[mirror_ubuntu-artful-kernel.git] / drivers / media / video / gspca / konica.c

/*
 * Driver for USB webcams based on Konica chipset. This
 * chipset is used in Intel YC76 camera.
 *
 * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
 *
 * Based on the usbvideo v4l1 konicawc driver which is:
 *
 * Copyright (C) 2002 Simon Evans <spse@secret.org.uk>
 *
 * The code for making gspca work with a webcam with 2 isoc endpoints was
 * taken from the benq gspca subdriver which is:
 *
 * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
 *
 * 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 "konica"

#include <linux/input.h>
#include "gspca.h"

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
MODULE_LICENSE("GPL");

#define WHITEBAL_REG   0x01
#define BRIGHTNESS_REG 0x02
#define SHARPNESS_REG  0x03
#define CONTRAST_REG   0x04
#define SATURATION_REG 0x05

/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;	/* !! must be the first item */
	struct urb *last_data_urb;
	u8 snapshot_pressed;
};


/* .priv is what goes to register 8 for this mode, known working values:
   0x00 -> 176x144, cropped
   0x01 -> 176x144, cropped
   0x02 -> 176x144, cropped
   0x03 -> 176x144, cropped
   0x04 -> 176x144, binned
   0x05 -> 320x240
   0x06 -> 320x240
   0x07 -> 160x120, cropped
   0x08 -> 160x120, cropped
   0x09 -> 160x120, binned (note has 136 lines)
   0x0a -> 160x120, binned (note has 136 lines)
   0x0b -> 160x120, cropped
*/
static const struct v4l2_pix_format vga_mode[] = {
	{160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 136 * 3 / 2 + 960,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0x0a},
	{176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144 * 3 / 2 + 960,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0x04},
	{320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 3 / 2 + 960,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0x05},
};

static void sd_isoc_irq(struct urb *urb);

static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
{
	struct usb_device *dev = gspca_dev->dev;
	int ret;

	if (gspca_dev->usb_err < 0)
		return;
	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
			0x02,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			value,
			index,
			NULL,
			0,
			1000);
	if (ret < 0) {
		pr_err("reg_w err %d\n", ret);
		gspca_dev->usb_err = ret;
	}
}

static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
{
	struct usb_device *dev = gspca_dev->dev;
	int ret;

	if (gspca_dev->usb_err < 0)
		return;
	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			0x03,
			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			value,
			index,
			gspca_dev->usb_buf,
			2,
			1000);
	if (ret < 0) {
		pr_err("reg_w err %d\n", ret);
		gspca_dev->usb_err = ret;
	}
}

static void konica_stream_on(struct gspca_dev *gspca_dev)
{
	reg_w(gspca_dev, 1, 0x0b);
}

static void konica_stream_off(struct gspca_dev *gspca_dev)
{
	reg_w(gspca_dev, 0, 0x0b);
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
			const struct usb_device_id *id)
{
	gspca_dev->cam.cam_mode = vga_mode;
	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
	gspca_dev->cam.no_urb_create = 1;

	return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
	/* HDG not sure if these 2 reads are needed */
	reg_r(gspca_dev, 0, 0x10);
	PDEBUG(D_PROBE, "Reg 0x10 reads: %02x %02x",
	       gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
	reg_r(gspca_dev, 0, 0x10);
	PDEBUG(D_PROBE, "Reg 0x10 reads: %02x %02x",
	       gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
	reg_w(gspca_dev, 0, 0x0d);

	return 0;
}

static int sd_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	struct urb *urb;
	int i, n, packet_size;
	struct usb_host_interface *alt;
	struct usb_interface *intf;

	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
	if (!alt) {
		pr_err("Couldn't get altsetting\n");
		return -EIO;
	}

	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);

	n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
	reg_w(gspca_dev, n, 0x08);

	konica_stream_on(gspca_dev);

	if (gspca_dev->usb_err)
		return gspca_dev->usb_err;

	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
#if MAX_NURBS < 4
#error "Not enough URBs in the gspca table"
#endif
#define SD_NPKT 32
	for (n = 0; n < 4; n++) {
		i = n & 1 ? 0 : 1;
		packet_size =
			le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
		urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
		if (!urb) {
			pr_err("usb_alloc_urb failed\n");
			return -ENOMEM;
		}
		gspca_dev->urb[n] = urb;
		urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
						packet_size * SD_NPKT,
						GFP_KERNEL,
						&urb->transfer_dma);
		if (urb->transfer_buffer == NULL) {
			pr_err("usb_buffer_alloc failed\n");
			return -ENOMEM;
		}

		urb->dev = gspca_dev->dev;
		urb->context = gspca_dev;
		urb->transfer_buffer_length = packet_size * SD_NPKT;
		urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
					n & 1 ? 0x81 : 0x82);
		urb->transfer_flags = URB_ISO_ASAP
					| URB_NO_TRANSFER_DMA_MAP;
		urb->interval = 1;
		urb->complete = sd_isoc_irq;
		urb->number_of_packets = SD_NPKT;
		for (i = 0; i < SD_NPKT; i++) {
			urb->iso_frame_desc[i].length = packet_size;
			urb->iso_frame_desc[i].offset = packet_size * i;
		}
	}

	return 0;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;

	konica_stream_off(gspca_dev);
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
	/* Don't keep the button in the pressed state "forever" if it was
	   pressed when streaming is stopped */
	if (sd->snapshot_pressed) {
		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
		input_sync(gspca_dev->input_dev);
		sd->snapshot_pressed = 0;
	}
#endif
}

/* reception of an URB */
static void sd_isoc_irq(struct urb *urb)
{
	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
	struct sd *sd = (struct sd *) gspca_dev;
	struct urb *data_urb, *status_urb;
	u8 *data;
	int i, st;

	PDEBUG(D_PACK, "sd isoc irq");
	if (!gspca_dev->streaming)
		return;

	if (urb->status != 0) {
		if (urb->status == -ESHUTDOWN)
			return;		/* disconnection */
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			return;
#endif
		PDEBUG(D_ERR, "urb status: %d", urb->status);
		st = usb_submit_urb(urb, GFP_ATOMIC);
		if (st < 0)
			pr_err("resubmit urb error %d\n", st);
		return;
	}

	/* if this is a data URB (ep 0x82), wait */
	if (urb->transfer_buffer_length > 32) {
		sd->last_data_urb = urb;
		return;
	}

	status_urb = urb;
	data_urb   = sd->last_data_urb;
	sd->last_data_urb = NULL;

	if (!data_urb || data_urb->start_frame != status_urb->start_frame) {
		PDEBUG(D_ERR|D_PACK, "lost sync on frames");
		goto resubmit;
	}

	if (data_urb->number_of_packets != status_urb->number_of_packets) {
		PDEBUG(D_ERR|D_PACK,
		       "no packets does not match, data: %d, status: %d",
		       data_urb->number_of_packets,
		       status_urb->number_of_packets);
		goto resubmit;
	}

	for (i = 0; i < status_urb->number_of_packets; i++) {
		if (data_urb->iso_frame_desc[i].status ||
		    status_urb->iso_frame_desc[i].status) {
			PDEBUG(D_ERR|D_PACK,
			       "pkt %d data-status %d, status-status %d", i,
			       data_urb->iso_frame_desc[i].status,
			       status_urb->iso_frame_desc[i].status);
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}

		if (status_urb->iso_frame_desc[i].actual_length != 1) {
			PDEBUG(D_ERR|D_PACK,
			       "bad status packet length %d",
			       status_urb->iso_frame_desc[i].actual_length);
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}

		st = *((u8 *)status_urb->transfer_buffer
				+ status_urb->iso_frame_desc[i].offset);

		data = (u8 *)data_urb->transfer_buffer
				+ data_urb->iso_frame_desc[i].offset;

		/* st: 0x80-0xff: frame start with frame number (ie 0-7f)
		 * otherwise:
		 * bit 0 0: keep packet
		 *	 1: drop packet (padding data)
		 *
		 * bit 4 0 button not clicked
		 *       1 button clicked
		 * button is used to `take a picture' (in software)
		 */
		if (st & 0x80) {
			gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
			gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
		} else {
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
			u8 button_state = st & 0x40 ? 1 : 0;
			if (sd->snapshot_pressed != button_state) {
				input_report_key(gspca_dev->input_dev,
						 KEY_CAMERA,
						 button_state);
				input_sync(gspca_dev->input_dev);
				sd->snapshot_pressed = button_state;
			}
#endif
			if (st & 0x01)
				continue;
		}
		gspca_frame_add(gspca_dev, INTER_PACKET, data,
				data_urb->iso_frame_desc[i].actual_length);
	}

resubmit:
	if (data_urb) {
		st = usb_submit_urb(data_urb, GFP_ATOMIC);
		if (st < 0)
			PDEBUG(D_ERR|D_PACK,
			       "usb_submit_urb(data_urb) ret %d", st);
	}
	st = usb_submit_urb(status_urb, GFP_ATOMIC);
	if (st < 0)
		pr_err("usb_submit_urb(status_urb) ret %d\n", st);
}

static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct gspca_dev *gspca_dev =
		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);

	gspca_dev->usb_err = 0;

	if (!gspca_dev->streaming)
		return 0;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_CONTRAST:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_SATURATION:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, SATURATION_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_SHARPNESS:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
		konica_stream_on(gspca_dev);
		break;
	}
	return gspca_dev->usb_err;
}

static const struct v4l2_ctrl_ops sd_ctrl_ops = {
	.s_ctrl = sd_s_ctrl,
};

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, 5);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
	/* Needs to be verified */
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_CONTRAST, 0, 9, 1, 4);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_SATURATION, 0, 9, 1, 4);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_WHITE_BALANCE_TEMPERATURE,
			0, 33, 1, 25);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_SHARPNESS, 0, 9, 1, 4);

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

/* 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,
	.stopN = sd_stopN,
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
	.other_input = 1,
#endif
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
	{}
};
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,
#endif
};

module_usb_driver(sd_driver);
Commit	Line	Data
b517af72 HG	1	/*
	2	* Driver for USB webcams based on Konica chipset. This
	3	* chipset is used in Intel YC76 camera.
	4	*
	5	* Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
	6	*
	7	* Based on the usbvideo v4l1 konicawc driver which is:
	8	*
	9	* Copyright (C) 2002 Simon Evans <spse@secret.org.uk>
	10	*
	11	* The code for making gspca work with a webcam with 2 isoc endpoints was
	12	* taken from the benq gspca subdriver which is:
	13	*
	14	* Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	29	*/
	30
133a9fe9 JP	31	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
133a9fe9 JP	32
b517af72 HG	33	#define MODULE_NAME "konica"
	34
	35	#include <linux/input.h>
	36	#include "gspca.h"
	37
	38	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	39	MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
	40	MODULE_LICENSE("GPL");
	41
	42	#define WHITEBAL_REG 0x01
	43	#define BRIGHTNESS_REG 0x02
	44	#define SHARPNESS_REG 0x03
	45	#define CONTRAST_REG 0x04
	46	#define SATURATION_REG 0x05
	47
	48	/* specific webcam descriptor */
	49	struct sd {
	50	struct gspca_dev gspca_dev; /* !! must be the first item */
	51	struct urb *last_data_urb;
	52	u8 snapshot_pressed;
b517af72 HG	53	};
b517af72 HG	54
b517af72 HG	55
	56	/* .priv is what goes to register 8 for this mode, known working values:
	57	0x00 -> 176x144, cropped
	58	0x01 -> 176x144, cropped
	59	0x02 -> 176x144, cropped
	60	0x03 -> 176x144, cropped
	61	0x04 -> 176x144, binned
	62	0x05 -> 320x240
	63	0x06 -> 320x240
	64	0x07 -> 160x120, cropped
	65	0x08 -> 160x120, cropped
	66	0x09 -> 160x120, binned (note has 136 lines)
	67	0x0a -> 160x120, binned (note has 136 lines)
	68	0x0b -> 160x120, cropped
	69	*/
	70	static const struct v4l2_pix_format vga_mode[] = {
	71	{160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
	72	.bytesperline = 160,
	73	.sizeimage = 160 * 136 * 3 / 2 + 960,
	74	.colorspace = V4L2_COLORSPACE_SRGB,
	75	.priv = 0x0a},
	76	{176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
	77	.bytesperline = 176,
	78	.sizeimage = 176 * 144 * 3 / 2 + 960,
	79	.colorspace = V4L2_COLORSPACE_SRGB,
	80	.priv = 0x04},
	81	{320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
	82	.bytesperline = 320,
	83	.sizeimage = 320 * 240 * 3 / 2 + 960,
	84	.colorspace = V4L2_COLORSPACE_SRGB,
	85	.priv = 0x05},
	86	};
	87
	88	static void sd_isoc_irq(struct urb *urb);
	89
	90	static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
	91	{
	92	struct usb_device *dev = gspca_dev->dev;
	93	int ret;
	94
	95	if (gspca_dev->usb_err < 0)
	96	return;
	97	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	98	0x02,
	99	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	100	value,
	101	index,
	102	NULL,
	103	0,
	104	1000);
	105	if (ret < 0) {
133a9fe9	106	pr_err("reg_w err %d\n", ret);
b517af72 HG	107	gspca_dev->usb_err = ret;
	108	}
	109	}
	110
	111	static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
	112	{
	113	struct usb_device *dev = gspca_dev->dev;
	114	int ret;
	115
	116	if (gspca_dev->usb_err < 0)
	117	return;
	118	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	119	0x03,
	120	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	121	value,
	122	index,
	123	gspca_dev->usb_buf,
	124	2,
	125	1000);
	126	if (ret < 0) {
133a9fe9	127	pr_err("reg_w err %d\n", ret);
b517af72 HG	128	gspca_dev->usb_err = ret;
	129	}
	130	}
	131
	132	static void konica_stream_on(struct gspca_dev *gspca_dev)
	133	{
	134	reg_w(gspca_dev, 1, 0x0b);
	135	}
	136
	137	static void konica_stream_off(struct gspca_dev *gspca_dev)
	138	{
	139	reg_w(gspca_dev, 0, 0x0b);
	140	}
	141
	142	/* this function is called at probe time */
	143	static int sd_config(struct gspca_dev *gspca_dev,
	144	const struct usb_device_id *id)
	145	{
b517af72 HG	146	gspca_dev->cam.cam_mode = vga_mode;
	147	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
	148	gspca_dev->cam.no_urb_create = 1;
b517af72	149
b517af72 HG	150	return 0;
	151	}
	152
	153	/* this function is called at probe and resume time */
	154	static int sd_init(struct gspca_dev *gspca_dev)
	155	{
	156	/* HDG not sure if these 2 reads are needed */
	157	reg_r(gspca_dev, 0, 0x10);
	158	PDEBUG(D_PROBE, "Reg 0x10 reads: %02x %02x",
	159	gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
	160	reg_r(gspca_dev, 0, 0x10);
	161	PDEBUG(D_PROBE, "Reg 0x10 reads: %02x %02x",
	162	gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
	163	reg_w(gspca_dev, 0, 0x0d);
	164
	165	return 0;
	166	}
	167
	168	static int sd_start(struct gspca_dev *gspca_dev)
	169	{
	170	struct sd sd = (struct sd ) gspca_dev;
	171	struct urb *urb;
	172	int i, n, packet_size;
	173	struct usb_host_interface *alt;
	174	struct usb_interface *intf;
	175
	176	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
	177	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
	178	if (!alt) {
133a9fe9	179	pr_err("Couldn't get altsetting\n");
b517af72 HG	180	return -EIO;
	181	}
	182
	183	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
	184
b517af72 HG	185	n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
	186	reg_w(gspca_dev, n, 0x08);
	187
	188	konica_stream_on(gspca_dev);
	189
	190	if (gspca_dev->usb_err)
	191	return gspca_dev->usb_err;
	192
	193	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
	194	#if MAX_NURBS < 4
	195	#error "Not enough URBs in the gspca table"
	196	#endif
	197	#define SD_NPKT 32
	198	for (n = 0; n < 4; n++) {
	199	i = n & 1 ? 0 : 1;
	200	packet_size =
	201	le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
	202	urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
	203	if (!urb) {
133a9fe9	204	pr_err("usb_alloc_urb failed\n");
b517af72 HG	205	return -ENOMEM;
	206	}
	207	gspca_dev->urb[n] = urb;
76e241d4	208	urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
b517af72 HG	209	packet_size * SD_NPKT,
	210	GFP_KERNEL,
	211	&urb->transfer_dma);
	212	if (urb->transfer_buffer == NULL) {
133a9fe9	213	pr_err("usb_buffer_alloc failed\n");
b517af72 HG	214	return -ENOMEM;
	215	}
	216
	217	urb->dev = gspca_dev->dev;
	218	urb->context = gspca_dev;
	219	urb->transfer_buffer_length = packet_size * SD_NPKT;
	220	urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
	221	n & 1 ? 0x81 : 0x82);
	222	urb->transfer_flags = URB_ISO_ASAP
	223	\| URB_NO_TRANSFER_DMA_MAP;
	224	urb->interval = 1;
	225	urb->complete = sd_isoc_irq;
	226	urb->number_of_packets = SD_NPKT;
	227	for (i = 0; i < SD_NPKT; i++) {
	228	urb->iso_frame_desc[i].length = packet_size;
	229	urb->iso_frame_desc[i].offset = packet_size * i;
	230	}
	231	}
	232
	233	return 0;
	234	}
	235
	236	static void sd_stopN(struct gspca_dev *gspca_dev)
	237	{
	238	struct sd sd = (struct sd ) gspca_dev;
	239
	240	konica_stream_off(gspca_dev);
2856643e	241	#if defined(CONFIG_INPUT) \|\| defined(CONFIG_INPUT_MODULE)
b517af72 HG	242	/* Don't keep the button in the pressed state "forever" if it was
	243	pressed when streaming is stopped */
	244	if (sd->snapshot_pressed) {
	245	input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
	246	input_sync(gspca_dev->input_dev);
	247	sd->snapshot_pressed = 0;
	248	}
	249	#endif
	250	}
	251
	252	/* reception of an URB */
	253	static void sd_isoc_irq(struct urb *urb)
	254	{
	255	struct gspca_dev gspca_dev = (struct gspca_dev ) urb->context;
	256	struct sd sd = (struct sd ) gspca_dev;
	257	struct urb data_urb, status_urb;
	258	u8 *data;
	259	int i, st;
	260
	261	PDEBUG(D_PACK, "sd isoc irq");
	262	if (!gspca_dev->streaming)
	263	return;
	264
	265	if (urb->status != 0) {
	266	if (urb->status == -ESHUTDOWN)
	267	return; /* disconnection */
	268	#ifdef CONFIG_PM
	269	if (gspca_dev->frozen)
	270	return;
	271	#endif
	272	PDEBUG(D_ERR, "urb status: %d", urb->status);
	273	st = usb_submit_urb(urb, GFP_ATOMIC);
	274	if (st < 0)
133a9fe9	275	pr_err("resubmit urb error %d\n", st);
b517af72 HG	276	return;
	277	}
	278
	279	/* if this is a data URB (ep 0x82), wait */
	280	if (urb->transfer_buffer_length > 32) {
	281	sd->last_data_urb = urb;
	282	return;
	283	}
	284
	285	status_urb = urb;
	286	data_urb = sd->last_data_urb;
	287	sd->last_data_urb = NULL;
	288
	289	if (!data_urb \|\| data_urb->start_frame != status_urb->start_frame) {
	290	PDEBUG(D_ERR\|D_PACK, "lost sync on frames");
	291	goto resubmit;
	292	}
	293
	294	if (data_urb->number_of_packets != status_urb->number_of_packets) {
	295	PDEBUG(D_ERR\|D_PACK,
	296	"no packets does not match, data: %d, status: %d",
	297	data_urb->number_of_packets,
	298	status_urb->number_of_packets);
	299	goto resubmit;
	300	}
	301
	302	for (i = 0; i < status_urb->number_of_packets; i++) {
	303	if (data_urb->iso_frame_desc[i].status \|\|
	304	status_urb->iso_frame_desc[i].status) {
	305	PDEBUG(D_ERR\|D_PACK,
	306	"pkt %d data-status %d, status-status %d", i,
	307	data_urb->iso_frame_desc[i].status,
	308	status_urb->iso_frame_desc[i].status);
	309	gspca_dev->last_packet_type = DISCARD_PACKET;
	310	continue;
	311	}
	312
	313	if (status_urb->iso_frame_desc[i].actual_length != 1) {
	314	PDEBUG(D_ERR\|D_PACK,
	315	"bad status packet length %d",
	316	status_urb->iso_frame_desc[i].actual_length);
	317	gspca_dev->last_packet_type = DISCARD_PACKET;
	318	continue;
	319	}
	320
	321	st = ((u8 )status_urb->transfer_buffer
	322	+ status_urb->iso_frame_desc[i].offset);
	323
	324	data = (u8 *)data_urb->transfer_buffer
	325	+ data_urb->iso_frame_desc[i].offset;
	326
	327	/* st: 0x80-0xff: frame start with frame number (ie 0-7f)
	328	* otherwise:
	329	* bit 0 0: keep packet
	330	* 1: drop packet (padding data)
	331	*
	332	* bit 4 0 button not clicked
	333	* 1 button clicked
	334	* button is used to `take a picture' (in software)
	335	*/
	336	if (st & 0x80) {
	337	gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
	338	gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
	339	} else {
2856643e	340	#if defined(CONFIG_INPUT) \|\| defined(CONFIG_INPUT_MODULE)
b517af72 HG	341	u8 button_state = st & 0x40 ? 1 : 0;
	342	if (sd->snapshot_pressed != button_state) {
	343	input_report_key(gspca_dev->input_dev,
	344	KEY_CAMERA,
	345	button_state);
	346	input_sync(gspca_dev->input_dev);
	347	sd->snapshot_pressed = button_state;
	348	}
	349	#endif
	350	if (st & 0x01)
	351	continue;
	352	}
	353	gspca_frame_add(gspca_dev, INTER_PACKET, data,
	354	data_urb->iso_frame_desc[i].actual_length);
	355	}
	356
	357	resubmit:
	358	if (data_urb) {
	359	st = usb_submit_urb(data_urb, GFP_ATOMIC);
	360	if (st < 0)
	361	PDEBUG(D_ERR\|D_PACK,
	362	"usb_submit_urb(data_urb) ret %d", st);
	363	}
	364	st = usb_submit_urb(status_urb, GFP_ATOMIC);
	365	if (st < 0)
133a9fe9	366	pr_err("usb_submit_urb(status_urb) ret %d\n", st);
b517af72 HG	367	}
b517af72 HG	368
1bdee422	369	static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
b517af72	370	{
1bdee422 HV	371	struct gspca_dev *gspca_dev =
1bdee422 HV	372	container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
b517af72	373
1bdee422	374	gspca_dev->usb_err = 0;
b517af72	375
1bdee422 HV	376	if (!gspca_dev->streaming)
1bdee422 HV	377	return 0;
b517af72	378
1bdee422 HV	379	switch (ctrl->id) {
1bdee422 HV	380	case V4L2_CID_BRIGHTNESS:
b517af72	381	konica_stream_off(gspca_dev);
1bdee422	382	reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
b517af72	383	konica_stream_on(gspca_dev);
1bdee422 HV	384	break;
1bdee422 HV	385	case V4L2_CID_CONTRAST:
b517af72	386	konica_stream_off(gspca_dev);
1bdee422	387	reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
b517af72	388	konica_stream_on(gspca_dev);
1bdee422 HV	389	break;
1bdee422 HV	390	case V4L2_CID_SATURATION:
b517af72	391	konica_stream_off(gspca_dev);
1bdee422	392	reg_w(gspca_dev, ctrl->val, SATURATION_REG);
b517af72	393	konica_stream_on(gspca_dev);
1bdee422 HV	394	break;
1bdee422 HV	395	case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
b517af72	396	konica_stream_off(gspca_dev);
1bdee422	397	reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
b517af72	398	konica_stream_on(gspca_dev);
1bdee422 HV	399	break;
	400	case V4L2_CID_SHARPNESS:
	401	konica_stream_off(gspca_dev);
	402	reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
	403	konica_stream_on(gspca_dev);
	404	break;
b517af72	405	}
1bdee422	406	return gspca_dev->usb_err;
b517af72 HG	407	}
b517af72 HG	408
1bdee422 HV	409	static const struct v4l2_ctrl_ops sd_ctrl_ops = {
	410	.s_ctrl = sd_s_ctrl,
	411	};
b517af72	412
1bdee422 HV	413	static int sd_init_controls(struct gspca_dev *gspca_dev)
	414	{
	415	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
	416
	417	gspca_dev->vdev.ctrl_handler = hdl;
	418	v4l2_ctrl_handler_init(hdl, 5);
	419	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	420	V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
	421	/* Needs to be verified */
	422	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	423	V4L2_CID_CONTRAST, 0, 9, 1, 4);
	424	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	425	V4L2_CID_SATURATION, 0, 9, 1, 4);
	426	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	427	V4L2_CID_WHITE_BALANCE_TEMPERATURE,
	428	0, 33, 1, 25);
	429	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	430	V4L2_CID_SHARPNESS, 0, 9, 1, 4);
	431
	432	if (hdl->error) {
	433	pr_err("Could not initialize controls\n");
	434	return hdl->error;
	435	}
b517af72 HG	436	return 0;
	437	}
	438
	439	/* sub-driver description */
	440	static const struct sd_desc sd_desc = {
	441	.name = MODULE_NAME,
b517af72 HG	442	.config = sd_config,
b517af72 HG	443	.init = sd_init,
1bdee422	444	.init_controls = sd_init_controls,
b517af72 HG	445	.start = sd_start,
b517af72 HG	446	.stopN = sd_stopN,
2856643e	447	#if defined(CONFIG_INPUT) \|\| defined(CONFIG_INPUT_MODULE)
b517af72 HG	448	.other_input = 1,
	449	#endif
	450	};
	451
	452	/* -- module initialisation -- */
95c967c1	453	static const struct usb_device_id device_table[] = {
b517af72 HG	454	{USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
	455	{}
	456	};
	457	MODULE_DEVICE_TABLE(usb, device_table);
	458
	459	/* -- device connect -- */
	460	static int sd_probe(struct usb_interface *intf,
	461	const struct usb_device_id *id)
	462	{
	463	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	464	THIS_MODULE);
	465	}
	466
	467	static struct usb_driver sd_driver = {
	468	.name = MODULE_NAME,
	469	.id_table = device_table,
	470	.probe = sd_probe,
	471	.disconnect = gspca_disconnect,
	472	#ifdef CONFIG_PM
	473	.suspend = gspca_suspend,
	474	.resume = gspca_resume,
	475	#endif
	476	};
	477
ecb3b2b3	478	module_usb_driver(sd_driver);