cxusb.c

trident tm5600的linux驱动

/* DVB USB compliant linux driver for Conexant USB reference design.
 *
 * The Conexant reference design I saw on their website was only for analogue
 * capturing (using the cx25842). The box I took to write this driver (reverse
 * engineered) is the one labeled Medion MD95700. In addition to the cx25842
 * for analogue capturing it also has a cx22702 DVB-T demodulator on the main
 * board. Besides it has a atiremote (X10) and a USB2.0 hub onboard.
 *
 * Maybe it is a little bit premature to call this driver cxusb, but I assume
 * the USB protocol is identical or at least inherited from the reference
 * design, so it can be reused for the "analogue-only" device (if it will
 * appear at all).
 *
 * TODO: Use the cx25840-driver for the analogue part
 *
 * Copyright (C) 2005 Patrick Boettcher ([e-mail])
 * Copyright (C) 2006 Michael Krufky ([e-mail])
 * Copyright (C) 2006, 2007 Chris Pascoe ([e-mail])
 *
 *   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, version 2.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */
#include <media/tuner.h>
#include <linux/vmalloc.h>

#include "cxusb.h"

#include "cx22702.h"
#include "lgdt330x.h"
#include "mt352.h"
#include "mt352_priv.h"
#include "zl10353.h"
#include "tuner-xc2028.h"
#include "tuner-simple.h"
#include "mxl5005s.h"
#include "dib7000p.h"
#include "dib0070.h"
#include "lgs8gl5.h"

/* debug */
static int dvb_usb_cxusb_debug;
module_param_named(debug, dvb_usb_cxusb_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define deb_info(args...)   dprintk(dvb_usb_cxusb_debug, 0x03, args)
#define deb_i2c(args...)    dprintk(dvb_usb_cxusb_debug, 0x02, args)

static int cxusb_ctrl_msg(struct dvb_usb_device *d,
			  u8 cmd, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
{
	int wo = (rbuf == NULL || rlen == 0); /* write-only */
	u8 sndbuf[1+wlen];
	memset(sndbuf, 0, 1+wlen);

	sndbuf[0] = cmd;
	memcpy(&sndbuf[1], wbuf, wlen);
	if (wo)
		return dvb_usb_generic_write(d, sndbuf, 1+wlen);
	else
		return dvb_usb_generic_rw(d, sndbuf, 1+wlen, rbuf, rlen, 0);
}

/* GPIO */
static void cxusb_gpio_tuner(struct dvb_usb_device *d, int onoff)
{
	struct cxusb_state *st = d->priv;
	u8 o[2], i;

	if (st->gpio_write_state[GPIO_TUNER] == onoff)
		return;

	o[0] = GPIO_TUNER;
	o[1] = onoff;
	cxusb_ctrl_msg(d, CMD_GPIO_WRITE, o, 2, &i, 1);

	if (i != 0x01)
		deb_info("gpio_write failed.\n");

	st->gpio_write_state[GPIO_TUNER] = onoff;
}

static int cxusb_bluebird_gpio_rw(struct dvb_usb_device *d, u8 changemask,
				 u8 newval)
{
	u8 o[2], gpio_state;
	int rc;

	o[0] = 0xff & ~changemask;	/* mask of bits to keep */
	o[1] = newval & changemask;	/* new values for bits  */

	rc = cxusb_ctrl_msg(d, CMD_BLUEBIRD_GPIO_RW, o, 2, &gpio_state, 1);
	if (rc < 0 || (gpio_state & changemask) != (newval & changemask))
		deb_info("bluebird_gpio_write failed.\n");

	return rc < 0 ? rc : gpio_state;
}

static void cxusb_bluebird_gpio_pulse(struct dvb_usb_device *d, u8 pin, int low)
{
	cxusb_bluebird_gpio_rw(d, pin, low ? 0 : pin);
	msleep(5);
	cxusb_bluebird_gpio_rw(d, pin, low ? pin : 0);
}

static void cxusb_nano2_led(struct dvb_usb_device *d, int onoff)
{
	cxusb_bluebird_gpio_rw(d, 0x40, onoff ? 0 : 0x40);
}

static int cxusb_d680_dmb_gpio_tuner(struct dvb_usb_device *d,
		u8 addr, int onoff)
{
	u8  o[2] = {addr, onoff};
	u8  i;
	int rc;

	rc = cxusb_ctrl_msg(d, CMD_GPIO_WRITE, o, 2, &i, 1);

	if (rc < 0)
		return rc;
	if (i == 0x01)
		return 0;
	else {
		deb_info("gpio_write failed.\n");
		return -EIO;
	}
}

/* I2C */
static int cxusb_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
			  int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	int i;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;

	for (i = 0; i < num; i++) {

		if (d->udev->descriptor.idVendor == USB_VID_MEDION)
			switch (msg[i].addr) {
			case 0x63:
				cxusb_gpio_tuner(d, 0);
				break;
			default:
				cxusb_gpio_tuner(d, 1);
				break;
			}

		if (msg[i].flags & I2C_M_RD) {
			/* read only */
			u8 obuf[3], ibuf[1+msg[i].len];
			obuf[0] = 0;
			obuf[1] = msg[i].len;
			obuf[2] = msg[i].addr;
			if (cxusb_ctrl_msg(d, CMD_I2C_READ,
					   obuf, 3,
					   ibuf, 1+msg[i].len) < 0) {
				warn("i2c read failed");
				break;
			}
			memcpy(msg[i].buf, &ibuf[1], msg[i].len);
		} else if (i+1 < num && (msg[i+1].flags & I2C_M_RD) &&
			   msg[i].addr == msg[i+1].addr) {
			/* write to then read from same address */
			u8 obuf[3+msg[i].len], ibuf[1+msg[i+1].len];
			obuf[0] = msg[i].len;
			obuf[1] = msg[i+1].len;
			obuf[2] = msg[i].addr;
			memcpy(&obuf[3], msg[i].buf, msg[i].len);

			if (cxusb_ctrl_msg(d, CMD_I2C_READ,
					   obuf, 3+msg[i].len,
					   ibuf, 1+msg[i+1].len) < 0)
				break;

			if (ibuf[0] != 0x08)
				deb_i2c("i2c read may have failed\n");

			memcpy(msg[i+1].buf, &ibuf[1], msg[i+1].len);

			i++;
		} else {
			/* write only */
			u8 obuf[2+msg[i].len], ibuf;
			obuf[0] = msg[i].addr;
			obuf[1] = msg[i].len;
			memcpy(&obuf[2], msg[i].buf, msg[i].len);

			if (cxusb_ctrl_msg(d, CMD_I2C_WRITE, obuf,
					   2+msg[i].len, &ibuf,1) < 0)
				break;
			if (ibuf != 0x08)
				deb_i2c("i2c write may have failed\n");
		}
	}

	mutex_unlock(&d->i2c_mutex);
	return i == num ? num : -EREMOTEIO;
}

static u32 cxusb_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

static struct i2c_algorithm cxusb_i2c_algo = {
	.master_xfer   = cxusb_i2c_xfer,
	.functionality = cxusb_i2c_func,
};

static int cxusb_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	u8 b = 0;
	if (onoff)
		return cxusb_ctrl_msg(d, CMD_POWER_ON, &b, 1, NULL, 0);
	else
		return cxusb_ctrl_msg(d, CMD_POWER_OFF, &b, 1, NULL, 0);
}

static int cxusb_aver_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	int ret;
	if (!onoff)
		return cxusb_ctrl_msg(d, CMD_POWER_OFF, NULL, 0, NULL, 0);
	if (d->state == DVB_USB_STATE_INIT &&
	    usb_set_interface(d->udev, 0, 0) < 0)
		err("set interface failed");
	do {} while (!(ret = cxusb_ctrl_msg(d, CMD_POWER_ON, NULL, 0, NULL, 0)) &&
		   !(ret = cxusb_ctrl_msg(d, 0x15, NULL, 0, NULL, 0)) &&
		   !(ret = cxusb_ctrl_msg(d, 0x17, NULL, 0, NULL, 0)) && 0);
	if (!ret) {
		/* FIXME: We don't know why, but we need to configure the
		 * lgdt3303 with the register settings below on resume */
		int i;
		u8 buf, bufs[] = {
			0x0e, 0x2, 0x00, 0x7f,
			0x0e, 0x2, 0x02, 0xfe,
			0x0e, 0x2, 0x02, 0x01,
			0x0e, 0x2, 0x00, 0x03,
			0x0e, 0x2, 0x0d, 0x40,
			0x0e, 0x2, 0x0e, 0x87,
			0x0e, 0x2, 0x0f, 0x8e,
			0x0e, 0x2, 0x10, 0x01,
			0x0e, 0x2, 0x14, 0xd7,
			0x0e, 0x2, 0x47, 0x88,
		};
		msleep(20);
		for (i = 0; i < sizeof(bufs)/sizeof(u8); i += 4/sizeof(u8)) {
			ret = cxusb_ctrl_msg(d, CMD_I2C_WRITE,
					     bufs+i, 4, &buf, 1);
			if (ret)
				break;
			if (buf != 0x8)
				return -EREMOTEIO;
		}
	}
	return ret;
}

static int cxusb_bluebird_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	u8 b = 0;
	if (onoff)
		return cxusb_ctrl_msg(d, CMD_POWER_ON, &b, 1, NULL, 0);
	else
		return 0;
}

static int cxusb_nano2_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	int rc = 0;

	rc = cxusb_power_ctrl(d, onoff);
	if (!onoff)
		cxusb_nano2_led(d, 0);

	return rc;
}

static int cxusb_d680_dmb_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	int ret;
	u8  b;
	ret = cxusb_power_ctrl(d, onoff);
	if (!onoff)
		return ret;

	msleep(128);
	cxusb_ctrl_msg(d, CMD_DIGITAL, NULL, 0, &b, 1);
	msleep(100);
	return ret;
}

static int cxusb_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	u8 buf[2] = { 0x03, 0x00 };
	if (onoff)
		cxusb_ctrl_msg(adap->dev, CMD_STREAMING_ON, buf, 2, NULL, 0);
	else
		cxusb_ctrl_msg(adap->dev, CMD_STREAMING_OFF, NULL, 0, NULL, 0);

	return 0;
}

static int cxusb_aver_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	if (onoff)
		cxusb_ctrl_msg(adap->dev, CMD_AVER_STREAM_ON, NULL, 0, NULL, 0);
	else
		cxusb_ctrl_msg(adap->dev, CMD_AVER_STREAM_OFF,
			       NULL, 0, NULL, 0);
	return 0;
}

static void cxusb_d680_dmb_drain_message(struct dvb_usb_device *d)
{
	int       ep = d->props.generic_bulk_ctrl_endpoint;
	const int timeout = 100;
	const int junk_len = 32;
	u8        *junk;
	int       rd_count;

	/* Discard remaining data in video pipe */
	junk = kmalloc(junk_len, GFP_KERNEL);
	if (!junk)
		return;
	while (1) {
		if (usb_bulk_msg(d->udev,
			usb_rcvbulkpipe(d->udev, ep),
			junk, junk_len, &rd_count, timeout) < 0)
			break;
		if (!rd_count)
			break;
	}
	kfree(junk);
}

static void cxusb_d680_dmb_drain_video(struct dvb_usb_device *d)
{
	struct usb_data_stream_properties *p = &d->props.adapter[0].stream;
	const int timeout = 100;
	const int junk_len = p->u.bulk.buffersize;
	u8        *junk;
	int       rd_count;

	/* Discard remaining data in video pipe */
	junk = kmalloc(junk_len, GFP_KERNEL);
	if (!junk)
		return;
	while (1) {
		if (usb_bulk_msg(d->udev,
			usb_rcvbulkpipe(d->udev, p->endpoint),
			junk, junk_len, &rd_count, timeout) < 0)
			break;
		if (!rd_count)
			break;
	}
	kfree(junk);
}

static int cxusb_d680_dmb_streaming_ctrl(
		struct dvb_usb_adapter *adap, int onoff)
{
	if (onoff) {
		u8 buf[2] = { 0x03, 0x00 };
		cxusb_d680_dmb_drain_video(adap->dev);
		return cxusb_ctrl_msg(adap->dev, CMD_STREAMING_ON,
			buf, sizeof(buf), NULL, 0);
	} else {
		int ret = cxusb_ctrl_msg(adap->dev,
			CMD_STREAMING_OFF, NULL, 0, NULL, 0);
		return ret;
	}
}

static int cxusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
{
	struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
	u8 ircode[4];
	int i;

	cxusb_ctrl_msg(d, CMD_GET_IR_CODE, NULL, 0, ircode, 4);

	*event = 0;
	*state = REMOTE_NO_KEY_PRESSED;

	for (i = 0; i < d->props.rc_key_map_size; i++) {
		if (keymap[i].custom == ircode[2] &&
		    keymap[i].data == ircode[3]) {
			*event = keymap[i].event;
			*state = REMOTE_KEY_PRESSED;

			return 0;
		}
	}

	return 0;
}

static int cxusb_bluebird2_rc_query(struct dvb_usb_device *d, u32 *event,
				    int *state)
{
	struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
	u8 ircode[4];
	int i;
	struct i2c_msg msg = { .addr = 0x6b, .flags = I2C_M_RD,
			       .buf = ircode, .len = 4 };

	*event = 0;
	*state = REMOTE_NO_KEY_PRESSED;

	if (cxusb_i2c_xfer(&d->i2c_adap, &msg, 1) != 1)
		return 0;

	for (i = 0; i < d->props.rc_key_map_size; i++) {
		if (keymap[i].custom == ircode[1] &&
		    keymap[i].data == ircode[2]) {
			*event = keymap[i].event;
			*state = REMOTE_KEY_PRESSED;

			return 0;
		}
	}

	return 0;
}

static int cxusb_d680_dmb_rc_query(struct dvb_usb_device *d, u32 *event,
		int *state)
{
	struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
	u8 ircode[2];
	int i;

	*event = 0;
	*state = REMOTE_NO_KEY_PRESSED;

	if (cxusb_ctrl_msg(d, 0x10, NULL, 0, ircode, 2) < 0)
		return 0;

	for (i = 0; i < d->props.rc_key_map_size; i++) {
		if (keymap[i].custom == ircode[0] &&
		    keymap[i].data == ircode[1]) {
			*event = keymap[i].event;
			*state = REMOTE_KEY_PRESSED;

			return 0;
		}
	}

	return 0;
}

static struct dvb_usb_rc_key dvico_mce_rc_keys[] = {
	{ 0xfe, 0x02, KEY_TV },
	{ 0xfe, 0x0e, KEY_MP3 },
	{ 0xfe, 0x1a, KEY_DVD },