diff options
author | Steven Toth <stoth@linuxtv.org> | 2008-09-04 04:14:43 (GMT) |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-12 11:37:03 (GMT) |
commit | 0d46748c3f874defbbbf98bcf40c7b18964abbc0 (patch) | |
tree | c1ea0786742508d2a95c0671040149143e4b10d0 /drivers/media/dvb/frontends/cx24116.c | |
parent | 6b73eeafbc856c0cef7166242f0e55403407f355 (diff) | |
download | linux-fsl-qoriq-0d46748c3f874defbbbf98bcf40c7b18964abbc0.tar.xz |
V4L/DVB (8986): cx24116: Adding DVB-S2 demodulator support
Adds support for the COnexant cx24116 DVB-S2 demodulator.
TODO: checkpatch cleanup.
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/frontends/cx24116.c')
-rw-r--r-- | drivers/media/dvb/frontends/cx24116.c | 950 |
1 files changed, 950 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/cx24116.c b/drivers/media/dvb/frontends/cx24116.c new file mode 100644 index 0000000..1402086 --- /dev/null +++ b/drivers/media/dvb/frontends/cx24116.c @@ -0,0 +1,950 @@ +/* + Conexant cx24116/cx24118 - DVBS/S2 Satellite demod/tuner driver + + Copyright (C) 2006-2008 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. +*/ + +/* + * Updates by Darron Broad 2007. + * + * March + * Fixed some bugs. + * Added diseqc support. + * Added corrected signal strength support. + * + * August + * Sync with legacy version. + * Some clean ups. + */ + +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/firmware.h> + +#include "dvb_frontend.h" +#include "cx24116.h" + +/* + * Fetch firmware in the following manner. + * + * #!/bin/sh + * wget ftp://167.206.143.11/outgoing/Oxford/88x_2_117_24275_1_INF.zip + * unzip 88x_2_117_24275_1_INF.zip + * dd if=Driver88/hcw88bda.sys of=dvb-fe-cx24116.fw skip=81768 bs=1 count=32522 + */ +#define CX24116_DEFAULT_FIRMWARE "dvb-fe-cx24116.fw" +#define CX24116_SEARCH_RANGE_KHZ 5000 + +/* registers (TO BE COMPLETED) */ +#define CX24116_REG_SIGNAL (0xd5) + +/* arg buffer size */ +#define CX24116_ARGLEN (0x1e) + +/* arg offset for DiSEqC */ +#define CX24116_DISEQC_BURST (1) +#define CX24116_DISEQC_ARG2_2 (2) /* unknown value=2 */ +#define CX24116_DISEQC_ARG3_0 (3) /* unknown value=0 */ +#define CX24116_DISEQC_ARG4_0 (4) /* unknown value=0 */ +#define CX24116_DISEQC_MSGLEN (5) +#define CX24116_DISEQC_MSGOFS (6) + +/* DiSEqC burst */ +#define CX24116_DISEQC_MINI_A (0) +#define CX24116_DISEQC_MINI_B (1) + +static int debug = 0; +#define dprintk(args...) \ + do { \ + if (debug) printk ("cx24116: " args); \ + } while (0) + +enum cmds +{ + CMD_INIT_CMD10 = 0x10, + CMD_TUNEREQUEST = 0x11, + CMD_INIT_CMD13 = 0x13, + CMD_INIT_CMD14 = 0x14, + CMD_SEND_DISEQC = 0x21, + CMD_SET_TONEPRE = 0x22, + CMD_SET_TONE = 0x23, +}; + +/* The Demod/Tuner can't easily provide these, we cache them */ +struct cx24116_tuning +{ + u32 frequency; + u32 symbol_rate; + fe_spectral_inversion_t inversion; + fe_code_rate_t fec; + + fe_modulation_t modulation; + + /* Demod values */ + u8 fec_val; + u8 fec_mask; + u8 inversion_val; +}; + +/* Basic commands that are sent to the firmware */ +struct cx24116_cmd +{ + u8 len; + u8 args[CX24116_ARGLEN]; +}; + +struct cx24116_state +{ + struct i2c_adapter* i2c; + const struct cx24116_config* config; + + struct dvb_frontend frontend; + + struct cx24116_tuning dcur; + struct cx24116_tuning dnxt; + + u8 skip_fw_load; + u8 burst; +}; + +static int cx24116_writereg(struct cx24116_state* state, int reg, int data) +{ + u8 buf[] = { reg, data }; + struct i2c_msg msg = { .addr = state->config->demod_address, + .flags = 0, .buf = buf, .len = 2 }; + int err; + + if (debug>1) + printk("cx24116: %s: write reg 0x%02x, value 0x%02x\n", + __func__,reg, data); + + if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { + printk("%s: writereg error(err == %i, reg == 0x%02x," + " value == 0x%02x)\n", __func__, err, reg, data); + return -EREMOTEIO; + } + + return 0; +} + +/* Bulk byte writes to a single I2C address, for 32k firmware load */ +static int cx24116_writeregN(struct cx24116_state* state, int reg, u8 *data, u16 len) +{ + int ret = -EREMOTEIO; + struct i2c_msg msg; + u8 *buf; + + buf = kmalloc(len + 1, GFP_KERNEL); + if (buf == NULL) { + printk("Unable to kmalloc\n"); + ret = -ENOMEM; + goto error; + } + + *(buf) = reg; + memcpy(buf + 1, data, len); + + msg.addr = state->config->demod_address; + msg.flags = 0; + msg.buf = buf; + msg.len = len + 1; + + if (debug>1) + printk("cx24116: %s: write regN 0x%02x, len = %d\n", + __func__,reg, len); + + if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1) { + printk("%s: writereg error(err == %i, reg == 0x%02x\n", + __func__, ret, reg); + ret = -EREMOTEIO; + } + +error: + kfree(buf); + + return ret; +} + +static int cx24116_readreg(struct cx24116_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: reg=0x%x (error=%d)\n", __func__, reg, ret); + return ret; + } + + if (debug>1) + printk("cx24116: read reg 0x%02x, value 0x%02x\n",reg, b1[0]); + + return b1[0]; +} + +static int cx24116_set_inversion(struct cx24116_state* state, fe_spectral_inversion_t inversion) +{ + dprintk("%s(%d)\n", __func__, inversion); + + switch (inversion) { + case INVERSION_OFF: + state->dnxt.inversion_val = 0x00; + break; + case INVERSION_ON: + state->dnxt.inversion_val = 0x04; + break; + case INVERSION_AUTO: + state->dnxt.inversion_val = 0x0C; + break; + default: + return -EINVAL; + } + + state->dnxt.inversion = inversion; + + return 0; +} + +/* A table of modulation, fec and configuration bytes for the demod. + * Not all S2 mmodulation schemes are support and not all rates with + * a scheme are support. Especially, no auto detect when in S2 mode. + */ +struct cx24116_modfec { + fe_modulation_t modulation; + fe_code_rate_t fec; + u8 mask; /* In DVBS mode this is used to autodetect */ + u8 val; /* Passed to the firmware to indicate mode selection */ +} CX24116_MODFEC_MODES[] = { + /* QPSK. For unknown rates we set hardware to auto detect 0xfe 0x30 */ + { QPSK, FEC_NONE, 0xfe, 0x30 }, + { QPSK, FEC_1_2, 0x02, 0x2e }, + { QPSK, FEC_2_3, 0x04, 0x2f }, + { QPSK, FEC_3_4, 0x08, 0x30 }, + { QPSK, FEC_4_5, 0xfe, 0x30 }, + { QPSK, FEC_5_6, 0x20, 0x31 }, + { QPSK, FEC_6_7, 0xfe, 0x30 }, + { QPSK, FEC_7_8, 0x80, 0x32 }, + { QPSK, FEC_8_9, 0xfe, 0x30 }, + { QPSK, FEC_AUTO, 0xfe, 0x30 }, + /* NBC-QPSK */ + { NBC_QPSK, FEC_1_2, 0x00, 0x04 }, + { NBC_QPSK, FEC_3_5, 0x00, 0x05 }, + { NBC_QPSK, FEC_2_3, 0x00, 0x06 }, + { NBC_QPSK, FEC_3_4, 0x00, 0x07 }, + { NBC_QPSK, FEC_4_5, 0x00, 0x08 }, + { NBC_QPSK, FEC_5_6, 0x00, 0x09 }, + { NBC_QPSK, FEC_8_9, 0x00, 0x0a }, + { NBC_QPSK, FEC_9_10, 0x00, 0x0b }, + /* 8PSK */ + { _8PSK, FEC_3_5, 0x00, 0x0c }, + { _8PSK, FEC_2_3, 0x00, 0x0d }, + { _8PSK, FEC_3_4, 0x00, 0x0e }, + { _8PSK, FEC_5_6, 0x00, 0x0f }, + { _8PSK, FEC_9_10, 0x00, 0x11 }, +}; + +static int cx24116_lookup_fecmod(struct cx24116_state* state, + fe_modulation_t m, fe_code_rate_t f) +{ + int i, ret = -EOPNOTSUPP; + + for(i=0 ; i < sizeof(CX24116_MODFEC_MODES) / sizeof(struct cx24116_modfec) ; i++) + { + if( (m == CX24116_MODFEC_MODES[i].modulation) && + (f == CX24116_MODFEC_MODES[i].fec) ) + { + ret = i; + break; + } + } + + return ret; +} + +static int cx24116_set_fec(struct cx24116_state* state, fe_modulation_t mod, fe_code_rate_t fec) +{ + int ret = 0; + dprintk("%s()\n", __func__); + + ret = cx24116_lookup_fecmod(state, mod, fec); + + if(ret < 0) + return ret; + + state->dnxt.fec_val = CX24116_MODFEC_MODES[ret].val; + state->dnxt.fec_mask = CX24116_MODFEC_MODES[ret].mask; + dprintk("%s() fec_val/mask = 0x%02x/0x%02x\n", __func__, + state->dnxt.fec_val, state->dnxt.fec_mask); + + return 0; +} + +static int cx24116_set_symbolrate(struct cx24116_state* state, u32 rate) +{ + int ret = 0; + + dprintk("%s()\n", __func__); + + state->dnxt.symbol_rate = rate; + + dprintk("%s() symbol_rate = %d\n", __func__, state->dnxt.symbol_rate); + + /* check if symbol rate is within limits */ + if ((state->dnxt.symbol_rate > state->frontend.ops.info.symbol_rate_max) || + (state->dnxt.symbol_rate < state->frontend.ops.info.symbol_rate_min)) + ret = -EOPNOTSUPP; + + return ret; +} + +static int cx24116_load_firmware (struct dvb_frontend* fe, const struct firmware *fw); + +static int cx24116_firmware_ondemand(struct dvb_frontend* fe) +{ + struct cx24116_state *state = fe->demodulator_priv; + const struct firmware *fw; + int ret = 0; + + dprintk("%s()\n",__func__); + + if (cx24116_readreg(state, 0x20) > 0) + { + + if (state->skip_fw_load) + return 0; + + /* Load firmware */ + /* request the firmware, this will block until someone uploads it */ + printk("%s: Waiting for firmware upload (%s)...\n", __func__, CX24116_DEFAULT_FIRMWARE); + ret = request_firmware(&fw, CX24116_DEFAULT_FIRMWARE, &state->i2c->dev); + printk("%s: Waiting for firmware upload(2)...\n", __func__); + if (ret) { + printk("%s: No firmware uploaded (timeout or file not found?)\n", __func__); + return ret; + } + + /* Make sure we don't recurse back through here during loading */ + state->skip_fw_load = 1; + + ret = cx24116_load_firmware(fe, fw); + if (ret) + printk("%s: Writing firmware to device failed\n", __func__); + + release_firmware(fw); + + printk("%s: Firmware upload %s\n", __func__, ret == 0 ? "complete" : "failed"); + + /* Ensure firmware is always loaded if required */ + state->skip_fw_load = 0; + } + + return ret; +} + +/* Take a basic firmware command structure, format it and forward it for processing */ +static int cx24116_cmd_execute(struct dvb_frontend* fe, struct cx24116_cmd *cmd) +{ + struct cx24116_state *state = fe->demodulator_priv; + int i, ret; + + dprintk("%s()\n", __func__); + + /* Load the firmware if required */ + if ( (ret = cx24116_firmware_ondemand(fe)) != 0) + { + printk("%s(): Unable initialise the firmware\n", __func__); + return ret; + } + + /* Write the command */ + for(i = 0; i < cmd->len ; i++) + { + dprintk("%s: 0x%02x == 0x%02x\n", __func__, i, cmd->args[i]); + cx24116_writereg(state, i, cmd->args[i]); + } + + /* Start execution and wait for cmd to terminate */ + cx24116_writereg(state, 0x1f, 0x01); + while( cx24116_readreg(state, 0x1f) ) + { + msleep(10); + if(i++ > 64) + { + /* Avoid looping forever if the firmware does no respond */ + printk("%s() Firmware not responding\n", __func__); + return -EREMOTEIO; + } + } + return 0; +} + +static int cx24116_load_firmware (struct dvb_frontend* fe, const struct firmware *fw) +{ + struct cx24116_state* state = fe->demodulator_priv; + struct cx24116_cmd cmd; + int ret; + + dprintk("%s\n", __func__); + dprintk("Firmware is %zu bytes (%02x %02x .. %02x %02x)\n" + ,fw->size + ,fw->data[0] + ,fw->data[1] + ,fw->data[ fw->size-2 ] + ,fw->data[ fw->size-1 ] + ); + + /* Toggle 88x SRST pin to reset demod */ + if (state->config->reset_device) + state->config->reset_device(fe); + + /* Begin the firmware load process */ + /* Prepare the demod, load the firmware, cleanup after load */ + cx24116_writereg(state, 0xF1, 0x08); + cx24116_writereg(state, 0xF2, cx24116_readreg(state, 0xF2) | 0x03); + cx24116_writereg(state, 0xF3, 0x46); + cx24116_writereg(state, 0xF9, 0x00); + + cx24116_writereg(state, 0xF0, 0x03); + cx24116_writereg(state, 0xF4, 0x81); + cx24116_writereg(state, 0xF5, 0x00); + cx24116_writereg(state, 0xF6, 0x00); + + /* write the entire firmware as one transaction */ + cx24116_writeregN(state, 0xF7, fw->data, fw->size); + + cx24116_writereg(state, 0xF4, 0x10); + cx24116_writereg(state, 0xF0, 0x00); + cx24116_writereg(state, 0xF8, 0x06); + + /* Firmware CMD 10: Chip config? */ + cmd.args[0x00] = CMD_INIT_CMD10; + cmd.args[0x01] = 0x05; + cmd.args[0x02] = 0xdc; + cmd.args[0x03] = 0xda; + cmd.args[0x04] = 0xae; + cmd.args[0x05] = 0xaa; + cmd.args[0x06] = 0x04; + cmd.args[0x07] = 0x9d; + cmd.args[0x08] = 0xfc; + cmd.args[0x09] = 0x06; + cmd.len= 0x0a; + ret = cx24116_cmd_execute(fe, &cmd); + if (ret != 0) + return ret; + + cx24116_writereg(state, 0x9d, 0x00); + + /* Firmware CMD 14: Unknown */ + cmd.args[0x00] = CMD_INIT_CMD14; + cmd.args[0x01] = 0x00; + cmd.args[0x02] = 0x00; + cmd.len= 0x03; + ret = cx24116_cmd_execute(fe, &cmd); + if (ret != 0) + return ret; + + cx24116_writereg(state, 0xe5, 0x00); + + /* Firmware CMD 13: Unknown - Firmware config? */ + cmd.args[0x00] = CMD_INIT_CMD13; + cmd.args[0x01] = 0x01; + cmd.args[0x02] = 0x75; + cmd.args[0x03] = 0x00; + cmd.args[0x04] = 0x02; + cmd.args[0x05] = 0x00; + cmd.len= 0x06; + ret = cx24116_cmd_execute(fe, &cmd); + if (ret != 0) + return ret; + + return 0; +} + +static int cx24116_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage) +{ + /* The isl6421 module will override this function in the fops. */ + dprintk("%s() This should never appear if the isl6421 module is loaded correctly\n",__func__); + + return -EOPNOTSUPP; +} + +static int cx24116_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct cx24116_state *state = fe->demodulator_priv; + + int lock = cx24116_readreg(state, 0x9d); + + dprintk("%s: status = 0x%02x\n", __func__, lock); + + *status = 0; + + if (lock & 0x01) + *status |= FE_HAS_SIGNAL; + if (lock & 0x02) + *status |= FE_HAS_CARRIER; + if (lock & 0x04) + *status |= FE_HAS_VITERBI; + if (lock & 0x08) + *status |= FE_HAS_SYNC | FE_HAS_LOCK; + + return 0; +} + +/* TODO: Not clear how we do this */ +static int cx24116_read_ber(struct dvb_frontend* fe, u32* ber) +{ + //struct cx24116_state *state = fe->demodulator_priv; + dprintk("%s()\n", __func__); + *ber = 0; + + return 0; +} + +/* Signal strength (0..100)% = (sig & 0xf0) * 10 + (sig & 0x0f) * 10 / 16 */ +static int cx24116_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength) +{ + struct cx24116_state *state = fe->demodulator_priv; + u8 strength_reg; + static const u32 strength_tab[] = { /* 10 x Table (rounded up) */ + 0x00000,0x0199A,0x03333,0x04ccD,0x06667,0x08000,0x0999A,0x0b333,0x0cccD,0x0e667, + 0x10000,0x1199A,0x13333,0x14ccD,0x16667,0x18000 }; + + dprintk("%s()\n", __func__); + + strength_reg = cx24116_readreg(state, CX24116_REG_SIGNAL); + + if(strength_reg < 0xa0) + *signal_strength = strength_tab [ ( strength_reg & 0xf0 ) >> 4 ] + + ( strength_tab [ ( strength_reg & 0x0f ) ] >> 4 ); + else + *signal_strength = 0xffff; + + dprintk("%s: Signal strength (raw / cooked) = (0x%02x / 0x%04x)\n", + __func__,strength_reg,*signal_strength); + + return 0; +} + +/* TODO: Not clear how we do this */ +static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr) +{ + //struct cx24116_state *state = fe->demodulator_priv; + dprintk("%s()\n", __func__); + *snr = 0; + + return 0; +} + +/* TODO: Not clear how we do this */ +static int cx24116_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + //struct cx24116_state *state = fe->demodulator_priv; + dprintk("%s()\n", __func__); + *ucblocks = 0; + + return 0; +} + +/* Overwrite the current tuning params, we are about to tune */ +static void cx24116_clone_params(struct dvb_frontend* fe) +{ + struct cx24116_state *state = fe->demodulator_priv; + memcpy(&state->dcur, &state->dnxt, sizeof(state->dcur)); +} + +static int cx24116_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone) +{ + struct cx24116_cmd cmd; + int ret; + + dprintk("%s(%d)\n", __func__, tone); + if ( (tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF) ) { + printk("%s: Invalid, tone=%d\n", __func__, tone); + return -EINVAL; + } + + /* This is always done before the tone is set */ + cmd.args[0x00] = CMD_SET_TONEPRE; + cmd.args[0x01] = 0x00; + cmd.len= 0x02; + ret = cx24116_cmd_execute(fe, &cmd); + if (ret != 0) + return ret; + + /* Now we set the tone */ + cmd.args[0x00] = CMD_SET_TONE; + cmd.args[0x01] = 0x00; + cmd.args[0x02] = 0x00; + + switch (tone) { + case SEC_TONE_ON: + dprintk("%s: setting tone on\n", __func__); + cmd.args[0x03] = 0x01; + break; + case SEC_TONE_OFF: + dprintk("%s: setting tone off\n",__func__); + cmd.args[0x03] = 0x00; + break; + } + cmd.len= 0x04; + + return cx24116_cmd_execute(fe, &cmd); +} + +/* Initialise DiSEqC */ +static int cx24116_diseqc_init(struct dvb_frontend* fe) +{ + struct cx24116_state *state = fe->demodulator_priv; + + /* Default DiSEqC burst state */ + state->burst = CX24116_DISEQC_MINI_A; + + return 0; +} + +/* Send DiSEqC message with derived burst (hack) || previous burst */ +static int cx24116_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *d) +{ + struct cx24116_state *state = fe->demodulator_priv; + struct cx24116_cmd cmd; + int i, ret; + + /* Dump DiSEqC message */ + if (debug) { + printk("cx24116: %s(", __func__); + for(i = 0 ; i < d->msg_len ;) { + printk("0x%02x", d->msg[i]); + if(++i < d->msg_len) + printk(", "); + } + printk(")\n"); + } + + if(d->msg_len > (CX24116_ARGLEN - CX24116_DISEQC_MSGOFS)) + return -EINVAL; + + cmd.args[0x00] = CMD_SEND_DISEQC; + cmd.args[CX24116_DISEQC_ARG2_2] = 0x02; + cmd.args[CX24116_DISEQC_ARG3_0] = 0x00; + cmd.args[CX24116_DISEQC_ARG4_0] = 0x00; + + /* DiSEqC message */ + for (i = 0; i < d->msg_len; i++) + cmd.args[CX24116_DISEQC_MSGOFS + i] = d->msg[i]; + + /* Hack: Derive burst from command else use previous burst */ + if(d->msg_len >= 4 && d->msg[2] == 0x38) + cmd.args[CX24116_DISEQC_BURST] = (d->msg[3] >> 2) & 1; + else + cmd.args[CX24116_DISEQC_BURST] = state->burst; + + cmd.args[CX24116_DISEQC_MSGLEN] = d->msg_len; + cmd.len = CX24116_DISEQC_MSGOFS + d->msg_len; + + ret = cx24116_cmd_execute(fe, &cmd); + + /* Firmware command duration is unknown, so guess... + * + * Eutelsat spec: + * >15ms delay + + * 13.5ms per byte + + * >15ms delay + + * 12.5ms burst + + * >15ms delay + */ + if(ret == 0) + msleep( (cmd.args[CX24116_DISEQC_MSGLEN] << 4) + 60 ); + + return ret; +} + +/* Send DiSEqC burst */ +static int cx24116_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst) +{ + struct cx24116_state *state = fe->demodulator_priv; + struct cx24116_cmd cmd; + int ret; + + dprintk("%s(%d)\n",__func__,(int)burst); + + cmd.args[0x00] = CMD_SEND_DISEQC; + cmd.args[CX24116_DISEQC_ARG2_2] = 0x02; + cmd.args[CX24116_DISEQC_ARG3_0] = 0x00; + cmd.args[CX24116_DISEQC_ARG4_0] = 0x00; + + if (burst == SEC_MINI_A) + cmd.args[CX24116_DISEQC_BURST] = CX24116_DISEQC_MINI_A; + else if(burst == SEC_MINI_B) + cmd.args[CX24116_DISEQC_BURST] = CX24116_DISEQC_MINI_B; + else + return -EINVAL; + + /* Cache as previous burst state */ + state->burst= cmd.args[CX24116_DISEQC_BURST]; + + cmd.args[CX24116_DISEQC_MSGLEN] = 0x00; + cmd.len= CX24116_DISEQC_MSGOFS; + + ret= cx24116_cmd_execute(fe, &cmd); + + /* Firmware command duration is unknown, so guess... */ + if(ret == 0) + msleep(60); + + return ret; +} + +static void cx24116_release(struct dvb_frontend* fe) +{ + struct cx24116_state* state = fe->demodulator_priv; + dprintk("%s\n",__func__); + kfree(state); +} + +static struct dvb_frontend_ops cx24116_ops; + +struct dvb_frontend* cx24116_attach(const struct cx24116_config* config, + struct i2c_adapter* i2c) +{ + struct cx24116_state* state = NULL; + int ret; + + dprintk("%s\n",__func__); + + /* allocate memory for the internal state */ + state = kmalloc(sizeof(struct cx24116_state), GFP_KERNEL); + if (state == NULL) { + printk("Unable to kmalloc\n"); + goto error; + } + + /* setup the state */ + memset(state, 0, sizeof(struct cx24116_state)); + + state->config = config; + state->i2c = i2c; + + /* check if the demod is present */ + ret = (cx24116_readreg(state, 0xFF) << 8) | cx24116_readreg(state, 0xFE); + if (ret != 0x0501) { + printk("Invalid probe, probably not a CX24116 device\n"); + goto error; + } + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &cx24116_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + + return NULL; +} + +static int cx24116_get_params(struct dvb_frontend* fe) +{ + struct cx24116_state *state = fe->demodulator_priv; + struct tv_frontend_properties *cache = &fe->tv_property_cache; + + dprintk("%s()\n",__func__); + + cache->frequency = state->dcur.frequency; + cache->inversion = state->dcur.inversion; + cache->modulation = state->dcur.modulation; + cache->fec_inner = state->dcur.fec; + cache->symbol_rate = state->dcur.symbol_rate; + + return 0; +} + +static int cx24116_initfe(struct dvb_frontend* fe) +{ + dprintk("%s()\n",__func__); + + return cx24116_diseqc_init(fe); +} + +static int cx24116_set_property(struct dvb_frontend *fe, tv_property_t* tvp) +{ + dprintk("%s(..)\n", __func__); + return 0; +} + +static int cx24116_set_params(struct dvb_frontend *fe) +{ + dprintk("%s(..) We were notified that a tune request may occur\n", __func__); + return 0; +} + +/* dvb-core told us to tune, the tv property cache will be complete, + * it's safe for is to pull values and use them for tuning purposes. + */ +static int cx24116_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct cx24116_state *state = fe->demodulator_priv; + struct tv_frontend_properties *c = &fe->tv_property_cache; + struct cx24116_cmd cmd; + fe_status_t tunerstat; + int ret; + u8 retune=4; + + dprintk("%s()\n",__func__); + + state->dnxt.modulation = c->modulation; + state->dnxt.frequency = c->frequency; + + if ((ret = cx24116_set_inversion(state, c->inversion)) != 0) + return ret; + + if ((ret = cx24116_set_fec(state, c->modulation, c->fec_inner)) != 0) + return ret; + + if ((ret = cx24116_set_symbolrate(state, c->symbol_rate)) != 0) + return ret; + + /* discard the 'current' tuning parameters and prepare to tune */ + cx24116_clone_params(fe); + + dprintk("%s: frequency = %d\n", __func__, state->dcur.frequency); + dprintk("%s: symbol_rate = %d\n", __func__, state->dcur.symbol_rate); + dprintk("%s: FEC = %d (mask/val = 0x%02x/0x%02x)\n", __func__, + state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val); + dprintk("%s: Inversion = %d (val = 0x%02x)\n", __func__, + state->dcur.inversion, state->dcur.inversion_val); + + if (state->config->set_ts_params) + state->config->set_ts_params(fe, 0); + + /* Prepare a tune request */ + cmd.args[0x00] = CMD_TUNEREQUEST; + + /* Frequency */ + cmd.args[0x01] = (state->dcur.frequency & 0xff0000) >> 16; + cmd.args[0x02] = (state->dcur.frequency & 0x00ff00) >> 8; + cmd.args[0x03] = (state->dcur.frequency & 0x0000ff); + + /* Symbol Rate */ + cmd.args[0x04] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8; + cmd.args[0x05] = ((state->dcur.symbol_rate / 1000) & 0x00ff); + + /* Automatic Inversion */ + cmd.args[0x06] = state->dcur.inversion_val; + + /* Modulation / FEC & Pilot Off */ + cmd.args[0x07] = state->dcur.fec_val; + + if (c->pilot == PILOT_ON) + cmd.args[0x07] |= 0x40; + + cmd.args[0x08] = CX24116_SEARCH_RANGE_KHZ >> 8; + cmd.args[0x09] = CX24116_SEARCH_RANGE_KHZ & 0xff; + cmd.args[0x0a] = 0x00; + cmd.args[0x0b] = 0x00; + cmd.args[0x0c] = 0x02; + cmd.args[0x0d] = state->dcur.fec_mask; + cmd.args[0x0e] = 0x06; + cmd.args[0x0f] = 0x00; + cmd.args[0x10] = 0x00; + cmd.args[0x11] = 0xFA; + cmd.args[0x12] = 0x24; + cmd.len= 0x13; + + /* We need to support pilot and non-pilot tuning in the + * driver automatically. This is a workaround for because + * the demod does not support autodetect. + */ + do { + /* Reset status register? */ + cx24116_writereg(state, 0x9d, 0xc1); + + /* Tune */ + ret = cx24116_cmd_execute(fe, &cmd); + if( ret != 0 ) + break; + + /* The hardware can take time to lock, wait a while */ + msleep(500); + + cx24116_read_status(fe, &tunerstat); + if(tunerstat & FE_HAS_SIGNAL) { + if(tunerstat & FE_HAS_SYNC) + /* Tuned */ + break; + else if(c->pilot == PILOT_AUTO) + /* Toggle pilot bit */ + cmd.args[0x07] ^= 0x40; + } + } + while(--retune); + + return ret; +} + +static struct dvb_frontend_ops cx24116_ops = { + + .info = { + .name = "Conexant CX24116/CX24118", + .type = FE_QPSK, + .frequency_min = 950000, + .frequency_max = 2150000, + .frequency_stepsize = 1011, /* kHz for QPSK frontends */ + .frequency_tolerance = 5000, + .symbol_rate_min = 1000000, + .symbol_rate_max = 45000000, + .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_AUTO | + FE_CAN_QPSK | FE_CAN_RECOVER + }, + + .release = cx24116_release, + + .init = cx24116_initfe, + .read_status = cx24116_read_status, + .read_ber = cx24116_read_ber, + .read_signal_strength = cx24116_read_signal_strength, + .read_snr = cx24116_read_snr, + .read_ucblocks = cx24116_read_ucblocks, + .set_tone = cx24116_set_tone, + .set_voltage = cx24116_set_voltage, + .diseqc_send_master_cmd = cx24116_send_diseqc_msg, + .diseqc_send_burst = cx24116_diseqc_send_burst, + + .set_property = cx24116_set_property, + .set_params = cx24116_set_params, + .set_frontend = cx24116_set_frontend, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); + +MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24116/cx24118 hardware"); +MODULE_AUTHOR("Steven Toth"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(cx24116_attach); |