[deliverable/linux.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.
 *
 * 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 "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)
{
	int retval;

	retval = jl2005c_write_reg(gspca_dev, 0x07, 0x00);
	return retval;
}

/*
 * 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.
	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 "jl2005bcd"
	22
	23	#include <linux/workqueue.h>
	24	#include <linux/slab.h>
	25	#include "gspca.h"
	26
	27
	28	MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
	29	MODULE_DESCRIPTION("JL2005B/C/D USB Camera Driver");
	30	MODULE_LICENSE("GPL");
	31
	32	/* Default timeouts, in ms */
	33	#define JL2005C_CMD_TIMEOUT 500
	34	#define JL2005C_DATA_TIMEOUT 1000
	35
	36	/* Maximum transfer size to use. */
	37	#define JL2005C_MAX_TRANSFER 0x200
	38	#define FRAME_HEADER_LEN 16
	39
	40
	41	/* specific webcam descriptor */
	42	struct sd {
	43	struct gspca_dev gspca_dev; /* !! must be the first item */
	44	unsigned char firmware_id[6];
	45	const struct v4l2_pix_format *cap_mode;
	46	/* Driver stuff */
	47	struct work_struct work_struct;
fe3449a4 TK	48	u8 frame_brightness;
	49	int block_size; /* block size of camera */
	50	int vga; /* 1 if vga cam, 0 if cif cam */
	51	};
	52
	53
	54	/* Camera has two resolution settings. What they are depends on model. */
	55	static const struct v4l2_pix_format cif_mode[] = {
	56	{176, 144, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	57	.bytesperline = 176,
	58	.sizeimage = 176 * 144,
	59	.colorspace = V4L2_COLORSPACE_SRGB,
	60	.priv = 0},
	61	{352, 288, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	62	.bytesperline = 352,
	63	.sizeimage = 352 * 288,
	64	.colorspace = V4L2_COLORSPACE_SRGB,
	65	.priv = 0},
	66	};
	67
	68	static const struct v4l2_pix_format vga_mode[] = {
	69	{320, 240, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	70	.bytesperline = 320,
	71	.sizeimage = 320 * 240,
	72	.colorspace = V4L2_COLORSPACE_SRGB,
	73	.priv = 0},
	74	{640, 480, V4L2_PIX_FMT_JL2005BCD, V4L2_FIELD_NONE,
	75	.bytesperline = 640,
	76	.sizeimage = 640 * 480,
	77	.colorspace = V4L2_COLORSPACE_SRGB,
	78	.priv = 0},
	79	};
	80
	81	/*
	82	* cam uses endpoint 0x03 to send commands, 0x84 for read commands,
	83	* and 0x82 for bulk data transfer.
	84	*/
	85
	86	/* All commands are two bytes only */
	87	static int jl2005c_write2(struct gspca_dev gspca_dev, unsigned char command)
	88	{
	89	int retval;
	90
	91	memcpy(gspca_dev->usb_buf, command, 2);
	92	retval = usb_bulk_msg(gspca_dev->dev,
	93	usb_sndbulkpipe(gspca_dev->dev, 3),
	94	gspca_dev->usb_buf, 2, NULL, 500);
	95	if (retval < 0)
	96	pr_err("command write [%02x] error %d\n",
	97	gspca_dev->usb_buf[0], retval);
	98	return retval;
	99	}
	100
	101	/* Response to a command is one byte in usb_buf[0], only if requested. */
	102	static int jl2005c_read1(struct gspca_dev *gspca_dev)
	103	{
	104	int retval;
	105
	106	retval = usb_bulk_msg(gspca_dev->dev,
	107	usb_rcvbulkpipe(gspca_dev->dev, 0x84),
	108	gspca_dev->usb_buf, 1, NULL, 500);
	109	if (retval < 0)
	110	pr_err("read command [0x%02x] error %d\n",
	111	gspca_dev->usb_buf[0], retval);
112	return retval;
113	}
114
115	/* Response appears in gspca_dev->usb_buf[0] */
116	static int jl2005c_read_reg(struct gspca_dev *gspca_dev, unsigned char reg)
117	{
118	int retval;
119
120	static u8 instruction[2] = {0x95, 0x00};
121	/* put register to read in byte 1 */
122	instruction[1] = reg;
123	/* Send the read request */
124	retval = jl2005c_write2(gspca_dev, instruction);
125	if (retval < 0)
126	return retval;
127	retval = jl2005c_read1(gspca_dev);
128
129	return retval;
130	}
131
132	static int jl2005c_start_new_frame(struct gspca_dev *gspca_dev)
133	{
134	int i;
135	int retval;
136	int frame_brightness = 0;
137
138	static u8 instruction[2] = {0x7f, 0x01};
139
140	retval = jl2005c_write2(gspca_dev, instruction);
141	if (retval < 0)
142	return retval;
143
144	i = 0;
145	while (i < 20 && !frame_brightness) {
146	/* If we tried 20 times, give up. */
147	retval = jl2005c_read_reg(gspca_dev, 0x7e);
148	if (retval < 0)
149	return retval;
150	frame_brightness = gspca_dev->usb_buf[0];
151	retval = jl2005c_read_reg(gspca_dev, 0x7d);
152	if (retval < 0)
153	return retval;
154	i++;
155	}
156	PDEBUG(D_FRAM, "frame_brightness is 0x%02x", gspca_dev->usb_buf[0]);
157	return retval;
158	}
159
160	static int jl2005c_write_reg(struct gspca_dev *gspca_dev, unsigned char reg,
161	unsigned char value)
162	{
163	int retval;
164	u8 instruction[2];
165
166	instruction[0] = reg;
167	instruction[1] = value;
168
169	retval = jl2005c_write2(gspca_dev, instruction);
170	if (retval < 0)
171	return retval;
172
173	return retval;
174	}
175
176	static int jl2005c_get_firmware_id(struct gspca_dev *gspca_dev)
177	{
178	struct sd sd = (struct sd )gspca_dev;
179	int i = 0;
180	int retval = -1;
181	unsigned char regs_to_read[] = {0x57, 0x02, 0x03, 0x5d, 0x5e, 0x5f};
182
183	PDEBUG(D_PROBE, "Running jl2005c_get_firmware_id");
184	/* Read the first ID byte once for warmup */
185	retval = jl2005c_read_reg(gspca_dev, regs_to_read[0]);
186	PDEBUG(D_PROBE, "response is %02x", gspca_dev->usb_buf[0]);
187	if (retval < 0)
188	return retval;
189	/* Now actually get the ID string */
190	for (i = 0; i < 6; i++) {
191	retval = jl2005c_read_reg(gspca_dev, regs_to_read[i]);
192	if (retval < 0)
193	return retval;
194	sd->firmware_id[i] = gspca_dev->usb_buf[0];
195	}
196	PDEBUG(D_PROBE, "firmware ID is %02x%02x%02x%02x%02x%02x",
197	sd->firmware_id[0],
198	sd->firmware_id[1],
199	sd->firmware_id[2],
200	sd->firmware_id[3],
201	sd->firmware_id[4],
202	sd->firmware_id[5]);
203	return 0;
204	}
205
206	static int jl2005c_stream_start_vga_lg
207	(struct gspca_dev *gspca_dev)
208	{
209	int i;
210	int retval = -1;
211	static u8 instruction[][2] = {
212	{0x05, 0x00},
213	{0x7c, 0x00},
214	{0x7d, 0x18},
215	{0x02, 0x00},
216	{0x01, 0x00},
217	{0x04, 0x52},
218	};
219
220	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
221	msleep(60);
222	retval = jl2005c_write2(gspca_dev, instruction[i]);
223	if (retval < 0)
224	return retval;
225	}
226	msleep(60);
227	return retval;
228	}
229
230	static int jl2005c_stream_start_vga_small(struct gspca_dev *gspca_dev)
231	{
232	int i;
233	int retval = -1;
234	static u8 instruction[][2] = {
235	{0x06, 0x00},
236	{0x7c, 0x00},
237	{0x7d, 0x1a},
238	{0x02, 0x00},
239	{0x01, 0x00},
240	{0x04, 0x52},
241	};
242
243	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
244	msleep(60);
245	retval = jl2005c_write2(gspca_dev, instruction[i]);
246	if (retval < 0)
247	return retval;
248	}
249	msleep(60);
250	return retval;
251	}
252
253	static int jl2005c_stream_start_cif_lg(struct gspca_dev *gspca_dev)
254	{
255	int i;
256	int retval = -1;
257	static u8 instruction[][2] = {
258	{0x05, 0x00},
259	{0x7c, 0x00},
260	{0x7d, 0x30},
261	{0x02, 0x00},
262	{0x01, 0x00},
263	{0x04, 0x42},
264	};
265
266	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
267	msleep(60);
268	retval = jl2005c_write2(gspca_dev, instruction[i]);
269	if (retval < 0)
270	return retval;
271	}
272	msleep(60);
273	return retval;
274	}
275
276	static int jl2005c_stream_start_cif_small(struct gspca_dev *gspca_dev)
277	{
278	int i;
279	int retval = -1;
280	static u8 instruction[][2] = {
281	{0x06, 0x00},
282	{0x7c, 0x00},
283	{0x7d, 0x32},
284	{0x02, 0x00},
285	{0x01, 0x00},
286	{0x04, 0x42},
287	};
288
289	for (i = 0; i < ARRAY_SIZE(instruction); i++) {
290	msleep(60);
291	retval = jl2005c_write2(gspca_dev, instruction[i]);
292	if (retval < 0)
293	return retval;
294	}
295	msleep(60);
296	return retval;
297	}
298
299
300	static int jl2005c_stop(struct gspca_dev *gspca_dev)
301	{
302	int retval;
303
304	retval = jl2005c_write_reg(gspca_dev, 0x07, 0x00);
305	return retval;
306	}
307
844db450 HG	308	/*
844db450 HG	309	* This function is called as a workqueue function and runs whenever the camera
fe3449a4 TK	310	* is streaming data. Because it is a workqueue function it is allowed to sleep
fe3449a4 TK	311	* so we can use synchronous USB calls. To avoid possible collisions with other
844db450 HG	312	* threads attempting to use gspca_dev->usb_buf we take the usb_lock when
	313	* performing USB operations using it. In practice we don't really need this
	314	* as the camera doesn't provide any controls.
fe3449a4 TK	315	*/
	316	static void jl2005c_dostream(struct work_struct *work)
	317	{
	318	struct sd *dev = container_of(work, struct sd, work_struct);
	319	struct gspca_dev *gspca_dev = &dev->gspca_dev;
	320	int bytes_left = 0; /* bytes remaining in current frame. */
	321	int data_len; /* size to use for the next read. */
	322	int header_read = 0;
	323	unsigned char header_sig[2] = {0x4a, 0x4c};
	324	int act_len;
	325	int packet_type;
	326	int ret;
	327	u8 *buffer;
	328
	329	buffer = kmalloc(JL2005C_MAX_TRANSFER, GFP_KERNEL \| GFP_DMA);
	330	if (!buffer) {
	331	pr_err("Couldn't allocate USB buffer\n");
	332	goto quit_stream;
	333	}
	334
345321dc	335	while (gspca_dev->present && gspca_dev->streaming) {
4ad34da0 HV	336	#ifdef CONFIG_PM
	337	if (gspca_dev->frozen)
	338	break;
	339	#endif
fe3449a4 TK	340	/* Check if this is a new frame. If so, start the frame first */
	341	if (!header_read) {
	342	mutex_lock(&gspca_dev->usb_lock);
	343	ret = jl2005c_start_new_frame(gspca_dev);
	344	mutex_unlock(&gspca_dev->usb_lock);
	345	if (ret < 0)
	346	goto quit_stream;
	347	ret = usb_bulk_msg(gspca_dev->dev,
	348	usb_rcvbulkpipe(gspca_dev->dev, 0x82),
	349	buffer, JL2005C_MAX_TRANSFER, &act_len,
	350	JL2005C_DATA_TIMEOUT);
	351	PDEBUG(D_PACK,
	352	"Got %d bytes out of %d for header",
	353	act_len, JL2005C_MAX_TRANSFER);
	354	if (ret < 0 \|\| act_len < JL2005C_MAX_TRANSFER)
	355	goto quit_stream;
	356	/* Check whether we actually got the first blodk */
	357	if (memcmp(header_sig, buffer, 2) != 0) {
	358	pr_err("First block is not the first block\n");
	359	goto quit_stream;
	360	}
	361	/* total size to fetch is byte 7, times blocksize
	362	* of which we already got act_len */
	363	bytes_left = buffer[0x07] * dev->block_size - act_len;
	364	PDEBUG(D_PACK, "bytes_left = 0x%x", bytes_left);
	365	/* We keep the header. It has other information, too.*/
	366	packet_type = FIRST_PACKET;
	367	gspca_frame_add(gspca_dev, packet_type,
	368	buffer, act_len);
	369	header_read = 1;
	370	}
345321dc	371	while (bytes_left > 0 && gspca_dev->present) {
fe3449a4 TK	372	data_len = bytes_left > JL2005C_MAX_TRANSFER ?
	373	JL2005C_MAX_TRANSFER : bytes_left;
	374	ret = usb_bulk_msg(gspca_dev->dev,
	375	usb_rcvbulkpipe(gspca_dev->dev, 0x82),
	376	buffer, data_len, &act_len,
	377	JL2005C_DATA_TIMEOUT);
	378	if (ret < 0 \|\| act_len < data_len)
	379	goto quit_stream;
	380	PDEBUG(D_PACK,
	381	"Got %d bytes out of %d for frame",
	382	data_len, bytes_left);
	383	bytes_left -= data_len;
	384	if (bytes_left == 0) {
	385	packet_type = LAST_PACKET;
	386	header_read = 0;
	387	} else
	388	packet_type = INTER_PACKET;
	389	gspca_frame_add(gspca_dev, packet_type,
	390	buffer, data_len);
	391	}
	392	}
	393	quit_stream:
345321dc	394	if (gspca_dev->present) {
fe3449a4 TK	395	mutex_lock(&gspca_dev->usb_lock);
	396	jl2005c_stop(gspca_dev);
	397	mutex_unlock(&gspca_dev->usb_lock);
	398	}
	399	kfree(buffer);
	400	}
	401
	402
	403
	404
	405	/* This function is called at probe time */
	406	static int sd_config(struct gspca_dev *gspca_dev,
	407	const struct usb_device_id *id)
	408	{
	409	struct cam *cam;
	410	struct sd sd = (struct sd ) gspca_dev;
	411
	412	cam = &gspca_dev->cam;
	413	/* We don't use the buffer gspca allocates so make it small. */
	414	cam->bulk_size = 64;
	415	cam->bulk = 1;
	416	/* For the rest, the camera needs to be detected */
	417	jl2005c_get_firmware_id(gspca_dev);
	418	/* Here are some known firmware IDs
	419	* First some JL2005B cameras
	420	* {0x41, 0x07, 0x04, 0x2c, 0xe8, 0xf2} Sakar KidzCam
	421	* {0x45, 0x02, 0x08, 0xb9, 0x00, 0xd2} No-name JL2005B
	422	* JL2005C cameras
	423	* {0x01, 0x0c, 0x16, 0x10, 0xf8, 0xc8} Argus DC-1512
	424	* {0x12, 0x04, 0x03, 0xc0, 0x00, 0xd8} ICarly
	425	* {0x86, 0x08, 0x05, 0x02, 0x00, 0xd4} Jazz
	426	*
	427	* Based upon this scanty evidence, we can detect a CIF camera by
	428	* testing byte 0 for 0x4x.
	429	*/
	430	if ((sd->firmware_id[0] & 0xf0) == 0x40) {
	431	cam->cam_mode = cif_mode;
	432	cam->nmodes = ARRAY_SIZE(cif_mode);
	433	sd->block_size = 0x80;
	434	} else {
	435	cam->cam_mode = vga_mode;
	436	cam->nmodes = ARRAY_SIZE(vga_mode);
	437	sd->block_size = 0x200;
	438	}
	439
	440	INIT_WORK(&sd->work_struct, jl2005c_dostream);
	441
	442	return 0;
	443	}
	444
	445	/* this function is called at probe and resume time */
	446	static int sd_init(struct gspca_dev *gspca_dev)
	447	{
	448	return 0;
	449	}
	450
	451	static int sd_start(struct gspca_dev *gspca_dev)
	452	{
	453
	454	struct sd sd = (struct sd ) gspca_dev;
	455	sd->cap_mode = gspca_dev->cam.cam_mode;
	456
1966bc2a	457	switch (gspca_dev->pixfmt.width) {
fe3449a4 TK	458	case 640:
	459	PDEBUG(D_STREAM, "Start streaming at vga resolution");
	460	jl2005c_stream_start_vga_lg(gspca_dev);
	461	break;
	462	case 320:
	463	PDEBUG(D_STREAM, "Start streaming at qvga resolution");
	464	jl2005c_stream_start_vga_small(gspca_dev);
	465	break;
	466	case 352:
	467	PDEBUG(D_STREAM, "Start streaming at cif resolution");
	468	jl2005c_stream_start_cif_lg(gspca_dev);
	469	break;
	470	case 176:
	471	PDEBUG(D_STREAM, "Start streaming at qcif resolution");
	472	jl2005c_stream_start_cif_small(gspca_dev);
	473	break;
	474	default:
	475	pr_err("Unknown resolution specified\n");
	476	return -1;
	477	}
	478
e5964689	479	schedule_work(&sd->work_struct);
fe3449a4 TK	480
	481	return 0;
	482	}
	483
	484	/* called on streamoff with alt==0 and on disconnect */
	485	/* the usb_lock is held at entry - restore on exit */
	486	static void sd_stop0(struct gspca_dev *gspca_dev)
	487	{
	488	struct sd dev = (struct sd ) gspca_dev;
	489
	490	/* wait for the work queue to terminate */
	491	mutex_unlock(&gspca_dev->usb_lock);
	492	/* This waits for sq905c_dostream to finish */
e5964689	493	flush_work(&dev->work_struct);
fe3449a4 TK	494	mutex_lock(&gspca_dev->usb_lock);
	495	}
	496
	497
	498
	499	/* sub-driver description */
	500	static const struct sd_desc sd_desc = {
	501	.name = MODULE_NAME,
fe3449a4 TK	502	.config = sd_config,
	503	.init = sd_init,
	504	.start = sd_start,
	505	.stop0 = sd_stop0,
	506	};
	507
	508	/* -- module initialisation -- */
ec063351	509	static const struct usb_device_id device_table[] = {
fe3449a4 TK	510	{USB_DEVICE(0x0979, 0x0227)},
	511	{}
	512	};
	513	MODULE_DEVICE_TABLE(usb, device_table);
	514
	515	/* -- device connect -- */
	516	static int sd_probe(struct usb_interface *intf,
	517	const struct usb_device_id *id)
	518	{
	519	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	520	THIS_MODULE);
	521	}
	522
	523	static struct usb_driver sd_driver = {
	524	.name = MODULE_NAME,
	525	.id_table = device_table,
	526	.probe = sd_probe,
	527	.disconnect = gspca_disconnect,
	528	#ifdef CONFIG_PM
	529	.suspend = gspca_suspend,
	530	.resume = gspca_resume,
8bb58964	531	.reset_resume = gspca_resume,
fe3449a4 TK	532	#endif
	533	};
	534
e52ec680	535	module_usb_driver(sd_driver);