--- /dev/null
+/*
+ * 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.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
+/*
+ * Driver implements own I2C-adapter for tuner I2C access. That's since chip
+ * have unusual I2C-gate control which closes gate automatically after each
+ * I2C transfer. Using own I2C adapter we can workaround that.
+ */
+
+#include "rtl2830_priv.h"
+
+int rtl2830_debug;
+module_param_named(debug, rtl2830_debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+/* write multiple registers */
+static int rtl2830_wr_regs(struct rtl2830_priv *priv, u16 reg, u8 *val, int len)
+{
+ int ret;
+ u8 buf[2+len];
+ struct i2c_msg msg[1] = {
+ {
+ .addr = priv->cfg.i2c_addr,
+ .flags = 0,
+ .len = sizeof(buf),
+ .buf = buf,
+ }
+ };
+
+ buf[0] = (reg >> 8) & 0xff;
+ buf[1] = (reg >> 0) & 0xff;
+ memcpy(&buf[2], val, len);
+
+ ret = i2c_transfer(priv->i2c, msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ warn("i2c wr failed=%d reg=%04x len=%d", ret, reg, len);
+ ret = -EREMOTEIO;
+ }
+ return ret;
+}
+
+/* read multiple registers */
+static int rtl2830_rd_regs(struct rtl2830_priv *priv, u16 reg, u8 *val, int len)
+{
+ int ret;
+ u8 buf[2];
+ struct i2c_msg msg[2] = {
+ {
+ .addr = priv->cfg.i2c_addr,
+ .flags = 0,
+ .len = sizeof(buf),
+ .buf = buf,
+ }, {
+ .addr = priv->cfg.i2c_addr,
+ .flags = I2C_M_RD,
+ .len = len,
+ .buf = val,
+ }
+ };
+
+ buf[0] = (reg >> 8) & 0xff;
+ buf[1] = (reg >> 0) & 0xff;
+
+ ret = i2c_transfer(priv->i2c, msg, 2);
+ if (ret == 2) {
+ ret = 0;
+ } else {
+ warn("i2c rd failed=%d reg=%04x len=%d", ret, reg, len);
+ ret = -EREMOTEIO;
+ }
+ return ret;
+}
+
+#if 0 /* currently not used */
+/* write single register */
+static int rtl2830_wr_reg(struct rtl2830_priv *priv, u16 reg, u8 val)
+{
+ return rtl2830_wr_regs(priv, reg, &val, 1);
+}
+#endif
+
+/* read single register */
+static int rtl2830_rd_reg(struct rtl2830_priv *priv, u16 reg, u8 *val)
+{
+ return rtl2830_rd_regs(priv, reg, val, 1);
+}
+
+/* write single register with mask */
+int rtl2830_wr_reg_mask(struct rtl2830_priv *priv, u16 reg, u8 val, u8 mask)
+{
+ int ret;
+ u8 tmp;
+
+ /* no need for read if whole reg is written */
+ if (mask != 0xff) {
+ ret = rtl2830_rd_regs(priv, reg, &tmp, 1);
+ if (ret)
+ return ret;
+
+ val &= mask;
+ tmp &= ~mask;
+ val |= tmp;
+ }
+
+ return rtl2830_wr_regs(priv, reg, &val, 1);
+}
+
+/* read single register with mask */
+int rtl2830_rd_reg_mask(struct rtl2830_priv *priv, u16 reg, u8 *val, u8 mask)
+{
+ int ret, i;
+ u8 tmp;
+
+ ret = rtl2830_rd_regs(priv, reg, &tmp, 1);
+ if (ret)
+ return ret;
+
+ tmp &= mask;
+
+ /* find position of the first bit */
+ for (i = 0; i < 8; i++) {
+ if ((mask >> i) & 0x01)
+ break;
+ }
+ *val = tmp >> i;
+
+ return 0;
+}
+
+static int rtl2830_init(struct dvb_frontend *fe)
+{
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ int ret, i;
+ u64 num;
+ u8 buf[3], tmp;
+ u32 if_ctl;
+ 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, priv->cfg.vtop, 0x3f },
+ { 0x107, priv->cfg.krf, 0x3f },
+ { 0x112, 0x28, 0xff },
+ { 0x103, priv->cfg.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, priv->cfg.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_wr_reg_mask(priv, tab[i].reg, tab[i].val,
+ tab[i].mask);
+ if (ret)
+ goto err;
+ }
+
+ ret = rtl2830_wr_regs(priv, 0x18f, "\x28\x00", 2);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_wr_regs(priv, 0x195,
+ "\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8);
+ if (ret)
+ goto err;
+
+ num = priv->cfg.if_dvbt % priv->cfg.xtal;
+ num *= 0x400000;
+ num /= priv->cfg.xtal;
+ num = -num;
+ if_ctl = num & 0x3fffff;
+ dbg("%s: if_ctl=%08x", __func__, if_ctl);
+
+ ret = rtl2830_rd_reg_mask(priv, 0x119, &tmp, 0xc0); /* b[7:6] */
+ if (ret)
+ goto err;
+
+ buf[0] = tmp << 6;
+ buf[0] = (if_ctl >> 16) & 0x3f;
+ buf[1] = (if_ctl >> 8) & 0xff;
+ buf[2] = (if_ctl >> 0) & 0xff;
+
+ ret = rtl2830_wr_regs(priv, 0x119, buf, 3);
+ if (ret)
+ goto err;
+
+ /* TODO: spec init */
+
+ /* soft reset */
+ ret = rtl2830_wr_reg_mask(priv, 0x101, 0x04, 0x04);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_wr_reg_mask(priv, 0x101, 0x00, 0x04);
+ if (ret)
+ goto err;
+
+ return ret;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
+}
+
+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 * 2;
+ s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
+
+ return 0;
+}
+
+static int rtl2830_set_frontend(struct dvb_frontend *fe)
+{
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret, i;
+ static 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 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 */
+ };
+
+
+ dbg("%s: frequency=%d bandwidth_hz=%d inversion=%d", __func__,
+ 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:
+ dbg("invalid bandwidth");
+ return -EINVAL;
+ }
+
+ ret = rtl2830_wr_reg_mask(priv, 0x008, i << 1, 0x06);
+ if (ret)
+ goto err;
+
+ /* 1/2 split I2C write */
+ ret = rtl2830_wr_regs(priv, 0x11c, &bw_params1[i][0], 17);
+ if (ret)
+ goto err;
+
+ /* 2/2 split I2C write */
+ ret = rtl2830_wr_regs(priv, 0x12d, &bw_params1[i][17], 17);
+ if (ret)
+ goto err;
+
+ ret = rtl2830_wr_regs(priv, 0x19d, bw_params2[i], 6);
+ if (ret)
+ goto err;
+
+ return ret;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
+}
+
+static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ int ret;
+ u8 tmp;
+ *status = 0;
+
+ ret = rtl2830_rd_reg_mask(priv, 0x351, &tmp, 0x78); /* [6:3] */
+ if (ret)
+ goto err;
+
+ if (tmp == 11) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+ } else if (tmp == 10) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI;
+ }
+
+ return ret;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
+}
+
+static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ *snr = 0;
+ return 0;
+}
+
+static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ *ber = 0;
+ 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)
+{
+ *strength = 0;
+ return 0;
+}
+
+static struct dvb_frontend_ops rtl2830_ops;
+
+static u32 rtl2830_tuner_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C;
+}
+
+static int rtl2830_tuner_i2c_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg msg[], int num)
+{
+ struct rtl2830_priv *priv = i2c_get_adapdata(i2c_adap);
+ int ret;
+
+ /* open i2c-gate */
+ ret = rtl2830_wr_reg_mask(priv, 0x101, 0x08, 0x08);
+ if (ret)
+ goto err;
+
+ ret = i2c_transfer(priv->i2c, msg, num);
+ if (ret < 0)
+ warn("tuner i2c failed=%d", ret);
+
+ return ret;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
+}
+
+static struct i2c_algorithm rtl2830_tuner_i2c_algo = {
+ .master_xfer = rtl2830_tuner_i2c_xfer,
+ .functionality = rtl2830_tuner_i2c_func,
+};
+
+struct i2c_adapter *rtl2830_get_tuner_i2c_adapter(struct dvb_frontend *fe)
+{
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+ return &priv->tuner_i2c_adapter;
+}
+EXPORT_SYMBOL(rtl2830_get_tuner_i2c_adapter);
+
+static void rtl2830_release(struct dvb_frontend *fe)
+{
+ struct rtl2830_priv *priv = fe->demodulator_priv;
+
+ i2c_del_adapter(&priv->tuner_i2c_adapter);
+ kfree(priv);
+}
+
+struct dvb_frontend *rtl2830_attach(const struct rtl2830_config *cfg,
+ struct i2c_adapter *i2c)
+{
+ struct rtl2830_priv *priv = NULL;
+ int ret = 0;
+ u8 tmp;
+
+ /* allocate memory for the internal state */
+ priv = kzalloc(sizeof(struct rtl2830_priv), GFP_KERNEL);
+ if (priv == NULL)
+ goto err;
+
+ /* setup the priv */
+ priv->i2c = i2c;
+ memcpy(&priv->cfg, cfg, sizeof(struct rtl2830_config));
+
+ /* check if the demod is there */
+ ret = rtl2830_rd_reg(priv, 0x000, &tmp);
+ if (ret)
+ goto err;
+
+ /* create dvb_frontend */
+ memcpy(&priv->fe.ops, &rtl2830_ops, sizeof(struct dvb_frontend_ops));
+ priv->fe.demodulator_priv = priv;
+
+ /* create tuner i2c adapter */
+ strlcpy(priv->tuner_i2c_adapter.name, "RTL2830 tuner I2C adapter",
+ sizeof(priv->tuner_i2c_adapter.name));
+ priv->tuner_i2c_adapter.algo = &rtl2830_tuner_i2c_algo;
+ priv->tuner_i2c_adapter.algo_data = NULL;
+ i2c_set_adapdata(&priv->tuner_i2c_adapter, priv);
+ if (i2c_add_adapter(&priv->tuner_i2c_adapter) < 0) {
+ err("tuner I2C bus could not be initialized");
+ goto err;
+ }
+
+ return &priv->fe;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ kfree(priv);
+ return NULL;
+}
+EXPORT_SYMBOL(rtl2830_attach);
+
+static 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
+ },
+
+ .release = rtl2830_release,
+
+ .init = rtl2830_init,
+
+ .get_tune_settings = rtl2830_get_tune_settings,
+
+ .set_frontend = rtl2830_set_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,
+};
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver");
+MODULE_LICENSE("GPL");
projects / platform / kernel / linux-stable.git / commitdiff