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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Subdriver for Scopium astro-camera (DTCS033, 0547:7303)
*
* Copyright (C) 2014 Robert Butora (robert.butora.fi@gmail.com)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "dtcs033"
#include "gspca.h"
MODULE_AUTHOR("Robert Butora <robert.butora.fi@gmail.com>");
MODULE_DESCRIPTION("Scopium DTCS033 astro-cam USB Camera Driver");
MODULE_LICENSE("GPL");
struct dtcs033_usb_requests {
u8 bRequestType;
u8 bRequest;
u16 wValue;
u16 wIndex;
u16 wLength;
};
/* send a usb request */
static void reg_rw(struct gspca_dev *gspca_dev,
u8 bRequestType, u8 bRequest,
u16 wValue, u16 wIndex, u16 wLength)
{
struct usb_device *udev = gspca_dev->dev;
int ret;
if (gspca_dev->usb_err < 0)
return;
ret = usb_control_msg(udev,
usb_rcvctrlpipe(udev, 0),
bRequest,
bRequestType,
wValue, wIndex,
gspca_dev->usb_buf, wLength, 500);
if (ret < 0) {
gspca_dev->usb_err = ret;
pr_err("usb_control_msg error %d\n", ret);
}
return;
}
/* send several usb in/out requests */
static int reg_reqs(struct gspca_dev *gspca_dev,
const struct dtcs033_usb_requests *preqs, int n_reqs)
{
int i = 0;
const struct dtcs033_usb_requests *preq;
while ((i < n_reqs) && (gspca_dev->usb_err >= 0)) {
preq = &preqs[i];
reg_rw(gspca_dev, preq->bRequestType, preq->bRequest,
preq->wValue, preq->wIndex, preq->wLength);
if (gspca_dev->usb_err < 0) {
gspca_err(gspca_dev, "usb error request no: %d / %d\n",
i, n_reqs);
} else if (preq->bRequestType & USB_DIR_IN) {
gspca_dbg(gspca_dev, D_STREAM,
"USB IN (%d) returned[%d] %3ph %s",
i,
preq->wLength,
gspca_dev->usb_buf,
preq->wLength > 3 ? "...\n" : "\n");
}
i++;
}
return gspca_dev->usb_err;
}
/* -- subdriver interface implementation -- */
#define DT_COLS (640)
static const struct v4l2_pix_format dtcs033_mode[] = {
/* raw Bayer patterned output */
{DT_COLS, 480, V4L2_PIX_FMT_GREY, V4L2_FIELD_NONE,
.bytesperline = DT_COLS,
.sizeimage = DT_COLS*480,
.colorspace = V4L2_COLORSPACE_SRGB,
},
/* this mode will demosaic the Bayer pattern */
{DT_COLS, 480, V4L2_PIX_FMT_SRGGB8, V4L2_FIELD_NONE,
.bytesperline = DT_COLS,
.sizeimage = DT_COLS*480,
.colorspace = V4L2_COLORSPACE_SRGB,
}
};
/* config called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
gspca_dev->cam.cam_mode = dtcs033_mode;
gspca_dev->cam.nmodes = ARRAY_SIZE(dtcs033_mode);
gspca_dev->cam.bulk = 1;
gspca_dev->cam.bulk_nurbs = 1;
gspca_dev->cam.bulk_size = DT_COLS*512;
return 0;
}
/* init called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
return 0;
}
/* start stop the camera */
static int dtcs033_start(struct gspca_dev *gspca_dev);
static void dtcs033_stopN(struct gspca_dev *gspca_dev);
/* intercept camera image data */
static void dtcs033_pkt_scan(struct gspca_dev *gspca_dev,
u8 *data, /* packet data */
int len) /* packet data length */
{
/* drop incomplete frames */
if (len != DT_COLS*512) {
gspca_dev->last_packet_type = DISCARD_PACKET;
/* gspca.c: discard invalidates the whole frame. */
return;
}
/* forward complete frames */
gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
gspca_frame_add(gspca_dev, INTER_PACKET,
data + 16*DT_COLS,
len - 32*DT_COLS); /* skip first & last 16 lines */
gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
return;
}
/* -- controls: exposure and gain -- */
static void dtcs033_setexposure(struct gspca_dev *gspca_dev,
s32 expo, s32 gain)
{
/* gain [dB] encoding */
u16 sGain = (u16)gain;
u16 gainVal = 224+(sGain-14)*(768-224)/(33-14);
u16 wIndex = 0x0100|(0x00FF&gainVal);
u16 wValue = (0xFF00&gainVal)>>8;
/* exposure time [msec] encoding */
u16 sXTime = (u16)expo;
u16 xtimeVal = (524*(150-(sXTime-1)))/150;
const u8 bRequestType =
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
const u8 bRequest = 0x18;
reg_rw(gspca_dev,
bRequestType, bRequest, wValue, wIndex, 0);
if (gspca_dev->usb_err < 0)
gspca_err(gspca_dev, "usb error in setexposure(gain) sequence\n");
reg_rw(gspca_dev,
bRequestType, bRequest, (xtimeVal<<4), 0x6300, 0);
if (gspca_dev->usb_err < 0)
gspca_err(gspca_dev, "usb error in setexposure(time) sequence\n");
}
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev;/* !! must be the first item */
/* exposure & gain controls */
struct {
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *gain;
};
};
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_EXPOSURE:
dtcs033_setexposure(gspca_dev,
ctrl->val, sd->gain->val);
break;
case V4L2_CID_GAIN:
dtcs033_setexposure(gspca_dev,
sd->exposure->val, ctrl->val);
break;
}
return gspca_dev->usb_err;
}
static const struct v4l2_ctrl_ops sd_ctrl_ops = {
.s_ctrl = sd_s_ctrl,
};
static int dtcs033_init_controls(struct gspca_dev *gspca_dev)
{
struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
struct sd *sd = (struct sd *) gspca_dev;
gspca_dev->vdev.ctrl_handler = hdl;
v4l2_ctrl_handler_init(hdl, 2);
/* min max step default */
sd->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_EXPOSURE,
1, 150, 1, 75);/* [msec] */
sd->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_GAIN,
14, 33, 1, 24);/* [dB] */
if (hdl->error) {
gspca_err(gspca_dev, "Could not initialize controls: %d\n",
hdl->error);
return hdl->error;
}
v4l2_ctrl_cluster(2, &sd->exposure);
return 0;
}
/* sub-driver description */
static const struct sd_desc sd_desc = {
.name = MODULE_NAME,
.config = sd_config,
.init = sd_init,
.start = dtcs033_start,
.stopN = dtcs033_stopN,
.pkt_scan = dtcs033_pkt_scan,
.init_controls = dtcs033_init_controls,
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(0x0547, 0x7303)},
{}
};
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);
/* ---------------------------------------------------------
USB requests to start/stop the camera [USB 2.0 spec Ch.9].
bRequestType :
0x40 = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0xC0 = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
*/
static const struct dtcs033_usb_requests dtcs033_start_reqs[] = {
/* -- bRequest,wValue,wIndex,wLength */
{ 0x40, 0x01, 0x0001, 0x000F, 0x0000 },
{ 0x40, 0x01, 0x0000, 0x000F, 0x0000 },
{ 0x40, 0x01, 0x0001, 0x000F, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x7F00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1001, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0004, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x7F01, 0x0000 },
{ 0x40, 0x18, 0x30E0, 0x0009, 0x0000 },
{ 0x40, 0x18, 0x0500, 0x012C, 0x0000 },
{ 0x40, 0x18, 0x0380, 0x0200, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x035C, 0x0000 },
{ 0x40, 0x18, 0x05C0, 0x0438, 0x0000 },
{ 0x40, 0x18, 0x0440, 0x0500, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0668, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0700, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0800, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0900, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0A00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0B00, 0x0000 },
{ 0x40, 0x18, 0x30E0, 0x6009, 0x0000 },
{ 0x40, 0x18, 0x0500, 0x612C, 0x0000 },
{ 0x40, 0x18, 0x2090, 0x6274, 0x0000 },
{ 0x40, 0x18, 0x05C0, 0x6338, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6400, 0x0000 },
{ 0x40, 0x18, 0x05C0, 0x6538, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6600, 0x0000 },
{ 0x40, 0x18, 0x0680, 0x6744, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6800, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6900, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6A00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6B00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6C00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6D00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6E00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x808C, 0x0000 },
{ 0x40, 0x18, 0x0010, 0x8101, 0x0000 },
{ 0x40, 0x18, 0x30E0, 0x8200, 0x0000 },
{ 0x40, 0x18, 0x0810, 0x832C, 0x0000 },
{ 0x40, 0x18, 0x0680, 0x842B, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x8500, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x8600, 0x0000 },
{ 0x40, 0x18, 0x0280, 0x8715, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x880C, 0x0000 },
{ 0x40, 0x18, 0x0010, 0x8901, 0x0000 },
{ 0x40, 0x18, 0x30E0, 0x8A00, 0x0000 },
{ 0x40, 0x18, 0x0810, 0x8B2C, 0x0000 },
{ 0x40, 0x18, 0x0680, 0x8C2B, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x8D00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x8E00, 0x0000 },
{ 0x40, 0x18, 0x0280, 0x8F15, 0x0000 },
{ 0x40, 0x18, 0x0010, 0xD040, 0x0000 },
{ 0x40, 0x18, 0x0000, 0xD100, 0x0000 },
{ 0x40, 0x18, 0x00B0, 0xD20A, 0x0000 },
{ 0x40, 0x18, 0x0000, 0xD300, 0x0000 },
{ 0x40, 0x18, 0x30E2, 0xD40D, 0x0000 },
{ 0x40, 0x18, 0x0001, 0xD5C0, 0x0000 },
{ 0x40, 0x18, 0x00A0, 0xD60A, 0x0000 },
{ 0x40, 0x18, 0x0000, 0xD700, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x7F00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1501, 0x0000 },
{ 0x40, 0x18, 0x0001, 0x01FF, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0200, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0304, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1101, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1201, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1300, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1400, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1601, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1800, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1900, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1A00, 0x0000 },
{ 0x40, 0x18, 0x2000, 0x1B00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1C00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x2100, 0x0000 },
{ 0x40, 0x18, 0x00C0, 0x228E, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x3001, 0x0000 },
{ 0x40, 0x18, 0x0010, 0x3101, 0x0000 },
{ 0x40, 0x18, 0x0008, 0x3301, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x3400, 0x0000 },
{ 0x40, 0x18, 0x0012, 0x3549, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x3620, 0x0000 },
{ 0x40, 0x18, 0x0001, 0x3700, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x4000, 0x0000 },
{ 0x40, 0x18, 0xFFFF, 0x41FF, 0x0000 },
{ 0x40, 0x18, 0xFFFF, 0x42FF, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x500F, 0x0000 },
{ 0x40, 0x18, 0x2272, 0x5108, 0x0000 },
{ 0x40, 0x18, 0x2272, 0x5208, 0x0000 },
{ 0x40, 0x18, 0xFFFF, 0x53FF, 0x0000 },
{ 0x40, 0x18, 0xFFFF, 0x54FF, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6000, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6102, 0x0000 },
{ 0x40, 0x18, 0x0010, 0x6214, 0x0000 },
{ 0x40, 0x18, 0x0C80, 0x6300, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6401, 0x0000 },
{ 0x40, 0x18, 0x0680, 0x6551, 0x0000 },
{ 0x40, 0x18, 0xFFFF, 0x66FF, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6702, 0x0000 },
{ 0x40, 0x18, 0x0010, 0x6800, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6900, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6A00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6B00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6C00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6D01, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6E00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x6F00, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x7000, 0x0000 },
{ 0x40, 0x18, 0x0001, 0x7118, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x2001, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1101, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1301, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1300, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1501, 0x0000 },
{ 0xC0, 0x11, 0x0000, 0x24C0, 0x0003 },
{ 0x40, 0x18, 0x0000, 0x3000, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x3620, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x1501, 0x0000 },
{ 0x40, 0x18, 0x0010, 0x6300, 0x0000 },
{ 0x40, 0x18, 0x0002, 0x01F0, 0x0000 },
{ 0x40, 0x01, 0x0003, 0x000F, 0x0000 }
};
static const struct dtcs033_usb_requests dtcs033_stop_reqs[] = {
/* -- bRequest,wValue,wIndex,wLength */
{ 0x40, 0x01, 0x0001, 0x000F, 0x0000 },
{ 0x40, 0x01, 0x0000, 0x000F, 0x0000 },
{ 0x40, 0x18, 0x0000, 0x0003, 0x0000 }
};
static int dtcs033_start(struct gspca_dev *gspca_dev)
{
return reg_reqs(gspca_dev, dtcs033_start_reqs,
ARRAY_SIZE(dtcs033_start_reqs));
}
static void dtcs033_stopN(struct gspca_dev *gspca_dev)
{
reg_reqs(gspca_dev, dtcs033_stop_reqs,
ARRAY_SIZE(dtcs033_stop_reqs));
return;
}
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