[PATCH] v4l: 669: added prolink pixelview pv bt878p rev 2e compatibility
[linux-2.6] / drivers / media / video / bttv-i2c.c
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 #include <linux/jiffies.h>
32 #include <asm/io.h>
33
34 #include "bttvp.h"
35
36 static struct i2c_algo_bit_data bttv_i2c_algo_bit_template;
37 static struct i2c_adapter bttv_i2c_adap_sw_template;
38 static struct i2c_adapter bttv_i2c_adap_hw_template;
39 static struct i2c_client bttv_i2c_client_template;
40
41 static int attach_inform(struct i2c_client *client);
42
43 static int i2c_debug = 0;
44 static int i2c_hw = 0;
45 static int i2c_scan = 0;
46 module_param(i2c_debug, int, 0644);
47 module_param(i2c_hw,    int, 0444);
48 module_param(i2c_scan,  int, 0444);
49 MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
50
51 /* ----------------------------------------------------------------------- */
52 /* I2C functions - bitbanging adapter (software i2c)                       */
53
54 static void bttv_bit_setscl(void *data, int state)
55 {
56         struct bttv *btv = (struct bttv*)data;
57
58         if (state)
59                 btv->i2c_state |= 0x02;
60         else
61                 btv->i2c_state &= ~0x02;
62         btwrite(btv->i2c_state, BT848_I2C);
63         btread(BT848_I2C);
64 }
65
66 static void bttv_bit_setsda(void *data, int state)
67 {
68         struct bttv *btv = (struct bttv*)data;
69
70         if (state)
71                 btv->i2c_state |= 0x01;
72         else
73                 btv->i2c_state &= ~0x01;
74         btwrite(btv->i2c_state, BT848_I2C);
75         btread(BT848_I2C);
76 }
77
78 static int bttv_bit_getscl(void *data)
79 {
80         struct bttv *btv = (struct bttv*)data;
81         int state;
82
83         state = btread(BT848_I2C) & 0x02 ? 1 : 0;
84         return state;
85 }
86
87 static int bttv_bit_getsda(void *data)
88 {
89         struct bttv *btv = (struct bttv*)data;
90         int state;
91
92         state = btread(BT848_I2C) & 0x01;
93         return state;
94 }
95
96 static struct i2c_algo_bit_data bttv_i2c_algo_bit_template = {
97         .setsda  = bttv_bit_setsda,
98         .setscl  = bttv_bit_setscl,
99         .getsda  = bttv_bit_getsda,
100         .getscl  = bttv_bit_getscl,
101         .udelay  = 16,
102         .mdelay  = 10,
103         .timeout = 200,
104 };
105
106 static struct i2c_adapter bttv_i2c_adap_sw_template = {
107         .owner             = THIS_MODULE,
108 #ifdef I2C_CLASS_TV_ANALOG
109         .class             = I2C_CLASS_TV_ANALOG,
110 #endif
111         .name              = "bt848",
112         .id                = I2C_HW_B_BT848,
113         .client_register   = attach_inform,
114 };
115
116 /* ----------------------------------------------------------------------- */
117 /* I2C functions - hardware i2c                                            */
118
119 static int algo_control(struct i2c_adapter *adapter,
120                         unsigned int cmd, unsigned long arg)
121 {
122         return 0;
123 }
124
125 static u32 functionality(struct i2c_adapter *adap)
126 {
127         return I2C_FUNC_SMBUS_EMUL;
128 }
129
130 static int
131 bttv_i2c_wait_done(struct bttv *btv)
132 {
133         int rc = 0;
134
135         /* timeout */
136         if (wait_event_interruptible_timeout(btv->i2c_queue,
137                 btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS)
138
139         rc = -EIO;
140
141         if (btv->i2c_done & BT848_INT_RACK)
142                 rc = 1;
143         btv->i2c_done = 0;
144         return rc;
145 }
146
147 #define I2C_HW (BT878_I2C_MODE  | BT848_I2C_SYNC |\
148                 BT848_I2C_SCL | BT848_I2C_SDA)
149
150 static int
151 bttv_i2c_sendbytes(struct bttv *btv, const struct i2c_msg *msg, int last)
152 {
153         u32 xmit;
154         int retval,cnt;
155
156         /* sanity checks */
157         if (0 == msg->len)
158                 return -EINVAL;
159
160         /* start, address + first byte */
161         xmit = (msg->addr << 25) | (msg->buf[0] << 16) | I2C_HW;
162         if (msg->len > 1 || !last)
163                 xmit |= BT878_I2C_NOSTOP;
164         btwrite(xmit, BT848_I2C);
165         retval = bttv_i2c_wait_done(btv);
166         if (retval < 0)
167                 goto err;
168         if (retval == 0)
169                 goto eio;
170         if (i2c_debug) {
171                 printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
172                 if (!(xmit & BT878_I2C_NOSTOP))
173                         printk(" >\n");
174         }
175
176         for (cnt = 1; cnt < msg->len; cnt++ ) {
177                 /* following bytes */
178                 xmit = (msg->buf[cnt] << 24) | I2C_HW | BT878_I2C_NOSTART;
179                 if (cnt < msg->len-1 || !last)
180                         xmit |= BT878_I2C_NOSTOP;
181                 btwrite(xmit, BT848_I2C);
182                 retval = bttv_i2c_wait_done(btv);
183                 if (retval < 0)
184                         goto err;
185                 if (retval == 0)
186                         goto eio;
187                 if (i2c_debug) {
188                         printk(" %02x", msg->buf[cnt]);
189                         if (!(xmit & BT878_I2C_NOSTOP))
190                                 printk(" >\n");
191                 }
192         }
193         return msg->len;
194
195  eio:
196         retval = -EIO;
197  err:
198         if (i2c_debug)
199                 printk(" ERR: %d\n",retval);
200         return retval;
201 }
202
203 static int
204 bttv_i2c_readbytes(struct bttv *btv, const struct i2c_msg *msg, int last)
205 {
206         u32 xmit;
207         u32 cnt;
208         int retval;
209
210         for(cnt = 0; cnt < msg->len; cnt++) {
211                 xmit = (msg->addr << 25) | (1 << 24) | I2C_HW;
212                 if (cnt < msg->len-1)
213                         xmit |= BT848_I2C_W3B;
214                 if (cnt < msg->len-1 || !last)
215                         xmit |= BT878_I2C_NOSTOP;
216                 if (cnt)
217                         xmit |= BT878_I2C_NOSTART;
218                 btwrite(xmit, BT848_I2C);
219                 retval = bttv_i2c_wait_done(btv);
220                 if (retval < 0)
221                         goto err;
222                 if (retval == 0)
223                         goto eio;
224                 msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff;
225                 if (i2c_debug) {
226                         if (!(xmit & BT878_I2C_NOSTART))
227                                 printk(" <R %02x", (msg->addr << 1) +1);
228                         printk(" =%02x", msg->buf[cnt]);
229                         if (!(xmit & BT878_I2C_NOSTOP))
230                                 printk(" >\n");
231                 }
232         }
233         return msg->len;
234
235  eio:
236         retval = -EIO;
237  err:
238         if (i2c_debug)
239                 printk(" ERR: %d\n",retval);
240         return retval;
241 }
242
243 static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
244 {
245         struct bttv *btv = i2c_get_adapdata(i2c_adap);
246         int retval = 0;
247         int i;
248
249         if (i2c_debug)
250                 printk("bt-i2c:");
251         btwrite(BT848_INT_I2CDONE|BT848_INT_RACK, BT848_INT_STAT);
252         for (i = 0 ; i < num; i++) {
253                 if (msgs[i].flags & I2C_M_RD) {
254                         /* read */
255                         retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num);
256                         if (retval < 0)
257                                 goto err;
258                 } else {
259                         /* write */
260                         retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num);
261                         if (retval < 0)
262                                 goto err;
263                 }
264         }
265         return num;
266
267  err:
268         return retval;
269 }
270
271 static struct i2c_algorithm bttv_algo = {
272         .master_xfer   = bttv_i2c_xfer,
273         .algo_control  = algo_control,
274         .functionality = functionality,
275 };
276
277 static struct i2c_adapter bttv_i2c_adap_hw_template = {
278         .owner         = THIS_MODULE,
279 #ifdef I2C_CLASS_TV_ANALOG
280         .class         = I2C_CLASS_TV_ANALOG,
281 #endif
282         .name          = "bt878",
283         .id            = I2C_HW_B_BT848 /* FIXME */,
284         .algo          = &bttv_algo,
285         .client_register = attach_inform,
286 };
287
288 /* ----------------------------------------------------------------------- */
289 /* I2C functions - common stuff                                            */
290
291 static int attach_inform(struct i2c_client *client)
292 {
293         struct bttv *btv = i2c_get_adapdata(client->adapter);
294
295         if (bttv_debug)
296                 printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n",
297                         btv->c.nr,client->driver->name,client->addr,
298                         client->name);
299         if (!client->driver->command)
300                 return 0;
301
302         if (btv->tuner_type != UNSET) {
303                 struct tuner_setup tun_setup;
304
305                 tun_setup.mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;
306                 tun_setup.type = btv->tuner_type;
307                 tun_setup.addr = ADDR_UNSET;
308
309                 client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
310         }
311
312         if (btv->pinnacle_id != UNSET)
313                 client->driver->command(client,AUDC_CONFIG_PINNACLE,
314                                       &btv->pinnacle_id);
315         return 0;
316 }
317
318 void bttv_call_i2c_clients(struct bttv *btv, unsigned int cmd, void *arg)
319 {
320         if (0 != btv->i2c_rc)
321                 return;
322         i2c_clients_command(&btv->c.i2c_adap, cmd, arg);
323 }
324
325 static struct i2c_client bttv_i2c_client_template = {
326         .name   = "bttv internal",
327 };
328
329
330 /* read I2C */
331 int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for)
332 {
333         unsigned char buffer = 0;
334
335         if (0 != btv->i2c_rc)
336                 return -1;
337         if (bttv_verbose && NULL != probe_for)
338                 printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ",
339                        btv->c.nr,probe_for,addr);
340         btv->i2c_client.addr = addr >> 1;
341         if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) {
342                 if (NULL != probe_for) {
343                         if (bttv_verbose)
344                                 printk("not found\n");
345                 } else
346                         printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n",
347                                btv->c.nr,addr);
348                 return -1;
349         }
350         if (bttv_verbose && NULL != probe_for)
351                 printk("found\n");
352         return buffer;
353 }
354
355 /* write I2C */
356 int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1,
357                     unsigned char b2, int both)
358 {
359         unsigned char buffer[2];
360         int bytes = both ? 2 : 1;
361
362         if (0 != btv->i2c_rc)
363                 return -1;
364         btv->i2c_client.addr = addr >> 1;
365         buffer[0] = b1;
366         buffer[1] = b2;
367         if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes))
368                 return -1;
369         return 0;
370 }
371
372 /* read EEPROM content */
373 void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr)
374 {
375         memset(eedata, 0, 256);
376         if (0 != btv->i2c_rc)
377                 return;
378         btv->i2c_client.addr = addr >> 1;
379         tveeprom_read(&btv->i2c_client, eedata, 256);
380 }
381
382 static char *i2c_devs[128] = {
383         [ 0x1c >> 1 ] = "lgdt330x",
384         [ 0x30 >> 1 ] = "IR (hauppauge)",
385         [ 0x80 >> 1 ] = "msp34xx",
386         [ 0x86 >> 1 ] = "tda9887",
387         [ 0xa0 >> 1 ] = "eeprom",
388         [ 0xc0 >> 1 ] = "tuner (analog)",
389         [ 0xc2 >> 1 ] = "tuner (analog)",
390 };
391
392 static void do_i2c_scan(char *name, struct i2c_client *c)
393 {
394         unsigned char buf;
395         int i,rc;
396
397         for (i = 0; i < 128; i++) {
398                 c->addr = i;
399                 rc = i2c_master_recv(c,&buf,0);
400                 if (rc < 0)
401                         continue;
402                 printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
403                        name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
404         }
405 }
406
407 /* init + register i2c algo-bit adapter */
408 int __devinit init_bttv_i2c(struct bttv *btv)
409 {
410         memcpy(&btv->i2c_client, &bttv_i2c_client_template,
411                sizeof(bttv_i2c_client_template));
412
413         if (i2c_hw)
414                 btv->use_i2c_hw = 1;
415         if (btv->use_i2c_hw) {
416                 /* bt878 */
417                 memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_hw_template,
418                        sizeof(bttv_i2c_adap_hw_template));
419         } else {
420                 /* bt848 */
421                 memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_sw_template,
422                        sizeof(bttv_i2c_adap_sw_template));
423                 memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template,
424                        sizeof(bttv_i2c_algo_bit_template));
425                 btv->i2c_algo.data = btv;
426                 btv->c.i2c_adap.algo_data = &btv->i2c_algo;
427         }
428
429         btv->c.i2c_adap.dev.parent = &btv->c.pci->dev;
430         snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name),
431                  "bt%d #%d [%s]", btv->id, btv->c.nr,
432                  btv->use_i2c_hw ? "hw" : "sw");
433
434         i2c_set_adapdata(&btv->c.i2c_adap, btv);
435         btv->i2c_client.adapter = &btv->c.i2c_adap;
436
437 #ifdef I2C_CLASS_TV_ANALOG
438         if (bttv_tvcards[btv->c.type].no_video)
439                 btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG;
440         if (bttv_tvcards[btv->c.type].has_dvb)
441                 btv->c.i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
442 #endif
443
444         if (btv->use_i2c_hw) {
445                 btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap);
446         } else {
447                 bttv_bit_setscl(btv,1);
448                 bttv_bit_setsda(btv,1);
449                 btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap);
450         }
451         if (0 == btv->i2c_rc && i2c_scan)
452                 do_i2c_scan(btv->c.name,&btv->i2c_client);
453         return btv->i2c_rc;
454 }
455
456 int __devexit fini_bttv_i2c(struct bttv *btv)
457 {
458         if (0 != btv->i2c_rc)
459                 return 0;
460
461         if (btv->use_i2c_hw) {
462                 return i2c_del_adapter(&btv->c.i2c_adap);
463         } else {
464                 return i2c_bit_del_bus(&btv->c.i2c_adap);
465         }
466 }
467
468 /*
469  * Local variables:
470  * c-basic-offset: 8
471  * End:
472  */