--- /dev/null
+/*
+ * Montage M88TS2022 silicon tuner driver
+ *
+ * Copyright (C) 2013 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.
+ *
+ * Some calculations are taken from existing TS2020 driver.
+ */
+
+#include "m88ts2022_priv.h"
+
+/* write multiple registers */
+static int m88ts2022_wr_regs(struct m88ts2022_priv *priv,
+ u8 reg, const u8 *val, int len)
+{
+ int ret;
+ u8 buf[1 + len];
+ struct i2c_msg msg[1] = {
+ {
+ .addr = priv->cfg->i2c_addr,
+ .flags = 0,
+ .len = sizeof(buf),
+ .buf = buf,
+ }
+ };
+
+ buf[0] = reg;
+ memcpy(&buf[1], val, len);
+
+ ret = i2c_transfer(priv->i2c, msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ dev_warn(&priv->i2c->dev,
+ "%s: i2c wr failed=%d reg=%02x len=%d\n",
+ KBUILD_MODNAME, ret, reg, len);
+ ret = -EREMOTEIO;
+ }
+
+ return ret;
+}
+
+/* read multiple registers */
+static int m88ts2022_rd_regs(struct m88ts2022_priv *priv, u8 reg,
+ u8 *val, int len)
+{
+ int ret;
+ u8 buf[len];
+ struct i2c_msg msg[2] = {
+ {
+ .addr = priv->cfg->i2c_addr,
+ .flags = 0,
+ .len = 1,
+ .buf = ®,
+ }, {
+ .addr = priv->cfg->i2c_addr,
+ .flags = I2C_M_RD,
+ .len = sizeof(buf),
+ .buf = buf,
+ }
+ };
+
+ ret = i2c_transfer(priv->i2c, msg, 2);
+ if (ret == 2) {
+ memcpy(val, buf, len);
+ ret = 0;
+ } else {
+ dev_warn(&priv->i2c->dev,
+ "%s: i2c rd failed=%d reg=%02x len=%d\n",
+ KBUILD_MODNAME, ret, reg, len);
+ ret = -EREMOTEIO;
+ }
+
+ return ret;
+}
+
+/* write single register */
+static int m88ts2022_wr_reg(struct m88ts2022_priv *priv, u8 reg, u8 val)
+{
+ return m88ts2022_wr_regs(priv, reg, &val, 1);
+}
+
+/* read single register */
+static int m88ts2022_rd_reg(struct m88ts2022_priv *priv, u8 reg, u8 *val)
+{
+ return m88ts2022_rd_regs(priv, reg, val, 1);
+}
+
+/* write single register with mask */
+static int m88ts2022_wr_reg_mask(struct m88ts2022_priv *priv,
+ u8 reg, u8 val, u8 mask)
+{
+ int ret;
+ u8 u8tmp;
+
+ /* no need for read if whole reg is written */
+ if (mask != 0xff) {
+ ret = m88ts2022_rd_regs(priv, reg, &u8tmp, 1);
+ if (ret)
+ return ret;
+
+ val &= mask;
+ u8tmp &= ~mask;
+ val |= u8tmp;
+ }
+
+ return m88ts2022_wr_regs(priv, reg, &val, 1);
+}
+
+static int m88ts2022_cmd(struct dvb_frontend *fe,
+ int op, int sleep, u8 reg, u8 mask, u8 val, u8 *reg_val)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ int ret, i;
+ u8 u8tmp;
+ struct m88ts2022_reg_val reg_vals[] = {
+ {0x51, 0x1f - op},
+ {0x51, 0x1f},
+ {0x50, 0x00 + op},
+ {0x50, 0x00},
+ };
+
+ for (i = 0; i < 2; i++) {
+ dev_dbg(&priv->i2c->dev,
+ "%s: i=%d op=%02x reg=%02x mask=%02x val=%02x\n",
+ __func__, i, op, reg, mask, val);
+
+ for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
+ ret = m88ts2022_wr_reg(priv, reg_vals[i].reg,
+ reg_vals[i].val);
+ if (ret)
+ goto err;
+ }
+
+ usleep_range(sleep * 1000, sleep * 10000);
+
+ ret = m88ts2022_rd_reg(priv, reg, &u8tmp);
+ if (ret)
+ goto err;
+
+ if ((u8tmp & mask) != val)
+ break;
+ }
+
+ if (reg_val)
+ *reg_val = u8tmp;
+err:
+ return ret;
+}
+
+static int m88ts2022_set_params(struct dvb_frontend *fe)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret = 0, div;
+ u8 buf[3], u8tmp, cap_code, lpf_mxdiv, div_max, div_min;
+ u16 N_reg, N, K;
+ u32 lpf_gm, lpf_coeff, gdiv28, frequency_khz, frequency_offset;
+ u32 freq_3db;
+ dev_dbg(&priv->i2c->dev,
+ "%s: frequency=%d symbol_rate=%d rolloff=%d\n",
+ __func__, c->frequency, c->symbol_rate, c->rolloff);
+
+ if (c->symbol_rate < 5000000)
+ frequency_offset = 3000000; /* 3 MHz */
+ else
+ frequency_offset = 0;
+
+ frequency_khz = c->frequency + (frequency_offset / 1000);
+
+ if (frequency_khz < 1103000) {
+ div = 2;
+ u8tmp = 0x1b;
+ } else {
+ div = 1;
+ u8tmp = 0x0b;
+ }
+
+ buf[0] = u8tmp;
+ buf[1] = 0x40;
+ ret = m88ts2022_wr_regs(priv, 0x10, buf, 2);
+ if (ret)
+ goto err;
+
+ K = DIV_ROUND_CLOSEST((priv->cfg->clock / 2), 1000000);
+ N = 1ul * frequency_khz * K * div * 2 / (priv->cfg->clock / 1000);
+ N += N % 2;
+
+ if (N < 4095)
+ N_reg = N - 1024;
+ else if (N < 6143)
+ N_reg = N + 1024;
+ else
+ N_reg = N + 3072;
+
+ buf[0] = (N_reg >> 8) & 0x3f;
+ buf[1] = (N_reg >> 0) & 0xff;
+ buf[2] = K - 8;
+ ret = m88ts2022_wr_regs(priv, 0x01, buf, 3);
+ if (ret)
+ goto err;
+
+ priv->frequency_khz = 1ul * N * (priv->cfg->clock / 1000) / K / div / 2;
+
+ dev_dbg(&priv->i2c->dev,
+ "%s: frequency=%d offset=%d K=%d N=%d div=%d\n",
+ __func__, priv->frequency_khz,
+ priv->frequency_khz - c->frequency, K, N, div);
+
+ ret = m88ts2022_cmd(fe, 0x10, 5, 0x15, 0x40, 0x00, NULL);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_rd_reg(priv, 0x14, &u8tmp);
+ if (ret)
+ goto err;
+
+ u8tmp &= 0x7f;
+ if (u8tmp < 64) {
+ ret = m88ts2022_wr_reg_mask(priv, 0x10, 0x80, 0x80);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x11, 0x6f);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_cmd(fe, 0x10, 5, 0x15, 0x40, 0x00, NULL);
+ if (ret)
+ goto err;
+ }
+
+ ret = m88ts2022_rd_reg(priv, 0x14, &u8tmp);
+ if (ret)
+ goto err;
+
+ u8tmp &= 0x1f;
+ if (u8tmp > 19) {
+ ret = m88ts2022_wr_reg_mask(priv, 0x10, 0x00, 0x02);
+ if (ret)
+ goto err;
+ }
+
+ ret = m88ts2022_cmd(fe, 0x08, 5, 0x3c, 0xff, 0x00, NULL);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x25, 0x00);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x27, 0x70);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x41, 0x09);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x08, 0x0b);
+ if (ret)
+ goto err;
+
+ gdiv28 = DIV_ROUND_CLOSEST(priv->cfg->clock / 1000000 * 1694, 1000);
+
+ ret = m88ts2022_wr_reg(priv, 0x04, gdiv28);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+ if (ret)
+ goto err;
+
+ cap_code = u8tmp & 0x3f;
+
+ ret = m88ts2022_wr_reg(priv, 0x41, 0x0d);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+ if (ret)
+ goto err;
+
+ u8tmp &= 0x3f;
+ cap_code = (cap_code + u8tmp) / 2;
+ gdiv28 = gdiv28 * 207 / (cap_code * 2 + 151);
+ div_max = gdiv28 * 135 / 100;
+ div_min = gdiv28 * 78 / 100;
+ if (div_max > 63)
+ div_max = 63;
+
+ freq_3db = 1ul * c->symbol_rate * 135 / 200 + 2000000;
+ freq_3db += frequency_offset;
+ if (freq_3db < 7000000)
+ freq_3db = 7000000;
+ if (freq_3db > 40000000)
+ freq_3db = 40000000;
+
+ lpf_coeff = 3200;
+ lpf_gm = DIV_ROUND_CLOSEST(freq_3db * gdiv28, lpf_coeff *
+ (priv->cfg->clock / 1000));
+ if (lpf_gm > 23)
+ lpf_gm = 23;
+ if (lpf_gm < 1)
+ lpf_gm = 1;
+
+ lpf_mxdiv = DIV_ROUND_CLOSEST(lpf_gm * lpf_coeff *
+ (priv->cfg->clock / 1000), freq_3db);
+
+ if (lpf_mxdiv < div_min) {
+ lpf_gm++;
+ lpf_mxdiv = DIV_ROUND_CLOSEST(lpf_gm * lpf_coeff *
+ (priv->cfg->clock / 1000), freq_3db);
+ }
+
+ if (lpf_mxdiv > div_max)
+ lpf_mxdiv = div_max;
+
+ ret = m88ts2022_wr_reg(priv, 0x04, lpf_mxdiv);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x06, lpf_gm);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+ if (ret)
+ goto err;
+
+ cap_code = u8tmp & 0x3f;
+
+ ret = m88ts2022_wr_reg(priv, 0x41, 0x09);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+ if (ret)
+ goto err;
+
+ u8tmp &= 0x3f;
+ cap_code = (cap_code + u8tmp) / 2;
+
+ u8tmp = cap_code | 0x80;
+ ret = m88ts2022_wr_reg(priv, 0x25, u8tmp);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x27, 0x30);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x08, 0x09);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_cmd(fe, 0x01, 20, 0x21, 0xff, 0x00, NULL);
+ if (ret)
+ goto err;
+err:
+ if (ret)
+ dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+
+ return ret;
+}
+
+static int m88ts2022_init(struct dvb_frontend *fe)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ int ret, i;
+ u8 u8tmp;
+ static const struct m88ts2022_reg_val reg_vals[] = {
+ {0x7d, 0x9d},
+ {0x7c, 0x9a},
+ {0x7a, 0x76},
+ {0x3b, 0x01},
+ {0x63, 0x88},
+ {0x61, 0x85},
+ {0x22, 0x30},
+ {0x30, 0x40},
+ {0x20, 0x23},
+ {0x24, 0x02},
+ {0x12, 0xa0},
+ };
+ dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+ ret = m88ts2022_wr_reg(priv, 0x00, 0x01);
+ if (ret)
+ goto err;
+
+ ret = m88ts2022_wr_reg(priv, 0x00, 0x03);
+ if (ret)
+ goto err;
+
+ switch (priv->cfg->clock_out) {
+ case M88TS2022_CLOCK_OUT_DISABLED:
+ u8tmp = 0x60;
+ break;
+ case M88TS2022_CLOCK_OUT_ENABLED:
+ u8tmp = 0x70;
+ ret = m88ts2022_wr_reg(priv, 0x05, priv->cfg->clock_out_div);
+ if (ret)
+ goto err;
+ break;
+ case M88TS2022_CLOCK_OUT_ENABLED_XTALOUT:
+ u8tmp = 0x6c;
+ break;
+ default:
+ goto err;
+ }
+
+ ret = m88ts2022_wr_reg(priv, 0x42, u8tmp);
+ if (ret)
+ goto err;
+
+ if (priv->cfg->loop_through)
+ u8tmp = 0xec;
+ else
+ u8tmp = 0x6c;
+
+ ret = m88ts2022_wr_reg(priv, 0x62, u8tmp);
+ if (ret)
+ goto err;
+
+ for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
+ ret = m88ts2022_wr_reg(priv, reg_vals[i].reg, reg_vals[i].val);
+ if (ret)
+ goto err;
+ }
+err:
+ if (ret)
+ dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static int m88ts2022_sleep(struct dvb_frontend *fe)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ int ret;
+ dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+ ret = m88ts2022_wr_reg(priv, 0x00, 0x00);
+ if (ret)
+ goto err;
+err:
+ if (ret)
+ dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static int m88ts2022_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+ *frequency = priv->frequency_khz;
+ return 0;
+}
+
+static int m88ts2022_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+ *frequency = 0; /* Zero-IF */
+ return 0;
+}
+
+static int m88ts2022_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ u8 u8tmp, gain1, gain2, gain3;
+ u16 gain, u16tmp;
+ int ret;
+
+ ret = m88ts2022_rd_reg(priv, 0x3d, &u8tmp);
+ if (ret)
+ goto err;
+
+ gain1 = (u8tmp >> 0) & 0x1f;
+ if (gain1 > 15)
+ gain1 = 15;
+
+ ret = m88ts2022_rd_reg(priv, 0x21, &u8tmp);
+ if (ret)
+ goto err;
+
+ gain2 = (u8tmp >> 0) & 0x1f;
+ if (gain2 < 2)
+ gain2 = 2;
+ if (gain2 > 16)
+ gain2 = 16;
+
+ ret = m88ts2022_rd_reg(priv, 0x66, &u8tmp);
+ if (ret)
+ goto err;
+
+ gain3 = (u8tmp >> 3) & 0x07;
+ if (gain3 > 6)
+ gain3 = 6;
+
+ gain = gain1 * 265 + gain2 * 338 + gain3 * 285;
+
+ /* scale value to 0x0000-0xffff */
+ u16tmp = (0xffff - gain);
+ if (u16tmp < 59000)
+ u16tmp = 59000;
+ else if (u16tmp > 61500)
+ u16tmp = 61500;
+
+ *strength = (u16tmp - 59000) * 0xffff / (61500 - 59000);
+err:
+ if (ret)
+ dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static int m88ts2022_release(struct dvb_frontend *fe)
+{
+ struct m88ts2022_priv *priv = fe->tuner_priv;
+ dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+ kfree(fe->tuner_priv);
+ return 0;
+}
+
+static const struct dvb_tuner_ops m88ts2022_tuner_ops = {
+ .info = {
+ .name = "Montage M88TS2022",
+ .frequency_min = 950000,
+ .frequency_max = 2150000,
+ },
+
+ .release = m88ts2022_release,
+
+ .init = m88ts2022_init,
+ .sleep = m88ts2022_sleep,
+ .set_params = m88ts2022_set_params,
+
+ .get_frequency = m88ts2022_get_frequency,
+ .get_if_frequency = m88ts2022_get_if_frequency,
+ .get_rf_strength = m88ts2022_get_rf_strength,
+};
+
+struct dvb_frontend *m88ts2022_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct m88ts2022_config *cfg)
+{
+ struct m88ts2022_priv *priv;
+ int ret;
+ u8 chip_id, u8tmp;
+
+ priv = kzalloc(sizeof(struct m88ts2022_priv), GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
+ goto err;
+ }
+
+ priv->cfg = cfg;
+ priv->i2c = i2c;
+ priv->fe = fe;
+
+ /* check if the tuner is there */
+ ret = m88ts2022_rd_reg(priv, 0x00, &u8tmp);
+ if (ret)
+ goto err;
+
+ if ((u8tmp & 0x03) == 0x00) {
+ ret = m88ts2022_wr_reg(priv, 0x00, 0x01);
+ if (ret < 0)
+ goto err;
+
+ usleep_range(2000, 50000);
+ }
+
+ ret = m88ts2022_wr_reg(priv, 0x00, 0x03);
+ if (ret)
+ goto err;
+
+ usleep_range(2000, 50000);
+
+ ret = m88ts2022_rd_reg(priv, 0x00, &chip_id);
+ if (ret)
+ goto err;
+
+ dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id);
+
+ switch (chip_id) {
+ case 0xc3:
+ case 0x83:
+ break;
+ default:
+ goto err;
+ }
+
+ switch (priv->cfg->clock_out) {
+ case M88TS2022_CLOCK_OUT_DISABLED:
+ u8tmp = 0x60;
+ break;
+ case M88TS2022_CLOCK_OUT_ENABLED:
+ u8tmp = 0x70;
+ ret = m88ts2022_wr_reg(priv, 0x05, priv->cfg->clock_out_div);
+ if (ret)
+ goto err;
+ break;
+ case M88TS2022_CLOCK_OUT_ENABLED_XTALOUT:
+ u8tmp = 0x6c;
+ break;
+ default:
+ goto err;
+ }
+
+ ret = m88ts2022_wr_reg(priv, 0x42, u8tmp);
+ if (ret)
+ goto err;
+
+ if (priv->cfg->loop_through)
+ u8tmp = 0xec;
+ else
+ u8tmp = 0x6c;
+
+ ret = m88ts2022_wr_reg(priv, 0x62, u8tmp);
+ if (ret)
+ goto err;
+
+ /* sleep */
+ ret = m88ts2022_wr_reg(priv, 0x00, 0x00);
+ if (ret)
+ goto err;
+
+ dev_info(&priv->i2c->dev,
+ "%s: Montage M88TS2022 successfully identified\n",
+ KBUILD_MODNAME);
+
+ fe->tuner_priv = priv;
+ memcpy(&fe->ops.tuner_ops, &m88ts2022_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+err:
+ if (ret) {
+ dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
+ kfree(priv);
+ return NULL;
+ }
+
+ return fe;
+}
+EXPORT_SYMBOL(m88ts2022_attach);
+
+MODULE_DESCRIPTION("Montage M88TS2022 silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");
projects / linux-block.git / commitdiff