diff options
| -rw-r--r-- | drivers/media/video/gspca/finepix.c | 421 |
1 files changed, 134 insertions, 287 deletions
diff --git a/drivers/media/video/gspca/finepix.c b/drivers/media/video/gspca/finepix.c index dc65c363aa8..00e6863ed66 100644 --- a/drivers/media/video/gspca/finepix.c +++ b/drivers/media/video/gspca/finepix.c @@ -27,7 +27,7 @@ MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver"); MODULE_LICENSE("GPL"); /* Default timeout, in ms */ -#define FPIX_TIMEOUT (HZ / 10) +#define FPIX_TIMEOUT 250 /* Maximum transfer size to use. The windows driver reads by chunks of * 0x2000 bytes, so do the same. Note: reading more seems to work @@ -38,38 +38,15 @@ MODULE_LICENSE("GPL"); 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; + struct work_struct work_struct; + struct workqueue_struct *work_thread; }; /* 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; \ -} + * will fail every 4 or 5 frames, but 30ms is perfect. On the A210, + * 30ms is bad while 35ms is perfect. */ +#define NEXT_FRAME_DELAY 35 /* These cameras only support 320x200. */ static const struct v4l2_pix_format fpix_mode[1] = { @@ -80,314 +57,183 @@ static const struct v4l2_pix_format fpix_mode[1] = { .priv = 0} }; -/* Reads part of a frame */ -static void read_frame_part(struct usb_fpix *dev) +/* send a command to the webcam */ +static int command(struct gspca_dev *gspca_dev, + int order) /* 0: reset, 1: frame request */ { - int ret; + static u8 order_values[2][12] = { + {0xc6, 0, 0, 0, 0, 0, 0, 0, 0x20, 0, 0, 0}, /* reset */ + {0xd3, 0, 0, 0, 0, 0, 0, 0x01, 0, 0, 0, 0}, /* fr req */ + }; - 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); - } + memcpy(gspca_dev->usb_buf, order_values[order], 12); + return 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); } -/* Callback for URBs. */ -static void urb_callback(struct urb *urb) +/* workqueue */ +static void dostream(struct work_struct *work) { - 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; - 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. */ - if (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 { + struct usb_fpix *dev = container_of(work, struct usb_fpix, work_struct); + struct gspca_dev *gspca_dev = &dev->gspca_dev; + struct urb *urb = gspca_dev->urb[0]; + u8 *data = urb->transfer_buffer; + struct gspca_frame *frame; + int ret = 0; + int len; + + /* synchronize with the main driver */ + mutex_lock(&gspca_dev->usb_lock); + mutex_unlock(&gspca_dev->usb_lock); + PDEBUG(D_STREAM, "dostream started"); + + /* loop reading a frame */ +again: + while (gspca_dev->present && gspca_dev->streaming) { + + /* request a frame */ + mutex_lock(&gspca_dev->usb_lock); + ret = command(gspca_dev, 1); + mutex_unlock(&gspca_dev->usb_lock); + if (ret < 0) + break; + if (!gspca_dev->present || !gspca_dev->streaming) + break; + + /* the frame comes in parts */ + for (;;) { + ret = usb_bulk_msg(gspca_dev->dev, + urb->pipe, + data, + FPIX_MAX_TRANSFER, + &len, FPIX_TIMEOUT); + if (ret < 0) { + /* Most of the time we get a timeout + * error. Just restart. */ + goto again; + } + if (!gspca_dev->present || !gspca_dev->streaming) + goto out; + frame = gspca_get_i_frame(&dev->gspca_dev); + if (frame == NULL) + gspca_dev->last_packet_type = DISCARD_PACKET; + + if (len < FPIX_MAX_TRANSFER || + (data[len - 2] == 0xff && + data[len - 1] == 0xd9)) { + + /* If the result is less than what was asked + * for, then it's the end of the + * frame. Sometimes 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. */ + if (frame) + frame = gspca_frame_add(gspca_dev, + LAST_PACKET, + frame, + data, len); + break; + } /* got a partial image */ if (frame) gspca_frame_add(gspca_dev, gspca_dev->last_packet_type - == LAST_PACKET + == LAST_PACKET ? FIRST_PACKET : INTER_PACKET, - frame, - data, urb->actual_length); - read_frame_part(dev); + frame, data, len); } - 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); + /* We must wait before trying reading the next + * frame. If we don't, or if the delay is too short, + * the camera will disconnect. */ + msleep(NEXT_FRAME_DELAY); } -} - -/*--------------------------------------------------------------------------*/ -/* 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; - } +out: + PDEBUG(D_STREAM, "dostream stopped"); } /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) { + struct usb_fpix *dev = (struct usb_fpix *) gspca_dev; struct cam *cam = &gspca_dev->cam; cam->cam_mode = fpix_mode; cam->nmodes = 1; 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; + INIT_WORK(&dev->work_struct, dostream); - dev->streaming = 0; - - /* Stop the state machine */ - if (dev->state != FPIX_NOP) - wait_for_completion(&dev->can_close); -} - -/* called on streamoff with alt 0 and disconnect */ -static void sd_stop0(struct gspca_dev *gspca_dev) -{ - struct usb_fpix *dev = (struct usb_fpix *) gspca_dev; - - 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); + return 0; } /* 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; } +/* start the camera */ static int sd_start(struct gspca_dev *gspca_dev) { struct usb_fpix *dev = (struct usb_fpix *) gspca_dev; - int ret; - int size_ret; + int ret, len; /* 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; + ret = command(gspca_dev, 0); + if (ret < 0) { + PDEBUG(D_STREAM, "init failed %d", ret); + return ret; } /* Read the result of the command. Ignore the result, for it * varies with the device. */ ret = usb_bulk_msg(gspca_dev->dev, gspca_dev->urb[0]->pipe, - gspca_dev->usb_buf, FPIX_MAX_TRANSFER, &size_ret, + gspca_dev->urb[0]->transfer_buffer, + FPIX_MAX_TRANSFER, &len, FPIX_TIMEOUT); - if (ret != 0) { - PDEBUG(D_STREAM, "usb_bulk_msg failed (%d)", ret); - ret = -EIO; - goto error; + if (ret < 0) { + PDEBUG(D_STREAM, "usb_bulk_msg failed %d", ret); + return ret; } /* 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; + ret = command(gspca_dev, 1); + if (ret < 0) { + PDEBUG(D_STREAM, "frame request failed %d", ret); + return ret; } /* Again, reset bulk in endpoint */ usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe); - /* 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); + /* Start the workqueue function to do the streaming */ + dev->work_thread = create_singlethread_workqueue(MODULE_NAME); + queue_work(dev->work_thread, &dev->work_struct); return 0; +} + +/* called on streamoff with alt==0 and on disconnect */ +/* the usb_lock is held at entry - restore on exit */ +static void sd_stop0(struct gspca_dev *gspca_dev) +{ + struct usb_fpix *dev = (struct usb_fpix *) gspca_dev; -error: - /* Free the ressources */ - sd_stopN(gspca_dev); - sd_stop0(gspca_dev); - return ret; + /* wait for the work queue to terminate */ + mutex_unlock(&gspca_dev->usb_lock); + destroy_workqueue(dev->work_thread); + mutex_lock(&gspca_dev->usb_lock); + dev->work_thread = NULL; } /* Table of supported USB devices */ @@ -422,12 +268,11 @@ MODULE_DEVICE_TABLE(usb, device_table); /* sub-driver description */ static const struct sd_desc sd_desc = { - .name = MODULE_NAME, + .name = MODULE_NAME, .config = sd_config, - .init = sd_init, - .start = sd_start, - .stopN = sd_stopN, - .stop0 = sd_stop0, + .init = sd_init, + .start = sd_start, + .stop0 = sd_stop0, }; /* -- device connect -- */ @@ -441,13 +286,13 @@ static int sd_probe(struct usb_interface *intf, } static struct usb_driver sd_driver = { - .name = MODULE_NAME, - .id_table = device_table, - .probe = sd_probe, + .name = MODULE_NAME, + .id_table = device_table, + .probe = sd_probe, .disconnect = gspca_disconnect, #ifdef CONFIG_PM .suspend = gspca_suspend, - .resume = gspca_resume, + .resume = gspca_resume, #endif }; @@ -455,12 +300,14 @@ static struct usb_driver sd_driver = { 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); |