From: Akihiro Tsukada <tskd08@xxxxxxxxx>
This patch adds driver for qm1d1c0042 tuner chips.
It is used as an ISDB-S tuner in earthsoft pt3 cards.
Signed-off-by: Akihiro Tsukada <tskd08@xxxxxxxxx>
---
Changes in v2:
- moved a static const table out of function scope
- removed an unused config parameter
- improvement in _init() to support suspend/resume
drivers/media/tuners/Kconfig | 7 +
drivers/media/tuners/Makefile | 1 +
drivers/media/tuners/qm1d1c0042.c | 422 ++++++++++++++++++++++++++++++++++++++
drivers/media/tuners/qm1d1c0042.h | 50 +++++
4 files changed, 480 insertions(+)
diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig
index cd3f8ee..8125d1d 100644
--- a/drivers/media/tuners/Kconfig
+++ b/drivers/media/tuners/Kconfig
@@ -264,4 +264,11 @@ config MEDIA_TUNER_MXL301RF
default m if !MEDIA_SUBDRV_AUTOSELECT
help
MaxLinear MxL301RF OFDM tuner driver.
+
+config MEDIA_TUNER_QM1D1C0042
+ tristate "Sharp QM1D1C0042 tuner"
+ depends on MEDIA_SUPPORT && I2C
+ default m if !MEDIA_SUBDRV_AUTOSELECT
+ help
+ Sharp QM1D1C0042 trellis coded 8PSK tuner driver.
endmenu
diff --git a/drivers/media/tuners/Makefile b/drivers/media/tuners/Makefile
index 6d5bf48..04d5efc 100644
--- a/drivers/media/tuners/Makefile
+++ b/drivers/media/tuners/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_MEDIA_TUNER_FC0013) += fc0013.o
obj-$(CONFIG_MEDIA_TUNER_IT913X) += tuner_it913x.o
obj-$(CONFIG_MEDIA_TUNER_R820T) += r820t.o
obj-$(CONFIG_MEDIA_TUNER_MXL301RF) += mxl301rf.o
+obj-$(CONFIG_MEDIA_TUNER_QM1D1C0042) += qm1d1c0042.o
ccflags-y += -I$(srctree)/drivers/media/dvb-core
ccflags-y += -I$(srctree)/drivers/media/dvb-frontends
diff --git a/drivers/media/tuners/qm1d1c0042.c b/drivers/media/tuners/qm1d1c0042.c
new file mode 100644
index 0000000..ea6c245
--- /dev/null
+++ b/drivers/media/tuners/qm1d1c0042.c
@@ -0,0 +1,422 @@
+/*
+ * Sharp QM1D1C0042 8PSK tuner driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@xxxxxxxxx>
+ *
+ * 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.
+ */
+
+#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 = {
+ .init_freq = 0,
+ .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_adapter *i2c;
+ struct dvb_frontend *fe;
+ u8 regs[QM1D1C0042_NUM_REGS];
+};
+
+static int reg_write(struct qm1d1c0042_state *state, u8 reg, u8 val)
+{
+ u8 wbuf[2] = { reg, val };
+ struct i2c_msg msg = {
+ .addr = state->cfg.addr,
+ .flags = 0,
+ .buf = wbuf,
+ .len = 2,
+ };
+ return i2c_transfer(state->i2c, &msg, 1);
+}
+
+
+static int reg_read(struct qm1d1c0042_state *state, u8 reg, u8 *val)
+{
+ struct i2c_msg msgs[2] = {
+ {
+ .addr = state->cfg.addr,
+ .flags = 0,
+ .buf = ®,
+ .len = 1,
+ },
+ {
+ .addr = state->cfg.addr,
+ .flags = I2C_M_RD,
+ .buf = val,
+ .len = 1,
+ },
+ };
+
+ return i2c_transfer(state->i2c, msgs, ARRAY_SIZE(msgs));
+}
+
+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->fe->dvb->num, state->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;
+
+ state->cfg.init_freq = cfg->init_freq;
+ if (cfg->xtal_freq != QM1D1C0042_CFG_XTAL_DFLT)
+ dev_warn(&state->i2c->dev,
+ "(%s) changing xtal_freq not supported. "
+ "[adap%d-fe%d]\n", __func__, fe->dvb->num, fe->id);
+ 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]);
+ ret |= reg_write(state, 0x0a, state->regs[0x0a]);
+ 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_get_status(struct dvb_frontend *fe, u32 *status)
+{
+ struct qm1d1c0042_state *state;
+ int ret;
+
+ *status = 0;
+ state = fe->tuner_priv;
+ ret = reg_read(state, 0x0d, &state->regs[0x0d]);
+ if (ret == 0 && state->regs[0x0d] & 0x40)
+ *status = TUNER_STATUS_LOCKED;
+ return ret;
+}
+
+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;
+ u8 i;
+ int 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;
+
+ if (state->cfg.init_freq > 0) {
+ u32 f = fe->dtv_property_cache.frequency;
+
+ fe->dtv_property_cache.frequency = state->cfg.init_freq;
+ ret = qm1d1c0042_set_params(fe);
+ fe->dtv_property_cache.frequency = f;
+ }
+ return ret;
+
+failed:
+ dev_warn(&state->i2c->dev, "(%s) failed. [adap%d-fe%d]\n",
+ __func__, fe->dvb->num, fe->id);
+ return ret;
+}
+
+static int qm1d1c0042_release(struct dvb_frontend *fe)
+{
+ struct qm1d1c0042_state *state;
+
+ state = fe->tuner_priv;
+ kfree(state);
+ fe->tuner_priv = NULL;
+ return 0;
+}
+
+/* exported functions */
+
+static const struct dvb_tuner_ops qm1d1c0042_ops = {
+ .info = {
+ .name = "Sharp QM1D1C0042",
+
+ .frequency_min = 950000,
+ .frequency_max = 2150000,
+ },
+
+ .release = qm1d1c0042_release,
+ .init = qm1d1c0042_init,
+ .sleep = qm1d1c0042_sleep,
+ .set_config = qm1d1c0042_set_config,
+ .set_params = qm1d1c0042_set_params,
+ .get_status = qm1d1c0042_get_status,
+};
+
+
+struct dvb_frontend *qm1d1c0042_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c,
+ const struct qm1d1c0042_config *cfg)
+{
+ struct qm1d1c0042_state *state;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ state->fe = fe;
+ state->i2c = i2c;
+ memcpy(&state->cfg, &default_cfg, sizeof(default_cfg));
+ state->cfg.addr = cfg->addr;
+
+ memcpy(&fe->ops.tuner_ops, &qm1d1c0042_ops, sizeof(qm1d1c0042_ops));
+ fe->tuner_priv = state;
+ fe->ops.tuner_ops.set_config(fe, (void *)cfg);
+ dev_info(&i2c->dev, "Sharp QM1D1C0042 attached.\n");
+ return fe;
+}
+EXPORT_SYMBOL(qm1d1c0042_attach);
+
+MODULE_DESCRIPTION("Sharp QM1D1C0042 tuner");
+MODULE_AUTHOR("Akihiro TSUKADA");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/tuners/qm1d1c0042.h b/drivers/media/tuners/qm1d1c0042.h
new file mode 100644
index 0000000..5b76da8
--- /dev/null
+++ b/drivers/media/tuners/qm1d1c0042.h
@@ -0,0 +1,50 @@
+/*
+ * Sharp QM1D1C0042 8PSK tuner driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@xxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef QM1D1C0042_H
+#define QM1D1C0042_H
+
+#include <linux/kconfig.h>
+#include "dvb_frontend.h"
+
+
+struct qm1d1c0042_config {
+ u8 addr;
+ u32 init_freq; /* initial frequency to be tuned. [kHz] */
+ u32 xtal_freq; /* [kHz] */ /* currently ignored */
+ bool lpf; /* enable LPF */
+ bool fast_srch; /* enable fast search mode, no LPF */
+ u32 lpf_wait; /* wait in tuning with LPF enabled. [ms] */
+ u32 fast_srch_wait; /* with fast-search mode, no LPF. [ms] */
+ u32 normal_srch_wait; /* with no LPF/fast-search mode. [ms] */
+};
+/* special values indicating to use the default in qm1d1c0042_config */
+#define QM1D1C0042_CFG_XTAL_DFLT 0
+#define QM1D1C0042_CFG_WAIT_DFLT 0
+
+#if IS_ENABLED(CONFIG_MEDIA_TUNER_QM1D1C0042)
+extern struct dvb_frontend *qm1d1c0042_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct qm1d1c0042_config *cfg);
+#else
+static inline struct dvb_frontend *qm1d1c0042_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct qm1d1c0042_config *cfg)
+{
+ printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+ return NULL;
+}
+#endif
+
+#endif /* QM1D1C0042_H */
--
2.1.0
--
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