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path: root/drivers/media/dvb-frontends/rtl2830.c
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-rw-r--r--drivers/media/dvb-frontends/rtl2830.c911
1 files changed, 911 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c
new file mode 100644
index 000000000..c06595684
--- /dev/null
+++ b/drivers/media/dvb-frontends/rtl2830.c
@@ -0,0 +1,911 @@
+/*
+ * Realtek RTL2830 DVB-T demodulator driver
+ *
+ * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
+ *
+ * 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.
+ *
+ */
+
+#include "rtl2830_priv.h"
+
+/* Our regmap is bypassing I2C adapter lock, thus we do it! */
+static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg,
+ const void *val, size_t val_count)
+{
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ int ret;
+
+ i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+ ret = regmap_bulk_write(dev->regmap, reg, val, val_count);
+ i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+ return ret;
+}
+
+static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ int ret;
+
+ i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+ ret = regmap_update_bits(dev->regmap, reg, mask, val);
+ i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+ return ret;
+}
+
+static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg,
+ void *val, size_t val_count)
+{
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ int ret;
+
+ i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
+ ret = regmap_bulk_read(dev->regmap, reg, val, val_count);
+ i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
+ return ret;
+}
+
+static int rtl2830_init(struct dvb_frontend *fe)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
+ int ret, i;
+ struct rtl2830_reg_val_mask tab[] = {
+ {0x00d, 0x01, 0x03},
+ {0x00d, 0x10, 0x10},
+ {0x104, 0x00, 0x1e},
+ {0x105, 0x80, 0x80},
+ {0x110, 0x02, 0x03},
+ {0x110, 0x08, 0x0c},
+ {0x17b, 0x00, 0x40},
+ {0x17d, 0x05, 0x0f},
+ {0x17d, 0x50, 0xf0},
+ {0x18c, 0x08, 0x0f},
+ {0x18d, 0x00, 0xc0},
+ {0x188, 0x05, 0x0f},
+ {0x189, 0x00, 0xfc},
+ {0x2d5, 0x02, 0x02},
+ {0x2f1, 0x02, 0x06},
+ {0x2f1, 0x20, 0xf8},
+ {0x16d, 0x00, 0x01},
+ {0x1a6, 0x00, 0x80},
+ {0x106, dev->pdata->vtop, 0x3f},
+ {0x107, dev->pdata->krf, 0x3f},
+ {0x112, 0x28, 0xff},
+ {0x103, dev->pdata->agc_targ_val, 0xff},
+ {0x00a, 0x02, 0x07},
+ {0x140, 0x0c, 0x3c},
+ {0x140, 0x40, 0xc0},
+ {0x15b, 0x05, 0x07},
+ {0x15b, 0x28, 0x38},
+ {0x15c, 0x05, 0x07},
+ {0x15c, 0x28, 0x38},
+ {0x115, dev->pdata->spec_inv, 0x01},
+ {0x16f, 0x01, 0x07},
+ {0x170, 0x18, 0x38},
+ {0x172, 0x0f, 0x0f},
+ {0x173, 0x08, 0x38},
+ {0x175, 0x01, 0x07},
+ {0x176, 0x00, 0xc0},
+ };
+
+ for (i = 0; i < ARRAY_SIZE(tab); i++) {
+ ret = rtl2830_update_bits(client, tab[i].reg, tab[i].mask,
+ tab[i].val);
+ if (ret)
+ goto err;
+ }
+
+ ret = rtl2830_bulk_write(client, 0x18f, "\x28\x00", 2);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_bulk_write(client, 0x195,
+ "\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8);
+ if (ret)
+ goto err;
+
+ /* TODO: spec init */
+
+ /* soft reset */
+ ret = rtl2830_update_bits(client, 0x101, 0x04, 0x04);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_update_bits(client, 0x101, 0x04, 0x00);
+ if (ret)
+ goto err;
+
+ /* init stats here in order signal app which stats are supported */
+ c->strength.len = 1;
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ 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;
+
+ dev->sleeping = false;
+
+ return ret;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int rtl2830_sleep(struct dvb_frontend *fe)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+
+ dev->sleeping = true;
+ dev->fe_status = 0;
+
+ return 0;
+}
+
+static int rtl2830_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings *s)
+{
+ s->min_delay_ms = 500;
+ s->step_size = fe->ops.info.frequency_stepsize_hz * 2;
+ s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;
+
+ return 0;
+}
+
+static int rtl2830_set_frontend(struct dvb_frontend *fe)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret, i;
+ u64 num;
+ u8 buf[3], u8tmp;
+ u32 if_ctl, if_frequency;
+ static const u8 bw_params1[3][34] = {
+ {
+ 0x1f, 0xf0, 0x1f, 0xf0, 0x1f, 0xfa, 0x00, 0x17, 0x00, 0x41,
+ 0x00, 0x64, 0x00, 0x67, 0x00, 0x38, 0x1f, 0xde, 0x1f, 0x7a,
+ 0x1f, 0x47, 0x1f, 0x7c, 0x00, 0x30, 0x01, 0x4b, 0x02, 0x82,
+ 0x03, 0x73, 0x03, 0xcf, /* 6 MHz */
+ }, {
+ 0x1f, 0xfa, 0x1f, 0xda, 0x1f, 0xc1, 0x1f, 0xb3, 0x1f, 0xca,
+ 0x00, 0x07, 0x00, 0x4d, 0x00, 0x6d, 0x00, 0x40, 0x1f, 0xca,
+ 0x1f, 0x4d, 0x1f, 0x2a, 0x1f, 0xb2, 0x00, 0xec, 0x02, 0x7e,
+ 0x03, 0xd0, 0x04, 0x53, /* 7 MHz */
+ }, {
+ 0x00, 0x10, 0x00, 0x0e, 0x1f, 0xf7, 0x1f, 0xc9, 0x1f, 0xa0,
+ 0x1f, 0xa6, 0x1f, 0xec, 0x00, 0x4e, 0x00, 0x7d, 0x00, 0x3a,
+ 0x1f, 0x98, 0x1f, 0x10, 0x1f, 0x40, 0x00, 0x75, 0x02, 0x5f,
+ 0x04, 0x24, 0x04, 0xdb, /* 8 MHz */
+ },
+ };
+ static const u8 bw_params2[3][6] = {
+ {0xc3, 0x0c, 0x44, 0x33, 0x33, 0x30}, /* 6 MHz */
+ {0xb8, 0xe3, 0x93, 0x99, 0x99, 0x98}, /* 7 MHz */
+ {0xae, 0xba, 0xf3, 0x26, 0x66, 0x64}, /* 8 MHz */
+ };
+
+ dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n",
+ c->frequency, c->bandwidth_hz, c->inversion);
+
+ /* program tuner */
+ if (fe->ops.tuner_ops.set_params)
+ fe->ops.tuner_ops.set_params(fe);
+
+ switch (c->bandwidth_hz) {
+ case 6000000:
+ i = 0;
+ break;
+ case 7000000:
+ i = 1;
+ break;
+ case 8000000:
+ i = 2;
+ break;
+ default:
+ dev_err(&client->dev, "invalid bandwidth_hz %u\n",
+ c->bandwidth_hz);
+ return -EINVAL;
+ }
+
+ ret = rtl2830_update_bits(client, 0x008, 0x06, i << 1);
+ if (ret)
+ goto err;
+
+ /* program if frequency */
+ if (fe->ops.tuner_ops.get_if_frequency)
+ ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
+ else
+ ret = -EINVAL;
+ if (ret)
+ goto err;
+
+ num = if_frequency % dev->pdata->clk;
+ num *= 0x400000;
+ num = div_u64(num, dev->pdata->clk);
+ num = -num;
+ if_ctl = num & 0x3fffff;
+ dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n",
+ if_frequency, if_ctl);
+
+ buf[0] = (if_ctl >> 16) & 0x3f;
+ buf[1] = (if_ctl >> 8) & 0xff;
+ buf[2] = (if_ctl >> 0) & 0xff;
+
+ ret = rtl2830_bulk_read(client, 0x119, &u8tmp, 1);
+ if (ret)
+ goto err;
+
+ buf[0] |= u8tmp & 0xc0; /* [7:6] */
+
+ ret = rtl2830_bulk_write(client, 0x119, buf, 3);
+ if (ret)
+ goto err;
+
+ /* 1/2 split I2C write */
+ ret = rtl2830_bulk_write(client, 0x11c, &bw_params1[i][0], 17);
+ if (ret)
+ goto err;
+
+ /* 2/2 split I2C write */
+ ret = rtl2830_bulk_write(client, 0x12d, &bw_params1[i][17], 17);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_bulk_write(client, 0x19d, bw_params2[i], 6);
+ if (ret)
+ goto err;
+
+ return ret;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int rtl2830_get_frontend(struct dvb_frontend *fe,
+ struct dtv_frontend_properties *c)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ int ret;
+ u8 buf[3];
+
+ if (dev->sleeping)
+ return 0;
+
+ ret = rtl2830_bulk_read(client, 0x33c, buf, 2);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_bulk_read(client, 0x351, &buf[2], 1);
+ if (ret)
+ goto err;
+
+ dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf);
+
+ switch ((buf[0] >> 2) & 3) {
+ case 0:
+ c->modulation = QPSK;
+ break;
+ case 1:
+ c->modulation = QAM_16;
+ break;
+ case 2:
+ c->modulation = QAM_64;
+ break;
+ }
+
+ switch ((buf[2] >> 2) & 1) {
+ case 0:
+ c->transmission_mode = TRANSMISSION_MODE_2K;
+ break;
+ case 1:
+ c->transmission_mode = TRANSMISSION_MODE_8K;
+ }
+
+ switch ((buf[2] >> 0) & 3) {
+ case 0:
+ c->guard_interval = GUARD_INTERVAL_1_32;
+ break;
+ case 1:
+ c->guard_interval = GUARD_INTERVAL_1_16;
+ break;
+ case 2:
+ c->guard_interval = GUARD_INTERVAL_1_8;
+ break;
+ case 3:
+ c->guard_interval = GUARD_INTERVAL_1_4;
+ break;
+ }
+
+ switch ((buf[0] >> 4) & 7) {
+ case 0:
+ c->hierarchy = HIERARCHY_NONE;
+ break;
+ case 1:
+ c->hierarchy = HIERARCHY_1;
+ break;
+ case 2:
+ c->hierarchy = HIERARCHY_2;
+ break;
+ case 3:
+ c->hierarchy = HIERARCHY_4;
+ break;
+ }
+
+ switch ((buf[1] >> 3) & 7) {
+ case 0:
+ c->code_rate_HP = FEC_1_2;
+ break;
+ case 1:
+ c->code_rate_HP = FEC_2_3;
+ break;
+ case 2:
+ c->code_rate_HP = FEC_3_4;
+ break;
+ case 3:
+ c->code_rate_HP = FEC_5_6;
+ break;
+ case 4:
+ c->code_rate_HP = FEC_7_8;
+ break;
+ }
+
+ switch ((buf[1] >> 0) & 7) {
+ case 0:
+ c->code_rate_LP = FEC_1_2;
+ break;
+ case 1:
+ c->code_rate_LP = FEC_2_3;
+ break;
+ case 2:
+ c->code_rate_LP = FEC_3_4;
+ break;
+ case 3:
+ c->code_rate_LP = FEC_5_6;
+ break;
+ case 4:
+ c->code_rate_LP = FEC_7_8;
+ break;
+ }
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int rtl2830_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
+ int ret, stmp;
+ unsigned int utmp;
+ u8 u8tmp, buf[2];
+
+ *status = 0;
+
+ if (dev->sleeping)
+ return 0;
+
+ ret = rtl2830_bulk_read(client, 0x351, &u8tmp, 1);
+ if (ret)
+ goto err;
+
+ u8tmp = (u8tmp >> 3) & 0x0f; /* [6:3] */
+ if (u8tmp == 11) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+ } else if (u8tmp == 10) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI;
+ }
+
+ dev->fe_status = *status;
+
+ /* Signal strength */
+ if (dev->fe_status & FE_HAS_SIGNAL) {
+ /* Read IF AGC */
+ ret = rtl2830_bulk_read(client, 0x359, buf, 2);
+ if (ret)
+ goto err;
+
+ stmp = buf[0] << 8 | buf[1] << 0;
+ stmp = sign_extend32(stmp, 13);
+ utmp = clamp_val(-4 * stmp + 32767, 0x0000, 0xffff);
+
+ dev_dbg(&client->dev, "IF AGC=%d\n", stmp);
+
+ c->strength.stat[0].scale = FE_SCALE_RELATIVE;
+ c->strength.stat[0].uvalue = utmp;
+ } else {
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ }
+
+ /* CNR */
+ if (dev->fe_status & FE_HAS_VITERBI) {
+ unsigned int hierarchy, constellation;
+ #define CONSTELLATION_NUM 3
+ #define HIERARCHY_NUM 4
+ static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
+ {70705899, 70705899, 70705899, 70705899},
+ {82433173, 82433173, 87483115, 94445660},
+ {92888734, 92888734, 95487525, 99770748},
+ };
+
+ ret = rtl2830_bulk_read(client, 0x33c, &u8tmp, 1);
+ if (ret)
+ goto err;
+
+ constellation = (u8tmp >> 2) & 0x03; /* [3:2] */
+ if (constellation > CONSTELLATION_NUM - 1)
+ goto err;
+
+ hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */
+ if (hierarchy > HIERARCHY_NUM - 1)
+ goto err;
+
+ ret = rtl2830_bulk_read(client, 0x40c, buf, 2);
+ if (ret)
+ goto err;
+
+ utmp = buf[0] << 8 | buf[1] << 0;
+ if (utmp)
+ stmp = (constant[constellation][hierarchy] -
+ intlog10(utmp)) / ((1 << 24) / 10000);
+ else
+ stmp = 0;
+
+ dev_dbg(&client->dev, "CNR raw=%u\n", utmp);
+
+ c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+ c->cnr.stat[0].svalue = stmp;
+ } else {
+ c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ }
+
+ /* BER */
+ if (dev->fe_status & FE_HAS_LOCK) {
+ ret = rtl2830_bulk_read(client, 0x34e, buf, 2);
+ if (ret)
+ goto err;
+
+ utmp = buf[0] << 8 | buf[1] << 0;
+ dev->post_bit_error += utmp;
+ dev->post_bit_count += 1000000;
+
+ dev_dbg(&client->dev, "BER errors=%u total=1000000\n", utmp);
+
+ c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+ c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
+ c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+ c->post_bit_count.stat[0].uvalue = dev->post_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 ret;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int rtl2830_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 rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+
+ *ber = (dev->post_bit_error - dev->post_bit_error_prev);
+ dev->post_bit_error_prev = dev->post_bit_error;
+
+ return 0;
+}
+
+static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ *ucblocks = 0;
+
+ return 0;
+}
+
+static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
+ *strength = c->strength.stat[0].uvalue;
+ else
+ *strength = 0;
+
+ return 0;
+}
+
+static const struct dvb_frontend_ops rtl2830_ops = {
+ .delsys = {SYS_DVBT},
+ .info = {
+ .name = "Realtek RTL2830 (DVB-T)",
+ .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_64 |
+ FE_CAN_QAM_AUTO |
+ FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_GUARD_INTERVAL_AUTO |
+ FE_CAN_HIERARCHY_AUTO |
+ FE_CAN_RECOVER |
+ FE_CAN_MUTE_TS
+ },
+
+ .init = rtl2830_init,
+ .sleep = rtl2830_sleep,
+
+ .get_tune_settings = rtl2830_get_tune_settings,
+
+ .set_frontend = rtl2830_set_frontend,
+ .get_frontend = rtl2830_get_frontend,
+
+ .read_status = rtl2830_read_status,
+ .read_snr = rtl2830_read_snr,
+ .read_ber = rtl2830_read_ber,
+ .read_ucblocks = rtl2830_read_ucblocks,
+ .read_signal_strength = rtl2830_read_signal_strength,
+};
+
+static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ int ret;
+ u8 u8tmp;
+
+ dev_dbg(&client->dev, "onoff=%d\n", onoff);
+
+ /* enable / disable PID filter */
+ if (onoff)
+ u8tmp = 0x80;
+ else
+ u8tmp = 0x00;
+
+ ret = rtl2830_update_bits(client, 0x061, 0x80, u8tmp);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int onoff)
+{
+ struct i2c_client *client = fe->demodulator_priv;
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ int ret;
+ u8 buf[4];
+
+ dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n",
+ index, pid, onoff);
+
+ /* skip invalid PIDs (0x2000) */
+ if (pid > 0x1fff || index > 32)
+ return 0;
+
+ if (onoff)
+ set_bit(index, &dev->filters);
+ else
+ clear_bit(index, &dev->filters);
+
+ /* enable / disable PIDs */
+ buf[0] = (dev->filters >> 0) & 0xff;
+ buf[1] = (dev->filters >> 8) & 0xff;
+ buf[2] = (dev->filters >> 16) & 0xff;
+ buf[3] = (dev->filters >> 24) & 0xff;
+ ret = rtl2830_bulk_write(client, 0x062, buf, 4);
+ if (ret)
+ goto err;
+
+ /* add PID */
+ buf[0] = (pid >> 8) & 0xff;
+ buf[1] = (pid >> 0) & 0xff;
+ ret = rtl2830_bulk_write(client, 0x066 + 2 * index, buf, 2);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+/*
+ * I2C gate/mux/repeater logic
+ * We must use unlocked __i2c_transfer() here (through regmap) because of I2C
+ * adapter lock is already taken by tuner driver.
+ * Gate is closed automatically after single I2C transfer.
+ */
+static int rtl2830_select(struct i2c_mux_core *muxc, u32 chan_id)
+{
+ struct i2c_client *client = i2c_mux_priv(muxc);
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+ int ret;
+
+ dev_dbg(&client->dev, "\n");
+
+ /* open I2C repeater for 1 transfer, closes automatically */
+ /* XXX: regmap_update_bits() does not lock I2C adapter */
+ ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client)
+{
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ return &dev->fe;
+}
+
+static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client)
+{
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ return dev->muxc->adapter[0];
+}
+
+/*
+ * We implement own I2C access routines for regmap in order to get manual access
+ * to I2C adapter lock, which is needed for I2C mux adapter.
+ */
+static int rtl2830_regmap_read(void *context, const void *reg_buf,
+ size_t reg_size, void *val_buf, size_t val_size)
+{
+ struct i2c_client *client = context;
+ int ret;
+ struct i2c_msg msg[2] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = reg_size,
+ .buf = (u8 *)reg_buf,
+ }, {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .len = val_size,
+ .buf = val_buf,
+ }
+ };
+
+ ret = __i2c_transfer(client->adapter, msg, 2);
+ if (ret != 2) {
+ dev_warn(&client->dev, "i2c reg read failed %d\n", ret);
+ if (ret >= 0)
+ ret = -EREMOTEIO;
+ return ret;
+ }
+ return 0;
+}
+
+static int rtl2830_regmap_write(void *context, const void *data, size_t count)
+{
+ struct i2c_client *client = context;
+ int ret;
+ struct i2c_msg msg[1] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = count,
+ .buf = (u8 *)data,
+ }
+ };
+
+ ret = __i2c_transfer(client->adapter, msg, 1);
+ if (ret != 1) {
+ dev_warn(&client->dev, "i2c reg write failed %d\n", ret);
+ if (ret >= 0)
+ ret = -EREMOTEIO;
+ return ret;
+ }
+ return 0;
+}
+
+static int rtl2830_regmap_gather_write(void *context, const void *reg,
+ size_t reg_len, const void *val,
+ size_t val_len)
+{
+ struct i2c_client *client = context;
+ int ret;
+ u8 buf[256];
+ struct i2c_msg msg[1] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1 + val_len,
+ .buf = buf,
+ }
+ };
+
+ buf[0] = *(u8 const *)reg;
+ memcpy(&buf[1], val, val_len);
+
+ ret = __i2c_transfer(client->adapter, msg, 1);
+ if (ret != 1) {
+ dev_warn(&client->dev, "i2c reg write failed %d\n", ret);
+ if (ret >= 0)
+ ret = -EREMOTEIO;
+ return ret;
+ }
+ return 0;
+}
+
+static int rtl2830_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct rtl2830_platform_data *pdata = client->dev.platform_data;
+ struct rtl2830_dev *dev;
+ int ret;
+ u8 u8tmp;
+ static const struct regmap_bus regmap_bus = {
+ .read = rtl2830_regmap_read,
+ .write = rtl2830_regmap_write,
+ .gather_write = rtl2830_regmap_gather_write,
+ .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
+ };
+ static const struct regmap_range_cfg regmap_range_cfg[] = {
+ {
+ .selector_reg = 0x00,
+ .selector_mask = 0xff,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 0x100,
+ .range_min = 0 * 0x100,
+ .range_max = 5 * 0x100,
+ },
+ };
+ static const struct regmap_config regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 5 * 0x100,
+ .ranges = regmap_range_cfg,
+ .num_ranges = ARRAY_SIZE(regmap_range_cfg),
+ };
+
+ dev_dbg(&client->dev, "\n");
+
+ if (pdata == NULL) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* allocate memory for the internal state */
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* setup the state */
+ i2c_set_clientdata(client, dev);
+ dev->client = client;
+ dev->pdata = client->dev.platform_data;
+ dev->sleeping = true;
+ dev->regmap = regmap_init(&client->dev, &regmap_bus, client,
+ &regmap_config);
+ if (IS_ERR(dev->regmap)) {
+ ret = PTR_ERR(dev->regmap);
+ goto err_kfree;
+ }
+
+ /* check if the demod is there */
+ ret = rtl2830_bulk_read(client, 0x000, &u8tmp, 1);
+ if (ret)
+ goto err_regmap_exit;
+
+ /* create muxed i2c adapter for tuner */
+ dev->muxc = i2c_mux_alloc(client->adapter, &client->dev, 1, 0, 0,
+ rtl2830_select, NULL);
+ if (!dev->muxc) {
+ ret = -ENOMEM;
+ goto err_regmap_exit;
+ }
+ dev->muxc->priv = client;
+ ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
+ if (ret)
+ goto err_regmap_exit;
+
+ /* create dvb frontend */
+ memcpy(&dev->fe.ops, &rtl2830_ops, sizeof(dev->fe.ops));
+ dev->fe.demodulator_priv = client;
+
+ /* setup callbacks */
+ pdata->get_dvb_frontend = rtl2830_get_dvb_frontend;
+ pdata->get_i2c_adapter = rtl2830_get_i2c_adapter;
+ pdata->pid_filter = rtl2830_pid_filter;
+ pdata->pid_filter_ctrl = rtl2830_pid_filter_ctrl;
+
+ dev_info(&client->dev, "Realtek RTL2830 successfully attached\n");
+
+ return 0;
+err_regmap_exit:
+ regmap_exit(dev->regmap);
+err_kfree:
+ kfree(dev);
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int rtl2830_remove(struct i2c_client *client)
+{
+ struct rtl2830_dev *dev = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ i2c_mux_del_adapters(dev->muxc);
+ regmap_exit(dev->regmap);
+ kfree(dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id rtl2830_id_table[] = {
+ {"rtl2830", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, rtl2830_id_table);
+
+static struct i2c_driver rtl2830_driver = {
+ .driver = {
+ .name = "rtl2830",
+ .suppress_bind_attrs = true,
+ },
+ .probe = rtl2830_probe,
+ .remove = rtl2830_remove,
+ .id_table = rtl2830_id_table,
+};
+
+module_i2c_driver(rtl2830_driver);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 05:39:39 +0000