drivers/media/video/gspca/jeilinj.c - SHIFTPHONES/mainline/linux - Gitiles

 /*
  * Jeilinj subdriver
  *
  * Supports some Jeilin dual-mode cameras which use bulk transport and
  * download raw JPEG data.
  *
  * Copyright (C) 2009 Theodore Kilgore
  * Copyright (C) 2011 Patrice Chotard
  *
  * 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 "jeilinj"

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

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

 /* Default timeouts, in ms */
 #define JEILINJ_CMD_TIMEOUT 500
 #define JEILINJ_DATA_TIMEOUT 1000

 /* Maximum transfer size to use. */
 #define JEILINJ_MAX_TRANSFER 0x200
 #define FRAME_HEADER_LEN 0x10
 #define FRAME_START 0xFFFFFFFF

 /* Structure to hold all of our device specific stuff */
 struct sd {
 	struct gspca_dev gspca_dev;	/* !! must be the first item */
 	int blocks_left;
 	const struct v4l2_pix_format *cap_mode;
 	/* Driver stuff */
 	u8 quality;				 /* image quality */
 	u8 jpeg_hdr[JPEG_HDR_SZ];
 };

 struct jlj_command {
 	unsigned char instruction[2];
 	unsigned char ack_wanted;
 };

 /* AFAICT these cameras will only do 320x240. */
 static struct v4l2_pix_format jlj_mode[] = {
 	{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
 		.bytesperline = 320,
 		.sizeimage = 320 * 240,
 		.colorspace = V4L2_COLORSPACE_JPEG,
 		.priv = 0},
 	{ 640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
 		.bytesperline = 640,
 		.sizeimage = 640 * 480,
 		.colorspace = V4L2_COLORSPACE_JPEG,
 		.priv = 0}
 };

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

 /* All commands are two bytes only */
 static void jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command)
 {
 	int retval;

 	if (gspca_dev->usb_err < 0)
 		return;
 	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) {
 		err("command write [%02x] error %d",
 				gspca_dev->usb_buf[0], retval);
 		gspca_dev->usb_err = retval;
 	}
 }

 /* Responses are one byte only */
 static void jlj_read1(struct gspca_dev *gspca_dev, unsigned char response)
 {
 	int retval;

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

 static int jlj_start(struct gspca_dev *gspca_dev)
 {
 	int i;
 	u8 response = 0xff;
 	struct sd *sd = (struct sd *) gspca_dev;
 	struct jlj_command start_commands[] = {
 		{{0x71, 0x81}, 0},
 		{{0x70, 0x05}, 0},
 		{{0x95, 0x70}, 1},
 		{{0x71, 0x81}, 0},
 		{{0x70, 0x04}, 0},
 		{{0x95, 0x70}, 1},
 		{{0x71, 0x00}, 0},
 		{{0x70, 0x08}, 0},
 		{{0x95, 0x70}, 1},
 		{{0x94, 0x02}, 0},
 		{{0xde, 0x24}, 0},
 		{{0x94, 0x02}, 0},
 		{{0xdd, 0xf0}, 0},
 		{{0x94, 0x02}, 0},
 		{{0xe3, 0x2c}, 0},
 		{{0x94, 0x02}, 0},
 		{{0xe4, 0x00}, 0},
 		{{0x94, 0x02}, 0},
 		{{0xe5, 0x00}, 0},
 		{{0x94, 0x02}, 0},
 		{{0xe6, 0x2c}, 0},
 		{{0x94, 0x03}, 0},
 		{{0xaa, 0x00}, 0},
 		{{0x71, 0x1e}, 0},
 		{{0x70, 0x06}, 0},
 		{{0x71, 0x80}, 0},
 		{{0x70, 0x07}, 0}
 	};

 	sd->blocks_left = 0;
 	for (i = 0; i < ARRAY_SIZE(start_commands); i++) {
 		jlj_write2(gspca_dev, start_commands[i].instruction);
 		if (start_commands[i].ack_wanted)
 			jlj_read1(gspca_dev, response);
 	}
 	if (gspca_dev->usb_err < 0)
 		PDEBUG(D_ERR, "Start streaming command failed");
 	return gspca_dev->usb_err;
 }

 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			u8 *data, int len)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	int packet_type;
 	u32 header_marker;

 	PDEBUG(D_STREAM, "Got %d bytes out of %d for Block 0",
 			len, JEILINJ_MAX_TRANSFER);
 	if (len != JEILINJ_MAX_TRANSFER) {
 		PDEBUG(D_PACK, "bad length");
 		goto discard;
 	}
 	/* check if it's start of frame */
 	header_marker = ((u32 *)data)[0];
 	if (header_marker == FRAME_START) {
 		sd->blocks_left = data[0x0a] - 1;
 		PDEBUG(D_STREAM, "blocks_left = 0x%x", sd->blocks_left);
 		/* Start a new frame, and add the JPEG header, first thing */
 		gspca_frame_add(gspca_dev, FIRST_PACKET,
 				sd->jpeg_hdr, JPEG_HDR_SZ);
 		/* Toss line 0 of data block 0, keep the rest. */
 		gspca_frame_add(gspca_dev, INTER_PACKET,
 				data + FRAME_HEADER_LEN,
 				JEILINJ_MAX_TRANSFER - FRAME_HEADER_LEN);
 	} else if (sd->blocks_left > 0) {
 		PDEBUG(D_STREAM, "%d blocks remaining for frame",
 				sd->blocks_left);
 		sd->blocks_left -= 1;
 		if (sd->blocks_left == 0)
 			packet_type = LAST_PACKET;
 		else
 			packet_type = INTER_PACKET;
 		gspca_frame_add(gspca_dev, packet_type,
 				data, JEILINJ_MAX_TRANSFER);
 	} else
 		goto discard;
 	return;
 discard:
 	/* Discard data until a new frame starts. */
 	gspca_dev->last_packet_type = DISCARD_PACKET;
 }

 /* 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 *dev  = (struct sd *) gspca_dev;

 	dev->quality  = 85;
 	PDEBUG(D_PROBE,
 		"JEILINJ camera detected"
 		" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
 	cam->cam_mode = jlj_mode;
 	cam->nmodes = ARRAY_SIZE(jlj_mode);
 	cam->bulk = 1;
 	cam->bulk_nurbs = 1;
 	cam->bulk_size = JEILINJ_MAX_TRANSFER;
 	return 0;
 }

 static void sd_stopN(struct gspca_dev *gspca_dev)
 {
 	int i;
 	u8 *buf;
 	u8 stop_commands[][2] = {
 		{0x71, 0x00},
 		{0x70, 0x09},
 		{0x71, 0x80},
 		{0x70, 0x05}
 	};

 	for (;;) {
 		/* get the image remaining blocks */
 		usb_bulk_msg(gspca_dev->dev,
 				gspca_dev->urb[0]->pipe,
 				gspca_dev->urb[0]->transfer_buffer,
 				JEILINJ_MAX_TRANSFER, NULL,
 				JEILINJ_DATA_TIMEOUT);

 		/* search for 0xff 0xd9  (EOF for JPEG) */
 		i = 0;
 		buf = gspca_dev->urb[0]->transfer_buffer;
 		while ((i < (JEILINJ_MAX_TRANSFER - 1)) &&
 			((buf[i] != 0xff) || (buf[i+1] != 0xd9)))
 			i++;

 		if (i != (JEILINJ_MAX_TRANSFER - 1))
 			/* last remaining block found */
 			break;
 		}

 	for (i = 0; i < ARRAY_SIZE(stop_commands); i++)
 		jlj_write2(gspca_dev, stop_commands[i]);
 }

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

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

 	/* create the JPEG header */
 	jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width,
 			0x21);          /* JPEG 422 */
 	jpeg_set_qual(dev->jpeg_hdr, dev->quality);
 	PDEBUG(D_STREAM, "Start streaming at %dx%d",
 		gspca_dev->height, gspca_dev->width);
 	jlj_start(gspca_dev);
 	return gspca_dev->usb_err;
 }

 /* Table of supported USB devices */
 static const struct usb_device_id device_table[] = {
 	{USB_DEVICE(0x0979, 0x0280)},
 	{}
 };

 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,
 	.stopN  = sd_stopN,
 	.pkt_scan = sd_pkt_scan,
 };

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

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

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

 static void __exit sd_mod_exit(void)
 {
 	usb_deregister(&sd_driver);
 }

 module_init(sd_mod_init);
 module_exit(sd_mod_exit);
	/*
	* Jeilinj subdriver
	*
	* Supports some Jeilin dual-mode cameras which use bulk transport and
	* download raw JPEG data.
	*
	* Copyright (C) 2009 Theodore Kilgore
	* Copyright (C) 2011 Patrice Chotard
	*
	* 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 "jeilinj"

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

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

	/* Default timeouts, in ms */
	#define JEILINJ_CMD_TIMEOUT 500
	#define JEILINJ_DATA_TIMEOUT 1000

	/* Maximum transfer size to use. */
	#define JEILINJ_MAX_TRANSFER 0x200
	#define FRAME_HEADER_LEN 0x10
	#define FRAME_START 0xFFFFFFFF

	/* Structure to hold all of our device specific stuff */
	struct sd {
	struct gspca_dev gspca_dev; /* !! must be the first item */
	int blocks_left;
	const struct v4l2_pix_format *cap_mode;
	/* Driver stuff */
	u8 quality; /* image quality */
	u8 jpeg_hdr[JPEG_HDR_SZ];
	};

	struct jlj_command {
	unsigned char instruction[2];
	unsigned char ack_wanted;
	};

	/* AFAICT these cameras will only do 320x240. */
	static struct v4l2_pix_format jlj_mode[] = {
	{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
	.bytesperline = 320,
	.sizeimage = 320 * 240,
	.colorspace = V4L2_COLORSPACE_JPEG,
	.priv = 0},
	{ 640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
	.bytesperline = 640,
	.sizeimage = 640 * 480,
	.colorspace = V4L2_COLORSPACE_JPEG,
	.priv = 0}
	};

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

	/* All commands are two bytes only */
	static void jlj_write2(struct gspca_dev gspca_dev, unsigned char command)
	{
	int retval;

	if (gspca_dev->usb_err < 0)
	return;
	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) {
	err("command write [%02x] error %d",
	gspca_dev->usb_buf[0], retval);
	gspca_dev->usb_err = retval;
	}
	}

	/* Responses are one byte only */
	static void jlj_read1(struct gspca_dev *gspca_dev, unsigned char response)
	{
	int retval;

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

	static int jlj_start(struct gspca_dev *gspca_dev)
	{
	int i;
	u8 response = 0xff;
	struct sd sd = (struct sd ) gspca_dev;
	struct jlj_command start_commands[] = {
	{{0x71, 0x81}, 0},
	{{0x70, 0x05}, 0},
	{{0x95, 0x70}, 1},
	{{0x71, 0x81}, 0},
	{{0x70, 0x04}, 0},
	{{0x95, 0x70}, 1},
	{{0x71, 0x00}, 0},
	{{0x70, 0x08}, 0},
	{{0x95, 0x70}, 1},
	{{0x94, 0x02}, 0},
	{{0xde, 0x24}, 0},
	{{0x94, 0x02}, 0},
	{{0xdd, 0xf0}, 0},
	{{0x94, 0x02}, 0},
	{{0xe3, 0x2c}, 0},
	{{0x94, 0x02}, 0},
	{{0xe4, 0x00}, 0},
	{{0x94, 0x02}, 0},
	{{0xe5, 0x00}, 0},
	{{0x94, 0x02}, 0},
	{{0xe6, 0x2c}, 0},
	{{0x94, 0x03}, 0},
	{{0xaa, 0x00}, 0},
	{{0x71, 0x1e}, 0},
	{{0x70, 0x06}, 0},
	{{0x71, 0x80}, 0},
	{{0x70, 0x07}, 0}
	};

	sd->blocks_left = 0;
	for (i = 0; i < ARRAY_SIZE(start_commands); i++) {
	jlj_write2(gspca_dev, start_commands[i].instruction);
	if (start_commands[i].ack_wanted)
	jlj_read1(gspca_dev, response);
	}
	if (gspca_dev->usb_err < 0)
	PDEBUG(D_ERR, "Start streaming command failed");
	return gspca_dev->usb_err;
	}

	static void sd_pkt_scan(struct gspca_dev *gspca_dev,
	u8 *data, int len)
	{
	struct sd sd = (struct sd ) gspca_dev;
	int packet_type;
	u32 header_marker;

	PDEBUG(D_STREAM, "Got %d bytes out of %d for Block 0",
	len, JEILINJ_MAX_TRANSFER);
	if (len != JEILINJ_MAX_TRANSFER) {
	PDEBUG(D_PACK, "bad length");
	goto discard;
	}
	/* check if it's start of frame */
	header_marker = ((u32 *)data)[0];
	if (header_marker == FRAME_START) {
	sd->blocks_left = data[0x0a] - 1;
	PDEBUG(D_STREAM, "blocks_left = 0x%x", sd->blocks_left);
	/* Start a new frame, and add the JPEG header, first thing */
	gspca_frame_add(gspca_dev, FIRST_PACKET,
	sd->jpeg_hdr, JPEG_HDR_SZ);
	/* Toss line 0 of data block 0, keep the rest. */
	gspca_frame_add(gspca_dev, INTER_PACKET,
	data + FRAME_HEADER_LEN,
	JEILINJ_MAX_TRANSFER - FRAME_HEADER_LEN);
	} else if (sd->blocks_left > 0) {
	PDEBUG(D_STREAM, "%d blocks remaining for frame",
	sd->blocks_left);
	sd->blocks_left -= 1;
	if (sd->blocks_left == 0)
	packet_type = LAST_PACKET;
	else
	packet_type = INTER_PACKET;
	gspca_frame_add(gspca_dev, packet_type,
	data, JEILINJ_MAX_TRANSFER);
	} else
	goto discard;
	return;
	discard:
	/* Discard data until a new frame starts. */
	gspca_dev->last_packet_type = DISCARD_PACKET;
	}

	/* 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 dev = (struct sd ) gspca_dev;

	dev->quality = 85;
	PDEBUG(D_PROBE,
	"JEILINJ camera detected"
	" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
	cam->cam_mode = jlj_mode;
	cam->nmodes = ARRAY_SIZE(jlj_mode);
	cam->bulk = 1;
	cam->bulk_nurbs = 1;
	cam->bulk_size = JEILINJ_MAX_TRANSFER;
	return 0;
	}

	static void sd_stopN(struct gspca_dev *gspca_dev)
	{
	int i;
	u8 *buf;
	u8 stop_commands[][2] = {
	{0x71, 0x00},
	{0x70, 0x09},
	{0x71, 0x80},
	{0x70, 0x05}
	};

	for (;;) {
	/* get the image remaining blocks */
	usb_bulk_msg(gspca_dev->dev,
	gspca_dev->urb[0]->pipe,
	gspca_dev->urb[0]->transfer_buffer,
	JEILINJ_MAX_TRANSFER, NULL,
	JEILINJ_DATA_TIMEOUT);

	/* search for 0xff 0xd9 (EOF for JPEG) */
	i = 0;
	buf = gspca_dev->urb[0]->transfer_buffer;
	while ((i < (JEILINJ_MAX_TRANSFER - 1)) &&
	((buf[i] != 0xff) \|\| (buf[i+1] != 0xd9)))
	i++;

	if (i != (JEILINJ_MAX_TRANSFER - 1))
	/* last remaining block found */
	break;
	}

	for (i = 0; i < ARRAY_SIZE(stop_commands); i++)
	jlj_write2(gspca_dev, stop_commands[i]);
	}

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

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

	/* create the JPEG header */
	jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width,
	0x21); /* JPEG 422 */
	jpeg_set_qual(dev->jpeg_hdr, dev->quality);
	PDEBUG(D_STREAM, "Start streaming at %dx%d",
	gspca_dev->height, gspca_dev->width);
	jlj_start(gspca_dev);
	return gspca_dev->usb_err;
	}

	/* Table of supported USB devices */
	static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x0979, 0x0280)},
	{}
	};

	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,
	.stopN = sd_stopN,
	.pkt_scan = sd_pkt_scan,
	};

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

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

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

	static void __exit sd_mod_exit(void)
	{
	usb_deregister(&sd_driver);
	}

	module_init(sd_mod_init);
	module_exit(sd_mod_exit);