diff options
Diffstat (limited to 'drivers/media/dvb/frontends/lgdt3305.c')
| -rw-r--r-- | drivers/media/dvb/frontends/lgdt3305.c | 1087 |
1 files changed, 1087 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/lgdt3305.c b/drivers/media/dvb/frontends/lgdt3305.c new file mode 100644 index 000000000000..d92d0557a80b --- /dev/null +++ b/drivers/media/dvb/frontends/lgdt3305.c @@ -0,0 +1,1087 @@ +/* + * Support for LGDT3305 - VSB/QAM + * + * Copyright (C) 2008, 2009 Michael Krufky <mkrufky@linuxtv.org> + * + * 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/dvb/frontend.h> +#include "dvb_math.h" +#include "lgdt3305.h" + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))"); + +#define DBG_INFO 1 +#define DBG_REG 2 + +#define lg_printk(kern, fmt, arg...) \ + printk(kern "%s: " fmt, __func__, ##arg) + +#define lg_info(fmt, arg...) printk(KERN_INFO "lgdt3305: " fmt, ##arg) +#define lg_warn(fmt, arg...) lg_printk(KERN_WARNING, fmt, ##arg) +#define lg_err(fmt, arg...) lg_printk(KERN_ERR, fmt, ##arg) +#define lg_dbg(fmt, arg...) if (debug & DBG_INFO) \ + lg_printk(KERN_DEBUG, fmt, ##arg) +#define lg_reg(fmt, arg...) if (debug & DBG_REG) \ + lg_printk(KERN_DEBUG, fmt, ##arg) + +#define lg_fail(ret) \ +({ \ + int __ret; \ + __ret = (ret < 0); \ + if (__ret) \ + lg_err("error %d on line %d\n", ret, __LINE__); \ + __ret; \ +}) + +struct lgdt3305_state { + struct i2c_adapter *i2c_adap; + const struct lgdt3305_config *cfg; + + struct dvb_frontend frontend; + + fe_modulation_t current_modulation; + u32 current_frequency; + u32 snr; +}; + +/* ------------------------------------------------------------------------ */ + +#define LGDT3305_GEN_CTRL_1 0x0000 +#define LGDT3305_GEN_CTRL_2 0x0001 +#define LGDT3305_GEN_CTRL_3 0x0002 +#define LGDT3305_GEN_STATUS 0x0003 +#define LGDT3305_GEN_CONTROL 0x0007 +#define LGDT3305_GEN_CTRL_4 0x000a +#define LGDT3305_DGTL_AGC_REF_1 0x0012 +#define LGDT3305_DGTL_AGC_REF_2 0x0013 +#define LGDT3305_CR_CTR_FREQ_1 0x0106 +#define LGDT3305_CR_CTR_FREQ_2 0x0107 +#define LGDT3305_CR_CTR_FREQ_3 0x0108 +#define LGDT3305_CR_CTR_FREQ_4 0x0109 +#define LGDT3305_CR_MSE_1 0x011b +#define LGDT3305_CR_MSE_2 0x011c +#define LGDT3305_CR_LOCK_STATUS 0x011d +#define LGDT3305_CR_CTRL_7 0x0126 +#define LGDT3305_AGC_POWER_REF_1 0x0300 +#define LGDT3305_AGC_POWER_REF_2 0x0301 +#define LGDT3305_AGC_DELAY_PT_1 0x0302 +#define LGDT3305_AGC_DELAY_PT_2 0x0303 +#define LGDT3305_RFAGC_LOOP_FLTR_BW_1 0x0306 +#define LGDT3305_RFAGC_LOOP_FLTR_BW_2 0x0307 +#define LGDT3305_IFBW_1 0x0308 +#define LGDT3305_IFBW_2 0x0309 +#define LGDT3305_AGC_CTRL_1 0x030c +#define LGDT3305_AGC_CTRL_4 0x0314 +#define LGDT3305_EQ_MSE_1 0x0413 +#define LGDT3305_EQ_MSE_2 0x0414 +#define LGDT3305_EQ_MSE_3 0x0415 +#define LGDT3305_PT_MSE_1 0x0417 +#define LGDT3305_PT_MSE_2 0x0418 +#define LGDT3305_PT_MSE_3 0x0419 +#define LGDT3305_FEC_BLOCK_CTRL 0x0504 +#define LGDT3305_FEC_LOCK_STATUS 0x050a +#define LGDT3305_FEC_PKT_ERR_1 0x050c +#define LGDT3305_FEC_PKT_ERR_2 0x050d +#define LGDT3305_TP_CTRL_1 0x050e +#define LGDT3305_BERT_PERIOD 0x0801 +#define LGDT3305_BERT_ERROR_COUNT_1 0x080a +#define LGDT3305_BERT_ERROR_COUNT_2 0x080b +#define LGDT3305_BERT_ERROR_COUNT_3 0x080c +#define LGDT3305_BERT_ERROR_COUNT_4 0x080d + +static int lgdt3305_write_reg(struct lgdt3305_state *state, u16 reg, u8 val) +{ + int ret; + u8 buf[] = { reg >> 8, reg & 0xff, val }; + struct i2c_msg msg = { + .addr = state->cfg->i2c_addr, .flags = 0, + .buf = buf, .len = 3, + }; + + lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val); + + ret = i2c_transfer(state->i2c_adap, &msg, 1); + + if (ret != 1) { + lg_err("error (addr %02x %02x <- %02x, err = %i)\n", + msg.buf[0], msg.buf[1], msg.buf[2], ret); + if (ret < 0) + return ret; + else + return -EREMOTEIO; + } + return 0; +} + +static int lgdt3305_read_reg(struct lgdt3305_state *state, u16 reg, u8 *val) +{ + int ret; + u8 reg_buf[] = { reg >> 8, reg & 0xff }; + struct i2c_msg msg[] = { + { .addr = state->cfg->i2c_addr, + .flags = 0, .buf = reg_buf, .len = 2 }, + { .addr = state->cfg->i2c_addr, + .flags = I2C_M_RD, .buf = val, .len = 1 }, + }; + + lg_reg("reg: 0x%04x\n", reg); + + ret = i2c_transfer(state->i2c_adap, msg, 2); + + if (ret != 2) { + lg_err("error (addr %02x reg %04x error (ret == %i)\n", + state->cfg->i2c_addr, reg, ret); + if (ret < 0) + return ret; + else + return -EREMOTEIO; + } + return 0; +} + +#define read_reg(state, reg) \ +({ \ + u8 __val; \ + int ret = lgdt3305_read_reg(state, reg, &__val); \ + if (lg_fail(ret)) \ + __val = 0; \ + __val; \ +}) + +static int lgdt3305_set_reg_bit(struct lgdt3305_state *state, + u16 reg, int bit, int onoff) +{ + u8 val; + int ret; + + lg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff); + + ret = lgdt3305_read_reg(state, reg, &val); + if (lg_fail(ret)) + goto fail; + + val &= ~(1 << bit); + val |= (onoff & 1) << bit; + + ret = lgdt3305_write_reg(state, reg, val); +fail: + return ret; +} + +struct lgdt3305_reg { + u16 reg; + u8 val; +}; + +static int lgdt3305_write_regs(struct lgdt3305_state *state, + struct lgdt3305_reg *regs, int len) +{ + int i, ret; + + lg_reg("writing %d registers...\n", len); + + for (i = 0; i < len - 1; i++) { + ret = lgdt3305_write_reg(state, regs[i].reg, regs[i].val); + if (lg_fail(ret)) + return ret; + } + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static int lgdt3305_soft_reset(struct lgdt3305_state *state) +{ + int ret; + + lg_dbg("\n"); + + ret = lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_3, 0, 0); + if (lg_fail(ret)) + goto fail; + + msleep(20); + ret = lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_3, 0, 1); +fail: + return ret; +} + +static inline int lgdt3305_mpeg_mode(struct lgdt3305_state *state, + enum lgdt3305_mpeg_mode mode) +{ + lg_dbg("(%d)\n", mode); + return lgdt3305_set_reg_bit(state, LGDT3305_TP_CTRL_1, 5, mode); +} + +static int lgdt3305_mpeg_mode_polarity(struct lgdt3305_state *state, + enum lgdt3305_tp_clock_edge edge, + enum lgdt3305_tp_valid_polarity valid) +{ + u8 val; + int ret; + + lg_dbg("edge = %d, valid = %d\n", edge, valid); + + ret = lgdt3305_read_reg(state, LGDT3305_TP_CTRL_1, &val); + if (lg_fail(ret)) + goto fail; + + val &= ~0x09; + + if (edge) + val |= 0x08; + if (valid) + val |= 0x01; + + ret = lgdt3305_write_reg(state, LGDT3305_TP_CTRL_1, val); + if (lg_fail(ret)) + goto fail; + + ret = lgdt3305_soft_reset(state); +fail: + return ret; +} + +static int lgdt3305_set_modulation(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + u8 opermode; + int ret; + + lg_dbg("\n"); + + ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_1, &opermode); + if (lg_fail(ret)) + goto fail; + + opermode &= ~0x03; + + switch (param->u.vsb.modulation) { + case VSB_8: + opermode |= 0x03; + break; + case QAM_64: + opermode |= 0x00; + break; + case QAM_256: + opermode |= 0x01; + break; + default: + return -EINVAL; + } + ret = lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_1, opermode); +fail: + return ret; +} + +static int lgdt3305_set_filter_extension(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + int val; + + switch (param->u.vsb.modulation) { + case VSB_8: + val = 0; + break; + case QAM_64: + case QAM_256: + val = 1; + break; + default: + return -EINVAL; + } + lg_dbg("val = %d\n", val); + + return lgdt3305_set_reg_bit(state, 0x043f, 2, val); +} + +/* ------------------------------------------------------------------------ */ + +static int lgdt3305_passband_digital_agc(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + u16 agc_ref; + + switch (param->u.vsb.modulation) { + case VSB_8: + agc_ref = 0x32c4; + break; + case QAM_64: + agc_ref = 0x2a00; + break; + case QAM_256: + agc_ref = 0x2a80; + break; + default: + return -EINVAL; + } + + lg_dbg("agc ref: 0x%04x\n", agc_ref); + + lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_1, agc_ref >> 8); + lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_2, agc_ref & 0xff); + + return 0; +} + +static int lgdt3305_rfagc_loop(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + u16 ifbw, rfbw, agcdelay; + + switch (param->u.vsb.modulation) { + case VSB_8: + agcdelay = 0x04c0; + rfbw = 0x8000; + ifbw = 0x8000; + break; + case QAM_64: + case QAM_256: + agcdelay = 0x046b; + rfbw = 0x8889; + ifbw = 0x8888; + break; + default: + return -EINVAL; + } + + if (state->cfg->rf_agc_loop) { + lg_dbg("agcdelay: 0x%04x, rfbw: 0x%04x\n", agcdelay, rfbw); + + /* rf agc loop filter bandwidth */ + lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_1, + agcdelay >> 8); + lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_2, + agcdelay & 0xff); + + lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_1, + rfbw >> 8); + lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_2, + rfbw & 0xff); + } else { + lg_dbg("ifbw: 0x%04x\n", ifbw); + + /* if agc loop filter bandwidth */ + lgdt3305_write_reg(state, LGDT3305_IFBW_1, ifbw >> 8); + lgdt3305_write_reg(state, LGDT3305_IFBW_2, ifbw & 0xff); + } + + return 0; +} + +static int lgdt3305_agc_setup(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + int lockdten, acqen; + + switch (param->u.vsb.modulation) { + case VSB_8: + lockdten = 0; + acqen = 0; + break; + case QAM_64: + case QAM_256: + lockdten = 1; + acqen = 1; + break; + default: + return -EINVAL; + } + + lg_dbg("lockdten = %d, acqen = %d\n", lockdten, acqen); + + /* control agc function */ + lgdt3305_write_reg(state, LGDT3305_AGC_CTRL_4, 0xe1 | lockdten << 1); + lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 2, acqen); + + return lgdt3305_rfagc_loop(state, param); +} + +static int lgdt3305_set_agc_power_ref(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + u16 usref = 0; + + switch (param->u.vsb.modulation) { + case VSB_8: + if (state->cfg->usref_8vsb) + usref = state->cfg->usref_8vsb; + break; + case QAM_64: + if (state->cfg->usref_qam64) + usref = state->cfg->usref_qam64; + break; + case QAM_256: + if (state->cfg->usref_qam256) + usref = state->cfg->usref_qam256; + break; + default: + return -EINVAL; + } + + if (usref) { + lg_dbg("set manual mode: 0x%04x\n", usref); + + lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 3, 1); + + lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_1, + 0xff & (usref >> 8)); + lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_2, + 0xff & (usref >> 0)); + } + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static int lgdt3305_spectral_inversion(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param, + int inversion) +{ + int ret; + + lg_dbg("(%d)\n", inversion); + + switch (param->u.vsb.modulation) { + case VSB_8: + ret = lgdt3305_write_reg(state, LGDT3305_CR_CTRL_7, + inversion ? 0xf9 : 0x79); + break; + case QAM_64: + case QAM_256: + ret = lgdt3305_write_reg(state, LGDT3305_FEC_BLOCK_CTRL, + inversion ? 0xfd : 0xff); + break; + default: + ret = -EINVAL; + } + return ret; +} + +static int lgdt3305_set_if(struct lgdt3305_state *state, + struct dvb_frontend_parameters *param) +{ + u16 if_freq_khz; + u8 nco1, nco2, nco3, nco4; + u64 nco; + + switch (param->u.vsb.modulation) { + case VSB_8: + if_freq_khz = state->cfg->vsb_if_khz; + break; + case QAM_64: + case QAM_256: + if_freq_khz = state->cfg->qam_if_khz; + break; + default: + return -EINVAL; + } + + nco = if_freq_khz / 10; + +#define LGDT3305_64BIT_DIVISION_ENABLED 0 + /* FIXME: 64bit division disabled to avoid linking error: + * WARNING: "__udivdi3" [lgdt3305.ko] undefined! + */ + switch (param->u.vsb.modulation) { + case VSB_8: +#if LGDT3305_64BIT_DIVISION_ENABLED + nco <<= 24; + nco /= 625; +#else + nco *= ((1 << 24) / 625); +#endif + break; + case QAM_64: + case QAM_256: +#if LGDT3305_64BIT_DIVISION_ENABLED + nco <<= 28; + nco /= 625; +#else + nco *= ((1 << 28) / 625); +#endif + break; + default: + return -EINVAL; + } + + nco1 = (nco >> 24) & 0x3f; + nco1 |= 0x40; + nco2 = (nco >> 16) & 0xff; + nco3 = (nco >> 8) & 0xff; + nco4 = nco & 0xff; + + lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_1, nco1); + lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_2, nco2); + lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_3, nco3); + lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_4, nco4); + + lg_dbg("%d KHz -> [%02x%02x%02x%02x]\n", + if_freq_khz, nco1, nco2, nco3, nco4); + + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static int lgdt3305_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + + if (state->cfg->deny_i2c_rptr) + return 0; + + lg_dbg("(%d)\n", enable); + + return lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_2, 5, + enable ? 0 : 1); +} + +static int lgdt3305_sleep(struct dvb_frontend *fe) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + u8 gen_ctrl_3, gen_ctrl_4; + + lg_dbg("\n"); + + gen_ctrl_3 = read_reg(state, LGDT3305_GEN_CTRL_3); + gen_ctrl_4 = read_reg(state, LGDT3305_GEN_CTRL_4); + + /* hold in software reset while sleeping */ + gen_ctrl_3 &= ~0x01; + /* tristate the IF-AGC pin */ + gen_ctrl_3 |= 0x02; + /* tristate the RF-AGC pin */ + gen_ctrl_3 |= 0x04; + + /* disable vsb/qam module */ + gen_ctrl_4 &= ~0x01; + /* disable adc module */ + gen_ctrl_4 &= ~0x02; + + lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_3, gen_ctrl_3); + lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_4, gen_ctrl_4); + + return 0; +} + +static int lgdt3305_init(struct dvb_frontend *fe) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + int ret; + + static struct lgdt3305_reg lgdt3305_init_data[] = { + { .reg = LGDT3305_GEN_CTRL_1, + .val = 0x03, }, + { .reg = LGDT3305_GEN_CTRL_2, + .val = 0xb0, }, + { .reg = LGDT3305_GEN_CTRL_3, + .val = 0x01, }, + { .reg = LGDT3305_GEN_CONTROL, + .val = 0x6f, }, + { .reg = LGDT3305_GEN_CTRL_4, + .val = 0x03, }, + { .reg = LGDT3305_DGTL_AGC_REF_1, + .val = 0x32, }, + { .reg = LGDT3305_DGTL_AGC_REF_2, + .val = 0xc4, }, + { .reg = LGDT3305_CR_CTR_FREQ_1, + .val = 0x00, }, + { .reg = LGDT3305_CR_CTR_FREQ_2, + .val = 0x00, }, + { .reg = LGDT3305_CR_CTR_FREQ_3, + .val = 0x00, }, + { .reg = LGDT3305_CR_CTR_FREQ_4, + .val = 0x00, }, + { .reg = LGDT3305_CR_CTRL_7, + .val = 0x79, }, + { .reg = LGDT3305_AGC_POWER_REF_1, + .val = 0x32, }, + { .reg = LGDT3305_AGC_POWER_REF_2, + .val = 0xc4, }, + { .reg = LGDT3305_AGC_DELAY_PT_1, + .val = 0x0d, }, + { .reg = LGDT3305_AGC_DELAY_PT_2, + .val = 0x30, }, + { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_1, + .val = 0x80, }, + { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_2, + .val = 0x00, }, + { .reg = LGDT3305_IFBW_1, + .val = 0x80, }, + { .reg = LGDT3305_IFBW_2, + .val = 0x00, }, + { .reg = LGDT3305_AGC_CTRL_1, + .val = 0x30, }, + { .reg = LGDT3305_AGC_CTRL_4, + .val = 0x61, }, + { .reg = LGDT3305_FEC_BLOCK_CTRL, + .val = 0xff, }, + { .reg = LGDT3305_TP_CTRL_1, + .val = 0x1b, }, + }; + + lg_dbg("\n"); + + ret = lgdt3305_write_regs(state, lgdt3305_init_data, + ARRAY_SIZE(lgdt3305_init_data)); + if (lg_fail(ret)) + goto fail; + + ret = lgdt3305_soft_reset(state); +fail: + return ret; +} + +static int lgdt3305_set_parameters(struct dvb_frontend *fe, + struct dvb_frontend_parameters *param) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + int ret; + + lg_dbg("(%d, %d)\n", param->frequency, param->u.vsb.modulation); + + if (fe->ops.tuner_ops.set_params) { + ret = fe->ops.tuner_ops.set_params(fe, param); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + if (lg_fail(ret)) + goto fail; + state->current_frequency = param->frequency; + } + + ret = lgdt3305_set_modulation(state, param); + if (lg_fail(ret)) + goto fail; + + ret = lgdt3305_passband_digital_agc(state, param); + if (lg_fail(ret)) + goto fail; + ret = lgdt3305_set_agc_power_ref(state, param); + if (lg_fail(ret)) + goto fail; + ret = lgdt3305_agc_setup(state, param); + if (lg_fail(ret)) + goto fail; + + /* low if */ + ret = lgdt3305_write_reg(state, LGDT3305_GEN_CONTROL, 0x2f); + if (lg_fail(ret)) + goto fail; + ret = lgdt3305_set_reg_bit(state, LGDT3305_CR_CTR_FREQ_1, 6, 1); + if (lg_fail(ret)) + goto fail; + + ret = lgdt3305_set_if(state, param); + if (lg_fail(ret)) + goto fail; + ret = lgdt3305_spectral_inversion(state, param, + state->cfg->spectral_inversion + ? 1 : 0); + if (lg_fail(ret)) + goto fail; + + ret = lgdt3305_set_filter_extension(state, param); + if (lg_fail(ret)) + goto fail; + + state->current_modulation = param->u.vsb.modulation; + + ret = lgdt3305_mpeg_mode(state, state->cfg->mpeg_mode); + if (lg_fail(ret)) + goto fail; + + /* lgdt3305_mpeg_mode_polarity calls lgdt3305_soft_reset */ + ret = lgdt3305_mpeg_mode_polarity(state, + state->cfg->tpclk_edge, + state->cfg->tpvalid_polarity); +fail: + return ret; +} + +static int lgdt3305_get_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *param) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + + lg_dbg("\n"); + + param->u.vsb.modulation = state->current_modulation; + param->frequency = state->current_frequency; + return 0; +} + +/* ------------------------------------------------------------------------ */ + +static int lgdt3305_read_cr_lock_status(struct lgdt3305_state *state, + int *locked) +{ + u8 val; + int ret; + char *cr_lock_state = ""; + + *locked = 0; + + ret = lgdt3305_read_reg(state, LGDT3305_CR_LOCK_STATUS, &val); + if (lg_fail(ret)) + goto fail; + + switch (state->current_modulation) { + case QAM_256: + case QAM_64: + if (val & (1 << 1)) + *locked = 1; + + switch (val & 0x07) { + case 0: + cr_lock_state = "QAM UNLOCK"; + break; + case 4: + cr_lock_state = "QAM 1stLock"; + break; + case 6: + cr_lock_state = "QAM 2ndLock"; + break; + case 7: + cr_lock_state = "QAM FinalLock"; + break; + default: + cr_lock_state = "CLOCKQAM-INVALID!"; + break; + } + break; + case VSB_8: + if (val & (1 << 7)) { + *locked = 1; + cr_lock_state = "CLOCKVSB"; + } + break; + default: + ret = -EINVAL; + } + lg_dbg("(%d) %s\n", *locked, cr_lock_state); +fail: + return ret; +} + +static int lgdt3305_read_fec_lock_status(struct lgdt3305_state *state, + int *locked) +{ + u8 val; + int ret, mpeg_lock, fec_lock, viterbi_lock; + + *locked = 0; + + switch (state->current_modulation) { + case QAM_256: + case QAM_64: + ret = lgdt3305_read_reg(state, + LGDT3305_FEC_LOCK_STATUS, &val); + if (lg_fail(ret)) + goto fail; + + mpeg_lock = (val & (1 << 0)) ? 1 : 0; + fec_lock = (val & (1 << 2)) ? 1 : 0; + viterbi_lock = (val & (1 << 3)) ? 1 : 0; + + *locked = mpeg_lock && fec_lock && viterbi_lock; + + lg_dbg("(%d) %s%s%s\n", *locked, + mpeg_lock ? "mpeg lock " : "", + fec_lock ? "fec lock " : "", + viterbi_lock ? "viterbi lock" : ""); + break; + case VSB_8: + default: + ret = -EINVAL; + } +fail: + return ret; +} + +static int lgdt3305_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + u8 val; + int ret, signal, inlock, nofecerr, snrgood, + cr_lock, fec_lock, sync_lock; + + *status = 0; + + ret = lgdt3305_read_reg(state, LGDT3305_GEN_STATUS, &val); + if (lg_fail(ret)) + goto fail; + + signal = (val & (1 << 4)) ? 1 : 0; + inlock = (val & (1 << 3)) ? 0 : 1; + sync_lock = (val & (1 << 2)) ? 1 : 0; + nofecerr = (val & (1 << 1)) ? 1 : 0; + snrgood = (val & (1 << 0)) ? 1 : 0; + + lg_dbg("%s%s%s%s%s\n", + signal ? "SIGNALEXIST " : "", + inlock ? "INLOCK " : "", + sync_lock ? "SYNCLOCK " : "", + nofecerr ? "NOFECERR " : "", + snrgood ? "SNRGOOD " : ""); + + ret = lgdt3305_read_cr_lock_status(state, &cr_lock); + if (lg_fail(ret)) + goto fail; + + if (signal) + *status |= FE_HAS_SIGNAL; + if (cr_lock) + *status |= FE_HAS_CARRIER; + if (nofecerr) + *status |= FE_HAS_VITERBI; + if (sync_lock) + *status |= FE_HAS_SYNC; + + switch (state->current_modulation) { + case QAM_256: + case QAM_64: + ret = lgdt3305_read_fec_lock_status(state, &fec_lock); + if (lg_fail(ret)) + goto fail; + + if (fec_lock) + *status |= FE_HAS_LOCK; + break; + case VSB_8: + if (inlock) + *status |= FE_HAS_LOCK; + break; + default: + ret = -EINVAL; + } +fail: + return ret; +} + +/* ------------------------------------------------------------------------ */ + +/* borrowed from lgdt330x.c */ +static u32 calculate_snr(u32 mse, u32 c) +{ + if (mse == 0) /* no signal */ + return 0; + + mse = intlog10(mse); + if (mse > c) { + /* Negative SNR, which is possible, but realisticly the + demod will lose lock before the signal gets this bad. The + API only allows for unsigned values, so just return 0 */ + return 0; + } + return 10*(c - mse); +} + +static int lgdt3305_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + u32 noise; /* noise value */ + u32 c; /* per-modulation SNR calculation constant */ + + switch (state->current_modulation) { + case VSB_8: +#ifdef USE_PTMSE + /* Use Phase Tracker Mean-Square Error Register */ + /* SNR for ranges from -13.11 to +44.08 */ + noise = ((read_reg(state, LGDT3305_PT_MSE_1) & 0x07) << 16) | + (read_reg(state, LGDT3305_PT_MSE_2) << 8) | + (read_reg(state, LGDT3305_PT_MSE_3) & 0xff); + c = 73957994; /* log10(25*32^2)*2^24 */ +#else + /* Use Equalizer Mean-Square Error Register */ + /* SNR for ranges from -16.12 to +44.08 */ + noise = ((read_reg(state, LGDT3305_EQ_MSE_1) & 0x0f) << 16) | + (read_reg(state, LGDT3305_EQ_MSE_2) << 8) | + (read_reg(state, LGDT3305_EQ_MSE_3) & 0xff); + c = 73957994; /* log10(25*32^2)*2^24 */ +#endif + break; + case QAM_64: + case QAM_256: + noise = (read_reg(state, LGDT3305_CR_MSE_1) << 8) | + (read_reg(state, LGDT3305_CR_MSE_2) & 0xff); + + c = (state->current_modulation == QAM_64) ? + 97939837 : 98026066; + /* log10(688128)*2^24 and log10(696320)*2^24 */ + break; + default: + return -EINVAL; + } + state->snr = calculate_snr(noise, c); + /* report SNR in dB * 10 */ + *snr = (state->snr / ((1 << 24) / 10)); + lg_dbg("noise = 0x%08x, snr = %d.%02d dB\n", noise, + state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16); + + return 0; +} + +static int lgdt3305_read_signal_strength(struct dvb_frontend *fe, + u16 *strength) +{ + /* borrowed from lgdt330x.c + * + * Calculate strength from SNR up to 35dB + * Even though the SNR can go higher than 35dB, + * there is some comfort factor in having a range of + * strong signals that can show at 100% + */ + struct lgdt3305_state *state = fe->demodulator_priv; + u16 snr; + int ret; + + *strength = 0; + + ret = fe->ops.read_snr(fe, &snr); + if (lg_fail(ret)) + goto fail; + /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ + /* scale the range 0 - 35*2^24 into 0 - 65535 */ + if (state->snr >= 8960 * 0x10000) + *strength = 0xffff; + else + *strength = state->snr / 8960; +fail: + return ret; +} + +/* ------------------------------------------------------------------------ */ + +static int lgdt3305_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + *ber = 0; + return 0; +} + +static int lgdt3305_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + + *ucblocks = + (read_reg(state, LGDT3305_FEC_PKT_ERR_1) << 8) | + (read_reg(state, LGDT3305_FEC_PKT_ERR_2) & 0xff); + + return 0; +} + +static int lgdt3305_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings + *fe_tune_settings) +{ + fe_tune_settings->min_delay_ms = 500; + lg_dbg("\n"); + return 0; +} + +static void lgdt3305_release(struct dvb_frontend *fe) +{ + struct lgdt3305_state *state = fe->demodulator_priv; + lg_dbg("\n"); + kfree(state); +} + +static struct dvb_frontend_ops lgdt3305_ops; + +struct dvb_frontend *lgdt3305_attach(const struct lgdt3305_config *config, + struct i2c_adapter *i2c_adap) +{ + struct lgdt3305_state *state = NULL; + int ret; + u8 val; + + lg_dbg("(%d-%04x)\n", + i2c_adap ? i2c_adapter_id(i2c_adap) : 0, + config ? config->i2c_addr : 0); + + state = kzalloc(sizeof(struct lgdt3305_state), GFP_KERNEL); + if (state == NULL) + goto fail; + + state->cfg = config; + state->i2c_adap = i2c_adap; + + memcpy(&state->frontend.ops, &lgdt3305_ops, + sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + /* verify that we're talking to a lg dt3305 */ + ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_2, &val); + if ((lg_fail(ret)) | (val == 0)) + goto fail; + ret = lgdt3305_write_reg(state, 0x0808, 0x80); + if (lg_fail(ret)) + goto fail; + ret = lgdt3305_read_reg(state, 0x0808, &val); + if ((lg_fail(ret)) | (val != 0x80)) + goto fail; + ret = lgdt3305_write_reg(state, 0x0808, 0x00); + if (lg_fail(ret)) + goto fail; + + state->current_frequency = -1; + state->current_modulation = -1; + + return &state->frontend; +fail: + lg_warn("unable to detect LGDT3305 hardware\n"); + kfree(state); + return NULL; +} +EXPORT_SYMBOL(lgdt3305_attach); + +static struct dvb_frontend_ops lgdt3305_ops = { + .info = { + .name = "LG Electronics LGDT3305 VSB/QAM Frontend", + .type = FE_ATSC, + .frequency_min = 54000000, + .frequency_max = 858000000, + .frequency_stepsize = 62500, + .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB + }, + .i2c_gate_ctrl = lgdt3305_i2c_gate_ctrl, + .init = lgdt3305_init, + .sleep = lgdt3305_sleep, + .set_frontend = lgdt3305_set_parameters, + .get_frontend = lgdt3305_get_frontend, + .get_tune_settings = lgdt3305_get_tune_settings, + .read_status = lgdt3305_read_status, + .read_ber = lgdt3305_read_ber, + .read_signal_strength = lgdt3305_read_signal_strength, + .read_snr = lgdt3305_read_snr, + .read_ucblocks = lgdt3305_read_ucblocks, + .release = lgdt3305_release, +}; + +MODULE_DESCRIPTION("LG Electronics LGDT3305 ATSC/QAM-B Demodulator Driver"); +MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1"); + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |