diff options
Diffstat (limited to 'drivers/media/video/gspca/ov534.c')
| -rw-r--r-- | drivers/media/video/gspca/ov534.c | 601 |
1 files changed, 601 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/ov534.c b/drivers/media/video/gspca/ov534.c new file mode 100644 index 0000000..3bf15e4 --- /dev/null +++ b/drivers/media/video/gspca/ov534.c @@ -0,0 +1,601 @@ +/* + * 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"); + +/* specific webcam descriptor */ +struct sd { + struct gspca_dev gspca_dev; /* !! must be the first item */ + __u32 last_fid; + __u32 last_pts; + int frame_rate; +}; + +/* V4L2 controls supported by the driver */ +static struct ctrl sd_ctrls[] = { +}; + +static const 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 gspca_dev *gspca_dev, u16 reg, u8 val) +{ + struct usb_device *udev = gspca_dev->dev; + int ret; + + PDEBUG(D_USBO, "reg=0x%04x, val=0%02x", reg, val); + gspca_dev->usb_buf[0] = val; + ret = usb_control_msg(udev, + usb_sndctrlpipe(udev, 0), + 0x1, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x0, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT); + if (ret < 0) + PDEBUG(D_ERR, "write failed"); +} + +static u8 ov534_reg_read(struct gspca_dev *gspca_dev, u16 reg) +{ + struct usb_device *udev = gspca_dev->dev; + int ret; + + ret = usb_control_msg(udev, + usb_rcvctrlpipe(udev, 0), + 0x1, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x0, reg, gspca_dev->usb_buf, 1, CTRL_TIMEOUT); + PDEBUG(D_USBI, "reg=0x%04x, data=0x%02x", reg, gspca_dev->usb_buf[0]); + if (ret < 0) + PDEBUG(D_ERR, "read failed"); + return gspca_dev->usb_buf[0]; +} + +/* Two bits control LED: 0x21 bit 7 and 0x23 bit 7. + * (direction and output)? */ +static void ov534_set_led(struct gspca_dev *gspca_dev, int status) +{ + u8 data; + + PDEBUG(D_CONF, "led status: %d", status); + + data = ov534_reg_read(gspca_dev, 0x21); + data |= 0x80; + ov534_reg_write(gspca_dev, 0x21, data); + + data = ov534_reg_read(gspca_dev, 0x23); + if (status) + data |= 0x80; + else + data &= ~(0x80); + + ov534_reg_write(gspca_dev, 0x23, data); +} + +static int sccb_check_status(struct gspca_dev *gspca_dev) +{ + u8 data; + int i; + + for (i = 0; i < 5; i++) { + data = ov534_reg_read(gspca_dev, 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", + data, i + 1); + } + } + return 0; +} + +static void sccb_reg_write(struct gspca_dev *gspca_dev, u16 reg, u8 val) +{ + PDEBUG(D_USBO, "reg: 0x%04x, val: 0x%02x", reg, val); + ov534_reg_write(gspca_dev, OV534_REG_SUBADDR, reg); + ov534_reg_write(gspca_dev, OV534_REG_WRITE, val); + ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_3); + + if (!sccb_check_status(gspca_dev)) + PDEBUG(D_ERR, "sccb_reg_write failed"); +} + +#ifdef GSPCA_DEBUG +static u8 sccb_reg_read(struct gspca_dev *gspca_dev, u16 reg) +{ + ov534_reg_write(gspca_dev, OV534_REG_SUBADDR, reg); + ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_WRITE_2); + if (!sccb_check_status(gspca_dev)) + PDEBUG(D_ERR, "sccb_reg_read failed 1"); + + ov534_reg_write(gspca_dev, OV534_REG_OPERATION, OV534_OP_READ_2); + if (!sccb_check_status(gspca_dev)) + PDEBUG(D_ERR, "sccb_reg_read failed 2"); + + return ov534_reg_read(gspca_dev, OV534_REG_READ); +} +#endif + +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 */ + + { 0x1c, 0x0a }, + { 0x1d, 0x08 }, /* turn on UVC header */ + { 0x1d, 0x0e }, /* .. */ + + { 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 } +}; + +/* set framerate */ +static void ov534_set_frame_rate(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + int fr = sd->frame_rate; + + switch (fr) { + case 50: + sccb_reg_write(gspca_dev, 0x11, 0x01); + sccb_reg_write(gspca_dev, 0x0d, 0x41); + ov534_reg_write(gspca_dev, 0xe5, 0x02); + break; + case 40: + sccb_reg_write(gspca_dev, 0x11, 0x02); + sccb_reg_write(gspca_dev, 0x0d, 0xc1); + ov534_reg_write(gspca_dev, 0xe5, 0x04); + break; +/* case 30: */ + default: + fr = 30; + sccb_reg_write(gspca_dev, 0x11, 0x04); + sccb_reg_write(gspca_dev, 0x0d, 0x81); + ov534_reg_write(gspca_dev, 0xe5, 0x02); + break; + case 15: + sccb_reg_write(gspca_dev, 0x11, 0x03); + sccb_reg_write(gspca_dev, 0x0d, 0x41); + ov534_reg_write(gspca_dev, 0xe5, 0x04); + break; + } + + sd->frame_rate = fr; + PDEBUG(D_PROBE, "frame_rate: %d", fr); +} + +/* setup method */ +static void ov534_setup(struct gspca_dev *gspca_dev) +{ + int i; + + /* Initialize bridge chip */ + for (i = 0; i < ARRAY_SIZE(ov534_reg_initdata); i++) + ov534_reg_write(gspca_dev, ov534_reg_initdata[i][0], + ov534_reg_initdata[i][1]); + + PDEBUG(D_PROBE, "sensor is ov%02x%02x", + sccb_reg_read(gspca_dev, 0x0a), + sccb_reg_read(gspca_dev, 0x0b)); + + ov534_set_led(gspca_dev, 1); + + /* Initialize sensor */ + for (i = 0; i < ARRAY_SIZE(ov772x_reg_initdata); i++) + sccb_reg_write(gspca_dev, ov772x_reg_initdata[i][0], + ov772x_reg_initdata[i][1]); + + ov534_reg_write(gspca_dev, 0xe0, 0x09); + ov534_set_led(gspca_dev, 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) +{ + ov534_setup(gspca_dev); + ov534_set_frame_rate(gspca_dev); + + return 0; +} + +static int sd_start(struct gspca_dev *gspca_dev) +{ + /* start streaming data */ + ov534_set_led(gspca_dev, 1); + ov534_reg_write(gspca_dev, 0xe0, 0x00); + + return 0; +} + +static void sd_stopN(struct gspca_dev *gspca_dev) +{ + /* stop streaming data */ + ov534_reg_write(gspca_dev, 0xe0, 0x09); + ov534_set_led(gspca_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 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; +} + +/* get stream parameters (framerate) */ +static int sd_get_streamparm(struct gspca_dev *gspca_dev, + struct v4l2_streamparm *parm) +{ + struct v4l2_captureparm *cp = &parm->parm.capture; + struct v4l2_fract *tpf = &cp->timeperframe; + struct sd *sd = (struct sd *) gspca_dev; + + if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + cp->capability |= V4L2_CAP_TIMEPERFRAME; + tpf->numerator = 1; + tpf->denominator = sd->frame_rate; + + return 0; +} + +/* set stream parameters (framerate) */ +static int sd_set_streamparm(struct gspca_dev *gspca_dev, + struct v4l2_streamparm *parm) +{ + struct v4l2_captureparm *cp = &parm->parm.capture; + struct v4l2_fract *tpf = &cp->timeperframe; + struct sd *sd = (struct sd *) gspca_dev; + + if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + /* Set requested framerate */ + sd->frame_rate = tpf->denominator / tpf->numerator; + ov534_set_frame_rate(gspca_dev); + + /* Return the actual framerate */ + tpf->numerator = 1; + tpf->denominator = sd->frame_rate; + + return 0; +} + +/* 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, + .get_streamparm = sd_get_streamparm, + .set_streamparm = sd_set_streamparm, +}; + +/* -- 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); |
