diff options
Diffstat (limited to 'drivers/media/dvb/frontends/atbm8830.c')
| -rw-r--r-- | drivers/media/dvb/frontends/atbm8830.c | 508 |
1 files changed, 0 insertions, 508 deletions
diff --git a/drivers/media/dvb/frontends/atbm8830.c b/drivers/media/dvb/frontends/atbm8830.c deleted file mode 100644 index 4e11dc4b1335..000000000000 --- a/drivers/media/dvb/frontends/atbm8830.c +++ /dev/null @@ -1,508 +0,0 @@ -/* - * Support for AltoBeam GB20600 (a.k.a DMB-TH) demodulator - * ATBM8830, ATBM8831 - * - * Copyright (C) 2009 David T.L. Wong <davidtlwong@gmail.com> - * - * 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 <asm/div64.h> -#include "dvb_frontend.h" - -#include "atbm8830.h" -#include "atbm8830_priv.h" - -#define dprintk(args...) \ - do { \ - if (debug) \ - printk(KERN_DEBUG "atbm8830: " args); \ - } while (0) - -static int debug; - -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -static int atbm8830_write_reg(struct atbm_state *priv, u16 reg, u8 data) -{ - int ret = 0; - u8 dev_addr; - u8 buf1[] = { reg >> 8, reg & 0xFF }; - u8 buf2[] = { data }; - struct i2c_msg msg1 = { .flags = 0, .buf = buf1, .len = 2 }; - struct i2c_msg msg2 = { .flags = 0, .buf = buf2, .len = 1 }; - - dev_addr = priv->config->demod_address; - msg1.addr = dev_addr; - msg2.addr = dev_addr; - - if (debug >= 2) - dprintk("%s: reg=0x%04X, data=0x%02X\n", __func__, reg, data); - - ret = i2c_transfer(priv->i2c, &msg1, 1); - if (ret != 1) - return -EIO; - - ret = i2c_transfer(priv->i2c, &msg2, 1); - return (ret != 1) ? -EIO : 0; -} - -static int atbm8830_read_reg(struct atbm_state *priv, u16 reg, u8 *p_data) -{ - int ret; - u8 dev_addr; - - u8 buf1[] = { reg >> 8, reg & 0xFF }; - u8 buf2[] = { 0 }; - struct i2c_msg msg1 = { .flags = 0, .buf = buf1, .len = 2 }; - struct i2c_msg msg2 = { .flags = I2C_M_RD, .buf = buf2, .len = 1 }; - - dev_addr = priv->config->demod_address; - msg1.addr = dev_addr; - msg2.addr = dev_addr; - - ret = i2c_transfer(priv->i2c, &msg1, 1); - if (ret != 1) { - dprintk("%s: error reg=0x%04x, ret=%i\n", __func__, reg, ret); - return -EIO; - } - - ret = i2c_transfer(priv->i2c, &msg2, 1); - if (ret != 1) - return -EIO; - - *p_data = buf2[0]; - if (debug >= 2) - dprintk("%s: reg=0x%04X, data=0x%02X\n", - __func__, reg, buf2[0]); - - return 0; -} - -/* Lock register latch so that multi-register read is atomic */ -static inline int atbm8830_reglatch_lock(struct atbm_state *priv, int lock) -{ - return atbm8830_write_reg(priv, REG_READ_LATCH, lock ? 1 : 0); -} - -static int set_osc_freq(struct atbm_state *priv, u32 freq /*in kHz*/) -{ - u32 val; - u64 t; - - /* 0x100000 * freq / 30.4MHz */ - t = (u64)0x100000 * freq; - do_div(t, 30400); - val = t; - - atbm8830_write_reg(priv, REG_OSC_CLK, val); - atbm8830_write_reg(priv, REG_OSC_CLK + 1, val >> 8); - atbm8830_write_reg(priv, REG_OSC_CLK + 2, val >> 16); - - return 0; -} - -static int set_if_freq(struct atbm_state *priv, u32 freq /*in kHz*/) -{ - - u32 fs = priv->config->osc_clk_freq; - u64 t; - u32 val; - u8 dat; - - if (freq != 0) { - /* 2 * PI * (freq - fs) / fs * (2 ^ 22) */ - t = (u64) 2 * 31416 * (freq - fs); - t <<= 22; - do_div(t, fs); - do_div(t, 1000); - val = t; - - atbm8830_write_reg(priv, REG_TUNER_BASEBAND, 1); - atbm8830_write_reg(priv, REG_IF_FREQ, val); - atbm8830_write_reg(priv, REG_IF_FREQ+1, val >> 8); - atbm8830_write_reg(priv, REG_IF_FREQ+2, val >> 16); - - atbm8830_read_reg(priv, REG_ADC_CONFIG, &dat); - dat &= 0xFC; - atbm8830_write_reg(priv, REG_ADC_CONFIG, dat); - } else { - /* Zero IF */ - atbm8830_write_reg(priv, REG_TUNER_BASEBAND, 0); - - atbm8830_read_reg(priv, REG_ADC_CONFIG, &dat); - dat &= 0xFC; - dat |= 0x02; - atbm8830_write_reg(priv, REG_ADC_CONFIG, dat); - - if (priv->config->zif_swap_iq) - atbm8830_write_reg(priv, REG_SWAP_I_Q, 0x03); - else - atbm8830_write_reg(priv, REG_SWAP_I_Q, 0x01); - } - - return 0; -} - -static int is_locked(struct atbm_state *priv, u8 *locked) -{ - u8 status; - - atbm8830_read_reg(priv, REG_LOCK_STATUS, &status); - - if (locked != NULL) - *locked = (status == 1); - return 0; -} - -static int set_agc_config(struct atbm_state *priv, - u8 min, u8 max, u8 hold_loop) -{ - /* no effect if both min and max are zero */ - if (!min && !max) - return 0; - - atbm8830_write_reg(priv, REG_AGC_MIN, min); - atbm8830_write_reg(priv, REG_AGC_MAX, max); - atbm8830_write_reg(priv, REG_AGC_HOLD_LOOP, hold_loop); - - return 0; -} - -static int set_static_channel_mode(struct atbm_state *priv) -{ - int i; - - for (i = 0; i < 5; i++) - atbm8830_write_reg(priv, 0x099B + i, 0x08); - - atbm8830_write_reg(priv, 0x095B, 0x7F); - atbm8830_write_reg(priv, 0x09CB, 0x01); - atbm8830_write_reg(priv, 0x09CC, 0x7F); - atbm8830_write_reg(priv, 0x09CD, 0x7F); - atbm8830_write_reg(priv, 0x0E01, 0x20); - - /* For single carrier */ - atbm8830_write_reg(priv, 0x0B03, 0x0A); - atbm8830_write_reg(priv, 0x0935, 0x10); - atbm8830_write_reg(priv, 0x0936, 0x08); - atbm8830_write_reg(priv, 0x093E, 0x08); - atbm8830_write_reg(priv, 0x096E, 0x06); - - /* frame_count_max0 */ - atbm8830_write_reg(priv, 0x0B09, 0x00); - /* frame_count_max1 */ - atbm8830_write_reg(priv, 0x0B0A, 0x08); - - return 0; -} - -static int set_ts_config(struct atbm_state *priv) -{ - const struct atbm8830_config *cfg = priv->config; - - /*Set parallel/serial ts mode*/ - atbm8830_write_reg(priv, REG_TS_SERIAL, cfg->serial_ts ? 1 : 0); - atbm8830_write_reg(priv, REG_TS_CLK_MODE, cfg->serial_ts ? 1 : 0); - /*Set ts sampling edge*/ - atbm8830_write_reg(priv, REG_TS_SAMPLE_EDGE, - cfg->ts_sampling_edge ? 1 : 0); - /*Set ts clock freerun*/ - atbm8830_write_reg(priv, REG_TS_CLK_FREERUN, - cfg->ts_clk_gated ? 0 : 1); - - return 0; -} - -static int atbm8830_init(struct dvb_frontend *fe) -{ - struct atbm_state *priv = fe->demodulator_priv; - const struct atbm8830_config *cfg = priv->config; - - /*Set oscillator frequency*/ - set_osc_freq(priv, cfg->osc_clk_freq); - - /*Set IF frequency*/ - set_if_freq(priv, cfg->if_freq); - - /*Set AGC Config*/ - set_agc_config(priv, cfg->agc_min, cfg->agc_max, - cfg->agc_hold_loop); - - /*Set static channel mode*/ - set_static_channel_mode(priv); - - set_ts_config(priv); - /*Turn off DSP reset*/ - atbm8830_write_reg(priv, 0x000A, 0); - - /*SW version test*/ - atbm8830_write_reg(priv, 0x020C, 11); - - /* Run */ - atbm8830_write_reg(priv, REG_DEMOD_RUN, 1); - - return 0; -} - - -static void atbm8830_release(struct dvb_frontend *fe) -{ - struct atbm_state *state = fe->demodulator_priv; - dprintk("%s\n", __func__); - - kfree(state); -} - -static int atbm8830_set_fe(struct dvb_frontend *fe) -{ - struct atbm_state *priv = fe->demodulator_priv; - int i; - u8 locked = 0; - dprintk("%s\n", __func__); - - /* set frequency */ - if (fe->ops.tuner_ops.set_params) { - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - fe->ops.tuner_ops.set_params(fe); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 0); - } - - /* start auto lock */ - for (i = 0; i < 10; i++) { - mdelay(100); - dprintk("Try %d\n", i); - is_locked(priv, &locked); - if (locked != 0) { - dprintk("ATBM8830 locked!\n"); - break; - } - } - - return 0; -} - -static int atbm8830_get_fe(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - dprintk("%s\n", __func__); - - /* TODO: get real readings from device */ - /* inversion status */ - c->inversion = INVERSION_OFF; - - /* bandwidth */ - c->bandwidth_hz = 8000000; - - c->code_rate_HP = FEC_AUTO; - c->code_rate_LP = FEC_AUTO; - - c->modulation = QAM_AUTO; - - /* transmission mode */ - c->transmission_mode = TRANSMISSION_MODE_AUTO; - - /* guard interval */ - c->guard_interval = GUARD_INTERVAL_AUTO; - - /* hierarchy */ - c->hierarchy = HIERARCHY_NONE; - - return 0; -} - -static int atbm8830_get_tune_settings(struct dvb_frontend *fe, - struct dvb_frontend_tune_settings *fesettings) -{ - fesettings->min_delay_ms = 0; - fesettings->step_size = 0; - fesettings->max_drift = 0; - return 0; -} - -static int atbm8830_read_status(struct dvb_frontend *fe, fe_status_t *fe_status) -{ - struct atbm_state *priv = fe->demodulator_priv; - u8 locked = 0; - u8 agc_locked = 0; - - dprintk("%s\n", __func__); - *fe_status = 0; - - is_locked(priv, &locked); - if (locked) { - *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; - } - dprintk("%s: fe_status=0x%x\n", __func__, *fe_status); - - atbm8830_read_reg(priv, REG_AGC_LOCK, &agc_locked); - dprintk("AGC Lock: %d\n", agc_locked); - - return 0; -} - -static int atbm8830_read_ber(struct dvb_frontend *fe, u32 *ber) -{ - struct atbm_state *priv = fe->demodulator_priv; - u32 frame_err; - u8 t; - - dprintk("%s\n", __func__); - - atbm8830_reglatch_lock(priv, 1); - - atbm8830_read_reg(priv, REG_FRAME_ERR_CNT + 1, &t); - frame_err = t & 0x7F; - frame_err <<= 8; - atbm8830_read_reg(priv, REG_FRAME_ERR_CNT, &t); - frame_err |= t; - - atbm8830_reglatch_lock(priv, 0); - - *ber = frame_err * 100 / 32767; - - dprintk("%s: ber=0x%x\n", __func__, *ber); - return 0; -} - -static int atbm8830_read_signal_strength(struct dvb_frontend *fe, u16 *signal) -{ - struct atbm_state *priv = fe->demodulator_priv; - u32 pwm; - u8 t; - - dprintk("%s\n", __func__); - atbm8830_reglatch_lock(priv, 1); - - atbm8830_read_reg(priv, REG_AGC_PWM_VAL + 1, &t); - pwm = t & 0x03; - pwm <<= 8; - atbm8830_read_reg(priv, REG_AGC_PWM_VAL, &t); - pwm |= t; - - atbm8830_reglatch_lock(priv, 0); - - dprintk("AGC PWM = 0x%02X\n", pwm); - pwm = 0x400 - pwm; - - *signal = pwm * 0x10000 / 0x400; - - return 0; -} - -static int atbm8830_read_snr(struct dvb_frontend *fe, u16 *snr) -{ - dprintk("%s\n", __func__); - *snr = 0; - return 0; -} - -static int atbm8830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) -{ - dprintk("%s\n", __func__); - *ucblocks = 0; - return 0; -} - -static int atbm8830_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) -{ - struct atbm_state *priv = fe->demodulator_priv; - - return atbm8830_write_reg(priv, REG_I2C_GATE, enable ? 1 : 0); -} - -static struct dvb_frontend_ops atbm8830_ops = { - .delsys = { SYS_DTMB }, - .info = { - .name = "AltoBeam ATBM8830/8831 DMB-TH", - .frequency_min = 474000000, - .frequency_max = 858000000, - .frequency_stepsize = 10000, - .caps = - FE_CAN_FEC_AUTO | - FE_CAN_QAM_AUTO | - FE_CAN_TRANSMISSION_MODE_AUTO | - FE_CAN_GUARD_INTERVAL_AUTO - }, - - .release = atbm8830_release, - - .init = atbm8830_init, - .sleep = NULL, - .write = NULL, - .i2c_gate_ctrl = atbm8830_i2c_gate_ctrl, - - .set_frontend = atbm8830_set_fe, - .get_frontend = atbm8830_get_fe, - .get_tune_settings = atbm8830_get_tune_settings, - - .read_status = atbm8830_read_status, - .read_ber = atbm8830_read_ber, - .read_signal_strength = atbm8830_read_signal_strength, - .read_snr = atbm8830_read_snr, - .read_ucblocks = atbm8830_read_ucblocks, -}; - -struct dvb_frontend *atbm8830_attach(const struct atbm8830_config *config, - struct i2c_adapter *i2c) -{ - struct atbm_state *priv = NULL; - u8 data = 0; - - dprintk("%s()\n", __func__); - - if (config == NULL || i2c == NULL) - return NULL; - - priv = kzalloc(sizeof(struct atbm_state), GFP_KERNEL); - if (priv == NULL) - goto error_out; - - priv->config = config; - priv->i2c = i2c; - - /* check if the demod is there */ - if (atbm8830_read_reg(priv, REG_CHIP_ID, &data) != 0) { - dprintk("%s atbm8830/8831 not found at i2c addr 0x%02X\n", - __func__, priv->config->demod_address); - goto error_out; - } - dprintk("atbm8830 chip id: 0x%02X\n", data); - - memcpy(&priv->frontend.ops, &atbm8830_ops, - sizeof(struct dvb_frontend_ops)); - priv->frontend.demodulator_priv = priv; - - atbm8830_init(&priv->frontend); - - atbm8830_i2c_gate_ctrl(&priv->frontend, 1); - - return &priv->frontend; - -error_out: - dprintk("%s() error_out\n", __func__); - kfree(priv); - return NULL; - -} -EXPORT_SYMBOL(atbm8830_attach); - -MODULE_DESCRIPTION("AltoBeam ATBM8830/8831 GB20600 demodulator driver"); -MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>"); -MODULE_LICENSE("GPL"); |