[mirror_ubuntu-artful-kernel.git] / drivers / media / usb / 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.
 */

#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 writing %02x to %02x: %d\n",
		       value, index, 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_r 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)
{
	int i;

	/*
	 * The konica needs a freaking large time to "boot" (approx 6.5 sec.),
	 * and does not want to be bothered while doing so :|
	 * Register 0x10 counts from 1 - 3, with 3 being "ready"
	 */
	msleep(6000);
	for (i = 0; i < 20; i++) {
		reg_r(gspca_dev, 0, 0x10);
		if (gspca_dev->usb_buf[0] == 3)
			break;
		msleep(100);
	}
	reg_w(gspca_dev, 0, 0x0d);

	return gspca_dev->usb_err;
}

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)
			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 __maybe_unused = (struct sd *) gspca_dev;

	konica_stream_off(gspca_dev);
#if IS_ENABLED(CONFIG_INPUT)
	/* 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
		PERR("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) {
		PERR("lost sync on frames");
		goto resubmit;
	}

	if (data_urb->number_of_packets != status_urb->number_of_packets) {
		PERR("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) {
			PERR("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) {
			PERR("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 IS_ENABLED(CONFIG_INPUT)
			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)
			PERR("usb_submit_urb(data_urb) ret %d", st);
	}
	st = usb_submit_urb(status_urb, GFP_ATOMIC);
	if (st < 0)
		PERR("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 IS_ENABLED(CONFIG_INPUT)
	.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,
	.reset_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.
b517af72 HG	25	*/
b517af72 HG	26
133a9fe9 JP	27	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
133a9fe9 JP	28
b517af72 HG	29	#define MODULE_NAME "konica"
	30
	31	#include <linux/input.h>
	32	#include "gspca.h"
	33
	34	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	35	MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
	36	MODULE_LICENSE("GPL");
	37
	38	#define WHITEBAL_REG 0x01
	39	#define BRIGHTNESS_REG 0x02
	40	#define SHARPNESS_REG 0x03
	41	#define CONTRAST_REG 0x04
	42	#define SATURATION_REG 0x05
	43
	44	/* specific webcam descriptor */
	45	struct sd {
	46	struct gspca_dev gspca_dev; /* !! must be the first item */
	47	struct urb *last_data_urb;
	48	u8 snapshot_pressed;
b517af72 HG	49	};
b517af72 HG	50
b517af72 HG	51
	52	/* .priv is what goes to register 8 for this mode, known working values:
	53	0x00 -> 176x144, cropped
	54	0x01 -> 176x144, cropped
	55	0x02 -> 176x144, cropped
	56	0x03 -> 176x144, cropped
	57	0x04 -> 176x144, binned
	58	0x05 -> 320x240
	59	0x06 -> 320x240
	60	0x07 -> 160x120, cropped
	61	0x08 -> 160x120, cropped
	62	0x09 -> 160x120, binned (note has 136 lines)
	63	0x0a -> 160x120, binned (note has 136 lines)
	64	0x0b -> 160x120, cropped
	65	*/
	66	static const struct v4l2_pix_format vga_mode[] = {
	67	{160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
	68	.bytesperline = 160,
	69	.sizeimage = 160 * 136 * 3 / 2 + 960,
	70	.colorspace = V4L2_COLORSPACE_SRGB,
	71	.priv = 0x0a},
	72	{176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
	73	.bytesperline = 176,
	74	.sizeimage = 176 * 144 * 3 / 2 + 960,
	75	.colorspace = V4L2_COLORSPACE_SRGB,
	76	.priv = 0x04},
	77	{320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
	78	.bytesperline = 320,
	79	.sizeimage = 320 * 240 * 3 / 2 + 960,
	80	.colorspace = V4L2_COLORSPACE_SRGB,
	81	.priv = 0x05},
	82	};
	83
	84	static void sd_isoc_irq(struct urb *urb);
	85
	86	static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
	87	{
	88	struct usb_device *dev = gspca_dev->dev;
	89	int ret;
	90
	91	if (gspca_dev->usb_err < 0)
	92	return;
	93	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	94	0x02,
	95	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	96	value,
	97	index,
	98	NULL,
	99	0,
	100	1000);
	101	if (ret < 0) {
e163609e HG	102	pr_err("reg_w err writing %02x to %02x: %d\n",
e163609e HG	103	value, index, ret);
b517af72 HG	104	gspca_dev->usb_err = ret;
	105	}
	106	}
	107
	108	static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
	109	{
	110	struct usb_device *dev = gspca_dev->dev;
	111	int ret;
	112
	113	if (gspca_dev->usb_err < 0)
	114	return;
	115	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	116	0x03,
	117	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	118	value,
	119	index,
	120	gspca_dev->usb_buf,
	121	2,
	122	1000);
	123	if (ret < 0) {
e163609e	124	pr_err("reg_r err %d\n", ret);
b517af72 HG	125	gspca_dev->usb_err = ret;
	126	}
	127	}
	128
	129	static void konica_stream_on(struct gspca_dev *gspca_dev)
	130	{
	131	reg_w(gspca_dev, 1, 0x0b);
	132	}
	133
	134	static void konica_stream_off(struct gspca_dev *gspca_dev)
	135	{
	136	reg_w(gspca_dev, 0, 0x0b);
	137	}
	138
	139	/* this function is called at probe time */
	140	static int sd_config(struct gspca_dev *gspca_dev,
	141	const struct usb_device_id *id)
	142	{
b517af72 HG	143	gspca_dev->cam.cam_mode = vga_mode;
	144	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
	145	gspca_dev->cam.no_urb_create = 1;
b517af72	146
b517af72 HG	147	return 0;
	148	}
	149
	150	/* this function is called at probe and resume time */
	151	static int sd_init(struct gspca_dev *gspca_dev)
	152	{
e163609e HG	153	int i;
	154
	155	/*
	156	* The konica needs a freaking large time to "boot" (approx 6.5 sec.),
	157	* and does not want to be bothered while doing so :\|
	158	* Register 0x10 counts from 1 - 3, with 3 being "ready"
	159	*/
	160	msleep(6000);
	161	for (i = 0; i < 20; i++) {
	162	reg_r(gspca_dev, 0, 0x10);
	163	if (gspca_dev->usb_buf[0] == 3)
	164	break;
	165	msleep(100);
	166	}
b517af72 HG	167	reg_w(gspca_dev, 0, 0x0d);
b517af72 HG	168
e163609e	169	return gspca_dev->usb_err;
b517af72 HG	170	}
	171
	172	static int sd_start(struct gspca_dev *gspca_dev)
	173	{
	174	struct sd sd = (struct sd ) gspca_dev;
	175	struct urb *urb;
	176	int i, n, packet_size;
	177	struct usb_host_interface *alt;
	178	struct usb_interface *intf;
	179
	180	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
	181	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
	182	if (!alt) {
133a9fe9	183	pr_err("Couldn't get altsetting\n");
b517af72 HG	184	return -EIO;
	185	}
	186
	187	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
	188
b517af72 HG	189	n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
	190	reg_w(gspca_dev, n, 0x08);
	191
	192	konica_stream_on(gspca_dev);
	193
	194	if (gspca_dev->usb_err)
	195	return gspca_dev->usb_err;
	196
	197	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
	198	#if MAX_NURBS < 4
	199	#error "Not enough URBs in the gspca table"
	200	#endif
	201	#define SD_NPKT 32
	202	for (n = 0; n < 4; n++) {
	203	i = n & 1 ? 0 : 1;
	204	packet_size =
	205	le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
	206	urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
de46bfab	207	if (!urb)
b517af72	208	return -ENOMEM;
b517af72	209	gspca_dev->urb[n] = urb;
76e241d4	210	urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
b517af72 HG	211	packet_size * SD_NPKT,
	212	GFP_KERNEL,
	213	&urb->transfer_dma);
	214	if (urb->transfer_buffer == NULL) {
133a9fe9	215	pr_err("usb_buffer_alloc failed\n");
b517af72 HG	216	return -ENOMEM;
	217	}
	218
	219	urb->dev = gspca_dev->dev;
	220	urb->context = gspca_dev;
	221	urb->transfer_buffer_length = packet_size * SD_NPKT;
	222	urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
	223	n & 1 ? 0x81 : 0x82);
	224	urb->transfer_flags = URB_ISO_ASAP
	225	\| URB_NO_TRANSFER_DMA_MAP;
	226	urb->interval = 1;
	227	urb->complete = sd_isoc_irq;
	228	urb->number_of_packets = SD_NPKT;
	229	for (i = 0; i < SD_NPKT; i++) {
	230	urb->iso_frame_desc[i].length = packet_size;
	231	urb->iso_frame_desc[i].offset = packet_size * i;
	232	}
	233	}
	234
	235	return 0;
	236	}
	237
	238	static void sd_stopN(struct gspca_dev *gspca_dev)
	239	{
d7e92e15	240	struct sd sd __maybe_unused = (struct sd ) gspca_dev;
b517af72 HG	241
b517af72 HG	242	konica_stream_off(gspca_dev);
9bc04463	243	#if IS_ENABLED(CONFIG_INPUT)
b517af72 HG	244	/* Don't keep the button in the pressed state "forever" if it was
	245	pressed when streaming is stopped */
	246	if (sd->snapshot_pressed) {
	247	input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
	248	input_sync(gspca_dev->input_dev);
	249	sd->snapshot_pressed = 0;
	250	}
	251	#endif
	252	}
	253
	254	/* reception of an URB */
	255	static void sd_isoc_irq(struct urb *urb)
	256	{
	257	struct gspca_dev gspca_dev = (struct gspca_dev ) urb->context;
	258	struct sd sd = (struct sd ) gspca_dev;
	259	struct urb data_urb, status_urb;
	260	u8 *data;
	261	int i, st;
	262
	263	PDEBUG(D_PACK, "sd isoc irq");
	264	if (!gspca_dev->streaming)
	265	return;
	266
	267	if (urb->status != 0) {
	268	if (urb->status == -ESHUTDOWN)
	269	return; /* disconnection */
	270	#ifdef CONFIG_PM
	271	if (gspca_dev->frozen)
	272	return;
	273	#endif
c93396e1	274	PERR("urb status: %d", urb->status);
b517af72 HG	275	st = usb_submit_urb(urb, GFP_ATOMIC);
b517af72 HG	276	if (st < 0)
133a9fe9	277	pr_err("resubmit urb error %d\n", st);
b517af72 HG	278	return;
	279	}
	280
	281	/* if this is a data URB (ep 0x82), wait */
	282	if (urb->transfer_buffer_length > 32) {
	283	sd->last_data_urb = urb;
	284	return;
	285	}
	286
	287	status_urb = urb;
	288	data_urb = sd->last_data_urb;
	289	sd->last_data_urb = NULL;
	290
	291	if (!data_urb \|\| data_urb->start_frame != status_urb->start_frame) {
c93396e1	292	PERR("lost sync on frames");
b517af72 HG	293	goto resubmit;
	294	}
	295
	296	if (data_urb->number_of_packets != status_urb->number_of_packets) {
c93396e1 TK	297	PERR("no packets does not match, data: %d, status: %d",
	298	data_urb->number_of_packets,
	299	status_urb->number_of_packets);
b517af72 HG	300	goto resubmit;
	301	}
	302
	303	for (i = 0; i < status_urb->number_of_packets; i++) {
	304	if (data_urb->iso_frame_desc[i].status \|\|
	305	status_urb->iso_frame_desc[i].status) {
c93396e1 TK	306	PERR("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);
b517af72 HG	309	gspca_dev->last_packet_type = DISCARD_PACKET;
	310	continue;
	311	}
	312
	313	if (status_urb->iso_frame_desc[i].actual_length != 1) {
c93396e1 TK	314	PERR("bad status packet length %d",
c93396e1 TK	315	status_urb->iso_frame_desc[i].actual_length);
b517af72 HG	316	gspca_dev->last_packet_type = DISCARD_PACKET;
	317	continue;
	318	}
	319
	320	st = ((u8 )status_urb->transfer_buffer
	321	+ status_urb->iso_frame_desc[i].offset);
	322
	323	data = (u8 *)data_urb->transfer_buffer
	324	+ data_urb->iso_frame_desc[i].offset;
	325
	326	/* st: 0x80-0xff: frame start with frame number (ie 0-7f)
	327	* otherwise:
	328	* bit 0 0: keep packet
	329	* 1: drop packet (padding data)
	330	*
	331	* bit 4 0 button not clicked
	332	* 1 button clicked
	333	* button is used to `take a picture' (in software)
	334	*/
	335	if (st & 0x80) {
	336	gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
	337	gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
	338	} else {
9bc04463	339	#if IS_ENABLED(CONFIG_INPUT)
b517af72 HG	340	u8 button_state = st & 0x40 ? 1 : 0;
	341	if (sd->snapshot_pressed != button_state) {
	342	input_report_key(gspca_dev->input_dev,
	343	KEY_CAMERA,
	344	button_state);
	345	input_sync(gspca_dev->input_dev);
	346	sd->snapshot_pressed = button_state;
	347	}
	348	#endif
	349	if (st & 0x01)
	350	continue;
	351	}
	352	gspca_frame_add(gspca_dev, INTER_PACKET, data,
	353	data_urb->iso_frame_desc[i].actual_length);
	354	}
	355
	356	resubmit:
	357	if (data_urb) {
	358	st = usb_submit_urb(data_urb, GFP_ATOMIC);
	359	if (st < 0)
c93396e1	360	PERR("usb_submit_urb(data_urb) ret %d", st);
b517af72 HG	361	}
	362	st = usb_submit_urb(status_urb, GFP_ATOMIC);
	363	if (st < 0)
c93396e1	364	PERR("usb_submit_urb(status_urb) ret %d\n", st);
b517af72 HG	365	}
b517af72 HG	366
1bdee422	367	static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
b517af72	368	{
1bdee422 HV	369	struct gspca_dev *gspca_dev =
1bdee422 HV	370	container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
b517af72	371
1bdee422	372	gspca_dev->usb_err = 0;
b517af72	373
1bdee422 HV	374	if (!gspca_dev->streaming)
1bdee422 HV	375	return 0;
b517af72	376
1bdee422 HV	377	switch (ctrl->id) {
1bdee422 HV	378	case V4L2_CID_BRIGHTNESS:
b517af72	379	konica_stream_off(gspca_dev);
1bdee422	380	reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
b517af72	381	konica_stream_on(gspca_dev);
1bdee422 HV	382	break;
1bdee422 HV	383	case V4L2_CID_CONTRAST:
b517af72	384	konica_stream_off(gspca_dev);
1bdee422	385	reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
b517af72	386	konica_stream_on(gspca_dev);
1bdee422 HV	387	break;
1bdee422 HV	388	case V4L2_CID_SATURATION:
b517af72	389	konica_stream_off(gspca_dev);
1bdee422	390	reg_w(gspca_dev, ctrl->val, SATURATION_REG);
b517af72	391	konica_stream_on(gspca_dev);
1bdee422 HV	392	break;
1bdee422 HV	393	case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
b517af72	394	konica_stream_off(gspca_dev);
1bdee422	395	reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
b517af72	396	konica_stream_on(gspca_dev);
1bdee422 HV	397	break;
	398	case V4L2_CID_SHARPNESS:
	399	konica_stream_off(gspca_dev);
	400	reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
	401	konica_stream_on(gspca_dev);
	402	break;
b517af72	403	}
1bdee422	404	return gspca_dev->usb_err;
b517af72 HG	405	}
b517af72 HG	406
1bdee422 HV	407	static const struct v4l2_ctrl_ops sd_ctrl_ops = {
	408	.s_ctrl = sd_s_ctrl,
	409	};
b517af72	410
1bdee422 HV	411	static int sd_init_controls(struct gspca_dev *gspca_dev)
	412	{
	413	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
	414
	415	gspca_dev->vdev.ctrl_handler = hdl;
	416	v4l2_ctrl_handler_init(hdl, 5);
	417	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	418	V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
	419	/* Needs to be verified */
	420	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	421	V4L2_CID_CONTRAST, 0, 9, 1, 4);
	422	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	423	V4L2_CID_SATURATION, 0, 9, 1, 4);
	424	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	425	V4L2_CID_WHITE_BALANCE_TEMPERATURE,
	426	0, 33, 1, 25);
	427	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
	428	V4L2_CID_SHARPNESS, 0, 9, 1, 4);
	429
	430	if (hdl->error) {
	431	pr_err("Could not initialize controls\n");
	432	return hdl->error;
	433	}
b517af72 HG	434	return 0;
	435	}
	436
	437	/* sub-driver description */
	438	static const struct sd_desc sd_desc = {
	439	.name = MODULE_NAME,
b517af72 HG	440	.config = sd_config,
b517af72 HG	441	.init = sd_init,
1bdee422	442	.init_controls = sd_init_controls,
b517af72 HG	443	.start = sd_start,
b517af72 HG	444	.stopN = sd_stopN,
9bc04463	445	#if IS_ENABLED(CONFIG_INPUT)
b517af72 HG	446	.other_input = 1,
	447	#endif
	448	};
	449
	450	/* -- module initialisation -- */
95c967c1	451	static const struct usb_device_id device_table[] = {
b517af72 HG	452	{USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
	453	{}
	454	};
	455	MODULE_DEVICE_TABLE(usb, device_table);
	456
	457	/* -- device connect -- */
	458	static int sd_probe(struct usb_interface *intf,
	459	const struct usb_device_id *id)
	460	{
	461	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
	462	THIS_MODULE);
	463	}
	464
	465	static struct usb_driver sd_driver = {
	466	.name = MODULE_NAME,
	467	.id_table = device_table,
	468	.probe = sd_probe,
	469	.disconnect = gspca_disconnect,
	470	#ifdef CONFIG_PM
	471	.suspend = gspca_suspend,
	472	.resume = gspca_resume,
8bb58964	473	.reset_resume = gspca_resume,
b517af72 HG	474	#endif
	475	};
	476
ecb3b2b3	477	module_usb_driver(sd_driver);