--- /dev/null
+/*
+ * 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->pixfmt.height,
+ gspca_dev->pixfmt.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);
Code Review / kvmfornfv.git / blobdiff