forked from Minki/linux
98522a7be9
As a side effect, the sd routine stop0 is called on disconnect. This permits the subdriver to free its resources. Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
475 lines
12 KiB
C
475 lines
12 KiB
C
/*
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* Fujifilm Finepix subdriver
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*
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* Copyright (C) 2008 Frank Zago
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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 MODULE_NAME "finepix"
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#include "gspca.h"
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MODULE_AUTHOR("Frank Zago <frank@zago.net>");
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MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver");
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MODULE_LICENSE("GPL");
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/* Default timeout, in ms */
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#define FPIX_TIMEOUT (HZ / 10)
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/* Maximum transfer size to use. The windows driver reads by chunks of
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* 0x2000 bytes, so do the same. Note: reading more seems to work
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* too. */
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#define FPIX_MAX_TRANSFER 0x2000
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/* Structure to hold all of our device specific stuff */
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struct usb_fpix {
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struct gspca_dev gspca_dev; /* !! must be the first item */
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/*
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* USB stuff
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*/
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struct usb_ctrlrequest ctrlreq;
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struct urb *control_urb;
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struct timer_list bulk_timer;
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enum {
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FPIX_NOP, /* inactive, else streaming */
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FPIX_RESET, /* must reset */
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FPIX_REQ_FRAME, /* requesting a frame */
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FPIX_READ_FRAME, /* reading frame */
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} state;
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/*
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* Driver stuff
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*/
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struct delayed_work wqe;
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struct completion can_close;
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int streaming;
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};
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/* Delay after which claim the next frame. If the delay is too small,
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* the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
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* will fail every 4 or 5 frames, but 30ms is perfect. */
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#define NEXT_FRAME_DELAY (((HZ * 30) + 999) / 1000)
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#define dev_new_state(new_state) { \
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PDEBUG(D_STREAM, "new state from %d to %d at %s:%d", \
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dev->state, new_state, __func__, __LINE__); \
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dev->state = new_state; \
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}
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/* These cameras only support 320x200. */
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static struct v4l2_pix_format fpix_mode[1] = {
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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 * 3 / 8 + 590,
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.colorspace = V4L2_COLORSPACE_SRGB,
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.priv = 0}
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};
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/* Reads part of a frame */
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static void read_frame_part(struct usb_fpix *dev)
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{
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int ret;
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PDEBUG(D_STREAM, "read_frame_part");
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/* Reads part of a frame */
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ret = usb_submit_urb(dev->gspca_dev.urb[0], GFP_ATOMIC);
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if (ret) {
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dev_new_state(FPIX_RESET);
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schedule_delayed_work(&dev->wqe, 1);
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PDEBUG(D_STREAM, "usb_submit_urb failed with %d",
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ret);
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} else {
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/* Sometimes we never get a callback, so use a timer.
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* Is this masking a bug somewhere else? */
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dev->bulk_timer.expires = jiffies + msecs_to_jiffies(150);
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add_timer(&dev->bulk_timer);
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}
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}
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/* Callback for URBs. */
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static void urb_callback(struct urb *urb)
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{
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struct gspca_dev *gspca_dev = urb->context;
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struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
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PDEBUG(D_PACK,
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"enter urb_callback - status=%d, length=%d",
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urb->status, urb->actual_length);
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if (dev->state == FPIX_READ_FRAME)
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del_timer(&dev->bulk_timer);
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if (urb->status != 0) {
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/* We kill a stuck urb every 50 frames on average, so don't
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* display a log message for that. */
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if (urb->status != -ECONNRESET)
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PDEBUG(D_STREAM, "bad URB status %d", urb->status);
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dev_new_state(FPIX_RESET);
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schedule_delayed_work(&dev->wqe, 1);
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}
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switch (dev->state) {
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case FPIX_REQ_FRAME:
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dev_new_state(FPIX_READ_FRAME);
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read_frame_part(dev);
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break;
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case FPIX_READ_FRAME: {
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unsigned char *data = urb->transfer_buffer;
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struct gspca_frame *frame;
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frame = gspca_get_i_frame(&dev->gspca_dev);
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if (frame == NULL)
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gspca_dev->last_packet_type = DISCARD_PACKET;
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if (urb->actual_length < FPIX_MAX_TRANSFER ||
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(data[urb->actual_length-2] == 0xff &&
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data[urb->actual_length-1] == 0xd9)) {
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/* If the result is less than what was asked
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* for, then it's the end of the
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* frame. Sometime the jpeg is not complete,
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* but there's nothing we can do. We also end
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* here if the the jpeg ends right at the end
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* of the frame. */
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if (frame)
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gspca_frame_add(gspca_dev, LAST_PACKET,
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frame,
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data, urb->actual_length);
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dev_new_state(FPIX_REQ_FRAME);
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schedule_delayed_work(&dev->wqe, NEXT_FRAME_DELAY);
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} else {
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/* got a partial image */
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if (frame)
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gspca_frame_add(gspca_dev,
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gspca_dev->last_packet_type
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== LAST_PACKET
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? FIRST_PACKET : INTER_PACKET,
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frame,
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data, urb->actual_length);
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read_frame_part(dev);
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}
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break;
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}
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case FPIX_NOP:
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case FPIX_RESET:
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PDEBUG(D_STREAM, "invalid state %d", dev->state);
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break;
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}
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}
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/* Request a new frame */
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static void request_frame(struct usb_fpix *dev)
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{
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int ret;
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struct gspca_dev *gspca_dev = &dev->gspca_dev;
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/* Setup command packet */
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memset(gspca_dev->usb_buf, 0, 12);
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gspca_dev->usb_buf[0] = 0xd3;
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gspca_dev->usb_buf[7] = 0x01;
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/* Request a frame */
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dev->ctrlreq.bRequestType =
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USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
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dev->ctrlreq.bRequest = USB_REQ_GET_STATUS;
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dev->ctrlreq.wValue = 0;
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dev->ctrlreq.wIndex = 0;
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dev->ctrlreq.wLength = cpu_to_le16(12);
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usb_fill_control_urb(dev->control_urb,
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gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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(unsigned char *) &dev->ctrlreq,
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gspca_dev->usb_buf,
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12, urb_callback, gspca_dev);
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ret = usb_submit_urb(dev->control_urb, GFP_ATOMIC);
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if (ret) {
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dev_new_state(FPIX_RESET);
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schedule_delayed_work(&dev->wqe, 1);
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PDEBUG(D_STREAM, "usb_submit_urb failed with %d", ret);
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}
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}
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/*--------------------------------------------------------------------------*/
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/* State machine. */
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static void fpix_sm(struct work_struct *work)
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{
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struct usb_fpix *dev = container_of(work, struct usb_fpix, wqe.work);
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PDEBUG(D_STREAM, "fpix_sm state %d", dev->state);
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/* verify that the device wasn't unplugged */
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if (!dev->gspca_dev.present) {
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PDEBUG(D_STREAM, "device is gone");
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dev_new_state(FPIX_NOP);
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complete(&dev->can_close);
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return;
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}
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if (!dev->streaming) {
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PDEBUG(D_STREAM, "stopping state machine");
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dev_new_state(FPIX_NOP);
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complete(&dev->can_close);
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return;
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}
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switch (dev->state) {
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case FPIX_RESET:
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dev_new_state(FPIX_REQ_FRAME);
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schedule_delayed_work(&dev->wqe, HZ / 10);
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break;
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case FPIX_REQ_FRAME:
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/* get an image */
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request_frame(dev);
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break;
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case FPIX_NOP:
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case FPIX_READ_FRAME:
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PDEBUG(D_STREAM, "invalid state %d", dev->state);
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break;
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}
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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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struct cam *cam = &gspca_dev->cam;
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cam->cam_mode = fpix_mode;
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cam->nmodes = 1;
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cam->epaddr = 0x01; /* todo: correct for all cams? */
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cam->bulk_size = FPIX_MAX_TRANSFER;
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/* gspca_dev->nbalt = 1; * use bulk transfer */
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return 0;
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}
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/* Stop streaming and free the ressources allocated by sd_start. */
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static void sd_stopN(struct gspca_dev *gspca_dev)
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{
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struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
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dev->streaming = 0;
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/* Stop the state machine */
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if (dev->state != FPIX_NOP)
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wait_for_completion(&dev->can_close);
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}
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/* called on streamoff with alt 0 and disconnect */
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static void sd_stop0(struct gspca_dev *gspca_dev)
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{
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struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
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usb_free_urb(dev->control_urb);
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dev->control_urb = NULL;
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}
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/* Kill an URB that hasn't completed. */
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static void timeout_kill(unsigned long data)
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{
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struct urb *urb = (struct urb *) data;
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usb_unlink_urb(urb);
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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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struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
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INIT_DELAYED_WORK(&dev->wqe, fpix_sm);
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init_timer(&dev->bulk_timer);
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dev->bulk_timer.function = timeout_kill;
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return 0;
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}
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static int sd_start(struct gspca_dev *gspca_dev)
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{
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struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
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int ret;
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int size_ret;
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/* Reset bulk in endpoint */
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usb_clear_halt(gspca_dev->dev, gspca_dev->cam.epaddr);
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/* Init the device */
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memset(gspca_dev->usb_buf, 0, 12);
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gspca_dev->usb_buf[0] = 0xc6;
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gspca_dev->usb_buf[8] = 0x20;
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ret = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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USB_REQ_GET_STATUS,
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USB_DIR_OUT | USB_TYPE_CLASS |
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USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
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12, FPIX_TIMEOUT);
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if (ret != 12) {
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PDEBUG(D_STREAM, "usb_control_msg failed (%d)", ret);
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ret = -EIO;
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goto error;
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}
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/* Read the result of the command. Ignore the result, for it
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* varies with the device. */
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev,
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gspca_dev->cam.epaddr),
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gspca_dev->usb_buf, FPIX_MAX_TRANSFER, &size_ret,
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FPIX_TIMEOUT);
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if (ret != 0) {
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PDEBUG(D_STREAM, "usb_bulk_msg failed (%d)", ret);
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ret = -EIO;
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goto error;
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}
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/* Request a frame, but don't read it */
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memset(gspca_dev->usb_buf, 0, 12);
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gspca_dev->usb_buf[0] = 0xd3;
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gspca_dev->usb_buf[7] = 0x01;
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ret = usb_control_msg(gspca_dev->dev,
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usb_sndctrlpipe(gspca_dev->dev, 0),
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USB_REQ_GET_STATUS,
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USB_DIR_OUT | USB_TYPE_CLASS |
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USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
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12, FPIX_TIMEOUT);
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if (ret != 12) {
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PDEBUG(D_STREAM, "usb_control_msg failed (%d)", ret);
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ret = -EIO;
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goto error;
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}
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/* Again, reset bulk in endpoint */
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usb_clear_halt(gspca_dev->dev, gspca_dev->cam.epaddr);
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/* Allocate a control URB */
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dev->control_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!dev->control_urb) {
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PDEBUG(D_STREAM, "No free urbs available");
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ret = -EIO;
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goto error;
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}
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/* Various initializations. */
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init_completion(&dev->can_close);
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dev->bulk_timer.data = (unsigned long)dev->gspca_dev.urb[0];
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dev->gspca_dev.urb[0]->complete = urb_callback;
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dev->streaming = 1;
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/* Schedule a frame request. */
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dev_new_state(FPIX_REQ_FRAME);
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schedule_delayed_work(&dev->wqe, 1);
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return 0;
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error:
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/* Free the ressources */
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sd_stopN(gspca_dev);
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sd_stop0(gspca_dev);
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return ret;
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}
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/* Table of supported USB devices */
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static const __devinitdata struct usb_device_id device_table[] = {
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{USB_DEVICE(0x04cb, 0x0104)},
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{USB_DEVICE(0x04cb, 0x0109)},
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{USB_DEVICE(0x04cb, 0x010b)},
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{USB_DEVICE(0x04cb, 0x010f)},
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{USB_DEVICE(0x04cb, 0x0111)},
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{USB_DEVICE(0x04cb, 0x0113)},
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{USB_DEVICE(0x04cb, 0x0115)},
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{USB_DEVICE(0x04cb, 0x0117)},
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{USB_DEVICE(0x04cb, 0x0119)},
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{USB_DEVICE(0x04cb, 0x011b)},
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{USB_DEVICE(0x04cb, 0x011d)},
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{USB_DEVICE(0x04cb, 0x0121)},
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{USB_DEVICE(0x04cb, 0x0123)},
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{USB_DEVICE(0x04cb, 0x0125)},
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{USB_DEVICE(0x04cb, 0x0127)},
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{USB_DEVICE(0x04cb, 0x0129)},
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{USB_DEVICE(0x04cb, 0x012b)},
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{USB_DEVICE(0x04cb, 0x012d)},
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{USB_DEVICE(0x04cb, 0x012f)},
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{USB_DEVICE(0x04cb, 0x0131)},
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{USB_DEVICE(0x04cb, 0x013b)},
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{USB_DEVICE(0x04cb, 0x013d)},
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{USB_DEVICE(0x04cb, 0x013f)},
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{}
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};
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MODULE_DEVICE_TABLE(usb, device_table);
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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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.start = sd_start,
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.stopN = sd_stopN,
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.stop0 = sd_stop0,
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};
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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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return gspca_dev_probe(intf, id,
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&sd_desc,
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sizeof(struct usb_fpix),
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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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#endif
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};
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/* -- module insert / remove -- */
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static int __init sd_mod_init(void)
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{
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if (usb_register(&sd_driver) < 0)
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return -1;
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PDEBUG(D_PROBE, "registered");
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return 0;
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}
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static void __exit sd_mod_exit(void)
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{
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usb_deregister(&sd_driver);
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PDEBUG(D_PROBE, "deregistered");
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}
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module_init(sd_mod_init);
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module_exit(sd_mod_exit);
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