--- /dev/null
+/*
+ * STV0680 USB Camera Driver
+ *
+ * Copyright (C) 2009 Hans de Goede <hdgoede@redhat.com>
+ *
+ * This module is adapted from the in kernel v4l1 stv680 driver:
+ *
+ * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
+ *
+ * Thanks to STMicroelectronics for information on the usb commands, and
+ * to Steve Miller at STM for his help and encouragement while I was
+ * writing this driver.
+ *
+ * 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
+ * (at your option) 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 MODULE_NAME "stv0680"
+
+#include "gspca.h"
+
+MODULE_AUTHOR("Hans de Goede <hdgoede@redhat.com>");
+MODULE_DESCRIPTION("STV0680 USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+/* specific webcam descriptor */
+struct sd {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+ struct v4l2_pix_format mode;
+ u8 orig_mode;
+ u8 video_mode;
+ u8 current_mode;
+};
+
+/* V4L2 controls supported by the driver */
+static struct ctrl sd_ctrls[] = {
+};
+
+static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,
+ int size)
+{
+ int ret = -1;
+ u8 req_type = 0;
+
+ switch (set) {
+ case 0: /* 0xc1 */
+ req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
+ break;
+ case 1: /* 0x41 */
+ req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
+ break;
+ case 2: /* 0x80 */
+ req_type = USB_DIR_IN | USB_RECIP_DEVICE;
+ break;
+ case 3: /* 0x40 */
+ req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
+ break;
+ }
+
+ ret = usb_control_msg(gspca_dev->dev,
+ usb_rcvctrlpipe(gspca_dev->dev, 0),
+ req, req_type,
+ val, 0, gspca_dev->usb_buf, size, 500);
+
+ if ((ret < 0) && (req != 0x0a))
+ PDEBUG(D_ERR,
+ "usb_control_msg error %i, request = 0x%x, error = %i",
+ set, req, ret);
+
+ return ret;
+}
+
+static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret)
+{
+ stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */
+ PDEBUG(D_ERR, "last error: %i, command = 0x%x",
+ gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
+ return ret;
+}
+
+static int stv0680_get_video_mode(struct gspca_dev *gspca_dev)
+{
+ /* Note not sure if this init of usb_buf is really necessary */
+ memset(gspca_dev->usb_buf, 0, 8);
+ gspca_dev->usb_buf[0] = 0x0f;
+
+ if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) {
+ PDEBUG(D_ERR, "Get_Camera_Mode failed");
+ return stv0680_handle_error(gspca_dev, -EIO);
+ }
+
+ return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
+}
+
+static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ if (sd->current_mode == mode)
+ return 0;
+
+ memset(gspca_dev->usb_buf, 0, 8);
+ gspca_dev->usb_buf[0] = mode;
+
+ if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) {
+ PDEBUG(D_ERR, "Set_Camera_Mode failed");
+ return stv0680_handle_error(gspca_dev, -EIO);
+ }
+
+ /* Verify we got what we've asked for */
+ if (stv0680_get_video_mode(gspca_dev) != mode) {
+ PDEBUG(D_ERR, "Error setting camera video mode!");
+ return -EIO;
+ }
+
+ sd->current_mode = mode;
+
+ return 0;
+}
+
+/* this function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ int ret;
+ struct sd *sd = (struct sd *) gspca_dev;
+ struct cam *cam = &gspca_dev->cam;
+
+ /* ping camera to be sure STV0680 is present */
+ if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 ||
+ gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) {
+ PDEBUG(D_ERR, "STV(e): camera ping failed!!");
+ return stv0680_handle_error(gspca_dev, -ENODEV);
+ }
+
+ /* get camera descriptor */
+ if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09)
+ return stv0680_handle_error(gspca_dev, -ENODEV);
+
+ if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 ||
+ gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) {
+ PDEBUG(D_ERR, "Could not get descriptor 0200.");
+ return stv0680_handle_error(gspca_dev, -ENODEV);
+ }
+ if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02)
+ return stv0680_handle_error(gspca_dev, -ENODEV);
+ if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24)
+ return stv0680_handle_error(gspca_dev, -ENODEV);
+ if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
+ return stv0680_handle_error(gspca_dev, -ENODEV);
+
+ if (!(gspca_dev->usb_buf[7] & 0x09)) {
+ PDEBUG(D_ERR, "Camera supports neither CIF nor QVGA mode");
+ return -ENODEV;
+ }
+ if (gspca_dev->usb_buf[7] & 0x01)
+ PDEBUG(D_PROBE, "Camera supports CIF mode");
+ if (gspca_dev->usb_buf[7] & 0x02)
+ PDEBUG(D_PROBE, "Camera supports VGA mode");
+ if (gspca_dev->usb_buf[7] & 0x08)
+ PDEBUG(D_PROBE, "Camera supports QVGA mode");
+
+ if (gspca_dev->usb_buf[7] & 0x01)
+ sd->video_mode = 0x00; /* CIF */
+ else
+ sd->video_mode = 0x03; /* QVGA */
+
+ /* FW rev, ASIC rev, sensor ID */
+ PDEBUG(D_PROBE, "Firmware rev is %i.%i",
+ gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
+ PDEBUG(D_PROBE, "ASIC rev is %i.%i",
+ gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]);
+ PDEBUG(D_PROBE, "Sensor ID is %i",
+ (gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4));
+
+
+ ret = stv0680_get_video_mode(gspca_dev);
+ if (ret < 0)
+ return ret;
+ sd->current_mode = sd->orig_mode = ret;
+
+ ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
+ if (ret < 0)
+ return ret;
+
+ /* Get mode details */
+ if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10)
+ return stv0680_handle_error(gspca_dev, -EIO);
+
+ cam->bulk = 1;
+ cam->bulk_nurbs = 1; /* The cam cannot handle more */
+ cam->bulk_size = (gspca_dev->usb_buf[0] << 24) |
+ (gspca_dev->usb_buf[1] << 16) |
+ (gspca_dev->usb_buf[2] << 8) |
+ (gspca_dev->usb_buf[3]);
+ sd->mode.width = (gspca_dev->usb_buf[4] << 8) |
+ (gspca_dev->usb_buf[5]); /* 322, 356, 644 */
+ sd->mode.height = (gspca_dev->usb_buf[6] << 8) |
+ (gspca_dev->usb_buf[7]); /* 242, 292, 484 */
+ sd->mode.pixelformat = V4L2_PIX_FMT_STV0680;
+ sd->mode.field = V4L2_FIELD_NONE;
+ sd->mode.bytesperline = sd->mode.width;
+ sd->mode.sizeimage = cam->bulk_size;
+ sd->mode.colorspace = V4L2_COLORSPACE_SRGB;
+
+ /* origGain = gspca_dev->usb_buf[12]; */
+
+ cam->cam_mode = &sd->mode;
+ cam->nmodes = 1;
+
+
+ ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode);
+ if (ret < 0)
+ return ret;
+
+ if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0100, 0x12) != 0x12 ||
+ gspca_dev->usb_buf[8] != 0x53 || gspca_dev->usb_buf[9] != 0x05) {
+ PDEBUG(D_ERR, "Could not get descriptor 0100.");
+ return stv0680_handle_error(gspca_dev, -EIO);
+ }
+
+ 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)
+{
+ int ret;
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
+ if (ret < 0)
+ return ret;
+
+ if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
+ return stv0680_handle_error(gspca_dev, -EIO);
+
+ /* Start stream at:
+ 0x0000 = CIF (352x288)
+ 0x0100 = VGA (640x480)
+ 0x0300 = QVGA (320x240) */
+ if (stv_sndctrl(gspca_dev, 1, 0x09, sd->video_mode << 8, 0x0) != 0x0)
+ return stv0680_handle_error(gspca_dev, -EIO);
+
+ return 0;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+ /* This is a high priority command; it stops all lower order cmds */
+ if (stv_sndctrl(gspca_dev, 1, 0x04, 0x0000, 0x0) != 0x0)
+ stv0680_handle_error(gspca_dev, -EIO);
+}
+
+static void sd_stop0(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ if (!sd->gspca_dev.present)
+ return;
+
+ stv0680_set_video_mode(gspca_dev, sd->orig_mode);
+}
+
+static void sd_pkt_scan(struct gspca_dev *gspca_dev,
+ struct gspca_frame *frame,
+ __u8 *data,
+ int len)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ /* Every now and then the camera sends a 16 byte packet, no idea
+ what it contains, but it is not image data, when this
+ happens the frame received before this packet is corrupt,
+ so discard it. */
+ if (len != sd->mode.sizeimage) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ return;
+ }
+
+ /* Finish the previous frame, we do this upon reception of the next
+ packet, even though it is already complete so that the strange 16
+ byte packets send after a corrupt frame can discard it. */
+ frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame, NULL, 0);
+
+ /* Store the just received frame */
+ gspca_frame_add(gspca_dev, FIRST_PACKET, frame, data, len);
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+ .name = MODULE_NAME,
+ .ctrls = sd_ctrls,
+ .nctrls = ARRAY_SIZE(sd_ctrls),
+ .config = sd_config,
+ .init = sd_init,
+ .start = sd_start,
+ .stopN = sd_stopN,
+ .stop0 = sd_stop0,
+ .pkt_scan = sd_pkt_scan,
+};
+
+/* -- module initialisation -- */
+static const __devinitdata struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x0553, 0x0202)},
+ {USB_DEVICE(0x041e, 0x4007)},
+ {}
+};
+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,
+#endif
+};
+
+/* -- module insert / remove -- */
+static int __init sd_mod_init(void)
+{
+ int ret;
+ ret = usb_register(&sd_driver);
+ if (ret < 0)
+ return ret;
+ PDEBUG(D_PROBE, "registered");
+ return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+ usb_deregister(&sd_driver);
+ PDEBUG(D_PROBE, "deregistered");
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff