--- /dev/null
+/*
+ * Pixart PAC7311 library
+ * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
+ *
+ * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
+ *
+ * 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
+ */
+
+/* Some documentation about various registers as determined by trial and error.
+ *
+ * Register page 1:
+ *
+ * Address Description
+ * 0x08 Unknown compressor related, must always be 8 except when not
+ * in 640x480 resolution and page 4 reg 2 <= 3 then set it to 9 !
+ * 0x1b Auto white balance related, bit 0 is AWB enable (inverted)
+ * bits 345 seem to toggle per color gains on/off (inverted)
+ * 0x78 Global control, bit 6 controls the LED (inverted)
+ * 0x80 Compression balance, interesting settings:
+ * 0x01 Use this to allow the camera to switch to higher compr.
+ * on the fly. Needed to stay within bandwidth @ 640x480@30
+ * 0x1c From usb captures under Windows for 640x480
+ * 0x2a Values >= this switch the camera to a lower compression,
+ * using the same table for both luminance and chrominance.
+ * This gives a sharper picture. Usable only at 640x480@ <
+ * 15 fps or 320x240 / 160x120. Note currently the driver
+ * does not use this as the quality gain is small and the
+ * generated JPG-s are only understood by v4l-utils >= 0.8.9
+ * 0x3f From usb captures under Windows for 320x240
+ * 0x69 From usb captures under Windows for 160x120
+ *
+ * Register page 4:
+ *
+ * Address Description
+ * 0x02 Clock divider 2-63, fps =~ 60 / val. Must be a multiple of 3 on
+ * the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
+ * 0x0f Master gain 1-245, low value = high gain
+ * 0x10 Another gain 0-15, limited influence (1-2x gain I guess)
+ * 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
+ * Note setting vflip disabled leads to a much lower image quality,
+ * so we always vflip, and tell userspace to flip it back
+ * 0x27 Seems to toggle various gains on / off, Setting bit 7 seems to
+ * completely disable the analog amplification block. Set to 0x68
+ * for max gain, 0x14 for minimal gain.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define MODULE_NAME "pac7311"
+
+#include <linux/input.h>
+#include "gspca.h"
+/* Include pac common sof detection functions */
+#include "pac_common.h"
+
+#define PAC7311_GAIN_DEFAULT 122
+#define PAC7311_EXPOSURE_DEFAULT 3 /* 20 fps, avoid using high compr. */
+
+MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li");
+MODULE_DESCRIPTION("Pixart PAC7311");
+MODULE_LICENSE("GPL");
+
+struct sd {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+
+ struct v4l2_ctrl *contrast;
+ struct v4l2_ctrl *hflip;
+
+ u8 sof_read;
+ u8 autogain_ignore_frames;
+
+ atomic_t avg_lum;
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+ {160, 120, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
+ .bytesperline = 160,
+ .sizeimage = 160 * 120 * 3 / 8 + 590,
+ .colorspace = V4L2_COLORSPACE_JPEG,
+ .priv = 2},
+ {320, 240, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
+ .bytesperline = 320,
+ .sizeimage = 320 * 240 * 3 / 8 + 590,
+ .colorspace = V4L2_COLORSPACE_JPEG,
+ .priv = 1},
+ {640, 480, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,
+ .bytesperline = 640,
+ .sizeimage = 640 * 480 * 3 / 8 + 590,
+ .colorspace = V4L2_COLORSPACE_JPEG,
+ .priv = 0},
+};
+
+#define LOAD_PAGE4 254
+#define END_OF_SEQUENCE 0
+
+static const __u8 init_7311[] = {
+ 0xff, 0x01,
+ 0x78, 0x40, /* Bit_0=start stream, Bit_6=LED */
+ 0x78, 0x40, /* Bit_0=start stream, Bit_6=LED */
+ 0x78, 0x44, /* Bit_0=start stream, Bit_6=LED */
+ 0xff, 0x04,
+ 0x27, 0x80,
+ 0x28, 0xca,
+ 0x29, 0x53,
+ 0x2a, 0x0e,
+ 0xff, 0x01,
+ 0x3e, 0x20,
+};
+
+static const __u8 start_7311[] = {
+/* index, len, [value]* */
+ 0xff, 1, 0x01, /* page 1 */
+ 0x02, 43, 0x48, 0x0a, 0x40, 0x08, 0x00, 0x00, 0x08, 0x00,
+ 0x06, 0xff, 0x11, 0xff, 0x5a, 0x30, 0x90, 0x4c,
+ 0x00, 0x07, 0x00, 0x0a, 0x10, 0x00, 0xa0, 0x10,
+ 0x02, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x01, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00,
+ 0x3e, 42, 0x00, 0x00, 0x78, 0x52, 0x4a, 0x52, 0x78, 0x6e,
+ 0x48, 0x46, 0x48, 0x6e, 0x5f, 0x49, 0x42, 0x49,
+ 0x5f, 0x5f, 0x49, 0x42, 0x49, 0x5f, 0x6e, 0x48,
+ 0x46, 0x48, 0x6e, 0x78, 0x52, 0x4a, 0x52, 0x78,
+ 0x00, 0x00, 0x09, 0x1b, 0x34, 0x49, 0x5c, 0x9b,
+ 0xd0, 0xff,
+ 0x78, 6, 0x44, 0x00, 0xf2, 0x01, 0x01, 0x80,
+ 0x7f, 18, 0x2a, 0x1c, 0x00, 0xc8, 0x02, 0x58, 0x03, 0x84,
+ 0x12, 0x00, 0x1a, 0x04, 0x08, 0x0c, 0x10, 0x14,
+ 0x18, 0x20,
+ 0x96, 3, 0x01, 0x08, 0x04,
+ 0xa0, 4, 0x44, 0x44, 0x44, 0x04,
+ 0xf0, 13, 0x01, 0x00, 0x00, 0x00, 0x22, 0x00, 0x20, 0x00,
+ 0x3f, 0x00, 0x0a, 0x01, 0x00,
+ 0xff, 1, 0x04, /* page 4 */
+ 0, LOAD_PAGE4, /* load the page 4 */
+ 0x11, 1, 0x01,
+ 0, END_OF_SEQUENCE /* end of sequence */
+};
+
+#define SKIP 0xaa
+/* page 4 - the value SKIP says skip the index - see reg_w_page() */
+static const __u8 page4_7311[] = {
+ SKIP, SKIP, 0x04, 0x54, 0x07, 0x2b, 0x09, 0x0f,
+ 0x09, 0x00, SKIP, SKIP, 0x07, 0x00, 0x00, 0x62,
+ 0x08, SKIP, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x03, 0xa0, 0x01, 0xf4, SKIP,
+ SKIP, 0x00, 0x08, SKIP, 0x03, SKIP, 0x00, 0x68,
+ 0xca, 0x10, 0x06, 0x78, 0x00, 0x00, 0x00, 0x00,
+ 0x23, 0x28, 0x04, 0x11, 0x00, 0x00
+};
+
+static void reg_w_buf(struct gspca_dev *gspca_dev,
+ __u8 index,
+ const u8 *buffer, int len)
+{
+ int ret;
+
+ if (gspca_dev->usb_err < 0)
+ return;
+ memcpy(gspca_dev->usb_buf, buffer, len);
+ ret = usb_control_msg(gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0, /* request */
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0, /* value */
+ index, gspca_dev->usb_buf, len,
+ 500);
+ if (ret < 0) {
+ pr_err("reg_w_buf() failed index 0x%02x, error %d\n",
+ index, ret);
+ gspca_dev->usb_err = ret;
+ }
+}
+
+
+static void reg_w(struct gspca_dev *gspca_dev,
+ __u8 index,
+ __u8 value)
+{
+ int ret;
+
+ if (gspca_dev->usb_err < 0)
+ return;
+ gspca_dev->usb_buf[0] = value;
+ ret = usb_control_msg(gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0, /* request */
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0, index, gspca_dev->usb_buf, 1,
+ 500);
+ if (ret < 0) {
+ pr_err("reg_w() failed index 0x%02x, value 0x%02x, error %d\n",
+ index, value, ret);
+ gspca_dev->usb_err = ret;
+ }
+}
+
+static void reg_w_seq(struct gspca_dev *gspca_dev,
+ const __u8 *seq, int len)
+{
+ while (--len >= 0) {
+ reg_w(gspca_dev, seq[0], seq[1]);
+ seq += 2;
+ }
+}
+
+/* load the beginning of a page */
+static void reg_w_page(struct gspca_dev *gspca_dev,
+ const __u8 *page, int len)
+{
+ int index;
+ int ret = 0;
+
+ if (gspca_dev->usb_err < 0)
+ return;
+ for (index = 0; index < len; index++) {
+ if (page[index] == SKIP) /* skip this index */
+ continue;
+ gspca_dev->usb_buf[0] = page[index];
+ ret = usb_control_msg(gspca_dev->dev,
+ usb_sndctrlpipe(gspca_dev->dev, 0),
+ 0, /* request */
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0, index, gspca_dev->usb_buf, 1,
+ 500);
+ if (ret < 0) {
+ pr_err("reg_w_page() failed index 0x%02x, value 0x%02x, error %d\n",
+ index, page[index], ret);
+ gspca_dev->usb_err = ret;
+ break;
+ }
+ }
+}
+
+/* output a variable sequence */
+static void reg_w_var(struct gspca_dev *gspca_dev,
+ const __u8 *seq,
+ const __u8 *page4, unsigned int page4_len)
+{
+ int index, len;
+
+ for (;;) {
+ index = *seq++;
+ len = *seq++;
+ switch (len) {
+ case END_OF_SEQUENCE:
+ return;
+ case LOAD_PAGE4:
+ reg_w_page(gspca_dev, page4, page4_len);
+ break;
+ default:
+ if (len > USB_BUF_SZ) {
+ PERR("Incorrect variable sequence");
+ return;
+ }
+ while (len > 0) {
+ if (len < 8) {
+ reg_w_buf(gspca_dev,
+ index, seq, len);
+ seq += len;
+ break;
+ }
+ reg_w_buf(gspca_dev, index, seq, 8);
+ seq += 8;
+ index += 8;
+ len -= 8;
+ }
+ }
+ }
+ /* not reached */
+}
+
+/* this function is called at probe time for pac7311 */
+static int sd_config(struct gspca_dev *gspca_dev,
+ const struct usb_device_id *id)
+{
+ struct cam *cam = &gspca_dev->cam;
+
+ cam->cam_mode = vga_mode;
+ cam->nmodes = ARRAY_SIZE(vga_mode);
+ cam->input_flags = V4L2_IN_ST_VFLIP;
+
+ return 0;
+}
+
+static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
+{
+ reg_w(gspca_dev, 0xff, 0x04);
+ reg_w(gspca_dev, 0x10, val);
+ /* load registers to sensor (Bit 0, auto clear) */
+ reg_w(gspca_dev, 0x11, 0x01);
+}
+
+static void setgain(struct gspca_dev *gspca_dev, s32 val)
+{
+ reg_w(gspca_dev, 0xff, 0x04); /* page 4 */
+ reg_w(gspca_dev, 0x0e, 0x00);
+ reg_w(gspca_dev, 0x0f, gspca_dev->gain->maximum - val + 1);
+
+ /* load registers to sensor (Bit 0, auto clear) */
+ reg_w(gspca_dev, 0x11, 0x01);
+}
+
+static void setexposure(struct gspca_dev *gspca_dev, s32 val)
+{
+ reg_w(gspca_dev, 0xff, 0x04); /* page 4 */
+ reg_w(gspca_dev, 0x02, val);
+
+ /* load registers to sensor (Bit 0, auto clear) */
+ reg_w(gspca_dev, 0x11, 0x01);
+
+ /*
+ * Page 1 register 8 must always be 0x08 except when not in
+ * 640x480 mode and page 4 reg 2 <= 3 then it must be 9
+ */
+ reg_w(gspca_dev, 0xff, 0x01);
+ if (gspca_dev->pixfmt.width != 640 && val <= 3)
+ reg_w(gspca_dev, 0x08, 0x09);
+ else
+ reg_w(gspca_dev, 0x08, 0x08);
+
+ /*
+ * Page1 register 80 sets the compression balance, normally we
+ * want / use 0x1c, but for 640x480@30fps we must allow the
+ * camera to use higher compression or we may run out of
+ * bandwidth.
+ */
+ if (gspca_dev->pixfmt.width == 640 && val == 2)
+ reg_w(gspca_dev, 0x80, 0x01);
+ else
+ reg_w(gspca_dev, 0x80, 0x1c);
+
+ /* load registers to sensor (Bit 0, auto clear) */
+ reg_w(gspca_dev, 0x11, 0x01);
+}
+
+static void sethvflip(struct gspca_dev *gspca_dev, s32 hflip, s32 vflip)
+{
+ __u8 data;
+
+ reg_w(gspca_dev, 0xff, 0x04); /* page 4 */
+ data = (hflip ? 0x04 : 0x00) |
+ (vflip ? 0x08 : 0x00);
+ reg_w(gspca_dev, 0x21, data);
+
+ /* load registers to sensor (Bit 0, auto clear) */
+ reg_w(gspca_dev, 0x11, 0x01);
+}
+
+/* this function is called at probe and resume time for pac7311 */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+ reg_w_seq(gspca_dev, init_7311, sizeof(init_7311)/2);
+ return gspca_dev->usb_err;
+}
+
+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 (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {
+ /* when switching to autogain set defaults to make sure
+ we are on a valid point of the autogain gain /
+ exposure knee graph, and give this change time to
+ take effect before doing autogain. */
+ gspca_dev->exposure->val = PAC7311_EXPOSURE_DEFAULT;
+ gspca_dev->gain->val = PAC7311_GAIN_DEFAULT;
+ sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
+ }
+
+ if (!gspca_dev->streaming)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_CONTRAST:
+ setcontrast(gspca_dev, ctrl->val);
+ break;
+ case V4L2_CID_AUTOGAIN:
+ if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))
+ setexposure(gspca_dev, gspca_dev->exposure->val);
+ if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))
+ setgain(gspca_dev, gspca_dev->gain->val);
+ break;
+ case V4L2_CID_HFLIP:
+ sethvflip(gspca_dev, sd->hflip->val, 1);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return gspca_dev->usb_err;
+}
+
+static const struct v4l2_ctrl_ops sd_ctrl_ops = {
+ .s_ctrl = sd_s_ctrl,
+};
+
+/* this function is called at probe time */
+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, 5);
+
+ sd->contrast = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 15, 1, 7);
+ gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+ gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_EXPOSURE, 2, 63, 1,
+ PAC7311_EXPOSURE_DEFAULT);
+ gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_GAIN, 0, 244, 1,
+ PAC7311_GAIN_DEFAULT);
+ sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+
+ if (hdl->error) {
+ pr_err("Could not initialize controls\n");
+ return hdl->error;
+ }
+
+ v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);
+ return 0;
+}
+
+/* -- start the camera -- */
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ sd->sof_read = 0;
+
+ reg_w_var(gspca_dev, start_7311,
+ page4_7311, sizeof(page4_7311));
+ setcontrast(gspca_dev, v4l2_ctrl_g_ctrl(sd->contrast));
+ setgain(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->gain));
+ setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure));
+ sethvflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->hflip), 1);
+
+ /* set correct resolution */
+ switch (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
+ case 2: /* 160x120 */
+ reg_w(gspca_dev, 0xff, 0x01);
+ reg_w(gspca_dev, 0x17, 0x20);
+ reg_w(gspca_dev, 0x87, 0x10);
+ break;
+ case 1: /* 320x240 */
+ reg_w(gspca_dev, 0xff, 0x01);
+ reg_w(gspca_dev, 0x17, 0x30);
+ reg_w(gspca_dev, 0x87, 0x11);
+ break;
+ case 0: /* 640x480 */
+ reg_w(gspca_dev, 0xff, 0x01);
+ reg_w(gspca_dev, 0x17, 0x00);
+ reg_w(gspca_dev, 0x87, 0x12);
+ break;
+ }
+
+ sd->sof_read = 0;
+ sd->autogain_ignore_frames = 0;
+ atomic_set(&sd->avg_lum, -1);
+
+ /* start stream */
+ reg_w(gspca_dev, 0xff, 0x01);
+ reg_w(gspca_dev, 0x78, 0x05);
+
+ return gspca_dev->usb_err;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+ reg_w(gspca_dev, 0xff, 0x04);
+ reg_w(gspca_dev, 0x27, 0x80);
+ reg_w(gspca_dev, 0x28, 0xca);
+ reg_w(gspca_dev, 0x29, 0x53);
+ reg_w(gspca_dev, 0x2a, 0x0e);
+ reg_w(gspca_dev, 0xff, 0x01);
+ reg_w(gspca_dev, 0x3e, 0x20);
+ reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */
+ reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */
+ reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */
+}
+
+static void do_autogain(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ int avg_lum = atomic_read(&sd->avg_lum);
+ int desired_lum, deadzone;
+
+ if (avg_lum == -1)
+ return;
+
+ desired_lum = 170;
+ deadzone = 20;
+
+ if (sd->autogain_ignore_frames > 0)
+ sd->autogain_ignore_frames--;
+ else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum,
+ desired_lum, deadzone))
+ sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
+}
+
+/* JPEG header, part 1 */
+static const unsigned char pac_jpeg_header1[] = {
+ 0xff, 0xd8, /* SOI: Start of Image */
+
+ 0xff, 0xc0, /* SOF0: Start of Frame (Baseline DCT) */
+ 0x00, 0x11, /* length = 17 bytes (including this length field) */
+ 0x08 /* Precision: 8 */
+ /* 2 bytes is placed here: number of image lines */
+ /* 2 bytes is placed here: samples per line */
+};
+
+/* JPEG header, continued */
+static const unsigned char pac_jpeg_header2[] = {
+ 0x03, /* Number of image components: 3 */
+ 0x01, 0x21, 0x00, /* ID=1, Subsampling 1x1, Quantization table: 0 */
+ 0x02, 0x11, 0x01, /* ID=2, Subsampling 2x1, Quantization table: 1 */
+ 0x03, 0x11, 0x01, /* ID=3, Subsampling 2x1, Quantization table: 1 */
+
+ 0xff, 0xda, /* SOS: Start Of Scan */
+ 0x00, 0x0c, /* length = 12 bytes (including this length field) */
+ 0x03, /* number of components: 3 */
+ 0x01, 0x00, /* selector 1, table 0x00 */
+ 0x02, 0x11, /* selector 2, table 0x11 */
+ 0x03, 0x11, /* selector 3, table 0x11 */
+ 0x00, 0x3f, /* Spectral selection: 0 .. 63 */
+ 0x00 /* Successive approximation: 0 */
+};
+
+static void pac_start_frame(struct gspca_dev *gspca_dev,
+ __u16 lines, __u16 samples_per_line)
+{
+ unsigned char tmpbuf[4];
+
+ gspca_frame_add(gspca_dev, FIRST_PACKET,
+ pac_jpeg_header1, sizeof(pac_jpeg_header1));
+
+ tmpbuf[0] = lines >> 8;
+ tmpbuf[1] = lines & 0xff;
+ tmpbuf[2] = samples_per_line >> 8;
+ tmpbuf[3] = samples_per_line & 0xff;
+
+ gspca_frame_add(gspca_dev, INTER_PACKET,
+ tmpbuf, sizeof(tmpbuf));
+ gspca_frame_add(gspca_dev, INTER_PACKET,
+ pac_jpeg_header2, sizeof(pac_jpeg_header2));
+}
+
+/* this function is run at interrupt level */
+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;
+ u8 *image;
+ unsigned char *sof;
+
+ sof = pac_find_sof(gspca_dev, &sd->sof_read, data, len);
+ if (sof) {
+ int n, lum_offset, footer_length;
+
+ /*
+ * 6 bytes after the FF D9 EOF marker a number of lumination
+ * bytes are send corresponding to different parts of the
+ * image, the 14th and 15th byte after the EOF seem to
+ * correspond to the center of the image.
+ */
+ lum_offset = 24 + sizeof pac_sof_marker;
+ footer_length = 26;
+
+ /* Finish decoding current frame */
+ n = (sof - data) - (footer_length + sizeof pac_sof_marker);
+ if (n < 0) {
+ gspca_dev->image_len += n;
+ n = 0;
+ } else {
+ gspca_frame_add(gspca_dev, INTER_PACKET, data, n);
+ }
+ image = gspca_dev->image;
+ if (image != NULL
+ && image[gspca_dev->image_len - 2] == 0xff
+ && image[gspca_dev->image_len - 1] == 0xd9)
+ gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
+
+ n = sof - data;
+ len -= n;
+ data = sof;
+
+ /* Get average lumination */
+ if (gspca_dev->last_packet_type == LAST_PACKET &&
+ n >= lum_offset)
+ atomic_set(&sd->avg_lum, data[-lum_offset] +
+ data[-lum_offset + 1]);
+ else
+ atomic_set(&sd->avg_lum, -1);
+
+ /* Start the new frame with the jpeg header */
+ pac_start_frame(gspca_dev,
+ gspca_dev->pixfmt.height, gspca_dev->pixfmt.width);
+ }
+ gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
+}
+
+#if IS_ENABLED(CONFIG_INPUT)
+static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
+ u8 *data, /* interrupt packet data */
+ int len) /* interrupt packet length */
+{
+ int ret = -EINVAL;
+ u8 data0, data1;
+
+ if (len == 2) {
+ data0 = data[0];
+ data1 = data[1];
+ if ((data0 == 0x00 && data1 == 0x11) ||
+ (data0 == 0x22 && data1 == 0x33) ||
+ (data0 == 0x44 && data1 == 0x55) ||
+ (data0 == 0x66 && data1 == 0x77) ||
+ (data0 == 0x88 && data1 == 0x99) ||
+ (data0 == 0xaa && data1 == 0xbb) ||
+ (data0 == 0xcc && data1 == 0xdd) ||
+ (data0 == 0xee && data1 == 0xff)) {
+ input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
+ input_sync(gspca_dev->input_dev);
+ input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
+ input_sync(gspca_dev->input_dev);
+ ret = 0;
+ }
+ }
+
+ return ret;
+}
+#endif
+
+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 = do_autogain,
+#if IS_ENABLED(CONFIG_INPUT)
+ .int_pkt_scan = sd_int_pkt_scan,
+#endif
+};
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x093a, 0x2600)},
+ {USB_DEVICE(0x093a, 0x2601)},
+ {USB_DEVICE(0x093a, 0x2603)},
+ {USB_DEVICE(0x093a, 0x2608)},
+ {USB_DEVICE(0x093a, 0x260e)},
+ {USB_DEVICE(0x093a, 0x260f)},
+ {}
+};
+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);
Code Review / kvmfornfv.git / blobdiff