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OpenCloudOS-Kernel/drivers/media/usb/gspca/stk1135.c

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/*
* Syntek STK1135 subdriver
*
* Copyright (c) 2013 Ondrej Zary
*
* Based on Syntekdriver (stk11xx) by Nicolas VIVIEN:
* http://syntekdriver.sourceforge.net
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define MODULE_NAME "stk1135"
#include "gspca.h"
#include "stk1135.h"
MODULE_AUTHOR("Ondrej Zary");
MODULE_DESCRIPTION("Syntek STK1135 USB Camera Driver");
MODULE_LICENSE("GPL");
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
u8 pkt_seq;
u8 sensor_page;
bool flip_status;
u8 flip_debounce;
struct v4l2_ctrl *hflip;
struct v4l2_ctrl *vflip;
};
static const struct v4l2_pix_format stk1135_modes[] = {
/* default mode (this driver supports variable resolution) */
{640, 480, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
.bytesperline = 640,
.sizeimage = 640 * 480,
.colorspace = V4L2_COLORSPACE_SRGB},
};
/* -- read a register -- */
static u8 reg_r(struct gspca_dev *gspca_dev, u16 index)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
if (gspca_dev->usb_err < 0)
return 0;
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
0x00,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x00,
index,
gspca_dev->usb_buf, 1,
500);
gspca_dbg(gspca_dev, D_USBI, "reg_r 0x%x=0x%02x\n",
index, gspca_dev->usb_buf[0]);
if (ret < 0) {
pr_err("reg_r 0x%x err %d\n", index, ret);
gspca_dev->usb_err = ret;
return 0;
}
return gspca_dev->usb_buf[0];
}
/* -- write a register -- */
static void reg_w(struct gspca_dev *gspca_dev, u16 index, u8 val)
{
int ret;
struct usb_device *dev = gspca_dev->dev;
if (gspca_dev->usb_err < 0)
return;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0x01,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
val,
index,
NULL,
0,
500);
gspca_dbg(gspca_dev, D_USBO, "reg_w 0x%x:=0x%02x\n", index, val);
if (ret < 0) {
pr_err("reg_w 0x%x err %d\n", index, ret);
gspca_dev->usb_err = ret;
}
}
static void reg_w_mask(struct gspca_dev *gspca_dev, u16 index, u8 val, u8 mask)
{
val = (reg_r(gspca_dev, index) & ~mask) | (val & mask);
reg_w(gspca_dev, index, val);
}
/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
const struct usb_device_id *id)
{
gspca_dev->cam.cam_mode = stk1135_modes;
gspca_dev->cam.nmodes = ARRAY_SIZE(stk1135_modes);
return 0;
}
static int stk1135_serial_wait_ready(struct gspca_dev *gspca_dev)
{
int i = 0;
u8 val;
do {
val = reg_r(gspca_dev, STK1135_REG_SICTL + 1);
if (i++ > 500) { /* maximum retry count */
pr_err("serial bus timeout: status=0x%02x\n", val);
return -1;
}
/* repeat if BUSY or WRITE/READ not finished */
} while ((val & 0x10) || !(val & 0x05));
return 0;
}
static u8 sensor_read_8(struct gspca_dev *gspca_dev, u8 addr)
{
reg_w(gspca_dev, STK1135_REG_SBUSR, addr);
/* begin read */
reg_w(gspca_dev, STK1135_REG_SICTL, 0x20);
/* wait until finished */
if (stk1135_serial_wait_ready(gspca_dev)) {
pr_err("Sensor read failed\n");
return 0;
}
return reg_r(gspca_dev, STK1135_REG_SBUSR + 1);
}
static u16 sensor_read_16(struct gspca_dev *gspca_dev, u8 addr)
{
return (sensor_read_8(gspca_dev, addr) << 8) |
sensor_read_8(gspca_dev, 0xf1);
}
static void sensor_write_8(struct gspca_dev *gspca_dev, u8 addr, u8 data)
{
/* load address and data registers */
reg_w(gspca_dev, STK1135_REG_SBUSW, addr);
reg_w(gspca_dev, STK1135_REG_SBUSW + 1, data);
/* begin write */
reg_w(gspca_dev, STK1135_REG_SICTL, 0x01);
/* wait until finished */
if (stk1135_serial_wait_ready(gspca_dev)) {
pr_err("Sensor write failed\n");
return;
}
}
static void sensor_write_16(struct gspca_dev *gspca_dev, u8 addr, u16 data)
{
sensor_write_8(gspca_dev, addr, data >> 8);
sensor_write_8(gspca_dev, 0xf1, data & 0xff);
}
static void sensor_set_page(struct gspca_dev *gspca_dev, u8 page)
{
struct sd *sd = (struct sd *) gspca_dev;
if (page != sd->sensor_page) {
sensor_write_16(gspca_dev, 0xf0, page);
sd->sensor_page = page;
}
}
static u16 sensor_read(struct gspca_dev *gspca_dev, u16 reg)
{
sensor_set_page(gspca_dev, reg >> 8);
return sensor_read_16(gspca_dev, reg & 0xff);
}
static void sensor_write(struct gspca_dev *gspca_dev, u16 reg, u16 val)
{
sensor_set_page(gspca_dev, reg >> 8);
sensor_write_16(gspca_dev, reg & 0xff, val);
}
static void sensor_write_mask(struct gspca_dev *gspca_dev,
u16 reg, u16 val, u16 mask)
{
val = (sensor_read(gspca_dev, reg) & ~mask) | (val & mask);
sensor_write(gspca_dev, reg, val);
}
struct sensor_val {
u16 reg;
u16 val;
};
/* configure MT9M112 sensor */
static void stk1135_configure_mt9m112(struct gspca_dev *gspca_dev)
{
static const struct sensor_val cfg[] = {
/* restart&reset, chip enable, reserved */
{ 0x00d, 0x000b }, { 0x00d, 0x0008 }, { 0x035, 0x0022 },
/* mode ctl: AWB on, AE both, clip aper corr, defect corr, AE */
{ 0x106, 0x700e },
{ 0x2dd, 0x18e0 }, /* B-R thresholds, */
/* AWB */
{ 0x21f, 0x0180 }, /* Cb and Cr limits */
{ 0x220, 0xc814 }, { 0x221, 0x8080 }, /* lum limits, RGB gain */
{ 0x222, 0xa078 }, { 0x223, 0xa078 }, /* R, B limit */
{ 0x224, 0x5f20 }, { 0x228, 0xea02 }, /* mtx adj lim, adv ctl */
{ 0x229, 0x867a }, /* wide gates */
/* Color correction */
/* imager gains base, delta, delta signs */
{ 0x25e, 0x594c }, { 0x25f, 0x4d51 }, { 0x260, 0x0002 },
/* AWB adv ctl 2, gain offs */
{ 0x2ef, 0x0008 }, { 0x2f2, 0x0000 },
/* base matrix signs, scale K1-5, K6-9 */
{ 0x202, 0x00ee }, { 0x203, 0x3923 }, { 0x204, 0x0724 },
/* base matrix coef */
{ 0x209, 0x00cd }, { 0x20a, 0x0093 }, { 0x20b, 0x0004 },/*K1-3*/
{ 0x20c, 0x005c }, { 0x20d, 0x00d9 }, { 0x20e, 0x0053 },/*K4-6*/
{ 0x20f, 0x0008 }, { 0x210, 0x0091 }, { 0x211, 0x00cf },/*K7-9*/
{ 0x215, 0x0000 }, /* delta mtx signs */
/* delta matrix coef */
{ 0x216, 0x0000 }, { 0x217, 0x0000 }, { 0x218, 0x0000 },/*D1-3*/
{ 0x219, 0x0000 }, { 0x21a, 0x0000 }, { 0x21b, 0x0000 },/*D4-6*/
{ 0x21c, 0x0000 }, { 0x21d, 0x0000 }, { 0x21e, 0x0000 },/*D7-9*/
/* enable & disable manual WB to apply color corr. settings */
{ 0x106, 0xf00e }, { 0x106, 0x700e },
/* Lens shading correction */
{ 0x180, 0x0007 }, /* control */
/* vertical knee 0, 2+1, 4+3 */
{ 0x181, 0xde13 }, { 0x182, 0xebe2 }, { 0x183, 0x00f6 }, /* R */
{ 0x184, 0xe114 }, { 0x185, 0xeadd }, { 0x186, 0xfdf6 }, /* G */
{ 0x187, 0xe511 }, { 0x188, 0xede6 }, { 0x189, 0xfbf7 }, /* B */
/* horizontal knee 0, 2+1, 4+3, 5 */
{ 0x18a, 0xd613 }, { 0x18b, 0xedec }, /* R .. */
{ 0x18c, 0xf9f2 }, { 0x18d, 0x0000 }, /* .. R */
{ 0x18e, 0xd815 }, { 0x18f, 0xe9ea }, /* G .. */
{ 0x190, 0xf9f1 }, { 0x191, 0x0002 }, /* .. G */
{ 0x192, 0xde10 }, { 0x193, 0xefef }, /* B .. */
{ 0x194, 0xfbf4 }, { 0x195, 0x0002 }, /* .. B */
/* vertical knee 6+5, 8+7 */
{ 0x1b6, 0x0e06 }, { 0x1b7, 0x2713 }, /* R */
{ 0x1b8, 0x1106 }, { 0x1b9, 0x2713 }, /* G */
{ 0x1ba, 0x0c03 }, { 0x1bb, 0x2a0f }, /* B */
/* horizontal knee 7+6, 9+8, 10 */
{ 0x1bc, 0x1208 }, { 0x1bd, 0x1a16 }, { 0x1be, 0x0022 }, /* R */
{ 0x1bf, 0x150a }, { 0x1c0, 0x1c1a }, { 0x1c1, 0x002d }, /* G */
{ 0x1c2, 0x1109 }, { 0x1c3, 0x1414 }, { 0x1c4, 0x002a }, /* B */
{ 0x106, 0x740e }, /* enable lens shading correction */
/* Gamma correction - context A */
{ 0x153, 0x0b03 }, { 0x154, 0x4722 }, { 0x155, 0xac82 },
{ 0x156, 0xdac7 }, { 0x157, 0xf5e9 }, { 0x158, 0xff00 },
/* Gamma correction - context B */
{ 0x1dc, 0x0b03 }, { 0x1dd, 0x4722 }, { 0x1de, 0xac82 },
{ 0x1df, 0xdac7 }, { 0x1e0, 0xf5e9 }, { 0x1e1, 0xff00 },
/* output format: RGB, invert output pixclock, output bayer */
{ 0x13a, 0x4300 }, { 0x19b, 0x4300 }, /* for context A, B */
{ 0x108, 0x0180 }, /* format control - enable bayer row flip */
{ 0x22f, 0xd100 }, { 0x29c, 0xd100 }, /* AE A, B */
/* default prg conf, prg ctl - by 0x2d2, prg advance - PA1 */
{ 0x2d2, 0x0000 }, { 0x2cc, 0x0004 }, { 0x2cb, 0x0001 },
{ 0x22e, 0x0c3c }, { 0x267, 0x1010 }, /* AE tgt ctl, gain lim */
/* PLL */
{ 0x065, 0xa000 }, /* clk ctl - enable PLL (clear bit 14) */
{ 0x066, 0x2003 }, { 0x067, 0x0501 }, /* PLL M=128, N=3, P=1 */
{ 0x065, 0x2000 }, /* disable PLL bypass (clear bit 15) */
{ 0x005, 0x01b8 }, { 0x007, 0x00d8 }, /* horiz blanking B, A */
/* AE line size, shutter delay limit */
{ 0x239, 0x06c0 }, { 0x23b, 0x040e }, /* for context A */
{ 0x23a, 0x06c0 }, { 0x23c, 0x0564 }, /* for context B */
/* shutter width basis 60Hz, 50Hz */
{ 0x257, 0x0208 }, { 0x258, 0x0271 }, /* for context A */
{ 0x259, 0x0209 }, { 0x25a, 0x0271 }, /* for context B */
{ 0x25c, 0x120d }, { 0x25d, 0x1712 }, /* flicker 60Hz, 50Hz */
{ 0x264, 0x5e1c }, /* reserved */
/* flicker, AE gain limits, gain zone limits */
{ 0x25b, 0x0003 }, { 0x236, 0x7810 }, { 0x237, 0x8304 },
{ 0x008, 0x0021 }, /* vert blanking A */
};
int i;
u16 width, height;
for (i = 0; i < ARRAY_SIZE(cfg); i++)
sensor_write(gspca_dev, cfg[i].reg, cfg[i].val);
/* set output size */
width = gspca_dev->pixfmt.width;
height = gspca_dev->pixfmt.height;
if (width <= 640 && height <= 512) { /* context A (half readout speed)*/
sensor_write(gspca_dev, 0x1a7, width);
sensor_write(gspca_dev, 0x1aa, height);
/* set read mode context A */
sensor_write(gspca_dev, 0x0c8, 0x0000);
/* set resize, read mode, vblank, hblank context A */
sensor_write(gspca_dev, 0x2c8, 0x0000);
} else { /* context B (full readout speed) */
sensor_write(gspca_dev, 0x1a1, width);
sensor_write(gspca_dev, 0x1a4, height);
/* set read mode context B */
sensor_write(gspca_dev, 0x0c8, 0x0008);
/* set resize, read mode, vblank, hblank context B */
sensor_write(gspca_dev, 0x2c8, 0x040b);
}
}
static void stk1135_configure_clock(struct gspca_dev *gspca_dev)
{
/* configure SCLKOUT */
reg_w(gspca_dev, STK1135_REG_TMGEN, 0x12);
/* set 1 clock per pixel */
/* and positive edge clocked pulse high when pixel counter = 0 */
reg_w(gspca_dev, STK1135_REG_TCP1 + 0, 0x41);
reg_w(gspca_dev, STK1135_REG_TCP1 + 1, 0x00);
reg_w(gspca_dev, STK1135_REG_TCP1 + 2, 0x00);
reg_w(gspca_dev, STK1135_REG_TCP1 + 3, 0x00);
/* enable CLKOUT for sensor */
reg_w(gspca_dev, STK1135_REG_SENSO + 0, 0x10);
/* disable STOP clock */
reg_w(gspca_dev, STK1135_REG_SENSO + 1, 0x00);
/* set lower 8 bits of PLL feedback divider */
reg_w(gspca_dev, STK1135_REG_SENSO + 3, 0x07);
/* set other PLL parameters */
reg_w(gspca_dev, STK1135_REG_PLLFD, 0x06);
/* enable timing generator */
reg_w(gspca_dev, STK1135_REG_TMGEN, 0x80);
/* enable PLL */
reg_w(gspca_dev, STK1135_REG_SENSO + 2, 0x04);
/* set serial interface clock divider (30MHz/0x1f*16+2) = 60240 kHz) */
reg_w(gspca_dev, STK1135_REG_SICTL + 2, 0x1f);
/* wait a while for sensor to catch up */
udelay(1000);
}
static void stk1135_camera_disable(struct gspca_dev *gspca_dev)
{
/* set capture end Y position to 0 */
reg_w(gspca_dev, STK1135_REG_CIEPO + 2, 0x00);
reg_w(gspca_dev, STK1135_REG_CIEPO + 3, 0x00);
/* disable capture */
reg_w_mask(gspca_dev, STK1135_REG_SCTRL, 0x00, 0x80);
/* enable sensor standby and diasble chip enable */
sensor_write_mask(gspca_dev, 0x00d, 0x0004, 0x000c);
/* disable PLL */
reg_w_mask(gspca_dev, STK1135_REG_SENSO + 2, 0x00, 0x01);
/* disable timing generator */
reg_w(gspca_dev, STK1135_REG_TMGEN, 0x00);
/* enable STOP clock */
reg_w(gspca_dev, STK1135_REG_SENSO + 1, 0x20);
/* disable CLKOUT for sensor */
reg_w(gspca_dev, STK1135_REG_SENSO, 0x00);
/* disable sensor (GPIO5) and enable GPIO0,3,6 (?) - sensor standby? */
reg_w(gspca_dev, STK1135_REG_GCTRL, 0x49);
}
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
u16 sensor_id;
char *sensor_name;
struct sd *sd = (struct sd *) gspca_dev;
/* set GPIO3,4,5,6 direction to output */
reg_w(gspca_dev, STK1135_REG_GCTRL + 2, 0x78);
/* enable sensor (GPIO5) */
reg_w(gspca_dev, STK1135_REG_GCTRL, (1 << 5));
/* disable ROM interface */
reg_w(gspca_dev, STK1135_REG_GCTRL + 3, 0x80);
/* enable interrupts from GPIO8 (flip sensor) and GPIO9 (???) */
reg_w(gspca_dev, STK1135_REG_ICTRL + 1, 0x00);
reg_w(gspca_dev, STK1135_REG_ICTRL + 3, 0x03);
/* enable remote wakeup from GPIO9 (???) */
reg_w(gspca_dev, STK1135_REG_RMCTL + 1, 0x00);
reg_w(gspca_dev, STK1135_REG_RMCTL + 3, 0x02);
/* reset serial interface */
reg_w(gspca_dev, STK1135_REG_SICTL, 0x80);
reg_w(gspca_dev, STK1135_REG_SICTL, 0x00);
/* set sensor address */
reg_w(gspca_dev, STK1135_REG_SICTL + 3, 0xba);
/* disable alt 2-wire serial interface */
reg_w(gspca_dev, STK1135_REG_ASIC + 3, 0x00);
stk1135_configure_clock(gspca_dev);
/* read sensor ID */
sd->sensor_page = 0xff;
sensor_id = sensor_read(gspca_dev, 0x000);
switch (sensor_id) {
case 0x148c:
sensor_name = "MT9M112";
break;
default:
sensor_name = "unknown";
}
pr_info("Detected sensor type %s (0x%x)\n", sensor_name, sensor_id);
stk1135_camera_disable(gspca_dev);
return gspca_dev->usb_err;
}
/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
u16 width, height;
/* enable sensor (GPIO5) */
reg_w(gspca_dev, STK1135_REG_GCTRL, (1 << 5));
stk1135_configure_clock(gspca_dev);
/* set capture start position X = 0, Y = 0 */
reg_w(gspca_dev, STK1135_REG_CISPO + 0, 0x00);
reg_w(gspca_dev, STK1135_REG_CISPO + 1, 0x00);
reg_w(gspca_dev, STK1135_REG_CISPO + 2, 0x00);
reg_w(gspca_dev, STK1135_REG_CISPO + 3, 0x00);
/* set capture end position */
width = gspca_dev->pixfmt.width;
height = gspca_dev->pixfmt.height;
reg_w(gspca_dev, STK1135_REG_CIEPO + 0, width & 0xff);
reg_w(gspca_dev, STK1135_REG_CIEPO + 1, width >> 8);
reg_w(gspca_dev, STK1135_REG_CIEPO + 2, height & 0xff);
reg_w(gspca_dev, STK1135_REG_CIEPO + 3, height >> 8);
/* set 8-bit mode */
reg_w(gspca_dev, STK1135_REG_SCTRL, 0x20);
stk1135_configure_mt9m112(gspca_dev);
/* enable capture */
reg_w_mask(gspca_dev, STK1135_REG_SCTRL, 0x80, 0x80);
if (gspca_dev->usb_err >= 0)
gspca_dbg(gspca_dev, D_STREAM, "camera started alt: 0x%02x\n",
gspca_dev->alt);
sd->pkt_seq = 0;
return gspca_dev->usb_err;
}
static void sd_stopN(struct gspca_dev *gspca_dev)
{
struct usb_device *dev = gspca_dev->dev;
usb_set_interface(dev, gspca_dev->iface, 0);
stk1135_camera_disable(gspca_dev);
gspca_dbg(gspca_dev, D_STREAM, "camera stopped\n");
}
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;
int skip = sizeof(struct stk1135_pkt_header);
bool flip;
enum gspca_packet_type pkt_type = INTER_PACKET;
struct stk1135_pkt_header *hdr = (void *)data;
u8 seq;
if (len < 4) {
gspca_dbg(gspca_dev, D_PACK, "received short packet (less than 4 bytes)\n");
return;
}
/* GPIO 8 is flip sensor (1 = normal position, 0 = flipped to back) */
flip = !(le16_to_cpu(hdr->gpio) & (1 << 8));
/* it's a switch, needs software debounce */
if (sd->flip_status != flip)
sd->flip_debounce++;
else
sd->flip_debounce = 0;
/* check sequence number (not present in new frame packets) */
if (!(hdr->flags & STK1135_HDR_FRAME_START)) {
seq = hdr->seq & STK1135_HDR_SEQ_MASK;
if (seq != sd->pkt_seq) {
gspca_dbg(gspca_dev, D_PACK, "received out-of-sequence packet\n");
/* resync sequence and discard packet */
sd->pkt_seq = seq;
gspca_dev->last_packet_type = DISCARD_PACKET;
return;
}
}
sd->pkt_seq++;
if (sd->pkt_seq > STK1135_HDR_SEQ_MASK)
sd->pkt_seq = 0;
if (len == sizeof(struct stk1135_pkt_header))
return;
if (hdr->flags & STK1135_HDR_FRAME_START) { /* new frame */
skip = 8; /* the header is longer */
gspca_frame_add(gspca_dev, LAST_PACKET, data, 0);
pkt_type = FIRST_PACKET;
}
gspca_frame_add(gspca_dev, pkt_type, data + skip, len - skip);
}
static void sethflip(struct gspca_dev *gspca_dev, s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
if (sd->flip_status)
val = !val;
sensor_write_mask(gspca_dev, 0x020, val ? 0x0002 : 0x0000 , 0x0002);
}
static void setvflip(struct gspca_dev *gspca_dev, s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
if (sd->flip_status)
val = !val;
sensor_write_mask(gspca_dev, 0x020, val ? 0x0001 : 0x0000 , 0x0001);
}
static void stk1135_dq_callback(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
if (sd->flip_debounce > 100) {
sd->flip_status = !sd->flip_status;
sethflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->hflip));
setvflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->vflip));
}
}
static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct gspca_dev *gspca_dev =
container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
gspca_dev->usb_err = 0;
if (!gspca_dev->streaming)
return 0;
switch (ctrl->id) {
case V4L2_CID_HFLIP:
sethflip(gspca_dev, ctrl->val);
break;
case V4L2_CID_VFLIP:
setvflip(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;
gspca_dev->vdev.ctrl_handler = hdl;
v4l2_ctrl_handler_init(hdl, 2);
sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
sd->vflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
if (hdl->error) {
pr_err("Could not initialize controls\n");
return hdl->error;
}
return 0;
}
static void stk1135_try_fmt(struct gspca_dev *gspca_dev, struct v4l2_format *fmt)
{
fmt->fmt.pix.width = clamp(fmt->fmt.pix.width, 32U, 1280U);
fmt->fmt.pix.height = clamp(fmt->fmt.pix.height, 32U, 1024U);
/* round up to even numbers */
fmt->fmt.pix.width += (fmt->fmt.pix.width & 1);
fmt->fmt.pix.height += (fmt->fmt.pix.height & 1);
fmt->fmt.pix.bytesperline = fmt->fmt.pix.width;
fmt->fmt.pix.sizeimage = fmt->fmt.pix.width * fmt->fmt.pix.height;
}
static int stk1135_enum_framesizes(struct gspca_dev *gspca_dev,
struct v4l2_frmsizeenum *fsize)
{
if (fsize->index != 0 || fsize->pixel_format != V4L2_PIX_FMT_SBGGR8)
return -EINVAL;
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise.min_width = 32;
fsize->stepwise.min_height = 32;
fsize->stepwise.max_width = 1280;
fsize->stepwise.max_height = 1024;
fsize->stepwise.step_width = 2;
fsize->stepwise.step_height = 2;
return 0;
}
/* 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,
.dq_callback = stk1135_dq_callback,
.try_fmt = stk1135_try_fmt,
.enum_framesizes = stk1135_enum_framesizes,
};
/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
{USB_DEVICE(0x174f, 0x6a31)}, /* ASUS laptop, MT9M112 sensor */
{}
};
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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