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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/media/dvb/frontends/cx22702.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/media/dvb/frontends/cx22702.c')
-rw-r--r-- | drivers/media/dvb/frontends/cx22702.c | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/cx22702.c b/drivers/media/dvb/frontends/cx22702.c new file mode 100644 index 0000000..1930b51 --- /dev/null +++ b/drivers/media/dvb/frontends/cx22702.c @@ -0,0 +1,519 @@ +/* + 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 <steve@toth.demon.co.uk> + + 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; + + struct dvb_frontend_ops ops; + + /* configuration settings */ + const struct cx22702_config* config; + + struct dvb_frontend frontend; + + /* previous uncorrected block counter */ + u8 prevUCBlocks; +}; + +static int debug = 0; +#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, + 0xf8, 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", + __FUNCTION__, 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", __FUNCTION__, 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; +} + +/* 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 = (struct cx22702_state*) fe->demodulator_priv; + + /* set PLL */ + cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) &0xfe); + state->config->pll_set(fe, p); + cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) | 1); + + /* 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",__FUNCTION__); + 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 */ + printk("%s: Autodetecting\n",__FUNCTION__); + 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",__FUNCTION__); + 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",__FUNCTION__); + 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",__FUNCTION__); + 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",__FUNCTION__); + 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",__FUNCTION__); + 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",__FUNCTION__); + 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 = (struct cx22702_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]); + + + /* init PLL */ + if (state->config->pll_init) { + cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) &0xfe); + state->config->pll_init(fe); + cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) | 1); + } + + return 0; +} + +static int cx22702_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct cx22702_state* state = (struct cx22702_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" + ,__FUNCTION__,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 = (struct cx22702_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 = (struct cx22702_state*) fe->demodulator_priv; + + *signal_strength = cx22702_readreg (state, 0x23); + + return 0; +} + +static int cx22702_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct cx22702_state* state = (struct cx22702_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 = (struct cx22702_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 = (struct cx22702_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 void cx22702_release(struct dvb_frontend* fe) +{ + struct cx22702_state* state = (struct cx22702_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 = (struct cx22702_state*) kmalloc(sizeof(struct cx22702_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + memcpy(&state->ops, &cx22702_ops, sizeof(struct dvb_frontend_ops)); + state->prevUCBlocks = 0; + + /* check if the demod is there */ + if (cx22702_readreg(state, 0x1f) != 0x3) goto error; + + /* create dvb_frontend */ + state->frontend.ops = &state->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, + + .set_frontend = cx22702_set_tps, + .get_frontend = cx22702_get_frontend, + + .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); |