[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / usb / 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);
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)
{
	u8 result = 0;

	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);

	return result;
}

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);
}

static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	u16 index)
{
	int status = -ENODEV;

	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, NULL, 0, 1000);

		status = min(status, 0);

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

	}

	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) {
		status = usb_control_msg(dev->usbdev,
				usb_rcvctrlpipe(dev->usbdev, 0),
				request,
				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				value, index,
				dev->ctrlmsg, size, 1000);

		status = min(status, 0);

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

		/* the host controller requires heap allocated memory, which
		   is why we didn't just pass "cp" into usb_control_msg */
		memcpy(cp, dev->ctrlmsg, size);
	}
	mutex_unlock(&dev->mutex);
	return status;
}

static void au0828_usb_release(struct au0828_dev *dev)
{
	/* I2C */
	au0828_i2c_unregister(dev);

	kfree(dev);
}

#ifdef CONFIG_VIDEO_AU0828_V4L2
static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
{
	struct au0828_dev *dev =
		container_of(v4l2_dev, struct au0828_dev, v4l2_dev);

	v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
	v4l2_device_unregister(&dev->v4l2_dev);
	au0828_usb_release(dev);
}
#endif

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);

	usb_set_intfdata(interface, NULL);
	mutex_lock(&dev->mutex);
	dev->usbdev = NULL;
	mutex_unlock(&dev->mutex);
#ifdef CONFIG_VIDEO_AU0828_V4L2
	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) {
		au0828_analog_unregister(dev);
		v4l2_device_disconnect(&dev->v4l2_dev);
		v4l2_device_put(&dev->v4l2_dev);
		return;
	}
#endif
	au0828_usb_release(dev);
}

static int au0828_usb_probe(struct usb_interface *interface,
	const struct usb_device_id *id)
{
	int ifnum;
#ifdef CONFIG_VIDEO_AU0828_V4L2
	int retval;
#endif
	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->lock);
	mutex_lock(&dev->lock);
	mutex_init(&dev->mutex);
	mutex_init(&dev->dvb.lock);
	dev->usbdev = usbdev;
	dev->boardnr = id->driver_info;

#ifdef CONFIG_VIDEO_AU0828_V4L2
	dev->v4l2_dev.release = au0828_usb_v4l2_release;

	/* Create the v4l2_device */
	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
	if (retval) {
		pr_err("%s() v4l2_device_register failed\n",
		       __func__);
		mutex_unlock(&dev->lock);
		kfree(dev);
		return retval;
	}
	/* This control handler will inherit the controls from au8522 */
	retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
	if (retval) {
		pr_err("%s() v4l2_ctrl_handler_init failed\n",
		       __func__);
		mutex_unlock(&dev->lock);
		kfree(dev);
		return retval;
	}
	dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
#endif

	/* 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);

#ifdef CONFIG_VIDEO_AU0828_V4L2
	/* Analog TV */
	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
		au0828_analog_register(dev, interface);
#endif

	/* 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);

	mutex_unlock(&dev->lock);

	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");
MODULE_VERSION("0.0.2");
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,
8ff63de6	49	u16 index);
265a6510 ST	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	{
77fc2863 DH	59	u8 result = 0;
	60
	61	recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
	62	dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
	63
	64	return result;
265a6510 ST	65	}
	66
	67	u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
	68	{
b80f770a	69	dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
8ff63de6	70	return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
265a6510 ST	71	}
265a6510 ST	72
265a6510	73	static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
8ff63de6	74	u16 index)
265a6510 ST	75	{
265a6510 ST	76	int status = -ENODEV;
8ff63de6	77
265a6510 ST	78	if (dev->usbdev) {
	79
	80	/* cp must be memory that has been allocated by kmalloc */
	81	status = usb_control_msg(dev->usbdev,
	82	usb_sndctrlpipe(dev->usbdev, 0),
	83	request,
a8eb912c ST	84	USB_DIR_OUT \| USB_TYPE_VENDOR \|
a8eb912c ST	85	USB_RECIP_DEVICE,
8ff63de6	86	value, index, NULL, 0, 1000);
265a6510 ST	87
	88	status = min(status, 0);
	89
	90	if (status < 0) {
bc3c613c	91	printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
f07e8e4b	92	__func__, status);
265a6510 ST	93	}
	94
	95	}
8ff63de6	96
265a6510 ST	97	return status;
	98	}
	99
	100	static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
	101	u16 index, unsigned char *cp, u16 size)
	102	{
	103	int status = -ENODEV;
	104	mutex_lock(&dev->mutex);
	105	if (dev->usbdev) {
265a6510 ST	106	status = usb_control_msg(dev->usbdev,
	107	usb_rcvctrlpipe(dev->usbdev, 0),
	108	request,
	109	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	110	value, index,
77fc2863	111	dev->ctrlmsg, size, 1000);
265a6510 ST	112
	113	status = min(status, 0);
	114
	115	if (status < 0) {
bc3c613c	116	printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
f07e8e4b	117	__func__, status);
77fc2863 DH	118	}
	119
	120	/* the host controller requires heap allocated memory, which
	121	is why we didn't just pass "cp" into usb_control_msg */
	122	memcpy(cp, dev->ctrlmsg, size);
265a6510 ST	123	}
	124	mutex_unlock(&dev->mutex);
	125	return status;
	126	}
a9c36aad	127
823beb7e	128	static void au0828_usb_release(struct au0828_dev *dev)
265a6510	129	{
265a6510 ST	130	/* I2C */
	131	au0828_i2c_unregister(dev);
	132
823beb7e HV	133	kfree(dev);
	134	}
	135
8a4e7866	136	#ifdef CONFIG_VIDEO_AU0828_V4L2
823beb7e HV	137	static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
	138	{
	139	struct au0828_dev *dev =
	140	container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
	141
e8c26f45	142	v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
b14667f3	143	v4l2_device_unregister(&dev->v4l2_dev);
823beb7e HV	144	au0828_usb_release(dev);
823beb7e HV	145	}
8a4e7866	146	#endif
b14667f3	147
823beb7e HV	148	static void au0828_usb_disconnect(struct usb_interface *interface)
	149	{
	150	struct au0828_dev *dev = usb_get_intfdata(interface);
	151
	152	dprintk(1, "%s()\n", __func__);
	153
	154	/* Digital TV */
	155	au0828_dvb_unregister(dev);
265a6510	156
823beb7e	157	usb_set_intfdata(interface, NULL);
265a6510 ST	158	mutex_lock(&dev->mutex);
	159	dev->usbdev = NULL;
	160	mutex_unlock(&dev->mutex);
823beb7e HV	161	#ifdef CONFIG_VIDEO_AU0828_V4L2
	162	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) {
	163	au0828_analog_unregister(dev);
	164	v4l2_device_disconnect(&dev->v4l2_dev);
	165	v4l2_device_put(&dev->v4l2_dev);
	166	return;
	167	}
	168	#endif
	169	au0828_usb_release(dev);
265a6510 ST	170	}
265a6510 ST	171
18d73c58	172	static int au0828_usb_probe(struct usb_interface *interface,
265a6510 ST	173	const struct usb_device_id *id)
265a6510 ST	174	{
8a4e7866 MK	175	int ifnum;
	176	#ifdef CONFIG_VIDEO_AU0828_V4L2
	177	int retval;
	178	#endif
265a6510 ST	179	struct au0828_dev *dev;
	180	struct usb_device *usbdev = interface_to_usbdev(interface);
	181
	182	ifnum = interface->altsetting->desc.bInterfaceNumber;
	183
	184	if (ifnum != 0)
	185	return -ENODEV;
	186
a9c36aad	187	dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
265a6510 ST	188	le16_to_cpu(usbdev->descriptor.idVendor),
	189	le16_to_cpu(usbdev->descriptor.idProduct),
	190	ifnum);
	191
ee3436b8 DH	192	/*
	193	* Make sure we have 480 Mbps of bandwidth, otherwise things like
	194	* video stream wouldn't likely work, since 12 Mbps is generally
	195	* not enough even for most Digital TV streams.
	196	*/
d6a9a430	197	if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
ee3436b8 DH	198	printk(KERN_ERR "au0828: Device initialization failed.\n");
	199	printk(KERN_ERR "au0828: Device must be connected to a "
	200	"high-speed USB 2.0 port.\n");
	201	return -ENODEV;
	202	}
	203
265a6510 ST	204	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
265a6510 ST	205	if (dev == NULL) {
f07e8e4b	206	printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
265a6510 ST	207	return -ENOMEM;
	208	}
	209
549ee4df DH	210	mutex_init(&dev->lock);
549ee4df DH	211	mutex_lock(&dev->lock);
265a6510 ST	212	mutex_init(&dev->mutex);
	213	mutex_init(&dev->dvb.lock);
	214	dev->usbdev = usbdev;
f1add5b5	215	dev->boardnr = id->driver_info;
265a6510	216
8a4e7866	217	#ifdef CONFIG_VIDEO_AU0828_V4L2
823beb7e HV	218	dev->v4l2_dev.release = au0828_usb_v4l2_release;
823beb7e HV	219
b14667f3	220	/* Create the v4l2_device */
a4124aa9	221	retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
b14667f3	222	if (retval) {
e8c26f45	223	pr_err("%s() v4l2_device_register failed\n",
b14667f3	224	__func__);
549ee4df	225	mutex_unlock(&dev->lock);
b14667f3	226	kfree(dev);
e8c26f45	227	return retval;
b14667f3	228	}
e8c26f45 HV	229	/* This control handler will inherit the controls from au8522 */
	230	retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
	231	if (retval) {
	232	pr_err("%s() v4l2_ctrl_handler_init failed\n",
	233	__func__);
	234	mutex_unlock(&dev->lock);
	235	kfree(dev);
	236	return retval;
	237	}
	238	dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
8a4e7866	239	#endif
b14667f3	240
265a6510 ST	241	/* Power Up the bridge */
	242	au0828_write(dev, REG_600, 1 << 4);
	243
	244	/* Bring up the GPIO's and supporting devices */
	245	au0828_gpio_setup(dev);
	246
	247	/* I2C */
	248	au0828_i2c_register(dev);
	249
28930fa9 ST	250	/* Setup */
	251	au0828_card_setup(dev);
	252
8a4e7866	253	#ifdef CONFIG_VIDEO_AU0828_V4L2
8b2f0795	254	/* Analog TV */
220be77c	255	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
fc4ce6cd	256	au0828_analog_register(dev, interface);
8a4e7866	257	#endif
8b2f0795	258
265a6510 ST	259	/* Digital TV */
	260	au0828_dvb_register(dev);
	261
fe78a49c DH	262	/* Store the pointer to the au0828_dev so it can be accessed in
	263	au0828_usb_disconnect */
	264	usb_set_intfdata(interface, dev);
	265
bc3c613c	266	printk(KERN_INFO "Registered device AU0828 [%s]\n",
f1add5b5	267	dev->board.name == NULL ? "Unset" : dev->board.name);
265a6510	268
549ee4df DH	269	mutex_unlock(&dev->lock);
549ee4df DH	270
265a6510 ST	271	return 0;
	272	}
	273
	274	static struct usb_driver au0828_usb_driver = {
	275	.name = DRIVER_NAME,
	276	.probe = au0828_usb_probe,
	277	.disconnect = au0828_usb_disconnect,
	278	.id_table = au0828_usb_id_table,
	279	};
	280
	281	static int __init au0828_init(void)
	282	{
	283	int ret;
	284
b33d24c4	285	if (au0828_debug & 1)
f07e8e4b	286	printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
bc3c613c	287
b33d24c4	288	if (au0828_debug & 2)
f07e8e4b	289	printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
bc3c613c	290
b33d24c4	291	if (au0828_debug & 4)
f07e8e4b	292	printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
bc3c613c	293
b33d24c4	294	if (au0828_debug & 8)
f07e8e4b MK	295	printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
f07e8e4b MK	296	__func__);
bc3c613c ST	297
bc3c613c ST	298	printk(KERN_INFO "au0828 driver loaded\n");
265a6510 ST	299
	300	ret = usb_register(&au0828_usb_driver);
	301	if (ret)
bc3c613c	302	printk(KERN_ERR "usb_register failed, error = %d\n", ret);
265a6510 ST	303
	304	return ret;
	305	}
	306
	307	static void __exit au0828_exit(void)
	308	{
	309	usb_deregister(&au0828_usb_driver);
	310	}
	311
	312	module_init(au0828_init);
	313	module_exit(au0828_exit);
	314
	315	MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
6d897616	316	MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
265a6510	317	MODULE_LICENSE("GPL");
1990d50b	318	MODULE_VERSION("0.0.2");