diff options
Diffstat (limited to 'drivers/media/dvb-frontends/nxt200x.c')
| -rw-r--r-- | drivers/media/dvb-frontends/nxt200x.c | 1220 |
1 files changed, 1220 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/nxt200x.c b/drivers/media/dvb-frontends/nxt200x.c new file mode 100644 index 0000000000..1c549ada6e --- /dev/null +++ b/drivers/media/dvb-frontends/nxt200x.c @@ -0,0 +1,1220 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Support for NXT2002 and NXT2004 - VSB/QAM + * + * Copyright (C) 2005 Kirk Lapray <kirk.lapray@gmail.com> + * Copyright (C) 2006-2014 Michael Krufky <mkrufky@linuxtv.org> + * based on nxt2002 by Taylor Jacob <rtjacob@earthlink.net> + * and nxt2004 by Jean-Francois Thibert <jeanfrancois@sagetv.com> +*/ + +/* + * NOTES ABOUT THIS DRIVER + * + * This Linux driver supports: + * B2C2/BBTI Technisat Air2PC - ATSC (NXT2002) + * AverTVHD MCE A180 (NXT2004) + * ATI HDTV Wonder (NXT2004) + * + * This driver needs external firmware. Please use the command + * "<kerneldir>/scripts/get_dvb_firmware nxt2002" or + * "<kerneldir>/scripts/get_dvb_firmware nxt2004" to + * download/extract the appropriate firmware, and then copy it to + * /usr/lib/hotplug/firmware/ or /lib/firmware/ + * (depending on configuration of firmware hotplug). + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 256 + +#define NXT2002_DEFAULT_FIRMWARE "dvb-fe-nxt2002.fw" +#define NXT2004_DEFAULT_FIRMWARE "dvb-fe-nxt2004.fw" +#define CRC_CCIT_MASK 0x1021 + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/string.h> + +#include <media/dvb_frontend.h> +#include "nxt200x.h" + +struct nxt200x_state { + + struct i2c_adapter* i2c; + const struct nxt200x_config* config; + struct dvb_frontend frontend; + + /* demodulator private data */ + nxt_chip_type demod_chip; + u8 initialised:1; +}; + +static int debug; +#define dprintk(args...) do { if (debug) pr_debug(args); } while (0) + +static int i2c_writebytes (struct nxt200x_state* state, u8 addr, u8 *buf, u8 len) +{ + int err; + struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = len }; + + if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { + pr_warn("%s: i2c write error (addr 0x%02x, err == %i)\n", + __func__, addr, err); + return -EREMOTEIO; + } + return 0; +} + +static int i2c_readbytes(struct nxt200x_state *state, u8 addr, u8 *buf, u8 len) +{ + int err; + struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD, .buf = buf, .len = len }; + + if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { + pr_warn("%s: i2c read error (addr 0x%02x, err == %i)\n", + __func__, addr, err); + return -EREMOTEIO; + } + return 0; +} + +static int nxt200x_writebytes (struct nxt200x_state* state, u8 reg, + const u8 *buf, u8 len) +{ + u8 buf2[MAX_XFER_SIZE]; + int err; + struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf2, .len = len + 1 }; + + if (1 + len > sizeof(buf2)) { + pr_warn("%s: i2c wr reg=%04x: len=%d is too big!\n", + __func__, reg, len); + return -EINVAL; + } + + buf2[0] = reg; + memcpy(&buf2[1], buf, len); + + if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { + pr_warn("%s: i2c write error (addr 0x%02x, err == %i)\n", + __func__, state->config->demod_address, err); + return -EREMOTEIO; + } + return 0; +} + +static int nxt200x_readbytes(struct nxt200x_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) { + pr_warn("%s: i2c read error (addr 0x%02x, err == %i)\n", + __func__, state->config->demod_address, err); + return -EREMOTEIO; + } + return 0; +} + +static u16 nxt200x_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 nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8* data, u8 len) +{ + u8 attr, len2, buf; + dprintk("%s\n", __func__); + + /* set multi register register */ + nxt200x_writebytes(state, 0x35, ®, 1); + + /* send the actual data */ + nxt200x_writebytes(state, 0x36, data, len); + + switch (state->demod_chip) { + case NXT2002: + len2 = len; + buf = 0x02; + break; + case NXT2004: + /* probably not right, but gives correct values */ + attr = 0x02; + if (reg & 0x80) { + attr = attr << 1; + if (reg & 0x04) + attr = attr >> 1; + } + /* set write bit */ + len2 = ((attr << 4) | 0x10) | len; + buf = 0x80; + break; + default: + return -EINVAL; + } + + /* set multi register length */ + nxt200x_writebytes(state, 0x34, &len2, 1); + + /* toggle the multireg write bit */ + nxt200x_writebytes(state, 0x21, &buf, 1); + + nxt200x_readbytes(state, 0x21, &buf, 1); + + switch (state->demod_chip) { + case NXT2002: + if ((buf & 0x02) == 0) + return 0; + break; + case NXT2004: + if (buf == 0) + return 0; + break; + default: + return -EINVAL; + } + + pr_warn("Error writing multireg register 0x%02X\n", reg); + + return 0; +} + +static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* data, u8 len) +{ + int i; + u8 buf, len2, attr; + dprintk("%s\n", __func__); + + /* set multi register register */ + nxt200x_writebytes(state, 0x35, ®, 1); + + switch (state->demod_chip) { + case NXT2002: + /* set multi register length */ + len2 = len & 0x80; + nxt200x_writebytes(state, 0x34, &len2, 1); + + /* read the actual data */ + nxt200x_readbytes(state, reg, data, len); + return 0; + case NXT2004: + /* probably not right, but gives correct values */ + attr = 0x02; + if (reg & 0x80) { + attr = attr << 1; + if (reg & 0x04) + attr = attr >> 1; + } + + /* set multi register length */ + len2 = (attr << 4) | len; + nxt200x_writebytes(state, 0x34, &len2, 1); + + /* toggle the multireg bit*/ + buf = 0x80; + nxt200x_writebytes(state, 0x21, &buf, 1); + + /* read the actual data */ + for(i = 0; i < len; i++) { + nxt200x_readbytes(state, 0x36 + i, &data[i], 1); + } + return 0; + default: + return -EINVAL; + } +} + +static void nxt200x_microcontroller_stop (struct nxt200x_state* state) +{ + u8 buf, stopval, counter = 0; + dprintk("%s\n", __func__); + + /* set correct stop value */ + switch (state->demod_chip) { + case NXT2002: + stopval = 0x40; + break; + case NXT2004: + stopval = 0x10; + break; + default: + stopval = 0; + break; + } + + buf = 0x80; + nxt200x_writebytes(state, 0x22, &buf, 1); + + while (counter < 20) { + nxt200x_readbytes(state, 0x31, &buf, 1); + if (buf & stopval) + return; + msleep(10); + counter++; + } + + pr_warn("Timeout waiting for nxt200x to stop. This is ok after firmware upload.\n"); + return; +} + +static void nxt200x_microcontroller_start (struct nxt200x_state* state) +{ + u8 buf; + dprintk("%s\n", __func__); + + buf = 0x00; + nxt200x_writebytes(state, 0x22, &buf, 1); +} + +static void nxt2004_microcontroller_init (struct nxt200x_state* state) +{ + u8 buf[9]; + u8 counter = 0; + dprintk("%s\n", __func__); + + buf[0] = 0x00; + nxt200x_writebytes(state, 0x2b, buf, 1); + buf[0] = 0x70; + nxt200x_writebytes(state, 0x34, buf, 1); + buf[0] = 0x04; + nxt200x_writebytes(state, 0x35, buf, 1); + buf[0] = 0x01; buf[1] = 0x23; buf[2] = 0x45; buf[3] = 0x67; buf[4] = 0x89; + buf[5] = 0xAB; buf[6] = 0xCD; buf[7] = 0xEF; buf[8] = 0xC0; + nxt200x_writebytes(state, 0x36, buf, 9); + buf[0] = 0x80; + nxt200x_writebytes(state, 0x21, buf, 1); + + while (counter < 20) { + nxt200x_readbytes(state, 0x21, buf, 1); + if (buf[0] == 0) + return; + msleep(10); + counter++; + } + + pr_warn("Timeout waiting for nxt2004 to init.\n"); + + return; +} + +static int nxt200x_writetuner (struct nxt200x_state* state, u8* data) +{ + u8 buf, count = 0; + + dprintk("%s\n", __func__); + + dprintk("Tuner Bytes: %*ph\n", 4, data + 1); + + /* if NXT2004, write directly to tuner. if NXT2002, write through NXT chip. + * direct write is required for Philips TUV1236D and ALPS TDHU2 */ + switch (state->demod_chip) { + case NXT2004: + if (i2c_writebytes(state, data[0], data+1, 4)) + pr_warn("error writing to tuner\n"); + /* wait until we have a lock */ + while (count < 20) { + i2c_readbytes(state, data[0], &buf, 1); + if (buf & 0x40) + return 0; + msleep(100); + count++; + } + pr_warn("timeout waiting for tuner lock\n"); + break; + case NXT2002: + /* set the i2c transfer speed to the tuner */ + buf = 0x03; + nxt200x_writebytes(state, 0x20, &buf, 1); + + /* setup to transfer 4 bytes via i2c */ + buf = 0x04; + nxt200x_writebytes(state, 0x34, &buf, 1); + + /* write actual tuner bytes */ + nxt200x_writebytes(state, 0x36, data+1, 4); + + /* set tuner i2c address */ + buf = data[0] << 1; + nxt200x_writebytes(state, 0x35, &buf, 1); + + /* write UC Opmode to begin transfer */ + buf = 0x80; + nxt200x_writebytes(state, 0x21, &buf, 1); + + while (count < 20) { + nxt200x_readbytes(state, 0x21, &buf, 1); + if ((buf & 0x80)== 0x00) + return 0; + msleep(100); + count++; + } + pr_warn("timeout error writing to tuner\n"); + break; + default: + return -EINVAL; + } + return 0; +} + +static void nxt200x_agc_reset(struct nxt200x_state* state) +{ + u8 buf; + dprintk("%s\n", __func__); + + switch (state->demod_chip) { + case NXT2002: + buf = 0x08; + nxt200x_writebytes(state, 0x08, &buf, 1); + buf = 0x00; + nxt200x_writebytes(state, 0x08, &buf, 1); + break; + case NXT2004: + nxt200x_readreg_multibyte(state, 0x08, &buf, 1); + buf = 0x08; + nxt200x_writereg_multibyte(state, 0x08, &buf, 1); + buf = 0x00; + nxt200x_writereg_multibyte(state, 0x08, &buf, 1); + break; + default: + break; + } + return; +} + +static int nxt2002_load_firmware (struct dvb_frontend* fe, const struct firmware *fw) +{ + + struct nxt200x_state* state = fe->demodulator_priv; + u8 buf[3], written = 0, chunkpos = 0; + u16 rambase, position, crc = 0; + + dprintk("%s\n", __func__); + dprintk("Firmware is %zu bytes\n", fw->size); + + /* Get the RAM base for this nxt2002 */ + nxt200x_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; + nxt200x_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 */ + nxt200x_writebytes(state, 0x29, buf, 3); + } + written++; + chunkpos++; + + if ((written % 4) == 0) + nxt200x_writebytes(state, chunkpos, &fw->data[position-3], 4); + + crc = nxt200x_crc(crc, fw->data[position]); + + if ((written == 255) || (position+1 == fw->size)) { + /* write remaining bytes of firmware */ + nxt200x_writebytes(state, chunkpos+4-(written %4), + &fw->data[position-(written %4) + 1], + written %4); + buf[0] = crc << 8; + buf[1] = crc & 0xFF; + + /* write crc */ + nxt200x_writebytes(state, 0x2C, buf, 2); + + /* do a read to stop things */ + nxt200x_readbytes(state, 0x2A, buf, 1); + + /* set transfer mode to complete */ + buf[0] = 0x80; + nxt200x_writebytes(state, 0x2B, buf, 1); + + written = 0; + } + } + + return 0; +}; + +static int nxt2004_load_firmware (struct dvb_frontend* fe, const struct firmware *fw) +{ + + struct nxt200x_state* state = fe->demodulator_priv; + u8 buf[3]; + u16 rambase, position, crc=0; + + dprintk("%s\n", __func__); + dprintk("Firmware is %zu bytes\n", fw->size); + + /* set rambase */ + rambase = 0x1000; + + /* hold the micro in reset while loading firmware */ + buf[0] = 0x80; + nxt200x_writebytes(state, 0x2B, buf,1); + + /* calculate firmware CRC */ + for (position = 0; position < fw->size; position++) { + crc = nxt200x_crc(crc, fw->data[position]); + } + + buf[0] = rambase >> 8; + buf[1] = rambase & 0xFF; + buf[2] = 0x81; + /* write starting address */ + nxt200x_writebytes(state,0x29,buf,3); + + for (position = 0; position < fw->size;) { + nxt200x_writebytes(state, 0x2C, &fw->data[position], + fw->size-position > 255 ? 255 : fw->size-position); + position += (fw->size-position > 255 ? 255 : fw->size-position); + } + buf[0] = crc >> 8; + buf[1] = crc & 0xFF; + + dprintk("firmware crc is 0x%02X 0x%02X\n", buf[0], buf[1]); + + /* write crc */ + nxt200x_writebytes(state, 0x2C, buf,2); + + /* do a read to stop things */ + nxt200x_readbytes(state, 0x2C, buf, 1); + + /* set transfer mode to complete */ + buf[0] = 0x80; + nxt200x_writebytes(state, 0x2B, buf,1); + + return 0; +}; + +static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct nxt200x_state* state = fe->demodulator_priv; + u8 buf[5]; + + /* stop the micro first */ + nxt200x_microcontroller_stop(state); + + if (state->demod_chip == NXT2004) { + /* make sure demod is set to digital */ + buf[0] = 0x04; + nxt200x_writebytes(state, 0x14, buf, 1); + buf[0] = 0x00; + nxt200x_writebytes(state, 0x17, buf, 1); + } + + /* set additional params */ + switch (p->modulation) { + case QAM_64: + case QAM_256: + /* Set punctured clock for QAM */ + /* This is just a guess since I am unable to test it */ + if (state->config->set_ts_params) + state->config->set_ts_params(fe, 1); + break; + case VSB_8: + /* Set non-punctured clock for VSB */ + if (state->config->set_ts_params) + state->config->set_ts_params(fe, 0); + break; + default: + return -EINVAL; + } + + if (fe->ops.tuner_ops.calc_regs) { + /* get tuning information */ + fe->ops.tuner_ops.calc_regs(fe, buf, 5); + + /* write frequency information */ + nxt200x_writetuner(state, buf); + } + + /* reset the agc now that tuning has been completed */ + nxt200x_agc_reset(state); + + /* set target power level */ + switch (p->modulation) { + case QAM_64: + case QAM_256: + buf[0] = 0x74; + break; + case VSB_8: + buf[0] = 0x70; + break; + default: + return -EINVAL; + } + nxt200x_writebytes(state, 0x42, buf, 1); + + /* configure sdm */ + switch (state->demod_chip) { + case NXT2002: + buf[0] = 0x87; + break; + case NXT2004: + buf[0] = 0x07; + break; + default: + return -EINVAL; + } + nxt200x_writebytes(state, 0x57, buf, 1); + + /* write sdm1 input */ + buf[0] = 0x10; + buf[1] = 0x00; + switch (state->demod_chip) { + case NXT2002: + nxt200x_writereg_multibyte(state, 0x58, buf, 2); + break; + case NXT2004: + nxt200x_writebytes(state, 0x58, buf, 2); + break; + default: + return -EINVAL; + } + + /* write sdmx input */ + switch (p->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; + } + buf[1] = 0x00; + switch (state->demod_chip) { + case NXT2002: + nxt200x_writereg_multibyte(state, 0x5C, buf, 2); + break; + case NXT2004: + nxt200x_writebytes(state, 0x5C, buf, 2); + break; + default: + return -EINVAL; + } + + /* write adc power lpf fc */ + buf[0] = 0x05; + nxt200x_writebytes(state, 0x43, buf, 1); + + if (state->demod_chip == NXT2004) { + /* write ??? */ + buf[0] = 0x00; + buf[1] = 0x00; + nxt200x_writebytes(state, 0x46, buf, 2); + } + + /* write accumulator2 input */ + buf[0] = 0x80; + buf[1] = 0x00; + switch (state->demod_chip) { + case NXT2002: + nxt200x_writereg_multibyte(state, 0x4B, buf, 2); + break; + case NXT2004: + nxt200x_writebytes(state, 0x4B, buf, 2); + break; + default: + return -EINVAL; + } + + /* write kg1 */ + buf[0] = 0x00; + nxt200x_writebytes(state, 0x4D, buf, 1); + + /* write sdm12 lpf fc */ + buf[0] = 0x44; + nxt200x_writebytes(state, 0x55, buf, 1); + + /* write agc control reg */ + buf[0] = 0x04; + nxt200x_writebytes(state, 0x41, buf, 1); + + if (state->demod_chip == NXT2004) { + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x24; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + + /* soft reset? */ + nxt200x_readreg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x10; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + nxt200x_readreg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x04; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x81, buf, 1); + buf[0] = 0x80; buf[1] = 0x00; buf[2] = 0x00; + nxt200x_writereg_multibyte(state, 0x82, buf, 3); + nxt200x_readreg_multibyte(state, 0x88, buf, 1); + buf[0] = 0x11; + nxt200x_writereg_multibyte(state, 0x88, buf, 1); + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x44; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + } + + /* write agc ucgp0 */ + switch (p->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; + } + nxt200x_writebytes(state, 0x30, buf, 1); + + /* write agc control reg */ + buf[0] = 0x00; + nxt200x_writebytes(state, 0x41, buf, 1); + + /* write accumulator2 input */ + buf[0] = 0x80; + buf[1] = 0x00; + switch (state->demod_chip) { + case NXT2002: + nxt200x_writereg_multibyte(state, 0x49, buf, 2); + nxt200x_writereg_multibyte(state, 0x4B, buf, 2); + break; + case NXT2004: + nxt200x_writebytes(state, 0x49, buf, 2); + nxt200x_writebytes(state, 0x4B, buf, 2); + break; + default: + return -EINVAL; + } + + /* write agc control reg */ + buf[0] = 0x04; + nxt200x_writebytes(state, 0x41, buf, 1); + + nxt200x_microcontroller_start(state); + + if (state->demod_chip == NXT2004) { + nxt2004_microcontroller_init(state); + + /* ???? */ + buf[0] = 0xF0; + buf[1] = 0x00; + nxt200x_writebytes(state, 0x5C, buf, 2); + } + + /* 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 nxt200x_read_status(struct dvb_frontend *fe, enum fe_status *status) +{ + struct nxt200x_state* state = fe->demodulator_priv; + u8 lock; + nxt200x_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 nxt200x_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct nxt200x_state* state = fe->demodulator_priv; + u8 b[3]; + + nxt200x_readreg_multibyte(state, 0xE6, b, 3); + + *ber = ((b[0] << 8) + b[1]) * 8; + + return 0; +} + +static int nxt200x_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct nxt200x_state* state = fe->demodulator_priv; + u8 b[2]; + u16 temp = 0; + + /* setup to read cluster variance */ + b[0] = 0x00; + nxt200x_writebytes(state, 0xA1, b, 1); + + /* get multreg val */ + nxt200x_readreg_multibyte(state, 0xA6, b, 2); + + temp = (b[0] << 8) | b[1]; + *strength = ((0x7FFF - temp) & 0x0FFF) * 16; + + return 0; +} + +static int nxt200x_read_snr(struct dvb_frontend* fe, u16* snr) +{ + + struct nxt200x_state* state = fe->demodulator_priv; + u8 b[2]; + u16 temp = 0, temp2; + u32 snrdb = 0; + + /* setup to read cluster variance */ + b[0] = 0x00; + nxt200x_writebytes(state, 0xA1, b, 1); + + /* get multreg val from 0xA6 */ + nxt200x_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 nxt200x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct nxt200x_state* state = fe->demodulator_priv; + u8 b[3]; + + nxt200x_readreg_multibyte(state, 0xE6, b, 3); + *ucblocks = b[2]; + + return 0; +} + +static int nxt200x_sleep(struct dvb_frontend* fe) +{ + return 0; +} + +static int nxt2002_init(struct dvb_frontend* fe) +{ + struct nxt200x_state* state = fe->demodulator_priv; + const struct firmware *fw; + int ret; + u8 buf[2]; + + /* request the firmware, this will block until someone uploads it */ + pr_debug("%s: Waiting for firmware upload (%s)...\n", + __func__, NXT2002_DEFAULT_FIRMWARE); + ret = request_firmware(&fw, NXT2002_DEFAULT_FIRMWARE, + state->i2c->dev.parent); + pr_debug("%s: Waiting for firmware upload(2)...\n", __func__); + if (ret) { + pr_err("%s: No firmware uploaded (timeout or file not found?)\n", + __func__); + return ret; + } + + ret = nxt2002_load_firmware(fe, fw); + release_firmware(fw); + if (ret) { + pr_err("%s: Writing firmware to device failed\n", __func__); + return ret; + } + pr_info("%s: Firmware upload complete\n", __func__); + + /* Put the micro into reset */ + nxt200x_microcontroller_stop(state); + + /* ensure transfer is complete */ + buf[0]=0x00; + nxt200x_writebytes(state, 0x2B, buf, 1); + + /* Put the micro into reset for real this time */ + nxt200x_microcontroller_stop(state); + + /* soft reset everything (agc,frontend,eq,fec)*/ + buf[0] = 0x0F; + nxt200x_writebytes(state, 0x08, buf, 1); + buf[0] = 0x00; + nxt200x_writebytes(state, 0x08, buf, 1); + + /* write agc sdm configure */ + buf[0] = 0xF1; + nxt200x_writebytes(state, 0x57, buf, 1); + + /* write mod output format */ + buf[0] = 0x20; + nxt200x_writebytes(state, 0x09, buf, 1); + + /* write fec mpeg mode */ + buf[0] = 0x7E; + buf[1] = 0x00; + nxt200x_writebytes(state, 0xE9, buf, 2); + + /* write mux selection */ + buf[0] = 0x00; + nxt200x_writebytes(state, 0xCC, buf, 1); + + return 0; +} + +static int nxt2004_init(struct dvb_frontend* fe) +{ + struct nxt200x_state* state = fe->demodulator_priv; + const struct firmware *fw; + int ret; + u8 buf[3]; + + /* ??? */ + buf[0]=0x00; + nxt200x_writebytes(state, 0x1E, buf, 1); + + /* request the firmware, this will block until someone uploads it */ + pr_debug("%s: Waiting for firmware upload (%s)...\n", + __func__, NXT2004_DEFAULT_FIRMWARE); + ret = request_firmware(&fw, NXT2004_DEFAULT_FIRMWARE, + state->i2c->dev.parent); + pr_debug("%s: Waiting for firmware upload(2)...\n", __func__); + if (ret) { + pr_err("%s: No firmware uploaded (timeout or file not found?)\n", + __func__); + return ret; + } + + ret = nxt2004_load_firmware(fe, fw); + release_firmware(fw); + if (ret) { + pr_err("%s: Writing firmware to device failed\n", __func__); + return ret; + } + pr_info("%s: Firmware upload complete\n", __func__); + + /* ensure transfer is complete */ + buf[0] = 0x01; + nxt200x_writebytes(state, 0x19, buf, 1); + + nxt2004_microcontroller_init(state); + nxt200x_microcontroller_stop(state); + nxt200x_microcontroller_stop(state); + nxt2004_microcontroller_init(state); + nxt200x_microcontroller_stop(state); + + /* soft reset everything (agc,frontend,eq,fec)*/ + buf[0] = 0xFF; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + + /* write agc sdm configure */ + buf[0] = 0xD7; + nxt200x_writebytes(state, 0x57, buf, 1); + + /* ???*/ + buf[0] = 0x07; + buf[1] = 0xfe; + nxt200x_writebytes(state, 0x35, buf, 2); + buf[0] = 0x12; + nxt200x_writebytes(state, 0x34, buf, 1); + buf[0] = 0x80; + nxt200x_writebytes(state, 0x21, buf, 1); + + /* ???*/ + buf[0] = 0x21; + nxt200x_writebytes(state, 0x0A, buf, 1); + + /* ???*/ + buf[0] = 0x01; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + + /* write fec mpeg mode */ + buf[0] = 0x7E; + buf[1] = 0x00; + nxt200x_writebytes(state, 0xE9, buf, 2); + + /* write mux selection */ + buf[0] = 0x00; + nxt200x_writebytes(state, 0xCC, buf, 1); + + /* ???*/ + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + + /* soft reset? */ + nxt200x_readreg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x10; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + nxt200x_readreg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + + /* ???*/ + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x01; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x70; + nxt200x_writereg_multibyte(state, 0x81, buf, 1); + buf[0] = 0x31; buf[1] = 0x5E; buf[2] = 0x66; + nxt200x_writereg_multibyte(state, 0x82, buf, 3); + + nxt200x_readreg_multibyte(state, 0x88, buf, 1); + buf[0] = 0x11; + nxt200x_writereg_multibyte(state, 0x88, buf, 1); + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x40; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + + nxt200x_readbytes(state, 0x10, buf, 1); + buf[0] = 0x10; + nxt200x_writebytes(state, 0x10, buf, 1); + nxt200x_readbytes(state, 0x0A, buf, 1); + buf[0] = 0x21; + nxt200x_writebytes(state, 0x0A, buf, 1); + + nxt2004_microcontroller_init(state); + + buf[0] = 0x21; + nxt200x_writebytes(state, 0x0A, buf, 1); + buf[0] = 0x7E; + nxt200x_writebytes(state, 0xE9, buf, 1); + buf[0] = 0x00; + nxt200x_writebytes(state, 0xEA, buf, 1); + + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + + /* soft reset? */ + nxt200x_readreg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x10; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + nxt200x_readreg_multibyte(state, 0x08, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x08, buf, 1); + + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x04; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x00; + nxt200x_writereg_multibyte(state, 0x81, buf, 1); + buf[0] = 0x80; buf[1] = 0x00; buf[2] = 0x00; + nxt200x_writereg_multibyte(state, 0x82, buf, 3); + + nxt200x_readreg_multibyte(state, 0x88, buf, 1); + buf[0] = 0x11; + nxt200x_writereg_multibyte(state, 0x88, buf, 1); + + nxt200x_readreg_multibyte(state, 0x80, buf, 1); + buf[0] = 0x44; + nxt200x_writereg_multibyte(state, 0x80, buf, 1); + + /* initialize tuner */ + nxt200x_readbytes(state, 0x10, buf, 1); + buf[0] = 0x12; + nxt200x_writebytes(state, 0x10, buf, 1); + buf[0] = 0x04; + nxt200x_writebytes(state, 0x13, buf, 1); + buf[0] = 0x00; + nxt200x_writebytes(state, 0x16, buf, 1); + buf[0] = 0x04; + nxt200x_writebytes(state, 0x14, buf, 1); + buf[0] = 0x00; + nxt200x_writebytes(state, 0x14, buf, 1); + nxt200x_writebytes(state, 0x17, buf, 1); + nxt200x_writebytes(state, 0x14, buf, 1); + nxt200x_writebytes(state, 0x17, buf, 1); + + return 0; +} + +static int nxt200x_init(struct dvb_frontend* fe) +{ + struct nxt200x_state* state = fe->demodulator_priv; + int ret = 0; + + if (!state->initialised) { + switch (state->demod_chip) { + case NXT2002: + ret = nxt2002_init(fe); + break; + case NXT2004: + ret = nxt2004_init(fe); + break; + default: + return -EINVAL; + } + state->initialised = 1; + } + return ret; +} + +static int nxt200x_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 nxt200x_release(struct dvb_frontend* fe) +{ + struct nxt200x_state* state = fe->demodulator_priv; + kfree(state); +} + +static const struct dvb_frontend_ops nxt200x_ops; + +struct dvb_frontend* nxt200x_attach(const struct nxt200x_config* config, + struct i2c_adapter* i2c) +{ + struct nxt200x_state* state = NULL; + u8 buf [] = {0,0,0,0,0}; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct nxt200x_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + state->initialised = 0; + + /* read card id */ + nxt200x_readbytes(state, 0x00, buf, 5); + dprintk("NXT info: %*ph\n", 5, buf); + + /* set demod chip */ + switch (buf[0]) { + case 0x04: + state->demod_chip = NXT2002; + pr_info("NXT2002 Detected\n"); + break; + case 0x05: + state->demod_chip = NXT2004; + pr_info("NXT2004 Detected\n"); + break; + default: + goto error; + } + + /* make sure demod chip is supported */ + switch (state->demod_chip) { + case NXT2002: + 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 */ + break; + case NXT2004: + if (buf[0] != 0x05) goto error; /* device id */ + break; + default: + goto error; + } + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &nxt200x_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + pr_err("Unknown/Unsupported NXT chip: %*ph\n", 5, buf); + return NULL; +} + +static const struct dvb_frontend_ops nxt200x_ops = { + .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, + .info = { + .name = "Nextwave NXT200X VSB/QAM frontend", + .frequency_min_hz = 54 * MHz, + .frequency_max_hz = 860 * MHz, + .frequency_stepsize_hz = 166666, /* stepsize is just a guess */ + .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 = nxt200x_release, + + .init = nxt200x_init, + .sleep = nxt200x_sleep, + + .set_frontend = nxt200x_setup_frontend_parameters, + .get_tune_settings = nxt200x_get_tune_settings, + + .read_status = nxt200x_read_status, + .read_ber = nxt200x_read_ber, + .read_signal_strength = nxt200x_read_signal_strength, + .read_snr = nxt200x_read_snr, + .read_ucblocks = nxt200x_read_ucblocks, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("NXT200X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver"); +MODULE_AUTHOR("Kirk Lapray, Michael Krufky, Jean-Francois Thibert, and Taylor Jacob"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL_GPL(nxt200x_attach); + |