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 strlcpy(info.driver_name, hw_drivernames[idx],
171 sizeof(info.driver_name));
172 info.addr = hw_addrs[idx];
173 for (i = 0; itv->i2c_clients[i] && i < I2C_CLIENTS_MAX; i++) {}
175 if (i == I2C_CLIENTS_MAX) {
176 IVTV_ERR("insufficient room for new I2C client!\n");
180 if (id != I2C_DRIVERID_TUNER) {
181 if (id == I2C_DRIVERID_UPD64031A ||
182 id == I2C_DRIVERID_UPD64083) {
183 unsigned short addrs[2] = { info.addr, I2C_CLIENT_END };
185 c = i2c_new_probed_device(&itv->i2c_adap, &info, addrs);
187 c = i2c_new_device(&itv->i2c_adap, &info);
188 if (c && c->driver == NULL)
189 i2c_unregister_device(c);
191 itv->i2c_clients[i] = c;
192 return itv->i2c_clients[i] ? 0 : -ENODEV;
195 /* special tuner handling */
196 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->radio);
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->demod);
202 if (c && c->driver == NULL)
203 i2c_unregister_device(c);
205 itv->i2c_clients[i++] = c;
206 c = i2c_new_probed_device(&itv->i2c_adap, &info, itv->card_i2c->tv);
207 if (c && c->driver == NULL)
208 i2c_unregister_device(c);
210 itv->i2c_clients[i++] = c;
214 static int attach_inform(struct i2c_client *client)
219 static int detach_inform(struct i2c_client *client)
222 struct ivtv *itv = (struct ivtv *)i2c_get_adapdata(client->adapter);
224 IVTV_DEBUG_I2C("i2c client detach\n");
225 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
226 if (itv->i2c_clients[i] == client) {
227 itv->i2c_clients[i] = NULL;
231 IVTV_DEBUG_I2C("i2c detach [client=%s,%s]\n",
232 client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
237 /* Set the serial clock line to the desired state */
238 static void ivtv_setscl(struct ivtv *itv, int state)
241 /* write bits are inverted */
242 write_reg(~state, IVTV_REG_I2C_SETSCL_OFFSET);
245 /* Set the serial data line to the desired state */
246 static void ivtv_setsda(struct ivtv *itv, int state)
249 /* write bits are inverted */
250 write_reg(~state & 1, IVTV_REG_I2C_SETSDA_OFFSET);
253 /* Read the serial clock line */
254 static int ivtv_getscl(struct ivtv *itv)
256 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
259 /* Read the serial data line */
260 static int ivtv_getsda(struct ivtv *itv)
262 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
265 /* Implement a short delay by polling the serial clock line */
266 static void ivtv_scldelay(struct ivtv *itv)
270 for (i = 0; i < 5; ++i)
274 /* Wait for the serial clock line to become set to a specific value */
275 static int ivtv_waitscl(struct ivtv *itv, int val)
280 for (i = 0; i < 1000; ++i) {
281 if (ivtv_getscl(itv) == val)
287 /* Wait for the serial data line to become set to a specific value */
288 static int ivtv_waitsda(struct ivtv *itv, int val)
293 for (i = 0; i < 1000; ++i) {
294 if (ivtv_getsda(itv) == val)
300 /* Wait for the slave to issue an ACK */
301 static int ivtv_ack(struct ivtv *itv)
305 if (ivtv_getscl(itv) == 1) {
306 IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n");
308 if (!ivtv_waitscl(itv, 0)) {
309 IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n");
316 if (!ivtv_waitsda(itv, 0)) {
317 IVTV_DEBUG_I2C("Slave did not ack\n");
321 if (!ivtv_waitscl(itv, 0)) {
322 IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n");
328 /* Write a single byte to the i2c bus and wait for the slave to ACK */
329 static int ivtv_sendbyte(struct ivtv *itv, unsigned char byte)
333 IVTV_DEBUG_HI_I2C("write %x\n",byte);
334 for (i = 0; i < 8; ++i, byte<<=1) {
336 if (!ivtv_waitscl(itv, 0)) {
337 IVTV_DEBUG_I2C("Error setting SCL low\n");
341 ivtv_setsda(itv, bit);
342 if (!ivtv_waitsda(itv, bit)) {
343 IVTV_DEBUG_I2C("Error setting SDA\n");
347 if (!ivtv_waitscl(itv, 1)) {
348 IVTV_DEBUG_I2C("Slave not ready for bit\n");
353 if (!ivtv_waitscl(itv, 0)) {
354 IVTV_DEBUG_I2C("Error setting SCL low\n");
357 return ivtv_ack(itv);
360 /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the
362 static int ivtv_readbyte(struct ivtv *itv, unsigned char *byte, int nack)
370 for (i = 0; i < 8; ++i) {
374 if (!ivtv_waitscl(itv, 1)) {
375 IVTV_DEBUG_I2C("Error setting SCL high\n");
378 *byte = ((*byte)<<1)|ivtv_getsda(itv);
382 ivtv_setsda(itv, nack);
388 IVTV_DEBUG_HI_I2C("read %x\n",*byte);
392 /* Issue a start condition on the i2c bus to alert slaves to prepare for
394 static int ivtv_start(struct ivtv *itv)
398 sda = ivtv_getsda(itv);
400 IVTV_DEBUG_HI_I2C("SDA was low at start\n");
402 if (!ivtv_waitsda(itv, 1)) {
403 IVTV_DEBUG_I2C("SDA stuck low\n");
407 if (ivtv_getscl(itv) != 1) {
409 if (!ivtv_waitscl(itv, 1)) {
410 IVTV_DEBUG_I2C("SCL stuck low at start\n");
419 /* Issue a stop condition on the i2c bus to release it */
420 static int ivtv_stop(struct ivtv *itv)
424 if (ivtv_getscl(itv) != 0) {
425 IVTV_DEBUG_HI_I2C("SCL not low when stopping\n");
427 if (!ivtv_waitscl(itv, 0)) {
428 IVTV_DEBUG_I2C("SCL could not be set low\n");
434 if (!ivtv_waitscl(itv, 1)) {
435 IVTV_DEBUG_I2C("SCL could not be set high\n");
440 if (!ivtv_waitsda(itv, 1)) {
441 IVTV_DEBUG_I2C("resetting I2C\n");
442 for (i = 0; i < 16; ++i) {
449 ivtv_waitsda(itv, 1);
455 /* Write a message to the given i2c slave. do_stop may be 0 to prevent
456 issuing the i2c stop condition (when following with a read) */
457 static int ivtv_write(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len, int do_stop)
459 int retry, ret = -EREMOTEIO;
462 for (retry = 0; ret != 0 && retry < 8; ++retry) {
463 ret = ivtv_start(itv);
466 ret = ivtv_sendbyte(itv, addr<<1);
467 for (i = 0; ret == 0 && i < len; ++i)
468 ret = ivtv_sendbyte(itv, data[i]);
470 if (ret != 0 || do_stop) {
475 IVTV_DEBUG_I2C("i2c write to %x failed\n", addr);
479 /* Read data from the given i2c slave. A stop condition is always issued. */
480 static int ivtv_read(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len)
482 int retry, ret = -EREMOTEIO;
485 for (retry = 0; ret != 0 && retry < 8; ++retry) {
486 ret = ivtv_start(itv);
488 ret = ivtv_sendbyte(itv, (addr << 1) | 1);
489 for (i = 0; ret == 0 && i < len; ++i) {
490 ret = ivtv_readbyte(itv, &data[i], i == len - 1);
495 IVTV_DEBUG_I2C("i2c read from %x failed\n", addr);
499 /* Kernel i2c transfer implementation. Takes a number of messages to be read
500 or written. If a read follows a write, this will occur without an
501 intervening stop condition */
502 static int ivtv_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
504 struct ivtv *itv = i2c_get_adapdata(i2c_adap);
508 mutex_lock(&itv->i2c_bus_lock);
509 for (i = retval = 0; retval == 0 && i < num; i++) {
510 if (msgs[i].flags & I2C_M_RD)
511 retval = ivtv_read(itv, msgs[i].addr, msgs[i].buf, msgs[i].len);
513 /* if followed by a read, don't stop */
514 int stop = !(i + 1 < num && msgs[i + 1].flags == I2C_M_RD);
516 retval = ivtv_write(itv, msgs[i].addr, msgs[i].buf, msgs[i].len, stop);
519 mutex_unlock(&itv->i2c_bus_lock);
520 return retval ? retval : num;
523 /* Kernel i2c capabilities */
524 static u32 ivtv_functionality(struct i2c_adapter *adap)
526 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
529 static struct i2c_algorithm ivtv_algo = {
530 .master_xfer = ivtv_xfer,
531 .functionality = ivtv_functionality,
534 /* template for our-bit banger */
535 static struct i2c_adapter ivtv_i2c_adap_hw_template = {
536 .name = "ivtv i2c driver",
537 .id = I2C_HW_B_CX2341X,
539 .algo_data = NULL, /* filled from template */
540 .client_register = attach_inform,
541 .client_unregister = detach_inform,
542 .owner = THIS_MODULE,
545 static void ivtv_setscl_old(void *data, int state)
547 struct ivtv *itv = (struct ivtv *)data;
550 itv->i2c_state |= 0x01;
552 itv->i2c_state &= ~0x01;
555 /* write bits are inverted */
556 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET);
559 static void ivtv_setsda_old(void *data, int state)
561 struct ivtv *itv = (struct ivtv *)data;
564 itv->i2c_state |= 0x01;
566 itv->i2c_state &= ~0x01;
569 /* write bits are inverted */
570 write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET);
573 static int ivtv_getscl_old(void *data)
575 struct ivtv *itv = (struct ivtv *)data;
577 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1;
580 static int ivtv_getsda_old(void *data)
582 struct ivtv *itv = (struct ivtv *)data;
584 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1;
587 /* template for i2c-bit-algo */
588 static struct i2c_adapter ivtv_i2c_adap_template = {
589 .name = "ivtv i2c driver",
590 .id = I2C_HW_B_CX2341X,
591 .algo = NULL, /* set by i2c-algo-bit */
592 .algo_data = NULL, /* filled from template */
593 .client_register = attach_inform,
594 .client_unregister = detach_inform,
595 .owner = THIS_MODULE,
598 static const struct i2c_algo_bit_data ivtv_i2c_algo_template = {
599 .setsda = ivtv_setsda_old,
600 .setscl = ivtv_setscl_old,
601 .getsda = ivtv_getsda_old,
602 .getscl = ivtv_getscl_old,
607 static struct i2c_client ivtv_i2c_client_template = {
608 .name = "ivtv internal",
611 int ivtv_call_i2c_client(struct ivtv *itv, int addr, unsigned int cmd, void *arg)
613 struct i2c_client *client;
617 IVTV_DEBUG_I2C("call_i2c_client addr=%02x\n", addr);
618 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
619 client = itv->i2c_clients[i];
620 if (client == NULL || client->driver == NULL ||
621 client->driver->command == NULL)
623 if (addr == client->addr) {
624 retval = client->driver->command(client, cmd, arg);
628 if (cmd != VIDIOC_G_CHIP_IDENT)
629 IVTV_ERR("i2c addr 0x%02x not found for command 0x%x\n", addr, cmd);
633 /* Find the i2c device based on the driver ID and return
634 its i2c address or -ENODEV if no matching device was found. */
635 static int ivtv_i2c_id_addr(struct ivtv *itv, u32 id)
637 struct i2c_client *client;
638 int retval = -ENODEV;
641 for (i = 0; i < I2C_CLIENTS_MAX; i++) {
642 client = itv->i2c_clients[i];
643 if (client == NULL || client->driver == NULL)
645 if (id == client->driver->id) {
646 retval = client->addr;
653 /* Find the i2c device name matching the DRIVERID */
654 static const char *ivtv_i2c_id_name(u32 id)
658 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
659 if (hw_driverids[i] == id)
660 return hw_drivernames[i];
661 return "unknown device";
664 /* Find the i2c device name matching the IVTV_HW_ flag */
665 static const char *ivtv_i2c_hw_name(u32 hw)
669 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
671 return hw_drivernames[i];
672 return "unknown device";
675 /* Find the i2c device matching the IVTV_HW_ flag and return
676 its i2c address or -ENODEV if no matching device was found. */
677 int ivtv_i2c_hw_addr(struct ivtv *itv, u32 hw)
681 for (i = 0; i < ARRAY_SIZE(hw_driverids); i++)
683 return ivtv_i2c_id_addr(itv, hw_driverids[i]);
687 /* Calls i2c device based on IVTV_HW_ flag. If hw == 0, then do nothing.
688 If hw == IVTV_HW_GPIO then call the gpio handler. */
689 int ivtv_i2c_hw(struct ivtv *itv, u32 hw, unsigned int cmd, void *arg)
693 if (hw == IVTV_HW_GPIO)
694 return ivtv_gpio(itv, cmd, arg);
698 addr = ivtv_i2c_hw_addr(itv, hw);
700 IVTV_ERR("i2c hardware 0x%08x (%s) not found for command 0x%x\n",
701 hw, ivtv_i2c_hw_name(hw), cmd);
704 return ivtv_call_i2c_client(itv, addr, cmd, arg);
707 /* Calls i2c device based on I2C driver ID. */
708 int ivtv_i2c_id(struct ivtv *itv, u32 id, unsigned int cmd, void *arg)
712 addr = ivtv_i2c_id_addr(itv, id);
714 if (cmd != VIDIOC_G_CHIP_IDENT)
715 IVTV_ERR("i2c ID 0x%08x (%s) not found for command 0x%x\n",
716 id, ivtv_i2c_id_name(id), cmd);
719 return ivtv_call_i2c_client(itv, addr, cmd, arg);
722 int ivtv_cx25840(struct ivtv *itv, unsigned int cmd, void *arg)
724 return ivtv_call_i2c_client(itv, IVTV_CX25840_I2C_ADDR, cmd, arg);
727 int ivtv_saa7115(struct ivtv *itv, unsigned int cmd, void *arg)
729 return ivtv_call_i2c_client(itv, IVTV_SAA7115_I2C_ADDR, cmd, arg);
732 int ivtv_saa7127(struct ivtv *itv, unsigned int cmd, void *arg)
734 return ivtv_call_i2c_client(itv, IVTV_SAA7127_I2C_ADDR, cmd, arg);
737 int ivtv_saa717x(struct ivtv *itv, unsigned int cmd, void *arg)
739 return ivtv_call_i2c_client(itv, IVTV_SAA717x_I2C_ADDR, cmd, arg);
742 int ivtv_upd64031a(struct ivtv *itv, unsigned int cmd, void *arg)
744 return ivtv_call_i2c_client(itv, IVTV_UPD64031A_I2C_ADDR, cmd, arg);
747 int ivtv_upd64083(struct ivtv *itv, unsigned int cmd, void *arg)
749 return ivtv_call_i2c_client(itv, IVTV_UPD64083_I2C_ADDR, cmd, arg);
752 /* broadcast cmd for all I2C clients and for the gpio subsystem */
753 void ivtv_call_i2c_clients(struct ivtv *itv, unsigned int cmd, void *arg)
755 if (itv->i2c_adap.algo == NULL) {
756 IVTV_ERR("Adapter is not set");
759 i2c_clients_command(&itv->i2c_adap, cmd, arg);
760 if (itv->hw_flags & IVTV_HW_GPIO)
761 ivtv_gpio(itv, cmd, arg);
764 /* init + register i2c algo-bit adapter */
765 int init_ivtv_i2c(struct ivtv *itv)
767 IVTV_DEBUG_I2C("i2c init\n");
769 /* Sanity checks for the I2C hardware arrays. They must be the
770 * same size and GPIO must be the last entry.
772 if (ARRAY_SIZE(hw_driverids) != ARRAY_SIZE(hw_addrs) ||
773 ARRAY_SIZE(hw_drivernames) != ARRAY_SIZE(hw_addrs) ||
774 IVTV_HW_GPIO != (1 << (ARRAY_SIZE(hw_addrs) - 1)) ||
775 hw_driverids[ARRAY_SIZE(hw_addrs) - 1]) {
776 IVTV_ERR("Mismatched I2C hardware arrays\n");
779 if (itv->options.newi2c > 0) {
780 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_hw_template,
781 sizeof(struct i2c_adapter));
783 memcpy(&itv->i2c_adap, &ivtv_i2c_adap_template,
784 sizeof(struct i2c_adapter));
785 memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template,
786 sizeof(struct i2c_algo_bit_data));
788 itv->i2c_algo.data = itv;
789 itv->i2c_adap.algo_data = &itv->i2c_algo;
791 sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d",
793 i2c_set_adapdata(&itv->i2c_adap, itv);
795 memcpy(&itv->i2c_client, &ivtv_i2c_client_template,
796 sizeof(struct i2c_client));
797 itv->i2c_client.adapter = &itv->i2c_adap;
798 itv->i2c_adap.dev.parent = &itv->dev->dev;
800 IVTV_DEBUG_I2C("setting scl and sda to 1\n");
804 if (itv->options.newi2c > 0)
805 return i2c_add_adapter(&itv->i2c_adap);
807 return i2c_bit_add_bus(&itv->i2c_adap);
810 void exit_ivtv_i2c(struct ivtv *itv)
812 IVTV_DEBUG_I2C("i2c exit\n");
814 i2c_del_adapter(&itv->i2c_adap);