diff options
Diffstat (limited to 'drivers/media/dvb/frontends/tda80xx.c')
| -rw-r--r-- | drivers/media/dvb/frontends/tda80xx.c | 734 |
1 files changed, 734 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/tda80xx.c b/drivers/media/dvb/frontends/tda80xx.c new file mode 100644 index 0000000..c996321 --- /dev/null +++ b/drivers/media/dvb/frontends/tda80xx.c @@ -0,0 +1,734 @@ +/* + * tda80xx.c + * + * Philips TDA8044 / TDA8083 QPSK demodulator driver + * + * Copyright (C) 2001 Felix Domke <tmbinc@elitedvb.net> + * Copyright (C) 2002-2004 Andreas Oberritter <obi@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/config.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/threads.h> +#include <linux/interrupt.h> +#include <asm/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <asm/div64.h> + +#include "dvb_frontend.h" +#include "tda80xx.h" + +enum { + ID_TDA8044 = 0x04, + ID_TDA8083 = 0x05, +}; + + +struct tda80xx_state { + + struct i2c_adapter* i2c; + + struct dvb_frontend_ops ops; + + /* configuration settings */ + const struct tda80xx_config* config; + + struct dvb_frontend frontend; + + u32 clk; + int afc_loop; + struct work_struct worklet; + fe_code_rate_t code_rate; + fe_spectral_inversion_t spectral_inversion; + fe_status_t status; + u8 id; +}; + +static int debug = 1; +#define dprintk if (debug) printk + +static u8 tda8044_inittab_pre[] = { + 0x02, 0x00, 0x6f, 0xb5, 0x86, 0x22, 0x00, 0xea, + 0x30, 0x42, 0x98, 0x68, 0x70, 0x42, 0x99, 0x58, + 0x95, 0x10, 0xf5, 0xe7, 0x93, 0x0b, 0x15, 0x68, + 0x9a, 0x90, 0x61, 0x80, 0x00, 0xe0, 0x40, 0x00, + 0x0f, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00 +}; + +static u8 tda8044_inittab_post[] = { + 0x04, 0x00, 0x6f, 0xb5, 0x86, 0x22, 0x00, 0xea, + 0x30, 0x42, 0x98, 0x68, 0x70, 0x42, 0x99, 0x50, + 0x95, 0x10, 0xf5, 0xe7, 0x93, 0x0b, 0x15, 0x68, + 0x9a, 0x90, 0x61, 0x80, 0x00, 0xe0, 0x40, 0x6c, + 0x0f, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00 +}; + +static u8 tda8083_inittab[] = { + 0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea, + 0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10, + 0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8, + 0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00, + 0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 +}; + +static __inline__ u32 tda80xx_div(u32 a, u32 b) +{ + return (a + (b / 2)) / b; +} + +static __inline__ u32 tda80xx_gcd(u32 a, u32 b) +{ + u32 r; + + while ((r = a % b)) { + a = b; + b = r; + } + + return b; +} + +static int tda80xx_read(struct tda80xx_state* state, u8 reg, u8 *buf, u8 len) +{ + int ret; + struct i2c_msg msg[] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®, .len = 1 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf, .len = len } }; + + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) + dprintk("%s: readreg error (reg %02x, ret == %i)\n", + __FUNCTION__, reg, ret); + + mdelay(10); + + return (ret == 2) ? 0 : -EREMOTEIO; +} + +static int tda80xx_write(struct tda80xx_state* state, u8 reg, const u8 *buf, u8 len) +{ + int ret; + u8 wbuf[len + 1]; + struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = wbuf, .len = len + 1 }; + + wbuf[0] = reg; + memcpy(&wbuf[1], buf, len); + + ret = i2c_transfer(state->i2c, &msg, 1); + + if (ret != 1) + dprintk("%s: i2c xfer error (ret == %i)\n", __FUNCTION__, ret); + + mdelay(10); + + return (ret == 1) ? 0 : -EREMOTEIO; +} + +static __inline__ u8 tda80xx_readreg(struct tda80xx_state* state, u8 reg) +{ + u8 val; + + tda80xx_read(state, reg, &val, 1); + + return val; +} + +static __inline__ int tda80xx_writereg(struct tda80xx_state* state, u8 reg, u8 data) +{ + return tda80xx_write(state, reg, &data, 1); +} + +static int tda80xx_set_parameters(struct tda80xx_state* state, + fe_spectral_inversion_t inversion, + u32 symbol_rate, + fe_code_rate_t fec_inner) +{ + u8 buf[15]; + u64 ratio; + u32 clk; + u32 k; + u32 sr = symbol_rate; + u32 gcd; + u8 scd; + + if (symbol_rate > (state->clk * 3) / 16) + scd = 0; + else if (symbol_rate > (state->clk * 3) / 32) + scd = 1; + else if (symbol_rate > (state->clk * 3) / 64) + scd = 2; + else + scd = 3; + + clk = scd ? (state->clk / (scd * 2)) : state->clk; + + /* + * Viterbi decoder: + * Differential decoding off + * Spectral inversion unknown + * QPSK modulation + */ + if (inversion == INVERSION_ON) + buf[0] = 0x60; + else if (inversion == INVERSION_OFF) + buf[0] = 0x20; + else + buf[0] = 0x00; + + /* + * CLK ratio: + * system clock frequency is up to 64 or 96 MHz + * + * formula: + * r = k * clk / symbol_rate + * + * k: 2^21 for caa 0..3, + * 2^20 for caa 4..5, + * 2^19 for caa 6..7 + */ + if (symbol_rate <= (clk * 3) / 32) + k = (1 << 19); + else if (symbol_rate <= (clk * 3) / 16) + k = (1 << 20); + else + k = (1 << 21); + + gcd = tda80xx_gcd(clk, sr); + clk /= gcd; + sr /= gcd; + + gcd = tda80xx_gcd(k, sr); + k /= gcd; + sr /= gcd; + + ratio = (u64)k * (u64)clk; + do_div(ratio, sr); + + buf[1] = ratio >> 16; + buf[2] = ratio >> 8; + buf[3] = ratio; + + /* nyquist filter roll-off factor 35% */ + buf[4] = 0x20; + + clk = scd ? (state->clk / (scd * 2)) : state->clk; + + /* Anti Alias Filter */ + if (symbol_rate < (clk * 3) / 64) + printk("tda80xx: unsupported symbol rate: %u\n", symbol_rate); + else if (symbol_rate <= clk / 16) + buf[4] |= 0x07; + else if (symbol_rate <= (clk * 3) / 32) + buf[4] |= 0x06; + else if (symbol_rate <= clk / 8) + buf[4] |= 0x05; + else if (symbol_rate <= (clk * 3) / 16) + buf[4] |= 0x04; + else if (symbol_rate <= clk / 4) + buf[4] |= 0x03; + else if (symbol_rate <= (clk * 3) / 8) + buf[4] |= 0x02; + else if (symbol_rate <= clk / 2) + buf[4] |= 0x01; + else + buf[4] |= 0x00; + + /* Sigma Delta converter */ + buf[5] = 0x00; + + /* FEC: Possible puncturing rates */ + if (fec_inner == FEC_NONE) + buf[6] = 0x00; + else if ((fec_inner >= FEC_1_2) && (fec_inner <= FEC_8_9)) + buf[6] = (1 << (8 - fec_inner)); + else if (fec_inner == FEC_AUTO) + buf[6] = 0xff; + else + return -EINVAL; + + /* carrier lock detector threshold value */ + buf[7] = 0x30; + /* AFC1: proportional part settings */ + buf[8] = 0x42; + /* AFC1: integral part settings */ + buf[9] = 0x98; + /* PD: Leaky integrator SCPC mode */ + buf[10] = 0x28; + /* AFC2, AFC1 controls */ + buf[11] = 0x30; + /* PD: proportional part settings */ + buf[12] = 0x42; + /* PD: integral part settings */ + buf[13] = 0x99; + /* AGC */ + buf[14] = 0x50 | scd; + + printk("symbol_rate=%u clk=%u\n", symbol_rate, clk); + + return tda80xx_write(state, 0x01, buf, sizeof(buf)); +} + +static int tda80xx_set_clk(struct tda80xx_state* state) +{ + u8 buf[2]; + + /* CLK proportional part */ + buf[0] = (0x06 << 5) | 0x08; /* CMP[2:0], CSP[4:0] */ + /* CLK integral part */ + buf[1] = (0x04 << 5) | 0x1a; /* CMI[2:0], CSI[4:0] */ + + return tda80xx_write(state, 0x17, buf, sizeof(buf)); +} + +#if 0 +static int tda80xx_set_scpc_freq_offset(struct tda80xx_state* state) +{ + /* a constant value is nonsense here imho */ + return tda80xx_writereg(state, 0x22, 0xf9); +} +#endif + +static int tda80xx_close_loop(struct tda80xx_state* state) +{ + u8 buf[2]; + + /* PD: Loop closed, LD: lock detect enable, SCPC: Sweep mode - AFC1 loop closed */ + buf[0] = 0x68; + /* AFC1: Loop closed, CAR Feedback: 8192 */ + buf[1] = 0x70; + + return tda80xx_write(state, 0x0b, buf, sizeof(buf)); +} + +static irqreturn_t tda80xx_irq(int irq, void *priv, struct pt_regs *pt) +{ + schedule_work(priv); + + return IRQ_HANDLED; +} + +static void tda80xx_read_status_int(struct tda80xx_state* state) +{ + u8 val; + + static const fe_spectral_inversion_t inv_tab[] = { + INVERSION_OFF, INVERSION_ON + }; + + static const fe_code_rate_t fec_tab[] = { + FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4, + FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8, + }; + + val = tda80xx_readreg(state, 0x02); + + state->status = 0; + + if (val & 0x01) /* demodulator lock */ + state->status |= FE_HAS_SIGNAL; + if (val & 0x02) /* clock recovery lock */ + state->status |= FE_HAS_CARRIER; + if (val & 0x04) /* viterbi lock */ + state->status |= FE_HAS_VITERBI; + if (val & 0x08) /* deinterleaver lock (packet sync) */ + state->status |= FE_HAS_SYNC; + if (val & 0x10) /* derandomizer lock (frame sync) */ + state->status |= FE_HAS_LOCK; + if (val & 0x20) /* frontend can not lock */ + state->status |= FE_TIMEDOUT; + + if ((state->status & (FE_HAS_CARRIER)) && (state->afc_loop)) { + printk("tda80xx: closing loop\n"); + tda80xx_close_loop(state); + state->afc_loop = 0; + } + + if (state->status & (FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK)) { + val = tda80xx_readreg(state, 0x0e); + state->code_rate = fec_tab[val & 0x07]; + if (state->status & (FE_HAS_SYNC | FE_HAS_LOCK)) + state->spectral_inversion = inv_tab[(val >> 7) & 0x01]; + else + state->spectral_inversion = INVERSION_AUTO; + } + else { + state->code_rate = FEC_AUTO; + } +} + +static void tda80xx_worklet(void *priv) +{ + struct tda80xx_state *state = priv; + + tda80xx_writereg(state, 0x00, 0x04); + enable_irq(state->config->irq); + + tda80xx_read_status_int(state); +} + +static void tda80xx_wait_diseqc_fifo(struct tda80xx_state* state) +{ + size_t i; + + for (i = 0; i < 100; i++) { + if (tda80xx_readreg(state, 0x02) & 0x80) + break; + msleep(10); + } +} + +static int tda8044_init(struct dvb_frontend* fe) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + int ret; + + /* + * this function is a mess... + */ + + if ((ret = tda80xx_write(state, 0x00, tda8044_inittab_pre, sizeof(tda8044_inittab_pre)))) + return ret; + + tda80xx_writereg(state, 0x0f, 0x50); +#if 1 + tda80xx_writereg(state, 0x20, 0x8F); /* FIXME */ + tda80xx_writereg(state, 0x20, state->config->volt18setting); /* FIXME */ + //tda80xx_writereg(state, 0x00, 0x04); + tda80xx_writereg(state, 0x00, 0x0C); +#endif + //tda80xx_writereg(state, 0x00, 0x08); /* Reset AFC1 loop filter */ + + tda80xx_write(state, 0x00, tda8044_inittab_post, sizeof(tda8044_inittab_post)); + + if (state->config->pll_init) { + tda80xx_writereg(state, 0x1c, 0x80); + state->config->pll_init(fe); + tda80xx_writereg(state, 0x1c, 0x00); + } + + return 0; +} + +static int tda8083_init(struct dvb_frontend* fe) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + tda80xx_write(state, 0x00, tda8083_inittab, sizeof(tda8083_inittab)); + + if (state->config->pll_init) { + tda80xx_writereg(state, 0x1c, 0x80); + state->config->pll_init(fe); + tda80xx_writereg(state, 0x1c, 0x00); + } + + return 0; +} + +static int tda80xx_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + switch (voltage) { + case SEC_VOLTAGE_13: + return tda80xx_writereg(state, 0x20, state->config->volt13setting); + case SEC_VOLTAGE_18: + return tda80xx_writereg(state, 0x20, state->config->volt18setting); + case SEC_VOLTAGE_OFF: + return tda80xx_writereg(state, 0x20, 0); + default: + return -EINVAL; + } +} + +static int tda80xx_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + switch (tone) { + case SEC_TONE_OFF: + return tda80xx_writereg(state, 0x29, 0x00); + case SEC_TONE_ON: + return tda80xx_writereg(state, 0x29, 0x80); + default: + return -EINVAL; + } +} + +static int tda80xx_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + if (cmd->msg_len > 6) + return -EINVAL; + + tda80xx_writereg(state, 0x29, 0x08 | (cmd->msg_len - 3)); + tda80xx_write(state, 0x23, cmd->msg, cmd->msg_len); + tda80xx_writereg(state, 0x29, 0x0c | (cmd->msg_len - 3)); + tda80xx_wait_diseqc_fifo(state); + + return 0; +} + +static int tda80xx_send_diseqc_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t cmd) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + switch (cmd) { + case SEC_MINI_A: + tda80xx_writereg(state, 0x29, 0x14); + break; + case SEC_MINI_B: + tda80xx_writereg(state, 0x29, 0x1c); + break; + default: + return -EINVAL; + } + + tda80xx_wait_diseqc_fifo(state); + + return 0; +} + +static int tda80xx_sleep(struct dvb_frontend* fe) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + tda80xx_writereg(state, 0x00, 0x02); /* enter standby */ + + return 0; +} + +static int tda80xx_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + tda80xx_writereg(state, 0x1c, 0x80); + state->config->pll_set(fe, p); + tda80xx_writereg(state, 0x1c, 0x00); + + tda80xx_set_parameters(state, p->inversion, p->u.qpsk.symbol_rate, p->u.qpsk.fec_inner); + tda80xx_set_clk(state); + //tda80xx_set_scpc_freq_offset(state); + state->afc_loop = 1; + + return 0; +} + +static int tda80xx_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + if (!state->config->irq) + tda80xx_read_status_int(state); + + p->inversion = state->spectral_inversion; + p->u.qpsk.fec_inner = state->code_rate; + + return 0; +} + +static int tda80xx_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + if (!state->config->irq) + tda80xx_read_status_int(state); + *status = state->status; + + return 0; +} + +static int tda80xx_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + int ret; + u8 buf[3]; + + if ((ret = tda80xx_read(state, 0x0b, buf, sizeof(buf)))) + return ret; + + *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2]; + + return 0; +} + +static int tda80xx_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + u8 gain = ~tda80xx_readreg(state, 0x01); + *strength = (gain << 8) | gain; + + return 0; +} + +static int tda80xx_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + u8 quality = tda80xx_readreg(state, 0x08); + *snr = (quality << 8) | quality; + + return 0; +} + +static int tda80xx_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + *ucblocks = tda80xx_readreg(state, 0x0f); + if (*ucblocks == 0xff) + *ucblocks = 0xffffffff; + + return 0; +} + +static int tda80xx_init(struct dvb_frontend* fe) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + switch(state->id) { + case ID_TDA8044: + return tda8044_init(fe); + + case ID_TDA8083: + return tda8083_init(fe); + } + return 0; +} + +static void tda80xx_release(struct dvb_frontend* fe) +{ + struct tda80xx_state* state = (struct tda80xx_state*) fe->demodulator_priv; + + if (state->config->irq) + free_irq(state->config->irq, &state->worklet); + + kfree(state); +} + +static struct dvb_frontend_ops tda80xx_ops; + +struct dvb_frontend* tda80xx_attach(const struct tda80xx_config* config, + struct i2c_adapter* i2c) +{ + struct tda80xx_state* state = NULL; + int ret; + + /* allocate memory for the internal state */ + state = (struct tda80xx_state*) kmalloc(sizeof(struct tda80xx_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + memcpy(&state->ops, &tda80xx_ops, sizeof(struct dvb_frontend_ops)); + state->spectral_inversion = INVERSION_AUTO; + state->code_rate = FEC_AUTO; + state->status = 0; + state->afc_loop = 0; + + /* check if the demod is there */ + if (tda80xx_writereg(state, 0x89, 0x00) < 0) goto error; + state->id = tda80xx_readreg(state, 0x00); + + switch (state->id) { + case ID_TDA8044: + state->clk = 96000000; + printk("tda80xx: Detected tda8044\n"); + break; + + case ID_TDA8083: + state->clk = 64000000; + printk("tda80xx: Detected tda8083\n"); + break; + + default: + goto error; + } + + /* setup IRQ */ + if (state->config->irq) { + INIT_WORK(&state->worklet, tda80xx_worklet, state); + if ((ret = request_irq(state->config->irq, tda80xx_irq, SA_ONESHOT, "tda80xx", &state->worklet)) < 0) { + printk(KERN_ERR "tda80xx: request_irq failed (%d)\n", ret); + goto error; + } + } + + /* create dvb_frontend */ + state->frontend.ops = &state->ops; + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static struct dvb_frontend_ops tda80xx_ops = { + + .info = { + .name = "Philips TDA80xx DVB-S", + .type = FE_QPSK, + .frequency_min = 500000, + .frequency_max = 2700000, + .frequency_stepsize = 125, + .symbol_rate_min = 4500000, + .symbol_rate_max = 45000000, + .caps = FE_CAN_INVERSION_AUTO | + FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | + FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | + FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO | + FE_CAN_QPSK | + FE_CAN_MUTE_TS + }, + + .release = tda80xx_release, + + .init = tda80xx_init, + .sleep = tda80xx_sleep, + + .set_frontend = tda80xx_set_frontend, + .get_frontend = tda80xx_get_frontend, + + .read_status = tda80xx_read_status, + .read_ber = tda80xx_read_ber, + .read_signal_strength = tda80xx_read_signal_strength, + .read_snr = tda80xx_read_snr, + .read_ucblocks = tda80xx_read_ucblocks, + + .diseqc_send_master_cmd = tda80xx_send_diseqc_msg, + .diseqc_send_burst = tda80xx_send_diseqc_burst, + .set_tone = tda80xx_set_tone, + .set_voltage = tda80xx_set_voltage, +}; + +module_param(debug, int, 0644); + +MODULE_DESCRIPTION("Philips TDA8044 / TDA8083 DVB-S Demodulator driver"); +MODULE_AUTHOR("Felix Domke, Andreas Oberritter"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(tda80xx_attach); |
