From dadb5bb473189ca7e80bf2190b44cf276ea42af2 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Tue, 30 Sep 2014 01:01:47 -0300 Subject: [PATCH] [media] mn88473: Panasonic MN88473 DVB-T/T2/C demod driver Only DVB-C is implemented. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/Kconfig | 7 + drivers/media/dvb-frontends/Makefile | 1 + drivers/media/dvb-frontends/mn88473.c | 393 +++++++++++++++++++++++++++++ drivers/media/dvb-frontends/mn88473.h | 46 ++++ drivers/media/dvb-frontends/mn88473_priv.h | 34 +++ 5 files changed, 481 insertions(+) create mode 100644 drivers/media/dvb-frontends/mn88473.c create mode 100644 drivers/media/dvb-frontends/mn88473.h create mode 100644 drivers/media/dvb-frontends/mn88473_priv.h diff --git a/drivers/media/dvb-frontends/Kconfig b/drivers/media/dvb-frontends/Kconfig index 6c75418..2720b8f 100644 --- a/drivers/media/dvb-frontends/Kconfig +++ b/drivers/media/dvb-frontends/Kconfig @@ -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 diff --git a/drivers/media/dvb-frontends/Makefile b/drivers/media/dvb-frontends/Makefile index ba59df6..8be6eb0 100644 --- a/drivers/media/dvb-frontends/Makefile +++ b/drivers/media/dvb-frontends/Makefile @@ -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 index 0000000..afe59f3 --- /dev/null +++ b/drivers/media/dvb-frontends/mn88473.c @@ -0,0 +1,393 @@ +/* + * Panasonic MN88473 DVB-T/T2/C demodulator driver + * + * Copyright (C) 2014 Antti Palosaari + * + * 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 "); +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 index 0000000..13b51b6 --- /dev/null +++ b/drivers/media/dvb-frontends/mn88473.h @@ -0,0 +1,46 @@ +/* + * Panasonic MN88473 DVB-T/T2/C demodulator driver + * + * Copyright (C) 2014 Antti Palosaari + * + * 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 + +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 index 0000000..c40b3a5 --- /dev/null +++ b/drivers/media/dvb-frontends/mn88473_priv.h @@ -0,0 +1,34 @@ +/* + * Panasonic MN88473 DVB-T/T2/C demodulator driver + * + * Copyright (C) 2014 Antti Palosaari + * + * 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 + +#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 -- 2.7.4