Commit 4a7df24d authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-linus/2640/i2c' of git://git.fluff.org/bjdooks/linux

* 'for-linus/2640/i2c' of git://git.fluff.org/bjdooks/linux: (21 commits)
  mach-ux500: set proper I2C platform data from MOP500s
  i2c-nomadik: break out single messsage transmission
  i2c-nomadik: reset the hw after status check
  i2c-nomadik: remove the unnecessary delay
  i2c-nomadik: change the TX and RX threshold
  i2c-nomadik: add code to retry on timeout failure
  i2c-nomadik: use pm_runtime API
  i2c-nomadik: print abort cause only on abort tag
  i2c-nomadik: correct adapter timeout initialization
  i2c-nomadik: remove the redundant error message
  i2c-nomadik: corrrect returned error numbers
  i2c-nomadik: fix speed enumerator
  i2c-nomadik: make i2c timeout specific per i2c bus
  i2c-nomadik: add regulator support
  i2c: i2c-sh_mobile bus speed platform data V2
  i2c: i2c-sh_mobile clock string removal
  i2c-eg20t: Support new device ML7223 IOH
  i2c: tegra: Add de-bounce cycles.
  i2c: tegra: fix repeated start handling
  i2c: tegra: recover from spurious interrupt storm
  ...
parents 37d8cb54 5bdfdfee
......@@ -204,7 +204,7 @@ static struct i2c_board_info __initdata mop500_i2c2_devices[] = {
},
};
#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, t_out, _sm) \
static struct nmk_i2c_controller u8500_i2c##id##_data = { \
/* \
* slave data setup time, which is \
......@@ -219,19 +219,21 @@ static struct nmk_i2c_controller u8500_i2c##id##_data = { \
.rft = _rft, \
/* std. mode operation */ \
.clk_freq = clk, \
/* Slave response timeout(ms) */\
.timeout = t_out, \
.sm = _sm, \
}
/*
* The board uses 4 i2c controllers, initialize all of
* them with slave data setup time of 250 ns,
* Tx & Rx FIFO threshold values as 1 and standard
* Tx & Rx FIFO threshold values as 8 and standard
* mode of operation
*/
U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(0, 0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
U8500_I2C_CONTROLLER(1, 0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
U8500_I2C_CONTROLLER(2, 0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
U8500_I2C_CONTROLLER(3, 0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
static void __init mop500_i2c_init(void)
{
......
......@@ -11,8 +11,8 @@
enum i2c_freq_mode {
I2C_FREQ_MODE_STANDARD, /* up to 100 Kb/s */
I2C_FREQ_MODE_FAST, /* up to 400 Kb/s */
I2C_FREQ_MODE_HIGH_SPEED, /* up to 3.4 Mb/s */
I2C_FREQ_MODE_FAST_PLUS, /* up to 1 Mb/s */
I2C_FREQ_MODE_HIGH_SPEED /* up to 3.4 Mb/s */
};
/**
......@@ -24,6 +24,7 @@ enum i2c_freq_mode {
* to the values of 14, 6, 2 for a 48 MHz i2c clk
* @tft: Tx FIFO Threshold in bytes
* @rft: Rx FIFO Threshold in bytes
* @timeout Slave response timeout(ms)
* @sm: speed mode
*/
struct nmk_i2c_controller {
......@@ -31,6 +32,7 @@ struct nmk_i2c_controller {
unsigned short slsu;
unsigned char tft;
unsigned char rft;
int timeout;
enum i2c_freq_mode sm;
};
......
......@@ -673,15 +673,19 @@ config I2C_XILINX
will be called xilinx_i2c.
config I2C_EG20T
tristate "Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH"
tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223)"
depends on PCI
help
This driver is for PCH(Platform controller Hub) I2C of EG20T which
is an IOH(Input/Output Hub) for x86 embedded processor.
This driver can access PCH I2C bus device.
This driver also supports the ML7213, a companion chip for the
Atom E6xx series and compatible with the Intel EG20T PCH.
This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
Output Hub), ML7213 and ML7223.
ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is
for MP(Media Phone) use.
ML7213/ML7223 is companion chip for Intel Atom E6xx series.
ML7213/ML7223 is completely compatible for Intel EG20T PCH.
comment "External I2C/SMBus adapter drivers"
......
......@@ -182,10 +182,12 @@ static DEFINE_MUTEX(pch_mutex);
/* Definition for ML7213 by OKI SEMICONDUCTOR */
#define PCI_VENDOR_ID_ROHM 0x10DB
#define PCI_DEVICE_ID_ML7213_I2C 0x802D
#define PCI_DEVICE_ID_ML7223_I2C 0x8010
static struct pci_device_id __devinitdata pch_pcidev_id[] = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_I2C), 1, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_I2C), 2, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_I2C), 1, },
{0,}
};
......
This diff is collapsed.
......@@ -32,6 +32,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/i2c/i2c-sh_mobile.h>
/* Transmit operation: */
/* */
......@@ -117,7 +118,7 @@ struct sh_mobile_i2c_data {
struct device *dev;
void __iomem *reg;
struct i2c_adapter adap;
unsigned long bus_speed;
struct clk *clk;
u_int8_t icic;
u_int8_t iccl;
......@@ -205,7 +206,7 @@ static void activate_ch(struct sh_mobile_i2c_data *pd)
* We also round off the result.
*/
num = i2c_clk * 5;
denom = NORMAL_SPEED * 9;
denom = pd->bus_speed * 9;
tmp = num * 10 / denom;
if (tmp % 10 >= 5)
pd->iccl = (u_int8_t)((num/denom) + 1);
......@@ -574,10 +575,10 @@ static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, int hook)
static int sh_mobile_i2c_probe(struct platform_device *dev)
{
struct i2c_sh_mobile_platform_data *pdata = dev->dev.platform_data;
struct sh_mobile_i2c_data *pd;
struct i2c_adapter *adap;
struct resource *res;
char clk_name[8];
int size;
int ret;
......@@ -587,10 +588,9 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
return -ENOMEM;
}
snprintf(clk_name, sizeof(clk_name), "i2c%d", dev->id);
pd->clk = clk_get(&dev->dev, clk_name);
pd->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(pd->clk)) {
dev_err(&dev->dev, "cannot get clock \"%s\"\n", clk_name);
dev_err(&dev->dev, "cannot get clock\n");
ret = PTR_ERR(pd->clk);
goto err;
}
......@@ -620,6 +620,11 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
goto err_irq;
}
/* Use platformd data bus speed or NORMAL_SPEED */
pd->bus_speed = NORMAL_SPEED;
if (pdata && pdata->bus_speed)
pd->bus_speed = pdata->bus_speed;
/* The IIC blocks on SH-Mobile ARM processors
* come with two new bits in ICIC.
*/
......@@ -660,6 +665,8 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
goto err_all;
}
dev_info(&dev->dev, "I2C adapter %d with bus speed %lu Hz\n",
adap->nr, pd->bus_speed);
return 0;
err_all:
......
......@@ -35,8 +35,10 @@
#define BYTES_PER_FIFO_WORD 4
#define I2C_CNFG 0x000
#define I2C_CNFG_DEBOUNCE_CNT_SHIFT 12
#define I2C_CNFG_PACKET_MODE_EN (1<<10)
#define I2C_CNFG_NEW_MASTER_FSM (1<<11)
#define I2C_STATUS 0x01C
#define I2C_SL_CNFG 0x020
#define I2C_SL_CNFG_NEWSL (1<<2)
#define I2C_SL_ADDR1 0x02c
......@@ -77,6 +79,7 @@
#define I2C_ERR_NONE 0x00
#define I2C_ERR_NO_ACK 0x01
#define I2C_ERR_ARBITRATION_LOST 0x02
#define I2C_ERR_UNKNOWN_INTERRUPT 0x04
#define PACKET_HEADER0_HEADER_SIZE_SHIFT 28
#define PACKET_HEADER0_PACKET_ID_SHIFT 16
......@@ -121,6 +124,7 @@ struct tegra_i2c_dev {
void __iomem *base;
int cont_id;
int irq;
bool irq_disabled;
int is_dvc;
struct completion msg_complete;
int msg_err;
......@@ -325,11 +329,17 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
if (i2c_dev->is_dvc)
tegra_dvc_init(i2c_dev);
val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN;
val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN |
(0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
i2c_writel(i2c_dev, val, I2C_CNFG);
i2c_writel(i2c_dev, 0, I2C_INT_MASK);
clk_set_rate(i2c_dev->clk, i2c_dev->bus_clk_rate * 8);
if (!i2c_dev->is_dvc) {
u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG);
i2c_writel(i2c_dev, sl_cfg | I2C_SL_CNFG_NEWSL, I2C_SL_CNFG);
}
val = 7 << I2C_FIFO_CONTROL_TX_TRIG_SHIFT |
0 << I2C_FIFO_CONTROL_RX_TRIG_SHIFT;
i2c_writel(i2c_dev, val, I2C_FIFO_CONTROL);
......@@ -338,6 +348,12 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
err = -ETIMEDOUT;
clk_disable(i2c_dev->clk);
if (i2c_dev->irq_disabled) {
i2c_dev->irq_disabled = 0;
enable_irq(i2c_dev->irq);
}
return err;
}
......@@ -350,8 +366,19 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
status = i2c_readl(i2c_dev, I2C_INT_STATUS);
if (status == 0) {
dev_warn(i2c_dev->dev, "interrupt with no status\n");
return IRQ_NONE;
dev_warn(i2c_dev->dev, "irq status 0 %08x %08x %08x\n",
i2c_readl(i2c_dev, I2C_PACKET_TRANSFER_STATUS),
i2c_readl(i2c_dev, I2C_STATUS),
i2c_readl(i2c_dev, I2C_CNFG));
i2c_dev->msg_err |= I2C_ERR_UNKNOWN_INTERRUPT;
if (!i2c_dev->irq_disabled) {
disable_irq_nosync(i2c_dev->irq);
i2c_dev->irq_disabled = 1;
}
complete(&i2c_dev->msg_complete);
goto err;
}
if (unlikely(status & status_err)) {
......@@ -391,6 +418,8 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
I2C_INT_PACKET_XFER_COMPLETE | I2C_INT_TX_FIFO_DATA_REQ |
I2C_INT_RX_FIFO_DATA_REQ);
i2c_writel(i2c_dev, status, I2C_INT_STATUS);
if (i2c_dev->is_dvc)
dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS);
return IRQ_HANDLED;
}
......@@ -424,12 +453,12 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
packet_header = msg->addr << I2C_HEADER_SLAVE_ADDR_SHIFT;
packet_header |= I2C_HEADER_IE_ENABLE;
if (!stop)
packet_header |= I2C_HEADER_REPEAT_START;
if (msg->flags & I2C_M_TEN)
packet_header |= I2C_HEADER_10BIT_ADDR;
if (msg->flags & I2C_M_IGNORE_NAK)
packet_header |= I2C_HEADER_CONT_ON_NAK;
if (msg->flags & I2C_M_NOSTART)
packet_header |= I2C_HEADER_REPEAT_START;
if (msg->flags & I2C_M_RD)
packet_header |= I2C_HEADER_READ;
i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
......
#ifndef __I2C_SH_MOBILE_H__
#define __I2C_SH_MOBILE_H__
#include <linux/platform_device.h>
struct i2c_sh_mobile_platform_data {
unsigned long bus_speed;
};
#endif /* __I2C_SH_MOBILE_H__ */
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