diff options
Diffstat (limited to 'drivers/media/dvb-frontends/rtl2830.c')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2830.c | 930 |
1 files changed, 930 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c new file mode 100644 index 000000000..e1b8df62b --- /dev/null +++ b/drivers/media/dvb-frontends/rtl2830.c @@ -0,0 +1,930 @@ +/* + * Realtek RTL2830 DVB-T demodulator driver + * + * Copyright (C) 2011 Antti Palosaari <crope@iki.fi> + * + * 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. + * + */ + +#include "rtl2830_priv.h" + +/* Our regmap is bypassing I2C adapter lock, thus we do it! */ +static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg, + const void *val, size_t val_count) +{ + struct rtl2830_dev *dev = i2c_get_clientdata(client); + int ret; + + i2c_lock_adapter(client->adapter); + ret = regmap_bulk_write(dev->regmap, reg, val, val_count); + i2c_unlock_adapter(client->adapter); + return ret; +} + +static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg, + unsigned int mask, unsigned int val) +{ + struct rtl2830_dev *dev = i2c_get_clientdata(client); + int ret; + + i2c_lock_adapter(client->adapter); + ret = regmap_update_bits(dev->regmap, reg, mask, val); + i2c_unlock_adapter(client->adapter); + return ret; +} + +static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg, + void *val, size_t val_count) +{ + struct rtl2830_dev *dev = i2c_get_clientdata(client); + int ret; + + i2c_lock_adapter(client->adapter); + ret = regmap_bulk_read(dev->regmap, reg, val, val_count); + i2c_unlock_adapter(client->adapter); + return ret; +} + +static int rtl2830_init(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; + int ret, i; + struct rtl2830_reg_val_mask tab[] = { + {0x00d, 0x01, 0x03}, + {0x00d, 0x10, 0x10}, + {0x104, 0x00, 0x1e}, + {0x105, 0x80, 0x80}, + {0x110, 0x02, 0x03}, + {0x110, 0x08, 0x0c}, + {0x17b, 0x00, 0x40}, + {0x17d, 0x05, 0x0f}, + {0x17d, 0x50, 0xf0}, + {0x18c, 0x08, 0x0f}, + {0x18d, 0x00, 0xc0}, + {0x188, 0x05, 0x0f}, + {0x189, 0x00, 0xfc}, + {0x2d5, 0x02, 0x02}, + {0x2f1, 0x02, 0x06}, + {0x2f1, 0x20, 0xf8}, + {0x16d, 0x00, 0x01}, + {0x1a6, 0x00, 0x80}, + {0x106, dev->pdata->vtop, 0x3f}, + {0x107, dev->pdata->krf, 0x3f}, + {0x112, 0x28, 0xff}, + {0x103, dev->pdata->agc_targ_val, 0xff}, + {0x00a, 0x02, 0x07}, + {0x140, 0x0c, 0x3c}, + {0x140, 0x40, 0xc0}, + {0x15b, 0x05, 0x07}, + {0x15b, 0x28, 0x38}, + {0x15c, 0x05, 0x07}, + {0x15c, 0x28, 0x38}, + {0x115, dev->pdata->spec_inv, 0x01}, + {0x16f, 0x01, 0x07}, + {0x170, 0x18, 0x38}, + {0x172, 0x0f, 0x0f}, + {0x173, 0x08, 0x38}, + {0x175, 0x01, 0x07}, + {0x176, 0x00, 0xc0}, + }; + + for (i = 0; i < ARRAY_SIZE(tab); i++) { + ret = rtl2830_update_bits(client, tab[i].reg, tab[i].mask, + tab[i].val); + if (ret) + goto err; + } + + ret = rtl2830_bulk_write(client, 0x18f, "\x28\x00", 2); + if (ret) + goto err; + + ret = rtl2830_bulk_write(client, 0x195, + "\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8); + if (ret) + goto err; + + /* TODO: spec init */ + + /* soft reset */ + ret = rtl2830_update_bits(client, 0x101, 0x04, 0x04); + if (ret) + goto err; + + ret = rtl2830_update_bits(client, 0x101, 0x04, 0x00); + if (ret) + goto err; + + /* init stats here in order signal app which stats are supported */ + c->strength.len = 1; + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->cnr.len = 1; + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_error.len = 1; + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_count.len = 1; + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + /* start statistics polling */ + schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); + + dev->sleeping = false; + + return ret; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2830_sleep(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + + dev->sleeping = true; + /* stop statistics polling */ + cancel_delayed_work_sync(&dev->stat_work); + dev->fe_status = 0; + + return 0; +} + +static int rtl2830_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *s) +{ + s->min_delay_ms = 500; + s->step_size = fe->ops.info.frequency_stepsize * 2; + s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; + + return 0; +} + +static int rtl2830_set_frontend(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, i; + u64 num; + u8 buf[3], u8tmp; + u32 if_ctl, if_frequency; + static const u8 bw_params1[3][34] = { + { + 0x1f, 0xf0, 0x1f, 0xf0, 0x1f, 0xfa, 0x00, 0x17, 0x00, 0x41, + 0x00, 0x64, 0x00, 0x67, 0x00, 0x38, 0x1f, 0xde, 0x1f, 0x7a, + 0x1f, 0x47, 0x1f, 0x7c, 0x00, 0x30, 0x01, 0x4b, 0x02, 0x82, + 0x03, 0x73, 0x03, 0xcf, /* 6 MHz */ + }, { + 0x1f, 0xfa, 0x1f, 0xda, 0x1f, 0xc1, 0x1f, 0xb3, 0x1f, 0xca, + 0x00, 0x07, 0x00, 0x4d, 0x00, 0x6d, 0x00, 0x40, 0x1f, 0xca, + 0x1f, 0x4d, 0x1f, 0x2a, 0x1f, 0xb2, 0x00, 0xec, 0x02, 0x7e, + 0x03, 0xd0, 0x04, 0x53, /* 7 MHz */ + }, { + 0x00, 0x10, 0x00, 0x0e, 0x1f, 0xf7, 0x1f, 0xc9, 0x1f, 0xa0, + 0x1f, 0xa6, 0x1f, 0xec, 0x00, 0x4e, 0x00, 0x7d, 0x00, 0x3a, + 0x1f, 0x98, 0x1f, 0x10, 0x1f, 0x40, 0x00, 0x75, 0x02, 0x5f, + 0x04, 0x24, 0x04, 0xdb, /* 8 MHz */ + }, + }; + static const u8 bw_params2[3][6] = { + {0xc3, 0x0c, 0x44, 0x33, 0x33, 0x30}, /* 6 MHz */ + {0xb8, 0xe3, 0x93, 0x99, 0x99, 0x98}, /* 7 MHz */ + {0xae, 0xba, 0xf3, 0x26, 0x66, 0x64}, /* 8 MHz */ + }; + + dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n", + c->frequency, c->bandwidth_hz, c->inversion); + + /* program tuner */ + if (fe->ops.tuner_ops.set_params) + fe->ops.tuner_ops.set_params(fe); + + switch (c->bandwidth_hz) { + case 6000000: + i = 0; + break; + case 7000000: + i = 1; + break; + case 8000000: + i = 2; + break; + default: + dev_err(&client->dev, "invalid bandwidth_hz %u\n", + c->bandwidth_hz); + return -EINVAL; + } + + ret = rtl2830_update_bits(client, 0x008, 0x06, i << 1); + if (ret) + goto err; + + /* program if frequency */ + if (fe->ops.tuner_ops.get_if_frequency) + ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); + else + ret = -EINVAL; + if (ret) + goto err; + + num = if_frequency % dev->pdata->clk; + num *= 0x400000; + num = div_u64(num, dev->pdata->clk); + num = -num; + if_ctl = num & 0x3fffff; + dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n", + if_frequency, if_ctl); + + buf[0] = (if_ctl >> 16) & 0x3f; + buf[1] = (if_ctl >> 8) & 0xff; + buf[2] = (if_ctl >> 0) & 0xff; + + ret = rtl2830_bulk_read(client, 0x119, &u8tmp, 1); + if (ret) + goto err; + + buf[0] |= u8tmp & 0xc0; /* [7:6] */ + + ret = rtl2830_bulk_write(client, 0x119, buf, 3); + if (ret) + goto err; + + /* 1/2 split I2C write */ + ret = rtl2830_bulk_write(client, 0x11c, &bw_params1[i][0], 17); + if (ret) + goto err; + + /* 2/2 split I2C write */ + ret = rtl2830_bulk_write(client, 0x12d, &bw_params1[i][17], 17); + if (ret) + goto err; + + ret = rtl2830_bulk_write(client, 0x19d, bw_params2[i], 6); + if (ret) + goto err; + + return ret; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2830_get_frontend(struct dvb_frontend *fe) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + u8 buf[3]; + + if (dev->sleeping) + return 0; + + ret = rtl2830_bulk_read(client, 0x33c, buf, 2); + if (ret) + goto err; + + ret = rtl2830_bulk_read(client, 0x351, &buf[2], 1); + if (ret) + goto err; + + dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf); + + switch ((buf[0] >> 2) & 3) { + case 0: + c->modulation = QPSK; + break; + case 1: + c->modulation = QAM_16; + break; + case 2: + c->modulation = QAM_64; + break; + } + + switch ((buf[2] >> 2) & 1) { + case 0: + c->transmission_mode = TRANSMISSION_MODE_2K; + break; + case 1: + c->transmission_mode = TRANSMISSION_MODE_8K; + } + + switch ((buf[2] >> 0) & 3) { + case 0: + c->guard_interval = GUARD_INTERVAL_1_32; + break; + case 1: + c->guard_interval = GUARD_INTERVAL_1_16; + break; + case 2: + c->guard_interval = GUARD_INTERVAL_1_8; + break; + case 3: + c->guard_interval = GUARD_INTERVAL_1_4; + break; + } + + switch ((buf[0] >> 4) & 7) { + case 0: + c->hierarchy = HIERARCHY_NONE; + break; + case 1: + c->hierarchy = HIERARCHY_1; + break; + case 2: + c->hierarchy = HIERARCHY_2; + break; + case 3: + c->hierarchy = HIERARCHY_4; + break; + } + + switch ((buf[1] >> 3) & 7) { + case 0: + c->code_rate_HP = FEC_1_2; + break; + case 1: + c->code_rate_HP = FEC_2_3; + break; + case 2: + c->code_rate_HP = FEC_3_4; + break; + case 3: + c->code_rate_HP = FEC_5_6; + break; + case 4: + c->code_rate_HP = FEC_7_8; + break; + } + + switch ((buf[1] >> 0) & 7) { + case 0: + c->code_rate_LP = FEC_1_2; + break; + case 1: + c->code_rate_LP = FEC_2_3; + break; + case 2: + c->code_rate_LP = FEC_3_4; + break; + case 3: + c->code_rate_LP = FEC_5_6; + break; + case 4: + c->code_rate_LP = FEC_7_8; + break; + } + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + int ret; + u8 u8tmp; + + *status = 0; + + if (dev->sleeping) + return 0; + + ret = rtl2830_bulk_read(client, 0x351, &u8tmp, 1); + if (ret) + goto err; + + u8tmp = (u8tmp >> 3) & 0x0f; /* [6:3] */ + if (u8tmp == 11) { + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; + } else if (u8tmp == 10) { + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI; + } + + dev->fe_status = *status; + + return ret; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) + *snr = div_s64(c->cnr.stat[0].svalue, 100); + else + *snr = 0; + + return 0; +} + +static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + + *ber = (dev->post_bit_error - dev->post_bit_error_prev); + dev->post_bit_error_prev = dev->post_bit_error; + + return 0; +} + +static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + *ucblocks = 0; + + return 0; +} + +static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + if (c->strength.stat[0].scale == FE_SCALE_RELATIVE) + *strength = c->strength.stat[0].uvalue; + else + *strength = 0; + + return 0; +} + +static struct dvb_frontend_ops rtl2830_ops = { + .delsys = {SYS_DVBT}, + .info = { + .name = "Realtek RTL2830 (DVB-T)", + .caps = FE_CAN_FEC_1_2 | + FE_CAN_FEC_2_3 | + FE_CAN_FEC_3_4 | + FE_CAN_FEC_5_6 | + FE_CAN_FEC_7_8 | + FE_CAN_FEC_AUTO | + FE_CAN_QPSK | + FE_CAN_QAM_16 | + FE_CAN_QAM_64 | + FE_CAN_QAM_AUTO | + FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | + FE_CAN_HIERARCHY_AUTO | + FE_CAN_RECOVER | + FE_CAN_MUTE_TS + }, + + .init = rtl2830_init, + .sleep = rtl2830_sleep, + + .get_tune_settings = rtl2830_get_tune_settings, + + .set_frontend = rtl2830_set_frontend, + .get_frontend = rtl2830_get_frontend, + + .read_status = rtl2830_read_status, + .read_snr = rtl2830_read_snr, + .read_ber = rtl2830_read_ber, + .read_ucblocks = rtl2830_read_ucblocks, + .read_signal_strength = rtl2830_read_signal_strength, +}; + +static void rtl2830_stat_work(struct work_struct *work) +{ + struct rtl2830_dev *dev = container_of(work, struct rtl2830_dev, stat_work.work); + struct i2c_client *client = dev->client; + struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; + int ret, tmp; + u8 u8tmp, buf[2]; + u16 u16tmp; + + dev_dbg(&client->dev, "\n"); + + /* signal strength */ + if (dev->fe_status & FE_HAS_SIGNAL) { + struct {signed int x:14; } s; + + /* read IF AGC */ + ret = rtl2830_bulk_read(client, 0x359, buf, 2); + if (ret) + goto err; + + u16tmp = buf[0] << 8 | buf[1] << 0; + u16tmp &= 0x3fff; /* [13:0] */ + tmp = s.x = u16tmp; /* 14-bit bin to 2 complement */ + u16tmp = clamp_val(-4 * tmp + 32767, 0x0000, 0xffff); + + dev_dbg(&client->dev, "IF AGC=%d\n", tmp); + + c->strength.stat[0].scale = FE_SCALE_RELATIVE; + c->strength.stat[0].uvalue = u16tmp; + } else { + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + + /* CNR */ + if (dev->fe_status & FE_HAS_VITERBI) { + unsigned hierarchy, constellation; + #define CONSTELLATION_NUM 3 + #define HIERARCHY_NUM 4 + static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { + {70705899, 70705899, 70705899, 70705899}, + {82433173, 82433173, 87483115, 94445660}, + {92888734, 92888734, 95487525, 99770748}, + }; + + ret = rtl2830_bulk_read(client, 0x33c, &u8tmp, 1); + if (ret) + goto err; + + constellation = (u8tmp >> 2) & 0x03; /* [3:2] */ + if (constellation > CONSTELLATION_NUM - 1) + goto err_schedule_delayed_work; + + hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */ + if (hierarchy > HIERARCHY_NUM - 1) + goto err_schedule_delayed_work; + + ret = rtl2830_bulk_read(client, 0x40c, buf, 2); + if (ret) + goto err; + + u16tmp = buf[0] << 8 | buf[1] << 0; + if (u16tmp) + tmp = (constant[constellation][hierarchy] - + intlog10(u16tmp)) / ((1 << 24) / 10000); + else + tmp = 0; + + dev_dbg(&client->dev, "CNR raw=%u\n", u16tmp); + + c->cnr.stat[0].scale = FE_SCALE_DECIBEL; + c->cnr.stat[0].svalue = tmp; + } else { + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + + /* BER */ + if (dev->fe_status & FE_HAS_LOCK) { + ret = rtl2830_bulk_read(client, 0x34e, buf, 2); + if (ret) + goto err; + + u16tmp = buf[0] << 8 | buf[1] << 0; + dev->post_bit_error += u16tmp; + dev->post_bit_count += 1000000; + + dev_dbg(&client->dev, "BER errors=%u total=1000000\n", u16tmp); + + c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_error.stat[0].uvalue = dev->post_bit_error; + c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_count.stat[0].uvalue = dev->post_bit_count; + } else { + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + +err_schedule_delayed_work: + schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); + return; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); +} + +static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff) +{ + struct i2c_client *client = fe->demodulator_priv; + int ret; + u8 u8tmp; + + dev_dbg(&client->dev, "onoff=%d\n", onoff); + + /* enable / disable PID filter */ + if (onoff) + u8tmp = 0x80; + else + u8tmp = 0x00; + + ret = rtl2830_update_bits(client, 0x061, 0x80, u8tmp); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int onoff) +{ + struct i2c_client *client = fe->demodulator_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + int ret; + u8 buf[4]; + + dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n", + index, pid, onoff); + + /* skip invalid PIDs (0x2000) */ + if (pid > 0x1fff || index > 32) + return 0; + + if (onoff) + set_bit(index, &dev->filters); + else + clear_bit(index, &dev->filters); + + /* enable / disable PIDs */ + buf[0] = (dev->filters >> 0) & 0xff; + buf[1] = (dev->filters >> 8) & 0xff; + buf[2] = (dev->filters >> 16) & 0xff; + buf[3] = (dev->filters >> 24) & 0xff; + ret = rtl2830_bulk_write(client, 0x062, buf, 4); + if (ret) + goto err; + + /* add PID */ + buf[0] = (pid >> 8) & 0xff; + buf[1] = (pid >> 0) & 0xff; + ret = rtl2830_bulk_write(client, 0x066 + 2 * index, buf, 2); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +/* + * I2C gate/mux/repeater logic + * We must use unlocked __i2c_transfer() here (through regmap) because of I2C + * adapter lock is already taken by tuner driver. + * Gate is closed automatically after single I2C transfer. + */ +static int rtl2830_select(struct i2c_adapter *adap, void *mux_priv, u32 chan_id) +{ + struct i2c_client *client = mux_priv; + struct rtl2830_dev *dev = i2c_get_clientdata(client); + int ret; + + dev_dbg(&client->dev, "\n"); + + /* open I2C repeater for 1 transfer, closes automatically */ + /* XXX: regmap_update_bits() does not lock I2C adapter */ + ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client) +{ + struct rtl2830_dev *dev = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + return &dev->fe; +} + +static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client) +{ + struct rtl2830_dev *dev = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + return dev->adapter; +} + +/* + * We implement own I2C access routines for regmap in order to get manual access + * to I2C adapter lock, which is needed for I2C mux adapter. + */ +static int rtl2830_regmap_read(void *context, const void *reg_buf, + size_t reg_size, void *val_buf, size_t val_size) +{ + struct i2c_client *client = context; + int ret; + struct i2c_msg msg[2] = { + { + .addr = client->addr, + .flags = 0, + .len = reg_size, + .buf = (u8 *)reg_buf, + }, { + .addr = client->addr, + .flags = I2C_M_RD, + .len = val_size, + .buf = val_buf, + } + }; + + ret = __i2c_transfer(client->adapter, msg, 2); + if (ret != 2) { + dev_warn(&client->dev, "i2c reg read failed %d\n", ret); + if (ret >= 0) + ret = -EREMOTEIO; + return ret; + } + return 0; +} + +static int rtl2830_regmap_write(void *context, const void *data, size_t count) +{ + struct i2c_client *client = context; + int ret; + struct i2c_msg msg[1] = { + { + .addr = client->addr, + .flags = 0, + .len = count, + .buf = (u8 *)data, + } + }; + + ret = __i2c_transfer(client->adapter, msg, 1); + if (ret != 1) { + dev_warn(&client->dev, "i2c reg write failed %d\n", ret); + if (ret >= 0) + ret = -EREMOTEIO; + return ret; + } + return 0; +} + +static int rtl2830_regmap_gather_write(void *context, const void *reg, + size_t reg_len, const void *val, + size_t val_len) +{ + struct i2c_client *client = context; + int ret; + u8 buf[256]; + struct i2c_msg msg[1] = { + { + .addr = client->addr, + .flags = 0, + .len = 1 + val_len, + .buf = buf, + } + }; + + buf[0] = *(u8 const *)reg; + memcpy(&buf[1], val, val_len); + + ret = __i2c_transfer(client->adapter, msg, 1); + if (ret != 1) { + dev_warn(&client->dev, "i2c reg write failed %d\n", ret); + if (ret >= 0) + ret = -EREMOTEIO; + return ret; + } + return 0; +} + +static int rtl2830_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct rtl2830_platform_data *pdata = client->dev.platform_data; + struct rtl2830_dev *dev; + int ret; + u8 u8tmp; + static const struct regmap_bus regmap_bus = { + .read = rtl2830_regmap_read, + .write = rtl2830_regmap_write, + .gather_write = rtl2830_regmap_gather_write, + .val_format_endian_default = REGMAP_ENDIAN_NATIVE, + }; + static const struct regmap_range_cfg regmap_range_cfg[] = { + { + .selector_reg = 0x00, + .selector_mask = 0xff, + .selector_shift = 0, + .window_start = 0, + .window_len = 0x100, + .range_min = 0 * 0x100, + .range_max = 5 * 0x100, + }, + }; + static const struct regmap_config regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 5 * 0x100, + .ranges = regmap_range_cfg, + .num_ranges = ARRAY_SIZE(regmap_range_cfg), + }; + + dev_dbg(&client->dev, "\n"); + + if (pdata == NULL) { + ret = -EINVAL; + goto err; + } + + /* allocate memory for the internal state */ + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) { + ret = -ENOMEM; + goto err; + } + + /* setup the state */ + i2c_set_clientdata(client, dev); + dev->client = client; + dev->pdata = client->dev.platform_data; + dev->sleeping = true; + INIT_DELAYED_WORK(&dev->stat_work, rtl2830_stat_work); + dev->regmap = regmap_init(&client->dev, ®map_bus, client, + ®map_config); + if (IS_ERR(dev->regmap)) { + ret = PTR_ERR(dev->regmap); + goto err_kfree; + } + + /* check if the demod is there */ + ret = rtl2830_bulk_read(client, 0x000, &u8tmp, 1); + if (ret) + goto err_regmap_exit; + + /* create muxed i2c adapter for tuner */ + dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev, + client, 0, 0, 0, rtl2830_select, NULL); + if (dev->adapter == NULL) { + ret = -ENODEV; + goto err_regmap_exit; + } + + /* create dvb frontend */ + memcpy(&dev->fe.ops, &rtl2830_ops, sizeof(dev->fe.ops)); + dev->fe.demodulator_priv = client; + + /* setup callbacks */ + pdata->get_dvb_frontend = rtl2830_get_dvb_frontend; + pdata->get_i2c_adapter = rtl2830_get_i2c_adapter; + pdata->pid_filter = rtl2830_pid_filter; + pdata->pid_filter_ctrl = rtl2830_pid_filter_ctrl; + + dev_info(&client->dev, "Realtek RTL2830 successfully attached\n"); + + return 0; +err_regmap_exit: + regmap_exit(dev->regmap); +err_kfree: + kfree(dev); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int rtl2830_remove(struct i2c_client *client) +{ + struct rtl2830_dev *dev = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + i2c_del_mux_adapter(dev->adapter); + regmap_exit(dev->regmap); + kfree(dev); + + return 0; +} + +static const struct i2c_device_id rtl2830_id_table[] = { + {"rtl2830", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, rtl2830_id_table); + +static struct i2c_driver rtl2830_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "rtl2830", + }, + .probe = rtl2830_probe, + .remove = rtl2830_remove, + .id_table = rtl2830_id_table, +}; + +module_i2c_driver(rtl2830_driver); + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver"); +MODULE_LICENSE("GPL"); |