diff options
Diffstat (limited to 'drivers/media/dvb/frontends/cx22702.c')
| -rw-r--r-- | drivers/media/dvb/frontends/cx22702.c | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/drivers/media/dvb/frontends/cx22702.c b/drivers/media/dvb/frontends/cx22702.c deleted file mode 100644 index cc1db4e371c..00000000000 --- a/drivers/media/dvb/frontends/cx22702.c +++ /dev/null @@ -1,535 +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@hauppauge.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 <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; -#define dprintk if (debug) printk - -/* Register values to initialise the demod */ -static u8 init_tab [] = { - 0x00, 0x00, /* Stop aquisition */ - 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 (ret != 1) - printk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n", - __func__, reg, data, ret); - - return (ret != 1) ? -1 : 0; -} - -static u8 cx22702_readreg (struct cx22702_state* state, u8 reg) -{ - int ret; - u8 b0 [] = { reg }; - u8 b1 [] = { 0 }; - - struct i2c_msg msg [] = { - { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 }, - { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } }; - - ret = i2c_transfer(state->i2c, msg, 2); - - if (ret != 2) - printk("%s: readreg error (ret == %i)\n", __func__, ret); - - return b1[0]; -} - -static int cx22702_set_inversion (struct cx22702_state *state, int inversion) -{ - u8 val; - - switch (inversion) { - - case INVERSION_AUTO: - return -EOPNOTSUPP; - - case INVERSION_ON: - val = cx22702_readreg (state, 0x0C); - return cx22702_writereg (state, 0x0C, val | 0x01); - - case INVERSION_OFF: - val = cx22702_readreg (state, 0x0C); - return cx22702_writereg (state, 0x0C, val & 0xfe); - - default: - return -EINVAL; - - } - -} - -/* Retrieve the demod settings */ -static int cx22702_get_tps (struct cx22702_state *state, struct dvb_ofdm_parameters *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->constellation = QPSK; break; - case 1: p->constellation = QAM_16; break; - case 2: p->constellation = QAM_64; break; - } - switch( val&0x07 ) { - case 0: p->hierarchy_information = HIERARCHY_NONE; break; - case 1: p->hierarchy_information = HIERARCHY_1; break; - case 2: p->hierarchy_information = HIERARCHY_2; break; - case 3: p->hierarchy_information = 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; - dprintk ("%s(%d)\n", __func__, enable); - if (enable) - return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) & 0xfe); - else - return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) | 1); -} - -/* Talk to the demod, set the FEC, GUARD, QAM settings etc */ -static int cx22702_set_tps (struct dvb_frontend* fe, struct dvb_frontend_parameters *p) -{ - u8 val; - struct cx22702_state* state = fe->demodulator_priv; - - 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); - } - - /* set inversion */ - cx22702_set_inversion (state, p->inversion); - - /* set bandwidth */ - switch(p->u.ofdm.bandwidth) { - case BANDWIDTH_6_MHZ: - cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xcf) | 0x20 ); - break; - case BANDWIDTH_7_MHZ: - cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xcf) | 0x10 ); - break; - case BANDWIDTH_8_MHZ: - cx22702_writereg(state, 0x0C, cx22702_readreg(state, 0x0C) &0xcf ); - break; - default: - dprintk ("%s: invalid bandwidth\n",__func__); - return -EINVAL; - } - - - p->u.ofdm.code_rate_LP = FEC_AUTO; //temp hack as manual not working - - /* use auto configuration? */ - if((p->u.ofdm.hierarchy_information==HIERARCHY_AUTO) || - (p->u.ofdm.constellation==QAM_AUTO) || - (p->u.ofdm.code_rate_HP==FEC_AUTO) || - (p->u.ofdm.code_rate_LP==FEC_AUTO) || - (p->u.ofdm.guard_interval==GUARD_INTERVAL_AUTO) || - (p->u.ofdm.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 aquisition */ - dprintk("%s: Autodetecting\n",__func__); - return 0; - } - - /* manually programmed values */ - val=0; - switch(p->u.ofdm.constellation) { - case QPSK: val = (val&0xe7); break; - case QAM_16: val = (val&0xe7)|0x08; break; - case QAM_64: val = (val&0xe7)|0x10; break; - default: - dprintk ("%s: invalid constellation\n",__func__); - return -EINVAL; - } - switch(p->u.ofdm.hierarchy_information) { - case HIERARCHY_NONE: val = (val&0xf8); break; - case HIERARCHY_1: val = (val&0xf8)|1; break; - case HIERARCHY_2: val = (val&0xf8)|2; break; - case HIERARCHY_4: val = (val&0xf8)|3; break; - default: - dprintk ("%s: invalid hierarchy\n",__func__); - return -EINVAL; - } - cx22702_writereg (state, 0x06, val); - - val=0; - switch(p->u.ofdm.code_rate_HP) { - case FEC_NONE: - case FEC_1_2: val = (val&0xc7); break; - case FEC_2_3: val = (val&0xc7)|0x08; break; - case FEC_3_4: val = (val&0xc7)|0x10; break; - case FEC_5_6: val = (val&0xc7)|0x18; break; - case FEC_7_8: val = (val&0xc7)|0x20; break; - default: - dprintk ("%s: invalid code_rate_HP\n",__func__); - return -EINVAL; - } - switch(p->u.ofdm.code_rate_LP) { - case FEC_NONE: - case FEC_1_2: val = (val&0xf8); break; - case FEC_2_3: val = (val&0xf8)|1; break; - case FEC_3_4: val = (val&0xf8)|2; break; - case FEC_5_6: val = (val&0xf8)|3; break; - case FEC_7_8: val = (val&0xf8)|4; break; - default: - dprintk ("%s: invalid code_rate_LP\n",__func__); - return -EINVAL; - } - cx22702_writereg (state, 0x07, val); - - val=0; - switch(p->u.ofdm.guard_interval) { - case GUARD_INTERVAL_1_32: val = (val&0xf3); break; - case GUARD_INTERVAL_1_16: val = (val&0xf3)|0x04; break; - case GUARD_INTERVAL_1_8: val = (val&0xf3)|0x08; break; - case GUARD_INTERVAL_1_4: val = (val&0xf3)|0x0c; break; - default: - dprintk ("%s: invalid guard_interval\n",__func__); - return -EINVAL; - } - switch(p->u.ofdm.transmission_mode) { - case TRANSMISSION_MODE_2K: val = (val&0xfc); break; - case TRANSMISSION_MODE_8K: val = (val&0xfc)|1; 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 aquisition */ - 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<sizeof(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; - - u16 rs_ber = 0; - rs_ber = cx22702_readreg (state, 0x23); - *signal_strength = (rs_ber << 8) | rs_ber; - - return 0; -} - -static int cx22702_read_snr(struct dvb_frontend* fe, u16* snr) -{ - struct cx22702_state* state = fe->demodulator_priv; - - u16 rs_ber=0; - 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 dvb_frontend_parameters *p) -{ - struct cx22702_state* state = fe->demodulator_priv; - - u8 reg0C = cx22702_readreg (state, 0x0C); - - p->inversion = reg0C & 0x1 ? INVERSION_ON : INVERSION_OFF; - return cx22702_get_tps (state, &p->u.ofdm); -} - -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 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 = kmalloc(sizeof(struct cx22702_state), GFP_KERNEL); - if (state == NULL) - goto error; - - /* setup the state */ - state->config = config; - state->i2c = i2c; - state->prevUCBlocks = 0; - - /* 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; -} - -static struct dvb_frontend_ops cx22702_ops = { - - .info = { - .name = "Conexant CX22702 DVB-T", - .type = FE_OFDM, - .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_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Enable verbose debug messages"); - -MODULE_DESCRIPTION("Conexant CX22702 DVB-T Demodulator driver"); -MODULE_AUTHOR("Steven Toth"); -MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(cx22702_attach); |