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linuxdebug/drivers/media/usb/gspca/mr97310a.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Mars MR97310A library
*
* The original mr97310a driver, which supported the Aiptek Pencam VGA+, is
* Copyright (C) 2009 Kyle Guinn <elyk03@gmail.com>
*
* Support for the MR97310A cameras in addition to the Aiptek Pencam VGA+
* and for the routines for detecting and classifying these various cameras,
* is Copyright (C) 2009 Theodore Kilgore <kilgota@auburn.edu>
*
* Support for the control settings for the CIF cameras is
* Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com> and
* Thomas Kaiser <thomas@kaiser-linux.li>
*
* Support for the control settings for the VGA cameras is
* Copyright (C) 2009 Theodore Kilgore <kilgota@auburn.edu>
*
* Several previously unsupported cameras are owned and have been tested by
* Hans de Goede <hdegoede@redhat.com> and
* Thomas Kaiser <thomas@kaiser-linux.li> and
* Theodore Kilgore <kilgota@auburn.edu> and
* Edmond Rodriguez <erodrig_97@yahoo.com> and
* Aurelien Jacobs <aurel@gnuage.org>
*
* The MR97311A support in gspca/mars.c has been helpful in understanding some
* of the registers in these cameras.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "mr97310a"
#include "gspca.h"
#define CAM_TYPE_CIF 0
#define CAM_TYPE_VGA 1
#define MR97310A_BRIGHTNESS_DEFAULT 0
#define MR97310A_EXPOSURE_MIN 0
#define MR97310A_EXPOSURE_MAX 4095
#define MR97310A_EXPOSURE_DEFAULT 1000
#define MR97310A_GAIN_MIN 0
#define MR97310A_GAIN_MAX 31
#define MR97310A_GAIN_DEFAULT 25
#define MR97310A_CONTRAST_MIN 0
#define MR97310A_CONTRAST_MAX 31
#define MR97310A_CONTRAST_DEFAULT 23
#define MR97310A_CS_GAIN_MIN 0
#define MR97310A_CS_GAIN_MAX 0x7ff
#define MR97310A_CS_GAIN_DEFAULT 0x110
#define MR97310A_CID_CLOCKDIV (V4L2_CTRL_CLASS_USER + 0x1000)
#define MR97310A_MIN_CLOCKDIV_MIN 3
#define MR97310A_MIN_CLOCKDIV_MAX 8
#define MR97310A_MIN_CLOCKDIV_DEFAULT 3
MODULE_AUTHOR("Kyle Guinn <elyk03@gmail.com>,Theodore Kilgore <kilgota@auburn.edu>");
MODULE_DESCRIPTION("GSPCA/Mars-Semi MR97310A USB Camera Driver");
MODULE_LICENSE("GPL");
/* global parameters */
static int force_sensor_type = -1;
module_param(force_sensor_type, int, 0644);
MODULE_PARM_DESC(force_sensor_type, "Force sensor type (-1 (auto), 0 or 1)");
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct { /* exposure/min_clockdiv control cluster */
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *min_clockdiv;
};
u8 sof_read;
u8 cam_type; /* 0 is CIF and 1 is VGA */
u8 sensor_type; /* We use 0 and 1 here, too. */
u8 do_lcd_stop;
u8 adj_colors;
};
struct sensor_w_data {
u8 reg;
u8 flags;
u8 data[16];
int len;
};
static void sd_stopN(struct gspca_dev *gspca_dev);
static const struct v4l2_pix_format vga_mode[] = {
{160, 120, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
.bytesperline = 160,
.sizeimage = 160 * 120,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 4},
{176, 144, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
.bytesperline = 176,
.sizeimage = 176 * 144,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 3},
{320, 240, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
.bytesperline = 320,
.sizeimage = 320 * 240,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 2},
{352, 288, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
.bytesperline = 352,
.sizeimage = 352 * 288,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 1},
{640, 480, V4L2_PIX_FMT_MR97310A, V4L2_FIELD_NONE,
.bytesperline = 640,
.sizeimage = 640 * 480,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0},
};
/* the bytes to write are in gspca_dev->usb_buf */
static int mr_write(struct gspca_dev *gspca_dev, int len)
{
int rc;
rc = usb_bulk_msg(gspca_dev->dev,
usb_sndbulkpipe(gspca_dev->dev, 4),
gspca_dev->usb_buf, len, NULL, 500);
if (rc < 0)
pr_err("reg write [%02x] error %d\n",
gspca_dev->usb_buf[0], rc);
return rc;
}
/* the bytes are read into gspca_dev->usb_buf */
static int mr_read(struct gspca_dev *gspca_dev, int len)
{
int rc;
rc = usb_bulk_msg(gspca_dev->dev,
usb_rcvbulkpipe(gspca_dev->dev, 3),
gspca_dev->usb_buf, len, NULL, 500);
if (rc < 0)
pr_err("reg read [%02x] error %d\n",
gspca_dev->usb_buf[0], rc);
return rc;
}
static int sensor_write_reg(struct gspca_dev *gspca_dev, u8 reg, u8 flags,
const u8 *data, int len)
{
gspca_dev->usb_buf[0] = 0x1f;
gspca_dev->usb_buf[1] = flags;
gspca_dev->usb_buf[2] = reg;
memcpy(gspca_dev->usb_buf + 3, data, len);
return mr_write(gspca_dev, len + 3);
}
static int sensor_write_regs(struct gspca_dev *gspca_dev,
const struct sensor_w_data *data, int len)
{
int i, rc;
for (i = 0; i < len; i++) {
rc = sensor_write_reg(gspca_dev, data[i].reg, data[i].flags,
data[i].data, data[i].len);
if (rc < 0)
return rc;
}
return 0;
}
static int sensor_write1(struct gspca_dev *gspca_dev, u8 reg, u8 data)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 buf, confirm_reg;
int rc;
buf = data;
if (sd->cam_type == CAM_TYPE_CIF) {
rc = sensor_write_reg(gspca_dev, reg, 0x01, &buf, 1);
confirm_reg = sd->sensor_type ? 0x13 : 0x11;
} else {
rc = sensor_write_reg(gspca_dev, reg, 0x00, &buf, 1);
confirm_reg = 0x11;
}
if (rc < 0)
return rc;
buf = 0x01;
rc = sensor_write_reg(gspca_dev, confirm_reg, 0x00, &buf, 1);
if (rc < 0)
return rc;
return 0;
}
static int cam_get_response16(struct gspca_dev *gspca_dev, u8 reg, int verbose)
{
int err_code;
gspca_dev->usb_buf[0] = reg;
err_code = mr_write(gspca_dev, 1);
if (err_code < 0)
return err_code;
err_code = mr_read(gspca_dev, 16);
if (err_code < 0)
return err_code;
if (verbose)
gspca_dbg(gspca_dev, D_PROBE, "Register: %02x reads %02x%02x%02x\n",
reg,
gspca_dev->usb_buf[0],
gspca_dev->usb_buf[1],
gspca_dev->usb_buf[2]);
return 0;
}
static int zero_the_pointer(struct gspca_dev *gspca_dev)
{
__u8 *data = gspca_dev->usb_buf;
int err_code;
u8 status = 0;
int tries = 0;
err_code = cam_get_response16(gspca_dev, 0x21, 0);
if (err_code < 0)
return err_code;
data[0] = 0x19;
data[1] = 0x51;
err_code = mr_write(gspca_dev, 2);
if (err_code < 0)
return err_code;
err_code = cam_get_response16(gspca_dev, 0x21, 0);
if (err_code < 0)
return err_code;
data[0] = 0x19;
data[1] = 0xba;
err_code = mr_write(gspca_dev, 2);
if (err_code < 0)
return err_code;
err_code = cam_get_response16(gspca_dev, 0x21, 0);
if (err_code < 0)
return err_code;
data[0] = 0x19;
data[1] = 0x00;
err_code = mr_write(gspca_dev, 2);
if (err_code < 0)
return err_code;
err_code = cam_get_response16(gspca_dev, 0x21, 0);
if (err_code < 0)
return err_code;
data[0] = 0x19;
data[1] = 0x00;
err_code = mr_write(gspca_dev, 2);
if (err_code < 0)
return err_code;
while (status != 0x0a && tries < 256) {
err_code = cam_get_response16(gspca_dev, 0x21, 0);
status = data[0];
tries++;
if (err_code < 0)
return err_code;
}
if (status != 0x0a)
gspca_err(gspca_dev, "status is %02x\n", status);
tries = 0;
while (tries < 4) {
data[0] = 0x19;
data[1] = 0x00;
err_code = mr_write(gspca_dev, 2);
if (err_code < 0)
return err_code;
err_code = cam_get_response16(gspca_dev, 0x21, 0);
tries++;
if (err_code < 0)
return err_code;
}
data[0] = 0x19;
err_code = mr_write(gspca_dev, 1);
if (err_code < 0)
return err_code;
err_code = mr_read(gspca_dev, 16);
if (err_code < 0)
return err_code;
return 0;
}
static int stream_start(struct gspca_dev *gspca_dev)
{
gspca_dev->usb_buf[0] = 0x01;
gspca_dev->usb_buf[1] = 0x01;
return mr_write(gspca_dev, 2);
}
static void stream_stop(struct gspca_dev *gspca_dev)
{
gspca_dev->usb_buf[0] = 0x01;
gspca_dev->usb_buf[1] = 0x00;
if (mr_write(gspca_dev, 2) < 0)
gspca_err(gspca_dev, "Stream Stop failed\n");
}
static void lcd_stop(struct gspca_dev *gspca_dev)
{
gspca_dev->usb_buf[0] = 0x19;
gspca_dev->usb_buf[1] = 0x54;
if (mr_write(gspca_dev, 2) < 0)
gspca_err(gspca_dev, "LCD Stop failed\n");
}
static int isoc_enable(struct gspca_dev *gspca_dev)
{
gspca_dev->usb_buf[0] = 0x00;
gspca_dev->usb_buf[1] = 0x4d; /* ISOC transferring enable... */
return mr_write(gspca_dev, 2);
}
/* This function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
struct sd *sd = (struct sd *) gspca_dev;
struct cam *cam;
int err_code;
cam = &gspca_dev->cam;
cam->cam_mode = vga_mode;
cam->nmodes = ARRAY_SIZE(vga_mode);
sd->do_lcd_stop = 0;
/* Several of the supported CIF cameras share the same USB ID but
* require different initializations and different control settings.
* The same is true of the VGA cameras. Therefore, we are forced
* to start the initialization process in order to determine which
* camera is present. Some of the supported cameras require the
* memory pointer to be set to 0 as the very first item of business
* or else they will not stream. So we do that immediately.
*/
err_code = zero_the_pointer(gspca_dev);
if (err_code < 0)
return err_code;
err_code = stream_start(gspca_dev);
if (err_code < 0)
return err_code;
/* Now, the query for sensor type. */
err_code = cam_get_response16(gspca_dev, 0x07, 1);
if (err_code < 0)
return err_code;
if (id->idProduct == 0x0110 || id->idProduct == 0x010e) {
sd->cam_type = CAM_TYPE_CIF;
cam->nmodes--;
/*
* All but one of the known CIF cameras share the same USB ID,
* but two different init routines are in use, and the control
* settings are different, too. We need to detect which camera
* of the two known varieties is connected!
*
* A list of known CIF cameras follows. They all report either
* 0200 for type 0 or 0300 for type 1.
* If you have another to report, please do
*
* Name sd->sensor_type reported by
*
* Sakar 56379 Spy-shot 0 T. Kilgore
* Innovage 0 T. Kilgore
* Vivitar Mini 0 H. De Goede
* Vivitar Mini 0 E. Rodriguez
* Vivitar Mini 1 T. Kilgore
* Elta-Media 8212dc 1 T. Kaiser
* Philips dig. keych. 1 T. Kilgore
* Trust Spyc@m 100 1 A. Jacobs
*/
switch (gspca_dev->usb_buf[0]) {
case 2:
sd->sensor_type = 0;
break;
case 3:
sd->sensor_type = 1;
break;
default:
pr_err("Unknown CIF Sensor id : %02x\n",
gspca_dev->usb_buf[1]);
return -ENODEV;
}
gspca_dbg(gspca_dev, D_PROBE, "MR97310A CIF camera detected, sensor: %d\n",
sd->sensor_type);
} else {
sd->cam_type = CAM_TYPE_VGA;
/*
* Here is a table of the responses to the query for sensor
* type, from the known MR97310A VGA cameras. Six different
* cameras of which five share the same USB ID.
*
* Name gspca_dev->usb_buf[] sd->sensor_type
* sd->do_lcd_stop
* Aiptek Pencam VGA+ 0300 0 1
* ION digital 0300 0 1
* Argus DC-1620 0450 1 0
* Argus QuickClix 0420 1 1
* Sakar 77379 Digital 0350 0 1
* Sakar 1638x CyberPix 0120 0 2
*
* Based upon these results, we assume default settings
* and then correct as necessary, as follows.
*
*/
sd->sensor_type = 1;
sd->do_lcd_stop = 0;
sd->adj_colors = 0;
if (gspca_dev->usb_buf[0] == 0x01) {
sd->sensor_type = 2;
} else if ((gspca_dev->usb_buf[0] != 0x03) &&
(gspca_dev->usb_buf[0] != 0x04)) {
pr_err("Unknown VGA Sensor id Byte 0: %02x\n",
gspca_dev->usb_buf[0]);
pr_err("Defaults assumed, may not work\n");
pr_err("Please report this\n");
}
/* Sakar Digital color needs to be adjusted. */
if ((gspca_dev->usb_buf[0] == 0x03) &&
(gspca_dev->usb_buf[1] == 0x50))
sd->adj_colors = 1;
if (gspca_dev->usb_buf[0] == 0x04) {
sd->do_lcd_stop = 1;
switch (gspca_dev->usb_buf[1]) {
case 0x50:
sd->sensor_type = 0;
gspca_dbg(gspca_dev, D_PROBE, "sensor_type corrected to 0\n");
break;
case 0x20:
/* Nothing to do here. */
break;
default:
pr_err("Unknown VGA Sensor id Byte 1: %02x\n",
gspca_dev->usb_buf[1]);
pr_err("Defaults assumed, may not work\n");
pr_err("Please report this\n");
}
}
gspca_dbg(gspca_dev, D_PROBE, "MR97310A VGA camera detected, sensor: %d\n",
sd->sensor_type);
}
/* Stop streaming as we've started it only to probe the sensor type. */
sd_stopN(gspca_dev);
if (force_sensor_type != -1) {
sd->sensor_type = !!force_sensor_type;
gspca_dbg(gspca_dev, D_PROBE, "Forcing sensor type to: %d\n",
sd->sensor_type);
}
return 0;
}
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
return 0;
}
static int start_cif_cam(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
__u8 *data = gspca_dev->usb_buf;
int err_code;
static const __u8 startup_string[] = {
0x00,
0x0d,
0x01,
0x00, /* Hsize/8 for 352 or 320 */
0x00, /* Vsize/4 for 288 or 240 */
0x13, /* or 0xbb, depends on sensor */
0x00, /* Hstart, depends on res. */
0x00, /* reserved ? */
0x00, /* Vstart, depends on res. and sensor */
0x50, /* 0x54 to get 176 or 160 */
0xc0
};
/* Note: Some of the above descriptions guessed from MR97113A driver */
memcpy(data, startup_string, 11);
if (sd->sensor_type)
data[5] = 0xbb;
switch (gspca_dev->pixfmt.width) {
case 160:
data[9] |= 0x04; /* reg 8, 2:1 scale down from 320 */
fallthrough;
case 320:
default:
data[3] = 0x28; /* reg 2, H size/8 */
data[4] = 0x3c; /* reg 3, V size/4 */
data[6] = 0x14; /* reg 5, H start */
data[8] = 0x1a + sd->sensor_type; /* reg 7, V start */
break;
case 176:
data[9] |= 0x04; /* reg 8, 2:1 scale down from 352 */
fallthrough;
case 352:
data[3] = 0x2c; /* reg 2, H size/8 */
data[4] = 0x48; /* reg 3, V size/4 */
data[6] = 0x06; /* reg 5, H start */
data[8] = 0x06 - sd->sensor_type; /* reg 7, V start */
break;
}
err_code = mr_write(gspca_dev, 11);
if (err_code < 0)
return err_code;
if (!sd->sensor_type) {
static const struct sensor_w_data cif_sensor0_init_data[] = {
{0x02, 0x00, {0x03, 0x5a, 0xb5, 0x01,
0x0f, 0x14, 0x0f, 0x10}, 8},
{0x0c, 0x00, {0x04, 0x01, 0x01, 0x00, 0x1f}, 5},
{0x12, 0x00, {0x07}, 1},
{0x1f, 0x00, {0x06}, 1},
{0x27, 0x00, {0x04}, 1},
{0x29, 0x00, {0x0c}, 1},
{0x40, 0x00, {0x40, 0x00, 0x04}, 3},
{0x50, 0x00, {0x60}, 1},
{0x60, 0x00, {0x06}, 1},
{0x6b, 0x00, {0x85, 0x85, 0xc8, 0xc8, 0xc8, 0xc8}, 6},
{0x72, 0x00, {0x1e, 0x56}, 2},
{0x75, 0x00, {0x58, 0x40, 0xa2, 0x02, 0x31, 0x02,
0x31, 0x80, 0x00}, 9},
{0x11, 0x00, {0x01}, 1},
{0, 0, {0}, 0}
};
err_code = sensor_write_regs(gspca_dev, cif_sensor0_init_data,
ARRAY_SIZE(cif_sensor0_init_data));
} else { /* sd->sensor_type = 1 */
static const struct sensor_w_data cif_sensor1_init_data[] = {
/* Reg 3,4, 7,8 get set by the controls */
{0x02, 0x00, {0x10}, 1},
{0x05, 0x01, {0x22}, 1}, /* 5/6 also seen as 65h/32h */
{0x06, 0x01, {0x00}, 1},
{0x09, 0x02, {0x0e}, 1},
{0x0a, 0x02, {0x05}, 1},
{0x0b, 0x02, {0x05}, 1},
{0x0c, 0x02, {0x0f}, 1},
{0x0d, 0x02, {0x07}, 1},
{0x0e, 0x02, {0x0c}, 1},
{0x0f, 0x00, {0x00}, 1},
{0x10, 0x00, {0x06}, 1},
{0x11, 0x00, {0x07}, 1},
{0x12, 0x00, {0x00}, 1},
{0x13, 0x00, {0x01}, 1},
{0, 0, {0}, 0}
};
/* Without this command the cam won't work with USB-UHCI */
gspca_dev->usb_buf[0] = 0x0a;
gspca_dev->usb_buf[1] = 0x00;
err_code = mr_write(gspca_dev, 2);
if (err_code < 0)
return err_code;
err_code = sensor_write_regs(gspca_dev, cif_sensor1_init_data,
ARRAY_SIZE(cif_sensor1_init_data));
}
return err_code;
}
static int start_vga_cam(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
__u8 *data = gspca_dev->usb_buf;
int err_code;
static const __u8 startup_string[] =
{0x00, 0x0d, 0x01, 0x00, 0x00, 0x2b, 0x00, 0x00,
0x00, 0x50, 0xc0};
/* What some of these mean is explained in start_cif_cam(), above */
memcpy(data, startup_string, 11);
if (!sd->sensor_type) {
data[5] = 0x00;
data[10] = 0x91;
}
if (sd->sensor_type == 2) {
data[5] = 0x00;
data[10] = 0x18;
}
switch (gspca_dev->pixfmt.width) {
case 160:
data[9] |= 0x0c; /* reg 8, 4:1 scale down */
fallthrough;
case 320:
data[9] |= 0x04; /* reg 8, 2:1 scale down */
fallthrough;
case 640:
default:
data[3] = 0x50; /* reg 2, H size/8 */
data[4] = 0x78; /* reg 3, V size/4 */
data[6] = 0x04; /* reg 5, H start */
data[8] = 0x03; /* reg 7, V start */
if (sd->sensor_type == 2) {
data[6] = 2;
data[8] = 1;
}
if (sd->do_lcd_stop)
data[8] = 0x04; /* Bayer tile shifted */
break;
case 176:
data[9] |= 0x04; /* reg 8, 2:1 scale down */
fallthrough;
case 352:
data[3] = 0x2c; /* reg 2, H size */
data[4] = 0x48; /* reg 3, V size */
data[6] = 0x94; /* reg 5, H start */
data[8] = 0x63; /* reg 7, V start */
if (sd->do_lcd_stop)
data[8] = 0x64; /* Bayer tile shifted */
break;
}
err_code = mr_write(gspca_dev, 11);
if (err_code < 0)
return err_code;
if (!sd->sensor_type) {
static const struct sensor_w_data vga_sensor0_init_data[] = {
{0x01, 0x00, {0x0c, 0x00, 0x04}, 3},
{0x14, 0x00, {0x01, 0xe4, 0x02, 0x84}, 4},
{0x20, 0x00, {0x00, 0x80, 0x00, 0x08}, 4},
{0x25, 0x00, {0x03, 0xa9, 0x80}, 3},
{0x30, 0x00, {0x30, 0x18, 0x10, 0x18}, 4},
{0, 0, {0}, 0}
};
err_code = sensor_write_regs(gspca_dev, vga_sensor0_init_data,
ARRAY_SIZE(vga_sensor0_init_data));
} else if (sd->sensor_type == 1) {
static const struct sensor_w_data color_adj[] = {
{0x02, 0x00, {0x06, 0x59, 0x0c, 0x16, 0x00,
/* adjusted blue, green, red gain correct
too much blue from the Sakar Digital */
0x05, 0x01, 0x04}, 8}
};
static const struct sensor_w_data color_no_adj[] = {
{0x02, 0x00, {0x06, 0x59, 0x0c, 0x16, 0x00,
/* default blue, green, red gain settings */
0x07, 0x00, 0x01}, 8}
};
static const struct sensor_w_data vga_sensor1_init_data[] = {
{0x11, 0x04, {0x01}, 1},
{0x0a, 0x00, {0x00, 0x01, 0x00, 0x00, 0x01,
/* These settings may be better for some cameras */
/* {0x0a, 0x00, {0x01, 0x06, 0x00, 0x00, 0x01, */
0x00, 0x0a}, 7},
{0x11, 0x04, {0x01}, 1},
{0x12, 0x00, {0x00, 0x63, 0x00, 0x70, 0x00, 0x00}, 6},
{0x11, 0x04, {0x01}, 1},
{0, 0, {0}, 0}
};
if (sd->adj_colors)
err_code = sensor_write_regs(gspca_dev, color_adj,
ARRAY_SIZE(color_adj));
else
err_code = sensor_write_regs(gspca_dev, color_no_adj,
ARRAY_SIZE(color_no_adj));
if (err_code < 0)
return err_code;
err_code = sensor_write_regs(gspca_dev, vga_sensor1_init_data,
ARRAY_SIZE(vga_sensor1_init_data));
} else { /* sensor type == 2 */
static const struct sensor_w_data vga_sensor2_init_data[] = {
{0x01, 0x00, {0x48}, 1},
{0x02, 0x00, {0x22}, 1},
/* Reg 3 msb and 4 is lsb of the exposure setting*/
{0x05, 0x00, {0x10}, 1},
{0x06, 0x00, {0x00}, 1},
{0x07, 0x00, {0x00}, 1},
{0x08, 0x00, {0x00}, 1},
{0x09, 0x00, {0x00}, 1},
/* The following are used in the gain control
* which is BTW completely borked in the OEM driver
* The values for each color go from 0 to 0x7ff
*{0x0a, 0x00, {0x01}, 1}, green1 gain msb
*{0x0b, 0x00, {0x10}, 1}, green1 gain lsb
*{0x0c, 0x00, {0x01}, 1}, red gain msb
*{0x0d, 0x00, {0x10}, 1}, red gain lsb
*{0x0e, 0x00, {0x01}, 1}, blue gain msb
*{0x0f, 0x00, {0x10}, 1}, blue gain lsb
*{0x10, 0x00, {0x01}, 1}, green2 gain msb
*{0x11, 0x00, {0x10}, 1}, green2 gain lsb
*/
{0x12, 0x00, {0x00}, 1},
{0x13, 0x00, {0x04}, 1}, /* weird effect on colors */
{0x14, 0x00, {0x00}, 1},
{0x15, 0x00, {0x06}, 1},
{0x16, 0x00, {0x01}, 1},
{0x17, 0x00, {0xe2}, 1}, /* vertical alignment */
{0x18, 0x00, {0x02}, 1},
{0x19, 0x00, {0x82}, 1}, /* don't mess with */
{0x1a, 0x00, {0x00}, 1},
{0x1b, 0x00, {0x20}, 1},
/* {0x1c, 0x00, {0x17}, 1}, contrast control */
{0x1d, 0x00, {0x80}, 1}, /* moving causes a mess */
{0x1e, 0x00, {0x08}, 1}, /* moving jams the camera */
{0x1f, 0x00, {0x0c}, 1},
{0x20, 0x00, {0x00}, 1},
{0, 0, {0}, 0}
};
err_code = sensor_write_regs(gspca_dev, vga_sensor2_init_data,
ARRAY_SIZE(vga_sensor2_init_data));
}
return err_code;
}
static int sd_start(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int err_code;
sd->sof_read = 0;
/* Some of the VGA cameras require the memory pointer
* to be set to 0 again. We have been forced to start the
* stream in sd_config() to detect the hardware, and closed it.
* Thus, we need here to do a completely fresh and clean start. */
err_code = zero_the_pointer(gspca_dev);
if (err_code < 0)
return err_code;
err_code = stream_start(gspca_dev);
if (err_code < 0)
return err_code;
if (sd->cam_type == CAM_TYPE_CIF) {
err_code = start_cif_cam(gspca_dev);
} else {
err_code = start_vga_cam(gspca_dev);
}
if (err_code < 0)
return err_code;
return isoc_enable(gspca_dev);
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
stream_stop(gspca_dev);
/* Not all the cams need this, but even if not, probably a good idea */
zero_the_pointer(gspca_dev);
if (sd->do_lcd_stop)
lcd_stop(gspca_dev);
}
static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 sign_reg = 7; /* This reg and the next one used on CIF cams. */
u8 value_reg = 8; /* VGA cams seem to use regs 0x0b and 0x0c */
static const u8 quick_clix_table[] =
/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 */
{ 0, 4, 8, 12, 1, 2, 3, 5, 6, 9, 7, 10, 13, 11, 14, 15};
if (sd->cam_type == CAM_TYPE_VGA) {
sign_reg += 4;
value_reg += 4;
}
/* Note register 7 is also seen as 0x8x or 0xCx in some dumps */
if (val > 0) {
sensor_write1(gspca_dev, sign_reg, 0x00);
} else {
sensor_write1(gspca_dev, sign_reg, 0x01);
val = 257 - val;
}
/* Use lookup table for funky Argus QuickClix brightness */
if (sd->do_lcd_stop)
val = quick_clix_table[val];
sensor_write1(gspca_dev, value_reg, val);
}
static void setexposure(struct gspca_dev *gspca_dev, s32 expo, s32 min_clockdiv)
{
struct sd *sd = (struct sd *) gspca_dev;
int exposure = MR97310A_EXPOSURE_DEFAULT;
u8 buf[2];
if (sd->cam_type == CAM_TYPE_CIF && sd->sensor_type == 1) {
/* This cam does not like exposure settings < 300,
so scale 0 - 4095 to 300 - 4095 */
exposure = (expo * 9267) / 10000 + 300;
sensor_write1(gspca_dev, 3, exposure >> 4);
sensor_write1(gspca_dev, 4, exposure & 0x0f);
} else if (sd->sensor_type == 2) {
exposure = expo;
exposure >>= 3;
sensor_write1(gspca_dev, 3, exposure >> 8);
sensor_write1(gspca_dev, 4, exposure & 0xff);
} else {
/* We have both a clock divider and an exposure register.
We first calculate the clock divider, as that determines
the maximum exposure and then we calculate the exposure
register setting (which goes from 0 - 511).
Note our 0 - 4095 exposure is mapped to 0 - 511
milliseconds exposure time */
u8 clockdiv = (60 * expo + 7999) / 8000;
/* Limit framerate to not exceed usb bandwidth */
if (clockdiv < min_clockdiv && gspca_dev->pixfmt.width >= 320)
clockdiv = min_clockdiv;
else if (clockdiv < 2)
clockdiv = 2;
if (sd->cam_type == CAM_TYPE_VGA && clockdiv < 4)
clockdiv = 4;
/* Frame exposure time in ms = 1000 * clockdiv / 60 ->
exposure = (sd->exposure / 8) * 511 / (1000 * clockdiv / 60) */
exposure = (60 * 511 * expo) / (8000 * clockdiv);
if (exposure > 511)
exposure = 511;
/* exposure register value is reversed! */
exposure = 511 - exposure;
buf[0] = exposure & 0xff;
buf[1] = exposure >> 8;
sensor_write_reg(gspca_dev, 0x0e, 0, buf, 2);
sensor_write1(gspca_dev, 0x02, clockdiv);
}
}
static void setgain(struct gspca_dev *gspca_dev, s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 gainreg;
if (sd->cam_type == CAM_TYPE_CIF && sd->sensor_type == 1)
sensor_write1(gspca_dev, 0x0e, val);
else if (sd->cam_type == CAM_TYPE_VGA && sd->sensor_type == 2)
for (gainreg = 0x0a; gainreg < 0x11; gainreg += 2) {
sensor_write1(gspca_dev, gainreg, val >> 8);
sensor_write1(gspca_dev, gainreg + 1, val & 0xff);
}
else
sensor_write1(gspca_dev, 0x10, val);
}
static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
{
sensor_write1(gspca_dev, 0x1c, val);
}
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 (!gspca_dev->streaming)
return 0;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
setbrightness(gspca_dev, ctrl->val);
break;
case V4L2_CID_CONTRAST:
setcontrast(gspca_dev, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
setexposure(gspca_dev, sd->exposure->val,
sd->min_clockdiv ? sd->min_clockdiv->val : 0);
break;
case V4L2_CID_GAIN:
setgain(gspca_dev, ctrl->val);
break;
}
return gspca_dev->usb_err;
}
static const struct v4l2_ctrl_ops sd_ctrl_ops = {
.s_ctrl = sd_s_ctrl,
};
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;
static const struct v4l2_ctrl_config clockdiv = {
.ops = &sd_ctrl_ops,
.id = MR97310A_CID_CLOCKDIV,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Minimum Clock Divider",
.min = MR97310A_MIN_CLOCKDIV_MIN,
.max = MR97310A_MIN_CLOCKDIV_MAX,
.step = 1,
.def = MR97310A_MIN_CLOCKDIV_DEFAULT,
};
bool has_brightness = false;
bool has_argus_brightness = false;
bool has_contrast = false;
bool has_gain = false;
bool has_cs_gain = false;
bool has_exposure = false;
bool has_clockdiv = false;
gspca_dev->vdev.ctrl_handler = hdl;
v4l2_ctrl_handler_init(hdl, 4);
/* Setup controls depending on camera type */
if (sd->cam_type == CAM_TYPE_CIF) {
/* No brightness for sensor_type 0 */
if (sd->sensor_type == 0)
has_exposure = has_gain = has_clockdiv = true;
else
has_exposure = has_gain = has_brightness = true;
} else {
/* All controls need to be disabled if VGA sensor_type is 0 */
if (sd->sensor_type == 0)
; /* no controls! */
else if (sd->sensor_type == 2)
has_exposure = has_cs_gain = has_contrast = true;
else if (sd->do_lcd_stop)
has_exposure = has_gain = has_argus_brightness =
has_clockdiv = true;
else
has_exposure = has_gain = has_brightness =
has_clockdiv = true;
}
/* Separate brightness control description for Argus QuickClix as it has
* different limits from the other mr97310a cameras, and separate gain
* control for Sakar CyberPix camera. */
/*
* This control is disabled for CIF type 1 and VGA type 0 cameras.
* It does not quite act linearly for the Argus QuickClix camera,
* but it does control brightness. The values are 0 - 15 only, and
* the table above makes them act consecutively.
*/
if (has_brightness)
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_BRIGHTNESS, -254, 255, 1,
MR97310A_BRIGHTNESS_DEFAULT);
else if (has_argus_brightness)
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 15, 1,
MR97310A_BRIGHTNESS_DEFAULT);
if (has_contrast)
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_CONTRAST, MR97310A_CONTRAST_MIN,
MR97310A_CONTRAST_MAX, 1, MR97310A_CONTRAST_DEFAULT);
if (has_gain)
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_GAIN, MR97310A_GAIN_MIN, MR97310A_GAIN_MAX,
1, MR97310A_GAIN_DEFAULT);
else if (has_cs_gain)
v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_GAIN,
MR97310A_CS_GAIN_MIN, MR97310A_CS_GAIN_MAX,
1, MR97310A_CS_GAIN_DEFAULT);
if (has_exposure)
sd->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_EXPOSURE, MR97310A_EXPOSURE_MIN,
MR97310A_EXPOSURE_MAX, 1, MR97310A_EXPOSURE_DEFAULT);
if (has_clockdiv)
sd->min_clockdiv = v4l2_ctrl_new_custom(hdl, &clockdiv, NULL);
if (hdl->error) {
pr_err("Could not initialize controls\n");
return hdl->error;
}
if (has_exposure && has_clockdiv)
v4l2_ctrl_cluster(2, &sd->exposure);
return 0;
}
/* Include pac common sof detection functions */
#include "pac_common.h"
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* isoc packet */
int len) /* iso packet length */
{
struct sd *sd = (struct sd *) gspca_dev;
unsigned char *sof;
sof = pac_find_sof(gspca_dev, &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);
/* Start next frame. */
gspca_frame_add(gspca_dev, FIRST_PACKET,
pac_sof_marker, sizeof pac_sof_marker);
len -= sof - data;
data = sof;
}
gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}
/* 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,
.pkt_scan = sd_pkt_scan,
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(0x08ca, 0x0110)}, /* Trust Spyc@m 100 */
{USB_DEVICE(0x08ca, 0x0111)}, /* Aiptek Pencam VGA+ */
{USB_DEVICE(0x093a, 0x010f)}, /* All other known MR97310A VGA cams */
{USB_DEVICE(0x093a, 0x010e)}, /* All known MR97310A CIF cams */
{}
};
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);