drivers/media/dvb/dvb-usb/dib0700_core.c - maze/linux - Git at Google

 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
  *
  *	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.
  *
  *  Copyright (C) 2005-6 DiBcom, SA
  */
 #include "dib0700.h"

 /* debug */
 int dvb_usb_dib0700_debug;
 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);

 /* expecting rx buffer: request data[0] data[1] ... data[2] */
 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
 {
 	int status;

 	deb_data(">>> ");
 	debug_dump(tx,txlen,deb_data);

 	status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
 		tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
 		USB_CTRL_GET_TIMEOUT);

 	if (status != txlen)
 		deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);

 	return status < 0 ? status : 0;
 }

 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
 static int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
 {
 	u16 index, value;
 	int status;

 	if (txlen < 2) {
 		err("tx buffer length is smaller than 2. Makes no sense.");
 		return -EINVAL;
 	}
 	if (txlen > 4) {
 		err("tx buffer length is larger than 4. Not supported.");
 		return -EINVAL;
 	}

 	deb_data(">>> ");
 	debug_dump(tx,txlen,deb_data);

 	value = ((txlen - 2) << 8) | tx[1];
 	index = 0;
 	if (txlen > 2)
 		index |= (tx[2] << 8);
 	if (txlen > 3)
 		index |= tx[3];

 	/* think about swapping here */
 	value = le16_to_cpu(value);
 	index = le16_to_cpu(index);

 	status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
 			USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
 			USB_CTRL_GET_TIMEOUT);

 	if (status < 0)
 		deb_info("ep 0 read error (status = %d)\n",status);

 	deb_data("<<< ");
 	debug_dump(rx,rxlen,deb_data);

 	return status; /* length in case of success */
 }

 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
 {
 	u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
 	return dib0700_ctrl_wr(d,buf,3);
 }

 /*
  * I2C master xfer function
  */
 static int dib0700_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg *msg,int num)
 {
 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
 	int i,len;
 	u8 buf[255];

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

 	for (i = 0; i < num; i++) {
 		/* fill in the address */
 		buf[1] = (msg[i].addr << 1);
 		/* fill the buffer */
 		memcpy(&buf[2], msg[i].buf, msg[i].len);

 		/* write/read request */
 		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 			buf[0] = REQUEST_I2C_READ;
 			buf[1] |= 1;

 			/* special thing in the current firmware: when length is zero the read-failed */
 			if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
 				deb_info("I2C read failed on address %x\n", msg[i].addr);
 				break;
 			}

 			msg[i+1].len = len;

 			i++;
 		} else {
 			buf[0] = REQUEST_I2C_WRITE;
 			if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
 				break;
 		}
 	}

 	mutex_unlock(&d->i2c_mutex);
 	return i;
 }

 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
 {
 	return I2C_FUNC_I2C;
 }

 struct i2c_algorithm dib0700_i2c_algo = {
 	.master_xfer   = dib0700_i2c_xfer,
 	.functionality = dib0700_i2c_func,
 };

 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
 			struct dvb_usb_device_description **desc, int *cold)
 {
 	u8 buf[3] = { REQUEST_SET_GPIO, 4, (GPIO_IN << 7) | (0 << 6) }; // GPIO4 is save - used for I2C
 	*cold = usb_control_msg(udev, usb_sndctrlpipe(udev,0),
 		buf[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, buf, 3, USB_CTRL_GET_TIMEOUT) != 3;

 	deb_info("cold: %d\n", *cold);
 	return 0;
 }

 static int dib0700_jumpram(struct usb_device *udev, u32 address)
 {
 	int ret, actlen;
 	u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
 		(address >> 24) & 0xff,
 		(address >> 16) & 0xff,
 		(address >> 8)  & 0xff,
 		 address        & 0xff };

 	if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
 		deb_fw("jumpram to 0x%x failed\n",address);
 		return ret;
 	}
 	if (actlen != 8) {
 		deb_fw("jumpram to 0x%x failed\n",address);
 		return -EIO;
 	}
 	return 0;
 }

 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
 {
 	struct hexline hx;
 	int pos = 0, ret, act_len;

 	u8 buf[260];

 	while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
 		deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);

 		buf[0] = hx.len;
 		buf[1] = (hx.addr >> 8) & 0xff;
 		buf[2] =  hx.addr       & 0xff;
 		buf[3] = hx.type;
 		memcpy(&buf[4],hx.data,hx.len);
 		buf[4+hx.len] = hx.chk;

 		ret = usb_bulk_msg(udev,
 			usb_sndbulkpipe(udev, 0x01),
 			buf,
 			hx.len + 5,
 			&act_len,
 			1000);

 		if (ret < 0) {
 			err("firmware download failed at %d with %d",pos,ret);
 			return ret;
 		}
 	}

 	if (ret == 0) {
 		/* start the firmware */
 		if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
 			info("firmware started successfully.");
 			msleep(100);
 		}
 	} else
 		ret = -EIO;

 	return ret;
 }

 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 {
 	struct dib0700_state *st = adap->dev->priv;
 	u8 b[4];

 	b[0] = REQUEST_ENABLE_VIDEO;
 	b[1] = 0x00;
 	b[2] = (0x01 << 4); /* Master mode */
 	b[3] = 0x00;

 	deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);

 	if (onoff)
 		st->channel_state |=   1 << adap->id;
 	else
 		st->channel_state &= ~(1 << adap->id);

 	b[2] |= st->channel_state;

 	if (st->channel_state) /* if at least one channel is active */
 		b[1] = (0x01 << 4) | 0x00;

 	deb_info("data for streaming: %x %x\n",b[1],b[2]);

 	return dib0700_ctrl_wr(adap->dev, b, 4);
 }

 static int dib0700_probe(struct usb_interface *intf,
 		const struct usb_device_id *id)
 {
 	int i;

 	for (i = 0; i < dib0700_device_count; i++)
 		if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE, NULL) == 0)
 			return 0;

 	return -ENODEV;
 }

 static struct usb_driver dib0700_driver = {
 	.name       = "dvb_usb_dib0700",
 	.probe      = dib0700_probe,
 	.disconnect = dvb_usb_device_exit,
 	.id_table   = dib0700_usb_id_table,
 };

 /* module stuff */
 static int __init dib0700_module_init(void)
 {
 	int result;
 	info("loaded with support for %d different device-types", dib0700_device_count);
 	if ((result = usb_register(&dib0700_driver))) {
 		err("usb_register failed. Error number %d",result);
 		return result;
 	}

 	return 0;
 }

 static void __exit dib0700_module_exit(void)
 {
 	/* deregister this driver from the USB subsystem */
 	usb_deregister(&dib0700_driver);
 }

 module_init (dib0700_module_init);
 module_exit (dib0700_module_exit);

 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
 MODULE_VERSION("1.0");
 MODULE_LICENSE("GPL");
	/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
	*
	* 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.
	*
	* Copyright (C) 2005-6 DiBcom, SA
	*/
	#include "dib0700.h"

	/* debug */
	int dvb_usb_dib0700_debug;
	module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
	MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);

	/* expecting rx buffer: request data[0] data[1] ... data[2] */
	static int dib0700_ctrl_wr(struct dvb_usb_device d, u8 tx, u8 txlen)
	{
	int status;

	deb_data(">>> ");
	debug_dump(tx,txlen,deb_data);

	status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
	tx[0], USB_TYPE_VENDOR \| USB_DIR_OUT, 0, 0, tx, txlen,
	USB_CTRL_GET_TIMEOUT);

	if (status != txlen)
	deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);

	return status < 0 ? status : 0;
	}

	/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
	static int dib0700_ctrl_rd(struct dvb_usb_device d, u8 tx, u8 txlen, u8 *rx, u8 rxlen)
	{
	u16 index, value;
	int status;

	if (txlen < 2) {
	err("tx buffer length is smaller than 2. Makes no sense.");
	return -EINVAL;
	}
	if (txlen > 4) {
	err("tx buffer length is larger than 4. Not supported.");
	return -EINVAL;
	}

	deb_data(">>> ");
	debug_dump(tx,txlen,deb_data);

	value = ((txlen - 2) << 8) \| tx[1];
	index = 0;
	if (txlen > 2)
	index \|= (tx[2] << 8);
	if (txlen > 3)
	index \|= tx[3];

	/* think about swapping here */
	value = le16_to_cpu(value);
	index = le16_to_cpu(index);

	status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
	USB_TYPE_VENDOR \| USB_DIR_IN, value, index, rx, rxlen,
	USB_CTRL_GET_TIMEOUT);

	if (status < 0)
	deb_info("ep 0 read error (status = %d)\n",status);

	deb_data("<<< ");
	debug_dump(rx,rxlen,deb_data);

	return status; /* length in case of success */
	}

	int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
	{
	u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) \| ((gpio_val & 0x01) << 6) };
	return dib0700_ctrl_wr(d,buf,3);
	}

	/*
	* I2C master xfer function
	*/
	static int dib0700_i2c_xfer(struct i2c_adapter adap,struct i2c_msg msg,int num)
	{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	int i,len;
	u8 buf[255];

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

	for (i = 0; i < num; i++) {
	/* fill in the address */
	buf[1] = (msg[i].addr << 1);
	/* fill the buffer */
	memcpy(&buf[2], msg[i].buf, msg[i].len);

	/* write/read request */
	if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
	buf[0] = REQUEST_I2C_READ;
	buf[1] \|= 1;

	/* special thing in the current firmware: when length is zero the read-failed */
	if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
	deb_info("I2C read failed on address %x\n", msg[i].addr);
	break;
	}

	msg[i+1].len = len;

	i++;
	} else {
	buf[0] = REQUEST_I2C_WRITE;
	if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
	break;
	}
	}

	mutex_unlock(&d->i2c_mutex);
	return i;
	}

	static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
	{
	return I2C_FUNC_I2C;
	}

	struct i2c_algorithm dib0700_i2c_algo = {
	.master_xfer = dib0700_i2c_xfer,
	.functionality = dib0700_i2c_func,
	};

	int dib0700_identify_state(struct usb_device udev, struct dvb_usb_device_properties props,
	struct dvb_usb_device_description *desc, int cold)
	{
	u8 buf[3] = { REQUEST_SET_GPIO, 4, (GPIO_IN << 7) \| (0 << 6) }; // GPIO4 is save - used for I2C
	*cold = usb_control_msg(udev, usb_sndctrlpipe(udev,0),
	buf[0], USB_TYPE_VENDOR \| USB_DIR_OUT, 0, 0, buf, 3, USB_CTRL_GET_TIMEOUT) != 3;

	deb_info("cold: %d\n", *cold);
	return 0;
	}

	static int dib0700_jumpram(struct usb_device *udev, u32 address)
	{
	int ret, actlen;
	u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
	(address >> 24) & 0xff,
	(address >> 16) & 0xff,
	(address >> 8) & 0xff,
	address & 0xff };

	if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
	deb_fw("jumpram to 0x%x failed\n",address);
	return ret;
	}
	if (actlen != 8) {
	deb_fw("jumpram to 0x%x failed\n",address);
	return -EIO;
	}
	return 0;
	}

	int dib0700_download_firmware(struct usb_device udev, const struct firmware fw)
	{
	struct hexline hx;
	int pos = 0, ret, act_len;

	u8 buf[260];

	while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
	deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);

	buf[0] = hx.len;
	buf[1] = (hx.addr >> 8) & 0xff;
	buf[2] = hx.addr & 0xff;
	buf[3] = hx.type;
	memcpy(&buf[4],hx.data,hx.len);
	buf[4+hx.len] = hx.chk;

	ret = usb_bulk_msg(udev,
	usb_sndbulkpipe(udev, 0x01),
	buf,
	hx.len + 5,
	&act_len,
	1000);

	if (ret < 0) {
	err("firmware download failed at %d with %d",pos,ret);
	return ret;
	}
	}

	if (ret == 0) {
	/* start the firmware */
	if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
	info("firmware started successfully.");
	msleep(100);
	}
	} else
	ret = -EIO;

	return ret;
	}

	int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
	{
	struct dib0700_state *st = adap->dev->priv;
	u8 b[4];

	b[0] = REQUEST_ENABLE_VIDEO;
	b[1] = 0x00;
	b[2] = (0x01 << 4); /* Master mode */
	b[3] = 0x00;

	deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);

	if (onoff)
	st->channel_state \|= 1 << adap->id;
	else
	st->channel_state &= ~(1 << adap->id);

	b[2] \|= st->channel_state;

	if (st->channel_state) /* if at least one channel is active */
	b[1] = (0x01 << 4) \| 0x00;

	deb_info("data for streaming: %x %x\n",b[1],b[2]);

	return dib0700_ctrl_wr(adap->dev, b, 4);
	}

	static int dib0700_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	int i;

	for (i = 0; i < dib0700_device_count; i++)
	if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE, NULL) == 0)
	return 0;

	return -ENODEV;
	}

	static struct usb_driver dib0700_driver = {
	.name = "dvb_usb_dib0700",
	.probe = dib0700_probe,
	.disconnect = dvb_usb_device_exit,
	.id_table = dib0700_usb_id_table,
	};

	/* module stuff */
	static int __init dib0700_module_init(void)
	{
	int result;
	info("loaded with support for %d different device-types", dib0700_device_count);
	if ((result = usb_register(&dib0700_driver))) {
	err("usb_register failed. Error number %d",result);
	return result;
	}

	return 0;
	}

	static void __exit dib0700_module_exit(void)
	{
	/* deregister this driver from the USB subsystem */
	usb_deregister(&dib0700_driver);
	}

	module_init (dib0700_module_init);
	module_exit (dib0700_module_exit);

	MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
	MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
	MODULE_VERSION("1.0");
	MODULE_LICENSE("GPL");