[net-next-2.6.git] / drivers / media / video / au0828 / au0828-core.c

/*
 *  Driver for the Auvitek USB bridge
 *
 *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
 *
 *  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/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/mutex.h>

#include "au0828.h"

/*
 * 1 = General debug messages
 * 2 = USB handling
 * 4 = I2C related
 * 8 = Bridge related
 */
int au0828_debug;
module_param_named(debug, au0828_debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages");

static unsigned int disable_usb_speed_check;
module_param(disable_usb_speed_check, int, 0444);
MODULE_PARM_DESC(disable_usb_speed_check,
		 "override min bandwidth requirement of 480M bps");

#define _AU0828_BULKPIPE 0x03
#define _BULKPIPESIZE 0xffff

static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index, unsigned char *cp, u16 size);
static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index, unsigned char *cp, u16 size);

/* USB Direction */
#define CMD_REQUEST_IN		0x00
#define CMD_REQUEST_OUT		0x01

u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
{
	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, dev->ctrlmsg[0]);
	return dev->ctrlmsg[0];
}

u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
{
	dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
	return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
				dev->ctrlmsg, 0);
}

static void cmd_msg_dump(struct au0828_dev *dev)
{
	int i;

	for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
		dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
				"%02x %02x %02x %02x %02x %02x %02x %02x\n",
			__func__,
			dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
			dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
			dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
			dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
			dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
			dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
			dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
			dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
}

static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index, unsigned char *cp, u16 size)
{
	int status = -ENODEV;
	mutex_lock(&dev->mutex);
	if (dev->usbdev) {

		/* cp must be memory that has been allocated by kmalloc */
		status = usb_control_msg(dev->usbdev,
				usb_sndctrlpipe(dev->usbdev, 0),
				request,
				USB_DIR_OUT | USB_TYPE_VENDOR |
					USB_RECIP_DEVICE,
				value, index,
				cp, size, 1000);

		status = min(status, 0);

		if (status < 0) {
			printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
				__func__, status);
		}

	}
	mutex_unlock(&dev->mutex);
	return status;
}

static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index, unsigned char *cp, u16 size)
{
	int status = -ENODEV;
	mutex_lock(&dev->mutex);
	if (dev->usbdev) {

		memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));

		/* cp must be memory that has been allocated by kmalloc */
		status = usb_control_msg(dev->usbdev,
				usb_rcvctrlpipe(dev->usbdev, 0),
				request,
				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				value, index,
				cp, size, 1000);

		status = min(status, 0);

		if (status < 0) {
			printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
				__func__, status);
		} else
			cmd_msg_dump(dev);
	}
	mutex_unlock(&dev->mutex);
	return status;
}

static void au0828_usb_disconnect(struct usb_interface *interface)
{
	struct au0828_dev *dev = usb_get_intfdata(interface);

	dprintk(1, "%s()\n", __func__);

	/* Digital TV */
	au0828_dvb_unregister(dev);

	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
		au0828_analog_unregister(dev);

	/* I2C */
	au0828_i2c_unregister(dev);

	v4l2_device_unregister(&dev->v4l2_dev);

	usb_set_intfdata(interface, NULL);

	mutex_lock(&dev->mutex);
	dev->usbdev = NULL;
	mutex_unlock(&dev->mutex);

	kfree(dev);

}

static int au0828_usb_probe(struct usb_interface *interface,
	const struct usb_device_id *id)
{
	int ifnum, retval;
	struct au0828_dev *dev;
	struct usb_device *usbdev = interface_to_usbdev(interface);

	ifnum = interface->altsetting->desc.bInterfaceNumber;

	if (ifnum != 0)
		return -ENODEV;

	dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
		le16_to_cpu(usbdev->descriptor.idVendor),
		le16_to_cpu(usbdev->descriptor.idProduct),
		ifnum);

	/*
	 * Make sure we have 480 Mbps of bandwidth, otherwise things like
	 * video stream wouldn't likely work, since 12 Mbps is generally
	 * not enough even for most Digital TV streams.
	 */
	if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
		printk(KERN_ERR "au0828: Device initialization failed.\n");
		printk(KERN_ERR "au0828: Device must be connected to a "
		       "high-speed USB 2.0 port.\n");
		return -ENODEV;
	}

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (dev == NULL) {
		printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
		return -ENOMEM;
	}

	mutex_init(&dev->mutex);
	mutex_init(&dev->dvb.lock);
	dev->usbdev = usbdev;
	dev->boardnr = id->driver_info;

	/* Create the v4l2_device */
	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
	if (retval) {
		printk(KERN_ERR "%s() v4l2_device_register failed\n",
		       __func__);
		kfree(dev);
		return -EIO;
	}

	/* Power Up the bridge */
	au0828_write(dev, REG_600, 1 << 4);

	/* Bring up the GPIO's and supporting devices */
	au0828_gpio_setup(dev);

	/* I2C */
	au0828_i2c_register(dev);

	/* Setup */
	au0828_card_setup(dev);

	/* Analog TV */
	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
		au0828_analog_register(dev, interface);

	/* Digital TV */
	au0828_dvb_register(dev);

	/* Store the pointer to the au0828_dev so it can be accessed in
	   au0828_usb_disconnect */
	usb_set_intfdata(interface, dev);

	printk(KERN_INFO "Registered device AU0828 [%s]\n",
		dev->board.name == NULL ? "Unset" : dev->board.name);

	return 0;
}

static struct usb_driver au0828_usb_driver = {
	.name		= DRIVER_NAME,
	.probe		= au0828_usb_probe,
	.disconnect	= au0828_usb_disconnect,
	.id_table	= au0828_usb_id_table,
};

static int __init au0828_init(void)
{
	int ret;

	if (au0828_debug & 1)
		printk(KERN_INFO "%s() Debugging is enabled\n", __func__);

	if (au0828_debug & 2)
		printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);

	if (au0828_debug & 4)
		printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);

	if (au0828_debug & 8)
		printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
		       __func__);

	printk(KERN_INFO "au0828 driver loaded\n");

	ret = usb_register(&au0828_usb_driver);
	if (ret)
		printk(KERN_ERR "usb_register failed, error = %d\n", ret);

	return ret;
}

static void __exit au0828_exit(void)
{
	usb_deregister(&au0828_usb_driver);
}

module_init(au0828_init);
module_exit(au0828_exit);

MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
MODULE_LICENSE("GPL");
Commit	Line	Data
265a6510 ST	1	/*
	2	* Driver for the Auvitek USB bridge
	3	*
6d897616	4	* Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
265a6510 ST	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	*
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/module.h>
5a0e3ad6	23	#include <linux/slab.h>
265a6510 ST	24	#include <linux/videodev2.h>
	25	#include <media/v4l2-common.h>
	26	#include <linux/mutex.h>
	27
	28	#include "au0828.h"
	29
bc3c613c ST	30	/*
	31	* 1 = General debug messages
	32	* 2 = USB handling
	33	* 4 = I2C related
	34	* 8 = Bridge related
	35	*/
b33d24c4 AB	36	int au0828_debug;
b33d24c4 AB	37	module_param_named(debug, au0828_debug, int, 0644);
265a6510 ST	38	MODULE_PARM_DESC(debug, "enable debug messages");
265a6510 ST	39
d6a9a430 DH	40	static unsigned int disable_usb_speed_check;
	41	module_param(disable_usb_speed_check, int, 0444);
	42	MODULE_PARM_DESC(disable_usb_speed_check,
	43	"override min bandwidth requirement of 480M bps");
	44
265a6510 ST	45	#define _AU0828_BULKPIPE 0x03
	46	#define _BULKPIPESIZE 0xffff
	47
	48	static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	49	u16 index, unsigned char *cp, u16 size);
	50	static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	51	u16 index, unsigned char *cp, u16 size);
	52
	53	/* USB Direction */
	54	#define CMD_REQUEST_IN 0x00
	55	#define CMD_REQUEST_OUT 0x01
	56
	57	u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
	58	{
	59	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
b80f770a	60	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, dev->ctrlmsg[0]);
265a6510 ST	61	return dev->ctrlmsg[0];
	62	}
	63
	64	u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
	65	{
b80f770a	66	dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
18d73c58 MCC	67	return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
18d73c58 MCC	68	dev->ctrlmsg, 0);
265a6510 ST	69	}
	70
	71	static void cmd_msg_dump(struct au0828_dev *dev)
	72	{
	73	int i;
	74
18d73c58 MCC	75	for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
	76	dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
	77	"%02x %02x %02x %02x %02x %02x %02x %02x\n",
f07e8e4b	78	__func__,
265a6510 ST	79	dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
	80	dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
	81	dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
	82	dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
	83	dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
	84	dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
	85	dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
	86	dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
	87	}
	88
	89	static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	90	u16 index, unsigned char *cp, u16 size)
	91	{
	92	int status = -ENODEV;
	93	mutex_lock(&dev->mutex);
	94	if (dev->usbdev) {
	95
	96	/* cp must be memory that has been allocated by kmalloc */
	97	status = usb_control_msg(dev->usbdev,
	98	usb_sndctrlpipe(dev->usbdev, 0),
	99	request,
a8eb912c ST	100	USB_DIR_OUT \| USB_TYPE_VENDOR \|
a8eb912c ST	101	USB_RECIP_DEVICE,
265a6510 ST	102	value, index,
	103	cp, size, 1000);
	104
	105	status = min(status, 0);
	106
	107	if (status < 0) {
bc3c613c	108	printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
f07e8e4b	109	__func__, status);
265a6510 ST	110	}
	111
	112	}
	113	mutex_unlock(&dev->mutex);
	114	return status;
	115	}
	116
	117	static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	118	u16 index, unsigned char *cp, u16 size)
	119	{
	120	int status = -ENODEV;
	121	mutex_lock(&dev->mutex);
	122	if (dev->usbdev) {
	123
	124	memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
	125
	126	/* cp must be memory that has been allocated by kmalloc */
	127	status = usb_control_msg(dev->usbdev,
	128	usb_rcvctrlpipe(dev->usbdev, 0),
	129	request,
	130	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	131	value, index,
	132	cp, size, 1000);
	133
	134	status = min(status, 0);
	135
	136	if (status < 0) {
bc3c613c	137	printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
f07e8e4b	138	__func__, status);
18d73c58	139	} else
bc3c613c	140	cmd_msg_dump(dev);
265a6510 ST	141	}
	142	mutex_unlock(&dev->mutex);
	143	return status;
	144	}
a9c36aad	145
265a6510 ST	146	static void au0828_usb_disconnect(struct usb_interface *interface)
	147	{
	148	struct au0828_dev *dev = usb_get_intfdata(interface);
	149
f07e8e4b	150	dprintk(1, "%s()\n", __func__);
265a6510 ST	151
	152	/* Digital TV */
	153	au0828_dvb_unregister(dev);
	154
220be77c	155	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
f1add5b5	156	au0828_analog_unregister(dev);
8b2f0795	157
265a6510 ST	158	/* I2C */
	159	au0828_i2c_unregister(dev);
	160
b14667f3 DH	161	v4l2_device_unregister(&dev->v4l2_dev);
b14667f3 DH	162
265a6510 ST	163	usb_set_intfdata(interface, NULL);
	164
	165	mutex_lock(&dev->mutex);
	166	dev->usbdev = NULL;
	167	mutex_unlock(&dev->mutex);
	168
	169	kfree(dev);
	170
	171	}
	172
18d73c58	173	static int au0828_usb_probe(struct usb_interface *interface,
265a6510 ST	174	const struct usb_device_id *id)
265a6510 ST	175	{
4bb68510	176	int ifnum, retval;
265a6510 ST	177	struct au0828_dev *dev;
	178	struct usb_device *usbdev = interface_to_usbdev(interface);
	179
	180	ifnum = interface->altsetting->desc.bInterfaceNumber;
	181
	182	if (ifnum != 0)
	183	return -ENODEV;
	184
a9c36aad	185	dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
265a6510 ST	186	le16_to_cpu(usbdev->descriptor.idVendor),
	187	le16_to_cpu(usbdev->descriptor.idProduct),
	188	ifnum);
	189
ee3436b8 DH	190	/*
	191	* Make sure we have 480 Mbps of bandwidth, otherwise things like
	192	* video stream wouldn't likely work, since 12 Mbps is generally
	193	* not enough even for most Digital TV streams.
	194	*/
d6a9a430	195	if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
ee3436b8 DH	196	printk(KERN_ERR "au0828: Device initialization failed.\n");
	197	printk(KERN_ERR "au0828: Device must be connected to a "
	198	"high-speed USB 2.0 port.\n");
	199	return -ENODEV;
	200	}
	201
265a6510 ST	202	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
265a6510 ST	203	if (dev == NULL) {
f07e8e4b	204	printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
265a6510 ST	205	return -ENOMEM;
	206	}
	207
	208	mutex_init(&dev->mutex);
	209	mutex_init(&dev->dvb.lock);
	210	dev->usbdev = usbdev;
f1add5b5	211	dev->boardnr = id->driver_info;
265a6510	212
b14667f3	213	/* Create the v4l2_device */
a4124aa9	214	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
b14667f3 DH	215	if (retval) {
	216	printk(KERN_ERR "%s() v4l2_device_register failed\n",
	217	__func__);
	218	kfree(dev);
	219	return -EIO;
	220	}
	221
265a6510 ST	222	/* Power Up the bridge */
	223	au0828_write(dev, REG_600, 1 << 4);
	224
	225	/* Bring up the GPIO's and supporting devices */
	226	au0828_gpio_setup(dev);
	227
	228	/* I2C */
	229	au0828_i2c_register(dev);
	230
28930fa9 ST	231	/* Setup */
	232	au0828_card_setup(dev);
	233
8b2f0795	234	/* Analog TV */
220be77c	235	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
fc4ce6cd	236	au0828_analog_register(dev, interface);
8b2f0795	237
265a6510 ST	238	/* Digital TV */
	239	au0828_dvb_register(dev);
	240
fe78a49c DH	241	/* Store the pointer to the au0828_dev so it can be accessed in
	242	au0828_usb_disconnect */
	243	usb_set_intfdata(interface, dev);
	244
bc3c613c	245	printk(KERN_INFO "Registered device AU0828 [%s]\n",
f1add5b5	246	dev->board.name == NULL ? "Unset" : dev->board.name);
265a6510 ST	247
	248	return 0;
	249	}
	250
	251	static struct usb_driver au0828_usb_driver = {
	252	.name = DRIVER_NAME,
	253	.probe = au0828_usb_probe,
	254	.disconnect = au0828_usb_disconnect,
	255	.id_table = au0828_usb_id_table,
	256	};
	257
	258	static int __init au0828_init(void)
	259	{
	260	int ret;
	261
b33d24c4	262	if (au0828_debug & 1)
f07e8e4b	263	printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
bc3c613c	264
b33d24c4	265	if (au0828_debug & 2)
f07e8e4b	266	printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
bc3c613c	267
b33d24c4	268	if (au0828_debug & 4)
f07e8e4b	269	printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
bc3c613c	270
b33d24c4	271	if (au0828_debug & 8)
f07e8e4b MK	272	printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
f07e8e4b MK	273	__func__);
bc3c613c ST	274
bc3c613c ST	275	printk(KERN_INFO "au0828 driver loaded\n");
265a6510 ST	276
	277	ret = usb_register(&au0828_usb_driver);
	278	if (ret)
bc3c613c	279	printk(KERN_ERR "usb_register failed, error = %d\n", ret);
265a6510 ST	280
	281	return ret;
	282	}
	283
	284	static void __exit au0828_exit(void)
	285	{
	286	usb_deregister(&au0828_usb_driver);
	287	}
	288
	289	module_init(au0828_init);
	290	module_exit(au0828_exit);
	291
	292	MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
6d897616	293	MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
265a6510	294	MODULE_LICENSE("GPL");