[deliverable/linux.git] / drivers / media / usb / gspca / finepix.c

/*
 * Fujifilm Finepix subdriver
 *
 * Copyright (C) 2008 Frank Zago
 *
 * 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "finepix"

#include "gspca.h"

MODULE_AUTHOR("Frank Zago <frank@zago.net>");
MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver");
MODULE_LICENSE("GPL");

/* Default timeout, in ms */
#define FPIX_TIMEOUT 250

/* Maximum transfer size to use. The windows driver reads by chunks of
 * 0x2000 bytes, so do the same. Note: reading more seems to work
 * too. */
#define FPIX_MAX_TRANSFER 0x2000

/* Structure to hold all of our device specific stuff */
struct usb_fpix {
	struct gspca_dev gspca_dev;	/* !! must be the first item */

	struct work_struct work_struct;
};

/* Delay after which claim the next frame. If the delay is too small,
 * the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
 * will fail every 4 or 5 frames, but 30ms is perfect. On the A210,
 * 30ms is bad while 35ms is perfect. */
#define NEXT_FRAME_DELAY 35

/* These cameras only support 320x200. */
static const struct v4l2_pix_format fpix_mode[1] = {
	{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 3 / 8 + 590,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0}
};

/* send a command to the webcam */
static int command(struct gspca_dev *gspca_dev,
		int order)	/* 0: reset, 1: frame request */
{
	static u8 order_values[2][12] = {
		{0xc6, 0, 0, 0, 0, 0, 0,    0, 0x20, 0, 0, 0},	/* reset */
		{0xd3, 0, 0, 0, 0, 0, 0, 0x01,    0, 0, 0, 0},	/* fr req */
	};

	memcpy(gspca_dev->usb_buf, order_values[order], 12);
	return usb_control_msg(gspca_dev->dev,
			usb_sndctrlpipe(gspca_dev->dev, 0),
			USB_REQ_GET_STATUS,
			USB_DIR_OUT | USB_TYPE_CLASS |
			USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
			12, FPIX_TIMEOUT);
}

/*
 * This function is called as a workqueue function and runs whenever the camera
 * is streaming data. Because it is a workqueue function it is allowed to sleep
 * so we can use synchronous USB calls. To avoid possible collisions with other
 * threads attempting to use gspca_dev->usb_buf we take the usb_lock when
 * performing USB operations using it. In practice we don't really need this
 * as the camera doesn't provide any controls.
 */
static void dostream(struct work_struct *work)
{
	struct usb_fpix *dev = container_of(work, struct usb_fpix, work_struct);
	struct gspca_dev *gspca_dev = &dev->gspca_dev;
	struct urb *urb = gspca_dev->urb[0];
	u8 *data = urb->transfer_buffer;
	int ret = 0;
	int len;

	PDEBUG(D_STREAM, "dostream started");

	/* loop reading a frame */
again:
	while (gspca_dev->present && gspca_dev->streaming) {
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			break;
#endif

		/* request a frame */
		mutex_lock(&gspca_dev->usb_lock);
		ret = command(gspca_dev, 1);
		mutex_unlock(&gspca_dev->usb_lock);
		if (ret < 0)
			break;
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			break;
#endif
		if (!gspca_dev->present || !gspca_dev->streaming)
			break;

		/* the frame comes in parts */
		for (;;) {
			ret = usb_bulk_msg(gspca_dev->dev,
					urb->pipe,
					data,
					FPIX_MAX_TRANSFER,
					&len, FPIX_TIMEOUT);
			if (ret < 0) {
				/* Most of the time we get a timeout
				 * error. Just restart. */
				goto again;
			}
#ifdef CONFIG_PM
			if (gspca_dev->frozen)
				goto out;
#endif
			if (!gspca_dev->present || !gspca_dev->streaming)
				goto out;
			if (len < FPIX_MAX_TRANSFER ||
				(data[len - 2] == 0xff &&
					data[len - 1] == 0xd9)) {

				/* If the result is less than what was asked
				 * for, then it's the end of the
				 * frame. Sometimes the jpeg is not complete,
				 * but there's nothing we can do. We also end
				 * here if the the jpeg ends right at the end
				 * of the frame. */
				gspca_frame_add(gspca_dev, LAST_PACKET,
						data, len);
				break;
			}

			/* got a partial image */
			gspca_frame_add(gspca_dev,
					gspca_dev->last_packet_type
						== LAST_PACKET
					? FIRST_PACKET : INTER_PACKET,
					data, len);
		}

		/* We must wait before trying reading the next
		 * frame. If we don't, or if the delay is too short,
		 * the camera will disconnect. */
		msleep(NEXT_FRAME_DELAY);
	}

out:
	PDEBUG(D_STREAM, "dostream stopped");
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
		const struct usb_device_id *id)
{
	struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
	struct cam *cam = &gspca_dev->cam;

	cam->cam_mode = fpix_mode;
	cam->nmodes = 1;
	cam->bulk = 1;
	cam->bulk_size = FPIX_MAX_TRANSFER;

	INIT_WORK(&dev->work_struct, dostream);

	return 0;
}

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

/* start the camera */
static int sd_start(struct gspca_dev *gspca_dev)
{
	struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
	int ret, len;

	/* Init the device */
	ret = command(gspca_dev, 0);
	if (ret < 0) {
		pr_err("init failed %d\n", ret);
		return ret;
	}

	/* Read the result of the command. Ignore the result, for it
	 * varies with the device. */
	ret = usb_bulk_msg(gspca_dev->dev,
			gspca_dev->urb[0]->pipe,
			gspca_dev->urb[0]->transfer_buffer,
			FPIX_MAX_TRANSFER, &len,
			FPIX_TIMEOUT);
	if (ret < 0) {
		pr_err("usb_bulk_msg failed %d\n", ret);
		return ret;
	}

	/* Request a frame, but don't read it */
	ret = command(gspca_dev, 1);
	if (ret < 0) {
		pr_err("frame request failed %d\n", ret);
		return ret;
	}

	/* Again, reset bulk in endpoint */
	usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe);

	schedule_work(&dev->work_struct);

	return 0;
}

/* called on streamoff with alt==0 and on disconnect */
/* the usb_lock is held at entry - restore on exit */
static void sd_stop0(struct gspca_dev *gspca_dev)
{
	struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;

	/* wait for the work queue to terminate */
	mutex_unlock(&gspca_dev->usb_lock);
	flush_work(&dev->work_struct);
	mutex_lock(&gspca_dev->usb_lock);
}

/* Table of supported USB devices */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x04cb, 0x0104)},
	{USB_DEVICE(0x04cb, 0x0109)},
	{USB_DEVICE(0x04cb, 0x010b)},
	{USB_DEVICE(0x04cb, 0x010f)},
	{USB_DEVICE(0x04cb, 0x0111)},
	{USB_DEVICE(0x04cb, 0x0113)},
	{USB_DEVICE(0x04cb, 0x0115)},
	{USB_DEVICE(0x04cb, 0x0117)},
	{USB_DEVICE(0x04cb, 0x0119)},
	{USB_DEVICE(0x04cb, 0x011b)},
	{USB_DEVICE(0x04cb, 0x011d)},
	{USB_DEVICE(0x04cb, 0x0121)},
	{USB_DEVICE(0x04cb, 0x0123)},
	{USB_DEVICE(0x04cb, 0x0125)},
	{USB_DEVICE(0x04cb, 0x0127)},
	{USB_DEVICE(0x04cb, 0x0129)},
	{USB_DEVICE(0x04cb, 0x012b)},
	{USB_DEVICE(0x04cb, 0x012d)},
	{USB_DEVICE(0x04cb, 0x012f)},
	{USB_DEVICE(0x04cb, 0x0131)},
	{USB_DEVICE(0x04cb, 0x013b)},
	{USB_DEVICE(0x04cb, 0x013d)},
	{USB_DEVICE(0x04cb, 0x013f)},
	{}
};

MODULE_DEVICE_TABLE(usb, device_table);

/* sub-driver description */
static const struct sd_desc sd_desc = {
	.name   = MODULE_NAME,
	.config = sd_config,
	.init   = sd_init,
	.start  = sd_start,
	.stop0  = sd_stop0,
};

/* -- 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 usb_fpix),
			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,
	.reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);
Commit	Line	Data
97076859 FZ	1	/*
	2	* Fujifilm Finepix subdriver
	3	*
	4	* Copyright (C) 2008 Frank Zago
	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
70a42995 JP	21	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
70a42995 JP	22
97076859 FZ	23	#define MODULE_NAME "finepix"
	24
	25	#include "gspca.h"
	26
	27	MODULE_AUTHOR("Frank Zago <frank@zago.net>");
	28	MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver");
	29	MODULE_LICENSE("GPL");
	30
	31	/* Default timeout, in ms */
c0c4c893	32	#define FPIX_TIMEOUT 250
97076859 FZ	33
	34	/* Maximum transfer size to use. The windows driver reads by chunks of
	35	* 0x2000 bytes, so do the same. Note: reading more seems to work
	36	* too. */
	37	#define FPIX_MAX_TRANSFER 0x2000
	38
	39	/* Structure to hold all of our device specific stuff */
	40	struct usb_fpix {
	41	struct gspca_dev gspca_dev; /* !! must be the first item */
	42
c0c4c893	43	struct work_struct work_struct;
97076859 FZ	44	};
	45
	46	/* Delay after which claim the next frame. If the delay is too small,
	47	* the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
c0c4c893 JFM	48	* will fail every 4 or 5 frames, but 30ms is perfect. On the A210,
	49	* 30ms is bad while 35ms is perfect. */
	50	#define NEXT_FRAME_DELAY 35
97076859 FZ	51
97076859 FZ	52	/* These cameras only support 320x200. */
cc611b8a	53	static const struct v4l2_pix_format fpix_mode[1] = {
97076859 FZ	54	{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
	55	.bytesperline = 320,
	56	.sizeimage = 320 * 240 * 3 / 8 + 590,
	57	.colorspace = V4L2_COLORSPACE_SRGB,
	58	.priv = 0}
	59	};
	60
c0c4c893 JFM	61	/* send a command to the webcam */
	62	static int command(struct gspca_dev *gspca_dev,
	63	int order) /* 0: reset, 1: frame request */
97076859	64	{
c0c4c893 JFM	65	static u8 order_values[2][12] = {
	66	{0xc6, 0, 0, 0, 0, 0, 0, 0, 0x20, 0, 0, 0}, /* reset */
	67	{0xd3, 0, 0, 0, 0, 0, 0, 0x01, 0, 0, 0, 0}, /* fr req */
	68	};
97076859	69
c0c4c893 JFM	70	memcpy(gspca_dev->usb_buf, order_values[order], 12);
	71	return usb_control_msg(gspca_dev->dev,
	72	usb_sndctrlpipe(gspca_dev->dev, 0),
	73	USB_REQ_GET_STATUS,
	74	USB_DIR_OUT \| USB_TYPE_CLASS \|
	75	USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
	76	12, FPIX_TIMEOUT);
97076859 FZ	77	}
97076859 FZ	78
844db450 HG	79	/*
	80	* This function is called as a workqueue function and runs whenever the camera
	81	* is streaming data. Because it is a workqueue function it is allowed to sleep
	82	* so we can use synchronous USB calls. To avoid possible collisions with other
	83	* threads attempting to use gspca_dev->usb_buf we take the usb_lock when
	84	* performing USB operations using it. In practice we don't really need this
	85	* as the camera doesn't provide any controls.
	86	*/
c0c4c893	87	static void dostream(struct work_struct *work)
97076859	88	{
c0c4c893 JFM	89	struct usb_fpix *dev = container_of(work, struct usb_fpix, work_struct);
	90	struct gspca_dev *gspca_dev = &dev->gspca_dev;
	91	struct urb *urb = gspca_dev->urb[0];
	92	u8 *data = urb->transfer_buffer;
c0c4c893 JFM	93	int ret = 0;
	94	int len;
	95
c0c4c893 JFM	96	PDEBUG(D_STREAM, "dostream started");
	97
	98	/* loop reading a frame */
	99	again:
345321dc	100	while (gspca_dev->present && gspca_dev->streaming) {
4ad34da0 HV	101	#ifdef CONFIG_PM
	102	if (gspca_dev->frozen)
	103	break;
	104	#endif
c0c4c893 JFM	105
	106	/* request a frame */
	107	mutex_lock(&gspca_dev->usb_lock);
	108	ret = command(gspca_dev, 1);
	109	mutex_unlock(&gspca_dev->usb_lock);
	110	if (ret < 0)
	111	break;
4ad34da0 HV	112	#ifdef CONFIG_PM
	113	if (gspca_dev->frozen)
	114	break;
	115	#endif
345321dc	116	if (!gspca_dev->present \|\| !gspca_dev->streaming)
c0c4c893 JFM	117	break;
	118
	119	/* the frame comes in parts */
	120	for (;;) {
	121	ret = usb_bulk_msg(gspca_dev->dev,
	122	urb->pipe,
	123	data,
	124	FPIX_MAX_TRANSFER,
	125	&len, FPIX_TIMEOUT);
	126	if (ret < 0) {
	127	/* Most of the time we get a timeout
	128	* error. Just restart. */
	129	goto again;
	130	}
4ad34da0 HV	131	#ifdef CONFIG_PM
	132	if (gspca_dev->frozen)
	133	goto out;
	134	#endif
345321dc	135	if (!gspca_dev->present \|\| !gspca_dev->streaming)
c0c4c893	136	goto out;
c0c4c893 JFM	137	if (len < FPIX_MAX_TRANSFER \|\|
	138	(data[len - 2] == 0xff &&
	139	data[len - 1] == 0xd9)) {
	140
	141	/* If the result is less than what was asked
	142	* for, then it's the end of the
	143	* frame. Sometimes the jpeg is not complete,
	144	* but there's nothing we can do. We also end
	145	* here if the the jpeg ends right at the end
	146	* of the frame. */
76dd272b JFM	147	gspca_frame_add(gspca_dev, LAST_PACKET,
76dd272b JFM	148	data, len);
c0c4c893 JFM	149	break;
c0c4c893 JFM	150	}
97076859 FZ	151
97076859 FZ	152	/* got a partial image */
76dd272b JFM	153	gspca_frame_add(gspca_dev,
	154	gspca_dev->last_packet_type
	155	== LAST_PACKET
	156	? FIRST_PACKET : INTER_PACKET,
	157	data, len);
97076859	158	}
97076859	159
c0c4c893 JFM	160	/* We must wait before trying reading the next
	161	* frame. If we don't, or if the delay is too short,
	162	* the camera will disconnect. */
	163	msleep(NEXT_FRAME_DELAY);
97076859	164	}
97076859	165
c0c4c893 JFM	166	out:
c0c4c893 JFM	167	PDEBUG(D_STREAM, "dostream stopped");
97076859 FZ	168	}
	169
	170	/* this function is called at probe time */
	171	static int sd_config(struct gspca_dev *gspca_dev,
	172	const struct usb_device_id *id)
	173	{
c0c4c893	174	struct usb_fpix dev = (struct usb_fpix ) gspca_dev;
97076859 FZ	175	struct cam *cam = &gspca_dev->cam;
	176
	177	cam->cam_mode = fpix_mode;
	178	cam->nmodes = 1;
6929dc6b	179	cam->bulk = 1;
97076859 FZ	180	cam->bulk_size = FPIX_MAX_TRANSFER;
97076859 FZ	181
c0c4c893	182	INIT_WORK(&dev->work_struct, dostream);
97076859	183
c0c4c893	184	return 0;
97076859 FZ	185	}
	186
	187	/* this function is called at probe and resume time */
	188	static int sd_init(struct gspca_dev *gspca_dev)
	189	{
97076859 FZ	190	return 0;
	191	}
	192
c0c4c893	193	/* start the camera */
97076859 FZ	194	static int sd_start(struct gspca_dev *gspca_dev)
	195	{
	196	struct usb_fpix dev = (struct usb_fpix ) gspca_dev;
c0c4c893	197	int ret, len;
97076859	198
97076859	199	/* Init the device */
c0c4c893 JFM	200	ret = command(gspca_dev, 0);
c0c4c893 JFM	201	if (ret < 0) {
70a42995	202	pr_err("init failed %d\n", ret);
c0c4c893	203	return ret;
97076859 FZ	204	}
	205
	206	/* Read the result of the command. Ignore the result, for it
	207	* varies with the device. */
	208	ret = usb_bulk_msg(gspca_dev->dev,
50e06dee	209	gspca_dev->urb[0]->pipe,
c0c4c893 JFM	210	gspca_dev->urb[0]->transfer_buffer,
c0c4c893 JFM	211	FPIX_MAX_TRANSFER, &len,
97076859	212	FPIX_TIMEOUT);
c0c4c893	213	if (ret < 0) {
70a42995	214	pr_err("usb_bulk_msg failed %d\n", ret);
c0c4c893	215	return ret;
97076859 FZ	216	}
	217
	218	/* Request a frame, but don't read it */
c0c4c893 JFM	219	ret = command(gspca_dev, 1);
c0c4c893 JFM	220	if (ret < 0) {
70a42995	221	pr_err("frame request failed %d\n", ret);
c0c4c893	222	return ret;
97076859 FZ	223	}
	224
	225	/* Again, reset bulk in endpoint */
50e06dee	226	usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe);
97076859	227
53eebd84	228	schedule_work(&dev->work_struct);
97076859 FZ	229
97076859 FZ	230	return 0;
c0c4c893 JFM	231	}
	232
	233	/* called on streamoff with alt==0 and on disconnect */
	234	/* the usb_lock is held at entry - restore on exit */
	235	static void sd_stop0(struct gspca_dev *gspca_dev)
	236	{
	237	struct usb_fpix dev = (struct usb_fpix ) gspca_dev;
97076859	238
c0c4c893 JFM	239	/* wait for the work queue to terminate */
c0c4c893 JFM	240	mutex_unlock(&gspca_dev->usb_lock);
53eebd84	241	flush_work(&dev->work_struct);
c0c4c893	242	mutex_lock(&gspca_dev->usb_lock);
97076859 FZ	243	}
	244
	245	/* Table of supported USB devices */
95c967c1	246	static const struct usb_device_id device_table[] = {
97076859 FZ	247	{USB_DEVICE(0x04cb, 0x0104)},
	248	{USB_DEVICE(0x04cb, 0x0109)},
	249	{USB_DEVICE(0x04cb, 0x010b)},
	250	{USB_DEVICE(0x04cb, 0x010f)},
	251	{USB_DEVICE(0x04cb, 0x0111)},
	252	{USB_DEVICE(0x04cb, 0x0113)},
	253	{USB_DEVICE(0x04cb, 0x0115)},
	254	{USB_DEVICE(0x04cb, 0x0117)},
	255	{USB_DEVICE(0x04cb, 0x0119)},
	256	{USB_DEVICE(0x04cb, 0x011b)},
	257	{USB_DEVICE(0x04cb, 0x011d)},
	258	{USB_DEVICE(0x04cb, 0x0121)},
	259	{USB_DEVICE(0x04cb, 0x0123)},
	260	{USB_DEVICE(0x04cb, 0x0125)},
	261	{USB_DEVICE(0x04cb, 0x0127)},
	262	{USB_DEVICE(0x04cb, 0x0129)},
	263	{USB_DEVICE(0x04cb, 0x012b)},
	264	{USB_DEVICE(0x04cb, 0x012d)},
	265	{USB_DEVICE(0x04cb, 0x012f)},
	266	{USB_DEVICE(0x04cb, 0x0131)},
	267	{USB_DEVICE(0x04cb, 0x013b)},
	268	{USB_DEVICE(0x04cb, 0x013d)},
	269	{USB_DEVICE(0x04cb, 0x013f)},
	270	{}
	271	};
	272
	273	MODULE_DEVICE_TABLE(usb, device_table);
	274
	275	/* sub-driver description */
	276	static const struct sd_desc sd_desc = {
c0c4c893	277	.name = MODULE_NAME,
97076859	278	.config = sd_config,
c0c4c893 JFM	279	.init = sd_init,
	280	.start = sd_start,
	281	.stop0 = sd_stop0,
97076859 FZ	282	};
	283
	284	/* -- device connect -- */
	285	static int sd_probe(struct usb_interface *intf,
	286	const struct usb_device_id *id)
	287	{
	288	return gspca_dev_probe(intf, id,
	289	&sd_desc,
	290	sizeof(struct usb_fpix),
	291	THIS_MODULE);
	292	}
	293
	294	static struct usb_driver sd_driver = {
c0c4c893 JFM	295	.name = MODULE_NAME,
	296	.id_table = device_table,
	297	.probe = sd_probe,
97076859 FZ	298	.disconnect = gspca_disconnect,
	299	#ifdef CONFIG_PM
	300	.suspend = gspca_suspend,
c0c4c893	301	.resume = gspca_resume,
8bb58964	302	.reset_resume = gspca_resume,
97076859 FZ	303	#endif
	304	};
	305
ecb3b2b3	306	module_usb_driver(sd_driver);