diff options
Diffstat (limited to 'drivers/media/dvb/frontends/rtl2830.c')
| -rw-r--r-- | drivers/media/dvb/frontends/rtl2830.c | 757 |
1 files changed, 0 insertions, 757 deletions
diff --git a/drivers/media/dvb/frontends/rtl2830.c b/drivers/media/dvb/frontends/rtl2830.c deleted file mode 100644 index 93612eb..0000000 --- a/drivers/media/dvb/frontends/rtl2830.c +++ /dev/null @@ -1,757 +0,0 @@ -/* - * 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. - * - * 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., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - - -/* - * Driver implements own I2C-adapter for tuner I2C access. That's since chip - * have unusual I2C-gate control which closes gate automatically after each - * I2C transfer. Using own I2C adapter we can workaround that. - */ - -#include "rtl2830_priv.h" - -int rtl2830_debug; -module_param_named(debug, rtl2830_debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -/* write multiple hardware registers */ -static int rtl2830_wr(struct rtl2830_priv *priv, u8 reg, u8 *val, int len) -{ - int ret; - u8 buf[1+len]; - struct i2c_msg msg[1] = { - { - .addr = priv->cfg.i2c_addr, - .flags = 0, - .len = 1+len, - .buf = buf, - } - }; - - buf[0] = reg; - memcpy(&buf[1], val, len); - - ret = i2c_transfer(priv->i2c, msg, 1); - if (ret == 1) { - ret = 0; - } else { - warn("i2c wr failed=%d reg=%02x len=%d", ret, reg, len); - ret = -EREMOTEIO; - } - return ret; -} - -/* read multiple hardware registers */ -static int rtl2830_rd(struct rtl2830_priv *priv, u8 reg, u8 *val, int len) -{ - int ret; - struct i2c_msg msg[2] = { - { - .addr = priv->cfg.i2c_addr, - .flags = 0, - .len = 1, - .buf = ®, - }, { - .addr = priv->cfg.i2c_addr, - .flags = I2C_M_RD, - .len = len, - .buf = val, - } - }; - - ret = i2c_transfer(priv->i2c, msg, 2); - if (ret == 2) { - ret = 0; - } else { - warn("i2c rd failed=%d reg=%02x len=%d", ret, reg, len); - ret = -EREMOTEIO; - } - return ret; -} - -/* write multiple registers */ -static int rtl2830_wr_regs(struct rtl2830_priv *priv, u16 reg, u8 *val, int len) -{ - int ret; - u8 reg2 = (reg >> 0) & 0xff; - u8 page = (reg >> 8) & 0xff; - - /* switch bank if needed */ - if (page != priv->page) { - ret = rtl2830_wr(priv, 0x00, &page, 1); - if (ret) - return ret; - - priv->page = page; - } - - return rtl2830_wr(priv, reg2, val, len); -} - -/* read multiple registers */ -static int rtl2830_rd_regs(struct rtl2830_priv *priv, u16 reg, u8 *val, int len) -{ - int ret; - u8 reg2 = (reg >> 0) & 0xff; - u8 page = (reg >> 8) & 0xff; - - /* switch bank if needed */ - if (page != priv->page) { - ret = rtl2830_wr(priv, 0x00, &page, 1); - if (ret) - return ret; - - priv->page = page; - } - - return rtl2830_rd(priv, reg2, val, len); -} - -#if 0 /* currently not used */ -/* write single register */ -static int rtl2830_wr_reg(struct rtl2830_priv *priv, u16 reg, u8 val) -{ - return rtl2830_wr_regs(priv, reg, &val, 1); -} -#endif - -/* read single register */ -static int rtl2830_rd_reg(struct rtl2830_priv *priv, u16 reg, u8 *val) -{ - return rtl2830_rd_regs(priv, reg, val, 1); -} - -/* write single register with mask */ -int rtl2830_wr_reg_mask(struct rtl2830_priv *priv, u16 reg, u8 val, u8 mask) -{ - int ret; - u8 tmp; - - /* no need for read if whole reg is written */ - if (mask != 0xff) { - ret = rtl2830_rd_regs(priv, reg, &tmp, 1); - if (ret) - return ret; - - val &= mask; - tmp &= ~mask; - val |= tmp; - } - - return rtl2830_wr_regs(priv, reg, &val, 1); -} - -/* read single register with mask */ -int rtl2830_rd_reg_mask(struct rtl2830_priv *priv, u16 reg, u8 *val, u8 mask) -{ - int ret, i; - u8 tmp; - - ret = rtl2830_rd_regs(priv, reg, &tmp, 1); - if (ret) - return ret; - - tmp &= mask; - - /* find position of the first bit */ - for (i = 0; i < 8; i++) { - if ((mask >> i) & 0x01) - break; - } - *val = tmp >> i; - - return 0; -} - -static int rtl2830_init(struct dvb_frontend *fe) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - int ret, i; - u64 num; - u8 buf[3], tmp; - u32 if_ctl; - 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, priv->cfg.vtop, 0x3f }, - { 0x107, priv->cfg.krf, 0x3f }, - { 0x112, 0x28, 0xff }, - { 0x103, priv->cfg.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, priv->cfg.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_wr_reg_mask(priv, tab[i].reg, tab[i].val, - tab[i].mask); - if (ret) - goto err; - } - - ret = rtl2830_wr_regs(priv, 0x18f, "\x28\x00", 2); - if (ret) - goto err; - - ret = rtl2830_wr_regs(priv, 0x195, - "\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8); - if (ret) - goto err; - - num = priv->cfg.if_dvbt % priv->cfg.xtal; - num *= 0x400000; - num = div_u64(num, priv->cfg.xtal); - num = -num; - if_ctl = num & 0x3fffff; - dbg("%s: if_ctl=%08x", __func__, if_ctl); - - ret = rtl2830_rd_reg_mask(priv, 0x119, &tmp, 0xc0); /* b[7:6] */ - if (ret) - goto err; - - buf[0] = tmp << 6; - buf[0] = (if_ctl >> 16) & 0x3f; - buf[1] = (if_ctl >> 8) & 0xff; - buf[2] = (if_ctl >> 0) & 0xff; - - ret = rtl2830_wr_regs(priv, 0x119, buf, 3); - if (ret) - goto err; - - /* TODO: spec init */ - - /* soft reset */ - ret = rtl2830_wr_reg_mask(priv, 0x101, 0x04, 0x04); - if (ret) - goto err; - - ret = rtl2830_wr_reg_mask(priv, 0x101, 0x00, 0x04); - if (ret) - goto err; - - priv->sleeping = false; - - return ret; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static int rtl2830_sleep(struct dvb_frontend *fe) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - priv->sleeping = true; - return 0; -} - -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 rtl2830_priv *priv = fe->demodulator_priv; - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret, i; - static 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 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 */ - }; - - - dbg("%s: frequency=%d bandwidth_hz=%d inversion=%d", __func__, - 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: - dbg("invalid bandwidth"); - return -EINVAL; - } - - ret = rtl2830_wr_reg_mask(priv, 0x008, i << 1, 0x06); - if (ret) - goto err; - - /* 1/2 split I2C write */ - ret = rtl2830_wr_regs(priv, 0x11c, &bw_params1[i][0], 17); - if (ret) - goto err; - - /* 2/2 split I2C write */ - ret = rtl2830_wr_regs(priv, 0x12d, &bw_params1[i][17], 17); - if (ret) - goto err; - - ret = rtl2830_wr_regs(priv, 0x19d, bw_params2[i], 6); - if (ret) - goto err; - - return ret; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static int rtl2830_get_frontend(struct dvb_frontend *fe) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - u8 buf[3]; - - if (priv->sleeping) - return 0; - - ret = rtl2830_rd_regs(priv, 0x33c, buf, 2); - if (ret) - goto err; - - ret = rtl2830_rd_reg(priv, 0x351, &buf[2]); - if (ret) - goto err; - - dbg("%s: TPS=%02x %02x %02x", __func__, buf[0], buf[1], buf[2]); - - 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: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - int ret; - u8 tmp; - *status = 0; - - if (priv->sleeping) - return 0; - - ret = rtl2830_rd_reg_mask(priv, 0x351, &tmp, 0x78); /* [6:3] */ - if (ret) - goto err; - - if (tmp == 11) { - *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; - } else if (tmp == 10) { - *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI; - } - - return ret; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - int ret, hierarchy, constellation; - u8 buf[2], tmp; - u16 tmp16; -#define CONSTELLATION_NUM 3 -#define HIERARCHY_NUM 4 - static const u32 snr_constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { - { 70705899, 70705899, 70705899, 70705899 }, - { 82433173, 82433173, 87483115, 94445660 }, - { 92888734, 92888734, 95487525, 99770748 }, - }; - - if (priv->sleeping) - return 0; - - /* reports SNR in resolution of 0.1 dB */ - - ret = rtl2830_rd_reg(priv, 0x33c, &tmp); - if (ret) - goto err; - - constellation = (tmp >> 2) & 0x03; /* [3:2] */ - if (constellation > CONSTELLATION_NUM - 1) - goto err; - - hierarchy = (tmp >> 4) & 0x07; /* [6:4] */ - if (hierarchy > HIERARCHY_NUM - 1) - goto err; - - ret = rtl2830_rd_regs(priv, 0x40c, buf, 2); - if (ret) - goto err; - - tmp16 = buf[0] << 8 | buf[1]; - - if (tmp16) - *snr = (snr_constant[constellation][hierarchy] - - intlog10(tmp16)) / ((1 << 24) / 100); - else - *snr = 0; - - return 0; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - int ret; - u8 buf[2]; - - if (priv->sleeping) - return 0; - - ret = rtl2830_rd_regs(priv, 0x34e, buf, 2); - if (ret) - goto err; - - *ber = buf[0] << 8 | buf[1]; - - return 0; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -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 rtl2830_priv *priv = fe->demodulator_priv; - int ret; - u8 buf[2]; - u16 if_agc_raw, if_agc; - - if (priv->sleeping) - return 0; - - ret = rtl2830_rd_regs(priv, 0x359, buf, 2); - if (ret) - goto err; - - if_agc_raw = (buf[0] << 8 | buf[1]) & 0x3fff; - - if (if_agc_raw & (1 << 9)) - if_agc = -(~(if_agc_raw - 1) & 0x1ff); - else - if_agc = if_agc_raw; - - *strength = (u8) (55 - if_agc / 182); - *strength |= *strength << 8; - - return 0; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static struct dvb_frontend_ops rtl2830_ops; - -static u32 rtl2830_tuner_i2c_func(struct i2c_adapter *adapter) -{ - return I2C_FUNC_I2C; -} - -static int rtl2830_tuner_i2c_xfer(struct i2c_adapter *i2c_adap, - struct i2c_msg msg[], int num) -{ - struct rtl2830_priv *priv = i2c_get_adapdata(i2c_adap); - int ret; - - /* open i2c-gate */ - ret = rtl2830_wr_reg_mask(priv, 0x101, 0x08, 0x08); - if (ret) - goto err; - - ret = i2c_transfer(priv->i2c, msg, num); - if (ret < 0) - warn("tuner i2c failed=%d", ret); - - return ret; -err: - dbg("%s: failed=%d", __func__, ret); - return ret; -} - -static struct i2c_algorithm rtl2830_tuner_i2c_algo = { - .master_xfer = rtl2830_tuner_i2c_xfer, - .functionality = rtl2830_tuner_i2c_func, -}; - -struct i2c_adapter *rtl2830_get_tuner_i2c_adapter(struct dvb_frontend *fe) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - return &priv->tuner_i2c_adapter; -} -EXPORT_SYMBOL(rtl2830_get_tuner_i2c_adapter); - -static void rtl2830_release(struct dvb_frontend *fe) -{ - struct rtl2830_priv *priv = fe->demodulator_priv; - - i2c_del_adapter(&priv->tuner_i2c_adapter); - kfree(priv); -} - -struct dvb_frontend *rtl2830_attach(const struct rtl2830_config *cfg, - struct i2c_adapter *i2c) -{ - struct rtl2830_priv *priv = NULL; - int ret = 0; - u8 tmp; - - /* allocate memory for the internal state */ - priv = kzalloc(sizeof(struct rtl2830_priv), GFP_KERNEL); - if (priv == NULL) - goto err; - - /* setup the priv */ - priv->i2c = i2c; - memcpy(&priv->cfg, cfg, sizeof(struct rtl2830_config)); - - /* check if the demod is there */ - ret = rtl2830_rd_reg(priv, 0x000, &tmp); - if (ret) - goto err; - - /* create dvb_frontend */ - memcpy(&priv->fe.ops, &rtl2830_ops, sizeof(struct dvb_frontend_ops)); - priv->fe.demodulator_priv = priv; - - /* create tuner i2c adapter */ - strlcpy(priv->tuner_i2c_adapter.name, "RTL2830 tuner I2C adapter", - sizeof(priv->tuner_i2c_adapter.name)); - priv->tuner_i2c_adapter.algo = &rtl2830_tuner_i2c_algo; - priv->tuner_i2c_adapter.algo_data = NULL; - i2c_set_adapdata(&priv->tuner_i2c_adapter, priv); - if (i2c_add_adapter(&priv->tuner_i2c_adapter) < 0) { - err("tuner I2C bus could not be initialized"); - goto err; - } - - priv->sleeping = true; - - return &priv->fe; -err: - dbg("%s: failed=%d", __func__, ret); - kfree(priv); - return NULL; -} -EXPORT_SYMBOL(rtl2830_attach); - -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 - }, - - .release = rtl2830_release, - - .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, -}; - -MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); -MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver"); -MODULE_LICENSE("GPL"); |
