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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | |
3 | bttv-i2c.c -- all the i2c code is here | |
4 | ||
5 | bttv - Bt848 frame grabber driver | |
6 | ||
7 | Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de) | |
4ac97914 | 8 | & Marcus Metzler (mocm@thp.uni-koeln.de) |
1da177e4 LT |
9 | (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org> |
10 | ||
141276b5 MCC |
11 | (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org> |
12 | - Multituner support and i2c address binding | |
13 | ||
1da177e4 LT |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
16 | the Free Software Foundation; either version 2 of the License, or | |
17 | (at your option) any later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program; if not, write to the Free Software | |
26 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | ||
28 | */ | |
29 | ||
30 | #include <linux/module.h> | |
1da177e4 LT |
31 | #include <linux/init.h> |
32 | #include <linux/delay.h> | |
1da177e4 LT |
33 | |
34 | #include "bttvp.h" | |
5e453dc7 | 35 | #include <media/v4l2-common.h> |
b5b8ab8d MCC |
36 | #include <linux/jiffies.h> |
37 | #include <asm/io.h> | |
1da177e4 | 38 | |
1da177e4 LT |
39 | static int attach_inform(struct i2c_client *client); |
40 | ||
a5ed425c MCC |
41 | static int i2c_debug; |
42 | static int i2c_hw; | |
43 | static int i2c_scan; | |
1da177e4 | 44 | module_param(i2c_debug, int, 0644); |
141276b5 | 45 | MODULE_PARM_DESC(i2c_hw,"configure i2c debug level"); |
1da177e4 | 46 | module_param(i2c_hw, int, 0444); |
141276b5 MCC |
47 | MODULE_PARM_DESC(i2c_hw,"force use of hardware i2c support, " |
48 | "instead of software bitbang"); | |
1da177e4 LT |
49 | module_param(i2c_scan, int, 0444); |
50 | MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); | |
51 | ||
141276b5 MCC |
52 | static unsigned int i2c_udelay = 5; |
53 | module_param(i2c_udelay, int, 0444); | |
54 | MODULE_PARM_DESC(i2c_udelay,"soft i2c delay at insmod time, in usecs " | |
55 | "(should be 5 or higher). Lower value means higher bus speed."); | |
56 | ||
1da177e4 LT |
57 | /* ----------------------------------------------------------------------- */ |
58 | /* I2C functions - bitbanging adapter (software i2c) */ | |
59 | ||
60 | static void bttv_bit_setscl(void *data, int state) | |
61 | { | |
62 | struct bttv *btv = (struct bttv*)data; | |
63 | ||
64 | if (state) | |
65 | btv->i2c_state |= 0x02; | |
66 | else | |
67 | btv->i2c_state &= ~0x02; | |
68 | btwrite(btv->i2c_state, BT848_I2C); | |
69 | btread(BT848_I2C); | |
70 | } | |
71 | ||
72 | static void bttv_bit_setsda(void *data, int state) | |
73 | { | |
74 | struct bttv *btv = (struct bttv*)data; | |
75 | ||
76 | if (state) | |
77 | btv->i2c_state |= 0x01; | |
78 | else | |
79 | btv->i2c_state &= ~0x01; | |
80 | btwrite(btv->i2c_state, BT848_I2C); | |
81 | btread(BT848_I2C); | |
82 | } | |
83 | ||
84 | static int bttv_bit_getscl(void *data) | |
85 | { | |
86 | struct bttv *btv = (struct bttv*)data; | |
87 | int state; | |
88 | ||
89 | state = btread(BT848_I2C) & 0x02 ? 1 : 0; | |
90 | return state; | |
91 | } | |
92 | ||
93 | static int bttv_bit_getsda(void *data) | |
94 | { | |
95 | struct bttv *btv = (struct bttv*)data; | |
96 | int state; | |
97 | ||
98 | state = btread(BT848_I2C) & 0x01; | |
99 | return state; | |
100 | } | |
101 | ||
df9b5d4c | 102 | static struct i2c_algo_bit_data __devinitdata bttv_i2c_algo_bit_template = { |
1da177e4 LT |
103 | .setsda = bttv_bit_setsda, |
104 | .setscl = bttv_bit_setscl, | |
105 | .getsda = bttv_bit_getsda, | |
106 | .getscl = bttv_bit_getscl, | |
107 | .udelay = 16, | |
1da177e4 LT |
108 | .timeout = 200, |
109 | }; | |
110 | ||
1da177e4 LT |
111 | /* ----------------------------------------------------------------------- */ |
112 | /* I2C functions - hardware i2c */ | |
113 | ||
1da177e4 LT |
114 | static u32 functionality(struct i2c_adapter *adap) |
115 | { | |
116 | return I2C_FUNC_SMBUS_EMUL; | |
117 | } | |
118 | ||
119 | static int | |
120 | bttv_i2c_wait_done(struct bttv *btv) | |
121 | { | |
1da177e4 LT |
122 | int rc = 0; |
123 | ||
fc9d53af MA |
124 | /* timeout */ |
125 | if (wait_event_interruptible_timeout(btv->i2c_queue, | |
126 | btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS) | |
127 | ||
128 | rc = -EIO; | |
1da177e4 | 129 | |
1da177e4 LT |
130 | if (btv->i2c_done & BT848_INT_RACK) |
131 | rc = 1; | |
132 | btv->i2c_done = 0; | |
133 | return rc; | |
134 | } | |
135 | ||
136 | #define I2C_HW (BT878_I2C_MODE | BT848_I2C_SYNC |\ | |
137 | BT848_I2C_SCL | BT848_I2C_SDA) | |
138 | ||
139 | static int | |
140 | bttv_i2c_sendbytes(struct bttv *btv, const struct i2c_msg *msg, int last) | |
141 | { | |
142 | u32 xmit; | |
143 | int retval,cnt; | |
144 | ||
145 | /* sanity checks */ | |
146 | if (0 == msg->len) | |
147 | return -EINVAL; | |
148 | ||
149 | /* start, address + first byte */ | |
150 | xmit = (msg->addr << 25) | (msg->buf[0] << 16) | I2C_HW; | |
151 | if (msg->len > 1 || !last) | |
152 | xmit |= BT878_I2C_NOSTOP; | |
153 | btwrite(xmit, BT848_I2C); | |
154 | retval = bttv_i2c_wait_done(btv); | |
155 | if (retval < 0) | |
156 | goto err; | |
157 | if (retval == 0) | |
158 | goto eio; | |
159 | if (i2c_debug) { | |
160 | printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]); | |
161 | if (!(xmit & BT878_I2C_NOSTOP)) | |
162 | printk(" >\n"); | |
163 | } | |
164 | ||
165 | for (cnt = 1; cnt < msg->len; cnt++ ) { | |
166 | /* following bytes */ | |
167 | xmit = (msg->buf[cnt] << 24) | I2C_HW | BT878_I2C_NOSTART; | |
168 | if (cnt < msg->len-1 || !last) | |
169 | xmit |= BT878_I2C_NOSTOP; | |
170 | btwrite(xmit, BT848_I2C); | |
171 | retval = bttv_i2c_wait_done(btv); | |
172 | if (retval < 0) | |
173 | goto err; | |
174 | if (retval == 0) | |
175 | goto eio; | |
176 | if (i2c_debug) { | |
177 | printk(" %02x", msg->buf[cnt]); | |
178 | if (!(xmit & BT878_I2C_NOSTOP)) | |
179 | printk(" >\n"); | |
180 | } | |
181 | } | |
182 | return msg->len; | |
183 | ||
184 | eio: | |
185 | retval = -EIO; | |
186 | err: | |
187 | if (i2c_debug) | |
188 | printk(" ERR: %d\n",retval); | |
189 | return retval; | |
190 | } | |
191 | ||
192 | static int | |
193 | bttv_i2c_readbytes(struct bttv *btv, const struct i2c_msg *msg, int last) | |
194 | { | |
195 | u32 xmit; | |
196 | u32 cnt; | |
197 | int retval; | |
198 | ||
199 | for(cnt = 0; cnt < msg->len; cnt++) { | |
200 | xmit = (msg->addr << 25) | (1 << 24) | I2C_HW; | |
201 | if (cnt < msg->len-1) | |
202 | xmit |= BT848_I2C_W3B; | |
203 | if (cnt < msg->len-1 || !last) | |
204 | xmit |= BT878_I2C_NOSTOP; | |
205 | if (cnt) | |
206 | xmit |= BT878_I2C_NOSTART; | |
207 | btwrite(xmit, BT848_I2C); | |
208 | retval = bttv_i2c_wait_done(btv); | |
209 | if (retval < 0) | |
210 | goto err; | |
211 | if (retval == 0) | |
212 | goto eio; | |
213 | msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff; | |
214 | if (i2c_debug) { | |
215 | if (!(xmit & BT878_I2C_NOSTART)) | |
216 | printk(" <R %02x", (msg->addr << 1) +1); | |
217 | printk(" =%02x", msg->buf[cnt]); | |
218 | if (!(xmit & BT878_I2C_NOSTOP)) | |
219 | printk(" >\n"); | |
220 | } | |
221 | } | |
222 | return msg->len; | |
223 | ||
224 | eio: | |
225 | retval = -EIO; | |
226 | err: | |
227 | if (i2c_debug) | |
228 | printk(" ERR: %d\n",retval); | |
4ac97914 | 229 | return retval; |
1da177e4 LT |
230 | } |
231 | ||
232 | static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) | |
233 | { | |
234 | struct bttv *btv = i2c_get_adapdata(i2c_adap); | |
235 | int retval = 0; | |
236 | int i; | |
237 | ||
238 | if (i2c_debug) | |
239 | printk("bt-i2c:"); | |
240 | btwrite(BT848_INT_I2CDONE|BT848_INT_RACK, BT848_INT_STAT); | |
241 | for (i = 0 ; i < num; i++) { | |
242 | if (msgs[i].flags & I2C_M_RD) { | |
243 | /* read */ | |
244 | retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num); | |
245 | if (retval < 0) | |
246 | goto err; | |
247 | } else { | |
248 | /* write */ | |
249 | retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num); | |
250 | if (retval < 0) | |
251 | goto err; | |
252 | } | |
253 | } | |
254 | return num; | |
255 | ||
256 | err: | |
257 | return retval; | |
258 | } | |
259 | ||
df9b5d4c | 260 | static const struct i2c_algorithm bttv_algo = { |
1da177e4 | 261 | .master_xfer = bttv_i2c_xfer, |
1da177e4 LT |
262 | .functionality = functionality, |
263 | }; | |
264 | ||
1da177e4 LT |
265 | /* ----------------------------------------------------------------------- */ |
266 | /* I2C functions - common stuff */ | |
267 | ||
268 | static int attach_inform(struct i2c_client *client) | |
269 | { | |
4ac97914 | 270 | struct bttv *btv = i2c_get_adapdata(client->adapter); |
291d1d73 RC |
271 | int addr=ADDR_UNSET; |
272 | ||
273 | ||
7418f346 LB |
274 | if (ADDR_UNSET != bttv_tvcards[btv->c.type].tuner_addr) |
275 | addr = bttv_tvcards[btv->c.type].tuner_addr; | |
aa8d5e72 | 276 | |
1da177e4 | 277 | |
fa9846a8 MCC |
278 | if (bttv_debug) |
279 | printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n", | |
604f28e2 | 280 | btv->c.nr, client->driver->driver.name, client->addr, |
fae91e72 | 281 | client->name); |
fa9846a8 MCC |
282 | if (!client->driver->command) |
283 | return 0; | |
284 | ||
8bf2f8e7 HV |
285 | if (client->driver->id == I2C_DRIVERID_MSP3400) |
286 | btv->i2c_msp34xx_client = client; | |
287 | if (client->driver->id == I2C_DRIVERID_TVAUDIO) | |
288 | btv->i2c_tvaudio_client = client; | |
abb0362f | 289 | if (btv->tuner_type != TUNER_ABSENT) { |
4ac97914 | 290 | struct tuner_setup tun_setup; |
fa9846a8 | 291 | |
abb0362f | 292 | if (addr == ADDR_UNSET || addr == client->addr) { |
7418f346 LB |
293 | tun_setup.mode_mask = T_ANALOG_TV | T_DIGITAL_TV | T_RADIO; |
294 | tun_setup.type = btv->tuner_type; | |
291d1d73 | 295 | tun_setup.addr = addr; |
7418f346 | 296 | bttv_call_i2c_clients(btv, TUNER_SET_TYPE_ADDR, &tun_setup); |
85a2eb07 | 297 | } |
291d1d73 | 298 | |
fa9846a8 MCC |
299 | } |
300 | ||
4ac97914 | 301 | return 0; |
1da177e4 LT |
302 | } |
303 | ||
304 | void bttv_call_i2c_clients(struct bttv *btv, unsigned int cmd, void *arg) | |
305 | { | |
306 | if (0 != btv->i2c_rc) | |
307 | return; | |
308 | i2c_clients_command(&btv->c.i2c_adap, cmd, arg); | |
309 | } | |
310 | ||
1da177e4 LT |
311 | |
312 | /* read I2C */ | |
313 | int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for) | |
314 | { | |
4ac97914 | 315 | unsigned char buffer = 0; |
1da177e4 LT |
316 | |
317 | if (0 != btv->i2c_rc) | |
318 | return -1; | |
319 | if (bttv_verbose && NULL != probe_for) | |
320 | printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ", | |
321 | btv->c.nr,probe_for,addr); | |
4ac97914 MCC |
322 | btv->i2c_client.addr = addr >> 1; |
323 | if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) { | |
1da177e4 LT |
324 | if (NULL != probe_for) { |
325 | if (bttv_verbose) | |
326 | printk("not found\n"); | |
327 | } else | |
328 | printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n", | |
329 | btv->c.nr,addr); | |
4ac97914 | 330 | return -1; |
1da177e4 LT |
331 | } |
332 | if (bttv_verbose && NULL != probe_for) | |
333 | printk("found\n"); | |
4ac97914 | 334 | return buffer; |
1da177e4 LT |
335 | } |
336 | ||
337 | /* write I2C */ | |
338 | int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1, | |
4ac97914 | 339 | unsigned char b2, int both) |
1da177e4 | 340 | { |
4ac97914 MCC |
341 | unsigned char buffer[2]; |
342 | int bytes = both ? 2 : 1; | |
1da177e4 LT |
343 | |
344 | if (0 != btv->i2c_rc) | |
345 | return -1; | |
4ac97914 MCC |
346 | btv->i2c_client.addr = addr >> 1; |
347 | buffer[0] = b1; | |
348 | buffer[1] = b2; | |
349 | if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes)) | |
1da177e4 | 350 | return -1; |
4ac97914 | 351 | return 0; |
1da177e4 LT |
352 | } |
353 | ||
354 | /* read EEPROM content */ | |
355 | void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr) | |
356 | { | |
5daf05fb GK |
357 | memset(eedata, 0, 256); |
358 | if (0 != btv->i2c_rc) | |
359 | return; | |
1da177e4 LT |
360 | btv->i2c_client.addr = addr >> 1; |
361 | tveeprom_read(&btv->i2c_client, eedata, 256); | |
362 | } | |
363 | ||
364 | static char *i2c_devs[128] = { | |
24a70fdc | 365 | [ 0x1c >> 1 ] = "lgdt330x", |
1da177e4 LT |
366 | [ 0x30 >> 1 ] = "IR (hauppauge)", |
367 | [ 0x80 >> 1 ] = "msp34xx", | |
368 | [ 0x86 >> 1 ] = "tda9887", | |
369 | [ 0xa0 >> 1 ] = "eeprom", | |
370 | [ 0xc0 >> 1 ] = "tuner (analog)", | |
371 | [ 0xc2 >> 1 ] = "tuner (analog)", | |
372 | }; | |
373 | ||
374 | static void do_i2c_scan(char *name, struct i2c_client *c) | |
375 | { | |
376 | unsigned char buf; | |
377 | int i,rc; | |
378 | ||
53c4e955 | 379 | for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) { |
1da177e4 LT |
380 | c->addr = i; |
381 | rc = i2c_master_recv(c,&buf,0); | |
382 | if (rc < 0) | |
383 | continue; | |
384 | printk("%s: i2c scan: found device @ 0x%x [%s]\n", | |
385 | name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); | |
386 | } | |
387 | } | |
388 | ||
389 | /* init + register i2c algo-bit adapter */ | |
390 | int __devinit init_bttv_i2c(struct bttv *btv) | |
391 | { | |
df9b5d4c | 392 | strlcpy(btv->i2c_client.name, "bttv internal", I2C_NAME_SIZE); |
1da177e4 LT |
393 | |
394 | if (i2c_hw) | |
395 | btv->use_i2c_hw = 1; | |
396 | if (btv->use_i2c_hw) { | |
397 | /* bt878 */ | |
df9b5d4c JD |
398 | strlcpy(btv->c.i2c_adap.name, "bt878", |
399 | sizeof(btv->c.i2c_adap.name)); | |
400 | btv->c.i2c_adap.id = I2C_HW_B_BT848; /* FIXME */ | |
401 | btv->c.i2c_adap.algo = &bttv_algo; | |
1da177e4 LT |
402 | } else { |
403 | /* bt848 */ | |
141276b5 MCC |
404 | /* Prevents usage of invalid delay values */ |
405 | if (i2c_udelay<5) | |
406 | i2c_udelay=5; | |
141276b5 | 407 | |
df9b5d4c JD |
408 | strlcpy(btv->c.i2c_adap.name, "bttv", |
409 | sizeof(btv->c.i2c_adap.name)); | |
410 | btv->c.i2c_adap.id = I2C_HW_B_BT848; | |
1da177e4 LT |
411 | memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template, |
412 | sizeof(bttv_i2c_algo_bit_template)); | |
df9b5d4c | 413 | btv->i2c_algo.udelay = i2c_udelay; |
1da177e4 LT |
414 | btv->i2c_algo.data = btv; |
415 | btv->c.i2c_adap.algo_data = &btv->i2c_algo; | |
416 | } | |
df9b5d4c JD |
417 | btv->c.i2c_adap.owner = THIS_MODULE; |
418 | btv->c.i2c_adap.class = I2C_CLASS_TV_ANALOG; | |
419 | btv->c.i2c_adap.client_register = attach_inform; | |
1da177e4 LT |
420 | |
421 | btv->c.i2c_adap.dev.parent = &btv->c.pci->dev; | |
422 | snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name), | |
423 | "bt%d #%d [%s]", btv->id, btv->c.nr, | |
424 | btv->use_i2c_hw ? "hw" : "sw"); | |
425 | ||
4ac97914 MCC |
426 | i2c_set_adapdata(&btv->c.i2c_adap, btv); |
427 | btv->i2c_client.adapter = &btv->c.i2c_adap; | |
1da177e4 | 428 | |
1da177e4 LT |
429 | if (bttv_tvcards[btv->c.type].no_video) |
430 | btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG; | |
431 | if (bttv_tvcards[btv->c.type].has_dvb) | |
432 | btv->c.i2c_adap.class |= I2C_CLASS_TV_DIGITAL; | |
1da177e4 LT |
433 | |
434 | if (btv->use_i2c_hw) { | |
435 | btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap); | |
436 | } else { | |
437 | bttv_bit_setscl(btv,1); | |
438 | bttv_bit_setsda(btv,1); | |
439 | btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap); | |
440 | } | |
441 | if (0 == btv->i2c_rc && i2c_scan) | |
442 | do_i2c_scan(btv->c.name,&btv->i2c_client); | |
443 | return btv->i2c_rc; | |
444 | } | |
445 | ||
446 | int __devexit fini_bttv_i2c(struct bttv *btv) | |
447 | { | |
448 | if (0 != btv->i2c_rc) | |
449 | return 0; | |
450 | ||
3269711b | 451 | return i2c_del_adapter(&btv->c.i2c_adap); |
1da177e4 LT |
452 | } |
453 | ||
454 | /* | |
455 | * Local variables: | |
456 | * c-basic-offset: 8 | |
457 | * End: | |
458 | */ |