[mirror_ubuntu-zesty-kernel.git] / drivers / media / usb / gspca / vicam.c

/*
 * gspca ViCam subdriver
 *
 * Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com>
 *
 * Based on the usbvideo vicam driver, which is:
 *
 * Copyright (c) 2002 Joe Burks (jburks@wavicle.org),
 *                    Chris Cheney (chris.cheney@gmail.com),
 *                    Pavel Machek (pavel@ucw.cz),
 *                    John Tyner (jtyner@cs.ucr.edu),
 *                    Monroe Williams (monroe@pobox.com)
 *
 * 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 "vicam"
#define HEADER_SIZE 64

#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/ihex.h>
#include "gspca.h"

#define VICAM_FIRMWARE "vicam/firmware.fw"

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("GSPCA ViCam USB Camera Driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(VICAM_FIRMWARE);

struct sd {
	struct gspca_dev gspca_dev;	/* !! must be the first item */
	struct work_struct work_struct;
	struct workqueue_struct *work_thread;
};

/* The vicam sensor has a resolution of 512 x 244, with I believe square
   pixels, but this is forced to a 4:3 ratio by optics. So it has
   non square pixels :( */
static struct v4l2_pix_format vicam_mode[] = {
	{ 256, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
		.bytesperline = 256,
		.sizeimage = 256 * 122,
		.colorspace = V4L2_COLORSPACE_SRGB,},
	/* 2 modes with somewhat more square pixels */
	{ 256, 200, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
		.bytesperline = 256,
		.sizeimage = 256 * 200,
		.colorspace = V4L2_COLORSPACE_SRGB,},
	{ 256, 240, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
		.bytesperline = 256,
		.sizeimage = 256 * 240,
		.colorspace = V4L2_COLORSPACE_SRGB,},
#if 0   /* This mode has extremely non square pixels, testing use only */
	{ 512, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
		.bytesperline = 512,
		.sizeimage = 512 * 122,
		.colorspace = V4L2_COLORSPACE_SRGB,},
#endif
	{ 512, 244, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
		.bytesperline = 512,
		.sizeimage = 512 * 244,
		.colorspace = V4L2_COLORSPACE_SRGB,},
};

static int vicam_control_msg(struct gspca_dev *gspca_dev, u8 request,
	u16 value, u16 index, u8 *data, u16 len)
{
	int ret;

	ret = usb_control_msg(gspca_dev->dev,
			      usb_sndctrlpipe(gspca_dev->dev, 0),
			      request,
			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			      value, index, data, len, 1000);
	if (ret < 0)
		pr_err("control msg req %02X error %d\n", request, ret);

	return ret;
}

static int vicam_set_camera_power(struct gspca_dev *gspca_dev, int state)
{
	int ret;

	ret = vicam_control_msg(gspca_dev, 0x50, state, 0, NULL, 0);
	if (ret < 0)
		return ret;

	if (state)
		ret = vicam_control_msg(gspca_dev, 0x55, 1, 0, NULL, 0);

	return ret;
}

/*
 *  request and read a block of data
 */
static int vicam_read_frame(struct gspca_dev *gspca_dev, u8 *data, int size)
{
	int ret, unscaled_height, act_len = 0;
	u8 *req_data = gspca_dev->usb_buf;
	s32 expo = v4l2_ctrl_g_ctrl(gspca_dev->exposure);
	s32 gain = v4l2_ctrl_g_ctrl(gspca_dev->gain);

	memset(req_data, 0, 16);
	req_data[0] = gain;
	if (gspca_dev->width == 256)
		req_data[1] |= 0x01; /* low nibble x-scale */
	if (gspca_dev->height <= 122) {
		req_data[1] |= 0x10; /* high nibble y-scale */
		unscaled_height = gspca_dev->height * 2;
	} else
		unscaled_height = gspca_dev->height;
	req_data[2] = 0x90; /* unknown, does not seem to do anything */
	if (unscaled_height <= 200)
		req_data[3] = 0x06; /* vend? */
	else if (unscaled_height <= 242) /* Yes 242 not 240 */
		req_data[3] = 0x07; /* vend? */
	else /* Up to 244 lines with req_data[3] == 0x08 */
		req_data[3] = 0x08; /* vend? */

	if (expo < 256) {
		/* Frame rate maxed out, use partial frame expo time */
		req_data[4] = 255 - expo;
		req_data[5] = 0x00;
		req_data[6] = 0x00;
		req_data[7] = 0x01;
	} else {
		/* Modify frame rate */
		req_data[4] = 0x00;
		req_data[5] = 0x00;
		req_data[6] = expo & 0xFF;
		req_data[7] = expo >> 8;
	}
	req_data[8] = ((244 - unscaled_height) / 2) & ~0x01; /* vstart */
	/* bytes 9-15 do not seem to affect exposure or image quality */

	mutex_lock(&gspca_dev->usb_lock);
	ret = vicam_control_msg(gspca_dev, 0x51, 0x80, 0, req_data, 16);
	mutex_unlock(&gspca_dev->usb_lock);
	if (ret < 0)
		return ret;

	ret = usb_bulk_msg(gspca_dev->dev,
			   usb_rcvbulkpipe(gspca_dev->dev, 0x81),
			   data, size, &act_len, 10000);
	/* successful, it returns 0, otherwise  negative */
	if (ret < 0 || act_len != size) {
		pr_err("bulk read fail (%d) len %d/%d\n",
		       ret, act_len, size);
		return -EIO;
	}
	return 0;
}

/*
 * 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 cameras controls are only written from the workqueue.
 */
static void vicam_dostream(struct work_struct *work)
{
	struct sd *sd = container_of(work, struct sd, work_struct);
	struct gspca_dev *gspca_dev = &sd->gspca_dev;
	int ret, frame_sz;
	u8 *buffer;

	frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage +
		   HEADER_SIZE;
	buffer = kmalloc(frame_sz, GFP_KERNEL | GFP_DMA);
	if (!buffer) {
		pr_err("Couldn't allocate USB buffer\n");
		goto exit;
	}

	while (gspca_dev->present && gspca_dev->streaming) {
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			break;
#endif
		ret = vicam_read_frame(gspca_dev, buffer, frame_sz);
		if (ret < 0)
			break;

		/* Note the frame header contents seem to be completely
		   constant, they do not change with either image, or
		   settings. So we simply discard it. The frames have
		   a very similar 64 byte footer, which we don't even
		   bother reading from the cam */
		gspca_frame_add(gspca_dev, FIRST_PACKET,
				buffer + HEADER_SIZE,
				frame_sz - HEADER_SIZE);
		gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
	}
exit:
	kfree(buffer);
}

/* This function is called at probe time just before sd_init */
static int sd_config(struct gspca_dev *gspca_dev,
		const struct usb_device_id *id)
{
	struct cam *cam = &gspca_dev->cam;
	struct sd *sd = (struct sd *)gspca_dev;

	/* We don't use the buffer gspca allocates so make it small. */
	cam->bulk = 1;
	cam->bulk_size = 64;
	cam->cam_mode = vicam_mode;
	cam->nmodes = ARRAY_SIZE(vicam_mode);

	INIT_WORK(&sd->work_struct, vicam_dostream);

	return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
	int ret;
	const struct ihex_binrec *rec;
	const struct firmware *uninitialized_var(fw);
	u8 *firmware_buf;

	ret = request_ihex_firmware(&fw, VICAM_FIRMWARE,
				    &gspca_dev->dev->dev);
	if (ret) {
		pr_err("Failed to load \"vicam/firmware.fw\": %d\n", ret);
		return ret;
	}

	firmware_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!firmware_buf) {
		ret = -ENOMEM;
		goto exit;
	}
	for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {
		memcpy(firmware_buf, rec->data, be16_to_cpu(rec->len));
		ret = vicam_control_msg(gspca_dev, 0xff, 0, 0, firmware_buf,
					be16_to_cpu(rec->len));
		if (ret < 0)
			break;
	}

	kfree(firmware_buf);
exit:
	release_firmware(fw);
	return ret;
}

/* Set up for getting frames. */
static int sd_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *)gspca_dev;
	int ret;

	ret = vicam_set_camera_power(gspca_dev, 1);
	if (ret < 0)
		return ret;

	/* Start the workqueue function to do the streaming */
	sd->work_thread = create_singlethread_workqueue(MODULE_NAME);
	queue_work(sd->work_thread, &sd->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 sd *dev = (struct sd *)gspca_dev;

	/* wait for the work queue to terminate */
	mutex_unlock(&gspca_dev->usb_lock);
	/* This waits for vicam_dostream to finish */
	destroy_workqueue(dev->work_thread);
	dev->work_thread = NULL;
	mutex_lock(&gspca_dev->usb_lock);

	if (gspca_dev->present)
		vicam_set_camera_power(gspca_dev, 0);
}

static int sd_init_controls(struct gspca_dev *gspca_dev)
{
	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;

	gspca_dev->vdev.ctrl_handler = hdl;
	v4l2_ctrl_handler_init(hdl, 2);
	gspca_dev->exposure = v4l2_ctrl_new_std(hdl, NULL,
			V4L2_CID_EXPOSURE, 0, 2047, 1, 256);
	gspca_dev->gain = v4l2_ctrl_new_std(hdl, NULL,
			V4L2_CID_GAIN, 0, 255, 1, 200);

	if (hdl->error) {
		pr_err("Could not initialize controls\n");
		return hdl->error;
	}
	return 0;
}

/* Table of supported USB devices */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x04c1, 0x009d)},
	{USB_DEVICE(0x0602, 0x1001)},
	{}
};

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,
	.init_controls = sd_init_controls,
	.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 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,
	.reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);
Commit	Line	Data
49b61ec9 HG	1	/*
	2	* gspca ViCam subdriver
	3	*
	4	* Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com>
	5	*
	6	* Based on the usbvideo vicam driver, which is:
	7	*
	8	* Copyright (c) 2002 Joe Burks (jburks@wavicle.org),
ccb7cc00	9	* Chris Cheney (chris.cheney@gmail.com),
49b61ec9 HG	10	* Pavel Machek (pavel@ucw.cz),
	11	* John Tyner (jtyner@cs.ucr.edu),
	12	* Monroe Williams (monroe@pobox.com)
	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License as published by
	16	* the Free Software Foundation; either version 2 of the License, or
	17	* any later version.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	27	*/
	28
133a9fe9 JP	29	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
133a9fe9 JP	30
49b61ec9 HG	31	#define MODULE_NAME "vicam"
	32	#define HEADER_SIZE 64
	33
	34	#include <linux/workqueue.h>
	35	#include <linux/slab.h>
	36	#include <linux/firmware.h>
	37	#include <linux/ihex.h>
	38	#include "gspca.h"
	39
d74185b4 TG	40	#define VICAM_FIRMWARE "vicam/firmware.fw"
d74185b4 TG	41
49b61ec9 HG	42	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	43	MODULE_DESCRIPTION("GSPCA ViCam USB Camera Driver");
	44	MODULE_LICENSE("GPL");
d74185b4	45	MODULE_FIRMWARE(VICAM_FIRMWARE);
49b61ec9	46
49b61ec9 HG	47	struct sd {
	48	struct gspca_dev gspca_dev; /* !! must be the first item */
	49	struct work_struct work_struct;
	50	struct workqueue_struct *work_thread;
49b61ec9 HG	51	};
	52
	53	/* The vicam sensor has a resolution of 512 x 244, with I believe square
	54	pixels, but this is forced to a 4:3 ratio by optics. So it has
	55	non square pixels :( */
	56	static struct v4l2_pix_format vicam_mode[] = {
	57	{ 256, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
	58	.bytesperline = 256,
	59	.sizeimage = 256 * 122,
	60	.colorspace = V4L2_COLORSPACE_SRGB,},
	61	/* 2 modes with somewhat more square pixels */
	62	{ 256, 200, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
	63	.bytesperline = 256,
	64	.sizeimage = 256 * 200,
	65	.colorspace = V4L2_COLORSPACE_SRGB,},
	66	{ 256, 240, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
	67	.bytesperline = 256,
	68	.sizeimage = 256 * 240,
	69	.colorspace = V4L2_COLORSPACE_SRGB,},
	70	#if 0 /* This mode has extremely non square pixels, testing use only */
	71	{ 512, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
	72	.bytesperline = 512,
	73	.sizeimage = 512 * 122,
	74	.colorspace = V4L2_COLORSPACE_SRGB,},
	75	#endif
	76	{ 512, 244, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
	77	.bytesperline = 512,
	78	.sizeimage = 512 * 244,
	79	.colorspace = V4L2_COLORSPACE_SRGB,},
	80	};
	81
49b61ec9 HG	82	static int vicam_control_msg(struct gspca_dev *gspca_dev, u8 request,
	83	u16 value, u16 index, u8 *data, u16 len)
	84	{
	85	int ret;
	86
	87	ret = usb_control_msg(gspca_dev->dev,
	88	usb_sndctrlpipe(gspca_dev->dev, 0),
	89	request,
	90	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	91	value, index, data, len, 1000);
	92	if (ret < 0)
133a9fe9	93	pr_err("control msg req %02X error %d\n", request, ret);
49b61ec9 HG	94
	95	return ret;
	96	}
	97
	98	static int vicam_set_camera_power(struct gspca_dev *gspca_dev, int state)
	99	{
	100	int ret;
	101
	102	ret = vicam_control_msg(gspca_dev, 0x50, state, 0, NULL, 0);
	103	if (ret < 0)
	104	return ret;
	105
	106	if (state)
	107	ret = vicam_control_msg(gspca_dev, 0x55, 1, 0, NULL, 0);
	108
	109	return ret;
	110	}
	111
	112	/*
844db450	113	* request and read a block of data
49b61ec9 HG	114	*/
	115	static int vicam_read_frame(struct gspca_dev gspca_dev, u8 data, int size)
	116	{
49b61ec9 HG	117	int ret, unscaled_height, act_len = 0;
49b61ec9 HG	118	u8 *req_data = gspca_dev->usb_buf;
4910adf1 HV	119	s32 expo = v4l2_ctrl_g_ctrl(gspca_dev->exposure);
4910adf1 HV	120	s32 gain = v4l2_ctrl_g_ctrl(gspca_dev->gain);
49b61ec9 HG	121
49b61ec9 HG	122	memset(req_data, 0, 16);
4910adf1	123	req_data[0] = gain;
49b61ec9 HG	124	if (gspca_dev->width == 256)
	125	req_data[1] \|= 0x01; /* low nibble x-scale */
	126	if (gspca_dev->height <= 122) {
	127	req_data[1] \|= 0x10; /* high nibble y-scale */
	128	unscaled_height = gspca_dev->height * 2;
	129	} else
	130	unscaled_height = gspca_dev->height;
	131	req_data[2] = 0x90; /* unknown, does not seem to do anything */
	132	if (unscaled_height <= 200)
	133	req_data[3] = 0x06; /* vend? */
	134	else if (unscaled_height <= 242) /* Yes 242 not 240 */
	135	req_data[3] = 0x07; /* vend? */
	136	else /* Up to 244 lines with req_data[3] == 0x08 */
	137	req_data[3] = 0x08; /* vend? */
	138
4910adf1	139	if (expo < 256) {
49b61ec9	140	/* Frame rate maxed out, use partial frame expo time */
4910adf1	141	req_data[4] = 255 - expo;
49b61ec9 HG	142	req_data[5] = 0x00;
	143	req_data[6] = 0x00;
	144	req_data[7] = 0x01;
	145	} else {
	146	/* Modify frame rate */
	147	req_data[4] = 0x00;
	148	req_data[5] = 0x00;
4910adf1 HV	149	req_data[6] = expo & 0xFF;
4910adf1 HV	150	req_data[7] = expo >> 8;
49b61ec9 HG	151	}
	152	req_data[8] = ((244 - unscaled_height) / 2) & ~0x01; /* vstart */
	153	/* bytes 9-15 do not seem to affect exposure or image quality */
	154
	155	mutex_lock(&gspca_dev->usb_lock);
	156	ret = vicam_control_msg(gspca_dev, 0x51, 0x80, 0, req_data, 16);
	157	mutex_unlock(&gspca_dev->usb_lock);
	158	if (ret < 0)
	159	return ret;
	160
	161	ret = usb_bulk_msg(gspca_dev->dev,
	162	usb_rcvbulkpipe(gspca_dev->dev, 0x81),
	163	data, size, &act_len, 10000);
	164	/* successful, it returns 0, otherwise negative */
	165	if (ret < 0 \|\| act_len != size) {
133a9fe9 JP	166	pr_err("bulk read fail (%d) len %d/%d\n",
133a9fe9 JP	167	ret, act_len, size);
49b61ec9 HG	168	return -EIO;
	169	}
	170	return 0;
	171	}
	172
844db450 HG	173	/*
844db450 HG	174	* This function is called as a workqueue function and runs whenever the camera
49b61ec9 HG	175	* is streaming data. Because it is a workqueue function it is allowed to sleep
49b61ec9 HG	176	* so we can use synchronous USB calls. To avoid possible collisions with other
844db450 HG	177	* threads attempting to use gspca_dev->usb_buf we take the usb_lock when
	178	* performing USB operations using it. In practice we don't really need this
	179	* as the cameras controls are only written from the workqueue.
49b61ec9 HG	180	*/
	181	static void vicam_dostream(struct work_struct *work)
	182	{
	183	struct sd *sd = container_of(work, struct sd, work_struct);
	184	struct gspca_dev *gspca_dev = &sd->gspca_dev;
	185	int ret, frame_sz;
	186	u8 *buffer;
	187
	188	frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage +
	189	HEADER_SIZE;
	190	buffer = kmalloc(frame_sz, GFP_KERNEL \| GFP_DMA);
	191	if (!buffer) {
133a9fe9	192	pr_err("Couldn't allocate USB buffer\n");
49b61ec9 HG	193	goto exit;
	194	}
	195
345321dc	196	while (gspca_dev->present && gspca_dev->streaming) {
4ad34da0 HV	197	#ifdef CONFIG_PM
	198	if (gspca_dev->frozen)
	199	break;
	200	#endif
49b61ec9 HG	201	ret = vicam_read_frame(gspca_dev, buffer, frame_sz);
	202	if (ret < 0)
	203	break;
	204
	205	/* Note the frame header contents seem to be completely
	206	constant, they do not change with either image, or
	207	settings. So we simply discard it. The frames have
	208	a very similar 64 byte footer, which we don't even
	209	bother reading from the cam */
	210	gspca_frame_add(gspca_dev, FIRST_PACKET,
	211	buffer + HEADER_SIZE,
	212	frame_sz - HEADER_SIZE);
	213	gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
	214	}
	215	exit:
	216	kfree(buffer);
	217	}
	218
	219	/* This function is called at probe time just before sd_init */
	220	static int sd_config(struct gspca_dev *gspca_dev,
	221	const struct usb_device_id *id)
	222	{
	223	struct cam *cam = &gspca_dev->cam;
	224	struct sd sd = (struct sd )gspca_dev;
	225
	226	/* We don't use the buffer gspca allocates so make it small. */
	227	cam->bulk = 1;
	228	cam->bulk_size = 64;
	229	cam->cam_mode = vicam_mode;
	230	cam->nmodes = ARRAY_SIZE(vicam_mode);
49b61ec9 HG	231
	232	INIT_WORK(&sd->work_struct, vicam_dostream);
	233
	234	return 0;
	235	}
	236
	237	/* this function is called at probe and resume time */
	238	static int sd_init(struct gspca_dev *gspca_dev)
	239	{
	240	int ret;
	241	const struct ihex_binrec *rec;
	242	const struct firmware *uninitialized_var(fw);
	243	u8 *firmware_buf;
	244
d74185b4	245	ret = request_ihex_firmware(&fw, VICAM_FIRMWARE,
49b61ec9 HG	246	&gspca_dev->dev->dev);
49b61ec9 HG	247	if (ret) {
133a9fe9	248	pr_err("Failed to load \"vicam/firmware.fw\": %d\n", ret);
49b61ec9 HG	249	return ret;
	250	}
	251
	252	firmware_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	253	if (!firmware_buf) {
	254	ret = -ENOMEM;
	255	goto exit;
	256	}
	257	for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {
	258	memcpy(firmware_buf, rec->data, be16_to_cpu(rec->len));
	259	ret = vicam_control_msg(gspca_dev, 0xff, 0, 0, firmware_buf,
	260	be16_to_cpu(rec->len));
	261	if (ret < 0)
	262	break;
	263	}
	264
	265	kfree(firmware_buf);
	266	exit:
	267	release_firmware(fw);
	268	return ret;
	269	}
	270
	271	/* Set up for getting frames. */
	272	static int sd_start(struct gspca_dev *gspca_dev)
	273	{
	274	struct sd sd = (struct sd )gspca_dev;
	275	int ret;
	276
	277	ret = vicam_set_camera_power(gspca_dev, 1);
	278	if (ret < 0)
	279	return ret;
	280
	281	/* Start the workqueue function to do the streaming */
	282	sd->work_thread = create_singlethread_workqueue(MODULE_NAME);
	283	queue_work(sd->work_thread, &sd->work_struct);
	284
	285	return 0;
	286	}
	287
	288	/* called on streamoff with alt==0 and on disconnect */
	289	/* the usb_lock is held at entry - restore on exit */
	290	static void sd_stop0(struct gspca_dev *gspca_dev)
	291	{
	292	struct sd dev = (struct sd )gspca_dev;
	293
	294	/* wait for the work queue to terminate */
	295	mutex_unlock(&gspca_dev->usb_lock);
	296	/* This waits for vicam_dostream to finish */
	297	destroy_workqueue(dev->work_thread);
	298	dev->work_thread = NULL;
	299	mutex_lock(&gspca_dev->usb_lock);
	300
345321dc	301	if (gspca_dev->present)
27d3e366	302	vicam_set_camera_power(gspca_dev, 0);
49b61ec9 HG	303	}
49b61ec9 HG	304
4910adf1 HV	305	static int sd_init_controls(struct gspca_dev *gspca_dev)
	306	{
	307	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
	308
	309	gspca_dev->vdev.ctrl_handler = hdl;
	310	v4l2_ctrl_handler_init(hdl, 2);
	311	gspca_dev->exposure = v4l2_ctrl_new_std(hdl, NULL,
	312	V4L2_CID_EXPOSURE, 0, 2047, 1, 256);
	313	gspca_dev->gain = v4l2_ctrl_new_std(hdl, NULL,
	314	V4L2_CID_GAIN, 0, 255, 1, 200);
	315
	316	if (hdl->error) {
	317	pr_err("Could not initialize controls\n");
	318	return hdl->error;
	319	}
	320	return 0;
	321	}
	322
49b61ec9 HG	323	/* Table of supported USB devices */
	324	static const struct usb_device_id device_table[] = {
	325	{USB_DEVICE(0x04c1, 0x009d)},
	326	{USB_DEVICE(0x0602, 0x1001)},
	327	{}
	328	};
	329
	330	MODULE_DEVICE_TABLE(usb, device_table);
	331
	332	/* sub-driver description */
	333	static const struct sd_desc sd_desc = {
	334	.name = MODULE_NAME,
49b61ec9 HG	335	.config = sd_config,
49b61ec9 HG	336	.init = sd_init,
4910adf1	337	.init_controls = sd_init_controls,
49b61ec9 HG	338	.start = sd_start,
	339	.stop0 = sd_stop0,
	340	};
	341
	342	/* -- device connect -- */
	343	static int sd_probe(struct usb_interface *intf,
	344	const struct usb_device_id *id)
	345	{
	346	return gspca_dev_probe(intf, id,
	347	&sd_desc,
	348	sizeof(struct sd),
	349	THIS_MODULE);
	350	}
	351
	352	static struct usb_driver sd_driver = {
	353	.name = MODULE_NAME,
	354	.id_table = device_table,
	355	.probe = sd_probe,
	356	.disconnect = gspca_disconnect,
	357	#ifdef CONFIG_PM
	358	.suspend = gspca_suspend,
	359	.resume = gspca_resume,
8bb58964	360	.reset_resume = gspca_resume,
49b61ec9 HG	361	#endif
	362	};
	363
ecb3b2b3	364	module_usb_driver(sd_driver);