3 Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
4 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 This file includes an i2c implementation that was reverse engineered
23 from the Hauppauge windows driver. Older ivtv versions used i2c-algo-bit,
24 which whilst fine under most circumstances, had trouble with the Zilog
25 CPU on the PVR-150 which handles IR functions (occasional inability to
26 communicate with the chip until it was reset) and also with the i2c
27 bus being completely unreachable when multiple PVR cards were present.
29 The implementation is very similar to i2c-algo-bit, but there are enough
30 subtle differences that the two are hard to merge. The general strategy
31 employed by i2c-algo-bit is to use udelay() to implement the timing
32 when putting out bits on the scl/sda lines. The general strategy taken
33 here is to poll the lines for state changes (see ivtv_waitscl and
34 ivtv_waitsda). In addition there are small delays at various locations
35 which poll the SCL line 5 times (ivtv_scldelay). I would guess that
36 since this is memory mapped I/O that the length of those delays is tied
37 to the PCI bus clock. There is some extra code to do with recovery
38 and retries. Since it is not known what causes the actual i2c problems
39 in the first place, the only goal if one was to attempt to use
40 i2c-algo-bit would be to try to make it follow the same code path.
41 This would be a lot of work, and I'm also not convinced that it would
42 provide a generic benefit to i2c-algo-bit. Therefore consider this
43 an engineering solution -- not pretty, but it works.
45 Some more general comments about what we are doing:
47 The i2c bus is a 2 wire serial bus, with clock (SCL) and data (SDA)
48 lines. To communicate on the bus (as a master, we don't act as a slave),
49 we first initiate a start condition (ivtv_start). We then write the
50 address of the device that we want to communicate with, along with a flag
51 that indicates whether this is a read or a write. The slave then issues
52 an ACK signal (ivtv_ack), which tells us that it is ready for reading /
53 writing. We then proceed with reading or writing (ivtv_read/ivtv_write),
54 and finally issue a stop condition (ivtv_stop) to make the bus available
57 There is an additional form of transaction where a write may be
58 immediately followed by a read. In this case, there is no intervening
59 stop condition. (Only the msp3400 chip uses this method of data transfer).
62 #include "ivtv-driver.h"
63 #include "ivtv-cards.h"
64 #include "ivtv-gpio.h"
67 #include <media/ir-kbd-i2c.h>
69 /* i2c implementation for cx23415/6 chip, ivtv project.
70 * Author: Kevin Thayer (nufan_wfk at yahoo.com)
73 #define IVTV_REG_I2C_SETSCL_OFFSET 0x7000
74 #define IVTV_REG_I2C_SETSDA_OFFSET 0x7004
75 #define IVTV_REG_I2C_GETSCL_OFFSET 0x7008
76 #define IVTV_REG_I2C_GETSDA_OFFSET 0x700c
78 #ifndef I2C_ADAP_CLASS_TV_ANALOG
79 #define I2C_ADAP_CLASS_TV_ANALOG I2C_CLASS_TV_ANALOG
80 #endif /* I2C_ADAP_CLASS_TV_ANALOG */
82 #define IVTV_CS53L32A_I2C_ADDR 0x11
83 #define IVTV_M52790_I2C_ADDR 0x48
84 #define IVTV_CX25840_I2C_ADDR 0x44
85 #define IVTV_SAA7115_I2C_ADDR 0x21
86 #define IVTV_SAA7127_I2C_ADDR 0x44
87 #define IVTV_SAA717x_I2C_ADDR 0x21
88 #define IVTV_MSP3400_I2C_ADDR 0x40
89 #define IVTV_HAUPPAUGE_I2C_ADDR 0x50
90 #define IVTV_WM8739_I2C_ADDR 0x1a
91 #define IVTV_WM8775_I2C_ADDR 0x1b
92 #define IVTV_TEA5767_I2C_ADDR 0x60
93 #define IVTV_UPD64031A_I2C_ADDR 0x12
94 #define IVTV_UPD64083_I2C_ADDR 0x5c
95 #define IVTV_VP27SMPX_I2C_ADDR 0x5b
96 #define IVTV_M52790_I2C_ADDR 0x48
98 /* This array should match the IVTV_HW_ defines */
99 static const u8 hw_driverids[] = {
100 I2C_DRIVERID_CX25840,
101 I2C_DRIVERID_SAA711X,
102 I2C_DRIVERID_SAA7127,
103 I2C_DRIVERID_MSP3400,
106 I2C_DRIVERID_CS53L32A,
107 I2C_DRIVERID_TVEEPROM,
108 I2C_DRIVERID_SAA711X,
109 I2C_DRIVERID_UPD64031A,
110 I2C_DRIVERID_UPD64083,
111 I2C_DRIVERID_SAA717X,
113 I2C_DRIVERID_VP27SMPX,
115 0 /* IVTV_HW_GPIO dummy driver ID */
118 /* This array should match the IVTV_HW_ defines */
119 static const u8 hw_addrs[] = {
120 IVTV_CX25840_I2C_ADDR,
121 IVTV_SAA7115_I2C_ADDR,
122 IVTV_SAA7127_I2C_ADDR,
123 IVTV_MSP3400_I2C_ADDR,
125 IVTV_WM8775_I2C_ADDR,
126 IVTV_CS53L32A_I2C_ADDR,
128 IVTV_SAA7115_I2C_ADDR,
129 IVTV_UPD64031A_I2C_ADDR,
130 IVTV_UPD64083_I2C_ADDR,
131 IVTV_SAA717x_I2C_ADDR,
132 IVTV_WM8739_I2C_ADDR,
133 IVTV_VP27SMPX_I2C_ADDR,
134 IVTV_M52790_I2C_ADDR,
135 0 /* IVTV_HW_GPIO dummy driver ID */
138 /* This array should match the IVTV_HW_ defines */
139 static const char * const hw_drivernames[] = {
158 int ivtv_i2c_register(struct ivtv *itv, unsigned idx)
160 struct i2c_board_info info;
161 struct i2c_client *c;
165 IVTV_DEBUG_I2C("i2c client register\n");
166 if (idx >= ARRAY_SIZE(hw_driverids) || hw_driverids[idx] == 0)
168 id = hw_driverids[idx];
169 memset(&info, 0, sizeof(info));
170 strcpy(info.driver_name, hw_drivernames[idx]);
171 info.addr = hw_addrs[idx];
172 for (i = 0; itv->i2c_clients[i] && i < I2C_CLIENTS_MAX; i++) {}
174 if (i == I2C_CLIENTS_MAX) {
175 IVTV_ERR("insufficient room for new I2C client!\n");
179 if (id != I2C_DRIVERID_TUNER) {
180 if (id == I2C_DRIVERID_UPD64031A ||
181 id == I2C_DRIVERID_UPD64083) {
182 unsigned short addrs[2] = { info.addr, I2C_CLIENT_END };
184 c = i2c_new_probed_device(&itv->i2c_adap, &info, addrs);
186 c = i2c_new_device(&itv->i2c_adap, &info);
187 if (c && c->driver == NULL)
188 i2c_unregister_device(c);
190 itv->i2c_clients[i] = c;
191 return itv->i2c_clients[i] ? 0 : -ENODEV;
194 /* special tuner handling */
195 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->radio);
196 if (c && c->driver == NULL)
197 i2c_unregister_device(c);
199 itv->i2c_clients[i++] = c;
200 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->demod);
201 if (c && c->driver == NULL)
202 i2c_unregister_device(c);
204 itv->i2c_clients[i++] = c;
205 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->tv);
206 if (c && c->driver == NULL)
207 i2c_unregister_device(c);
209 itv->i2c_clients[i++] = c;
213 static int attach_inform(struct i2c_client *client)
218 static int detach_inform(struct i2c_client *client)
221 struct ivtv *itv = (struct ivtv *)i2c_get_adapdata(client->adapter);
223 IVTV_DEBUG_I2C("i2c client detach\n");
224 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
225 if (itv->i2c_clients[i] == client) {
226 itv->i2c_clients[i] = NULL;
230 IVTV_DEBUG_I2C("i2c detach [client=%s,%s]\n",
231 client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
236 /* Set the serial clock line to the desired state */
237 static void ivtv_setscl(struct ivtv *itv, int state)
240 /* write bits are inverted */
241 write_reg(~state, IVTV_REG_I2C_SETSCL_OFFSET);
244 /* Set the serial data line to the desired state */
245 static void ivtv_setsda(struct ivtv *itv, int state)
248 /* write bits are inverted */
249 write_reg(~state & 1, IVTV_REG_I2C_SETSDA_OFFSET);
252 /* Read the serial clock line */
253 static int ivtv_getscl(struct ivtv *itv)
255 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
258 /* Read the serial data line */
259 static int ivtv_getsda(struct ivtv *itv)
261 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
264 /* Implement a short delay by polling the serial clock line */
265 static void ivtv_scldelay(struct ivtv *itv)
269 for (i = 0; i < 5; ++i)
273 /* Wait for the serial clock line to become set to a specific value */
274 static int ivtv_waitscl(struct ivtv *itv, int val)
279 for (i = 0; i < 1000; ++i) {
280 if (ivtv_getscl(itv) == val)
286 /* Wait for the serial data line to become set to a specific value */
287 static int ivtv_waitsda(struct ivtv *itv, int val)
292 for (i = 0; i < 1000; ++i) {
293 if (ivtv_getsda(itv) == val)
299 /* Wait for the slave to issue an ACK */
300 static int ivtv_ack(struct ivtv *itv)
304 if (ivtv_getscl(itv) == 1) {
305 IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n");
307 if (!ivtv_waitscl(itv, 0)) {
308 IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n");
315 if (!ivtv_waitsda(itv, 0)) {
316 IVTV_DEBUG_I2C("Slave did not ack\n");
320 if (!ivtv_waitscl(itv, 0)) {
321 IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n");
327 /* Write a single byte to the i2c bus and wait for the slave to ACK */
328 static int ivtv_sendbyte(struct ivtv *itv, unsigned char byte)
332 IVTV_DEBUG_HI_I2C("write %x\n",byte);
333 for (i = 0; i < 8; ++i, byte<<=1) {
335 if (!ivtv_waitscl(itv, 0)) {
336 IVTV_DEBUG_I2C("Error setting SCL low\n");
340 ivtv_setsda(itv, bit);
341 if (!ivtv_waitsda(itv, bit)) {
342 IVTV_DEBUG_I2C("Error setting SDA\n");
346 if (!ivtv_waitscl(itv, 1)) {
347 IVTV_DEBUG_I2C("Slave not ready for bit\n");
352 if (!ivtv_waitscl(itv, 0)) {
353 IVTV_DEBUG_I2C("Error setting SCL low\n");
356 return ivtv_ack(itv);
359 /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the
361 static int ivtv_readbyte(struct ivtv *itv, unsigned char *byte, int nack)
369 for (i = 0; i < 8; ++i) {
373 if (!ivtv_waitscl(itv, 1)) {
374 IVTV_DEBUG_I2C("Error setting SCL high\n");
377 *byte = ((*byte)<<1)|ivtv_getsda(itv);
381 ivtv_setsda(itv, nack);
387 IVTV_DEBUG_HI_I2C("read %x\n",*byte);
391 /* Issue a start condition on the i2c bus to alert slaves to prepare for
393 static int ivtv_start(struct ivtv *itv)
397 sda = ivtv_getsda(itv);
399 IVTV_DEBUG_HI_I2C("SDA was low at start\n");
401 if (!ivtv_waitsda(itv, 1)) {
402 IVTV_DEBUG_I2C("SDA stuck low\n");
406 if (ivtv_getscl(itv) != 1) {
408 if (!ivtv_waitscl(itv, 1)) {
409 IVTV_DEBUG_I2C("SCL stuck low at start\n");
418 /* Issue a stop condition on the i2c bus to release it */
419 static int ivtv_stop(struct ivtv *itv)
423 if (ivtv_getscl(itv) != 0) {
424 IVTV_DEBUG_HI_I2C("SCL not low when stopping\n");
426 if (!ivtv_waitscl(itv, 0)) {
427 IVTV_DEBUG_I2C("SCL could not be set low\n");
433 if (!ivtv_waitscl(itv, 1)) {
434 IVTV_DEBUG_I2C("SCL could not be set high\n");
439 if (!ivtv_waitsda(itv, 1)) {
440 IVTV_DEBUG_I2C("resetting I2C\n");
441 for (i = 0; i < 16; ++i) {
448 ivtv_waitsda(itv, 1);
454 /* Write a message to the given i2c slave. do_stop may be 0 to prevent
455 issuing the i2c stop condition (when following with a read) */
456 static int ivtv_write(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len, int do_stop)
458 int retry, ret = -EREMOTEIO;
461 for (retry = 0; ret != 0 && retry < 8; ++retry) {
462 ret = ivtv_start(itv);
465 ret = ivtv_sendbyte(itv, addr<<1);
466 for (i = 0; ret == 0 && i < len; ++i)
467 ret = ivtv_sendbyte(itv, data[i]);
469 if (ret != 0 || do_stop) {
474 IVTV_DEBUG_I2C("i2c write to %x failed\n", addr);
478 /* Read data from the given i2c slave. A stop condition is always issued. */
479 static int ivtv_read(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len)
481 int retry, ret = -EREMOTEIO;
484 for (retry = 0; ret != 0 && retry < 8; ++retry) {
485 ret = ivtv_start(itv);
487 ret = ivtv_sendbyte(itv, (addr << 1) | 1);
488 for (i = 0; ret == 0 && i < len; ++i) {
489 ret = ivtv_readbyte(itv, &data[i], i == len - 1);
494 IVTV_DEBUG_I2C("i2c read from %x failed\n", addr);
498 /* Kernel i2c transfer implementation. Takes a number of messages to be read
499 or written. If a read follows a write, this will occur without an
500 intervening stop condition */
501 static int ivtv_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
503 struct ivtv *itv = i2c_get_adapdata(i2c_adap);
507 mutex_lock(&itv->i2c_bus_lock);
508 for (i = retval = 0; retval == 0 && i < num; i++) {
509 if (msgs[i].flags & I2C_M_RD)
510 retval = ivtv_read(itv, msgs[i].addr, msgs[i].buf, msgs[i].len);
512 /* if followed by a read, don't stop */
513 int stop = !(i + 1 < num && msgs[i + 1].flags == I2C_M_RD);
515 retval = ivtv_write(itv, msgs[i].addr, msgs[i].buf, msgs[i].len, stop);
518 mutex_unlock(&itv->i2c_bus_lock);
519 return retval ? retval : num;
522 /* Kernel i2c capabilities */
523 static u32 ivtv_functionality(struct i2c_adapter *adap)
525 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
528 static struct i2c_algorithm ivtv_algo = {
529 .master_xfer = ivtv_xfer,
530 .functionality = ivtv_functionality,
533 /* template for our-bit banger */
534 static struct i2c_adapter ivtv_i2c_adap_hw_template = {
535 .name = "ivtv i2c driver",
536 .id = I2C_HW_B_CX2341X,
538 .algo_data = NULL, /* filled from template */
539 .client_register = attach_inform,
540 .client_unregister = detach_inform,
541 .owner = THIS_MODULE,
544 static void ivtv_setscl_old(void *data, int state)
546 struct ivtv *itv = (struct ivtv *)data;
549 itv->i2c_state |= 0x01;
551 itv->i2c_state &= ~0x01;
554 /* write bits are inverted */
555 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET);
558 static void ivtv_setsda_old(void *data, int state)
560 struct ivtv *itv = (struct ivtv *)data;
563 itv->i2c_state |= 0x01;
565 itv->i2c_state &= ~0x01;
568 /* write bits are inverted */
569 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET);
572 static int ivtv_getscl_old(void *data)
574 struct ivtv *itv = (struct ivtv *)data;
576 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
579 static int ivtv_getsda_old(void *data)
581 struct ivtv *itv = (struct ivtv *)data;
583 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
586 /* template for i2c-bit-algo */
587 static struct i2c_adapter ivtv_i2c_adap_template = {
588 .name = "ivtv i2c driver",
589 .id = I2C_HW_B_CX2341X,
590 .algo = NULL, /* set by i2c-algo-bit */
591 .algo_data = NULL, /* filled from template */
592 .client_register = attach_inform,
593 .client_unregister = detach_inform,
594 .owner = THIS_MODULE,
597 static const struct i2c_algo_bit_data ivtv_i2c_algo_template = {
598 .setsda = ivtv_setsda_old,
599 .setscl = ivtv_setscl_old,
600 .getsda = ivtv_getsda_old,
601 .getscl = ivtv_getscl_old,
606 static struct i2c_client ivtv_i2c_client_template = {
607 .name = "ivtv internal",
610 int ivtv_call_i2c_client(struct ivtv *itv, int addr, unsigned int cmd, void *arg)
612 struct i2c_client *client;
616 IVTV_DEBUG_I2C("call_i2c_client addr=%02x\n", addr);
617 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
618 client = itv->i2c_clients[i];
619 if (client == NULL || client->driver == NULL ||
620 client->driver->command == NULL)
622 if (addr == client->addr) {
623 retval = client->driver->command(client, cmd, arg);
627 if (cmd != VIDIOC_G_CHIP_IDENT)
628 IVTV_ERR("i2c addr 0x%02x not found for command 0x%x\n", addr, cmd);
632 /* Find the i2c device based on the driver ID and return
633 its i2c address or -ENODEV if no matching device was found. */
634 static int ivtv_i2c_id_addr(struct ivtv *itv, u32 id)
636 struct i2c_client *client;
637 int retval = -ENODEV;
640 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
641 client = itv->i2c_clients[i];
642 if (client == NULL || client->driver == NULL)
644 if (id == client->driver->id) {
645 retval = client->addr;
652 /* Find the i2c device name matching the DRIVERID */
653 static const char *ivtv_i2c_id_name(u32 id)
657 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
658 if (hw_driverids[i] == id)
659 return hw_drivernames[i];
660 return "unknown device";
663 /* Find the i2c device name matching the IVTV_HW_ flag */
664 static const char *ivtv_i2c_hw_name(u32 hw)
668 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
670 return hw_drivernames[i];
671 return "unknown device";
674 /* Find the i2c device matching the IVTV_HW_ flag and return
675 its i2c address or -ENODEV if no matching device was found. */
676 int ivtv_i2c_hw_addr(struct ivtv *itv, u32 hw)
680 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
682 return ivtv_i2c_id_addr(itv, hw_driverids[i]);
686 /* Calls i2c device based on IVTV_HW_ flag. If hw == 0, then do nothing.
687 If hw == IVTV_HW_GPIO then call the gpio handler. */
688 int ivtv_i2c_hw(struct ivtv *itv, u32 hw, unsigned int cmd, void *arg)
692 if (hw == IVTV_HW_GPIO)
693 return ivtv_gpio(itv, cmd, arg);
697 addr = ivtv_i2c_hw_addr(itv, hw);
699 IVTV_ERR("i2c hardware 0x%08x (%s) not found for command 0x%x\n",
700 hw, ivtv_i2c_hw_name(hw), cmd);
703 return ivtv_call_i2c_client(itv, addr, cmd, arg);
706 /* Calls i2c device based on I2C driver ID. */
707 int ivtv_i2c_id(struct ivtv *itv, u32 id, unsigned int cmd, void *arg)
711 addr = ivtv_i2c_id_addr(itv, id);
713 if (cmd != VIDIOC_G_CHIP_IDENT)
714 IVTV_ERR("i2c ID 0x%08x (%s) not found for command 0x%x\n",
715 id, ivtv_i2c_id_name(id), cmd);
718 return ivtv_call_i2c_client(itv, addr, cmd, arg);
721 int ivtv_cx25840(struct ivtv *itv, unsigned int cmd, void *arg)
723 return ivtv_call_i2c_client(itv, IVTV_CX25840_I2C_ADDR, cmd, arg);
726 int ivtv_saa7115(struct ivtv *itv, unsigned int cmd, void *arg)
728 return ivtv_call_i2c_client(itv, IVTV_SAA7115_I2C_ADDR, cmd, arg);
731 int ivtv_saa7127(struct ivtv *itv, unsigned int cmd, void *arg)
733 return ivtv_call_i2c_client(itv, IVTV_SAA7127_I2C_ADDR, cmd, arg);
736 int ivtv_saa717x(struct ivtv *itv, unsigned int cmd, void *arg)
738 return ivtv_call_i2c_client(itv, IVTV_SAA717x_I2C_ADDR, cmd, arg);
741 int ivtv_upd64031a(struct ivtv *itv, unsigned int cmd, void *arg)
743 return ivtv_call_i2c_client(itv, IVTV_UPD64031A_I2C_ADDR, cmd, arg);
746 int ivtv_upd64083(struct ivtv *itv, unsigned int cmd, void *arg)
748 return ivtv_call_i2c_client(itv, IVTV_UPD64083_I2C_ADDR, cmd, arg);
751 /* broadcast cmd for all I2C clients and for the gpio subsystem */
752 void ivtv_call_i2c_clients(struct ivtv *itv, unsigned int cmd, void *arg)
754 if (itv->i2c_adap.algo == NULL) {
755 IVTV_ERR("Adapter is not set");
758 i2c_clients_command(&itv->i2c_adap, cmd, arg);
759 if (itv->hw_flags & IVTV_HW_GPIO)
760 ivtv_gpio(itv, cmd, arg);
763 /* init + register i2c algo-bit adapter */
764 int init_ivtv_i2c(struct ivtv *itv)
766 IVTV_DEBUG_I2C("i2c init\n");
768 /* Sanity checks for the I2C hardware arrays. They must be the
769 * same size and GPIO must be the last entry.
771 if (ARRAY_SIZE(hw_driverids) != ARRAY_SIZE(hw_addrs) ||
772 ARRAY_SIZE(hw_drivernames) != ARRAY_SIZE(hw_addrs) ||
773 IVTV_HW_GPIO != (1 << (ARRAY_SIZE(hw_addrs) - 1)) ||
774 hw_driverids[ARRAY_SIZE(hw_addrs) - 1]) {
775 IVTV_ERR("Mismatched I2C hardware arrays\n");
778 if (itv->options.newi2c > 0) {
779 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_hw_template,
780 sizeof(struct i2c_adapter));
782 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_template,
783 sizeof(struct i2c_adapter));
784 memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template,
785 sizeof(struct i2c_algo_bit_data));
787 itv->i2c_algo.data = itv;
788 itv->i2c_adap.algo_data = &itv->i2c_algo;
790 sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d",
792 i2c_set_adapdata(&itv->i2c_adap, itv);
794 memcpy(&itv->i2c_client, &ivtv_i2c_client_template,
795 sizeof(struct i2c_client));
796 itv->i2c_client.adapter = &itv->i2c_adap;
797 itv->i2c_adap.dev.parent = &itv->dev->dev;
799 IVTV_DEBUG_I2C("setting scl and sda to 1\n");
803 if (itv->options.newi2c > 0)
804 return i2c_add_adapter(&itv->i2c_adap);
806 return i2c_bit_add_bus(&itv->i2c_adap);
809 void exit_ivtv_i2c(struct ivtv *itv)
811 IVTV_DEBUG_I2C("i2c exit\n");
813 i2c_del_adapter(&itv->i2c_adap);