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android_kernel_xiaomi_sm8350/drivers/media/video/gspca/ov534.c
Jim Paris 0f7a50b29d V4L/DVB (9873): gspca - ov534: Improve payload handling. 
Frame data in bulk transfers is separated into 2048-byte payloads.
Each payload has its own header.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-12-30 09:39:00 -02:00

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/*
* ov534/ov772x gspca driver
* Copyright (C) 2008 Antonio Ospite <ospite@studenti.unina.it>
* Copyright (C) 2008 Jim Paris <jim@jtan.com>
*
* Based on a prototype written by Mark Ferrell <majortrips@gmail.com>
* USB protocol reverse engineered by Jim Paris <jim@jtan.com>
* https://jim.sh/svn/jim/devl/playstation/ps3/eye/test/
*
* 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
* 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 MODULE_NAME "ov534"
#include "gspca.h"
#define OV534_REG_ADDRESS 0xf1 /* ? */
#define OV534_REG_SUBADDR 0xf2
#define OV534_REG_WRITE 0xf3
#define OV534_REG_READ 0xf4
#define OV534_REG_OPERATION 0xf5
#define OV534_REG_STATUS 0xf6
#define OV534_OP_WRITE_3 0x37
#define OV534_OP_WRITE_2 0x33
#define OV534_OP_READ_2 0xf9
#define CTRL_TIMEOUT 500
MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
MODULE_DESCRIPTION("GSPCA/OV534 USB Camera Driver");
MODULE_LICENSE("GPL");
/* global parameters */
static int frame_rate;
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
__u32 last_fid;
__u32 last_pts;
};
/* V4L2 controls supported by the driver */
static struct ctrl sd_ctrls[] = {
};
static struct v4l2_pix_format vga_mode[] = {
{640, 480, V4L2_PIX_FMT_YUYV, V4L2_FIELD_NONE,
.bytesperline = 640 * 2,
.sizeimage = 640 * 480 * 2,
.colorspace = V4L2_COLORSPACE_JPEG,
.priv = 0},
};
static void ov534_reg_write(struct usb_device *udev, u16 reg, u8 val)
{
u8 data = val;
int ret;
PDEBUG(D_USBO, "reg=0x%04x, val=0%02x", reg, val);
ret = usb_control_msg(udev,
usb_sndctrlpipe(udev, 0),
0x1,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0, reg, &data, 1, CTRL_TIMEOUT);
if (ret < 0)
PDEBUG(D_ERR, "write failed");
}
static u8 ov534_reg_read(struct usb_device *udev, u16 reg)
{
u8 data;
int ret;
ret = usb_control_msg(udev,
usb_rcvctrlpipe(udev, 0),
0x1,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0, reg, &data, 1, CTRL_TIMEOUT);
PDEBUG(D_USBI, "reg=0x%04x, data=0x%02x", reg, data);
if (ret < 0)
PDEBUG(D_ERR, "read failed");
return data;
}
/* Two bits control LED: 0x21 bit 7 and 0x23 bit 7.
* (direction and output)? */
static void ov534_set_led(struct usb_device *udev, int status)
{
u8 data;
PDEBUG(D_CONF, "led status: %d", status);
data = ov534_reg_read(udev, 0x21);
data |= 0x80;
ov534_reg_write(udev, 0x21, data);
data = ov534_reg_read(udev, 0x23);
if (status)
data |= 0x80;
else
data &= ~(0x80);
ov534_reg_write(udev, 0x23, data);
}
static int sccb_check_status(struct usb_device *udev)
{
u8 data;
int i;
for (i = 0; i < 5; i++) {
data = ov534_reg_read(udev, OV534_REG_STATUS);
switch (data) {
case 0x00:
return 1;
case 0x04:
return 0;
case 0x03:
break;
default:
PDEBUG(D_ERR, "sccb status 0x%02x, attempt %d/5\n",
data, i + 1);
}
}
return 0;
}
static void sccb_reg_write(struct usb_device *udev, u16 reg, u8 val)
{
PDEBUG(D_USBO, "reg: 0x%04x, val: 0x%02x", reg, val);
ov534_reg_write(udev, OV534_REG_SUBADDR, reg);
ov534_reg_write(udev, OV534_REG_WRITE, val);
ov534_reg_write(udev, OV534_REG_OPERATION, OV534_OP_WRITE_3);
if (!sccb_check_status(udev))
PDEBUG(D_ERR, "sccb_reg_write failed");
}
static const __u8 ov534_reg_initdata[][2] = {
{ 0xe7, 0x3a },
{ OV534_REG_ADDRESS, 0x42 }, /* select OV772x sensor */
{ 0xc2, 0x0c },
{ 0x88, 0xf8 },
{ 0xc3, 0x69 },
{ 0x89, 0xff },
{ 0x76, 0x03 },
{ 0x92, 0x01 },
{ 0x93, 0x18 },
{ 0x94, 0x10 },
{ 0x95, 0x10 },
{ 0xe2, 0x00 },
{ 0xe7, 0x3e },
{ 0x96, 0x00 },
{ 0x97, 0x20 },
{ 0x97, 0x20 },
{ 0x97, 0x20 },
{ 0x97, 0x0a },
{ 0x97, 0x3f },
{ 0x97, 0x4a },
{ 0x97, 0x20 },
{ 0x97, 0x15 },
{ 0x97, 0x0b },
{ 0x8e, 0x40 },
{ 0x1f, 0x81 },
{ 0x34, 0x05 },
{ 0xe3, 0x04 },
{ 0x88, 0x00 },
{ 0x89, 0x00 },
{ 0x76, 0x00 },
{ 0xe7, 0x2e },
{ 0x31, 0xf9 },
{ 0x25, 0x42 },
{ 0x21, 0xf0 },
{ 0x1c, 0x00 },
{ 0x1d, 0x40 },
{ 0x1d, 0x02 }, /* payload size 0x0200 * 4 = 2048 bytes */
{ 0x1d, 0x00 }, /* payload size */
{ 0x1d, 0x02 }, /* frame size 0x025800 * 4 = 614400 */
{ 0x1d, 0x58 }, /* frame size */
{ 0x1d, 0x00 }, /* frame size */
{ 0x8d, 0x1c },
{ 0x8e, 0x80 },
{ 0xe5, 0x04 },
{ 0xc0, 0x50 },
{ 0xc1, 0x3c },
{ 0xc2, 0x0c },
};
static const __u8 ov772x_reg_initdata[][2] = {
{ 0x12, 0x80 },
{ 0x11, 0x01 },
{ 0x3d, 0x03 },
{ 0x17, 0x26 },
{ 0x18, 0xa0 },
{ 0x19, 0x07 },
{ 0x1a, 0xf0 },
{ 0x32, 0x00 },
{ 0x29, 0xa0 },
{ 0x2c, 0xf0 },
{ 0x65, 0x20 },
{ 0x11, 0x01 },
{ 0x42, 0x7f },
{ 0x63, 0xe0 },
{ 0x64, 0xff },
{ 0x66, 0x00 },
{ 0x13, 0xf0 },
{ 0x0d, 0x41 },
{ 0x0f, 0xc5 },
{ 0x14, 0x11 },
{ 0x22, 0x7f },
{ 0x23, 0x03 },
{ 0x24, 0x40 },
{ 0x25, 0x30 },
{ 0x26, 0xa1 },
{ 0x2a, 0x00 },
{ 0x2b, 0x00 },
{ 0x6b, 0xaa },
{ 0x13, 0xff },
{ 0x90, 0x05 },
{ 0x91, 0x01 },
{ 0x92, 0x03 },
{ 0x93, 0x00 },
{ 0x94, 0x60 },
{ 0x95, 0x3c },
{ 0x96, 0x24 },
{ 0x97, 0x1e },
{ 0x98, 0x62 },
{ 0x99, 0x80 },
{ 0x9a, 0x1e },
{ 0x9b, 0x08 },
{ 0x9c, 0x20 },
{ 0x9e, 0x81 },
{ 0xa6, 0x04 },
{ 0x7e, 0x0c },
{ 0x7f, 0x16 },
{ 0x80, 0x2a },
{ 0x81, 0x4e },
{ 0x82, 0x61 },
{ 0x83, 0x6f },
{ 0x84, 0x7b },
{ 0x85, 0x86 },
{ 0x86, 0x8e },
{ 0x87, 0x97 },
{ 0x88, 0xa4 },
{ 0x89, 0xaf },
{ 0x8a, 0xc5 },
{ 0x8b, 0xd7 },
{ 0x8c, 0xe8 },
{ 0x8d, 0x20 },
{ 0x0c, 0x90 },
{ 0x2b, 0x00 },
{ 0x22, 0x7f },
{ 0x23, 0x03 },
{ 0x11, 0x01 },
{ 0x0c, 0xd0 },
{ 0x64, 0xff },
{ 0x0d, 0x41 },
{ 0x14, 0x41 },
{ 0x0e, 0xcd },
{ 0xac, 0xbf },
{ 0x8e, 0x00 },
{ 0x0c, 0xd0 }
};
/* setup method */
static void ov534_setup(struct usb_device *udev)
{
int i;
/* Initialize bridge chip */
for (i = 0; i < ARRAY_SIZE(ov534_reg_initdata); i++)
ov534_reg_write(udev, ov534_reg_initdata[i][0],
ov534_reg_initdata[i][1]);
ov534_set_led(udev, 1);
/* Initialize sensor */
for (i = 0; i < ARRAY_SIZE(ov772x_reg_initdata); i++)
sccb_reg_write(udev, ov772x_reg_initdata[i][0],
ov772x_reg_initdata[i][1]);
ov534_reg_write(udev, 0xe0, 0x09);
ov534_set_led(udev, 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;
cam = &gspca_dev->cam;
cam->epaddr = 0x01;
cam->cam_mode = vga_mode;
cam->nmodes = ARRAY_SIZE(vga_mode);
cam->bulk_size = 16384;
cam->bulk_nurbs = 2;
return 0;
}
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
int fr;
ov534_setup(gspca_dev->dev);
fr = frame_rate;
switch (fr) {
case 50:
sccb_reg_write(gspca_dev->dev, 0x11, 0x01);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
break;
case 40:
sccb_reg_write(gspca_dev->dev, 0x11, 0x02);
sccb_reg_write(gspca_dev->dev, 0x0d, 0xc1);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
break;
/* case 30: */
default:
fr = 30;
sccb_reg_write(gspca_dev->dev, 0x11, 0x04);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x81);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
break;
case 15:
sccb_reg_write(gspca_dev->dev, 0x11, 0x03);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
break;
}
PDEBUG(D_PROBE, "frame_rate: %d", fr);
return 0;
}
static int sd_start(struct gspca_dev *gspca_dev)
{
/* start streaming data */
ov534_set_led(gspca_dev->dev, 1);
ov534_reg_write(gspca_dev->dev, 0xe0, 0x00);
return 0;
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
/* stop streaming data */
ov534_reg_write(gspca_dev->dev, 0xe0, 0x09);
ov534_set_led(gspca_dev->dev, 0);
}
/* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */
#define UVC_STREAM_EOH (1 << 7)
#define UVC_STREAM_ERR (1 << 6)
#define UVC_STREAM_STI (1 << 5)
#define UVC_STREAM_RES (1 << 4)
#define UVC_STREAM_SCR (1 << 3)
#define UVC_STREAM_PTS (1 << 2)
#define UVC_STREAM_EOF (1 << 1)
#define UVC_STREAM_FID (1 << 0)
static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame,
__u8 *data, int len)
{
struct sd *sd = (struct sd *) gspca_dev;
__u32 this_pts;
int this_fid;
int remaining_len = len;
__u8 *next_data = data;
scan_next:
if (remaining_len <= 0)
return;
data = next_data;
len = min(remaining_len, 2048);
remaining_len -= len;
next_data += len;
/* Payloads are prefixed with a the UVC-style header. We
consider a frame to start when the FID toggles, or the PTS
changes. A frame ends when EOF is set, and we've received
the correct number of bytes. */
/* Verify UVC header. Header length is always 12 */
if (data[0] != 12 || len < 12) {
PDEBUG(D_PACK, "bad header");
goto discard;
}
/* Check errors */
if (data[1] & UVC_STREAM_ERR) {
PDEBUG(D_PACK, "payload error");
goto discard;
}
/* Extract PTS and FID */
if (!(data[1] & UVC_STREAM_PTS)) {
PDEBUG(D_PACK, "PTS not present");
goto discard;
}
this_pts = (data[5] << 24) | (data[4] << 16) | (data[3] << 8) | data[2];
this_fid = (data[1] & UVC_STREAM_FID) ? 1 : 0;
/* If PTS or FID has changed, start a new frame. */
if (this_pts != sd->last_pts || this_fid != sd->last_fid) {
gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL, 0);
sd->last_pts = this_pts;
sd->last_fid = this_fid;
}
/* Add the data from this payload */
gspca_frame_add(gspca_dev, INTER_PACKET, frame,
data + 12, len - 12);
/* If this packet is marked as EOF, end the frame */
if (data[1] & UVC_STREAM_EOF) {
sd->last_pts = 0;
if ((frame->data_end - frame->data) !=
(gspca_dev->width * gspca_dev->height * 2)) {
PDEBUG(D_PACK, "short frame");
goto discard;
}
gspca_frame_add(gspca_dev, LAST_PACKET, frame, NULL, 0);
}
/* Done this payload */
goto scan_next;
discard:
/* Discard data until a new frame starts. */
gspca_frame_add(gspca_dev, DISCARD_PACKET, frame, NULL, 0);
goto scan_next;
}
/* sub-driver description */
static const struct sd_desc sd_desc = {
.name = MODULE_NAME,
.ctrls = sd_ctrls,
.nctrls = ARRAY_SIZE(sd_ctrls),
.config = sd_config,
.init = sd_init,
.start = sd_start,
.stopN = sd_stopN,
.pkt_scan = sd_pkt_scan,
};
/* -- module initialisation -- */
static const __devinitdata struct usb_device_id device_table[] = {
{USB_DEVICE(0x06f8, 0x3002)}, /* Hercules Blog Webcam */
{USB_DEVICE(0x06f8, 0x3003)}, /* Hercules Dualpix HD Weblog */
{USB_DEVICE(0x1415, 0x2000)}, /* Sony HD Eye for PS3 (SLEH 00201) */
{}
};
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,
#endif
};
/* -- module insert / remove -- */
static int __init sd_mod_init(void)
{
if (usb_register(&sd_driver) < 0)
return -1;
PDEBUG(D_PROBE, "registered");
return 0;
}
static void __exit sd_mod_exit(void)
{
usb_deregister(&sd_driver);
PDEBUG(D_PROBE, "deregistered");
}
module_init(sd_mod_init);
module_exit(sd_mod_exit);
module_param(frame_rate, int, 0644);
MODULE_PARM_DESC(frame_rate, "Frame rate (15, 30, 40, 50)");
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