[mirror_ubuntu-artful-kernel.git] / drivers / media / usb / gspca / jl2005bcd.c

/*
 * Jeilin JL2005B/C/D library
 *
 * Copyright (C) 2011 Theodore Kilgore <kilgota@auburn.edu>
 *
 * 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.
 */

#define MODULE_NAME "jl2005bcd"

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


MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
MODULE_DESCRIPTION("JL2005B/C/D USB Camera Driver");
MODULE_LICENSE("GPL");

/* Default timeouts, in ms */
#define JL2005C_CMD_TIMEOUT 500
#define JL2005C_DATA_TIMEOUT 1000

/* Maximum transfer size to use. */
#define JL2005C_MAX_TRANSFER 0x200
#define FRAME_HEADER_LEN 16


/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;  /* !! must be the first item */
	unsigned char firmware_id[6];
	const struct v4l2_pix_format *cap_mode;
	/* Driver stuff */
	struct work_struct work_struct;
	u8 frame_brightness;
	int block_size;	/* block size of camera */
	int vga;	/* 1 if vga cam, 0 if cif cam */
};


/* Camera has two resolution settings. What they are depends on model. */
static const struct v4l2_pix_format cif_mode[] = {
	{176, 144, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
	{352, 288, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
		.bytesperline = 352,
		.sizeimage = 352 * 288,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

static const struct v4l2_pix_format vga_mode[] = {
	{320, 240, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
	{640, 480, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
		.bytesperline = 640,
		.sizeimage = 640 * 480,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

/*
 * cam uses endpoint 0x03 to send commands, 0x84 for read commands,
 * and 0x82 for bulk data transfer.
 */

/* All commands are two bytes only */
static int jl2005c_write2(struct gspca_dev *gspca_dev, unsigned char *command)
{
	int retval;

	memcpy(gspca_dev->usb_buf, command, 2);
	retval = usb_bulk_msg(gspca_dev->dev,
			usb_sndbulkpipe(gspca_dev->dev, 3),
			gspca_dev->usb_buf, 2, NULL, 500);
	if (retval < 0)
		pr_err("command write [%02x] error %d\n",
		       gspca_dev->usb_buf[0], retval);
	return retval;
}

/* Response to a command is one byte in usb_buf[0], only if requested. */
static int jl2005c_read1(struct gspca_dev *gspca_dev)
{
	int retval;

	retval = usb_bulk_msg(gspca_dev->dev,
				usb_rcvbulkpipe(gspca_dev->dev, 0x84),
				gspca_dev->usb_buf, 1, NULL, 500);
	if (retval < 0)
		pr_err("read command [0x%02x] error %d\n",
		       gspca_dev->usb_buf[0], retval);
	return retval;
}

/* Response appears in gspca_dev->usb_buf[0] */
static int jl2005c_read_reg(struct gspca_dev *gspca_dev, unsigned char reg)
{
	int retval;

	static u8 instruction[2] = {0x95, 0x00};
	/* put register to read in byte 1 */
	instruction[1] = reg;
	/* Send the read request */
	retval = jl2005c_write2(gspca_dev, instruction);
	if (retval < 0)
		return retval;
	retval = jl2005c_read1(gspca_dev);

	return retval;
}

static int jl2005c_start_new_frame(struct gspca_dev *gspca_dev)
{
	int i;
	int retval;
	int frame_brightness = 0;

	static u8 instruction[2] = {0x7f, 0x01};

	retval = jl2005c_write2(gspca_dev, instruction);
	if (retval < 0)
		return retval;

	i = 0;
	while (i < 20 && !frame_brightness) {
		/* If we tried 20 times, give up. */
		retval = jl2005c_read_reg(gspca_dev, 0x7e);
		if (retval < 0)
			return retval;
		frame_brightness = gspca_dev->usb_buf[0];
		retval = jl2005c_read_reg(gspca_dev, 0x7d);
		if (retval < 0)
			return retval;
		i++;
	}
	PDEBUG(D_FRAM, "frame_brightness is 0x%02x", gspca_dev->usb_buf[0]);
	return retval;
}

static int jl2005c_write_reg(struct gspca_dev *gspca_dev, unsigned char reg,
						    unsigned char value)
{
	int retval;
	u8 instruction[2];

	instruction[0] = reg;
	instruction[1] = value;

	retval = jl2005c_write2(gspca_dev, instruction);
	if (retval < 0)
			return retval;

	return retval;
}

static int jl2005c_get_firmware_id(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *)gspca_dev;
	int i = 0;
	int retval = -1;
	unsigned char regs_to_read[] = {0x57, 0x02, 0x03, 0x5d, 0x5e, 0x5f};

	PDEBUG(D_PROBE, "Running jl2005c_get_firmware_id");
	/* Read the first ID byte once for warmup */
	retval = jl2005c_read_reg(gspca_dev, regs_to_read[0]);
	PDEBUG(D_PROBE, "response is %02x", gspca_dev->usb_buf[0]);
	if (retval < 0)
		return retval;
	/* Now actually get the ID string */
	for (i = 0; i < 6; i++) {
		retval = jl2005c_read_reg(gspca_dev, regs_to_read[i]);
		if (retval < 0)
			return retval;
		sd->firmware_id[i] = gspca_dev->usb_buf[0];
	}
	PDEBUG(D_PROBE, "firmware ID is %02x%02x%02x%02x%02x%02x",
						sd->firmware_id[0],
						sd->firmware_id[1],
						sd->firmware_id[2],
						sd->firmware_id[3],
						sd->firmware_id[4],
						sd->firmware_id[5]);
	return 0;
}

static int jl2005c_stream_start_vga_lg
		    (struct gspca_dev *gspca_dev)
{
	int i;
	int retval = -1;
	static u8 instruction[][2] = {
		{0x05, 0x00},
		{0x7c, 0x00},
		{0x7d, 0x18},
		{0x02, 0x00},
		{0x01, 0x00},
		{0x04, 0x52},
	};

	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
		msleep(60);
		retval = jl2005c_write2(gspca_dev, instruction[i]);
		if (retval < 0)
			return retval;
	}
	msleep(60);
	return retval;
}

static int jl2005c_stream_start_vga_small(struct gspca_dev *gspca_dev)
{
	int i;
	int retval = -1;
	static u8 instruction[][2] = {
		{0x06, 0x00},
		{0x7c, 0x00},
		{0x7d, 0x1a},
		{0x02, 0x00},
		{0x01, 0x00},
		{0x04, 0x52},
	};

	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
		msleep(60);
		retval = jl2005c_write2(gspca_dev, instruction[i]);
		if (retval < 0)
			return retval;
	}
	msleep(60);
	return retval;
}

static int jl2005c_stream_start_cif_lg(struct gspca_dev *gspca_dev)
{
	int i;
	int retval = -1;
	static u8 instruction[][2] = {
		{0x05, 0x00},
		{0x7c, 0x00},
		{0x7d, 0x30},
		{0x02, 0x00},
		{0x01, 0x00},
		{0x04, 0x42},
	};

	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
		msleep(60);
		retval = jl2005c_write2(gspca_dev, instruction[i]);
		if (retval < 0)
			return retval;
	}
	msleep(60);
	return retval;
}

static int jl2005c_stream_start_cif_small(struct gspca_dev *gspca_dev)
{
	int i;
	int retval = -1;
	static u8 instruction[][2] = {
		{0x06, 0x00},
		{0x7c, 0x00},
		{0x7d, 0x32},
		{0x02, 0x00},
		{0x01, 0x00},
		{0x04, 0x42},
	};

	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
		msleep(60);
		retval = jl2005c_write2(gspca_dev, instruction[i]);
		if (retval < 0)
			return retval;
	}
	msleep(60);
	return retval;
}


static int jl2005c_stop(struct gspca_dev *gspca_dev)
{
	return jl2005c_write_reg(gspca_dev, 0x07, 0x00);
}

/*
 * 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 jl2005c_dostream(struct work_struct *work)
{
	struct sd *dev = container_of(work, struct sd, work_struct);
	struct gspca_dev *gspca_dev = &dev->gspca_dev;
	int bytes_left = 0; /* bytes remaining in current frame. */
	int data_len;   /* size to use for the next read. */
	int header_read = 0;
	unsigned char header_sig[2] = {0x4a, 0x4c};
	int act_len;
	int packet_type;
	int ret;
	u8 *buffer;

	buffer = kmalloc(JL2005C_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
	if (!buffer) {
		pr_err("Couldn't allocate USB buffer\n");
		goto quit_stream;
	}

	while (gspca_dev->present && gspca_dev->streaming) {
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			break;
#endif
		/* Check if this is a new frame. If so, start the frame first */
		if (!header_read) {
			mutex_lock(&gspca_dev->usb_lock);
			ret = jl2005c_start_new_frame(gspca_dev);
			mutex_unlock(&gspca_dev->usb_lock);
			if (ret < 0)
				goto quit_stream;
			ret = usb_bulk_msg(gspca_dev->dev,
				usb_rcvbulkpipe(gspca_dev->dev, 0x82),
				buffer, JL2005C_MAX_TRANSFER, &act_len,
				JL2005C_DATA_TIMEOUT);
			PDEBUG(D_PACK,
				"Got %d bytes out of %d for header",
					act_len, JL2005C_MAX_TRANSFER);
			if (ret < 0 || act_len < JL2005C_MAX_TRANSFER)
				goto quit_stream;
			/* Check whether we actually got the first blodk */
			if (memcmp(header_sig, buffer, 2) != 0) {
				pr_err("First block is not the first block\n");
				goto quit_stream;
			}
			/* total size to fetch is byte 7, times blocksize
			 * of which we already got act_len */
			bytes_left = buffer[0x07] * dev->block_size - act_len;
			PDEBUG(D_PACK, "bytes_left = 0x%x", bytes_left);
			/* We keep the header. It has other information, too.*/
			packet_type = FIRST_PACKET;
			gspca_frame_add(gspca_dev, packet_type,
					buffer, act_len);
			header_read = 1;
		}
		while (bytes_left > 0 && gspca_dev->present) {
			data_len = bytes_left > JL2005C_MAX_TRANSFER ?
				JL2005C_MAX_TRANSFER : bytes_left;
			ret = usb_bulk_msg(gspca_dev->dev,
				usb_rcvbulkpipe(gspca_dev->dev, 0x82),
				buffer, data_len, &act_len,
				JL2005C_DATA_TIMEOUT);
			if (ret < 0 || act_len < data_len)
				goto quit_stream;
			PDEBUG(D_PACK,
				"Got %d bytes out of %d for frame",
						data_len, bytes_left);
			bytes_left -= data_len;
			if (bytes_left == 0) {
				packet_type = LAST_PACKET;
				header_read = 0;
			} else
				packet_type = INTER_PACKET;
			gspca_frame_add(gspca_dev, packet_type,
					buffer, data_len);
		}
	}
quit_stream:
	if (gspca_dev->present) {
		mutex_lock(&gspca_dev->usb_lock);
		jl2005c_stop(gspca_dev);
		mutex_unlock(&gspca_dev->usb_lock);
	}
	kfree(buffer);
}


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

	cam = &gspca_dev->cam;
	/* We don't use the buffer gspca allocates so make it small. */
	cam->bulk_size = 64;
	cam->bulk = 1;
	/* For the rest, the camera needs to be detected */
	jl2005c_get_firmware_id(gspca_dev);
	/* Here are some known firmware IDs
	 * First some JL2005B cameras
	 * {0x41, 0x07, 0x04, 0x2c, 0xe8, 0xf2}	Sakar KidzCam
	 * {0x45, 0x02, 0x08, 0xb9, 0x00, 0xd2}	No-name JL2005B
	 * JL2005C cameras
	 * {0x01, 0x0c, 0x16, 0x10, 0xf8, 0xc8}	Argus DC-1512
	 * {0x12, 0x04, 0x03, 0xc0, 0x00, 0xd8}	ICarly
	 * {0x86, 0x08, 0x05, 0x02, 0x00, 0xd4}	Jazz
	 *
	 * Based upon this scanty evidence, we can detect a CIF camera by
	 * testing byte 0 for 0x4x.
	 */
	if ((sd->firmware_id[0] & 0xf0) == 0x40) {
		cam->cam_mode	= cif_mode;
		cam->nmodes	= ARRAY_SIZE(cif_mode);
		sd->block_size	= 0x80;
	} else {
		cam->cam_mode	= vga_mode;
		cam->nmodes	= ARRAY_SIZE(vga_mode);
		sd->block_size	= 0x200;
	}

	INIT_WORK(&sd->work_struct, jl2005c_dostream);

	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_start(struct gspca_dev *gspca_dev)
{

	struct sd *sd = (struct sd *) gspca_dev;
	sd->cap_mode = gspca_dev->cam.cam_mode;

	switch (gspca_dev->pixfmt.width) {
	case 640:
		PDEBUG(D_STREAM, "Start streaming at vga resolution");
		jl2005c_stream_start_vga_lg(gspca_dev);
		break;
	case 320:
		PDEBUG(D_STREAM, "Start streaming at qvga resolution");
		jl2005c_stream_start_vga_small(gspca_dev);
		break;
	case 352:
		PDEBUG(D_STREAM, "Start streaming at cif resolution");
		jl2005c_stream_start_cif_lg(gspca_dev);
		break;
	case 176:
		PDEBUG(D_STREAM, "Start streaming at qcif resolution");
		jl2005c_stream_start_cif_small(gspca_dev);
		break;
	default:
		pr_err("Unknown resolution specified\n");
		return -1;
	}

	schedule_work(&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 sq905c_dostream to finish */
	flush_work(&dev->work_struct);
	mutex_lock(&gspca_dev->usb_lock);
}


/* 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,
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x0979, 0x0227)},
	{}
};
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,
	.reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);
Commit	Line	Data
fe3449a4 TK	1	/*
	2	* Jeilin JL2005B/C/D library
	3	*
	4	* Copyright (C) 2011 Theodore Kilgore <kilgota@auburn.edu>
	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.
fe3449a4 TK	15	*/
	16
	17	#define MODULE_NAME "jl2005bcd"
	18
	19	#include <linux/workqueue.h>
	20	#include <linux/slab.h>
	21	#include "gspca.h"
	22
	23
	24	MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
	25	MODULE_DESCRIPTION("JL2005B/C/D USB Camera Driver");
	26	MODULE_LICENSE("GPL");
	27
	28	/* Default timeouts, in ms */
	29	#define JL2005C_CMD_TIMEOUT 500
	30	#define JL2005C_DATA_TIMEOUT 1000
	31
	32	/* Maximum transfer size to use. */
	33	#define JL2005C_MAX_TRANSFER 0x200
	34	#define FRAME_HEADER_LEN 16
	35
	36
	37	/* specific webcam descriptor */
	38	struct sd {
	39	struct gspca_dev gspca_dev; /* !! must be the first item */
	40	unsigned char firmware_id[6];
	41	const struct v4l2_pix_format *cap_mode;
	42	/* Driver stuff */
	43	struct work_struct work_struct;
fe3449a4 TK	44	u8 frame_brightness;
	45	int block_size; /* block size of camera */
	46	int vga; /* 1 if vga cam, 0 if cif cam */
	47	};
	48
	49
	50	/* Camera has two resolution settings. What they are depends on model. */
	51	static const struct v4l2_pix_format cif_mode[] = {
	52	{176, 144, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	53	.bytesperline = 176,
	54	.sizeimage = 176 * 144,
	55	.colorspace = V4L2_COLORSPACE_SRGB,
	56	.priv = 0},
	57	{352, 288, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	58	.bytesperline = 352,
	59	.sizeimage = 352 * 288,
	60	.colorspace = V4L2_COLORSPACE_SRGB,
	61	.priv = 0},
	62	};
	63
	64	static const struct v4l2_pix_format vga_mode[] = {
	65	{320, 240, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	66	.bytesperline = 320,
	67	.sizeimage = 320 * 240,
	68	.colorspace = V4L2_COLORSPACE_SRGB,
	69	.priv = 0},
	70	{640, 480, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	71	.bytesperline = 640,
	72	.sizeimage = 640 * 480,
	73	.colorspace = V4L2_COLORSPACE_SRGB,
	74	.priv = 0},
	75	};
	76
	77	/*
	78	* cam uses endpoint 0x03 to send commands, 0x84 for read commands,
	79	* and 0x82 for bulk data transfer.
	80	*/
	81
	82	/* All commands are two bytes only */
	83	static int jl2005c_write2(struct gspca_dev gspca_dev, unsigned char command)
	84	{
	85	int retval;
	86
	87	memcpy(gspca_dev->usb_buf, command, 2);
	88	retval = usb_bulk_msg(gspca_dev->dev,
	89	usb_sndbulkpipe(gspca_dev->dev, 3),
	90	gspca_dev->usb_buf, 2, NULL, 500);
	91	if (retval < 0)
	92	pr_err("command write [%02x] error %d\n",
	93	gspca_dev->usb_buf[0], retval);
	94	return retval;
	95	}
	96
	97	/* Response to a command is one byte in usb_buf[0], only if requested. */
	98	static int jl2005c_read1(struct gspca_dev *gspca_dev)
	99	{
	100	int retval;
	101
	102	retval = usb_bulk_msg(gspca_dev->dev,
	103	usb_rcvbulkpipe(gspca_dev->dev, 0x84),
	104	gspca_dev->usb_buf, 1, NULL, 500);
	105	if (retval < 0)
	106	pr_err("read command [0x%02x] error %d\n",
	107	gspca_dev->usb_buf[0], retval);
108	return retval;
109	}
110
111	/* Response appears in gspca_dev->usb_buf[0] */
112	static int jl2005c_read_reg(struct gspca_dev *gspca_dev, unsigned char reg)
113	{
114	int retval;
115
116	static u8 instruction[2] = {0x95, 0x00};
117	/* put register to read in byte 1 */
118	instruction[1] = reg;
119	/* Send the read request */
120	retval = jl2005c_write2(gspca_dev, instruction);
121	if (retval < 0)
122	return retval;
123	retval = jl2005c_read1(gspca_dev);
124
125	return retval;
126	}
127
128	static int jl2005c_start_new_frame(struct gspca_dev *gspca_dev)
129	{
130	int i;
131	int retval;
132	int frame_brightness = 0;
133
134	static u8 instruction[2] = {0x7f, 0x01};
135
136	retval = jl2005c_write2(gspca_dev, instruction);
137	if (retval < 0)
138	return retval;
139
140	i = 0;
141	while (i < 20 && !frame_brightness) {
142	/* If we tried 20 times, give up. */
143	retval = jl2005c_read_reg(gspca_dev, 0x7e);
144	if (retval < 0)
145	return retval;
146	frame_brightness = gspca_dev->usb_buf[0];
147	retval = jl2005c_read_reg(gspca_dev, 0x7d);
148	if (retval < 0)
149	return retval;
150	i++;
151	}
152	PDEBUG(D_FRAM, "frame_brightness is 0x%02x", gspca_dev->usb_buf[0]);
153	return retval;
154	}
155
156	static int jl2005c_write_reg(struct gspca_dev *gspca_dev, unsigned char reg,
157	unsigned char value)
158	{
159	int retval;
160	u8 instruction[2];
161
162	instruction[0] = reg;
163	instruction[1] = value;
164
165	retval = jl2005c_write2(gspca_dev, instruction);
166	if (retval < 0)
167	return retval;
168
169	return retval;
170	}
171
172	static int jl2005c_get_firmware_id(struct gspca_dev *gspca_dev)
173	{
174	struct sd sd = (struct sd )gspca_dev;
175	int i = 0;
176	int retval = -1;
177	unsigned char regs_to_read[] = {0x57, 0x02, 0x03, 0x5d, 0x5e, 0x5f};
178
179	PDEBUG(D_PROBE, "Running jl2005c_get_firmware_id");
180	/* Read the first ID byte once for warmup */
181	retval = jl2005c_read_reg(gspca_dev, regs_to_read[0]);
182	PDEBUG(D_PROBE, "response is %02x", gspca_dev->usb_buf[0]);
183	if (retval < 0)
184	return retval;
185	/* Now actually get the ID string */
186	for (i = 0; i < 6; i++) {
187	retval = jl2005c_read_reg(gspca_dev, regs_to_read[i]);
188	if (retval < 0)
189	return retval;
190	sd->firmware_id[i] = gspca_dev->usb_buf[0];
191	}
192	PDEBUG(D_PROBE, "firmware ID is %02x%02x%02x%02x%02x%02x",
193	sd->firmware_id[0],
194	sd->firmware_id[1],
195	sd->firmware_id[2],
196	sd->firmware_id[3],
197	sd->firmware_id[4],
198	sd->firmware_id[5]);
199	return 0;
200	}
201
202	static int jl2005c_stream_start_vga_lg
203	(struct gspca_dev *gspca_dev)
204	{
205	int i;
206	int retval = -1;
207	static u8 instruction[][2] = {
208	{0x05, 0x00},
209	{0x7c, 0x00},
210	{0x7d, 0x18},
211	{0x02, 0x00},
212	{0x01, 0x00},
213	{0x04, 0x52},
214	};
215
216	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
217	msleep(60);
218	retval = jl2005c_write2(gspca_dev, instruction[i]);
219	if (retval < 0)
220	return retval;
221	}
222	msleep(60);
223	return retval;
224	}
225
226	static int jl2005c_stream_start_vga_small(struct gspca_dev *gspca_dev)
227	{
228	int i;
229	int retval = -1;
230	static u8 instruction[][2] = {
231	{0x06, 0x00},
232	{0x7c, 0x00},
233	{0x7d, 0x1a},
234	{0x02, 0x00},
235	{0x01, 0x00},
236	{0x04, 0x52},
237	};
238
239	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
240	msleep(60);
241	retval = jl2005c_write2(gspca_dev, instruction[i]);
242	if (retval < 0)
243	return retval;
244	}
245	msleep(60);
246	return retval;
247	}
248
249	static int jl2005c_stream_start_cif_lg(struct gspca_dev *gspca_dev)
250	{
251	int i;
252	int retval = -1;
253	static u8 instruction[][2] = {
254	{0x05, 0x00},
255	{0x7c, 0x00},
256	{0x7d, 0x30},
257	{0x02, 0x00},
258	{0x01, 0x00},
259	{0x04, 0x42},
260	};
261
262	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
263	msleep(60);
264	retval = jl2005c_write2(gspca_dev, instruction[i]);
265	if (retval < 0)
266	return retval;
267	}
268	msleep(60);
269	return retval;
270	}
271
272	static int jl2005c_stream_start_cif_small(struct gspca_dev *gspca_dev)
273	{
274	int i;
275	int retval = -1;
276	static u8 instruction[][2] = {
277	{0x06, 0x00},
278	{0x7c, 0x00},
279	{0x7d, 0x32},
280	{0x02, 0x00},
281	{0x01, 0x00},
282	{0x04, 0x42},
283	};
284
285	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
286	msleep(60);
287	retval = jl2005c_write2(gspca_dev, instruction[i]);
288	if (retval < 0)
289	return retval;
290	}
291	msleep(60);
292	return retval;
293	}
294
295
296	static int jl2005c_stop(struct gspca_dev *gspca_dev)
297	{
29a8d979	298	return jl2005c_write_reg(gspca_dev, 0x07, 0x00);
fe3449a4 TK	299	}
fe3449a4 TK	300
844db450 HG	301	/*
844db450 HG	302	* This function is called as a workqueue function and runs whenever the camera
fe3449a4 TK	303	* is streaming data. Because it is a workqueue function it is allowed to sleep
fe3449a4 TK	304	* so we can use synchronous USB calls. To avoid possible collisions with other
844db450 HG	305	* threads attempting to use gspca_dev->usb_buf we take the usb_lock when
	306	* performing USB operations using it. In practice we don't really need this
	307	* as the camera doesn't provide any controls.
fe3449a4 TK	308	*/
	309	static void jl2005c_dostream(struct work_struct *work)
	310	{
	311	struct sd *dev = container_of(work, struct sd, work_struct);
	312	struct gspca_dev *gspca_dev = &dev->gspca_dev;
	313	int bytes_left = 0; /* bytes remaining in current frame. */
	314	int data_len; /* size to use for the next read. */
	315	int header_read = 0;
	316	unsigned char header_sig[2] = {0x4a, 0x4c};
	317	int act_len;
	318	int packet_type;
	319	int ret;
	320	u8 *buffer;
	321
	322	buffer = kmalloc(JL2005C_MAX_TRANSFER, GFP_KERNEL \| GFP_DMA);
	323	if (!buffer) {
	324	pr_err("Couldn't allocate USB buffer\n");
	325	goto quit_stream;
	326	}
	327
345321dc	328	while (gspca_dev->present && gspca_dev->streaming) {
4ad34da0 HV	329	#ifdef CONFIG_PM
	330	if (gspca_dev->frozen)
	331	break;
	332	#endif
fe3449a4 TK	333	/* Check if this is a new frame. If so, start the frame first */
	334	if (!header_read) {
	335	mutex_lock(&gspca_dev->usb_lock);
	336	ret = jl2005c_start_new_frame(gspca_dev);
	337	mutex_unlock(&gspca_dev->usb_lock);
	338	if (ret < 0)
	339	goto quit_stream;
	340	ret = usb_bulk_msg(gspca_dev->dev,
	341	usb_rcvbulkpipe(gspca_dev->dev, 0x82),
	342	buffer, JL2005C_MAX_TRANSFER, &act_len,
	343	JL2005C_DATA_TIMEOUT);
	344	PDEBUG(D_PACK,
	345	"Got %d bytes out of %d for header",
	346	act_len, JL2005C_MAX_TRANSFER);
	347	if (ret < 0 \|\| act_len < JL2005C_MAX_TRANSFER)
	348	goto quit_stream;
	349	/* Check whether we actually got the first blodk */
	350	if (memcmp(header_sig, buffer, 2) != 0) {
	351	pr_err("First block is not the first block\n");
	352	goto quit_stream;
	353	}
	354	/* total size to fetch is byte 7, times blocksize
	355	* of which we already got act_len */
	356	bytes_left = buffer[0x07] * dev->block_size - act_len;
	357	PDEBUG(D_PACK, "bytes_left = 0x%x", bytes_left);
	358	/* We keep the header. It has other information, too.*/
	359	packet_type = FIRST_PACKET;
	360	gspca_frame_add(gspca_dev, packet_type,
	361	buffer, act_len);
	362	header_read = 1;
	363	}
345321dc	364	while (bytes_left > 0 && gspca_dev->present) {
fe3449a4 TK	365	data_len = bytes_left > JL2005C_MAX_TRANSFER ?
	366	JL2005C_MAX_TRANSFER : bytes_left;
	367	ret = usb_bulk_msg(gspca_dev->dev,
	368	usb_rcvbulkpipe(gspca_dev->dev, 0x82),
	369	buffer, data_len, &act_len,
	370	JL2005C_DATA_TIMEOUT);
	371	if (ret < 0 \|\| act_len < data_len)
	372	goto quit_stream;
	373	PDEBUG(D_PACK,
	374	"Got %d bytes out of %d for frame",
	375	data_len, bytes_left);
	376	bytes_left -= data_len;
	377	if (bytes_left == 0) {
	378	packet_type = LAST_PACKET;
	379	header_read = 0;
	380	} else
	381	packet_type = INTER_PACKET;
	382	gspca_frame_add(gspca_dev, packet_type,
	383	buffer, data_len);
	384	}
	385	}
	386	quit_stream:
345321dc	387	if (gspca_dev->present) {
fe3449a4 TK	388	mutex_lock(&gspca_dev->usb_lock);
	389	jl2005c_stop(gspca_dev);
	390	mutex_unlock(&gspca_dev->usb_lock);
	391	}
	392	kfree(buffer);
	393	}
	394
	395
	396
	397
	398	/* This function is called at probe time */
	399	static int sd_config(struct gspca_dev *gspca_dev,
	400	const struct usb_device_id *id)
	401	{
	402	struct cam *cam;
	403	struct sd sd = (struct sd ) gspca_dev;
	404
	405	cam = &gspca_dev->cam;
	406	/* We don't use the buffer gspca allocates so make it small. */
	407	cam->bulk_size = 64;
	408	cam->bulk = 1;
	409	/* For the rest, the camera needs to be detected */
	410	jl2005c_get_firmware_id(gspca_dev);
	411	/* Here are some known firmware IDs
	412	* First some JL2005B cameras
	413	* {0x41, 0x07, 0x04, 0x2c, 0xe8, 0xf2} Sakar KidzCam
	414	* {0x45, 0x02, 0x08, 0xb9, 0x00, 0xd2} No-name JL2005B
	415	* JL2005C cameras
	416	* {0x01, 0x0c, 0x16, 0x10, 0xf8, 0xc8} Argus DC-1512
	417	* {0x12, 0x04, 0x03, 0xc0, 0x00, 0xd8} ICarly
	418	* {0x86, 0x08, 0x05, 0x02, 0x00, 0xd4} Jazz
	419	*
	420	* Based upon this scanty evidence, we can detect a CIF camera by
	421	* testing byte 0 for 0x4x.
	422	*/
	423	if ((sd->firmware_id[0] & 0xf0) == 0x40) {
	424	cam->cam_mode = cif_mode;
	425	cam->nmodes = ARRAY_SIZE(cif_mode);
	426	sd->block_size = 0x80;
	427	} else {
	428	cam->cam_mode = vga_mode;
	429	cam->nmodes = ARRAY_SIZE(vga_mode);
	430	sd->block_size = 0x200;
	431	}
	432
	433	INIT_WORK(&sd->work_struct, jl2005c_dostream);
	434
	435	return 0;
	436	}
	437
	438	/* this function is called at probe and resume time */
	439	static int sd_init(struct gspca_dev *gspca_dev)
	440	{
	441	return 0;
	442	}
	443
	444	static int sd_start(struct gspca_dev *gspca_dev)
	445	{
	446
	447	struct sd sd = (struct sd ) gspca_dev;
	448	sd->cap_mode = gspca_dev->cam.cam_mode;
	449
1966bc2a	450	switch (gspca_dev->pixfmt.width) {
fe3449a4 TK	451	case 640:
	452	PDEBUG(D_STREAM, "Start streaming at vga resolution");
	453	jl2005c_stream_start_vga_lg(gspca_dev);
	454	break;
	455	case 320:
	456	PDEBUG(D_STREAM, "Start streaming at qvga resolution");
	457	jl2005c_stream_start_vga_small(gspca_dev);
	458	break;
	459	case 352:
	460	PDEBUG(D_STREAM, "Start streaming at cif resolution");
	461	jl2005c_stream_start_cif_lg(gspca_dev);
	462	break;
	463	case 176:
	464	PDEBUG(D_STREAM, "Start streaming at qcif resolution");
	465	jl2005c_stream_start_cif_small(gspca_dev);
	466	break;
	467	default:
	468	pr_err("Unknown resolution specified\n");
	469	return -1;
	470	}
	471
e5964689	472	schedule_work(&sd->work_struct);
fe3449a4 TK	473
	474	return 0;
	475	}
	476
	477	/* called on streamoff with alt==0 and on disconnect */
	478	/* the usb_lock is held at entry - restore on exit */
	479	static void sd_stop0(struct gspca_dev *gspca_dev)
	480	{
	481	struct sd dev = (struct sd ) gspca_dev;
	482
	483	/* wait for the work queue to terminate */
	484	mutex_unlock(&gspca_dev->usb_lock);
	485	/* This waits for sq905c_dostream to finish */
e5964689	486	flush_work(&dev->work_struct);
fe3449a4 TK	487	mutex_lock(&gspca_dev->usb_lock);
	488	}
	489
	490
	491
	492	/* sub-driver description */
	493	static const struct sd_desc sd_desc = {
	494	.name = MODULE_NAME,
fe3449a4 TK	495	.config = sd_config,
	496	.init = sd_init,
	497	.start = sd_start,
	498	.stop0 = sd_stop0,
	499	};
	500
	501	/* -- module initialisation -- */
ec063351	502	static const struct usb_device_id device_table[] = {
fe3449a4 TK	503	{USB_DEVICE(0x0979, 0x0227)},
	504	{}
	505	};
	506	MODULE_DEVICE_TABLE(usb, device_table);
	507
	508	/* -- device connect -- */
	509	static int sd_probe(struct usb_interface *intf,
	510	const struct usb_device_id *id)
	511	{
	512	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	513	THIS_MODULE);
	514	}
	515
	516	static struct usb_driver sd_driver = {
	517	.name = MODULE_NAME,
	518	.id_table = device_table,
	519	.probe = sd_probe,
	520	.disconnect = gspca_disconnect,
	521	#ifdef CONFIG_PM
	522	.suspend = gspca_suspend,
	523	.resume = gspca_resume,
8bb58964	524	.reset_resume = gspca_resume,
fe3449a4 TK	525	#endif
	526	};
	527
e52ec680	528	module_usb_driver(sd_driver);