--- /dev/null
+/*
+ * 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);
projects / platform / kernel / linux-rpi.git / commitdiff