2 * ISDB-T driver for VA1J5JF8007/VA1J5JF8011
4 * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
6 * based on pt1dvr - http://pt1dvr.sourceforge.jp/
7 * by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
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.
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.
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.
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"
30 #include "va1j5jf8007t.h"
32 enum va1j5jf8007t_tune_state {
34 VA1J5JF8007T_SET_FREQUENCY,
35 VA1J5JF8007T_CHECK_FREQUENCY,
36 VA1J5JF8007T_SET_MODULATION,
37 VA1J5JF8007T_CHECK_MODULATION,
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;
49 static int va1j5jf8007t_read_snr(struct dvb_frontend *fe, u16 *snr)
51 struct va1j5jf8007t_state *state;
54 u8 write_buf[1], read_buf[1];
55 struct i2c_msg msgs[2];
58 state = fe->demodulator_priv;
59 addr = state->config->demod_address;
62 for (i = 0; i < 3; i++) {
63 write_buf[0] = 0x8b + i;
67 msgs[0].len = sizeof(write_buf);
68 msgs[0].buf = write_buf;
71 msgs[1].flags = I2C_M_RD;
72 msgs[1].len = sizeof(read_buf);
73 msgs[1].buf = read_buf;
75 if (i2c_transfer(state->adap, msgs, 2) != 2)
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;
95 static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
101 va1j5jf8007t_read_status(struct dvb_frontend *fe, fe_status_t *status)
103 struct va1j5jf8007t_state *state;
105 state = fe->demodulator_priv;
107 switch (state->tune_state) {
108 case VA1J5JF8007T_IDLE:
109 case VA1J5JF8007T_SET_FREQUENCY:
110 case VA1J5JF8007T_CHECK_FREQUENCY:
115 case VA1J5JF8007T_SET_MODULATION:
116 case VA1J5JF8007T_CHECK_MODULATION:
117 case VA1J5JF8007T_ABORT:
118 *status |= FE_HAS_SIGNAL;
121 case VA1J5JF8007T_TRACK:
122 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
129 struct va1j5jf8007t_cb_map {
134 static const struct va1j5jf8007t_cb_map va1j5jf8007t_cb_maps[] = {
147 static u8 va1j5jf8007t_lookup_cb(u32 frequency)
150 const struct va1j5jf8007t_cb_map *map;
152 for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_cb_maps); i++) {
153 map = &va1j5jf8007t_cb_maps[i];
154 if (frequency < map->frequency)
160 static int va1j5jf8007t_set_frequency(struct va1j5jf8007t_state *state)
167 frequency = state->fe.dtv_property_cache.frequency;
169 word = (frequency + 71428) / 142857 + 399;
175 buf[5] = va1j5jf8007t_lookup_cb(frequency);
177 msg.addr = state->config->demod_address;
179 msg.len = sizeof(buf);
182 if (i2c_transfer(state->adap, &msg, 1) != 1)
189 va1j5jf8007t_check_frequency(struct va1j5jf8007t_state *state, int *lock)
192 u8 write_buf[2], read_buf[1];
193 struct i2c_msg msgs[2];
195 addr = state->config->demod_address;
202 msgs[0].len = sizeof(write_buf);
203 msgs[0].buf = write_buf;
206 msgs[1].flags = I2C_M_RD;
207 msgs[1].len = sizeof(read_buf);
208 msgs[1].buf = read_buf;
210 if (i2c_transfer(state->adap, msgs, 2) != 2)
213 *lock = read_buf[0] & 0x40;
217 static int va1j5jf8007t_set_modulation(struct va1j5jf8007t_state *state)
225 msg.addr = state->config->demod_address;
227 msg.len = sizeof(buf);
230 if (i2c_transfer(state->adap, &msg, 1) != 1)
236 static int va1j5jf8007t_check_modulation(struct va1j5jf8007t_state *state,
237 int *lock, int *retry)
240 u8 write_buf[1], read_buf[1];
241 struct i2c_msg msgs[2];
243 addr = state->config->demod_address;
249 msgs[0].len = sizeof(write_buf);
250 msgs[0].buf = write_buf;
253 msgs[1].flags = I2C_M_RD;
254 msgs[1].len = sizeof(read_buf);
255 msgs[1].buf = read_buf;
257 if (i2c_transfer(state->adap, msgs, 2) != 2)
260 *lock = !(read_buf[0] & 0x10);
261 *retry = read_buf[0] & 0x80;
266 va1j5jf8007t_tune(struct dvb_frontend *fe,
268 unsigned int mode_flags, unsigned int *delay,
271 struct va1j5jf8007t_state *state;
273 int lock = 0, retry = 0;
275 state = fe->demodulator_priv;
278 state->tune_state = VA1J5JF8007T_SET_FREQUENCY;
280 switch (state->tune_state) {
281 case VA1J5JF8007T_IDLE:
286 case VA1J5JF8007T_SET_FREQUENCY:
287 ret = va1j5jf8007t_set_frequency(state);
291 state->tune_state = VA1J5JF8007T_CHECK_FREQUENCY;
296 case VA1J5JF8007T_CHECK_FREQUENCY:
297 ret = va1j5jf8007t_check_frequency(state, &lock);
302 *delay = (HZ + 999) / 1000;
307 state->tune_state = VA1J5JF8007T_SET_MODULATION;
309 *status = FE_HAS_SIGNAL;
312 case VA1J5JF8007T_SET_MODULATION:
313 ret = va1j5jf8007t_set_modulation(state);
317 state->tune_state = VA1J5JF8007T_CHECK_MODULATION;
319 *status = FE_HAS_SIGNAL;
322 case VA1J5JF8007T_CHECK_MODULATION:
323 ret = va1j5jf8007t_check_modulation(state, &lock, &retry);
329 state->tune_state = VA1J5JF8007T_ABORT;
331 *status = FE_HAS_SIGNAL;
334 *delay = (HZ + 999) / 1000;
335 *status = FE_HAS_SIGNAL;
339 state->tune_state = VA1J5JF8007T_TRACK;
342 case VA1J5JF8007T_TRACK:
344 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
347 case VA1J5JF8007T_ABORT:
349 *status = FE_HAS_SIGNAL;
356 static int va1j5jf8007t_init_frequency(struct va1j5jf8007t_state *state)
369 msg.addr = state->config->demod_address;
371 msg.len = sizeof(buf);
374 if (i2c_transfer(state->adap, &msg, 1) != 1)
380 static int va1j5jf8007t_set_sleep(struct va1j5jf8007t_state *state, int sleep)
386 buf[1] = sleep ? 0x90 : 0x80;
388 msg.addr = state->config->demod_address;
390 msg.len = sizeof(buf);
393 if (i2c_transfer(state->adap, &msg, 1) != 1)
399 static int va1j5jf8007t_sleep(struct dvb_frontend *fe)
401 struct va1j5jf8007t_state *state;
404 state = fe->demodulator_priv;
406 ret = va1j5jf8007t_init_frequency(state);
410 return va1j5jf8007t_set_sleep(state, 1);
413 static int va1j5jf8007t_init(struct dvb_frontend *fe)
415 struct va1j5jf8007t_state *state;
417 state = fe->demodulator_priv;
418 state->tune_state = VA1J5JF8007T_IDLE;
420 return va1j5jf8007t_set_sleep(state, 0);
423 static void va1j5jf8007t_release(struct dvb_frontend *fe)
425 struct va1j5jf8007t_state *state;
426 state = fe->demodulator_priv;
430 static struct dvb_frontend_ops va1j5jf8007t_ops = {
431 .delsys = { SYS_ISDBT },
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,
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,
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},
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}
464 int va1j5jf8007t_prepare(struct dvb_frontend *fe)
466 struct va1j5jf8007t_state *state;
473 state = fe->demodulator_priv;
475 switch (state->config->frequency) {
476 case VA1J5JF8007T_20MHZ:
477 bufs = va1j5jf8007t_20mhz_prepare_bufs;
478 size = ARRAY_SIZE(va1j5jf8007t_20mhz_prepare_bufs);
480 case VA1J5JF8007T_25MHZ:
481 bufs = va1j5jf8007t_25mhz_prepare_bufs;
482 size = ARRAY_SIZE(va1j5jf8007t_25mhz_prepare_bufs);
488 msg.addr = state->config->demod_address;
490 msg.len = sizeof(buf);
493 for (i = 0; i < size; i++) {
494 memcpy(buf, bufs[i], sizeof(buf));
495 if (i2c_transfer(state->adap, &msg, 1) != 1)
499 return va1j5jf8007t_init_frequency(state);
502 struct dvb_frontend *
503 va1j5jf8007t_attach(const struct va1j5jf8007t_config *config,
504 struct i2c_adapter *adap)
506 struct va1j5jf8007t_state *state;
507 struct dvb_frontend *fe;
511 state = kzalloc(sizeof(struct va1j5jf8007t_state), GFP_KERNEL);
515 state->config = config;
519 memcpy(&fe->ops, &va1j5jf8007t_ops, sizeof(struct dvb_frontend_ops));
520 fe->demodulator_priv = state;
525 msg.addr = state->config->demod_address;
527 msg.len = sizeof(buf);
530 if (i2c_transfer(state->adap, &msg, 1) != 1) {