/* * 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);