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
97 #define IVTV_ADAPTEC_IR_ADDR 0x6b
99 /* This array should match the IVTV_HW_ defines */
100 static const u8 hw_addrs
[] = {
101 IVTV_CX25840_I2C_ADDR
,
102 IVTV_SAA7115_I2C_ADDR
,
103 IVTV_SAA7127_I2C_ADDR
,
104 IVTV_MSP3400_I2C_ADDR
,
106 IVTV_WM8775_I2C_ADDR
,
107 IVTV_CS53L32A_I2C_ADDR
,
109 IVTV_SAA7115_I2C_ADDR
,
110 IVTV_UPD64031A_I2C_ADDR
,
111 IVTV_UPD64083_I2C_ADDR
,
112 IVTV_SAA717x_I2C_ADDR
,
113 IVTV_WM8739_I2C_ADDR
,
114 IVTV_VP27SMPX_I2C_ADDR
,
115 IVTV_M52790_I2C_ADDR
,
116 0, /* IVTV_HW_GPIO dummy driver ID */
117 IVTV_AVERMEDIA_IR_RX_I2C_ADDR
, /* IVTV_HW_I2C_IR_RX_AVER */
118 IVTV_HAUP_EXT_IR_RX_I2C_ADDR
, /* IVTV_HW_I2C_IR_RX_HAUP_EXT */
119 IVTV_HAUP_INT_IR_RX_I2C_ADDR
, /* IVTV_HW_I2C_IR_RX_HAUP_INT */
120 IVTV_Z8F0811_IR_TX_I2C_ADDR
, /* IVTV_HW_Z8F0811_IR_TX_HAUP */
121 IVTV_Z8F0811_IR_RX_I2C_ADDR
, /* IVTV_HW_Z8F0811_IR_RX_HAUP */
122 IVTV_ADAPTEC_IR_ADDR
, /* IVTV_HW_I2C_IR_RX_ADAPTEC */
125 /* This array should match the IVTV_HW_ defines */
126 static const char * const hw_devicenames
[] = {
129 "saa7127_auto", /* saa7127 or saa7129 */
143 "ir_video", /* IVTV_HW_I2C_IR_RX_AVER */
144 "ir_video", /* IVTV_HW_I2C_IR_RX_HAUP_EXT */
145 "ir_video", /* IVTV_HW_I2C_IR_RX_HAUP_INT */
146 "ir_tx_z8f0811_haup", /* IVTV_HW_Z8F0811_IR_TX_HAUP */
147 "ir_rx_z8f0811_haup", /* IVTV_HW_Z8F0811_IR_RX_HAUP */
148 "ir_video", /* IVTV_HW_I2C_IR_RX_ADAPTEC */
151 static int get_key_adaptec(struct IR_i2c
*ir
, enum rc_type
*protocol
,
152 u32
*scancode
, u8
*toggle
)
154 unsigned char keybuf
[4];
157 i2c_master_send(ir
->c
, keybuf
, 1);
159 if (i2c_master_recv(ir
->c
, keybuf
, sizeof(keybuf
)) != sizeof(keybuf
)) {
164 if (keybuf
[2] == 0xff)
167 /* remove repeat bit */
171 *protocol
= RC_TYPE_UNKNOWN
;
172 *scancode
= keybuf
[3] | keybuf
[2] << 8 | keybuf
[1] << 16 |keybuf
[0] << 24;
177 static int ivtv_i2c_new_ir(struct ivtv
*itv
, u32 hw
, const char *type
, u8 addr
)
179 struct i2c_board_info info
;
180 struct i2c_adapter
*adap
= &itv
->i2c_adap
;
181 struct IR_i2c_init_data
*init_data
= &itv
->ir_i2c_init_data
;
182 unsigned short addr_list
[2] = { addr
, I2C_CLIENT_END
};
184 /* Only allow one IR transmitter to be registered per board */
185 if (hw
& IVTV_HW_IR_TX_ANY
) {
186 if (itv
->hw_flags
& IVTV_HW_IR_TX_ANY
)
188 memset(&info
, 0, sizeof(struct i2c_board_info
));
189 strlcpy(info
.type
, type
, I2C_NAME_SIZE
);
190 return i2c_new_probed_device(adap
, &info
, addr_list
, NULL
)
194 /* Only allow one IR receiver to be registered per board */
195 if (itv
->hw_flags
& IVTV_HW_IR_RX_ANY
)
198 /* Our default information for ir-kbd-i2c.c to use */
200 case IVTV_HW_I2C_IR_RX_AVER
:
201 init_data
->ir_codes
= RC_MAP_AVERMEDIA_CARDBUS
;
202 init_data
->internal_get_key_func
=
203 IR_KBD_GET_KEY_AVERMEDIA_CARDBUS
;
204 init_data
->type
= RC_BIT_OTHER
;
205 init_data
->name
= "AVerMedia AVerTV card";
207 case IVTV_HW_I2C_IR_RX_HAUP_EXT
:
208 case IVTV_HW_I2C_IR_RX_HAUP_INT
:
209 init_data
->ir_codes
= RC_MAP_HAUPPAUGE
;
210 init_data
->internal_get_key_func
= IR_KBD_GET_KEY_HAUP
;
211 init_data
->type
= RC_BIT_RC5
;
212 init_data
->name
= itv
->card_name
;
214 case IVTV_HW_Z8F0811_IR_RX_HAUP
:
215 /* Default to grey remote */
216 init_data
->ir_codes
= RC_MAP_HAUPPAUGE
;
217 init_data
->internal_get_key_func
= IR_KBD_GET_KEY_HAUP_XVR
;
218 init_data
->type
= RC_BIT_RC5
;
219 init_data
->name
= itv
->card_name
;
221 case IVTV_HW_I2C_IR_RX_ADAPTEC
:
222 init_data
->get_key
= get_key_adaptec
;
223 init_data
->name
= itv
->card_name
;
224 /* FIXME: The protocol and RC_MAP needs to be corrected */
225 init_data
->ir_codes
= RC_MAP_EMPTY
;
226 init_data
->type
= RC_BIT_UNKNOWN
;
230 memset(&info
, 0, sizeof(struct i2c_board_info
));
231 info
.platform_data
= init_data
;
232 strlcpy(info
.type
, type
, I2C_NAME_SIZE
);
234 return i2c_new_probed_device(adap
, &info
, addr_list
, NULL
) == NULL
?
238 /* Instantiate the IR receiver device using probing -- undesirable */
239 struct i2c_client
*ivtv_i2c_new_ir_legacy(struct ivtv
*itv
)
241 struct i2c_board_info info
;
243 * The external IR receiver is at i2c address 0x34.
244 * The internal IR receiver is at i2c address 0x30.
246 * In theory, both can be fitted, and Hauppauge suggests an external
247 * overrides an internal. That's why we probe 0x1a (~0x34) first. CB
249 * Some of these addresses we probe may collide with other i2c address
250 * allocations, so this function must be called after all other i2c
251 * devices we care about are registered.
253 const unsigned short addr_list
[] = {
254 0x1a, /* Hauppauge IR external - collides with WM8739 */
255 0x18, /* Hauppauge IR internal */
259 memset(&info
, 0, sizeof(struct i2c_board_info
));
260 strlcpy(info
.type
, "ir_video", I2C_NAME_SIZE
);
261 return i2c_new_probed_device(&itv
->i2c_adap
, &info
, addr_list
, NULL
);
264 int ivtv_i2c_register(struct ivtv
*itv
, unsigned idx
)
266 struct v4l2_subdev
*sd
;
267 struct i2c_adapter
*adap
= &itv
->i2c_adap
;
268 const char *type
= hw_devicenames
[idx
];
271 if (hw
== IVTV_HW_TUNER
) {
272 /* special tuner handling */
273 sd
= v4l2_i2c_new_subdev(&itv
->v4l2_dev
, adap
, type
, 0,
274 itv
->card_i2c
->radio
);
276 sd
->grp_id
= 1 << idx
;
277 sd
= v4l2_i2c_new_subdev(&itv
->v4l2_dev
, adap
, type
, 0,
278 itv
->card_i2c
->demod
);
280 sd
->grp_id
= 1 << idx
;
281 sd
= v4l2_i2c_new_subdev(&itv
->v4l2_dev
, adap
, type
, 0,
284 sd
->grp_id
= 1 << idx
;
288 if (hw
& IVTV_HW_IR_ANY
)
289 return ivtv_i2c_new_ir(itv
, hw
, type
, hw_addrs
[idx
]);
291 /* Is it not an I2C device or one we do not wish to register? */
295 /* It's an I2C device other than an analog tuner or IR chip */
296 if (hw
== IVTV_HW_UPD64031A
|| hw
== IVTV_HW_UPD6408X
) {
297 sd
= v4l2_i2c_new_subdev(&itv
->v4l2_dev
,
298 adap
, type
, 0, I2C_ADDRS(hw_addrs
[idx
]));
299 } else if (hw
== IVTV_HW_CX25840
) {
300 struct cx25840_platform_data pdata
;
301 struct i2c_board_info cx25840_info
= {
303 .addr
= hw_addrs
[idx
],
304 .platform_data
= &pdata
,
307 pdata
.pvr150_workaround
= itv
->pvr150_workaround
;
308 sd
= v4l2_i2c_new_subdev_board(&itv
->v4l2_dev
, adap
,
309 &cx25840_info
, NULL
);
311 sd
= v4l2_i2c_new_subdev(&itv
->v4l2_dev
,
312 adap
, type
, hw_addrs
[idx
], NULL
);
315 sd
->grp_id
= 1 << idx
;
319 struct v4l2_subdev
*ivtv_find_hw(struct ivtv
*itv
, u32 hw
)
321 struct v4l2_subdev
*result
= NULL
;
322 struct v4l2_subdev
*sd
;
324 spin_lock(&itv
->v4l2_dev
.lock
);
325 v4l2_device_for_each_subdev(sd
, &itv
->v4l2_dev
) {
326 if (sd
->grp_id
== hw
) {
331 spin_unlock(&itv
->v4l2_dev
.lock
);
335 /* Set the serial clock line to the desired state */
336 static void ivtv_setscl(struct ivtv
*itv
, int state
)
339 /* write bits are inverted */
340 write_reg(~state
, IVTV_REG_I2C_SETSCL_OFFSET
);
343 /* Set the serial data line to the desired state */
344 static void ivtv_setsda(struct ivtv
*itv
, int state
)
347 /* write bits are inverted */
348 write_reg(~state
& 1, IVTV_REG_I2C_SETSDA_OFFSET
);
351 /* Read the serial clock line */
352 static int ivtv_getscl(struct ivtv
*itv
)
354 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET
) & 1;
357 /* Read the serial data line */
358 static int ivtv_getsda(struct ivtv
*itv
)
360 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET
) & 1;
363 /* Implement a short delay by polling the serial clock line */
364 static void ivtv_scldelay(struct ivtv
*itv
)
368 for (i
= 0; i
< 5; ++i
)
372 /* Wait for the serial clock line to become set to a specific value */
373 static int ivtv_waitscl(struct ivtv
*itv
, int val
)
378 for (i
= 0; i
< 1000; ++i
) {
379 if (ivtv_getscl(itv
) == val
)
385 /* Wait for the serial data line to become set to a specific value */
386 static int ivtv_waitsda(struct ivtv
*itv
, int val
)
391 for (i
= 0; i
< 1000; ++i
) {
392 if (ivtv_getsda(itv
) == val
)
398 /* Wait for the slave to issue an ACK */
399 static int ivtv_ack(struct ivtv
*itv
)
403 if (ivtv_getscl(itv
) == 1) {
404 IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n");
406 if (!ivtv_waitscl(itv
, 0)) {
407 IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n");
414 if (!ivtv_waitsda(itv
, 0)) {
415 IVTV_DEBUG_I2C("Slave did not ack\n");
419 if (!ivtv_waitscl(itv
, 0)) {
420 IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n");
426 /* Write a single byte to the i2c bus and wait for the slave to ACK */
427 static int ivtv_sendbyte(struct ivtv
*itv
, unsigned char byte
)
431 IVTV_DEBUG_HI_I2C("write %x\n",byte
);
432 for (i
= 0; i
< 8; ++i
, byte
<<=1) {
434 if (!ivtv_waitscl(itv
, 0)) {
435 IVTV_DEBUG_I2C("Error setting SCL low\n");
439 ivtv_setsda(itv
, bit
);
440 if (!ivtv_waitsda(itv
, bit
)) {
441 IVTV_DEBUG_I2C("Error setting SDA\n");
445 if (!ivtv_waitscl(itv
, 1)) {
446 IVTV_DEBUG_I2C("Slave not ready for bit\n");
451 if (!ivtv_waitscl(itv
, 0)) {
452 IVTV_DEBUG_I2C("Error setting SCL low\n");
455 return ivtv_ack(itv
);
458 /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the
460 static int ivtv_readbyte(struct ivtv
*itv
, unsigned char *byte
, int nack
)
468 for (i
= 0; i
< 8; ++i
) {
472 if (!ivtv_waitscl(itv
, 1)) {
473 IVTV_DEBUG_I2C("Error setting SCL high\n");
476 *byte
= ((*byte
)<<1)|ivtv_getsda(itv
);
480 ivtv_setsda(itv
, nack
);
486 IVTV_DEBUG_HI_I2C("read %x\n",*byte
);
490 /* Issue a start condition on the i2c bus to alert slaves to prepare for
492 static int ivtv_start(struct ivtv
*itv
)
496 sda
= ivtv_getsda(itv
);
498 IVTV_DEBUG_HI_I2C("SDA was low at start\n");
500 if (!ivtv_waitsda(itv
, 1)) {
501 IVTV_DEBUG_I2C("SDA stuck low\n");
505 if (ivtv_getscl(itv
) != 1) {
507 if (!ivtv_waitscl(itv
, 1)) {
508 IVTV_DEBUG_I2C("SCL stuck low at start\n");
517 /* Issue a stop condition on the i2c bus to release it */
518 static int ivtv_stop(struct ivtv
*itv
)
522 if (ivtv_getscl(itv
) != 0) {
523 IVTV_DEBUG_HI_I2C("SCL not low when stopping\n");
525 if (!ivtv_waitscl(itv
, 0)) {
526 IVTV_DEBUG_I2C("SCL could not be set low\n");
532 if (!ivtv_waitscl(itv
, 1)) {
533 IVTV_DEBUG_I2C("SCL could not be set high\n");
538 if (!ivtv_waitsda(itv
, 1)) {
539 IVTV_DEBUG_I2C("resetting I2C\n");
540 for (i
= 0; i
< 16; ++i
) {
547 ivtv_waitsda(itv
, 1);
553 /* Write a message to the given i2c slave. do_stop may be 0 to prevent
554 issuing the i2c stop condition (when following with a read) */
555 static int ivtv_write(struct ivtv
*itv
, unsigned char addr
, unsigned char *data
, u32 len
, int do_stop
)
557 int retry
, ret
= -EREMOTEIO
;
560 for (retry
= 0; ret
!= 0 && retry
< 8; ++retry
) {
561 ret
= ivtv_start(itv
);
564 ret
= ivtv_sendbyte(itv
, addr
<<1);
565 for (i
= 0; ret
== 0 && i
< len
; ++i
)
566 ret
= ivtv_sendbyte(itv
, data
[i
]);
568 if (ret
!= 0 || do_stop
) {
573 IVTV_DEBUG_I2C("i2c write to %x failed\n", addr
);
577 /* Read data from the given i2c slave. A stop condition is always issued. */
578 static int ivtv_read(struct ivtv
*itv
, unsigned char addr
, unsigned char *data
, u32 len
)
580 int retry
, ret
= -EREMOTEIO
;
583 for (retry
= 0; ret
!= 0 && retry
< 8; ++retry
) {
584 ret
= ivtv_start(itv
);
586 ret
= ivtv_sendbyte(itv
, (addr
<< 1) | 1);
587 for (i
= 0; ret
== 0 && i
< len
; ++i
) {
588 ret
= ivtv_readbyte(itv
, &data
[i
], i
== len
- 1);
593 IVTV_DEBUG_I2C("i2c read from %x failed\n", addr
);
597 /* Kernel i2c transfer implementation. Takes a number of messages to be read
598 or written. If a read follows a write, this will occur without an
599 intervening stop condition */
600 static int ivtv_xfer(struct i2c_adapter
*i2c_adap
, struct i2c_msg
*msgs
, int num
)
602 struct v4l2_device
*v4l2_dev
= i2c_get_adapdata(i2c_adap
);
603 struct ivtv
*itv
= to_ivtv(v4l2_dev
);
607 mutex_lock(&itv
->i2c_bus_lock
);
608 for (i
= retval
= 0; retval
== 0 && i
< num
; i
++) {
609 if (msgs
[i
].flags
& I2C_M_RD
)
610 retval
= ivtv_read(itv
, msgs
[i
].addr
, msgs
[i
].buf
, msgs
[i
].len
);
612 /* if followed by a read, don't stop */
613 int stop
= !(i
+ 1 < num
&& msgs
[i
+ 1].flags
== I2C_M_RD
);
615 retval
= ivtv_write(itv
, msgs
[i
].addr
, msgs
[i
].buf
, msgs
[i
].len
, stop
);
618 mutex_unlock(&itv
->i2c_bus_lock
);
619 return retval
? retval
: num
;
622 /* Kernel i2c capabilities */
623 static u32
ivtv_functionality(struct i2c_adapter
*adap
)
625 return I2C_FUNC_I2C
| I2C_FUNC_SMBUS_EMUL
;
628 static struct i2c_algorithm ivtv_algo
= {
629 .master_xfer
= ivtv_xfer
,
630 .functionality
= ivtv_functionality
,
633 /* template for our-bit banger */
634 static struct i2c_adapter ivtv_i2c_adap_hw_template
= {
635 .name
= "ivtv i2c driver",
637 .algo_data
= NULL
, /* filled from template */
638 .owner
= THIS_MODULE
,
641 static void ivtv_setscl_old(void *data
, int state
)
643 struct ivtv
*itv
= (struct ivtv
*)data
;
646 itv
->i2c_state
|= 0x01;
648 itv
->i2c_state
&= ~0x01;
651 /* write bits are inverted */
652 write_reg(~itv
->i2c_state
, IVTV_REG_I2C_SETSCL_OFFSET
);
655 static void ivtv_setsda_old(void *data
, int state
)
657 struct ivtv
*itv
= (struct ivtv
*)data
;
660 itv
->i2c_state
|= 0x01;
662 itv
->i2c_state
&= ~0x01;
665 /* write bits are inverted */
666 write_reg(~itv
->i2c_state
, IVTV_REG_I2C_SETSDA_OFFSET
);
669 static int ivtv_getscl_old(void *data
)
671 struct ivtv
*itv
= (struct ivtv
*)data
;
673 return read_reg(IVTV_REG_I2C_GETSCL_OFFSET
) & 1;
676 static int ivtv_getsda_old(void *data
)
678 struct ivtv
*itv
= (struct ivtv
*)data
;
680 return read_reg(IVTV_REG_I2C_GETSDA_OFFSET
) & 1;
683 /* template for i2c-bit-algo */
684 static struct i2c_adapter ivtv_i2c_adap_template
= {
685 .name
= "ivtv i2c driver",
686 .algo
= NULL
, /* set by i2c-algo-bit */
687 .algo_data
= NULL
, /* filled from template */
688 .owner
= THIS_MODULE
,
691 #define IVTV_ALGO_BIT_TIMEOUT (2) /* seconds */
693 static const struct i2c_algo_bit_data ivtv_i2c_algo_template
= {
694 .setsda
= ivtv_setsda_old
,
695 .setscl
= ivtv_setscl_old
,
696 .getsda
= ivtv_getsda_old
,
697 .getscl
= ivtv_getscl_old
,
698 .udelay
= IVTV_DEFAULT_I2C_CLOCK_PERIOD
/ 2, /* microseconds */
699 .timeout
= IVTV_ALGO_BIT_TIMEOUT
* HZ
, /* jiffies */
702 static struct i2c_client ivtv_i2c_client_template
= {
703 .name
= "ivtv internal",
706 /* init + register i2c adapter */
707 int init_ivtv_i2c(struct ivtv
*itv
)
711 IVTV_DEBUG_I2C("i2c init\n");
713 /* Sanity checks for the I2C hardware arrays. They must be the
716 if (ARRAY_SIZE(hw_devicenames
) != ARRAY_SIZE(hw_addrs
)) {
717 IVTV_ERR("Mismatched I2C hardware arrays\n");
720 if (itv
->options
.newi2c
> 0) {
721 itv
->i2c_adap
= ivtv_i2c_adap_hw_template
;
723 itv
->i2c_adap
= ivtv_i2c_adap_template
;
724 itv
->i2c_algo
= ivtv_i2c_algo_template
;
726 itv
->i2c_algo
.udelay
= itv
->options
.i2c_clock_period
/ 2;
727 itv
->i2c_algo
.data
= itv
;
728 itv
->i2c_adap
.algo_data
= &itv
->i2c_algo
;
730 sprintf(itv
->i2c_adap
.name
+ strlen(itv
->i2c_adap
.name
), " #%d",
732 i2c_set_adapdata(&itv
->i2c_adap
, &itv
->v4l2_dev
);
734 itv
->i2c_client
= ivtv_i2c_client_template
;
735 itv
->i2c_client
.adapter
= &itv
->i2c_adap
;
736 itv
->i2c_adap
.dev
.parent
= &itv
->pdev
->dev
;
738 IVTV_DEBUG_I2C("setting scl and sda to 1\n");
742 if (itv
->options
.newi2c
> 0)
743 retval
= i2c_add_adapter(&itv
->i2c_adap
);
745 retval
= i2c_bit_add_bus(&itv
->i2c_adap
);
750 void exit_ivtv_i2c(struct ivtv
*itv
)
752 IVTV_DEBUG_I2C("i2c exit\n");
754 i2c_del_adapter(&itv
->i2c_adap
);