+++ /dev/null
-/*
- Support for B2C2/BBTI Technisat Air2PC - ATSC
-
- Copyright (C) 2004 Taylor Jacob <rtjacob@earthlink.net>
-
- 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.
-
-*/
-
-/*
- * This driver needs external firmware. Please use the command
- * "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2002" to
- * download/extract it, and then copy it to /usr/lib/hotplug/firmware
- * or /lib/firmware (depending on configuration of firmware hotplug).
- */
-#define NXT2002_DEFAULT_FIRMWARE "dvb-fe-nxt2002.fw"
-#define CRC_CCIT_MASK 0x1021
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/device.h>
-#include <linux/firmware.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-
-#include "dvb_frontend.h"
-#include "nxt2002.h"
-
-struct nxt2002_state {
-
- struct i2c_adapter* i2c;
- struct dvb_frontend_ops ops;
- const struct nxt2002_config* config;
- struct dvb_frontend frontend;
-
- /* demodulator private data */
- u8 initialised:1;
-};
-
-static int debug;
-#define dprintk(args...) \
- do { \
- if (debug) printk(KERN_DEBUG "nxt2002: " args); \
- } while (0)
-
-static int i2c_writebytes (struct nxt2002_state* state, u8 reg, u8 *buf, u8 len)
-{
- /* probbably a much better way or doing this */
- u8 buf2 [256],x;
- int err;
- struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf2, .len = len + 1 };
-
- buf2[0] = reg;
- for (x = 0 ; x < len ; x++)
- buf2[x+1] = buf[x];
-
- if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
- printk ("%s: i2c write error (addr %02x, err == %i)\n",
- __FUNCTION__, state->config->demod_address, err);
- return -EREMOTEIO;
- }
-
- return 0;
-}
-
-static u8 i2c_readbytes (struct nxt2002_state* state, u8 reg, u8* buf, u8 len)
-{
- u8 reg2 [] = { reg };
-
- struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = reg2, .len = 1 },
- { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf, .len = len } };
-
- int err;
-
- if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
- printk ("%s: i2c read error (addr %02x, err == %i)\n",
- __FUNCTION__, state->config->demod_address, err);
- return -EREMOTEIO;
- }
-
- return 0;
-}
-
-static u16 nxt2002_crc(u16 crc, u8 c)
-{
-
- u8 i;
- u16 input = (u16) c & 0xFF;
-
- input<<=8;
- for(i=0 ;i<8 ;i++) {
- if((crc ^ input) & 0x8000)
- crc=(crc<<1)^CRC_CCIT_MASK;
- else
- crc<<=1;
- input<<=1;
- }
- return crc;
-}
-
-static int nxt2002_writereg_multibyte (struct nxt2002_state* state, u8 reg, u8* data, u8 len)
-{
- u8 buf;
- dprintk("%s\n", __FUNCTION__);
-
- /* set multi register length */
- i2c_writebytes(state,0x34,&len,1);
-
- /* set mutli register register */
- i2c_writebytes(state,0x35,®,1);
-
- /* send the actual data */
- i2c_writebytes(state,0x36,data,len);
-
- /* toggle the multireg write bit*/
- buf = 0x02;
- i2c_writebytes(state,0x21,&buf,1);
-
- i2c_readbytes(state,0x21,&buf,1);
-
- if ((buf & 0x02) == 0)
- return 0;
-
- dprintk("Error writing multireg register %02X\n",reg);
-
- return 0;
-}
-
-static int nxt2002_readreg_multibyte (struct nxt2002_state* state, u8 reg, u8* data, u8 len)
-{
- u8 len2;
- dprintk("%s\n", __FUNCTION__);
-
- /* set multi register length */
- len2 = len & 0x80;
- i2c_writebytes(state,0x34,&len2,1);
-
- /* set mutli register register */
- i2c_writebytes(state,0x35,®,1);
-
- /* send the actual data */
- i2c_readbytes(state,reg,data,len);
-
- return 0;
-}
-
-static void nxt2002_microcontroller_stop (struct nxt2002_state* state)
-{
- u8 buf[2],counter = 0;
- dprintk("%s\n", __FUNCTION__);
-
- buf[0] = 0x80;
- i2c_writebytes(state,0x22,buf,1);
-
- while (counter < 20) {
- i2c_readbytes(state,0x31,buf,1);
- if (buf[0] & 0x40)
- return;
- msleep(10);
- counter++;
- }
-
- dprintk("Timeout waiting for micro to stop.. This is ok after firmware upload\n");
- return;
-}
-
-static void nxt2002_microcontroller_start (struct nxt2002_state* state)
-{
- u8 buf;
- dprintk("%s\n", __FUNCTION__);
-
- buf = 0x00;
- i2c_writebytes(state,0x22,&buf,1);
-}
-
-static int nxt2002_writetuner (struct nxt2002_state* state, u8* data)
-{
- u8 buf,count = 0;
-
- dprintk("Tuner Bytes: %02X %02X %02X %02X\n",data[0],data[1],data[2],data[3]);
-
- dprintk("%s\n", __FUNCTION__);
- /* stop the micro first */
- nxt2002_microcontroller_stop(state);
-
- /* set the i2c transfer speed to the tuner */
- buf = 0x03;
- i2c_writebytes(state,0x20,&buf,1);
-
- /* setup to transfer 4 bytes via i2c */
- buf = 0x04;
- i2c_writebytes(state,0x34,&buf,1);
-
- /* write actual tuner bytes */
- i2c_writebytes(state,0x36,data,4);
-
- /* set tuner i2c address */
- buf = 0xC2;
- i2c_writebytes(state,0x35,&buf,1);
-
- /* write UC Opmode to begin transfer */
- buf = 0x80;
- i2c_writebytes(state,0x21,&buf,1);
-
- while (count < 20) {
- i2c_readbytes(state,0x21,&buf,1);
- if ((buf & 0x80)== 0x00)
- return 0;
- msleep(100);
- count++;
- }
-
- printk("nxt2002: timeout error writing tuner\n");
- return 0;
-}
-
-static void nxt2002_agc_reset(struct nxt2002_state* state)
-{
- u8 buf;
- dprintk("%s\n", __FUNCTION__);
-
- buf = 0x08;
- i2c_writebytes(state,0x08,&buf,1);
-
- buf = 0x00;
- i2c_writebytes(state,0x08,&buf,1);
-
- return;
-}
-
-static int nxt2002_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
-{
-
- struct nxt2002_state* state = fe->demodulator_priv;
- u8 buf[256],written = 0,chunkpos = 0;
- u16 rambase,position,crc = 0;
-
- dprintk("%s\n", __FUNCTION__);
- dprintk("Firmware is %zu bytes\n",fw->size);
-
- /* Get the RAM base for this nxt2002 */
- i2c_readbytes(state,0x10,buf,1);
-
- if (buf[0] & 0x10)
- rambase = 0x1000;
- else
- rambase = 0x0000;
-
- dprintk("rambase on this nxt2002 is %04X\n",rambase);
-
- /* Hold the micro in reset while loading firmware */
- buf[0] = 0x80;
- i2c_writebytes(state,0x2B,buf,1);
-
- for (position = 0; position < fw->size ; position++) {
- if (written == 0) {
- crc = 0;
- chunkpos = 0x28;
- buf[0] = ((rambase + position) >> 8);
- buf[1] = (rambase + position) & 0xFF;
- buf[2] = 0x81;
- /* write starting address */
- i2c_writebytes(state,0x29,buf,3);
- }
- written++;
- chunkpos++;
-
- if ((written % 4) == 0)
- i2c_writebytes(state,chunkpos,&fw->data[position-3],4);
-
- crc = nxt2002_crc(crc,fw->data[position]);
-
- if ((written == 255) || (position+1 == fw->size)) {
- /* write remaining bytes of firmware */
- i2c_writebytes(state, chunkpos+4-(written %4),
- &fw->data[position-(written %4) + 1],
- written %4);
- buf[0] = crc << 8;
- buf[1] = crc & 0xFF;
-
- /* write crc */
- i2c_writebytes(state,0x2C,buf,2);
-
- /* do a read to stop things */
- i2c_readbytes(state,0x2A,buf,1);
-
- /* set transfer mode to complete */
- buf[0] = 0x80;
- i2c_writebytes(state,0x2B,buf,1);
-
- written = 0;
- }
- }
-
- printk ("done.\n");
- return 0;
-};
-
-static int nxt2002_setup_frontend_parameters (struct dvb_frontend* fe,
- struct dvb_frontend_parameters *p)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- u32 freq = 0;
- u16 tunerfreq = 0;
- u8 buf[4];
-
- freq = 44000 + ( p->frequency / 1000 );
-
- dprintk("freq = %d p->frequency = %d\n",freq,p->frequency);
-
- tunerfreq = freq * 24/4000;
-
- buf[0] = (tunerfreq >> 8) & 0x7F;
- buf[1] = (tunerfreq & 0xFF);
-
- if (p->frequency <= 214000000) {
- buf[2] = 0x84 + (0x06 << 3);
- buf[3] = (p->frequency <= 172000000) ? 0x01 : 0x02;
- } else if (p->frequency <= 721000000) {
- buf[2] = 0x84 + (0x07 << 3);
- buf[3] = (p->frequency <= 467000000) ? 0x02 : 0x08;
- } else if (p->frequency <= 841000000) {
- buf[2] = 0x84 + (0x0E << 3);
- buf[3] = 0x08;
- } else {
- buf[2] = 0x84 + (0x0F << 3);
- buf[3] = 0x02;
- }
-
- /* write frequency information */
- nxt2002_writetuner(state,buf);
-
- /* reset the agc now that tuning has been completed */
- nxt2002_agc_reset(state);
-
- /* set target power level */
- switch (p->u.vsb.modulation) {
- case QAM_64:
- case QAM_256:
- buf[0] = 0x74;
- break;
- case VSB_8:
- buf[0] = 0x70;
- break;
- default:
- return -EINVAL;
- break;
- }
- i2c_writebytes(state,0x42,buf,1);
-
- /* configure sdm */
- buf[0] = 0x87;
- i2c_writebytes(state,0x57,buf,1);
-
- /* write sdm1 input */
- buf[0] = 0x10;
- buf[1] = 0x00;
- nxt2002_writereg_multibyte(state,0x58,buf,2);
-
- /* write sdmx input */
- switch (p->u.vsb.modulation) {
- case QAM_64:
- buf[0] = 0x68;
- break;
- case QAM_256:
- buf[0] = 0x64;
- break;
- case VSB_8:
- buf[0] = 0x60;
- break;
- default:
- return -EINVAL;
- break;
- }
- buf[1] = 0x00;
- nxt2002_writereg_multibyte(state,0x5C,buf,2);
-
- /* write adc power lpf fc */
- buf[0] = 0x05;
- i2c_writebytes(state,0x43,buf,1);
-
- /* write adc power lpf fc */
- buf[0] = 0x05;
- i2c_writebytes(state,0x43,buf,1);
-
- /* write accumulator2 input */
- buf[0] = 0x80;
- buf[1] = 0x00;
- nxt2002_writereg_multibyte(state,0x4B,buf,2);
-
- /* write kg1 */
- buf[0] = 0x00;
- i2c_writebytes(state,0x4D,buf,1);
-
- /* write sdm12 lpf fc */
- buf[0] = 0x44;
- i2c_writebytes(state,0x55,buf,1);
-
- /* write agc control reg */
- buf[0] = 0x04;
- i2c_writebytes(state,0x41,buf,1);
-
- /* write agc ucgp0 */
- switch (p->u.vsb.modulation) {
- case QAM_64:
- buf[0] = 0x02;
- break;
- case QAM_256:
- buf[0] = 0x03;
- break;
- case VSB_8:
- buf[0] = 0x00;
- break;
- default:
- return -EINVAL;
- break;
- }
- i2c_writebytes(state,0x30,buf,1);
-
- /* write agc control reg */
- buf[0] = 0x00;
- i2c_writebytes(state,0x41,buf,1);
-
- /* write accumulator2 input */
- buf[0] = 0x80;
- buf[1] = 0x00;
- nxt2002_writereg_multibyte(state,0x49,buf,2);
- nxt2002_writereg_multibyte(state,0x4B,buf,2);
-
- /* write agc control reg */
- buf[0] = 0x04;
- i2c_writebytes(state,0x41,buf,1);
-
- nxt2002_microcontroller_start(state);
-
- /* adjacent channel detection should be done here, but I don't
- have any stations with this need so I cannot test it */
-
- return 0;
-}
-
-static int nxt2002_read_status(struct dvb_frontend* fe, fe_status_t* status)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- u8 lock;
- i2c_readbytes(state,0x31,&lock,1);
-
- *status = 0;
- if (lock & 0x20) {
- *status |= FE_HAS_SIGNAL;
- *status |= FE_HAS_CARRIER;
- *status |= FE_HAS_VITERBI;
- *status |= FE_HAS_SYNC;
- *status |= FE_HAS_LOCK;
- }
- return 0;
-}
-
-static int nxt2002_read_ber(struct dvb_frontend* fe, u32* ber)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- u8 b[3];
-
- nxt2002_readreg_multibyte(state,0xE6,b,3);
-
- *ber = ((b[0] << 8) + b[1]) * 8;
-
- return 0;
-}
-
-static int nxt2002_read_signal_strength(struct dvb_frontend* fe, u16* strength)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- u8 b[2];
- u16 temp = 0;
-
- /* setup to read cluster variance */
- b[0] = 0x00;
- i2c_writebytes(state,0xA1,b,1);
-
- /* get multreg val */
- nxt2002_readreg_multibyte(state,0xA6,b,2);
-
- temp = (b[0] << 8) | b[1];
- *strength = ((0x7FFF - temp) & 0x0FFF) * 16;
-
- return 0;
-}
-
-static int nxt2002_read_snr(struct dvb_frontend* fe, u16* snr)
-{
-
- struct nxt2002_state* state = fe->demodulator_priv;
- u8 b[2];
- u16 temp = 0, temp2;
- u32 snrdb = 0;
-
- /* setup to read cluster variance */
- b[0] = 0x00;
- i2c_writebytes(state,0xA1,b,1);
-
- /* get multreg val from 0xA6 */
- nxt2002_readreg_multibyte(state,0xA6,b,2);
-
- temp = (b[0] << 8) | b[1];
- temp2 = 0x7FFF - temp;
-
- /* snr will be in db */
- if (temp2 > 0x7F00)
- snrdb = 1000*24 + ( 1000*(30-24) * ( temp2 - 0x7F00 ) / ( 0x7FFF - 0x7F00 ) );
- else if (temp2 > 0x7EC0)
- snrdb = 1000*18 + ( 1000*(24-18) * ( temp2 - 0x7EC0 ) / ( 0x7F00 - 0x7EC0 ) );
- else if (temp2 > 0x7C00)
- snrdb = 1000*12 + ( 1000*(18-12) * ( temp2 - 0x7C00 ) / ( 0x7EC0 - 0x7C00 ) );
- else
- snrdb = 1000*0 + ( 1000*(12-0) * ( temp2 - 0 ) / ( 0x7C00 - 0 ) );
-
- /* the value reported back from the frontend will be FFFF=32db 0000=0db */
-
- *snr = snrdb * (0xFFFF/32000);
-
- return 0;
-}
-
-static int nxt2002_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- u8 b[3];
-
- nxt2002_readreg_multibyte(state,0xE6,b,3);
- *ucblocks = b[2];
-
- return 0;
-}
-
-static int nxt2002_sleep(struct dvb_frontend* fe)
-{
- return 0;
-}
-
-static int nxt2002_init(struct dvb_frontend* fe)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- const struct firmware *fw;
- int ret;
- u8 buf[2];
-
- if (!state->initialised) {
- /* request the firmware, this will block until someone uploads it */
- printk("nxt2002: Waiting for firmware upload (%s)...\n", NXT2002_DEFAULT_FIRMWARE);
- ret = state->config->request_firmware(fe, &fw, NXT2002_DEFAULT_FIRMWARE);
- printk("nxt2002: Waiting for firmware upload(2)...\n");
- if (ret) {
- printk("nxt2002: no firmware upload (timeout or file not found?)\n");
- return ret;
- }
-
- ret = nxt2002_load_firmware(fe, fw);
- if (ret) {
- printk("nxt2002: writing firmware to device failed\n");
- release_firmware(fw);
- return ret;
- }
- printk("nxt2002: firmware upload complete\n");
-
- /* Put the micro into reset */
- nxt2002_microcontroller_stop(state);
-
- /* ensure transfer is complete */
- buf[0]=0;
- i2c_writebytes(state,0x2B,buf,1);
-
- /* Put the micro into reset for real this time */
- nxt2002_microcontroller_stop(state);
-
- /* soft reset everything (agc,frontend,eq,fec)*/
- buf[0] = 0x0F;
- i2c_writebytes(state,0x08,buf,1);
- buf[0] = 0x00;
- i2c_writebytes(state,0x08,buf,1);
-
- /* write agc sdm configure */
- buf[0] = 0xF1;
- i2c_writebytes(state,0x57,buf,1);
-
- /* write mod output format */
- buf[0] = 0x20;
- i2c_writebytes(state,0x09,buf,1);
-
- /* write fec mpeg mode */
- buf[0] = 0x7E;
- buf[1] = 0x00;
- i2c_writebytes(state,0xE9,buf,2);
-
- /* write mux selection */
- buf[0] = 0x00;
- i2c_writebytes(state,0xCC,buf,1);
-
- state->initialised = 1;
- }
-
- return 0;
-}
-
-static int nxt2002_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
-{
- fesettings->min_delay_ms = 500;
- fesettings->step_size = 0;
- fesettings->max_drift = 0;
- return 0;
-}
-
-static void nxt2002_release(struct dvb_frontend* fe)
-{
- struct nxt2002_state* state = fe->demodulator_priv;
- kfree(state);
-}
-
-static struct dvb_frontend_ops nxt2002_ops;
-
-struct dvb_frontend* nxt2002_attach(const struct nxt2002_config* config,
- struct i2c_adapter* i2c)
-{
- struct nxt2002_state* state = NULL;
- u8 buf [] = {0,0,0,0,0};
-
- /* allocate memory for the internal state */
- state = kmalloc(sizeof(struct nxt2002_state), GFP_KERNEL);
- if (state == NULL) goto error;
-
- /* setup the state */
- state->config = config;
- state->i2c = i2c;
- memcpy(&state->ops, &nxt2002_ops, sizeof(struct dvb_frontend_ops));
- state->initialised = 0;
-
- /* Check the first 5 registers to ensure this a revision we can handle */
-
- i2c_readbytes(state, 0x00, buf, 5);
- if (buf[0] != 0x04) goto error; /* device id */
- if (buf[1] != 0x02) goto error; /* fab id */
- if (buf[2] != 0x11) goto error; /* month */
- if (buf[3] != 0x20) goto error; /* year msb */
- if (buf[4] != 0x00) goto error; /* year lsb */
-
- /* 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 nxt2002_ops = {
-
- .info = {
- .name = "Nextwave nxt2002 VSB/QAM frontend",
- .type = FE_ATSC,
- .frequency_min = 54000000,
- .frequency_max = 860000000,
- /* stepsize is just a guess */
- .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_8VSB | FE_CAN_QAM_64 | FE_CAN_QAM_256
- },
-
- .release = nxt2002_release,
-
- .init = nxt2002_init,
- .sleep = nxt2002_sleep,
-
- .set_frontend = nxt2002_setup_frontend_parameters,
- .get_tune_settings = nxt2002_get_tune_settings,
-
- .read_status = nxt2002_read_status,
- .read_ber = nxt2002_read_ber,
- .read_signal_strength = nxt2002_read_signal_strength,
- .read_snr = nxt2002_read_snr,
- .read_ucblocks = nxt2002_read_ucblocks,
-
-};
-
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
-
-MODULE_DESCRIPTION("NXT2002 ATSC (8VSB & ITU J83 AnnexB FEC QAM64/256) demodulator driver");
-MODULE_AUTHOR("Taylor Jacob");
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(nxt2002_attach);
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff