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linux/drivers/media/usb/gspca/benq.c
Thomas Gleixner fd9871f70c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 50 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154042.917228456@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 11:52:39 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Benq DC E300 subdriver
*
* Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "benq"
#include "gspca.h"
MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
MODULE_DESCRIPTION("Benq DC E300 USB Camera Driver");
MODULE_LICENSE("GPL");
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
};
static const struct v4l2_pix_format vga_mode[] = {
{320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
.bytesperline = 320,
.sizeimage = 320 * 240 * 3 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG},
};
static void sd_isoc_irq(struct urb *urb);
/* -- write a register -- */
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,
500);
if (ret < 0) {
pr_err("reg_w err %d\n", ret);
gspca_dev->usb_err = ret;
}
}
/* 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)
{
return 0;
}
/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
struct urb *urb;
int i, n;
/* 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_PKT_SZ 64
#define SD_NPKT 32
for (n = 0; n < 4; n++) {
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,
SD_PKT_SZ * SD_NPKT,
GFP_KERNEL,
&urb->transfer_dma);
if (urb->transfer_buffer == NULL) {
pr_err("usb_alloc_coherent failed\n");
return -ENOMEM;
}
urb->dev = gspca_dev->dev;
urb->context = gspca_dev;
urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT;
urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
n & 1 ? 0x82 : 0x83);
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 = SD_PKT_SZ;
urb->iso_frame_desc[i].offset = SD_PKT_SZ * i;
}
}
return gspca_dev->usb_err;
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
struct usb_interface *intf;
reg_w(gspca_dev, 0x003c, 0x0003);
reg_w(gspca_dev, 0x003c, 0x0004);
reg_w(gspca_dev, 0x003c, 0x0005);
reg_w(gspca_dev, 0x003c, 0x0006);
reg_w(gspca_dev, 0x003c, 0x0007);
intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
usb_set_interface(gspca_dev->dev, gspca_dev->iface,
intf->num_altsetting - 1);
}
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* isoc packet */
int len) /* iso packet length */
{
/* unused */
}
/* reception of an URB */
static void sd_isoc_irq(struct urb *urb)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
struct urb *urb0;
u8 *data;
int i, st;
gspca_dbg(gspca_dev, D_PACK, "sd isoc irq\n");
if (!gspca_dev->streaming)
return;
if (urb->status != 0) {
if (urb->status == -ESHUTDOWN)
return; /* disconnection */
#ifdef CONFIG_PM
if (gspca_dev->frozen)
return;
#endif
pr_err("urb status: %d\n", urb->status);
return;
}
/* if this is a control URN (ep 0x83), wait */
if (urb == gspca_dev->urb[0] || urb == gspca_dev->urb[2])
return;
/* scan both received URBs */
if (urb == gspca_dev->urb[1])
urb0 = gspca_dev->urb[0];
else
urb0 = gspca_dev->urb[2];
for (i = 0; i < urb->number_of_packets; i++) {
/* check the packet status and length */
if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ
|| urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) {
gspca_err(gspca_dev, "ISOC bad lengths %d / %d\n",
urb0->iso_frame_desc[i].actual_length,
urb->iso_frame_desc[i].actual_length);
gspca_dev->last_packet_type = DISCARD_PACKET;
continue;
}
st = urb0->iso_frame_desc[i].status;
if (st == 0)
st = urb->iso_frame_desc[i].status;
if (st) {
pr_err("ISOC data error: [%d] status=%d\n",
i, st);
gspca_dev->last_packet_type = DISCARD_PACKET;
continue;
}
/*
* The images are received in URBs of different endpoints
* (0x83 and 0x82).
* Image pieces in URBs of ep 0x83 are continuated in URBs of
* ep 0x82 of the same index.
* The packets in the URBs of endpoint 0x83 start with:
* - 80 ba/bb 00 00 = start of image followed by 'ff d8'
* - 04 ba/bb oo oo = image piece
* where 'oo oo' is the image offset
(not checked)
* - (other -> bad frame)
* The images are JPEG encoded with full header and
* normal ff escape.
* The end of image ('ff d9') may occur in any URB.
* (not checked)
*/
data = (u8 *) urb0->transfer_buffer
+ urb0->iso_frame_desc[i].offset;
if (data[0] == 0x80 && (data[1] & 0xfe) == 0xba) {
/* new image */
gspca_frame_add(gspca_dev, LAST_PACKET,
NULL, 0);
gspca_frame_add(gspca_dev, FIRST_PACKET,
data + 4, SD_PKT_SZ - 4);
} else if (data[0] == 0x04 && (data[1] & 0xfe) == 0xba) {
gspca_frame_add(gspca_dev, INTER_PACKET,
data + 4, SD_PKT_SZ - 4);
} else {
gspca_dev->last_packet_type = DISCARD_PACKET;
continue;
}
data = (u8 *) urb->transfer_buffer
+ urb->iso_frame_desc[i].offset;
gspca_frame_add(gspca_dev, INTER_PACKET,
data, SD_PKT_SZ);
}
/* resubmit the URBs */
st = usb_submit_urb(urb0, GFP_ATOMIC);
if (st < 0)
pr_err("usb_submit_urb(0) ret %d\n", st);
st = usb_submit_urb(urb, GFP_ATOMIC);
if (st < 0)
pr_err("usb_submit_urb() ret %d\n", st);
}
/* 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,
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(0x04a5, 0x3035)},
{}
};
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);
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