diff options
Diffstat (limited to 'drivers/media/dvb/pt1/va1j5jf8007t.c')
| -rw-r--r-- | drivers/media/dvb/pt1/va1j5jf8007t.c | 468 |
1 files changed, 468 insertions, 0 deletions
diff --git a/drivers/media/dvb/pt1/va1j5jf8007t.c b/drivers/media/dvb/pt1/va1j5jf8007t.c new file mode 100644 index 000000000000..71117f4ca7e6 --- /dev/null +++ b/drivers/media/dvb/pt1/va1j5jf8007t.c @@ -0,0 +1,468 @@ +/* + * ISDB-T driver for VA1J5JF8007 + * + * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info> + * + * based on pt1dvr - http://pt1dvr.sourceforge.jp/ + * by Tomoaki Ishikawa <tomy@users.sourceforge.jp> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include "dvb_frontend.h" +#include "dvb_math.h" +#include "va1j5jf8007t.h" + +enum va1j5jf8007t_tune_state { + VA1J5JF8007T_IDLE, + VA1J5JF8007T_SET_FREQUENCY, + VA1J5JF8007T_CHECK_FREQUENCY, + VA1J5JF8007T_SET_MODULATION, + VA1J5JF8007T_CHECK_MODULATION, + VA1J5JF8007T_TRACK, + VA1J5JF8007T_ABORT, +}; + +struct va1j5jf8007t_state { + const struct va1j5jf8007t_config *config; + struct i2c_adapter *adap; + struct dvb_frontend fe; + enum va1j5jf8007t_tune_state tune_state; +}; + +static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe) +{ + return DVBFE_ALGO_HW; +} + +static int +va1j5jf8007t_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct va1j5jf8007t_state *state; + + state = fe->demodulator_priv; + + switch (state->tune_state) { + case VA1J5JF8007T_IDLE: + case VA1J5JF8007T_SET_FREQUENCY: + case VA1J5JF8007T_CHECK_FREQUENCY: + *status = 0; + return 0; + + + case VA1J5JF8007T_SET_MODULATION: + case VA1J5JF8007T_CHECK_MODULATION: + case VA1J5JF8007T_ABORT: + *status |= FE_HAS_SIGNAL; + return 0; + + case VA1J5JF8007T_TRACK: + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK; + return 0; + } + + BUG(); +} + +struct va1j5jf8007t_cb_map { + u32 frequency; + u8 cb; +}; + +static const struct va1j5jf8007t_cb_map va1j5jf8007t_cb_maps[] = { + { 90000000, 0x80 }, + { 140000000, 0x81 }, + { 170000000, 0xa1 }, + { 220000000, 0x62 }, + { 330000000, 0xa2 }, + { 402000000, 0xe2 }, + { 450000000, 0x64 }, + { 550000000, 0x84 }, + { 600000000, 0xa4 }, + { 700000000, 0xc4 }, +}; + +static u8 va1j5jf8007t_lookup_cb(u32 frequency) +{ + int i; + const struct va1j5jf8007t_cb_map *map; + + for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_cb_maps); i++) { + map = &va1j5jf8007t_cb_maps[i]; + if (frequency < map->frequency) + return map->cb; + } + return 0xe4; +} + +static int va1j5jf8007t_set_frequency(struct va1j5jf8007t_state *state) +{ + u32 frequency; + u16 word; + u8 buf[6]; + struct i2c_msg msg; + + frequency = state->fe.dtv_property_cache.frequency; + + word = (frequency + 71428) / 142857 + 399; + buf[0] = 0xfe; + buf[1] = 0xc2; + buf[2] = word >> 8; + buf[3] = word; + buf[4] = 0x80; + buf[5] = va1j5jf8007t_lookup_cb(frequency); + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + if (i2c_transfer(state->adap, &msg, 1) != 1) + return -EREMOTEIO; + + return 0; +} + +static int +va1j5jf8007t_check_frequency(struct va1j5jf8007t_state *state, int *lock) +{ + u8 addr; + u8 write_buf[2], read_buf[1]; + struct i2c_msg msgs[2]; + + addr = state->config->demod_address; + + write_buf[0] = 0xfe; + write_buf[1] = 0xc3; + + msgs[0].addr = addr; + msgs[0].flags = 0; + msgs[0].len = sizeof(write_buf); + msgs[0].buf = write_buf; + + msgs[1].addr = addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = sizeof(read_buf); + msgs[1].buf = read_buf; + + if (i2c_transfer(state->adap, msgs, 2) != 2) + return -EREMOTEIO; + + *lock = read_buf[0] & 0x40; + return 0; +} + +static int va1j5jf8007t_set_modulation(struct va1j5jf8007t_state *state) +{ + u8 buf[2]; + struct i2c_msg msg; + + buf[0] = 0x01; + buf[1] = 0x40; + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + if (i2c_transfer(state->adap, &msg, 1) != 1) + return -EREMOTEIO; + + return 0; +} + +static int va1j5jf8007t_check_modulation(struct va1j5jf8007t_state *state, + int *lock, int *retry) +{ + u8 addr; + u8 write_buf[1], read_buf[1]; + struct i2c_msg msgs[2]; + + addr = state->config->demod_address; + + write_buf[0] = 0x80; + + msgs[0].addr = addr; + msgs[0].flags = 0; + msgs[0].len = sizeof(write_buf); + msgs[0].buf = write_buf; + + msgs[1].addr = addr; + msgs[1].flags = I2C_M_RD; + msgs[1].len = sizeof(read_buf); + msgs[1].buf = read_buf; + + if (i2c_transfer(state->adap, msgs, 2) != 2) + return -EREMOTEIO; + + *lock = !(read_buf[0] & 0x10); + *retry = read_buf[0] & 0x80; + return 0; +} + +static int +va1j5jf8007t_tune(struct dvb_frontend *fe, + struct dvb_frontend_parameters *params, + unsigned int mode_flags, unsigned int *delay, + fe_status_t *status) +{ + struct va1j5jf8007t_state *state; + int ret; + int lock, retry; + + state = fe->demodulator_priv; + + if (params != NULL) + state->tune_state = VA1J5JF8007T_SET_FREQUENCY; + + switch (state->tune_state) { + case VA1J5JF8007T_IDLE: + *delay = 3 * HZ; + *status = 0; + return 0; + + case VA1J5JF8007T_SET_FREQUENCY: + ret = va1j5jf8007t_set_frequency(state); + if (ret < 0) + return ret; + + state->tune_state = VA1J5JF8007T_CHECK_FREQUENCY; + *delay = 0; + *status = 0; + return 0; + + case VA1J5JF8007T_CHECK_FREQUENCY: + ret = va1j5jf8007t_check_frequency(state, &lock); + if (ret < 0) + return ret; + + if (!lock) { + *delay = (HZ + 999) / 1000; + *status = 0; + return 0; + } + + state->tune_state = VA1J5JF8007T_SET_MODULATION; + *delay = 0; + *status = FE_HAS_SIGNAL; + return 0; + + case VA1J5JF8007T_SET_MODULATION: + ret = va1j5jf8007t_set_modulation(state); + if (ret < 0) + return ret; + + state->tune_state = VA1J5JF8007T_CHECK_MODULATION; + *delay = 0; + *status = FE_HAS_SIGNAL; + return 0; + + case VA1J5JF8007T_CHECK_MODULATION: + ret = va1j5jf8007t_check_modulation(state, &lock, &retry); + if (ret < 0) + return ret; + + if (!lock) { + if (!retry) { + state->tune_state = VA1J5JF8007T_ABORT; + *delay = 3 * HZ; + *status = FE_HAS_SIGNAL; + return 0; + } + *delay = (HZ + 999) / 1000; + *status = FE_HAS_SIGNAL; + return 0; + } + + state->tune_state = VA1J5JF8007T_TRACK; + /* fall through */ + + case VA1J5JF8007T_TRACK: + *delay = 3 * HZ; + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK; + return 0; + + case VA1J5JF8007T_ABORT: + *delay = 3 * HZ; + *status = FE_HAS_SIGNAL; + return 0; + } + + BUG(); +} + +static int va1j5jf8007t_init_frequency(struct va1j5jf8007t_state *state) +{ + u8 buf[7]; + struct i2c_msg msg; + + buf[0] = 0xfe; + buf[1] = 0xc2; + buf[2] = 0x01; + buf[3] = 0x8f; + buf[4] = 0xc1; + buf[5] = 0x80; + buf[6] = 0x80; + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + if (i2c_transfer(state->adap, &msg, 1) != 1) + return -EREMOTEIO; + + return 0; +} + +static int va1j5jf8007t_set_sleep(struct va1j5jf8007t_state *state, int sleep) +{ + u8 buf[2]; + struct i2c_msg msg; + + buf[0] = 0x03; + buf[1] = sleep ? 0x90 : 0x80; + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + if (i2c_transfer(state->adap, &msg, 1) != 1) + return -EREMOTEIO; + + return 0; +} + +static int va1j5jf8007t_sleep(struct dvb_frontend *fe) +{ + struct va1j5jf8007t_state *state; + int ret; + + state = fe->demodulator_priv; + + ret = va1j5jf8007t_init_frequency(state); + if (ret < 0) + return ret; + + return va1j5jf8007t_set_sleep(state, 1); +} + +static int va1j5jf8007t_init(struct dvb_frontend *fe) +{ + struct va1j5jf8007t_state *state; + + state = fe->demodulator_priv; + state->tune_state = VA1J5JF8007T_IDLE; + + return va1j5jf8007t_set_sleep(state, 0); +} + +static void va1j5jf8007t_release(struct dvb_frontend *fe) +{ + struct va1j5jf8007t_state *state; + state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops va1j5jf8007t_ops = { + .info = { + .name = "VA1J5JF8007 ISDB-T", + .type = FE_OFDM, + .frequency_min = 90000000, + .frequency_max = 770000000, + .frequency_stepsize = 142857, + .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO | + FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO, + }, + + .get_frontend_algo = va1j5jf8007t_get_frontend_algo, + .read_status = va1j5jf8007t_read_status, + .tune = va1j5jf8007t_tune, + .sleep = va1j5jf8007t_sleep, + .init = va1j5jf8007t_init, + .release = va1j5jf8007t_release, +}; + +static const u8 va1j5jf8007t_prepare_bufs[][2] = { + {0x03, 0x90}, {0x14, 0x8f}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2}, + {0x22, 0x83}, {0x31, 0x0d}, {0x32, 0xe0}, {0x39, 0xd3}, {0x3a, 0x00}, + {0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x02}, {0x76, 0x4e}, {0x77, 0x03}, + {0xef, 0x01} +}; + +int va1j5jf8007t_prepare(struct dvb_frontend *fe) +{ + struct va1j5jf8007t_state *state; + u8 buf[2]; + struct i2c_msg msg; + int i; + + state = fe->demodulator_priv; + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_prepare_bufs); i++) { + memcpy(buf, va1j5jf8007t_prepare_bufs[i], sizeof(buf)); + if (i2c_transfer(state->adap, &msg, 1) != 1) + return -EREMOTEIO; + } + + return va1j5jf8007t_init_frequency(state); +} + +struct dvb_frontend * +va1j5jf8007t_attach(const struct va1j5jf8007t_config *config, + struct i2c_adapter *adap) +{ + struct va1j5jf8007t_state *state; + struct dvb_frontend *fe; + u8 buf[2]; + struct i2c_msg msg; + + state = kzalloc(sizeof(struct va1j5jf8007t_state), GFP_KERNEL); + if (!state) + return NULL; + + state->config = config; + state->adap = adap; + + fe = &state->fe; + memcpy(&fe->ops, &va1j5jf8007t_ops, sizeof(struct dvb_frontend_ops)); + fe->demodulator_priv = state; + + buf[0] = 0x01; + buf[1] = 0x80; + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.len = sizeof(buf); + msg.buf = buf; + + if (i2c_transfer(state->adap, &msg, 1) != 1) { + kfree(state); + return NULL; + } + + return fe; +} |
