// SPDX-License-Identifier: GPL-2.0-or-later
/*
* spca1528 subdriver
*
* Copyright (C) 2010-2011 Jean-Francois Moine (http://moinejf.free.fr)
*/
#define pr_fmt(fmt) KBUILD_MODNAME
": " fmt
#define MODULE_NAME
"spca1528"
#include "gspca.h"
#include "jpeg.h"
MODULE_AUTHOR(
"Jean-Francois Moine <http://moinejf.free.fr >");
MODULE_DESCRIPTION(
"SPCA1528 USB Camera Driver" );
MODULE_LICENSE(
"GPL" );
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev;
/* !! must be the first item */
u8 pkt_seq;
u8 jpeg_hdr[JPEG_HDR_SZ];
};
static const struct v4l2_pix_format vga_mode[] = {
/* (does not work correctly)
{176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
.bytesperline = 176,
.sizeimage = 176 * 144 * 5 / 8 + 590,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 3},
*/
{
320 ,
240 , V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
.bytesperline =
320 ,
.sizeimage =
320 *
240 *
4 /
8 +
590 ,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv =
2 },
{
640 ,
480 , V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
.bytesperline =
640 ,
.sizeimage =
640 *
480 *
3 /
8 +
590 ,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv =
1 },
};
/* read <len> bytes to gspca usb_buf */
static void reg_r(
struct gspca_dev *gspca_dev,
u8 req,
u16 index,
int len)
{
#if USB_BUF_SZ <
64
#error "USB buffer too small"
#endif
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 ),
req,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0 x0000,
/* value */
index,
gspca_dev->usb_buf, len,
500 );
gspca_dbg(gspca_dev, D_USBI,
"GET %02x 0000 %04x %02x\n" , req, index,
gspca_dev->usb_buf[
0 ]);
if (ret <
0 ) {
pr_err(
"reg_r err %d\n" , ret);
gspca_dev->usb_err = ret;
/*
* Make sure the buffer is zeroed to avoid uninitialized
* values.
*/
memset(gspca_dev->usb_buf,
0 , USB_BUF_SZ);
}
}
static void reg_w(
struct gspca_dev *gspca_dev,
u8 req,
u16 value,
u16 index)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
if (gspca_dev->usb_err <
0 )
return ;
gspca_dbg(gspca_dev, D_USBO,
"SET %02x %04x %04x\n" , req, value, index);
ret = usb_control_msg(dev, usb_sndctrlpipe(dev,
0 ),
req,
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;
}
}
static void reg_wb(
struct gspca_dev *gspca_dev,
u8 req,
u16 value,
u16 index,
u8 byte)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
if (gspca_dev->usb_err <
0 )
return ;
gspca_dbg(gspca_dev, D_USBO,
"SET %02x %04x %04x %02x\n" ,
req, value, index, byte);
gspca_dev->usb_buf[
0 ] = byte;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev,
0 ),
req,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, index,
gspca_dev->usb_buf,
1 ,
500 );
if (ret <
0 ) {
pr_err(
"reg_w err %d\n" , ret);
gspca_dev->usb_err = ret;
}
}
static void wait_status_0(
struct gspca_dev *gspca_dev)
{
int i, w;
i =
16 ;
w =
0 ;
do {
reg_r(gspca_dev,
0 x21,
0 x0000,
1 );
if (gspca_dev->usb_buf[
0 ] ==
0 )
return ;
w +=
15 ;
msleep(w);
}
while (--i >
0 );
gspca_err(gspca_dev,
"wait_status_0 timeout\n" );
gspca_dev->usb_err = -ETIME;
}
static void wait_status_1(
struct gspca_dev *gspca_dev)
{
int i;
i =
10 ;
do {
reg_r(gspca_dev,
0 x21,
0 x0001,
1 );
msleep(
10 );
if (gspca_dev->usb_buf[
0 ] ==
1 ) {
reg_wb(gspca_dev,
0 x21,
0 x0000,
0 x0001,
0 x00);
reg_r(gspca_dev,
0 x21,
0 x0001,
1 );
return ;
}
}
while (--i >
0 );
gspca_err(gspca_dev,
"wait_status_1 timeout\n" );
gspca_dev->usb_err = -ETIME;
}
static void setbrightness(
struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev,
0 xc0,
0 x0000,
0 x00c0, val);
}
static void setcontrast(
struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev,
0 xc1,
0 x0000,
0 x00c1, val);
}
static void sethue(
struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev,
0 xc2,
0 x0000,
0 x0000, val);
}
static void setcolor(
struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev,
0 xc3,
0 x0000,
0 x00c3, val);
}
static void setsharpness(
struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev,
0 xc4,
0 x0000,
0 x00c4, val);
}
/* 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.npkt =
128 ;
/* number of packets per ISOC message */
/*fixme: 256 in ms-win traces*/
return 0 ;
}
/* this function is called at probe and resume time */
static int sd_init(
struct gspca_dev *gspca_dev)
{
reg_w(gspca_dev,
0 x00,
0 x0001,
0 x2067);
reg_w(gspca_dev,
0 x00,
0 x00d0,
0 x206b);
reg_w(gspca_dev,
0 x00,
0 x0000,
0 x206c);
reg_w(gspca_dev,
0 x00,
0 x0001,
0 x2069);
msleep(
8 );
reg_w(gspca_dev,
0 x00,
0 x00c0,
0 x206b);
reg_w(gspca_dev,
0 x00,
0 x0000,
0 x206c);
reg_w(gspca_dev,
0 x00,
0 x0001,
0 x2069);
reg_r(gspca_dev,
0 x20,
0 x0000,
1 );
reg_r(gspca_dev,
0 x20,
0 x0000,
5 );
reg_r(gspca_dev,
0 x23,
0 x0000,
64 );
gspca_dbg(gspca_dev, D_PROBE,
"%s%s\n" , &gspca_dev->usb_buf[
0 x1c],
&gspca_dev->usb_buf[
0 x30]);
reg_r(gspca_dev,
0 x23,
0 x0001,
64 );
return gspca_dev->usb_err;
}
/* function called at start time before URB creation */
static int sd_isoc_init(
struct gspca_dev *gspca_dev)
{
u8 mode;
reg_r(gspca_dev,
0 x00,
0 x2520,
1 );
wait_status_0(gspca_dev);
reg_w(gspca_dev,
0 xc5,
0 x0003,
0 x0000);
wait_status_1(gspca_dev);
wait_status_0(gspca_dev);
mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
reg_wb(gspca_dev,
0 x25,
0 x0000,
0 x0004, mode);
reg_r(gspca_dev,
0 x25,
0 x0004,
1 );
reg_wb(gspca_dev,
0 x27,
0 x0000,
0 x0000,
0 x06);
/* 420 */
reg_r(gspca_dev,
0 x27,
0 x0000,
1 );
/* not useful..
gspca_dev->alt = 4; * use alternate setting 3 */
return gspca_dev->usb_err;
}
/* -- start the camera -- */
static int sd_start(
struct gspca_dev *gspca_dev)
{
struct sd *sd = (
struct sd *) gspca_dev;
/* initialize the JPEG header */
jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height,
gspca_dev->pixfmt.width,
0 x22);
/* JPEG 411 */
/* the JPEG quality shall be 85% */
jpeg_set_qual(sd->jpeg_hdr,
85 );
reg_r(gspca_dev,
0 x00,
0 x2520,
1 );
msleep(
8 );
/* start the capture */
wait_status_0(gspca_dev);
reg_w(gspca_dev,
0 x31,
0 x0000,
0 x0004);
/* start request */
wait_status_1(gspca_dev);
wait_status_0(gspca_dev);
msleep(
200 );
sd->pkt_seq =
0 ;
return gspca_dev->usb_err;
}
static void sd_stopN(
struct gspca_dev *gspca_dev)
{
/* stop the capture */
wait_status_0(gspca_dev);
reg_w(gspca_dev,
0 x31,
0 x0000,
0 x0000);
/* stop request */
wait_status_1(gspca_dev);
wait_status_0(gspca_dev);
}
/* move a packet adding 0x00 after 0xff */
static void add_packet(
struct gspca_dev *gspca_dev,
u8 *data,
int len)
{
int i;
i =
0 ;
do {
if (data[i] ==
0 xff) {
gspca_frame_add(gspca_dev, INTER_PACKET,
data, i +
1 );
len -= i;
data += i;
*data =
0 x00;
i =
0 ;
}
}
while (++i < len);
gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}
static void sd_pkt_scan(
struct gspca_dev *gspca_dev,
u8 *data,
/* isoc packet */
int len)
/* iso packet length */
{
struct sd *sd = (
struct sd *) gspca_dev;
static const u8 ffd9[] = {
0 xff,
0 xd9};
/* image packets start with:
* 02 8n
* with <n> bit:
* 0x01: even (0) / odd (1) image
* 0x02: end of image when set
*/
if (len <
3 )
return ;
/* empty packet */
if (*data ==
0 x02) {
if (data[
1 ] &
0 x02) {
sd->pkt_seq = !(data[
1 ] &
1 );
add_packet(gspca_dev, data +
2 , len -
2 );
gspca_frame_add(gspca_dev, LAST_PACKET,
ffd9,
2 );
return ;
}
if ((data[
1 ] &
1 ) != sd->pkt_seq)
goto err;
if (gspca_dev->last_packet_type == LAST_PACKET)
gspca_frame_add(gspca_dev, FIRST_PACKET,
sd->jpeg_hdr, JPEG_HDR_SZ);
add_packet(gspca_dev, data +
2 , len -
2 );
return ;
}
err:
gspca_dev->last_packet_type = DISCARD_PACKET;
}
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:
setbrightness(gspca_dev, ctrl->val);
break ;
case V4L2_CID_CONTRAST:
setcontrast(gspca_dev, ctrl->val);
break ;
case V4L2_CID_HUE:
sethue(gspca_dev, ctrl->val);
break ;
case V4L2_CID_SATURATION:
setcolor(gspca_dev, ctrl->val);
break ;
case V4L2_CID_SHARPNESS:
setsharpness(gspca_dev, ctrl->val);
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 ,
255 ,
1 ,
128 );
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_CONTRAST,
0 ,
8 ,
1 ,
1 );
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_HUE,
0 ,
255 ,
1 ,
0 );
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_SATURATION,
0 ,
8 ,
1 ,
1 );
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_SHARPNESS,
0 ,
255 ,
1 ,
0 );
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,
.isoc_init = sd_isoc_init,
.start = sd_start,
.stopN = sd_stopN,
.pkt_scan = sd_pkt_scan,
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(
0 x04fc,
0 x1528)},
{}
};
MODULE_DEVICE_TABLE(usb, device_table);
/* -- device connect -- */
static int sd_probe(
struct usb_interface *intf,
const struct usb_device_id *id)
{
/* the video interface for isochronous transfer is 1 */
if (intf->cur_altsetting->desc.bInterfaceNumber !=
1 )
return -ENODEV;
return gspca_dev_probe2(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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