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Commit 918953bc authored by Linus Torvalds's avatar Linus Torvalds
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Merge bk://kernel.bkbits.net/gregkh/linux/i2c-2.6 

into ppc970.osdl.org:/home/torvalds/v2.6/linux
parents 5a960cb1 7844de07
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Documentation/i2c/i2c-parport 0 → 100644
View file @ 918953bc
==================
i2c-parport driver
==================
2004-07-06, Jean Delvare
This is a unified driver for several i2c-over-parallel-port adapters,
such as the ones made by Philips, Velleman or ELV. This driver is
meant as a replacement for the older, individual drivers:
* i2c-philips-par
* i2c-elv
* i2c-velleman
* video/i2c-parport (NOT the same as this one, dedicated to home brew
teletext adapters)
It currently supports the following devices:
* Philips adapter
* home brew teletext adapter
* Velleman K8000 adapter
* ELV adapter
* Analog Devices evaluation boards (ADM1025, ADM1030, ADM1031, ADM1032)
These devices use different pinout configurations, so you have to tell
the driver what you have, using the type module parameter. There is no
way to autodetect the devices. Support for different pinout configurations
can be easily added when needed.
Building your own adapter
-------------------------
If you want to build you own i2c-over-parallel-port adapter, here is
a sample electronics schema (credits go to Sylvain Munaut):
Device PC
Side ___________________Vdd (+) Side
| | |
--- --- ---
| | | | | |
|R| |R| |R|
| | | | | |
--- --- ---
| | |
| | /| |
SCL ----------x--------o |-----------x------------------- pin 2
| \| | |
| | |
| |\ | |
SDA ----------x----x---| o---x--------------------------- pin 13
| |/ |
| |
| /| |
---------o |----------------x-------------- pin 3
\| | |
| |
--- ---
| | | |
|R| |R|
| | | |
--- ---
| |
### ###
GND GND
Remarks:
- This is the exact pinout and electronics used on the Analog Devices
evaluation boards.
/|
- All inverters -o |- must be 74HC05, they must be open collector output.
\|
- All resitors are 10k.
- Pins 18-25 of the parallel port connected to GND.
- Pins 4-9 (D2-D7) could be used as VDD is the driver drives them high.
The ADM1032 evaluation board uses D4-D7. Beware that the amount of
current you can draw from the parallel port is limited. Also note that
all connected lines MUST BE driven at the same state, else you'll short
circuit the output buffers! So plugging the I2C adapter after loading
the i2c-parport module might be a good safety since data line state
prior to init may be unknown.
- This is 5V!
- Obviously you cannot read SCL (so it's not really standard-compliant).
Pretty easy to add, just copy the SDA part and use another input pin.
That would give (ELV compatible pinout):
Device PC
Side ______________________________Vdd (+) Side
| | | |
--- --- --- ---
| | | | | | | |
|R| |R| |R| |R|
| | | | | | | |
--- --- --- ---
| | | |
| | |\ | |
SCL ----------x--------x--| o---x------------------------ pin 15
| | |/ |
| | |
| | /| |
| ---o |-------------x-------------- pin 2
| \| | |
| | |
| | |
| |\ | |
SDA ---------------x---x--| o--------x------------------- pin 10
| |/ |
| |
| /| |
---o |------------------x--------- pin 3
\| | |
| |
--- ---
| | | |
|R| |R|
| | | |
--- ---
| |
### ###
GND GND
If possible, you should use the same pinout configuration as existing
adapters do, so you won't even have to change the code.
Similar (but different) drivers
-------------------------------
This driver is NOT the same as the i2c-pport driver found in the i2c package.
The i2c-pport driver makes use of modern parallel port features so that
you don't need additional electronics. It has other restrictions however, and
was not ported to Linux 2.6 (yet).
This driver is also NOT the same as the i2c-pcf-epp driver found in the
lm_sensors package. The i2c-pcf-epp driver doesn't use the parallel port
as an I2C bus directly. Instead, it uses it to control an external I2C bus
master. That driver was not ported to Linux 2.6 (yet) either.
Legacy documentation for Velleman adapter
-----------------------------------------
Useful links:
Velleman http://www.velleman.be/
Velleman K8000 Howto http://howto.htlw16.ac.at/k8000-howto.html
The project has lead to new libs for the Velleman K8000 and K8005:
LIBK8000 v1.99.1 and LIBK8005 v0.21
With these libs, you can control the K8000 interface card and the K8005
stepper motor card with the simple commands which are in the original
Velleman software, like SetIOchannel, ReadADchannel, SendStepCCWFull and
many more, using /dev/velleman.
http://home.wanadoo.nl/hihihi/libk8000.htm
http://home.wanadoo.nl/hihihi/libk8005.htm
http://struyve.mine.nu:8080/index.php?block=k8000
http://sourceforge.net/projects/libk8005/
Documentation/i2c/i2c-pport deleted 100644 → 0
View file @ 5a960cb1
Primitive parallel port is driver for i2c bus, which exploits
features of modern bidirectional parallel ports.
Bidirectional ports have particular bits connected in following way:
|
/-----| R
--o| |-----|
read \-----| /------- Out pin
|/
- -|\
write V
|
---
It means when output is set to 1 we can read the port. Therefore
we can use 2 pins of parallel port as SDA and SCL for i2c bus. It
is not necessary to add any external - additional parts, we can
read and write the same port simultaneously.
I only use register base+2 so it is possible to use all
8 data bits of parallel port for other applications (I have
connected EEPROM and LCD display). I do not use bit Enable Bi-directional
Port. The only disadvantage is we can only support 5V chips.
Layout:
Cannon 25 pin
SDA - connect to pin 14 (Auto Linefeed)
SCL - connect to pin 16 (Initialize Printer)
GND - connect to pin 18-25
+5V - use external supply (I use 5V from 3.5" floppy connector)
no pullups requied
Module parameters:
base = 0xXXX
XXX - 278 or 378
That's all.
Daniel Smolik
marvin@sitour.cz
Documentation/i2c/i2c-velleman deleted 100644 → 0
View file @ 5a960cb1
i2c-velleman driver
-------------------
This is a driver for i2c-hw access for Velleman K8000 and other adapters.
Useful links
------------
Velleman:
http://www.velleman.be/
Velleman K8000 Howto:
http://howto.htlw16.ac.at/k8000-howto.html
K8000 and K8005 libraries
-------------------------
The project has lead to new libs for the Velleman K8000 and K8005:
LIBK8000 v1.99.1 and LIBK8005 v0.21
With these libs, you can control the K8000 interface card and the K8005
stepper motor card with the simple commands which are in the original
Velleman software, like SetIOchannel, ReadADchannel, SendStepCCWFull and
many more, using /dev/velleman.
The libs can be found on http://groups.yahoo.com/group/k8000/files/linux/
MAINTAINERS
View file @ 918953bc
...@@ -2374,6 +2374,12 @@ P: Gerd Knorr ...@@ -2374,6 +2374,12 @@ P: Gerd Knorr
M: kraxel@bytesex.org M: kraxel@bytesex.org
S: Maintained S: Maintained
W1 DALLAS'S 1-WIRE BUS
P: Evgeniy Polyakov
M: johnpol@2ka.mipt.ru
L: sensors@stimpy.netroedge.com
S: Maintained
WAN ROUTER & SANGOMA WANPIPE DRIVERS & API (X.25, FRAME RELAY, PPP, CISCO HDLC) WAN ROUTER & SANGOMA WANPIPE DRIVERS & API (X.25, FRAME RELAY, PPP, CISCO HDLC)
P: Nenad Corbic P: Nenad Corbic
M: ncorbic@sangoma.com M: ncorbic@sangoma.com
......
drivers/Kconfig
View file @ 918953bc
...@@ -42,6 +42,8 @@ source "drivers/char/Kconfig" ...@@ -42,6 +42,8 @@ source "drivers/char/Kconfig"
source "drivers/i2c/Kconfig" source "drivers/i2c/Kconfig"
source "drivers/w1/Kconfig"
source "drivers/misc/Kconfig" source "drivers/misc/Kconfig"
source "drivers/media/Kconfig" source "drivers/media/Kconfig"
......
drivers/Makefile
View file @ 918953bc
...@@ -42,6 +42,7 @@ obj-$(CONFIG_GAMEPORT) += input/gameport/ ...@@ -42,6 +42,7 @@ obj-$(CONFIG_GAMEPORT) += input/gameport/
obj-$(CONFIG_SERIO) += input/serio/ obj-$(CONFIG_SERIO) += input/serio/
obj-$(CONFIG_I2O) += message/ obj-$(CONFIG_I2O) += message/
obj-$(CONFIG_I2C) += i2c/ obj-$(CONFIG_I2C) += i2c/
obj-$(CONFIG_W1) += w1/
obj-$(CONFIG_PHONE) += telephony/ obj-$(CONFIG_PHONE) += telephony/
obj-$(CONFIG_MD) += md/ obj-$(CONFIG_MD) += md/
obj-$(CONFIG_BT) += bluetooth/ obj-$(CONFIG_BT) += bluetooth/
......
drivers/i2c/busses/i2c-elektor.c
View file @ 918953bc
...@@ -143,7 +143,7 @@ static int pcf_isa_init(void) ...@@ -143,7 +143,7 @@ static int pcf_isa_init(void)
} }
} }
if (irq > 0) { if (irq > 0) {
if (request_irq(irq, pcf_isa_handler, 0, "PCF8584", 0) < 0) { if (request_irq(irq, pcf_isa_handler, 0, "PCF8584", NULL) < 0) {
printk(KERN_ERR "i2c-elektor: Request irq%d failed\n", irq); printk(KERN_ERR "i2c-elektor: Request irq%d failed\n", irq);
irq = 0; irq = 0;
} else } else
...@@ -244,7 +244,7 @@ static int __init i2c_pcfisa_init(void) ...@@ -244,7 +244,7 @@ static int __init i2c_pcfisa_init(void)
fail: fail:
if (irq > 0) { if (irq > 0) {
disable_irq(irq); disable_irq(irq);
free_irq(irq, 0); free_irq(irq, NULL);
} }
if (!mmapped) if (!mmapped)
...@@ -258,7 +258,7 @@ static void i2c_pcfisa_exit(void) ...@@ -258,7 +258,7 @@ static void i2c_pcfisa_exit(void)
if (irq > 0) { if (irq > 0) {
disable_irq(irq); disable_irq(irq);
free_irq(irq, 0); free_irq(irq, NULL);
} }
if (!mmapped) if (!mmapped)
......
drivers/i2c/busses/i2c-ibm_iic.c
View file @ 918953bc
...@@ -45,7 +45,7 @@ ...@@ -45,7 +45,7 @@
#include "i2c-ibm_iic.h" #include "i2c-ibm_iic.h"
#define DRIVER_VERSION "2.01" #define DRIVER_VERSION "2.1"
MODULE_DESCRIPTION("IBM IIC driver v" DRIVER_VERSION); MODULE_DESCRIPTION("IBM IIC driver v" DRIVER_VERSION);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
...@@ -96,6 +96,31 @@ static void dump_iic_regs(const char* header, struct ibm_iic_private* dev) ...@@ -96,6 +96,31 @@ static void dump_iic_regs(const char* header, struct ibm_iic_private* dev)
# define DUMP_REGS(h,dev) ((void)0) # define DUMP_REGS(h,dev) ((void)0)
#endif #endif
/* Bus timings (in ns) for bit-banging */
static struct i2c_timings {
unsigned int hd_sta;
unsigned int su_sto;
unsigned int low;
unsigned int high;
unsigned int buf;
} timings [] = {
/* Standard mode (100 KHz) */
{
.hd_sta = 4000,
.su_sto = 4000,
.low = 4700,
.high = 4000,
.buf = 4700,
},
/* Fast mode (400 KHz) */
{
.hd_sta = 600,
.su_sto = 600,
.low = 1300,
.high = 600,
.buf = 1300,
}};
/* Enable/disable interrupt generation */ /* Enable/disable interrupt generation */
static inline void iic_interrupt_mode(struct ibm_iic_private* dev, int enable) static inline void iic_interrupt_mode(struct ibm_iic_private* dev, int enable)
{ {
...@@ -195,6 +220,104 @@ static void iic_dev_reset(struct ibm_iic_private* dev) ...@@ -195,6 +220,104 @@ static void iic_dev_reset(struct ibm_iic_private* dev)
iic_dev_init(dev); iic_dev_init(dev);
} }
/*
* Do 0-length transaction using bit-banging through IIC_DIRECTCNTL register.
*/
/* Wait for SCL and/or SDA to be high */
static int iic_dc_wait(volatile struct iic_regs *iic, u8 mask)
{
unsigned long x = jiffies + HZ / 28 + 2;
while ((in_8(&iic->directcntl) & mask) != mask){
if (unlikely(time_after(jiffies, x)))
return -1;
cond_resched();
}
return 0;
}
static int iic_smbus_quick(struct ibm_iic_private* dev, const struct i2c_msg* p)
{
volatile struct iic_regs* iic = dev->vaddr;
const struct i2c_timings* t = &timings[dev->fast_mode ? 1 : 0];
u8 mask, v, sda;
int i, res;
/* Only 7-bit addresses are supported */
if (unlikely(p->flags & I2C_M_TEN)){
DBG("%d: smbus_quick - 10 bit addresses are not supported\n",
dev->idx);
return -EINVAL;
}
DBG("%d: smbus_quick(0x%02x)\n", dev->idx, p->addr);
/* Reset IIC interface */
out_8(&iic->xtcntlss, XTCNTLSS_SRST);
/* Wait for bus to become free */
out_8(&iic->directcntl, DIRCNTL_SDAC | DIRCNTL_SCC);
if (unlikely(iic_dc_wait(iic, DIRCNTL_MSDA | DIRCNTL_MSC)))
goto err;
ndelay(t->buf);
/* START */
out_8(&iic->directcntl, DIRCNTL_SCC);
sda = 0;
ndelay(t->hd_sta);
/* Send address */
v = (u8)((p->addr << 1) | ((p->flags & I2C_M_RD) ? 1 : 0));
for (i = 0, mask = 0x80; i < 8; ++i, mask >>= 1){
out_8(&iic->directcntl, sda);
ndelay(t->low / 2);
sda = (v & mask) ? DIRCNTL_SDAC : 0;
out_8(&iic->directcntl, sda);
ndelay(t->low / 2);
out_8(&iic->directcntl, DIRCNTL_SCC | sda);
if (unlikely(iic_dc_wait(iic, DIRCNTL_MSC)))
goto err;
ndelay(t->high);
}
/* ACK */
out_8(&iic->directcntl, sda);
ndelay(t->low / 2);
out_8(&iic->directcntl, DIRCNTL_SDAC);
ndelay(t->low / 2);
out_8(&iic->directcntl, DIRCNTL_SDAC | DIRCNTL_SCC);
if (unlikely(iic_dc_wait(iic, DIRCNTL_MSC)))
goto err;
res = (in_8(&iic->directcntl) & DIRCNTL_MSDA) ? -EREMOTEIO : 1;
ndelay(t->high);
/* STOP */
out_8(&iic->directcntl, 0);
ndelay(t->low);
out_8(&iic->directcntl, DIRCNTL_SCC);
if (unlikely(iic_dc_wait(iic, DIRCNTL_MSC)))
goto err;
ndelay(t->su_sto);
out_8(&iic->directcntl, DIRCNTL_SDAC | DIRCNTL_SCC);
ndelay(t->buf);
DBG("%d: smbus_quick -> %s\n", dev->idx, res ? "NACK" : "ACK");
out:
/* Remove reset */
out_8(&iic->xtcntlss, 0);
/* Reinitialize interface */
iic_dev_init(dev);
return res;
err:
DBG("%d: smbus_quick - bus is stuck\n", dev->idx);
res = -EREMOTEIO;
goto out;
}
/* /*
* IIC interrupt handler * IIC interrupt handler
*/ */
...@@ -457,13 +580,10 @@ static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) ...@@ -457,13 +580,10 @@ static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
if (unlikely(msgs[i].len <= 0)){ if (unlikely(msgs[i].len <= 0)){
if (num == 1 && !msgs[0].len){ if (num == 1 && !msgs[0].len){
/* Special case for I2C_SMBUS_QUICK emulation. /* Special case for I2C_SMBUS_QUICK emulation.
* Although this logic is FAR FROM PERFECT, this
* is what previous driver version did.
* IBM IIC doesn't support 0-length transactions * IBM IIC doesn't support 0-length transactions
* (except bit-banging through IICx_DIRECTCNTL). * so we have to emulate them using bit-banging.
*/ */
DBG("%d: zero-length msg kludge\n", dev->idx); return iic_smbus_quick(dev, &msgs[0]);
return 0;
} }
DBG("%d: invalid len %d in msg[%d]\n", dev->idx, DBG("%d: invalid len %d in msg[%d]\n", dev->idx,
msgs[i].len, i); msgs[i].len, i);
......
drivers/i2c/busses/scx200_acb.c
View file @ 918953bc
...@@ -458,6 +458,7 @@ static int __init scx200_acb_create(int base, int index) ...@@ -458,6 +458,7 @@ static int __init scx200_acb_create(int base, int index)
adapter->owner = THIS_MODULE; adapter->owner = THIS_MODULE;
adapter->id = I2C_ALGO_SMBUS; adapter->id = I2C_ALGO_SMBUS;
adapter->algo = &scx200_acb_algorithm; adapter->algo = &scx200_acb_algorithm;
adapter->class = I2C_CLASS_HWMON;
init_MUTEX(&iface->sem); init_MUTEX(&iface->sem);
......
drivers/i2c/chips/Kconfig
View file @ 918953bc
...@@ -22,6 +22,26 @@ config SENSORS_ADM1021 ...@@ -22,6 +22,26 @@ config SENSORS_ADM1021
This driver can also be built as a module. If so, the module This driver can also be built as a module. If so, the module
will be called adm1021. will be called adm1021.
config SENSORS_ADM1025
tristate "Analog Devices ADM1025 and compatibles"
depends on I2C && EXPERIMENTAL
select I2C_SENSOR
help
If you say yes here you get support for Analog Devices ADM1025
and Philips NE1619 sensor chips.
This driver can also be built as a module. If so, the module
will be called adm1025.
config SENSORS_ADM1031
tristate "Analog Devices ADM1031 and compatibles"
depends on I2C && EXPERIMENTAL
select I2C_SENSOR
help
If you say yes here you get support for Analog Devices ADM1031
and ADM1030 sensor chips.
This driver can also be built as a module. If so, the module
will be called adm1031.
config SENSORS_ASB100 config SENSORS_ASB100
tristate "Asus ASB100 Bach" tristate "Asus ASB100 Bach"
depends on I2C && EXPERIMENTAL depends on I2C && EXPERIMENTAL
...@@ -83,12 +103,27 @@ config SENSORS_LM75 ...@@ -83,12 +103,27 @@ config SENSORS_LM75
select I2C_SENSOR select I2C_SENSOR
help help
If you say yes here you get support for National Semiconductor LM75 If you say yes here you get support for National Semiconductor LM75
sensor chips and clones: Dallas Semi DS75 and DS1775, TelCon sensor chips and clones: Dallas Semiconductor DS75 and DS1775 (in
TCN75, and National Semiconductor LM77. 9-bit precision mode), and TelCom (now Microchip) TCN75.
The DS75 and DS1775 in 10- to 12-bit precision modes will require
a force module parameter. The driver will not handle the extra
precision anyhow.
This driver can also be built as a module. If so, the module This driver can also be built as a module. If so, the module
will be called lm75. will be called lm75.
config SENSORS_LM77
tristate "National Semiconductor LM77"
depends on I2C && EXPERIMENTAL
select I2C_SENSOR
help
If you say yes here you get support for National Semiconductor LM77
sensor chips.
This driver can also be built as a module. If so, the module
will be called lm77.
config SENSORS_LM78 config SENSORS_LM78
tristate "National Semiconductor LM78 and compatibles" tristate "National Semiconductor LM78 and compatibles"
depends on I2C && EXPERIMENTAL depends on I2C && EXPERIMENTAL
...@@ -140,7 +175,8 @@ config SENSORS_LM90 ...@@ -140,7 +175,8 @@ config SENSORS_LM90
select I2C_SENSOR select I2C_SENSOR
help help
If you say yes here you get support for National Semiconductor LM90, If you say yes here you get support for National Semiconductor LM90,
LM89 and LM99, and Analog Devices ADM1032 sensor chips. LM86, LM89 and LM99, Analog Devices ADM1032 and Maxim MAX6657 and
MAX6658 sensor chips.
This driver can also be built as a module. If so, the module This driver can also be built as a module. If so, the module
will be called lm90. will be called lm90.
......
drivers/i2c/chips/Makefile
View file @ 918953bc
...@@ -8,12 +8,15 @@ obj-$(CONFIG_SENSORS_W83627HF) += w83627hf.o ...@@ -8,12 +8,15 @@ obj-$(CONFIG_SENSORS_W83627HF) += w83627hf.o
obj-$(CONFIG_SENSORS_W83781D) += w83781d.o obj-$(CONFIG_SENSORS_W83781D) += w83781d.o
obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o
obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o
obj-$(CONFIG_SENSORS_ADM1031) += adm1031.o
obj-$(CONFIG_SENSORS_DS1621) += ds1621.o obj-$(CONFIG_SENSORS_DS1621) += ds1621.o
obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o
obj-$(CONFIG_SENSORS_FSCHER) += fscher.o obj-$(CONFIG_SENSORS_FSCHER) += fscher.o
obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
obj-$(CONFIG_SENSORS_IT87) += it87.o obj-$(CONFIG_SENSORS_IT87) += it87.o
obj-$(CONFIG_SENSORS_LM75) += lm75.o obj-$(CONFIG_SENSORS_LM75) += lm75.o
obj-$(CONFIG_SENSORS_LM77) += lm77.o
obj-$(CONFIG_SENSORS_LM78) += lm78.o obj-$(CONFIG_SENSORS_LM78) += lm78.o
obj-$(CONFIG_SENSORS_LM80) += lm80.o obj-$(CONFIG_SENSORS_LM80) += lm80.o
obj-$(CONFIG_SENSORS_LM83) += lm83.o obj-$(CONFIG_SENSORS_LM83) += lm83.o
......
drivers/i2c/chips/adm1025.c 0 → 100644
View file @ 918953bc
/*
* adm1025.c
*
* Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com>
* Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
*
* The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6
* voltages (including its own power source) and up to two temperatures
* (its own plus up to one external one). Voltages are scaled internally
* (which is not the common way) with ratios such that the nominal value
* of each voltage correspond to a register value of 192 (which means a
* resolution of about 0.5% of the nominal value). Temperature values are
* reported with a 1 deg resolution and a 3 deg accuracy. Complete
* datasheet can be obtained from Analog's website at:
* http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html
*
* This driver also supports the ADM1025A, which differs from the ADM1025
* only in that it has "open-drain VID inputs while the ADM1025 has
* on-chip 100k pull-ups on the VID inputs". It doesn't make any
* difference for us.
*
* This driver also supports the NE1619, a sensor chip made by Philips.
* That chip is similar to the ADM1025A, with a few differences. The only
* difference that matters to us is that the NE1619 has only two possible
* addresses while the ADM1025A has a third one. Complete datasheet can be
* obtained from Philips's website at:
* http://www.semiconductors.philips.com/pip/NE1619DS.html
*
* Since the ADM1025 was the first chipset supported by this driver, most
* comments will refer to this chipset, but are actually general and
* concern all supported chipsets, unless mentioned otherwise.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
#include <linux/i2c-vid.h>
/*
* Addresses to scan
* ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
* NE1619 has two possible addresses: 0x2c and 0x2d.
*/
static unsigned short normal_i2c[] = { I2C_CLIENT_END };
static unsigned short normal_i2c_range[] = { 0x2c, 0x2e, I2C_CLIENT_END };
static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
/*
* Insmod parameters
*/
SENSORS_INSMOD_2(adm1025, ne1619);
/*
* The ADM1025 registers
*/
#define ADM1025_REG_MAN_ID 0x3E
#define ADM1025_REG_CHIP_ID 0x3F
#define ADM1025_REG_CONFIG 0x40
#define ADM1025_REG_STATUS1 0x41
#define ADM1025_REG_STATUS2 0x42
#define ADM1025_REG_IN(nr) (0x20 + (nr))
#define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2)
#define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2)
#define ADM1025_REG_TEMP(nr) (0x26 + (nr))
#define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2)
#define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2)
#define ADM1025_REG_VID 0x47
#define ADM1025_REG_VID4 0x49
/*
* Conversions and various macros
* The ADM1025 uses signed 8-bit values for temperatures.
*/
static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192)
#define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \
(val) * 192 >= (scale) * 255 ? 255 : \
((val) * 192 + (scale)/2) / (scale))
#define TEMP_FROM_REG(reg) ((reg) * 1000)
#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
(val) >= 126500 ? 127 : \
(((val) < 0 ? (val)-500 : (val)+500) / 1000))
/*
* Functions declaration
*/
static int adm1025_attach_adapter(struct i2c_adapter *adapter);
static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
static void adm1025_init_client(struct i2c_client *client);
static int adm1025_detach_client(struct i2c_client *client);
static struct adm1025_data *adm1025_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
static struct i2c_driver adm1025_driver = {
.owner = THIS_MODULE,
.name = "adm1025",
.id = I2C_DRIVERID_ADM1025,
.flags = I2C_DF_NOTIFY,
.attach_adapter = adm1025_attach_adapter,
.detach_client = adm1025_detach_client,
};
/*
* Client data (each client gets its own)
*/
struct adm1025_data {
struct i2c_client client;
struct semaphore update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* in jiffies */
u8 in[6]; /* register value */
u8 in_max[6]; /* register value */
u8 in_min[6]; /* register value */
s8 temp[2]; /* register value */
s8 temp_min[2]; /* register value */
s8 temp_max[2]; /* register value */
u16 alarms; /* register values, combined */
u8 vid; /* register values, combined */
u8 vrm;
};
/*
* Internal variables
*/
static int adm1025_id = 0;
/*
* Sysfs stuff
*/
#define show_in(offset) \
static ssize_t show_in##offset(struct device *dev, char *buf) \
{ \
struct adm1025_data *data = adm1025_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
in_scale[offset])); \
} \
static ssize_t show_in##offset##_min(struct device *dev, char *buf) \
{ \
struct adm1025_data *data = adm1025_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
in_scale[offset])); \
} \
static ssize_t show_in##offset##_max(struct device *dev, char *buf) \
{ \
struct adm1025_data *data = adm1025_update_device(dev); \
return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
in_scale[offset])); \
} \
static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);
show_in(0);
show_in(1);
show_in(2);
show_in(3);
show_in(4);
show_in(5);
#define show_temp(offset) \
static ssize_t show_temp##offset(struct device *dev, char *buf) \
{ \
struct adm1025_data *data = adm1025_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
} \
static ssize_t show_temp##offset##_min(struct device *dev, char *buf) \
{ \
struct adm1025_data *data = adm1025_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \
} \
static ssize_t show_temp##offset##_max(struct device *dev, char *buf) \
{ \
struct adm1025_data *data = adm1025_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \
}\
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL);
show_temp(1);
show_temp(2);
#define set_in(offset) \
static ssize_t set_in##offset##_min(struct device *dev, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct adm1025_data *data = i2c_get_clientdata(client); \
data->in_min[offset] = IN_TO_REG(simple_strtol(buf, NULL, 10), \
in_scale[offset]); \
i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \
data->in_min[offset]); \
return count; \
} \
static ssize_t set_in##offset##_max(struct device *dev, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct adm1025_data *data = i2c_get_clientdata(client); \
data->in_max[offset] = IN_TO_REG(simple_strtol(buf, NULL, 10), \
in_scale[offset]); \
i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \
data->in_max[offset]); \
return count; \
} \
static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
show_in##offset##_min, set_in##offset##_min); \
static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
show_in##offset##_max, set_in##offset##_max);
set_in(0);
set_in(1);
set_in(2);
set_in(3);
set_in(4);
set_in(5);
#define set_temp(offset) \
static ssize_t set_temp##offset##_min(struct device *dev, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct adm1025_data *data = i2c_get_clientdata(client); \
data->temp_min[offset-1] = TEMP_TO_REG(simple_strtol(buf, NULL, 10)); \
i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \
data->temp_min[offset-1]); \
return count; \
} \
static ssize_t set_temp##offset##_max(struct device *dev, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct adm1025_data *data = i2c_get_clientdata(client); \
data->temp_max[offset-1] = TEMP_TO_REG(simple_strtol(buf, NULL, 10)); \
i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \
data->temp_max[offset-1]); \
return count; \
} \
static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
show_temp##offset##_min, set_temp##offset##_min); \
static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
show_temp##offset##_max, set_temp##offset##_max);
set_temp(1);
set_temp(2);
static ssize_t show_alarms(struct device *dev, char *buf)
{
struct adm1025_data *data = adm1025_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_vid(struct device *dev, char *buf)
{
struct adm1025_data *data = adm1025_update_device(dev);
return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(in1_ref, S_IRUGO, show_vid, NULL);
static ssize_t show_vrm(struct device *dev, char *buf)
{
struct adm1025_data *data = adm1025_update_device(dev);
return sprintf(buf, "%u\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1025_data *data = i2c_get_clientdata(client);
data->vrm = simple_strtoul(buf, NULL, 10);
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
/*
* Real code
*/
static int adm1025_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_detect(adapter, &addr_data, adm1025_detect);
}
/*
* The following function does more than just detection. If detection
* succeeds, it also registers the new chip.
*/
static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct adm1025_data *data;
int err = 0;
const char *name = "";
u8 config;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kmalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
memset(data, 0, sizeof(struct adm1025_data));
/* The common I2C client data is placed right before the
ADM1025-specific data. */
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &adm1025_driver;
new_client->flags = 0;
/*
* Now we do the remaining detection. A negative kind means that
* the driver was loaded with no force parameter (default), so we
* must both detect and identify the chip. A zero kind means that
* the driver was loaded with the force parameter, the detection
* step shall be skipped. A positive kind means that the driver
* was loaded with the force parameter and a given kind of chip is
* requested, so both the detection and the identification steps
* are skipped.
*/
config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG);
if (kind < 0) { /* detection */
if ((config & 0x80) != 0x00
|| (i2c_smbus_read_byte_data(new_client,
ADM1025_REG_STATUS1) & 0xC0) != 0x00
|| (i2c_smbus_read_byte_data(new_client,
ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
dev_dbg(&adapter->dev,
"ADM1025 detection failed at 0x%02x.\n",
address);
goto exit_free;
}
}
if (kind <= 0) { /* identification */
u8 man_id, chip_id;
man_id = i2c_smbus_read_byte_data(new_client,
ADM1025_REG_MAN_ID);
chip_id = i2c_smbus_read_byte_data(new_client,
ADM1025_REG_CHIP_ID);
if (man_id == 0x41) { /* Analog Devices */
if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
kind = adm1025;
}
} else
if (man_id == 0xA1) { /* Philips */
if (address != 0x2E
&& (chip_id & 0xF0) == 0x20) { /* NE1619 */
kind = ne1619;
}
}
if (kind <= 0) { /* identification failed */
dev_info(&adapter->dev,
"Unsupported chip (man_id=0x%02X, "
"chip_id=0x%02X).\n", man_id, chip_id);
goto exit_free;
}
}
if (kind == adm1025) {
name = "adm1025";
} else if (kind == ne1619) {
name = "ne1619";
}
/* We can fill in the remaining client fields */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
new_client->id = adm1025_id++;
data->valid = 0;
init_MUTEX(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto exit_free;
/* Initialize the ADM1025 chip */
adm1025_init_client(new_client);
/* Register sysfs hooks */
device_create_file(&new_client->dev, &dev_attr_in0_input);
device_create_file(&new_client->dev, &dev_attr_in1_input);
device_create_file(&new_client->dev, &dev_attr_in2_input);
device_create_file(&new_client->dev, &dev_attr_in3_input);
device_create_file(&new_client->dev, &dev_attr_in5_input);
device_create_file(&new_client->dev, &dev_attr_in0_min);
device_create_file(&new_client->dev, &dev_attr_in1_min);
device_create_file(&new_client->dev, &dev_attr_in2_min);
device_create_file(&new_client->dev, &dev_attr_in3_min);
device_create_file(&new_client->dev, &dev_attr_in5_min);
device_create_file(&new_client->dev, &dev_attr_in0_max);
device_create_file(&new_client->dev, &dev_attr_in1_max);
device_create_file(&new_client->dev, &dev_attr_in2_max);
device_create_file(&new_client->dev, &dev_attr_in3_max);
device_create_file(&new_client->dev, &dev_attr_in5_max);
device_create_file(&new_client->dev, &dev_attr_temp1_input);
device_create_file(&new_client->dev, &dev_attr_temp2_input);
device_create_file(&new_client->dev, &dev_attr_temp1_min);
device_create_file(&new_client->dev, &dev_attr_temp2_min);
device_create_file(&new_client->dev, &dev_attr_temp1_max);
device_create_file(&new_client->dev, &dev_attr_temp2_max);
device_create_file(&new_client->dev, &dev_attr_alarms);
device_create_file(&new_client->dev, &dev_attr_in1_ref);
device_create_file(&new_client->dev, &dev_attr_vrm);
/* Pin 11 is either in4 (+12V) or VID4 */
if (!(config & 0x20)) {
device_create_file(&new_client->dev, &dev_attr_in4_input);
device_create_file(&new_client->dev, &dev_attr_in4_min);
device_create_file(&new_client->dev, &dev_attr_in4_max);
}
return 0;
exit_free:
kfree(data);
exit:
return err;
}
static void adm1025_init_client(struct i2c_client *client)
{
u8 reg;
struct adm1025_data *data = i2c_get_clientdata(client);
int i;
data->vrm = 82;
/*
* Set high limits
* Usually we avoid setting limits on driver init, but it happens
* that the ADM1025 comes with stupid default limits (all registers
* set to 0). In case the chip has not gone through any limit
* setting yet, we better set the high limits to the max so that
* no alarm triggers.
*/
for (i=0; i<6; i++) {
reg = i2c_smbus_read_byte_data(client,
ADM1025_REG_IN_MAX(i));
if (reg == 0)
i2c_smbus_write_byte_data(client,
ADM1025_REG_IN_MAX(i),
0xFF);
}
for (i=0; i<2; i++) {
reg = i2c_smbus_read_byte_data(client,
ADM1025_REG_TEMP_HIGH(i));
if (reg == 0)
i2c_smbus_write_byte_data(client,
ADM1025_REG_TEMP_HIGH(i),
0x7F);
}
/*
* Start the conversions
*/
reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
if (!(reg & 0x01))
i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
(reg&0x7E)|0x01);
}
static int adm1025_detach_client(struct i2c_client *client)
{
int err;
if ((err = i2c_detach_client(client))) {
dev_err(&client->dev, "Client deregistration failed, "
"client not detached.\n");
return err;
}
kfree(i2c_get_clientdata(client));
return 0;
}
static struct adm1025_data *adm1025_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1025_data *data = i2c_get_clientdata(client);
down(&data->update_lock);
if ((jiffies - data->last_updated > HZ * 2) ||
(jiffies < data->last_updated) ||
!data->valid) {
int i;
dev_dbg(&client->dev, "Updating data.\n");
for (i=0; i<6; i++) {
data->in[i] = i2c_smbus_read_byte_data(client,
ADM1025_REG_IN(i));
data->in_min[i] = i2c_smbus_read_byte_data(client,
ADM1025_REG_IN_MIN(i));
data->in_max[i] = i2c_smbus_read_byte_data(client,
ADM1025_REG_IN_MAX(i));
}
for (i=0; i<2; i++) {
data->temp[i] = i2c_smbus_read_byte_data(client,
ADM1025_REG_TEMP(i));
data->temp_min[i] = i2c_smbus_read_byte_data(client,
ADM1025_REG_TEMP_LOW(i));
data->temp_max[i] = i2c_smbus_read_byte_data(client,
ADM1025_REG_TEMP_HIGH(i));
}
data->alarms = i2c_smbus_read_byte_data(client,
ADM1025_REG_STATUS1)
| (i2c_smbus_read_byte_data(client,
ADM1025_REG_STATUS2) << 8);
data->vid = (i2c_smbus_read_byte_data(client,
ADM1025_REG_VID) & 0x0f)
| ((i2c_smbus_read_byte_data(client,
ADM1025_REG_VID4) & 0x01) << 4);
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
return data;
}
static int __init sensors_adm1025_init(void)
{
return i2c_add_driver(&adm1025_driver);
}
static void __exit sensors_adm1025_exit(void)
{
i2c_del_driver(&adm1025_driver);
}
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("ADM1025 driver");
MODULE_LICENSE("GPL");
module_init(sensors_adm1025_init);
module_exit(sensors_adm1025_exit);
drivers/i2c/chips/adm1031.c 0 → 100644
View file @ 918953bc
/*
adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Based on lm75.c and lm85.c
Supports adm1030 / adm1031
Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
Reworked by Jean Delvare <khali@linux-fr.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
/* Following macros takes channel parameter starting from 0 to 2 */
#define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
#define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
#define ADM1031_REG_PWM (0x22)
#define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))
#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4*(nr))
#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4*(nr))
#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4*(nr))
#define ADM1031_REG_TEMP(nr) (0xa + (nr))
#define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))
#define ADM1031_REG_STATUS(nr) (0x2 + (nr))
#define ADM1031_REG_CONF1 0x0
#define ADM1031_REG_CONF2 0x1
#define ADM1031_REG_EXT_TEMP 0x6
#define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
#define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
#define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */
#define ADM1031_CONF2_PWM1_ENABLE 0x01
#define ADM1031_CONF2_PWM2_ENABLE 0x02
#define ADM1031_CONF2_TACH1_ENABLE 0x04
#define ADM1031_CONF2_TACH2_ENABLE 0x08
#define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
/* Addresses to scan */
static unsigned short normal_i2c[] = { I2C_CLIENT_END };
static unsigned short normal_i2c_range[] = { 0x2c, 0x2e, I2C_CLIENT_END };
static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
/* Insmod parameters */
SENSORS_INSMOD_2(adm1030, adm1031);
typedef u8 auto_chan_table_t[8][2];
/* Each client has this additional data */
struct adm1031_data {
struct i2c_client client;
struct semaphore update_lock;
int chip_type;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
/* The chan_select_table contains the possible configurations for
* auto fan control.
*/
auto_chan_table_t *chan_select_table;
u16 alarm;
u8 conf1;
u8 conf2;
u8 fan[2];
u8 fan_div[2];
u8 fan_min[2];
u8 pwm[2];
u8 old_pwm[2];
s8 temp[3];
u8 ext_temp[3];
u8 auto_temp[3];
u8 auto_temp_min[3];
u8 auto_temp_off[3];
u8 auto_temp_max[3];
s8 temp_min[3];
s8 temp_max[3];
s8 temp_crit[3];
};
static int adm1031_attach_adapter(struct i2c_adapter *adapter);
static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind);
static void adm1031_init_client(struct i2c_client *client);
static int adm1031_detach_client(struct i2c_client *client);
static struct adm1031_data *adm1031_update_device(struct device *dev);
/* This is the driver that will be inserted */
static struct i2c_driver adm1031_driver = {
.owner = THIS_MODULE,
.name = "adm1031",
.flags = I2C_DF_NOTIFY,
.attach_adapter = adm1031_attach_adapter,
.detach_client = adm1031_detach_client,
};
static int adm1031_id;
static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static inline int
adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
#define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \
((val + 500) / 1000)))
#define TEMP_FROM_REG(val) ((val) * 1000)
#define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)
#define FAN_FROM_REG(reg, div) ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
static int FAN_TO_REG(int reg, int div)
{
int tmp;
tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
return tmp > 255 ? 255 : tmp;
}
#define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
#define PWM_TO_REG(val) (SENSORS_LIMIT((val), 0, 255) >> 4)
#define PWM_FROM_REG(val) ((val) << 4)
#define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7)
#define FAN_CHAN_TO_REG(val, reg) \
(((reg) & 0x1F) | (((val) << 5) & 0xe0))
#define AUTO_TEMP_MIN_TO_REG(val, reg) \
((((val)/500) & 0xf8)|((reg) & 0x7))
#define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1<< ((reg)&0x7)))
#define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2))
#define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
#define AUTO_TEMP_OFF_FROM_REG(reg) \
(AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
#define AUTO_TEMP_MAX_FROM_REG(reg) \
(AUTO_TEMP_RANGE_FROM_REG(reg) + \
AUTO_TEMP_MIN_FROM_REG(reg))
static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
{
int ret;
int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
ret = ((reg & 0xf8) |
(range < 10000 ? 0 :
range < 20000 ? 1 :
range < 40000 ? 2 : range < 80000 ? 3 : 4));
return ret;
}
/* FAN auto control */
#define GET_FAN_AUTO_BITFIELD(data, idx) \
(*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
/* The tables below contains the possible values for the auto fan
* control bitfields. the index in the table is the register value.
* MSb is the auto fan control enable bit, so the four first entries
* in the table disables auto fan control when both bitfields are zero.
*/
static auto_chan_table_t auto_channel_select_table_adm1031 = {
{0, 0}, {0, 0}, {0, 0}, {0, 0},
{2 /*0b010 */ , 4 /*0b100 */ },
{2 /*0b010 */ , 2 /*0b010 */ },
{4 /*0b100 */ , 4 /*0b100 */ },
{7 /*0b111 */ , 7 /*0b111 */ },
};
static auto_chan_table_t auto_channel_select_table_adm1030 = {
{0, 0}, {0, 0}, {0, 0}, {0, 0},
{2 /*0b10 */ , 0},
{0xff /*invalid */ , 0},
{0xff /*invalid */ , 0},
{3 /*0b11 */ , 0},
};
/* That function checks if a bitfield is valid and returns the other bitfield
* nearest match if no exact match where found.
*/
static int
get_fan_auto_nearest(struct adm1031_data *data,
int chan, u8 val, u8 reg, u8 * new_reg)
{
int i;
int first_match = -1, exact_match = -1;
u8 other_reg_val =
(*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
if (val == 0) {
*new_reg = 0;
return 0;
}
for (i = 0; i < 8; i++) {
if ((val == (*data->chan_select_table)[i][chan]) &&
((*data->chan_select_table)[i][chan ? 0 : 1] ==
other_reg_val)) {
/* We found an exact match */
exact_match = i;
break;
} else if (val == (*data->chan_select_table)[i][chan] &&
first_match == -1) {
/* Save the first match in case of an exact match has not been
* found
*/
first_match = i;
}
}
if (exact_match >= 0) {
*new_reg = exact_match;
} else if (first_match >= 0) {
*new_reg = first_match;
} else {
return -EINVAL;
}
return 0;
}
static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
}
static ssize_t
set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
u8 reg;
int ret;
u8 old_fan_mode;
old_fan_mode = data->conf1;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
up(&data->update_lock);
return ret;
}
if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^
(old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
/* Switch to Auto Fan Mode
* Save PWM registers
* Set PWM registers to 33% Both */
data->old_pwm[0] = data->pwm[0];
data->old_pwm[1] = data->pwm[1];
adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
} else {
/* Switch to Manual Mode */
data->pwm[0] = data->old_pwm[0];
data->pwm[1] = data->old_pwm[1];
/* Restore PWM registers */
adm1031_write_value(client, ADM1031_REG_PWM,
data->pwm[0] | (data->pwm[1] << 4));
}
}
data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
up(&data->update_lock);
return count;
}
#define fan_auto_channel_offset(offset) \
static ssize_t show_fan_auto_channel_##offset (struct device *dev, char *buf) \
{ \
return show_fan_auto_channel(dev, buf, 0x##offset - 1); \
} \
static ssize_t set_fan_auto_channel_##offset (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_fan_auto_channel(dev, buf, count, 0x##offset - 1); \
} \
static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR, \
show_fan_auto_channel_##offset, \
set_fan_auto_channel_##offset)
fan_auto_channel_offset(1);
fan_auto_channel_offset(2);
/* Auto Temps */
static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n",
AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
}
static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n",
AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
}
static ssize_t
set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
data->auto_temp[nr]);
up(&data->update_lock);
return count;
}
static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n",
AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
}
static ssize_t
set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
data->temp_max[nr]);
up(&data->update_lock);
return count;
}
#define auto_temp_reg(offset) \
static ssize_t show_auto_temp_##offset##_off (struct device *dev, char *buf) \
{ \
return show_auto_temp_off(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_auto_temp_##offset##_min (struct device *dev, char *buf) \
{ \
return show_auto_temp_min(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_auto_temp_##offset##_max (struct device *dev, char *buf) \
{ \
return show_auto_temp_max(dev, buf, 0x##offset - 1); \
} \
static ssize_t set_auto_temp_##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_auto_temp_min(dev, buf, count, 0x##offset - 1); \
} \
static ssize_t set_auto_temp_##offset##_max (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_auto_temp_max(dev, buf, count, 0x##offset - 1); \
} \
static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO, \
show_auto_temp_##offset##_off, NULL); \
static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR, \
show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR, \
show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
auto_temp_reg(1);
auto_temp_reg(2);
auto_temp_reg(3);
/* pwm */
static ssize_t show_pwm(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
}
static ssize_t
set_pwm(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
int reg;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
(((val>>4) & 0xf) != 5)) {
/* In automatic mode, the only PWM accepted is 33% */
up(&data->update_lock);
return -EINVAL;
}
data->pwm[nr] = PWM_TO_REG(val);
reg = adm1031_read_value(client, ADM1031_REG_PWM);
adm1031_write_value(client, ADM1031_REG_PWM,
nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
: (data->pwm[nr] & 0xf) | (reg & 0xf0));
up(&data->update_lock);
return count;
}
#define pwm_reg(offset) \
static ssize_t show_pwm_##offset (struct device *dev, char *buf) \
{ \
return show_pwm(dev, buf, 0x##offset - 1); \
} \
static ssize_t set_pwm_##offset (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_pwm(dev, buf, count, 0x##offset - 1); \
} \
static DEVICE_ATTR(fan##offset##_pwm, S_IRUGO | S_IWUSR, \
show_pwm_##offset, set_pwm_##offset)
pwm_reg(1);
pwm_reg(2);
/* Fans */
/*
* That function checks the cases where the fan reading is not
* relevent. It is used to provide 0 as fan reading when the fan is
* not supposed to run
*/
static int trust_fan_readings(struct adm1031_data *data, int chan)
{
int res = 0;
if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
switch (data->conf1 & 0x60) {
case 0x00: /* remote temp1 controls fan1 remote temp2 controls fan2 */
res = data->temp[chan+1] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
break;
case 0x20: /* remote temp1 controls both fans */
res =
data->temp[1] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
break;
case 0x40: /* remote temp2 controls both fans */
res =
data->temp[2] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
break;
case 0x60: /* max controls both fans */
res =
data->temp[0] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
|| data->temp[1] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
|| (data->chip_type == adm1031
&& data->temp[2] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
break;
}
} else {
res = data->pwm[chan] > 0;
}
return res;
}
static ssize_t show_fan(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
int value;
value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
return sprintf(buf, "%d\n", value);
}
static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
}
static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n",
FAN_FROM_REG(data->fan_min[nr],
FAN_DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t
set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
if (val) {
data->fan_min[nr] =
FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
} else {
data->fan_min[nr] = 0xff;
}
adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
up(&data->update_lock);
return count;
}
static ssize_t
set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
u8 tmp;
int old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
int new_min;
val = simple_strtol(buf, NULL, 10);
tmp = val == 8 ? 0xc0 :
val == 4 ? 0x80 :
val == 2 ? 0x40 :
val == 1 ? 0x00 :
0xff;
if (tmp == 0xff)
return -EINVAL;
down(&data->update_lock);
data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
new_min = data->fan_min[nr] * old_div /
FAN_DIV_FROM_REG(data->fan_div[nr]);
data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
data->fan[nr] = data->fan[nr] * old_div /
FAN_DIV_FROM_REG(data->fan_div[nr]);
adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
data->fan_div[nr]);
adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
data->fan_min[nr]);
up(&data->update_lock);
return count;
}
#define fan_offset(offset) \
static ssize_t show_fan_##offset (struct device *dev, char *buf) \
{ \
return show_fan(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_fan_##offset##_min (struct device *dev, char *buf) \
{ \
return show_fan_min(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_fan_##offset##_div (struct device *dev, char *buf) \
{ \
return show_fan_div(dev, buf, 0x##offset - 1); \
} \
static ssize_t set_fan_##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_fan_min(dev, buf, count, 0x##offset - 1); \
} \
static ssize_t set_fan_##offset##_div (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_fan_div(dev, buf, count, 0x##offset - 1); \
} \
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, \
NULL); \
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan_##offset##_min, set_fan_##offset##_min); \
static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
show_fan_##offset##_div, set_fan_##offset##_div); \
static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR, \
show_pwm_##offset, set_pwm_##offset)
fan_offset(1);
fan_offset(2);
/* Temps */
static ssize_t show_temp(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
int ext;
ext = nr == 0 ?
((data->ext_temp[nr] >> 6) & 0x3) * 2 :
(((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
}
static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
}
static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
}
static ssize_t show_temp_crit(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
}
static ssize_t
set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
val = simple_strtol(buf, NULL, 10);
val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
down(&data->update_lock);
data->temp_min[nr] = TEMP_TO_REG(val);
adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
data->temp_min[nr]);
up(&data->update_lock);
return count;
}
static ssize_t
set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
val = simple_strtol(buf, NULL, 10);
val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
down(&data->update_lock);
data->temp_max[nr] = TEMP_TO_REG(val);
adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
data->temp_max[nr]);
up(&data->update_lock);
return count;
}
static ssize_t
set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int val;
val = simple_strtol(buf, NULL, 10);
val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
down(&data->update_lock);
data->temp_crit[nr] = TEMP_TO_REG(val);
adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
data->temp_crit[nr]);
up(&data->update_lock);
return count;
}
#define temp_reg(offset) \
static ssize_t show_temp_##offset (struct device *dev, char *buf) \
{ \
return show_temp(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_temp_##offset##_min (struct device *dev, char *buf) \
{ \
return show_temp_min(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_temp_##offset##_max (struct device *dev, char *buf) \
{ \
return show_temp_max(dev, buf, 0x##offset - 1); \
} \
static ssize_t show_temp_##offset##_crit (struct device *dev, char *buf) \
{ \
return show_temp_crit(dev, buf, 0x##offset - 1); \
} \
static ssize_t set_temp_##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_min(dev, buf, count, 0x##offset - 1); \
} \
static ssize_t set_temp_##offset##_max (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_max(dev, buf, count, 0x##offset - 1); \
} \
static ssize_t set_temp_##offset##_crit (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_crit(dev, buf, count, 0x##offset - 1); \
} \
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, \
NULL); \
static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp_##offset##_min, set_temp_##offset##_min); \
static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
show_temp_##offset##_max, set_temp_##offset##_max); \
static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR, \
show_temp_##offset##_crit, set_temp_##offset##_crit)
temp_reg(1);
temp_reg(2);
temp_reg(3);
/* Alarms */
static ssize_t show_alarms(struct device *dev, char *buf)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", data->alarm);
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static int adm1031_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_detect(adapter, &addr_data, adm1031_detect);
}
/* This function is called by i2c_detect */
static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct adm1031_data *data;
int err = 0;
const char *name = "";
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kmalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
memset(data, 0, sizeof(struct adm1031_data));
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &adm1031_driver;
new_client->flags = 0;
if (kind < 0) {
int id, co;
id = i2c_smbus_read_byte_data(new_client, 0x3d);
co = i2c_smbus_read_byte_data(new_client, 0x3e);
if (!((id == 0x31 || id == 0x30) && co == 0x41))
goto exit_free;
kind = (id == 0x30) ? adm1030 : adm1031;
}
if (kind <= 0)
kind = adm1031;
/* Given the detected chip type, set the chip name and the
* auto fan control helper table. */
if (kind == adm1030) {
name = "adm1030";
data->chan_select_table = &auto_channel_select_table_adm1030;
} else if (kind == adm1031) {
name = "adm1031";
data->chan_select_table = &auto_channel_select_table_adm1031;
}
data->chip_type = kind;
strlcpy(new_client->name, name, I2C_NAME_SIZE);
new_client->id = adm1031_id++;
data->valid = 0;
init_MUTEX(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto exit_free;
/* Initialize the ADM1031 chip */
adm1031_init_client(new_client);
/* Register sysfs hooks */
device_create_file(&new_client->dev, &dev_attr_fan1_input);
device_create_file(&new_client->dev, &dev_attr_fan1_div);
device_create_file(&new_client->dev, &dev_attr_fan1_min);
device_create_file(&new_client->dev, &dev_attr_fan1_pwm);
device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
device_create_file(&new_client->dev, &dev_attr_temp1_input);
device_create_file(&new_client->dev, &dev_attr_temp1_min);
device_create_file(&new_client->dev, &dev_attr_temp1_max);
device_create_file(&new_client->dev, &dev_attr_temp1_crit);
device_create_file(&new_client->dev, &dev_attr_temp2_input);
device_create_file(&new_client->dev, &dev_attr_temp2_min);
device_create_file(&new_client->dev, &dev_attr_temp2_max);
device_create_file(&new_client->dev, &dev_attr_temp2_crit);
device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
device_create_file(&new_client->dev, &dev_attr_alarms);
if (kind == adm1031) {
device_create_file(&new_client->dev, &dev_attr_fan2_input);
device_create_file(&new_client->dev, &dev_attr_fan2_div);
device_create_file(&new_client->dev, &dev_attr_fan2_min);
device_create_file(&new_client->dev, &dev_attr_fan2_pwm);
device_create_file(&new_client->dev,
&dev_attr_auto_fan2_channel);
device_create_file(&new_client->dev, &dev_attr_temp3_input);
device_create_file(&new_client->dev, &dev_attr_temp3_min);
device_create_file(&new_client->dev, &dev_attr_temp3_max);
device_create_file(&new_client->dev, &dev_attr_temp3_crit);
device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
}
return 0;
exit_free:
kfree(new_client);
exit:
return err;
}
static int adm1031_detach_client(struct i2c_client *client)
{
int ret;
if ((ret = i2c_detach_client(client)) != 0) {
return ret;
}
kfree(client);
return 0;
}
static void adm1031_init_client(struct i2c_client *client)
{
unsigned int read_val;
unsigned int mask;
struct adm1031_data *data = i2c_get_clientdata(client);
mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
if (data->chip_type == adm1031) {
mask |= (ADM1031_CONF2_PWM2_ENABLE |
ADM1031_CONF2_TACH2_ENABLE);
}
/* Initialize the ADM1031 chip (enables fan speed reading ) */
read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
if ((read_val | mask) != read_val) {
adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
}
read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
ADM1031_CONF1_MONITOR_ENABLE);
}
}
static struct adm1031_data *adm1031_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int chan;
down(&data->update_lock);
if ((jiffies - data->last_updated > HZ + HZ / 2) ||
(jiffies < data->last_updated) || !data->valid) {
dev_dbg(&client->dev, "Starting adm1031 update\n");
for (chan = 0;
chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
u8 oldh, newh;
oldh =
adm1031_read_value(client, ADM1031_REG_TEMP(chan));
data->ext_temp[chan] =
adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
newh =
adm1031_read_value(client, ADM1031_REG_TEMP(chan));
if (newh != oldh) {
data->ext_temp[chan] =
adm1031_read_value(client,
ADM1031_REG_EXT_TEMP);
#ifdef DEBUG
oldh =
adm1031_read_value(client,
ADM1031_REG_TEMP(chan));
/* oldh is actually newer */
if (newh != oldh)
dev_warn(&client->dev,
"Remote temperature may be "
"wrong.\n");
#endif
}
data->temp[chan] = newh;
data->temp_min[chan] =
adm1031_read_value(client,
ADM1031_REG_TEMP_MIN(chan));
data->temp_max[chan] =
adm1031_read_value(client,
ADM1031_REG_TEMP_MAX(chan));
data->temp_crit[chan] =
adm1031_read_value(client,
ADM1031_REG_TEMP_CRIT(chan));
data->auto_temp[chan] =
adm1031_read_value(client,
ADM1031_REG_AUTO_TEMP(chan));
}
data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
| (adm1031_read_value(client, ADM1031_REG_STATUS(1))
<< 8);
if (data->chip_type == adm1030) {
data->alarm &= 0xc0ff;
}
for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
data->fan_div[chan] =
adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
data->fan_min[chan] =
adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
data->fan[chan] =
adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
data->pwm[chan] =
0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
(4*chan));
}
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
return data;
}
static int __init sensors_adm1031_init(void)
{
return i2c_add_driver(&adm1031_driver);
}
static void __exit sensors_adm1031_exit(void)
{
i2c_del_driver(&adm1031_driver);
}
MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
MODULE_LICENSE("GPL");
module_init(sensors_adm1031_init);
module_exit(sensors_adm1031_exit);
drivers/i2c/chips/lm75.c
View file @ 918953bc
...@@ -113,7 +113,7 @@ static int lm75_attach_adapter(struct i2c_adapter *adapter) ...@@ -113,7 +113,7 @@ static int lm75_attach_adapter(struct i2c_adapter *adapter)
/* This function is called by i2c_detect */ /* This function is called by i2c_detect */
static int lm75_detect(struct i2c_adapter *adapter, int address, int kind) static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
{ {
int i, cur, conf, hyst, os; int i;
struct i2c_client *new_client; struct i2c_client *new_client;
struct lm75_data *data; struct lm75_data *data;
int err = 0; int err = 0;
...@@ -149,16 +149,41 @@ static int lm75_detect(struct i2c_adapter *adapter, int address, int kind) ...@@ -149,16 +149,41 @@ static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
new_client->driver = &lm75_driver; new_client->driver = &lm75_driver;
new_client->flags = 0; new_client->flags = 0;
/* Now, we do the remaining detection. It is lousy. */ /* Now, we do the remaining detection. There is no identification-
dedicated register so we have to rely on several tricks:
unused bits, registers cycling over 8-address boundaries,
addresses 0x04-0x07 returning the last read value.
The cycling+unused addresses combination is not tested,
since it would significantly slow the detection down and would
hardly add any value. */
if (kind < 0) { if (kind < 0) {
int cur, conf, hyst, os;
/* Unused addresses */
cur = i2c_smbus_read_word_data(new_client, 0); cur = i2c_smbus_read_word_data(new_client, 0);
conf = i2c_smbus_read_byte_data(new_client, 1); conf = i2c_smbus_read_byte_data(new_client, 1);
hyst = i2c_smbus_read_word_data(new_client, 2); hyst = i2c_smbus_read_word_data(new_client, 2);
if (i2c_smbus_read_word_data(new_client, 4) != hyst
|| i2c_smbus_read_word_data(new_client, 5) != hyst
|| i2c_smbus_read_word_data(new_client, 6) != hyst
|| i2c_smbus_read_word_data(new_client, 7) != hyst)
goto exit_free;
os = i2c_smbus_read_word_data(new_client, 3); os = i2c_smbus_read_word_data(new_client, 3);
for (i = 0; i <= 0x1f; i++) if (i2c_smbus_read_word_data(new_client, 4) != os
if ((i2c_smbus_read_byte_data(new_client, i * 8 + 1) != conf) || || i2c_smbus_read_word_data(new_client, 5) != os
(i2c_smbus_read_word_data(new_client, i * 8 + 2) != hyst) || || i2c_smbus_read_word_data(new_client, 6) != os
(i2c_smbus_read_word_data(new_client, i * 8 + 3) != os)) || i2c_smbus_read_word_data(new_client, 7) != os)
goto exit_free;
/* Unused bits */
if (conf & 0xe0)
goto exit_free;
/* Addresses cycling */
for (i = 8; i < 0xff; i += 8)
if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
|| i2c_smbus_read_word_data(new_client, i + 2) != hyst
|| i2c_smbus_read_word_data(new_client, i + 3) != os)
goto exit_free; goto exit_free;
} }
......
drivers/i2c/chips/lm77.c 0 → 100644
View file @ 918953bc
/*
lm77.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 2004 Andras BALI <drewie@freemail.hu>
Heavily based on lm75.c by Frodo Looijaard <frodol@dds.nl>. The LM77
is a temperature sensor and thermal window comparator with 0.5 deg
resolution made by National Semiconductor. Complete datasheet can be
obtained at their site:
http://www.national.com/pf/LM/LM77.html
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { I2C_CLIENT_END };
static unsigned short normal_i2c_range[] = { 0x48, 0x4b, I2C_CLIENT_END };
static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
/* Insmod parameters */
SENSORS_INSMOD_1(lm77);
/* The LM77 registers */
#define LM77_REG_TEMP 0x00
#define LM77_REG_CONF 0x01
#define LM77_REG_TEMP_HYST 0x02
#define LM77_REG_TEMP_CRIT 0x03
#define LM77_REG_TEMP_MIN 0x04
#define LM77_REG_TEMP_MAX 0x05
/* Each client has this additional data */
struct lm77_data {
struct i2c_client client;
struct semaphore update_lock;
char valid;
unsigned long last_updated; /* In jiffies */
int temp_input; /* Temperatures */
int temp_crit;
int temp_min;
int temp_max;
int temp_hyst;
u8 alarms;
};
static int lm77_attach_adapter(struct i2c_adapter *adapter);
static int lm77_detect(struct i2c_adapter *adapter, int address, int kind);
static void lm77_init_client(struct i2c_client *client);
static int lm77_detach_client(struct i2c_client *client);
static u16 lm77_read_value(struct i2c_client *client, u8 reg);
static int lm77_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct lm77_data *lm77_update_device(struct device *dev);
/* This is the driver that will be inserted */
static struct i2c_driver lm77_driver = {
.owner = THIS_MODULE,
.name = "lm77",
.flags = I2C_DF_NOTIFY,
.attach_adapter = lm77_attach_adapter,
.detach_client = lm77_detach_client,
};
static int lm77_id = 0;
/* straight from the datasheet */
#define LM77_TEMP_MIN (-55000)
#define LM77_TEMP_MAX 125000
/* In the temperature registers, the low 3 bits are not part of the
temperature values; they are the status bits. */
static inline u16 LM77_TEMP_TO_REG(int temp)
{
int ntemp = SENSORS_LIMIT(temp, LM77_TEMP_MIN, LM77_TEMP_MAX);
return (u16)((ntemp / 500) * 8);
}
static inline int LM77_TEMP_FROM_REG(u16 reg)
{
return ((int)reg / 8) * 500;
}
/* sysfs stuff */
/* read routines for temperature limits */
#define show(value) \
static ssize_t show_##value(struct device *dev, char *buf) \
{ \
struct lm77_data *data = lm77_update_device(dev); \
return sprintf(buf, "%d\n", data->value); \
}
show(temp_input);
show(temp_crit);
show(temp_min);
show(temp_max);
show(alarms);
/* read routines for hysteresis values */
static ssize_t show_temp_crit_hyst(struct device *dev, char *buf)
{
struct lm77_data *data = lm77_update_device(dev);
return sprintf(buf, "%d\n", data->temp_crit - data->temp_hyst);
}
static ssize_t show_temp_min_hyst(struct device *dev, char *buf)
{
struct lm77_data *data = lm77_update_device(dev);
return sprintf(buf, "%d\n", data->temp_min + data->temp_hyst);
}
static ssize_t show_temp_max_hyst(struct device *dev, char *buf)
{
struct lm77_data *data = lm77_update_device(dev);
return sprintf(buf, "%d\n", data->temp_max - data->temp_hyst);
}
/* write routines */
#define set(value, reg) \
static ssize_t set_##value(struct device *dev, const char *buf, size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm77_data *data = i2c_get_clientdata(client); \
data->value = simple_strtoul(buf, NULL, 10); \
lm77_write_value(client, reg, LM77_TEMP_TO_REG(data->value)); \
return count; \
}
set(temp_min, LM77_REG_TEMP_MIN);
set(temp_max, LM77_REG_TEMP_MAX);
/* hysteresis is stored as a relative value on the chip, so it has to be
converted first */
static ssize_t set_temp_crit_hyst(struct device *dev, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm77_data *data = i2c_get_clientdata(client);
data->temp_hyst = data->temp_crit - simple_strtoul(buf, NULL, 10);
lm77_write_value(client, LM77_REG_TEMP_HYST,
LM77_TEMP_TO_REG(data->temp_hyst));
return count;
}
/* preserve hysteresis when setting T_crit */
static ssize_t set_temp_crit(struct device *dev, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm77_data *data = i2c_get_clientdata(client);
int oldcrithyst = data->temp_crit - data->temp_hyst;
data->temp_crit = simple_strtoul(buf, NULL, 10);
data->temp_hyst = data->temp_crit - oldcrithyst;
lm77_write_value(client, LM77_REG_TEMP_CRIT,
LM77_TEMP_TO_REG(data->temp_crit));
lm77_write_value(client, LM77_REG_TEMP_HYST,
LM77_TEMP_TO_REG(data->temp_hyst));
return count;
}
static DEVICE_ATTR(temp1_input, S_IRUGO,
show_temp_input, NULL);
static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO,
show_temp_crit, set_temp_crit);
static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
show_temp_min, set_temp_min);
static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
show_temp_max, set_temp_max);
static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
show_temp_crit_hyst, set_temp_crit_hyst);
static DEVICE_ATTR(temp1_min_hyst, S_IRUGO,
show_temp_min_hyst, NULL);
static DEVICE_ATTR(temp1_max_hyst, S_IRUGO,
show_temp_max_hyst, NULL);
static DEVICE_ATTR(alarms, S_IRUGO,
show_alarms, NULL);
static int lm77_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_detect(adapter, &addr_data, lm77_detect);
}
/* This function is called by i2c_detect */
static int lm77_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct lm77_data *data;
int err = 0;
const char *name = "";
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
goto exit;
/* OK. For now, we presume we have a valid client. We now create the
client structure, even though we cannot fill it completely yet.
But it allows us to access lm77_{read,write}_value. */
if (!(data = kmalloc(sizeof(struct lm77_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
memset(data, 0, sizeof(struct lm77_data));
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &lm77_driver;
new_client->flags = 0;
/* Here comes the remaining detection. Since the LM77 has no
register dedicated to identification, we have to rely on the
following tricks:
1. the high 4 bits represent the sign and thus they should
always be the same
2. the high 3 bits are unused in the configuration register
3. addresses 0x06 and 0x07 return the last read value
4. registers cycling over 8-address boundaries
Word-sized registers are high-byte first. */
if (kind < 0) {
int i, cur, conf, hyst, crit, min, max;
/* addresses cycling */
cur = i2c_smbus_read_word_data(new_client, 0);
conf = i2c_smbus_read_byte_data(new_client, 1);
hyst = i2c_smbus_read_word_data(new_client, 2);
crit = i2c_smbus_read_word_data(new_client, 3);
min = i2c_smbus_read_word_data(new_client, 4);
max = i2c_smbus_read_word_data(new_client, 5);
for (i = 8; i <= 0xff; i += 8)
if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
|| i2c_smbus_read_word_data(new_client, i + 2) != hyst
|| i2c_smbus_read_word_data(new_client, i + 3) != crit
|| i2c_smbus_read_word_data(new_client, i + 4) != min
|| i2c_smbus_read_word_data(new_client, i + 5) != max)
goto exit_free;
/* sign bits */
if (((cur & 0x00f0) != 0xf0 && (cur & 0x00f0) != 0x0)
|| ((hyst & 0x00f0) != 0xf0 && (hyst & 0x00f0) != 0x0)
|| ((crit & 0x00f0) != 0xf0 && (crit & 0x00f0) != 0x0)
|| ((min & 0x00f0) != 0xf0 && (min & 0x00f0) != 0x0)
|| ((max & 0x00f0) != 0xf0 && (max & 0x00f0) != 0x0))
goto exit_free;
/* unused bits */
if (conf & 0xe0)
goto exit_free;
/* 0x06 and 0x07 return the last read value */
cur = i2c_smbus_read_word_data(new_client, 0);
if (i2c_smbus_read_word_data(new_client, 6) != cur
|| i2c_smbus_read_word_data(new_client, 7) != cur)
goto exit_free;
hyst = i2c_smbus_read_word_data(new_client, 2);
if (i2c_smbus_read_word_data(new_client, 6) != hyst
|| i2c_smbus_read_word_data(new_client, 7) != hyst)
goto exit_free;
min = i2c_smbus_read_word_data(new_client, 4);
if (i2c_smbus_read_word_data(new_client, 6) != min
|| i2c_smbus_read_word_data(new_client, 7) != min)
goto exit_free;
}
/* Determine the chip type - only one kind supported! */
if (kind <= 0)
kind = lm77;
if (kind == lm77) {
name = "lm77";
}
/* Fill in the remaining client fields and put it into the global list */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
new_client->id = lm77_id++;
data->valid = 0;
init_MUTEX(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto exit_free;
/* Initialize the LM77 chip */
lm77_init_client(new_client);
/* Register sysfs hooks */
device_create_file(&new_client->dev, &dev_attr_temp1_input);
device_create_file(&new_client->dev, &dev_attr_temp1_crit);
device_create_file(&new_client->dev, &dev_attr_temp1_min);
device_create_file(&new_client->dev, &dev_attr_temp1_max);
device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst);
device_create_file(&new_client->dev, &dev_attr_temp1_min_hyst);
device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
device_create_file(&new_client->dev, &dev_attr_alarms);
return 0;
exit_free:
kfree(data);
exit:
return err;
}
static int lm77_detach_client(struct i2c_client *client)
{
i2c_detach_client(client);
kfree(i2c_get_clientdata(client));
return 0;
}
/* All registers are word-sized, except for the configuration register.
The LM77 uses the high-byte first convention. */
static u16 lm77_read_value(struct i2c_client *client, u8 reg)
{
if (reg == LM77_REG_CONF)
return i2c_smbus_read_byte_data(client, reg);
else
return swab16(i2c_smbus_read_word_data(client, reg));
}
static int lm77_write_value(struct i2c_client *client, u8 reg, u16 value)
{
if (reg == LM77_REG_CONF)
return i2c_smbus_write_byte_data(client, reg, value);
else
return i2c_smbus_write_word_data(client, reg, swab16(value));
}
static void lm77_init_client(struct i2c_client *client)
{
/* Initialize the LM77 chip - turn off shutdown mode */
int conf = lm77_read_value(client, LM77_REG_CONF);
if (conf & 1)
lm77_write_value(client, LM77_REG_CONF, conf & 0xfe);
}
static struct lm77_data *lm77_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm77_data *data = i2c_get_clientdata(client);
down(&data->update_lock);
if ((jiffies - data->last_updated > HZ + HZ / 2) ||
(jiffies < data->last_updated) || !data->valid) {
dev_dbg(&client->dev, "Starting lm77 update\n");
data->temp_input =
LM77_TEMP_FROM_REG(lm77_read_value(client,
LM77_REG_TEMP));
data->temp_hyst =
LM77_TEMP_FROM_REG(lm77_read_value(client,
LM77_REG_TEMP_HYST));
data->temp_crit =
LM77_TEMP_FROM_REG(lm77_read_value(client,
LM77_REG_TEMP_CRIT));
data->temp_min =
LM77_TEMP_FROM_REG(lm77_read_value(client,
LM77_REG_TEMP_MIN));
data->temp_max =
LM77_TEMP_FROM_REG(lm77_read_value(client,
LM77_REG_TEMP_MAX));
data->alarms =
lm77_read_value(client, LM77_REG_TEMP) & 0x0007;
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
return data;
}
static int __init sensors_lm77_init(void)
{
return i2c_add_driver(&lm77_driver);
}
static void __exit sensors_lm77_exit(void)
{
i2c_del_driver(&lm77_driver);
}
MODULE_AUTHOR("Andras BALI <drewie@freemail.hu>");
MODULE_DESCRIPTION("LM77 driver");
MODULE_LICENSE("GPL");
module_init(sensors_lm77_init);
module_exit(sensors_lm77_exit);
drivers/i2c/chips/lm78.c
View file @ 918953bc
...@@ -123,55 +123,6 @@ static inline u8 DIV_TO_REG(int val) ...@@ -123,55 +123,6 @@ static inline u8 DIV_TO_REG(int val)
} }
#define DIV_FROM_REG(val) (1 << (val)) #define DIV_FROM_REG(val) (1 << (val))
/* Initial limits. To keep them sane, we use the 'standard' translation as
specified in the LM78 sheet. Use the config file to set better limits. */
#define LM78_INIT_IN_0(vid) ((vid)==3500 ? 2800 : (vid))
#define LM78_INIT_IN_1(vid) ((vid)==3500 ? 2800 : (vid))
#define LM78_INIT_IN_2 3300
#define LM78_INIT_IN_3 (((5000) * 100)/168)
#define LM78_INIT_IN_4 (((12000) * 10)/38)
#define LM78_INIT_IN_5 (((-12000) * -604)/2100)
#define LM78_INIT_IN_6 (((-5000) * -604)/909)
#define LM78_INIT_IN_PERCENTAGE 10
#define LM78_INIT_IN_MIN_0(vid) (LM78_INIT_IN_0(vid) - \
LM78_INIT_IN_0(vid) * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_0(vid) (LM78_INIT_IN_0(vid) + \
LM78_INIT_IN_0(vid) * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MIN_1(vid) (LM78_INIT_IN_1(vid) - \
LM78_INIT_IN_1(vid) * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_1(vid) (LM78_INIT_IN_1(vid) + \
LM78_INIT_IN_1(vid) * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MIN_2 \
(LM78_INIT_IN_2 - LM78_INIT_IN_2 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_2 \
(LM78_INIT_IN_2 + LM78_INIT_IN_2 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MIN_3 \
(LM78_INIT_IN_3 - LM78_INIT_IN_3 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_3 \
(LM78_INIT_IN_3 + LM78_INIT_IN_3 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MIN_4 \
(LM78_INIT_IN_4 - LM78_INIT_IN_4 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_4 \
(LM78_INIT_IN_4 + LM78_INIT_IN_4 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MIN_5 \
(LM78_INIT_IN_5 - LM78_INIT_IN_5 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_5 \
(LM78_INIT_IN_5 + LM78_INIT_IN_5 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MIN_6 \
(LM78_INIT_IN_6 - LM78_INIT_IN_6 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_IN_MAX_6 \
(LM78_INIT_IN_6 + LM78_INIT_IN_6 * LM78_INIT_IN_PERCENTAGE / 100)
#define LM78_INIT_FAN_MIN_1 3000
#define LM78_INIT_FAN_MIN_2 3000
#define LM78_INIT_FAN_MIN_3 3000
#define LM78_INIT_TEMP_OVER 60000
#define LM78_INIT_TEMP_HYST 50000
/* There are some complications in a module like this. First off, LM78 chips /* There are some complications in a module like this. First off, LM78 chips
may be both present on the SMBus and the ISA bus, and we have to handle may be both present on the SMBus and the ISA bus, and we have to handle
those cases separately at some places. Second, there might be several those cases separately at some places. Second, there might be several
...@@ -756,45 +707,6 @@ static void lm78_init_client(struct i2c_client *client) ...@@ -756,45 +707,6 @@ static void lm78_init_client(struct i2c_client *client)
vid |= 0x10; vid |= 0x10;
vid = VID_FROM_REG(vid); vid = VID_FROM_REG(vid);
lm78_write_value(client, LM78_REG_IN_MIN(0),
IN_TO_REG(LM78_INIT_IN_MIN_0(vid)));
lm78_write_value(client, LM78_REG_IN_MAX(0),
IN_TO_REG(LM78_INIT_IN_MAX_0(vid)));
lm78_write_value(client, LM78_REG_IN_MIN(1),
IN_TO_REG(LM78_INIT_IN_MIN_1(vid)));
lm78_write_value(client, LM78_REG_IN_MAX(1),
IN_TO_REG(LM78_INIT_IN_MAX_1(vid)));
lm78_write_value(client, LM78_REG_IN_MIN(2),
IN_TO_REG(LM78_INIT_IN_MIN_2));
lm78_write_value(client, LM78_REG_IN_MAX(2),
IN_TO_REG(LM78_INIT_IN_MAX_2));
lm78_write_value(client, LM78_REG_IN_MIN(3),
IN_TO_REG(LM78_INIT_IN_MIN_3));
lm78_write_value(client, LM78_REG_IN_MAX(3),
IN_TO_REG(LM78_INIT_IN_MAX_3));
lm78_write_value(client, LM78_REG_IN_MIN(4),
IN_TO_REG(LM78_INIT_IN_MIN_4));
lm78_write_value(client, LM78_REG_IN_MAX(4),
IN_TO_REG(LM78_INIT_IN_MAX_4));
lm78_write_value(client, LM78_REG_IN_MIN(5),
IN_TO_REG(LM78_INIT_IN_MIN_5));
lm78_write_value(client, LM78_REG_IN_MAX(5),
IN_TO_REG(LM78_INIT_IN_MAX_5));
lm78_write_value(client, LM78_REG_IN_MIN(6),
IN_TO_REG(LM78_INIT_IN_MIN_6));
lm78_write_value(client, LM78_REG_IN_MAX(6),
IN_TO_REG(LM78_INIT_IN_MAX_6));
lm78_write_value(client, LM78_REG_FAN_MIN(0),
FAN_TO_REG(LM78_INIT_FAN_MIN_1, 2));
lm78_write_value(client, LM78_REG_FAN_MIN(1),
FAN_TO_REG(LM78_INIT_FAN_MIN_2, 2));
lm78_write_value(client, LM78_REG_FAN_MIN(2),
FAN_TO_REG(LM78_INIT_FAN_MIN_3, 2));
lm78_write_value(client, LM78_REG_TEMP_OVER,
TEMP_TO_REG(LM78_INIT_TEMP_OVER));
lm78_write_value(client, LM78_REG_TEMP_HYST,
TEMP_TO_REG(LM78_INIT_TEMP_HYST));
/* Start monitoring */ /* Start monitoring */
lm78_write_value(client, LM78_REG_CONFIG, lm78_write_value(client, LM78_REG_CONFIG,
(lm78_read_value(client, LM78_REG_CONFIG) & 0xf7) (lm78_read_value(client, LM78_REG_CONFIG) & 0xf7)
......
drivers/i2c/chips/lm90.c
View file @ 918953bc
...@@ -21,11 +21,26 @@ ...@@ -21,11 +21,26 @@
* http://www.national.com/pf/LM/LM99.html * http://www.national.com/pf/LM/LM99.html
* Note that there is no way to differenciate between both chips. * Note that there is no way to differenciate between both chips.
* *
* This driver also supports the LM86, another sensor chip made by
* National Semiconductor. It is exactly similar to the LM90 except it
* has a higher accuracy.
* Complete datasheet can be obtained from National's website at:
* http://www.national.com/pf/LM/LM86.html
*
* This driver also supports the ADM1032, a sensor chip made by Analog * This driver also supports the ADM1032, a sensor chip made by Analog
* Devices. That chip is similar to the LM90, with a few differences * Devices. That chip is similar to the LM90, with a few differences
* that are not handled by this driver. Complete datasheet can be * that are not handled by this driver. Complete datasheet can be
* obtained from Analog's website at: * obtained from Analog's website at:
* http://products.analog.com/products/info.asp?product=ADM1032 * http://products.analog.com/products/info.asp?product=ADM1032
* Among others, it has a higher accuracy than the LM90, much like the
* LM86 does.
*
* This driver also supports the MAX6657 and MAX6658, sensor chips made
* by Maxim. These chips are similar to the LM86. Complete datasheet
* can be obtained at Maxim's website at:
* http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
* Note that there is no way to differenciate between both chips (but
* no need either).
* *
* Since the LM90 was the first chipset supported by this driver, most * Since the LM90 was the first chipset supported by this driver, most
* comments will refer to this chipset, but are actually general and * comments will refer to this chipset, but are actually general and
...@@ -56,7 +71,7 @@ ...@@ -56,7 +71,7 @@
/* /*
* Addresses to scan * Addresses to scan
* Address is fully defined internally and cannot be changed. * Address is fully defined internally and cannot be changed.
* LM89, LM90, LM99 and ADM1032 have address 0x4c. * LM86, LM89, LM90, LM99, ADM1032, MAX6657 and MAX6658 have address 0x4c.
* LM89-1, and LM99-1 have address 0x4d. * LM89-1, and LM99-1 have address 0x4d.
*/ */
...@@ -69,7 +84,7 @@ static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END }; ...@@ -69,7 +84,7 @@ static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
* Insmod parameters * Insmod parameters
*/ */
SENSORS_INSMOD_3(lm90, adm1032, lm99); SENSORS_INSMOD_5(lm90, adm1032, lm99, lm86, max6657);
/* /*
* The LM90 registers * The LM90 registers
...@@ -289,7 +304,6 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) ...@@ -289,7 +304,6 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
struct lm90_data *data; struct lm90_data *data;
int err = 0; int err = 0;
const char *name = ""; const char *name = "";
u8 reg_config1=0, reg_convrate=0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit; goto exit;
...@@ -319,28 +333,22 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) ...@@ -319,28 +333,22 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
* requested, so both the detection and the identification steps * requested, so both the detection and the identification steps
* are skipped. * are skipped.
*/ */
if (kind < 0) { /* detection */
reg_config1 = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONFIG1);
reg_convrate = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONVRATE);
if ((reg_config1 & 0x2A) != 0x00 /* Default to an LM90 if forced */
|| reg_convrate > 0x0A) { if (kind == 0)
dev_dbg(&adapter->dev, kind = lm90;
"LM90 detection failed at 0x%02x.\n",
address);
goto exit_free;
}
}
if (kind <= 0) { /* identification */ if (kind < 0) { /* detection and identification */
u8 man_id, chip_id; u8 man_id, chip_id, reg_config1, reg_convrate;
man_id = i2c_smbus_read_byte_data(new_client, man_id = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_MAN_ID); LM90_REG_R_MAN_ID);
chip_id = i2c_smbus_read_byte_data(new_client, chip_id = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CHIP_ID); LM90_REG_R_CHIP_ID);
reg_config1 = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONFIG1);
reg_convrate = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONVRATE);
if (man_id == 0x01) { /* National Semiconductor */ if (man_id == 0x01) { /* National Semiconductor */
u8 reg_config2; u8 reg_config2;
...@@ -348,25 +356,36 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) ...@@ -348,25 +356,36 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
reg_config2 = i2c_smbus_read_byte_data(new_client, reg_config2 = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONFIG2); LM90_REG_R_CONFIG2);
if (kind == 0 /* skip detection */ if ((reg_config1 & 0x2A) == 0x00
|| ((reg_config2 & 0xF8) == 0x00 && (reg_config2 & 0xF8) == 0x00
&& reg_convrate <= 0x09)) { && reg_convrate <= 0x09) {
if (address == 0x4C if (address == 0x4C
&& (chip_id & 0xF0) == 0x20) { /* LM90 */ && (chip_id & 0xF0) == 0x20) { /* LM90 */
kind = lm90; kind = lm90;
} else } else
if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */ if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
kind = lm99; kind = lm99;
} else
if (address == 0x4C
&& (chip_id & 0xF0) == 0x10) { /* LM86 */
kind = lm86;
} }
} }
} else } else
if (man_id == 0x41) { /* Analog Devices */ if (man_id == 0x41) { /* Analog Devices */
if (address == 0x4C if (address == 0x4C
&& (chip_id & 0xF0) == 0x40 /* ADM1032 */ && (chip_id & 0xF0) == 0x40 /* ADM1032 */
&& (kind == 0 /* skip detection */ && (reg_config1 & 0x3F) == 0x00
|| (reg_config1 & 0x3F) == 0x00)) { && reg_convrate <= 0x0A) {
kind = adm1032; kind = adm1032;
} }
} else
if (man_id == 0x4D) { /* Maxim */
if (address == 0x4C
&& (reg_config1 & 0x1F) == 0
&& reg_convrate <= 0x09) {
kind = max6657;
}
} }
if (kind <= 0) { /* identification failed */ if (kind <= 0) { /* identification failed */
...@@ -383,6 +402,10 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind) ...@@ -383,6 +402,10 @@ static int lm90_detect(struct i2c_adapter *adapter, int address, int kind)
name = "adm1032"; name = "adm1032";
} else if (kind == lm99) { } else if (kind == lm99) {
name = "lm99"; name = "lm99";
} else if (kind == lm86) {
name = "lm86";
} else if (kind == max6657) {
name = "max6657";
} }
/* We can fill in the remaining client fields */ /* We can fill in the remaining client fields */
......
drivers/i2c/i2c-dev.c
View file @ 918953bc
...@@ -518,20 +518,29 @@ static int __init i2c_dev_init(void) ...@@ -518,20 +518,29 @@ static int __init i2c_dev_init(void)
printk(KERN_INFO "i2c /dev entries driver\n"); printk(KERN_INFO "i2c /dev entries driver\n");
if (register_chrdev(I2C_MAJOR,"i2c",&i2cdev_fops)) { res = register_chrdev(I2C_MAJOR, "i2c", &i2cdev_fops);
printk(KERN_ERR "i2c-dev.o: unable to get major %d for i2c bus\n", if (res)
I2C_MAJOR); goto out;
return -EIO;
} res = class_register(&i2c_dev_class);
if (res)
goto out_unreg_chrdev;
res = i2c_add_driver(&i2cdev_driver);
if (res)
goto out_unreg_class;
devfs_mk_dir("i2c"); devfs_mk_dir("i2c");
class_register(&i2c_dev_class);
if ((res = i2c_add_driver(&i2cdev_driver))) {
printk(KERN_ERR "i2c-dev.o: Driver registration failed, module not inserted.\n");
devfs_remove("i2c");
unregister_chrdev(I2C_MAJOR,"i2c");
return res;
}
return 0; return 0;
out_unreg_class:
class_unregister(&i2c_dev_class);
out_unreg_chrdev:
unregister_chrdev(I2C_MAJOR, "i2c");
out:
printk(KERN_ERR "%s: Driver Initialisation failed", __FILE__);
return res;
} }
static void __exit i2c_dev_exit(void) static void __exit i2c_dev_exit(void)
......
drivers/pci/quirks.c
View file @ 918953bc
...@@ -694,29 +694,38 @@ static int __initdata asus_hides_smbus = 0; ...@@ -694,29 +694,38 @@ static int __initdata asus_hides_smbus = 0;
static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev) static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
{ {
if (likely(dev->subsystem_vendor != PCI_VENDOR_ID_ASUSTEK)) if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
return; if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB)
switch(dev->subsystem_device) {
if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB) case 0x8070: /* P4B */
switch(dev->subsystem_device) { case 0x8088: /* P4B533 */
case 0x8070: /* P4B */ asus_hides_smbus = 1;
case 0x8088: /* P4B533 */ }
asus_hides_smbus = 1; if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB)
} switch(dev->subsystem_device) {
if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) case 0x80b1: /* P4GE-V */
switch(dev->subsystem_device) { case 0x80b2: /* P4PE */
case 0x80b1: /* P4GE-V */ case 0x8093: /* P4B533-V */
case 0x80b2: /* P4PE */ asus_hides_smbus = 1;
case 0x8093: /* P4B533-V */ }
asus_hides_smbus = 1; if (dev->device == PCI_DEVICE_ID_INTEL_82850_HB)
} switch(dev->subsystem_device) {
if ((dev->device == PCI_DEVICE_ID_INTEL_82850_HB) && case 0x8030: /* P4T533 */
(dev->subsystem_device == 0x8030)) /* P4T533 */ asus_hides_smbus = 1;
asus_hides_smbus = 1; }
if ((dev->device == PCI_DEVICE_ID_INTEL_7205_0) && if (dev->device == PCI_DEVICE_ID_INTEL_7205_0)
(dev->subsystem_device == 0x8070)) /* P4G8X Deluxe */ switch (dev->subsystem_device) {
asus_hides_smbus = 1; case 0x8070: /* P4G8X Deluxe */
return; asus_hides_smbus = 1;
}
} else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
switch(dev->subsystem_device) {
case 0x088C: /* HP Compaq nc8000 */
case 0x0890: /* HP Compaq nc6000 */
asus_hides_smbus = 1;
}
}
} }
static void __init asus_hides_smbus_lpc(struct pci_dev *dev) static void __init asus_hides_smbus_lpc(struct pci_dev *dev)
...@@ -1004,13 +1013,16 @@ static struct pci_fixup pci_fixups[] __devinitdata = { ...@@ -1004,13 +1013,16 @@ static struct pci_fixup pci_fixups[] __devinitdata = {
/* /*
* on Asus P4B boards, the i801SMBus device is disabled at startup. * on Asus P4B boards, the i801SMBus device is disabled at startup.
* this also goes for boards in HP Compaq nc6000 and nc8000 notebooks.
*/ */
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845_HB, asus_hides_smbus_hostbridge }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845_HB, asus_hides_smbus_hostbridge },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845G_HB, asus_hides_smbus_hostbridge }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845G_HB, asus_hides_smbus_hostbridge },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82850_HB, asus_hides_smbus_hostbridge }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82850_HB, asus_hides_smbus_hostbridge },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_7205_0, asus_hides_smbus_hostbridge }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_7205_0, asus_hides_smbus_hostbridge },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855PM_HB, asus_hides_smbus_hostbridge },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, asus_hides_smbus_lpc }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, asus_hides_smbus_lpc },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, asus_hides_smbus_lpc }, { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, asus_hides_smbus_lpc },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, asus_hides_smbus_lpc },
#ifdef CONFIG_SCSI_SATA #ifdef CONFIG_SCSI_SATA
/* Fixup BIOSes that configure Parallel ATA (PATA / IDE) and /* Fixup BIOSes that configure Parallel ATA (PATA / IDE) and
......
drivers/w1/Kconfig 0 → 100644
View file @ 918953bc
menu "Dallas's 1-wire bus"
config W1
tristate "Dallas's 1-wire support"
---help---
Dallas's 1-wire bus is usefull to connect slow 1-pin devices
such as iButtons and thermal sensors.
If you want W1 support, you should say Y here.
This W1 support can also be built as a module. If so, the module
will be called wire.ko.
config W1_MATROX
tristate "Matrox G400 transport layer for 1-wire"
depends on W1
help
Say Y here if you want to communicate with your 1-wire devices
using Matrox's G400 GPIO pins.
This support is also available as a module. If so, the module
will be called matrox_w1.ko.
config W1_THERM
tristate "Thermal family implementation"
depends on W1
help
Say Y here if you want to connect 1-wire thermal sensors to you
wire.
endmenu
drivers/w1/Makefile 0 → 100644
View file @ 918953bc
#
# Makefile for the Dallas's 1-wire bus.
#
obj-$(CONFIG_W1) += wire.o
wire-objs := w1.o w1_int.o w1_family.o w1_netlink.o w1_io.o
obj-$(CONFIG_W1_MATROX) += matrox_w1.o
obj-$(CONFIG_W1_THERM) += w1_therm.o
drivers/w1/matrox_w1.c 0 → 100644
View file @ 918953bc
/*
* matrox_w1.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/atomic.h>
#include <asm/types.h>
#include <asm/io.h>
#include <asm/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/pci_ids.h>
#include <linux/pci.h>
#include <linux/timer.h>
#include "w1.h"
#include "w1_int.h"
#include "w1_log.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
MODULE_DESCRIPTION("Driver for transport(Dallas 1-wire prtocol) over VGA DDC(matrox gpio).");
static struct pci_device_id matrox_w1_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400) },
{ },
};
MODULE_DEVICE_TABLE(pci, matrox_w1_tbl);
static int __devinit matrox_w1_probe(struct pci_dev *, const struct pci_device_id *);
static void __devexit matrox_w1_remove(struct pci_dev *);
static struct pci_driver matrox_w1_pci_driver = {
.name = "matrox_w1",
.id_table = matrox_w1_tbl,
.probe = matrox_w1_probe,
.remove = __devexit_p(matrox_w1_remove),
};
/*
* Matrox G400 DDC registers.
*/
#define MATROX_G400_DDC_CLK (1<<4)
#define MATROX_G400_DDC_DATA (1<<1)
#define MATROX_BASE 0x3C00
#define MATROX_STATUS 0x1e14
#define MATROX_PORT_INDEX_OFFSET 0x00
#define MATROX_PORT_DATA_OFFSET 0x0A
#define MATROX_GET_CONTROL 0x2A
#define MATROX_GET_DATA 0x2B
#define MATROX_CURSOR_CTL 0x06
struct matrox_device
{
unsigned long base_addr;
unsigned long port_index, port_data;
u8 data_mask;
unsigned long phys_addr, virt_addr;
unsigned long found;
struct w1_bus_master *bus_master;
};
static u8 matrox_w1_read_ddc_bit(unsigned long);
static void matrox_w1_write_ddc_bit(unsigned long, u8);
/*
* These functions read and write DDC Data bit.
*
* Using tristate pins, since i can't fin any open-drain pin in whole motherboard.
* Unfortunately we can't connect to Intel's 82801xx IO controller
* since we don't know motherboard schema, wich has pretty unused(may be not) GPIO.
*
* I've heard that PIIX also has open drain pin.
*
* Port mapping.
*/
static __inline__ u8 matrox_w1_read_reg(struct matrox_device *dev, u8 reg)
{
u8 ret;
writeb(reg, dev->port_index);
ret = readb(dev->port_data);
barrier();
return ret;
}
static __inline__ void matrox_w1_write_reg(struct matrox_device *dev, u8 reg, u8 val)
{
writeb(reg, dev->port_index);
writeb(val, dev->port_data);
wmb();
}
static void matrox_w1_write_ddc_bit(unsigned long data, u8 bit)
{
u8 ret;
struct matrox_device *dev = (struct matrox_device *) data;
if (bit)
bit = 0;
else
bit = dev->data_mask;
ret = matrox_w1_read_reg(dev, MATROX_GET_CONTROL);
matrox_w1_write_reg(dev, MATROX_GET_CONTROL, ((ret & ~dev->data_mask) | bit));
matrox_w1_write_reg(dev, MATROX_GET_DATA, 0x00);
}
static u8 matrox_w1_read_ddc_bit(unsigned long data)
{
u8 ret;
struct matrox_device *dev = (struct matrox_device *) data;
ret = matrox_w1_read_reg(dev, MATROX_GET_DATA);
return ret;
}
static void matrox_w1_hw_init(struct matrox_device *dev)
{
matrox_w1_write_reg(dev, MATROX_GET_DATA, 0xFF);
matrox_w1_write_reg(dev, MATROX_GET_CONTROL, 0x00);
}
static int __devinit matrox_w1_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct matrox_device *dev;
int err;
assert(pdev != NULL);
assert(ent != NULL);
if (pdev->vendor != PCI_VENDOR_ID_MATROX || pdev->device != PCI_DEVICE_ID_MATROX_G400)
return -ENODEV;
dev = kmalloc(sizeof(struct matrox_device) +
sizeof(struct w1_bus_master), GFP_KERNEL);
if (!dev) {
dev_err(&pdev->dev,
"%s: Failed to create new matrox_device object.\n",
__func__);
return -ENOMEM;
}
memset(dev, 0, sizeof(struct matrox_device) + sizeof(struct w1_bus_master));
dev->bus_master = (struct w1_bus_master *)(dev + 1);
/*
* True for G400, for some other we need resource 0, see drivers/video/matrox/matroxfb_base.c
*/
dev->phys_addr = pci_resource_start(pdev, 1);
dev->virt_addr =
(unsigned long) ioremap_nocache(dev->phys_addr, 16384);
if (!dev->virt_addr) {
dev_err(&pdev->dev, "%s: failed to ioremap(0x%lx, %d).\n",
__func__, dev->phys_addr, 16384);
err = -EIO;
goto err_out_free_device;
}
dev->base_addr = dev->virt_addr + MATROX_BASE;
dev->port_index = dev->base_addr + MATROX_PORT_INDEX_OFFSET;
dev->port_data = dev->base_addr + MATROX_PORT_DATA_OFFSET;
dev->data_mask = (MATROX_G400_DDC_DATA);
matrox_w1_hw_init(dev);
dev->bus_master->data = (unsigned long) dev;
dev->bus_master->read_bit = &matrox_w1_read_ddc_bit;
dev->bus_master->write_bit = &matrox_w1_write_ddc_bit;
err = w1_add_master_device(dev->bus_master);
if (err)
goto err_out_free_device;
pci_set_drvdata(pdev, dev);
dev->found = 1;
dev_info(&pdev->dev, "Matrox G400 GPIO transport layer for 1-wire.\n");
return 0;
err_out_free_device:
kfree(dev);
return err;
}
static void __devexit matrox_w1_remove(struct pci_dev *pdev)
{
struct matrox_device *dev = pci_get_drvdata(pdev);
assert(dev != NULL);
if (dev->found) {
w1_remove_master_device(dev->bus_master);
iounmap((void *) dev->virt_addr);
}
kfree(dev);
}
static int __init matrox_w1_init(void)
{
return pci_module_init(&matrox_w1_pci_driver);
}
static void __exit matrox_w1_fini(void)
{
pci_unregister_driver(&matrox_w1_pci_driver);
}
module_init(matrox_w1_init);
module_exit(matrox_w1_fini);
drivers/w1/w1.c 0 → 100644
View file @ 918953bc
/*
* w1.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/atomic.h>
#include <asm/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/suspend.h>
#include "w1.h"
#include "w1_io.h"
#include "w1_log.h"
#include "w1_int.h"
#include "w1_family.h"
#include "w1_netlink.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol.");
static int w1_timeout = 5 * HZ;
int w1_max_slave_count = 10;
module_param_named(timeout, w1_timeout, int, 0);
module_param_named(max_slave_count, w1_max_slave_count, int, 0);
spinlock_t w1_mlock = SPIN_LOCK_UNLOCKED;
LIST_HEAD(w1_masters);
static pid_t control_thread;
static int control_needs_exit;
static DECLARE_COMPLETION(w1_control_complete);
static DECLARE_WAIT_QUEUE_HEAD(w1_control_wait);
static int w1_master_match(struct device *dev, struct device_driver *drv)
{
return 1;
}
static int w1_master_probe(struct device *dev)
{
return -ENODEV;
}
static int w1_master_remove(struct device *dev)
{
return 0;
}
static void w1_master_release(struct device *dev)
{
struct w1_master *md = container_of(dev, struct w1_master, dev);
complete(&md->dev_released);
}
static void w1_slave_release(struct device *dev)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
complete(&sl->dev_released);
}
static ssize_t w1_default_read_name(struct device *dev, char *buf)
{
return sprintf(buf, "No family registered.\n");
}
static ssize_t w1_default_read_bin(struct kobject *kobj, char *buf, loff_t off,
size_t count)
{
return sprintf(buf, "No family registered.\n");
}
struct bus_type w1_bus_type = {
.name = "w1",
.match = w1_master_match,
};
struct device_driver w1_driver = {
.name = "w1_driver",
.bus = &w1_bus_type,
.probe = w1_master_probe,
.remove = w1_master_remove,
};
struct device w1_device = {
.parent = NULL,
.bus = &w1_bus_type,
.bus_id = "w1 bus master",
.driver = &w1_driver,
.release = &w1_master_release
};
static struct device_attribute w1_slave_attribute = {
.attr = {
.name = "name",
.mode = S_IRUGO,
.owner = THIS_MODULE
},
.show = &w1_default_read_name,
};
static struct device_attribute w1_slave_attribute_val = {
.attr = {
.name = "value",
.mode = S_IRUGO,
.owner = THIS_MODULE
},
.show = &w1_default_read_name,
};
static ssize_t w1_master_attribute_show(struct device *dev, char *buf)
{
return sprintf(buf, "please fix me\n");
#if 0
struct w1_master *md = container_of(dev, struct w1_master, dev);
int c = PAGE_SIZE;
if (down_interruptible(&md->mutex))
return -EBUSY;
c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", md->name);
c -= snprintf(buf + PAGE_SIZE - c, c,
"bus_master=0x%p, timeout=%d, max_slave_count=%d, attempts=%lu\n",
md->bus_master, w1_timeout, md->max_slave_count,
md->attempts);
c -= snprintf(buf + PAGE_SIZE - c, c, "%d slaves: ",
md->slave_count);
if (md->slave_count == 0)
c -= snprintf(buf + PAGE_SIZE - c, c, "no.\n");
else {
struct list_head *ent, *n;
struct w1_slave *sl;
list_for_each_safe(ent, n, &md->slist) {
sl = list_entry(ent, struct w1_slave, w1_slave_entry);
c -= snprintf(buf + PAGE_SIZE - c, c, "%s[%p] ",
sl->name, sl);
}
c -= snprintf(buf + PAGE_SIZE - c, c, "\n");
}
up(&md->mutex);
return PAGE_SIZE - c;
#endif
}
struct device_attribute w1_master_attribute = {
.attr = {
.name = "w1_master_stats",
.mode = S_IRUGO,
.owner = THIS_MODULE,
},
.show = &w1_master_attribute_show,
};
static struct bin_attribute w1_slave_bin_attribute = {
.attr = {
.name = "w1_slave",
.mode = S_IRUGO,
.owner = THIS_MODULE,
},
.size = W1_SLAVE_DATA_SIZE,
.read = &w1_default_read_bin,
};
static int __w1_attach_slave_device(struct w1_slave *sl)
{
int err;
sl->dev.parent = &sl->master->dev;
sl->dev.driver = sl->master->driver;
sl->dev.bus = &w1_bus_type;
sl->dev.release = &w1_slave_release;
snprintf(&sl->dev.bus_id[0], sizeof(sl->dev.bus_id),
"%x-%llx",
(unsigned int) sl->reg_num.family,
(unsigned long long) sl->reg_num.id);
snprintf (&sl->name[0], sizeof(sl->name),
"%x-%llx",
(unsigned int) sl->reg_num.family,
(unsigned long long) sl->reg_num.id);
dev_dbg(&sl->dev, "%s: registering %s.\n", __func__,
&sl->dev.bus_id[0]);
err = device_register(&sl->dev);
if (err < 0) {
dev_err(&sl->dev,
"Device registration [%s] failed. err=%d\n",
sl->dev.bus_id, err);
return err;
}
w1_slave_bin_attribute.read = sl->family->fops->rbin;
w1_slave_attribute.show = sl->family->fops->rname;
w1_slave_attribute_val.show = sl->family->fops->rval;
w1_slave_attribute_val.attr.name = sl->family->fops->rvalname;
err = device_create_file(&sl->dev, &w1_slave_attribute);
if (err < 0) {
dev_err(&sl->dev,
"sysfs file creation for [%s] failed. err=%d\n",
sl->dev.bus_id, err);
device_unregister(&sl->dev);
return err;
}
err = device_create_file(&sl->dev, &w1_slave_attribute_val);
if (err < 0) {
dev_err(&sl->dev,
"sysfs file creation for [%s] failed. err=%d\n",
sl->dev.bus_id, err);
device_remove_file(&sl->dev, &w1_slave_attribute);
device_unregister(&sl->dev);
return err;
}
err = sysfs_create_bin_file(&sl->dev.kobj, &w1_slave_bin_attribute);
if (err < 0) {
dev_err(&sl->dev,
"sysfs file creation for [%s] failed. err=%d\n",
sl->dev.bus_id, err);
device_remove_file(&sl->dev, &w1_slave_attribute);
device_remove_file(&sl->dev, &w1_slave_attribute_val);
device_unregister(&sl->dev);
return err;
}
list_add_tail(&sl->w1_slave_entry, &sl->master->slist);
return 0;
}
static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn)
{
struct w1_slave *sl;
struct w1_family *f;
int err;
sl = kmalloc(sizeof(struct w1_slave), GFP_KERNEL);
if (!sl) {
dev_err(&dev->dev,
"%s: failed to allocate new slave device.\n",
__func__);
return -ENOMEM;
}
memset(sl, 0, sizeof(*sl));
sl->owner = THIS_MODULE;
sl->master = dev;
memcpy(&sl->reg_num, rn, sizeof(sl->reg_num));
atomic_set(&sl->refcnt, 0);
init_completion(&sl->dev_released);
spin_lock(&w1_flock);
f = w1_family_registered(rn->family);
if (!f) {
spin_unlock(&w1_flock);
dev_info(&dev->dev, "Family %x is not registered.\n",
rn->family);
kfree(sl);
return -ENODEV;
}
__w1_family_get(f);
spin_unlock(&w1_flock);
sl->family = f;
err = __w1_attach_slave_device(sl);
if (err < 0) {
dev_err(&dev->dev, "%s: Attaching %s failed.\n", __func__,
sl->name);
w1_family_put(sl->family);
kfree(sl);
return err;
}
dev->slave_count++;
return 0;
}
static void w1_slave_detach(struct w1_slave *sl)
{
dev_info(&sl->dev, "%s: detaching %s.\n", __func__, sl->name);
while (atomic_read(&sl->refcnt))
schedule_timeout(10);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_slave_bin_attribute);
device_remove_file(&sl->dev, &w1_slave_attribute);
device_unregister(&sl->dev);
w1_family_put(sl->family);
}
static void w1_search(struct w1_master *dev)
{
u64 last, rn, tmp;
int i, count = 0, slave_count;
int last_family_desc, last_zero, last_device;
int search_bit, id_bit, comp_bit, desc_bit;
struct list_head *ent;
struct w1_slave *sl;
int family_found = 0;
struct w1_netlink_msg msg;
dev->attempts++;
memset(&msg, 0, sizeof(msg));
search_bit = id_bit = comp_bit = 0;
rn = tmp = last = 0;
last_device = last_zero = last_family_desc = 0;
desc_bit = 64;
while (!(id_bit && comp_bit) && !last_device
&& count++ < dev->max_slave_count) {
last = rn;
rn = 0;
last_family_desc = 0;
/*
* Reset bus and all 1-wire device state machines
* so they can respond to our requests.
*
* Return 0 - device(s) present, 1 - no devices present.
*/
if (w1_reset_bus(dev)) {
dev_info(&dev->dev, "No devices present on the wire.\n");
break;
}
#if 1
memset(&msg, 0, sizeof(msg));
w1_write_8(dev, W1_SEARCH);
for (i = 0; i < 64; ++i) {
/*
* Read 2 bits from bus.
* All who don't sleep must send ID bit and COMPLEMENT ID bit.
* They actually are ANDed between all senders.
*/
id_bit = w1_read_bit(dev);
comp_bit = w1_read_bit(dev);
if (id_bit && comp_bit)
break;
if (id_bit == 0 && comp_bit == 0) {
if (i == desc_bit)
search_bit = 1;
else if (i > desc_bit)
search_bit = 0;
else
search_bit = ((last >> i) & 0x1);
if (search_bit == 0) {
last_zero = i;
if (last_zero < 9)
last_family_desc = last_zero;
}
}
else
search_bit = id_bit;
tmp = search_bit;
rn |= (tmp << i);
/*
* Write 1 bit to bus
* and make all who don't have "search_bit" in "i"'th position
* in it's registration number sleep.
*/
w1_write_bit(dev, search_bit);
}
#endif
msg.id.w1_id = rn;
msg.val = w1_calc_crc8((u8 *) & rn, 7);
w1_netlink_send(dev, &msg);
if (desc_bit == last_zero)
last_device = 1;
desc_bit = last_zero;
slave_count = 0;
list_for_each(ent, &dev->slist) {
struct w1_reg_num *tmp;
tmp = (struct w1_reg_num *) &rn;
sl = list_entry(ent, struct w1_slave, w1_slave_entry);
if (sl->reg_num.family == tmp->family &&
sl->reg_num.id == tmp->id &&
sl->reg_num.crc == tmp->crc)
break;
else if (sl->reg_num.family == tmp->family) {
family_found = 1;
break;
}
slave_count++;
}
if (slave_count == dev->slave_count &&
msg.val && (*((__u8 *) & msg.val) == msg.id.id.crc)) {
w1_attach_slave_device(dev, (struct w1_reg_num *) &rn);
}
}
}
int w1_control(void *data)
{
struct w1_slave *sl;
struct w1_master *dev;
struct list_head *ent, *ment, *n, *mn;
int err, have_to_wait = 0, timeout;
daemonize("w1_control");
allow_signal(SIGTERM);
while (!control_needs_exit || have_to_wait) {
have_to_wait = 0;
timeout = w1_timeout;
do {
timeout = interruptible_sleep_on_timeout(&w1_control_wait, timeout);
if (current->flags & PF_FREEZE)
refrigerator(PF_FREEZE);
} while (!signal_pending(current) && (timeout > 0));
if (signal_pending(current))
flush_signals(current);
list_for_each_safe(ment, mn, &w1_masters) {
dev = list_entry(ment, struct w1_master, w1_master_entry);
if (!control_needs_exit && !dev->need_exit)
continue;
/*
* Little race: we can create thread but not set the flag.
* Get a chance for external process to set flag up.
*/
if (!dev->initialized) {
have_to_wait = 1;
continue;
}
spin_lock(&w1_mlock);
list_del(&dev->w1_master_entry);
spin_unlock(&w1_mlock);
if (control_needs_exit) {
dev->need_exit = 1;
err = kill_proc(dev->kpid, SIGTERM, 1);
if (err)
dev_err(&dev->dev,
"Failed to send signal to w1 kernel thread %d.\n",
dev->kpid);
}
wait_for_completion(&dev->dev_exited);
list_for_each_safe(ent, n, &dev->slist) {
sl = list_entry(ent, struct w1_slave, w1_slave_entry);
if (!sl)
dev_warn(&dev->dev,
"%s: slave entry is NULL.\n",
__func__);
else {
list_del(&sl->w1_slave_entry);
w1_slave_detach(sl);
kfree(sl);
}
}
device_remove_file(&dev->dev, &w1_master_attribute);
atomic_dec(&dev->refcnt);
}
}
complete_and_exit(&w1_control_complete, 0);
}
int w1_process(void *data)
{
struct w1_master *dev = (struct w1_master *) data;
unsigned long timeout;
daemonize("%s", dev->name);
allow_signal(SIGTERM);
while (!dev->need_exit) {
timeout = w1_timeout;
do {
timeout = interruptible_sleep_on_timeout(&dev->kwait, timeout);
if (current->flags & PF_FREEZE)
refrigerator(PF_FREEZE);
} while (!signal_pending(current) && (timeout > 0));
if (signal_pending(current))
flush_signals(current);
if (dev->need_exit)
break;
if (!dev->initialized)
continue;
if (down_interruptible(&dev->mutex))
continue;
w1_search(dev);
up(&dev->mutex);
}
atomic_dec(&dev->refcnt);
complete_and_exit(&dev->dev_exited, 0);
return 0;
}
int w1_init(void)
{
int retval;
printk(KERN_INFO "Driver for 1-wire Dallas network protocol.\n");
retval = bus_register(&w1_bus_type);
if (retval) {
printk(KERN_ERR "Failed to register bus. err=%d.\n", retval);
goto err_out_exit_init;
}
retval = driver_register(&w1_driver);
if (retval) {
printk(KERN_ERR
"Failed to register master driver. err=%d.\n",
retval);
goto err_out_bus_unregister;
}
control_thread = kernel_thread(&w1_control, NULL, 0);
if (control_thread < 0) {
printk(KERN_ERR "Failed to create control thread. err=%d\n",
control_thread);
retval = control_thread;
goto err_out_driver_unregister;
}
return 0;
err_out_driver_unregister:
driver_unregister(&w1_driver);
err_out_bus_unregister:
bus_unregister(&w1_bus_type);
err_out_exit_init:
return retval;
}
void w1_fini(void)
{
struct w1_master *dev;
struct list_head *ent, *n;
list_for_each_safe(ent, n, &w1_masters) {
dev = list_entry(ent, struct w1_master, w1_master_entry);
__w1_remove_master_device(dev);
}
control_needs_exit = 1;
wait_for_completion(&w1_control_complete);
driver_unregister(&w1_driver);
bus_unregister(&w1_bus_type);
}
module_init(w1_init);
module_exit(w1_fini);
drivers/w1/w1.h 0 → 100644
View file @ 918953bc
/*
* w1.h
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __W1_H
#define __W1_H
struct w1_reg_num
{
__u64 family:8,
id:48,
crc:8;
};
#ifdef __KERNEL__
#include <linux/completion.h>
#include <linux/device.h>
#include <net/sock.h>
#include <asm/semaphore.h>
#include "w1_family.h"
#define W1_MAXNAMELEN 32
#define W1_SLAVE_DATA_SIZE 128
#define W1_SEARCH 0xF0
#define W1_CONDITIONAL_SEARCH 0xEC
#define W1_CONVERT_TEMP 0x44
#define W1_SKIP_ROM 0xCC
#define W1_READ_SCRATCHPAD 0xBE
#define W1_READ_ROM 0x33
#define W1_READ_PSUPPLY 0xB4
#define W1_MATCH_ROM 0x55
struct w1_slave
{
struct module *owner;
unsigned char name[W1_MAXNAMELEN];
struct list_head w1_slave_entry;
struct w1_reg_num reg_num;
atomic_t refcnt;
u8 rom[9];
struct w1_master *master;
struct w1_family *family;
struct device dev;
struct completion dev_released;
};
struct w1_bus_master
{
unsigned long data;
u8 (*read_bit)(unsigned long);
void (*write_bit)(unsigned long, u8);
};
struct w1_master
{
struct list_head w1_master_entry;
struct module *owner;
unsigned char name[W1_MAXNAMELEN];
struct list_head slist;
int max_slave_count, slave_count;
unsigned long attempts;
int initialized;
u32 id;
atomic_t refcnt;
void *priv;
int priv_size;
int need_exit;
pid_t kpid;
wait_queue_head_t kwait;
struct semaphore mutex;
struct device_driver *driver;
struct device dev;
struct completion dev_released;
struct completion dev_exited;
struct w1_bus_master *bus_master;
u32 seq, groups;
struct sock *nls;
};
#endif /* __KERNEL__ */
#endif /* __W1_H */
drivers/w1/w1_family.c 0 → 100644
View file @ 918953bc
/*
* w1_family.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/spinlock.h>
#include <linux/list.h>
#include "w1_family.h"
spinlock_t w1_flock = SPIN_LOCK_UNLOCKED;
static LIST_HEAD(w1_families);
int w1_register_family(struct w1_family *newf)
{
struct list_head *ent, *n;
struct w1_family *f;
int ret = 0;
spin_lock(&w1_flock);
list_for_each_safe(ent, n, &w1_families) {
f = list_entry(ent, struct w1_family, family_entry);
if (f->fid == newf->fid) {
ret = -EEXIST;
break;
}
}
if (!ret) {
atomic_set(&newf->refcnt, 0);
newf->need_exit = 0;
list_add_tail(&newf->family_entry, &w1_families);
}
spin_unlock(&w1_flock);
return ret;
}
void w1_unregister_family(struct w1_family *fent)
{
struct list_head *ent, *n;
struct w1_family *f;
spin_lock(&w1_flock);
list_for_each_safe(ent, n, &w1_families) {
f = list_entry(ent, struct w1_family, family_entry);
if (f->fid == fent->fid) {
list_del(&fent->family_entry);
break;
}
}
fent->need_exit = 1;
spin_unlock(&w1_flock);
while (atomic_read(&fent->refcnt))
schedule_timeout(10);
}
/*
* Should be called under w1_flock held.
*/
struct w1_family * w1_family_registered(u8 fid)
{
struct list_head *ent, *n;
struct w1_family *f = NULL;
int ret = 0;
list_for_each_safe(ent, n, &w1_families) {
f = list_entry(ent, struct w1_family, family_entry);
if (f->fid == fid) {
ret = 1;
break;
}
}
return (ret) ? f : NULL;
}
void w1_family_put(struct w1_family *f)
{
spin_lock(&w1_flock);
__w1_family_put(f);
spin_unlock(&w1_flock);
}
void __w1_family_put(struct w1_family *f)
{
if (atomic_dec_and_test(&f->refcnt))
f->need_exit = 1;
}
void w1_family_get(struct w1_family *f)
{
spin_lock(&w1_flock);
__w1_family_get(f);
spin_unlock(&w1_flock);
}
void __w1_family_get(struct w1_family *f)
{
atomic_inc(&f->refcnt);
}
EXPORT_SYMBOL(w1_family_get);
EXPORT_SYMBOL(w1_family_put);
EXPORT_SYMBOL(__w1_family_get);
EXPORT_SYMBOL(__w1_family_put);
EXPORT_SYMBOL(w1_family_registered);
EXPORT_SYMBOL(w1_unregister_family);
EXPORT_SYMBOL(w1_register_family);
drivers/w1/w1_family.h 0 → 100644
View file @ 918953bc
/*
* w1_family.h
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __W1_FAMILY_H
#define __W1_FAMILY_H
#include <linux/types.h>
#include <linux/device.h>
#include <asm/atomic.h>
#define W1_FAMILY_DEFAULT 0
#define W1_FAMILY_THERM 0x10
#define W1_FAMILY_IBUT 0xff /* ? */
#define MAXNAMELEN 32
struct w1_family_ops
{
ssize_t (* rname)(struct device *, char *);
ssize_t (* rbin)(struct kobject *, char *, loff_t, size_t);
ssize_t (* rval)(struct device *, char *);
unsigned char rvalname[MAXNAMELEN];
};
struct w1_family
{
struct list_head family_entry;
u8 fid;
struct w1_family_ops *fops;
atomic_t refcnt;
u8 need_exit;
};
extern spinlock_t w1_flock;
void w1_family_get(struct w1_family *);
void w1_family_put(struct w1_family *);
void __w1_family_get(struct w1_family *);
void __w1_family_put(struct w1_family *);
struct w1_family * w1_family_registered(u8);
void w1_unregister_family(struct w1_family *);
int w1_register_family(struct w1_family *);
#endif /* __W1_FAMILY_H */
drivers/w1/w1_int.c 0 → 100644
View file @ 918953bc
/*
* w1_int.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/list.h>
#include "w1.h"
#include "w1_log.h"
static u32 w1_ids = 1;
extern struct device_driver w1_driver;
extern struct bus_type w1_bus_type;
extern struct device w1_device;
extern struct device_attribute w1_master_attribute;
extern int w1_max_slave_count;
extern struct list_head w1_masters;
extern spinlock_t w1_mlock;
extern int w1_process(void *);
struct w1_master * w1_alloc_dev(u32 id, int slave_count,
struct device_driver *driver, struct device *device)
{
struct w1_master *dev;
int err;
/*
* We are in process context(kernel thread), so can sleep.
*/
dev = kmalloc(sizeof(struct w1_master) + sizeof(struct w1_bus_master), GFP_KERNEL);
if (!dev) {
printk(KERN_ERR
"Failed to allocate %d bytes for new w1 device.\n",
sizeof(struct w1_master));
return NULL;
}
memset(dev, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
dev->bus_master = (struct w1_bus_master *)(dev + 1);
dev->owner = THIS_MODULE;
dev->max_slave_count = slave_count;
dev->slave_count = 0;
dev->attempts = 0;
dev->kpid = -1;
dev->initialized = 0;
dev->id = id;
atomic_set(&dev->refcnt, 2);
INIT_LIST_HEAD(&dev->slist);
init_MUTEX(&dev->mutex);
init_waitqueue_head(&dev->kwait);
init_completion(&dev->dev_released);
init_completion(&dev->dev_exited);
memcpy(&dev->dev, device, sizeof(struct device));
snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
"w1_bus_master%u", dev->id);
snprintf(dev->name, sizeof(dev->name), "w1_bus_master%u", dev->id);
dev->driver = driver;
dev->groups = 23;
dev->seq = 1;
dev->nls = netlink_kernel_create(NETLINK_NFLOG, NULL);
if (!dev->nls) {
printk(KERN_ERR "Failed to create new netlink socket(%u).\n",
NETLINK_NFLOG);
memset(dev, 0, sizeof(struct w1_master));
kfree(dev);
dev = NULL;
}
err = device_register(&dev->dev);
if (err) {
printk(KERN_ERR "Failed to register master device. err=%d\n", err);
if (dev->nls->sk_socket)
sock_release(dev->nls->sk_socket);
memset(dev, 0, sizeof(struct w1_master));
kfree(dev);
dev = NULL;
}
return dev;
}
void w1_free_dev(struct w1_master *dev)
{
device_unregister(&dev->dev);
if (dev->nls->sk_socket)
sock_release(dev->nls->sk_socket);
memset(dev, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
kfree(dev);
}
int w1_add_master_device(struct w1_bus_master *master)
{
struct w1_master *dev;
int retval = 0;
dev = w1_alloc_dev(w1_ids++, w1_max_slave_count, &w1_driver, &w1_device);
if (!dev)
return -ENOMEM;
dev->kpid = kernel_thread(&w1_process, dev, 0);
if (dev->kpid < 0) {
dev_err(&dev->dev,
"Failed to create new kernel thread. err=%d\n",
dev->kpid);
retval = dev->kpid;
goto err_out_free_dev;
}
retval = device_create_file(&dev->dev, &w1_master_attribute);
if (retval)
goto err_out_kill_thread;
memcpy(dev->bus_master, master, sizeof(struct w1_bus_master));
dev->initialized = 1;
spin_lock(&w1_mlock);
list_add(&dev->w1_master_entry, &w1_masters);
spin_unlock(&w1_mlock);
return 0;
err_out_kill_thread:
dev->need_exit = 1;
if (kill_proc(dev->kpid, SIGTERM, 1))
dev_err(&dev->dev,
"Failed to send signal to w1 kernel thread %d.\n",
dev->kpid);
wait_for_completion(&dev->dev_exited);
err_out_free_dev:
w1_free_dev(dev);
return retval;
}
void __w1_remove_master_device(struct w1_master *dev)
{
int err;
dev->need_exit = 1;
err = kill_proc(dev->kpid, SIGTERM, 1);
if (err)
dev_err(&dev->dev,
"%s: Failed to send signal to w1 kernel thread %d.\n",
__func__, dev->kpid);
while (atomic_read(&dev->refcnt))
schedule_timeout(10);
w1_free_dev(dev);
}
void w1_remove_master_device(struct w1_bus_master *bm)
{
struct w1_master *dev = NULL;
struct list_head *ent, *n;
list_for_each_safe(ent, n, &w1_masters) {
dev = list_entry(ent, struct w1_master, w1_master_entry);
if (!dev->initialized)
continue;
if (dev->bus_master->data == bm->data)
break;
}
if (!dev) {
printk(KERN_ERR "Device doesn't exist.\n");
return;
}
__w1_remove_master_device(dev);
}
EXPORT_SYMBOL(w1_alloc_dev);
EXPORT_SYMBOL(w1_free_dev);
EXPORT_SYMBOL(w1_add_master_device);
EXPORT_SYMBOL(w1_remove_master_device);
EXPORT_SYMBOL(__w1_remove_master_device);
drivers/w1/w1_int.h 0 → 100644
View file @ 918953bc
/*
* w1_int.h
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __W1_INT_H
#define __W1_INT_H
#include <linux/kernel.h>
#include <linux/device.h>
#include "w1.h"
struct w1_master * w1_alloc_dev(int, struct device_driver *, struct device *);
void w1_free_dev(struct w1_master *dev);
int w1_add_master_device(struct w1_bus_master *);
void w1_remove_master_device(struct w1_bus_master *);
void __w1_remove_master_device(struct w1_master *);
#endif /* __W1_INT_H */
drivers/w1/w1_io.c 0 → 100644
View file @ 918953bc
/*
* w1_io.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/io.h>
#include <asm/delay.h>
#include <linux/moduleparam.h>
#include "w1.h"
#include "w1_log.h"
#include "w1_io.h"
int w1_delay_parm = 1;
module_param_named(delay_coef, w1_delay_parm, int, 0);
static u8 w1_crc8_table[] = {
0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,
17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,
175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,
50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53
};
void w1_delay(unsigned long tm)
{
udelay(tm * w1_delay_parm);
}
void w1_write_bit(struct w1_master *dev, int bit)
{
if (bit) {
dev->bus_master->write_bit(dev->bus_master->data, 0);
w1_delay(6);
dev->bus_master->write_bit(dev->bus_master->data, 1);
w1_delay(64);
} else {
dev->bus_master->write_bit(dev->bus_master->data, 0);
w1_delay(60);
dev->bus_master->write_bit(dev->bus_master->data, 1);
w1_delay(10);
}
}
void w1_write_8(struct w1_master *dev, u8 byte)
{
int i;
for (i = 0; i < 8; ++i)
w1_write_bit(dev, (byte >> i) & 0x1);
}
u8 w1_read_bit(struct w1_master *dev)
{
int result;
dev->bus_master->write_bit(dev->bus_master->data, 0);
w1_delay(6);
dev->bus_master->write_bit(dev->bus_master->data, 1);
w1_delay(9);
result = dev->bus_master->read_bit(dev->bus_master->data);
w1_delay(55);
return result & 0x1;
}
u8 w1_read_8(struct w1_master * dev)
{
int i;
u8 res = 0;
for (i = 0; i < 8; ++i)
res |= (w1_read_bit(dev) << i);
return res;
}
int w1_reset_bus(struct w1_master *dev)
{
int result;
dev->bus_master->write_bit(dev->bus_master->data, 0);
w1_delay(480);
dev->bus_master->write_bit(dev->bus_master->data, 1);
w1_delay(70);
result = dev->bus_master->read_bit(dev->bus_master->data) & 0x1;
w1_delay(410);
return result;
}
u8 w1_calc_crc8(u8 * data, int len)
{
u8 crc = 0;
while (len--)
crc = w1_crc8_table[crc ^ *data++];
return crc;
}
EXPORT_SYMBOL(w1_write_bit);
EXPORT_SYMBOL(w1_write_8);
EXPORT_SYMBOL(w1_read_bit);
EXPORT_SYMBOL(w1_read_8);
EXPORT_SYMBOL(w1_reset_bus);
EXPORT_SYMBOL(w1_calc_crc8);
EXPORT_SYMBOL(w1_delay);
drivers/w1/w1_io.h 0 → 100644
View file @ 918953bc
/*
* w1_io.h
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __W1_IO_H
#define __W1_IO_H
#include "w1.h"
void w1_delay(unsigned long);
void w1_write_bit(struct w1_master *, int);
void w1_write_8(struct w1_master *, u8);
u8 w1_read_bit(struct w1_master *);
u8 w1_read_8(struct w1_master *);
int w1_reset_bus(struct w1_master *);
u8 w1_calc_crc8(u8 *, int);
#endif /* __W1_IO_H */
drivers/w1/w1_log.h 0 → 100644
View file @ 918953bc
/*
* w1_log.h
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __W1_LOG_H
#define __W1_LOG_H
#define DEBUG
#ifdef W1_DEBUG
# define assert(expr) do {} while (0)
#else
# define assert(expr) \
if(unlikely(!(expr))) { \
printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
#expr,__FILE__,__FUNCTION__,__LINE__); \
}
#endif
#endif /* __W1_LOG_H */
drivers/w1/w1_netlink.c 0 → 100644
View file @ 918953bc
/*
* w1_netlink.c
*
* Copyright (c) 2003 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include "w1.h"
#include "w1_log.h"
#include "w1_netlink.h"
void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg)
{
unsigned int size;
struct sk_buff *skb;
struct w1_netlink_msg *data;
struct nlmsghdr *nlh;
size = NLMSG_SPACE(sizeof(struct w1_netlink_msg));
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
dev_err(&dev->dev, "skb_alloc() failed.\n");
return;
}
nlh = NLMSG_PUT(skb, 0, dev->seq++, NLMSG_DONE, size - sizeof(*nlh));
data = (struct w1_netlink_msg *)NLMSG_DATA(nlh);
memcpy(data, msg, sizeof(struct w1_netlink_msg));
NETLINK_CB(skb).dst_groups = dev->groups;
netlink_broadcast(dev->nls, skb, 0, dev->groups, GFP_ATOMIC);
nlmsg_failure:
return;
}
drivers/w1/w1_netlink.h 0 → 100644
View file @ 918953bc
/*
* w1_netlink.h
*
* Copyright (c) 2003 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __W1_NETLINK_H
#define __W1_NETLINK_H
#include <asm/types.h>
#include "w1.h"
struct w1_netlink_msg
{
union
{
struct w1_reg_num id;
__u64 w1_id;
} id;
__u64 val;
};
#ifdef __KERNEL__
void w1_netlink_send(struct w1_master *, struct w1_netlink_msg *);
#endif /* __KERNEL__ */
#endif /* __W1_NETLINK_H */
drivers/w1/w1_therm.c 0 → 100644
View file @ 918953bc
/*
* w1_therm.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the therms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/types.h>
#include "w1.h"
#include "w1_io.h"
#include "w1_int.h"
#include "w1_family.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, temperature family.");
static ssize_t w1_therm_read_name(struct device *, char *);
static ssize_t w1_therm_read_temp(struct device *, char *);
static ssize_t w1_therm_read_bin(struct kobject *, char *, loff_t, size_t);
static struct w1_family_ops w1_therm_fops = {
.rname = &w1_therm_read_name,
.rbin = &w1_therm_read_bin,
.rval = &w1_therm_read_temp,
.rvalname = "temp1_input",
};
static ssize_t w1_therm_read_name(struct device *dev, char *buf)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
return sprintf(buf, "%s\n", sl->name);
}
static ssize_t w1_therm_read_temp(struct device *dev, char *buf)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
s16 temp;
/*
* Must be more precise.
*/
temp = 0;
temp <<= sl->rom[1] / 2;
temp |= sl->rom[0] / 2;
return sprintf(buf, "%d\n", temp * 1000);
}
static ssize_t w1_therm_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
struct w1_slave, dev);
struct w1_master *dev = sl->master;
u8 rom[9], crc, verdict;
size_t icount;
int i;
u16 temp;
atomic_inc(&sl->refcnt);
if (down_interruptible(&sl->master->mutex)) {
count = 0;
goto out_dec;
}
if (off > W1_SLAVE_DATA_SIZE) {
count = 0;
goto out;
}
if (off + count > W1_SLAVE_DATA_SIZE)
count = W1_SLAVE_DATA_SIZE - off;
icount = count;
memset(buf, 0, count);
memset(rom, 0, sizeof(rom));
count = 0;
verdict = 0;
crc = 0;
if (!w1_reset_bus(dev)) {
u64 id = *(u64 *) & sl->reg_num;
int count = 0;
w1_write_8(dev, W1_MATCH_ROM);
for (i = 0; i < 8; ++i)
w1_write_8(dev, (id >> i * 8) & 0xff);
w1_write_8(dev, W1_CONVERT_TEMP);
while (dev->bus_master->read_bit(dev->bus_master->data) == 0
&& count < 10) {
w1_delay(1);
count++;
}
if (count < 10) {
if (!w1_reset_bus(dev)) {
w1_write_8(dev, W1_MATCH_ROM);
for (i = 0; i < 8; ++i)
w1_write_8(dev,
(id >> i * 8) & 0xff);
w1_write_8(dev, W1_READ_SCRATCHPAD);
for (i = 0; i < 9; ++i)
rom[i] = w1_read_8(dev);
crc = w1_calc_crc8(rom, 8);
if (rom[8] == crc && rom[0])
verdict = 1;
}
}
else
dev_warn(&dev->dev,
"18S20 doesn't respond to CONVERT_TEMP.\n");
}
for (i = 0; i < 9; ++i)
count += snprintf(buf + count, icount - count, "%02x ", rom[i]);
count += snprintf(buf + count, icount - count, ": crc=%02x %s\n",
crc, (verdict) ? "YES" : "NO");
if (verdict)
memcpy(sl->rom, rom, sizeof(sl->rom));
for (i = 0; i < 9; ++i)
count += snprintf(buf + count, icount - count, "%02x ", sl->rom[i]);
temp = 0;
temp <<= sl->rom[1] / 2;
temp |= sl->rom[0] / 2;
count += snprintf(buf + count, icount - count, "t=%u\n", temp);
out:
up(&dev->mutex);
out_dec:
atomic_dec(&sl->refcnt);
return count;
}
static struct w1_family w1_therm_family = {
.fid = W1_FAMILY_THERM,
.fops = &w1_therm_fops,
};
static int __init w1_therm_init(void)
{
return w1_register_family(&w1_therm_family);
}
static void __exit w1_therm_fini(void)
{
w1_unregister_family(&w1_therm_family);
}
module_init(w1_therm_init);
module_exit(w1_therm_fini);
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