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path: root/drivers/media/dvb/frontends/lgdt3305.c
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Diffstat (limited to 'drivers/media/dvb/frontends/lgdt3305.c')
-rw-r--r--drivers/media/dvb/frontends/lgdt3305.c1087
1 files changed, 1087 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/lgdt3305.c b/drivers/media/dvb/frontends/lgdt3305.c
new file mode 100644
index 000000000000..d92d0557a80b
--- /dev/null
+++ b/drivers/media/dvb/frontends/lgdt3305.c
@@ -0,0 +1,1087 @@
+/*
+ * Support for LGDT3305 - VSB/QAM
+ *
+ * Copyright (C) 2008, 2009 Michael Krufky <mkrufky@linuxtv.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.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/dvb/frontend.h>
+#include "dvb_math.h"
+#include "lgdt3305.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
+
+#define DBG_INFO 1
+#define DBG_REG 2
+
+#define lg_printk(kern, fmt, arg...) \
+ printk(kern "%s: " fmt, __func__, ##arg)
+
+#define lg_info(fmt, arg...) printk(KERN_INFO "lgdt3305: " fmt, ##arg)
+#define lg_warn(fmt, arg...) lg_printk(KERN_WARNING, fmt, ##arg)
+#define lg_err(fmt, arg...) lg_printk(KERN_ERR, fmt, ##arg)
+#define lg_dbg(fmt, arg...) if (debug & DBG_INFO) \
+ lg_printk(KERN_DEBUG, fmt, ##arg)
+#define lg_reg(fmt, arg...) if (debug & DBG_REG) \
+ lg_printk(KERN_DEBUG, fmt, ##arg)
+
+#define lg_fail(ret) \
+({ \
+ int __ret; \
+ __ret = (ret < 0); \
+ if (__ret) \
+ lg_err("error %d on line %d\n", ret, __LINE__); \
+ __ret; \
+})
+
+struct lgdt3305_state {
+ struct i2c_adapter *i2c_adap;
+ const struct lgdt3305_config *cfg;
+
+ struct dvb_frontend frontend;
+
+ fe_modulation_t current_modulation;
+ u32 current_frequency;
+ u32 snr;
+};
+
+/* ------------------------------------------------------------------------ */
+
+#define LGDT3305_GEN_CTRL_1 0x0000
+#define LGDT3305_GEN_CTRL_2 0x0001
+#define LGDT3305_GEN_CTRL_3 0x0002
+#define LGDT3305_GEN_STATUS 0x0003
+#define LGDT3305_GEN_CONTROL 0x0007
+#define LGDT3305_GEN_CTRL_4 0x000a
+#define LGDT3305_DGTL_AGC_REF_1 0x0012
+#define LGDT3305_DGTL_AGC_REF_2 0x0013
+#define LGDT3305_CR_CTR_FREQ_1 0x0106
+#define LGDT3305_CR_CTR_FREQ_2 0x0107
+#define LGDT3305_CR_CTR_FREQ_3 0x0108
+#define LGDT3305_CR_CTR_FREQ_4 0x0109
+#define LGDT3305_CR_MSE_1 0x011b
+#define LGDT3305_CR_MSE_2 0x011c
+#define LGDT3305_CR_LOCK_STATUS 0x011d
+#define LGDT3305_CR_CTRL_7 0x0126
+#define LGDT3305_AGC_POWER_REF_1 0x0300
+#define LGDT3305_AGC_POWER_REF_2 0x0301
+#define LGDT3305_AGC_DELAY_PT_1 0x0302
+#define LGDT3305_AGC_DELAY_PT_2 0x0303
+#define LGDT3305_RFAGC_LOOP_FLTR_BW_1 0x0306
+#define LGDT3305_RFAGC_LOOP_FLTR_BW_2 0x0307
+#define LGDT3305_IFBW_1 0x0308
+#define LGDT3305_IFBW_2 0x0309
+#define LGDT3305_AGC_CTRL_1 0x030c
+#define LGDT3305_AGC_CTRL_4 0x0314
+#define LGDT3305_EQ_MSE_1 0x0413
+#define LGDT3305_EQ_MSE_2 0x0414
+#define LGDT3305_EQ_MSE_3 0x0415
+#define LGDT3305_PT_MSE_1 0x0417
+#define LGDT3305_PT_MSE_2 0x0418
+#define LGDT3305_PT_MSE_3 0x0419
+#define LGDT3305_FEC_BLOCK_CTRL 0x0504
+#define LGDT3305_FEC_LOCK_STATUS 0x050a
+#define LGDT3305_FEC_PKT_ERR_1 0x050c
+#define LGDT3305_FEC_PKT_ERR_2 0x050d
+#define LGDT3305_TP_CTRL_1 0x050e
+#define LGDT3305_BERT_PERIOD 0x0801
+#define LGDT3305_BERT_ERROR_COUNT_1 0x080a
+#define LGDT3305_BERT_ERROR_COUNT_2 0x080b
+#define LGDT3305_BERT_ERROR_COUNT_3 0x080c
+#define LGDT3305_BERT_ERROR_COUNT_4 0x080d
+
+static int lgdt3305_write_reg(struct lgdt3305_state *state, u16 reg, u8 val)
+{
+ int ret;
+ u8 buf[] = { reg >> 8, reg & 0xff, val };
+ struct i2c_msg msg = {
+ .addr = state->cfg->i2c_addr, .flags = 0,
+ .buf = buf, .len = 3,
+ };
+
+ lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);
+
+ ret = i2c_transfer(state->i2c_adap, &msg, 1);
+
+ if (ret != 1) {
+ lg_err("error (addr %02x %02x <- %02x, err = %i)\n",
+ msg.buf[0], msg.buf[1], msg.buf[2], ret);
+ if (ret < 0)
+ return ret;
+ else
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+static int lgdt3305_read_reg(struct lgdt3305_state *state, u16 reg, u8 *val)
+{
+ int ret;
+ u8 reg_buf[] = { reg >> 8, reg & 0xff };
+ struct i2c_msg msg[] = {
+ { .addr = state->cfg->i2c_addr,
+ .flags = 0, .buf = reg_buf, .len = 2 },
+ { .addr = state->cfg->i2c_addr,
+ .flags = I2C_M_RD, .buf = val, .len = 1 },
+ };
+
+ lg_reg("reg: 0x%04x\n", reg);
+
+ ret = i2c_transfer(state->i2c_adap, msg, 2);
+
+ if (ret != 2) {
+ lg_err("error (addr %02x reg %04x error (ret == %i)\n",
+ state->cfg->i2c_addr, reg, ret);
+ if (ret < 0)
+ return ret;
+ else
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+#define read_reg(state, reg) \
+({ \
+ u8 __val; \
+ int ret = lgdt3305_read_reg(state, reg, &__val); \
+ if (lg_fail(ret)) \
+ __val = 0; \
+ __val; \
+})
+
+static int lgdt3305_set_reg_bit(struct lgdt3305_state *state,
+ u16 reg, int bit, int onoff)
+{
+ u8 val;
+ int ret;
+
+ lg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);
+
+ ret = lgdt3305_read_reg(state, reg, &val);
+ if (lg_fail(ret))
+ goto fail;
+
+ val &= ~(1 << bit);
+ val |= (onoff & 1) << bit;
+
+ ret = lgdt3305_write_reg(state, reg, val);
+fail:
+ return ret;
+}
+
+struct lgdt3305_reg {
+ u16 reg;
+ u8 val;
+};
+
+static int lgdt3305_write_regs(struct lgdt3305_state *state,
+ struct lgdt3305_reg *regs, int len)
+{
+ int i, ret;
+
+ lg_reg("writing %d registers...\n", len);
+
+ for (i = 0; i < len - 1; i++) {
+ ret = lgdt3305_write_reg(state, regs[i].reg, regs[i].val);
+ if (lg_fail(ret))
+ return ret;
+ }
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lgdt3305_soft_reset(struct lgdt3305_state *state)
+{
+ int ret;
+
+ lg_dbg("\n");
+
+ ret = lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_3, 0, 0);
+ if (lg_fail(ret))
+ goto fail;
+
+ msleep(20);
+ ret = lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_3, 0, 1);
+fail:
+ return ret;
+}
+
+static inline int lgdt3305_mpeg_mode(struct lgdt3305_state *state,
+ enum lgdt3305_mpeg_mode mode)
+{
+ lg_dbg("(%d)\n", mode);
+ return lgdt3305_set_reg_bit(state, LGDT3305_TP_CTRL_1, 5, mode);
+}
+
+static int lgdt3305_mpeg_mode_polarity(struct lgdt3305_state *state,
+ enum lgdt3305_tp_clock_edge edge,
+ enum lgdt3305_tp_valid_polarity valid)
+{
+ u8 val;
+ int ret;
+
+ lg_dbg("edge = %d, valid = %d\n", edge, valid);
+
+ ret = lgdt3305_read_reg(state, LGDT3305_TP_CTRL_1, &val);
+ if (lg_fail(ret))
+ goto fail;
+
+ val &= ~0x09;
+
+ if (edge)
+ val |= 0x08;
+ if (valid)
+ val |= 0x01;
+
+ ret = lgdt3305_write_reg(state, LGDT3305_TP_CTRL_1, val);
+ if (lg_fail(ret))
+ goto fail;
+
+ ret = lgdt3305_soft_reset(state);
+fail:
+ return ret;
+}
+
+static int lgdt3305_set_modulation(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ u8 opermode;
+ int ret;
+
+ lg_dbg("\n");
+
+ ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_1, &opermode);
+ if (lg_fail(ret))
+ goto fail;
+
+ opermode &= ~0x03;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ opermode |= 0x03;
+ break;
+ case QAM_64:
+ opermode |= 0x00;
+ break;
+ case QAM_256:
+ opermode |= 0x01;
+ break;
+ default:
+ return -EINVAL;
+ }
+ ret = lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_1, opermode);
+fail:
+ return ret;
+}
+
+static int lgdt3305_set_filter_extension(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ int val;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ val = 0;
+ break;
+ case QAM_64:
+ case QAM_256:
+ val = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ lg_dbg("val = %d\n", val);
+
+ return lgdt3305_set_reg_bit(state, 0x043f, 2, val);
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lgdt3305_passband_digital_agc(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ u16 agc_ref;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ agc_ref = 0x32c4;
+ break;
+ case QAM_64:
+ agc_ref = 0x2a00;
+ break;
+ case QAM_256:
+ agc_ref = 0x2a80;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ lg_dbg("agc ref: 0x%04x\n", agc_ref);
+
+ lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_1, agc_ref >> 8);
+ lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_2, agc_ref & 0xff);
+
+ return 0;
+}
+
+static int lgdt3305_rfagc_loop(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ u16 ifbw, rfbw, agcdelay;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ agcdelay = 0x04c0;
+ rfbw = 0x8000;
+ ifbw = 0x8000;
+ break;
+ case QAM_64:
+ case QAM_256:
+ agcdelay = 0x046b;
+ rfbw = 0x8889;
+ ifbw = 0x8888;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (state->cfg->rf_agc_loop) {
+ lg_dbg("agcdelay: 0x%04x, rfbw: 0x%04x\n", agcdelay, rfbw);
+
+ /* rf agc loop filter bandwidth */
+ lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_1,
+ agcdelay >> 8);
+ lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_2,
+ agcdelay & 0xff);
+
+ lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_1,
+ rfbw >> 8);
+ lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_2,
+ rfbw & 0xff);
+ } else {
+ lg_dbg("ifbw: 0x%04x\n", ifbw);
+
+ /* if agc loop filter bandwidth */
+ lgdt3305_write_reg(state, LGDT3305_IFBW_1, ifbw >> 8);
+ lgdt3305_write_reg(state, LGDT3305_IFBW_2, ifbw & 0xff);
+ }
+
+ return 0;
+}
+
+static int lgdt3305_agc_setup(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ int lockdten, acqen;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ lockdten = 0;
+ acqen = 0;
+ break;
+ case QAM_64:
+ case QAM_256:
+ lockdten = 1;
+ acqen = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ lg_dbg("lockdten = %d, acqen = %d\n", lockdten, acqen);
+
+ /* control agc function */
+ lgdt3305_write_reg(state, LGDT3305_AGC_CTRL_4, 0xe1 | lockdten << 1);
+ lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 2, acqen);
+
+ return lgdt3305_rfagc_loop(state, param);
+}
+
+static int lgdt3305_set_agc_power_ref(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ u16 usref = 0;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ if (state->cfg->usref_8vsb)
+ usref = state->cfg->usref_8vsb;
+ break;
+ case QAM_64:
+ if (state->cfg->usref_qam64)
+ usref = state->cfg->usref_qam64;
+ break;
+ case QAM_256:
+ if (state->cfg->usref_qam256)
+ usref = state->cfg->usref_qam256;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (usref) {
+ lg_dbg("set manual mode: 0x%04x\n", usref);
+
+ lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 3, 1);
+
+ lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_1,
+ 0xff & (usref >> 8));
+ lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_2,
+ 0xff & (usref >> 0));
+ }
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lgdt3305_spectral_inversion(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param,
+ int inversion)
+{
+ int ret;
+
+ lg_dbg("(%d)\n", inversion);
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ ret = lgdt3305_write_reg(state, LGDT3305_CR_CTRL_7,
+ inversion ? 0xf9 : 0x79);
+ break;
+ case QAM_64:
+ case QAM_256:
+ ret = lgdt3305_write_reg(state, LGDT3305_FEC_BLOCK_CTRL,
+ inversion ? 0xfd : 0xff);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static int lgdt3305_set_if(struct lgdt3305_state *state,
+ struct dvb_frontend_parameters *param)
+{
+ u16 if_freq_khz;
+ u8 nco1, nco2, nco3, nco4;
+ u64 nco;
+
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+ if_freq_khz = state->cfg->vsb_if_khz;
+ break;
+ case QAM_64:
+ case QAM_256:
+ if_freq_khz = state->cfg->qam_if_khz;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ nco = if_freq_khz / 10;
+
+#define LGDT3305_64BIT_DIVISION_ENABLED 0
+ /* FIXME: 64bit division disabled to avoid linking error:
+ * WARNING: "__udivdi3" [lgdt3305.ko] undefined!
+ */
+ switch (param->u.vsb.modulation) {
+ case VSB_8:
+#if LGDT3305_64BIT_DIVISION_ENABLED
+ nco <<= 24;
+ nco /= 625;
+#else
+ nco *= ((1 << 24) / 625);
+#endif
+ break;
+ case QAM_64:
+ case QAM_256:
+#if LGDT3305_64BIT_DIVISION_ENABLED
+ nco <<= 28;
+ nco /= 625;
+#else
+ nco *= ((1 << 28) / 625);
+#endif
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ nco1 = (nco >> 24) & 0x3f;
+ nco1 |= 0x40;
+ nco2 = (nco >> 16) & 0xff;
+ nco3 = (nco >> 8) & 0xff;
+ nco4 = nco & 0xff;
+
+ lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_1, nco1);
+ lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_2, nco2);
+ lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_3, nco3);
+ lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_4, nco4);
+
+ lg_dbg("%d KHz -> [%02x%02x%02x%02x]\n",
+ if_freq_khz, nco1, nco2, nco3, nco4);
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lgdt3305_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+
+ if (state->cfg->deny_i2c_rptr)
+ return 0;
+
+ lg_dbg("(%d)\n", enable);
+
+ return lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_2, 5,
+ enable ? 0 : 1);
+}
+
+static int lgdt3305_sleep(struct dvb_frontend *fe)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ u8 gen_ctrl_3, gen_ctrl_4;
+
+ lg_dbg("\n");
+
+ gen_ctrl_3 = read_reg(state, LGDT3305_GEN_CTRL_3);
+ gen_ctrl_4 = read_reg(state, LGDT3305_GEN_CTRL_4);
+
+ /* hold in software reset while sleeping */
+ gen_ctrl_3 &= ~0x01;
+ /* tristate the IF-AGC pin */
+ gen_ctrl_3 |= 0x02;
+ /* tristate the RF-AGC pin */
+ gen_ctrl_3 |= 0x04;
+
+ /* disable vsb/qam module */
+ gen_ctrl_4 &= ~0x01;
+ /* disable adc module */
+ gen_ctrl_4 &= ~0x02;
+
+ lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_3, gen_ctrl_3);
+ lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_4, gen_ctrl_4);
+
+ return 0;
+}
+
+static int lgdt3305_init(struct dvb_frontend *fe)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ int ret;
+
+ static struct lgdt3305_reg lgdt3305_init_data[] = {
+ { .reg = LGDT3305_GEN_CTRL_1,
+ .val = 0x03, },
+ { .reg = LGDT3305_GEN_CTRL_2,
+ .val = 0xb0, },
+ { .reg = LGDT3305_GEN_CTRL_3,
+ .val = 0x01, },
+ { .reg = LGDT3305_GEN_CONTROL,
+ .val = 0x6f, },
+ { .reg = LGDT3305_GEN_CTRL_4,
+ .val = 0x03, },
+ { .reg = LGDT3305_DGTL_AGC_REF_1,
+ .val = 0x32, },
+ { .reg = LGDT3305_DGTL_AGC_REF_2,
+ .val = 0xc4, },
+ { .reg = LGDT3305_CR_CTR_FREQ_1,
+ .val = 0x00, },
+ { .reg = LGDT3305_CR_CTR_FREQ_2,
+ .val = 0x00, },
+ { .reg = LGDT3305_CR_CTR_FREQ_3,
+ .val = 0x00, },
+ { .reg = LGDT3305_CR_CTR_FREQ_4,
+ .val = 0x00, },
+ { .reg = LGDT3305_CR_CTRL_7,
+ .val = 0x79, },
+ { .reg = LGDT3305_AGC_POWER_REF_1,
+ .val = 0x32, },
+ { .reg = LGDT3305_AGC_POWER_REF_2,
+ .val = 0xc4, },
+ { .reg = LGDT3305_AGC_DELAY_PT_1,
+ .val = 0x0d, },
+ { .reg = LGDT3305_AGC_DELAY_PT_2,
+ .val = 0x30, },
+ { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_1,
+ .val = 0x80, },
+ { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_2,
+ .val = 0x00, },
+ { .reg = LGDT3305_IFBW_1,
+ .val = 0x80, },
+ { .reg = LGDT3305_IFBW_2,
+ .val = 0x00, },
+ { .reg = LGDT3305_AGC_CTRL_1,
+ .val = 0x30, },
+ { .reg = LGDT3305_AGC_CTRL_4,
+ .val = 0x61, },
+ { .reg = LGDT3305_FEC_BLOCK_CTRL,
+ .val = 0xff, },
+ { .reg = LGDT3305_TP_CTRL_1,
+ .val = 0x1b, },
+ };
+
+ lg_dbg("\n");
+
+ ret = lgdt3305_write_regs(state, lgdt3305_init_data,
+ ARRAY_SIZE(lgdt3305_init_data));
+ if (lg_fail(ret))
+ goto fail;
+
+ ret = lgdt3305_soft_reset(state);
+fail:
+ return ret;
+}
+
+static int lgdt3305_set_parameters(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *param)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ int ret;
+
+ lg_dbg("(%d, %d)\n", param->frequency, param->u.vsb.modulation);
+
+ if (fe->ops.tuner_ops.set_params) {
+ ret = fe->ops.tuner_ops.set_params(fe, param);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ if (lg_fail(ret))
+ goto fail;
+ state->current_frequency = param->frequency;
+ }
+
+ ret = lgdt3305_set_modulation(state, param);
+ if (lg_fail(ret))
+ goto fail;
+
+ ret = lgdt3305_passband_digital_agc(state, param);
+ if (lg_fail(ret))
+ goto fail;
+ ret = lgdt3305_set_agc_power_ref(state, param);
+ if (lg_fail(ret))
+ goto fail;
+ ret = lgdt3305_agc_setup(state, param);
+ if (lg_fail(ret))
+ goto fail;
+
+ /* low if */
+ ret = lgdt3305_write_reg(state, LGDT3305_GEN_CONTROL, 0x2f);
+ if (lg_fail(ret))
+ goto fail;
+ ret = lgdt3305_set_reg_bit(state, LGDT3305_CR_CTR_FREQ_1, 6, 1);
+ if (lg_fail(ret))
+ goto fail;
+
+ ret = lgdt3305_set_if(state, param);
+ if (lg_fail(ret))
+ goto fail;
+ ret = lgdt3305_spectral_inversion(state, param,
+ state->cfg->spectral_inversion
+ ? 1 : 0);
+ if (lg_fail(ret))
+ goto fail;
+
+ ret = lgdt3305_set_filter_extension(state, param);
+ if (lg_fail(ret))
+ goto fail;
+
+ state->current_modulation = param->u.vsb.modulation;
+
+ ret = lgdt3305_mpeg_mode(state, state->cfg->mpeg_mode);
+ if (lg_fail(ret))
+ goto fail;
+
+ /* lgdt3305_mpeg_mode_polarity calls lgdt3305_soft_reset */
+ ret = lgdt3305_mpeg_mode_polarity(state,
+ state->cfg->tpclk_edge,
+ state->cfg->tpvalid_polarity);
+fail:
+ return ret;
+}
+
+static int lgdt3305_get_frontend(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *param)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+
+ lg_dbg("\n");
+
+ param->u.vsb.modulation = state->current_modulation;
+ param->frequency = state->current_frequency;
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lgdt3305_read_cr_lock_status(struct lgdt3305_state *state,
+ int *locked)
+{
+ u8 val;
+ int ret;
+ char *cr_lock_state = "";
+
+ *locked = 0;
+
+ ret = lgdt3305_read_reg(state, LGDT3305_CR_LOCK_STATUS, &val);
+ if (lg_fail(ret))
+ goto fail;
+
+ switch (state->current_modulation) {
+ case QAM_256:
+ case QAM_64:
+ if (val & (1 << 1))
+ *locked = 1;
+
+ switch (val & 0x07) {
+ case 0:
+ cr_lock_state = "QAM UNLOCK";
+ break;
+ case 4:
+ cr_lock_state = "QAM 1stLock";
+ break;
+ case 6:
+ cr_lock_state = "QAM 2ndLock";
+ break;
+ case 7:
+ cr_lock_state = "QAM FinalLock";
+ break;
+ default:
+ cr_lock_state = "CLOCKQAM-INVALID!";
+ break;
+ }
+ break;
+ case VSB_8:
+ if (val & (1 << 7)) {
+ *locked = 1;
+ cr_lock_state = "CLOCKVSB";
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ lg_dbg("(%d) %s\n", *locked, cr_lock_state);
+fail:
+ return ret;
+}
+
+static int lgdt3305_read_fec_lock_status(struct lgdt3305_state *state,
+ int *locked)
+{
+ u8 val;
+ int ret, mpeg_lock, fec_lock, viterbi_lock;
+
+ *locked = 0;
+
+ switch (state->current_modulation) {
+ case QAM_256:
+ case QAM_64:
+ ret = lgdt3305_read_reg(state,
+ LGDT3305_FEC_LOCK_STATUS, &val);
+ if (lg_fail(ret))
+ goto fail;
+
+ mpeg_lock = (val & (1 << 0)) ? 1 : 0;
+ fec_lock = (val & (1 << 2)) ? 1 : 0;
+ viterbi_lock = (val & (1 << 3)) ? 1 : 0;
+
+ *locked = mpeg_lock && fec_lock && viterbi_lock;
+
+ lg_dbg("(%d) %s%s%s\n", *locked,
+ mpeg_lock ? "mpeg lock " : "",
+ fec_lock ? "fec lock " : "",
+ viterbi_lock ? "viterbi lock" : "");
+ break;
+ case VSB_8:
+ default:
+ ret = -EINVAL;
+ }
+fail:
+ return ret;
+}
+
+static int lgdt3305_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ u8 val;
+ int ret, signal, inlock, nofecerr, snrgood,
+ cr_lock, fec_lock, sync_lock;
+
+ *status = 0;
+
+ ret = lgdt3305_read_reg(state, LGDT3305_GEN_STATUS, &val);
+ if (lg_fail(ret))
+ goto fail;
+
+ signal = (val & (1 << 4)) ? 1 : 0;
+ inlock = (val & (1 << 3)) ? 0 : 1;
+ sync_lock = (val & (1 << 2)) ? 1 : 0;
+ nofecerr = (val & (1 << 1)) ? 1 : 0;
+ snrgood = (val & (1 << 0)) ? 1 : 0;
+
+ lg_dbg("%s%s%s%s%s\n",
+ signal ? "SIGNALEXIST " : "",
+ inlock ? "INLOCK " : "",
+ sync_lock ? "SYNCLOCK " : "",
+ nofecerr ? "NOFECERR " : "",
+ snrgood ? "SNRGOOD " : "");
+
+ ret = lgdt3305_read_cr_lock_status(state, &cr_lock);
+ if (lg_fail(ret))
+ goto fail;
+
+ if (signal)
+ *status |= FE_HAS_SIGNAL;
+ if (cr_lock)
+ *status |= FE_HAS_CARRIER;
+ if (nofecerr)
+ *status |= FE_HAS_VITERBI;
+ if (sync_lock)
+ *status |= FE_HAS_SYNC;
+
+ switch (state->current_modulation) {
+ case QAM_256:
+ case QAM_64:
+ ret = lgdt3305_read_fec_lock_status(state, &fec_lock);
+ if (lg_fail(ret))
+ goto fail;
+
+ if (fec_lock)
+ *status |= FE_HAS_LOCK;
+ break;
+ case VSB_8:
+ if (inlock)
+ *status |= FE_HAS_LOCK;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+fail:
+ return ret;
+}
+
+/* ------------------------------------------------------------------------ */
+
+/* borrowed from lgdt330x.c */
+static u32 calculate_snr(u32 mse, u32 c)
+{
+ if (mse == 0) /* no signal */
+ return 0;
+
+ mse = intlog10(mse);
+ if (mse > c) {
+ /* Negative SNR, which is possible, but realisticly the
+ demod will lose lock before the signal gets this bad. The
+ API only allows for unsigned values, so just return 0 */
+ return 0;
+ }
+ return 10*(c - mse);
+}
+
+static int lgdt3305_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ u32 noise; /* noise value */
+ u32 c; /* per-modulation SNR calculation constant */
+
+ switch (state->current_modulation) {
+ case VSB_8:
+#ifdef USE_PTMSE
+ /* Use Phase Tracker Mean-Square Error Register */
+ /* SNR for ranges from -13.11 to +44.08 */
+ noise = ((read_reg(state, LGDT3305_PT_MSE_1) & 0x07) << 16) |
+ (read_reg(state, LGDT3305_PT_MSE_2) << 8) |
+ (read_reg(state, LGDT3305_PT_MSE_3) & 0xff);
+ c = 73957994; /* log10(25*32^2)*2^24 */
+#else
+ /* Use Equalizer Mean-Square Error Register */
+ /* SNR for ranges from -16.12 to +44.08 */
+ noise = ((read_reg(state, LGDT3305_EQ_MSE_1) & 0x0f) << 16) |
+ (read_reg(state, LGDT3305_EQ_MSE_2) << 8) |
+ (read_reg(state, LGDT3305_EQ_MSE_3) & 0xff);
+ c = 73957994; /* log10(25*32^2)*2^24 */
+#endif
+ break;
+ case QAM_64:
+ case QAM_256:
+ noise = (read_reg(state, LGDT3305_CR_MSE_1) << 8) |
+ (read_reg(state, LGDT3305_CR_MSE_2) & 0xff);
+
+ c = (state->current_modulation == QAM_64) ?
+ 97939837 : 98026066;
+ /* log10(688128)*2^24 and log10(696320)*2^24 */
+ break;
+ default:
+ return -EINVAL;
+ }
+ state->snr = calculate_snr(noise, c);
+ /* report SNR in dB * 10 */
+ *snr = (state->snr / ((1 << 24) / 10));
+ lg_dbg("noise = 0x%08x, snr = %d.%02d dB\n", noise,
+ state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16);
+
+ return 0;
+}
+
+static int lgdt3305_read_signal_strength(struct dvb_frontend *fe,
+ u16 *strength)
+{
+ /* borrowed from lgdt330x.c
+ *
+ * Calculate strength from SNR up to 35dB
+ * Even though the SNR can go higher than 35dB,
+ * there is some comfort factor in having a range of
+ * strong signals that can show at 100%
+ */
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ u16 snr;
+ int ret;
+
+ *strength = 0;
+
+ ret = fe->ops.read_snr(fe, &snr);
+ if (lg_fail(ret))
+ goto fail;
+ /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
+ /* scale the range 0 - 35*2^24 into 0 - 65535 */
+ if (state->snr >= 8960 * 0x10000)
+ *strength = 0xffff;
+ else
+ *strength = state->snr / 8960;
+fail:
+ return ret;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lgdt3305_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ *ber = 0;
+ return 0;
+}
+
+static int lgdt3305_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+
+ *ucblocks =
+ (read_reg(state, LGDT3305_FEC_PKT_ERR_1) << 8) |
+ (read_reg(state, LGDT3305_FEC_PKT_ERR_2) & 0xff);
+
+ return 0;
+}
+
+static int lgdt3305_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings
+ *fe_tune_settings)
+{
+ fe_tune_settings->min_delay_ms = 500;
+ lg_dbg("\n");
+ return 0;
+}
+
+static void lgdt3305_release(struct dvb_frontend *fe)
+{
+ struct lgdt3305_state *state = fe->demodulator_priv;
+ lg_dbg("\n");
+ kfree(state);
+}
+
+static struct dvb_frontend_ops lgdt3305_ops;
+
+struct dvb_frontend *lgdt3305_attach(const struct lgdt3305_config *config,
+ struct i2c_adapter *i2c_adap)
+{
+ struct lgdt3305_state *state = NULL;
+ int ret;
+ u8 val;
+
+ lg_dbg("(%d-%04x)\n",
+ i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
+ config ? config->i2c_addr : 0);
+
+ state = kzalloc(sizeof(struct lgdt3305_state), GFP_KERNEL);
+ if (state == NULL)
+ goto fail;
+
+ state->cfg = config;
+ state->i2c_adap = i2c_adap;
+
+ memcpy(&state->frontend.ops, &lgdt3305_ops,
+ sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+
+ /* verify that we're talking to a lg dt3305 */
+ ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_2, &val);
+ if ((lg_fail(ret)) | (val == 0))
+ goto fail;
+ ret = lgdt3305_write_reg(state, 0x0808, 0x80);
+ if (lg_fail(ret))
+ goto fail;
+ ret = lgdt3305_read_reg(state, 0x0808, &val);
+ if ((lg_fail(ret)) | (val != 0x80))
+ goto fail;
+ ret = lgdt3305_write_reg(state, 0x0808, 0x00);
+ if (lg_fail(ret))
+ goto fail;
+
+ state->current_frequency = -1;
+ state->current_modulation = -1;
+
+ return &state->frontend;
+fail:
+ lg_warn("unable to detect LGDT3305 hardware\n");
+ kfree(state);
+ return NULL;
+}
+EXPORT_SYMBOL(lgdt3305_attach);
+
+static struct dvb_frontend_ops lgdt3305_ops = {
+ .info = {
+ .name = "LG Electronics LGDT3305 VSB/QAM Frontend",
+ .type = FE_ATSC,
+ .frequency_min = 54000000,
+ .frequency_max = 858000000,
+ .frequency_stepsize = 62500,
+ .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
+ },
+ .i2c_gate_ctrl = lgdt3305_i2c_gate_ctrl,
+ .init = lgdt3305_init,
+ .sleep = lgdt3305_sleep,
+ .set_frontend = lgdt3305_set_parameters,
+ .get_frontend = lgdt3305_get_frontend,
+ .get_tune_settings = lgdt3305_get_tune_settings,
+ .read_status = lgdt3305_read_status,
+ .read_ber = lgdt3305_read_ber,
+ .read_signal_strength = lgdt3305_read_signal_strength,
+ .read_snr = lgdt3305_read_snr,
+ .read_ucblocks = lgdt3305_read_ucblocks,
+ .release = lgdt3305_release,
+};
+
+MODULE_DESCRIPTION("LG Electronics LGDT3305 ATSC/QAM-B Demodulator Driver");
+MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.1");
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 05:32:52 +0100