[mirror_ubuntu-artful-kernel.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/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");

#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);

	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>
	23	#include <linux/videodev2.h>
	24	#include <media/v4l2-common.h>
	25	#include <linux/mutex.h>
	26
	27	#include "au0828.h"
	28
bc3c613c ST	29	/*
	30	* 1 = General debug messages
	31	* 2 = USB handling
	32	* 4 = I2C related
	33	* 8 = Bridge related
	34	*/
b33d24c4 AB	35	int au0828_debug;
b33d24c4 AB	36	module_param_named(debug, au0828_debug, int, 0644);
265a6510 ST	37	MODULE_PARM_DESC(debug, "enable debug messages");
265a6510 ST	38
265a6510 ST	39	#define _AU0828_BULKPIPE 0x03
	40	#define _BULKPIPESIZE 0xffff
	41
	42	static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	43	u16 index, unsigned char *cp, u16 size);
	44	static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	45	u16 index, unsigned char *cp, u16 size);
	46
	47	/* USB Direction */
	48	#define CMD_REQUEST_IN 0x00
	49	#define CMD_REQUEST_OUT 0x01
	50
	51	u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
	52	{
	53	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
b80f770a	54	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, dev->ctrlmsg[0]);
265a6510 ST	55	return dev->ctrlmsg[0];
	56	}
	57
	58	u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
	59	{
b80f770a	60	dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
18d73c58 MCC	61	return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
18d73c58 MCC	62	dev->ctrlmsg, 0);
265a6510 ST	63	}
	64
	65	static void cmd_msg_dump(struct au0828_dev *dev)
	66	{
	67	int i;
	68
18d73c58 MCC	69	for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
	70	dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
	71	"%02x %02x %02x %02x %02x %02x %02x %02x\n",
f07e8e4b	72	__func__,
265a6510 ST	73	dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
	74	dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
	75	dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
	76	dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
	77	dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
	78	dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
	79	dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
	80	dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
	81	}
	82
	83	static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	84	u16 index, unsigned char *cp, u16 size)
	85	{
	86	int status = -ENODEV;
	87	mutex_lock(&dev->mutex);
	88	if (dev->usbdev) {
	89
	90	/* cp must be memory that has been allocated by kmalloc */
	91	status = usb_control_msg(dev->usbdev,
	92	usb_sndctrlpipe(dev->usbdev, 0),
	93	request,
a8eb912c ST	94	USB_DIR_OUT \| USB_TYPE_VENDOR \|
a8eb912c ST	95	USB_RECIP_DEVICE,
265a6510 ST	96	value, index,
	97	cp, size, 1000);
	98
	99	status = min(status, 0);
	100
	101	if (status < 0) {
bc3c613c	102	printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
f07e8e4b	103	__func__, status);
265a6510 ST	104	}
	105
	106	}
	107	mutex_unlock(&dev->mutex);
	108	return status;
	109	}
	110
	111	static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	112	u16 index, unsigned char *cp, u16 size)
	113	{
	114	int status = -ENODEV;
	115	mutex_lock(&dev->mutex);
	116	if (dev->usbdev) {
	117
	118	memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
	119
	120	/* cp must be memory that has been allocated by kmalloc */
	121	status = usb_control_msg(dev->usbdev,
	122	usb_rcvctrlpipe(dev->usbdev, 0),
	123	request,
	124	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	125	value, index,
	126	cp, size, 1000);
	127
	128	status = min(status, 0);
	129
	130	if (status < 0) {
bc3c613c	131	printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
f07e8e4b	132	__func__, status);
18d73c58	133	} else
bc3c613c	134	cmd_msg_dump(dev);
265a6510 ST	135	}
	136	mutex_unlock(&dev->mutex);
	137	return status;
	138	}
a9c36aad	139
265a6510 ST	140	static void au0828_usb_disconnect(struct usb_interface *interface)
	141	{
	142	struct au0828_dev *dev = usb_get_intfdata(interface);
	143
f07e8e4b	144	dprintk(1, "%s()\n", __func__);
265a6510 ST	145
	146	/* Digital TV */
	147	au0828_dvb_unregister(dev);
	148
220be77c	149	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
f1add5b5	150	au0828_analog_unregister(dev);
8b2f0795	151
265a6510 ST	152	/* I2C */
	153	au0828_i2c_unregister(dev);
	154
b14667f3 DH	155	v4l2_device_unregister(&dev->v4l2_dev);
b14667f3 DH	156
265a6510 ST	157	usb_set_intfdata(interface, NULL);
	158
	159	mutex_lock(&dev->mutex);
	160	dev->usbdev = NULL;
	161	mutex_unlock(&dev->mutex);
	162
	163	kfree(dev);
	164
	165	}
	166
18d73c58	167	static int au0828_usb_probe(struct usb_interface *interface,
265a6510 ST	168	const struct usb_device_id *id)
265a6510 ST	169	{
4bb68510	170	int ifnum, retval;
265a6510 ST	171	struct au0828_dev *dev;
	172	struct usb_device *usbdev = interface_to_usbdev(interface);
	173
	174	ifnum = interface->altsetting->desc.bInterfaceNumber;
	175
	176	if (ifnum != 0)
	177	return -ENODEV;
	178
a9c36aad	179	dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
265a6510 ST	180	le16_to_cpu(usbdev->descriptor.idVendor),
	181	le16_to_cpu(usbdev->descriptor.idProduct),
	182	ifnum);
	183
	184	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	185	if (dev == NULL) {
f07e8e4b	186	printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
265a6510 ST	187	return -ENOMEM;
	188	}
	189
	190	mutex_init(&dev->mutex);
	191	mutex_init(&dev->dvb.lock);
	192	dev->usbdev = usbdev;
f1add5b5	193	dev->boardnr = id->driver_info;
265a6510	194
b14667f3	195	/* Create the v4l2_device */
a4124aa9	196	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
b14667f3 DH	197	if (retval) {
	198	printk(KERN_ERR "%s() v4l2_device_register failed\n",
	199	__func__);
	200	kfree(dev);
	201	return -EIO;
	202	}
	203
265a6510 ST	204	/* Power Up the bridge */
	205	au0828_write(dev, REG_600, 1 << 4);
	206
	207	/* Bring up the GPIO's and supporting devices */
	208	au0828_gpio_setup(dev);
	209
	210	/* I2C */
	211	au0828_i2c_register(dev);
	212
28930fa9 ST	213	/* Setup */
	214	au0828_card_setup(dev);
	215
8b2f0795	216	/* Analog TV */
220be77c	217	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
fc4ce6cd	218	au0828_analog_register(dev, interface);
8b2f0795	219
265a6510 ST	220	/* Digital TV */
	221	au0828_dvb_register(dev);
	222
fe78a49c DH	223	/* Store the pointer to the au0828_dev so it can be accessed in
	224	au0828_usb_disconnect */
	225	usb_set_intfdata(interface, dev);
	226
bc3c613c	227	printk(KERN_INFO "Registered device AU0828 [%s]\n",
f1add5b5	228	dev->board.name == NULL ? "Unset" : dev->board.name);
265a6510 ST	229
	230	return 0;
	231	}
	232
	233	static struct usb_driver au0828_usb_driver = {
	234	.name = DRIVER_NAME,
	235	.probe = au0828_usb_probe,
	236	.disconnect = au0828_usb_disconnect,
	237	.id_table = au0828_usb_id_table,
	238	};
	239
	240	static int __init au0828_init(void)
	241	{
	242	int ret;
	243
b33d24c4	244	if (au0828_debug & 1)
f07e8e4b	245	printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
bc3c613c	246
b33d24c4	247	if (au0828_debug & 2)
f07e8e4b	248	printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
bc3c613c	249
b33d24c4	250	if (au0828_debug & 4)
f07e8e4b	251	printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
bc3c613c	252
b33d24c4	253	if (au0828_debug & 8)
f07e8e4b MK	254	printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
f07e8e4b MK	255	__func__);
bc3c613c ST	256
bc3c613c ST	257	printk(KERN_INFO "au0828 driver loaded\n");
265a6510 ST	258
	259	ret = usb_register(&au0828_usb_driver);
	260	if (ret)
bc3c613c	261	printk(KERN_ERR "usb_register failed, error = %d\n", ret);
265a6510 ST	262
	263	return ret;
	264	}
	265
	266	static void __exit au0828_exit(void)
	267	{
	268	usb_deregister(&au0828_usb_driver);
	269	}
	270
	271	module_init(au0828_init);
	272	module_exit(au0828_exit);
	273
	274	MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
6d897616	275	MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
265a6510	276	MODULE_LICENSE("GPL");