diff options
Diffstat (limited to 'drivers/media/usb/gspca/finepix.c')
| -rw-r--r-- | drivers/media/usb/gspca/finepix.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/finepix.c b/drivers/media/usb/gspca/finepix.c new file mode 100644 index 000000000..1ef1239eb --- /dev/null +++ b/drivers/media/usb/gspca/finepix.c @@ -0,0 +1,302 @@ +/* + * 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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 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 + * 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 */ + + struct work_struct work_struct; +}; + +/* 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. 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] = { + { 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, + .bytesperline = 320, + .sizeimage = 320 * 240 * 3 / 8 + 590, + .colorspace = V4L2_COLORSPACE_SRGB, + .priv = 0} +}; + +/* send a command to the webcam */ +static int command(struct gspca_dev *gspca_dev, + int order) /* 0: reset, 1: frame request */ +{ + 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 */ + }; + + 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); +} + +/* + * This function is called as a workqueue function and runs whenever the camera + * is streaming data. Because it is a workqueue function it is allowed to sleep + * so we can use synchronous USB calls. To avoid possible collisions with other + * threads attempting to use gspca_dev->usb_buf we take the usb_lock when + * performing USB operations using it. In practice we don't really need this + * as the camera doesn't provide any controls. + */ +static void dostream(struct work_struct *work) +{ + 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; + int ret = 0; + int len; + + gspca_dbg(gspca_dev, D_STREAM, "dostream started\n"); + + /* loop reading a frame */ +again: + while (gspca_dev->present && gspca_dev->streaming) { +#ifdef CONFIG_PM + if (gspca_dev->frozen) + break; +#endif + + /* request a frame */ + mutex_lock(&gspca_dev->usb_lock); + ret = command(gspca_dev, 1); + mutex_unlock(&gspca_dev->usb_lock); + if (ret < 0) + break; +#ifdef CONFIG_PM + if (gspca_dev->frozen) + break; +#endif + 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; + } +#ifdef CONFIG_PM + if (gspca_dev->frozen) + goto out; +#endif + if (!gspca_dev->present || !gspca_dev->streaming) + goto out; + 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. */ + gspca_frame_add(gspca_dev, LAST_PACKET, + data, len); + break; + } + + /* got a partial image */ + gspca_frame_add(gspca_dev, + gspca_dev->last_packet_type + == LAST_PACKET + ? FIRST_PACKET : INTER_PACKET, + data, len); + } + + /* 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); + } + +out: + gspca_dbg(gspca_dev, D_STREAM, "dostream stopped\n"); +} + +/* 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 = 1; + cam->bulk_size = FPIX_MAX_TRANSFER; + + INIT_WORK(&dev->work_struct, dostream); + + 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 usb_fpix *dev = (struct usb_fpix *) gspca_dev; + int ret, len; + + /* Init the device */ + ret = command(gspca_dev, 0); + if (ret < 0) { + pr_err("init failed %d\n", 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->urb[0]->transfer_buffer, + FPIX_MAX_TRANSFER, &len, + FPIX_TIMEOUT); + if (ret < 0) { + pr_err("usb_bulk_msg failed %d\n", ret); + return ret; + } + + /* Request a frame, but don't read it */ + ret = command(gspca_dev, 1); + if (ret < 0) { + pr_err("frame request failed %d\n", ret); + return ret; + } + + /* Again, reset bulk in endpoint */ + usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe); + + schedule_work(&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; + + /* wait for the work queue to terminate */ + mutex_unlock(&gspca_dev->usb_lock); + flush_work(&dev->work_struct); + mutex_lock(&gspca_dev->usb_lock); +} + +/* Table of supported USB devices */ +static const 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, + .stop0 = sd_stop0, +}; + +/* -- 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, + .reset_resume = gspca_resume, +#endif +}; + +module_usb_driver(sd_driver); |