--- /dev/null
+/*
+ * Fujifilm Finepix subdriver
+ *
+ * Copyright (C) 2008 Frank Zago
+ *
+ * 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 MODULE_NAME "finepix"
+
+#include "gspca.h"
+
+MODULE_AUTHOR("Frank Zago <frank@zago.net>");
+MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver");
+MODULE_LICENSE("GPL");
+
+/* Default timeout, in ms */
+#define FPIX_TIMEOUT (HZ / 10)
+
+/* Maximum transfer size to use. The windows driver reads by chunks of
+ * 0x2000 bytes, so do the same. Note: reading more seems to work
+ * too. */
+#define FPIX_MAX_TRANSFER 0x2000
+
+/* Structure to hold all of our device specific stuff */
+struct usb_fpix {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+
+ /*
+ * USB stuff
+ */
+ struct usb_ctrlrequest ctrlreq;
+ struct urb *control_urb;
+ struct timer_list bulk_timer;
+
+ enum {
+ FPIX_NOP, /* inactive, else streaming */
+ FPIX_RESET, /* must reset */
+ FPIX_REQ_FRAME, /* requesting a frame */
+ FPIX_READ_FRAME, /* reading frame */
+ } state;
+
+ /*
+ * Driver stuff
+ */
+ struct delayed_work wqe;
+ struct completion can_close;
+ int streaming;
+};
+
+/* Delay after which claim the next frame. If the delay is too small,
+ * the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
+ * will fail every 4 or 5 frames, but 30ms is perfect. */
+#define NEXT_FRAME_DELAY (((HZ * 30) + 999) / 1000)
+
+#define dev_new_state(new_state) { \
+ PDEBUG(D_STREAM, "new state from %d to %d at %s:%d", \
+ dev->state, new_state, __func__, __LINE__); \
+ dev->state = new_state; \
+}
+
+/* These cameras only support 320x200. */
+static struct v4l2_pix_format fpix_mode[1] = {
+ { 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
+ .bytesperline = 320,
+ .sizeimage = 320 * 240 * 3 / 8 + 590,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0}
+};
+
+/* Reads part of a frame */
+static void read_frame_part(struct usb_fpix *dev)
+{
+ int ret;
+
+ PDEBUG(D_STREAM, "read_frame_part");
+
+ /* Reads part of a frame */
+ ret = usb_submit_urb(dev->gspca_dev.urb[0], GFP_ATOMIC);
+ if (ret) {
+ dev_new_state(FPIX_RESET);
+ schedule_delayed_work(&dev->wqe, 1);
+ PDEBUG(D_STREAM, "usb_submit_urb failed with %d",
+ ret);
+ } else {
+ /* Sometimes we never get a callback, so use a timer.
+ * Is this masking a bug somewhere else? */
+ dev->bulk_timer.expires = jiffies + msecs_to_jiffies(150);
+ add_timer(&dev->bulk_timer);
+ }
+}
+
+/* Callback for URBs. */
+static void urb_callback(struct urb *urb)
+{
+ struct gspca_dev *gspca_dev = urb->context;
+ struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
+
+ PDEBUG(D_PACK,
+ "enter urb_callback - status=%d, length=%d",
+ urb->status, urb->actual_length);
+
+ if (dev->state == FPIX_READ_FRAME)
+ del_timer(&dev->bulk_timer);
+
+ if (urb->status != 0) {
+ /* We kill a stuck urb every 50 frames on average, so don't
+ * display a log message for that. */
+ if (urb->status != -ECONNRESET)
+ PDEBUG(D_STREAM, "bad URB status %d", urb->status);
+ dev_new_state(FPIX_RESET);
+ schedule_delayed_work(&dev->wqe, 1);
+ }
+
+ switch (dev->state) {
+ case FPIX_REQ_FRAME:
+ dev_new_state(FPIX_READ_FRAME);
+ read_frame_part(dev);
+ break;
+
+ case FPIX_READ_FRAME: {
+ unsigned char *data = urb->transfer_buffer;
+ struct gspca_frame *frame;
+
+ frame = gspca_get_i_frame(&dev->gspca_dev);
+ if (frame == NULL) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ break;
+ }
+ if (urb->actual_length < FPIX_MAX_TRANSFER ||
+ (data[urb->actual_length-2] == 0xff &&
+ data[urb->actual_length-1] == 0xd9)) {
+
+ /* If the result is less than what was asked
+ * for, then it's the end of the
+ * frame. Sometime the jpeg is not complete,
+ * but there's nothing we can do. We also end
+ * here if the the jpeg ends right at the end
+ * of the frame. */
+ gspca_frame_add(gspca_dev, LAST_PACKET,
+ frame,
+ data, urb->actual_length);
+ dev_new_state(FPIX_REQ_FRAME);
+ schedule_delayed_work(&dev->wqe, NEXT_FRAME_DELAY);
+ } else {
+
+ /* got a partial image */
+ gspca_frame_add(gspca_dev,
+ gspca_dev->last_packet_type == LAST_PACKET
+ ? FIRST_PACKET : INTER_PACKET,
+ frame,
+ data, urb->actual_length);
+ read_frame_part(dev);
+ }
+ break;
+ }
+
+ case FPIX_NOP:
+ case FPIX_RESET:
+ PDEBUG(D_STREAM, "invalid state %d", dev->state);
+ break;
+ }
+}
+
+/* Request a new frame */
+static void request_frame(struct usb_fpix *dev)
+{
+ int ret;
+ struct gspca_dev *gspca_dev = &dev->gspca_dev;
+
+ /* Setup command packet */
+ memset(gspca_dev->usb_buf, 0, 12);
+ gspca_dev->usb_buf[0] = 0xd3;
+ gspca_dev->usb_buf[7] = 0x01;
+
+ /* Request a frame */
+ dev->ctrlreq.bRequestType =
+ USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
+ dev->ctrlreq.bRequest = USB_REQ_GET_STATUS;
+ dev->ctrlreq.wValue = 0;
+ dev->ctrlreq.wIndex = 0;
+ dev->ctrlreq.wLength = cpu_to_le16(12);
+
+ usb_fill_control_urb(dev->control_urb,
+ gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ (unsigned char *) &dev->ctrlreq,
+ gspca_dev->usb_buf,
+ 12, urb_callback, gspca_dev);
+
+ ret = usb_submit_urb(dev->control_urb, GFP_ATOMIC);
+ if (ret) {
+ dev_new_state(FPIX_RESET);
+ schedule_delayed_work(&dev->wqe, 1);
+ PDEBUG(D_STREAM, "usb_submit_urb failed with %d", ret);
+ }
+}
+
+/*--------------------------------------------------------------------------*/
+
+/* State machine. */
+static void fpix_sm(struct work_struct *work)
+{
+ struct usb_fpix *dev = container_of(work, struct usb_fpix, wqe.work);
+
+ PDEBUG(D_STREAM, "fpix_sm state %d", dev->state);
+
+ /* verify that the device wasn't unplugged */
+ if (!dev->gspca_dev.present) {
+ PDEBUG(D_STREAM, "device is gone");
+ dev_new_state(FPIX_NOP);
+ complete(&dev->can_close);
+ return;
+ }
+
+ if (!dev->streaming) {
+ PDEBUG(D_STREAM, "stopping state machine");
+ dev_new_state(FPIX_NOP);
+ complete(&dev->can_close);
+ return;
+ }
+
+ switch (dev->state) {
+ case FPIX_RESET:
+ dev_new_state(FPIX_REQ_FRAME);
+ schedule_delayed_work(&dev->wqe, HZ / 10);
+ break;
+
+ case FPIX_REQ_FRAME:
+ /* get an image */
+ request_frame(dev);
+ break;
+
+ case FPIX_NOP:
+ case FPIX_READ_FRAME:
+ PDEBUG(D_STREAM, "invalid state %d", dev->state);
+ break;
+ }
+}
+
+/* this function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ struct cam *cam = &gspca_dev->cam;
+
+ cam->cam_mode = fpix_mode;
+ cam->nmodes = 1;
+ cam->epaddr = 0x01; /* todo: correct for all cams? */
+ cam->bulk_size = FPIX_MAX_TRANSFER;
+
+/* gspca_dev->nbalt = 1; * use bulk transfer */
+ return 0;
+}
+
+/* Stop streaming and free the ressources allocated by sd_start. */
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+ struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
+
+ dev->streaming = 0;
+
+ /* Stop the state machine */
+ if (dev->state != FPIX_NOP)
+ wait_for_completion(&dev->can_close);
+
+ usb_free_urb(dev->control_urb);
+ dev->control_urb = NULL;
+}
+
+/* Kill an URB that hasn't completed. */
+static void timeout_kill(unsigned long data)
+{
+ struct urb *urb = (struct urb *) data;
+
+ usb_unlink_urb(urb);
+}
+
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+ struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
+
+ INIT_DELAYED_WORK(&dev->wqe, fpix_sm);
+
+ init_timer(&dev->bulk_timer);
+ dev->bulk_timer.function = timeout_kill;
+
+ return 0;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+ struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
+ int ret;
+ int size_ret;
+
+ /* Reset bulk in endpoint */
+ usb_clear_halt(gspca_dev->dev, gspca_dev->cam.epaddr);
+
+ /* Init the device */
+ memset(gspca_dev->usb_buf, 0, 12);
+ gspca_dev->usb_buf[0] = 0xc6;
+ gspca_dev->usb_buf[8] = 0x20;
+
+ ret = usb_control_msg(gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ USB_REQ_GET_STATUS,
+ USB_DIR_OUT | USB_TYPE_CLASS |
+ USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
+ 12, FPIX_TIMEOUT);
+
+ if (ret != 12) {
+ PDEBUG(D_STREAM, "usb_control_msg failed (%d)", ret);
+ ret = -EIO;
+ goto error;
+ }
+
+ /* Read the result of the command. Ignore the result, for it
+ * varies with the device. */
+ ret = usb_bulk_msg(gspca_dev->dev,
+ usb_rcvbulkpipe(gspca_dev->dev,
+ gspca_dev->cam.epaddr),
+ gspca_dev->usb_buf, FPIX_MAX_TRANSFER, &size_ret,
+ FPIX_TIMEOUT);
+ if (ret != 0) {
+ PDEBUG(D_STREAM, "usb_bulk_msg failed (%d)", ret);
+ ret = -EIO;
+ goto error;
+ }
+
+ /* Request a frame, but don't read it */
+ memset(gspca_dev->usb_buf, 0, 12);
+ gspca_dev->usb_buf[0] = 0xd3;
+ gspca_dev->usb_buf[7] = 0x01;
+
+ ret = usb_control_msg(gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ USB_REQ_GET_STATUS,
+ USB_DIR_OUT | USB_TYPE_CLASS |
+ USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
+ 12, FPIX_TIMEOUT);
+ if (ret != 12) {
+ PDEBUG(D_STREAM, "usb_control_msg failed (%d)", ret);
+ ret = -EIO;
+ goto error;
+ }
+
+ /* Again, reset bulk in endpoint */
+ usb_clear_halt(gspca_dev->dev, gspca_dev->cam.epaddr);
+
+ /* Allocate a control URB */
+ dev->control_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!dev->control_urb) {
+ PDEBUG(D_STREAM, "No free urbs available");
+ ret = -EIO;
+ goto error;
+ }
+
+ /* Various initializations. */
+ init_completion(&dev->can_close);
+ dev->bulk_timer.data = (unsigned long)dev->gspca_dev.urb[0];
+ dev->gspca_dev.urb[0]->complete = urb_callback;
+ dev->streaming = 1;
+
+ /* Schedule a frame request. */
+ dev_new_state(FPIX_REQ_FRAME);
+ schedule_delayed_work(&dev->wqe, 1);
+
+ return 0;
+
+error:
+ /* Free the ressources */
+ sd_stopN(gspca_dev);
+ return ret;
+}
+
+/* Table of supported USB devices */
+static const __devinitdata struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x04cb, 0x0104)},
+ {USB_DEVICE(0x04cb, 0x0109)},
+ {USB_DEVICE(0x04cb, 0x010b)},
+ {USB_DEVICE(0x04cb, 0x010f)},
+ {USB_DEVICE(0x04cb, 0x0111)},
+ {USB_DEVICE(0x04cb, 0x0113)},
+ {USB_DEVICE(0x04cb, 0x0115)},
+ {USB_DEVICE(0x04cb, 0x0117)},
+ {USB_DEVICE(0x04cb, 0x0119)},
+ {USB_DEVICE(0x04cb, 0x011b)},
+ {USB_DEVICE(0x04cb, 0x011d)},
+ {USB_DEVICE(0x04cb, 0x0121)},
+ {USB_DEVICE(0x04cb, 0x0123)},
+ {USB_DEVICE(0x04cb, 0x0125)},
+ {USB_DEVICE(0x04cb, 0x0127)},
+ {USB_DEVICE(0x04cb, 0x0129)},
+ {USB_DEVICE(0x04cb, 0x012b)},
+ {USB_DEVICE(0x04cb, 0x012d)},
+ {USB_DEVICE(0x04cb, 0x012f)},
+ {USB_DEVICE(0x04cb, 0x0131)},
+ {USB_DEVICE(0x04cb, 0x013b)},
+ {USB_DEVICE(0x04cb, 0x013d)},
+ {USB_DEVICE(0x04cb, 0x013f)},
+ {}
+};
+
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* 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,
+};
+
+/* -- 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 usb_fpix),
+ 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)
+{
+ if (usb_register(&sd_driver) < 0)
+ return -1;
+ 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 / linux-2.6-omap-h63xx.git / commitdiff