V4L/DVB (3408): DViCO FusionHDTV DVB-T Hybrid and ZL10353-based FusionHDTV DVB-T Plus support

Add support for the FE6600 tuner used on the DVB-T Hybrid board.
Add support for the Zarlink ZL10353 DVB-T demodulator, which supersedes the
MT352, used on the DViCO FusionHDTV DVB-T Hybrid and later model Plus boards.

Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 311 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c
new file mode 100644
index 00000000000..23846c4452a
--- /dev/null
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -0,0 +1,311 @@
+/*
+ * Driver for Zarlink DVB-T ZL10353 demodulator
+ *
+ * Copyright (C) 2006 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "zl10353_priv.h"
+#include "zl10353.h"
+
+struct zl10353_state {
+	struct i2c_adapter *i2c;
+	struct dvb_frontend frontend;
+	struct dvb_frontend_ops ops;
+
+	struct zl10353_config config;
+};
+
+static int debug_regs = 0;
+
+static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 buf[2] = { reg, val };
+	struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
+			       .buf = buf, .len = 2 };
+	int err = i2c_transfer(state->i2c, &msg, 1);
+	if (err != 1) {
+		printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
+		return err;
+	}
+	return 0;
+}
+
+int zl10353_write(struct dvb_frontend *fe, u8 *ibuf, int ilen)
+{
+	int err, i;
+	for (i = 0; i < ilen - 1; i++)
+		if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
+			return err;
+
+	return 0;
+}
+
+static int zl10353_read_register(struct zl10353_state *state, u8 reg)
+{
+	int ret;
+	u8 b0[1] = { reg };
+	u8 b1[1] = { 0 };
+	struct i2c_msg msg[2] = { { .addr = state->config.demod_address,
+				    .flags = 0,
+				    .buf = b0, .len = 1 },
+				  { .addr = state->config.demod_address,
+				    .flags = I2C_M_RD,
+				    .buf = b1, .len = 1 } };
+
+	ret = i2c_transfer(state->i2c, msg, 2);
+
+	if (ret != 2) {
+		printk("%s: readreg error (reg=%d, ret==%i)\n",
+		       __FUNCTION__, reg, ret);
+		return ret;
+	}
+
+	return b1[0];
+}
+
+void zl10353_dump_regs(struct dvb_frontend *fe)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	char buf[52], buf2[4];
+	int ret;
+	u8 reg;
+
+	/* Dump all registers. */
+	for (reg = 0; ; reg++) {
+		if (reg % 16 == 0) {
+			if (reg)
+				printk(KERN_DEBUG "%s\n", buf);
+			sprintf(buf, "%02x: ", reg);
+		}
+		ret = zl10353_read_register(state, reg);
+		if (ret >= 0)
+			sprintf(buf2, "%02x ", (u8)ret);
+		else
+			strcpy(buf2, "-- ");
+		strcat(buf, buf2);
+		if (reg == 0xff)
+			break;
+	}
+	printk(KERN_DEBUG "%s\n", buf);
+}
+
+static int zl10353_sleep(struct dvb_frontend *fe)
+{
+	static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
+
+	zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
+	return 0;
+}
+
+static int zl10353_set_parameters(struct dvb_frontend *fe,
+				  struct dvb_frontend_parameters *param)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 pllbuf[6] = { 0x67 };
+
+	/* These settings set "auto-everything" and start the FSM. */
+	zl10353_single_write(fe, 0x55, 0x80);
+	udelay(200);
+	zl10353_single_write(fe, 0xEA, 0x01);
+	udelay(200);
+	zl10353_single_write(fe, 0xEA, 0x00);
+
+	zl10353_single_write(fe, 0x56, 0x28);
+	zl10353_single_write(fe, 0x89, 0x20);
+	zl10353_single_write(fe, 0x5E, 0x00);
+	zl10353_single_write(fe, 0x65, 0x5A);
+	zl10353_single_write(fe, 0x66, 0xE9);
+	zl10353_single_write(fe, 0x62, 0x0A);
+
+	state->config.pll_set(fe, param, pllbuf + 1);
+	zl10353_write(fe, pllbuf, sizeof(pllbuf));
+
+	zl10353_single_write(fe, 0x70, 0x01);
+	udelay(250);
+	zl10353_single_write(fe, 0xE4, 0x00);
+	zl10353_single_write(fe, 0xE5, 0x2A);
+	zl10353_single_write(fe, 0xE9, 0x02);
+	zl10353_single_write(fe, 0xE7, 0x40);
+	zl10353_single_write(fe, 0xE8, 0x10);
+
+	return 0;
+}
+
+static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	int s6, s7, s8;
+
+	if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
+		return -EREMOTEIO;
+	if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
+		return -EREMOTEIO;
+	if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
+		return -EREMOTEIO;
+
+	*status = 0;
+	if (s6 & (1 << 2))
+		*status |= FE_HAS_CARRIER;
+	if (s6 & (1 << 1))
+		*status |= FE_HAS_VITERBI;
+	if (s6 & (1 << 5))
+		*status |= FE_HAS_LOCK;
+	if (s7 & (1 << 4))
+		*status |= FE_HAS_SYNC;
+	if (s8 & (1 << 6))
+		*status |= FE_HAS_SIGNAL;
+
+	if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
+	    (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
+		*status &= ~FE_HAS_LOCK;
+
+	return 0;
+}
+
+static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 _snr;
+
+	if (debug_regs)
+		zl10353_dump_regs(fe);
+
+	_snr = zl10353_read_register(state, SNR);
+	*snr = (_snr << 8) | _snr;
+
+	return 0;
+}
+
+static int zl10353_get_tune_settings(struct dvb_frontend *fe,
+				     struct dvb_frontend_tune_settings
+					 *fe_tune_settings)
+{
+	fe_tune_settings->min_delay_ms = 1000;
+	fe_tune_settings->step_size = 0;
+	fe_tune_settings->max_drift = 0;
+
+	return 0;
+}
+
+static int zl10353_init(struct dvb_frontend *fe)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
+	int rc = 0;
+
+	if (debug_regs)
+		zl10353_dump_regs(fe);
+
+	/* Do a "hard" reset if not already done */
+	if (zl10353_read_register(state, 0x50) != 0x03) {
+		rc = zl10353_write(fe, zl10353_reset_attach,
+				   sizeof(zl10353_reset_attach));
+		if (debug_regs)
+			zl10353_dump_regs(fe);
+	}
+
+	return 0;
+}
+
+static void zl10353_release(struct dvb_frontend *fe)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+
+	kfree(state);
+}
+
+static struct dvb_frontend_ops zl10353_ops;
+
+struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
+				    struct i2c_adapter *i2c)
+{
+	struct zl10353_state *state = NULL;
+
+	/* allocate memory for the internal state */
+	state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->i2c = i2c;
+	memcpy(&state->config, config, sizeof(struct zl10353_config));
+	memcpy(&state->ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
+
+	/* check if the demod is there */
+	if (zl10353_read_register(state, CHIP_ID) != ID_ZL10353)
+		goto error;
+
+	/* create dvb_frontend */
+	state->frontend.ops = &state->ops;
+	state->frontend.demodulator_priv = state;
+
+	return &state->frontend;
+error:
+	kfree(state);
+	return NULL;
+}
+
+static struct dvb_frontend_ops zl10353_ops = {
+
+	.info = {
+		.name			= "Zarlink ZL10353 DVB-T",
+		.type			= FE_OFDM,
+		.frequency_min		= 174000000,
+		.frequency_max		= 862000000,
+		.frequency_stepsize	= 166667,
+		.frequency_tolerance	= 0,
+		.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_64 | FE_CAN_QAM_AUTO |
+			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
+			FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
+			FE_CAN_MUTE_TS
+	},
+
+	.release = zl10353_release,
+
+	.init = zl10353_init,
+	.sleep = zl10353_sleep,
+
+	.set_frontend = zl10353_set_parameters,
+	.get_tune_settings = zl10353_get_tune_settings,
+
+	.read_status = zl10353_read_status,
+	.read_snr = zl10353_read_snr,
+};
+
+module_param(debug_regs, int, 0644);
+MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
+
+MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
+MODULE_AUTHOR("Chris Pascoe");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(zl10353_attach);
+EXPORT_SYMBOL(zl10353_write);