diff options
Diffstat (limited to 'drivers/media/tuners/it913x.c')
-rw-r--r-- | drivers/media/tuners/it913x.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/drivers/media/tuners/it913x.c b/drivers/media/tuners/it913x.c new file mode 100644 index 0000000..4627925 --- /dev/null +++ b/drivers/media/tuners/it913x.c @@ -0,0 +1,463 @@ +/* + * ITE Tech IT9137 silicon tuner driver + * + * 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 "it913x_priv.h" + +struct it913x_state { + struct i2c_adapter *i2c_adap; + u8 i2c_addr; + u8 chip_ver; + u8 tuner_type; + u8 firmware_ver; + u16 tun_xtal; + u8 tun_fdiv; + u8 tun_clk_mode; + u32 tun_fn_min; +}; + +/* read multiple registers */ +static int it913x_rd_regs(struct it913x_state *state, + u32 reg, u8 *data, u8 count) +{ + int ret; + u8 b[3]; + struct i2c_msg msg[2] = { + { .addr = state->i2c_addr, .flags = 0, + .buf = b, .len = sizeof(b) }, + { .addr = state->i2c_addr, .flags = I2C_M_RD, + .buf = data, .len = count } + }; + + b[0] = (u8)(reg >> 16) & 0xff; + b[1] = (u8)(reg >> 8) & 0xff; + b[2] = (u8) reg & 0xff; + b[0] |= 0x80; /* All reads from demodulator */ + + ret = i2c_transfer(state->i2c_adap, msg, 2); + + return ret; +} + +/* read single register */ +static int it913x_rd_reg(struct it913x_state *state, u32 reg) +{ + int ret; + u8 b[1]; + + ret = it913x_rd_regs(state, reg, &b[0], sizeof(b)); + return (ret < 0) ? -ENODEV : b[0]; +} + +/* write multiple registers */ +static int it913x_wr_regs(struct it913x_state *state, + u8 pro, u32 reg, u8 buf[], u8 count) +{ + u8 b[256]; + struct i2c_msg msg[1] = { + { .addr = state->i2c_addr, .flags = 0, + .buf = b, .len = 3 + count } + }; + int ret; + + b[0] = (u8)(reg >> 16) & 0xff; + b[1] = (u8)(reg >> 8) & 0xff; + b[2] = (u8) reg & 0xff; + memcpy(&b[3], buf, count); + + if (pro == PRO_DMOD) + b[0] |= 0x80; + + ret = i2c_transfer(state->i2c_adap, msg, 1); + + if (ret < 0) + return -EIO; + + return 0; +} + +/* write single register */ +static int it913x_wr_reg(struct it913x_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_wr_regs(state, pro, reg, &b[s], sizeof(b) - s); + + return ret; +} + +static int it913x_script_loader(struct it913x_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_wr_regs(state, loadscript[i].pro, + loadscript[i].address, + loadscript[i].reg, loadscript[i].count); + if (ret < 0) + return -ENODEV; + } + return 0; +} + +static int it913x_init(struct dvb_frontend *fe) +{ + struct it913x_state *state = fe->tuner_priv; + int ret, i, reg; + u8 val, nv_val; + u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2}; + u8 b[2]; + + reg = it913x_rd_reg(state, 0xec86); + switch (reg) { + case 0: + state->tun_clk_mode = reg; + state->tun_xtal = 2000; + state->tun_fdiv = 3; + val = 16; + break; + case -ENODEV: + /* FIXME: these are just avoid divide by 0 */ + state->tun_xtal = 2000; + state->tun_fdiv = 3; + return -ENODEV; + case 1: + default: + state->tun_clk_mode = reg; + state->tun_xtal = 640; + state->tun_fdiv = 1; + val = 6; + break; + } + + reg = it913x_rd_reg(state, 0xed03); + + if (reg < 0) + return -ENODEV; + else if (reg < ARRAY_SIZE(nv)) + nv_val = nv[reg]; + else + nv_val = 2; + + for (i = 0; i < 50; i++) { + ret = it913x_rd_regs(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); + dev_dbg(&state->i2c_adap->dev, "%s: Tuner fn_min %d\n", __func__, + state->tun_fn_min); + + if (state->chip_ver > 1) + msleep(50); + else { + for (i = 0; i < 50; i++) { + reg = it913x_rd_reg(state, 0xec82); + if (reg > 0) + break; + if (reg < 0) + return -ENODEV; + udelay(2000); + } + } + + /* Power Up Tuner - common all versions */ + ret = it913x_wr_reg(state, PRO_DMOD, 0xec40, 0x1); + ret |= it913x_wr_reg(state, PRO_DMOD, 0xec57, 0x0); + ret |= it913x_wr_reg(state, PRO_DMOD, 0xec58, 0x0); + + return it913x_wr_reg(state, PRO_DMOD, 0xed81, val); +} + +static int it9137_set_params(struct dvb_frontend *fe) +{ + struct it913x_state *state = fe->tuner_priv; + struct it913xset *set_tuner = set_it9137_template; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + u32 bandwidth = p->bandwidth_hz; + u32 frequency_m = p->frequency; + 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; + + if (state->firmware_ver == 1) + set_tuner = set_it9135_template; + else + set_tuner = set_it9137_template; + + dev_dbg(&state->i2c_adap->dev, "%s: Tuner Frequency %d Bandwidth %d\n", + __func__, 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; + + switch (bandwidth) { + case 5000000: + bw = 0; + break; + case 6000000: + bw = 2; + break; + case 7000000: + bw = 4; + break; + default: + case 8000000: + bw = 6; + break; + } + + 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_rd_reg(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; + + dev_dbg(&state->i2c_adap->dev, "%s: High Frequency = %04x\n", + __func__, temp_f); + + /* Lower frequency */ + set_tuner[5].reg[0] = freq & 0xff; + set_tuner[6].reg[0] = (freq >> 8) & 0xff; + + dev_dbg(&state->i2c_adap->dev, "%s: low Frequency = %04x\n", + __func__, freq); + + ret = it913x_script_loader(state, set_tuner); + + 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_sleep(struct dvb_frontend *fe) +{ + struct it913x_state *state = fe->tuner_priv; + + if (state->chip_ver == 0x01) + return it913x_script_loader(state, it9135ax_tuner_off); + else + return it913x_script_loader(state, it9137_tuner_off); +} + +static int it913x_release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + return 0; +} + +static const struct dvb_tuner_ops it913x_tuner_ops = { + .info = { + .name = "ITE Tech IT913X", + .frequency_min = 174000000, + .frequency_max = 862000000, + }, + + .release = it913x_release, + + .init = it913x_init, + .sleep = it913x_sleep, + .set_params = it9137_set_params, +}; + +struct dvb_frontend *it913x_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c_adap, u8 i2c_addr, u8 config) +{ + struct it913x_state *state = NULL; + int ret; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct it913x_state), GFP_KERNEL); + if (state == NULL) + return NULL; + + state->i2c_adap = i2c_adap; + state->i2c_addr = i2c_addr; + + switch (config) { + case AF9033_TUNER_IT9135_38: + case AF9033_TUNER_IT9135_51: + case AF9033_TUNER_IT9135_52: + state->chip_ver = 0x01; + break; + case AF9033_TUNER_IT9135_60: + case AF9033_TUNER_IT9135_61: + case AF9033_TUNER_IT9135_62: + state->chip_ver = 0x02; + break; + default: + dev_dbg(&i2c_adap->dev, + "%s: invalid config=%02x\n", __func__, config); + goto error; + } + + state->tuner_type = config; + state->firmware_ver = 1; + + /* tuner RF initial */ + ret = it913x_wr_reg(state, PRO_DMOD, 0xec4c, 0x68); + if (ret < 0) + goto error; + + fe->tuner_priv = state; + memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops, + sizeof(struct dvb_tuner_ops)); + + dev_info(&i2c_adap->dev, + "%s: ITE Tech IT913X successfully attached\n", + KBUILD_MODNAME); + dev_dbg(&i2c_adap->dev, "%s: config=%02x chip_ver=%02x\n", + __func__, config, state->chip_ver); + + return fe; +error: + kfree(state); + return NULL; +} +EXPORT_SYMBOL(it913x_attach); + +MODULE_DESCRIPTION("ITE Tech IT913X silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); |