diff options
Diffstat (limited to 'kernel/drivers/media/usb/gspca/stk1135.c')
| -rw-r--r-- | kernel/drivers/media/usb/gspca/stk1135.c | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/kernel/drivers/media/usb/gspca/stk1135.c b/kernel/drivers/media/usb/gspca/stk1135.c new file mode 100644 index 000000000..48234c9a8 --- /dev/null +++ b/kernel/drivers/media/usb/gspca/stk1135.c @@ -0,0 +1,688 @@ +/* + * 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. + * + * 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 "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); + + PDEBUG(D_USBI, "reg_r 0x%x=0x%02x", 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); + PDEBUG(D_USBO, "reg_w 0x%x:=0x%02x", 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) + PDEBUG(D_STREAM, "camera started alt: 0x%02x", + 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); + + PDEBUG(D_STREAM, "camera stopped"); +} + +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) { + PDEBUG(D_PACK, "received short packet (less than 4 bytes)"); + 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) { + PDEBUG(D_PACK, "received out-of-sequence packet"); + /* 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); |