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 #define IVTV_CS53L32A_I2C_ADDR 0x11
79 #define IVTV_M52790_I2C_ADDR 0x48
80 #define IVTV_CX25840_I2C_ADDR 0x44
81 #define IVTV_SAA7115_I2C_ADDR 0x21
82 #define IVTV_SAA7127_I2C_ADDR 0x44
83 #define IVTV_SAA717x_I2C_ADDR 0x21
84 #define IVTV_MSP3400_I2C_ADDR 0x40
85 #define IVTV_HAUPPAUGE_I2C_ADDR 0x50
86 #define IVTV_WM8739_I2C_ADDR 0x1a
87 #define IVTV_WM8775_I2C_ADDR 0x1b
88 #define IVTV_TEA5767_I2C_ADDR 0x60
89 #define IVTV_UPD64031A_I2C_ADDR 0x12
90 #define IVTV_UPD64083_I2C_ADDR 0x5c
91 #define IVTV_VP27SMPX_I2C_ADDR 0x5b
92 #define IVTV_M52790_I2C_ADDR 0x48
94 /* This array should match the IVTV_HW_ defines */
95 static const u8 hw_driverids[] = {
102 I2C_DRIVERID_CS53L32A,
103 I2C_DRIVERID_TVEEPROM,
104 I2C_DRIVERID_SAA711X,
105 I2C_DRIVERID_UPD64031A,
106 I2C_DRIVERID_UPD64083,
107 I2C_DRIVERID_SAA717X,
109 I2C_DRIVERID_VP27SMPX,
111 0 /* IVTV_HW_GPIO dummy driver ID */
114 /* This array should match the IVTV_HW_ defines */
115 static const u8 hw_addrs[] = {
116 IVTV_CX25840_I2C_ADDR,
117 IVTV_SAA7115_I2C_ADDR,
118 IVTV_SAA7127_I2C_ADDR,
119 IVTV_MSP3400_I2C_ADDR,
121 IVTV_WM8775_I2C_ADDR,
122 IVTV_CS53L32A_I2C_ADDR,
124 IVTV_SAA7115_I2C_ADDR,
125 IVTV_UPD64031A_I2C_ADDR,
126 IVTV_UPD64083_I2C_ADDR,
127 IVTV_SAA717x_I2C_ADDR,
128 IVTV_WM8739_I2C_ADDR,
129 IVTV_VP27SMPX_I2C_ADDR,
130 IVTV_M52790_I2C_ADDR,
131 0 /* IVTV_HW_GPIO dummy driver ID */
134 /* This array should match the IVTV_HW_ defines */
135 static const char * const hw_devicenames[] = {
138 "saa7127_auto", /* saa7127 or saa7129 */
154 int ivtv_i2c_register(struct ivtv *itv, unsigned idx)
156 struct i2c_board_info info;
157 struct i2c_client *c;
161 IVTV_DEBUG_I2C("i2c client register\n");
162 if (idx >= ARRAY_SIZE(hw_driverids) || hw_driverids[idx] == 0)
164 id = hw_driverids[idx];
165 memset(&info, 0, sizeof(info));
166 strlcpy(info.type, hw_devicenames[idx], sizeof(info.type));
167 info.addr = hw_addrs[idx];
168 for (i = 0; itv->i2c_clients[i] && i < I2C_CLIENTS_MAX; i++) {}
170 if (i == I2C_CLIENTS_MAX) {
171 IVTV_ERR("insufficient room for new I2C client!\n");
175 if (id != I2C_DRIVERID_TUNER) {
176 if (id == I2C_DRIVERID_UPD64031A ||
177 id == I2C_DRIVERID_UPD64083) {
178 unsigned short addrs[2] = { info.addr, I2C_CLIENT_END };
180 c = i2c_new_probed_device(&itv->i2c_adap, &info, addrs);
182 c = i2c_new_device(&itv->i2c_adap, &info);
183 if (c && c->driver == NULL)
184 i2c_unregister_device(c);
186 itv->i2c_clients[i] = c;
187 return itv->i2c_clients[i] ? 0 : -ENODEV;
190 /* special tuner handling */
191 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->radio);
192 if (c && c->driver == NULL)
193 i2c_unregister_device(c);
195 itv->i2c_clients[i++] = c;
196 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->demod);
197 if (c && c->driver == NULL)
198 i2c_unregister_device(c);
200 itv->i2c_clients[i++] = c;
201 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->tv);
202 if (c && c->driver == NULL)
203 i2c_unregister_device(c);
205 itv->i2c_clients[i++] = c;
209 static int attach_inform(struct i2c_client *client)
214 static int detach_inform(struct i2c_client *client)
217 struct ivtv *itv = (struct ivtv *)i2c_get_adapdata(client->adapter);
219 IVTV_DEBUG_I2C("i2c client detach\n");
220 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
221 if (itv->i2c_clients[i] == client) {
222 itv->i2c_clients[i] = NULL;
226 IVTV_DEBUG_I2C("i2c detach [client=%s,%s]\n",
227 client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
232 /* Set the serial clock line to the desired state */
233 static void ivtv_setscl(struct ivtv *itv, int state)
236 /* write bits are inverted */
237 write_reg(~state, IVTV_REG_I2C_SETSCL_OFFSET);
240 /* Set the serial data line to the desired state */
241 static void ivtv_setsda(struct ivtv *itv, int state)
244 /* write bits are inverted */
245 write_reg(~state & 1, IVTV_REG_I2C_SETSDA_OFFSET);
248 /* Read the serial clock line */
249 static int ivtv_getscl(struct ivtv *itv)
251 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
254 /* Read the serial data line */
255 static int ivtv_getsda(struct ivtv *itv)
257 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
260 /* Implement a short delay by polling the serial clock line */
261 static void ivtv_scldelay(struct ivtv *itv)
265 for (i = 0; i < 5; ++i)
269 /* Wait for the serial clock line to become set to a specific value */
270 static int ivtv_waitscl(struct ivtv *itv, int val)
275 for (i = 0; i < 1000; ++i) {
276 if (ivtv_getscl(itv) == val)
282 /* Wait for the serial data line to become set to a specific value */
283 static int ivtv_waitsda(struct ivtv *itv, int val)
288 for (i = 0; i < 1000; ++i) {
289 if (ivtv_getsda(itv) == val)
295 /* Wait for the slave to issue an ACK */
296 static int ivtv_ack(struct ivtv *itv)
300 if (ivtv_getscl(itv) == 1) {
301 IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n");
303 if (!ivtv_waitscl(itv, 0)) {
304 IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n");
311 if (!ivtv_waitsda(itv, 0)) {
312 IVTV_DEBUG_I2C("Slave did not ack\n");
316 if (!ivtv_waitscl(itv, 0)) {
317 IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n");
323 /* Write a single byte to the i2c bus and wait for the slave to ACK */
324 static int ivtv_sendbyte(struct ivtv *itv, unsigned char byte)
328 IVTV_DEBUG_HI_I2C("write %x\n",byte);
329 for (i = 0; i < 8; ++i, byte<<=1) {
331 if (!ivtv_waitscl(itv, 0)) {
332 IVTV_DEBUG_I2C("Error setting SCL low\n");
336 ivtv_setsda(itv, bit);
337 if (!ivtv_waitsda(itv, bit)) {
338 IVTV_DEBUG_I2C("Error setting SDA\n");
342 if (!ivtv_waitscl(itv, 1)) {
343 IVTV_DEBUG_I2C("Slave not ready for bit\n");
348 if (!ivtv_waitscl(itv, 0)) {
349 IVTV_DEBUG_I2C("Error setting SCL low\n");
352 return ivtv_ack(itv);
355 /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the
357 static int ivtv_readbyte(struct ivtv *itv, unsigned char *byte, int nack)
365 for (i = 0; i < 8; ++i) {
369 if (!ivtv_waitscl(itv, 1)) {
370 IVTV_DEBUG_I2C("Error setting SCL high\n");
373 *byte = ((*byte)<<1)|ivtv_getsda(itv);
377 ivtv_setsda(itv, nack);
383 IVTV_DEBUG_HI_I2C("read %x\n",*byte);
387 /* Issue a start condition on the i2c bus to alert slaves to prepare for
389 static int ivtv_start(struct ivtv *itv)
393 sda = ivtv_getsda(itv);
395 IVTV_DEBUG_HI_I2C("SDA was low at start\n");
397 if (!ivtv_waitsda(itv, 1)) {
398 IVTV_DEBUG_I2C("SDA stuck low\n");
402 if (ivtv_getscl(itv) != 1) {
404 if (!ivtv_waitscl(itv, 1)) {
405 IVTV_DEBUG_I2C("SCL stuck low at start\n");
414 /* Issue a stop condition on the i2c bus to release it */
415 static int ivtv_stop(struct ivtv *itv)
419 if (ivtv_getscl(itv) != 0) {
420 IVTV_DEBUG_HI_I2C("SCL not low when stopping\n");
422 if (!ivtv_waitscl(itv, 0)) {
423 IVTV_DEBUG_I2C("SCL could not be set low\n");
429 if (!ivtv_waitscl(itv, 1)) {
430 IVTV_DEBUG_I2C("SCL could not be set high\n");
435 if (!ivtv_waitsda(itv, 1)) {
436 IVTV_DEBUG_I2C("resetting I2C\n");
437 for (i = 0; i < 16; ++i) {
444 ivtv_waitsda(itv, 1);
450 /* Write a message to the given i2c slave. do_stop may be 0 to prevent
451 issuing the i2c stop condition (when following with a read) */
452 static int ivtv_write(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len, int do_stop)
454 int retry, ret = -EREMOTEIO;
457 for (retry = 0; ret != 0 && retry < 8; ++retry) {
458 ret = ivtv_start(itv);
461 ret = ivtv_sendbyte(itv, addr<<1);
462 for (i = 0; ret == 0 && i < len; ++i)
463 ret = ivtv_sendbyte(itv, data[i]);
465 if (ret != 0 || do_stop) {
470 IVTV_DEBUG_I2C("i2c write to %x failed\n", addr);
474 /* Read data from the given i2c slave. A stop condition is always issued. */
475 static int ivtv_read(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len)
477 int retry, ret = -EREMOTEIO;
480 for (retry = 0; ret != 0 && retry < 8; ++retry) {
481 ret = ivtv_start(itv);
483 ret = ivtv_sendbyte(itv, (addr << 1) | 1);
484 for (i = 0; ret == 0 && i < len; ++i) {
485 ret = ivtv_readbyte(itv, &data[i], i == len - 1);
490 IVTV_DEBUG_I2C("i2c read from %x failed\n", addr);
494 /* Kernel i2c transfer implementation. Takes a number of messages to be read
495 or written. If a read follows a write, this will occur without an
496 intervening stop condition */
497 static int ivtv_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
499 struct ivtv *itv = i2c_get_adapdata(i2c_adap);
503 mutex_lock(&itv->i2c_bus_lock);
504 for (i = retval = 0; retval == 0 && i < num; i++) {
505 if (msgs[i].flags & I2C_M_RD)
506 retval = ivtv_read(itv, msgs[i].addr, msgs[i].buf, msgs[i].len);
508 /* if followed by a read, don't stop */
509 int stop = !(i + 1 < num && msgs[i + 1].flags == I2C_M_RD);
511 retval = ivtv_write(itv, msgs[i].addr, msgs[i].buf, msgs[i].len, stop);
514 mutex_unlock(&itv->i2c_bus_lock);
515 return retval ? retval : num;
518 /* Kernel i2c capabilities */
519 static u32 ivtv_functionality(struct i2c_adapter *adap)
521 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
524 static struct i2c_algorithm ivtv_algo = {
525 .master_xfer = ivtv_xfer,
526 .functionality = ivtv_functionality,
529 /* template for our-bit banger */
530 static struct i2c_adapter ivtv_i2c_adap_hw_template = {
531 .name = "ivtv i2c driver",
532 .id = I2C_HW_B_CX2341X,
534 .algo_data = NULL, /* filled from template */
535 .client_register = attach_inform,
536 .client_unregister = detach_inform,
537 .owner = THIS_MODULE,
540 static void ivtv_setscl_old(void *data, int state)
542 struct ivtv *itv = (struct ivtv *)data;
545 itv->i2c_state |= 0x01;
547 itv->i2c_state &= ~0x01;
550 /* write bits are inverted */
551 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET);
554 static void ivtv_setsda_old(void *data, int state)
556 struct ivtv *itv = (struct ivtv *)data;
559 itv->i2c_state |= 0x01;
561 itv->i2c_state &= ~0x01;
564 /* write bits are inverted */
565 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET);
568 static int ivtv_getscl_old(void *data)
570 struct ivtv *itv = (struct ivtv *)data;
572 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
575 static int ivtv_getsda_old(void *data)
577 struct ivtv *itv = (struct ivtv *)data;
579 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
582 /* template for i2c-bit-algo */
583 static struct i2c_adapter ivtv_i2c_adap_template = {
584 .name = "ivtv i2c driver",
585 .id = I2C_HW_B_CX2341X,
586 .algo = NULL, /* set by i2c-algo-bit */
587 .algo_data = NULL, /* filled from template */
588 .client_register = attach_inform,
589 .client_unregister = detach_inform,
590 .owner = THIS_MODULE,
593 static const struct i2c_algo_bit_data ivtv_i2c_algo_template = {
594 .setsda = ivtv_setsda_old,
595 .setscl = ivtv_setscl_old,
596 .getsda = ivtv_getsda_old,
597 .getscl = ivtv_getscl_old,
602 static struct i2c_client ivtv_i2c_client_template = {
603 .name = "ivtv internal",
606 int ivtv_call_i2c_client(struct ivtv *itv, int addr, unsigned int cmd, void *arg)
608 struct i2c_client *client;
612 IVTV_DEBUG_I2C("call_i2c_client addr=%02x\n", addr);
613 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
614 client = itv->i2c_clients[i];
615 if (client == NULL || client->driver == NULL ||
616 client->driver->command == NULL)
618 if (addr == client->addr) {
619 retval = client->driver->command(client, cmd, arg);
623 if (cmd != VIDIOC_G_CHIP_IDENT)
624 IVTV_ERR("i2c addr 0x%02x not found for command 0x%x\n", addr, cmd);
628 /* Find the i2c device based on the driver ID and return
629 its i2c address or -ENODEV if no matching device was found. */
630 static int ivtv_i2c_id_addr(struct ivtv *itv, u32 id)
632 struct i2c_client *client;
633 int retval = -ENODEV;
636 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
637 client = itv->i2c_clients[i];
638 if (client == NULL || client->driver == NULL)
640 if (id == client->driver->id) {
641 retval = client->addr;
648 /* Find the i2c device name matching the DRIVERID */
649 static const char *ivtv_i2c_id_name(u32 id)
653 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
654 if (hw_driverids[i] == id)
655 return hw_devicenames[i];
656 return "unknown device";
659 /* Find the i2c device name matching the IVTV_HW_ flag */
660 static const char *ivtv_i2c_hw_name(u32 hw)
664 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
666 return hw_devicenames[i];
667 return "unknown device";
670 /* Find the i2c device matching the IVTV_HW_ flag and return
671 its i2c address or -ENODEV if no matching device was found. */
672 int ivtv_i2c_hw_addr(struct ivtv *itv, u32 hw)
676 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
678 return ivtv_i2c_id_addr(itv, hw_driverids[i]);
682 /* Calls i2c device based on IVTV_HW_ flag. If hw == 0, then do nothing.
683 If hw == IVTV_HW_GPIO then call the gpio handler. */
684 int ivtv_i2c_hw(struct ivtv *itv, u32 hw, unsigned int cmd, void *arg)
688 if (hw == IVTV_HW_GPIO)
689 return ivtv_gpio(itv, cmd, arg);
693 addr = ivtv_i2c_hw_addr(itv, hw);
695 IVTV_ERR("i2c hardware 0x%08x (%s) not found for command 0x%x\n",
696 hw, ivtv_i2c_hw_name(hw), cmd);
699 return ivtv_call_i2c_client(itv, addr, cmd, arg);
702 /* Calls i2c device based on I2C driver ID. */
703 int ivtv_i2c_id(struct ivtv *itv, u32 id, unsigned int cmd, void *arg)
707 addr = ivtv_i2c_id_addr(itv, id);
709 if (cmd != VIDIOC_G_CHIP_IDENT)
710 IVTV_ERR("i2c ID 0x%08x (%s) not found for command 0x%x\n",
711 id, ivtv_i2c_id_name(id), cmd);
714 return ivtv_call_i2c_client(itv, addr, cmd, arg);
717 int ivtv_cx25840(struct ivtv *itv, unsigned int cmd, void *arg)
719 return ivtv_call_i2c_client(itv, IVTV_CX25840_I2C_ADDR, cmd, arg);
722 int ivtv_saa7115(struct ivtv *itv, unsigned int cmd, void *arg)
724 return ivtv_call_i2c_client(itv, IVTV_SAA7115_I2C_ADDR, cmd, arg);
727 int ivtv_saa7127(struct ivtv *itv, unsigned int cmd, void *arg)
729 return ivtv_call_i2c_client(itv, IVTV_SAA7127_I2C_ADDR, cmd, arg);
732 int ivtv_saa717x(struct ivtv *itv, unsigned int cmd, void *arg)
734 return ivtv_call_i2c_client(itv, IVTV_SAA717x_I2C_ADDR, cmd, arg);
737 int ivtv_upd64031a(struct ivtv *itv, unsigned int cmd, void *arg)
739 return ivtv_call_i2c_client(itv, IVTV_UPD64031A_I2C_ADDR, cmd, arg);
742 int ivtv_upd64083(struct ivtv *itv, unsigned int cmd, void *arg)
744 return ivtv_call_i2c_client(itv, IVTV_UPD64083_I2C_ADDR, cmd, arg);
747 /* broadcast cmd for all I2C clients and for the gpio subsystem */
748 void ivtv_call_i2c_clients(struct ivtv *itv, unsigned int cmd, void *arg)
750 if (itv->i2c_adap.algo == NULL) {
751 IVTV_ERR("Adapter is not set");
754 i2c_clients_command(&itv->i2c_adap, cmd, arg);
755 if (itv->hw_flags & IVTV_HW_GPIO)
756 ivtv_gpio(itv, cmd, arg);
759 /* init + register i2c algo-bit adapter */
760 int init_ivtv_i2c(struct ivtv *itv)
762 IVTV_DEBUG_I2C("i2c init\n");
764 /* Sanity checks for the I2C hardware arrays. They must be the
765 * same size and GPIO must be the last entry.
767 if (ARRAY_SIZE(hw_driverids) != ARRAY_SIZE(hw_addrs) ||
768 ARRAY_SIZE(hw_devicenames) != ARRAY_SIZE(hw_addrs) ||
769 IVTV_HW_GPIO != (1 << (ARRAY_SIZE(hw_addrs) - 1)) ||
770 hw_driverids[ARRAY_SIZE(hw_addrs) - 1]) {
771 IVTV_ERR("Mismatched I2C hardware arrays\n");
774 if (itv->options.newi2c > 0) {
775 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_hw_template,
776 sizeof(struct i2c_adapter));
778 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_template,
779 sizeof(struct i2c_adapter));
780 memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template,
781 sizeof(struct i2c_algo_bit_data));
783 itv->i2c_algo.data = itv;
784 itv->i2c_adap.algo_data = &itv->i2c_algo;
786 sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d",
788 i2c_set_adapdata(&itv->i2c_adap, itv);
790 memcpy(&itv->i2c_client, &ivtv_i2c_client_template,
791 sizeof(struct i2c_client));
792 itv->i2c_client.adapter = &itv->i2c_adap;
793 itv->i2c_adap.dev.parent = &itv->dev->dev;
795 IVTV_DEBUG_I2C("setting scl and sda to 1\n");
799 if (itv->options.newi2c > 0)
800 return i2c_add_adapter(&itv->i2c_adap);
802 return i2c_bit_add_bus(&itv->i2c_adap);
805 void exit_ivtv_i2c(struct ivtv *itv)
807 IVTV_DEBUG_I2C("i2c exit\n");
809 i2c_del_adapter(&itv->i2c_adap);