Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[linux-2.6.git] / drivers / media / dvb / pt1 / va1j5jf8007t.c
1 /*
2  * ISDB-T driver for VA1J5JF8007/VA1J5JF8011
3  *
4  * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
5  *
6  * based on pt1dvr - http://pt1dvr.sourceforge.jp/
7  *      by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22  */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/slab.h>
27 #include <linux/i2c.h>
28 #include "dvb_frontend.h"
29 #include "dvb_math.h"
30 #include "va1j5jf8007t.h"
31
32 enum va1j5jf8007t_tune_state {
33         VA1J5JF8007T_IDLE,
34         VA1J5JF8007T_SET_FREQUENCY,
35         VA1J5JF8007T_CHECK_FREQUENCY,
36         VA1J5JF8007T_SET_MODULATION,
37         VA1J5JF8007T_CHECK_MODULATION,
38         VA1J5JF8007T_TRACK,
39         VA1J5JF8007T_ABORT,
40 };
41
42 struct va1j5jf8007t_state {
43         const struct va1j5jf8007t_config *config;
44         struct i2c_adapter *adap;
45         struct dvb_frontend fe;
46         enum va1j5jf8007t_tune_state tune_state;
47 };
48
49 static int va1j5jf8007t_read_snr(struct dvb_frontend *fe, u16 *snr)
50 {
51         struct va1j5jf8007t_state *state;
52         u8 addr;
53         int i;
54         u8 write_buf[1], read_buf[1];
55         struct i2c_msg msgs[2];
56         s32 word, x, y;
57
58         state = fe->demodulator_priv;
59         addr = state->config->demod_address;
60
61         word = 0;
62         for (i = 0; i < 3; i++) {
63                 write_buf[0] = 0x8b + i;
64
65                 msgs[0].addr = addr;
66                 msgs[0].flags = 0;
67                 msgs[0].len = sizeof(write_buf);
68                 msgs[0].buf = write_buf;
69
70                 msgs[1].addr = addr;
71                 msgs[1].flags = I2C_M_RD;
72                 msgs[1].len = sizeof(read_buf);
73                 msgs[1].buf = read_buf;
74
75                 if (i2c_transfer(state->adap, msgs, 2) != 2)
76                         return -EREMOTEIO;
77
78                 word <<= 8;
79                 word |= read_buf[0];
80         }
81
82         if (!word)
83                 return -EIO;
84
85         x = 10 * (intlog10(0x540000 * 100 / word) - (2 << 24));
86         y = (24ll << 46) / 1000000;
87         y = ((s64)y * x >> 30) - (16ll << 40) / 10000;
88         y = ((s64)y * x >> 29) + (398ll << 35) / 10000;
89         y = ((s64)y * x >> 30) + (5491ll << 29) / 10000;
90         y = ((s64)y * x >> 30) + (30965ll << 23) / 10000;
91         *snr = y >> 15;
92         return 0;
93 }
94
95 static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
96 {
97         return DVBFE_ALGO_HW;
98 }
99
100 static int
101 va1j5jf8007t_read_status(struct dvb_frontend *fe, fe_status_t *status)
102 {
103         struct va1j5jf8007t_state *state;
104
105         state = fe->demodulator_priv;
106
107         switch (state->tune_state) {
108         case VA1J5JF8007T_IDLE:
109         case VA1J5JF8007T_SET_FREQUENCY:
110         case VA1J5JF8007T_CHECK_FREQUENCY:
111                 *status = 0;
112                 return 0;
113
114
115         case VA1J5JF8007T_SET_MODULATION:
116         case VA1J5JF8007T_CHECK_MODULATION:
117         case VA1J5JF8007T_ABORT:
118                 *status |= FE_HAS_SIGNAL;
119                 return 0;
120
121         case VA1J5JF8007T_TRACK:
122                 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
123                 return 0;
124         }
125
126         BUG();
127 }
128
129 struct va1j5jf8007t_cb_map {
130         u32 frequency;
131         u8 cb;
132 };
133
134 static const struct va1j5jf8007t_cb_map va1j5jf8007t_cb_maps[] = {
135         {  90000000, 0x80 },
136         { 140000000, 0x81 },
137         { 170000000, 0xa1 },
138         { 220000000, 0x62 },
139         { 330000000, 0xa2 },
140         { 402000000, 0xe2 },
141         { 450000000, 0x64 },
142         { 550000000, 0x84 },
143         { 600000000, 0xa4 },
144         { 700000000, 0xc4 },
145 };
146
147 static u8 va1j5jf8007t_lookup_cb(u32 frequency)
148 {
149         int i;
150         const struct va1j5jf8007t_cb_map *map;
151
152         for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_cb_maps); i++) {
153                 map = &va1j5jf8007t_cb_maps[i];
154                 if (frequency < map->frequency)
155                         return map->cb;
156         }
157         return 0xe4;
158 }
159
160 static int va1j5jf8007t_set_frequency(struct va1j5jf8007t_state *state)
161 {
162         u32 frequency;
163         u16 word;
164         u8 buf[6];
165         struct i2c_msg msg;
166
167         frequency = state->fe.dtv_property_cache.frequency;
168
169         word = (frequency + 71428) / 142857 + 399;
170         buf[0] = 0xfe;
171         buf[1] = 0xc2;
172         buf[2] = word >> 8;
173         buf[3] = word;
174         buf[4] = 0x80;
175         buf[5] = va1j5jf8007t_lookup_cb(frequency);
176
177         msg.addr = state->config->demod_address;
178         msg.flags = 0;
179         msg.len = sizeof(buf);
180         msg.buf = buf;
181
182         if (i2c_transfer(state->adap, &msg, 1) != 1)
183                 return -EREMOTEIO;
184
185         return 0;
186 }
187
188 static int
189 va1j5jf8007t_check_frequency(struct va1j5jf8007t_state *state, int *lock)
190 {
191         u8 addr;
192         u8 write_buf[2], read_buf[1];
193         struct i2c_msg msgs[2];
194
195         addr = state->config->demod_address;
196
197         write_buf[0] = 0xfe;
198         write_buf[1] = 0xc3;
199
200         msgs[0].addr = addr;
201         msgs[0].flags = 0;
202         msgs[0].len = sizeof(write_buf);
203         msgs[0].buf = write_buf;
204
205         msgs[1].addr = addr;
206         msgs[1].flags = I2C_M_RD;
207         msgs[1].len = sizeof(read_buf);
208         msgs[1].buf = read_buf;
209
210         if (i2c_transfer(state->adap, msgs, 2) != 2)
211                 return -EREMOTEIO;
212
213         *lock = read_buf[0] & 0x40;
214         return 0;
215 }
216
217 static int va1j5jf8007t_set_modulation(struct va1j5jf8007t_state *state)
218 {
219         u8 buf[2];
220         struct i2c_msg msg;
221
222         buf[0] = 0x01;
223         buf[1] = 0x40;
224
225         msg.addr = state->config->demod_address;
226         msg.flags = 0;
227         msg.len = sizeof(buf);
228         msg.buf = buf;
229
230         if (i2c_transfer(state->adap, &msg, 1) != 1)
231                 return -EREMOTEIO;
232
233         return 0;
234 }
235
236 static int va1j5jf8007t_check_modulation(struct va1j5jf8007t_state *state,
237                                          int *lock, int *retry)
238 {
239         u8 addr;
240         u8 write_buf[1], read_buf[1];
241         struct i2c_msg msgs[2];
242
243         addr = state->config->demod_address;
244
245         write_buf[0] = 0x80;
246
247         msgs[0].addr = addr;
248         msgs[0].flags = 0;
249         msgs[0].len = sizeof(write_buf);
250         msgs[0].buf = write_buf;
251
252         msgs[1].addr = addr;
253         msgs[1].flags = I2C_M_RD;
254         msgs[1].len = sizeof(read_buf);
255         msgs[1].buf = read_buf;
256
257         if (i2c_transfer(state->adap, msgs, 2) != 2)
258                 return -EREMOTEIO;
259
260         *lock = !(read_buf[0] & 0x10);
261         *retry = read_buf[0] & 0x80;
262         return 0;
263 }
264
265 static int
266 va1j5jf8007t_tune(struct dvb_frontend *fe,
267                   bool re_tune,
268                   unsigned int mode_flags,  unsigned int *delay,
269                   fe_status_t *status)
270 {
271         struct va1j5jf8007t_state *state;
272         int ret;
273         int lock = 0, retry = 0;
274
275         state = fe->demodulator_priv;
276
277         if (re_tune)
278                 state->tune_state = VA1J5JF8007T_SET_FREQUENCY;
279
280         switch (state->tune_state) {
281         case VA1J5JF8007T_IDLE:
282                 *delay = 3 * HZ;
283                 *status = 0;
284                 return 0;
285
286         case VA1J5JF8007T_SET_FREQUENCY:
287                 ret = va1j5jf8007t_set_frequency(state);
288                 if (ret < 0)
289                         return ret;
290
291                 state->tune_state = VA1J5JF8007T_CHECK_FREQUENCY;
292                 *delay = 0;
293                 *status = 0;
294                 return 0;
295
296         case VA1J5JF8007T_CHECK_FREQUENCY:
297                 ret = va1j5jf8007t_check_frequency(state, &lock);
298                 if (ret < 0)
299                         return ret;
300
301                 if (!lock)  {
302                         *delay = (HZ + 999) / 1000;
303                         *status = 0;
304                         return 0;
305                 }
306
307                 state->tune_state = VA1J5JF8007T_SET_MODULATION;
308                 *delay = 0;
309                 *status = FE_HAS_SIGNAL;
310                 return 0;
311
312         case VA1J5JF8007T_SET_MODULATION:
313                 ret = va1j5jf8007t_set_modulation(state);
314                 if (ret < 0)
315                         return ret;
316
317                 state->tune_state = VA1J5JF8007T_CHECK_MODULATION;
318                 *delay = 0;
319                 *status = FE_HAS_SIGNAL;
320                 return 0;
321
322         case VA1J5JF8007T_CHECK_MODULATION:
323                 ret = va1j5jf8007t_check_modulation(state, &lock, &retry);
324                 if (ret < 0)
325                         return ret;
326
327                 if (!lock)  {
328                         if (!retry)  {
329                                 state->tune_state = VA1J5JF8007T_ABORT;
330                                 *delay = 3 * HZ;
331                                 *status = FE_HAS_SIGNAL;
332                                 return 0;
333                         }
334                         *delay = (HZ + 999) / 1000;
335                         *status = FE_HAS_SIGNAL;
336                         return 0;
337                 }
338
339                 state->tune_state = VA1J5JF8007T_TRACK;
340                 /* fall through */
341
342         case VA1J5JF8007T_TRACK:
343                 *delay = 3 * HZ;
344                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
345                 return 0;
346
347         case VA1J5JF8007T_ABORT:
348                 *delay = 3 * HZ;
349                 *status = FE_HAS_SIGNAL;
350                 return 0;
351         }
352
353         BUG();
354 }
355
356 static int va1j5jf8007t_init_frequency(struct va1j5jf8007t_state *state)
357 {
358         u8 buf[7];
359         struct i2c_msg msg;
360
361         buf[0] = 0xfe;
362         buf[1] = 0xc2;
363         buf[2] = 0x01;
364         buf[3] = 0x8f;
365         buf[4] = 0xc1;
366         buf[5] = 0x80;
367         buf[6] = 0x80;
368
369         msg.addr = state->config->demod_address;
370         msg.flags = 0;
371         msg.len = sizeof(buf);
372         msg.buf = buf;
373
374         if (i2c_transfer(state->adap, &msg, 1) != 1)
375                 return -EREMOTEIO;
376
377         return 0;
378 }
379
380 static int va1j5jf8007t_set_sleep(struct va1j5jf8007t_state *state, int sleep)
381 {
382         u8 buf[2];
383         struct i2c_msg msg;
384
385         buf[0] = 0x03;
386         buf[1] = sleep ? 0x90 : 0x80;
387
388         msg.addr = state->config->demod_address;
389         msg.flags = 0;
390         msg.len = sizeof(buf);
391         msg.buf = buf;
392
393         if (i2c_transfer(state->adap, &msg, 1) != 1)
394                 return -EREMOTEIO;
395
396         return 0;
397 }
398
399 static int va1j5jf8007t_sleep(struct dvb_frontend *fe)
400 {
401         struct va1j5jf8007t_state *state;
402         int ret;
403
404         state = fe->demodulator_priv;
405
406         ret = va1j5jf8007t_init_frequency(state);
407         if (ret < 0)
408                 return ret;
409
410         return va1j5jf8007t_set_sleep(state, 1);
411 }
412
413 static int va1j5jf8007t_init(struct dvb_frontend *fe)
414 {
415         struct va1j5jf8007t_state *state;
416
417         state = fe->demodulator_priv;
418         state->tune_state = VA1J5JF8007T_IDLE;
419
420         return va1j5jf8007t_set_sleep(state, 0);
421 }
422
423 static void va1j5jf8007t_release(struct dvb_frontend *fe)
424 {
425         struct va1j5jf8007t_state *state;
426         state = fe->demodulator_priv;
427         kfree(state);
428 }
429
430 static struct dvb_frontend_ops va1j5jf8007t_ops = {
431         .delsys = { SYS_ISDBT },
432         .info = {
433                 .name = "VA1J5JF8007/VA1J5JF8011 ISDB-T",
434                 .frequency_min = 90000000,
435                 .frequency_max = 770000000,
436                 .frequency_stepsize = 142857,
437                 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
438                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
439                         FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
440         },
441
442         .read_snr = va1j5jf8007t_read_snr,
443         .get_frontend_algo = va1j5jf8007t_get_frontend_algo,
444         .read_status = va1j5jf8007t_read_status,
445         .tune = va1j5jf8007t_tune,
446         .sleep = va1j5jf8007t_sleep,
447         .init = va1j5jf8007t_init,
448         .release = va1j5jf8007t_release,
449 };
450
451 static const u8 va1j5jf8007t_20mhz_prepare_bufs[][2] = {
452         {0x03, 0x90}, {0x14, 0x8f}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2},
453         {0x22, 0x83}, {0x31, 0x0d}, {0x32, 0xe0}, {0x39, 0xd3}, {0x3a, 0x00},
454         {0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x02}, {0x76, 0x4e}, {0x77, 0x03},
455         {0xef, 0x01}
456 };
457
458 static const u8 va1j5jf8007t_25mhz_prepare_bufs[][2] = {
459         {0x03, 0x90}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2}, {0x22, 0x83},
460         {0x3a, 0x00}, {0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x0a}, {0x76, 0x4c},
461         {0x77, 0x03}, {0xef, 0x01}
462 };
463
464 int va1j5jf8007t_prepare(struct dvb_frontend *fe)
465 {
466         struct va1j5jf8007t_state *state;
467         const u8 (*bufs)[2];
468         int size;
469         u8 buf[2];
470         struct i2c_msg msg;
471         int i;
472
473         state = fe->demodulator_priv;
474
475         switch (state->config->frequency) {
476         case VA1J5JF8007T_20MHZ:
477                 bufs = va1j5jf8007t_20mhz_prepare_bufs;
478                 size = ARRAY_SIZE(va1j5jf8007t_20mhz_prepare_bufs);
479                 break;
480         case VA1J5JF8007T_25MHZ:
481                 bufs = va1j5jf8007t_25mhz_prepare_bufs;
482                 size = ARRAY_SIZE(va1j5jf8007t_25mhz_prepare_bufs);
483                 break;
484         default:
485                 return -EINVAL;
486         }
487
488         msg.addr = state->config->demod_address;
489         msg.flags = 0;
490         msg.len = sizeof(buf);
491         msg.buf = buf;
492
493         for (i = 0; i < size; i++) {
494                 memcpy(buf, bufs[i], sizeof(buf));
495                 if (i2c_transfer(state->adap, &msg, 1) != 1)
496                         return -EREMOTEIO;
497         }
498
499         return va1j5jf8007t_init_frequency(state);
500 }
501
502 struct dvb_frontend *
503 va1j5jf8007t_attach(const struct va1j5jf8007t_config *config,
504                     struct i2c_adapter *adap)
505 {
506         struct va1j5jf8007t_state *state;
507         struct dvb_frontend *fe;
508         u8 buf[2];
509         struct i2c_msg msg;
510
511         state = kzalloc(sizeof(struct va1j5jf8007t_state), GFP_KERNEL);
512         if (!state)
513                 return NULL;
514
515         state->config = config;
516         state->adap = adap;
517
518         fe = &state->fe;
519         memcpy(&fe->ops, &va1j5jf8007t_ops, sizeof(struct dvb_frontend_ops));
520         fe->demodulator_priv = state;
521
522         buf[0] = 0x01;
523         buf[1] = 0x80;
524
525         msg.addr = state->config->demod_address;
526         msg.flags = 0;
527         msg.len = sizeof(buf);
528         msg.buf = buf;
529
530         if (i2c_transfer(state->adap, &msg, 1) != 1) {
531                 kfree(state);
532                 return NULL;
533         }
534
535         return fe;
536 }