diff options
Diffstat (limited to 'linux/drivers/media/dvb/frontends/s5h1420.c')
| -rw-r--r-- | linux/drivers/media/dvb/frontends/s5h1420.c | 682 |
1 files changed, 682 insertions, 0 deletions
diff --git a/linux/drivers/media/dvb/frontends/s5h1420.c b/linux/drivers/media/dvb/frontends/s5h1420.c new file mode 100644 index 000000000..587718fa3 --- /dev/null +++ b/linux/drivers/media/dvb/frontends/s5h1420.c @@ -0,0 +1,682 @@ +/* +Driver for Samsung S5H1420 QPSK Demodulator + +Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net> + +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/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/delay.h> + +#include "dvb_frontend.h" +#include "s5h1420.h" + + +struct s5h1420_state { + struct i2c_adapter* i2c; + struct dvb_frontend_ops ops; + const struct s5h1420_config* config; + struct dvb_frontend frontend; + + u8 postlocked:1; + u32 fclk; + u32 tunedfreq; +}; + +static u32 s5h1420_getsymbolrate(struct s5h1420_state* state); + + +static int debug = 0; +#define dprintk if (debug) printk + +static int s5h1420_writereg (struct s5h1420_state* state, u8 reg, u8 data) +{ + u8 buf [] = { reg, data }; + struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 3 }; + int err; + + if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { + dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __FUNCTION__, err, reg, data); + return -EREMOTEIO; + } + + return 0; +} + +static u8 s5h1420_readreg (struct s5h1420_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 = 2 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } }; + + ret = i2c_transfer (state->i2c, msg, 2); + + if (ret != 2) return ret; + + return b1[0]; +} + +static int s5h1420_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + switch(voltage) { + case SEC_VOLTAGE_13: + s5h1420_writereg(state, 0x3c, (s5h1420_readreg(state, 0x3c) & 0xfe) | 0x02); + break; + + case SEC_VOLTAGE_18: + s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) | 0x03); + break; + + case SEC_VOLTAGE_OFF: + s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) & 0xfd); + break; + } + + return 0; +} + +static int s5h1420_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + switch(tone) { + case SEC_TONE_ON: + s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x74) | 0x08); + break; + + case SEC_TONE_OFF: + s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01); + break; + } + + return 0; +} + +static int s5h1420_send_master_cmd (struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME + return 0; +} + +static int s5h1420_recv_slave_reply (struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME + return 0; +} + +static int s5h1420_send_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd) +{ + struct s5h1420_state* state = fe->demodulator_priv; + u8 val; + int result = 0; + unsigned long timeout; + + /* setup for tone burst */ + val = s5h1420_readreg(state, 0x3b); + s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x70) | 0x01); + + /* set value for B position if requested */ + if (minicmd == SEC_MINI_B) { + s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x04); + } + msleep(15); + + /* start transmission */ + s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x08); + + /* wait for transmission to complete */ + timeout = jiffies + ((20*HZ) / 1000); + while(time_before(jiffies, timeout)) { + if (s5h1420_readreg(state, 0x3b) & 0x08) + break; + + msleep(1); + } + if (time_after(jiffies, timeout)) + result = -ETIMEDOUT; + + /* restore original settings */ + msleep(15); + s5h1420_writereg(state, 0x3b, val); + + return result; +} + +static fe_status_t s5h1420_get_status_bits(struct s5h1420_state* state) +{ + u8 val; + fe_status_t status = 0; + + val = s5h1420_readreg(state, 0x14); + if (val & 0x02) + status |= FE_HAS_SIGNAL; // FIXME: not sure if this is right + if (val & 0x01) + status |= FE_HAS_CARRIER; // FIXME: not sure if this is right + val = s5h1420_readreg(state, 0x36); + if (val & 0x01) + status |= FE_HAS_VITERBI; + if (val & 0x20) + status |= FE_HAS_SYNC; + if (status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|FE_HAS_SYNC)) + status |= FE_HAS_LOCK; + + return status; +} + +static int s5h1420_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct s5h1420_state* state = fe->demodulator_priv; + u8 val; + + if (status == NULL) + return -EINVAL; + + /* determine lock state */ + *status = s5h1420_get_status_bits(state); + + /* fix for FEC 5/6 inversion issue - if it doesn't quite lock, invert the inversion, + wait a bit and check again */ + if (*status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI)) { + val = s5h1420_readreg(state, 0x32); + if ((val & 0x07) == 0x03) { + if (val & 0x08) + s5h1420_writereg(state, 0x31, 0x13); + else + s5h1420_writereg(state, 0x31, 0x1b); + + /* wait a bit then update lock status */ + mdelay(200); + *status = s5h1420_get_status_bits(state); + } + } + + /* perform post lock setup */ + if ((*status & FE_HAS_LOCK) && (!state->postlocked)) { + + /* calculate the data rate */ + u32 tmp = s5h1420_getsymbolrate(state); + switch(s5h1420_readreg(state, 0x32) & 0x07) { + case 0: + tmp = (tmp * 2 * 1) / 2; + break; + + case 1: + tmp = (tmp * 2 * 2) / 3; + break; + + case 2: + tmp = (tmp * 2 * 3) / 4; + break; + + case 3: + tmp = (tmp * 2 * 5) / 6; + break; + + case 4: + tmp = (tmp * 2 * 6) / 7; + break; + + case 5: + tmp = (tmp * 2 * 7) / 8; + break; + } + tmp = state->fclk / tmp; + + /* set the MPEG_CLK_INTL for the calculated data rate */ + if (tmp < 4) + val = 0x00; + else if (tmp < 8) + val = 0x01; + else if (tmp < 12) + val = 0x02; + else if (tmp < 16) + val = 0x03; + else if (tmp < 24) + val = 0x04; + else if (tmp < 32) + val = 0x05; + else + val = 0x06; + s5h1420_writereg(state, 0x22, val); + + /* DC freeze */ + s5h1420_writereg(state, 0x1f, s5h1420_readreg(state, 0x1f) | 0x01); + + /* kicker disable + remove DC offset */ + s5h1420_writereg(state, 0x05, s5h1420_readreg(state, 0x05) & 0x6f); + + /* post-lock processing has been done! */ + state->postlocked = 1; + } + + return 0; +} + +static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME + return 0; +} + +static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME + return 0; +} + +static int s5h1420_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME + return 0; +} + +static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME + return 0; +} + +static void s5h1420_reset(struct s5h1420_state* state) +{ + s5h1420_writereg (state, 0x01, 0x08); + s5h1420_writereg (state, 0x01, 0x00); + udelay(10); +} + +static void s5h1420_setsymbolrate(struct s5h1420_state* state, struct dvb_frontend_parameters *p) +{ + u64 val; + + val = (p->u.qpsk.symbol_rate / 1000) * (1<<24); + if (p->u.qpsk.symbol_rate <= 21000000) { + val *= 2; + } + do_div(val, (state->fclk / 1000)); + + s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) & 0x7f); + s5h1420_writereg(state, 0x11, val >> 16); + s5h1420_writereg(state, 0x12, val >> 8); + s5h1420_writereg(state, 0x13, val & 0xff); + s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) | 0x80); +} + +static u32 s5h1420_getsymbolrate(struct s5h1420_state* state) +{ + u64 val; + int sampling = 2; + + if (s5h1420_readreg(state, 0x05) & 0x2) + sampling = 1; + + s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08); + val = s5h1420_readreg(state, 0x11) << 16; + val |= s5h1420_readreg(state, 0x12) << 8; + val |= s5h1420_readreg(state, 0x13); + s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7); + + val *= (state->fclk / 1000); + do_div(val, ((1<<24) * sampling)); + + return (u32) (val * 1000); +} + +static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset) +{ + int val; + + val = -(int) (((freqoffset / 1000) * (1<<24)) / (state->fclk / 1000000)); + + s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) & 0xbf); + s5h1420_writereg(state, 0x0e, val >> 16); + s5h1420_writereg(state, 0x0f, val >> 8); + s5h1420_writereg(state, 0x10, val & 0xff); + s5h1420_writereg(state, 0x09, s5h1420_readreg(state, 0x09) | 0x40); +} + +static int s5h1420_getfreqoffset(struct s5h1420_state* state) +{ + int val; + + s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08); + val = s5h1420_readreg(state, 0x0e) << 16; + val |= s5h1420_readreg(state, 0x0f) << 8; + val |= s5h1420_readreg(state, 0x10); + s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7); + + if (val & 0x800000) + val |= 0xff000000; + + val = - ((val * (state->fclk/1000)) / (1<<24)); + + return val; +} + +static void s5h1420_setfec(struct s5h1420_state* state, struct dvb_frontend_parameters *p) +{ + if ((p->u.qpsk.fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) { + s5h1420_writereg(state, 0x31, 0x00); + s5h1420_writereg(state, 0x30, 0x3f); + } else { + switch(p->u.qpsk.fec_inner) { + case FEC_1_2: + s5h1420_writereg(state, 0x31, 0x10); + s5h1420_writereg(state, 0x30, 0x01); + break; + + case FEC_2_3: + s5h1420_writereg(state, 0x31, 0x11); + s5h1420_writereg(state, 0x30, 0x02); + break; + + case FEC_3_4: + s5h1420_writereg(state, 0x31, 0x12); + s5h1420_writereg(state, 0x30, 0x04); + break; + + case FEC_5_6: + s5h1420_writereg(state, 0x31, 0x13); + s5h1420_writereg(state, 0x30, 0x08); + break; + + case FEC_6_7: + s5h1420_writereg(state, 0x31, 0x14); + s5h1420_writereg(state, 0x30, 0x10); + break; + + case FEC_7_8: + s5h1420_writereg(state, 0x31, 0x15); + s5h1420_writereg(state, 0x30, 0x20); + break; + + default: + return; + } + } +} + +static fe_code_rate_t s5h1420_getfec(struct s5h1420_state* state) +{ + switch(s5h1420_readreg(state, 0x32) & 0x07) { + case 0: + return FEC_1_2; + + case 1: + return FEC_2_3; + + case 2: + return FEC_3_4; + + case 3: + return FEC_5_6; + + case 4: + return FEC_6_7; + + case 5: + return FEC_7_8; + } + + return FEC_NONE; +} + +static void s5h1420_setinversion(struct s5h1420_state* state, struct dvb_frontend_parameters *p) +{ + if ((p->u.qpsk.fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) { + s5h1420_writereg(state, 0x31, 0x00); + s5h1420_writereg(state, 0x30, 0x3f); + } else { + u8 tmp = s5h1420_readreg(state, 0x31) & 0xf7; + tmp |= 0x10; + + if (p->inversion == INVERSION_ON) + tmp |= 0x80; + + s5h1420_writereg(state, 0x31, tmp); + } +} + +static fe_spectral_inversion_t s5h1420_getinversion(struct s5h1420_state* state) +{ + if (s5h1420_readreg(state, 0x32) & 0x08) + return INVERSION_ON; + + return INVERSION_OFF; +} + +static int s5h1420_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + // FIXME: fast tune + + /* first of all, software reset */ + s5h1420_reset(state); + + /* set tuner PLL */ + if (state->config->pll_set) { + s5h1420_writereg (state, 0x02, s5h1420_readreg(state,0x02) | 1); + state->config->pll_set(fe, p, &state->tunedfreq); + s5h1420_writereg (state, 0x02, s5h1420_readreg(state,0x02) & 0xfe); + } + + /* set s5h1420 fclk PLL according to desired symbol rate */ + if (p->u.qpsk.symbol_rate > 28000000) { + state->fclk = 88000000; + s5h1420_writereg(state, 0x03, 0x50); + s5h1420_writereg(state, 0x04, 0x40); + s5h1420_writereg(state, 0x05, 0xae); + } else if (p->u.qpsk.symbol_rate > 21000000) { + state->fclk = 59000000; + s5h1420_writereg(state, 0x03, 0x33); + s5h1420_writereg(state, 0x04, 0x40); + s5h1420_writereg(state, 0x05, 0xae); + } else { + state->fclk = 88000000; + s5h1420_writereg(state, 0x03, 0x50); + s5h1420_writereg(state, 0x04, 0x40); + s5h1420_writereg(state, 0x05, 0xac); + } + + /* set misc registers */ + s5h1420_writereg(state, 0x02, 0x00); + s5h1420_writereg(state, 0x07, 0xb0); + s5h1420_writereg(state, 0x0a, 0x67); + s5h1420_writereg(state, 0x0b, 0x78); + s5h1420_writereg(state, 0x0c, 0x48); + s5h1420_writereg(state, 0x0d, 0x6b); + s5h1420_writereg(state, 0x2e, 0x8e); + s5h1420_writereg(state, 0x35, 0x33); + s5h1420_writereg(state, 0x38, 0x01); + s5h1420_writereg(state, 0x39, 0x7d); + s5h1420_writereg(state, 0x3a, (state->fclk + (22000*32) - 1) / (22000*32)); + s5h1420_writereg(state, 0x3c, 0x00); + s5h1420_writereg(state, 0x45, 0x61); + s5h1420_writereg(state, 0x46, 0x1d); + + /* start QPSK */ + s5h1420_writereg(state, 0x05, s5h1420_readreg(state, 0x05) | 1); + + /* set the frequency offset to 0 initially */ + s5h1420_setfreqoffset(state, 0); + + /* set the symbolrate */ + s5h1420_setsymbolrate(state, p); + + /* set the inversion */ + s5h1420_setinversion(state, p); + + /* set the FEC */ + s5h1420_setfec(state, p); + + state->postlocked = 0; + return 0; +} + +static int s5h1420_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state); + p->inversion = s5h1420_getinversion(state); + p->u.qpsk.symbol_rate = s5h1420_getsymbolrate(state); + p->u.qpsk.fec_inner = s5h1420_getfec(state); + + return 0; +} + +static int s5h1420_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings) +{ + // FIXME + + return 0; +} + +static int s5h1420_init (struct dvb_frontend* fe) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + /* disable power down and do reset */ + s5h1420_writereg(state, 0x02, 0x10); + msleep(10); + s5h1420_reset(state); + + /* init PLL */ + if (state->config->pll_init) { + s5h1420_writereg (state, 0x02, s5h1420_readreg(state,0x02) | 1); + state->config->pll_init(fe); + s5h1420_writereg (state, 0x02, s5h1420_readreg(state,0x02) & 0xfe); + } + + return 0; +} + +static int s5h1420_sleep(struct dvb_frontend* fe) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + return s5h1420_writereg(state, 0x02, 0x12); +} + +static void s5h1420_release(struct dvb_frontend* fe) +{ + struct s5h1420_state* state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops s5h1420_ops; + +struct dvb_frontend* s5h1420_attach(const struct s5h1420_config* config, struct i2c_adapter* i2c) +{ + struct s5h1420_state* state = NULL; + u8 identity; + + /* allocate memory for the internal state */ + state = kmalloc(sizeof(struct s5h1420_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + memcpy(&state->ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops)); + state->postlocked = 0; + state->fclk = 88000000; + state->tunedfreq = 0; + + /* check if the demod is there + identify it */ + identity = s5h1420_readreg(state, 0x00); + if (identity != 0x03) + 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 s5h1420_ops = { + + .info = { + .name = "Samsung S5H1420 DVB-S", + .type = FE_QPSK, + .frequency_min = 950000, + .frequency_max = 2150000, + .frequency_stepsize = 125, /* kHz for QPSK frontends */ + .frequency_tolerance = 29500, + .symbol_rate_min = 1000000, + .symbol_rate_max = 45000000, + /* .symbol_rate_tolerance = ???,*/ + .caps = FE_CAN_INVERSION_AUTO | + FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | + FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | + FE_CAN_QPSK + }, + + .release = s5h1420_release, + + .init = s5h1420_init, + .sleep = s5h1420_sleep, + + .set_frontend = s5h1420_set_frontend, + .get_frontend = s5h1420_get_frontend, + .get_tune_settings = s5h1420_get_tune_settings, + + .read_status = s5h1420_read_status, + .read_ber = s5h1420_read_ber, + .read_signal_strength = s5h1420_read_signal_strength, + .read_snr = s5h1420_read_snr, + .read_ucblocks = s5h1420_read_ucblocks, + + .diseqc_send_master_cmd = s5h1420_send_master_cmd, + .diseqc_recv_slave_reply = s5h1420_recv_slave_reply, + .diseqc_send_burst = s5h1420_send_burst, + .set_tone = s5h1420_set_tone, + .set_voltage = s5h1420_set_voltage, +}; + +module_param(debug, int, 0644); + +MODULE_DESCRIPTION("Samsung S5H1420 DVB-S Demodulator driver"); +MODULE_AUTHOR("Andrew de Quincey"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(s5h1420_attach); |