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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for USB webcams based on Konica chipset. This4 * chipset is used in Intel YC76 camera.5 *6 * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>7 *8 * Based on the usbvideo v4l1 konicawc driver which is:9 *10 * Copyright (C) 2002 Simon Evans <spse@secret.org.uk>11 *12 * The code for making gspca work with a webcam with 2 isoc endpoints was13 * taken from the benq gspca subdriver which is:14 *15 * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)16 */17 18#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt19 20#define MODULE_NAME "konica"21 22#include <linux/input.h>23#include "gspca.h"24 25MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");26MODULE_DESCRIPTION("Konica chipset USB Camera Driver");27MODULE_LICENSE("GPL");28 29#define WHITEBAL_REG 0x0130#define BRIGHTNESS_REG 0x0231#define SHARPNESS_REG 0x0332#define CONTRAST_REG 0x0433#define SATURATION_REG 0x0534 35/* specific webcam descriptor */36struct sd {37 struct gspca_dev gspca_dev; /* !! must be the first item */38 struct urb *last_data_urb;39 u8 snapshot_pressed;40};41 42 43/* .priv is what goes to register 8 for this mode, known working values:44 0x00 -> 176x144, cropped45 0x01 -> 176x144, cropped46 0x02 -> 176x144, cropped47 0x03 -> 176x144, cropped48 0x04 -> 176x144, binned49 0x05 -> 320x24050 0x06 -> 320x24051 0x07 -> 160x120, cropped52 0x08 -> 160x120, cropped53 0x09 -> 160x120, binned (note has 136 lines)54 0x0a -> 160x120, binned (note has 136 lines)55 0x0b -> 160x120, cropped56*/57static const struct v4l2_pix_format vga_mode[] = {58 {160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,59 .bytesperline = 160,60 .sizeimage = 160 * 136 * 3 / 2 + 960,61 .colorspace = V4L2_COLORSPACE_SRGB,62 .priv = 0x0a},63 {176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,64 .bytesperline = 176,65 .sizeimage = 176 * 144 * 3 / 2 + 960,66 .colorspace = V4L2_COLORSPACE_SRGB,67 .priv = 0x04},68 {320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,69 .bytesperline = 320,70 .sizeimage = 320 * 240 * 3 / 2 + 960,71 .colorspace = V4L2_COLORSPACE_SRGB,72 .priv = 0x05},73};74 75static void sd_isoc_irq(struct urb *urb);76 77static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)78{79 struct usb_device *dev = gspca_dev->dev;80 int ret;81 82 if (gspca_dev->usb_err < 0)83 return;84 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),85 0x02,86 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,87 value,88 index,89 NULL,90 0,91 1000);92 if (ret < 0) {93 pr_err("reg_w err writing %02x to %02x: %d\n",94 value, index, ret);95 gspca_dev->usb_err = ret;96 }97}98 99static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)100{101 struct usb_device *dev = gspca_dev->dev;102 int ret;103 104 if (gspca_dev->usb_err < 0)105 return;106 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),107 0x03,108 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,109 value,110 index,111 gspca_dev->usb_buf,112 2,113 1000);114 if (ret < 0) {115 pr_err("reg_r err %d\n", ret);116 gspca_dev->usb_err = ret;117 /*118 * Make sure the buffer is zeroed to avoid uninitialized119 * values.120 */121 memset(gspca_dev->usb_buf, 0, 2);122 }123}124 125static void konica_stream_on(struct gspca_dev *gspca_dev)126{127 reg_w(gspca_dev, 1, 0x0b);128}129 130static void konica_stream_off(struct gspca_dev *gspca_dev)131{132 reg_w(gspca_dev, 0, 0x0b);133}134 135/* this function is called at probe time */136static int sd_config(struct gspca_dev *gspca_dev,137 const struct usb_device_id *id)138{139 gspca_dev->cam.cam_mode = vga_mode;140 gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);141 gspca_dev->cam.no_urb_create = 1;142 143 return 0;144}145 146/* this function is called at probe and resume time */147static int sd_init(struct gspca_dev *gspca_dev)148{149 int i;150 151 /*152 * The konica needs a freaking large time to "boot" (approx 6.5 sec.),153 * and does not want to be bothered while doing so :|154 * Register 0x10 counts from 1 - 3, with 3 being "ready"155 */156 msleep(6000);157 for (i = 0; i < 20; i++) {158 reg_r(gspca_dev, 0, 0x10);159 if (gspca_dev->usb_buf[0] == 3)160 break;161 msleep(100);162 }163 reg_w(gspca_dev, 0, 0x0d);164 165 return gspca_dev->usb_err;166}167 168static int sd_start(struct gspca_dev *gspca_dev)169{170 struct sd *sd = (struct sd *) gspca_dev;171 struct urb *urb;172 int i, n, packet_size;173 struct usb_host_interface *alt;174 struct usb_interface *intf;175 176 intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);177 alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);178 if (!alt) {179 pr_err("Couldn't get altsetting\n");180 return -EIO;181 }182 183 if (alt->desc.bNumEndpoints < 2)184 return -ENODEV;185 186 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);187 188 n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;189 reg_w(gspca_dev, n, 0x08);190 191 konica_stream_on(gspca_dev);192 193 if (gspca_dev->usb_err)194 return gspca_dev->usb_err;195 196 /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */197#if MAX_NURBS < 4198#error "Not enough URBs in the gspca table"199#endif200#define SD_NPKT 32201 for (n = 0; n < 4; n++) {202 i = n & 1 ? 0 : 1;203 packet_size =204 le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);205 urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);206 if (!urb)207 return -ENOMEM;208 gspca_dev->urb[n] = urb;209 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,210 packet_size * SD_NPKT,211 GFP_KERNEL,212 &urb->transfer_dma);213 if (urb->transfer_buffer == NULL) {214 pr_err("usb_buffer_alloc failed\n");215 return -ENOMEM;216 }217 218 urb->dev = gspca_dev->dev;219 urb->context = gspca_dev;220 urb->transfer_buffer_length = packet_size * SD_NPKT;221 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,222 n & 1 ? 0x81 : 0x82);223 urb->transfer_flags = URB_ISO_ASAP224 | URB_NO_TRANSFER_DMA_MAP;225 urb->interval = 1;226 urb->complete = sd_isoc_irq;227 urb->number_of_packets = SD_NPKT;228 for (i = 0; i < SD_NPKT; i++) {229 urb->iso_frame_desc[i].length = packet_size;230 urb->iso_frame_desc[i].offset = packet_size * i;231 }232 }233 234 return 0;235}236 237static void sd_stopN(struct gspca_dev *gspca_dev)238{239 struct sd *sd __maybe_unused = (struct sd *) gspca_dev;240 241 konica_stream_off(gspca_dev);242#if IS_ENABLED(CONFIG_INPUT)243 /* Don't keep the button in the pressed state "forever" if it was244 pressed when streaming is stopped */245 if (sd->snapshot_pressed) {246 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);247 input_sync(gspca_dev->input_dev);248 sd->snapshot_pressed = 0;249 }250#endif251}252 253/* reception of an URB */254static void sd_isoc_irq(struct urb *urb)255{256 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;257 struct sd *sd = (struct sd *) gspca_dev;258 struct urb *data_urb, *status_urb;259 u8 *data;260 int i, st;261 262 gspca_dbg(gspca_dev, D_PACK, "sd isoc irq\n");263 if (!gspca_dev->streaming)264 return;265 266 if (urb->status != 0) {267 if (urb->status == -ESHUTDOWN)268 return; /* disconnection */269#ifdef CONFIG_PM270 if (gspca_dev->frozen)271 return;272#endif273 gspca_err(gspca_dev, "urb status: %d\n", urb->status);274 st = usb_submit_urb(urb, GFP_ATOMIC);275 if (st < 0)276 pr_err("resubmit urb error %d\n", st);277 return;278 }279 280 /* if this is a data URB (ep 0x82), wait */281 if (urb->transfer_buffer_length > 32) {282 sd->last_data_urb = urb;283 return;284 }285 286 status_urb = urb;287 data_urb = sd->last_data_urb;288 sd->last_data_urb = NULL;289 290 if (!data_urb || data_urb->start_frame != status_urb->start_frame) {291 gspca_err(gspca_dev, "lost sync on frames\n");292 goto resubmit;293 }294 295 if (data_urb->number_of_packets != status_urb->number_of_packets) {296 gspca_err(gspca_dev, "no packets does not match, data: %d, status: %d\n",297 data_urb->number_of_packets,298 status_urb->number_of_packets);299 goto resubmit;300 }301 302 for (i = 0; i < status_urb->number_of_packets; i++) {303 if (data_urb->iso_frame_desc[i].status ||304 status_urb->iso_frame_desc[i].status) {305 gspca_err(gspca_dev, "pkt %d data-status %d, status-status %d\n",306 i,307 data_urb->iso_frame_desc[i].status,308 status_urb->iso_frame_desc[i].status);309 gspca_dev->last_packet_type = DISCARD_PACKET;310 continue;311 }312 313 if (status_urb->iso_frame_desc[i].actual_length != 1) {314 gspca_err(gspca_dev, "bad status packet length %d\n",315 status_urb->iso_frame_desc[i].actual_length);316 gspca_dev->last_packet_type = DISCARD_PACKET;317 continue;318 }319 320 st = *((u8 *)status_urb->transfer_buffer321 + status_urb->iso_frame_desc[i].offset);322 323 data = (u8 *)data_urb->transfer_buffer324 + data_urb->iso_frame_desc[i].offset;325 326 /* st: 0x80-0xff: frame start with frame number (ie 0-7f)327 * otherwise:328 * bit 0 0: keep packet329 * 1: drop packet (padding data)330 *331 * bit 4 0 button not clicked332 * 1 button clicked333 * button is used to `take a picture' (in software)334 */335 if (st & 0x80) {336 gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);337 gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);338 } else {339#if IS_ENABLED(CONFIG_INPUT)340 u8 button_state = st & 0x40 ? 1 : 0;341 if (sd->snapshot_pressed != button_state) {342 input_report_key(gspca_dev->input_dev,343 KEY_CAMERA,344 button_state);345 input_sync(gspca_dev->input_dev);346 sd->snapshot_pressed = button_state;347 }348#endif349 if (st & 0x01)350 continue;351 }352 gspca_frame_add(gspca_dev, INTER_PACKET, data,353 data_urb->iso_frame_desc[i].actual_length);354 }355 356resubmit:357 if (data_urb) {358 st = usb_submit_urb(data_urb, GFP_ATOMIC);359 if (st < 0)360 gspca_err(gspca_dev, "usb_submit_urb(data_urb) ret %d\n",361 st);362 }363 st = usb_submit_urb(status_urb, GFP_ATOMIC);364 if (st < 0)365 gspca_err(gspca_dev, "usb_submit_urb(status_urb) ret %d\n", st);366}367 368static int sd_s_ctrl(struct v4l2_ctrl *ctrl)369{370 struct gspca_dev *gspca_dev =371 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);372 373 gspca_dev->usb_err = 0;374 375 if (!gspca_dev->streaming)376 return 0;377 378 switch (ctrl->id) {379 case V4L2_CID_BRIGHTNESS:380 konica_stream_off(gspca_dev);381 reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);382 konica_stream_on(gspca_dev);383 break;384 case V4L2_CID_CONTRAST:385 konica_stream_off(gspca_dev);386 reg_w(gspca_dev, ctrl->val, CONTRAST_REG);387 konica_stream_on(gspca_dev);388 break;389 case V4L2_CID_SATURATION:390 konica_stream_off(gspca_dev);391 reg_w(gspca_dev, ctrl->val, SATURATION_REG);392 konica_stream_on(gspca_dev);393 break;394 case V4L2_CID_WHITE_BALANCE_TEMPERATURE:395 konica_stream_off(gspca_dev);396 reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);397 konica_stream_on(gspca_dev);398 break;399 case V4L2_CID_SHARPNESS:400 konica_stream_off(gspca_dev);401 reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);402 konica_stream_on(gspca_dev);403 break;404 }405 return gspca_dev->usb_err;406}407 408static const struct v4l2_ctrl_ops sd_ctrl_ops = {409 .s_ctrl = sd_s_ctrl,410};411 412static int sd_init_controls(struct gspca_dev *gspca_dev)413{414 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;415 416 gspca_dev->vdev.ctrl_handler = hdl;417 v4l2_ctrl_handler_init(hdl, 5);418 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,419 V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);420 /* Needs to be verified */421 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,422 V4L2_CID_CONTRAST, 0, 9, 1, 4);423 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,424 V4L2_CID_SATURATION, 0, 9, 1, 4);425 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,426 V4L2_CID_WHITE_BALANCE_TEMPERATURE,427 0, 33, 1, 25);428 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,429 V4L2_CID_SHARPNESS, 0, 9, 1, 4);430 431 if (hdl->error) {432 pr_err("Could not initialize controls\n");433 return hdl->error;434 }435 return 0;436}437 438/* sub-driver description */439static const struct sd_desc sd_desc = {440 .name = MODULE_NAME,441 .config = sd_config,442 .init = sd_init,443 .init_controls = sd_init_controls,444 .start = sd_start,445 .stopN = sd_stopN,446#if IS_ENABLED(CONFIG_INPUT)447 .other_input = 1,448#endif449};450 451/* -- module initialisation -- */452static const struct usb_device_id device_table[] = {453 {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */454 {}455};456MODULE_DEVICE_TABLE(usb, device_table);457 458/* -- device connect -- */459static int sd_probe(struct usb_interface *intf,460 const struct usb_device_id *id)461{462 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),463 THIS_MODULE);464}465 466static struct usb_driver sd_driver = {467 .name = MODULE_NAME,468 .id_table = device_table,469 .probe = sd_probe,470 .disconnect = gspca_disconnect,471#ifdef CONFIG_PM472 .suspend = gspca_suspend,473 .resume = gspca_resume,474 .reset_resume = gspca_resume,475#endif476};477 478module_usb_driver(sd_driver);479