diff options
Diffstat (limited to 'drivers/media/dvb/frontends/cx22702.c')
| -rw-r--r-- | drivers/media/dvb/frontends/cx22702.c | 653 |
1 files changed, 0 insertions, 653 deletions
diff --git a/drivers/media/dvb/frontends/cx22702.c b/drivers/media/dvb/frontends/cx22702.c deleted file mode 100644 index edc8eafc5c09..000000000000 --- a/drivers/media/dvb/frontends/cx22702.c +++ /dev/null @@ -1,653 +0,0 @@ -/* - Conexant 22702 DVB OFDM demodulator driver - - based on: - Alps TDMB7 DVB OFDM demodulator driver - - Copyright (C) 2001-2002 Convergence Integrated Media GmbH - Holger Waechtler <holger@convergence.de> - - Copyright (C) 2004 Steven Toth <stoth@linuxtv.org> - - 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/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include "dvb_frontend.h" -#include "cx22702.h" - -struct cx22702_state { - - struct i2c_adapter *i2c; - - /* configuration settings */ - const struct cx22702_config *config; - - struct dvb_frontend frontend; - - /* previous uncorrected block counter */ - u8 prevUCBlocks; -}; - -static int debug; -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Enable verbose debug messages"); - -#define dprintk if (debug) printk - -/* Register values to initialise the demod */ -static const u8 init_tab[] = { - 0x00, 0x00, /* Stop acquisition */ - 0x0B, 0x06, - 0x09, 0x01, - 0x0D, 0x41, - 0x16, 0x32, - 0x20, 0x0A, - 0x21, 0x17, - 0x24, 0x3e, - 0x26, 0xff, - 0x27, 0x10, - 0x28, 0x00, - 0x29, 0x00, - 0x2a, 0x10, - 0x2b, 0x00, - 0x2c, 0x10, - 0x2d, 0x00, - 0x48, 0xd4, - 0x49, 0x56, - 0x6b, 0x1e, - 0xc8, 0x02, - 0xf9, 0x00, - 0xfa, 0x00, - 0xfb, 0x00, - 0xfc, 0x00, - 0xfd, 0x00, -}; - -static int cx22702_writereg(struct cx22702_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 (unlikely(ret != 1)) { - printk(KERN_ERR - "%s: error (reg == 0x%02x, val == 0x%02x, ret == %i)\n", - __func__, reg, data, ret); - return -1; - } - - return 0; -} - -static u8 cx22702_readreg(struct cx22702_state *state, u8 reg) -{ - int ret; - u8 data; - - struct i2c_msg msg[] = { - { .addr = state->config->demod_address, .flags = 0, - .buf = ®, .len = 1 }, - { .addr = state->config->demod_address, .flags = I2C_M_RD, - .buf = &data, .len = 1 } }; - - ret = i2c_transfer(state->i2c, msg, 2); - - if (unlikely(ret != 2)) { - printk(KERN_ERR "%s: error (reg == 0x%02x, ret == %i)\n", - __func__, reg, ret); - return 0; - } - - return data; -} - -static int cx22702_set_inversion(struct cx22702_state *state, int inversion) -{ - u8 val; - - val = cx22702_readreg(state, 0x0C); - switch (inversion) { - case INVERSION_AUTO: - return -EOPNOTSUPP; - case INVERSION_ON: - val |= 0x01; - break; - case INVERSION_OFF: - val &= 0xfe; - break; - default: - return -EINVAL; - } - return cx22702_writereg(state, 0x0C, val); -} - -/* Retrieve the demod settings */ -static int cx22702_get_tps(struct cx22702_state *state, - struct dtv_frontend_properties *p) -{ - u8 val; - - /* Make sure the TPS regs are valid */ - if (!(cx22702_readreg(state, 0x0A) & 0x20)) - return -EAGAIN; - - val = cx22702_readreg(state, 0x01); - switch ((val & 0x18) >> 3) { - case 0: - p->modulation = QPSK; - break; - case 1: - p->modulation = QAM_16; - break; - case 2: - p->modulation = QAM_64; - break; - } - switch (val & 0x07) { - case 0: - p->hierarchy = HIERARCHY_NONE; - break; - case 1: - p->hierarchy = HIERARCHY_1; - break; - case 2: - p->hierarchy = HIERARCHY_2; - break; - case 3: - p->hierarchy = HIERARCHY_4; - break; - } - - - val = cx22702_readreg(state, 0x02); - switch ((val & 0x38) >> 3) { - case 0: - p->code_rate_HP = FEC_1_2; - break; - case 1: - p->code_rate_HP = FEC_2_3; - break; - case 2: - p->code_rate_HP = FEC_3_4; - break; - case 3: - p->code_rate_HP = FEC_5_6; - break; - case 4: - p->code_rate_HP = FEC_7_8; - break; - } - switch (val & 0x07) { - case 0: - p->code_rate_LP = FEC_1_2; - break; - case 1: - p->code_rate_LP = FEC_2_3; - break; - case 2: - p->code_rate_LP = FEC_3_4; - break; - case 3: - p->code_rate_LP = FEC_5_6; - break; - case 4: - p->code_rate_LP = FEC_7_8; - break; - } - - val = cx22702_readreg(state, 0x03); - switch ((val & 0x0c) >> 2) { - case 0: - p->guard_interval = GUARD_INTERVAL_1_32; - break; - case 1: - p->guard_interval = GUARD_INTERVAL_1_16; - break; - case 2: - p->guard_interval = GUARD_INTERVAL_1_8; - break; - case 3: - p->guard_interval = GUARD_INTERVAL_1_4; - break; - } - switch (val & 0x03) { - case 0: - p->transmission_mode = TRANSMISSION_MODE_2K; - break; - case 1: - p->transmission_mode = TRANSMISSION_MODE_8K; - break; - } - - return 0; -} - -static int cx22702_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) -{ - struct cx22702_state *state = fe->demodulator_priv; - u8 val; - - dprintk("%s(%d)\n", __func__, enable); - val = cx22702_readreg(state, 0x0D); - if (enable) - val &= 0xfe; - else - val |= 0x01; - return cx22702_writereg(state, 0x0D, val); -} - -/* Talk to the demod, set the FEC, GUARD, QAM settings etc */ -static int cx22702_set_tps(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; - u8 val; - struct cx22702_state *state = fe->demodulator_priv; - - if (fe->ops.tuner_ops.set_params) { - fe->ops.tuner_ops.set_params(fe); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 0); - } - - /* set inversion */ - cx22702_set_inversion(state, p->inversion); - - /* set bandwidth */ - val = cx22702_readreg(state, 0x0C) & 0xcf; - switch (p->bandwidth_hz) { - case 6000000: - val |= 0x20; - break; - case 7000000: - val |= 0x10; - break; - case 8000000: - break; - default: - dprintk("%s: invalid bandwidth\n", __func__); - return -EINVAL; - } - cx22702_writereg(state, 0x0C, val); - - p->code_rate_LP = FEC_AUTO; /* temp hack as manual not working */ - - /* use auto configuration? */ - if ((p->hierarchy == HIERARCHY_AUTO) || - (p->modulation == QAM_AUTO) || - (p->code_rate_HP == FEC_AUTO) || - (p->code_rate_LP == FEC_AUTO) || - (p->guard_interval == GUARD_INTERVAL_AUTO) || - (p->transmission_mode == TRANSMISSION_MODE_AUTO)) { - - /* TPS Source - use hardware driven values */ - cx22702_writereg(state, 0x06, 0x10); - cx22702_writereg(state, 0x07, 0x9); - cx22702_writereg(state, 0x08, 0xC1); - cx22702_writereg(state, 0x0B, cx22702_readreg(state, 0x0B) - & 0xfc); - cx22702_writereg(state, 0x0C, - (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40); - cx22702_writereg(state, 0x00, 0x01); /* Begin acquisition */ - dprintk("%s: Autodetecting\n", __func__); - return 0; - } - - /* manually programmed values */ - switch (p->modulation) { /* mask 0x18 */ - case QPSK: - val = 0x00; - break; - case QAM_16: - val = 0x08; - break; - case QAM_64: - val = 0x10; - break; - default: - dprintk("%s: invalid modulation\n", __func__); - return -EINVAL; - } - switch (p->hierarchy) { /* mask 0x07 */ - case HIERARCHY_NONE: - break; - case HIERARCHY_1: - val |= 0x01; - break; - case HIERARCHY_2: - val |= 0x02; - break; - case HIERARCHY_4: - val |= 0x03; - break; - default: - dprintk("%s: invalid hierarchy\n", __func__); - return -EINVAL; - } - cx22702_writereg(state, 0x06, val); - - switch (p->code_rate_HP) { /* mask 0x38 */ - case FEC_NONE: - case FEC_1_2: - val = 0x00; - break; - case FEC_2_3: - val = 0x08; - break; - case FEC_3_4: - val = 0x10; - break; - case FEC_5_6: - val = 0x18; - break; - case FEC_7_8: - val = 0x20; - break; - default: - dprintk("%s: invalid code_rate_HP\n", __func__); - return -EINVAL; - } - switch (p->code_rate_LP) { /* mask 0x07 */ - case FEC_NONE: - case FEC_1_2: - break; - case FEC_2_3: - val |= 0x01; - break; - case FEC_3_4: - val |= 0x02; - break; - case FEC_5_6: - val |= 0x03; - break; - case FEC_7_8: - val |= 0x04; - break; - default: - dprintk("%s: invalid code_rate_LP\n", __func__); - return -EINVAL; - } - cx22702_writereg(state, 0x07, val); - - switch (p->guard_interval) { /* mask 0x0c */ - case GUARD_INTERVAL_1_32: - val = 0x00; - break; - case GUARD_INTERVAL_1_16: - val = 0x04; - break; - case GUARD_INTERVAL_1_8: - val = 0x08; - break; - case GUARD_INTERVAL_1_4: - val = 0x0c; - break; - default: - dprintk("%s: invalid guard_interval\n", __func__); - return -EINVAL; - } - switch (p->transmission_mode) { /* mask 0x03 */ - case TRANSMISSION_MODE_2K: - break; - case TRANSMISSION_MODE_8K: - val |= 0x1; - break; - default: - dprintk("%s: invalid transmission_mode\n", __func__); - return -EINVAL; - } - cx22702_writereg(state, 0x08, val); - cx22702_writereg(state, 0x0B, - (cx22702_readreg(state, 0x0B) & 0xfc) | 0x02); - cx22702_writereg(state, 0x0C, - (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40); - - /* Begin channel acquisition */ - cx22702_writereg(state, 0x00, 0x01); - - return 0; -} - -/* Reset the demod hardware and reset all of the configuration registers - to a default state. */ -static int cx22702_init(struct dvb_frontend *fe) -{ - int i; - struct cx22702_state *state = fe->demodulator_priv; - - cx22702_writereg(state, 0x00, 0x02); - - msleep(10); - - for (i = 0; i < ARRAY_SIZE(init_tab); i += 2) - cx22702_writereg(state, init_tab[i], init_tab[i + 1]); - - cx22702_writereg(state, 0xf8, (state->config->output_mode << 1) - & 0x02); - - cx22702_i2c_gate_ctrl(fe, 0); - - return 0; -} - -static int cx22702_read_status(struct dvb_frontend *fe, fe_status_t *status) -{ - struct cx22702_state *state = fe->demodulator_priv; - u8 reg0A; - u8 reg23; - - *status = 0; - - reg0A = cx22702_readreg(state, 0x0A); - reg23 = cx22702_readreg(state, 0x23); - - dprintk("%s: status demod=0x%02x agc=0x%02x\n" - , __func__, reg0A, reg23); - - if (reg0A & 0x10) { - *status |= FE_HAS_LOCK; - *status |= FE_HAS_VITERBI; - *status |= FE_HAS_SYNC; - } - - if (reg0A & 0x20) - *status |= FE_HAS_CARRIER; - - if (reg23 < 0xf0) - *status |= FE_HAS_SIGNAL; - - return 0; -} - -static int cx22702_read_ber(struct dvb_frontend *fe, u32 *ber) -{ - struct cx22702_state *state = fe->demodulator_priv; - - if (cx22702_readreg(state, 0xE4) & 0x02) { - /* Realtime statistics */ - *ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7 - | (cx22702_readreg(state, 0xDF) & 0x7F); - } else { - /* Averagtine statistics */ - *ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7 - | cx22702_readreg(state, 0xDF); - } - - return 0; -} - -static int cx22702_read_signal_strength(struct dvb_frontend *fe, - u16 *signal_strength) -{ - struct cx22702_state *state = fe->demodulator_priv; - u8 reg23; - - /* - * Experience suggests that the strength signal register works as - * follows: - * - In the absence of signal, value is 0xff. - * - In the presence of a weak signal, bit 7 is set, not sure what - * the lower 7 bits mean. - * - In the presence of a strong signal, the register holds a 7-bit - * value (bit 7 is cleared), with greater values standing for - * weaker signals. - */ - reg23 = cx22702_readreg(state, 0x23); - if (reg23 & 0x80) { - *signal_strength = 0; - } else { - reg23 = ~reg23 & 0x7f; - /* Scale to 16 bit */ - *signal_strength = (reg23 << 9) | (reg23 << 2) | (reg23 >> 5); - } - - return 0; -} - -static int cx22702_read_snr(struct dvb_frontend *fe, u16 *snr) -{ - struct cx22702_state *state = fe->demodulator_priv; - - u16 rs_ber; - if (cx22702_readreg(state, 0xE4) & 0x02) { - /* Realtime statistics */ - rs_ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7 - | (cx22702_readreg(state, 0xDF) & 0x7F); - } else { - /* Averagine statistics */ - rs_ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 8 - | cx22702_readreg(state, 0xDF); - } - *snr = ~rs_ber; - - return 0; -} - -static int cx22702_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) -{ - struct cx22702_state *state = fe->demodulator_priv; - - u8 _ucblocks; - - /* RS Uncorrectable Packet Count then reset */ - _ucblocks = cx22702_readreg(state, 0xE3); - if (state->prevUCBlocks < _ucblocks) - *ucblocks = (_ucblocks - state->prevUCBlocks); - else - *ucblocks = state->prevUCBlocks - _ucblocks; - state->prevUCBlocks = _ucblocks; - - return 0; -} - -static int cx22702_get_frontend(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - struct cx22702_state *state = fe->demodulator_priv; - - u8 reg0C = cx22702_readreg(state, 0x0C); - - c->inversion = reg0C & 0x1 ? INVERSION_ON : INVERSION_OFF; - return cx22702_get_tps(state, c); -} - -static int cx22702_get_tune_settings(struct dvb_frontend *fe, - struct dvb_frontend_tune_settings *tune) -{ - tune->min_delay_ms = 1000; - return 0; -} - -static void cx22702_release(struct dvb_frontend *fe) -{ - struct cx22702_state *state = fe->demodulator_priv; - kfree(state); -} - -static const struct dvb_frontend_ops cx22702_ops; - -struct dvb_frontend *cx22702_attach(const struct cx22702_config *config, - struct i2c_adapter *i2c) -{ - struct cx22702_state *state = NULL; - - /* allocate memory for the internal state */ - state = kzalloc(sizeof(struct cx22702_state), GFP_KERNEL); - if (state == NULL) - goto error; - - /* setup the state */ - state->config = config; - state->i2c = i2c; - - /* check if the demod is there */ - if (cx22702_readreg(state, 0x1f) != 0x3) - goto error; - - /* create dvb_frontend */ - memcpy(&state->frontend.ops, &cx22702_ops, - sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; - -error: - kfree(state); - return NULL; -} -EXPORT_SYMBOL(cx22702_attach); - -static const struct dvb_frontend_ops cx22702_ops = { - .delsys = { SYS_DVBT }, - .info = { - .name = "Conexant CX22702 DVB-T", - .frequency_min = 177000000, - .frequency_max = 858000000, - .frequency_stepsize = 166666, - .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_FEC_AUTO | - FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | - FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | - FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER - }, - - .release = cx22702_release, - - .init = cx22702_init, - .i2c_gate_ctrl = cx22702_i2c_gate_ctrl, - - .set_frontend = cx22702_set_tps, - .get_frontend = cx22702_get_frontend, - .get_tune_settings = cx22702_get_tune_settings, - - .read_status = cx22702_read_status, - .read_ber = cx22702_read_ber, - .read_signal_strength = cx22702_read_signal_strength, - .read_snr = cx22702_read_snr, - .read_ucblocks = cx22702_read_ucblocks, -}; - -MODULE_DESCRIPTION("Conexant CX22702 DVB-T Demodulator driver"); -MODULE_AUTHOR("Steven Toth"); -MODULE_LICENSE("GPL"); |