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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / media / video / saa7164 / saa7164-cards.c
bloba3c299405f46c28f9fffaeb5996b002f74440292
1 /*
2 * Driver for the NXP SAA7164 PCIe bridge
3 *
4 * Copyright (c) 2009 Steven Toth <stoth@kernellabs.com>
5 *
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.
10 *
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 *
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/pci.h>
25 #include <linux/delay.h>
26
27 #include "saa7164.h"
28
29 /* The Bridge API needs to understand register widths (in bytes) for the
30 * attached I2C devices, so we can simplify the virtual i2c mechansms
31 * and keep the -i2c.c implementation clean.
32 */
33 #define REGLEN_8bit 1
34 #define REGLEN_16bit 2
35
36 struct saa7164_board saa7164_boards[] = {
37 [SAA7164_BOARD_UNKNOWN] = {
38 /* Bridge will not load any firmware, without knowing
39 * the rev this would be fatal. */
40 .name = "Unknown",
41 },
42 [SAA7164_BOARD_UNKNOWN_REV2] = {
43 /* Bridge will load the v2 f/w and dump descriptors */
44 /* Required during new board bringup */
45 .name = "Generic Rev2",
46 .chiprev = SAA7164_CHIP_REV2,
47 },
48 [SAA7164_BOARD_UNKNOWN_REV3] = {
49 /* Bridge will load the v2 f/w and dump descriptors */
50 /* Required during new board bringup */
51 .name = "Generic Rev3",
52 .chiprev = SAA7164_CHIP_REV3,
53 },
54 [SAA7164_BOARD_HAUPPAUGE_HVR2200] = {
55 .name = "Hauppauge WinTV-HVR2200",
56 .porta = SAA7164_MPEG_DVB,
57 .portb = SAA7164_MPEG_DVB,
58 .chiprev = SAA7164_CHIP_REV3,
59 .unit = {{
60 .id = 0x1d,
61 .type = SAA7164_UNIT_EEPROM,
62 .name = "4K EEPROM",
63 .i2c_bus_nr = SAA7164_I2C_BUS_0,
64 .i2c_bus_addr = 0xa0 >> 1,
65 .i2c_reg_len = REGLEN_8bit,
66 }, {
67 .id = 0x04,
68 .type = SAA7164_UNIT_TUNER,
69 .name = "TDA18271-1",
70 .i2c_bus_nr = SAA7164_I2C_BUS_1,
71 .i2c_bus_addr = 0xc0 >> 1,
72 .i2c_reg_len = REGLEN_8bit,
73 }, {
74 .id = 0x1b,
75 .type = SAA7164_UNIT_TUNER,
76 .name = "TDA18271-2",
77 .i2c_bus_nr = SAA7164_I2C_BUS_2,
78 .i2c_bus_addr = 0xc0 >> 1,
79 .i2c_reg_len = REGLEN_8bit,
80 }, {
81 .id = 0x1e,
82 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
83 .name = "TDA10048-1",
84 .i2c_bus_nr = SAA7164_I2C_BUS_1,
85 .i2c_bus_addr = 0x10 >> 1,
86 .i2c_reg_len = REGLEN_8bit,
87 }, {
88 .id = 0x1f,
89 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
90 .name = "TDA10048-2",
91 .i2c_bus_nr = SAA7164_I2C_BUS_2,
92 .i2c_bus_addr = 0x12 >> 1,
93 .i2c_reg_len = REGLEN_8bit,
94 } },
95 },
96 [SAA7164_BOARD_HAUPPAUGE_HVR2200_2] = {
97 .name = "Hauppauge WinTV-HVR2200",
98 .porta = SAA7164_MPEG_DVB,
99 .portb = SAA7164_MPEG_DVB,
100 .chiprev = SAA7164_CHIP_REV2,
101 .unit = {{
102 .id = 0x06,
103 .type = SAA7164_UNIT_EEPROM,
104 .name = "4K EEPROM",
105 .i2c_bus_nr = SAA7164_I2C_BUS_0,
106 .i2c_bus_addr = 0xa0 >> 1,
107 .i2c_reg_len = REGLEN_8bit,
108 }, {
109 .id = 0x04,
110 .type = SAA7164_UNIT_TUNER,
111 .name = "TDA18271-1",
112 .i2c_bus_nr = SAA7164_I2C_BUS_1,
113 .i2c_bus_addr = 0xc0 >> 1,
114 .i2c_reg_len = REGLEN_8bit,
115 }, {
116 .id = 0x05,
117 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
118 .name = "TDA10048-1",
119 .i2c_bus_nr = SAA7164_I2C_BUS_1,
120 .i2c_bus_addr = 0x10 >> 1,
121 .i2c_reg_len = REGLEN_8bit,
122 }, {
123 .id = 0x1e,
124 .type = SAA7164_UNIT_TUNER,
125 .name = "TDA18271-2",
126 .i2c_bus_nr = SAA7164_I2C_BUS_2,
127 .i2c_bus_addr = 0xc0 >> 1,
128 .i2c_reg_len = REGLEN_8bit,
129 }, {
130 .id = 0x1f,
131 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
132 .name = "TDA10048-2",
133 .i2c_bus_nr = SAA7164_I2C_BUS_2,
134 .i2c_bus_addr = 0x12 >> 1,
135 .i2c_reg_len = REGLEN_8bit,
136 } },
137 },
138 [SAA7164_BOARD_HAUPPAUGE_HVR2200_3] = {
139 .name = "Hauppauge WinTV-HVR2200",
140 .porta = SAA7164_MPEG_DVB,
141 .portb = SAA7164_MPEG_DVB,
142 .chiprev = SAA7164_CHIP_REV2,
143 .unit = {{
144 .id = 0x1d,
145 .type = SAA7164_UNIT_EEPROM,
146 .name = "4K EEPROM",
147 .i2c_bus_nr = SAA7164_I2C_BUS_0,
148 .i2c_bus_addr = 0xa0 >> 1,
149 .i2c_reg_len = REGLEN_8bit,
150 }, {
151 .id = 0x04,
152 .type = SAA7164_UNIT_TUNER,
153 .name = "TDA18271-1",
154 .i2c_bus_nr = SAA7164_I2C_BUS_1,
155 .i2c_bus_addr = 0xc0 >> 1,
156 .i2c_reg_len = REGLEN_8bit,
157 }, {
158 .id = 0x05,
159 .type = SAA7164_UNIT_ANALOG_DEMODULATOR,
160 .name = "TDA8290-1",
161 .i2c_bus_nr = SAA7164_I2C_BUS_1,
162 .i2c_bus_addr = 0x84 >> 1,
163 .i2c_reg_len = REGLEN_8bit,
164 }, {
165 .id = 0x1b,
166 .type = SAA7164_UNIT_TUNER,
167 .name = "TDA18271-2",
168 .i2c_bus_nr = SAA7164_I2C_BUS_2,
169 .i2c_bus_addr = 0xc0 >> 1,
170 .i2c_reg_len = REGLEN_8bit,
171 }, {
172 .id = 0x1c,
173 .type = SAA7164_UNIT_ANALOG_DEMODULATOR,
174 .name = "TDA8290-2",
175 .i2c_bus_nr = SAA7164_I2C_BUS_2,
176 .i2c_bus_addr = 0x84 >> 1,
177 .i2c_reg_len = REGLEN_8bit,
178 }, {
179 .id = 0x1e,
180 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
181 .name = "TDA10048-1",
182 .i2c_bus_nr = SAA7164_I2C_BUS_1,
183 .i2c_bus_addr = 0x10 >> 1,
184 .i2c_reg_len = REGLEN_8bit,
185 }, {
186 .id = 0x1f,
187 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
188 .name = "TDA10048-2",
189 .i2c_bus_nr = SAA7164_I2C_BUS_2,
190 .i2c_bus_addr = 0x12 >> 1,
191 .i2c_reg_len = REGLEN_8bit,
192 } },
193 },
194 [SAA7164_BOARD_HAUPPAUGE_HVR2250] = {
195 .name = "Hauppauge WinTV-HVR2250",
196 .porta = SAA7164_MPEG_DVB,
197 .portb = SAA7164_MPEG_DVB,
198 .chiprev = SAA7164_CHIP_REV3,
199 .unit = {{
200 .id = 0x22,
201 .type = SAA7164_UNIT_EEPROM,
202 .name = "4K EEPROM",
203 .i2c_bus_nr = SAA7164_I2C_BUS_0,
204 .i2c_bus_addr = 0xa0 >> 1,
205 .i2c_reg_len = REGLEN_8bit,
206 }, {
207 .id = 0x04,
208 .type = SAA7164_UNIT_TUNER,
209 .name = "TDA18271-1",
210 .i2c_bus_nr = SAA7164_I2C_BUS_1,
211 .i2c_bus_addr = 0xc0 >> 1,
212 .i2c_reg_len = REGLEN_8bit,
213 }, {
214 .id = 0x07,
215 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
216 .name = "CX24228/S5H1411-1 (TOP)",
217 .i2c_bus_nr = SAA7164_I2C_BUS_1,
218 .i2c_bus_addr = 0x32 >> 1,
219 .i2c_reg_len = REGLEN_8bit,
220 }, {
221 .id = 0x08,
222 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
223 .name = "CX24228/S5H1411-1 (QAM)",
224 .i2c_bus_nr = SAA7164_I2C_BUS_1,
225 .i2c_bus_addr = 0x34 >> 1,
226 .i2c_reg_len = REGLEN_8bit,
227 }, {
228 .id = 0x1e,
229 .type = SAA7164_UNIT_TUNER,
230 .name = "TDA18271-2",
231 .i2c_bus_nr = SAA7164_I2C_BUS_2,
232 .i2c_bus_addr = 0xc0 >> 1,
233 .i2c_reg_len = REGLEN_8bit,
234 }, {
235 .id = 0x20,
236 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
237 .name = "CX24228/S5H1411-2 (TOP)",
238 .i2c_bus_nr = SAA7164_I2C_BUS_2,
239 .i2c_bus_addr = 0x32 >> 1,
240 .i2c_reg_len = REGLEN_8bit,
241 }, {
242 .id = 0x23,
243 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
244 .name = "CX24228/S5H1411-2 (QAM)",
245 .i2c_bus_nr = SAA7164_I2C_BUS_2,
246 .i2c_bus_addr = 0x34 >> 1,
247 .i2c_reg_len = REGLEN_8bit,
248 } },
249 },
250 [SAA7164_BOARD_HAUPPAUGE_HVR2250_2] = {
251 .name = "Hauppauge WinTV-HVR2250",
252 .porta = SAA7164_MPEG_DVB,
253 .portb = SAA7164_MPEG_DVB,
254 .chiprev = SAA7164_CHIP_REV3,
255 .unit = {{
256 .id = 0x28,
257 .type = SAA7164_UNIT_EEPROM,
258 .name = "4K EEPROM",
259 .i2c_bus_nr = SAA7164_I2C_BUS_0,
260 .i2c_bus_addr = 0xa0 >> 1,
261 .i2c_reg_len = REGLEN_8bit,
262 }, {
263 .id = 0x04,
264 .type = SAA7164_UNIT_TUNER,
265 .name = "TDA18271-1",
266 .i2c_bus_nr = SAA7164_I2C_BUS_1,
267 .i2c_bus_addr = 0xc0 >> 1,
268 .i2c_reg_len = REGLEN_8bit,
269 }, {
270 .id = 0x07,
271 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
272 .name = "CX24228/S5H1411-1 (TOP)",
273 .i2c_bus_nr = SAA7164_I2C_BUS_1,
274 .i2c_bus_addr = 0x32 >> 1,
275 .i2c_reg_len = REGLEN_8bit,
276 }, {
277 .id = 0x08,
278 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
279 .name = "CX24228/S5H1411-1 (QAM)",
280 .i2c_bus_nr = SAA7164_I2C_BUS_1,
281 .i2c_bus_addr = 0x34 >> 1,
282 .i2c_reg_len = REGLEN_8bit,
283 }, {
284 .id = 0x24,
285 .type = SAA7164_UNIT_TUNER,
286 .name = "TDA18271-2",
287 .i2c_bus_nr = SAA7164_I2C_BUS_2,
288 .i2c_bus_addr = 0xc0 >> 1,
289 .i2c_reg_len = REGLEN_8bit,
290 }, {
291 .id = 0x26,
292 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
293 .name = "CX24228/S5H1411-2 (TOP)",
294 .i2c_bus_nr = SAA7164_I2C_BUS_2,
295 .i2c_bus_addr = 0x32 >> 1,
296 .i2c_reg_len = REGLEN_8bit,
297 }, {
298 .id = 0x29,
299 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
300 .name = "CX24228/S5H1411-2 (QAM)",
301 .i2c_bus_nr = SAA7164_I2C_BUS_2,
302 .i2c_bus_addr = 0x34 >> 1,
303 .i2c_reg_len = REGLEN_8bit,
304 } },
305 },
306 [SAA7164_BOARD_HAUPPAUGE_HVR2250_3] = {
307 .name = "Hauppauge WinTV-HVR2250",
308 .porta = SAA7164_MPEG_DVB,
309 .portb = SAA7164_MPEG_DVB,
310 .chiprev = SAA7164_CHIP_REV3,
311 .unit = {{
312 .id = 0x26,
313 .type = SAA7164_UNIT_EEPROM,
314 .name = "4K EEPROM",
315 .i2c_bus_nr = SAA7164_I2C_BUS_0,
316 .i2c_bus_addr = 0xa0 >> 1,
317 .i2c_reg_len = REGLEN_8bit,
318 }, {
319 .id = 0x04,
320 .type = SAA7164_UNIT_TUNER,
321 .name = "TDA18271-1",
322 .i2c_bus_nr = SAA7164_I2C_BUS_1,
323 .i2c_bus_addr = 0xc0 >> 1,
324 .i2c_reg_len = REGLEN_8bit,
325 }, {
326 .id = 0x07,
327 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
328 .name = "CX24228/S5H1411-1 (TOP)",
329 .i2c_bus_nr = SAA7164_I2C_BUS_1,
330 .i2c_bus_addr = 0x32 >> 1,
331 .i2c_reg_len = REGLEN_8bit,
332 }, {
333 .id = 0x08,
334 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
335 .name = "CX24228/S5H1411-1 (QAM)",
336 .i2c_bus_nr = SAA7164_I2C_BUS_1,
337 .i2c_bus_addr = 0x34 >> 1,
338 .i2c_reg_len = REGLEN_8bit,
339 }, {
340 .id = 0x22,
341 .type = SAA7164_UNIT_TUNER,
342 .name = "TDA18271-2",
343 .i2c_bus_nr = SAA7164_I2C_BUS_2,
344 .i2c_bus_addr = 0xc0 >> 1,
345 .i2c_reg_len = REGLEN_8bit,
346 }, {
347 .id = 0x24,
348 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
349 .name = "CX24228/S5H1411-2 (TOP)",
350 .i2c_bus_nr = SAA7164_I2C_BUS_2,
351 .i2c_bus_addr = 0x32 >> 1,
352 .i2c_reg_len = REGLEN_8bit,
353 }, {
354 .id = 0x27,
355 .type = SAA7164_UNIT_DIGITAL_DEMODULATOR,
356 .name = "CX24228/S5H1411-2 (QAM)",
357 .i2c_bus_nr = SAA7164_I2C_BUS_2,
358 .i2c_bus_addr = 0x34 >> 1,
359 .i2c_reg_len = REGLEN_8bit,
360 } },
361 },
362 };
363 const unsigned int saa7164_bcount = ARRAY_SIZE(saa7164_boards);
364
365 /* ------------------------------------------------------------------ */
366 /* PCI subsystem IDs */
367
368 struct saa7164_subid saa7164_subids[] = {
369 {
370 .subvendor = 0x0070,
371 .subdevice = 0x8880,
372 .card = SAA7164_BOARD_HAUPPAUGE_HVR2250,
373 }, {
374 .subvendor = 0x0070,
375 .subdevice = 0x8810,
376 .card = SAA7164_BOARD_HAUPPAUGE_HVR2250,
377 }, {
378 .subvendor = 0x0070,
379 .subdevice = 0x8980,
380 .card = SAA7164_BOARD_HAUPPAUGE_HVR2200,
381 }, {
382 .subvendor = 0x0070,
383 .subdevice = 0x8900,
384 .card = SAA7164_BOARD_HAUPPAUGE_HVR2200_2,
385 }, {
386 .subvendor = 0x0070,
387 .subdevice = 0x8901,
388 .card = SAA7164_BOARD_HAUPPAUGE_HVR2200_3,
389 }, {
390 .subvendor = 0x0070,
391 .subdevice = 0x88A1,
392 .card = SAA7164_BOARD_HAUPPAUGE_HVR2250_3,
393 }, {
394 .subvendor = 0x0070,
395 .subdevice = 0x8891,
396 .card = SAA7164_BOARD_HAUPPAUGE_HVR2250_2,
397 }, {
398 .subvendor = 0x0070,
399 .subdevice = 0x8851,
400 .card = SAA7164_BOARD_HAUPPAUGE_HVR2250_2,
401 },
402 };
403 const unsigned int saa7164_idcount = ARRAY_SIZE(saa7164_subids);
404
405 void saa7164_card_list(struct saa7164_dev *dev)
406 {
407 int i;
408
409 if (0 == dev->pci->subsystem_vendor &&
410 0 == dev->pci->subsystem_device) {
411 printk(KERN_ERR
412 "%s: Board has no valid PCIe Subsystem ID and can't\n"
413 "%s: be autodetected. Pass card=<n> insmod option to\n"
414 "%s: workaround that. Send complaints to the vendor\n"
415 "%s: of the TV card. Best regards,\n"
416 "%s: -- tux\n",
417 dev->name, dev->name, dev->name, dev->name, dev->name);
418 } else {
419 printk(KERN_ERR
420 "%s: Your board isn't known (yet) to the driver.\n"
421 "%s: Try to pick one of the existing card configs via\n"
422 "%s: card=<n> insmod option. Updating to the latest\n"
423 "%s: version might help as well.\n",
424 dev->name, dev->name, dev->name, dev->name);
425 }
426
427 printk(KERN_ERR "%s: Here are valid choices for the card=<n> insmod "
428 "option:\n", dev->name);
429
430 for (i = 0; i < saa7164_bcount; i++)
431 printk(KERN_ERR "%s: card=%d -> %s\n",
432 dev->name, i, saa7164_boards[i].name);
433 }
434
435 /* TODO: clean this define up into the -cards.c structs */
436 #define PCIEBRIDGE_UNITID 2
437
438 void saa7164_gpio_setup(struct saa7164_dev *dev)
439 {
440
441
442 switch (dev->board) {
443 case SAA7164_BOARD_HAUPPAUGE_HVR2200:
444 case SAA7164_BOARD_HAUPPAUGE_HVR2200_2:
445 case SAA7164_BOARD_HAUPPAUGE_HVR2200_3:
446 case SAA7164_BOARD_HAUPPAUGE_HVR2250:
447 case SAA7164_BOARD_HAUPPAUGE_HVR2250_2:
448 case SAA7164_BOARD_HAUPPAUGE_HVR2250_3:
449 /*
450 GPIO 2: s5h1411 / tda10048-1 demod reset
451 GPIO 3: s5h1411 / tda10048-2 demod reset
452 GPIO 7: IRBlaster Zilog reset
453 */
454
455 /* Reset parts by going in and out of reset */
456 saa7164_api_clear_gpiobit(dev, PCIEBRIDGE_UNITID, 2);
457 saa7164_api_clear_gpiobit(dev, PCIEBRIDGE_UNITID, 3);
458
459 msleep(10);
460
461 saa7164_api_set_gpiobit(dev, PCIEBRIDGE_UNITID, 2);
462 saa7164_api_set_gpiobit(dev, PCIEBRIDGE_UNITID, 3);
463 break;
464 }
465
466 }
467
468 static void hauppauge_eeprom(struct saa7164_dev *dev, u8 *eeprom_data)
469 {
470 struct tveeprom tv;
471
472 /* TODO: Assumption: eeprom on bus 0 */
473 tveeprom_hauppauge_analog(&dev->i2c_bus[0].i2c_client, &tv,
474 eeprom_data);
475
476 /* Make sure we support the board model */
477 switch (tv.model) {
478 case 88001:
479 /* Development board - Limit circulation */
480 /* WinTV-HVR2250 (PCIe, Retail, full-height bracket)
481 * ATSC/QAM (TDA18271/S5H1411) and basic analog, no IR, FM */
482 case 88021:
483 /* WinTV-HVR2250 (PCIe, Retail, full-height bracket)
484 * ATSC/QAM (TDA18271/S5H1411) and basic analog, MCE CIR, FM */
485 break;
486 case 88041:
487 /* WinTV-HVR2250 (PCIe, Retail, full-height bracket)
488 * ATSC/QAM (TDA18271/S5H1411) and basic analog, no IR, FM */
489 break;
490 case 88061:
491 /* WinTV-HVR2250 (PCIe, Retail, full-height bracket)
492 * ATSC/QAM (TDA18271/S5H1411) and basic analog, FM */
493 break;
494 case 89519:
495 case 89609:
496 /* WinTV-HVR2200 (PCIe, Retail, full-height)
497 * DVB-T (TDA18271/TDA10048) and basic analog, no IR */
498 break;
499 case 89619:
500 /* WinTV-HVR2200 (PCIe, Retail, half-height)
501 * DVB-T (TDA18271/TDA10048) and basic analog, no IR */
502 break;
503 default:
504 printk(KERN_ERR "%s: Warning: Unknown Hauppauge model #%d\n",
505 dev->name, tv.model);
506 break;
507 }
508
509 printk(KERN_INFO "%s: Hauppauge eeprom: model=%d\n", dev->name,
510 tv.model);
511 }
512
513 void saa7164_card_setup(struct saa7164_dev *dev)
514 {
515 static u8 eeprom[256];
516
517 if (dev->i2c_bus[0].i2c_rc == 0) {
518 if (saa7164_api_read_eeprom(dev, &eeprom[0],
519 sizeof(eeprom)) < 0)
520 return;
521 }
522
523 switch (dev->board) {
524 case SAA7164_BOARD_HAUPPAUGE_HVR2200:
525 case SAA7164_BOARD_HAUPPAUGE_HVR2200_2:
526 case SAA7164_BOARD_HAUPPAUGE_HVR2200_3:
527 case SAA7164_BOARD_HAUPPAUGE_HVR2250:
528 case SAA7164_BOARD_HAUPPAUGE_HVR2250_2:
529 case SAA7164_BOARD_HAUPPAUGE_HVR2250_3:
530 hauppauge_eeprom(dev, &eeprom[0]);
531 break;
532 }
533 }
534
535 /* With most other drivers, the kernel expects to communicate with subdrivers
536 * through i2c. This bridge does not allow that, it does not expose any direct
537 * access to I2C. Instead we have to communicate through the device f/w for
538 * register access to 'processing units'. Each unit has a unique
539 * id, regardless of how the physical implementation occurs across
540 * the three physical i2c busses. The being said if we want leverge of
541 * the existing kernel drivers for tuners and demods we have to 'speak i2c',
542 * to this bridge implements 3 virtual i2c buses. This is a helper function
543 * for those.
544 *
545 * Description: Translate the kernels notion of an i2c address and bus into
546 * the appropriate unitid.
547 */
548 int saa7164_i2caddr_to_unitid(struct saa7164_i2c *bus, int addr)
549 {
550 /* For a given bus and i2c device address, return the saa7164 unique
551 * unitid. < 0 on error */
552
553 struct saa7164_dev *dev = bus->dev;
554 struct saa7164_unit *unit;
555 int i;
556
557 for (i = 0; i < SAA7164_MAX_UNITS; i++) {
558 unit = &saa7164_boards[dev->board].unit[i];
559
560 if (unit->type == SAA7164_UNIT_UNDEFINED)
561 continue;
562 if ((bus->nr == unit->i2c_bus_nr) &&
563 (addr == unit->i2c_bus_addr))
564 return unit->id;
565 }
566
567 return -1;
568 }
569
570 /* The 7164 API needs to know the i2c register length in advance.
571 * this is a helper function. Based on a specific chip addr and bus return the
572 * reg length.
573 */
574 int saa7164_i2caddr_to_reglen(struct saa7164_i2c *bus, int addr)
575 {
576 /* For a given bus and i2c device address, return the
577 * saa7164 registry address width. < 0 on error
578 */
579
580 struct saa7164_dev *dev = bus->dev;
581 struct saa7164_unit *unit;
582 int i;
583
584 for (i = 0; i < SAA7164_MAX_UNITS; i++) {
585 unit = &saa7164_boards[dev->board].unit[i];
586
587 if (unit->type == SAA7164_UNIT_UNDEFINED)
588 continue;
589
590 if ((bus->nr == unit->i2c_bus_nr) &&
591 (addr == unit->i2c_bus_addr))
592 return unit->i2c_reg_len;
593 }
594
595 return -1;
596 }
597 /* TODO: implement a 'findeeprom' functio like the above and fix any other
598 * eeprom related todo's in -api.c.
599 */
600
601 /* Translate a unitid into a x readable device name, for display purposes. */
602 char *saa7164_unitid_name(struct saa7164_dev *dev, u8 unitid)
603 {
604 char *undefed = "UNDEFINED";
605 char *bridge = "BRIDGE";
606 struct saa7164_unit *unit;
607 int i;
608
609 if (unitid == 0)
610 return bridge;
611
612 for (i = 0; i < SAA7164_MAX_UNITS; i++) {
613 unit = &saa7164_boards[dev->board].unit[i];
614
615 if (unit->type == SAA7164_UNIT_UNDEFINED)
616 continue;
617
618 if (unitid == unit->id)
619 return unit->name;
620 }
621
622 return undefed;
623 }
624
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