--- /dev/null
+/*
+ * Benq DC E300 subdriver
+ *
+ * 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.
+ *
+ * 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 "benq"
+
+#include "gspca.h"
+
+MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
+MODULE_DESCRIPTION("Benq DC E300 USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+/* specific webcam descriptor */
+struct sd {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+ {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
+ .bytesperline = 320,
+ .sizeimage = 320 * 240 * 3 / 8 + 590,
+ .colorspace = V4L2_COLORSPACE_JPEG},
+};
+
+static void sd_isoc_irq(struct urb *urb);
+
+/* -- write a register -- */
+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,
+ 500);
+ if (ret < 0) {
+ pr_err("reg_w err %d\n", ret);
+ gspca_dev->usb_err = ret;
+ }
+}
+
+/* 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)
+{
+ return 0;
+}
+
+/* -- start the camera -- */
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+ struct urb *urb;
+ int i, n;
+
+ /* 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_PKT_SZ 64
+#define SD_NPKT 32
+ for (n = 0; n < 4; n++) {
+ urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
+ if (!urb) {
+ pr_err("usb_alloc_urb failed\n");
+ return -ENOMEM;
+ }
+ gspca_dev->urb[n] = urb;
+ urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
+ SD_PKT_SZ * SD_NPKT,
+ GFP_KERNEL,
+ &urb->transfer_dma);
+
+ if (urb->transfer_buffer == NULL) {
+ pr_err("usb_alloc_coherent failed\n");
+ return -ENOMEM;
+ }
+ urb->dev = gspca_dev->dev;
+ urb->context = gspca_dev;
+ urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT;
+ urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
+ n & 1 ? 0x82 : 0x83);
+ 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 = SD_PKT_SZ;
+ urb->iso_frame_desc[i].offset = SD_PKT_SZ * i;
+ }
+ }
+
+ return gspca_dev->usb_err;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+ struct usb_interface *intf;
+
+ reg_w(gspca_dev, 0x003c, 0x0003);
+ reg_w(gspca_dev, 0x003c, 0x0004);
+ reg_w(gspca_dev, 0x003c, 0x0005);
+ reg_w(gspca_dev, 0x003c, 0x0006);
+ reg_w(gspca_dev, 0x003c, 0x0007);
+
+ intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+ usb_set_interface(gspca_dev->dev, gspca_dev->iface,
+ intf->num_altsetting - 1);
+}
+
+static void sd_pkt_scan(struct gspca_dev *gspca_dev,
+ u8 *data, /* isoc packet */
+ int len) /* iso packet length */
+{
+ /* unused */
+}
+
+/* reception of an URB */
+static void sd_isoc_irq(struct urb *urb)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ struct urb *urb0;
+ u8 *data;
+ int i, st;
+
+ PDEBUG(D_PACK, "sd isoc irq");
+ if (!gspca_dev->streaming)
+ return;
+ if (urb->status != 0) {
+ if (urb->status == -ESHUTDOWN)
+ return; /* disconnection */
+#ifdef CONFIG_PM
+ if (gspca_dev->frozen)
+ return;
+#endif
+ pr_err("urb status: %d\n", urb->status);
+ return;
+ }
+
+ /* if this is a control URN (ep 0x83), wait */
+ if (urb == gspca_dev->urb[0] || urb == gspca_dev->urb[2])
+ return;
+
+ /* scan both received URBs */
+ if (urb == gspca_dev->urb[1])
+ urb0 = gspca_dev->urb[0];
+ else
+ urb0 = gspca_dev->urb[2];
+ for (i = 0; i < urb->number_of_packets; i++) {
+
+ /* check the packet status and length */
+ if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ
+ || urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) {
+ PERR("ISOC bad lengths %d / %d",
+ urb0->iso_frame_desc[i].actual_length,
+ urb->iso_frame_desc[i].actual_length);
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+ st = urb0->iso_frame_desc[i].status;
+ if (st == 0)
+ st = urb->iso_frame_desc[i].status;
+ if (st) {
+ pr_err("ISOC data error: [%d] status=%d\n",
+ i, st);
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+
+ /*
+ * The images are received in URBs of different endpoints
+ * (0x83 and 0x82).
+ * Image pieces in URBs of ep 0x83 are continuated in URBs of
+ * ep 0x82 of the same index.
+ * The packets in the URBs of endpoint 0x83 start with:
+ * - 80 ba/bb 00 00 = start of image followed by 'ff d8'
+ * - 04 ba/bb oo oo = image piece
+ * where 'oo oo' is the image offset
+ (not cheked)
+ * - (other -> bad frame)
+ * The images are JPEG encoded with full header and
+ * normal ff escape.
+ * The end of image ('ff d9') may occur in any URB.
+ * (not cheked)
+ */
+ data = (u8 *) urb0->transfer_buffer
+ + urb0->iso_frame_desc[i].offset;
+ if (data[0] == 0x80 && (data[1] & 0xfe) == 0xba) {
+
+ /* new image */
+ gspca_frame_add(gspca_dev, LAST_PACKET,
+ NULL, 0);
+ gspca_frame_add(gspca_dev, FIRST_PACKET,
+ data + 4, SD_PKT_SZ - 4);
+ } else if (data[0] == 0x04 && (data[1] & 0xfe) == 0xba) {
+ gspca_frame_add(gspca_dev, INTER_PACKET,
+ data + 4, SD_PKT_SZ - 4);
+ } else {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+ data = (u8 *) urb->transfer_buffer
+ + urb->iso_frame_desc[i].offset;
+ gspca_frame_add(gspca_dev, INTER_PACKET,
+ data, SD_PKT_SZ);
+ }
+
+ /* resubmit the URBs */
+ st = usb_submit_urb(urb0, GFP_ATOMIC);
+ if (st < 0)
+ pr_err("usb_submit_urb(0) ret %d\n", st);
+ st = usb_submit_urb(urb, GFP_ATOMIC);
+ if (st < 0)
+ pr_err("usb_submit_urb() ret %d\n", st);
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ .config = sd_config,
+ .init = sd_init,
+ .start = sd_start,
+ .stopN = sd_stopN,
+ .pkt_scan = sd_pkt_scan,
+};
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x04a5, 0x3035)},
+ {}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- device connect -- */
+static int sd_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ return gspca_dev_probe(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