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linux/drivers/media/video/gspca/pac207.c
Hans de Goede 8bb58964bc [media] gspca: Add reset_resume callback to all sub-drivers 
1) The gspca-core's suspend/resume code is such that resume being called after
a reset is safe / ok.

2) All devices tested sofar seem to need the reset_resume callback to work
properly over a suspend

3) The USB-core won't call the reset_resume callback for devices which don't
need it

Thus it seems the simplest and the best to just add the callback to all
sub-drivers, rather then adding the callbacks one-by-one as each driver gets
tested with suspend/resume.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-07-30 18:39:22 -03:00

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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.
*
* 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 "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
/* 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;
PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
idreg[0], idreg[1]);
if (idreg[0] != 0x27) {
PDEBUG(D_PROBE, "Error invalid sensor ID!");
return -ENODEV;
}
PDEBUG(D_PROBE,
"Pixart PAC207BCA Image Processor and Control Chip detected"
" (vid/pid 0x%04X:0x%04X)", 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)
{
pac207_write_reg(gspca_dev, 0x41, 0x00);
/* Bit_0=Image Format,
* Bit_1=LED,
* Bit_2=Compression test mode enable */
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,
gspca_dev->exposure->val);
if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))
setcontrol(gspca_dev, PAC207_GAIN_REG,
gspca_dev->gain->val);
break;
default:
return -EINVAL;
}
return gspca_dev->usb_err;
}
static const struct v4l2_ctrl_ops sd_ctrl_ops = {
.s_ctrl = sd_s_ctrl,
};
/* this function is called at probe time */
static int sd_init_controls(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
gspca_dev->vdev.ctrl_handler = hdl;
v4l2_ctrl_handler_init(hdl, 4);
sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_BRIGHTNESS,
PAC207_BRIGHTNESS_MIN, PAC207_BRIGHTNESS_MAX,
1, PAC207_BRIGHTNESS_DEFAULT);
gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_EXPOSURE,
PAC207_EXPOSURE_MIN, PAC207_EXPOSURE_MAX,
1, PAC207_EXPOSURE_DEFAULT);
gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_GAIN,
PAC207_GAIN_MIN, PAC207_GAIN_MAX,
1, PAC207_GAIN_DEFAULT);
if (hdl->error) {
pr_err("Could not initialize controls\n");
return hdl->error;
}
v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);
return 0;
}
/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
__u8 mode;
pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8);
/* Compression Balance */
if (gspca_dev->width == 176)
pac207_write_reg(gspca_dev, 0x4a, 0xff);
else
pac207_write_reg(gspca_dev, 0x4a, 0x30);
pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
pac207_write_reg(gspca_dev, 0x08, v4l2_ctrl_g_ctrl(sd->brightness));
/* PGA global gain (Bit 4-0) */
pac207_write_reg(gspca_dev, 0x0e,
v4l2_ctrl_g_ctrl(gspca_dev->gain));
pac207_write_reg(gspca_dev, 0x02,
v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */
mode = 0x02; /* Image Format (Bit 0), LED (1), Compr. test mode (2) */
if (gspca_dev->width == 176) { /* 176x144 */
mode |= 0x01;
PDEBUG(D_STREAM, "pac207_start mode 176x144");
} else { /* 352x288 */
PDEBUG(D_STREAM, "pac207_start mode 352x288");
}
pac207_write_reg(gspca_dev, 0x41, mode);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
msleep(10);
pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */
sd->sof_read = 0;
sd->autogain_ignore_frames = 0;
atomic_set(&sd->avg_lum, -1);
return gspca_dev->usb_err;
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
pac207_write_reg(gspca_dev, 0x41, 0x00); /* Turn of LED */
pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
}
static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int avg_lum = atomic_read(&sd->avg_lum);
if (avg_lum == -1)
return;
if (sd->autogain_ignore_frames > 0)
sd->autogain_ignore_frames--;
else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum,
90, PAC207_AUTOGAIN_DEADZONE))
sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
}
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data,
int len)
{
struct sd *sd = (struct sd *) gspca_dev;
unsigned char *sof;
sof = pac_find_sof(&sd->sof_read, data, len);
if (sof) {
int n;
/* finish decoding current frame */
n = sof - data;
if (n > sizeof pac_sof_marker)
n -= sizeof pac_sof_marker;
else
n = 0;
gspca_frame_add(gspca_dev, LAST_PACKET,
data, n);
sd->header_read = 0;
gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
len -= sof - data;
data = sof;
}
if (sd->header_read < 11) {
int needed;
/* get average lumination from frame header (byte 5) */
if (sd->header_read < 5) {
needed = 5 - sd->header_read;
if (len >= needed)
atomic_set(&sd->avg_lum, data[needed - 1]);
}
/* skip the rest of the header */
needed = 11 - sd->header_read;
if (len <= needed) {
sd->header_read += len;
return;
}
data += needed;
len -= needed;
sd->header_read = 11;
}
gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* interrupt packet data */
int len) /* interrput packet length */
{
int ret = -EINVAL;
if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) {
input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
input_sync(gspca_dev->input_dev);
input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
input_sync(gspca_dev->input_dev);
ret = 0;
}
return ret;
}
#endif
/* 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,
.stopN = sd_stopN,
.dq_callback = pac207_do_auto_gain,
.pkt_scan = sd_pkt_scan,
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
.int_pkt_scan = sd_int_pkt_scan,
#endif
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(0x041e, 0x4028)},
{USB_DEVICE(0x093a, 0x2460)},
{USB_DEVICE(0x093a, 0x2461)},
{USB_DEVICE(0x093a, 0x2463)},
{USB_DEVICE(0x093a, 0x2464)},
{USB_DEVICE(0x093a, 0x2468)},
{USB_DEVICE(0x093a, 0x2470)},
{USB_DEVICE(0x093a, 0x2471)},
{USB_DEVICE(0x093a, 0x2472)},
{USB_DEVICE(0x093a, 0x2474)},
{USB_DEVICE(0x093a, 0x2476)},
{USB_DEVICE(0x145f, 0x013a)},
{USB_DEVICE(0x2001, 0xf115)},
{}
};
MODULE_DEVICE_TABLE(usb, device_table);
/* -- 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);
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