--- /dev/null
+/*
+ * Sharp QM1D1C0042 8PSK tuner driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
+ *
+ * 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 version 2.
+ *
+ *
+ * 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.
+ */
+
+/*
+ * NOTICE:
+ * As the disclosed information on the chip is very limited,
+ * this driver lacks some features, including chip config like IF freq.
+ * It assumes that users of this driver (such as a PCI bridge of
+ * DTV receiver cards) know the relevant info and
+ * configure the chip via I2C if necessary.
+ *
+ * Currently, PT3 driver is the only one that uses this driver,
+ * and contains init/config code in its firmware.
+ * Thus some part of the code might be dependent on PT3 specific config.
+ */
+
+#include <linux/kernel.h>
+#include "qm1d1c0042.h"
+
+#define QM1D1C0042_NUM_REGS 0x20
+
+static const u8 reg_initval[QM1D1C0042_NUM_REGS] = {
+ 0x48, 0x1c, 0xa0, 0x10, 0xbc, 0xc5, 0x20, 0x33,
+ 0x06, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+ 0x00, 0xff, 0xf3, 0x00, 0x2a, 0x64, 0xa6, 0x86,
+ 0x8c, 0xcf, 0xb8, 0xf1, 0xa8, 0xf2, 0x89, 0x00
+};
+
+static const struct qm1d1c0042_config default_cfg = {
+ .xtal_freq = 16000,
+ .lpf = 1,
+ .fast_srch = 0,
+ .lpf_wait = 20,
+ .fast_srch_wait = 4,
+ .normal_srch_wait = 15,
+};
+
+struct qm1d1c0042_state {
+ struct qm1d1c0042_config cfg;
+ struct i2c_client *i2c;
+ u8 regs[QM1D1C0042_NUM_REGS];
+};
+
+static struct qm1d1c0042_state *cfg_to_state(struct qm1d1c0042_config *c)
+{
+ return container_of(c, struct qm1d1c0042_state, cfg);
+}
+
+static int reg_write(struct qm1d1c0042_state *state, u8 reg, u8 val)
+{
+ u8 wbuf[2] = { reg, val };
+ int ret;
+
+ ret = i2c_master_send(state->i2c, wbuf, sizeof(wbuf));
+ if (ret >= 0 && ret < sizeof(wbuf))
+ ret = -EIO;
+ return (ret == sizeof(wbuf)) ? 0 : ret;
+}
+
+static int reg_read(struct qm1d1c0042_state *state, u8 reg, u8 *val)
+{
+ struct i2c_msg msgs[2] = {
+ {
+ .addr = state->i2c->addr,
+ .flags = 0,
+ .buf = ®,
+ .len = 1,
+ },
+ {
+ .addr = state->i2c->addr,
+ .flags = I2C_M_RD,
+ .buf = val,
+ .len = 1,
+ },
+ };
+ int ret;
+
+ ret = i2c_transfer(state->i2c->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret >= 0 && ret < ARRAY_SIZE(msgs))
+ ret = -EIO;
+ return (ret == ARRAY_SIZE(msgs)) ? 0 : ret;
+}
+
+
+static int qm1d1c0042_set_srch_mode(struct qm1d1c0042_state *state, bool fast)
+{
+ if (fast)
+ state->regs[0x03] |= 0x01; /* set fast search mode */
+ else
+ state->regs[0x03] &= ~0x01 & 0xff;
+
+ return reg_write(state, 0x03, state->regs[0x03]);
+}
+
+static int qm1d1c0042_wakeup(struct qm1d1c0042_state *state)
+{
+ int ret;
+
+ state->regs[0x01] |= 1 << 3; /* BB_Reg_enable */
+ state->regs[0x01] &= (~(1 << 0)) & 0xff; /* NORMAL (wake-up) */
+ state->regs[0x05] &= (~(1 << 3)) & 0xff; /* pfd_rst NORMAL */
+ ret = reg_write(state, 0x01, state->regs[0x01]);
+ if (ret == 0)
+ ret = reg_write(state, 0x05, state->regs[0x05]);
+
+ if (ret < 0)
+ dev_warn(&state->i2c->dev, "(%s) failed. [adap%d-fe%d]\n",
+ __func__, state->cfg.fe->dvb->num, state->cfg.fe->id);
+ return ret;
+}
+
+/* tuner_ops */
+
+static int qm1d1c0042_set_config(struct dvb_frontend *fe, void *priv_cfg)
+{
+ struct qm1d1c0042_state *state;
+ struct qm1d1c0042_config *cfg;
+
+ state = fe->tuner_priv;
+ cfg = priv_cfg;
+
+ if (cfg->fe)
+ state->cfg.fe = cfg->fe;
+
+ if (cfg->xtal_freq != QM1D1C0042_CFG_XTAL_DFLT)
+ dev_warn(&state->i2c->dev,
+ "(%s) changing xtal_freq not supported. ", __func__);
+ state->cfg.xtal_freq = default_cfg.xtal_freq;
+
+ state->cfg.lpf = cfg->lpf;
+ state->cfg.fast_srch = cfg->fast_srch;
+
+ if (cfg->lpf_wait != QM1D1C0042_CFG_WAIT_DFLT)
+ state->cfg.lpf_wait = cfg->lpf_wait;
+ else
+ state->cfg.lpf_wait = default_cfg.lpf_wait;
+
+ if (cfg->fast_srch_wait != QM1D1C0042_CFG_WAIT_DFLT)
+ state->cfg.fast_srch_wait = cfg->fast_srch_wait;
+ else
+ state->cfg.fast_srch_wait = default_cfg.fast_srch_wait;
+
+ if (cfg->normal_srch_wait != QM1D1C0042_CFG_WAIT_DFLT)
+ state->cfg.normal_srch_wait = cfg->normal_srch_wait;
+ else
+ state->cfg.normal_srch_wait = default_cfg.normal_srch_wait;
+ return 0;
+}
+
+/* divisor, vco_band parameters */
+/* {maxfreq, param1(band?), param2(div?) */
+static const u32 conv_table[9][3] = {
+ { 2151000, 1, 7 },
+ { 1950000, 1, 6 },
+ { 1800000, 1, 5 },
+ { 1600000, 1, 4 },
+ { 1450000, 1, 3 },
+ { 1250000, 1, 2 },
+ { 1200000, 0, 7 },
+ { 975000, 0, 6 },
+ { 950000, 0, 0 }
+};
+
+static int qm1d1c0042_set_params(struct dvb_frontend *fe)
+{
+ struct qm1d1c0042_state *state;
+ u32 freq;
+ int i, ret;
+ u8 val, mask;
+ u32 a, sd;
+ s32 b;
+
+ state = fe->tuner_priv;
+ freq = fe->dtv_property_cache.frequency;
+
+ state->regs[0x08] &= 0xf0;
+ state->regs[0x08] |= 0x09;
+
+ state->regs[0x13] &= 0x9f;
+ state->regs[0x13] |= 0x20;
+
+ /* div2/vco_band */
+ val = state->regs[0x02] & 0x0f;
+ for (i = 0; i < 8; i++)
+ if (freq < conv_table[i][0] && freq >= conv_table[i + 1][0]) {
+ val |= conv_table[i][1] << 7;
+ val |= conv_table[i][2] << 4;
+ break;
+ }
+ ret = reg_write(state, 0x02, val);
+ if (ret < 0)
+ return ret;
+
+ a = (freq + state->cfg.xtal_freq / 2) / state->cfg.xtal_freq;
+
+ state->regs[0x06] &= 0x40;
+ state->regs[0x06] |= (a - 12) / 4;
+ ret = reg_write(state, 0x06, state->regs[0x06]);
+ if (ret < 0)
+ return ret;
+
+ state->regs[0x07] &= 0xf0;
+ state->regs[0x07] |= (a - 4 * ((a - 12) / 4 + 1) - 5) & 0x0f;
+ ret = reg_write(state, 0x07, state->regs[0x07]);
+ if (ret < 0)
+ return ret;
+
+ /* LPF */
+ val = state->regs[0x08];
+ if (state->cfg.lpf) {
+ /* LPF_CLK, LPF_FC */
+ val &= 0xf0;
+ val |= 0x02;
+ }
+ ret = reg_write(state, 0x08, val);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * b = (freq / state->cfg.xtal_freq - a) << 20;
+ * sd = b (b >= 0)
+ * 1<<22 + b (b < 0)
+ */
+ b = (((s64) freq) << 20) / state->cfg.xtal_freq - (((s64) a) << 20);
+ if (b >= 0)
+ sd = b;
+ else
+ sd = (1 << 22) + b;
+
+ state->regs[0x09] &= 0xc0;
+ state->regs[0x09] |= (sd >> 16) & 0x3f;
+ state->regs[0x0a] = (sd >> 8) & 0xff;
+ state->regs[0x0b] = sd & 0xff;
+ ret = reg_write(state, 0x09, state->regs[0x09]);
+ if (ret == 0)
+ ret = reg_write(state, 0x0a, state->regs[0x0a]);
+ if (ret == 0)
+ ret = reg_write(state, 0x0b, state->regs[0x0b]);
+ if (ret != 0)
+ return ret;
+
+ if (!state->cfg.lpf) {
+ /* CSEL_Offset */
+ ret = reg_write(state, 0x13, state->regs[0x13]);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* VCO_TM, LPF_TM */
+ mask = state->cfg.lpf ? 0x3f : 0x7f;
+ val = state->regs[0x0c] & mask;
+ ret = reg_write(state, 0x0c, val);
+ if (ret < 0)
+ return ret;
+ usleep_range(2000, 3000);
+ val = state->regs[0x0c] | ~mask;
+ ret = reg_write(state, 0x0c, val);
+ if (ret < 0)
+ return ret;
+
+ if (state->cfg.lpf)
+ msleep(state->cfg.lpf_wait);
+ else if (state->regs[0x03] & 0x01)
+ msleep(state->cfg.fast_srch_wait);
+ else
+ msleep(state->cfg.normal_srch_wait);
+
+ if (state->cfg.lpf) {
+ /* LPF_FC */
+ ret = reg_write(state, 0x08, 0x09);
+ if (ret < 0)
+ return ret;
+
+ /* CSEL_Offset */
+ ret = reg_write(state, 0x13, state->regs[0x13]);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int qm1d1c0042_sleep(struct dvb_frontend *fe)
+{
+ struct qm1d1c0042_state *state;
+ int ret;
+
+ state = fe->tuner_priv;
+ state->regs[0x01] &= (~(1 << 3)) & 0xff; /* BB_Reg_disable */
+ state->regs[0x01] |= 1 << 0; /* STDBY */
+ state->regs[0x05] |= 1 << 3; /* pfd_rst STANDBY */
+ ret = reg_write(state, 0x05, state->regs[0x05]);
+ if (ret == 0)
+ ret = reg_write(state, 0x01, state->regs[0x01]);
+ if (ret < 0)
+ dev_warn(&state->i2c->dev, "(%s) failed. [adap%d-fe%d]\n",
+ __func__, fe->dvb->num, fe->id);
+ return ret;
+}
+
+static int qm1d1c0042_init(struct dvb_frontend *fe)
+{
+ struct qm1d1c0042_state *state;
+ u8 val;
+ int i, ret;
+
+ state = fe->tuner_priv;
+ memcpy(state->regs, reg_initval, sizeof(reg_initval));
+
+ reg_write(state, 0x01, 0x0c);
+ reg_write(state, 0x01, 0x0c);
+
+ ret = reg_write(state, 0x01, 0x0c); /* soft reset on */
+ if (ret < 0)
+ goto failed;
+ usleep_range(2000, 3000);
+
+ val = state->regs[0x01] | 0x10;
+ ret = reg_write(state, 0x01, val); /* soft reset off */
+ if (ret < 0)
+ goto failed;
+
+ /* check ID */
+ ret = reg_read(state, 0x00, &val);
+ if (ret < 0 || val != 0x48)
+ goto failed;
+ usleep_range(2000, 3000);
+
+ state->regs[0x0c] |= 0x40;
+ ret = reg_write(state, 0x0c, state->regs[0x0c]);
+ if (ret < 0)
+ goto failed;
+ msleep(state->cfg.lpf_wait);
+
+ /* set all writable registers */
+ for (i = 1; i <= 0x0c ; i++) {
+ ret = reg_write(state, i, state->regs[i]);
+ if (ret < 0)
+ goto failed;
+ }
+ for (i = 0x11; i < QM1D1C0042_NUM_REGS; i++) {
+ ret = reg_write(state, i, state->regs[i]);
+ if (ret < 0)
+ goto failed;
+ }
+
+ ret = qm1d1c0042_wakeup(state);
+ if (ret < 0)
+ goto failed;
+
+ ret = qm1d1c0042_set_srch_mode(state, state->cfg.fast_srch);
+ if (ret < 0)
+ goto failed;
+
+ return ret;
+
+failed:
+ dev_warn(&state->i2c->dev, "(%s) failed. [adap%d-fe%d]\n",
+ __func__, fe->dvb->num, fe->id);
+ return ret;
+}
+
+/* I2C driver functions */
+
+static const struct dvb_tuner_ops qm1d1c0042_ops = {
+ .info = {
+ .name = "Sharp QM1D1C0042",
+
+ .frequency_min = 950000,
+ .frequency_max = 2150000,
+ },
+
+ .init = qm1d1c0042_init,
+ .sleep = qm1d1c0042_sleep,
+ .set_config = qm1d1c0042_set_config,
+ .set_params = qm1d1c0042_set_params,
+};
+
+
+static int qm1d1c0042_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct qm1d1c0042_state *state;
+ struct qm1d1c0042_config *cfg;
+ struct dvb_frontend *fe;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+ state->i2c = client;
+
+ cfg = client->dev.platform_data;
+ fe = cfg->fe;
+ fe->tuner_priv = state;
+ qm1d1c0042_set_config(fe, cfg);
+ memcpy(&fe->ops.tuner_ops, &qm1d1c0042_ops, sizeof(qm1d1c0042_ops));
+
+ i2c_set_clientdata(client, &state->cfg);
+ dev_info(&client->dev, "Sharp QM1D1C0042 attached.\n");
+ return 0;
+}
+
+static int qm1d1c0042_remove(struct i2c_client *client)
+{
+ struct qm1d1c0042_state *state;
+
+ state = cfg_to_state(i2c_get_clientdata(client));
+ state->cfg.fe->tuner_priv = NULL;
+ kfree(state);
+ return 0;
+}
+
+
+static const struct i2c_device_id qm1d1c0042_id[] = {
+ {"qm1d1c0042", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, qm1d1c0042_id);
+
+static struct i2c_driver qm1d1c0042_driver = {
+ .driver = {
+ .name = "qm1d1c0042",
+ },
+ .probe = qm1d1c0042_probe,
+ .remove = qm1d1c0042_remove,
+ .id_table = qm1d1c0042_id,
+};
+
+module_i2c_driver(qm1d1c0042_driver);
+
+MODULE_DESCRIPTION("Sharp QM1D1C0042 tuner");
+MODULE_AUTHOR("Akihiro TSUKADA");
+MODULE_LICENSE("GPL");
projects / linux-beck.git / commitdiff