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/*
* Pixart PAC207BCA library
*
* Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
* Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
* Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr
*
* V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
*
* 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
* (at your option) 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 "pac207"
#include <linux/input.h>
#include "gspca.h"
/* Include pac common sof detection functions */
#include "pac_common.h"
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Pixart PAC207");
MODULE_LICENSE("GPL");
#define PAC207_CTRL_TIMEOUT 100 /* ms */
#define PAC207_BRIGHTNESS_MIN 0
#define PAC207_BRIGHTNESS_MAX 255
#define PAC207_BRIGHTNESS_DEFAULT 46
#define PAC207_BRIGHTNESS_REG 0x08
#define PAC207_EXPOSURE_MIN 3
#define PAC207_EXPOSURE_MAX 90 /* 1 sec expo time / 1 fps */
#define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 */
#define PAC207_EXPOSURE_REG 0x02
#define PAC207_GAIN_MIN 0
#define PAC207_GAIN_MAX 31
#define PAC207_GAIN_DEFAULT 7 /* power on default: 9 */
#define PAC207_GAIN_REG 0x0e
#define PAC207_AUTOGAIN_DEADZONE 30
/* global parameters */
static int led_invert;
module_param(led_invert, int, 0644);
MODULE_PARM_DESC(led_invert, "Invert led");
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct v4l2_ctrl *brightness;
u8 mode;
u8 sof_read;
u8 header_read;
u8 autogain_ignore_frames;
atomic_t avg_lum;
};
static const struct v4l2_pix_format sif_mode[] = {
{176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
.bytesperline = 176,
.sizeimage = (176 + 2) * 144,
/* uncompressed, add 2 bytes / line for line header */
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 1},
{352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
.bytesperline = 352,
/* compressed, but only when needed (not compressed
when the framerate is low) */
.sizeimage = (352 + 2) * 288,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0},
};
static const __u8 pac207_sensor_init[][8] = {
{0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84},
{0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
{0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
{0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00},
};
static void pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
const u8 *buffer, u16 length)
{
struct usb_device *udev = gspca_dev->dev;
int err;
if (gspca_dev->usb_err < 0)
return;
memcpy(gspca_dev->usb_buf, buffer, length);
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
0x00, index,
gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT);
if (err < 0) {
pr_err("Failed to write registers to index 0x%04X, error %d\n",
index, err);
gspca_dev->usb_err = err;
}
}
static void pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
{
struct usb_device *udev = gspca_dev->dev;
int err;
if (gspca_dev->usb_err < 0)
return;
err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
if (err) {
pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n",
index, value, err);
gspca_dev->usb_err = err;
}
}
static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
{
struct usb_device *udev = gspca_dev->dev;
int res;
if (gspca_dev->usb_err < 0)
return 0;
res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
0x00, index,
gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT);
if (res < 0) {
pr_err("Failed to read a register (index 0x%04X, error %d)\n",
index, res);
gspca_dev->usb_err = res;
return 0;
}
return gspca_dev->usb_buf[0];
}
/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
struct cam *cam;
u8 idreg[2];
idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4);
idreg[1] = idreg[1] & 0x0f;
gspca_dbg(gspca_dev, D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X\n",
idreg[0], idreg[1]);
if (idreg[0] != 0x27) {
gspca_dbg(gspca_dev, D_PROBE, "Error invalid sensor ID!\n");
return -ENODEV;
}
gspca_dbg(gspca_dev, D_PROBE,
"Pixart PAC207BCA Image Processor and Control Chip detected (vid/pid 0x%04X:0x%04X)\n",
id->idVendor, id->idProduct);
cam = &gspca_dev->cam;
cam->cam_mode = sif_mode;
cam->nmodes = ARRAY_SIZE(sif_mode);
return 0;
}
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
u8 mode;
/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
if (led_invert)
mode = 0x02;
else
mode = 0x00;
pac207_write_reg(gspca_dev, 0x41, mode);
pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
return gspca_dev->usb_err;
}
static void setcontrol(struct gspca_dev *gspca_dev, u16 reg, u16 val)
{
pac207_write_reg(gspca_dev, reg, val);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
}
static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct gspca_dev *gspca_dev =
container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
struct sd *sd = (struct sd *)gspca_dev;
gspca_dev->usb_err = 0;
if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {
/* when switching to autogain set defaults to make sure
we are on a valid point of the autogain gain /
exposure knee graph, and give this change time to
take effect before doing autogain. */
gspca_dev->exposure->val = PAC207_EXPOSURE_DEFAULT;
gspca_dev->gain->val = PAC207_GAIN_DEFAULT;
sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
}
if (!gspca_dev->streaming)
return 0;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
setcontrol(gspca_dev, PAC207_BRIGHTNESS_REG, ctrl->val);
break;
case V4L2_CID_AUTOGAIN:
if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))
setcontrol(gspca_dev, PAC207_EXPOSURE_REG,
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