diff options
Diffstat (limited to 'drivers/media/dvb/frontends/si21xx.c')
| -rw-r--r-- | drivers/media/dvb/frontends/si21xx.c | 951 |
1 files changed, 0 insertions, 951 deletions
diff --git a/drivers/media/dvb/frontends/si21xx.c b/drivers/media/dvb/frontends/si21xx.c deleted file mode 100644 index a68a648..0000000 --- a/drivers/media/dvb/frontends/si21xx.c +++ /dev/null @@ -1,951 +0,0 @@ -/* DVB compliant Linux driver for the DVB-S si2109/2110 demodulator -* -* Copyright (C) 2008 Igor M. Liplianin (liplianin@me.by) -* -* 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. -* -*/ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/jiffies.h> -#include <asm/div64.h> - -#include "dvb_frontend.h" -#include "si21xx.h" - -#define REVISION_REG 0x00 -#define SYSTEM_MODE_REG 0x01 -#define TS_CTRL_REG_1 0x02 -#define TS_CTRL_REG_2 0x03 -#define PIN_CTRL_REG_1 0x04 -#define PIN_CTRL_REG_2 0x05 -#define LOCK_STATUS_REG_1 0x0f -#define LOCK_STATUS_REG_2 0x10 -#define ACQ_STATUS_REG 0x11 -#define ACQ_CTRL_REG_1 0x13 -#define ACQ_CTRL_REG_2 0x14 -#define PLL_DIVISOR_REG 0x15 -#define COARSE_TUNE_REG 0x16 -#define FINE_TUNE_REG_L 0x17 -#define FINE_TUNE_REG_H 0x18 - -#define ANALOG_AGC_POWER_LEVEL_REG 0x28 -#define CFO_ESTIMATOR_CTRL_REG_1 0x29 -#define CFO_ESTIMATOR_CTRL_REG_2 0x2a -#define CFO_ESTIMATOR_CTRL_REG_3 0x2b - -#define SYM_RATE_ESTIMATE_REG_L 0x31 -#define SYM_RATE_ESTIMATE_REG_M 0x32 -#define SYM_RATE_ESTIMATE_REG_H 0x33 - -#define CFO_ESTIMATOR_OFFSET_REG_L 0x36 -#define CFO_ESTIMATOR_OFFSET_REG_H 0x37 -#define CFO_ERROR_REG_L 0x38 -#define CFO_ERROR_REG_H 0x39 -#define SYM_RATE_ESTIMATOR_CTRL_REG 0x3a - -#define SYM_RATE_REG_L 0x3f -#define SYM_RATE_REG_M 0x40 -#define SYM_RATE_REG_H 0x41 -#define SYM_RATE_ESTIMATOR_MAXIMUM_REG 0x42 -#define SYM_RATE_ESTIMATOR_MINIMUM_REG 0x43 - -#define C_N_ESTIMATOR_CTRL_REG 0x7c -#define C_N_ESTIMATOR_THRSHLD_REG 0x7d -#define C_N_ESTIMATOR_LEVEL_REG_L 0x7e -#define C_N_ESTIMATOR_LEVEL_REG_H 0x7f - -#define BLIND_SCAN_CTRL_REG 0x80 - -#define LSA_CTRL_REG_1 0x8D -#define SPCTRM_TILT_CORR_THRSHLD_REG 0x8f -#define ONE_DB_BNDWDTH_THRSHLD_REG 0x90 -#define TWO_DB_BNDWDTH_THRSHLD_REG 0x91 -#define THREE_DB_BNDWDTH_THRSHLD_REG 0x92 -#define INBAND_POWER_THRSHLD_REG 0x93 -#define REF_NOISE_LVL_MRGN_THRSHLD_REG 0x94 - -#define VIT_SRCH_CTRL_REG_1 0xa0 -#define VIT_SRCH_CTRL_REG_2 0xa1 -#define VIT_SRCH_CTRL_REG_3 0xa2 -#define VIT_SRCH_STATUS_REG 0xa3 -#define VITERBI_BER_COUNT_REG_L 0xab -#define REED_SOLOMON_CTRL_REG 0xb0 -#define REED_SOLOMON_ERROR_COUNT_REG_L 0xb1 -#define PRBS_CTRL_REG 0xb5 - -#define LNB_CTRL_REG_1 0xc0 -#define LNB_CTRL_REG_2 0xc1 -#define LNB_CTRL_REG_3 0xc2 -#define LNB_CTRL_REG_4 0xc3 -#define LNB_CTRL_STATUS_REG 0xc4 -#define LNB_FIFO_REGS_0 0xc5 -#define LNB_FIFO_REGS_1 0xc6 -#define LNB_FIFO_REGS_2 0xc7 -#define LNB_FIFO_REGS_3 0xc8 -#define LNB_FIFO_REGS_4 0xc9 -#define LNB_FIFO_REGS_5 0xca -#define LNB_SUPPLY_CTRL_REG_1 0xcb -#define LNB_SUPPLY_CTRL_REG_2 0xcc -#define LNB_SUPPLY_CTRL_REG_3 0xcd -#define LNB_SUPPLY_CTRL_REG_4 0xce -#define LNB_SUPPLY_STATUS_REG 0xcf - -#define FAIL -1 -#define PASS 0 - -#define ALLOWABLE_FS_COUNT 10 -#define STATUS_BER 0 -#define STATUS_UCBLOCKS 1 - -static int debug; -#define dprintk(args...) \ - do { \ - if (debug) \ - printk(KERN_DEBUG "si21xx: " args); \ - } while (0) - -enum { - ACTIVE_HIGH, - ACTIVE_LOW -}; -enum { - BYTE_WIDE, - BIT_WIDE -}; -enum { - CLK_GAPPED_MODE, - CLK_CONTINUOUS_MODE -}; -enum { - RISING_EDGE, - FALLING_EDGE -}; -enum { - MSB_FIRST, - LSB_FIRST -}; -enum { - SERIAL, - PARALLEL -}; - -struct si21xx_state { - struct i2c_adapter *i2c; - const struct si21xx_config *config; - struct dvb_frontend frontend; - u8 initialised:1; - int errmode; - int fs; /*Sampling rate of the ADC in MHz*/ -}; - -/* register default initialization */ -static u8 serit_sp1511lhb_inittab[] = { - 0x01, 0x28, /* set i2c_inc_disable */ - 0x20, 0x03, - 0x27, 0x20, - 0xe0, 0x45, - 0xe1, 0x08, - 0xfe, 0x01, - 0x01, 0x28, - 0x89, 0x09, - 0x04, 0x80, - 0x05, 0x01, - 0x06, 0x00, - 0x20, 0x03, - 0x24, 0x88, - 0x29, 0x09, - 0x2a, 0x0f, - 0x2c, 0x10, - 0x2d, 0x19, - 0x2e, 0x08, - 0x2f, 0x10, - 0x30, 0x19, - 0x34, 0x20, - 0x35, 0x03, - 0x45, 0x02, - 0x46, 0x45, - 0x47, 0xd0, - 0x48, 0x00, - 0x49, 0x40, - 0x4a, 0x03, - 0x4c, 0xfd, - 0x4f, 0x2e, - 0x50, 0x2e, - 0x51, 0x10, - 0x52, 0x10, - 0x56, 0x92, - 0x59, 0x00, - 0x5a, 0x2d, - 0x5b, 0x33, - 0x5c, 0x1f, - 0x5f, 0x76, - 0x62, 0xc0, - 0x63, 0xc0, - 0x64, 0xf3, - 0x65, 0xf3, - 0x79, 0x40, - 0x6a, 0x40, - 0x6b, 0x0a, - 0x6c, 0x80, - 0x6d, 0x27, - 0x71, 0x06, - 0x75, 0x60, - 0x78, 0x00, - 0x79, 0xb5, - 0x7c, 0x05, - 0x7d, 0x1a, - 0x87, 0x55, - 0x88, 0x72, - 0x8f, 0x08, - 0x90, 0xe0, - 0x94, 0x40, - 0xa0, 0x3f, - 0xa1, 0xc0, - 0xa4, 0xcc, - 0xa5, 0x66, - 0xa6, 0x66, - 0xa7, 0x7b, - 0xa8, 0x7b, - 0xa9, 0x7b, - 0xaa, 0x9a, - 0xed, 0x04, - 0xad, 0x00, - 0xae, 0x03, - 0xcc, 0xab, - 0x01, 0x08, - 0xff, 0xff -}; - -/* low level read/writes */ -static int si21_writeregs(struct si21xx_state *state, u8 reg1, - u8 *data, int len) -{ - int ret; - u8 buf[60];/* = { reg1, data };*/ - struct i2c_msg msg = { - .addr = state->config->demod_address, - .flags = 0, - .buf = buf, - .len = len + 1 - }; - - msg.buf[0] = reg1; - memcpy(msg.buf + 1, data, len); - - ret = i2c_transfer(state->i2c, &msg, 1); - - if (ret != 1) - dprintk("%s: writereg error (reg1 == 0x%02x, data == 0x%02x, " - "ret == %i)\n", __func__, reg1, data[0], ret); - - return (ret != 1) ? -EREMOTEIO : 0; -} - -static int si21_writereg(struct si21xx_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, data == 0x%02x, " - "ret == %i)\n", __func__, reg, data, ret); - - return (ret != 1) ? -EREMOTEIO : 0; -} - -static int si21_write(struct dvb_frontend *fe, const u8 buf[], int len) -{ - struct si21xx_state *state = fe->demodulator_priv; - - if (len != 2) - return -EINVAL; - - return si21_writereg(state, buf[0], buf[1]); -} - -static u8 si21_readreg(struct si21xx_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 si21_readregs(struct si21xx_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 : -1; -} - -static int si21xx_wait_diseqc_idle(struct si21xx_state *state, int timeout) -{ - unsigned long start = jiffies; - - dprintk("%s\n", __func__); - - while ((si21_readreg(state, LNB_CTRL_REG_1) & 0x8) == 8) { - if (jiffies - start > timeout) { - dprintk("%s: timeout!!\n", __func__); - return -ETIMEDOUT; - } - msleep(10); - }; - - return 0; -} - -static int si21xx_set_symbolrate(struct dvb_frontend *fe, u32 srate) -{ - struct si21xx_state *state = fe->demodulator_priv; - u32 sym_rate, data_rate; - int i; - u8 sym_rate_bytes[3]; - - dprintk("%s : srate = %i\n", __func__ , srate); - - if ((srate < 1000000) || (srate > 45000000)) - return -EINVAL; - - data_rate = srate; - sym_rate = 0; - - for (i = 0; i < 4; ++i) { - sym_rate /= 100; - sym_rate = sym_rate + ((data_rate % 100) * 0x800000) / - state->fs; - data_rate /= 100; - } - for (i = 0; i < 3; ++i) - sym_rate_bytes[i] = (u8)((sym_rate >> (i * 8)) & 0xff); - - si21_writeregs(state, SYM_RATE_REG_L, sym_rate_bytes, 0x03); - - return 0; -} - -static int si21xx_send_diseqc_msg(struct dvb_frontend *fe, - struct dvb_diseqc_master_cmd *m) -{ - struct si21xx_state *state = fe->demodulator_priv; - u8 lnb_status; - u8 LNB_CTRL_1; - int status; - - dprintk("%s\n", __func__); - - status = PASS; - LNB_CTRL_1 = 0; - - status |= si21_readregs(state, LNB_CTRL_STATUS_REG, &lnb_status, 0x01); - status |= si21_readregs(state, LNB_CTRL_REG_1, &lnb_status, 0x01); - - /*fill the FIFO*/ - status |= si21_writeregs(state, LNB_FIFO_REGS_0, m->msg, m->msg_len); - - LNB_CTRL_1 = (lnb_status & 0x70); - LNB_CTRL_1 |= m->msg_len; - - LNB_CTRL_1 |= 0x80; /* begin LNB signaling */ - - status |= si21_writeregs(state, LNB_CTRL_REG_1, &LNB_CTRL_1, 0x01); - - return status; -} - -static int si21xx_send_diseqc_burst(struct dvb_frontend *fe, - fe_sec_mini_cmd_t burst) -{ - struct si21xx_state *state = fe->demodulator_priv; - u8 val; - - dprintk("%s\n", __func__); - - if (si21xx_wait_diseqc_idle(state, 100) < 0) - return -ETIMEDOUT; - - val = (0x80 | si21_readreg(state, 0xc1)); - if (si21_writereg(state, LNB_CTRL_REG_1, - burst == SEC_MINI_A ? (val & ~0x10) : (val | 0x10))) - return -EREMOTEIO; - - if (si21xx_wait_diseqc_idle(state, 100) < 0) - return -ETIMEDOUT; - - if (si21_writereg(state, LNB_CTRL_REG_1, val)) - return -EREMOTEIO; - - return 0; -} -/* 30.06.2008 */ -static int si21xx_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone) -{ - struct si21xx_state *state = fe->demodulator_priv; - u8 val; - - dprintk("%s\n", __func__); - val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1)); - - switch (tone) { - case SEC_TONE_ON: - return si21_writereg(state, LNB_CTRL_REG_1, val | 0x20); - - case SEC_TONE_OFF: - return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x20)); - - default: - return -EINVAL; - } -} - -static int si21xx_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt) -{ - struct si21xx_state *state = fe->demodulator_priv; - - u8 val; - dprintk("%s: %s\n", __func__, - volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" : - volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??"); - - - val = (0x80 | si21_readreg(state, LNB_CTRL_REG_1)); - - switch (volt) { - case SEC_VOLTAGE_18: - return si21_writereg(state, LNB_CTRL_REG_1, val | 0x40); - break; - case SEC_VOLTAGE_13: - return si21_writereg(state, LNB_CTRL_REG_1, (val & ~0x40)); - break; - default: - return -EINVAL; - }; -} - -static int si21xx_init(struct dvb_frontend *fe) -{ - struct si21xx_state *state = fe->demodulator_priv; - int i; - int status = 0; - u8 reg1; - u8 val; - u8 reg2[2]; - - dprintk("%s\n", __func__); - - for (i = 0; ; i += 2) { - reg1 = serit_sp1511lhb_inittab[i]; - val = serit_sp1511lhb_inittab[i+1]; - if (reg1 == 0xff && val == 0xff) - break; - si21_writeregs(state, reg1, &val, 1); - } - - /*DVB QPSK SYSTEM MODE REG*/ - reg1 = 0x08; - si21_writeregs(state, SYSTEM_MODE_REG, ®1, 0x01); - - /*transport stream config*/ - /* - mode = PARALLEL; - sdata_form = LSB_FIRST; - clk_edge = FALLING_EDGE; - clk_mode = CLK_GAPPED_MODE; - strt_len = BYTE_WIDE; - sync_pol = ACTIVE_HIGH; - val_pol = ACTIVE_HIGH; - err_pol = ACTIVE_HIGH; - sclk_rate = 0x00; - parity = 0x00 ; - data_delay = 0x00; - clk_delay = 0x00; - pclk_smooth = 0x00; - */ - reg2[0] = - PARALLEL + (LSB_FIRST << 1) - + (FALLING_EDGE << 2) + (CLK_GAPPED_MODE << 3) - + (BYTE_WIDE << 4) + (ACTIVE_HIGH << 5) - + (ACTIVE_HIGH << 6) + (ACTIVE_HIGH << 7); - - reg2[1] = 0; - /* sclk_rate + (parity << 2) - + (data_delay << 3) + (clk_delay << 4) - + (pclk_smooth << 5); - */ - status |= si21_writeregs(state, TS_CTRL_REG_1, reg2, 0x02); - if (status != 0) - dprintk(" %s : TS Set Error\n", __func__); - - return 0; - -} - -static int si21_read_status(struct dvb_frontend *fe, fe_status_t *status) -{ - struct si21xx_state *state = fe->demodulator_priv; - u8 regs_read[2]; - u8 reg_read; - u8 i; - u8 lock; - u8 signal = si21_readreg(state, ANALOG_AGC_POWER_LEVEL_REG); - - si21_readregs(state, LOCK_STATUS_REG_1, regs_read, 0x02); - reg_read = 0; - - for (i = 0; i < 7; ++i) - reg_read |= ((regs_read[0] >> i) & 0x01) << (6 - i); - - lock = ((reg_read & 0x7f) | (regs_read[1] & 0x80)); - - dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, lock); - *status = 0; - - if (signal > 10) - *status |= FE_HAS_SIGNAL; - - if (lock & 0x2) - *status |= FE_HAS_CARRIER; - - if (lock & 0x20) - *status |= FE_HAS_VITERBI; - - if (lock & 0x40) - *status |= FE_HAS_SYNC; - - if ((lock & 0x7b) == 0x7b) - *status |= FE_HAS_LOCK; - - return 0; -} - -static int si21_read_signal_strength(struct dvb_frontend *fe, u16 *strength) -{ - struct si21xx_state *state = fe->demodulator_priv; - - /*status = si21_readreg(state, ANALOG_AGC_POWER_LEVEL_REG, - (u8*)agclevel, 0x01);*/ - - u16 signal = (3 * si21_readreg(state, 0x27) * - si21_readreg(state, 0x28)); - - dprintk("%s : AGCPWR: 0x%02x%02x, signal=0x%04x\n", __func__, - si21_readreg(state, 0x27), - si21_readreg(state, 0x28), (int) signal); - - signal <<= 4; - *strength = signal; - - return 0; -} - -static int si21_read_ber(struct dvb_frontend *fe, u32 *ber) -{ - struct si21xx_state *state = fe->demodulator_priv; - - dprintk("%s\n", __func__); - - if (state->errmode != STATUS_BER) - return 0; - - *ber = (si21_readreg(state, 0x1d) << 8) | - si21_readreg(state, 0x1e); - - return 0; -} - -static int si21_read_snr(struct dvb_frontend *fe, u16 *snr) -{ - struct si21xx_state *state = fe->demodulator_priv; - - s32 xsnr = 0xffff - ((si21_readreg(state, 0x24) << 8) | - si21_readreg(state, 0x25)); - xsnr = 3 * (xsnr - 0xa100); - *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr; - - dprintk("%s\n", __func__); - - return 0; -} - -static int si21_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) -{ - struct si21xx_state *state = fe->demodulator_priv; - - dprintk("%s\n", __func__); - - if (state->errmode != STATUS_UCBLOCKS) - *ucblocks = 0; - else - *ucblocks = (si21_readreg(state, 0x1d) << 8) | - si21_readreg(state, 0x1e); - - return 0; -} - -/* initiates a channel acquisition sequence - using the specified symbol rate and code rate */ -static int si21xx_setacquire(struct dvb_frontend *fe, int symbrate, - fe_code_rate_t crate) -{ - - struct si21xx_state *state = fe->demodulator_priv; - u8 coderates[] = { - 0x0, 0x01, 0x02, 0x04, 0x00, - 0x8, 0x10, 0x20, 0x00, 0x3f - }; - - u8 coderate_ptr; - int status; - u8 start_acq = 0x80; - u8 reg, regs[3]; - - dprintk("%s\n", __func__); - - status = PASS; - coderate_ptr = coderates[crate]; - - si21xx_set_symbolrate(fe, symbrate); - - /* write code rates to use in the Viterbi search */ - status |= si21_writeregs(state, - VIT_SRCH_CTRL_REG_1, - &coderate_ptr, 0x01); - - /* clear acq_start bit */ - status |= si21_readregs(state, ACQ_CTRL_REG_2, ®, 0x01); - reg &= ~start_acq; - status |= si21_writeregs(state, ACQ_CTRL_REG_2, ®, 0x01); - - /* use new Carrier Frequency Offset Estimator (QuickLock) */ - regs[0] = 0xCB; - regs[1] = 0x40; - regs[2] = 0xCB; - - status |= si21_writeregs(state, - TWO_DB_BNDWDTH_THRSHLD_REG, - ®s[0], 0x03); - reg = 0x56; - status |= si21_writeregs(state, - LSA_CTRL_REG_1, ®, 1); - reg = 0x05; - status |= si21_writeregs(state, - BLIND_SCAN_CTRL_REG, ®, 1); - /* start automatic acq */ - status |= si21_writeregs(state, - ACQ_CTRL_REG_2, &start_acq, 0x01); - - return status; -} - -static int si21xx_set_frontend(struct dvb_frontend *fe) -{ - struct si21xx_state *state = fe->demodulator_priv; - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - - /* freq Channel carrier frequency in KHz (i.e. 1550000 KHz) - datarate Channel symbol rate in Sps (i.e. 22500000 Sps)*/ - - /* in MHz */ - unsigned char coarse_tune_freq; - int fine_tune_freq; - unsigned char sample_rate = 0; - /* boolean */ - bool inband_interferer_ind; - - /* INTERMEDIATE VALUES */ - int icoarse_tune_freq; /* MHz */ - int ifine_tune_freq; /* MHz */ - unsigned int band_high; - unsigned int band_low; - unsigned int x1; - unsigned int x2; - int i; - bool inband_interferer_div2[ALLOWABLE_FS_COUNT]; - bool inband_interferer_div4[ALLOWABLE_FS_COUNT]; - int status; - - /* allowable sample rates for ADC in MHz */ - int afs[ALLOWABLE_FS_COUNT] = { 200, 192, 193, 194, 195, - 196, 204, 205, 206, 207 - }; - /* in MHz */ - int if_limit_high; - int if_limit_low; - int lnb_lo; - int lnb_uncertanity; - - int rf_freq; - int data_rate; - unsigned char regs[4]; - - dprintk("%s : FE_SET_FRONTEND\n", __func__); - - if (c->delivery_system != SYS_DVBS) { - dprintk("%s: unsupported delivery system selected (%d)\n", - __func__, c->delivery_system); - return -EOPNOTSUPP; - } - - for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) - inband_interferer_div2[i] = inband_interferer_div4[i] = false; - - if_limit_high = -700000; - if_limit_low = -100000; - /* in MHz */ - lnb_lo = 0; - lnb_uncertanity = 0; - - rf_freq = 10 * c->frequency ; - data_rate = c->symbol_rate / 100; - - status = PASS; - - band_low = (rf_freq - lnb_lo) - ((lnb_uncertanity * 200) - + (data_rate * 135)) / 200; - - band_high = (rf_freq - lnb_lo) + ((lnb_uncertanity * 200) - + (data_rate * 135)) / 200; - - - icoarse_tune_freq = 100000 * - (((rf_freq - lnb_lo) - - (if_limit_low + if_limit_high) / 2) - / 100000); - - ifine_tune_freq = (rf_freq - lnb_lo) - icoarse_tune_freq ; - - for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) { - x1 = ((rf_freq - lnb_lo) / (afs[i] * 2500)) * - (afs[i] * 2500) + afs[i] * 2500; - - x2 = ((rf_freq - lnb_lo) / (afs[i] * 2500)) * - (afs[i] * 2500); - - if (((band_low < x1) && (x1 < band_high)) || - ((band_low < x2) && (x2 < band_high))) - inband_interferer_div4[i] = true; - - } - - for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) { - x1 = ((rf_freq - lnb_lo) / (afs[i] * 5000)) * - (afs[i] * 5000) + afs[i] * 5000; - - x2 = ((rf_freq - lnb_lo) / (afs[i] * 5000)) * - (afs[i] * 5000); - - if (((band_low < x1) && (x1 < band_high)) || - ((band_low < x2) && (x2 < band_high))) - inband_interferer_div2[i] = true; - } - - inband_interferer_ind = true; - for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) { - if (inband_interferer_div2[i] || inband_interferer_div4[i]) { - inband_interferer_ind = false; - break; - } - } - - if (inband_interferer_ind) { - for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) { - if (!inband_interferer_div2[i]) { - sample_rate = (u8) afs[i]; - break; - } - } - } else { - for (i = 0; i < ALLOWABLE_FS_COUNT; ++i) { - if ((inband_interferer_div2[i] || - !inband_interferer_div4[i])) { - sample_rate = (u8) afs[i]; - break; - } - } - - } - - if (sample_rate > 207 || sample_rate < 192) - sample_rate = 200; - - fine_tune_freq = ((0x4000 * (ifine_tune_freq / 10)) / - ((sample_rate) * 1000)); - - coarse_tune_freq = (u8)(icoarse_tune_freq / 100000); - - regs[0] = sample_rate; - regs[1] = coarse_tune_freq; - regs[2] = fine_tune_freq & 0xFF; - regs[3] = fine_tune_freq >> 8 & 0xFF; - - status |= si21_writeregs(state, PLL_DIVISOR_REG, ®s[0], 0x04); - - state->fs = sample_rate;/*ADC MHz*/ - si21xx_setacquire(fe, c->symbol_rate, c->fec_inner); - - return 0; -} - -static int si21xx_sleep(struct dvb_frontend *fe) -{ - struct si21xx_state *state = fe->demodulator_priv; - u8 regdata; - - dprintk("%s\n", __func__); - - si21_readregs(state, SYSTEM_MODE_REG, ®data, 0x01); - regdata |= 1 << 6; - si21_writeregs(state, SYSTEM_MODE_REG, ®data, 0x01); - state->initialised = 0; - - return 0; -} - -static void si21xx_release(struct dvb_frontend *fe) -{ - struct si21xx_state *state = fe->demodulator_priv; - - dprintk("%s\n", __func__); - - kfree(state); -} - -static struct dvb_frontend_ops si21xx_ops = { - .delsys = { SYS_DVBS }, - .info = { - .name = "SL SI21XX DVB-S", - .frequency_min = 950000, - .frequency_max = 2150000, - .frequency_stepsize = 125, /* kHz for QPSK frontends */ - .frequency_tolerance = 0, - .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 = si21xx_release, - .init = si21xx_init, - .sleep = si21xx_sleep, - .write = si21_write, - .read_status = si21_read_status, - .read_ber = si21_read_ber, - .read_signal_strength = si21_read_signal_strength, - .read_snr = si21_read_snr, - .read_ucblocks = si21_read_ucblocks, - .diseqc_send_master_cmd = si21xx_send_diseqc_msg, - .diseqc_send_burst = si21xx_send_diseqc_burst, - .set_tone = si21xx_set_tone, - .set_voltage = si21xx_set_voltage, - - .set_frontend = si21xx_set_frontend, -}; - -struct dvb_frontend *si21xx_attach(const struct si21xx_config *config, - struct i2c_adapter *i2c) -{ - struct si21xx_state *state = NULL; - int id; - - dprintk("%s\n", __func__); - - /* allocate memory for the internal state */ - state = kzalloc(sizeof(struct si21xx_state), GFP_KERNEL); - if (state == NULL) - goto error; - - /* setup the state */ - state->config = config; - state->i2c = i2c; - state->initialised = 0; - state->errmode = STATUS_BER; - - /* check if the demod is there */ - id = si21_readreg(state, SYSTEM_MODE_REG); - si21_writereg(state, SYSTEM_MODE_REG, id | 0x40); /* standby off */ - msleep(200); - id = si21_readreg(state, 0x00); - - /* register 0x00 contains: - 0x34 for SI2107 - 0x24 for SI2108 - 0x14 for SI2109 - 0x04 for SI2110 - */ - if (id != 0x04 && id != 0x14) - goto error; - - /* create dvb_frontend */ - memcpy(&state->frontend.ops, &si21xx_ops, - sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; - -error: - kfree(state); - return NULL; -} -EXPORT_SYMBOL(si21xx_attach); - -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -MODULE_DESCRIPTION("SL SI21XX DVB Demodulator driver"); -MODULE_AUTHOR("Igor M. Liplianin"); -MODULE_LICENSE("GPL"); |
