Initial import

1 files changed, 317 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/zl10039.c b/drivers/media/dvb-frontends/zl10039.c
new file mode 100644
index 000000000..ee09ec26c
--- /dev/null
+++ b/drivers/media/dvb-frontends/zl10039.c
@@ -0,0 +1,317 @@
+/*
+ *  Driver for Zarlink ZL10039 DVB-S tuner
+ *
+ *  Copyright 2007 Jan D. Louw <jd.louw@mweb.co.za>
+ *
+ *  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/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/dvb/frontend.h>
+
+#include "dvb_frontend.h"
+#include "zl10039.h"
+
+static int debug;
+
+/* Max transfer size done by I2C transfer functions */
+#define MAX_XFER_SIZE  64
+
+#define dprintk(args...) \
+	do { \
+		if (debug) \
+			printk(KERN_DEBUG args); \
+	} while (0)
+
+enum zl10039_model_id {
+	ID_ZL10039 = 1
+};
+
+struct zl10039_state {
+	struct i2c_adapter *i2c;
+	u8 i2c_addr;
+	u8 id;
+};
+
+enum zl10039_reg_addr {
+	PLL0 = 0,
+	PLL1,
+	PLL2,
+	PLL3,
+	RFFE,
+	BASE0,
+	BASE1,
+	BASE2,
+	LO0,
+	LO1,
+	LO2,
+	LO3,
+	LO4,
+	LO5,
+	LO6,
+	GENERAL
+};
+
+static int zl10039_read(const struct zl10039_state *state,
+			const enum zl10039_reg_addr reg, u8 *buf,
+			const size_t count)
+{
+	u8 regbuf[] = { reg };
+	struct i2c_msg msg[] = {
+		{/* Write register address */
+			.addr = state->i2c_addr,
+			.flags = 0,
+			.buf = regbuf,
+			.len = 1,
+		}, {/* Read count bytes */
+			.addr = state->i2c_addr,
+			.flags = I2C_M_RD,
+			.buf = buf,
+			.len = count,
+		},
+	};
+
+	dprintk("%s\n", __func__);
+
+	if (i2c_transfer(state->i2c, msg, 2) != 2) {
+		dprintk("%s: i2c read error\n", __func__);
+		return -EREMOTEIO;
+	}
+
+	return 0; /* Success */
+}
+
+static int zl10039_write(struct zl10039_state *state,
+			const enum zl10039_reg_addr reg, const u8 *src,
+			const size_t count)
+{
+	u8 buf[MAX_XFER_SIZE];
+	struct i2c_msg msg = {
+		.addr = state->i2c_addr,
+		.flags = 0,
+		.buf = buf,
+		.len = count + 1,
+	};
+
+	if (1 + count > sizeof(buf)) {
+		printk(KERN_WARNING
+		       "%s: i2c wr reg=%04x: len=%zu is too big!\n",
+		       KBUILD_MODNAME, reg, count);
+		return -EINVAL;
+	}
+
+	dprintk("%s\n", __func__);
+	/* Write register address and data in one go */
+	buf[0] = reg;
+	memcpy(&buf[1], src, count);
+	if (i2c_transfer(state->i2c, &msg, 1) != 1) {
+		dprintk("%s: i2c write error\n", __func__);
+		return -EREMOTEIO;
+	}
+
+	return 0; /* Success */
+}
+
+static inline int zl10039_readreg(struct zl10039_state *state,
+				const enum zl10039_reg_addr reg, u8 *val)
+{
+	return zl10039_read(state, reg, val, 1);
+}
+
+static inline int zl10039_writereg(struct zl10039_state *state,
+				const enum zl10039_reg_addr reg,
+				const u8 val)
+{
+	return zl10039_write(state, reg, &val, 1);
+}
+
+static int zl10039_init(struct dvb_frontend *fe)
+{
+	struct zl10039_state *state = fe->tuner_priv;
+	int ret;
+
+	dprintk("%s\n", __func__);
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+	/* Reset logic */
+	ret = zl10039_writereg(state, GENERAL, 0x40);
+	if (ret < 0) {
+		dprintk("Note: i2c write error normal when resetting the "
+			"tuner\n");
+	}
+	/* Wake up */
+	ret = zl10039_writereg(state, GENERAL, 0x01);
+	if (ret < 0) {
+		dprintk("Tuner power up failed\n");
+		return ret;
+	}
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+}
+
+static int zl10039_sleep(struct dvb_frontend *fe)
+{
+	struct zl10039_state *state = fe->tuner_priv;
+	int ret;
+
+	dprintk("%s\n", __func__);
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+	ret = zl10039_writereg(state, GENERAL, 0x80);
+	if (ret < 0) {
+		dprintk("Tuner sleep failed\n");
+		return ret;
+	}
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+}
+
+static int zl10039_set_params(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct zl10039_state *state = fe->tuner_priv;
+	u8 buf[6];
+	u8 bf;
+	u32 fbw;
+	u32 div;
+	int ret;
+
+	dprintk("%s\n", __func__);
+	dprintk("Set frequency = %d, symbol rate = %d\n",
+			c->frequency, c->symbol_rate);
+
+	/* Assumed 10.111 MHz crystal oscillator */
+	/* Cancelled num/den 80 to prevent overflow */
+	div = (c->frequency * 1000) / 126387;
+	fbw = (c->symbol_rate * 27) / 32000;
+	/* Cancelled num/den 10 to prevent overflow */
+	bf = ((fbw * 5088) / 1011100) - 1;
+
+	/*PLL divider*/
+	buf[0] = (div >> 8) & 0x7f;
+	buf[1] = (div >> 0) & 0xff;
+	/*Reference divider*/
+	/* Select reference ratio of 80 */
+	buf[2] = 0x1D;
+	/*PLL test modes*/
+	buf[3] = 0x40;
+	/*RF Control register*/
+	buf[4] = 0x6E; /* Bypass enable */
+	/*Baseband filter cutoff */
+	buf[5] = bf;
+
+	/* Open i2c gate */
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+	/* BR = 10, Enable filter adjustment */
+	ret = zl10039_writereg(state, BASE1, 0x0A);
+	if (ret < 0)
+		goto error;
+	/* Write new config values */
+	ret = zl10039_write(state, PLL0, buf, sizeof(buf));
+	if (ret < 0)
+		goto error;
+	/* BR = 10, Disable filter adjustment */
+	ret = zl10039_writereg(state, BASE1, 0x6A);
+	if (ret < 0)
+		goto error;
+
+	/* Close i2c gate */
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+	return 0;
+error:
+	dprintk("Error setting tuner\n");
+	return ret;
+}
+
+static int zl10039_release(struct dvb_frontend *fe)
+{
+	struct zl10039_state *state = fe->tuner_priv;
+
+	dprintk("%s\n", __func__);
+	kfree(state);
+	fe->tuner_priv = NULL;
+	return 0;
+}
+
+static struct dvb_tuner_ops zl10039_ops = {
+	.release = zl10039_release,
+	.init = zl10039_init,
+	.sleep = zl10039_sleep,
+	.set_params = zl10039_set_params,
+};
+
+struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe,
+		u8 i2c_addr, struct i2c_adapter *i2c)
+{
+	struct zl10039_state *state = NULL;
+
+	dprintk("%s\n", __func__);
+	state = kmalloc(sizeof(struct zl10039_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	state->i2c = i2c;
+	state->i2c_addr = i2c_addr;
+
+	/* Open i2c gate */
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+	/* check if this is a valid tuner */
+	if (zl10039_readreg(state, GENERAL, &state->id) < 0) {
+		/* Close i2c gate */
+		if (fe->ops.i2c_gate_ctrl)
+			fe->ops.i2c_gate_ctrl(fe, 0);
+		goto error;
+	}
+	/* Close i2c gate */
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	state->id = state->id & 0x0f;
+	switch (state->id) {
+	case ID_ZL10039:
+		strcpy(fe->ops.tuner_ops.info.name,
+			"Zarlink ZL10039 DVB-S tuner");
+		break;
+	default:
+		dprintk("Chip ID=%x does not match a known type\n", state->id);
+		goto error;
+	}
+
+	memcpy(&fe->ops.tuner_ops, &zl10039_ops, sizeof(struct dvb_tuner_ops));
+	fe->tuner_priv = state;
+	dprintk("Tuner attached @ i2c address 0x%02x\n", i2c_addr);
+	return fe;
+error:
+	kfree(state);
+	return NULL;
+}
+EXPORT_SYMBOL(zl10039_attach);
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+MODULE_DESCRIPTION("Zarlink ZL10039 DVB-S tuner driver");
+MODULE_AUTHOR("Jan D. Louw <jd.louw@mweb.co.za>");
+MODULE_LICENSE("GPL");