diff options
Diffstat (limited to 'drivers/media/dvb/frontends/it913x-fe.c')
| -rw-r--r-- | drivers/media/dvb/frontends/it913x-fe.c | 839 |
1 files changed, 839 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/it913x-fe.c b/drivers/media/dvb/frontends/it913x-fe.c new file mode 100644 index 000000000000..d4bd24eb4700 --- /dev/null +++ b/drivers/media/dvb/frontends/it913x-fe.c @@ -0,0 +1,839 @@ +/* + * Driver for it913x-fe Frontend + * + * with support for on chip it9137 integral tuner + * + * Copyright (C) 2011 Malcolm Priestley (tvboxspy@gmail.com) + * IT9137 Copyright (C) ITE Tech Inc. + * + * 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/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/types.h> + +#include "dvb_frontend.h" +#include "it913x-fe.h" +#include "it913x-fe-priv.h" + +static int it913x_debug; + +module_param_named(debug, it913x_debug, int, 0644); +MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able))."); + +#define dprintk(level, args...) do { \ + if (level & it913x_debug) \ + printk(KERN_DEBUG "it913x-fe: " args); \ +} while (0) + +#define deb_info(args...) dprintk(0x01, args) +#define debug_data_snipet(level, name, p) \ + dprintk(level, name" (%02x%02x%02x%02x%02x%02x%02x%02x)", \ + *p, *(p+1), *(p+2), *(p+3), *(p+4), \ + *(p+5), *(p+6), *(p+7)); + +struct it913x_fe_state { + struct dvb_frontend frontend; + struct i2c_adapter *i2c_adap; + u8 i2c_addr; + u32 frequency; + u8 adf; + u32 crystalFrequency; + u32 adcFrequency; + u8 tuner_type; + struct adctable *table; + fe_status_t it913x_status; + u16 tun_xtal; + u8 tun_fdiv; + u8 tun_clk_mode; + u32 tun_fn_min; +}; + +static int it913x_read_reg(struct it913x_fe_state *state, + u32 reg, u8 *data, u8 count) +{ + int ret; + u8 pro = PRO_DMOD; /* All reads from demodulator */ + u8 b[4]; + struct i2c_msg msg[2] = { + { .addr = state->i2c_addr + (pro << 1), .flags = 0, + .buf = b, .len = sizeof(b) }, + { .addr = state->i2c_addr + (pro << 1), .flags = I2C_M_RD, + .buf = data, .len = count } + }; + b[0] = (u8) reg >> 24; + b[1] = (u8)(reg >> 16) & 0xff; + b[2] = (u8)(reg >> 8) & 0xff; + b[3] = (u8) reg & 0xff; + + ret = i2c_transfer(state->i2c_adap, msg, 2); + + return ret; +} + +static int it913x_read_reg_u8(struct it913x_fe_state *state, u32 reg) +{ + int ret; + u8 b[1]; + ret = it913x_read_reg(state, reg, &b[0], sizeof(b)); + return (ret < 0) ? -ENODEV : b[0]; +} + +static int it913x_write(struct it913x_fe_state *state, + u8 pro, u32 reg, u8 buf[], u8 count) +{ + u8 b[256]; + struct i2c_msg msg[1] = { + { .addr = state->i2c_addr + (pro << 1), .flags = 0, + .buf = b, .len = count + 4 } + }; + int ret; + + b[0] = (u8) reg >> 24; + b[1] = (u8)(reg >> 16) & 0xff; + b[2] = (u8)(reg >> 8) & 0xff; + b[3] = (u8) reg & 0xff; + memcpy(&b[4], buf, count); + + ret = i2c_transfer(state->i2c_adap, msg, 1); + + if (ret < 0) + return -EIO; + + return 0; +} + +static int it913x_write_reg(struct it913x_fe_state *state, + u8 pro, u32 reg, u32 data) +{ + int ret; + u8 b[4]; + u8 s; + + b[0] = data >> 24; + b[1] = (data >> 16) & 0xff; + b[2] = (data >> 8) & 0xff; + b[3] = data & 0xff; + /* expand write as needed */ + if (data < 0x100) + s = 3; + else if (data < 0x1000) + s = 2; + else if (data < 0x100000) + s = 1; + else + s = 0; + + ret = it913x_write(state, pro, reg, &b[s], sizeof(b) - s); + + return ret; +} + +static int it913x_fe_script_loader(struct it913x_fe_state *state, + struct it913xset *loadscript) +{ + int ret, i; + if (loadscript == NULL) + return -EINVAL; + + for (i = 0; i < 1000; ++i) { + if (loadscript[i].pro == 0xff) + break; + ret = it913x_write(state, loadscript[i].pro, + loadscript[i].address, + loadscript[i].reg, loadscript[i].count); + if (ret < 0) + return -ENODEV; + } + return 0; +} + +static int it913x_init_tuner(struct it913x_fe_state *state) +{ + int ret, i, reg; + u8 val, nv_val; + u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2}; + u8 b[2]; + + reg = it913x_read_reg_u8(state, 0xec86); + switch (reg) { + case 0: + state->tun_clk_mode = reg; + state->tun_xtal = 2000; + state->tun_fdiv = 3; + val = 16; + break; + case -ENODEV: + return -ENODEV; + case 1: + default: + state->tun_clk_mode = reg; + state->tun_xtal = 640; + state->tun_fdiv = 1; + val = 6; + break; + } + + reg = it913x_read_reg_u8(state, 0xed03); + + if (reg < 0) + return -ENODEV; + else if (reg < sizeof(nv)) + nv_val = nv[reg]; + else + nv_val = 2; + + for (i = 0; i < 50; i++) { + ret = it913x_read_reg(state, 0xed23, &b[0], sizeof(b)); + reg = (b[1] << 8) + b[0]; + if (reg > 0) + break; + if (ret < 0) + return -ENODEV; + udelay(2000); + } + state->tun_fn_min = state->tun_xtal * reg; + state->tun_fn_min /= (state->tun_fdiv * nv_val); + deb_info("Tuner fn_min %d", state->tun_fn_min); + + for (i = 0; i < 50; i++) { + reg = it913x_read_reg_u8(state, 0xec82); + if (reg > 0) + break; + if (reg < 0) + return -ENODEV; + udelay(2000); + } + + return it913x_write_reg(state, PRO_DMOD, 0xed81, val); +} + +static int it9137_set_tuner(struct it913x_fe_state *state, + enum fe_bandwidth bandwidth, u32 frequency_m) +{ + struct it913xset *set_tuner = set_it9137_template; + int ret, reg; + u32 frequency = frequency_m / 1000; + u32 freq, temp_f, tmp; + u16 iqik_m_cal; + u16 n_div; + u8 n; + u8 l_band; + u8 lna_band; + u8 bw; + + deb_info("Tuner Frequency %d Bandwidth %d", frequency, bandwidth); + + if (frequency >= 51000 && frequency <= 440000) { + l_band = 0; + lna_band = 0; + } else if (frequency > 440000 && frequency <= 484000) { + l_band = 1; + lna_band = 1; + } else if (frequency > 484000 && frequency <= 533000) { + l_band = 1; + lna_band = 2; + } else if (frequency > 533000 && frequency <= 587000) { + l_band = 1; + lna_band = 3; + } else if (frequency > 587000 && frequency <= 645000) { + l_band = 1; + lna_band = 4; + } else if (frequency > 645000 && frequency <= 710000) { + l_band = 1; + lna_band = 5; + } else if (frequency > 710000 && frequency <= 782000) { + l_band = 1; + lna_band = 6; + } else if (frequency > 782000 && frequency <= 860000) { + l_band = 1; + lna_band = 7; + } else if (frequency > 1450000 && frequency <= 1492000) { + l_band = 1; + lna_band = 0; + } else if (frequency > 1660000 && frequency <= 1685000) { + l_band = 1; + lna_band = 1; + } else + return -EINVAL; + set_tuner[0].reg[0] = lna_band; + + if (bandwidth == BANDWIDTH_5_MHZ) + bw = 0; + else if (bandwidth == BANDWIDTH_6_MHZ) + bw = 2; + else if (bandwidth == BANDWIDTH_7_MHZ) + bw = 4; + else if (bandwidth == BANDWIDTH_8_MHZ) + bw = 6; + else + bw = 6; + + set_tuner[1].reg[0] = bw; + set_tuner[2].reg[0] = 0xa0 | (l_band << 3); + + if (frequency > 53000 && frequency <= 74000) { + n_div = 48; + n = 0; + } else if (frequency > 74000 && frequency <= 111000) { + n_div = 32; + n = 1; + } else if (frequency > 111000 && frequency <= 148000) { + n_div = 24; + n = 2; + } else if (frequency > 148000 && frequency <= 222000) { + n_div = 16; + n = 3; + } else if (frequency > 222000 && frequency <= 296000) { + n_div = 12; + n = 4; + } else if (frequency > 296000 && frequency <= 445000) { + n_div = 8; + n = 5; + } else if (frequency > 445000 && frequency <= state->tun_fn_min) { + n_div = 6; + n = 6; + } else if (frequency > state->tun_fn_min && frequency <= 950000) { + n_div = 4; + n = 7; + } else if (frequency > 1450000 && frequency <= 1680000) { + n_div = 2; + n = 0; + } else + return -EINVAL; + + reg = it913x_read_reg_u8(state, 0xed81); + iqik_m_cal = (u16)reg * n_div; + + if (reg < 0x20) { + if (state->tun_clk_mode == 0) + iqik_m_cal = (iqik_m_cal * 9) >> 5; + else + iqik_m_cal >>= 1; + } else { + iqik_m_cal = 0x40 - iqik_m_cal; + if (state->tun_clk_mode == 0) + iqik_m_cal = ~((iqik_m_cal * 9) >> 5); + else + iqik_m_cal = ~(iqik_m_cal >> 1); + } + + temp_f = frequency * (u32)n_div * (u32)state->tun_fdiv; + freq = temp_f / state->tun_xtal; + tmp = freq * state->tun_xtal; + + if ((temp_f - tmp) >= (state->tun_xtal >> 1)) + freq++; + + freq += (u32) n << 13; + /* Frequency OMEGA_IQIK_M_CAL_MID*/ + temp_f = freq + (u32)iqik_m_cal; + + set_tuner[3].reg[0] = temp_f & 0xff; + set_tuner[4].reg[0] = (temp_f >> 8) & 0xff; + + deb_info("High Frequency = %04x", temp_f); + + /* Lower frequency */ + set_tuner[5].reg[0] = freq & 0xff; + set_tuner[6].reg[0] = (freq >> 8) & 0xff; + + deb_info("low Frequency = %04x", freq); + + ret = it913x_fe_script_loader(state, set_tuner); + + return (ret < 0) ? -ENODEV : 0; +} + +static int it913x_fe_select_bw(struct it913x_fe_state *state, + enum fe_bandwidth bandwidth, u32 adcFrequency) +{ + int ret, i; + u8 buffer[256]; + u32 coeff[8]; + u16 bfsfcw_fftinx_ratio; + u16 fftinx_bfsfcw_ratio; + u8 count; + u8 bw; + u8 adcmultiplier; + + deb_info("Bandwidth %d Adc %d", bandwidth, adcFrequency); + + if (bandwidth == BANDWIDTH_5_MHZ) + bw = 3; + else if (bandwidth == BANDWIDTH_6_MHZ) + bw = 0; + else if (bandwidth == BANDWIDTH_7_MHZ) + bw = 1; + else if (bandwidth == BANDWIDTH_8_MHZ) + bw = 2; + else + bw = 2; + + ret = it913x_write_reg(state, PRO_DMOD, REG_BW, bw); + + if (state->table == NULL) + return -EINVAL; + + /* In write order */ + coeff[0] = state->table[bw].coeff_1_2048; + coeff[1] = state->table[bw].coeff_2_2k; + coeff[2] = state->table[bw].coeff_1_8191; + coeff[3] = state->table[bw].coeff_1_8192; + coeff[4] = state->table[bw].coeff_1_8193; + coeff[5] = state->table[bw].coeff_2_8k; + coeff[6] = state->table[bw].coeff_1_4096; + coeff[7] = state->table[bw].coeff_2_4k; + bfsfcw_fftinx_ratio = state->table[bw].bfsfcw_fftinx_ratio; + fftinx_bfsfcw_ratio = state->table[bw].fftinx_bfsfcw_ratio; + + /* ADC multiplier */ + ret = it913x_read_reg_u8(state, ADC_X_2); + if (ret < 0) + return -EINVAL; + + adcmultiplier = ret; + + count = 0; + + /* Build Buffer for COEFF Registers */ + for (i = 0; i < 8; i++) { + if (adcmultiplier == 1) + coeff[i] /= 2; + buffer[count++] = (coeff[i] >> 24) & 0x3; + buffer[count++] = (coeff[i] >> 16) & 0xff; + buffer[count++] = (coeff[i] >> 8) & 0xff; + buffer[count++] = coeff[i] & 0xff; + } + + /* bfsfcw_fftinx_ratio register 0x21-0x22 */ + buffer[count++] = bfsfcw_fftinx_ratio & 0xff; + buffer[count++] = (bfsfcw_fftinx_ratio >> 8) & 0xff; + /* fftinx_bfsfcw_ratio register 0x23-0x24 */ + buffer[count++] = fftinx_bfsfcw_ratio & 0xff; + buffer[count++] = (fftinx_bfsfcw_ratio >> 8) & 0xff; + /* start at COEFF_1_2048 and write through to fftinx_bfsfcw_ratio*/ + ret = it913x_write(state, PRO_DMOD, COEFF_1_2048, buffer, count); + + for (i = 0; i < 42; i += 8) + debug_data_snipet(0x1, "Buffer", &buffer[i]); + + return ret; +} + + + +static int it913x_fe_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + int ret, i; + fe_status_t old_status = state->it913x_status; + *status = 0; + + if (state->it913x_status == 0) { + ret = it913x_read_reg_u8(state, EMPTY_CHANNEL_STATUS); + if (ret == 0x1) { + *status |= FE_HAS_SIGNAL; + for (i = 0; i < 40; i++) { + ret = it913x_read_reg_u8(state, MP2IF_SYNC_LK); + if (ret == 0x1) + break; + msleep(25); + } + if (ret == 0x1) + *status |= FE_HAS_CARRIER + | FE_HAS_VITERBI + | FE_HAS_SYNC; + state->it913x_status = *status; + } + } + + if (state->it913x_status & FE_HAS_SYNC) { + ret = it913x_read_reg_u8(state, TPSD_LOCK); + if (ret == 0x1) + *status |= FE_HAS_LOCK + | state->it913x_status; + else + state->it913x_status = 0; + if (old_status != state->it913x_status) + ret = it913x_write_reg(state, PRO_LINK, GPIOH3_O, ret); + } + + return 0; +} + +static int it913x_fe_read_signal_strength(struct dvb_frontend *fe, + u16 *strength) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + int ret = it913x_read_reg_u8(state, SIGNAL_LEVEL); + /*SIGNAL_LEVEL always returns 100%! so using FE_HAS_SIGNAL as switch*/ + if (state->it913x_status & FE_HAS_SIGNAL) + ret = (ret * 0xff) / 0x64; + else + ret = 0x0; + ret |= ret << 0x8; + *strength = ret; + return 0; +} + +static int it913x_fe_read_snr(struct dvb_frontend *fe, u16* snr) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + int ret = it913x_read_reg_u8(state, SIGNAL_QUALITY); + ret = (ret * 0xff) / 0x64; + ret |= (ret << 0x8); + *snr = ~ret; + return 0; +} + +static int it913x_fe_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + *ber = 0; + return 0; +} + +static int it913x_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + *ucblocks = 0; + return 0; +} + +static int it913x_fe_get_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + int ret; + u8 reg[8]; + + ret = it913x_read_reg(state, REG_TPSD_TX_MODE, reg, sizeof(reg)); + + if (reg[3] < 3) + p->u.ofdm.constellation = fe_con[reg[3]]; + + if (reg[0] < 3) + p->u.ofdm.transmission_mode = fe_mode[reg[0]]; + + if (reg[1] < 4) + p->u.ofdm.guard_interval = fe_gi[reg[1]]; + + if (reg[2] < 4) + p->u.ofdm.hierarchy_information = fe_hi[reg[2]]; + + p->u.ofdm.code_rate_HP = (reg[6] < 6) ? fe_code[reg[6]] : FEC_NONE; + p->u.ofdm.code_rate_LP = (reg[7] < 6) ? fe_code[reg[7]] : FEC_NONE; + + return 0; +} + +static int it913x_fe_set_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + int ret, i; + u8 empty_ch, last_ch; + + state->it913x_status = 0; + + /* Set bw*/ + ret = it913x_fe_select_bw(state, p->u.ofdm.bandwidth, + state->adcFrequency); + + /* Training Mode Off */ + ret = it913x_write_reg(state, PRO_LINK, TRAINING_MODE, 0x0); + + /* Clear Empty Channel */ + ret = it913x_write_reg(state, PRO_DMOD, EMPTY_CHANNEL_STATUS, 0x0); + + /* Clear bits */ + ret = it913x_write_reg(state, PRO_DMOD, MP2IF_SYNC_LK, 0x0); + /* LED on */ + ret = it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x1); + /* Select Band*/ + if ((p->frequency >= 51000000) && (p->frequency <= 230000000)) + i = 0; + else if ((p->frequency >= 350000000) && (p->frequency <= 900000000)) + i = 1; + else if ((p->frequency >= 1450000000) && (p->frequency <= 1680000000)) + i = 2; + else + return -EOPNOTSUPP; + + ret = it913x_write_reg(state, PRO_DMOD, FREE_BAND, i); + + deb_info("Frontend Set Tuner Type %02x", state->tuner_type); + switch (state->tuner_type) { + case IT9137: /* Tuner type 0x38 */ + ret = it9137_set_tuner(state, + p->u.ofdm.bandwidth, p->frequency); + break; + default: + if (fe->ops.tuner_ops.set_params) { + fe->ops.tuner_ops.set_params(fe, p); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + } + break; + } + /* LED off */ + ret = it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x0); + /* Trigger ofsm */ + ret = it913x_write_reg(state, PRO_DMOD, TRIGGER_OFSM, 0x0); + last_ch = 2; + for (i = 0; i < 40; ++i) { + empty_ch = it913x_read_reg_u8(state, EMPTY_CHANNEL_STATUS); + if (last_ch == 1 && empty_ch == 1) + break; + if (last_ch == 2 && empty_ch == 2) + return 0; + last_ch = empty_ch; + msleep(25); + } + for (i = 0; i < 40; ++i) { + if (it913x_read_reg_u8(state, D_TPSD_LOCK) == 1) + break; + msleep(25); + } + + state->frequency = p->frequency; + return 0; +} + +static int it913x_fe_suspend(struct it913x_fe_state *state) +{ + int ret, i; + u8 b; + + ret = it913x_write_reg(state, PRO_DMOD, SUSPEND_FLAG, 0x1); + + ret |= it913x_write_reg(state, PRO_DMOD, TRIGGER_OFSM, 0x0); + + for (i = 0; i < 128; i++) { + ret = it913x_read_reg(state, SUSPEND_FLAG, &b, 1); + if (ret < 0) + return -ENODEV; + if (b == 0) + break; + + } + + ret |= it913x_write_reg(state, PRO_DMOD, AFE_MEM0, 0x8); + /* Turn LED off */ + ret |= it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x0); + + ret |= it913x_fe_script_loader(state, it9137_tuner_off); + + return (ret < 0) ? -ENODEV : 0; +} + +/* Power sequence */ +/* Power Up Tuner on -> Frontend suspend off -> Tuner clk on */ +/* Power Down Frontend suspend on -> Tuner clk off -> Tuner off */ + +static int it913x_fe_sleep(struct dvb_frontend *fe) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + return it913x_fe_suspend(state); +} + +static u32 compute_div(u32 a, u32 b, u32 x) +{ + u32 res = 0; + u32 c = 0; + u32 i = 0; + + if (a > b) { + c = a / b; + a = a - c * b; + } + + for (i = 0; i < x; i++) { + if (a >= b) { + res += 1; + a -= b; + } + a <<= 1; + res <<= 1; + } + + res = (c << x) + res; + + return res; +} + +static int it913x_fe_start(struct it913x_fe_state *state) +{ + struct it913xset *set_fe; + struct it913xset *set_mode; + int ret; + u8 adf = (state->adf & 0xf); + u32 adc, xtal; + u8 b[4]; + + ret = it913x_init_tuner(state); + + if (adf < 12) { + state->crystalFrequency = fe_clockTable[adf].xtal ; + state->table = fe_clockTable[adf].table; + state->adcFrequency = state->table->adcFrequency; + + adc = compute_div(state->adcFrequency, 1000000ul, 19ul); + xtal = compute_div(state->crystalFrequency, 1000000ul, 19ul); + + } else + return -EINVAL; + + deb_info("Xtal Freq :%d Adc Freq :%d Adc %08x Xtal %08x", + state->crystalFrequency, state->adcFrequency, adc, xtal); + + /* Set LED indicator on GPIOH3 */ + ret = it913x_write_reg(state, PRO_LINK, GPIOH3_EN, 0x1); + ret |= it913x_write_reg(state, PRO_LINK, GPIOH3_ON, 0x1); + ret |= it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x1); + + ret |= it913x_write_reg(state, PRO_LINK, 0xf641, state->tuner_type); + ret |= it913x_write_reg(state, PRO_DMOD, 0xf5ca, 0x01); + ret |= it913x_write_reg(state, PRO_DMOD, 0xf715, 0x01); + + b[0] = xtal & 0xff; + b[1] = (xtal >> 8) & 0xff; + b[2] = (xtal >> 16) & 0xff; + b[3] = (xtal >> 24); + ret |= it913x_write(state, PRO_DMOD, XTAL_CLK, b , 4); + + b[0] = adc & 0xff; + b[1] = (adc >> 8) & 0xff; + b[2] = (adc >> 16) & 0xff; + ret |= it913x_write(state, PRO_DMOD, ADC_FREQ, b, 3); + + switch (state->tuner_type) { + case IT9137: /* Tuner type 0x38 */ + set_fe = it9137_set; + break; + default: + return -EINVAL; + } + + /* set the demod */ + ret = it913x_fe_script_loader(state, set_fe); + /* Always solo frontend */ + set_mode = set_solo_fe; + ret |= it913x_fe_script_loader(state, set_mode); + + ret |= it913x_fe_suspend(state); + return 0; +} + +static int it913x_fe_init(struct dvb_frontend *fe) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + int ret = 0; + /* Power Up Tuner - common all versions */ + ret = it913x_write_reg(state, PRO_DMOD, 0xec40, 0x1); + + ret |= it913x_write_reg(state, PRO_DMOD, AFE_MEM0, 0x0); + + ret |= it913x_fe_script_loader(state, init_1); + + switch (state->tuner_type) { + case IT9137: + ret |= it913x_write_reg(state, PRO_DMOD, 0xfba8, 0x0); + break; + default: + return -EINVAL; + } + + return (ret < 0) ? -ENODEV : 0; +} + +static void it913x_fe_release(struct dvb_frontend *fe) +{ + struct it913x_fe_state *state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops it913x_fe_ofdm_ops; + +struct dvb_frontend *it913x_fe_attach(struct i2c_adapter *i2c_adap, + u8 i2c_addr, u8 adf, u8 type) +{ + struct it913x_fe_state *state = NULL; + int ret; + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct it913x_fe_state), GFP_KERNEL); + if (state == NULL) + goto error; + + state->i2c_adap = i2c_adap; + state->i2c_addr = i2c_addr; + state->adf = adf; + state->tuner_type = type; + + ret = it913x_fe_start(state); + if (ret < 0) + goto error; + + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &it913x_fe_ofdm_ops, + sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + return &state->frontend; +error: + kfree(state); + return NULL; +} +EXPORT_SYMBOL(it913x_fe_attach); + +static struct dvb_frontend_ops it913x_fe_ofdm_ops = { + + .info = { + .name = "it913x-fe DVB-T", + .type = FE_OFDM, + .frequency_min = 51000000, + .frequency_max = 1680000000, + .frequency_stepsize = 62500, + .caps = 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_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | + FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | + FE_CAN_HIERARCHY_AUTO, + }, + + .release = it913x_fe_release, + + .init = it913x_fe_init, + .sleep = it913x_fe_sleep, + + .set_frontend = it913x_fe_set_frontend, + .get_frontend = it913x_fe_get_frontend, + + .read_status = it913x_fe_read_status, + .read_signal_strength = it913x_fe_read_signal_strength, + .read_snr = it913x_fe_read_snr, + .read_ber = it913x_fe_read_ber, + .read_ucblocks = it913x_fe_read_ucblocks, +}; + +MODULE_DESCRIPTION("it913x Frontend and it9137 tuner"); +MODULE_AUTHOR("Malcolm Priestley tvboxspy@gmail.com"); +MODULE_VERSION("1.07"); +MODULE_LICENSE("GPL"); |
