diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stv0299.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stv0299.c | 755 |
1 files changed, 755 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/stv0299.c b/drivers/media/dvb-frontends/stv0299.c new file mode 100644 index 000000000..da7ff2c2e --- /dev/null +++ b/drivers/media/dvb-frontends/stv0299.c @@ -0,0 +1,755 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + Driver for ST STV0299 demodulator + + Copyright (C) 2001-2002 Convergence Integrated Media GmbH + <ralph@convergence.de>, + <holger@convergence.de>, + <js@convergence.de> + + + Philips SU1278/SH + + Copyright (C) 2002 by Peter Schildmann <peter.schildmann@web.de> + + + LG TDQF-S001F + + Copyright (C) 2002 Felix Domke <tmbinc@elitedvb.net> + & Andreas Oberritter <obi@linuxtv.org> + + + Support for Samsung TBMU24112IMB used on Technisat SkyStar2 rev. 2.6B + + Copyright (C) 2003 Vadim Catana <skystar@moldova.cc>: + + Support for Philips SU1278 on Technotrend hardware + + Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net> + + +*/ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/ktime.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/jiffies.h> +#include <asm/div64.h> + +#include <media/dvb_frontend.h> +#include "stv0299.h" + +struct stv0299_state { + struct i2c_adapter* i2c; + const struct stv0299_config* config; + struct dvb_frontend frontend; + + u8 initialised:1; + u32 tuner_frequency; + u32 symbol_rate; + enum fe_code_rate fec_inner; + int errmode; + u32 ucblocks; + u8 mcr_reg; +}; + +#define STATUS_BER 0 +#define STATUS_UCBLOCKS 1 + +static int debug; +static int debug_legacy_dish_switch; +#define dprintk(args...) \ + do { \ + if (debug) printk(KERN_DEBUG "stv0299: " args); \ + } while (0) + + +static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data) +{ + int ret; + u8 buf [] = { reg, data }; + struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; + + ret = i2c_transfer (state->i2c, &msg, 1); + + if (ret != 1) + dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n", + __func__, reg, data, ret); + + return (ret != 1) ? -EREMOTEIO : 0; +} + +static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len) +{ + struct stv0299_state* state = fe->demodulator_priv; + + if (len != 2) + return -EINVAL; + + return stv0299_writeregI(state, buf[0], buf[1]); +} + +static u8 stv0299_readreg (struct stv0299_state* state, u8 reg) +{ + int ret; + u8 b0 [] = { reg }; + u8 b1 [] = { 0 }; + struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } }; + + ret = i2c_transfer (state->i2c, msg, 2); + + if (ret != 2) + dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", + __func__, reg, ret); + + return b1[0]; +} + +static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len) +{ + int ret; + struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } }; + + ret = i2c_transfer (state->i2c, msg, 2); + + if (ret != 2) + dprintk("%s: readreg error (ret == %i)\n", __func__, ret); + + return ret == 2 ? 0 : ret; +} + +static int stv0299_set_FEC(struct stv0299_state *state, enum fe_code_rate fec) +{ + dprintk ("%s\n", __func__); + + switch (fec) { + case FEC_AUTO: + { + return stv0299_writeregI (state, 0x31, 0x1f); + } + case FEC_1_2: + { + return stv0299_writeregI (state, 0x31, 0x01); + } + case FEC_2_3: + { + return stv0299_writeregI (state, 0x31, 0x02); + } + case FEC_3_4: + { + return stv0299_writeregI (state, 0x31, 0x04); + } + case FEC_5_6: + { + return stv0299_writeregI (state, 0x31, 0x08); + } + case FEC_7_8: + { + return stv0299_writeregI (state, 0x31, 0x10); + } + default: + { + return -EINVAL; + } + } +} + +static enum fe_code_rate stv0299_get_fec(struct stv0299_state *state) +{ + static const enum fe_code_rate fec_tab[] = { + FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_1_2 + }; + u8 index; + + dprintk ("%s\n", __func__); + + index = stv0299_readreg (state, 0x1b); + index &= 0x7; + + if (index > 4) + return FEC_AUTO; + + return fec_tab [index]; +} + +static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout) +{ + unsigned long start = jiffies; + + dprintk ("%s\n", __func__); + + while (stv0299_readreg(state, 0x0a) & 1) { + if (time_is_before_jiffies(start + timeout)) { + dprintk ("%s: timeout!!\n", __func__); + return -ETIMEDOUT; + } + msleep(10); + } + + return 0; +} + +static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout) +{ + unsigned long start = jiffies; + + dprintk ("%s\n", __func__); + + while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) { + if (time_is_before_jiffies(start + timeout)) { + dprintk ("%s: timeout!!\n", __func__); + return -ETIMEDOUT; + } + msleep(10); + } + + return 0; +} + +static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate) +{ + struct stv0299_state* state = fe->demodulator_priv; + u64 big = srate; + u32 ratio; + + // check rate is within limits + if ((srate < 1000000) || (srate > 45000000)) return -EINVAL; + + // calculate value to program + big = big << 20; + big += (state->config->mclk-1); // round correctly + do_div(big, state->config->mclk); + ratio = big << 4; + + return state->config->set_symbol_rate(fe, srate, ratio); +} + +static int stv0299_get_symbolrate (struct stv0299_state* state) +{ + u32 Mclk = state->config->mclk / 4096L; + u32 srate; + s32 offset; + u8 sfr[3]; + s8 rtf; + + dprintk ("%s\n", __func__); + + stv0299_readregs (state, 0x1f, sfr, 3); + stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1); + + srate = (sfr[0] << 8) | sfr[1]; + srate *= Mclk; + srate /= 16; + srate += (sfr[2] >> 4) * Mclk / 256; + offset = (s32) rtf * (srate / 4096L); + offset /= 128; + + dprintk ("%s : srate = %i\n", __func__, srate); + dprintk ("%s : ofset = %i\n", __func__, offset); + + srate += offset; + + srate += 1000; + srate /= 2000; + srate *= 2000; + + return srate; +} + +static int stv0299_send_diseqc_msg (struct dvb_frontend* fe, + struct dvb_diseqc_master_cmd *m) +{ + struct stv0299_state* state = fe->demodulator_priv; + u8 val; + int i; + + dprintk ("%s\n", __func__); + + if (stv0299_wait_diseqc_idle (state, 100) < 0) + return -ETIMEDOUT; + + val = stv0299_readreg (state, 0x08); + + if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6)) /* DiSEqC mode */ + return -EREMOTEIO; + + for (i=0; i<m->msg_len; i++) { + if (stv0299_wait_diseqc_fifo (state, 100) < 0) + return -ETIMEDOUT; + + if (stv0299_writeregI (state, 0x09, m->msg[i])) + return -EREMOTEIO; + } + + if (stv0299_wait_diseqc_idle (state, 100) < 0) + return -ETIMEDOUT; + + return 0; +} + +static int stv0299_send_diseqc_burst(struct dvb_frontend *fe, + enum fe_sec_mini_cmd burst) +{ + struct stv0299_state* state = fe->demodulator_priv; + u8 val; + + dprintk ("%s\n", __func__); + + if (stv0299_wait_diseqc_idle (state, 100) < 0) + return -ETIMEDOUT; + + val = stv0299_readreg (state, 0x08); + + if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2)) /* burst mode */ + return -EREMOTEIO; + + if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff)) + return -EREMOTEIO; + + if (stv0299_wait_diseqc_idle (state, 100) < 0) + return -ETIMEDOUT; + + if (stv0299_writeregI (state, 0x08, val)) + return -EREMOTEIO; + + return 0; +} + +static int stv0299_set_tone(struct dvb_frontend *fe, + enum fe_sec_tone_mode tone) +{ + struct stv0299_state* state = fe->demodulator_priv; + u8 val; + + if (stv0299_wait_diseqc_idle (state, 100) < 0) + return -ETIMEDOUT; + + val = stv0299_readreg (state, 0x08); + + switch (tone) { + case SEC_TONE_ON: + return stv0299_writeregI (state, 0x08, val | 0x3); + + case SEC_TONE_OFF: + return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02); + + default: + return -EINVAL; + } +} + +static int stv0299_set_voltage(struct dvb_frontend *fe, + enum fe_sec_voltage voltage) +{ + struct stv0299_state* state = fe->demodulator_priv; + u8 reg0x08; + u8 reg0x0c; + + dprintk("%s: %s\n", __func__, + voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" : + voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??"); + + reg0x08 = stv0299_readreg (state, 0x08); + reg0x0c = stv0299_readreg (state, 0x0c); + + /* + * H/V switching over OP0, OP1 and OP2 are LNB power enable bits + */ + reg0x0c &= 0x0f; + reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6); + + switch (voltage) { + case SEC_VOLTAGE_13: + if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0) + reg0x0c |= 0x10; /* OP1 off, OP0 on */ + else + reg0x0c |= 0x40; /* OP1 on, OP0 off */ + break; + case SEC_VOLTAGE_18: + reg0x0c |= 0x50; /* OP1 on, OP0 on */ + break; + case SEC_VOLTAGE_OFF: + /* LNB power off! */ + reg0x08 = 0x00; + reg0x0c = 0x00; + break; + default: + return -EINVAL; + } + + if (state->config->op0_off) + reg0x0c &= ~0x10; + + stv0299_writeregI(state, 0x08, reg0x08); + return stv0299_writeregI(state, 0x0c, reg0x0c); +} + +static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd) +{ + struct stv0299_state* state = fe->demodulator_priv; + u8 reg0x08; + u8 reg0x0c; + u8 lv_mask = 0x40; + u8 last = 1; + int i; + ktime_t nexttime; + ktime_t tv[10]; + + reg0x08 = stv0299_readreg (state, 0x08); + reg0x0c = stv0299_readreg (state, 0x0c); + reg0x0c &= 0x0f; + stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6)); + if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0) + lv_mask = 0x10; + + cmd = cmd << 1; + if (debug_legacy_dish_switch) + printk ("%s switch command: 0x%04lx\n",__func__, cmd); + + nexttime = ktime_get_boottime(); + if (debug_legacy_dish_switch) + tv[0] = nexttime; + stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */ + + dvb_frontend_sleep_until(&nexttime, 32000); + + for (i=0; i<9; i++) { + if (debug_legacy_dish_switch) + tv[i+1] = ktime_get_boottime(); + if((cmd & 0x01) != last) { + /* set voltage to (last ? 13V : 18V) */ + stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50)); + last = (last) ? 0 : 1; + } + + cmd = cmd >> 1; + + if (i != 8) + dvb_frontend_sleep_until(&nexttime, 8000); + } + if (debug_legacy_dish_switch) { + printk ("%s(%d): switch delay (should be 32k followed by all 8k\n", + __func__, fe->dvb->num); + for (i = 1; i < 10; i++) + printk("%d: %d\n", i, + (int) ktime_us_delta(tv[i], tv[i-1])); + } + + return 0; +} + +static int stv0299_init (struct dvb_frontend* fe) +{ + struct stv0299_state* state = fe->demodulator_priv; + int i; + u8 reg; + u8 val; + + dprintk("stv0299: init chip\n"); + + stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg); + msleep(50); + + for (i = 0; ; i += 2) { + reg = state->config->inittab[i]; + val = state->config->inittab[i+1]; + if (reg == 0xff && val == 0xff) + break; + if (reg == 0x0c && state->config->op0_off) + val &= ~0x10; + if (reg == 0x2) + state->mcr_reg = val & 0xf; + stv0299_writeregI(state, reg, val); + } + + return 0; +} + +static int stv0299_read_status(struct dvb_frontend *fe, + enum fe_status *status) +{ + struct stv0299_state* state = fe->demodulator_priv; + + u8 signal = 0xff - stv0299_readreg (state, 0x18); + u8 sync = stv0299_readreg (state, 0x1b); + + dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync); + *status = 0; + + if (signal > 10) + *status |= FE_HAS_SIGNAL; + + if (sync & 0x80) + *status |= FE_HAS_CARRIER; + + if (sync & 0x10) + *status |= FE_HAS_VITERBI; + + if (sync & 0x08) + *status |= FE_HAS_SYNC; + + if ((sync & 0x98) == 0x98) + *status |= FE_HAS_LOCK; + + return 0; +} + +static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct stv0299_state* state = fe->demodulator_priv; + + if (state->errmode != STATUS_BER) + return -ENOSYS; + + *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8); + + return 0; +} + +static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct stv0299_state* state = fe->demodulator_priv; + + s32 signal = 0xffff - ((stv0299_readreg (state, 0x18) << 8) + | stv0299_readreg (state, 0x19)); + + dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__, + stv0299_readreg (state, 0x18), + stv0299_readreg (state, 0x19), (int) signal); + + signal = signal * 5 / 4; + *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal; + + return 0; +} + +static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct stv0299_state* state = fe->demodulator_priv; + + s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8) + | stv0299_readreg (state, 0x25)); + xsnr = 3 * (xsnr - 0xa100); + *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr; + + return 0; +} + +static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct stv0299_state* state = fe->demodulator_priv; + + if (state->errmode != STATUS_UCBLOCKS) + return -ENOSYS; + + state->ucblocks += stv0299_readreg(state, 0x1e); + state->ucblocks += (stv0299_readreg(state, 0x1d) << 8); + *ucblocks = state->ucblocks; + + return 0; +} + +static int stv0299_set_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct stv0299_state* state = fe->demodulator_priv; + int invval = 0; + + dprintk ("%s : FE_SET_FRONTEND\n", __func__); + if (state->config->set_ts_params) + state->config->set_ts_params(fe, 0); + + // set the inversion + if (p->inversion == INVERSION_OFF) invval = 0; + else if (p->inversion == INVERSION_ON) invval = 1; + else { + printk("stv0299 does not support auto-inversion\n"); + return -EINVAL; + } + if (state->config->invert) invval = (~invval) & 1; + stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval); + + if (fe->ops.tuner_ops.set_params) { + fe->ops.tuner_ops.set_params(fe); + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); + } + + stv0299_set_FEC(state, p->fec_inner); + stv0299_set_symbolrate(fe, p->symbol_rate); + stv0299_writeregI(state, 0x22, 0x00); + stv0299_writeregI(state, 0x23, 0x00); + + state->tuner_frequency = p->frequency; + state->fec_inner = p->fec_inner; + state->symbol_rate = p->symbol_rate; + + return 0; +} + +static int stv0299_get_frontend(struct dvb_frontend *fe, + struct dtv_frontend_properties *p) +{ + struct stv0299_state* state = fe->demodulator_priv; + s32 derot_freq; + int invval; + + derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8) + | stv0299_readreg (state, 0x23)); + + derot_freq *= (state->config->mclk >> 16); + derot_freq += 500; + derot_freq /= 1000; + + p->frequency += derot_freq; + + invval = stv0299_readreg (state, 0x0c) & 1; + if (state->config->invert) invval = (~invval) & 1; + p->inversion = invval ? INVERSION_ON : INVERSION_OFF; + + p->fec_inner = stv0299_get_fec(state); + p->symbol_rate = stv0299_get_symbolrate(state); + + return 0; +} + +static int stv0299_sleep(struct dvb_frontend* fe) +{ + struct stv0299_state* state = fe->demodulator_priv; + + stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg); + state->initialised = 0; + + return 0; +} + +static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct stv0299_state* state = fe->demodulator_priv; + + if (enable) { + stv0299_writeregI(state, 0x05, 0xb5); + } else { + stv0299_writeregI(state, 0x05, 0x35); + } + udelay(1); + return 0; +} + +static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings) +{ + struct stv0299_state* state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + + fesettings->min_delay_ms = state->config->min_delay_ms; + if (p->symbol_rate < 10000000) { + fesettings->step_size = p->symbol_rate / 32000; + fesettings->max_drift = 5000; + } else { + fesettings->step_size = p->symbol_rate / 16000; + fesettings->max_drift = p->symbol_rate / 2000; + } + return 0; +} + +static void stv0299_release(struct dvb_frontend* fe) +{ + struct stv0299_state* state = fe->demodulator_priv; + kfree(state); +} + +static const struct dvb_frontend_ops stv0299_ops; + +struct dvb_frontend* stv0299_attach(const struct stv0299_config* config, + struct i2c_adapter* i2c) +{ + struct stv0299_state* state = NULL; + int id; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + state->initialised = 0; + state->tuner_frequency = 0; + state->symbol_rate = 0; + state->fec_inner = 0; + state->errmode = STATUS_BER; + + /* check if the demod is there */ + stv0299_writeregI(state, 0x02, 0x30); /* standby off */ + msleep(200); + id = stv0299_readreg(state, 0x00); + + /* register 0x00 contains 0xa1 for STV0299 and STV0299B */ + /* register 0x00 might contain 0x80 when returning from standby */ + if (id != 0xa1 && id != 0x80) goto error; + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static const struct dvb_frontend_ops stv0299_ops = { + .delsys = { SYS_DVBS }, + .info = { + .name = "ST STV0299 DVB-S", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + .frequency_stepsize_hz = 125 * kHz, + .symbol_rate_min = 1000000, + .symbol_rate_max = 45000000, + .symbol_rate_tolerance = 500, /* ppm */ + .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_QPSK | + FE_CAN_FEC_AUTO + }, + + .release = stv0299_release, + + .init = stv0299_init, + .sleep = stv0299_sleep, + .write = stv0299_write, + .i2c_gate_ctrl = stv0299_i2c_gate_ctrl, + + .set_frontend = stv0299_set_frontend, + .get_frontend = stv0299_get_frontend, + .get_tune_settings = stv0299_get_tune_settings, + + .read_status = stv0299_read_status, + .read_ber = stv0299_read_ber, + .read_signal_strength = stv0299_read_signal_strength, + .read_snr = stv0299_read_snr, + .read_ucblocks = stv0299_read_ucblocks, + + .diseqc_send_master_cmd = stv0299_send_diseqc_msg, + .diseqc_send_burst = stv0299_send_diseqc_burst, + .set_tone = stv0299_set_tone, + .set_voltage = stv0299_set_voltage, + .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd, +}; + +module_param(debug_legacy_dish_switch, int, 0444); +MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches"); + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver"); +MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL_GPL(stv0299_attach); |