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fd9871f70c
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 50 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154042.917228456@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
348 lines
9.2 KiB
C
348 lines
9.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* gspca ViCam subdriver
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*
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* Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com>
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*
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* Based on the usbvideo vicam driver, which is:
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*
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* Copyright (c) 2002 Joe Burks (jburks@wavicle.org),
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* Chris Cheney (chris.cheney@gmail.com),
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* Pavel Machek (pavel@ucw.cz),
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* John Tyner (jtyner@cs.ucr.edu),
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* Monroe Williams (monroe@pobox.com)
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#define MODULE_NAME "vicam"
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#define HEADER_SIZE 64
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#include <linux/workqueue.h>
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#include <linux/slab.h>
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#include <linux/firmware.h>
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#include <linux/ihex.h>
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#include "gspca.h"
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#define VICAM_FIRMWARE "vicam/firmware.fw"
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MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
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MODULE_DESCRIPTION("GSPCA ViCam USB Camera Driver");
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MODULE_LICENSE("GPL");
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MODULE_FIRMWARE(VICAM_FIRMWARE);
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struct sd {
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struct gspca_dev gspca_dev; /* !! must be the first item */
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struct work_struct work_struct;
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};
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/* The vicam sensor has a resolution of 512 x 244, with I believe square
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pixels, but this is forced to a 4:3 ratio by optics. So it has
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non square pixels :( */
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static struct v4l2_pix_format vicam_mode[] = {
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{ 256, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
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.bytesperline = 256,
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.sizeimage = 256 * 122,
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.colorspace = V4L2_COLORSPACE_SRGB,},
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/* 2 modes with somewhat more square pixels */
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{ 256, 200, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
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.bytesperline = 256,
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.sizeimage = 256 * 200,
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.colorspace = V4L2_COLORSPACE_SRGB,},
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{ 256, 240, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
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.bytesperline = 256,
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.sizeimage = 256 * 240,
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.colorspace = V4L2_COLORSPACE_SRGB,},
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#if 0 /* This mode has extremely non square pixels, testing use only */
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{ 512, 122, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
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.bytesperline = 512,
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.sizeimage = 512 * 122,
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.colorspace = V4L2_COLORSPACE_SRGB,},
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#endif
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{ 512, 244, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
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.bytesperline = 512,
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.sizeimage = 512 * 244,
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.colorspace = V4L2_COLORSPACE_SRGB,},
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};
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static int vicam_control_msg(struct gspca_dev *gspca_dev, u8 request,
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u16 value, u16 index, u8 *data, u16 len)
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{
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int ret;
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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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request,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, index, data, len, 1000);
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if (ret < 0)
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pr_err("control msg req %02X error %d\n", request, ret);
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return ret;
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}
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static int vicam_set_camera_power(struct gspca_dev *gspca_dev, int state)
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{
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int ret;
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ret = vicam_control_msg(gspca_dev, 0x50, state, 0, NULL, 0);
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if (ret < 0)
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return ret;
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if (state)
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ret = vicam_control_msg(gspca_dev, 0x55, 1, 0, NULL, 0);
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return ret;
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}
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/*
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* request and read a block of data
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*/
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static int vicam_read_frame(struct gspca_dev *gspca_dev, u8 *data, int size)
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{
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int ret, unscaled_height, act_len = 0;
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u8 *req_data = gspca_dev->usb_buf;
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s32 expo = v4l2_ctrl_g_ctrl(gspca_dev->exposure);
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s32 gain = v4l2_ctrl_g_ctrl(gspca_dev->gain);
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memset(req_data, 0, 16);
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req_data[0] = gain;
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if (gspca_dev->pixfmt.width == 256)
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req_data[1] |= 0x01; /* low nibble x-scale */
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if (gspca_dev->pixfmt.height <= 122) {
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req_data[1] |= 0x10; /* high nibble y-scale */
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unscaled_height = gspca_dev->pixfmt.height * 2;
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} else
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unscaled_height = gspca_dev->pixfmt.height;
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req_data[2] = 0x90; /* unknown, does not seem to do anything */
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if (unscaled_height <= 200)
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req_data[3] = 0x06; /* vend? */
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else if (unscaled_height <= 242) /* Yes 242 not 240 */
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req_data[3] = 0x07; /* vend? */
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else /* Up to 244 lines with req_data[3] == 0x08 */
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req_data[3] = 0x08; /* vend? */
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if (expo < 256) {
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/* Frame rate maxed out, use partial frame expo time */
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req_data[4] = 255 - expo;
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req_data[5] = 0x00;
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req_data[6] = 0x00;
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req_data[7] = 0x01;
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} else {
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/* Modify frame rate */
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req_data[4] = 0x00;
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req_data[5] = 0x00;
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req_data[6] = expo & 0xFF;
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req_data[7] = expo >> 8;
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}
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req_data[8] = ((244 - unscaled_height) / 2) & ~0x01; /* vstart */
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/* bytes 9-15 do not seem to affect exposure or image quality */
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mutex_lock(&gspca_dev->usb_lock);
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ret = vicam_control_msg(gspca_dev, 0x51, 0x80, 0, req_data, 16);
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mutex_unlock(&gspca_dev->usb_lock);
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if (ret < 0)
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return ret;
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x81),
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data, size, &act_len, 10000);
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/* successful, it returns 0, otherwise negative */
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if (ret < 0 || act_len != size) {
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pr_err("bulk read fail (%d) len %d/%d\n",
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ret, act_len, size);
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return -EIO;
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}
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return 0;
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}
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/*
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* This function is called as a workqueue function and runs whenever the camera
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* is streaming data. Because it is a workqueue function it is allowed to sleep
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* so we can use synchronous USB calls. To avoid possible collisions with other
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* threads attempting to use gspca_dev->usb_buf we take the usb_lock when
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* performing USB operations using it. In practice we don't really need this
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* as the cameras controls are only written from the workqueue.
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*/
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static void vicam_dostream(struct work_struct *work)
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{
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struct sd *sd = container_of(work, struct sd, work_struct);
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struct gspca_dev *gspca_dev = &sd->gspca_dev;
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int ret, frame_sz;
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u8 *buffer;
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frame_sz = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].sizeimage +
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HEADER_SIZE;
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buffer = kmalloc(frame_sz, GFP_KERNEL);
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if (!buffer) {
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pr_err("Couldn't allocate USB buffer\n");
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goto exit;
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}
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while (gspca_dev->present && gspca_dev->streaming) {
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#ifdef CONFIG_PM
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if (gspca_dev->frozen)
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break;
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#endif
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ret = vicam_read_frame(gspca_dev, buffer, frame_sz);
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if (ret < 0)
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break;
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/* Note the frame header contents seem to be completely
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constant, they do not change with either image, or
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settings. So we simply discard it. The frames have
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a very similar 64 byte footer, which we don't even
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bother reading from the cam */
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gspca_frame_add(gspca_dev, FIRST_PACKET,
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buffer + HEADER_SIZE,
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frame_sz - HEADER_SIZE);
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gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
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}
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exit:
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kfree(buffer);
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}
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/* This function is called at probe time just before sd_init */
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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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struct sd *sd = (struct sd *)gspca_dev;
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/* We don't use the buffer gspca allocates so make it small. */
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cam->bulk = 1;
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cam->bulk_size = 64;
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cam->cam_mode = vicam_mode;
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cam->nmodes = ARRAY_SIZE(vicam_mode);
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INIT_WORK(&sd->work_struct, vicam_dostream);
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return 0;
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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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int ret;
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const struct ihex_binrec *rec;
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const struct firmware *uninitialized_var(fw);
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u8 *firmware_buf;
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ret = request_ihex_firmware(&fw, VICAM_FIRMWARE,
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&gspca_dev->dev->dev);
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if (ret) {
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pr_err("Failed to load \"vicam/firmware.fw\": %d\n", ret);
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return ret;
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}
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firmware_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
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if (!firmware_buf) {
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ret = -ENOMEM;
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goto exit;
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}
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for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {
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memcpy(firmware_buf, rec->data, be16_to_cpu(rec->len));
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ret = vicam_control_msg(gspca_dev, 0xff, 0, 0, firmware_buf,
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be16_to_cpu(rec->len));
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if (ret < 0)
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break;
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}
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kfree(firmware_buf);
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exit:
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release_firmware(fw);
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return ret;
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}
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/* Set up for getting frames. */
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static int sd_start(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *)gspca_dev;
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int ret;
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ret = vicam_set_camera_power(gspca_dev, 1);
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if (ret < 0)
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return ret;
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schedule_work(&sd->work_struct);
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return 0;
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}
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/* called on streamoff with alt==0 and on disconnect */
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/* the usb_lock is held at entry - restore on exit */
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static void sd_stop0(struct gspca_dev *gspca_dev)
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{
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struct sd *dev = (struct sd *)gspca_dev;
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/* wait for the work queue to terminate */
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mutex_unlock(&gspca_dev->usb_lock);
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/* This waits for vicam_dostream to finish */
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flush_work(&dev->work_struct);
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mutex_lock(&gspca_dev->usb_lock);
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if (gspca_dev->present)
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vicam_set_camera_power(gspca_dev, 0);
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}
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static int sd_init_controls(struct gspca_dev *gspca_dev)
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{
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struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
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gspca_dev->vdev.ctrl_handler = hdl;
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v4l2_ctrl_handler_init(hdl, 2);
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gspca_dev->exposure = v4l2_ctrl_new_std(hdl, NULL,
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V4L2_CID_EXPOSURE, 0, 2047, 1, 256);
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gspca_dev->gain = v4l2_ctrl_new_std(hdl, NULL,
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V4L2_CID_GAIN, 0, 255, 1, 200);
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if (hdl->error) {
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pr_err("Could not initialize controls\n");
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return hdl->error;
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}
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return 0;
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}
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/* Table of supported USB devices */
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static const struct usb_device_id device_table[] = {
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{USB_DEVICE(0x04c1, 0x009d)},
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{USB_DEVICE(0x0602, 0x1001)},
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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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.init_controls = sd_init_controls,
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.start = sd_start,
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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 sd),
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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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.reset_resume = gspca_resume,
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#endif
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};
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module_usb_driver(sd_driver);
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