- 根目录:
- drivers
- media
- usb
- gspca
- spca1528.c
/*
* spca1528 subdriver
*
* Copyright (C) 2010-2011 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 "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,
0x0000, /* value */
index,
gspca_dev->usb_buf, len,
500);
PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", req, index,
gspca_dev->usb_buf[0]);
if (ret < 0) {
pr_err("reg_r err %d\n", ret);
gspca_dev->usb_err = ret;
}
}
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;
PDEBUG(D_USBO, "SET %02x %04x %04x", 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;
PDEBUG(D_USBO, "SET %02x %04x %04x %02x", 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, 0x21, 0x0000, 1);
if (gspca_dev->usb_buf[0] == 0)
return;
w += 15;
msleep(w);
} while (--i > 0);
PERR("wait_status_0 timeout");
gspca_dev->usb_err = -ETIME;
}
static void wait_status_1(struct gspca_dev *gspca_dev)
{
int i;
i = 10;
do {
reg_r(gspca_dev, 0x21, 0x0001, 1);
msleep(10);
if (gspca_dev->usb_buf[0] == 1) {
reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00);
reg_r(gspca_dev, 0x21, 0x0001, 1);
return;
}
} while (--i > 0);
PERR("wait_status_1 timeout");
gspca_dev->usb_err = -ETIME;
}
static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val);
}
static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val);
}
static void sethue(struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val);
}
static void setcolor(struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val);
}
static void setsharpness(struct gspca_dev *gspca_dev, s32 val)
{
reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, 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, 0x00, 0x0001, 0x2067);
reg_w(gspca_dev, 0x00, 0x00d0, 0x206b);
reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
msleep(8);
reg_w(gspca_dev, 0x00, 0x00c0, 0x206b);
reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
reg_r(gspca_dev, 0x20, 0x0000, 1);
reg_r(gspca_dev, 0x20, 0x0000, 5);
reg_r(gspca_dev, 0x23, 0x0000, 64);
PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c],
&gspca_dev->usb_buf[0x30]);
reg_r(gspca_dev, 0x23, 0x0001, 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, 0x00, 0x2520, 1);
wait_status_0(gspca_dev);
reg_w(gspca_dev, 0xc5, 0x0003, 0x0000);
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, 0x25, 0x0000, 0x0004, mode);
reg_r(gspca_dev, 0x25, 0x0004, 1);
reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06); /* 420 */
reg_r(gspca_dev, 0x27, 0x0000, 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->height, gspca_dev->width,
0x22); /* JPEG 411 */
/* the JPEG quality shall be 85% */
jpeg_set_qual(sd->jpeg_hdr, 85);
reg_r(gspca_dev, 0x00, 0x2520, 1);
msleep(8);
/* start the capture */
wait_status_0(gspca_dev);
reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* 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, 0x31, 0x0000, 0x0000); /* 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] == 0xff) {
gspca_frame_add(gspca_dev, INTER_PACKET,
data, i + 1);
len -= i;
data += i;
*data = 0x00;
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[] = {0xff, 0xd9};
/* 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 == 0x02) {
if (data[1] & 0x02) {
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(0x04fc, 0x1528)},
{}
};
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);