[net-next-2.6.git] / drivers / media / video / gspca / benq.c

/*
 * Benq DC E300 subdriver
 *
 * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
 *
 * 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
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#define MODULE_NAME "benq"

#include "gspca.h"

MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
MODULE_DESCRIPTION("Benq DC E300 USB Camera Driver");
MODULE_LICENSE("GPL");

/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;	/* !! must be the first item */
};

/* V4L2 controls supported by the driver */
static const struct ctrl sd_ctrls[] = {
};

static const struct v4l2_pix_format vga_mode[] = {
	{320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 3 / 8 + 590,
		.colorspace = V4L2_COLORSPACE_JPEG},
};

static void sd_isoc_irq(struct urb *urb);

/* -- write a register -- */
static void reg_w(struct gspca_dev *gspca_dev,
			u16 value, u16 index)
{
	struct usb_device *dev = gspca_dev->dev;
	int ret;

	if (gspca_dev->usb_err < 0)
		return;
	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
			0x02,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			value,
			index,
			NULL,
			0,
			500);
	if (ret < 0) {
		err("reg_w err %d", ret);
		gspca_dev->usb_err = ret;
	}
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
			const struct usb_device_id *id)
{
	gspca_dev->cam.cam_mode = vga_mode;
	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
	gspca_dev->cam.no_urb_create = 1;
	gspca_dev->cam.reverse_alts = 1;
	return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
	return 0;
}

static int sd_isoc_init(struct gspca_dev *gspca_dev)
{
	int ret;

	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface,
		gspca_dev->nbalt - 1);
	if (ret < 0) {
		err("usb_set_interface failed");
		return ret;
	}
/*	reg_w(gspca_dev, 0x0003, 0x0002); */
	return 0;
}

/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
	struct urb *urb;
	int i, n;

	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
#if MAX_NURBS < 4
#error "Not enough URBs in the gspca table"
#endif
#define SD_PKT_SZ 64
#define SD_NPKT 32
	for (n = 0; n < 4; n++) {
		urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
		if (!urb) {
			err("usb_alloc_urb failed");
			return -ENOMEM;
		}
		gspca_dev->urb[n] = urb;
		urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
						SD_PKT_SZ * SD_NPKT,
						GFP_KERNEL,
						&urb->transfer_dma);

		if (urb->transfer_buffer == NULL) {
			err("usb_alloc_coherent failed");
			return -ENOMEM;
		}
		urb->dev = gspca_dev->dev;
		urb->context = gspca_dev;
		urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT;
		urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
					n & 1 ? 0x82 : 0x83);
		urb->transfer_flags = URB_ISO_ASAP
					| URB_NO_TRANSFER_DMA_MAP;
		urb->interval = 1;
		urb->complete = sd_isoc_irq;
		urb->number_of_packets = SD_NPKT;
		for (i = 0; i < SD_NPKT; i++) {
			urb->iso_frame_desc[i].length = SD_PKT_SZ;
			urb->iso_frame_desc[i].offset = SD_PKT_SZ * i;
		}
	}

	return gspca_dev->usb_err;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
	reg_w(gspca_dev, 0x003c, 0x0003);
	reg_w(gspca_dev, 0x003c, 0x0004);
	reg_w(gspca_dev, 0x003c, 0x0005);
	reg_w(gspca_dev, 0x003c, 0x0006);
	reg_w(gspca_dev, 0x003c, 0x0007);
	usb_set_interface(gspca_dev->dev, gspca_dev->iface,
					gspca_dev->nbalt - 1);
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,		/* isoc packet */
			int len)		/* iso packet length */
{
	/* unused */
}

/* reception of an URB */
static void sd_isoc_irq(struct urb *urb)
{
	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
	struct urb *urb0;
	u8 *data;
	int i, st;

	PDEBUG(D_PACK, "sd isoc irq");
	if (!gspca_dev->streaming)
		return;
	if (urb->status != 0) {
		if (urb->status == -ESHUTDOWN)
			return;		/* disconnection */
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			return;
#endif
		err("urb status: %d", urb->status);
		return;
	}

	/* if this is a control URN (ep 0x83), wait */
	if (urb == gspca_dev->urb[0] || urb == gspca_dev->urb[2])
		return;

	/* scan both received URBs */
	if (urb == gspca_dev->urb[1])
		urb0 = gspca_dev->urb[0];
	else
		urb0 = gspca_dev->urb[2];
	for (i = 0; i < urb->number_of_packets; i++) {

		/* check the packet status and length */
		if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ
		    || urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) {
			PDEBUG(D_ERR, "ISOC bad lengths %d / %d",
				urb0->iso_frame_desc[i].actual_length,
				urb->iso_frame_desc[i].actual_length);
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}
		st = urb0->iso_frame_desc[i].status;
		if (st == 0)
			st = urb->iso_frame_desc[i].status;
		if (st) {
			err("ISOC data error: [%d] status=%d",
				i, st);
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}

		/*
		 * The images are received in URBs of different endpoints
		 * (0x83 and 0x82).
		 * Image pieces in URBs of ep 0x83 are continuated in URBs of
		 * ep 0x82 of the same index.
		 * The packets in the URBs of endpoint 0x83 start with:
		 *	- 80 ba/bb 00 00 = start of image followed by 'ff d8'
		 *	- 04 ba/bb oo oo = image piece
		 *		where 'oo oo' is the image offset
						(not cheked)
		 *	- (other -> bad frame)
		 * The images are JPEG encoded with full header and
		 * normal ff escape.
		 * The end of image ('ff d9') may occur in any URB.
		 * (not cheked)
		 */
		data = (u8 *) urb0->transfer_buffer
					+ urb0->iso_frame_desc[i].offset;
		if (data[0] == 0x80 && (data[1] & 0xfe) == 0xba) {

			/* new image */
			gspca_frame_add(gspca_dev, LAST_PACKET,
					NULL, 0);
			gspca_frame_add(gspca_dev, FIRST_PACKET,
					data + 4, SD_PKT_SZ - 4);
		} else if (data[0] == 0x04 && (data[1] & 0xfe) == 0xba) {
			gspca_frame_add(gspca_dev, INTER_PACKET,
					data + 4, SD_PKT_SZ - 4);
		} else {
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}
		data = (u8 *) urb->transfer_buffer
					+ urb->iso_frame_desc[i].offset;
			gspca_frame_add(gspca_dev, INTER_PACKET,
					data, SD_PKT_SZ);
	}

	/* resubmit the URBs */
	st = usb_submit_urb(urb0, GFP_ATOMIC);
	if (st < 0)
		err("usb_submit_urb(0) ret %d", st);
	st = usb_submit_urb(urb, GFP_ATOMIC);
	if (st < 0)
		err("usb_submit_urb() ret %d", st);
}

/* sub-driver description */
static const struct sd_desc sd_desc = {
	.name = MODULE_NAME,
	.ctrls = sd_ctrls,
	.nctrls = ARRAY_SIZE(sd_ctrls),
	.config = sd_config,
	.init = sd_init,
	.isoc_init = sd_isoc_init,
	.start = sd_start,
	.stopN = sd_stopN,
	.pkt_scan = sd_pkt_scan,
};

/* -- module initialisation -- */
static const __devinitdata struct usb_device_id device_table[] = {
	{USB_DEVICE(0x04a5, 0x3035)},
	{}
};
MODULE_DEVICE_TABLE(usb, device_table);

/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
				THIS_MODULE);
}

static struct usb_driver sd_driver = {
	.name = MODULE_NAME,
	.id_table = device_table,
	.probe = sd_probe,
	.disconnect = gspca_disconnect,
#ifdef CONFIG_PM
	.suspend = gspca_suspend,
	.resume = gspca_resume,
#endif
};

/* -- module insert / remove -- */
static int __init sd_mod_init(void)
{
	return usb_register(&sd_driver);
}
static void __exit sd_mod_exit(void)
{
	usb_deregister(&sd_driver);
}

module_init(sd_mod_init);
module_exit(sd_mod_exit);
Commit	Line	Data
0a71d9ce JFM	1	/*
	2	* Benq DC E300 subdriver
	3	*
	4	* Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
	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	* 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	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	#define MODULE_NAME "benq"
	22
	23	#include "gspca.h"
	24
	25	MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
	26	MODULE_DESCRIPTION("Benq DC E300 USB Camera Driver");
	27	MODULE_LICENSE("GPL");
	28
	29	/* specific webcam descriptor */
	30	struct sd {
	31	struct gspca_dev gspca_dev; /* !! must be the first item */
	32	};
	33
	34	/* V4L2 controls supported by the driver */
7e64dc4c	35	static const struct ctrl sd_ctrls[] = {
0a71d9ce JFM	36	};
	37
	38	static const struct v4l2_pix_format vga_mode[] = {
	39	{320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
	40	.bytesperline = 320,
	41	.sizeimage = 320 * 240 * 3 / 8 + 590,
	42	.colorspace = V4L2_COLORSPACE_JPEG},
	43	};
	44
	45	static void sd_isoc_irq(struct urb *urb);
	46
	47	/* -- write a register -- */
	48	static void reg_w(struct gspca_dev *gspca_dev,
	49	u16 value, u16 index)
	50	{
	51	struct usb_device *dev = gspca_dev->dev;
	52	int ret;
	53
	54	if (gspca_dev->usb_err < 0)
	55	return;
	56	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	57	0x02,
	58	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	59	value,
	60	index,
	61	NULL,
	62	0,
	63	500);
	64	if (ret < 0) {
8dbf3e7c	65	err("reg_w err %d", ret);
0a71d9ce JFM	66	gspca_dev->usb_err = ret;
	67	}
	68	}
	69
	70	/* this function is called at probe time */
	71	static int sd_config(struct gspca_dev *gspca_dev,
	72	const struct usb_device_id *id)
	73	{
	74	gspca_dev->cam.cam_mode = vga_mode;
	75	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
	76	gspca_dev->cam.no_urb_create = 1;
	77	gspca_dev->cam.reverse_alts = 1;
	78	return 0;
	79	}
	80
	81	/* this function is called at probe and resume time */
	82	static int sd_init(struct gspca_dev *gspca_dev)
	83	{
	84	return 0;
	85	}
	86
	87	static int sd_isoc_init(struct gspca_dev *gspca_dev)
	88	{
	89	int ret;
	90
	91	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface,
	92	gspca_dev->nbalt - 1);
	93	if (ret < 0) {
	94	err("usb_set_interface failed");
	95	return ret;
	96	}
	97	/* reg_w(gspca_dev, 0x0003, 0x0002); */
	98	return 0;
	99	}
	100
	101	/* -- start the camera -- */
	102	static int sd_start(struct gspca_dev *gspca_dev)
	103	{
	104	struct urb *urb;
	105	int i, n;
	106
	107	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
	108	#if MAX_NURBS < 4
	109	#error "Not enough URBs in the gspca table"
	110	#endif
	111	#define SD_PKT_SZ 64
	112	#define SD_NPKT 32
	113	for (n = 0; n < 4; n++) {
	114	urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
	115	if (!urb) {
	116	err("usb_alloc_urb failed");
	117	return -ENOMEM;
	118	}
	119	gspca_dev->urb[n] = urb;
997ea58e	120	urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
0a71d9ce JFM	121	SD_PKT_SZ * SD_NPKT,
	122	GFP_KERNEL,
	123	&urb->transfer_dma);
	124
	125	if (urb->transfer_buffer == NULL) {
997ea58e	126	err("usb_alloc_coherent failed");
0a71d9ce JFM	127	return -ENOMEM;
	128	}
	129	urb->dev = gspca_dev->dev;
	130	urb->context = gspca_dev;
	131	urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT;
	132	urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
	133	n & 1 ? 0x82 : 0x83);
	134	urb->transfer_flags = URB_ISO_ASAP
	135	\| URB_NO_TRANSFER_DMA_MAP;
	136	urb->interval = 1;
	137	urb->complete = sd_isoc_irq;
	138	urb->number_of_packets = SD_NPKT;
	139	for (i = 0; i < SD_NPKT; i++) {
	140	urb->iso_frame_desc[i].length = SD_PKT_SZ;
	141	urb->iso_frame_desc[i].offset = SD_PKT_SZ * i;
	142	}
	143	}
	144
	145	return gspca_dev->usb_err;
	146	}
	147
	148	static void sd_stopN(struct gspca_dev *gspca_dev)
	149	{
	150	reg_w(gspca_dev, 0x003c, 0x0003);
	151	reg_w(gspca_dev, 0x003c, 0x0004);
	152	reg_w(gspca_dev, 0x003c, 0x0005);
	153	reg_w(gspca_dev, 0x003c, 0x0006);
	154	reg_w(gspca_dev, 0x003c, 0x0007);
780e3121 JFM	155	usb_set_interface(gspca_dev->dev, gspca_dev->iface,
780e3121 JFM	156	gspca_dev->nbalt - 1);
0a71d9ce JFM	157	}
	158
	159	static void sd_pkt_scan(struct gspca_dev *gspca_dev,
	160	u8 data, / isoc packet */
	161	int len) /* iso packet length */
	162	{
	163	/* unused */
	164	}
	165
	166	/* reception of an URB */
	167	static void sd_isoc_irq(struct urb *urb)
	168	{
	169	struct gspca_dev gspca_dev = (struct gspca_dev ) urb->context;
	170	struct urb *urb0;
	171	u8 *data;
	172	int i, st;
	173
	174	PDEBUG(D_PACK, "sd isoc irq");
	175	if (!gspca_dev->streaming)
	176	return;
	177	if (urb->status != 0) {
	178	if (urb->status == -ESHUTDOWN)
	179	return; /* disconnection */
	180	#ifdef CONFIG_PM
	181	if (gspca_dev->frozen)
	182	return;
	183	#endif
8dbf3e7c	184	err("urb status: %d", urb->status);
0a71d9ce JFM	185	return;
	186	}
	187
	188	/* if this is a control URN (ep 0x83), wait */
	189	if (urb == gspca_dev->urb[0] \|\| urb == gspca_dev->urb[2])
	190	return;
	191
	192	/* scan both received URBs */
	193	if (urb == gspca_dev->urb[1])
	194	urb0 = gspca_dev->urb[0];
	195	else
	196	urb0 = gspca_dev->urb[2];
	197	for (i = 0; i < urb->number_of_packets; i++) {
	198
	199	/* check the packet status and length */
	200	if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ
	201	\|\| urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) {
	202	PDEBUG(D_ERR, "ISOC bad lengths %d / %d",
	203	urb0->iso_frame_desc[i].actual_length,
	204	urb->iso_frame_desc[i].actual_length);
	205	gspca_dev->last_packet_type = DISCARD_PACKET;
	206	continue;
	207	}
	208	st = urb0->iso_frame_desc[i].status;
	209	if (st == 0)
	210	st = urb->iso_frame_desc[i].status;
	211	if (st) {
8dbf3e7c	212	err("ISOC data error: [%d] status=%d",
0a71d9ce JFM	213	i, st);
	214	gspca_dev->last_packet_type = DISCARD_PACKET;
	215	continue;
	216	}
	217
	218	/*
	219	* The images are received in URBs of different endpoints
	220	* (0x83 and 0x82).
	221	* Image pieces in URBs of ep 0x83 are continuated in URBs of
	222	* ep 0x82 of the same index.
	223	* The packets in the URBs of endpoint 0x83 start with:
	224	* - 80 ba/bb 00 00 = start of image followed by 'ff d8'
	225	* - 04 ba/bb oo oo = image piece
	226	* where 'oo oo' is the image offset
	227	(not cheked)
	228	* - (other -> bad frame)
	229	* The images are JPEG encoded with full header and
	230	* normal ff escape.
	231	* The end of image ('ff d9') may occur in any URB.
	232	* (not cheked)
	233	*/
	234	data = (u8 *) urb0->transfer_buffer
	235	+ urb0->iso_frame_desc[i].offset;
	236	if (data[0] == 0x80 && (data[1] & 0xfe) == 0xba) {
	237
	238	/* new image */
	239	gspca_frame_add(gspca_dev, LAST_PACKET,
	240	NULL, 0);
	241	gspca_frame_add(gspca_dev, FIRST_PACKET,
	242	data + 4, SD_PKT_SZ - 4);
	243	} else if (data[0] == 0x04 && (data[1] & 0xfe) == 0xba) {
	244	gspca_frame_add(gspca_dev, INTER_PACKET,
	245	data + 4, SD_PKT_SZ - 4);
	246	} else {
	247	gspca_dev->last_packet_type = DISCARD_PACKET;
	248	continue;
	249	}
	250	data = (u8 *) urb->transfer_buffer
	251	+ urb->iso_frame_desc[i].offset;
	252	gspca_frame_add(gspca_dev, INTER_PACKET,
	253	data, SD_PKT_SZ);
	254	}
	255
	256	/* resubmit the URBs */
	257	st = usb_submit_urb(urb0, GFP_ATOMIC);
	258	if (st < 0)
8dbf3e7c	259	err("usb_submit_urb(0) ret %d", st);
0a71d9ce JFM	260	st = usb_submit_urb(urb, GFP_ATOMIC);
0a71d9ce JFM	261	if (st < 0)
8dbf3e7c	262	err("usb_submit_urb() ret %d", st);
0a71d9ce JFM	263	}
	264
	265	/* sub-driver description */
	266	static const struct sd_desc sd_desc = {
	267	.name = MODULE_NAME,
	268	.ctrls = sd_ctrls,
	269	.nctrls = ARRAY_SIZE(sd_ctrls),
	270	.config = sd_config,
	271	.init = sd_init,
	272	.isoc_init = sd_isoc_init,
	273	.start = sd_start,
	274	.stopN = sd_stopN,
	275	.pkt_scan = sd_pkt_scan,
	276	};
	277
	278	/* -- module initialisation -- */
	279	static const __devinitdata struct usb_device_id device_table[] = {
	280	{USB_DEVICE(0x04a5, 0x3035)},
	281	{}
	282	};
	283	MODULE_DEVICE_TABLE(usb, device_table);
	284
	285	/* -- device connect -- */
	286	static int sd_probe(struct usb_interface *intf,
	287	const struct usb_device_id *id)
	288	{
	289	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	290	THIS_MODULE);
	291	}
	292
	293	static struct usb_driver sd_driver = {
	294	.name = MODULE_NAME,
	295	.id_table = device_table,
	296	.probe = sd_probe,
	297	.disconnect = gspca_disconnect,
	298	#ifdef CONFIG_PM
	299	.suspend = gspca_suspend,
	300	.resume = gspca_resume,
	301	#endif
	302	};
	303
	304	/* -- module insert / remove -- */
	305	static int __init sd_mod_init(void)
	306	{
8129888a	307	return usb_register(&sd_driver);
0a71d9ce JFM	308	}
	309	static void __exit sd_mod_exit(void)
	310	{
	311	usb_deregister(&sd_driver);
0a71d9ce JFM	312	}
	313
	314	module_init(sd_mod_init);
	315	module_exit(sd_mod_exit);