--- /dev/null
+/*
+ * Panasonic MN88472 DVB-T/T2/C demodulator driver
+ *
+ * Copyright (C) 2013 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 "mn88472_priv.h"
+
+static struct dvb_frontend_ops mn88472_ops_c;
+
+/* write multiple registers */
+static int mn88472_wregs(struct mn88472_state *s, 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(s->i2c, msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ dev_warn(&s->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 mn88472_rregs(struct mn88472_state *s, 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(s->i2c, msg, 2);
+ if (ret == 2) {
+ memcpy(val, buf, len);
+ ret = 0;
+ } else {
+ dev_warn(&s->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 mn88472_wreg(struct mn88472_state *s, u16 reg, u8 val)
+{
+ return mn88472_wregs(s, reg, &val, 1);
+}
+
+/* read single register */
+static int mn88472_rreg(struct mn88472_state *s, u16 reg, u8 *val)
+{
+ return mn88472_rregs(s, reg, val, 1);
+}
+
+static int mn88472_set_frontend_c(struct dvb_frontend *fe)
+{
+ struct mn88472_state *s = fe->demodulator_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret;
+ u32 if_frequency = 0;
+ dev_dbg(&s->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 (!s->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(&s->i2c->dev, "%s: get_if_frequency=%d\n",
+ __func__, if_frequency);
+ }
+
+ if (if_frequency != 5070000) {
+ dev_err(&s->i2c->dev, "%s: IF frequency %d not supported\n",
+ KBUILD_MODNAME, if_frequency);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = mn88472_wregs(s, 0x1c08, "\x1d", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18d9, "\xe3", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1c83, "\x01", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1c00, "\x66\x00\x01\x04\x00", 5);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1c10,
+ "\x3f\x50\x2c\x8f\x80\x00\x08\xee\x08\xee", 10);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1846, "\x00", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18ae, "\x00", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18b0, "\x0b", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18b4, "\x00", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18cd, "\x17", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18d4, "\x09", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x18d6, "\x48", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1a00, "\xb0", 1);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1cf8, "\x9f", 1);
+ if (ret)
+ goto err;
+
+ s->delivery_system = c->delivery_system;
+
+ return 0;
+err:
+ dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static int mn88472_read_status_c(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct mn88472_state *s = fe->demodulator_priv;
+ int ret;
+ u8 u8tmp;
+
+ *status = 0;
+
+ if (!s->warm) {
+ ret = -EAGAIN;
+ goto err;
+ }
+
+ ret = mn88472_rreg(s, 0x1a84, &u8tmp);
+ if (ret)
+ goto err;
+
+ if (u8tmp == 0x08)
+ *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
+ FE_HAS_SYNC | FE_HAS_LOCK;
+
+ return 0;
+err:
+ dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static int mn88472_init_c(struct dvb_frontend *fe)
+{
+ struct mn88472_state *s = fe->demodulator_priv;
+ int ret, len, remaining;
+ const struct firmware *fw = NULL;
+ u8 *fw_file = MN88472_FIRMWARE;
+ dev_dbg(&s->i2c->dev, "%s:\n", __func__);
+
+ /* set cold state by default */
+ s->warm = false;
+
+ /* power on */
+ ret = mn88472_wreg(s, 0x1c05, 0x00);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wregs(s, 0x1c0b, "\x00\x00", 2);
+ if (ret)
+ goto err;
+
+ /* request the firmware, this will block and timeout */
+ ret = request_firmware(&fw, fw_file, s->i2c->dev.parent);
+ if (ret) {
+ dev_err(&s->i2c->dev, "%s: firmare file '%s' not found\n",
+ KBUILD_MODNAME, fw_file);
+ goto err;
+ }
+
+ dev_info(&s->i2c->dev, "%s: downloading firmware from file '%s'\n",
+ KBUILD_MODNAME, fw_file);
+
+ ret = mn88472_wreg(s, 0x18f5, 0x03);
+ if (ret)
+ goto err;
+
+ for (remaining = fw->size; remaining > 0;
+ remaining -= (s->cfg->i2c_wr_max - 1)) {
+ len = remaining;
+ if (len > (s->cfg->i2c_wr_max - 1))
+ len = (s->cfg->i2c_wr_max - 1);
+
+ ret = mn88472_wregs(s, 0x18f6,
+ &fw->data[fw->size - remaining], len);
+ if (ret) {
+ dev_err(&s->i2c->dev,
+ "%s: firmware download failed=%d\n",
+ KBUILD_MODNAME, ret);
+ goto err;
+ }
+ }
+
+ ret = mn88472_wreg(s, 0x18f5, 0x00);
+ if (ret)
+ goto err;
+
+ release_firmware(fw);
+ fw = NULL;
+
+ /* warm state */
+ s->warm = true;
+
+ return 0;
+err:
+ if (fw)
+ release_firmware(fw);
+
+ dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static int mn88472_sleep_c(struct dvb_frontend *fe)
+{
+ struct mn88472_state *s = fe->demodulator_priv;
+ int ret;
+ dev_dbg(&s->i2c->dev, "%s:\n", __func__);
+
+ /* power off */
+ ret = mn88472_wreg(s, 0x1c0b, 0x30);
+ if (ret)
+ goto err;
+
+ ret = mn88472_wreg(s, 0x1c05, 0x3e);
+ if (ret)
+ goto err;
+
+ s->delivery_system = SYS_UNDEFINED;
+
+ return 0;
+err:
+ dev_dbg(&s->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
+static void mn88472_release_c(struct dvb_frontend *fe)
+{
+ struct mn88472_state *s = fe->demodulator_priv;
+ kfree(s);
+}
+
+struct dvb_frontend *mn88472_attach_c(const struct mn88472_c_config *cfg,
+ struct i2c_adapter *i2c)
+{
+ int ret;
+ struct mn88472_state *s;
+ u8 u8tmp;
+ dev_dbg(&i2c->dev, "%s:\n", __func__);
+
+ /* allocate memory for the internal state */
+ s = kzalloc(sizeof(struct mn88472_state), GFP_KERNEL);
+ if (!s) {
+ ret = -ENOMEM;
+ dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
+ goto err;
+ }
+
+ s->cfg = cfg;
+ s->i2c = i2c;
+
+ /* check demod responds to I2C */
+ ret = mn88472_rreg(s, 0x1c00, &u8tmp);
+ if (ret)
+ goto err;
+
+ /* create dvb_frontend */
+ memcpy(&s->fe.ops, &mn88472_ops_c, sizeof(struct dvb_frontend_ops));
+ s->fe.demodulator_priv = s;
+
+ return &s->fe;
+err:
+ dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
+ kfree(s);
+ return NULL;
+}
+EXPORT_SYMBOL(mn88472_attach_c);
+
+static struct dvb_frontend_ops mn88472_ops_c = {
+ .delsys = {SYS_DVBC_ANNEX_A},
+ .info = {
+ .name = "Panasonic MN88472",
+ .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 = mn88472_release_c,
+
+ .init = mn88472_init_c,
+ .sleep = mn88472_sleep_c,
+
+ .set_frontend = mn88472_set_frontend_c,
+/* .get_frontend = mn88472_get_frontend_c, */
+
+ .read_status = mn88472_read_status_c,
+/* .read_snr = mn88472_read_snr_c, */
+};
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(MN88472_FIRMWARE);
projects / linux-beck.git / commitdiff