diff options
Diffstat (limited to 'drivers/media/dvb/frontends/tda80xx.c')
| -rw-r--r-- | drivers/media/dvb/frontends/tda80xx.c | 734 |
1 files changed, 0 insertions, 734 deletions
diff --git a/drivers/media/dvb/frontends/tda80xx.c b/drivers/media/dvb/frontends/tda80xx.c deleted file mode 100644 index d1cabb6a0a1..00000000000 --- a/drivers/media/dvb/frontends/tda80xx.c +++ /dev/null @@ -1,734 +0,0 @@ -/* - * 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 <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <asm/irq.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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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); |