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path: root/drivers/media/dvb-frontends/si2165.c
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Diffstat (limited to 'drivers/media/dvb-frontends/si2165.c')
-rw-r--r--drivers/media/dvb-frontends/si2165.c1317
1 files changed, 1317 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/si2165.c b/drivers/media/dvb-frontends/si2165.c
new file mode 100644
index 000000000..d55d8f169
--- /dev/null
+++ b/drivers/media/dvb-frontends/si2165.c
@@ -0,0 +1,1317 @@
+/*
+ * Driver for Silicon Labs Si2161 DVB-T and Si2165 DVB-C/-T Demodulator
+ *
+ * Copyright (C) 2013-2017 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 <linux/regmap.h>
+
+#include <media/dvb_frontend.h>
+#include <media/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_client *client;
+
+ struct regmap *regmap;
+
+ struct dvb_frontend fe;
+
+ 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;
+
+ /* DVBv3 stats */
+ u64 ber_prev;
+
+ bool has_dvbc;
+ bool has_dvbt;
+ bool firmware_loaded;
+};
+
+static int si2165_write(struct si2165_state *state, const u16 reg,
+ const u8 *src, const int count)
+{
+ int ret;
+
+ dev_dbg(&state->client->dev, "i2c write: reg: 0x%04x, data: %*ph\n",
+ reg, count, src);
+
+ ret = regmap_bulk_write(state->regmap, reg, src, count);
+
+ if (ret)
+ dev_err(&state->client->dev, "%s: ret == %d\n", __func__, ret);
+
+ return ret;
+}
+
+static int si2165_read(struct si2165_state *state,
+ const u16 reg, u8 *val, const int count)
+{
+ int ret = regmap_bulk_read(state->regmap, reg, val, count);
+
+ if (ret) {
+ dev_err(&state->client->dev, "%s: error (addr %02x reg %04x error (ret == %i)\n",
+ __func__, state->config.i2c_addr, reg, ret);
+ return ret;
+ }
+
+ dev_dbg(&state->client->dev, "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)
+{
+ unsigned int val_tmp;
+ int ret = regmap_read(state->regmap, reg, &val_tmp);
+ *val = (u8)val_tmp;
+ dev_dbg(&state->client->dev, "reg read: 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;
+ dev_dbg(&state->client->dev, "reg read: R(0x%04x)=0x%04x\n", reg, *val);
+ return ret;
+}
+
+static int si2165_readreg24(struct si2165_state *state,
+ const u16 reg, u32 *val)
+{
+ u8 buf[3];
+
+ int ret = si2165_read(state, reg, buf, 3);
+ *val = buf[0] | buf[1] << 8 | buf[2] << 16;
+ dev_dbg(&state->client->dev, "reg read: R(0x%04x)=0x%06x\n", reg, *val);
+ return ret;
+}
+
+static int si2165_writereg8(struct si2165_state *state, const u16 reg, u8 val)
+{
+ return regmap_write(state->regmap, reg, val);
+}
+
+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)
+{
+ if (mask != 0xff) {
+ u8 tmp;
+ int ret = si2165_readreg8(state, reg, &tmp);
+
+ if (ret < 0)
+ return ret;
+
+ val &= mask;
+ tmp &= ~mask;
+ val |= tmp;
+ }
+ return si2165_writereg8(state, reg, val);
+}
+
+#define REG16(reg, val) \
+ { (reg), (val) & 0xff }, \
+ { (reg) + 1, (val) >> 8 & 0xff }
+struct si2165_reg_value_pair {
+ u16 reg;
+ u8 val;
+};
+
+static int si2165_write_reg_list(struct si2165_state *state,
+ const struct si2165_reg_value_pair *regs,
+ int count)
+{
+ int i;
+ int ret;
+
+ for (i = 0; i < count; i++) {
+ ret = si2165_writereg8(state, regs[i].reg, regs[i].val);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+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 all 4 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, REG_PLL_DIVL, 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, REG_PLL_DIVL, 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;
+ u8 val = 0;
+ int i;
+
+ for (i = 0; i < 3; ++i) {
+ ret = si2165_readreg8(state, REG_INIT_DONE, &val);
+ if (ret < 0)
+ return ret;
+ if (val == 0x01)
+ return 0;
+ usleep_range(1000, 50000);
+ }
+ dev_err(&state->client->dev, "init_done was not set\n");
+ return -EINVAL;
+}
+
+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;
+
+ dev_dbg(&state->client->dev,
+ "fw load: %s: called with len=0x%x offset=0x%x blockcount=0x%x\n",
+ __func__, len, offset, block_count);
+ while (offset + 12 <= len && cur_block < block_count) {
+ dev_dbg(&state->client->dev,
+ "fw load: %s: in while len=0x%x offset=0x%x cur_block=0x%x blockcount=0x%x\n",
+ __func__, len, offset, cur_block, block_count);
+ wordcount = data[offset];
+ if (wordcount < 1 || data[offset + 1] ||
+ data[offset + 2] || data[offset + 3]) {
+ dev_warn(&state->client->dev,
+ "bad fw data[0..3] = %*ph\n",
+ 4, data);
+ return -EINVAL;
+ }
+
+ if (offset + 8 + wordcount * 4 > len) {
+ dev_warn(&state->client->dev,
+ "len is too small for block len=%d, wordcount=%d\n",
+ len, wordcount);
+ return -EINVAL;
+ }
+
+ buf_ctrl[0] = wordcount - 1;
+
+ ret = si2165_write(state, REG_DCOM_CONTROL_BYTE, buf_ctrl, 4);
+ if (ret < 0)
+ goto error;
+ ret = si2165_write(state, REG_DCOM_ADDR, data + offset + 4, 4);
+ if (ret < 0)
+ goto error;
+
+ offset += 8;
+
+ while (wordcount > 0) {
+ ret = si2165_write(state, REG_DCOM_DATA,
+ data + offset, 4);
+ if (ret < 0)
+ goto error;
+ wordcount--;
+ offset += 4;
+ }
+ cur_block++;
+ }
+
+ dev_dbg(&state->client->dev,
+ "fw load: %s: after while len=0x%x offset=0x%x cur_block=0x%x blockcount=0x%x\n",
+ __func__, len, offset, cur_block, block_count);
+
+ if (poffset)
+ *poffset = offset;
+
+ dev_dbg(&state->client->dev,
+ "fw load: %s: returned offset=0x%x\n",
+ __func__, 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->client->dev, "no firmware file for revision=%d\n",
+ state->chip_revcode);
+ return 0;
+ }
+
+ /* request the firmware, this will block and timeout */
+ ret = request_firmware(&fw, fw_file, &state->client->dev);
+ if (ret) {
+ dev_warn(&state->client->dev, "firmware file '%s' not found\n",
+ fw_file);
+ goto error;
+ }
+
+ data = fw->data;
+ len = fw->size;
+
+ dev_info(&state->client->dev, "downloading firmware from file '%s' size=%d\n",
+ fw_file, len);
+
+ if (len % 4 != 0) {
+ dev_warn(&state->client->dev, "firmware size is not multiple of 4\n");
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* check header (8 bytes) */
+ if (len < 8) {
+ dev_warn(&state->client->dev, "firmware header is missing\n");
+ ret = -EINVAL;
+ goto error;
+ }
+
+ if (data[0] != 1 || data[1] != 0) {
+ dev_warn(&state->client->dev, "firmware file version is wrong\n");
+ 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, REG_WDOG_AND_BOOT, 0x00);
+ if (ret < 0)
+ goto error;
+ /* reset */
+ ret = si2165_writereg8(state, REG_RST_ALL, 0x00);
+ if (ret < 0)
+ goto error;
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, val);
+ if (ret < 0)
+ goto error;
+
+ /* enable reset on error */
+ ret = si2165_readreg8(state, REG_EN_RST_ERROR, val);
+ if (ret < 0)
+ goto error;
+ ret = si2165_readreg8(state, REG_EN_RST_ERROR, val);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, REG_EN_RST_ERROR, 0x02);
+ if (ret < 0)
+ goto error;
+
+ /* start right after the header */
+ offset = 8;
+
+ dev_info(&state->client->dev, "%s: extracted patch_version=0x%02x, block_count=0x%02x, crc_expected=0x%04x\n",
+ __func__, 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, REG_PATCH_VERSION, patch_version);
+ if (ret < 0)
+ goto error;
+
+ /* reset crc */
+ ret = si2165_writereg8(state, REG_RST_CRC, 0x01);
+ if (ret)
+ goto error;
+
+ ret = si2165_upload_firmware_block(state, data, len,
+ &offset, block_count);
+ if (ret < 0) {
+ dev_err(&state->client->dev,
+ "firmware could not be uploaded\n");
+ goto error;
+ }
+
+ /* read crc */
+ ret = si2165_readreg16(state, REG_CRC, &val16);
+ if (ret)
+ goto error;
+
+ if (val16 != crc_expected) {
+ dev_err(&state->client->dev,
+ "firmware crc mismatch %04x != %04x\n",
+ 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->client->dev,
+ "firmware len mismatch %04x != %04x\n",
+ len, offset);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* reset watchdog error register */
+ ret = si2165_writereg_mask8(state, REG_WDOG_AND_BOOT, 0x02, 0x02);
+ if (ret < 0)
+ goto error;
+
+ /* enable reset on error */
+ ret = si2165_writereg_mask8(state, REG_EN_RST_ERROR, 0x01, 0x01);
+ if (ret < 0)
+ goto error;
+
+ dev_info(&state->client->dev, "fw load finished\n");
+
+ 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;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ u8 val;
+ u8 patch_version = 0x00;
+
+ dev_dbg(&state->client->dev, "%s: called\n", __func__);
+
+ /* powerup */
+ ret = si2165_writereg8(state, REG_CHIP_MODE, state->config.chip_mode);
+ if (ret < 0)
+ goto error;
+ /* dsp_clock_enable */
+ ret = si2165_writereg8(state, REG_DSP_CLOCK, 0x01);
+ if (ret < 0)
+ goto error;
+ /* verify chip_mode */
+ ret = si2165_readreg8(state, REG_CHIP_MODE, &val);
+ if (ret < 0)
+ goto error;
+ if (val != state->config.chip_mode) {
+ dev_err(&state->client->dev, "could not set chip_mode\n");
+ return -EINVAL;
+ }
+
+ /* agc */
+ ret = si2165_writereg8(state, REG_AGC_IF_TRI, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, REG_AGC_IF_SLR, 0x01);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, REG_AGC2_OUTPUT, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, REG_AGC2_CLKDIV, 0x07);
+ if (ret < 0)
+ goto error;
+ /* rssi pad */
+ ret = si2165_writereg8(state, REG_RSSI_PAD_CTRL, 0x00);
+ if (ret < 0)
+ goto error;
+ ret = si2165_writereg8(state, REG_RSSI_ENABLE, 0x00);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_init_pll(state);
+ if (ret < 0)
+ goto error;
+
+ /* enable chip_init */
+ ret = si2165_writereg8(state, REG_CHIP_INIT, 0x01);
+ if (ret < 0)
+ goto error;
+ /* set start_init */
+ ret = si2165_writereg8(state, REG_START_INIT, 0x01);
+ if (ret < 0)
+ goto error;
+ ret = si2165_wait_init_done(state);
+ if (ret < 0)
+ goto error;
+
+ /* disable chip_init */
+ ret = si2165_writereg8(state, REG_CHIP_INIT, 0x00);
+ if (ret < 0)
+ goto error;
+
+ /* ber_pkt - default 65535 */
+ ret = si2165_writereg16(state, REG_BER_PKT,
+ STATISTICS_PERIOD_PKT_COUNT);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_readreg8(state, REG_PATCH_VERSION, &patch_version);
+ if (ret < 0)
+ goto error;
+
+ ret = si2165_writereg8(state, REG_AUTO_RESET, 0x00);
+ if (ret < 0)
+ goto error;
+
+ /* dsp_addr_jump */
+ ret = si2165_writereg32(state, REG_ADDR_JUMP, 0xf4000000);
+ if (ret < 0)
+ goto error;
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, &val);
+ if (ret < 0)
+ goto error;
+
+ if (patch_version == 0x00) {
+ ret = si2165_upload_firmware(state);
+ if (ret < 0)
+ goto error;
+ }
+
+ /* ts output config */
+ ret = si2165_writereg8(state, REG_TS_DATA_MODE, 0x20);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg16(state, REG_TS_TRI, 0x00fe);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg24(state, REG_TS_SLR, 0x555555);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, REG_TS_CLK_MODE, 0x01);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, REG_TS_PARALLEL_MODE, 0x00);
+ if (ret < 0)
+ return ret;
+
+ c = &state->fe.dtv_property_cache;
+ c->cnr.len = 1;
+ c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_error.len = 1;
+ c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_count.len = 1;
+ c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
+ 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, REG_DSP_CLOCK, 0x00);
+ if (ret < 0)
+ return ret;
+ /* chip mode */
+ ret = si2165_writereg8(state, REG_CHIP_MODE, SI2165_MODE_OFF);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+ int ret;
+ u8 u8tmp;
+ u32 u32tmp;
+ struct si2165_state *state = fe->demodulator_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ u32 delsys = c->delivery_system;
+
+ *status = 0;
+
+ switch (delsys) {
+ case SYS_DVBT:
+ /* check fast signal type */
+ ret = si2165_readreg8(state, REG_CHECK_SIGNAL, &u8tmp);
+ if (ret < 0)
+ return ret;
+ switch (u8tmp & 0x3) {
+ case 0: /* searching */
+ case 1: /* nothing */
+ break;
+ case 2: /* digital signal */
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
+ break;
+ }
+ break;
+ case SYS_DVBC_ANNEX_A:
+ /* check packet sync lock */
+ ret = si2165_readreg8(state, REG_PS_LOCK, &u8tmp);
+ if (ret < 0)
+ return ret;
+ if (u8tmp & 0x01) {
+ *status |= FE_HAS_SIGNAL;
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_VITERBI;
+ *status |= FE_HAS_SYNC;
+ }
+ break;
+ }
+
+ /* check fec_lock */
+ ret = si2165_readreg8(state, REG_FEC_LOCK, &u8tmp);
+ if (ret < 0)
+ return ret;
+ if (u8tmp & 0x01) {
+ *status |= FE_HAS_SIGNAL;
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_VITERBI;
+ *status |= FE_HAS_SYNC;
+ *status |= FE_HAS_LOCK;
+ }
+
+ /* CNR */
+ if (delsys == SYS_DVBC_ANNEX_A && *status & FE_HAS_VITERBI) {
+ ret = si2165_readreg24(state, REG_C_N, &u32tmp);
+ if (ret < 0)
+ return ret;
+ /*
+ * svalue =
+ * 1000 * c_n/dB =
+ * 1000 * 10 * log10(2^24 / regval) =
+ * 1000 * 10 * (log10(2^24) - log10(regval)) =
+ * 1000 * 10 * (intlog10(2^24) - intlog10(regval)) / 2^24
+ *
+ * intlog10(x) = log10(x) * 2^24
+ * intlog10(2^24) = log10(2^24) * 2^24 = 121210686
+ */
+ u32tmp = (1000 * 10 * (121210686 - (u64)intlog10(u32tmp)))
+ >> 24;
+ c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+ c->cnr.stat[0].svalue = u32tmp;
+ } else
+ c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
+ /* BER */
+ if (*status & FE_HAS_VITERBI) {
+ if (c->post_bit_error.stat[0].scale == FE_SCALE_NOT_AVAILABLE) {
+ /* start new sampling period to get rid of old data*/
+ ret = si2165_writereg8(state, REG_BER_RST, 0x01);
+ if (ret < 0)
+ return ret;
+
+ /* set scale to enter read code on next call */
+ c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+ c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+ c->post_bit_error.stat[0].uvalue = 0;
+ c->post_bit_count.stat[0].uvalue = 0;
+
+ /*
+ * reset DVBv3 value to deliver a good result
+ * for the first call
+ */
+ state->ber_prev = 0;
+
+ } else {
+ ret = si2165_readreg8(state, REG_BER_AVAIL, &u8tmp);
+ if (ret < 0)
+ return ret;
+
+ if (u8tmp & 1) {
+ u32 biterrcnt;
+
+ ret = si2165_readreg24(state, REG_BER_BIT,
+ &biterrcnt);
+ if (ret < 0)
+ return ret;
+
+ c->post_bit_error.stat[0].uvalue +=
+ biterrcnt;
+ c->post_bit_count.stat[0].uvalue +=
+ STATISTICS_PERIOD_BIT_COUNT;
+
+ /* start new sampling period */
+ ret = si2165_writereg8(state,
+ REG_BER_RST, 0x01);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&state->client->dev,
+ "post_bit_error=%u post_bit_count=%u\n",
+ biterrcnt, STATISTICS_PERIOD_BIT_COUNT);
+ }
+ }
+ } else {
+ c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ }
+
+ return 0;
+}
+
+static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
+ *snr = div_s64(c->cnr.stat[0].svalue, 100);
+ else
+ *snr = 0;
+ return 0;
+}
+
+static int si2165_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ struct si2165_state *state = fe->demodulator_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ if (c->post_bit_error.stat[0].scale != FE_SCALE_COUNTER) {
+ *ber = 0;
+ return 0;
+ }
+
+ *ber = c->post_bit_error.stat[0].uvalue - state->ber_prev;
+ state->ber_prev = c->post_bit_error.stat[0].uvalue;
+
+ return 0;
+}
+
+static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)
+{
+ u64 oversamp;
+ u32 reg_value;
+
+ if (!dvb_rate)
+ return -EINVAL;
+
+ oversamp = si2165_get_fe_clk(state);
+ oversamp <<= 23;
+ do_div(oversamp, dvb_rate);
+ reg_value = oversamp & 0x3fffffff;
+
+ dev_dbg(&state->client->dev, "Write oversamp=%#x\n", reg_value);
+ return si2165_writereg32(state, REG_OVERSAMP, reg_value);
+}
+
+static int si2165_set_if_freq_shift(struct si2165_state *state)
+{
+ struct dvb_frontend *fe = &state->fe;
+ u64 if_freq_shift;
+ s32 reg_value = 0;
+ u32 fe_clk = si2165_get_fe_clk(state);
+ u32 IF = 0;
+
+ if (!fe->ops.tuner_ops.get_if_frequency) {
+ dev_err(&state->client->dev,
+ "Error: get_if_frequency() not defined at tuner. Can't work without it!\n");
+ return -EINVAL;
+ }
+
+ if (!fe_clk)
+ return -EINVAL;
+
+ fe->ops.tuner_ops.get_if_frequency(fe, &IF);
+ 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, REG_IF_FREQ_SHIFT, reg_value);
+}
+
+static const struct si2165_reg_value_pair dvbt_regs[] = {
+ /* standard = DVB-T */
+ { REG_DVB_STANDARD, 0x01 },
+ /* impulsive_noise_remover */
+ { REG_IMPULSIVE_NOISE_REM, 0x01 },
+ { REG_AUTO_RESET, 0x00 },
+ /* agc2 */
+ { REG_AGC2_MIN, 0x41 },
+ { REG_AGC2_KACQ, 0x0e },
+ { REG_AGC2_KLOC, 0x10 },
+ /* agc */
+ { REG_AGC_UNFREEZE_THR, 0x03 },
+ { REG_AGC_CRESTF_DBX8, 0x78 },
+ /* agc */
+ { REG_AAF_CRESTF_DBX8, 0x78 },
+ { REG_ACI_CRESTF_DBX8, 0x68 },
+ /* freq_sync_range */
+ REG16(REG_FREQ_SYNC_RANGE, 0x0064),
+ /* gp_reg0 */
+ { REG_GP_REG0_MSB, 0x00 }
+};
+
+static int si2165_set_frontend_dvbt(struct dvb_frontend *fe)
+{
+ int ret;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct si2165_state *state = fe->demodulator_priv;
+ u32 dvb_rate = 0;
+ u16 bw10k;
+ u32 bw_hz = p->bandwidth_hz;
+
+ dev_dbg(&state->client->dev, "%s: called\n", __func__);
+
+ if (!state->has_dvbt)
+ return -EINVAL;
+
+ /* no bandwidth auto-detection */
+ if (bw_hz == 0)
+ return -EINVAL;
+
+ dvb_rate = bw_hz * 8 / 7;
+ bw10k = bw_hz / 10000;
+
+ ret = si2165_adjust_pll_divl(state, 12);
+ if (ret < 0)
+ return ret;
+
+ /* bandwidth in 10KHz steps */
+ ret = si2165_writereg16(state, REG_T_BANDWIDTH, bw10k);
+ if (ret < 0)
+ return ret;
+ ret = si2165_set_oversamp(state, dvb_rate);
+ if (ret < 0)
+ return ret;
+
+ ret = si2165_write_reg_list(state, dvbt_regs, ARRAY_SIZE(dvbt_regs));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct si2165_reg_value_pair dvbc_regs[] = {
+ /* standard = DVB-C */
+ { REG_DVB_STANDARD, 0x05 },
+
+ /* agc2 */
+ { REG_AGC2_MIN, 0x50 },
+ { REG_AGC2_KACQ, 0x0e },
+ { REG_AGC2_KLOC, 0x10 },
+ /* agc */
+ { REG_AGC_UNFREEZE_THR, 0x03 },
+ { REG_AGC_CRESTF_DBX8, 0x68 },
+ /* agc */
+ { REG_AAF_CRESTF_DBX8, 0x68 },
+ { REG_ACI_CRESTF_DBX8, 0x50 },
+
+ { REG_EQ_AUTO_CONTROL, 0x0d },
+
+ { REG_KP_LOCK, 0x05 },
+ { REG_CENTRAL_TAP, 0x09 },
+ REG16(REG_UNKNOWN_350, 0x3e80),
+
+ { REG_AUTO_RESET, 0x01 },
+ REG16(REG_UNKNOWN_24C, 0x0000),
+ REG16(REG_UNKNOWN_27C, 0x0000),
+ { REG_SWEEP_STEP, 0x03 },
+ { REG_AGC_IF_TRI, 0x00 },
+};
+
+static int si2165_set_frontend_dvbc(struct dvb_frontend *fe)
+{
+ struct si2165_state *state = fe->demodulator_priv;
+ int ret;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ const u32 dvb_rate = p->symbol_rate;
+ u8 u8tmp;
+
+ if (!state->has_dvbc)
+ return -EINVAL;
+
+ if (dvb_rate == 0)
+ return -EINVAL;
+
+ ret = si2165_adjust_pll_divl(state, 14);
+ if (ret < 0)
+ return ret;
+
+ /* Oversampling */
+ ret = si2165_set_oversamp(state, dvb_rate);
+ if (ret < 0)
+ return ret;
+
+ switch (p->modulation) {
+ case QPSK:
+ u8tmp = 0x3;
+ break;
+ case QAM_16:
+ u8tmp = 0x7;
+ break;
+ case QAM_32:
+ u8tmp = 0x8;
+ break;
+ case QAM_64:
+ u8tmp = 0x9;
+ break;
+ case QAM_128:
+ u8tmp = 0xa;
+ break;
+ case QAM_256:
+ default:
+ u8tmp = 0xb;
+ break;
+ }
+ ret = si2165_writereg8(state, REG_REQ_CONSTELLATION, u8tmp);
+ if (ret < 0)
+ return ret;
+
+ ret = si2165_writereg32(state, REG_LOCK_TIMEOUT, 0x007a1200);
+ if (ret < 0)
+ return ret;
+
+ ret = si2165_write_reg_list(state, dvbc_regs, ARRAY_SIZE(dvbc_regs));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct si2165_reg_value_pair adc_rewrite[] = {
+ { REG_ADC_RI1, 0x46 },
+ { REG_ADC_RI3, 0x00 },
+ { REG_ADC_RI5, 0x0a },
+ { REG_ADC_RI6, 0xff },
+ { REG_ADC_RI8, 0x70 }
+};
+
+static int si2165_set_frontend(struct dvb_frontend *fe)
+{
+ struct si2165_state *state = fe->demodulator_priv;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ u32 delsys = p->delivery_system;
+ int ret;
+ u8 val[3];
+
+ /* initial setting of if freq shift */
+ ret = si2165_set_if_freq_shift(state);
+ if (ret < 0)
+ return ret;
+
+ switch (delsys) {
+ case SYS_DVBT:
+ ret = si2165_set_frontend_dvbt(fe);
+ if (ret < 0)
+ return ret;
+ break;
+ case SYS_DVBC_ANNEX_A:
+ ret = si2165_set_frontend_dvbc(fe);
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* dsp_addr_jump */
+ ret = si2165_writereg32(state, REG_ADDR_JUMP, 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 */
+ ret = si2165_set_if_freq_shift(state);
+ if (ret < 0)
+ return ret;
+
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, val);
+ if (ret < 0)
+ return ret;
+ ret = si2165_writereg8(state, REG_WDOG_AND_BOOT, 0x00);
+ if (ret < 0)
+ return ret;
+
+ /* reset all */
+ ret = si2165_writereg8(state, REG_RST_ALL, 0x00);
+ if (ret < 0)
+ return ret;
+ /* gp_reg0 */
+ ret = si2165_writereg32(state, REG_GP_REG0_LSB, 0x00000000);
+ if (ret < 0)
+ return ret;
+
+ /* write adc values after each reset*/
+ ret = si2165_write_reg_list(state, adc_rewrite,
+ ARRAY_SIZE(adc_rewrite));
+ if (ret < 0)
+ return ret;
+
+ /* start_synchro */
+ ret = si2165_writereg8(state, REG_START_SYNCHRO, 0x01);
+ if (ret < 0)
+ return ret;
+ /* boot/wdog status */
+ ret = si2165_readreg8(state, REG_WDOG_AND_BOOT, val);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct dvb_frontend_ops si2165_ops = {
+ .info = {
+ .name = "Silicon Labs ",
+ /* For DVB-C */
+ .symbol_rate_min = 1000000,
+ .symbol_rate_max = 7200000,
+ /* For DVB-T */
+ .frequency_stepsize_hz = 166667,
+ .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_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_frontend,
+ .read_status = si2165_read_status,
+ .read_snr = si2165_read_snr,
+ .read_ber = si2165_read_ber,
+};
+
+static int si2165_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si2165_state *state = NULL;
+ struct si2165_platform_data *pdata = client->dev.platform_data;
+ int n;
+ int ret = 0;
+ u8 val;
+ char rev_char;
+ const char *chip_name;
+ static const struct regmap_config regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .max_register = 0x08ff,
+ };
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ /* create regmap */
+ state->regmap = devm_regmap_init_i2c(client, &regmap_config);
+ if (IS_ERR(state->regmap)) {
+ ret = PTR_ERR(state->regmap);
+ goto error;
+ }
+
+ /* setup the state */
+ state->client = client;
+ state->config.i2c_addr = client->addr;
+ state->config.chip_mode = pdata->chip_mode;
+ state->config.ref_freq_hz = pdata->ref_freq_hz;
+ state->config.inversion = pdata->inversion;
+
+ if (state->config.ref_freq_hz < 4000000 ||
+ state->config.ref_freq_hz > 27000000) {
+ dev_err(&state->client->dev, "ref_freq of %d Hz not supported by this driver\n",
+ state->config.ref_freq_hz);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ /* create dvb_frontend */
+ memcpy(&state->fe.ops, &si2165_ops,
+ sizeof(struct dvb_frontend_ops));
+ state->fe.ops.release = NULL;
+ state->fe.demodulator_priv = state;
+ i2c_set_clientdata(client, state);
+
+ /* powerup */
+ ret = si2165_writereg8(state, REG_CHIP_MODE, state->config.chip_mode);
+ if (ret < 0)
+ goto nodev_error;
+
+ ret = si2165_readreg8(state, REG_CHIP_MODE, &val);
+ if (ret < 0)
+ goto nodev_error;
+ if (val != state->config.chip_mode)
+ goto nodev_error;
+
+ ret = si2165_readreg8(state, REG_CHIP_REVCODE, &state->chip_revcode);
+ if (ret < 0)
+ goto nodev_error;
+
+ ret = si2165_readreg8(state, REV_CHIP_TYPE, &state->chip_type);
+ if (ret < 0)
+ goto nodev_error;
+
+ /* powerdown */
+ ret = si2165_writereg8(state, REG_CHIP_MODE, SI2165_MODE_OFF);
+ if (ret < 0)
+ goto nodev_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->client->dev, "Unsupported Silicon Labs chip (type %d, rev %d)\n",
+ state->chip_type, state->chip_revcode);
+ goto nodev_error;
+ }
+
+ dev_info(&state->client->dev,
+ "Detected Silicon Labs %s-%c (type %d, rev %d)\n",
+ chip_name, rev_char, state->chip_type,
+ state->chip_revcode);
+
+ strlcat(state->fe.ops.info.name, chip_name,
+ sizeof(state->fe.ops.info.name));
+
+ n = 0;
+ if (state->has_dvbt) {
+ state->fe.ops.delsys[n++] = SYS_DVBT;
+ strlcat(state->fe.ops.info.name, " DVB-T",
+ sizeof(state->fe.ops.info.name));
+ }
+ if (state->has_dvbc) {
+ state->fe.ops.delsys[n++] = SYS_DVBC_ANNEX_A;
+ strlcat(state->fe.ops.info.name, " DVB-C",
+ sizeof(state->fe.ops.info.name));
+ }
+
+ /* return fe pointer */
+ *pdata->fe = &state->fe;
+
+ return 0;
+
+nodev_error:
+ ret = -ENODEV;
+error:
+ kfree(state);
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2165_remove(struct i2c_client *client)
+{
+ struct si2165_state *state = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ kfree(state);
+ return 0;
+}
+
+static const struct i2c_device_id si2165_id_table[] = {
+ {"si2165", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, si2165_id_table);
+
+static struct i2c_driver si2165_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "si2165",
+ },
+ .probe = si2165_probe,
+ .remove = si2165_remove,
+ .id_table = si2165_id_table,
+};
+
+module_i2c_driver(si2165_driver);
+
+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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 03:26:59 +0000