diff options
author | Manu Abraham <manu@linuxtv.org> | 2006-03-17 10:07:22 -0500 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2006-03-24 14:26:50 -0500 |
commit | faecfb1760325613debd8df9b9374ce4a28c01d9 (patch) | |
tree | 844e0446e82f07c5d8007d62f7e3a842987e194b /drivers/media/video/bt8xx/bttv-i2c.c | |
parent | 280323ddbc595c463f89c30f3f0f823b076bb4e3 (diff) |
V4L/DVB (3539): Move bttv fragments to bt8xx/
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/bt8xx/bttv-i2c.c')
-rw-r--r-- | drivers/media/video/bt8xx/bttv-i2c.c | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/drivers/media/video/bt8xx/bttv-i2c.c b/drivers/media/video/bt8xx/bttv-i2c.c new file mode 100644 index 000000000000..614c12018557 --- /dev/null +++ b/drivers/media/video/bt8xx/bttv-i2c.c | |||
@@ -0,0 +1,474 @@ | |||
1 | /* | ||
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) | ||
8 | & Marcus Metzler (mocm@thp.uni-koeln.de) | ||
9 | (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org> | ||
10 | |||
11 | This program is free software; you can redistribute it and/or modify | ||
12 | it under the terms of the GNU General Public License as published by | ||
13 | the Free Software Foundation; either version 2 of the License, or | ||
14 | (at your option) any later version. | ||
15 | |||
16 | This program is distributed in the hope that it will be useful, | ||
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
19 | GNU General Public License for more details. | ||
20 | |||
21 | You should have received a copy of the GNU General Public License | ||
22 | along with this program; if not, write to the Free Software | ||
23 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
24 | |||
25 | */ | ||
26 | |||
27 | #include <linux/module.h> | ||
28 | #include <linux/moduleparam.h> | ||
29 | #include <linux/init.h> | ||
30 | #include <linux/delay.h> | ||
31 | |||
32 | #include "bttvp.h" | ||
33 | #include <media/v4l2-common.h> | ||
34 | #include <linux/jiffies.h> | ||
35 | #include <asm/io.h> | ||
36 | |||
37 | static struct i2c_algo_bit_data bttv_i2c_algo_bit_template; | ||
38 | static struct i2c_adapter bttv_i2c_adap_sw_template; | ||
39 | static struct i2c_adapter bttv_i2c_adap_hw_template; | ||
40 | static struct i2c_client bttv_i2c_client_template; | ||
41 | |||
42 | static int attach_inform(struct i2c_client *client); | ||
43 | |||
44 | static int i2c_debug; | ||
45 | static int i2c_hw; | ||
46 | static int i2c_scan; | ||
47 | module_param(i2c_debug, int, 0644); | ||
48 | module_param(i2c_hw, int, 0444); | ||
49 | module_param(i2c_scan, int, 0444); | ||
50 | MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); | ||
51 | |||
52 | /* ----------------------------------------------------------------------- */ | ||
53 | /* I2C functions - bitbanging adapter (software i2c) */ | ||
54 | |||
55 | static void bttv_bit_setscl(void *data, int state) | ||
56 | { | ||
57 | struct bttv *btv = (struct bttv*)data; | ||
58 | |||
59 | if (state) | ||
60 | btv->i2c_state |= 0x02; | ||
61 | else | ||
62 | btv->i2c_state &= ~0x02; | ||
63 | btwrite(btv->i2c_state, BT848_I2C); | ||
64 | btread(BT848_I2C); | ||
65 | } | ||
66 | |||
67 | static void bttv_bit_setsda(void *data, int state) | ||
68 | { | ||
69 | struct bttv *btv = (struct bttv*)data; | ||
70 | |||
71 | if (state) | ||
72 | btv->i2c_state |= 0x01; | ||
73 | else | ||
74 | btv->i2c_state &= ~0x01; | ||
75 | btwrite(btv->i2c_state, BT848_I2C); | ||
76 | btread(BT848_I2C); | ||
77 | } | ||
78 | |||
79 | static int bttv_bit_getscl(void *data) | ||
80 | { | ||
81 | struct bttv *btv = (struct bttv*)data; | ||
82 | int state; | ||
83 | |||
84 | state = btread(BT848_I2C) & 0x02 ? 1 : 0; | ||
85 | return state; | ||
86 | } | ||
87 | |||
88 | static int bttv_bit_getsda(void *data) | ||
89 | { | ||
90 | struct bttv *btv = (struct bttv*)data; | ||
91 | int state; | ||
92 | |||
93 | state = btread(BT848_I2C) & 0x01; | ||
94 | return state; | ||
95 | } | ||
96 | |||
97 | static struct i2c_algo_bit_data bttv_i2c_algo_bit_template = { | ||
98 | .setsda = bttv_bit_setsda, | ||
99 | .setscl = bttv_bit_setscl, | ||
100 | .getsda = bttv_bit_getsda, | ||
101 | .getscl = bttv_bit_getscl, | ||
102 | .udelay = 16, | ||
103 | .mdelay = 10, | ||
104 | .timeout = 200, | ||
105 | }; | ||
106 | |||
107 | static struct i2c_adapter bttv_i2c_adap_sw_template = { | ||
108 | .owner = THIS_MODULE, | ||
109 | .class = I2C_CLASS_TV_ANALOG, | ||
110 | .name = "bttv", | ||
111 | .id = I2C_HW_B_BT848, | ||
112 | .client_register = attach_inform, | ||
113 | }; | ||
114 | |||
115 | /* ----------------------------------------------------------------------- */ | ||
116 | /* I2C functions - hardware i2c */ | ||
117 | |||
118 | static int algo_control(struct i2c_adapter *adapter, | ||
119 | unsigned int cmd, unsigned long arg) | ||
120 | { | ||
121 | return 0; | ||
122 | } | ||
123 | |||
124 | static u32 functionality(struct i2c_adapter *adap) | ||
125 | { | ||
126 | return I2C_FUNC_SMBUS_EMUL; | ||
127 | } | ||
128 | |||
129 | static int | ||
130 | bttv_i2c_wait_done(struct bttv *btv) | ||
131 | { | ||
132 | int rc = 0; | ||
133 | |||
134 | /* timeout */ | ||
135 | if (wait_event_interruptible_timeout(btv->i2c_queue, | ||
136 | btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS) | ||
137 | |||
138 | rc = -EIO; | ||
139 | |||
140 | if (btv->i2c_done & BT848_INT_RACK) | ||
141 | rc = 1; | ||
142 | btv->i2c_done = 0; | ||
143 | return rc; | ||
144 | } | ||
145 | |||
146 | #define I2C_HW (BT878_I2C_MODE | BT848_I2C_SYNC |\ | ||
147 | BT848_I2C_SCL | BT848_I2C_SDA) | ||
148 | |||
149 | static int | ||
150 | bttv_i2c_sendbytes(struct bttv *btv, const struct i2c_msg *msg, int last) | ||
151 | { | ||
152 | u32 xmit; | ||
153 | int retval,cnt; | ||
154 | |||
155 | /* sanity checks */ | ||
156 | if (0 == msg->len) | ||
157 | return -EINVAL; | ||
158 | |||
159 | /* start, address + first byte */ | ||
160 | xmit = (msg->addr << 25) | (msg->buf[0] << 16) | I2C_HW; | ||
161 | if (msg->len > 1 || !last) | ||
162 | xmit |= BT878_I2C_NOSTOP; | ||
163 | btwrite(xmit, BT848_I2C); | ||
164 | retval = bttv_i2c_wait_done(btv); | ||
165 | if (retval < 0) | ||
166 | goto err; | ||
167 | if (retval == 0) | ||
168 | goto eio; | ||
169 | if (i2c_debug) { | ||
170 | printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]); | ||
171 | if (!(xmit & BT878_I2C_NOSTOP)) | ||
172 | printk(" >\n"); | ||
173 | } | ||
174 | |||
175 | for (cnt = 1; cnt < msg->len; cnt++ ) { | ||
176 | /* following bytes */ | ||
177 | xmit = (msg->buf[cnt] << 24) | I2C_HW | BT878_I2C_NOSTART; | ||
178 | if (cnt < msg->len-1 || !last) | ||
179 | xmit |= BT878_I2C_NOSTOP; | ||
180 | btwrite(xmit, BT848_I2C); | ||
181 | retval = bttv_i2c_wait_done(btv); | ||
182 | if (retval < 0) | ||
183 | goto err; | ||
184 | if (retval == 0) | ||
185 | goto eio; | ||
186 | if (i2c_debug) { | ||
187 | printk(" %02x", msg->buf[cnt]); | ||
188 | if (!(xmit & BT878_I2C_NOSTOP)) | ||
189 | printk(" >\n"); | ||
190 | } | ||
191 | } | ||
192 | return msg->len; | ||
193 | |||
194 | eio: | ||
195 | retval = -EIO; | ||
196 | err: | ||
197 | if (i2c_debug) | ||
198 | printk(" ERR: %d\n",retval); | ||
199 | return retval; | ||
200 | } | ||
201 | |||
202 | static int | ||
203 | bttv_i2c_readbytes(struct bttv *btv, const struct i2c_msg *msg, int last) | ||
204 | { | ||
205 | u32 xmit; | ||
206 | u32 cnt; | ||
207 | int retval; | ||
208 | |||
209 | for(cnt = 0; cnt < msg->len; cnt++) { | ||
210 | xmit = (msg->addr << 25) | (1 << 24) | I2C_HW; | ||
211 | if (cnt < msg->len-1) | ||
212 | xmit |= BT848_I2C_W3B; | ||
213 | if (cnt < msg->len-1 || !last) | ||
214 | xmit |= BT878_I2C_NOSTOP; | ||
215 | if (cnt) | ||
216 | xmit |= BT878_I2C_NOSTART; | ||
217 | btwrite(xmit, BT848_I2C); | ||
218 | retval = bttv_i2c_wait_done(btv); | ||
219 | if (retval < 0) | ||
220 | goto err; | ||
221 | if (retval == 0) | ||
222 | goto eio; | ||
223 | msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff; | ||
224 | if (i2c_debug) { | ||
225 | if (!(xmit & BT878_I2C_NOSTART)) | ||
226 | printk(" <R %02x", (msg->addr << 1) +1); | ||
227 | printk(" =%02x", msg->buf[cnt]); | ||
228 | if (!(xmit & BT878_I2C_NOSTOP)) | ||
229 | printk(" >\n"); | ||
230 | } | ||
231 | } | ||
232 | return msg->len; | ||
233 | |||
234 | eio: | ||
235 | retval = -EIO; | ||
236 | err: | ||
237 | if (i2c_debug) | ||
238 | printk(" ERR: %d\n",retval); | ||
239 | return retval; | ||
240 | } | ||
241 | |||
242 | static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) | ||
243 | { | ||
244 | struct bttv *btv = i2c_get_adapdata(i2c_adap); | ||
245 | int retval = 0; | ||
246 | int i; | ||
247 | |||
248 | if (i2c_debug) | ||
249 | printk("bt-i2c:"); | ||
250 | btwrite(BT848_INT_I2CDONE|BT848_INT_RACK, BT848_INT_STAT); | ||
251 | for (i = 0 ; i < num; i++) { | ||
252 | if (msgs[i].flags & I2C_M_RD) { | ||
253 | /* read */ | ||
254 | retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num); | ||
255 | if (retval < 0) | ||
256 | goto err; | ||
257 | } else { | ||
258 | /* write */ | ||
259 | retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num); | ||
260 | if (retval < 0) | ||
261 | goto err; | ||
262 | } | ||
263 | } | ||
264 | return num; | ||
265 | |||
266 | err: | ||
267 | return retval; | ||
268 | } | ||
269 | |||
270 | static struct i2c_algorithm bttv_algo = { | ||
271 | .master_xfer = bttv_i2c_xfer, | ||
272 | .algo_control = algo_control, | ||
273 | .functionality = functionality, | ||
274 | }; | ||
275 | |||
276 | static struct i2c_adapter bttv_i2c_adap_hw_template = { | ||
277 | .owner = THIS_MODULE, | ||
278 | .class = I2C_CLASS_TV_ANALOG, | ||
279 | .name = "bt878", | ||
280 | .id = I2C_HW_B_BT848 /* FIXME */, | ||
281 | .algo = &bttv_algo, | ||
282 | .client_register = attach_inform, | ||
283 | }; | ||
284 | |||
285 | /* ----------------------------------------------------------------------- */ | ||
286 | /* I2C functions - common stuff */ | ||
287 | |||
288 | static int attach_inform(struct i2c_client *client) | ||
289 | { | ||
290 | struct bttv *btv = i2c_get_adapdata(client->adapter); | ||
291 | int addr=ADDR_UNSET; | ||
292 | |||
293 | |||
294 | if (ADDR_UNSET != bttv_tvcards[btv->c.type].tuner_addr) | ||
295 | addr = bttv_tvcards[btv->c.type].tuner_addr; | ||
296 | |||
297 | |||
298 | if (bttv_debug) | ||
299 | printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n", | ||
300 | btv->c.nr, client->driver->driver.name, client->addr, | ||
301 | client->name); | ||
302 | if (!client->driver->command) | ||
303 | return 0; | ||
304 | |||
305 | if (btv->tuner_type != UNSET) { | ||
306 | struct tuner_setup tun_setup; | ||
307 | |||
308 | if ((addr==ADDR_UNSET) || | ||
309 | (addr==client->addr)) { | ||
310 | |||
311 | tun_setup.mode_mask = T_ANALOG_TV | T_DIGITAL_TV | T_RADIO; | ||
312 | tun_setup.type = btv->tuner_type; | ||
313 | tun_setup.addr = addr; | ||
314 | bttv_call_i2c_clients(btv, TUNER_SET_TYPE_ADDR, &tun_setup); | ||
315 | } | ||
316 | |||
317 | } | ||
318 | |||
319 | return 0; | ||
320 | } | ||
321 | |||
322 | void bttv_call_i2c_clients(struct bttv *btv, unsigned int cmd, void *arg) | ||
323 | { | ||
324 | if (0 != btv->i2c_rc) | ||
325 | return; | ||
326 | i2c_clients_command(&btv->c.i2c_adap, cmd, arg); | ||
327 | } | ||
328 | |||
329 | static struct i2c_client bttv_i2c_client_template = { | ||
330 | .name = "bttv internal", | ||
331 | }; | ||
332 | |||
333 | |||
334 | /* read I2C */ | ||
335 | int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for) | ||
336 | { | ||
337 | unsigned char buffer = 0; | ||
338 | |||
339 | if (0 != btv->i2c_rc) | ||
340 | return -1; | ||
341 | if (bttv_verbose && NULL != probe_for) | ||
342 | printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ", | ||
343 | btv->c.nr,probe_for,addr); | ||
344 | btv->i2c_client.addr = addr >> 1; | ||
345 | if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) { | ||
346 | if (NULL != probe_for) { | ||
347 | if (bttv_verbose) | ||
348 | printk("not found\n"); | ||
349 | } else | ||
350 | printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n", | ||
351 | btv->c.nr,addr); | ||
352 | return -1; | ||
353 | } | ||
354 | if (bttv_verbose && NULL != probe_for) | ||
355 | printk("found\n"); | ||
356 | return buffer; | ||
357 | } | ||
358 | |||
359 | /* write I2C */ | ||
360 | int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1, | ||
361 | unsigned char b2, int both) | ||
362 | { | ||
363 | unsigned char buffer[2]; | ||
364 | int bytes = both ? 2 : 1; | ||
365 | |||
366 | if (0 != btv->i2c_rc) | ||
367 | return -1; | ||
368 | btv->i2c_client.addr = addr >> 1; | ||
369 | buffer[0] = b1; | ||
370 | buffer[1] = b2; | ||
371 | if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes)) | ||
372 | return -1; | ||
373 | return 0; | ||
374 | } | ||
375 | |||
376 | /* read EEPROM content */ | ||
377 | void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr) | ||
378 | { | ||
379 | memset(eedata, 0, 256); | ||
380 | if (0 != btv->i2c_rc) | ||
381 | return; | ||
382 | btv->i2c_client.addr = addr >> 1; | ||
383 | tveeprom_read(&btv->i2c_client, eedata, 256); | ||
384 | } | ||
385 | |||
386 | static char *i2c_devs[128] = { | ||
387 | [ 0x1c >> 1 ] = "lgdt330x", | ||
388 | [ 0x30 >> 1 ] = "IR (hauppauge)", | ||
389 | [ 0x80 >> 1 ] = "msp34xx", | ||
390 | [ 0x86 >> 1 ] = "tda9887", | ||
391 | [ 0xa0 >> 1 ] = "eeprom", | ||
392 | [ 0xc0 >> 1 ] = "tuner (analog)", | ||
393 | [ 0xc2 >> 1 ] = "tuner (analog)", | ||
394 | }; | ||
395 | |||
396 | static void do_i2c_scan(char *name, struct i2c_client *c) | ||
397 | { | ||
398 | unsigned char buf; | ||
399 | int i,rc; | ||
400 | |||
401 | for (i = 0; i < 128; i++) { | ||
402 | c->addr = i; | ||
403 | rc = i2c_master_recv(c,&buf,0); | ||
404 | if (rc < 0) | ||
405 | continue; | ||
406 | printk("%s: i2c scan: found device @ 0x%x [%s]\n", | ||
407 | name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); | ||
408 | } | ||
409 | } | ||
410 | |||
411 | /* init + register i2c algo-bit adapter */ | ||
412 | int __devinit init_bttv_i2c(struct bttv *btv) | ||
413 | { | ||
414 | memcpy(&btv->i2c_client, &bttv_i2c_client_template, | ||
415 | sizeof(bttv_i2c_client_template)); | ||
416 | |||
417 | if (i2c_hw) | ||
418 | btv->use_i2c_hw = 1; | ||
419 | if (btv->use_i2c_hw) { | ||
420 | /* bt878 */ | ||
421 | memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_hw_template, | ||
422 | sizeof(bttv_i2c_adap_hw_template)); | ||
423 | } else { | ||
424 | /* bt848 */ | ||
425 | memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_sw_template, | ||
426 | sizeof(bttv_i2c_adap_sw_template)); | ||
427 | memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template, | ||
428 | sizeof(bttv_i2c_algo_bit_template)); | ||
429 | btv->i2c_algo.data = btv; | ||
430 | btv->c.i2c_adap.algo_data = &btv->i2c_algo; | ||
431 | } | ||
432 | |||
433 | btv->c.i2c_adap.dev.parent = &btv->c.pci->dev; | ||
434 | snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name), | ||
435 | "bt%d #%d [%s]", btv->id, btv->c.nr, | ||
436 | btv->use_i2c_hw ? "hw" : "sw"); | ||
437 | |||
438 | i2c_set_adapdata(&btv->c.i2c_adap, btv); | ||
439 | btv->i2c_client.adapter = &btv->c.i2c_adap; | ||
440 | |||
441 | if (bttv_tvcards[btv->c.type].no_video) | ||
442 | btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG; | ||
443 | if (bttv_tvcards[btv->c.type].has_dvb) | ||
444 | btv->c.i2c_adap.class |= I2C_CLASS_TV_DIGITAL; | ||
445 | |||
446 | if (btv->use_i2c_hw) { | ||
447 | btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap); | ||
448 | } else { | ||
449 | bttv_bit_setscl(btv,1); | ||
450 | bttv_bit_setsda(btv,1); | ||
451 | btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap); | ||
452 | } | ||
453 | if (0 == btv->i2c_rc && i2c_scan) | ||
454 | do_i2c_scan(btv->c.name,&btv->i2c_client); | ||
455 | return btv->i2c_rc; | ||
456 | } | ||
457 | |||
458 | int __devexit fini_bttv_i2c(struct bttv *btv) | ||
459 | { | ||
460 | if (0 != btv->i2c_rc) | ||
461 | return 0; | ||
462 | |||
463 | if (btv->use_i2c_hw) { | ||
464 | return i2c_del_adapter(&btv->c.i2c_adap); | ||
465 | } else { | ||
466 | return i2c_bit_del_bus(&btv->c.i2c_adap); | ||
467 | } | ||
468 | } | ||
469 | |||
470 | /* | ||
471 | * Local variables: | ||
472 | * c-basic-offset: 8 | ||
473 | * End: | ||
474 | */ | ||