446 lines
10 KiB
C
446 lines
10 KiB
C
/*
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* spca1528 subdriver
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*
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* Copyright (C) 2010-2011 Jean-Francois Moine (http://moinejf.free.fr)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#define MODULE_NAME "spca1528"
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#include "gspca.h"
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#include "jpeg.h"
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MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
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MODULE_DESCRIPTION("SPCA1528 USB Camera Driver");
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MODULE_LICENSE("GPL");
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/* specific webcam descriptor */
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struct sd {
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struct gspca_dev gspca_dev; /* !! must be the first item */
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u8 pkt_seq;
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u8 jpeg_hdr[JPEG_HDR_SZ];
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};
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static const struct v4l2_pix_format vga_mode[] = {
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/* (does not work correctly)
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{176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
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.bytesperline = 176,
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.sizeimage = 176 * 144 * 5 / 8 + 590,
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.colorspace = V4L2_COLORSPACE_JPEG,
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.priv = 3},
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*/
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{320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
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.bytesperline = 320,
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.sizeimage = 320 * 240 * 4 / 8 + 590,
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.colorspace = V4L2_COLORSPACE_JPEG,
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.priv = 2},
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{640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
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.bytesperline = 640,
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.sizeimage = 640 * 480 * 3 / 8 + 590,
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.colorspace = V4L2_COLORSPACE_JPEG,
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.priv = 1},
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};
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/* read <len> bytes to gspca usb_buf */
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static void reg_r(struct gspca_dev *gspca_dev,
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u8 req,
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u16 index,
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int len)
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{
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#if USB_BUF_SZ < 64
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#error "USB buffer too small"
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#endif
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struct usb_device *dev = gspca_dev->dev;
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int ret;
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if (gspca_dev->usb_err < 0)
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return;
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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req,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0x0000, /* value */
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index,
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gspca_dev->usb_buf, len,
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500);
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PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", req, index,
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gspca_dev->usb_buf[0]);
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if (ret < 0) {
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pr_err("reg_r err %d\n", ret);
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gspca_dev->usb_err = ret;
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}
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}
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static void reg_w(struct gspca_dev *gspca_dev,
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u8 req,
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u16 value,
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u16 index)
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{
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struct usb_device *dev = gspca_dev->dev;
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int ret;
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if (gspca_dev->usb_err < 0)
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return;
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PDEBUG(D_USBO, "SET %02x %04x %04x", req, value, index);
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ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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req,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, index,
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NULL, 0, 500);
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if (ret < 0) {
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pr_err("reg_w err %d\n", ret);
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gspca_dev->usb_err = ret;
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}
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}
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static void reg_wb(struct gspca_dev *gspca_dev,
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u8 req,
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u16 value,
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u16 index,
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u8 byte)
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{
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struct usb_device *dev = gspca_dev->dev;
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int ret;
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if (gspca_dev->usb_err < 0)
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return;
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PDEBUG(D_USBO, "SET %02x %04x %04x %02x", req, value, index, byte);
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gspca_dev->usb_buf[0] = byte;
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ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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req,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, index,
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gspca_dev->usb_buf, 1, 500);
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if (ret < 0) {
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pr_err("reg_w err %d\n", ret);
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gspca_dev->usb_err = ret;
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}
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}
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static void wait_status_0(struct gspca_dev *gspca_dev)
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{
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int i, w;
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i = 16;
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w = 0;
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do {
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reg_r(gspca_dev, 0x21, 0x0000, 1);
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if (gspca_dev->usb_buf[0] == 0)
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return;
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w += 15;
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msleep(w);
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} while (--i > 0);
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PERR("wait_status_0 timeout");
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gspca_dev->usb_err = -ETIME;
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}
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static void wait_status_1(struct gspca_dev *gspca_dev)
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{
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int i;
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i = 10;
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do {
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reg_r(gspca_dev, 0x21, 0x0001, 1);
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msleep(10);
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if (gspca_dev->usb_buf[0] == 1) {
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reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00);
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reg_r(gspca_dev, 0x21, 0x0001, 1);
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return;
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}
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} while (--i > 0);
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PERR("wait_status_1 timeout");
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gspca_dev->usb_err = -ETIME;
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}
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static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
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{
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reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val);
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}
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static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
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{
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reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val);
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}
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static void sethue(struct gspca_dev *gspca_dev, s32 val)
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{
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reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val);
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}
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static void setcolor(struct gspca_dev *gspca_dev, s32 val)
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{
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reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val);
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}
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static void setsharpness(struct gspca_dev *gspca_dev, s32 val)
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{
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reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val);
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}
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/* this function is called at probe time */
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static int sd_config(struct gspca_dev *gspca_dev,
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const struct usb_device_id *id)
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{
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gspca_dev->cam.cam_mode = vga_mode;
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gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
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gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */
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/*fixme: 256 in ms-win traces*/
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return 0;
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}
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/* this function is called at probe and resume time */
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static int sd_init(struct gspca_dev *gspca_dev)
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{
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reg_w(gspca_dev, 0x00, 0x0001, 0x2067);
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reg_w(gspca_dev, 0x00, 0x00d0, 0x206b);
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reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
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reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
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msleep(8);
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reg_w(gspca_dev, 0x00, 0x00c0, 0x206b);
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reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
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reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
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reg_r(gspca_dev, 0x20, 0x0000, 1);
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reg_r(gspca_dev, 0x20, 0x0000, 5);
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reg_r(gspca_dev, 0x23, 0x0000, 64);
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PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c],
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&gspca_dev->usb_buf[0x30]);
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reg_r(gspca_dev, 0x23, 0x0001, 64);
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return gspca_dev->usb_err;
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}
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/* function called at start time before URB creation */
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static int sd_isoc_init(struct gspca_dev *gspca_dev)
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{
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u8 mode;
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reg_r(gspca_dev, 0x00, 0x2520, 1);
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wait_status_0(gspca_dev);
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reg_w(gspca_dev, 0xc5, 0x0003, 0x0000);
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wait_status_1(gspca_dev);
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wait_status_0(gspca_dev);
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mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
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reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode);
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reg_r(gspca_dev, 0x25, 0x0004, 1);
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reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06); /* 420 */
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reg_r(gspca_dev, 0x27, 0x0000, 1);
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/* not useful..
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gspca_dev->alt = 4; * use alternate setting 3 */
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return gspca_dev->usb_err;
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}
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/* -- start the camera -- */
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static int sd_start(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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/* initialize the JPEG header */
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jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height,
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gspca_dev->pixfmt.width,
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0x22); /* JPEG 411 */
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/* the JPEG quality shall be 85% */
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jpeg_set_qual(sd->jpeg_hdr, 85);
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reg_r(gspca_dev, 0x00, 0x2520, 1);
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msleep(8);
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/* start the capture */
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wait_status_0(gspca_dev);
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reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */
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wait_status_1(gspca_dev);
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wait_status_0(gspca_dev);
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msleep(200);
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sd->pkt_seq = 0;
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return gspca_dev->usb_err;
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}
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static void sd_stopN(struct gspca_dev *gspca_dev)
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{
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/* stop the capture */
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wait_status_0(gspca_dev);
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reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */
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wait_status_1(gspca_dev);
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wait_status_0(gspca_dev);
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}
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/* move a packet adding 0x00 after 0xff */
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static void add_packet(struct gspca_dev *gspca_dev,
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u8 *data,
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int len)
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{
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int i;
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i = 0;
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do {
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if (data[i] == 0xff) {
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gspca_frame_add(gspca_dev, INTER_PACKET,
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data, i + 1);
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len -= i;
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data += i;
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*data = 0x00;
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i = 0;
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}
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} while (++i < len);
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gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
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}
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static void sd_pkt_scan(struct gspca_dev *gspca_dev,
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u8 *data, /* isoc packet */
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int len) /* iso packet length */
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{
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struct sd *sd = (struct sd *) gspca_dev;
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static const u8 ffd9[] = {0xff, 0xd9};
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/* image packets start with:
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* 02 8n
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* with <n> bit:
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* 0x01: even (0) / odd (1) image
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* 0x02: end of image when set
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*/
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if (len < 3)
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return; /* empty packet */
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if (*data == 0x02) {
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if (data[1] & 0x02) {
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sd->pkt_seq = !(data[1] & 1);
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add_packet(gspca_dev, data + 2, len - 2);
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gspca_frame_add(gspca_dev, LAST_PACKET,
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ffd9, 2);
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return;
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}
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if ((data[1] & 1) != sd->pkt_seq)
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goto err;
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if (gspca_dev->last_packet_type == LAST_PACKET)
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gspca_frame_add(gspca_dev, FIRST_PACKET,
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sd->jpeg_hdr, JPEG_HDR_SZ);
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add_packet(gspca_dev, data + 2, len - 2);
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return;
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}
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err:
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gspca_dev->last_packet_type = DISCARD_PACKET;
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}
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static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct gspca_dev *gspca_dev =
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container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
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gspca_dev->usb_err = 0;
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if (!gspca_dev->streaming)
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return 0;
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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setbrightness(gspca_dev, ctrl->val);
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break;
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case V4L2_CID_CONTRAST:
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setcontrast(gspca_dev, ctrl->val);
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break;
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case V4L2_CID_HUE:
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sethue(gspca_dev, ctrl->val);
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break;
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case V4L2_CID_SATURATION:
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setcolor(gspca_dev, ctrl->val);
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break;
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case V4L2_CID_SHARPNESS:
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setsharpness(gspca_dev, ctrl->val);
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break;
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}
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return gspca_dev->usb_err;
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}
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static const struct v4l2_ctrl_ops sd_ctrl_ops = {
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.s_ctrl = sd_s_ctrl,
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};
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static int sd_init_controls(struct gspca_dev *gspca_dev)
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{
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struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
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gspca_dev->vdev.ctrl_handler = hdl;
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v4l2_ctrl_handler_init(hdl, 5);
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v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
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V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
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v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
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V4L2_CID_CONTRAST, 0, 8, 1, 1);
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v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
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V4L2_CID_HUE, 0, 255, 1, 0);
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v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
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V4L2_CID_SATURATION, 0, 8, 1, 1);
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v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
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V4L2_CID_SHARPNESS, 0, 255, 1, 0);
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if (hdl->error) {
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pr_err("Could not initialize controls\n");
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return hdl->error;
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}
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return 0;
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}
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/* sub-driver description */
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static const struct sd_desc sd_desc = {
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.name = MODULE_NAME,
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.config = sd_config,
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.init = sd_init,
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.init_controls = sd_init_controls,
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.isoc_init = sd_isoc_init,
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.start = sd_start,
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.stopN = sd_stopN,
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.pkt_scan = sd_pkt_scan,
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};
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/* -- module initialisation -- */
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static const struct usb_device_id device_table[] = {
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{USB_DEVICE(0x04fc, 0x1528)},
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{}
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};
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MODULE_DEVICE_TABLE(usb, device_table);
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/* -- device connect -- */
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static int sd_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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/* the video interface for isochronous transfer is 1 */
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if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
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return -ENODEV;
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return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd),
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THIS_MODULE);
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}
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static struct usb_driver sd_driver = {
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.name = MODULE_NAME,
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.id_table = device_table,
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.probe = sd_probe,
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.disconnect = gspca_disconnect,
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#ifdef CONFIG_PM
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.suspend = gspca_suspend,
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.resume = gspca_resume,
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.reset_resume = gspca_resume,
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#endif
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};
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module_usb_driver(sd_driver);
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