diff options
Diffstat (limited to 'drivers/media/video/gspca/sq905c.c')
| -rw-r--r-- | drivers/media/video/gspca/sq905c.c | 344 |
1 files changed, 0 insertions, 344 deletions
diff --git a/drivers/media/video/gspca/sq905c.c b/drivers/media/video/gspca/sq905c.c deleted file mode 100644 index 70fae69..0000000 --- a/drivers/media/video/gspca/sq905c.c +++ /dev/null @@ -1,344 +0,0 @@ -/* - * SQ905C subdriver - * - * Copyright (C) 2009 Theodore Kilgore - * - * 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 - */ - -/* - * - * This driver uses work done in - * libgphoto2/camlibs/digigr8, Copyright (C) Theodore Kilgore. - * - * This driver has also used as a base the sq905c driver - * and may contain code fragments from it. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#define MODULE_NAME "sq905c" - -#include <linux/workqueue.h> -#include <linux/slab.h> -#include "gspca.h" - -MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>"); -MODULE_DESCRIPTION("GSPCA/SQ905C USB Camera Driver"); -MODULE_LICENSE("GPL"); - -/* Default timeouts, in ms */ -#define SQ905C_CMD_TIMEOUT 500 -#define SQ905C_DATA_TIMEOUT 1000 - -/* Maximum transfer size to use. */ -#define SQ905C_MAX_TRANSFER 0x8000 - -#define FRAME_HEADER_LEN 0x50 - -/* Commands. These go in the "value" slot. */ -#define SQ905C_CLEAR 0xa0 /* clear everything */ -#define SQ905C_GET_ID 0x14f4 /* Read version number */ -#define SQ905C_CAPTURE_LOW 0xa040 /* Starts capture at 160x120 */ -#define SQ905C_CAPTURE_MED 0x1440 /* Starts capture at 320x240 */ -#define SQ905C_CAPTURE_HI 0x2840 /* Starts capture at 320x240 */ - -/* For capture, this must go in the "index" slot. */ -#define SQ905C_CAPTURE_INDEX 0x110f - -/* Structure to hold all of our device specific stuff */ -struct sd { - struct gspca_dev gspca_dev; /* !! must be the first item */ - const struct v4l2_pix_format *cap_mode; - /* Driver stuff */ - struct work_struct work_struct; - struct workqueue_struct *work_thread; -}; - -/* - * Most of these cameras will do 640x480 and 320x240. 160x120 works - * in theory but gives very poor output. Therefore, not supported. - * The 0x2770:0x9050 cameras have max resolution of 320x240. - */ -static struct v4l2_pix_format sq905c_mode[] = { - { 320, 240, V4L2_PIX_FMT_SQ905C, V4L2_FIELD_NONE, - .bytesperline = 320, - .sizeimage = 320 * 240, - .colorspace = V4L2_COLORSPACE_SRGB, - .priv = 0}, - { 640, 480, V4L2_PIX_FMT_SQ905C, V4L2_FIELD_NONE, - .bytesperline = 640, - .sizeimage = 640 * 480, - .colorspace = V4L2_COLORSPACE_SRGB, - .priv = 0} -}; - -/* Send a command to the camera. */ -static int sq905c_command(struct gspca_dev *gspca_dev, u16 command, u16 index) -{ - int ret; - - ret = usb_control_msg(gspca_dev->dev, - usb_sndctrlpipe(gspca_dev->dev, 0), - USB_REQ_SYNCH_FRAME, /* request */ - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - command, index, NULL, 0, - SQ905C_CMD_TIMEOUT); - if (ret < 0) { - pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); - return ret; - } - - return 0; -} - -static int sq905c_read(struct gspca_dev *gspca_dev, u16 command, u16 index, - int size) -{ - int ret; - - ret = usb_control_msg(gspca_dev->dev, - usb_rcvctrlpipe(gspca_dev->dev, 0), - USB_REQ_SYNCH_FRAME, /* request */ - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - command, index, gspca_dev->usb_buf, size, - SQ905C_CMD_TIMEOUT); - if (ret < 0) { - pr_err("%s: usb_control_msg failed (%d)\n", __func__, ret); - return ret; - } - - return 0; -} - -/* 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 the camera's USB interface the gspca usb_lock is - * used when performing the one USB control operation inside the workqueue, - * which tells the camera to close the stream. In practice the only thing - * which needs to be protected against is the usb_set_interface call that - * gspca makes during stream_off. Otherwise the camera doesn't provide any - * controls that the user could try to change. - */ -static void sq905c_dostream(struct work_struct *work) -{ - struct sd *dev = container_of(work, struct sd, work_struct); - struct gspca_dev *gspca_dev = &dev->gspca_dev; - int bytes_left; /* bytes remaining in current frame. */ - int data_len; /* size to use for the next read. */ - int act_len; - int packet_type; - int ret; - u8 *buffer; - - buffer = kmalloc(SQ905C_MAX_TRANSFER, GFP_KERNEL | GFP_DMA); - if (!buffer) { - pr_err("Couldn't allocate USB buffer\n"); - goto quit_stream; - } - - while (gspca_dev->dev && gspca_dev->streaming) { -#ifdef CONFIG_PM - if (gspca_dev->frozen) - break; -#endif - /* Request the header, which tells the size to download */ - ret = usb_bulk_msg(gspca_dev->dev, - usb_rcvbulkpipe(gspca_dev->dev, 0x81), - buffer, FRAME_HEADER_LEN, &act_len, - SQ905C_DATA_TIMEOUT); - PDEBUG(D_STREAM, - "Got %d bytes out of %d for header", - act_len, FRAME_HEADER_LEN); - if (ret < 0 || act_len < FRAME_HEADER_LEN) - goto quit_stream; - /* size is read from 4 bytes starting 0x40, little endian */ - bytes_left = buffer[0x40]|(buffer[0x41]<<8)|(buffer[0x42]<<16) - |(buffer[0x43]<<24); - PDEBUG(D_STREAM, "bytes_left = 0x%x", bytes_left); - /* We keep the header. It has other information, too. */ - packet_type = FIRST_PACKET; - gspca_frame_add(gspca_dev, packet_type, - buffer, FRAME_HEADER_LEN); - while (bytes_left > 0 && gspca_dev->dev) { - data_len = bytes_left > SQ905C_MAX_TRANSFER ? - SQ905C_MAX_TRANSFER : bytes_left; - ret = usb_bulk_msg(gspca_dev->dev, - usb_rcvbulkpipe(gspca_dev->dev, 0x81), - buffer, data_len, &act_len, - SQ905C_DATA_TIMEOUT); - if (ret < 0 || act_len < data_len) - goto quit_stream; - PDEBUG(D_STREAM, - "Got %d bytes out of %d for frame", - data_len, bytes_left); - bytes_left -= data_len; - if (bytes_left == 0) - packet_type = LAST_PACKET; - else - packet_type = INTER_PACKET; - gspca_frame_add(gspca_dev, packet_type, - buffer, data_len); - } - } -quit_stream: - if (gspca_dev->dev) { - mutex_lock(&gspca_dev->usb_lock); - sq905c_command(gspca_dev, SQ905C_CLEAR, 0); - mutex_unlock(&gspca_dev->usb_lock); - } - kfree(buffer); -} - -/* This function is called at probe time just before sd_init */ -static int sd_config(struct gspca_dev *gspca_dev, - const struct usb_device_id *id) -{ - struct cam *cam = &gspca_dev->cam; - struct sd *dev = (struct sd *) gspca_dev; - int ret; - - PDEBUG(D_PROBE, - "SQ9050 camera detected" - " (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct); - - ret = sq905c_command(gspca_dev, SQ905C_GET_ID, 0); - if (ret < 0) { - PDEBUG(D_ERR, "Get version command failed"); - return ret; - } - - ret = sq905c_read(gspca_dev, 0xf5, 0, 20); - if (ret < 0) { - PDEBUG(D_ERR, "Reading version command failed"); - return ret; - } - /* Note we leave out the usb id and the manufacturing date */ - PDEBUG(D_PROBE, - "SQ9050 ID string: %02x - %*ph", - gspca_dev->usb_buf[3], 6, gspca_dev->usb_buf + 14); - - cam->cam_mode = sq905c_mode; - cam->nmodes = 2; - if (gspca_dev->usb_buf[15] == 0) - cam->nmodes = 1; - /* We don't use the buffer gspca allocates so make it small. */ - cam->bulk_size = 32; - cam->bulk = 1; - INIT_WORK(&dev->work_struct, sq905c_dostream); - 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 sd *dev = (struct sd *) gspca_dev; - - /* wait for the work queue to terminate */ - mutex_unlock(&gspca_dev->usb_lock); - /* This waits for sq905c_dostream to finish */ - destroy_workqueue(dev->work_thread); - dev->work_thread = NULL; - mutex_lock(&gspca_dev->usb_lock); -} - -/* this function is called at probe and resume time */ -static int sd_init(struct gspca_dev *gspca_dev) -{ - int ret; - - /* connect to the camera and reset it. */ - ret = sq905c_command(gspca_dev, SQ905C_CLEAR, 0); - return ret; -} - -/* Set up for getting frames. */ -static int sd_start(struct gspca_dev *gspca_dev) -{ - struct sd *dev = (struct sd *) gspca_dev; - int ret; - - dev->cap_mode = gspca_dev->cam.cam_mode; - /* "Open the shutter" and set size, to start capture */ - switch (gspca_dev->width) { - case 640: - PDEBUG(D_STREAM, "Start streaming at high resolution"); - dev->cap_mode++; - ret = sq905c_command(gspca_dev, SQ905C_CAPTURE_HI, - SQ905C_CAPTURE_INDEX); - break; - default: /* 320 */ - PDEBUG(D_STREAM, "Start streaming at medium resolution"); - ret = sq905c_command(gspca_dev, SQ905C_CAPTURE_MED, - SQ905C_CAPTURE_INDEX); - } - - if (ret < 0) { - PDEBUG(D_ERR, "Start streaming command failed"); - return ret; - } - /* 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; -} - -/* Table of supported USB devices */ -static const struct usb_device_id device_table[] = { - {USB_DEVICE(0x2770, 0x905c)}, - {USB_DEVICE(0x2770, 0x9050)}, - {USB_DEVICE(0x2770, 0x9051)}, - {USB_DEVICE(0x2770, 0x9052)}, - {USB_DEVICE(0x2770, 0x913d)}, - {} -}; - -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 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, - .reset_resume = gspca_resume, -#endif -}; - -module_usb_driver(sd_driver); |