diff options
Diffstat (limited to 'drivers/media/dvb-frontends/s5h1420.c')
| -rw-r--r-- | drivers/media/dvb-frontends/s5h1420.c | 964 |
1 files changed, 964 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/s5h1420.c b/drivers/media/dvb-frontends/s5h1420.c new file mode 100644 index 000000000..d700de1ea --- /dev/null +++ b/drivers/media/dvb-frontends/s5h1420.c @@ -0,0 +1,964 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for + * Samsung S5H1420 and + * PnpNetwork PN1010 QPSK Demodulator + * + * Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net> + * Copyright (C) 2005-8 Patrick Boettcher <pb@linuxtv.org> + */ + +#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 <linux/jiffies.h> +#include <asm/div64.h> + +#include <linux/i2c.h> + + +#include <media/dvb_frontend.h> +#include "s5h1420.h" +#include "s5h1420_priv.h" + +#define TONE_FREQ 22000 + +struct s5h1420_state { + struct i2c_adapter* i2c; + const struct s5h1420_config* config; + + struct dvb_frontend frontend; + struct i2c_adapter tuner_i2c_adapter; + + u8 CON_1_val; + + u8 postlocked:1; + u32 fclk; + u32 tunedfreq; + enum fe_code_rate fec_inner; + u32 symbol_rate; + + /* FIXME: ugly workaround for flexcop's incapable i2c-controller + * it does not support repeated-start, workaround: write addr-1 + * and then read + */ + u8 shadow[256]; +}; + +static u32 s5h1420_getsymbolrate(struct s5h1420_state* state); +static int s5h1420_get_tune_settings(struct dvb_frontend* fe, + struct dvb_frontend_tune_settings* fesettings); + + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "enable debugging"); + +#define dprintk(x...) do { \ + if (debug) \ + printk(KERN_DEBUG "S5H1420: " x); \ +} while (0) + +static u8 s5h1420_readreg(struct s5h1420_state *state, u8 reg) +{ + int ret; + u8 b[2]; + struct i2c_msg msg[] = { + { .addr = state->config->demod_address, .flags = 0, .buf = b, .len = 2 }, + { .addr = state->config->demod_address, .flags = 0, .buf = ®, .len = 1 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = 1 }, + }; + + b[0] = (reg - 1) & 0xff; + b[1] = state->shadow[(reg - 1) & 0xff]; + + if (state->config->repeated_start_workaround) { + ret = i2c_transfer(state->i2c, msg, 3); + if (ret != 3) + return ret; + } else { + ret = i2c_transfer(state->i2c, &msg[1], 1); + if (ret != 1) + return ret; + ret = i2c_transfer(state->i2c, &msg[2], 1); + if (ret != 1) + return ret; + } + + /* dprintk("rd(%02x): %02x %02x\n", state->config->demod_address, reg, b[0]); */ + + return b[0]; +} + +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 = 2 }; + int err; + + /* dprintk("wr(%02x): %02x %02x\n", state->config->demod_address, reg, data); */ + err = i2c_transfer(state->i2c, &msg, 1); + if (err != 1) { + dprintk("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data); + return -EREMOTEIO; + } + state->shadow[reg] = data; + + return 0; +} + +static int s5h1420_set_voltage(struct dvb_frontend *fe, + enum fe_sec_voltage voltage) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + dprintk("enter %s\n", __func__); + + 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; + } + + dprintk("leave %s\n", __func__); + return 0; +} + +static int s5h1420_set_tone(struct dvb_frontend *fe, + enum fe_sec_tone_mode tone) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + dprintk("enter %s\n", __func__); + 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; + } + dprintk("leave %s\n", __func__); + + 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; + u8 val; + int i; + unsigned long timeout; + int result = 0; + + dprintk("enter %s\n", __func__); + if (cmd->msg_len > sizeof(cmd->msg)) + return -EINVAL; + + /* setup for DISEQC */ + val = s5h1420_readreg(state, 0x3b); + s5h1420_writereg(state, 0x3b, 0x02); + msleep(15); + + /* write the DISEQC command bytes */ + for(i=0; i< cmd->msg_len; i++) { + s5h1420_writereg(state, 0x3d + i, cmd->msg[i]); + } + + /* kick off transmission */ + s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | + ((cmd->msg_len-1) << 4) | 0x08); + + /* wait for transmission to complete */ + timeout = jiffies + ((100*HZ) / 1000); + while(time_before(jiffies, timeout)) { + if (!(s5h1420_readreg(state, 0x3b) & 0x08)) + break; + + msleep(5); + } + if (time_after(jiffies, timeout)) + result = -ETIMEDOUT; + + /* restore original settings */ + s5h1420_writereg(state, 0x3b, val); + msleep(15); + dprintk("leave %s\n", __func__); + return result; +} + +static int s5h1420_recv_slave_reply (struct dvb_frontend* fe, + struct dvb_diseqc_slave_reply* reply) +{ + struct s5h1420_state* state = fe->demodulator_priv; + u8 val; + int i; + int length; + unsigned long timeout; + int result = 0; + + /* setup for DISEQC receive */ + val = s5h1420_readreg(state, 0x3b); + s5h1420_writereg(state, 0x3b, 0x82); /* FIXME: guess - do we need to set DIS_RDY(0x08) in receive mode? */ + msleep(15); + + /* wait for reception to complete */ + timeout = jiffies + ((reply->timeout*HZ) / 1000); + while(time_before(jiffies, timeout)) { + if (!(s5h1420_readreg(state, 0x3b) & 0x80)) /* FIXME: do we test DIS_RDY(0x08) or RCV_EN(0x80)? */ + break; + + msleep(5); + } + if (time_after(jiffies, timeout)) { + result = -ETIMEDOUT; + goto exit; + } + + /* check error flag - FIXME: not sure what this does - docs do not describe + * beyond "error flag for diseqc receive data :( */ + if (s5h1420_readreg(state, 0x49)) { + result = -EIO; + goto exit; + } + + /* check length */ + length = (s5h1420_readreg(state, 0x3b) & 0x70) >> 4; + if (length > sizeof(reply->msg)) { + result = -EOVERFLOW; + goto exit; + } + reply->msg_len = length; + + /* extract data */ + for(i=0; i< length; i++) { + reply->msg[i] = s5h1420_readreg(state, 0x3d + i); + } + +exit: + /* restore original settings */ + s5h1420_writereg(state, 0x3b, val); + msleep(15); + return result; +} + +static int s5h1420_send_burst(struct dvb_frontend *fe, + enum fe_sec_mini_cmd 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 + ((100*HZ) / 1000); + while(time_before(jiffies, timeout)) { + if (!(s5h1420_readreg(state, 0x3b) & 0x08)) + break; + + msleep(5); + } + if (time_after(jiffies, timeout)) + result = -ETIMEDOUT; + + /* restore original settings */ + s5h1420_writereg(state, 0x3b, val); + msleep(15); + return result; +} + +static enum fe_status s5h1420_get_status_bits(struct s5h1420_state *state) +{ + u8 val; + enum fe_status status = 0; + + val = s5h1420_readreg(state, 0x14); + if (val & 0x02) + status |= FE_HAS_SIGNAL; + if (val & 0x01) + status |= FE_HAS_CARRIER; + 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, + enum fe_status *status) +{ + struct s5h1420_state* state = fe->demodulator_priv; + u8 val; + + dprintk("enter %s\n", __func__); + + 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, Vit10); + if ((val & 0x07) == 0x03) { + if (val & 0x08) + s5h1420_writereg(state, Vit09, 0x13); + else + s5h1420_writereg(state, Vit09, 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, Vit10) & 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; + } + + if (tmp == 0) { + printk(KERN_ERR "s5h1420: avoided division by 0\n"); + tmp = 1; + } + tmp = state->fclk / tmp; + + + /* set the MPEG_CLK_INTL for the calculated data rate */ + if (tmp < 2) + val = 0x00; + else if (tmp < 5) + val = 0x01; + else if (tmp < 9) + val = 0x02; + else if (tmp < 13) + val = 0x03; + else if (tmp < 17) + val = 0x04; + else if (tmp < 25) + val = 0x05; + else if (tmp < 33) + val = 0x06; + else + val = 0x07; + dprintk("for MPEG_CLK_INTL %d %x\n", tmp, val); + + s5h1420_writereg(state, FEC01, 0x18); + s5h1420_writereg(state, FEC01, 0x10); + s5h1420_writereg(state, FEC01, val); + + /* Enable "MPEG_Out" */ + val = s5h1420_readreg(state, Mpeg02); + s5h1420_writereg(state, Mpeg02, val | (1 << 6)); + + /* kicker disable */ + val = s5h1420_readreg(state, QPSK01) & 0x7f; + s5h1420_writereg(state, QPSK01, val); + + /* DC freeze TODO it was never activated by default or it can stay activated */ + + if (s5h1420_getsymbolrate(state) >= 20000000) { + s5h1420_writereg(state, Loop04, 0x8a); + s5h1420_writereg(state, Loop05, 0x6a); + } else { + s5h1420_writereg(state, Loop04, 0x58); + s5h1420_writereg(state, Loop05, 0x27); + } + + /* post-lock processing has been done! */ + state->postlocked = 1; + } + + dprintk("leave %s\n", __func__); + + return 0; +} + +static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + s5h1420_writereg(state, 0x46, 0x1d); + mdelay(25); + + *ber = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47); + + return 0; +} + +static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + u8 val = s5h1420_readreg(state, 0x15); + + *strength = (u16) ((val << 8) | val); + + return 0; +} + +static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + s5h1420_writereg(state, 0x46, 0x1f); + mdelay(25); + + *ucblocks = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47); + + return 0; +} + +static void s5h1420_reset(struct s5h1420_state* state) +{ + dprintk("%s\n", __func__); + s5h1420_writereg (state, 0x01, 0x08); + s5h1420_writereg (state, 0x01, 0x00); + udelay(10); +} + +static void s5h1420_setsymbolrate(struct s5h1420_state* state, + struct dtv_frontend_properties *p) +{ + u8 v; + u64 val; + + dprintk("enter %s\n", __func__); + + val = ((u64) p->symbol_rate / 1000ULL) * (1ULL<<24); + if (p->symbol_rate < 29000000) + val *= 2; + do_div(val, (state->fclk / 1000)); + + dprintk("symbol rate register: %06llx\n", (unsigned long long)val); + + v = s5h1420_readreg(state, Loop01); + s5h1420_writereg(state, Loop01, v & 0x7f); + s5h1420_writereg(state, Tnco01, val >> 16); + s5h1420_writereg(state, Tnco02, val >> 8); + s5h1420_writereg(state, Tnco03, val & 0xff); + s5h1420_writereg(state, Loop01, v | 0x80); + dprintk("leave %s\n", __func__); +} + +static u32 s5h1420_getsymbolrate(struct s5h1420_state* state) +{ + return state->symbol_rate; +} + +static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset) +{ + int val; + u8 v; + + dprintk("enter %s\n", __func__); + + /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so + * divide fclk by 1000000 to get the correct value. */ + val = -(int) ((freqoffset * (1<<24)) / (state->fclk / 1000000)); + + dprintk("phase rotator/freqoffset: %d %06x\n", freqoffset, val); + + v = s5h1420_readreg(state, Loop01); + s5h1420_writereg(state, Loop01, v & 0xbf); + s5h1420_writereg(state, Pnco01, val >> 16); + s5h1420_writereg(state, Pnco02, val >> 8); + s5h1420_writereg(state, Pnco03, val & 0xff); + s5h1420_writereg(state, Loop01, v | 0x40); + dprintk("leave %s\n", __func__); +} + +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; + + /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so + * divide fclk by 1000000 to get the correct value. */ + val = (((-val) * (state->fclk/1000000)) / (1<<24)); + + return val; +} + +static void s5h1420_setfec_inversion(struct s5h1420_state* state, + struct dtv_frontend_properties *p) +{ + u8 inversion = 0; + u8 vit08, vit09; + + dprintk("enter %s\n", __func__); + + if (p->inversion == INVERSION_OFF) + inversion = state->config->invert ? 0x08 : 0; + else if (p->inversion == INVERSION_ON) + inversion = state->config->invert ? 0 : 0x08; + + if ((p->fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) { + vit08 = 0x3f; + vit09 = 0; + } else { + switch (p->fec_inner) { + case FEC_1_2: + vit08 = 0x01; + vit09 = 0x10; + break; + + case FEC_2_3: + vit08 = 0x02; + vit09 = 0x11; + break; + + case FEC_3_4: + vit08 = 0x04; + vit09 = 0x12; + break; + + case FEC_5_6: + vit08 = 0x08; + vit09 = 0x13; + break; + + case FEC_6_7: + vit08 = 0x10; + vit09 = 0x14; + break; + + case FEC_7_8: + vit08 = 0x20; + vit09 = 0x15; + break; + + default: + return; + } + } + vit09 |= inversion; + dprintk("fec: %02x %02x\n", vit08, vit09); + s5h1420_writereg(state, Vit08, vit08); + s5h1420_writereg(state, Vit09, vit09); + dprintk("leave %s\n", __func__); +} + +static enum fe_code_rate 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 enum fe_spectral_inversion +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 dtv_frontend_properties *p = &fe->dtv_property_cache; + struct s5h1420_state* state = fe->demodulator_priv; + int frequency_delta; + struct dvb_frontend_tune_settings fesettings; + + dprintk("enter %s\n", __func__); + + /* check if we should do a fast-tune */ + s5h1420_get_tune_settings(fe, &fesettings); + frequency_delta = p->frequency - state->tunedfreq; + if ((frequency_delta > -fesettings.max_drift) && + (frequency_delta < fesettings.max_drift) && + (frequency_delta != 0) && + (state->fec_inner == p->fec_inner) && + (state->symbol_rate == p->symbol_rate)) { + + 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); + } + if (fe->ops.tuner_ops.get_frequency) { + u32 tmp; + fe->ops.tuner_ops.get_frequency(fe, &tmp); + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); + s5h1420_setfreqoffset(state, p->frequency - tmp); + } else { + s5h1420_setfreqoffset(state, 0); + } + dprintk("simple tune\n"); + return 0; + } + dprintk("tuning demod\n"); + + /* first of all, software reset */ + s5h1420_reset(state); + + /* set s5h1420 fclk PLL according to desired symbol rate */ + if (p->symbol_rate > 33000000) + state->fclk = 80000000; + else if (p->symbol_rate > 28500000) + state->fclk = 59000000; + else if (p->symbol_rate > 25000000) + state->fclk = 86000000; + else if (p->symbol_rate > 1900000) + state->fclk = 88000000; + else + state->fclk = 44000000; + + dprintk("pll01: %d, ToneFreq: %d\n", state->fclk/1000000 - 8, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32)); + s5h1420_writereg(state, PLL01, state->fclk/1000000 - 8); + s5h1420_writereg(state, PLL02, 0x40); + s5h1420_writereg(state, DiS01, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32)); + + /* TODO DC offset removal, config parameter ? */ + if (p->symbol_rate > 29000000) + s5h1420_writereg(state, QPSK01, 0xae | 0x10); + else + s5h1420_writereg(state, QPSK01, 0xac | 0x10); + + /* set misc registers */ + s5h1420_writereg(state, CON_1, 0x00); + s5h1420_writereg(state, QPSK02, 0x00); + s5h1420_writereg(state, Pre01, 0xb0); + + s5h1420_writereg(state, Loop01, 0xF0); + s5h1420_writereg(state, Loop02, 0x2a); /* e7 for s5h1420 */ + s5h1420_writereg(state, Loop03, 0x79); /* 78 for s5h1420 */ + if (p->symbol_rate > 20000000) + s5h1420_writereg(state, Loop04, 0x79); + else + s5h1420_writereg(state, Loop04, 0x58); + s5h1420_writereg(state, Loop05, 0x6b); + + if (p->symbol_rate >= 8000000) + s5h1420_writereg(state, Post01, (0 << 6) | 0x10); + else if (p->symbol_rate >= 4000000) + s5h1420_writereg(state, Post01, (1 << 6) | 0x10); + else + s5h1420_writereg(state, Post01, (3 << 6) | 0x10); + + s5h1420_writereg(state, Monitor12, 0x00); /* unfreeze DC compensation */ + + s5h1420_writereg(state, Sync01, 0x33); + s5h1420_writereg(state, Mpeg01, state->config->cdclk_polarity); + s5h1420_writereg(state, Mpeg02, 0x3d); /* Parallel output more, disabled -> enabled later */ + s5h1420_writereg(state, Err01, 0x03); /* 0x1d for s5h1420 */ + + s5h1420_writereg(state, Vit06, 0x6e); /* 0x8e for s5h1420 */ + s5h1420_writereg(state, DiS03, 0x00); + s5h1420_writereg(state, Rf01, 0x61); /* Tuner i2c address - for the gate controller */ + + /* set tuner PLL */ + 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); + s5h1420_setfreqoffset(state, 0); + } + + /* set the reset of the parameters */ + s5h1420_setsymbolrate(state, p); + s5h1420_setfec_inversion(state, p); + + /* start QPSK */ + s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1); + + state->fec_inner = p->fec_inner; + state->symbol_rate = p->symbol_rate; + state->postlocked = 0; + state->tunedfreq = p->frequency; + + dprintk("leave %s\n", __func__); + return 0; +} + +static int s5h1420_get_frontend(struct dvb_frontend* fe, + struct dtv_frontend_properties *p) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state); + p->inversion = s5h1420_getinversion(state); + p->symbol_rate = s5h1420_getsymbolrate(state); + p->fec_inner = s5h1420_getfec(state); + + return 0; +} + +static int s5h1420_get_tune_settings(struct dvb_frontend* fe, + struct dvb_frontend_tune_settings* fesettings) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + if (p->symbol_rate > 20000000) { + fesettings->min_delay_ms = 50; + fesettings->step_size = 2000; + fesettings->max_drift = 8000; + } else if (p->symbol_rate > 12000000) { + fesettings->min_delay_ms = 100; + fesettings->step_size = 1500; + fesettings->max_drift = 9000; + } else if (p->symbol_rate > 8000000) { + fesettings->min_delay_ms = 100; + fesettings->step_size = 1000; + fesettings->max_drift = 8000; + } else if (p->symbol_rate > 4000000) { + fesettings->min_delay_ms = 100; + fesettings->step_size = 500; + fesettings->max_drift = 7000; + } else if (p->symbol_rate > 2000000) { + fesettings->min_delay_ms = 200; + fesettings->step_size = (p->symbol_rate / 8000); + fesettings->max_drift = 14 * fesettings->step_size; + } else { + fesettings->min_delay_ms = 200; + fesettings->step_size = (p->symbol_rate / 8000); + fesettings->max_drift = 18 * fesettings->step_size; + } + + return 0; +} + +static int s5h1420_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + if (enable) + return s5h1420_writereg(state, 0x02, state->CON_1_val | 1); + else + return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe); +} + +static int s5h1420_init (struct dvb_frontend* fe) +{ + struct s5h1420_state* state = fe->demodulator_priv; + + /* disable power down and do reset */ + state->CON_1_val = state->config->serial_mpeg << 4; + s5h1420_writereg(state, 0x02, state->CON_1_val); + msleep(10); + s5h1420_reset(state); + + return 0; +} + +static int s5h1420_sleep(struct dvb_frontend* fe) +{ + struct s5h1420_state* state = fe->demodulator_priv; + state->CON_1_val = 0x12; + return s5h1420_writereg(state, 0x02, state->CON_1_val); +} + +static void s5h1420_release(struct dvb_frontend* fe) +{ + struct s5h1420_state* state = fe->demodulator_priv; + i2c_del_adapter(&state->tuner_i2c_adapter); + kfree(state); +} + +static u32 s5h1420_tuner_i2c_func(struct i2c_adapter *adapter) +{ + return I2C_FUNC_I2C; +} + +static int s5h1420_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num) +{ + struct s5h1420_state *state = i2c_get_adapdata(i2c_adap); + struct i2c_msg m[3]; + u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */ + + if (1 + num > ARRAY_SIZE(m)) { + printk(KERN_WARNING + "%s: i2c xfer: num=%d is too big!\n", + KBUILD_MODNAME, num); + return -EOPNOTSUPP; + } + + memset(m, 0, sizeof(struct i2c_msg) * (1 + num)); + + m[0].addr = state->config->demod_address; + m[0].buf = tx_open; + m[0].len = 2; + + memcpy(&m[1], msg, sizeof(struct i2c_msg) * num); + + return i2c_transfer(state->i2c, m, 1 + num) == 1 + num ? num : -EIO; +} + +static const struct i2c_algorithm s5h1420_tuner_i2c_algo = { + .master_xfer = s5h1420_tuner_i2c_tuner_xfer, + .functionality = s5h1420_tuner_i2c_func, +}; + +struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe) +{ + struct s5h1420_state *state = fe->demodulator_priv; + return &state->tuner_i2c_adapter; +} +EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter); + +static const struct dvb_frontend_ops s5h1420_ops; + +struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config, + struct i2c_adapter *i2c) +{ + /* allocate memory for the internal state */ + struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL); + u8 i; + + if (state == NULL) + goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + state->postlocked = 0; + state->fclk = 88000000; + state->tunedfreq = 0; + state->fec_inner = FEC_NONE; + state->symbol_rate = 0; + + /* check if the demod is there + identify it */ + i = s5h1420_readreg(state, ID01); + if (i != 0x03) + goto error; + + memset(state->shadow, 0xff, sizeof(state->shadow)); + + for (i = 0; i < 0x50; i++) + state->shadow[i] = s5h1420_readreg(state, i); + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + /* create tuner i2c adapter */ + strscpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus", + sizeof(state->tuner_i2c_adapter.name)); + state->tuner_i2c_adapter.algo = &s5h1420_tuner_i2c_algo; + state->tuner_i2c_adapter.algo_data = NULL; + i2c_set_adapdata(&state->tuner_i2c_adapter, state); + if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) { + printk(KERN_ERR "S5H1420/PN1010: tuner i2c bus could not be initialized\n"); + goto error; + } + + return &state->frontend; + +error: + kfree(state); + return NULL; +} +EXPORT_SYMBOL_GPL(s5h1420_attach); + +static const struct dvb_frontend_ops s5h1420_ops = { + .delsys = { SYS_DVBS }, + .info = { + .name = "Samsung S5H1420/PnpNetwork PN1010 DVB-S", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + .frequency_stepsize_hz = 125 * kHz, + .frequency_tolerance_hz = 29500 * kHz, + .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, + .i2c_gate_ctrl = s5h1420_i2c_gate_ctrl, + + .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_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_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver"); +MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher"); +MODULE_LICENSE("GPL"); |