--- /dev/null
+/*
+ * 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>
+ *
+ * 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.
+ *
+*/
+
+/*
+ * 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>/Documentation/dvb/get_dvb_firmware nxt2002" or
+ * "<kerneldir>/Documentation/dvb/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 "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 mutli 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;
+ break;
+ }
+
+ /* 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;
+ break;
+ }
+
+ 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 mutli 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;
+ 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 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;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+}
+
+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;
+ break;
+ }
+ 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;
+ break;
+ }
+
+ 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;
+ break;
+ }
+ 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;
+ break;
+ }
+ 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;
+ break;
+ }
+
+ /* 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;
+ break;
+ }
+ 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;
+ break;
+ }
+
+ /* 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;
+ break;
+ }
+
+ /* 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;
+ break;
+ }
+ 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;
+ break;
+ }
+
+ /* 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, fe_status_t* 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;
+ break;
+ }
+ 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 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 struct dvb_frontend_ops nxt200x_ops = {
+ .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
+ .info = {
+ .name = "Nextwave NXT200X VSB/QAM frontend",
+ .frequency_min = 54000000,
+ .frequency_max = 860000000,
+ .frequency_stepsize = 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(nxt200x_attach);
+
Code Review / kvmfornfv.git / blobdiff