--- /dev/null
+/*
+ Driver for Silicon Labs Si2161 DVB-T and Si2165 DVB-C/-T Demodulator
+
+ Copyright (C) 2013-2014 Matthias Schwarzott <zzam@gentoo.org>
+
+ 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.
+
+ References:
+ http://www.silabs.com/Support%20Documents/TechnicalDocs/Si2165-short.pdf
+*/
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+
+#include "dvb_frontend.h"
+#include "dvb_math.h"
+#include "si2165_priv.h"
+#include "si2165.h"
+
+/* Hauppauge WinTV-HVR-930C-HD B130 / PCTV QuatroStick 521e 1113xx
+ * uses 16 MHz xtal */
+
+/* Hauppauge WinTV-HVR-930C-HD B131 / PCTV QuatroStick 522e 1114xx
+ * uses 24 MHz clock provided by tuner */
+
+struct si2165_state {
+ struct i2c_adapter *i2c;
+
+ struct dvb_frontend frontend;
+
+ struct si2165_config config;
+
+ u8 chip_revcode;
+ u8 chip_type;
+
+ /* calculated by xtal and div settings */
+ u32 fvco_hz;
+ u32 sys_clk;
+ u32 adc_clk;
+
+ bool has_dvbc;
+ bool has_dvbt;
+ bool firmware_loaded;
+};
+
+#define DEBUG_OTHER 0x01
+#define DEBUG_I2C_WRITE 0x02
+#define DEBUG_I2C_READ 0x04
+#define DEBUG_REG_READ 0x08
+#define DEBUG_REG_WRITE 0x10
+#define DEBUG_FW_LOAD 0x20
+
+static int debug = 0x00;
+
+#define dprintk(args...) \
+ do { \
+ if (debug & DEBUG_OTHER) \
+ printk(KERN_DEBUG "si2165: " args); \
+ } while (0)
+
+#define deb_i2c_write(args...) \
+ do { \
+ if (debug & DEBUG_I2C_WRITE) \
+ printk(KERN_DEBUG "si2165: i2c write: " args); \
+ } while (0)
+
+#define deb_i2c_read(args...) \
+ do { \
+ if (debug & DEBUG_I2C_READ) \
+ printk(KERN_DEBUG "si2165: i2c read: " args); \
+ } while (0)
+
+#define deb_readreg(args...) \
+ do { \
+ if (debug & DEBUG_REG_READ) \
+ printk(KERN_DEBUG "si2165: reg read: " args); \
+ } while (0)
+
+#define deb_writereg(args...) \
+ do { \
+ if (debug & DEBUG_REG_WRITE) \
+ printk(KERN_DEBUG "si2165: reg write: " args); \
+ } while (0)
+
+#define deb_fw_load(args...) \
+ do { \
+ if (debug & DEBUG_FW_LOAD) \
+ printk(KERN_DEBUG "si2165: fw load: " args); \
+ } while (0)
+
+static int si2165_write(struct si2165_state *state, const u16 reg,
+ const u8 *src, const int count)
+{
+ int ret;
+ struct i2c_msg msg;
+ u8 buf[2 + 4]; /* write a maximum of 4 bytes of data */
+
+ if (count + 2 > sizeof(buf)) {
+ dev_warn(&state->i2c->dev,
+ "%s: i2c wr reg=%04x: count=%d is too big!\n",
+ KBUILD_MODNAME, reg, count);
+ return -EINVAL;
+ }
+ buf[0] = reg >> 8;
+ buf[1] = reg & 0xff;
+ memcpy(buf + 2, src, count);
+
+ msg.addr = state->config.i2c_addr;
+ msg.flags = 0;
+ msg.buf = buf;
+ msg.len = count + 2;
+
+ if (debug & DEBUG_I2C_WRITE)
+ deb_i2c_write("reg: 0x%04x, data: %*ph\n", reg, count, src);
+
+ ret = i2c_transfer(state->i2c, &msg, 1);
+
+ if (ret != 1) {
+ dev_err(&state->i2c->dev, "%s: ret == %d\n", __func__, ret);
+ if (ret < 0)
+ return ret;
+ else
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static int si2165_read(struct si2165_state *state,
+ const u16 reg, u8 *val, const int count)
+{
+ int ret;
+ u8 reg_buf[] = { reg >> 8, reg & 0xff };
+ struct i2c_msg msg[] = {
+ { .addr = state->config.i2c_addr,
+ .flags = 0, .buf = reg_buf, .len = 2 },
+ { .addr = state->config.i2c_addr,
+ .flags = I2C_M_RD, .buf = val, .len = count },
+ };
+
+ ret = i2c_transfer(state->i2c, msg, 2);
+
+ if (ret != 2) {
+ dev_err(&state->i2c->dev, "%s: error (addr %02x reg %04x error (ret == %i)\n",
+ __func__, state->config.i2c_addr, reg, ret);
+ if (ret < 0)
+ return ret;
+ else
+ return -EREMOTEIO;
+ }
+
+ if (debug & DEBUG_I2C_READ)
+ deb_i2c_read("reg: 0x%04x, data: %*ph\n", reg, count, val);
+
+ return 0;
+}
+
+static int si2165_readreg8(struct si2165_state *state,
+ const u16 reg, u8 *val)
+{
+ int ret;
+
+ ret = si2165_read(state, reg, val, 1);
+ deb_readreg("R(0x%04x)=0x%02x\n", reg, *val);
+ return ret;
+}
+
+static int si2165_readreg16(struct si2165_state *state,
+ const u16 reg, u16 *val)
+{
+ u8 buf[2];
+
+ int ret = si2165_read(state, reg, buf, 2);
+ *val = buf[0] | buf[1] << 8;
+ deb_readreg("R(0x%04x)=0x%04x\n", reg, *val);
+ return ret;
+}
+
+static int si2165_writereg8(struct si2165_state *state, const u16 reg, u8 val)
+{
+ return si2165_write(state, reg, &val, 1);
+}
+
+static int si2165_writereg16(struct si2165_state *state, const u16 reg, u16 val)
+{
+ u8 buf[2] = { val & 0xff, (val >> 8) & 0xff };
+
+ return si2165_write(state, reg, buf, 2);
+}
+
+static int si2165_writereg24(struct si2165_state *state, const u16 reg, u32 val)
+{
+ u8 buf[3] = { val & 0xff, (val >> 8) & 0xff, (val >> 16) & 0xff };
+
+ return si2165_write(state, reg, buf, 3);
+}
+
+static int si2165_writereg32(struct si2165_state *state, const u16 reg, u32 val)
+{
+ u8 buf[4] = {
+ val & 0xff,
+ (val >> 8) & 0xff,
+ (val >> 16) & 0xff,
+ (val >> 24) & 0xff
+ };
+ return si2165_write(state, reg, buf, 4);
+}
+
+static int si2165_writereg_mask8(struct si2165_state *state, const u16 reg,
+ u8 val, u8 mask)
+{
+ int ret;
+ u8 tmp;
+
+ if (mask != 0xff) {
+ ret = si2165_readreg8(state, reg, &tmp);
+ if (ret < 0)
+ goto err;
+
+ val &= mask;
+ tmp &= ~mask;
+ val |= tmp;
+ }
+
+ ret = si2165_writereg8(state, reg, val);
+err:
+ return ret;
+}
+
+static int si2165_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings *s)
+{
+ s->min_delay_ms = 1000;
+ return 0;
+}
+
+static int si2165_init_pll(struct si2165_state *state)
+{
+ u32 ref_freq_Hz = state->config.ref_freq_Hz;
+ u8 divr = 1; /* 1..7 */
+ u8 divp = 1; /* only 1 or 4 */
+ u8 divn = 56; /* 1..63 */
+ u8 divm = 8;
+ u8 divl = 12;
+ u8 buf[4];
+
+ /* hardcoded values can be deleted if calculation is verified
+ * or it yields the same values as the windows driver */
+ switch (ref_freq_Hz) {
+ case 16000000u:
+ divn = 56;
+ break;
+ case 24000000u:
+ divr = 2;
+ divp = 4;
+ divn = 19;
+ break;
+ default:
+ /* ref_freq / divr must be between 4 and 16 MHz */
+ if (ref_freq_Hz > 16000000u)
+ divr = 2;
+
+ /* now select divn and divp such that
+ * fvco is in 1624..1824 MHz */
+ if (1624000000u * divr > ref_freq_Hz * 2u * 63u)
+ divp = 4;
+
+ /* is this already correct regarding rounding? */
+ divn = 1624000000u * divr / (ref_freq_Hz * 2u * divp);
+ break;
+ }
+
+ /* adc_clk and sys_clk depend on xtal and pll settings */
+ state->fvco_hz = ref_freq_Hz / divr
+ * 2u * divn * divp;
+ state->adc_clk = state->fvco_hz / (divm * 4u);
+ state->sys_clk = state->fvco_hz / (divl * 2u);
+
+ /* write pll registers 0x00a0..0x00a3 at once */
+ buf[0] = divl;
+ buf[1] = divm;
+ buf[2] = (divn & 0x3f) | ((divp == 1) ? 0x40 : 0x00) | 0x80;
+ buf[3] = divr;
+ return si2165_write(state, 0x00a0, buf, 4);
+}
+
+static int si2165_adjust_pll_divl(struct si2165_state *state, u8 divl)
+{
+ state->sys_clk = state->fvco_hz / (divl * 2u);
+ return si2165_writereg8(state, 0x00a0, divl); /* pll_divl */
+}
+
+static u32 si2165_get_fe_clk(struct si2165_state *state)
+{
+ /* assume Oversampling mode Ovr4 is used */
+ return state->adc_clk;
+}
+
+static int si2165_wait_init_done(struct si2165_state *state)
+{
+ int ret = -EINVAL;
+ u8 val = 0;
+ int i;
+
+ for (i = 0; i < 3; ++i) {
+ si2165_readreg8(state, 0x0054, &val);
+ if (val == 0x01)
+ return 0;
+ usleep_range(1000, 50000);
+ }
+ dev_err(&state->i2c->dev, "%s: init_done was not set\n",
+ KBUILD_MODNAME);
+ return ret;
+}
+
+static int si2165_upload_firmware_block(struct si2165_state *state,
+ const u8 *data, u32 len, u32 *poffset, u32 block_count)
+{
+ int ret;
+ u8 buf_ctrl[4] = { 0x00, 0x00, 0x00, 0xc0 };
+ u8 wordcount;
+ u32 cur_block = 0;
+ u32 offset = poffset ? *poffset : 0;
+
+ if (len < 4)
+ return -EINVAL;
+ if (len % 4 != 0)
+ return -EINVAL;
+
+ deb_fw_load("si2165_upload_firmware_block called with len=0x%x offset=0x%x blockcount=0x%x\n",
+ len, offset, block_count);
+ while (offset+12 <= len && cur_block < block_count) {
+ deb_fw_load("si2165_upload_firmware_block in while len=0x%x offset=0x%x cur_block=0x%x blockcount=0x%x\n",
+ len, offset, cur_block, block_count);
+ wordcount = data[offset];
+ if (wordcount < 1 || data[offset+1] ||
+ data[offset+2] || data[offset+3]) {
+ dev_warn(&state->i2c->dev,
+ "%s: bad fw data[0..3] = %*ph\n",
+ KBUILD_MODNAME, 4, data);
+ return -EINVAL;
+ }
+
+ if (offset + 8 + wordcount * 4 > len) {
+ dev_warn(&state->i2c->dev,
+ "%s: len is too small for block len=%d, wordcount=%d\n",
+ KBUILD_MODNAME, len, wordcount);
+ return -EINVAL;
+ }
+
+ buf_ctrl[0] = wordcount - 1;
+
+ ret = si2165_write(state, 0x0364, buf_ctrl, 4);
+ if (ret < 0)
+ goto error;
+ ret = si2165_write(state, 0x0368, data+offset+4, 4);
+ if (ret < 0)
+ goto error;
+
+ offset += 8;
+
+ while (wordcount > 0) {
+ ret = si2165_write(state, 0x36c, data+offset, 4);
+ if (ret < 0)
+ goto error;
+ wordcount--;
+ offset += 4;
+ }
+ cur_block++;
+ }
+
+ deb_fw_load("si2165_upload_firmware_block after while len=0x%x offset=0x%x cur_block=0x%x blockcount=0x%x\n",
+ len, offset, cur_block, block_count);
+
+ if (poffset)
+ *poffset = offset;
+
+ deb_fw_load("si2165_upload_firmware_block returned offset=0x%x\n",
+ offset);
+
+ return 0;
+error:
+ return ret;
+}
+
+static int si2165_upload_firmware(struct si2165_state *state)
+{
+ /* int ret; */
+ u8 val[3];
+ u16 val16;
+ int ret;
+
+ const struct firmware *fw = NULL;
+ u8 *fw_file;
+ const u8 *data;
+ u32 len;
+ u32 offset;
+ u8 patch_version;
+ u8 block_count;
+ u16 crc_expected;
+
+ switch (state->chip_revcode) {
+ case 0x03: /* revision D */
+ fw_file = SI2165_FIRMWARE_REV_D;
+ break;
+ default:
+ dev_info(&state->i2c->dev, "%s: no firmware file for revision=%d\n",
+ KBUILD_MODNAME, state->chip_revcode);
+ return 0;
+ }
+
+ /* request the firmware, this will block and timeout */
+ ret = request_firmware(&fw, fw_file, state->i2c->dev.parent);
+ if (ret) {
+ dev_warn(&state->i2c->dev, "%s: firmware file '%s' not found\n",
+ KBUILD_MODNAME, fw_file);
+ goto error;
+ }
+
+ data = fw->data;
+ len = fw->size;
+
+ dev_info(&state->i2c->dev, "%s: downloading firmware from file '%s' size=%d\n",
+ KBUILD_MODNAME, fw_file, len);
+
+ if (len % 4 != 0) {
+ dev_warn(&state->i2c->dev, "%s: firmware size is not multiple of 4\n",
+ KBUILD_MODNAME);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* check header (8 bytes) */
+ if (len < 8) {
+ dev_warn(&state->i2c->dev, "%s: firmware header is missing\n",
+ KBUILD_MODNAME);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ if (data[0] != 1 || data[1] != 0) {
+ dev_warn(&state->i2c->dev, "%s: firmware file version is wrong\n",
+ KBUILD_MODNAME);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ patch_version = data[2];
+ block_count = data[4];
+ crc_expected = data[7] << 8 | data[6];
+
+ /* start uploading fw */
+ /* boot/wdog status */
+ ret = si2165_writereg8(state, 0x0341, 0x00);
+ if (ret < 0)
+ goto error;
+ /* reset */
+ ret = si2165_writereg8(state, 0x00c0, 0x00);
+ if (ret < 0)
+ goto error;
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, 0x0341, val);
+ if (ret < 0)
+ goto error;
+
+ /* enable reset on error */
+ ret = si2165_readreg8(state, 0x035c, val);
+ if (ret < 0)
+ goto error;
+ ret = si2165_readreg8(state, 0x035c, val);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x035c, 0x02);
+ if (ret < 0)
+ goto error;
+
+ /* start right after the header */
+ offset = 8;
+
+ dev_info(&state->i2c->dev, "%s: si2165_upload_firmware extracted patch_version=0x%02x, block_count=0x%02x, crc_expected=0x%04x\n",
+ KBUILD_MODNAME, patch_version, block_count, crc_expected);
+
+ ret = si2165_upload_firmware_block(state, data, len, &offset, 1);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_writereg8(state, 0x0344, patch_version);
+ if (ret < 0)
+ goto error;
+
+ /* reset crc */
+ ret = si2165_writereg8(state, 0x0379, 0x01);
+ if (ret)
+ goto error;
+
+ ret = si2165_upload_firmware_block(state, data, len,
+ &offset, block_count);
+ if (ret < 0) {
+ dev_err(&state->i2c->dev,
+ "%s: firmare could not be uploaded\n",
+ KBUILD_MODNAME);
+ goto error;
+ }
+
+ /* read crc */
+ ret = si2165_readreg16(state, 0x037a, &val16);
+ if (ret)
+ goto error;
+
+ if (val16 != crc_expected) {
+ dev_err(&state->i2c->dev,
+ "%s: firmware crc mismatch %04x != %04x\n",
+ KBUILD_MODNAME, val16, crc_expected);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ ret = si2165_upload_firmware_block(state, data, len, &offset, 5);
+ if (ret)
+ goto error;
+
+ if (len != offset) {
+ dev_err(&state->i2c->dev,
+ "%s: firmare len mismatch %04x != %04x\n",
+ KBUILD_MODNAME, len, offset);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* reset watchdog error register */
+ ret = si2165_writereg_mask8(state, 0x0341, 0x02, 0x02);
+ if (ret < 0)
+ goto error;
+
+ /* enable reset on error */
+ ret = si2165_writereg_mask8(state, 0x035c, 0x01, 0x01);
+ if (ret < 0)
+ goto error;
+
+ dev_info(&state->i2c->dev, "%s: fw load finished\n", KBUILD_MODNAME);
+
+ ret = 0;
+ state->firmware_loaded = true;
+error:
+ if (fw) {
+ release_firmware(fw);
+ fw = NULL;
+ }
+
+ return ret;
+}
+
+static int si2165_init(struct dvb_frontend *fe)
+{
+ int ret = 0;
+ struct si2165_state *state = fe->demodulator_priv;
+ u8 val;
+ u8 patch_version = 0x00;
+
+ dprintk("%s: called\n", __func__);
+
+ /* powerup */
+ ret = si2165_writereg8(state, 0x0000, state->config.chip_mode);
+ if (ret < 0)
+ goto error;
+ /* dsp_clock_enable */
+ ret = si2165_writereg8(state, 0x0104, 0x01);
+ if (ret < 0)
+ goto error;
+ ret = si2165_readreg8(state, 0x0000, &val); /* verify chip_mode */
+ if (ret < 0)
+ goto error;
+ if (val != state->config.chip_mode) {
+ dev_err(&state->i2c->dev, "%s: could not set chip_mode\n",
+ KBUILD_MODNAME);
+ return -EINVAL;
+ }
+
+ /* agc */
+ ret = si2165_writereg8(state, 0x018b, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x0190, 0x01);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x0170, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x0171, 0x07);
+ if (ret < 0)
+ goto error;
+ /* rssi pad */
+ ret = si2165_writereg8(state, 0x0646, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x0641, 0x00);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_init_pll(state);
+ if (ret < 0)
+ goto error;
+
+ /* enable chip_init */
+ ret = si2165_writereg8(state, 0x0050, 0x01);
+ if (ret < 0)
+ goto error;
+ /* set start_init */
+ ret = si2165_writereg8(state, 0x0096, 0x01);
+ if (ret < 0)
+ goto error;
+ ret = si2165_wait_init_done(state);
+ if (ret < 0)
+ goto error;
+
+ /* disable chip_init */
+ ret = si2165_writereg8(state, 0x0050, 0x00);
+ if (ret < 0)
+ goto error;
+
+ /* ber_pkt */
+ ret = si2165_writereg16(state, 0x0470 , 0x7530);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_readreg8(state, 0x0344, &patch_version);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_writereg8(state, 0x00cb, 0x00);
+ if (ret < 0)
+ goto error;
+
+ /* dsp_addr_jump */
+ ret = si2165_writereg32(state, 0x0348, 0xf4000000);
+ if (ret < 0)
+ goto error;
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, 0x0341, &val);
+ if (ret < 0)
+ goto error;
+
+ if (patch_version == 0x00) {
+ ret = si2165_upload_firmware(state);
+ if (ret < 0)
+ goto error;
+ }
+
+ /* write adc values after each reset*/
+ ret = si2165_writereg8(state, 0x012a, 0x46);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x012c, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x012e, 0x0a);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x012f, 0xff);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, 0x0123, 0x70);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+error:
+ return ret;
+}
+
+static int si2165_sleep(struct dvb_frontend *fe)
+{
+ int ret;
+ struct si2165_state *state = fe->demodulator_priv;
+
+ /* dsp clock disable */
+ ret = si2165_writereg8(state, 0x0104, 0x00);
+ if (ret < 0)
+ return ret;
+ /* chip mode */
+ ret = si2165_writereg8(state, 0x0000, SI2165_MODE_OFF);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int si2165_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ int ret;
+ u8 fec_lock = 0;
+ struct si2165_state *state = fe->demodulator_priv;
+
+ if (!state->has_dvbt)
+ return -EINVAL;
+
+ /* check fec_lock */
+ ret = si2165_readreg8(state, 0x4e0, &fec_lock);
+ if (ret < 0)
+ return ret;
+ *status = 0;
+ if (fec_lock & 0x01) {
+ *status |= FE_HAS_SIGNAL;
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_VITERBI;
+ *status |= FE_HAS_SYNC;
+ *status |= FE_HAS_LOCK;
+ }
+
+ return 0;
+}
+
+static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)
+{
+ u64 oversamp;
+ u32 reg_value;
+
+ oversamp = si2165_get_fe_clk(state);
+ oversamp <<= 23;
+ do_div(oversamp, dvb_rate);
+ reg_value = oversamp & 0x3fffffff;
+
+ /* oversamp, usbdump contained 0x03100000; */
+ return si2165_writereg32(state, 0x00e4, reg_value);
+}
+
+static int si2165_set_if_freq_shift(struct si2165_state *state, u32 IF)
+{
+ u64 if_freq_shift;
+ s32 reg_value = 0;
+ u32 fe_clk = si2165_get_fe_clk(state);
+
+ if_freq_shift = IF;
+ if_freq_shift <<= 29;
+
+ do_div(if_freq_shift, fe_clk);
+ reg_value = (s32)if_freq_shift;
+
+ if (state->config.inversion)
+ reg_value = -reg_value;
+
+ reg_value = reg_value & 0x1fffffff;
+
+ /* if_freq_shift, usbdump contained 0x023ee08f; */
+ return si2165_writereg32(state, 0x00e8, reg_value);
+}
+
+static int si2165_set_parameters(struct dvb_frontend *fe)
+{
+ int ret;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct si2165_state *state = fe->demodulator_priv;
+ u8 val[3];
+ u32 IF;
+ u32 dvb_rate = 0;
+ u16 bw10k;
+
+ dprintk("%s: called\n", __func__);
+
+ if (!fe->ops.tuner_ops.get_if_frequency) {
+ dev_err(&state->i2c->dev,
+ "%s: Error: get_if_frequency() not defined at tuner. Can't work without it!\n",
+ KBUILD_MODNAME);
+ return -EINVAL;
+ }
+
+ if (!state->has_dvbt)
+ return -EINVAL;
+
+ if (p->bandwidth_hz > 0) {
+ dvb_rate = p->bandwidth_hz * 8 / 7;
+ bw10k = p->bandwidth_hz / 10000;
+ } else {
+ dvb_rate = 8 * 8 / 7;
+ bw10k = 800;
+ }
+
+ /* standard = DVB-T */
+ ret = si2165_writereg8(state, 0x00ec, 0x01);
+ if (ret < 0)
+ return ret;
+ ret = si2165_adjust_pll_divl(state, 12);
+ if (ret < 0)
+ return ret;
+
+ fe->ops.tuner_ops.get_if_frequency(fe, &IF);
+ ret = si2165_set_if_freq_shift(state, IF);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x08f8, 0x00);
+ if (ret < 0)
+ return ret;
+ /* ts output config */
+ ret = si2165_writereg8(state, 0x04e4, 0x20);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg16(state, 0x04ef, 0x00fe);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg24(state, 0x04f4, 0x555555);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x04e5, 0x01);
+ if (ret < 0)
+ return ret;
+ /* bandwidth in 10KHz steps */
+ ret = si2165_writereg16(state, 0x0308, bw10k);
+ if (ret < 0)
+ return ret;
+ ret = si2165_set_oversamp(state, dvb_rate);
+ if (ret < 0)
+ return ret;
+ /* impulsive_noise_remover */
+ ret = si2165_writereg8(state, 0x031c, 0x01);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x00cb, 0x00);
+ if (ret < 0)
+ return ret;
+ /* agc2 */
+ ret = si2165_writereg8(state, 0x016e, 0x41);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x016c, 0x0e);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x016d, 0x10);
+ if (ret < 0)
+ return ret;
+ /* agc */
+ ret = si2165_writereg8(state, 0x015b, 0x03);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x0150, 0x78);
+ if (ret < 0)
+ return ret;
+ /* agc */
+ ret = si2165_writereg8(state, 0x01a0, 0x78);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x01c8, 0x68);
+ if (ret < 0)
+ return ret;
+ /* freq_sync_range */
+ ret = si2165_writereg16(state, 0x030c, 0x0064);
+ if (ret < 0)
+ return ret;
+ /* gp_reg0 */
+ ret = si2165_readreg8(state, 0x0387, val);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x0387, 0x00);
+ if (ret < 0)
+ return ret;
+ /* dsp_addr_jump */
+ ret = si2165_writereg32(state, 0x0348, 0xf4000000);
+ if (ret < 0)
+ return ret;
+
+ if (fe->ops.tuner_ops.set_params)
+ fe->ops.tuner_ops.set_params(fe);
+
+ /* recalc if_freq_shift if IF might has changed */
+ fe->ops.tuner_ops.get_if_frequency(fe, &IF);
+ ret = si2165_set_if_freq_shift(state, IF);
+ if (ret < 0)
+ return ret;
+
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, 0x0341, val);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, 0x0341, 0x00);
+ if (ret < 0)
+ return ret;
+ /* reset all */
+ ret = si2165_writereg8(state, 0x00c0, 0x00);
+ if (ret < 0)
+ return ret;
+ /* gp_reg0 */
+ ret = si2165_writereg32(state, 0x0384, 0x00000000);
+ if (ret < 0)
+ return ret;
+ /* start_synchro */
+ ret = si2165_writereg8(state, 0x02e0, 0x01);
+ if (ret < 0)
+ return ret;
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, 0x0341, val);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static void si2165_release(struct dvb_frontend *fe)
+{
+ struct si2165_state *state = fe->demodulator_priv;
+
+ dprintk("%s: called\n", __func__);
+ kfree(state);
+}
+
+static struct dvb_frontend_ops si2165_ops = {
+ .info = {
+ .name = "Silicon Labs ",
+ .caps = FE_CAN_FEC_1_2 |
+ FE_CAN_FEC_2_3 |
+ FE_CAN_FEC_3_4 |
+ FE_CAN_FEC_5_6 |
+ FE_CAN_FEC_7_8 |
+ FE_CAN_FEC_AUTO |
+ FE_CAN_QPSK |
+ FE_CAN_QAM_16 |
+ FE_CAN_QAM_32 |
+ FE_CAN_QAM_64 |
+ FE_CAN_QAM_128 |
+ FE_CAN_QAM_256 |
+ FE_CAN_QAM_AUTO |
+ FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_GUARD_INTERVAL_AUTO |
+ FE_CAN_HIERARCHY_AUTO |
+ FE_CAN_MUTE_TS |
+ FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_RECOVER
+ },
+
+ .get_tune_settings = si2165_get_tune_settings,
+
+ .init = si2165_init,
+ .sleep = si2165_sleep,
+
+ .set_frontend = si2165_set_parameters,
+ .read_status = si2165_read_status,
+
+ .release = si2165_release,
+};
+
+struct dvb_frontend *si2165_attach(const struct si2165_config *config,
+ struct i2c_adapter *i2c)
+{
+ struct si2165_state *state = NULL;
+ int n;
+ int io_ret;
+ u8 val;
+ char rev_char;
+ const char *chip_name;
+
+ if (config == NULL || i2c == NULL)
+ goto error;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct si2165_state), GFP_KERNEL);
+ if (state == NULL)
+ goto error;
+
+ /* setup the state */
+ state->i2c = i2c;
+ state->config = *config;
+
+ if (state->config.ref_freq_Hz < 4000000
+ || state->config.ref_freq_Hz > 27000000) {
+ dev_err(&state->i2c->dev, "%s: ref_freq of %d Hz not supported by this driver\n",
+ KBUILD_MODNAME, state->config.ref_freq_Hz);
+ goto error;
+ }
+
+ /* create dvb_frontend */
+ memcpy(&state->frontend.ops, &si2165_ops,
+ sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+
+ /* powerup */
+ io_ret = si2165_writereg8(state, 0x0000, state->config.chip_mode);
+ if (io_ret < 0)
+ goto error;
+
+ io_ret = si2165_readreg8(state, 0x0000, &val);
+ if (io_ret < 0)
+ goto error;
+ if (val != state->config.chip_mode)
+ goto error;
+
+ io_ret = si2165_readreg8(state, 0x0023, &state->chip_revcode);
+ if (io_ret < 0)
+ goto error;
+
+ io_ret = si2165_readreg8(state, 0x0118, &state->chip_type);
+ if (io_ret < 0)
+ goto error;
+
+ /* powerdown */
+ io_ret = si2165_writereg8(state, 0x0000, SI2165_MODE_OFF);
+ if (io_ret < 0)
+ goto error;
+
+ if (state->chip_revcode < 26)
+ rev_char = 'A' + state->chip_revcode;
+ else
+ rev_char = '?';
+
+ switch (state->chip_type) {
+ case 0x06:
+ chip_name = "Si2161";
+ state->has_dvbt = true;
+ break;
+ case 0x07:
+ chip_name = "Si2165";
+ state->has_dvbt = true;
+ state->has_dvbc = true;
+ break;
+ default:
+ dev_err(&state->i2c->dev, "%s: Unsupported Silicon Labs chip (type %d, rev %d)\n",
+ KBUILD_MODNAME, state->chip_type, state->chip_revcode);
+ goto error;
+ }
+
+ dev_info(&state->i2c->dev,
+ "%s: Detected Silicon Labs %s-%c (type %d, rev %d)\n",
+ KBUILD_MODNAME, chip_name, rev_char, state->chip_type,
+ state->chip_revcode);
+
+ strlcat(state->frontend.ops.info.name, chip_name,
+ sizeof(state->frontend.ops.info.name));
+
+ n = 0;
+ if (state->has_dvbt) {
+ state->frontend.ops.delsys[n++] = SYS_DVBT;
+ strlcat(state->frontend.ops.info.name, " DVB-T",
+ sizeof(state->frontend.ops.info.name));
+ }
+ if (state->has_dvbc)
+ dev_warn(&state->i2c->dev, "%s: DVB-C is not yet supported.\n",
+ KBUILD_MODNAME);
+
+ return &state->frontend;
+
+error:
+ kfree(state);
+ return NULL;
+}
+EXPORT_SYMBOL(si2165_attach);
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Silicon Labs Si2165 DVB-C/-T Demodulator driver");
+MODULE_AUTHOR("Matthias Schwarzott <zzam@gentoo.org>");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(SI2165_FIRMWARE_REV_D);
Code Review / kvmfornfv.git / blobdiff