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path: root/drivers/media/tuners/tuner_it913x.c
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Diffstat (limited to 'drivers/media/tuners/tuner_it913x.c')
-rw-r--r--drivers/media/tuners/tuner_it913x.c447
1 files changed, 447 insertions, 0 deletions
diff --git a/drivers/media/tuners/tuner_it913x.c b/drivers/media/tuners/tuner_it913x.c
new file mode 100644
index 000000000000..6f30d7e535b8
--- /dev/null
+++ b/drivers/media/tuners/tuner_it913x.c
@@ -0,0 +1,447 @@
+/*
+ * ITE Tech IT9137 silicon tuner driver
+ *
+ * Copyright (C) 2011 Malcolm Priestley (tvboxspy@gmail.com)
+ * IT9137 Copyright (C) ITE Tech Inc.
+ *
+ * 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 "tuner_it913x_priv.h"
+
+struct it913x_state {
+ struct i2c_adapter *i2c_adap;
+ u8 i2c_addr;
+ u8 chip_ver;
+ u8 tuner_type;
+ u8 firmware_ver;
+ u16 tun_xtal;
+ u8 tun_fdiv;
+ u8 tun_clk_mode;
+ u32 tun_fn_min;
+};
+
+/* read multiple registers */
+static int it913x_rd_regs(struct it913x_state *state,
+ u32 reg, u8 *data, u8 count)
+{
+ int ret;
+ u8 b[3];
+ struct i2c_msg msg[2] = {
+ { .addr = state->i2c_addr, .flags = 0,
+ .buf = b, .len = sizeof(b) },
+ { .addr = state->i2c_addr, .flags = I2C_M_RD,
+ .buf = data, .len = count }
+ };
+ b[0] = (u8)(reg >> 16) & 0xff;
+ b[1] = (u8)(reg >> 8) & 0xff;
+ b[2] = (u8) reg & 0xff;
+ b[0] |= 0x80; /* All reads from demodulator */
+
+ ret = i2c_transfer(state->i2c_adap, msg, 2);
+
+ return ret;
+}
+
+/* read single register */
+static int it913x_rd_reg(struct it913x_state *state, u32 reg)
+{
+ int ret;
+ u8 b[1];
+ ret = it913x_rd_regs(state, reg, &b[0], sizeof(b));
+ return (ret < 0) ? -ENODEV : b[0];
+}
+
+/* write multiple registers */
+static int it913x_wr_regs(struct it913x_state *state,
+ u8 pro, u32 reg, u8 buf[], u8 count)
+{
+ u8 b[256];
+ struct i2c_msg msg[1] = {
+ { .addr = state->i2c_addr, .flags = 0,
+ .buf = b, .len = 3 + count }
+ };
+ int ret;
+ b[0] = (u8)(reg >> 16) & 0xff;
+ b[1] = (u8)(reg >> 8) & 0xff;
+ b[2] = (u8) reg & 0xff;
+ memcpy(&b[3], buf, count);
+
+ if (pro == PRO_DMOD)
+ b[0] |= 0x80;
+
+ ret = i2c_transfer(state->i2c_adap, msg, 1);
+
+ if (ret < 0)
+ return -EIO;
+
+ return 0;
+}
+
+/* write single register */
+static int it913x_wr_reg(struct it913x_state *state,
+ u8 pro, u32 reg, u32 data)
+{
+ int ret;
+ u8 b[4];
+ u8 s;
+
+ b[0] = data >> 24;
+ b[1] = (data >> 16) & 0xff;
+ b[2] = (data >> 8) & 0xff;
+ b[3] = data & 0xff;
+ /* expand write as needed */
+ if (data < 0x100)
+ s = 3;
+ else if (data < 0x1000)
+ s = 2;
+ else if (data < 0x100000)
+ s = 1;
+ else
+ s = 0;
+
+ ret = it913x_wr_regs(state, pro, reg, &b[s], sizeof(b) - s);
+
+ return ret;
+}
+
+static int it913x_script_loader(struct it913x_state *state,
+ struct it913xset *loadscript)
+{
+ int ret, i;
+ if (loadscript == NULL)
+ return -EINVAL;
+
+ for (i = 0; i < 1000; ++i) {
+ if (loadscript[i].pro == 0xff)
+ break;
+ ret = it913x_wr_regs(state, loadscript[i].pro,
+ loadscript[i].address,
+ loadscript[i].reg, loadscript[i].count);
+ if (ret < 0)
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int it913x_init(struct dvb_frontend *fe)
+{
+ struct it913x_state *state = fe->tuner_priv;
+ int ret, i, reg;
+ u8 val, nv_val;
+ u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2};
+ u8 b[2];
+
+ reg = it913x_rd_reg(state, 0xec86);
+ switch (reg) {
+ case 0:
+ state->tun_clk_mode = reg;
+ state->tun_xtal = 2000;
+ state->tun_fdiv = 3;
+ val = 16;
+ break;
+ case -ENODEV:
+ return -ENODEV;
+ case 1:
+ default:
+ state->tun_clk_mode = reg;
+ state->tun_xtal = 640;
+ state->tun_fdiv = 1;
+ val = 6;
+ break;
+ }
+
+ reg = it913x_rd_reg(state, 0xed03);
+
+ if (reg < 0)
+ return -ENODEV;
+ else if (reg < ARRAY_SIZE(nv))
+ nv_val = nv[reg];
+ else
+ nv_val = 2;
+
+ for (i = 0; i < 50; i++) {
+ ret = it913x_rd_regs(state, 0xed23, &b[0], sizeof(b));
+ reg = (b[1] << 8) + b[0];
+ if (reg > 0)
+ break;
+ if (ret < 0)
+ return -ENODEV;
+ udelay(2000);
+ }
+ state->tun_fn_min = state->tun_xtal * reg;
+ state->tun_fn_min /= (state->tun_fdiv * nv_val);
+ dev_dbg(&state->i2c_adap->dev, "%s: Tuner fn_min %d\n", __func__,
+ state->tun_fn_min);
+
+ if (state->chip_ver > 1)
+ msleep(50);
+ else {
+ for (i = 0; i < 50; i++) {
+ reg = it913x_rd_reg(state, 0xec82);
+ if (reg > 0)
+ break;
+ if (reg < 0)
+ return -ENODEV;
+ udelay(2000);
+ }
+ }
+
+ /* Power Up Tuner - common all versions */
+ ret = it913x_wr_reg(state, PRO_DMOD, 0xec40, 0x1);
+ ret |= it913x_wr_reg(state, PRO_DMOD, 0xfba8, 0x0);
+ ret |= it913x_wr_reg(state, PRO_DMOD, 0xec57, 0x0);
+ ret |= it913x_wr_reg(state, PRO_DMOD, 0xec58, 0x0);
+
+ return it913x_wr_reg(state, PRO_DMOD, 0xed81, val);
+}
+
+static int it9137_set_params(struct dvb_frontend *fe)
+{
+ struct it913x_state *state = fe->tuner_priv;
+ struct it913xset *set_tuner = set_it9137_template;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ u32 bandwidth = p->bandwidth_hz;
+ u32 frequency_m = p->frequency;
+ int ret, reg;
+ u32 frequency = frequency_m / 1000;
+ u32 freq, temp_f, tmp;
+ u16 iqik_m_cal;
+ u16 n_div;
+ u8 n;
+ u8 l_band;
+ u8 lna_band;
+ u8 bw;
+
+ if (state->firmware_ver == 1)
+ set_tuner = set_it9135_template;
+ else
+ set_tuner = set_it9137_template;
+
+ dev_dbg(&state->i2c_adap->dev, "%s: Tuner Frequency %d Bandwidth %d\n",
+ __func__, frequency, bandwidth);
+
+ if (frequency >= 51000 && frequency <= 440000) {
+ l_band = 0;
+ lna_band = 0;
+ } else if (frequency > 440000 && frequency <= 484000) {
+ l_band = 1;
+ lna_band = 1;
+ } else if (frequency > 484000 && frequency <= 533000) {
+ l_band = 1;
+ lna_band = 2;
+ } else if (frequency > 533000 && frequency <= 587000) {
+ l_band = 1;
+ lna_band = 3;
+ } else if (frequency > 587000 && frequency <= 645000) {
+ l_band = 1;
+ lna_band = 4;
+ } else if (frequency > 645000 && frequency <= 710000) {
+ l_band = 1;
+ lna_band = 5;
+ } else if (frequency > 710000 && frequency <= 782000) {
+ l_band = 1;
+ lna_band = 6;
+ } else if (frequency > 782000 && frequency <= 860000) {
+ l_band = 1;
+ lna_band = 7;
+ } else if (frequency > 1450000 && frequency <= 1492000) {
+ l_band = 1;
+ lna_band = 0;
+ } else if (frequency > 1660000 && frequency <= 1685000) {
+ l_band = 1;
+ lna_band = 1;
+ } else
+ return -EINVAL;
+ set_tuner[0].reg[0] = lna_band;
+
+ switch (bandwidth) {
+ case 5000000:
+ bw = 0;
+ break;
+ case 6000000:
+ bw = 2;
+ break;
+ case 7000000:
+ bw = 4;
+ break;
+ default:
+ case 8000000:
+ bw = 6;
+ break;
+ }
+
+ set_tuner[1].reg[0] = bw;
+ set_tuner[2].reg[0] = 0xa0 | (l_band << 3);
+
+ if (frequency > 53000 && frequency <= 74000) {
+ n_div = 48;
+ n = 0;
+ } else if (frequency > 74000 && frequency <= 111000) {
+ n_div = 32;
+ n = 1;
+ } else if (frequency > 111000 && frequency <= 148000) {
+ n_div = 24;
+ n = 2;
+ } else if (frequency > 148000 && frequency <= 222000) {
+ n_div = 16;
+ n = 3;
+ } else if (frequency > 222000 && frequency <= 296000) {
+ n_div = 12;
+ n = 4;
+ } else if (frequency > 296000 && frequency <= 445000) {
+ n_div = 8;
+ n = 5;
+ } else if (frequency > 445000 && frequency <= state->tun_fn_min) {
+ n_div = 6;
+ n = 6;
+ } else if (frequency > state->tun_fn_min && frequency <= 950000) {
+ n_div = 4;
+ n = 7;
+ } else if (frequency > 1450000 && frequency <= 1680000) {
+ n_div = 2;
+ n = 0;
+ } else
+ return -EINVAL;
+
+ reg = it913x_rd_reg(state, 0xed81);
+ iqik_m_cal = (u16)reg * n_div;
+
+ if (reg < 0x20) {
+ if (state->tun_clk_mode == 0)
+ iqik_m_cal = (iqik_m_cal * 9) >> 5;
+ else
+ iqik_m_cal >>= 1;
+ } else {
+ iqik_m_cal = 0x40 - iqik_m_cal;
+ if (state->tun_clk_mode == 0)
+ iqik_m_cal = ~((iqik_m_cal * 9) >> 5);
+ else
+ iqik_m_cal = ~(iqik_m_cal >> 1);
+ }
+
+ temp_f = frequency * (u32)n_div * (u32)state->tun_fdiv;
+ freq = temp_f / state->tun_xtal;
+ tmp = freq * state->tun_xtal;
+
+ if ((temp_f - tmp) >= (state->tun_xtal >> 1))
+ freq++;
+
+ freq += (u32) n << 13;
+ /* Frequency OMEGA_IQIK_M_CAL_MID*/
+ temp_f = freq + (u32)iqik_m_cal;
+
+ set_tuner[3].reg[0] = temp_f & 0xff;
+ set_tuner[4].reg[0] = (temp_f >> 8) & 0xff;
+
+ dev_dbg(&state->i2c_adap->dev, "%s: High Frequency = %04x\n",
+ __func__, temp_f);
+
+ /* Lower frequency */
+ set_tuner[5].reg[0] = freq & 0xff;
+ set_tuner[6].reg[0] = (freq >> 8) & 0xff;
+
+ dev_dbg(&state->i2c_adap->dev, "%s: low Frequency = %04x\n",
+ __func__, freq);
+
+ ret = it913x_script_loader(state, set_tuner);
+
+ return (ret < 0) ? -ENODEV : 0;
+}
+
+/* Power sequence */
+/* Power Up Tuner on -> Frontend suspend off -> Tuner clk on */
+/* Power Down Frontend suspend on -> Tuner clk off -> Tuner off */
+
+static int it913x_sleep(struct dvb_frontend *fe)
+{
+ struct it913x_state *state = fe->tuner_priv;
+ return it913x_script_loader(state, it9137_tuner_off);
+}
+
+static int it913x_release(struct dvb_frontend *fe)
+{
+ kfree(fe->tuner_priv);
+ return 0;
+}
+
+static const struct dvb_tuner_ops it913x_tuner_ops = {
+ .info = {
+ .name = "ITE Tech IT913X",
+ .frequency_min = 174000000,
+ .frequency_max = 862000000,
+ },
+
+ .release = it913x_release,
+
+ .init = it913x_init,
+ .sleep = it913x_sleep,
+ .set_params = it9137_set_params,
+};
+
+struct dvb_frontend *it913x_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c_adap, u8 i2c_addr, u8 config)
+{
+ struct it913x_state *state = NULL;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct it913x_state), GFP_KERNEL);
+ if (state == NULL)
+ return NULL;
+
+ state->i2c_adap = i2c_adap;
+ state->i2c_addr = i2c_addr;
+
+ switch (config) {
+ case AF9033_TUNER_IT9135_38:
+ case AF9033_TUNER_IT9135_51:
+ case AF9033_TUNER_IT9135_52:
+ state->chip_ver = 0x01;
+ break;
+ case AF9033_TUNER_IT9135_60:
+ case AF9033_TUNER_IT9135_61:
+ case AF9033_TUNER_IT9135_62:
+ state->chip_ver = 0x02;
+ break;
+ default:
+ dev_dbg(&i2c_adap->dev,
+ "%s: invalid config=%02x\n", __func__, config);
+ goto error;
+ }
+
+ state->tuner_type = config;
+ state->firmware_ver = 1;
+
+ fe->tuner_priv = state;
+ memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ dev_info(&i2c_adap->dev,
+ "%s: ITE Tech IT913X successfully attached\n",
+ KBUILD_MODNAME);
+ dev_dbg(&i2c_adap->dev, "%s: config=%02x chip_ver=%02x\n",
+ __func__, config, state->chip_ver);
+
+ return fe;
+error:
+ kfree(state);
+ return NULL;
+}
+EXPORT_SYMBOL(it913x_attach);
+
+MODULE_DESCRIPTION("ITE Tech IT913X silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");

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