diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/friio-fe.c')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/friio-fe.c | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/friio-fe.c b/drivers/media/dvb/dvb-usb/friio-fe.c new file mode 100644 index 000000000000..c4dfe25cf60d --- /dev/null +++ b/drivers/media/dvb/dvb-usb/friio-fe.c @@ -0,0 +1,483 @@ +/* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver. + * + * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp> + * + * This module is based off the the gl861 and vp702x modules. + * + * 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, version 2. + * + * see Documentation/dvb/README.dvb-usb for more information + */ +#include <linux/init.h> +#include <linux/string.h> +#include <linux/slab.h> + +#include "friio.h" + +struct jdvbt90502_state { + struct i2c_adapter *i2c; + struct dvb_frontend frontend; + struct jdvbt90502_config config; +}; + +/* NOTE: TC90502 has 16bit register-address? */ +/* register 0x0100 is used for reading PLL status, so reg is u16 here */ +static int jdvbt90502_reg_read(struct jdvbt90502_state *state, + const u16 reg, u8 *buf, const size_t count) +{ + int ret; + u8 wbuf[3]; + struct i2c_msg msg[2]; + + wbuf[0] = reg & 0xFF; + wbuf[1] = 0; + wbuf[2] = reg >> 8; + + msg[0].addr = state->config.demod_address; + msg[0].flags = 0; + msg[0].buf = wbuf; + msg[0].len = sizeof(wbuf); + + msg[1].addr = msg[0].addr; + msg[1].flags = I2C_M_RD; + msg[1].buf = buf; + msg[1].len = count; + + ret = i2c_transfer(state->i2c, msg, 2); + if (ret != 2) { + deb_fe(" reg read failed.\n"); + return -EREMOTEIO; + } + return 0; +} + +/* currently 16bit register-address is not used, so reg is u8 here */ +static int jdvbt90502_single_reg_write(struct jdvbt90502_state *state, + const u8 reg, const u8 val) +{ + struct i2c_msg msg; + u8 wbuf[2]; + + wbuf[0] = reg; + wbuf[1] = val; + + msg.addr = state->config.demod_address; + msg.flags = 0; + msg.buf = wbuf; + msg.len = sizeof(wbuf); + + if (i2c_transfer(state->i2c, &msg, 1) != 1) { + deb_fe(" reg write failed."); + return -EREMOTEIO; + } + return 0; +} + +static int _jdvbt90502_write(struct dvb_frontend *fe, u8 *buf, int len) +{ + struct jdvbt90502_state *state = fe->demodulator_priv; + int err, i; + for (i = 0; i < len - 1; i++) { + err = jdvbt90502_single_reg_write(state, + buf[0] + i, buf[i + 1]); + if (err) + return err; + } + + return 0; +} + +/* read pll status byte via the demodulator's I2C register */ +/* note: Win box reads it by 8B block at the I2C addr 0x30 from reg:0x80 */ +static int jdvbt90502_pll_read(struct jdvbt90502_state *state, u8 *result) +{ + int ret; + + /* +1 for reading */ + u8 pll_addr_byte = (state->config.pll_address << 1) + 1; + + *result = 0; + + ret = jdvbt90502_single_reg_write(state, JDVBT90502_2ND_I2C_REG, + pll_addr_byte); + if (ret) + goto error; + + ret = jdvbt90502_reg_read(state, 0x0100, result, 1); + if (ret) + goto error; + + deb_fe("PLL read val:%02x\n", *result); + return 0; + +error: + deb_fe("%s:ret == %d\n", __func__, ret); + return -EREMOTEIO; +} + + +/* set pll frequency via the demodulator's I2C register */ +static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq) +{ + int ret; + int retry; + u8 res1; + u8 res2[9]; + + u8 pll_freq_cmd[PLL_CMD_LEN]; + u8 pll_agc_cmd[PLL_CMD_LEN]; + struct i2c_msg msg[2]; + u32 f; + + deb_fe("%s: freq=%d, step=%d\n", __func__, freq, + state->frontend.ops.info.frequency_stepsize); + /* freq -> oscilator frequency conversion. */ + /* freq: 473,000,000 + n*6,000,000 (no 1/7MHz shift to center freq) */ + /* add 400[1/7 MHZ] = 57.142857MHz. 57MHz for the IF, */ + /* 1/7MHz for center freq shift */ + f = freq / state->frontend.ops.info.frequency_stepsize; + f += 400; + pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */ + pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1; + pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F; + pll_freq_cmd[DIVIDER_BYTE2] = f & 0xFF; + pll_freq_cmd[CONTROL_BYTE] = 0xB2; /* ref.divider:28, 4MHz/28=1/7MHz */ + pll_freq_cmd[BANDSWITCH_BYTE] = 0x08; /* UHF band */ + + msg[0].addr = state->config.demod_address; + msg[0].flags = 0; + msg[0].buf = pll_freq_cmd; + msg[0].len = sizeof(pll_freq_cmd); + + ret = i2c_transfer(state->i2c, &msg[0], 1); + if (ret != 1) + goto error; + + udelay(50); + + pll_agc_cmd[DEMOD_REDIRECT_REG] = pll_freq_cmd[DEMOD_REDIRECT_REG]; + pll_agc_cmd[ADDRESS_BYTE] = pll_freq_cmd[ADDRESS_BYTE]; + pll_agc_cmd[DIVIDER_BYTE1] = pll_freq_cmd[DIVIDER_BYTE1]; + pll_agc_cmd[DIVIDER_BYTE2] = pll_freq_cmd[DIVIDER_BYTE2]; + pll_agc_cmd[CONTROL_BYTE] = 0x9A; /* AGC_CTRL instead of BANDSWITCH */ + pll_agc_cmd[AGC_CTRL_BYTE] = 0x50; + /* AGC Time Constant 2s, AGC take-over point:103dBuV(lowest) */ + + msg[1].addr = msg[0].addr; + msg[1].flags = 0; + msg[1].buf = pll_agc_cmd; + msg[1].len = sizeof(pll_agc_cmd); + + ret = i2c_transfer(state->i2c, &msg[1], 1); + if (ret != 1) + goto error; + + /* I don't know what these cmds are for, */ + /* but the USB log on a windows box contains them */ + ret = jdvbt90502_single_reg_write(state, 0x01, 0x40); + ret |= jdvbt90502_single_reg_write(state, 0x01, 0x00); + if (ret) + goto error; + udelay(100); + + /* wait for the demod to be ready? */ +#define RETRY_COUNT 5 + for (retry = 0; retry < RETRY_COUNT; retry++) { + ret = jdvbt90502_reg_read(state, 0x0096, &res1, 1); + if (ret) + goto error; + /* if (res1 != 0x00) goto error; */ + ret = jdvbt90502_reg_read(state, 0x00B0, res2, sizeof(res2)); + if (ret) + goto error; + if (res2[0] >= 0xA7) + break; + msleep(100); + } + if (retry >= RETRY_COUNT) { + deb_fe("%s: FE does not get ready after freq setting.\n", + __func__); + return -EREMOTEIO; + } + + return 0; +error: + deb_fe("%s:ret == %d\n", __func__, ret); + return -EREMOTEIO; +} + +static int jdvbt90502_read_status(struct dvb_frontend *fe, fe_status_t *state) +{ + u8 result; + int ret; + + *state = FE_HAS_SIGNAL; + + ret = jdvbt90502_pll_read(fe->demodulator_priv, &result); + if (ret) { + deb_fe("%s:ret == %d\n", __func__, ret); + return -EREMOTEIO; + } + + *state = FE_HAS_SIGNAL + | FE_HAS_CARRIER + | FE_HAS_VITERBI + | FE_HAS_SYNC; + + if (result & PLL_STATUS_LOCKED) + *state |= FE_HAS_LOCK; + + return 0; +} + +static int jdvbt90502_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + *ber = 0; + return 0; +} + +static int jdvbt90502_read_signal_strength(struct dvb_frontend *fe, + u16 *strength) +{ + int ret; + u8 rbuf[37]; + + *strength = 0; + + /* status register (incl. signal strength) : 0x89 */ + /* TODO: read just the necessary registers [0x8B..0x8D]? */ + ret = jdvbt90502_reg_read(fe->demodulator_priv, 0x0089, + rbuf, sizeof(rbuf)); + + if (ret) { + deb_fe("%s:ret == %d\n", __func__, ret); + return -EREMOTEIO; + } + + /* signal_strength: rbuf[2-4] (24bit BE), use lower 16bit for now. */ + *strength = (rbuf[3] << 8) + rbuf[4]; + if (rbuf[2]) + *strength = 0xffff; + + return 0; +} + +static int jdvbt90502_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + *snr = 0x0101; + return 0; +} + +static int jdvbt90502_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + *ucblocks = 0; + return 0; +} + +static int jdvbt90502_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *fs) +{ + fs->min_delay_ms = 500; + fs->step_size = 0; + fs->max_drift = 0; + + return 0; +} + +static int jdvbt90502_get_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + p->inversion = INVERSION_AUTO; + p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; + p->u.ofdm.code_rate_HP = FEC_AUTO; + p->u.ofdm.code_rate_LP = FEC_AUTO; + p->u.ofdm.constellation = QAM_64; + p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO; + p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO; + p->u.ofdm.hierarchy_information = HIERARCHY_AUTO; + return 0; +} + +static int jdvbt90502_set_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + /** + * NOTE: ignore all the paramters except frequency. + * others should be fixed to the proper value for ISDB-T, + * but don't check here. + */ + + struct jdvbt90502_state *state = fe->demodulator_priv; + int ret; + + deb_fe("%s: Freq:%d\n", __func__, p->frequency); + + ret = jdvbt90502_pll_set_freq(state, p->frequency); + if (ret) { + deb_fe("%s:ret == %d\n", __func__, ret); + return -EREMOTEIO; + } + + return 0; +} + +static int jdvbt90502_sleep(struct dvb_frontend *fe) +{ + deb_fe("%s called.\n", __func__); + return 0; +} + + +/** + * (reg, val) commad list to initialize this module. + * captured on a Windows box. + */ +static u8 init_code[][2] = { + {0x01, 0x40}, + {0x04, 0x38}, + {0x05, 0x40}, + {0x07, 0x40}, + {0x0F, 0x4F}, + {0x11, 0x21}, + {0x12, 0x0B}, + {0x13, 0x2F}, + {0x14, 0x31}, + {0x16, 0x02}, + {0x21, 0xC4}, + {0x22, 0x20}, + {0x2C, 0x79}, + {0x2D, 0x34}, + {0x2F, 0x00}, + {0x30, 0x28}, + {0x31, 0x31}, + {0x32, 0xDF}, + {0x38, 0x01}, + {0x39, 0x78}, + {0x3B, 0x33}, + {0x3C, 0x33}, + {0x48, 0x90}, + {0x51, 0x68}, + {0x5E, 0x38}, + {0x71, 0x00}, + {0x72, 0x08}, + {0x77, 0x00}, + {0xC0, 0x21}, + {0xC1, 0x10}, + {0xE4, 0x1A}, + {0xEA, 0x1F}, + {0x77, 0x00}, + {0x71, 0x00}, + {0x71, 0x00}, + {0x76, 0x0C}, +}; + +const static int init_code_len = sizeof(init_code) / sizeof(u8[2]); + +static int jdvbt90502_init(struct dvb_frontend *fe) +{ + int i = -1; + int ret; + struct i2c_msg msg; + + struct jdvbt90502_state *state = fe->demodulator_priv; + + deb_fe("%s called.\n", __func__); + + msg.addr = state->config.demod_address; + msg.flags = 0; + msg.len = 2; + for (i = 0; i < init_code_len; i++) { + msg.buf = init_code[i]; + ret = i2c_transfer(state->i2c, &msg, 1); + if (ret != 1) + goto error; + } + msleep(100); + + return 0; + +error: + deb_fe("%s: init_code[%d] failed. ret==%d\n", __func__, i, ret); + return -EREMOTEIO; +} + + +static void jdvbt90502_release(struct dvb_frontend *fe) +{ + struct jdvbt90502_state *state = fe->demodulator_priv; + kfree(state); +} + + +static struct dvb_frontend_ops jdvbt90502_ops; + +struct dvb_frontend *jdvbt90502_attach(struct dvb_usb_device *d) +{ + struct jdvbt90502_state *state = NULL; + + deb_info("%s called.\n", __func__); + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct jdvbt90502_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->i2c = &d->i2c_adap; + memcpy(&state->config, &friio_fe_config, sizeof(friio_fe_config)); + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &jdvbt90502_ops, + sizeof(jdvbt90502_ops)); + state->frontend.demodulator_priv = state; + + if (jdvbt90502_init(&state->frontend) < 0) + goto error; + + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static struct dvb_frontend_ops jdvbt90502_ops = { + + .info = { + .name = "Comtech JDVBT90502 ISDB-T", + .type = FE_OFDM, + .frequency_min = 473000000, /* UHF 13ch, center */ + .frequency_max = 767142857, /* UHF 62ch, center */ + .frequency_stepsize = JDVBT90502_PLL_CLK / + JDVBT90502_PLL_DIVIDER, + .frequency_tolerance = 0, + + /* NOTE: this driver ignores all parameters but frequency. */ + .caps = FE_CAN_INVERSION_AUTO | + 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 = jdvbt90502_release, + + .init = jdvbt90502_init, + .sleep = jdvbt90502_sleep, + .write = _jdvbt90502_write, + + .set_frontend = jdvbt90502_set_frontend, + .get_frontend = jdvbt90502_get_frontend, + .get_tune_settings = jdvbt90502_get_tune_settings, + + .read_status = jdvbt90502_read_status, + .read_ber = jdvbt90502_read_ber, + .read_signal_strength = jdvbt90502_read_signal_strength, + .read_snr = jdvbt90502_read_snr, + .read_ucblocks = jdvbt90502_read_ucblocks, +}; 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