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475 lines
13 KiB
475 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Pixart PAC207BCA library |
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* |
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* Copyright (C) 2008 Hans de Goede <[email protected]> |
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* Copyright (C) 2005 Thomas Kaiser [email protected] |
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* Copyleft (C) 2005 Michel Xhaard [email protected] |
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* |
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* V4L2 by Jean-Francois Moine <http://moinejf.free.fr> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#define MODULE_NAME "pac207" |
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#include <linux/input.h> |
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#include "gspca.h" |
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/* Include pac common sof detection functions */ |
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#include "pac_common.h" |
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MODULE_AUTHOR("Hans de Goede <[email protected]>"); |
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MODULE_DESCRIPTION("Pixart PAC207"); |
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MODULE_LICENSE("GPL"); |
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#define PAC207_CTRL_TIMEOUT 100 /* ms */ |
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#define PAC207_BRIGHTNESS_MIN 0 |
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#define PAC207_BRIGHTNESS_MAX 255 |
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#define PAC207_BRIGHTNESS_DEFAULT 46 |
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#define PAC207_BRIGHTNESS_REG 0x08 |
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#define PAC207_EXPOSURE_MIN 3 |
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#define PAC207_EXPOSURE_MAX 90 /* 1 sec expo time / 1 fps */ |
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#define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 */ |
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#define PAC207_EXPOSURE_REG 0x02 |
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#define PAC207_GAIN_MIN 0 |
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#define PAC207_GAIN_MAX 31 |
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#define PAC207_GAIN_DEFAULT 7 /* power on default: 9 */ |
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#define PAC207_GAIN_REG 0x0e |
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#define PAC207_AUTOGAIN_DEADZONE 30 |
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/* global parameters */ |
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static int led_invert; |
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module_param(led_invert, int, 0644); |
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MODULE_PARM_DESC(led_invert, "Invert led"); |
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/* specific webcam descriptor */ |
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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 v4l2_ctrl *brightness; |
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u8 mode; |
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u8 sof_read; |
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u8 header_read; |
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u8 autogain_ignore_frames; |
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atomic_t avg_lum; |
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}; |
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static const struct v4l2_pix_format sif_mode[] = { |
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{176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE, |
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.bytesperline = 176, |
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.sizeimage = (176 + 2) * 144, |
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/* uncompressed, add 2 bytes / line for line header */ |
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.colorspace = V4L2_COLORSPACE_SRGB, |
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.priv = 1}, |
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{352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE, |
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.bytesperline = 352, |
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/* compressed, but only when needed (not compressed |
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when the framerate is low) */ |
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.sizeimage = (352 + 2) * 288, |
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.colorspace = V4L2_COLORSPACE_SRGB, |
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.priv = 0}, |
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}; |
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static const __u8 pac207_sensor_init[][8] = { |
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{0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84}, |
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{0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30}, |
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{0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00}, |
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{0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00}, |
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}; |
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static void pac207_write_regs(struct gspca_dev *gspca_dev, u16 index, |
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const u8 *buffer, u16 length) |
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{ |
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struct usb_device *udev = gspca_dev->dev; |
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int err; |
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if (gspca_dev->usb_err < 0) |
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return; |
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memcpy(gspca_dev->usb_buf, buffer, length); |
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err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01, |
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
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0x00, index, |
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gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT); |
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if (err < 0) { |
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pr_err("Failed to write registers to index 0x%04X, error %d\n", |
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index, err); |
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gspca_dev->usb_err = err; |
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} |
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} |
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static void pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value) |
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{ |
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struct usb_device *udev = gspca_dev->dev; |
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int err; |
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if (gspca_dev->usb_err < 0) |
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return; |
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err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, |
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
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value, index, NULL, 0, PAC207_CTRL_TIMEOUT); |
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if (err) { |
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pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n", |
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index, value, err); |
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gspca_dev->usb_err = err; |
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} |
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} |
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static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index) |
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{ |
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struct usb_device *udev = gspca_dev->dev; |
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int res; |
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if (gspca_dev->usb_err < 0) |
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return 0; |
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res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, |
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
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0x00, index, |
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gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT); |
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if (res < 0) { |
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pr_err("Failed to read a register (index 0x%04X, error %d)\n", |
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index, res); |
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gspca_dev->usb_err = res; |
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return 0; |
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} |
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return gspca_dev->usb_buf[0]; |
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} |
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/* this function is called at probe time */ |
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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; |
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u8 idreg[2]; |
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idreg[0] = pac207_read_reg(gspca_dev, 0x0000); |
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idreg[1] = pac207_read_reg(gspca_dev, 0x0001); |
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idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4); |
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idreg[1] = idreg[1] & 0x0f; |
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gspca_dbg(gspca_dev, D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X\n", |
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idreg[0], idreg[1]); |
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if (idreg[0] != 0x27) { |
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gspca_dbg(gspca_dev, D_PROBE, "Error invalid sensor ID!\n"); |
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return -ENODEV; |
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} |
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gspca_dbg(gspca_dev, D_PROBE, |
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"Pixart PAC207BCA Image Processor and Control Chip detected (vid/pid 0x%04X:0x%04X)\n", |
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id->idVendor, id->idProduct); |
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cam = &gspca_dev->cam; |
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cam->cam_mode = sif_mode; |
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cam->nmodes = ARRAY_SIZE(sif_mode); |
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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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u8 mode; |
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/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */ |
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if (led_invert) |
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mode = 0x02; |
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else |
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mode = 0x00; |
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pac207_write_reg(gspca_dev, 0x41, mode); |
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pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ |
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return gspca_dev->usb_err; |
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} |
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static void setcontrol(struct gspca_dev *gspca_dev, u16 reg, u16 val) |
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{ |
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pac207_write_reg(gspca_dev, reg, val); |
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pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ |
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pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ |
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} |
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static int sd_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct gspca_dev *gspca_dev = |
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container_of(ctrl->handler, struct gspca_dev, ctrl_handler); |
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struct sd *sd = (struct sd *)gspca_dev; |
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gspca_dev->usb_err = 0; |
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if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) { |
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/* when switching to autogain set defaults to make sure |
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we are on a valid point of the autogain gain / |
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exposure knee graph, and give this change time to |
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take effect before doing autogain. */ |
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gspca_dev->exposure->val = PAC207_EXPOSURE_DEFAULT; |
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gspca_dev->gain->val = PAC207_GAIN_DEFAULT; |
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sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; |
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} |
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if (!gspca_dev->streaming) |
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return 0; |
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switch (ctrl->id) { |
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case V4L2_CID_BRIGHTNESS: |
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setcontrol(gspca_dev, PAC207_BRIGHTNESS_REG, ctrl->val); |
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break; |
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case V4L2_CID_AUTOGAIN: |
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if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val)) |
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setcontrol(gspca_dev, PAC207_EXPOSURE_REG, |
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gspca_dev->exposure->val); |
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if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val)) |
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setcontrol(gspca_dev, PAC207_GAIN_REG, |
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gspca_dev->gain->val); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return gspca_dev->usb_err; |
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} |
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static const struct v4l2_ctrl_ops sd_ctrl_ops = { |
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.s_ctrl = sd_s_ctrl, |
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}; |
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/* this function is called at probe time */ |
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static int sd_init_controls(struct gspca_dev *gspca_dev) |
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{ |
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struct sd *sd = (struct sd *) gspca_dev; |
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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, 4); |
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sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, |
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V4L2_CID_BRIGHTNESS, |
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PAC207_BRIGHTNESS_MIN, PAC207_BRIGHTNESS_MAX, |
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1, PAC207_BRIGHTNESS_DEFAULT); |
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gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, |
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V4L2_CID_AUTOGAIN, 0, 1, 1, 1); |
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gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, |
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V4L2_CID_EXPOSURE, |
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PAC207_EXPOSURE_MIN, PAC207_EXPOSURE_MAX, |
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1, PAC207_EXPOSURE_DEFAULT); |
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gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, |
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V4L2_CID_GAIN, |
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PAC207_GAIN_MIN, PAC207_GAIN_MAX, |
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1, PAC207_GAIN_DEFAULT); |
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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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v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false); |
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return 0; |
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} |
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/* -- start the camera -- */ |
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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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__u8 mode; |
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pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */ |
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pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8); |
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pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8); |
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pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8); |
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pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8); |
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/* Compression Balance */ |
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if (gspca_dev->pixfmt.width == 176) |
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pac207_write_reg(gspca_dev, 0x4a, 0xff); |
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else |
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pac207_write_reg(gspca_dev, 0x4a, 0x30); |
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pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */ |
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pac207_write_reg(gspca_dev, 0x08, v4l2_ctrl_g_ctrl(sd->brightness)); |
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/* PGA global gain (Bit 4-0) */ |
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pac207_write_reg(gspca_dev, 0x0e, |
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v4l2_ctrl_g_ctrl(gspca_dev->gain)); |
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pac207_write_reg(gspca_dev, 0x02, |
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v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */ |
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/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */ |
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if (led_invert) |
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mode = 0x00; |
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else |
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mode = 0x02; |
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if (gspca_dev->pixfmt.width == 176) { /* 176x144 */ |
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mode |= 0x01; |
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gspca_dbg(gspca_dev, D_STREAM, "pac207_start mode 176x144\n"); |
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} else { /* 352x288 */ |
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gspca_dbg(gspca_dev, D_STREAM, "pac207_start mode 352x288\n"); |
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} |
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pac207_write_reg(gspca_dev, 0x41, mode); |
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pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */ |
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pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */ |
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msleep(10); |
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pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */ |
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sd->sof_read = 0; |
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sd->autogain_ignore_frames = 0; |
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atomic_set(&sd->avg_lum, -1); |
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return gspca_dev->usb_err; |
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} |
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static void sd_stopN(struct gspca_dev *gspca_dev) |
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{ |
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u8 mode; |
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/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */ |
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if (led_invert) |
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mode = 0x02; |
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else |
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mode = 0x00; |
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pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */ |
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pac207_write_reg(gspca_dev, 0x41, mode); /* Turn off LED */ |
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pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ |
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} |
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static void pac207_do_auto_gain(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 avg_lum = atomic_read(&sd->avg_lum); |
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if (avg_lum == -1) |
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return; |
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if (sd->autogain_ignore_frames > 0) |
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sd->autogain_ignore_frames--; |
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else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum, |
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90, PAC207_AUTOGAIN_DEADZONE)) |
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sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; |
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} |
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static void sd_pkt_scan(struct gspca_dev *gspca_dev, |
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u8 *data, |
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int len) |
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{ |
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struct sd *sd = (struct sd *) gspca_dev; |
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unsigned char *sof; |
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sof = pac_find_sof(gspca_dev, &sd->sof_read, data, len); |
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if (sof) { |
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int n; |
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/* finish decoding current frame */ |
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n = sof - data; |
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if (n > sizeof pac_sof_marker) |
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n -= sizeof pac_sof_marker; |
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else |
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n = 0; |
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gspca_frame_add(gspca_dev, LAST_PACKET, |
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data, n); |
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sd->header_read = 0; |
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gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0); |
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len -= sof - data; |
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data = sof; |
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} |
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if (sd->header_read < 11) { |
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int needed; |
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/* get average lumination from frame header (byte 5) */ |
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if (sd->header_read < 5) { |
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needed = 5 - sd->header_read; |
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if (len >= needed) |
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atomic_set(&sd->avg_lum, data[needed - 1]); |
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} |
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/* skip the rest of the header */ |
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needed = 11 - sd->header_read; |
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if (len <= needed) { |
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sd->header_read += len; |
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return; |
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} |
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data += needed; |
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len -= needed; |
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sd->header_read = 11; |
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} |
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gspca_frame_add(gspca_dev, INTER_PACKET, data, len); |
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} |
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#if IS_ENABLED(CONFIG_INPUT) |
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static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, |
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u8 *data, /* interrupt packet data */ |
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int len) /* interrupt packet length */ |
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{ |
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int ret = -EINVAL; |
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if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) { |
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input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1); |
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input_sync(gspca_dev->input_dev); |
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input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); |
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input_sync(gspca_dev->input_dev); |
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ret = 0; |
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} |
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return ret; |
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} |
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#endif |
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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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.stopN = sd_stopN, |
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.dq_callback = pac207_do_auto_gain, |
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.pkt_scan = sd_pkt_scan, |
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#if IS_ENABLED(CONFIG_INPUT) |
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.int_pkt_scan = sd_int_pkt_scan, |
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#endif |
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}; |
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/* -- module initialisation -- */ |
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static const struct usb_device_id device_table[] = { |
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{USB_DEVICE(0x041e, 0x4028)}, |
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{USB_DEVICE(0x093a, 0x2460)}, |
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{USB_DEVICE(0x093a, 0x2461)}, |
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{USB_DEVICE(0x093a, 0x2463)}, |
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{USB_DEVICE(0x093a, 0x2464)}, |
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{USB_DEVICE(0x093a, 0x2468)}, |
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{USB_DEVICE(0x093a, 0x2470)}, |
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{USB_DEVICE(0x093a, 0x2471)}, |
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{USB_DEVICE(0x093a, 0x2472)}, |
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{USB_DEVICE(0x093a, 0x2474)}, |
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{USB_DEVICE(0x093a, 0x2476)}, |
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{USB_DEVICE(0x145f, 0x013a)}, |
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{USB_DEVICE(0x2001, 0xf115)}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(usb, device_table); |
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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, &sd_desc, 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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