--- /dev/null
+/*
+ * Support for Legend Silicon DMB-TH demodulator
+ * LGS8913, LGS8GL5
+ * experimental support LGS8G42, LGS8G52
+ *
+ * Copyright (C) 2007,2008 David T.L. Wong <davidtlwong@gmail.com>
+ * Copyright (C) 2008 Sirius International (Hong Kong) Limited
+ * Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
+ *
+ * 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 <asm/div64.h>
+
+#include "dvb_frontend.h"
+
+#include "lgs8gxx.h"
+#include "lgs8gxx_priv.h"
+
+#define dprintk(args...) \
+ do { \
+ if (debug) \
+ printk(KERN_DEBUG "lgs8gxx: " args); \
+ } while (0)
+
+static int debug;
+static int fake_signal_str;
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+module_param(fake_signal_str, int, 0644);
+MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
+"Signal strength calculation is slow.(default:off).");
+
+/* LGS8GXX internal helper functions */
+
+static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
+{
+ int ret;
+ u8 buf[] = { reg, data };
+ struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
+
+ msg.addr = priv->config->demod_address;
+ if (reg >= 0xC0)
+ msg.addr += 0x02;
+
+ if (debug >= 2)
+ printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n",
+ __func__, reg, data);
+
+ ret = i2c_transfer(priv->i2c, &msg, 1);
+
+ if (ret != 1)
+ dprintk(KERN_DEBUG "%s: error reg=0x%x, data=0x%x, ret=%i\n",
+ __func__, reg, data, ret);
+
+ return (ret != 1) ? -1 : 0;
+}
+
+static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
+{
+ int ret;
+ u8 dev_addr;
+
+ u8 b0[] = { reg };
+ u8 b1[] = { 0 };
+ struct i2c_msg msg[] = {
+ { .flags = 0, .buf = b0, .len = 1 },
+ { .flags = I2C_M_RD, .buf = b1, .len = 1 },
+ };
+
+ dev_addr = priv->config->demod_address;
+ if (reg >= 0xC0)
+ dev_addr += 0x02;
+ msg[1].addr = msg[0].addr = dev_addr;
+
+ ret = i2c_transfer(priv->i2c, msg, 2);
+ if (ret != 2) {
+ dprintk(KERN_DEBUG "%s: error reg=0x%x, ret=%i\n",
+ __func__, reg, ret);
+ return -1;
+ }
+
+ *p_data = b1[0];
+ if (debug >= 2)
+ printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n",
+ __func__, reg, b1[0]);
+ return 0;
+}
+
+static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
+{
+ lgs8gxx_write_reg(priv, 0x02, 0x00);
+ msleep(1);
+ lgs8gxx_write_reg(priv, 0x02, 0x01);
+ msleep(100);
+
+ return 0;
+}
+
+static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
+{
+ const struct lgs8gxx_config *config = priv->config;
+ u8 if_conf;
+
+ if_conf = 0x10; /* AGC output on; */
+
+ if_conf |=
+ ((config->ext_adc) ? 0x80 : 0x00) |
+ ((config->if_neg_center) ? 0x04 : 0x00) |
+ ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
+ ((config->ext_adc && config->adc_signed) ? 0x02 : 0x00) |
+ ((config->ext_adc && config->if_neg_edge) ? 0x01 : 0x00);
+
+ if (config->ext_adc &&
+ (config->prod == LGS8GXX_PROD_LGS8G52)) {
+ lgs8gxx_write_reg(priv, 0xBA, 0x40);
+ }
+
+ lgs8gxx_write_reg(priv, 0x07, if_conf);
+
+ return 0;
+}
+
+static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
+{
+ u64 val;
+ u32 v32;
+ u32 if_clk;
+
+ if_clk = priv->config->if_clk_freq;
+
+ val = freq;
+ if (freq != 0) {
+ val *= (u64)1 << 32;
+ if (if_clk != 0)
+ do_div(val, if_clk);
+ v32 = val & 0xFFFFFFFF;
+ dprintk("Set IF Freq to %dkHz\n", freq);
+ } else {
+ v32 = 0;
+ dprintk("Set IF Freq to baseband\n");
+ }
+ dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
+
+ lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
+ lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
+ lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
+ lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
+
+ return 0;
+}
+
+static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
+{
+ u8 t;
+
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913)
+ lgs8gxx_write_reg(priv, 0xC6, 0x01);
+
+ lgs8gxx_read_reg(priv, 0x7E, &t);
+ lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
+
+ /* clear FEC self reset */
+ lgs8gxx_read_reg(priv, 0xC5, &t);
+ lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
+
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
+ /* FEC auto detect */
+ lgs8gxx_write_reg(priv, 0xC1, 0x03);
+
+ lgs8gxx_read_reg(priv, 0x7C, &t);
+ t = (t & 0x8C) | 0x03;
+ lgs8gxx_write_reg(priv, 0x7C, t);
+ }
+
+
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
+ /* BER test mode */
+ lgs8gxx_read_reg(priv, 0xC3, &t);
+ t = (t & 0xEF) | 0x10;
+ lgs8gxx_write_reg(priv, 0xC3, t);
+ }
+
+ if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
+ lgs8gxx_write_reg(priv, 0xD9, 0x40);
+
+ return 0;
+}
+
+static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
+{
+ int ret = 0;
+ u8 t;
+
+ /* turn off auto-detect; manual settings */
+ lgs8gxx_write_reg(priv, 0x7E, 0);
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913)
+ lgs8gxx_write_reg(priv, 0xC1, 0);
+
+ ret = lgs8gxx_read_reg(priv, 0xC5, &t);
+ t = (t & 0xE0) | 0x06;
+ lgs8gxx_write_reg(priv, 0xC5, t);
+
+ lgs8gxx_soft_reset(priv);
+
+ return 0;
+}
+
+static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
+{
+ int ret = 0;
+ u8 t;
+
+ ret = lgs8gxx_read_reg(priv, 0x4B, &t);
+ if (ret != 0)
+ return ret;
+
+ *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
+ return 0;
+}
+
+static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
+ u8 *finished)
+{
+ int ret = 0;
+ u8 t;
+
+ ret = lgs8gxx_read_reg(priv, 0xA4, &t);
+ if (ret != 0)
+ return ret;
+
+ *finished = ((t & 0x3) == 0x1) ? 1 : 0;
+
+ return 0;
+}
+
+static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 *locked)
+{
+ int err;
+ u8 ad_fini = 0;
+
+ if (gi == GI_945)
+ dprintk("try GI 945\n");
+ else if (gi == GI_595)
+ dprintk("try GI 595\n");
+ else if (gi == GI_420)
+ dprintk("try GI 420\n");
+ lgs8gxx_write_reg(priv, 0x04, gi);
+ lgs8gxx_soft_reset(priv);
+ msleep(50);
+ err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
+ if (err != 0)
+ return err;
+ if (ad_fini) {
+ err = lgs8gxx_is_locked(priv, locked);
+ if (err != 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
+ u8 *detected_param, u8 *gi)
+{
+ int i, j;
+ int err = 0;
+ u8 locked = 0, tmp_gi;
+
+ dprintk("%s\n", __func__);
+
+ lgs8gxx_set_mode_auto(priv);
+ /* Guard Interval */
+ lgs8gxx_write_reg(priv, 0x03, 00);
+
+ for (i = 0; i < 2; i++) {
+ for (j = 0; j < 2; j++) {
+ tmp_gi = GI_945;
+ err = lgs8gxx_autolock_gi(priv, GI_945, &locked);
+ if (err)
+ goto out;
+ if (locked)
+ goto locked;
+ }
+ for (j = 0; j < 2; j++) {
+ tmp_gi = GI_420;
+ err = lgs8gxx_autolock_gi(priv, GI_420, &locked);
+ if (err)
+ goto out;
+ if (locked)
+ goto locked;
+ }
+ tmp_gi = GI_595;
+ err = lgs8gxx_autolock_gi(priv, GI_595, &locked);
+ if (err)
+ goto out;
+ if (locked)
+ goto locked;
+ }
+
+locked:
+ if ((err == 0) && (locked == 1)) {
+ u8 t;
+
+ lgs8gxx_read_reg(priv, 0xA2, &t);
+ *detected_param = t;
+
+ if (tmp_gi == GI_945)
+ dprintk("GI 945 locked\n");
+ else if (tmp_gi == GI_595)
+ dprintk("GI 595 locked\n");
+ else if (tmp_gi == GI_420)
+ dprintk("GI 420 locked\n");
+ *gi = tmp_gi;
+ }
+ if (!locked)
+ err = -1;
+
+out:
+ return err;
+}
+
+static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
+{
+ s8 err;
+ u8 gi = 0x2;
+ u8 detected_param = 0;
+
+ err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
+
+ if (err != 0) {
+ dprintk("lgs8gxx_auto_detect failed\n");
+ }
+
+ /* Apply detected parameters */
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
+ u8 inter_leave_len = detected_param & TIM_MASK ;
+ inter_leave_len = (inter_leave_len == TIM_LONG) ? 0x60 : 0x40;
+ detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK;
+ detected_param |= inter_leave_len;
+ }
+ lgs8gxx_write_reg(priv, 0x7D, detected_param);
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913)
+ lgs8gxx_write_reg(priv, 0xC0, detected_param);
+ /* lgs8gxx_soft_reset(priv); */
+
+ /* Enter manual mode */
+ lgs8gxx_set_mode_manual(priv);
+
+ switch (gi) {
+ case GI_945:
+ priv->curr_gi = 945; break;
+ case GI_595:
+ priv->curr_gi = 595; break;
+ case GI_420:
+ priv->curr_gi = 420; break;
+ default:
+ priv->curr_gi = 945; break;
+ }
+}
+
+static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
+ u8 serial, u8 clk_pol, u8 clk_gated)
+{
+ int ret = 0;
+ u8 t;
+
+ ret = lgs8gxx_read_reg(priv, 0xC2, &t);
+ if (ret != 0)
+ return ret;
+
+ t &= 0xF8;
+ t |= serial ? TS_SERIAL : TS_PARALLEL;
+ t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
+ t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
+
+ ret = lgs8gxx_write_reg(priv, 0xC2, t);
+ if (ret != 0)
+ return ret;
+
+ return 0;
+}
+
+
+/* LGS8913 demod frontend functions */
+
+static int lgs8913_init(struct lgs8gxx_state *priv)
+{
+ u8 t;
+
+ /* LGS8913 specific */
+ lgs8gxx_write_reg(priv, 0xc1, 0x3);
+
+ lgs8gxx_read_reg(priv, 0x7c, &t);
+ lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
+
+ /* LGS8913 specific */
+ lgs8gxx_read_reg(priv, 0xc3, &t);
+ lgs8gxx_write_reg(priv, 0xc3, t&0x10);
+
+
+ return 0;
+}
+
+static int lgs8gxx_init(struct dvb_frontend *fe)
+{
+ struct lgs8gxx_state *priv =
+ (struct lgs8gxx_state *)fe->demodulator_priv;
+ const struct lgs8gxx_config *config = priv->config;
+ u8 data = 0;
+ s8 err;
+ dprintk("%s\n", __func__);
+
+ lgs8gxx_read_reg(priv, 0, &data);
+ dprintk("reg 0 = 0x%02X\n", data);
+
+ /* Setup MPEG output format */
+ err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
+ config->ts_clk_pol,
+ config->ts_clk_gated);
+ if (err != 0)
+ return -EIO;
+
+ if (config->prod == LGS8GXX_PROD_LGS8913)
+ lgs8913_init(priv);
+ lgs8gxx_set_if_freq(priv, priv->config->if_freq);
+ if (config->prod != LGS8GXX_PROD_LGS8913)
+ lgs8gxx_set_ad_mode(priv);
+
+ return 0;
+}
+
+static void lgs8gxx_release(struct dvb_frontend *fe)
+{
+ struct lgs8gxx_state *state = fe->demodulator_priv;
+ dprintk("%s\n", __func__);
+
+ kfree(state);
+}
+
+
+static int lgs8gxx_write(struct dvb_frontend *fe, u8 *buf, int len)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+
+ if (len != 2)
+ return -EINVAL;
+
+ return lgs8gxx_write_reg(priv, buf[0], buf[1]);
+}
+
+static int lgs8gxx_set_fe(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *fe_params)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+
+ dprintk("%s\n", __func__);
+
+ /* set frequency */
+ if (fe->ops.tuner_ops.set_params) {
+ fe->ops.tuner_ops.set_params(fe, fe_params);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+
+ /* start auto lock */
+ lgs8gxx_auto_lock(priv);
+
+ msleep(10);
+
+ return 0;
+}
+
+static int lgs8gxx_get_fe(struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *fe_params)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+ u8 t;
+
+ dprintk("%s\n", __func__);
+
+ /* TODO: get real readings from device */
+ /* inversion status */
+ fe_params->inversion = INVERSION_OFF;
+
+ /* bandwidth */
+ fe_params->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
+
+
+ lgs8gxx_read_reg(priv, 0x7D, &t);
+ fe_params->u.ofdm.code_rate_HP = FEC_AUTO;
+ fe_params->u.ofdm.code_rate_LP = FEC_AUTO;
+
+ /* constellation */
+ switch (t & SC_MASK) {
+ case SC_QAM64:
+ fe_params->u.ofdm.constellation = QAM_64;
+ break;
+ case SC_QAM32:
+ fe_params->u.ofdm.constellation = QAM_32;
+ break;
+ case SC_QAM16:
+ fe_params->u.ofdm.constellation = QAM_16;
+ break;
+ case SC_QAM4:
+ case SC_QAM4NR:
+ fe_params->u.ofdm.constellation = QPSK;
+ break;
+ default:
+ fe_params->u.ofdm.constellation = QAM_64;
+ }
+
+ /* transmission mode */
+ fe_params->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
+
+ /* guard interval */
+ fe_params->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
+
+ /* hierarchy */
+ fe_params->u.ofdm.hierarchy_information = HIERARCHY_NONE;
+
+ return 0;
+}
+
+static
+int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings *fesettings)
+{
+ /* FIXME: copy from tda1004x.c */
+ fesettings->min_delay_ms = 800;
+ fesettings->step_size = 0;
+ fesettings->max_drift = 0;
+ return 0;
+}
+
+static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+ s8 ret;
+ u8 t;
+
+ dprintk("%s\n", __func__);
+
+ ret = lgs8gxx_read_reg(priv, 0x4B, &t);
+ if (ret != 0)
+ return -EIO;
+
+ dprintk("Reg 0x4B: 0x%02X\n", t);
+
+ *fe_status = 0;
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
+ if ((t & 0x40) == 0x40)
+ *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
+ if ((t & 0x80) == 0x80)
+ *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
+ FE_HAS_LOCK;
+ } else {
+ if ((t & 0x80) == 0x80)
+ *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+ }
+
+ /* success */
+ dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
+ return 0;
+}
+
+static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
+{
+ u16 v;
+ u8 agc_lvl[2], cat;
+
+ dprintk("%s()\n", __func__);
+ lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
+ lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
+
+ v = agc_lvl[0];
+ v <<= 8;
+ v |= agc_lvl[1];
+
+ dprintk("agc_lvl: 0x%04X\n", v);
+
+ if (v < 0x100)
+ cat = 0;
+ else if (v < 0x190)
+ cat = 5;
+ else if (v < 0x2A8)
+ cat = 4;
+ else if (v < 0x381)
+ cat = 3;
+ else if (v < 0x400)
+ cat = 2;
+ else if (v == 0x400)
+ cat = 1;
+ else
+ cat = 0;
+
+ *signal = cat;
+
+ return 0;
+}
+
+static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
+{
+ u8 t; s8 ret;
+ s16 max_strength = 0;
+ u8 str;
+ u16 i, gi = priv->curr_gi;
+
+ dprintk("%s\n", __func__);
+
+ ret = lgs8gxx_read_reg(priv, 0x4B, &t);
+ if (ret != 0)
+ return -EIO;
+
+ if (fake_signal_str) {
+ if ((t & 0xC0) == 0xC0) {
+ dprintk("Fake signal strength as 50\n");
+ *signal = 0x32;
+ } else
+ *signal = 0;
+ return 0;
+ }
+
+ dprintk("gi = %d\n", gi);
+ for (i = 0; i < gi; i++) {
+
+ if ((i & 0xFF) == 0)
+ lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
+ lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
+
+ lgs8gxx_read_reg(priv, 0x94, &str);
+ if (max_strength < str)
+ max_strength = str;
+ }
+
+ *signal = max_strength;
+ dprintk("%s: signal=0x%02X\n", __func__, *signal);
+
+ lgs8gxx_read_reg(priv, 0x95, &t);
+ dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
+
+ return 0;
+}
+
+static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+
+ if (priv->config->prod == LGS8GXX_PROD_LGS8913)
+ return lgs8913_read_signal_strength(priv, signal);
+ else
+ return lgs8gxx_read_signal_agc(priv, signal);
+}
+
+static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+ u8 t;
+ *snr = 0;
+
+ lgs8gxx_read_reg(priv, 0x95, &t);
+ dprintk("AVG Noise=0x%02X\n", t);
+ *snr = 256 - t;
+ *snr <<= 8;
+ dprintk("snr=0x%x\n", *snr);
+
+ return 0;
+}
+
+static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ *ucblocks = 0;
+ dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
+ return 0;
+}
+
+static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+ u8 r0, r1, r2, r3;
+ u32 total_cnt, err_cnt;
+
+ dprintk("%s\n", __func__);
+
+ lgs8gxx_write_reg(priv, 0xc6, 0x01);
+ lgs8gxx_write_reg(priv, 0xc6, 0x41);
+ lgs8gxx_write_reg(priv, 0xc6, 0x01);
+
+ msleep(200);
+
+ lgs8gxx_write_reg(priv, 0xc6, 0x81);
+ lgs8gxx_read_reg(priv, 0xd0, &r0);
+ lgs8gxx_read_reg(priv, 0xd1, &r1);
+ lgs8gxx_read_reg(priv, 0xd2, &r2);
+ lgs8gxx_read_reg(priv, 0xd3, &r3);
+ total_cnt = (r3 << 24) | (r2 << 16) | (r1 << 8) | (r0);
+ lgs8gxx_read_reg(priv, 0xd4, &r0);
+ lgs8gxx_read_reg(priv, 0xd5, &r1);
+ lgs8gxx_read_reg(priv, 0xd6, &r2);
+ lgs8gxx_read_reg(priv, 0xd7, &r3);
+ err_cnt = (r3 << 24) | (r2 << 16) | (r1 << 8) | (r0);
+ dprintk("error=%d total=%d\n", err_cnt, total_cnt);
+
+ if (total_cnt == 0)
+ *ber = 0;
+ else
+ *ber = err_cnt * 100 / total_cnt;
+
+ dprintk("%s: ber=0x%x\n", __func__, *ber);
+ return 0;
+}
+
+static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+ struct lgs8gxx_state *priv = fe->demodulator_priv;
+
+ if (priv->config->tuner_address == 0)
+ return 0;
+ if (enable) {
+ u8 v = 0x80 | priv->config->tuner_address;
+ return lgs8gxx_write_reg(priv, 0x01, v);
+ }
+ return lgs8gxx_write_reg(priv, 0x01, 0);
+}
+
+static struct dvb_frontend_ops lgs8gxx_ops = {
+ .info = {
+ .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
+ .type = FE_OFDM,
+ .frequency_min = 474000000,
+ .frequency_max = 858000000,
+ .frequency_stepsize = 10000,
+ .caps =
+ FE_CAN_FEC_AUTO |
+ FE_CAN_QAM_AUTO |
+ FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_GUARD_INTERVAL_AUTO
+ },
+
+ .release = lgs8gxx_release,
+
+ .init = lgs8gxx_init,
+ .write = lgs8gxx_write,
+ .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
+
+ .set_frontend = lgs8gxx_set_fe,
+ .get_frontend = lgs8gxx_get_fe,
+ .get_tune_settings = lgs8gxx_get_tune_settings,
+
+ .read_status = lgs8gxx_read_status,
+ .read_ber = lgs8gxx_read_ber,
+ .read_signal_strength = lgs8gxx_read_signal_strength,
+ .read_snr = lgs8gxx_read_snr,
+ .read_ucblocks = lgs8gxx_read_ucblocks,
+};
+
+struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
+ struct i2c_adapter *i2c)
+{
+ struct lgs8gxx_state *priv = NULL;
+ u8 data = 0;
+
+ dprintk("%s()\n", __func__);
+
+ if (config == NULL || i2c == NULL)
+ return NULL;
+
+ priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
+ if (priv == NULL)
+ goto error_out;
+
+ priv->config = config;
+ priv->i2c = i2c;
+
+ /* check if the demod is there */
+ if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
+ dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
+ __func__, priv->config->demod_address);
+ goto error_out;
+ }
+
+ lgs8gxx_read_reg(priv, 1, &data);
+
+ memcpy(&priv->frontend.ops, &lgs8gxx_ops,
+ sizeof(struct dvb_frontend_ops));
+ priv->frontend.demodulator_priv = priv;
+
+ return &priv->frontend;
+
+error_out:
+ dprintk("%s() error_out\n", __func__);
+ kfree(priv);
+ return NULL;
+
+}
+EXPORT_SYMBOL(lgs8gxx_attach);
+
+MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
+MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
+MODULE_LICENSE("GPL");
Code Review / linux-2.6.git / commitdiff