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|
/*
* 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;
}
if (alt->desc.bNumEndpoints < 2)
return -ENODEV;
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 */
st
|