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 /* i2c implementation for cx23415/6 chip, ivtv project.
68 * Author: Kevin Thayer (nufan_wfk at yahoo.com)
71 #define IVTV_REG_I2C_SETSCL_OFFSET 0x7000
72 #define IVTV_REG_I2C_SETSDA_OFFSET 0x7004
73 #define IVTV_REG_I2C_GETSCL_OFFSET 0x7008
74 #define IVTV_REG_I2C_GETSDA_OFFSET 0x700c
76 #define IVTV_CS53L32A_I2C_ADDR 0x11
77 #define IVTV_M52790_I2C_ADDR 0x48
78 #define IVTV_CX25840_I2C_ADDR 0x44
79 #define IVTV_SAA7115_I2C_ADDR 0x21
80 #define IVTV_SAA7127_I2C_ADDR 0x44
81 #define IVTV_SAA717x_I2C_ADDR 0x21
82 #define IVTV_MSP3400_I2C_ADDR 0x40
83 #define IVTV_HAUPPAUGE_I2C_ADDR 0x50
84 #define IVTV_WM8739_I2C_ADDR 0x1a
85 #define IVTV_WM8775_I2C_ADDR 0x1b
86 #define IVTV_TEA5767_I2C_ADDR 0x60
87 #define IVTV_UPD64031A_I2C_ADDR 0x12
88 #define IVTV_UPD64083_I2C_ADDR 0x5c
89 #define IVTV_VP27SMPX_I2C_ADDR 0x5b
90 #define IVTV_M52790_I2C_ADDR 0x48
92 /* This array should match the IVTV_HW_ defines */
93 static const u8 hw_driverids[] = {
100 I2C_DRIVERID_CS53L32A,
101 I2C_DRIVERID_TVEEPROM,
102 I2C_DRIVERID_SAA711X,
103 I2C_DRIVERID_UPD64031A,
104 I2C_DRIVERID_UPD64083,
105 I2C_DRIVERID_SAA717X,
107 I2C_DRIVERID_VP27SMPX,
109 0 /* IVTV_HW_GPIO dummy driver ID */
112 /* This array should match the IVTV_HW_ defines */
113 static const u8 hw_addrs[] = {
114 IVTV_CX25840_I2C_ADDR,
115 IVTV_SAA7115_I2C_ADDR,
116 IVTV_SAA7127_I2C_ADDR,
117 IVTV_MSP3400_I2C_ADDR,
119 IVTV_WM8775_I2C_ADDR,
120 IVTV_CS53L32A_I2C_ADDR,
122 IVTV_SAA7115_I2C_ADDR,
123 IVTV_UPD64031A_I2C_ADDR,
124 IVTV_UPD64083_I2C_ADDR,
125 IVTV_SAA717x_I2C_ADDR,
126 IVTV_WM8739_I2C_ADDR,
127 IVTV_VP27SMPX_I2C_ADDR,
128 IVTV_M52790_I2C_ADDR,
129 0 /* IVTV_HW_GPIO dummy driver ID */
132 /* This array should match the IVTV_HW_ defines */
133 static const char * const hw_devicenames[] = {
136 "saa7127_auto", /* saa7127 or saa7129 */
152 int ivtv_i2c_register(struct ivtv *itv, unsigned idx)
154 struct i2c_board_info info;
155 struct i2c_client *c;
159 IVTV_DEBUG_I2C("i2c client register\n");
160 if (idx >= ARRAY_SIZE(hw_driverids) || hw_driverids[idx] == 0)
162 id = hw_driverids[idx];
163 memset(&info, 0, sizeof(info));
164 strlcpy(info.type, hw_devicenames[idx], sizeof(info.type));
165 info.addr = hw_addrs[idx];
166 for (i = 0; itv->i2c_clients[i] && i < I2C_CLIENTS_MAX; i++) {}
168 if (i == I2C_CLIENTS_MAX) {
169 IVTV_ERR("insufficient room for new I2C client!\n");
173 if (id != I2C_DRIVERID_TUNER) {
174 if (id == I2C_DRIVERID_UPD64031A ||
175 id == I2C_DRIVERID_UPD64083) {
176 unsigned short addrs[2] = { info.addr, I2C_CLIENT_END };
178 c = i2c_new_probed_device(&itv->i2c_adap, &info, addrs);
180 c = i2c_new_device(&itv->i2c_adap, &info);
181 if (c && c->driver == NULL)
182 i2c_unregister_device(c);
184 itv->i2c_clients[i] = c;
185 return itv->i2c_clients[i] ? 0 : -ENODEV;
188 /* special tuner handling */
189 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->radio);
190 if (c && c->driver == NULL)
191 i2c_unregister_device(c);
193 itv->i2c_clients[i++] = c;
194 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->demod);
195 if (c && c->driver == NULL)
196 i2c_unregister_device(c);
198 itv->i2c_clients[i++] = c;
199 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->tv);
200 if (c && c->driver == NULL)
201 i2c_unregister_device(c);
203 itv->i2c_clients[i++] = c;
207 static int attach_inform(struct i2c_client *client)
212 static int detach_inform(struct i2c_client *client)
215 struct ivtv *itv = (struct ivtv *)i2c_get_adapdata(client->adapter);
217 IVTV_DEBUG_I2C("i2c client detach\n");
218 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
219 if (itv->i2c_clients[i] == client) {
220 itv->i2c_clients[i] = NULL;
224 IVTV_DEBUG_I2C("i2c detach [client=%s,%s]\n",
225 client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
230 /* Set the serial clock line to the desired state */
231 static void ivtv_setscl(struct ivtv *itv, int state)
234 /* write bits are inverted */
235 write_reg(~state, IVTV_REG_I2C_SETSCL_OFFSET);
238 /* Set the serial data line to the desired state */
239 static void ivtv_setsda(struct ivtv *itv, int state)
242 /* write bits are inverted */
243 write_reg(~state & 1, IVTV_REG_I2C_SETSDA_OFFSET);
246 /* Read the serial clock line */
247 static int ivtv_getscl(struct ivtv *itv)
249 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
252 /* Read the serial data line */
253 static int ivtv_getsda(struct ivtv *itv)
255 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
258 /* Implement a short delay by polling the serial clock line */
259 static void ivtv_scldelay(struct ivtv *itv)
263 for (i = 0; i < 5; ++i)
267 /* Wait for the serial clock line to become set to a specific value */
268 static int ivtv_waitscl(struct ivtv *itv, int val)
273 for (i = 0; i < 1000; ++i) {
274 if (ivtv_getscl(itv) == val)
280 /* Wait for the serial data line to become set to a specific value */
281 static int ivtv_waitsda(struct ivtv *itv, int val)
286 for (i = 0; i < 1000; ++i) {
287 if (ivtv_getsda(itv) == val)
293 /* Wait for the slave to issue an ACK */
294 static int ivtv_ack(struct ivtv *itv)
298 if (ivtv_getscl(itv) == 1) {
299 IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n");
301 if (!ivtv_waitscl(itv, 0)) {
302 IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n");
309 if (!ivtv_waitsda(itv, 0)) {
310 IVTV_DEBUG_I2C("Slave did not ack\n");
314 if (!ivtv_waitscl(itv, 0)) {
315 IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n");
321 /* Write a single byte to the i2c bus and wait for the slave to ACK */
322 static int ivtv_sendbyte(struct ivtv *itv, unsigned char byte)
326 IVTV_DEBUG_HI_I2C("write %x\n",byte);
327 for (i = 0; i < 8; ++i, byte<<=1) {
329 if (!ivtv_waitscl(itv, 0)) {
330 IVTV_DEBUG_I2C("Error setting SCL low\n");
334 ivtv_setsda(itv, bit);
335 if (!ivtv_waitsda(itv, bit)) {
336 IVTV_DEBUG_I2C("Error setting SDA\n");
340 if (!ivtv_waitscl(itv, 1)) {
341 IVTV_DEBUG_I2C("Slave not ready for bit\n");
346 if (!ivtv_waitscl(itv, 0)) {
347 IVTV_DEBUG_I2C("Error setting SCL low\n");
350 return ivtv_ack(itv);
353 /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the
355 static int ivtv_readbyte(struct ivtv *itv, unsigned char *byte, int nack)
363 for (i = 0; i < 8; ++i) {
367 if (!ivtv_waitscl(itv, 1)) {
368 IVTV_DEBUG_I2C("Error setting SCL high\n");
371 *byte = ((*byte)<<1)|ivtv_getsda(itv);
375 ivtv_setsda(itv, nack);
381 IVTV_DEBUG_HI_I2C("read %x\n",*byte);
385 /* Issue a start condition on the i2c bus to alert slaves to prepare for
387 static int ivtv_start(struct ivtv *itv)
391 sda = ivtv_getsda(itv);
393 IVTV_DEBUG_HI_I2C("SDA was low at start\n");
395 if (!ivtv_waitsda(itv, 1)) {
396 IVTV_DEBUG_I2C("SDA stuck low\n");
400 if (ivtv_getscl(itv) != 1) {
402 if (!ivtv_waitscl(itv, 1)) {
403 IVTV_DEBUG_I2C("SCL stuck low at start\n");
412 /* Issue a stop condition on the i2c bus to release it */
413 static int ivtv_stop(struct ivtv *itv)
417 if (ivtv_getscl(itv) != 0) {
418 IVTV_DEBUG_HI_I2C("SCL not low when stopping\n");
420 if (!ivtv_waitscl(itv, 0)) {
421 IVTV_DEBUG_I2C("SCL could not be set low\n");
427 if (!ivtv_waitscl(itv, 1)) {
428 IVTV_DEBUG_I2C("SCL could not be set high\n");
433 if (!ivtv_waitsda(itv, 1)) {
434 IVTV_DEBUG_I2C("resetting I2C\n");
435 for (i = 0; i < 16; ++i) {
442 ivtv_waitsda(itv, 1);
448 /* Write a message to the given i2c slave. do_stop may be 0 to prevent
449 issuing the i2c stop condition (when following with a read) */
450 static int ivtv_write(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len, int do_stop)
452 int retry, ret = -EREMOTEIO;
455 for (retry = 0; ret != 0 && retry < 8; ++retry) {
456 ret = ivtv_start(itv);
459 ret = ivtv_sendbyte(itv, addr<<1);
460 for (i = 0; ret == 0 && i < len; ++i)
461 ret = ivtv_sendbyte(itv, data[i]);
463 if (ret != 0 || do_stop) {
468 IVTV_DEBUG_I2C("i2c write to %x failed\n", addr);
472 /* Read data from the given i2c slave. A stop condition is always issued. */
473 static int ivtv_read(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len)
475 int retry, ret = -EREMOTEIO;
478 for (retry = 0; ret != 0 && retry < 8; ++retry) {
479 ret = ivtv_start(itv);
481 ret = ivtv_sendbyte(itv, (addr << 1) | 1);
482 for (i = 0; ret == 0 && i < len; ++i) {
483 ret = ivtv_readbyte(itv, &data[i], i == len - 1);
488 IVTV_DEBUG_I2C("i2c read from %x failed\n", addr);
492 /* Kernel i2c transfer implementation. Takes a number of messages to be read
493 or written. If a read follows a write, this will occur without an
494 intervening stop condition */
495 static int ivtv_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
497 struct ivtv *itv = i2c_get_adapdata(i2c_adap);
501 mutex_lock(&itv->i2c_bus_lock);
502 for (i = retval = 0; retval == 0 && i < num; i++) {
503 if (msgs[i].flags & I2C_M_RD)
504 retval = ivtv_read(itv, msgs[i].addr, msgs[i].buf, msgs[i].len);
506 /* if followed by a read, don't stop */
507 int stop = !(i + 1 < num && msgs[i + 1].flags == I2C_M_RD);
509 retval = ivtv_write(itv, msgs[i].addr, msgs[i].buf, msgs[i].len, stop);
512 mutex_unlock(&itv->i2c_bus_lock);
513 return retval ? retval : num;
516 /* Kernel i2c capabilities */
517 static u32 ivtv_functionality(struct i2c_adapter *adap)
519 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
522 static struct i2c_algorithm ivtv_algo = {
523 .master_xfer = ivtv_xfer,
524 .functionality = ivtv_functionality,
527 /* template for our-bit banger */
528 static struct i2c_adapter ivtv_i2c_adap_hw_template = {
529 .name = "ivtv i2c driver",
530 .id = I2C_HW_B_CX2341X,
532 .algo_data = NULL, /* filled from template */
533 .client_register = attach_inform,
534 .client_unregister = detach_inform,
535 .owner = THIS_MODULE,
538 static void ivtv_setscl_old(void *data, int state)
540 struct ivtv *itv = (struct ivtv *)data;
543 itv->i2c_state |= 0x01;
545 itv->i2c_state &= ~0x01;
548 /* write bits are inverted */
549 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET);
552 static void ivtv_setsda_old(void *data, int state)
554 struct ivtv *itv = (struct ivtv *)data;
557 itv->i2c_state |= 0x01;
559 itv->i2c_state &= ~0x01;
562 /* write bits are inverted */
563 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET);
566 static int ivtv_getscl_old(void *data)
568 struct ivtv *itv = (struct ivtv *)data;
570 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
573 static int ivtv_getsda_old(void *data)
575 struct ivtv *itv = (struct ivtv *)data;
577 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
580 /* template for i2c-bit-algo */
581 static struct i2c_adapter ivtv_i2c_adap_template = {
582 .name = "ivtv i2c driver",
583 .id = I2C_HW_B_CX2341X,
584 .algo = NULL, /* set by i2c-algo-bit */
585 .algo_data = NULL, /* filled from template */
586 .client_register = attach_inform,
587 .client_unregister = detach_inform,
588 .owner = THIS_MODULE,
591 static const struct i2c_algo_bit_data ivtv_i2c_algo_template = {
592 .setsda = ivtv_setsda_old,
593 .setscl = ivtv_setscl_old,
594 .getsda = ivtv_getsda_old,
595 .getscl = ivtv_getscl_old,
600 static struct i2c_client ivtv_i2c_client_template = {
601 .name = "ivtv internal",
604 int ivtv_call_i2c_client(struct ivtv *itv, int addr, unsigned int cmd, void *arg)
606 struct i2c_client *client;
610 IVTV_DEBUG_I2C("call_i2c_client addr=%02x\n", addr);
611 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
612 client = itv->i2c_clients[i];
613 if (client == NULL || client->driver == NULL ||
614 client->driver->command == NULL)
616 if (addr == client->addr) {
617 retval = client->driver->command(client, cmd, arg);
621 if (cmd != VIDIOC_G_CHIP_IDENT)
622 IVTV_ERR("i2c addr 0x%02x not found for command 0x%x\n", addr, cmd);
626 /* Find the i2c device based on the driver ID and return
627 its i2c address or -ENODEV if no matching device was found. */
628 static int ivtv_i2c_id_addr(struct ivtv *itv, u32 id)
630 struct i2c_client *client;
631 int retval = -ENODEV;
634 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
635 client = itv->i2c_clients[i];
636 if (client == NULL || client->driver == NULL)
638 if (id == client->driver->id) {
639 retval = client->addr;
646 /* Find the i2c device name matching the DRIVERID */
647 static const char *ivtv_i2c_id_name(u32 id)
651 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
652 if (hw_driverids[i] == id)
653 return hw_devicenames[i];
654 return "unknown device";
657 /* Find the i2c device name matching the IVTV_HW_ flag */
658 static const char *ivtv_i2c_hw_name(u32 hw)
662 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
664 return hw_devicenames[i];
665 return "unknown device";
668 /* Find the i2c device matching the IVTV_HW_ flag and return
669 its i2c address or -ENODEV if no matching device was found. */
670 int ivtv_i2c_hw_addr(struct ivtv *itv, u32 hw)
674 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
676 return ivtv_i2c_id_addr(itv, hw_driverids[i]);
680 /* Calls i2c device based on IVTV_HW_ flag. If hw == 0, then do nothing.
681 If hw == IVTV_HW_GPIO then call the gpio handler. */
682 int ivtv_i2c_hw(struct ivtv *itv, u32 hw, unsigned int cmd, void *arg)
686 if (hw == IVTV_HW_GPIO)
687 return ivtv_gpio(itv, cmd, arg);
691 addr = ivtv_i2c_hw_addr(itv, hw);
693 IVTV_ERR("i2c hardware 0x%08x (%s) not found for command 0x%x\n",
694 hw, ivtv_i2c_hw_name(hw), cmd);
697 return ivtv_call_i2c_client(itv, addr, cmd, arg);
700 /* Calls i2c device based on I2C driver ID. */
701 int ivtv_i2c_id(struct ivtv *itv, u32 id, unsigned int cmd, void *arg)
705 addr = ivtv_i2c_id_addr(itv, id);
707 if (cmd != VIDIOC_G_CHIP_IDENT)
708 IVTV_ERR("i2c ID 0x%08x (%s) not found for command 0x%x\n",
709 id, ivtv_i2c_id_name(id), cmd);
712 return ivtv_call_i2c_client(itv, addr, cmd, arg);
715 int ivtv_cx25840(struct ivtv *itv, unsigned int cmd, void *arg)
717 return ivtv_call_i2c_client(itv, IVTV_CX25840_I2C_ADDR, cmd, arg);
720 int ivtv_saa7115(struct ivtv *itv, unsigned int cmd, void *arg)
722 return ivtv_call_i2c_client(itv, IVTV_SAA7115_I2C_ADDR, cmd, arg);
725 int ivtv_saa7127(struct ivtv *itv, unsigned int cmd, void *arg)
727 return ivtv_call_i2c_client(itv, IVTV_SAA7127_I2C_ADDR, cmd, arg);
729 EXPORT_SYMBOL(ivtv_saa7127);
731 int ivtv_saa717x(struct ivtv *itv, unsigned int cmd, void *arg)
733 return ivtv_call_i2c_client(itv, IVTV_SAA717x_I2C_ADDR, cmd, arg);
736 int ivtv_upd64031a(struct ivtv *itv, unsigned int cmd, void *arg)
738 return ivtv_call_i2c_client(itv, IVTV_UPD64031A_I2C_ADDR, cmd, arg);
741 int ivtv_upd64083(struct ivtv *itv, unsigned int cmd, void *arg)
743 return ivtv_call_i2c_client(itv, IVTV_UPD64083_I2C_ADDR, cmd, arg);
746 /* broadcast cmd for all I2C clients and for the gpio subsystem */
747 void ivtv_call_i2c_clients(struct ivtv *itv, unsigned int cmd, void *arg)
749 if (itv->i2c_adap.algo == NULL) {
750 IVTV_ERR("Adapter is not set");
753 i2c_clients_command(&itv->i2c_adap, cmd, arg);
754 if (itv->hw_flags & IVTV_HW_GPIO)
755 ivtv_gpio(itv, cmd, arg);
758 /* init + register i2c algo-bit adapter */
759 int init_ivtv_i2c(struct ivtv *itv)
761 IVTV_DEBUG_I2C("i2c init\n");
763 /* Sanity checks for the I2C hardware arrays. They must be the
764 * same size and GPIO must be the last entry.
766 if (ARRAY_SIZE(hw_driverids) != ARRAY_SIZE(hw_addrs) ||
767 ARRAY_SIZE(hw_devicenames) != ARRAY_SIZE(hw_addrs) ||
768 IVTV_HW_GPIO != (1 << (ARRAY_SIZE(hw_addrs) - 1)) ||
769 hw_driverids[ARRAY_SIZE(hw_addrs) - 1]) {
770 IVTV_ERR("Mismatched I2C hardware arrays\n");
773 if (itv->options.newi2c > 0) {
774 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_hw_template,
775 sizeof(struct i2c_adapter));
777 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_template,
778 sizeof(struct i2c_adapter));
779 memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template,
780 sizeof(struct i2c_algo_bit_data));
782 itv->i2c_algo.data = itv;
783 itv->i2c_adap.algo_data = &itv->i2c_algo;
785 sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d",
787 i2c_set_adapdata(&itv->i2c_adap, itv);
789 memcpy(&itv->i2c_client, &ivtv_i2c_client_template,
790 sizeof(struct i2c_client));
791 itv->i2c_client.adapter = &itv->i2c_adap;
792 itv->i2c_adap.dev.parent = &itv->dev->dev;
794 IVTV_DEBUG_I2C("setting scl and sda to 1\n");
798 if (itv->options.newi2c > 0)
799 return i2c_add_adapter(&itv->i2c_adap);
801 return i2c_bit_add_bus(&itv->i2c_adap);
804 void exit_ivtv_i2c(struct ivtv *itv)
806 IVTV_DEBUG_I2C("i2c exit\n");
808 i2c_del_adapter(&itv->i2c_adap);