diff options
Diffstat (limited to 'drivers/media/video/gspca/vicam.c')
| -rw-r--r-- | drivers/media/video/gspca/vicam.c | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/drivers/media/video/gspca/vicam.c b/drivers/media/video/gspca/vicam.c deleted file mode 100644 index b1a64b9..0000000 --- a/drivers/media/video/gspca/vicam.c +++ /dev/null @@ -1,365 +0,0 @@ -/* - * gspca ViCam subdriver - * - * Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com> - * - * Based on the usbvideo vicam driver, which is: - * - * Copyright (c) 2002 Joe Burks (jburks@wavicle.org), - * Christopher L Cheney (ccheney@cheney.cx), - * Pavel Machek (pavel@ucw.cz), - * John Tyner (jtyner@cs.ucr.edu), - * Monroe Williams (monroe@pobox.com) - * - * 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#define MODULE_NAME "vicam" -#define HEADER_SIZE 64 - -#include <linux/workqueue.h> -#include <linux/slab.h> -#include <linux/firmware.h> -#include <linux/ihex.h> -#include "gspca.h" - -#define VICAM_FIRMWARE "vicam/firmware.fw" - -MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); -MODULE_DESCRIPTION("GSPCA ViCam USB Camera Driver"); -MODULE_LICENSE("GPL"); -MODULE_FIRMWARE(VICAM_FIRMWARE); - -struct sd { - struct gspca_dev gspca_dev; /* !! must be the first item */ - struct work_struct work_struct; - struct workqueue_struct *work_thread; -}; - -/* The vicam sensor has a resolution of 512 x 244, with I believe square - pixels, but this is forced to a 4:3 ratio by optics. So it has - non square pixels :( */ -static struct v4l2_pix_format vicam_mode[] = { - { 256, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE, - .bytesperline = 256, - .sizeimage = 256 * 122, - .colorspace = V4L2_COLORSPACE_SRGB,}, - /* 2 modes with somewhat more square pixels */ - { 256, 200, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE, - .bytesperline = 256, - .sizeimage = 256 * 200, - .colorspace = V4L2_COLORSPACE_SRGB,}, - { 256, 240, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE, - .bytesperline = 256, - .sizeimage = 256 * 240, - .colorspace = V4L2_COLORSPACE_SRGB,}, -#if 0 /* This mode has extremely non square pixels, testing use only */ - { 512, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE, - .bytesperline = 512, - .sizeimage = 512 * 122, - .colorspace = V4L2_COLORSPACE_SRGB,}, -#endif - { 512, 244, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE, - .bytesperline = 512, - .sizeimage = 512 * 244, - .colorspace = V4L2_COLORSPACE_SRGB,}, -}; - -static int vicam_control_msg(struct gspca_dev *gspca_dev, u8 request, - u16 value, u16 index, u8 *data, u16 len) -{ - int ret; - - ret = usb_control_msg(gspca_dev->dev, - usb_sndctrlpipe(gspca_dev->dev, 0), - request, - USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - value, index, data, len, 1000); - if (ret < 0) - pr_err("control msg req %02X error %d\n", request, ret); - - return ret; -} - -static int vicam_set_camera_power(struct gspca_dev *gspca_dev, int state) -{ - int ret; - - ret = vicam_control_msg(gspca_dev, 0x50, state, 0, NULL, 0); - if (ret < 0) - return ret; - - if (state) - ret = vicam_control_msg(gspca_dev, 0x55, 1, 0, NULL, 0); - - return ret; -} - -/* - * request and read a block of data - see warning on vicam_command. - */ -static int vicam_read_frame(struct gspca_dev *gspca_dev, u8 *data, int size) -{ - int ret, unscaled_height, act_len = 0; - u8 *req_data = gspca_dev->usb_buf; - s32 expo = v4l2_ctrl_g_ctrl(gspca_dev->exposure); - s32 gain = v4l2_ctrl_g_ctrl(gspca_dev->gain); - - memset(req_data, 0, 16); - req_data[0] = gain; - if (gspca_dev->width == 256) - req_data[1] |= 0x01; /* low nibble x-scale */ - if (gspca_dev->height <= 122) { - req_data[1] |= 0x10; /* high nibble y-scale */ - unscaled_height = gspca_dev->height * 2; - } else - unscaled_height = gspca_dev->height; - req_data[2] = 0x90; /* unknown, does not seem to do anything */ - if (unscaled_height <= 200) - req_data[3] = 0x06; /* vend? */ - else if (unscaled_height <= 242) /* Yes 242 not 240 */ - req_data[3] = 0x07; /* vend? */ - else /* Up to 244 lines with req_data[3] == 0x08 */ - req_data[3] = 0x08; /* vend? */ - - if (expo < 256) { - /* Frame rate maxed out, use partial frame expo time */ - req_data[4] = 255 - expo; - req_data[5] = 0x00; - req_data[6] = 0x00; - req_data[7] = 0x01; - } else { - /* Modify frame rate */ - req_data[4] = 0x00; - req_data[5] = 0x00; - req_data[6] = expo & 0xFF; - req_data[7] = expo >> 8; - } - req_data[8] = ((244 - unscaled_height) / 2) & ~0x01; /* vstart */ - /* bytes 9-15 do not seem to affect exposure or image quality */ - - mutex_lock(&gspca_dev->usb_lock); - ret = vicam_control_msg(gspca_dev, 0x51, 0x80, 0, req_data, 16); - mutex_unlock(&gspca_dev->usb_lock); - if (ret < 0) - return ret; - - ret = usb_bulk_msg(gspca_dev->dev, - usb_rcvbulkpipe(gspca_dev->dev, 0x81), - data, size, &act_len, 10000); - /* successful, it returns 0, otherwise negative */ - if (ret < 0 || act_len != size) { - pr_err("bulk read fail (%d) len %d/%d\n", - ret, act_len, size); - return -EIO; - } - 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 we take the gspca - * usb_lock when performing USB operations. In practice the only thing we need - * to protect against is the usb_set_interface call that gspca makes during - * stream_off as the camera doesn't provide any controls that the user could try - * to change. - */ -static void vicam_dostream(struct work_struct *work) -{ - struct sd *sd = container_of(work, struct sd, work_struct); - struct gspca_dev *gspca_dev = &sd->gspca_dev; - int ret, frame_sz; - u8 *buffer; - - frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage + - HEADER_SIZE; - buffer = kmalloc(frame_sz, GFP_KERNEL | GFP_DMA); - if (!buffer) { - pr_err("Couldn't allocate USB buffer\n"); - goto exit; - } - - while (gspca_dev->dev && gspca_dev->streaming) { -#ifdef CONFIG_PM - if (gspca_dev->frozen) - break; -#endif - ret = vicam_read_frame(gspca_dev, buffer, frame_sz); - if (ret < 0) - break; - - /* Note the frame header contents seem to be completely - constant, they do not change with either image, or - settings. So we simply discard it. The frames have - a very similar 64 byte footer, which we don't even - bother reading from the cam */ - gspca_frame_add(gspca_dev, FIRST_PACKET, - buffer + HEADER_SIZE, - frame_sz - HEADER_SIZE); - gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); - } -exit: - 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 *sd = (struct sd *)gspca_dev; - - /* We don't use the buffer gspca allocates so make it small. */ - cam->bulk = 1; - cam->bulk_size = 64; - cam->cam_mode = vicam_mode; - cam->nmodes = ARRAY_SIZE(vicam_mode); - - INIT_WORK(&sd->work_struct, vicam_dostream); - - return 0; -} - -/* this function is called at probe and resume time */ -static int sd_init(struct gspca_dev *gspca_dev) -{ - int ret; - const struct ihex_binrec *rec; - const struct firmware *uninitialized_var(fw); - u8 *firmware_buf; - - ret = request_ihex_firmware(&fw, VICAM_FIRMWARE, - &gspca_dev->dev->dev); - if (ret) { - pr_err("Failed to load \"vicam/firmware.fw\": %d\n", ret); - return ret; - } - - firmware_buf = kmalloc(PAGE_SIZE, GFP_KERNEL); - if (!firmware_buf) { - ret = -ENOMEM; - goto exit; - } - for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) { - memcpy(firmware_buf, rec->data, be16_to_cpu(rec->len)); - ret = vicam_control_msg(gspca_dev, 0xff, 0, 0, firmware_buf, - be16_to_cpu(rec->len)); - if (ret < 0) - break; - } - - kfree(firmware_buf); -exit: - release_firmware(fw); - return ret; -} - -/* Set up for getting frames. */ -static int sd_start(struct gspca_dev *gspca_dev) -{ - struct sd *sd = (struct sd *)gspca_dev; - int ret; - - ret = vicam_set_camera_power(gspca_dev, 1); - if (ret < 0) - return ret; - - /* Start the workqueue function to do the streaming */ - sd->work_thread = create_singlethread_workqueue(MODULE_NAME); - queue_work(sd->work_thread, &sd->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 sd *dev = (struct sd *)gspca_dev; - - /* wait for the work queue to terminate */ - mutex_unlock(&gspca_dev->usb_lock); - /* This waits for vicam_dostream to finish */ - destroy_workqueue(dev->work_thread); - dev->work_thread = NULL; - mutex_lock(&gspca_dev->usb_lock); - - if (gspca_dev->dev) - vicam_set_camera_power(gspca_dev, 0); -} - -static int sd_init_controls(struct gspca_dev *gspca_dev) -{ - struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; - - gspca_dev->vdev.ctrl_handler = hdl; - v4l2_ctrl_handler_init(hdl, 2); - gspca_dev->exposure = v4l2_ctrl_new_std(hdl, NULL, - V4L2_CID_EXPOSURE, 0, 2047, 1, 256); - gspca_dev->gain = v4l2_ctrl_new_std(hdl, NULL, - V4L2_CID_GAIN, 0, 255, 1, 200); - - if (hdl->error) { - pr_err("Could not initialize controls\n"); - return hdl->error; - } - return 0; -} - -/* Table of supported USB devices */ -static const struct usb_device_id device_table[] = { - {USB_DEVICE(0x04c1, 0x009d)}, - {USB_DEVICE(0x0602, 0x1001)}, - {} -}; - -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, - .init_controls = sd_init_controls, - .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); |