--- /dev/null
+/*
+ * Driver for USB webcams based on Konica chipset. This
+ * chipset is used in Intel YC76 camera.
+ *
+ * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Based on the usbvideo v4l1 konicawc driver which is:
+ *
+ * Copyright (C) 2002 Simon Evans <spse@secret.org.uk>
+ *
+ * The code for making gspca work with a webcam with 2 isoc endpoints was
+ * taken from the benq gspca subdriver which is:
+ *
+ * Copyright (C) 2009 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
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define MODULE_NAME "konica"
+
+#include <linux/input.h>
+#include "gspca.h"
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+#define WHITEBAL_REG 0x01
+#define BRIGHTNESS_REG 0x02
+#define SHARPNESS_REG 0x03
+#define CONTRAST_REG 0x04
+#define SATURATION_REG 0x05
+
+/* specific webcam descriptor */
+struct sd {
+ struct gspca_dev gspca_dev; /* !! must be the first item */
+ struct urb *last_data_urb;
+ u8 snapshot_pressed;
+};
+
+
+/* .priv is what goes to register 8 for this mode, known working values:
+ 0x00 -> 176x144, cropped
+ 0x01 -> 176x144, cropped
+ 0x02 -> 176x144, cropped
+ 0x03 -> 176x144, cropped
+ 0x04 -> 176x144, binned
+ 0x05 -> 320x240
+ 0x06 -> 320x240
+ 0x07 -> 160x120, cropped
+ 0x08 -> 160x120, cropped
+ 0x09 -> 160x120, binned (note has 136 lines)
+ 0x0a -> 160x120, binned (note has 136 lines)
+ 0x0b -> 160x120, cropped
+*/
+static const struct v4l2_pix_format vga_mode[] = {
+ {160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
+ .bytesperline = 160,
+ .sizeimage = 160 * 136 * 3 / 2 + 960,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0x0a},
+ {176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
+ .bytesperline = 176,
+ .sizeimage = 176 * 144 * 3 / 2 + 960,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0x04},
+ {320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
+ .bytesperline = 320,
+ .sizeimage = 320 * 240 * 3 / 2 + 960,
+ .colorspace = V4L2_COLORSPACE_SRGB,
+ .priv = 0x05},
+};
+
+static void sd_isoc_irq(struct urb *urb);
+
+static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
+{
+ struct usb_device *dev = gspca_dev->dev;
+ int ret;
+
+ if (gspca_dev->usb_err < 0)
+ return;
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ 0x02,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ value,
+ index,
+ NULL,
+ 0,
+ 1000);
+ if (ret < 0) {
+ pr_err("reg_w err writing %02x to %02x: %d\n",
+ value, index, ret);
+ gspca_dev->usb_err = ret;
+ }
+}
+
+static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
+{
+ struct usb_device *dev = gspca_dev->dev;
+ int ret;
+
+ if (gspca_dev->usb_err < 0)
+ return;
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ 0x03,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ value,
+ index,
+ gspca_dev->usb_buf,
+ 2,
+ 1000);
+ if (ret < 0) {
+ pr_err("reg_r err %d\n", ret);
+ gspca_dev->usb_err = ret;
+ }
+}
+
+static void konica_stream_on(struct gspca_dev *gspca_dev)
+{
+ reg_w(gspca_dev, 1, 0x0b);
+}
+
+static void konica_stream_off(struct gspca_dev *gspca_dev)
+{
+ reg_w(gspca_dev, 0, 0x0b);
+}
+
+/* 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 = vga_mode;
+ gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
+ gspca_dev->cam.no_urb_create = 1;
+
+ return 0;
+}
+
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+ int i;
+
+ /*
+ * The konica needs a freaking large time to "boot" (approx 6.5 sec.),
+ * and does not want to be bothered while doing so :|
+ * Register 0x10 counts from 1 - 3, with 3 being "ready"
+ */
+ msleep(6000);
+ for (i = 0; i < 20; i++) {
+ reg_r(gspca_dev, 0, 0x10);
+ if (gspca_dev->usb_buf[0] == 3)
+ break;
+ msleep(100);
+ }
+ reg_w(gspca_dev, 0, 0x0d);
+
+ return gspca_dev->usb_err;
+}
+
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ struct urb *urb;
+ int i, n, packet_size;
+ struct usb_host_interface *alt;
+ struct usb_interface *intf;
+
+ intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
+ alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
+ if (!alt) {
+ pr_err("Couldn't get altsetting\n");
+ return -EIO;
+ }
+
+ packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
+
+ n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
+ reg_w(gspca_dev, n, 0x08);
+
+ konica_stream_on(gspca_dev);
+
+ if (gspca_dev->usb_err)
+ return gspca_dev->usb_err;
+
+ /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
+#if MAX_NURBS < 4
+#error "Not enough URBs in the gspca table"
+#endif
+#define SD_NPKT 32
+ for (n = 0; n < 4; n++) {
+ i = n & 1 ? 0 : 1;
+ packet_size =
+ le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
+ urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
+ if (!urb) {
+ pr_err("usb_alloc_urb failed\n");
+ return -ENOMEM;
+ }
+ gspca_dev->urb[n] = urb;
+ urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
+ packet_size * SD_NPKT,
+ GFP_KERNEL,
+ &urb->transfer_dma);
+ if (urb->transfer_buffer == NULL) {
+ pr_err("usb_buffer_alloc failed\n");
+ return -ENOMEM;
+ }
+
+ urb->dev = gspca_dev->dev;
+ urb->context = gspca_dev;
+ urb->transfer_buffer_length = packet_size * SD_NPKT;
+ urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
+ n & 1 ? 0x81 : 0x82);
+ urb->transfer_flags = URB_ISO_ASAP
+ | URB_NO_TRANSFER_DMA_MAP;
+ urb->interval = 1;
+ urb->complete = sd_isoc_irq;
+ urb->number_of_packets = SD_NPKT;
+ for (i = 0; i < SD_NPKT; i++) {
+ urb->iso_frame_desc[i].length = packet_size;
+ urb->iso_frame_desc[i].offset = packet_size * i;
+ }
+ }
+
+ return 0;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ konica_stream_off(gspca_dev);
+#if IS_ENABLED(CONFIG_INPUT)
+ /* Don't keep the button in the pressed state "forever" if it was
+ pressed when streaming is stopped */
+ if (sd->snapshot_pressed) {
+ input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
+ input_sync(gspca_dev->input_dev);
+ sd->snapshot_pressed = 0;
+ }
+#endif
+}
+
+/* reception of an URB */
+static void sd_isoc_irq(struct urb *urb)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ struct sd *sd = (struct sd *) gspca_dev;
+ struct urb *data_urb, *status_urb;
+ u8 *data;
+ int i, st;
+
+ PDEBUG(D_PACK, "sd isoc irq");
+ if (!gspca_dev->streaming)
+ return;
+
+ if (urb->status != 0) {
+ if (urb->status == -ESHUTDOWN)
+ return; /* disconnection */
+#ifdef CONFIG_PM
+ if (gspca_dev->frozen)
+ return;
+#endif
+ PERR("urb status: %d", urb->status);
+ st = usb_submit_urb(urb, GFP_ATOMIC);
+ if (st < 0)
+ pr_err("resubmit urb error %d\n", st);
+ return;
+ }
+
+ /* if this is a data URB (ep 0x82), wait */
+ if (urb->transfer_buffer_length > 32) {
+ sd->last_data_urb = urb;
+ return;
+ }
+
+ status_urb = urb;
+ data_urb = sd->last_data_urb;
+ sd->last_data_urb = NULL;
+
+ if (!data_urb || data_urb->start_frame != status_urb->start_frame) {
+ PERR("lost sync on frames");
+ goto resubmit;
+ }
+
+ if (data_urb->number_of_packets != status_urb->number_of_packets) {
+ PERR("no packets does not match, data: %d, status: %d",
+ data_urb->number_of_packets,
+ status_urb->number_of_packets);
+ goto resubmit;
+ }
+
+ for (i = 0; i < status_urb->number_of_packets; i++) {
+ if (data_urb->iso_frame_desc[i].status ||
+ status_urb->iso_frame_desc[i].status) {
+ PERR("pkt %d data-status %d, status-status %d", i,
+ data_urb->iso_frame_desc[i].status,
+ status_urb->iso_frame_desc[i].status);
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+
+ if (status_urb->iso_frame_desc[i].actual_length != 1) {
+ PERR("bad status packet length %d",
+ status_urb->iso_frame_desc[i].actual_length);
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+
+ st = *((u8 *)status_urb->transfer_buffer
+ + status_urb->iso_frame_desc[i].offset);
+
+ data = (u8 *)data_urb->transfer_buffer
+ + data_urb->iso_frame_desc[i].offset;
+
+ /* st: 0x80-0xff: frame start with frame number (ie 0-7f)
+ * otherwise:
+ * bit 0 0: keep packet
+ * 1: drop packet (padding data)
+ *
+ * bit 4 0 button not clicked
+ * 1 button clicked
+ * button is used to `take a picture' (in software)
+ */
+ if (st & 0x80) {
+ gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
+ gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
+ } else {
+#if IS_ENABLED(CONFIG_INPUT)
+ u8 button_state = st & 0x40 ? 1 : 0;
+ if (sd->snapshot_pressed != button_state) {
+ input_report_key(gspca_dev->input_dev,
+ KEY_CAMERA,
+ button_state);
+ input_sync(gspca_dev->input_dev);
+ sd->snapshot_pressed = button_state;
+ }
+#endif
+ if (st & 0x01)
+ continue;
+ }
+ gspca_frame_add(gspca_dev, INTER_PACKET, data,
+ data_urb->iso_frame_desc[i].actual_length);
+ }
+
+resubmit:
+ if (data_urb) {
+ st = usb_submit_urb(data_urb, GFP_ATOMIC);
+ if (st < 0)
+ PERR("usb_submit_urb(data_urb) ret %d", st);
+ }
+ st = usb_submit_urb(status_urb, GFP_ATOMIC);
+ if (st < 0)
+ PERR("usb_submit_urb(status_urb) ret %d\n", st);
+}
+
+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_BRIGHTNESS:
+ konica_stream_off(gspca_dev);
+ reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
+ konica_stream_on(gspca_dev);
+ break;
+ case V4L2_CID_CONTRAST:
+ konica_stream_off(gspca_dev);
+ reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
+ konica_stream_on(gspca_dev);
+ break;
+ case V4L2_CID_SATURATION:
+ konica_stream_off(gspca_dev);
+ reg_w(gspca_dev, ctrl->val, SATURATION_REG);
+ konica_stream_on(gspca_dev);
+ break;
+ case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
+ konica_stream_off(gspca_dev);
+ reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
+ konica_stream_on(gspca_dev);
+ break;
+ case V4L2_CID_SHARPNESS:
+ konica_stream_off(gspca_dev);
+ reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
+ konica_stream_on(gspca_dev);
+ 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 v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
+
+ gspca_dev->vdev.ctrl_handler = hdl;
+ v4l2_ctrl_handler_init(hdl, 5);
+ v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
+ /* Needs to be verified */
+ v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 9, 1, 4);
+ v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_SATURATION, 0, 9, 1, 4);
+ v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_WHITE_BALANCE_TEMPERATURE,
+ 0, 33, 1, 25);
+ v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
+ V4L2_CID_SHARPNESS, 0, 9, 1, 4);
+
+ if (hdl->error) {
+ pr_err("Could not initialize controls\n");
+ return hdl->error;
+ }
+ 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,
+#if IS_ENABLED(CONFIG_INPUT)
+ .other_input = 1,
+#endif
+};
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
+ {}
+};
+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