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"
66 #include <media/cx25840.h>
68 /* i2c implementation for cx23415/6 chip, ivtv project.
69 * Author: Kevin Thayer (nufan_wfk at yahoo.com)
72 #define IVTV_REG_I2C_SETSCL_OFFSET 0x7000
73 #define IVTV_REG_I2C_SETSDA_OFFSET 0x7004
74 #define IVTV_REG_I2C_GETSCL_OFFSET 0x7008
75 #define IVTV_REG_I2C_GETSDA_OFFSET 0x700c
77 #define IVTV_CS53L32A_I2C_ADDR 0x11
78 #define IVTV_M52790_I2C_ADDR 0x48
79 #define IVTV_CX25840_I2C_ADDR 0x44
80 #define IVTV_SAA7115_I2C_ADDR 0x21
81 #define IVTV_SAA7127_I2C_ADDR 0x44
82 #define IVTV_SAA717x_I2C_ADDR 0x21
83 #define IVTV_MSP3400_I2C_ADDR 0x40
84 #define IVTV_HAUPPAUGE_I2C_ADDR 0x50
85 #define IVTV_WM8739_I2C_ADDR 0x1a
86 #define IVTV_WM8775_I2C_ADDR 0x1b
87 #define IVTV_TEA5767_I2C_ADDR 0x60
88 #define IVTV_UPD64031A_I2C_ADDR 0x12
89 #define IVTV_UPD64083_I2C_ADDR 0x5c
90 #define IVTV_VP27SMPX_I2C_ADDR 0x5b
91 #define IVTV_M52790_I2C_ADDR 0x48
92 #define IVTV_AVERMEDIA_IR_RX_I2C_ADDR 0x40
93 #define IVTV_HAUP_EXT_IR_RX_I2C_ADDR 0x1a
94 #define IVTV_HAUP_INT_IR_RX_I2C_ADDR 0x18
95 #define IVTV_Z8F0811_IR_TX_I2C_ADDR 0x70
96 #define IVTV_Z8F0811_IR_RX_I2C_ADDR 0x71
98 /* This array should match the IVTV_HW_ defines */
99 static const u8 hw_addrs[] = {
100 IVTV_CX25840_I2C_ADDR,
101 IVTV_SAA7115_I2C_ADDR,
102 IVTV_SAA7127_I2C_ADDR,
103 IVTV_MSP3400_I2C_ADDR,
105 IVTV_WM8775_I2C_ADDR,
106 IVTV_CS53L32A_I2C_ADDR,
108 IVTV_SAA7115_I2C_ADDR,
109 IVTV_UPD64031A_I2C_ADDR,
110 IVTV_UPD64083_I2C_ADDR,
111 IVTV_SAA717x_I2C_ADDR,
112 IVTV_WM8739_I2C_ADDR,
113 IVTV_VP27SMPX_I2C_ADDR,
114 IVTV_M52790_I2C_ADDR,
115 0, /* IVTV_HW_GPIO dummy driver ID */
116 IVTV_AVERMEDIA_IR_RX_I2C_ADDR, /* IVTV_HW_I2C_IR_RX_AVER */
117 IVTV_HAUP_EXT_IR_RX_I2C_ADDR, /* IVTV_HW_I2C_IR_RX_HAUP_EXT */
118 IVTV_HAUP_INT_IR_RX_I2C_ADDR, /* IVTV_HW_I2C_IR_RX_HAUP_INT */
119 IVTV_Z8F0811_IR_TX_I2C_ADDR, /* IVTV_HW_Z8F0811_IR_TX_HAUP */
120 IVTV_Z8F0811_IR_RX_I2C_ADDR, /* IVTV_HW_Z8F0811_IR_RX_HAUP */
123 /* This array should match the IVTV_HW_ defines */
124 static const char *hw_modules[] = {
141 NULL, /* IVTV_HW_I2C_IR_RX_AVER */
142 NULL, /* IVTV_HW_I2C_IR_RX_HAUP_EXT */
143 NULL, /* IVTV_HW_I2C_IR_RX_HAUP_INT */
144 NULL, /* IVTV_HW_Z8F0811_IR_TX_HAUP */
145 NULL, /* IVTV_HW_Z8F0811_IR_RX_HAUP */
148 /* This array should match the IVTV_HW_ defines */
149 static const char * const hw_devicenames[] = {
152 "saa7127_auto", /* saa7127 or saa7129 */
166 "ir_video", /* IVTV_HW_I2C_IR_RX_AVER */
167 "ir_video", /* IVTV_HW_I2C_IR_RX_HAUP_EXT */
168 "ir_video", /* IVTV_HW_I2C_IR_RX_HAUP_INT */
169 "ir_tx_z8f0811_haup", /* IVTV_HW_Z8F0811_IR_TX_HAUP */
170 "ir_rx_z8f0811_haup", /* IVTV_HW_Z8F0811_IR_RX_HAUP */
173 static int ivtv_i2c_new_ir(struct ivtv *itv, u32 hw, const char *type, u8 addr)
175 struct i2c_board_info info;
176 struct i2c_adapter *adap = &itv->i2c_adap;
177 struct IR_i2c_init_data *init_data = &itv->ir_i2c_init_data;
178 unsigned short addr_list[2] = { addr, I2C_CLIENT_END };
180 /* Only allow one IR transmitter to be registered per board */
181 if (hw & IVTV_HW_IR_TX_ANY) {
182 if (itv->hw_flags & IVTV_HW_IR_TX_ANY)
184 memset(&info, 0, sizeof(struct i2c_board_info));
185 strlcpy(info.type, type, I2C_NAME_SIZE);
186 return i2c_new_probed_device(adap, &info, addr_list) == NULL
190 /* Only allow one IR receiver to be registered per board */
191 if (itv->hw_flags & IVTV_HW_IR_RX_ANY)
194 /* Our default information for ir-kbd-i2c.c to use */
196 case IVTV_HW_I2C_IR_RX_AVER:
197 init_data->ir_codes = RC_MAP_AVERMEDIA_CARDBUS;
198 init_data->internal_get_key_func =
199 IR_KBD_GET_KEY_AVERMEDIA_CARDBUS;
200 init_data->type = IR_TYPE_OTHER;
201 init_data->name = "AVerMedia AVerTV card";
203 case IVTV_HW_I2C_IR_RX_HAUP_EXT:
204 case IVTV_HW_I2C_IR_RX_HAUP_INT:
205 /* Default to old black remote */
206 init_data->ir_codes = RC_MAP_RC5_TV;
207 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP;
208 init_data->type = IR_TYPE_RC5;
209 init_data->name = itv->card_name;
211 case IVTV_HW_Z8F0811_IR_RX_HAUP:
212 /* Default to grey remote */
213 init_data->ir_codes = RC_MAP_HAUPPAUGE_NEW;
214 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
215 init_data->type = IR_TYPE_RC5;
216 init_data->name = itv->card_name;
220 memset(&info, 0, sizeof(struct i2c_board_info));
221 info.platform_data = init_data;
222 strlcpy(info.type, type, I2C_NAME_SIZE);
224 return i2c_new_probed_device(adap, &info, addr_list) == NULL ? -1 : 0;
227 /* Instantiate the IR receiver device using probing -- undesirable */
228 struct i2c_client *ivtv_i2c_new_ir_legacy(struct ivtv *itv)
230 struct i2c_board_info info;
232 * The external IR receiver is at i2c address 0x34.
233 * The internal IR receiver is at i2c address 0x30.
235 * In theory, both can be fitted, and Hauppauge suggests an external
236 * overrides an internal. That's why we probe 0x1a (~0x34) first. CB
238 * Some of these addresses we probe may collide with other i2c address
239 * allocations, so this function must be called after all other i2c
240 * devices we care about are registered.
242 const unsigned short addr_list[] = {
243 0x1a, /* Hauppauge IR external - collides with WM8739 */
244 0x18, /* Hauppauge IR internal */
245 0x71, /* Hauppauge IR (PVR150) */
246 0x6b, /* Adaptec IR */
250 memset(&info, 0, sizeof(struct i2c_board_info));
251 strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
252 return i2c_new_probed_device(&itv->i2c_adap, &info, addr_list);
255 int ivtv_i2c_register(struct ivtv *itv, unsigned idx)
257 struct v4l2_subdev *sd;
258 struct i2c_adapter *adap = &itv->i2c_adap;
259 const char *mod = hw_modules[idx];
260 const char *type = hw_devicenames[idx];
263 if (idx >= ARRAY_SIZE(hw_addrs))
265 if (hw == IVTV_HW_TUNER) {
266 /* special tuner handling */
267 sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,
269 0, itv->card_i2c->radio);
271 sd->grp_id = 1 << idx;
272 sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,
274 0, itv->card_i2c->demod);
276 sd->grp_id = 1 << idx;
277 sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,
279 0, itv->card_i2c->tv);
281 sd->grp_id = 1 << idx;
285 if (hw & IVTV_HW_IR_ANY)
286 return ivtv_i2c_new_ir(itv, hw, type, hw_addrs[idx]);
288 /* Is it not an I2C device or one we do not wish to register? */
292 /* It's an I2C device other than an analog tuner or IR chip */
293 if (hw == IVTV_HW_UPD64031A || hw == IVTV_HW_UPD6408X) {
294 sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,
295 adap, mod, type, 0, I2C_ADDRS(hw_addrs[idx]));
296 } else if (hw == IVTV_HW_CX25840) {
297 struct cx25840_platform_data pdata;
299 pdata.pvr150_workaround = itv->pvr150_workaround;
300 sd = v4l2_i2c_new_subdev_cfg(&itv->v4l2_dev,
301 adap, mod, type, 0, &pdata, hw_addrs[idx], NULL);
303 sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,
304 adap, mod, type, hw_addrs[idx], NULL);
307 sd->grp_id = 1 << idx;
311 struct v4l2_subdev *ivtv_find_hw(struct ivtv *itv, u32 hw)
313 struct v4l2_subdev *result = NULL;
314 struct v4l2_subdev *sd;
316 spin_lock(&itv->v4l2_dev.lock);
317 v4l2_device_for_each_subdev(sd, &itv->v4l2_dev) {
318 if (sd->grp_id == hw) {
323 spin_unlock(&itv->v4l2_dev.lock);
327 /* Set the serial clock line to the desired state */
328 static void ivtv_setscl(struct ivtv *itv, int state)
331 /* write bits are inverted */
332 write_reg(~state, IVTV_REG_I2C_SETSCL_OFFSET);
335 /* Set the serial data line to the desired state */
336 static void ivtv_setsda(struct ivtv *itv, int state)
339 /* write bits are inverted */
340 write_reg(~state & 1, IVTV_REG_I2C_SETSDA_OFFSET);
343 /* Read the serial clock line */
344 static int ivtv_getscl(struct ivtv *itv)
346 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
349 /* Read the serial data line */
350 static int ivtv_getsda(struct ivtv *itv)
352 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
355 /* Implement a short delay by polling the serial clock line */
356 static void ivtv_scldelay(struct ivtv *itv)
360 for (i = 0; i < 5; ++i)
364 /* Wait for the serial clock line to become set to a specific value */
365 static int ivtv_waitscl(struct ivtv *itv, int val)
370 for (i = 0; i < 1000; ++i) {
371 if (ivtv_getscl(itv) == val)
377 /* Wait for the serial data line to become set to a specific value */
378 static int ivtv_waitsda(struct ivtv *itv, int val)
383 for (i = 0; i < 1000; ++i) {
384 if (ivtv_getsda(itv) == val)
390 /* Wait for the slave to issue an ACK */
391 static int ivtv_ack(struct ivtv *itv)
395 if (ivtv_getscl(itv) == 1) {
396 IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n");
398 if (!ivtv_waitscl(itv, 0)) {
399 IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n");
406 if (!ivtv_waitsda(itv, 0)) {
407 IVTV_DEBUG_I2C("Slave did not ack\n");
411 if (!ivtv_waitscl(itv, 0)) {
412 IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n");
418 /* Write a single byte to the i2c bus and wait for the slave to ACK */
419 static int ivtv_sendbyte(struct ivtv *itv, unsigned char byte)
423 IVTV_DEBUG_HI_I2C("write %x\n",byte);
424 for (i = 0; i < 8; ++i, byte<<=1) {
426 if (!ivtv_waitscl(itv, 0)) {
427 IVTV_DEBUG_I2C("Error setting SCL low\n");
431 ivtv_setsda(itv, bit);
432 if (!ivtv_waitsda(itv, bit)) {
433 IVTV_DEBUG_I2C("Error setting SDA\n");
437 if (!ivtv_waitscl(itv, 1)) {
438 IVTV_DEBUG_I2C("Slave not ready for bit\n");
443 if (!ivtv_waitscl(itv, 0)) {
444 IVTV_DEBUG_I2C("Error setting SCL low\n");
447 return ivtv_ack(itv);
450 /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the
452 static int ivtv_readbyte(struct ivtv *itv, unsigned char *byte, int nack)
460 for (i = 0; i < 8; ++i) {
464 if (!ivtv_waitscl(itv, 1)) {
465 IVTV_DEBUG_I2C("Error setting SCL high\n");
468 *byte = ((*byte)<<1)|ivtv_getsda(itv);
472 ivtv_setsda(itv, nack);
478 IVTV_DEBUG_HI_I2C("read %x\n",*byte);
482 /* Issue a start condition on the i2c bus to alert slaves to prepare for
484 static int ivtv_start(struct ivtv *itv)
488 sda = ivtv_getsda(itv);
490 IVTV_DEBUG_HI_I2C("SDA was low at start\n");
492 if (!ivtv_waitsda(itv, 1)) {
493 IVTV_DEBUG_I2C("SDA stuck low\n");
497 if (ivtv_getscl(itv) != 1) {
499 if (!ivtv_waitscl(itv, 1)) {
500 IVTV_DEBUG_I2C("SCL stuck low at start\n");
509 /* Issue a stop condition on the i2c bus to release it */
510 static int ivtv_stop(struct ivtv *itv)
514 if (ivtv_getscl(itv) != 0) {
515 IVTV_DEBUG_HI_I2C("SCL not low when stopping\n");
517 if (!ivtv_waitscl(itv, 0)) {
518 IVTV_DEBUG_I2C("SCL could not be set low\n");
524 if (!ivtv_waitscl(itv, 1)) {
525 IVTV_DEBUG_I2C("SCL could not be set high\n");
530 if (!ivtv_waitsda(itv, 1)) {
531 IVTV_DEBUG_I2C("resetting I2C\n");
532 for (i = 0; i < 16; ++i) {
539 ivtv_waitsda(itv, 1);
545 /* Write a message to the given i2c slave. do_stop may be 0 to prevent
546 issuing the i2c stop condition (when following with a read) */
547 static int ivtv_write(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len, int do_stop)
549 int retry, ret = -EREMOTEIO;
552 for (retry = 0; ret != 0 && retry < 8; ++retry) {
553 ret = ivtv_start(itv);
556 ret = ivtv_sendbyte(itv, addr<<1);
557 for (i = 0; ret == 0 && i < len; ++i)
558 ret = ivtv_sendbyte(itv, data[i]);
560 if (ret != 0 || do_stop) {
565 IVTV_DEBUG_I2C("i2c write to %x failed\n", addr);
569 /* Read data from the given i2c slave. A stop condition is always issued. */
570 static int ivtv_read(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len)
572 int retry, ret = -EREMOTEIO;
575 for (retry = 0; ret != 0 && retry < 8; ++retry) {
576 ret = ivtv_start(itv);
578 ret = ivtv_sendbyte(itv, (addr << 1) | 1);
579 for (i = 0; ret == 0 && i < len; ++i) {
580 ret = ivtv_readbyte(itv, &data[i], i == len - 1);
585 IVTV_DEBUG_I2C("i2c read from %x failed\n", addr);
589 /* Kernel i2c transfer implementation. Takes a number of messages to be read
590 or written. If a read follows a write, this will occur without an
591 intervening stop condition */
592 static int ivtv_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
594 struct v4l2_device *v4l2_dev = i2c_get_adapdata(i2c_adap);
595 struct ivtv *itv = to_ivtv(v4l2_dev);
599 mutex_lock(&itv->i2c_bus_lock);
600 for (i = retval = 0; retval == 0 && i < num; i++) {
601 if (msgs[i].flags & I2C_M_RD)
602 retval = ivtv_read(itv, msgs[i].addr, msgs[i].buf, msgs[i].len);
604 /* if followed by a read, don't stop */
605 int stop = !(i + 1 < num && msgs[i + 1].flags == I2C_M_RD);
607 retval = ivtv_write(itv, msgs[i].addr, msgs[i].buf, msgs[i].len, stop);
610 mutex_unlock(&itv->i2c_bus_lock);
611 return retval ? retval : num;
614 /* Kernel i2c capabilities */
615 static u32 ivtv_functionality(struct i2c_adapter *adap)
617 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
620 static struct i2c_algorithm ivtv_algo = {
621 .master_xfer = ivtv_xfer,
622 .functionality = ivtv_functionality,
625 /* template for our-bit banger */
626 static struct i2c_adapter ivtv_i2c_adap_hw_template = {
627 .name = "ivtv i2c driver",
629 .algo_data = NULL, /* filled from template */
630 .owner = THIS_MODULE,
633 static void ivtv_setscl_old(void *data, int state)
635 struct ivtv *itv = (struct ivtv *)data;
638 itv->i2c_state |= 0x01;
640 itv->i2c_state &= ~0x01;
643 /* write bits are inverted */
644 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET);
647 static void ivtv_setsda_old(void *data, int state)
649 struct ivtv *itv = (struct ivtv *)data;
652 itv->i2c_state |= 0x01;
654 itv->i2c_state &= ~0x01;
657 /* write bits are inverted */
658 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET);
661 static int ivtv_getscl_old(void *data)
663 struct ivtv *itv = (struct ivtv *)data;
665 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
668 static int ivtv_getsda_old(void *data)
670 struct ivtv *itv = (struct ivtv *)data;
672 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
675 /* template for i2c-bit-algo */
676 static struct i2c_adapter ivtv_i2c_adap_template = {
677 .name = "ivtv i2c driver",
678 .algo = NULL, /* set by i2c-algo-bit */
679 .algo_data = NULL, /* filled from template */
680 .owner = THIS_MODULE,
683 #define IVTV_ALGO_BIT_TIMEOUT (2) /* seconds */
685 static const struct i2c_algo_bit_data ivtv_i2c_algo_template = {
686 .setsda = ivtv_setsda_old,
687 .setscl = ivtv_setscl_old,
688 .getsda = ivtv_getsda_old,
689 .getscl = ivtv_getscl_old,
690 .udelay = IVTV_DEFAULT_I2C_CLOCK_PERIOD / 2, /* microseconds */
691 .timeout = IVTV_ALGO_BIT_TIMEOUT * HZ, /* jiffies */
694 static struct i2c_client ivtv_i2c_client_template = {
695 .name = "ivtv internal",
698 /* init + register i2c adapter */
699 int init_ivtv_i2c(struct ivtv *itv)
703 IVTV_DEBUG_I2C("i2c init\n");
705 /* Sanity checks for the I2C hardware arrays. They must be the
708 if (ARRAY_SIZE(hw_devicenames) != ARRAY_SIZE(hw_addrs) ||
709 ARRAY_SIZE(hw_devicenames) != ARRAY_SIZE(hw_modules)) {
710 IVTV_ERR("Mismatched I2C hardware arrays\n");
713 if (itv->options.newi2c > 0) {
714 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_hw_template,
715 sizeof(struct i2c_adapter));
717 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_template,
718 sizeof(struct i2c_adapter));
719 memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template,
720 sizeof(struct i2c_algo_bit_data));
722 itv->i2c_algo.udelay = itv->options.i2c_clock_period / 2;
723 itv->i2c_algo.data = itv;
724 itv->i2c_adap.algo_data = &itv->i2c_algo;
726 sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d",
728 i2c_set_adapdata(&itv->i2c_adap, &itv->v4l2_dev);
730 memcpy(&itv->i2c_client, &ivtv_i2c_client_template,
731 sizeof(struct i2c_client));
732 itv->i2c_client.adapter = &itv->i2c_adap;
733 itv->i2c_adap.dev.parent = &itv->pdev->dev;
735 IVTV_DEBUG_I2C("setting scl and sda to 1\n");
739 if (itv->options.newi2c > 0)
740 retval = i2c_add_adapter(&itv->i2c_adap);
742 retval = i2c_bit_add_bus(&itv->i2c_adap);
747 void exit_ivtv_i2c(struct ivtv *itv)
749 IVTV_DEBUG_I2C("i2c exit\n");
751 i2c_del_adapter(&itv->i2c_adap);