[PATCH] dvb: b2c2/flexcop driver refactoring part 2: add modular Flexcop driver

b2c2/flexcop driver refactoring to support PCI and USB based cards part 2: add
modular Flexcop driver
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Documentation/dvb/README.flexcop

+This README escorted the skystar2-driver rewriting procedure. It describes the
+state of the new flexcop-driver set and some internals are written down here
+too.
+
+How to do something in here?
+============================
+
+make -f Makefile.t
+make -C ../build-2.6
+./in.sh  # load the drivers
+./rm.sh  # unload the drivers
+
+Please read this file, if you want to contribute.
+
+This document hopefully describes things about the flexcop and its
+device-offsprings. Goal is to write a easy-to-write and easy-to-read set of
+drivers based on the skystar2.c and other information.
+
+This directory is temporary. It is used for rewriting the skystar2.c and to
+create shared code, which then can be used by the usb box as well.
+
+Remark: flexcop-pci.c was a copy of skystar2.c, but every line has been
+touched and rewritten.
+
+General coding processing
+=========================
+
+We should proceed as follows (as long as no one complains):
+
+0) Think before start writing code!
+
+1) rewriting the skystar2.c with the help of the flexcop register descriptions
+and splitting up the files to a pci-bus-part and a flexcop-part.
+The new driver will be called b2c2-flexcop-pci.ko/b2c2-flexcop-usb.ko for the
+device-specific part and b2c2-flexcop.ko for the common flexcop-functions.
+
+2) Search for errors in the leftover of flexcop-pci.c (compare with pluto2.c
+and other pci drivers)
+
+3) make some beautification (see 'Improvements when rewriting (refactoring) is
+done')
+
+4) Testing the new driver and maybe substitute the skystar2.c with it, to reach
+a wider tester audience.
+
+5) creating an usb-bus-part using the already written flexcop code for the pci
+card.
+
+Idea: create a kernel-object for the flexcop and export all important
+functions. This option saves kernel-memory, but maybe a lot of functions have
+to be exported to kernel namespace.
+
+
+Current situation
+=================
+
+0) Done :)
+1) Done (some minor issues left)
+2) Done
+3) Not ready yet, more information is necessary
+4) next to be done (see the table below)
+5) USB driver is working (yes, there are some minor issues)
+
+What seems to be ready?
+-----------------------
+
+1) Rewriting
+1a) i2c is cut off from the flexcop-pci.c and seems to work
+1b) moved tuner and demod stuff from flexcop-pci.c to flexcop-tuner-fe.c
+1c) moved lnb and diseqc stuff from flexcop-pci.c to flexcop-tuner-fe.c
+1e) eeprom (reading MAC address)
+1d) sram (no dynamic sll size detection (commented out) (using default as JJ told me))
+1f) misc. register accesses for reading parameters (e.g. resetting, revision)
+1g) pid/mac filter (flexcop-hw-filter.c)
+1i) dvb-stuff initialization in flexcop.c (done)
+1h) dma stuff (now just using the size-irq, instead of all-together, to be done)
+1j) remove flexcop initialization from flexcop-pci.c completely (done)
+1l) use a well working dma IRQ method (done, see 'Known bugs and problems and TODO')
+1k) cleanup flexcop-files (remove unused EXPORT_SYMBOLs, make static from
+non-static where possible, moved code to proper places)
+
+2) Search for errors in the leftover of flexcop-pci.c (partially done)
+5a) add MAC address reading
+
+What to do in the near future?
+--------------------------------------
+(no special order here)
+
+
+5) USB driver
+5b) optimize isoc-transfer (submitting/killing isoc URBs when transfer is starting)
+5c) feeding of ISOC data to the software demux (format of the isochronous data
+and speed optimization, no real error)
+
+Testing changes
+---------------
+
+O             = item is working
+P             = item is partially working
+X             = item is not working
+N             = item does not apply here
+<empty field> = item need to be examined
+
+       | PCI                               | USB
+item   | mt352 | nxt2002 | stv0299 | mt312 | mt352 | nxt2002 | stv0299 | mt312
+-------+-------+---------+---------+-------+-------+---------+---------+-------
+1a)    | O     |         |         |       | N     | N       | N       | N
+1b)    | O     |         |         |       |       |         | O       |
+1c)    | N     | N       |         |       | N     | N       | O       |
+1d)    |                 O                 |                 O
+1e)    |                 O                 |                 O
+1f)    |                                   P
+1g)    |                                   O
+1h)    |                 P                 |
+1i)    |                 O                 |                 N
+1j)    |                 O                 |                 N
+1l)    |                 O                 |                 N
+2)     |                 O                 |                 N
+5a)    |                 N                 |                 O
+5b)*   |                 N                 |
+5c)*   |                 N                 |
+
+* - not done yet
+
+Known bugs and problems and TODO
+--------------------------------
+
+1g/h/l) when pid filtering is enabled on the pci card
+
+DMA usage currently:
+  The DMA is splitted in 2 equal-sized subbuffers. The Flexcop writes to first
+  address and triggers an IRQ when it's full and starts writing to the second
+  address. When the second address is full, the IRQ is triggered again, and
+  the flexcop writes to first address again, and so on.
+  The buffersize of each address is currently 640*188 bytes.
+
+  Problem is, when using hw-pid-filtering and doing some low-bandwidth
+  operation (like scanning) the buffers won't be filled enough to trigger
+  the IRQ. That's why:
+
+  When PID filtering is activated, the timer IRQ is used. Every 1.97 ms the IRQ
+  is triggered.  Is the current write address of DMA1 different to the one
+  during the last IRQ, then the data is passed to the demuxer.
+
+  There is an additional DMA-IRQ-method: packet count IRQ. This isn't
+  implemented correctly yet.
+
+  The solution is to disable HW PID filtering, but I don't know how the DVB
+  API software demux behaves on slow systems with 45MBit/s TS.
+
+Solved bugs :)
+--------------
+1g) pid-filtering (somehow pid index 4 and 5 (EMM_PID and ECM_PID) aren't
+working)
+SOLUTION: also index 0 was affected, because net_translation is done for
+these indexes by default
+
+5b) isochronous transfer does only work in the first attempt (for the Sky2PC USB,
+Air2PC is working)
+SOLUTION: the flexcop was going asleep and never really woke up again (don't
+know if this need fixes, see flexcop-fe-tuner.c:flexcop_sleep)
+
+Improvements when rewriting (refactoring) is done
+=================================================
+
+- split sleeping of the flexcop (misc_204.ACPI3_sig = 1;) from lnb_control
+  (enable sleeping for other demods than dvb-s)
+- add support for CableStar (stv0297 Microtune 203x/ALPS)
+
+Debugging
+---------
+- add verbose debugging to skystar2.c (dump the reg_dw_data) and compare it
+  with this flexcop, this is important, because i2c is now using the
+  flexcop_ibi_value union from flexcop-reg.h (do you have a better idea for
+  that, please tell us so).
+
+Everything which is identical in the following table, can be put into a common
+flexcop-module.
+
+                  PCI                  USB
+-------------------------------------------------------------------------------
+Different:
+Register access:  accessing IO memory  USB control message
+I2C bus:          I2C bus of the FC    USB control message
+Data transfer:    DMA                  isochronous transfer
+EEPROM transfer:  through i2c bus      not clear yet
+
+Identical:
+Streaming:                 accessing registers
+PID Filtering:             accessing registers
+Sram destinations:         accessing registers
+Tuner/Demod:                     I2C bus
+DVB-stuff:            can be written for common use
+
+Restrictions:
+============
+
+We need to create a bus-specific-struct and a flexcop-struct.
+
+bus-specific-struct:
+
+struct flexcop_pci
+...
+
+struct flexcop_usb
+...
+
+
+struct flexcop_device {
+	void *bus_specific; /* container for bus-specific struct */
+...
+}
+
+PCI i2c can read/write max 4 bytes at a time, USB can more
+
+Functions
+=========
+
+Syntax
+------
+
+- Flexcop functions will be called "flexcop(_[a-z0-9]+)+" and exported as such
+  if needed.
+- Flexcop-device functions will be called "flexcop_device(_[a-z0-9]+)+" and
+  exported as such if needed.
+- Both will be compiled to b2c2-flexcop.ko and their source can be found in the
+  flexcop*.[hc]
+
+Callbacks and exports
+---------------------
+
+Bus-specific functions will be given as callbacks (function pointers) to the
+flexcop-module. (within the flexcop_device-struct)
+
+Initialization process
+======================
+
+b2c2-flexcop.ko is loaded
+b2c2-flexcop-<bus>.ko is loaded
+
+suppose a device is found:
+malloc flexcop and the bus-specific variables (via flexcop_device_malloc)
+fill the bus-specific variable
+fill the flexcop variable (especially the bus-specific callbacks)
+bus-specific initialization
+	- ...
+do the common initialization (via flexcop_device_initialize)
+	- reset the card
+	- determine flexcop type (II, IIB, III)
+	- hw_filters (bus dependent)
+	- 0x204
+	- set sram size
+	- create the dvb-stuff
+	- create i2c stuff
+	- frontend-initialization
+done
+bus specific:
+	- media_destination (this and the following 3 are bus specific)
+	- cai_dest
+	- cao_dest
+	- net_destination
+
+Bugs fixed while rewriting the driver
+=====================================
+
+- EEPROM access (to read the MAC address) was fixed to death some time last
+  year. (fixed here and in skystar2.c) (Bjarne, this was the piece of code
+  (fix-chipaddr) we were wondering about)
+
+
+Acknowledgements (just for the rewriting part)
+================
+
+Bjarne Steinsbo thought a lot in the first place of the pci part for this code
+sharing idea.
+
+Andreas Oberritter for providing a recent PCI initialization template (pluto2.c).
+
+comments, critics and ideas to linux-dvb@linuxtv.org or patrick.boettcher@desy.de

drivers/media/dvb/Kconfig

@@ -33,7 +33,7 @@ source "drivers/media/dvb/dibusb/Kconfig"
 source "drivers/media/dvb/cinergyT2/Kconfig"
 
 comment "Supported FlexCopII (B2C2) Adapters"
-	depends on DVB_CORE && PCI
+	depends on DVB_CORE && (PCI || USB)
 source "drivers/media/dvb/b2c2/Kconfig"
 
 comment "Supported BT878 Adapters"

drivers/media/dvb/b2c2/Kconfig

+config DVB_B2C2_FLEXCOP
+	tristate "Technisat/B2C2 FlexCopII(b) and FlexCopIII adapters"
+	depends on DVB_CORE
+	select DVB_STV0299
+	select DVB_MT352
+	select DVB_MT312
+	select DVB_NXT2002
+	select DVB_STV0297
+	help
+	  Support for the digital TV receiver chip made by B2C2 Inc. included in
+	  Technisats PCI cards and USB boxes.
+
+	  Say Y if you own such a device and want to use it.
+
+config DVB_B2C2_FLEXCOP_PCI
+	tristate "Technisat/B2C2 Air/Sky/Cable2PC PCI"
+	depends on DVB_B2C2_FLEXCOP && PCI
+	help
+	  Support for the Air/Sky/CableStar2 PCI card (DVB/ATSC) by Technisat/B2C2.
+
+	  Say Y if you own such a device and want to use it.
+
+config DVB_B2C2_FLEXCOP_USB
+	tristate "Technisat/B2C2 Air/Sky/Cable2PC USB"
+	depends on DVB_B2C2_FLEXCOP && USB
+	help
+	  Support for the Air/Sky/Cable2PC USB1.1 box (DVB/ATSC) by Technisat/B2C2,
+
+	  Say Y if you own such a device and want to use it.
+
+config DVB_B2C2_FLEXCOP_DEBUG
+	bool "Enable debug for the B2C2 FlexCop drivers"
+	depends on DVB_B2C2_FLEXCOP
+	help
+	  Say Y if you want to enable the module option to control debug messages
+	  of all B2C2 FlexCop drivers.
+
 config DVB_B2C2_SKYSTAR
 	tristate "B2C2/Technisat Air/Sky/CableStar 2 PCI"
 	depends on DVB_CORE && PCI

drivers/media/dvb/b2c2/Makefile

+b2c2-flexcop-objs = flexcop.o flexcop-fe-tuner.o flexcop-i2c.o \
+	flexcop-sram.o flexcop-eeprom.o flexcop-misc.o flexcop-hw-filter.o \
+	flexcop-dma.o
+obj-$(CONFIG_DVB_B2C2_FLEXCOP) += b2c2-flexcop.o
+
+b2c2-flexcop-pci-objs = flexcop-pci.o
+obj-$(CONFIG_DVB_B2C2_FLEXCOP_PCI) += b2c2-flexcop-pci.o
+
+b2c2-flexcop-usb-objs = flexcop-usb.o
+obj-$(CONFIG_DVB_B2C2_FLEXCOP_USB) += b2c2-flexcop-usb.o
+
 obj-$(CONFIG_DVB_B2C2_SKYSTAR) += skystar2.o
 
 EXTRA_CFLAGS = -Idrivers/media/dvb/dvb-core/ -Idrivers/media/dvb/frontends/

drivers/media/dvb/b2c2/flexcop-common.h

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-common.h - common header file for device-specific source files also.
+ *
+ * see flexcop.c for copyright information.
+ */
+#ifndef __FLEXCOP_COMMON_H__
+#define __FLEXCOP_COMMON_H__
+
+#include <linux/config.h>
+#include <linux/pci.h>
+
+#include "flexcop-reg.h"
+
+#include "dmxdev.h"
+#include "dvb_demux.h"
+#include "dvb_filter.h"
+#include "dvb_net.h"
+#include "dvb_frontend.h"
+
+#define FC_MAX_FEED 256
+
+#ifndef FC_LOG_PREFIX
+#warning please define a log prefix for your file, using a default one
+#define FC_LOG_PREFIX "b2c2-undef"
+#endif
+
+/* Steal from usb.h */
+#undef err
+#define err(format,  arg...) printk(KERN_ERR     FC_LOG_PREFIX ": " format "\n" , ## arg)
+#undef info
+#define info(format, arg...) printk(KERN_INFO    FC_LOG_PREFIX ": " format "\n" , ## arg)
+#undef warn
+#define warn(format, arg...) printk(KERN_WARNING FC_LOG_PREFIX ": " format "\n" , ## arg)
+
+struct flexcop_dma {
+	struct pci_dev *pdev;
+
+	u8 *cpu_addr0;
+	dma_addr_t dma_addr0;
+	u8 *cpu_addr1;
+	dma_addr_t dma_addr1;
+	u32 size; /* size of each address in bytes */
+};
+
+/* Control structure for data definitions that are common to
+ * the B2C2-based PCI and USB devices.
+ */
+struct flexcop_device {
+	/* general */
+	struct device *dev; /* for firmware_class */
+
+#define FC_STATE_DVB_INIT 0x01
+#define FC_STATE_I2C_INIT 0x02
+#define FC_STATE_FE_INIT  0x04
+	int init_state;
+
+	/* device information */
+	u8 mac_address[6];
+	int has_32_hw_pid_filter;
+	flexcop_revision_t rev;
+	flexcop_device_type_t dev_type;
+	flexcop_bus_t bus_type;
+
+	/* dvb stuff */
+	struct dvb_adapter dvb_adapter;
+	struct dvb_frontend *fe;
+	struct dvb_net dvbnet;
+	struct dvb_demux demux;
+	struct dmxdev dmxdev;
+	struct dmx_frontend hw_frontend;
+	struct dmx_frontend mem_frontend;
+	int (*fe_sleep) (struct dvb_frontend *);
+
+	struct i2c_adapter i2c_adap;
+	struct semaphore i2c_sem;
+
+	/* options and status */
+	int feedcount;
+	int pid_filtering;
+
+	/* bus specific callbacks */
+	flexcop_ibi_value (*read_ibi_reg)  (struct flexcop_device *, flexcop_ibi_register);
+	int               (*write_ibi_reg) (struct flexcop_device *, flexcop_ibi_register, flexcop_ibi_value);
+
+
+	int (*i2c_request) (struct flexcop_device*, flexcop_access_op_t, flexcop_i2c_port_t, u8 chipaddr, u8 addr, u8 *buf, u16 len);
+	int (*stream_control) (struct flexcop_device*, int);
+
+	int (*get_mac_addr) (struct flexcop_device *fc, int extended);
+
+	void *bus_specific;
+};
+
+/* exported prototypes */
+
+/* from flexcop.c */
+void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len);
+void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no);
+
+struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len);
+void flexcop_device_kfree(struct flexcop_device*);
+
+int  flexcop_device_initialize(struct flexcop_device*);
+void flexcop_device_exit(struct flexcop_device *fc);
+
+/* from flexcop-dma.c */
+int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size);
+void flexcop_dma_free(struct flexcop_dma *dma);
+
+int flexcop_dma_control_timer_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff);
+int flexcop_dma_control_size_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff);
+int flexcop_dma_control_packet_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff);
+int flexcop_dma_config(struct flexcop_device *fc, struct flexcop_dma *dma, flexcop_dma_index_t dma_idx,flexcop_dma_addr_index_t index);
+int flexcop_dma_config_timer(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 cycles);
+int flexcop_dma_config_packet_count(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 packets);
+
+/* from flexcop-eeprom.c */
+/* the PCI part uses this call to get the MAC address, the USB part has its own */
+int flexcop_eeprom_check_mac_addr(struct flexcop_device *fc, int extended);
+
+/* from flexcop-i2c.c */
+/* the PCI part uses this a i2c_request callback, whereas the usb part has its own
+ * one. We have it in flexcop-i2c.c, because it is going via the actual
+ * I2C-channel of the flexcop.
+ */
+int flexcop_i2c_request(struct flexcop_device*, flexcop_access_op_t,
+		        flexcop_i2c_port_t, u8 chipaddr, u8 addr, u8 *buf, u16 len);
+
+/* from flexcop-sram.c */
+int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, flexcop_sram_dest_target_t target);
+void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s);
+void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill);
+
+/* global prototypes for the flexcop-chip */
+/* from flexcop-fe-tuner.c */
+int flexcop_frontend_init(struct flexcop_device *card);
+void flexcop_frontend_exit(struct flexcop_device *fc);
+
+/* from flexcop-i2c.c */
+int flexcop_i2c_init(struct flexcop_device *fc);
+void flexcop_i2c_exit(struct flexcop_device *fc);
+
+/* from flexcop-sram.c */
+int flexcop_sram_init(struct flexcop_device *fc);
+
+/* from flexcop-misc.c */
+void flexcop_determine_revision(struct flexcop_device *fc);
+void flexcop_device_name(struct flexcop_device *fc,const char *prefix,const char *suffix);
+
+/* from flexcop-hw-filter.c */
+int flexcop_pid_feed_control(struct flexcop_device *fc, struct dvb_demux_feed *dvbdmxfeed, int onoff);
+void flexcop_hw_filter_init(struct flexcop_device *fc);
+
+void flexcop_smc_ctrl(struct flexcop_device *fc, int onoff);
+
+void flexcop_set_mac_filter(struct flexcop_device *fc, u8 mac[6]);
+void flexcop_mac_filter_ctrl(struct flexcop_device *fc, int onoff);
+
+#endif

drivers/media/dvb/b2c2/flexcop-dma.c

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-dma.c - methods for configuring and controlling the DMA of the FlexCop.
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size)
+{
+	u8 *tcpu;
+	dma_addr_t tdma;
+
+	if (size % 2) {
+		err("dma buffersize has to be even.");
+		return -EINVAL;
+	}
+
+	if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != NULL) {
+		dma->pdev = pdev;
+		dma->cpu_addr0 = tcpu;
+		dma->dma_addr0 = tdma;
+		dma->cpu_addr1 = tcpu + size/2;
+		dma->dma_addr1 = tdma + size/2;
+		dma->size = size/2;
+		return 0;
+	}
+	return -ENOMEM;
+}
+EXPORT_SYMBOL(flexcop_dma_allocate);
+
+void flexcop_dma_free(struct flexcop_dma *dma)
+{
+	pci_free_consistent(dma->pdev, dma->size*2,dma->cpu_addr0, dma->dma_addr0);
+	memset(dma,0,sizeof(struct flexcop_dma));
+}
+EXPORT_SYMBOL(flexcop_dma_free);
+
+int flexcop_dma_control_timer_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
+{
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
+
+	if (no & FC_DMA_1)
+		v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
+
+	if (no & FC_DMA_2)
+		v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
+
+	fc->write_ibi_reg(fc,ctrl_208,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
+
+int flexcop_dma_control_size_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
+{
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
+
+	if (no & FC_DMA_1)
+		v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
+
+	if (no & FC_DMA_2)
+		v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
+
+	fc->write_ibi_reg(fc,ctrl_208,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_control_size_irq);
+
+int flexcop_dma_control_packet_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
+{
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
+
+	if (no & FC_DMA_1)
+		v.ctrl_208.DMA1_Size_IRQ_Enable_sig = onoff;
+
+	if (no & FC_DMA_2)
+		v.ctrl_208.DMA2_Size_IRQ_Enable_sig = onoff;
+
+	fc->write_ibi_reg(fc,ctrl_208,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_control_packet_irq);
+
+int flexcop_dma_config(struct flexcop_device *fc, struct flexcop_dma *dma, flexcop_dma_index_t dma_idx,flexcop_dma_addr_index_t index)
+{
+
+	flexcop_ibi_value v0x0,v0x4,v0xc;
+	v0x0.raw = v0x4.raw = v0xc.raw = 0;
+
+	v0x0.dma_0x0.dma_address0        = dma->dma_addr0 >> 2;
+	v0xc.dma_0xc.dma_address1        = dma->dma_addr1 >> 2;
+	v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
+
+	if (index & FC_DMA_SUBADDR_0)
+		v0x0.dma_0x0.dma_0start = 1;
+
+	if (index & FC_DMA_SUBADDR_1)
+		v0xc.dma_0xc.dma_1start = 1;
+
+	if (dma_idx & FC_DMA_1) {
+		fc->write_ibi_reg(fc,dma1_000,v0x0);
+		fc->write_ibi_reg(fc,dma1_004,v0x4);
+		fc->write_ibi_reg(fc,dma1_00c,v0xc);
+	} else { /* (dma_idx & FC_DMA_2) */
+		fc->write_ibi_reg(fc,dma2_010,v0x0);
+		fc->write_ibi_reg(fc,dma2_014,v0x4);
+		fc->write_ibi_reg(fc,dma2_01c,v0xc);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_config);
+
+static int flexcop_dma_remap(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, int onoff)
+{
+	flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
+	v.dma_0xc.remap_enable = onoff;
+	fc->write_ibi_reg(fc,r,v);
+	return 0;
+}
+
+/* 1 cycles = 1.97 msec */
+int flexcop_dma_config_timer(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 cycles)
+{
+	flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
+
+	flexcop_dma_remap(fc,dma_idx,0);
+
+	v.dma_0x4_write.dmatimer = cycles >> 1;
+	fc->write_ibi_reg(fc,r,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_config_timer);
+
+int flexcop_dma_config_packet_count(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 packets)
+{
+	flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
+
+	flexcop_dma_remap(fc,dma_idx,1);
+
+	v.dma_0x4_remap.DMA_maxpackets = packets;
+	fc->write_ibi_reg(fc,r,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_config_packet_count);

drivers/media/dvb/b2c2/flexcop-eeprom.c

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-eeprom.c - eeprom access methods (currently only MAC address reading is used)
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+#if 0
+/*EEPROM (Skystar2 has one "24LC08B" chip on board) */
+static int eeprom_write(struct adapter *adapter, u16 addr, u8 *buf, u16 len)
+{
+	return flex_i2c_write(adapter, 0x20000000, 0x50, addr, buf, len);
+}
+
+static int eeprom_lrc_write(struct adapter *adapter, u32 addr, u32 len, u8 *wbuf, u8 *rbuf, int retries)
+{
+	int i;
+
+	for (i = 0; i < retries; i++) {
+		if (eeprom_write(adapter, addr, wbuf, len) == len) {
+			if (eeprom_lrc_read(adapter, addr, len, rbuf, retries) == 1)
+				return 1;
+		}
+	}
+
+	return 0;
+}
+
+/* These functions could be used to unlock SkyStar2 cards. */
+
+static int eeprom_writeKey(struct adapter *adapter, u8 *key, u32 len)
+{
+	u8 rbuf[20];
+	u8 wbuf[20];
+
+	if (len != 16)
+		return 0;
+
+	memcpy(wbuf, key, len);
+
+	wbuf[16] = 0;
+	wbuf[17] = 0;
+	wbuf[18] = 0;
+	wbuf[19] = calc_lrc(wbuf, 19);
+
+	return eeprom_lrc_write(adapter, 0x3e4, 20, wbuf, rbuf, 4);
+}
+
+static int eeprom_readKey(struct adapter *adapter, u8 *key, u32 len)
+{
+	u8 buf[20];
+
+	if (len != 16)
+		return 0;
+
+	if (eeprom_lrc_read(adapter, 0x3e4, 20, buf, 4) == 0)
+		return 0;
+
+	memcpy(key, buf, len);
+
+	return 1;
+}
+
+static char eeprom_set_mac_addr(struct adapter *adapter, char type, u8 *mac)
+{
+	u8 tmp[8];
+
+	if (type != 0) {
+		tmp[0] = mac[0];
+		tmp[1] = mac[1];
+		tmp[2] = mac[2];
+		tmp[3] = mac[5];
+		tmp[4] = mac[6];
+		tmp[5] = mac[7];
+
+	} else {
+
+		tmp[0] = mac[0];
+		tmp[1] = mac[1];
+		tmp[2] = mac[2];
+		tmp[3] = mac[3];
+		tmp[4] = mac[4];
+		tmp[5] = mac[5];
+	}
+
+	tmp[6] = 0;
+	tmp[7] = calc_lrc(tmp, 7);
+
+	if (eeprom_write(adapter, 0x3f8, tmp, 8) == 8)
+		return 1;
+
+	return 0;
+}
+
+static int flexcop_eeprom_read(struct flexcop_device *fc, u16 addr, u8 *buf, u16 len)
+{
+	return fc->i2c_request(fc,FC_READ,FC_I2C_PORT_EEPROM,0x50,addr,buf,len);
+}
+
+#endif
+
+static u8 calc_lrc(u8 *buf, int len)
+{
+	int i;
+	u8 sum = 0;
+	for (i = 0; i < len; i++)
+		sum = sum ^ buf[i];
+	return sum;
+}
+
+static int flexcop_eeprom_request(struct flexcop_device *fc, flexcop_access_op_t op, u16 addr, u8 *buf, u16 len, int retries)
+{
+	int i,ret = 0;
+	u8 chipaddr =  0x50 | ((addr >> 8) & 3);
+	for (i = 0; i < retries; i++)
+		if ((ret = fc->i2c_request(fc,op,FC_I2C_PORT_EEPROM,chipaddr,addr & 0xff,buf,len)) == 0)
+			break;
+	return ret;
+}
+
+static int flexcop_eeprom_lrc_read(struct flexcop_device *fc, u16 addr, u8 *buf, u16 len, int retries)
+{
+	int ret = flexcop_eeprom_request(fc,FC_READ,addr,buf,len,retries);
+	if (ret == 0)
+		if (calc_lrc(buf, len - 1) != buf[len - 1])
+			ret = -EINVAL;
+	return ret;
+}
+
+/* TODO how is it handled in USB */
+
+/* JJ's comment about extended == 1: it is not presently used anywhere but was
+ * added to the low-level functions for possible support of EUI64
+ */
+int flexcop_eeprom_check_mac_addr(struct flexcop_device *fc, int extended)
+{
+	u8 buf[8];
+	int ret = 0;
+
+	memset(fc->mac_address,0,6);
+
+	if ((ret = flexcop_eeprom_lrc_read(fc,0x3f8,buf,8,4)) == 0) {
+		if (extended != 0) {
+			err("TODO: extended (EUI64) MAC addresses aren't completely supported yet");
+			ret = -EINVAL;
+/*			memcpy(fc->mac_address,buf,3);
+			mac[3] = 0xfe;
+			mac[4] = 0xff;
+			memcpy(&fc->mac_address[3],&buf[5],3); */
+		} else
+			memcpy(fc->mac_address,buf,6);
+	}
+	return ret;
+}
+EXPORT_SYMBOL(flexcop_eeprom_check_mac_addr);

drivers/media/dvb/b2c2/flexcop-hw-filter.c

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-hw-filter.c - pid and mac address filtering and corresponding control functions.
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+static void flexcop_rcv_data_ctrl(struct flexcop_device *fc, int onoff)
+{
+	flexcop_set_ibi_value(ctrl_208,Rcv_Data_sig,onoff);
+}
+
+void flexcop_smc_ctrl(struct flexcop_device *fc, int onoff)
+{
+	flexcop_set_ibi_value(ctrl_208,SMC_Enable_sig,onoff);
+}
+
+void flexcop_null_filter_ctrl(struct flexcop_device *fc, int onoff)
+{
+	flexcop_set_ibi_value(ctrl_208,Null_filter_sig,onoff);
+}
+
+void flexcop_set_mac_filter(struct flexcop_device *fc, u8 mac[6])
+{
+	flexcop_ibi_value v418,v41c;
+	v41c = fc->read_ibi_reg(fc,mac_address_41c);
+
+	v418.mac_address_418.MAC1 = mac[0];
+	v418.mac_address_418.MAC2 = mac[1];
+	v418.mac_address_418.MAC3 = mac[2];
+	v418.mac_address_418.MAC6 = mac[3];
+	v41c.mac_address_41c.MAC7 = mac[4];
+	v41c.mac_address_41c.MAC8 = mac[5];
+
+	fc->write_ibi_reg(fc,mac_address_418,v418);
+	fc->write_ibi_reg(fc,mac_address_41c,v41c);
+}
+
+void flexcop_mac_filter_ctrl(struct flexcop_device *fc, int onoff)
+{
+	flexcop_set_ibi_value(ctrl_208,MAC_filter_Mode_sig,onoff);
+}
+
+static void flexcop_pid_group_filter(struct flexcop_device *fc, u16 pid, u16 mask)
+{
+	/* index_reg_310.extra_index_reg need to 0 or 7 to work */
+	flexcop_ibi_value v30c;
+	v30c.pid_filter_30c_ext_ind_0_7.Group_PID = pid;
+	v30c.pid_filter_30c_ext_ind_0_7.Group_mask = mask;
+	fc->write_ibi_reg(fc,pid_filter_30c,v30c);
+}
+
+static void flexcop_pid_group_filter_ctrl(struct flexcop_device *fc, int onoff)
+{
+	flexcop_set_ibi_value(ctrl_208,Mask_filter_sig,onoff);
+}
+
+/* this fancy define reduces the code size of the quite similar PID controlling of
+ * the first 6 PIDs
+ */
+
+#define pid_ctrl(vregname,field,enablefield,trans_field,transval) \
+	flexcop_ibi_value vpid = fc->read_ibi_reg(fc, vregname), \
+					  v208 = fc->read_ibi_reg(fc, ctrl_208); \
+\
+	vpid.vregname.field = onoff ? pid : 0x1fff; \
+	vpid.vregname.trans_field = transval; \
+	v208.ctrl_208.enablefield = onoff; \
+\
+	fc->write_ibi_reg(fc,vregname,vpid); \
+	fc->write_ibi_reg(fc,ctrl_208,v208);
+
+static void flexcop_pid_Stream1_PID_ctrl(struct flexcop_device *fc, u16 pid, int onoff)
+{
+	pid_ctrl(pid_filter_300,Stream1_PID,Stream1_filter_sig,Stream1_trans,0);
+}
+
+static void flexcop_pid_Stream2_PID_ctrl(struct flexcop_device *fc, u16 pid, int onoff)
+{
+	pid_ctrl(pid_filter_300,Stream2_PID,Stream2_filter_sig,Stream2_trans,0);
+}
+
+static void flexcop_pid_PCR_PID_ctrl(struct flexcop_device *fc, u16 pid, int onoff)
+{
+	pid_ctrl(pid_filter_304,PCR_PID,PCR_filter_sig,PCR_trans,0);
+}
+
+static void flexcop_pid_PMT_PID_ctrl(struct flexcop_device *fc, u16 pid, int onoff)
+{
+	pid_ctrl(pid_filter_304,PMT_PID,PMT_filter_sig,PMT_trans,0);
+}
+
+static void flexcop_pid_EMM_PID_ctrl(struct flexcop_device *fc, u16 pid, int onoff)
+{
+	pid_ctrl(pid_filter_308,EMM_PID,EMM_filter_sig,EMM_trans,0);
+}
+
+static void flexcop_pid_ECM_PID_ctrl(struct flexcop_device *fc, u16 pid, int onoff)
+{
+	pid_ctrl(pid_filter_308,ECM_PID,ECM_filter_sig,ECM_trans,0);
+}
+
+static void flexcop_pid_control(struct flexcop_device *fc, int index, u16 pid,int onoff)
+{
+	deb_ts("setting pid: %5d %04x at index %d '%s'\n",pid,pid,index,onoff ? "on" : "off");
+
+	/* We could use bit magic here to reduce source code size.
+	 * I decided against it, but to use the real register names */
+	switch (index) {
+		case 0: flexcop_pid_Stream1_PID_ctrl(fc,pid,onoff); break;
+		case 1: flexcop_pid_Stream2_PID_ctrl(fc,pid,onoff); break;
+		case 2: flexcop_pid_PCR_PID_ctrl(fc,pid,onoff); break;
+		case 3: flexcop_pid_PMT_PID_ctrl(fc,pid,onoff); break;
+		case 4: flexcop_pid_EMM_PID_ctrl(fc,pid,onoff); break;
+		case 5:	flexcop_pid_ECM_PID_ctrl(fc,pid,onoff); break;
+		default:
+			if (fc->has_32_hw_pid_filter && index < 38) {
+				flexcop_ibi_value vpid,vid;
+
+				/* set the index */
+				vid = fc->read_ibi_reg(fc,index_reg_310);
+				vid.index_reg_310.index_reg = index - 6;
+				fc->write_ibi_reg(fc,index_reg_310, vid);
+
+				vpid = fc->read_ibi_reg(fc,pid_n_reg_314);
+				vpid.pid_n_reg_314.PID = onoff ? pid : 0x1fff;
+				vpid.pid_n_reg_314.PID_enable_bit = onoff;
+				fc->write_ibi_reg(fc,pid_n_reg_314, vpid);
+			}
+			break;
+	}
+}
+
+int flexcop_pid_feed_control(struct flexcop_device *fc, struct dvb_demux_feed *dvbdmxfeed, int onoff)
+{
+	int max_pid_filter = 6 + fc->has_32_hw_pid_filter*32;
+
+	fc->feedcount += (onoff ? 1 : -1);
+
+	/* when doing hw pid filtering, set the pid */
+	if (fc->pid_filtering)
+		flexcop_pid_control(fc,dvbdmxfeed->index,dvbdmxfeed->pid,onoff);
+
+	/* if it was the first feed request */
+	if (fc->feedcount == onoff && onoff) {
+		if (!fc->pid_filtering) {
+			deb_ts("enabling full TS transfer\n");
+			flexcop_pid_group_filter(fc, 0,0);
+			flexcop_pid_group_filter_ctrl(fc,1);
+		}
+
+		if (fc->stream_control)
+			fc->stream_control(fc,1);
+		flexcop_rcv_data_ctrl(fc,1);
+
+	/* if there is no more feed left to feed */
+	} else if (fc->feedcount == onoff && !onoff) {
+		if (!fc->pid_filtering) {
+			deb_ts("disabling full TS transfer\n");
+			flexcop_pid_group_filter(fc, 0x1fe0,0);
+			flexcop_pid_group_filter_ctrl(fc,0);
+		}
+
+		flexcop_rcv_data_ctrl(fc,0);
+		if (fc->stream_control)
+			fc->stream_control(fc,0);
+	}
+
+	/* if pid_filtering is on and more pids than the hw-filter can provide are
+	 * requested enable the whole bandwidth.
+	 */
+	if (fc->pid_filtering && fc->feedcount > max_pid_filter) {
+		flexcop_pid_group_filter(fc, 0,0);
+		flexcop_pid_group_filter_ctrl(fc,1);
+	} else if (fc->pid_filtering && fc->feedcount <= max_pid_filter) {
+		flexcop_pid_group_filter(fc, 0x1fe0,0);
+		flexcop_pid_group_filter_ctrl(fc,0);
+	}
+
+	return 0;
+}
+
+void flexcop_hw_filter_init(struct flexcop_device *fc)
+{
+	int i;
+	flexcop_ibi_value v;
+	for (i = 0; i < 6 + 32*fc->has_32_hw_pid_filter; i++)
+		flexcop_pid_control(fc,i,0x1fff,0);
+
+	flexcop_pid_group_filter(fc, 0x1fe0,0);
+
+	v = fc->read_ibi_reg(fc,pid_filter_308);
+	v.pid_filter_308.EMM_filter_4 = 1;
+	v.pid_filter_308.EMM_filter_6 = 0;
+	fc->write_ibi_reg(fc,pid_filter_308,v);
+}

drivers/media/dvb/b2c2/flexcop-i2c.c

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-i2c.c - flexcop internal 2Wire bus (I2C) and dvb i2c initialization
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+#define FC_MAX_I2C_RETRIES 100000
+
+static int flexcop_i2c_operation(struct flexcop_device *fc, flexcop_ibi_value *r100, int max_ack_errors)
+{
+	int i,ack_errors = 0;
+	flexcop_ibi_value r;
+
+	r100->tw_sm_c_100.working_start = 1;
+	deb_i2c("r100 before: %08x\n",r100->raw);
+
+	fc->write_ibi_reg(fc, tw_sm_c_100, ibi_zero);
+	fc->write_ibi_reg(fc, tw_sm_c_100, *r100); /* initiating i2c operation */
+
+	for (i = 0; i < FC_MAX_I2C_RETRIES; i++) {
+		r = fc->read_ibi_reg(fc, tw_sm_c_100);
+
+		if (!r.tw_sm_c_100.no_base_addr_ack_error) {
+			if (r.tw_sm_c_100.st_done) {  /* && !r.tw_sm_c_100.working_start */
+				*r100 = r;
+				deb_i2c("i2c success\n");
+				return 0;
+			}
+		} else {
+			deb_i2c("suffering from an i2c ack_error\n");
+			if (++ack_errors >= max_ack_errors)
+				break;
+
+			fc->write_ibi_reg(fc, tw_sm_c_100, ibi_zero);
+			fc->write_ibi_reg(fc, tw_sm_c_100, *r100);
+		}
+	}
+	deb_i2c("tried %d times i2c operation, never finished or too many ack errors.\n",i);
+	return -EREMOTEIO;
+}
+
+static int flexcop_i2c_read4(struct flexcop_device *fc, flexcop_ibi_value r100, u8 *buf)
+{
+	flexcop_ibi_value r104;
+	int len = r100.tw_sm_c_100.total_bytes, /* remember total_bytes is buflen-1 */
+		ret;
+
+	if ((ret = flexcop_i2c_operation(fc,&r100,30)) != 0)
+		return ret;
+
+	r104 = fc->read_ibi_reg(fc,tw_sm_c_104);
+
+	deb_i2c("read: r100: %08x, r104: %08x\n",r100.raw,r104.raw);
+
+	/* there is at least one byte, otherwise we wouldn't be here */
+	buf[0] = r100.tw_sm_c_100.data1_reg;
+
+	if (len > 0) buf[1] = r104.tw_sm_c_104.data2_reg;
+	if (len > 1) buf[2] = r104.tw_sm_c_104.data3_reg;
+	if (len > 2) buf[3] = r104.tw_sm_c_104.data4_reg;
+
+	return 0;
+}
+
+static int flexcop_i2c_write4(struct flexcop_device *fc, flexcop_ibi_value r100, u8 *buf)
+{
+	flexcop_ibi_value r104;
+	int len = r100.tw_sm_c_100.total_bytes; /* remember total_bytes is buflen-1 */
+	r104.raw = 0;
+
+	/* there is at least one byte, otherwise we wouldn't be here */
+	r100.tw_sm_c_100.data1_reg = buf[0];
+
+	r104.tw_sm_c_104.data2_reg = len > 0 ? buf[1] : 0;
+	r104.tw_sm_c_104.data3_reg = len > 1 ? buf[2] : 0;
+	r104.tw_sm_c_104.data4_reg = len > 2 ? buf[3] : 0;
+
+	deb_i2c("write: r100: %08x, r104: %08x\n",r100.raw,r104.raw);
+
+	/* write the additional i2c data before doing the actual i2c operation */
+	fc->write_ibi_reg(fc,tw_sm_c_104,r104);
+
+	return flexcop_i2c_operation(fc,&r100,30);
+}
+
+/* master xfer callback for demodulator */
+static int flexcop_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+{
+	struct flexcop_device *fc = i2c_get_adapdata(i2c_adap);
+	int i, ret = 0;
+
+	if (down_interruptible(&fc->i2c_sem))
+		return -ERESTARTSYS;
+
+	/* reading */
+	if (num == 2 &&
+		msgs[0].flags == 0 &&
+		msgs[1].flags == I2C_M_RD &&
+		msgs[0].buf != NULL &&
+		msgs[1].buf != NULL) {
+
+		ret = fc->i2c_request(fc, FC_READ, FC_I2C_PORT_DEMOD, msgs[0].addr, msgs[0].buf[0], msgs[1].buf, msgs[1].len);
+
+	} else for (i = 0; i < num; i++) { /* writing command */
+		if (msgs[i].flags != 0 || msgs[i].buf == NULL || msgs[i].len < 2) {
+			ret = -EINVAL;
+			break;
+		}
+
+		ret = fc->i2c_request(fc, FC_WRITE, FC_I2C_PORT_DEMOD, msgs[i].addr, msgs[i].buf[0], &msgs[i].buf[1], msgs[i].len - 1);
+	}
+
+	if (ret < 0)
+		err("i2c master_xfer failed");
+	else
+		ret = num;
+
+	up(&fc->i2c_sem);
+
+	return ret;
+}
+
+int flexcop_i2c_request(struct flexcop_device *fc, flexcop_access_op_t op,
+		flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u16 len)
+{
+	int ret;
+	u16 bytes_to_transfer;
+	flexcop_ibi_value r100;
+
+	deb_i2c("op = %d\n",op);
+	r100.raw = 0;
+	r100.tw_sm_c_100.chipaddr = chipaddr;
+	r100.tw_sm_c_100.twoWS_rw = op;
+	r100.tw_sm_c_100.twoWS_port_reg = port;
+
+	while (len != 0) {
+		bytes_to_transfer = len > 4 ? 4 : len;
+
+		r100.tw_sm_c_100.total_bytes = bytes_to_transfer - 1;
+		r100.tw_sm_c_100.baseaddr = addr;
+
+		if (op == FC_READ)
+			ret = flexcop_i2c_read4(fc, r100, buf);
+		else
+			ret = flexcop_i2c_write4(fc,r100, buf);
+
+		if (ret < 0)
+			return ret;
+
+		buf  += bytes_to_transfer;
+		addr += bytes_to_transfer;
+		len  -= bytes_to_transfer;
+	};
+
+	return 0;
+}
+/* exported for PCI i2c */
+EXPORT_SYMBOL(flexcop_i2c_request);
+
+static u32 flexcop_i2c_func(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C;
+}
+
+static struct i2c_algorithm flexcop_algo = {
+	.name			= "FlexCop I2C algorithm",
+	.id				= I2C_ALGO_BIT,
+	.master_xfer	= flexcop_master_xfer,
+	.functionality	= flexcop_i2c_func,
+};
+
+int flexcop_i2c_init(struct flexcop_device *fc)
+{
+	int ret;
+
+	sema_init(&fc->i2c_sem,1);
+
+	memset(&fc->i2c_adap, 0, sizeof(struct i2c_adapter));
+	strncpy(fc->i2c_adap.name, "B2C2 FlexCop device",I2C_NAME_SIZE);
+
+	i2c_set_adapdata(&fc->i2c_adap,fc);
+
+	fc->i2c_adap.class	    = I2C_CLASS_TV_DIGITAL;
+	fc->i2c_adap.algo       = &flexcop_algo;
+	fc->i2c_adap.algo_data  = NULL;
+	fc->i2c_adap.id         = I2C_ALGO_BIT;
+
+	if ((ret = i2c_add_adapter(&fc->i2c_adap)) < 0)
+		return ret;
+
+	fc->init_state |= FC_STATE_I2C_INIT;
+	return 0;
+}
+
+void flexcop_i2c_exit(struct flexcop_device *fc)
+{
+	if (fc->init_state & FC_STATE_I2C_INIT)
+		i2c_del_adapter(&fc->i2c_adap);
+
+	fc->init_state &= ~FC_STATE_I2C_INIT;
+}

drivers/media/dvb/b2c2/flexcop-misc.c

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-misc.c - miscellaneous functions.
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+void flexcop_determine_revision(struct flexcop_device *fc)
+{
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,misc_204);
+
+	switch (v.misc_204.Rev_N_sig_revision_hi) {
+		case 0x2:
+			deb_info("found a FlexCopII.\n");
+			fc->rev = FLEXCOP_II;
+			break;
+		case 0x3:
+			deb_info("found a FlexCopIIb.\n");
+			fc->rev = FLEXCOP_IIB;
+			break;
+		case 0x0:
+			deb_info("found a FlexCopIII.\n");
+			fc->rev = FLEXCOP_III;
+			break;
+		default:
+			err("unkown FlexCop Revision: %x. Please report the linux-dvb@linuxtv.org.",v.misc_204.Rev_N_sig_revision_hi);
+			break;
+	}
+
+	if ((fc->has_32_hw_pid_filter = v.misc_204.Rev_N_sig_caps))
+		deb_info("this FlexCop has the additional 32 hardware pid filter.\n");
+	else
+		deb_info("this FlexCop has only the 6 basic main hardware pid filter.\n");
+	/* bus parts have to decide if hw pid filtering is used or not. */
+}
+
+const char *flexcop_revision_names[] = {
+	"Unkown chip",
+	"FlexCopII",
+	"FlexCopIIb",
+	"FlexCopIII",
+};
+
+const char *flexcop_device_names[] = {
+	"Unkown device",
+	"AirStar 2 DVB-T",
+	"AirStar 2 ATSC",
+	"SkyStar 2 DVB-S",
+	"SkyStar 2 DVB-S (old version)",
+	"CableStar 2 DVB-C",
+};
+
+const char *flexcop_bus_names[] = {
+	"USB",
+	"PCI",
+};
+
+void flexcop_device_name(struct flexcop_device *fc,const char *prefix,const
+		char *suffix)
+{
+	info("%s '%s' at the '%s' bus controlled by a '%s' %s",prefix,
+			flexcop_device_names[fc->dev_type],flexcop_bus_names[fc->bus_type],
+			flexcop_revision_names[fc->rev],suffix);
+}

drivers/media/dvb/b2c2/flexcop-sram.c

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-sram.c - functions for controlling the SRAM.
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+static void flexcop_sram_set_chip (struct flexcop_device *fc, flexcop_sram_type_t type)
+{
+	flexcop_set_ibi_value(wan_ctrl_reg_71c,sram_chip,type);
+}
+
+int flexcop_sram_init(struct flexcop_device *fc)
+{
+	switch (fc->rev) {
+		case FLEXCOP_II:
+		case FLEXCOP_IIB:
+			flexcop_sram_set_chip(fc,FC_SRAM_1_32KB);
+			break;
+		case FLEXCOP_III:
+			flexcop_sram_set_chip(fc,FC_SRAM_1_48KB);
+			break;
+		default:
+			return -EINVAL;
+	}
+	return 0;
+}
+
+int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, flexcop_sram_dest_target_t target)
+{
+	flexcop_ibi_value v;
+
+	v = fc->read_ibi_reg(fc,sram_dest_reg_714);
+
+	if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
+		err("SRAM destination target to available on FlexCopII(b)\n");
+		return -EINVAL;
+	}
+
+	deb_sram("sram dest: %x target: %x\n",dest, target);
+
+	if (dest & FC_SRAM_DEST_NET)
+		v.sram_dest_reg_714.NET_Dest = target;
+	if (dest & FC_SRAM_DEST_CAI)
+		v.sram_dest_reg_714.CAI_Dest = target;
+	if (dest & FC_SRAM_DEST_CAO)
+		v.sram_dest_reg_714.CAO_Dest = target;
+	if (dest & FC_SRAM_DEST_MEDIA)
+		v.sram_dest_reg_714.MEDIA_Dest = target;
+
+	fc->write_ibi_reg(fc,sram_dest_reg_714,v);
+	udelay(1000); /* TODO delay really necessary */
+
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_sram_set_dest);
+
+void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s)
+{
+	flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s);
+}
+EXPORT_SYMBOL(flexcop_wan_set_speed);
+
+void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill)
+{
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
+	v.sram_dest_reg_714.ctrl_usb_wan = usb_wan;
+	v.sram_dest_reg_714.ctrl_sramdma = sramdma;
+	v.sram_dest_reg_714.ctrl_maximumfill = maximumfill;
+	fc->write_ibi_reg(fc,sram_dest_reg_714,v);
+}
+EXPORT_SYMBOL(flexcop_sram_ctrl);
+
+#if 0
+static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
+{
+	int i, retries;
+	u32 command;
+
+	for (i = 0; i < len; i++) {
+		command = bank | addr | 0x04000000 | (*buf << 0x10);
+
+		retries = 2;
+
+		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
+			mdelay(1);
+			retries--;
+		};
+
+		if (retries == 0)
+			printk("%s: SRAM timeout\n", __FUNCTION__);
+
+		write_reg_dw(adapter, 0x700, command);
+
+		buf++;
+		addr++;
+	}
+}
+
+static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
+{
+	int i, retries;
+	u32 command, value;
+
+	for (i = 0; i < len; i++) {
+		command = bank | addr | 0x04008000;
+
+		retries = 10000;
+
+		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
+			mdelay(1);
+			retries--;
+		};
+
+		if (retries == 0)
+			printk("%s: SRAM timeout\n", __FUNCTION__);
+
+		write_reg_dw(adapter, 0x700, command);
+
+		retries = 10000;
+
+		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
+			mdelay(1);
+			retries--;
+		};
+
+		if (retries == 0)
+			printk("%s: SRAM timeout\n", __FUNCTION__);
+
+		value = read_reg_dw(adapter, 0x700) >> 0x10;
+
+		*buf = (value & 0xff);
+
+		addr++;
+		buf++;
+	}
+}
+
+static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
+{
+	u32 bank;
+
+	bank = 0;
+
+	if (adapter->dw_sram_type == 0x20000) {
+		bank = (addr & 0x18000) << 0x0d;
+	}
+
+	if (adapter->dw_sram_type == 0x00000) {
+		if ((addr >> 0x0f) == 0)
+			bank = 0x20000000;
+		else
+			bank = 0x10000000;
+	}
+
+	flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
+}
+
+static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
+{
+	u32 bank;
+
+	bank = 0;
+
+	if (adapter->dw_sram_type == 0x20000) {
+		bank = (addr & 0x18000) << 0x0d;
+	}
+
+	if (adapter->dw_sram_type == 0x00000) {
+		if ((addr >> 0x0f) == 0)
+			bank = 0x20000000;
+		else
+			bank = 0x10000000;
+	}
+
+	flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
+}
+
+static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
+{
+	u32 length;
+
+	while (len != 0) {
+		length = len;
+
+		// check if the address range belongs to the same
+		// 32K memory chip. If not, the data is read from
+		// one chip at a time.
+		if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
+			length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
+		}
+
+		sram_read_chunk(adapter, addr, buf, length);
+
+		addr = addr + length;
+		buf = buf + length;
+		len = len - length;
+	}
+}
+
+static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
+{
+	u32 length;
+
+	while (len != 0) {
+		length = len;
+
+		// check if the address range belongs to the same
+		// 32K memory chip. If not, the data is written to
+		// one chip at a time.
+		if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
+			length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
+		}
+
+		sram_write_chunk(adapter, addr, buf, length);
+
+		addr = addr + length;
+		buf = buf + length;
+		len = len - length;
+	}
+}
+
+static void sram_set_size(struct adapter *adapter, u32 mask)
+{
+	write_reg_dw(adapter, 0x71c, (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
+}
+
+static void sram_init(struct adapter *adapter)
+{
+	u32 tmp;
+
+	tmp = read_reg_dw(adapter, 0x71c);
+
+	write_reg_dw(adapter, 0x71c, 1);
+
+	if (read_reg_dw(adapter, 0x71c) != 0) {
+		write_reg_dw(adapter, 0x71c, tmp);
+
+		adapter->dw_sram_type = tmp & 0x30000;
+
+		ddprintk("%s: dw_sram_type = %x\n", __FUNCTION__, adapter->dw_sram_type);
+
+	} else {
+
+		adapter->dw_sram_type = 0x10000;
+
+		ddprintk("%s: dw_sram_type = %x\n", __FUNCTION__, adapter->dw_sram_type);
+	}
+
+	/* return value is never used? */
+/*	return adapter->dw_sram_type; */
+}
+
+static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
+{
+	u8 tmp1, tmp2;
+
+	dprintk("%s: mask = %x, addr = %x\n", __FUNCTION__, mask, addr);
+
+	sram_set_size(adapter, mask);
+	sram_init(adapter);
+
+	tmp2 = 0xa5;
+	tmp1 = 0x4f;
+
+	sram_write(adapter, addr, &tmp2, 1);
+	sram_write(adapter, addr + 4, &tmp1, 1);
+
+	tmp2 = 0;
+
+	mdelay(20);
+
+	sram_read(adapter, addr, &tmp2, 1);
+	sram_read(adapter, addr, &tmp2, 1);
+
+	dprintk("%s: wrote 0xa5, read 0x%2x\n", __FUNCTION__, tmp2);
+
+	if (tmp2 != 0xa5)
+		return 0;
+
+	tmp2 = 0x5a;
+	tmp1 = 0xf4;
+
+	sram_write(adapter, addr, &tmp2, 1);
+	sram_write(adapter, addr + 4, &tmp1, 1);
+
+	tmp2 = 0;
+
+	mdelay(20);
+
+	sram_read(adapter, addr, &tmp2, 1);
+	sram_read(adapter, addr, &tmp2, 1);
+
+	dprintk("%s: wrote 0x5a, read 0x%2x\n", __FUNCTION__, tmp2);
+
+	if (tmp2 != 0x5a)
+		return 0;
+
+	return 1;
+}
+
+static u32 sram_length(struct adapter *adapter)
+{
+	if (adapter->dw_sram_type == 0x10000)
+		return 32768;	//  32K
+	if (adapter->dw_sram_type == 0x00000)
+		return 65536;	//  64K
+	if (adapter->dw_sram_type == 0x20000)
+		return 131072;	// 128K
+
+	return 32768;		// 32K
+}
+
+/* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
+    - for 128K there are 4x32K chips at bank 0,1,2,3.
+    - for  64K there are 2x32K chips at bank 1,2.
+    - for  32K there is one 32K chip at bank 0.
+
+   FlexCop works only with one bank at a time. The bank is selected
+   by bits 28-29 of the 0x700 register.
+
+   bank 0 covers addresses 0x00000-0x07fff
+   bank 1 covers addresses 0x08000-0x0ffff
+   bank 2 covers addresses 0x10000-0x17fff
+   bank 3 covers addresses 0x18000-0x1ffff
+*/
+
+static int flexcop_sram_detect(struct flexcop_device *fc)
+{
+	flexcop_ibi_value r208,r71c_0,vr71c_1;
+
+	r208 = fc->read_ibi_reg(fc, ctrl_208);
+	fc->write_ibi_reg(fc, ctrl_208, ibi_zero);
+
+	r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);
+
+	write_reg_dw(adapter, 0x71c, 1);
+
+	tmp3 = read_reg_dw(adapter, 0x71c);
+
+	dprintk("%s: tmp3 = %x\n", __FUNCTION__, tmp3);
+
+	write_reg_dw(adapter, 0x71c, tmp2);
+
+	// check for internal SRAM ???
+	tmp3--;
+	if (tmp3 != 0) {
+		sram_set_size(adapter, 0x10000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 32K\n", __FUNCTION__);
+
+		return 32;
+	}
+
+	if (sram_test_location(adapter, 0x20000, 0x18000) != 0) {
+		sram_set_size(adapter, 0x20000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 128K\n", __FUNCTION__);
+
+		return 128;
+	}
+
+	if (sram_test_location(adapter, 0x00000, 0x10000) != 0) {
+		sram_set_size(adapter, 0x00000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 64K\n", __FUNCTION__);
+
+		return 64;
+	}
+
+	if (sram_test_location(adapter, 0x10000, 0x00000) != 0) {
+		sram_set_size(adapter, 0x10000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 32K\n", __FUNCTION__);
+
+		return 32;
+	}
+
+	sram_set_size(adapter, 0x10000);
+	sram_init(adapter);
+	write_reg_dw(adapter, 0x208, tmp);
+
+	dprintk("%s: SRAM detection failed. Set to 32K \n", __FUNCTION__);
+
+	return 0;
+}
+
+static void sll_detect_sram_size(struct adapter *adapter)
+{
+	sram_detect_for_flex2(adapter);
+}
+
+#endif

drivers/media/dvb/b2c2/flexcop-usb.h

+#ifndef __FLEXCOP_USB_H_INCLUDED__
+#define __FLEXCOP_USB_H_INCLUDED__
+
+#include <linux/usb.h>
+
+/* transfer parameters */
+#define B2C2_USB_FRAMES_PER_ISO		4
+#define B2C2_USB_NUM_ISO_URB		4
+
+#define B2C2_USB_CTRL_PIPE_IN		usb_rcvctrlpipe(fc_usb->udev,0)
+#define B2C2_USB_CTRL_PIPE_OUT		usb_sndctrlpipe(fc_usb->udev,0)
+#define B2C2_USB_DATA_PIPE			usb_rcvisocpipe(fc_usb->udev,0x81)
+
+struct flexcop_usb {
+	struct usb_device *udev;
+	struct usb_interface *uintf;
+
+	u8 *iso_buffer;
+	int buffer_size;
+	dma_addr_t dma_addr;
+	struct urb *iso_urb[B2C2_USB_NUM_ISO_URB];
+
+	struct flexcop_device *fc_dev;
+};
+
+#if 0
+/* request types TODO What is its use?*/
+typedef enum {
+
+/* something is wrong with this part
+	RTYPE_READ_DW         = (1 << 6),
+	RTYPE_WRITE_DW_1      = (3 << 6),
+	RTYPE_READ_V8_MEMORY  = (6 << 6),
+	RTYPE_WRITE_V8_MEMORY = (7 << 6),
+	RTYPE_WRITE_V8_FLASH  = (8 << 6),
+	RTYPE_GENERIC         = (9 << 6),
+*/
+} flexcop_usb_request_type_t;
+#endif
+
+/* request */
+typedef enum {
+	B2C2_USB_WRITE_V8_MEM = 0x04,
+	B2C2_USB_READ_V8_MEM  = 0x05,
+	B2C2_USB_READ_REG     = 0x08,
+	B2C2_USB_WRITE_REG    = 0x0A,
+/*	B2C2_USB_WRITEREGLO   = 0x0A, */
+	B2C2_USB_WRITEREGHI   = 0x0B,
+	B2C2_USB_FLASH_BLOCK  = 0x10,
+	B2C2_USB_I2C_REQUEST  = 0x11,
+	B2C2_USB_UTILITY      = 0x12,
+} flexcop_usb_request_t;
+
+/* function definition for I2C_REQUEST */
+typedef enum {
+	USB_FUNC_I2C_WRITE       = 0x01,
+	USB_FUNC_I2C_MULTIWRITE  = 0x02,
+	USB_FUNC_I2C_READ        = 0x03,
+	USB_FUNC_I2C_REPEATWRITE = 0x04,
+	USB_FUNC_GET_DESCRIPTOR  = 0x05,
+	USB_FUNC_I2C_REPEATREAD  = 0x06,
+/* DKT 020208 - add this to support special case of DiSEqC */
+	USB_FUNC_I2C_CHECKWRITE  = 0x07,
+	USB_FUNC_I2C_CHECKRESULT = 0x08,
+} flexcop_usb_i2c_function_t;
+
+/*
+ * function definition for UTILITY request 0x12
+ * DKT 020304 - new utility function
+ */
+typedef enum {
+	UTILITY_SET_FILTER          = 0x01,
+	UTILITY_DATA_ENABLE         = 0x02,
+	UTILITY_FLEX_MULTIWRITE     = 0x03,
+	UTILITY_SET_BUFFER_SIZE     = 0x04,
+	UTILITY_FLEX_OPERATOR       = 0x05,
+	UTILITY_FLEX_RESET300_START = 0x06,
+	UTILITY_FLEX_RESET300_STOP  = 0x07,
+	UTILITY_FLEX_RESET300       = 0x08,
+	UTILITY_SET_ISO_SIZE        = 0x09,
+	UTILITY_DATA_RESET          = 0x0A,
+	UTILITY_GET_DATA_STATUS     = 0x10,
+	UTILITY_GET_V8_REG          = 0x11,
+/* DKT 020326 - add function for v1.14 */
+	UTILITY_SRAM_WRITE          = 0x12,
+	UTILITY_SRAM_READ           = 0x13,
+	UTILITY_SRAM_TESTFILL       = 0x14,
+	UTILITY_SRAM_TESTSET        = 0x15,
+	UTILITY_SRAM_TESTVERIFY     = 0x16,
+} flexcop_usb_utility_function_t;
+
+#define B2C2_WAIT_FOR_OPERATION_RW  1*HZ       /* 1 s */
+#define B2C2_WAIT_FOR_OPERATION_RDW 3*HZ       /* 3 s */
+#define B2C2_WAIT_FOR_OPERATION_WDW 1*HZ       /* 1 s */
+
+#define B2C2_WAIT_FOR_OPERATION_V8READ   3*HZ  /* 3 s */
+#define B2C2_WAIT_FOR_OPERATION_V8WRITE  3*HZ  /* 3 s */
+#define B2C2_WAIT_FOR_OPERATION_V8FLASH  3*HZ  /* 3 s */
+
+typedef enum {
+	V8_MEMORY_PAGE_DVB_CI = 0x20,
+	V8_MEMORY_PAGE_DVB_DS = 0x40,
+	V8_MEMORY_PAGE_MULTI2 = 0x60,
+	V8_MEMORY_PAGE_FLASH  = 0x80
+} flexcop_usb_mem_page_t;
+
+#define V8_MEMORY_EXTENDED      (1 << 15)
+
+#define USB_MEM_READ_MAX                32
+#define USB_MEM_WRITE_MAX               1
+#define USB_FLASH_MAX                   8
+
+#define V8_MEMORY_PAGE_SIZE     0x8000      // 32K
+#define V8_MEMORY_PAGE_MASK     0x7FFF
+
+#endif

drivers/media/dvb/b2c2/flexcop.c

+/*
+ * flexcop.c - driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * Copyright (C) 2004-5 Patrick Boettcher <patrick.boettcher@desy.de>
+ *
+ * based on the skystar2-driver
+ * Copyright (C) 2003 Vadim Catana, skystar@moldova.cc
+ *
+ * Acknowledgements:
+ *     John Jurrius from BBTI, Inc. for extensive support with
+ *         code examples and data books
+ *
+ *     Bjarne Steinsbo, bjarne at steinsbo.com (some ideas for rewriting)
+ *
+ * Contributions to the skystar2-driver have been done by
+ *     Vincenzo Di Massa, hawk.it at tiscalinet.it (several DiSEqC fixes)
+ *     Roberto Ragusa, r.ragusa at libero.it (polishing, restyling the code)
+ *     Niklas Peinecke, peinecke at gdv.uni-hannover.de (hardware pid/mac filtering)
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * 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 Lesser 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 "flexcop.h"
+
+#define DRIVER_NAME "B2C2 FlexcopII/II(b)/III digital TV receiver chip"
+#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de"
+
+#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
+#define DEBSTATUS ""
+#else
+#define DEBSTATUS " (debugging is not enabled)"
+#endif
+
+int b2c2_flexcop_debug;
+module_param_named(debug, b2c2_flexcop_debug,  int, 0644);
+MODULE_PARM_DESC(debug, "set debug level (1=info,2=tuner,4=i2c,8=ts,16=sram (|-able))." DEBSTATUS);
+#undef DEBSTATUS
+
+/* global zero for ibi values */
+flexcop_ibi_value ibi_zero;
+
+static int flexcop_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
+{
+	struct flexcop_device *fc = dvbdmxfeed->demux->priv;
+	return flexcop_pid_feed_control(fc,dvbdmxfeed,1);
+}
+
+static int flexcop_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
+{
+	struct flexcop_device *fc = dvbdmxfeed->demux->priv;
+	return flexcop_pid_feed_control(fc,dvbdmxfeed,0);
+}
+
+static int flexcop_dvb_init(struct flexcop_device *fc)
+{
+	int ret;
+	if ((ret = dvb_register_adapter(&fc->dvb_adapter,"FlexCop Digital TV device",THIS_MODULE)) < 0) {
+		err("error registering DVB adapter");
+		return ret;
+	}
+	fc->dvb_adapter.priv = fc;
+
+	fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING);
+	fc->demux.priv = fc;
+
+	fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
+
+	fc->demux.start_feed = flexcop_dvb_start_feed;
+	fc->demux.stop_feed = flexcop_dvb_stop_feed;
+	fc->demux.write_to_decoder = NULL;
+
+	if ((ret = dvb_dmx_init(&fc->demux)) < 0) {
+		err("dvb_dmx failed: error %d",ret);
+		goto err_dmx;
+	}
+
+	fc->hw_frontend.source = DMX_FRONTEND_0;
+
+	fc->dmxdev.filternum = fc->demux.feednum;
+	fc->dmxdev.demux = &fc->demux.dmx;
+	fc->dmxdev.capabilities = 0;
+	if ((ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter)) < 0) {
+		err("dvb_dmxdev_init failed: error %d",ret);
+		goto err_dmx_dev;
+	}
+
+	if ((ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend)) < 0) {
+		err("adding hw_frontend to dmx failed: error %d",ret);
+		goto err_dmx_add_hw_frontend;
+	}
+
+	fc->mem_frontend.source = DMX_MEMORY_FE;
+	if ((ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend)) < 0) {
+		err("adding mem_frontend to dmx failed: error %d",ret);
+		goto err_dmx_add_mem_frontend;
+	}
+
+	if ((ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend)) < 0) {
+		err("connect frontend failed: error %d",ret);
+		goto err_connect_frontend;
+	}
+
+	dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
+
+	fc->init_state |= FC_STATE_DVB_INIT;
+	goto success;
+
+err_connect_frontend:
+	fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->mem_frontend);
+err_dmx_add_mem_frontend:
+	fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->hw_frontend);
+err_dmx_add_hw_frontend:
+	dvb_dmxdev_release(&fc->dmxdev);
+err_dmx_dev:
+	dvb_dmx_release(&fc->demux);
+err_dmx:
+	dvb_unregister_adapter(&fc->dvb_adapter);
+	return ret;
+
+success:
+	return 0;
+}
+
+static void flexcop_dvb_exit(struct flexcop_device *fc)
+{
+	if (fc->init_state & FC_STATE_DVB_INIT) {
+		dvb_net_release(&fc->dvbnet);
+
+		fc->demux.dmx.close(&fc->demux.dmx);
+		fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->mem_frontend);
+		fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->hw_frontend);
+		dvb_dmxdev_release(&fc->dmxdev);
+		dvb_dmx_release(&fc->demux);
+		dvb_unregister_adapter(&fc->dvb_adapter);
+
+		deb_info("deinitialized dvb stuff\n");
+	}
+	fc->init_state &= ~FC_STATE_DVB_INIT;
+}
+
+/* these methods are necessary to achieve the long-term-goal of hiding the
+ * struct flexcop_device from the bus-parts */
+void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len)
+{
+	dvb_dmx_swfilter(&fc->demux, buf, len);
+}
+EXPORT_SYMBOL(flexcop_pass_dmx_data);
+
+void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no)
+{
+	dvb_dmx_swfilter_packets(&fc->demux, buf, no);
+}
+EXPORT_SYMBOL(flexcop_pass_dmx_packets);
+
+static void flexcop_reset(struct flexcop_device *fc)
+{
+	flexcop_ibi_value v210,v204;
+
+/* reset the flexcop itself */
+	fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
+
+	v210.raw = 0;
+	v210.sw_reset_210.reset_blocks = 0xff;
+	v210.sw_reset_210.Block_reset_enable = 0xb2;
+	fc->write_ibi_reg(fc,sw_reset_210,v210);
+
+/* reset the periphical devices */
+
+	v204 = fc->read_ibi_reg(fc,misc_204);
+	v204.misc_204.Per_reset_sig = 0;
+	fc->write_ibi_reg(fc,misc_204,v204);
+	v204.misc_204.Per_reset_sig = 1;
+	fc->write_ibi_reg(fc,misc_204,v204);
+
+/*	v208.raw = 0;
+	v208.ctrl_208.Null_filter_sig = 1;
+	fc->write_ibi_reg(fc,ctrl_208,v208);*/
+}
+
+struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len)
+{
+	void *bus;
+	struct flexcop_device *fc = kmalloc(sizeof(struct flexcop_device), GFP_KERNEL);
+	if (!fc) {
+		err("no memory");
+		return NULL;
+	}
+	memset(fc, 0, sizeof(struct flexcop_device));
+
+	bus = kmalloc(bus_specific_len, GFP_KERNEL);
+	if (!bus) {
+		err("no memory");
+		kfree(fc);
+		return NULL;
+	}
+	memset(bus, 0, bus_specific_len);
+
+	fc->bus_specific = bus;
+
+	return fc;
+}
+EXPORT_SYMBOL(flexcop_device_kmalloc);
+
+void flexcop_device_kfree(struct flexcop_device *fc)
+{
+	kfree(fc->bus_specific);
+	kfree(fc);
+}
+EXPORT_SYMBOL(flexcop_device_kfree);
+
+int flexcop_device_initialize(struct flexcop_device *fc)
+{
+	int ret;
+	ibi_zero.raw = 0;
+
+	flexcop_reset(fc);
+	flexcop_determine_revision(fc);
+	flexcop_sram_init(fc);
+	flexcop_hw_filter_init(fc);
+
+	flexcop_smc_ctrl(fc, 0);
+
+	if (fc->get_mac_addr(fc, 0) == 0) {
+		u8 *b = fc->mac_address;
+		info("MAC address = %02x:%02x:%02x:%02x:%02x:%02x", b[0],b[1],b[2],b[3],b[4],b[5]);
+		flexcop_set_mac_filter(fc,fc->mac_address);
+		flexcop_mac_filter_ctrl(fc,1);
+	} else
+		warn("reading of MAC address failed.\n");
+
+	if ((ret = flexcop_dvb_init(fc)))
+		goto error;
+
+	if ((ret = flexcop_i2c_init(fc)))
+		goto error;
+
+	if ((ret = flexcop_frontend_init(fc)))
+		goto error;
+
+	flexcop_device_name(fc,"initialization of","complete");
+
+	ret = 0;
+	goto success;
+error:
+	flexcop_device_exit(fc);
+success:
+	return ret;
+}
+EXPORT_SYMBOL(flexcop_device_initialize);
+
+void flexcop_device_exit(struct flexcop_device *fc)
+{
+	flexcop_frontend_exit(fc);
+	flexcop_i2c_exit(fc);
+	flexcop_dvb_exit(fc);
+}
+EXPORT_SYMBOL(flexcop_device_exit);
+
+static int flexcop_module_init(void)
+{
+	info(DRIVER_NAME " loaded successfully");
+	return 0;
+}
+
+static void flexcop_module_cleanup(void)
+{
+	info(DRIVER_NAME " unloaded successfully");
+}
+
+module_init(flexcop_module_init);
+module_exit(flexcop_module_cleanup);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_NAME);
+MODULE_LICENSE("GPL");

drivers/media/dvb/b2c2/flexcop.h

+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop.h - private header file for all flexcop-chip-source files.
+ *
+ * see flexcop.c for copyright information.
+ */
+#ifndef __FLEXCOP_H__
+#define __FLEXCOP_H___
+
+#define FC_LOG_PREFIX "b2c2-flexcop"
+#include "flexcop-common.h"
+
+extern int b2c2_flexcop_debug;
+
+/* debug */
+#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
+#define dprintk(level,args...) \
+	do { if ((b2c2_flexcop_debug & level)) printk(args); } while (0)
+#else
+#define dprintk(level,args...)
+#endif
+
+#define deb_info(args...)  dprintk(0x01,args)
+#define deb_tuner(args...) dprintk(0x02,args)
+#define deb_i2c(args...)   dprintk(0x04,args)
+#define deb_ts(args...)    dprintk(0x08,args)
+#define deb_sram(args...)  dprintk(0x10,args)
+
+#endif