[media] mn88473: Panasonic MN88473 DVB-T/T2/C demod driver
authorAntti Palosaari <crope@iki.fi>
Tue, 30 Sep 2014 04:01:47 +0000 (01:01 -0300)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Fri, 14 Nov 2014 19:23:35 +0000 (17:23 -0200)
Only DVB-C is implemented.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/dvb-frontends/Kconfig
drivers/media/dvb-frontends/Makefile
drivers/media/dvb-frontends/mn88473.c [new file with mode: 0644]
drivers/media/dvb-frontends/mn88473.h [new file with mode: 0644]
drivers/media/dvb-frontends/mn88473_priv.h [new file with mode: 0644]

index 6c75418222e221dd3cc775379a6eb1527148ab2c..2720b8f4491b4d221b3190e6f730d89db8f87515 100644 (file)
@@ -471,6 +471,13 @@ config DVB_SI2168
        help
          Say Y when you want to support this frontend.
 
+config DVB_MN88473
+       tristate "Panasonic MN88473"
+       depends on DVB_CORE && I2C
+       default m if !MEDIA_SUBDRV_AUTOSELECT
+       help
+         Say Y when you want to support this frontend.
+
 config DVB_AS102_FE
        tristate
        depends on DVB_CORE
index ba59df63d05082062ca03bb2f4ca6ffe2418e7b0..8be6eb0d440d7dbff8476fc1b8407c6e02e5c9fc 100644 (file)
@@ -113,6 +113,7 @@ obj-$(CONFIG_DVB_RTL2830) += rtl2830.o
 obj-$(CONFIG_DVB_RTL2832) += rtl2832.o
 obj-$(CONFIG_DVB_RTL2832_SDR) += rtl2832_sdr.o
 obj-$(CONFIG_DVB_M88RS2000) += m88rs2000.o
+obj-$(CONFIG_DVB_MN88473) += mn88473.o
 obj-$(CONFIG_DVB_AF9033) += af9033.o
 obj-$(CONFIG_DVB_AS102_FE) += as102_fe.o
 obj-$(CONFIG_DVB_TC90522) += tc90522.o
diff --git a/drivers/media/dvb-frontends/mn88473.c b/drivers/media/dvb-frontends/mn88473.c
new file mode 100644 (file)
index 0000000..afe59f3
--- /dev/null
@@ -0,0 +1,393 @@
+/*
+ * Panasonic MN88473 DVB-T/T2/C demodulator driver
+ *
+ * Copyright (C) 2014 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.
+ */
+
+#include "mn88473_priv.h"
+
+static struct dvb_frontend_ops mn88473_ops;
+
+/* write multiple registers */
+static int mn88473_wregs(struct mn88473_dev *dev, u16 reg, const u8 *val, int len)
+{
+#define MAX_WR_LEN 21
+#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
+       int ret;
+       u8 buf[MAX_WR_XFER_LEN];
+       struct i2c_msg msg[1] = {
+               {
+                       .addr = (reg >> 8) & 0xff,
+                       .flags = 0,
+                       .len = 1 + len,
+                       .buf = buf,
+               }
+       };
+
+       if (WARN_ON(len > MAX_WR_LEN))
+               return -EINVAL;
+
+       buf[0] = (reg >> 0) & 0xff;
+       memcpy(&buf[1], val, len);
+
+       ret = i2c_transfer(dev->i2c, msg, 1);
+       if (ret == 1) {
+               ret = 0;
+       } else {
+               dev_warn(&dev->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 mn88473_rregs(struct mn88473_dev *dev, u16 reg, u8 *val, int len)
+{
+#define MAX_RD_LEN 2
+#define MAX_RD_XFER_LEN (MAX_RD_LEN)
+       int ret;
+       u8 buf[MAX_RD_XFER_LEN];
+       struct i2c_msg msg[2] = {
+               {
+                       .addr = (reg >> 8) & 0xff,
+                       .flags = 0,
+                       .len = 1,
+                       .buf = buf,
+               }, {
+                       .addr = (reg >> 8) & 0xff,
+                       .flags = I2C_M_RD,
+                       .len = len,
+                       .buf = buf,
+               }
+       };
+
+       if (WARN_ON(len > MAX_RD_LEN))
+               return -EINVAL;
+
+       buf[0] = (reg >> 0) & 0xff;
+
+       ret = i2c_transfer(dev->i2c, msg, 2);
+       if (ret == 2) {
+               memcpy(val, buf, len);
+               ret = 0;
+       } else {
+               dev_warn(&dev->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 mn88473_wreg(struct mn88473_dev *dev, u16 reg, u8 val)
+{
+       return mn88473_wregs(dev, reg, &val, 1);
+}
+
+/* read single register */
+static int mn88473_rreg(struct mn88473_dev *dev, u16 reg, u8 *val)
+{
+       return mn88473_rregs(dev, reg, val, 1);
+}
+
+static int mn88473_get_tune_settings(struct dvb_frontend *fe,
+       struct dvb_frontend_tune_settings *s)
+{
+       s->min_delay_ms = 1000;
+       return 0;
+}
+
+static int mn88473_set_frontend(struct dvb_frontend *fe)
+{
+       struct mn88473_dev *dev = fe->demodulator_priv;
+       struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+       int ret;
+       u32 if_frequency = 0;
+
+       dev_dbg(&dev->i2c->dev,
+                       "%s: delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n",
+                       __func__, c->delivery_system, c->modulation,
+                       c->frequency, c->symbol_rate, c->inversion);
+
+       if (!dev->warm) {
+               ret = -EAGAIN;
+               goto err;
+       }
+
+       /* program tuner */
+       if (fe->ops.tuner_ops.set_params) {
+               ret = fe->ops.tuner_ops.set_params(fe);
+               if (ret)
+                       goto err;
+       }
+
+       if (fe->ops.tuner_ops.get_if_frequency) {
+               ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
+               if (ret)
+                       goto err;
+
+               dev_dbg(&dev->i2c->dev, "%s: get_if_frequency=%d\n",
+                               __func__, if_frequency);
+       }
+
+       if (if_frequency != 5070000) {
+               dev_err(&dev->i2c->dev, "%s: IF frequency %d not supported\n",
+                               KBUILD_MODNAME, if_frequency);
+               ret = -EINVAL;
+               goto err;
+       }
+
+       ret = mn88473_wregs(dev, 0x1c05, "\x00", 1);
+       ret = mn88473_wregs(dev, 0x1cfb, "\x13", 1);
+       ret = mn88473_wregs(dev, 0x1cef, "\x13", 1);
+       ret = mn88473_wregs(dev, 0x1cf9, "\x13", 1);
+       ret = mn88473_wregs(dev, 0x1c00, "\x18", 1);
+       ret = mn88473_wregs(dev, 0x1c01, "\x01", 1);
+       ret = mn88473_wregs(dev, 0x1c02, "\x21", 1);
+       ret = mn88473_wregs(dev, 0x1c03, "\x04", 1);
+       ret = mn88473_wregs(dev, 0x1c0b, "\x00", 1);
+       ret = mn88473_wregs(dev, 0x1c10, "\x33\xea\xb3\xaf\x00\x00\x11\xec\x11\xec", 10);
+       ret = mn88473_wregs(dev, 0x1c2d, "\x3b", 1);
+       ret = mn88473_wregs(dev, 0x1c2e, "\x00", 1);
+       ret = mn88473_wregs(dev, 0x1c56, "\x0d", 1);
+       ret = mn88473_wregs(dev, 0x1802, "\x13", 1);
+       ret = mn88473_wregs(dev, 0x1803, "\x80", 1);
+       ret = mn88473_wregs(dev, 0x1804, "\xba", 1);
+       ret = mn88473_wregs(dev, 0x1805, "\x91", 1);
+       ret = mn88473_wregs(dev, 0x1808, "\x28", 1);
+       ret = mn88473_wregs(dev, 0x180a, "\x1a", 1);
+       ret = mn88473_wregs(dev, 0x1813, "\x1f", 1);
+       ret = mn88473_wregs(dev, 0x1819, "\x03", 1);
+       ret = mn88473_wregs(dev, 0x181d, "\xb0", 1);
+       ret = mn88473_wregs(dev, 0x182a, "\x72", 1);
+       ret = mn88473_wregs(dev, 0x182d, "\x00", 1);
+       ret = mn88473_wregs(dev, 0x183c, "\x00", 1);
+       ret = mn88473_wregs(dev, 0x183f, "\xf8", 1);
+       ret = mn88473_wregs(dev, 0x1840, "\xf4", 1);
+       ret = mn88473_wregs(dev, 0x1841, "\x08", 1);
+       ret = mn88473_wregs(dev, 0x18d2, "\x29", 1);
+       ret = mn88473_wregs(dev, 0x18d4, "\x55", 1);
+       ret = mn88473_wregs(dev, 0x1a10, "\x10", 1);
+       ret = mn88473_wregs(dev, 0x1a11, "\xab", 1);
+       ret = mn88473_wregs(dev, 0x1a12, "\x0d", 1);
+       ret = mn88473_wregs(dev, 0x1a13, "\xae", 1);
+       ret = mn88473_wregs(dev, 0x1a14, "\x1d", 1);
+       ret = mn88473_wregs(dev, 0x1a15, "\x9d", 1);
+       ret = mn88473_wregs(dev, 0x1abe, "\x08", 1);
+       ret = mn88473_wregs(dev, 0x1c09, "\x08", 1);
+       ret = mn88473_wregs(dev, 0x1c08, "\x1d", 1);
+       ret = mn88473_wregs(dev, 0x18b2, "\x37", 1);
+       ret = mn88473_wregs(dev, 0x18d7, "\x04", 1);
+       ret = mn88473_wregs(dev, 0x1cf8, "\x9f", 1);
+       if (ret)
+               goto err;
+
+       dev->delivery_system = c->delivery_system;
+
+       return 0;
+err:
+       dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
+       return ret;
+}
+
+static int mn88473_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+       struct mn88473_dev *dev = fe->demodulator_priv;
+       int ret;
+
+       *status = 0;
+
+       if (!dev->warm) {
+               ret = -EAGAIN;
+               goto err;
+       }
+
+       *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
+                       FE_HAS_SYNC | FE_HAS_LOCK;
+
+       return 0;
+err:
+       dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
+       return ret;
+}
+
+static int mn88473_init(struct dvb_frontend *fe)
+{
+       struct mn88473_dev *dev = fe->demodulator_priv;
+       int ret, len, remaining;
+       const struct firmware *fw = NULL;
+       u8 *fw_file = MN88473_FIRMWARE;
+
+       dev_dbg(&dev->i2c->dev, "%s:\n", __func__);
+
+       if (dev->warm)
+               return 0;
+
+       /* request the firmware, this will block and timeout */
+       ret = request_firmware(&fw, fw_file, dev->i2c->dev.parent);
+       if (ret) {
+               dev_err(&dev->i2c->dev, "%s: firmare file '%s' not found\n",
+                               KBUILD_MODNAME, fw_file);
+               goto err;
+       }
+
+       dev_info(&dev->i2c->dev, "%s: downloading firmware from file '%s'\n",
+                       KBUILD_MODNAME, fw_file);
+
+       ret = mn88473_wreg(dev, 0x18f5, 0x03);
+       if (ret)
+               goto err;
+
+       for (remaining = fw->size; remaining > 0;
+                       remaining -= (dev->cfg->i2c_wr_max - 1)) {
+               len = remaining;
+               if (len > (dev->cfg->i2c_wr_max - 1))
+                       len = (dev->cfg->i2c_wr_max - 1);
+
+               ret = mn88473_wregs(dev, 0x18f6,
+                               &fw->data[fw->size - remaining], len);
+               if (ret) {
+                       dev_err(&dev->i2c->dev,
+                                       "%s: firmware download failed=%d\n",
+                                       KBUILD_MODNAME, ret);
+                       goto err;
+               }
+       }
+
+       ret = mn88473_wreg(dev, 0x18f5, 0x00);
+       if (ret)
+               goto err;
+
+       release_firmware(fw);
+       fw = NULL;
+
+       /* warm state */
+       dev->warm = true;
+
+       return 0;
+err:
+       if (fw)
+               release_firmware(fw);
+
+       dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
+       return ret;
+}
+
+static int mn88473_sleep(struct dvb_frontend *fe)
+{
+       struct mn88473_dev *dev = fe->demodulator_priv;
+       int ret;
+
+       dev_dbg(&dev->i2c->dev, "%s:\n", __func__);
+
+       ret = mn88473_wreg(dev, 0x1c05, 0x3e);
+       if (ret)
+               goto err;
+
+       dev->delivery_system = SYS_UNDEFINED;
+
+       return 0;
+err:
+       dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
+       return ret;
+}
+
+static void mn88473_release(struct dvb_frontend *fe)
+{
+       struct mn88473_dev *dev = fe->demodulator_priv;
+       kfree(dev);
+}
+
+struct dvb_frontend *mn88473_attach(const struct mn88473_config *cfg,
+               struct i2c_adapter *i2c)
+{
+       int ret;
+       struct mn88473_dev *dev;
+       u8 u8tmp;
+
+       dev_dbg(&i2c->dev, "%s:\n", __func__);
+
+       /* allocate memory for the internal state */
+       dev = kzalloc(sizeof(struct mn88473_dev), GFP_KERNEL);
+       if (!dev) {
+               ret = -ENOMEM;
+               dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
+               goto err;
+       }
+
+       dev->cfg = cfg;
+       dev->i2c = i2c;
+
+       /* check demod responds to I2C */
+       ret = mn88473_rreg(dev, 0x1c00, &u8tmp);
+       if (ret)
+               goto err;
+
+       /* create dvb_frontend */
+       memcpy(&dev->fe.ops, &mn88473_ops, sizeof(struct dvb_frontend_ops));
+       dev->fe.demodulator_priv = dev;
+
+       return &dev->fe;
+err:
+       dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
+       kfree(dev);
+       return NULL;
+}
+EXPORT_SYMBOL(mn88473_attach);
+
+static struct dvb_frontend_ops mn88473_ops = {
+       .delsys = {SYS_DVBC_ANNEX_AC},
+       .info = {
+               .name = "Panasonic MN88473",
+               .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_32                   |
+                       FE_CAN_QAM_64                   |
+                       FE_CAN_QAM_128                  |
+                       FE_CAN_QAM_256                  |
+                       FE_CAN_QAM_AUTO                 |
+                       FE_CAN_TRANSMISSION_MODE_AUTO   |
+                       FE_CAN_GUARD_INTERVAL_AUTO      |
+                       FE_CAN_HIERARCHY_AUTO           |
+                       FE_CAN_MUTE_TS                  |
+                       FE_CAN_2G_MODULATION            |
+                       FE_CAN_MULTISTREAM
+       },
+
+       .release = mn88473_release,
+
+       .get_tune_settings = mn88473_get_tune_settings,
+
+       .init = mn88473_init,
+       .sleep = mn88473_sleep,
+
+       .set_frontend = mn88473_set_frontend,
+
+       .read_status = mn88473_read_status,
+};
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(MN88473_FIRMWARE);
diff --git a/drivers/media/dvb-frontends/mn88473.h b/drivers/media/dvb-frontends/mn88473.h
new file mode 100644 (file)
index 0000000..13b51b6
--- /dev/null
@@ -0,0 +1,46 @@
+/*
+ * Panasonic MN88473 DVB-T/T2/C demodulator driver
+ *
+ * Copyright (C) 2014 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.
+ */
+
+#ifndef MN88473_H
+#define MN88473_H
+
+#include <linux/dvb/frontend.h>
+
+struct mn88473_config {
+       /*
+        * max bytes I2C client could write
+        * Value must be set.
+        */
+       int i2c_wr_max;
+};
+
+#if IS_ENABLED(CONFIG_DVB_MN88473)
+extern struct dvb_frontend *mn88473_attach(
+       const struct mn88473_config *cfg,
+       struct i2c_adapter *i2c
+);
+#else
+static inline struct dvb_frontend *mn88473_attach(
+       const struct mn88473_config *cfg,
+       struct i2c_adapter *i2c
+)
+{
+       dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
+       return NULL;
+}
+#endif
+
+#endif
diff --git a/drivers/media/dvb-frontends/mn88473_priv.h b/drivers/media/dvb-frontends/mn88473_priv.h
new file mode 100644 (file)
index 0000000..c40b3a5
--- /dev/null
@@ -0,0 +1,34 @@
+/*
+ * Panasonic MN88473 DVB-T/T2/C demodulator driver
+ *
+ * Copyright (C) 2014 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.
+ */
+
+#ifndef MN88473_PRIV_H
+#define MN88473_PRIV_H
+
+#include "dvb_frontend.h"
+#include "mn88473.h"
+#include <linux/firmware.h>
+
+#define MN88473_FIRMWARE "dvb-demod-mn88473-01.fw"
+
+struct mn88473_dev {
+       struct i2c_adapter *i2c;
+       const struct mn88473_config *cfg;
+       struct dvb_frontend fe;
+       fe_delivery_system_t delivery_system;
+       bool warm; /* FW running */
+};
+
+#endif