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Linux/drivers/media/usb/gspca/konica.c

  1 /*
  2  * Driver for USB webcams based on Konica chipset. This
  3  * chipset is used in Intel YC76 camera.
  4  *
  5  * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
  6  *
  7  * Based on the usbvideo v4l1 konicawc driver which is:
  8  *
  9  * Copyright (C) 2002 Simon Evans <spse@secret.org.uk>
 10  *
 11  * The code for making gspca work with a webcam with 2 isoc endpoints was
 12  * taken from the benq gspca subdriver which is:
 13  *
 14  * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
 15  *
 16  * This program is free software; you can redistribute it and/or modify
 17  * it under the terms of the GNU General Public License as published by
 18  * the Free Software Foundation; either version 2 of the License, or
 19  * any later version.
 20  *
 21  * This program is distributed in the hope that it will be useful,
 22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 24  * GNU General Public License for more details.
 25  *
 26  * You should have received a copy of the GNU General Public License
 27  * along with this program; if not, write to the Free Software
 28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 29  */
 30 
 31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 32 
 33 #define MODULE_NAME "konica"
 34 
 35 #include <linux/input.h>
 36 #include "gspca.h"
 37 
 38 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 39 MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
 40 MODULE_LICENSE("GPL");
 41 
 42 #define WHITEBAL_REG   0x01
 43 #define BRIGHTNESS_REG 0x02
 44 #define SHARPNESS_REG  0x03
 45 #define CONTRAST_REG   0x04
 46 #define SATURATION_REG 0x05
 47 
 48 /* specific webcam descriptor */
 49 struct sd {
 50         struct gspca_dev gspca_dev;     /* !! must be the first item */
 51         struct urb *last_data_urb;
 52         u8 snapshot_pressed;
 53 };
 54 
 55 
 56 /* .priv is what goes to register 8 for this mode, known working values:
 57    0x00 -> 176x144, cropped
 58    0x01 -> 176x144, cropped
 59    0x02 -> 176x144, cropped
 60    0x03 -> 176x144, cropped
 61    0x04 -> 176x144, binned
 62    0x05 -> 320x240
 63    0x06 -> 320x240
 64    0x07 -> 160x120, cropped
 65    0x08 -> 160x120, cropped
 66    0x09 -> 160x120, binned (note has 136 lines)
 67    0x0a -> 160x120, binned (note has 136 lines)
 68    0x0b -> 160x120, cropped
 69 */
 70 static const struct v4l2_pix_format vga_mode[] = {
 71         {160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
 72                 .bytesperline = 160,
 73                 .sizeimage = 160 * 136 * 3 / 2 + 960,
 74                 .colorspace = V4L2_COLORSPACE_SRGB,
 75                 .priv = 0x0a},
 76         {176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
 77                 .bytesperline = 176,
 78                 .sizeimage = 176 * 144 * 3 / 2 + 960,
 79                 .colorspace = V4L2_COLORSPACE_SRGB,
 80                 .priv = 0x04},
 81         {320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
 82                 .bytesperline = 320,
 83                 .sizeimage = 320 * 240 * 3 / 2 + 960,
 84                 .colorspace = V4L2_COLORSPACE_SRGB,
 85                 .priv = 0x05},
 86 };
 87 
 88 static void sd_isoc_irq(struct urb *urb);
 89 
 90 static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
 91 {
 92         struct usb_device *dev = gspca_dev->dev;
 93         int ret;
 94 
 95         if (gspca_dev->usb_err < 0)
 96                 return;
 97         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 98                         0x02,
 99                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
100                         value,
101                         index,
102                         NULL,
103                         0,
104                         1000);
105         if (ret < 0) {
106                 pr_err("reg_w err writing %02x to %02x: %d\n",
107                        value, index, ret);
108                 gspca_dev->usb_err = ret;
109         }
110 }
111 
112 static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
113 {
114         struct usb_device *dev = gspca_dev->dev;
115         int ret;
116 
117         if (gspca_dev->usb_err < 0)
118                 return;
119         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
120                         0x03,
121                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
122                         value,
123                         index,
124                         gspca_dev->usb_buf,
125                         2,
126                         1000);
127         if (ret < 0) {
128                 pr_err("reg_r err %d\n", ret);
129                 gspca_dev->usb_err = ret;
130         }
131 }
132 
133 static void konica_stream_on(struct gspca_dev *gspca_dev)
134 {
135         reg_w(gspca_dev, 1, 0x0b);
136 }
137 
138 static void konica_stream_off(struct gspca_dev *gspca_dev)
139 {
140         reg_w(gspca_dev, 0, 0x0b);
141 }
142 
143 /* this function is called at probe time */
144 static int sd_config(struct gspca_dev *gspca_dev,
145                         const struct usb_device_id *id)
146 {
147         gspca_dev->cam.cam_mode = vga_mode;
148         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
149         gspca_dev->cam.no_urb_create = 1;
150 
151         return 0;
152 }
153 
154 /* this function is called at probe and resume time */
155 static int sd_init(struct gspca_dev *gspca_dev)
156 {
157         int i;
158 
159         /*
160          * The konica needs a freaking large time to "boot" (approx 6.5 sec.),
161          * and does not want to be bothered while doing so :|
162          * Register 0x10 counts from 1 - 3, with 3 being "ready"
163          */
164         msleep(6000);
165         for (i = 0; i < 20; i++) {
166                 reg_r(gspca_dev, 0, 0x10);
167                 if (gspca_dev->usb_buf[0] == 3)
168                         break;
169                 msleep(100);
170         }
171         reg_w(gspca_dev, 0, 0x0d);
172 
173         return gspca_dev->usb_err;
174 }
175 
176 static int sd_start(struct gspca_dev *gspca_dev)
177 {
178         struct sd *sd = (struct sd *) gspca_dev;
179         struct urb *urb;
180         int i, n, packet_size;
181         struct usb_host_interface *alt;
182         struct usb_interface *intf;
183 
184         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
185         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
186         if (!alt) {
187                 pr_err("Couldn't get altsetting\n");
188                 return -EIO;
189         }
190 
191         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
192 
193         n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
194         reg_w(gspca_dev, n, 0x08);
195 
196         konica_stream_on(gspca_dev);
197 
198         if (gspca_dev->usb_err)
199                 return gspca_dev->usb_err;
200 
201         /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
202 #if MAX_NURBS < 4
203 #error "Not enough URBs in the gspca table"
204 #endif
205 #define SD_NPKT 32
206         for (n = 0; n < 4; n++) {
207                 i = n & 1 ? 0 : 1;
208                 packet_size =
209                         le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
210                 urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
211                 if (!urb) {
212                         pr_err("usb_alloc_urb failed\n");
213                         return -ENOMEM;
214                 }
215                 gspca_dev->urb[n] = urb;
216                 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
217                                                 packet_size * SD_NPKT,
218                                                 GFP_KERNEL,
219                                                 &urb->transfer_dma);
220                 if (urb->transfer_buffer == NULL) {
221                         pr_err("usb_buffer_alloc failed\n");
222                         return -ENOMEM;
223                 }
224 
225                 urb->dev = gspca_dev->dev;
226                 urb->context = gspca_dev;
227                 urb->transfer_buffer_length = packet_size * SD_NPKT;
228                 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
229                                         n & 1 ? 0x81 : 0x82);
230                 urb->transfer_flags = URB_ISO_ASAP
231                                         | URB_NO_TRANSFER_DMA_MAP;
232                 urb->interval = 1;
233                 urb->complete = sd_isoc_irq;
234                 urb->number_of_packets = SD_NPKT;
235                 for (i = 0; i < SD_NPKT; i++) {
236                         urb->iso_frame_desc[i].length = packet_size;
237                         urb->iso_frame_desc[i].offset = packet_size * i;
238                 }
239         }
240 
241         return 0;
242 }
243 
244 static void sd_stopN(struct gspca_dev *gspca_dev)
245 {
246         struct sd *sd = (struct sd *) gspca_dev;
247 
248         konica_stream_off(gspca_dev);
249 #if IS_ENABLED(CONFIG_INPUT)
250         /* Don't keep the button in the pressed state "forever" if it was
251            pressed when streaming is stopped */
252         if (sd->snapshot_pressed) {
253                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
254                 input_sync(gspca_dev->input_dev);
255                 sd->snapshot_pressed = 0;
256         }
257 #endif
258 }
259 
260 /* reception of an URB */
261 static void sd_isoc_irq(struct urb *urb)
262 {
263         struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
264         struct sd *sd = (struct sd *) gspca_dev;
265         struct urb *data_urb, *status_urb;
266         u8 *data;
267         int i, st;
268 
269         PDEBUG(D_PACK, "sd isoc irq");
270         if (!gspca_dev->streaming)
271                 return;
272 
273         if (urb->status != 0) {
274                 if (urb->status == -ESHUTDOWN)
275                         return;         /* disconnection */
276 #ifdef CONFIG_PM
277                 if (gspca_dev->frozen)
278                         return;
279 #endif
280                 PERR("urb status: %d", urb->status);
281                 st = usb_submit_urb(urb, GFP_ATOMIC);
282                 if (st < 0)
283                         pr_err("resubmit urb error %d\n", st);
284                 return;
285         }
286 
287         /* if this is a data URB (ep 0x82), wait */
288         if (urb->transfer_buffer_length > 32) {
289                 sd->last_data_urb = urb;
290                 return;
291         }
292 
293         status_urb = urb;
294         data_urb   = sd->last_data_urb;
295         sd->last_data_urb = NULL;
296 
297         if (!data_urb || data_urb->start_frame != status_urb->start_frame) {
298                 PERR("lost sync on frames");
299                 goto resubmit;
300         }
301 
302         if (data_urb->number_of_packets != status_urb->number_of_packets) {
303                 PERR("no packets does not match, data: %d, status: %d",
304                      data_urb->number_of_packets,
305                      status_urb->number_of_packets);
306                 goto resubmit;
307         }
308 
309         for (i = 0; i < status_urb->number_of_packets; i++) {
310                 if (data_urb->iso_frame_desc[i].status ||
311                     status_urb->iso_frame_desc[i].status) {
312                         PERR("pkt %d data-status %d, status-status %d", i,
313                              data_urb->iso_frame_desc[i].status,
314                              status_urb->iso_frame_desc[i].status);
315                         gspca_dev->last_packet_type = DISCARD_PACKET;
316                         continue;
317                 }
318 
319                 if (status_urb->iso_frame_desc[i].actual_length != 1) {
320                         PERR("bad status packet length %d",
321                              status_urb->iso_frame_desc[i].actual_length);
322                         gspca_dev->last_packet_type = DISCARD_PACKET;
323                         continue;
324                 }
325 
326                 st = *((u8 *)status_urb->transfer_buffer
327                                 + status_urb->iso_frame_desc[i].offset);
328 
329                 data = (u8 *)data_urb->transfer_buffer
330                                 + data_urb->iso_frame_desc[i].offset;
331 
332                 /* st: 0x80-0xff: frame start with frame number (ie 0-7f)
333                  * otherwise:
334                  * bit 0 0: keep packet
335                  *       1: drop packet (padding data)
336                  *
337                  * bit 4 0 button not clicked
338                  *       1 button clicked
339                  * button is used to `take a picture' (in software)
340                  */
341                 if (st & 0x80) {
342                         gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
343                         gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
344                 } else {
345 #if IS_ENABLED(CONFIG_INPUT)
346                         u8 button_state = st & 0x40 ? 1 : 0;
347                         if (sd->snapshot_pressed != button_state) {
348                                 input_report_key(gspca_dev->input_dev,
349                                                  KEY_CAMERA,
350                                                  button_state);
351                                 input_sync(gspca_dev->input_dev);
352                                 sd->snapshot_pressed = button_state;
353                         }
354 #endif
355                         if (st & 0x01)
356                                 continue;
357                 }
358                 gspca_frame_add(gspca_dev, INTER_PACKET, data,
359                                 data_urb->iso_frame_desc[i].actual_length);
360         }
361 
362 resubmit:
363         if (data_urb) {
364                 st = usb_submit_urb(data_urb, GFP_ATOMIC);
365                 if (st < 0)
366                         PERR("usb_submit_urb(data_urb) ret %d", st);
367         }
368         st = usb_submit_urb(status_urb, GFP_ATOMIC);
369         if (st < 0)
370                 PERR("usb_submit_urb(status_urb) ret %d\n", st);
371 }
372 
373 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
374 {
375         struct gspca_dev *gspca_dev =
376                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
377 
378         gspca_dev->usb_err = 0;
379 
380         if (!gspca_dev->streaming)
381                 return 0;
382 
383         switch (ctrl->id) {
384         case V4L2_CID_BRIGHTNESS:
385                 konica_stream_off(gspca_dev);
386                 reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
387                 konica_stream_on(gspca_dev);
388                 break;
389         case V4L2_CID_CONTRAST:
390                 konica_stream_off(gspca_dev);
391                 reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
392                 konica_stream_on(gspca_dev);
393                 break;
394         case V4L2_CID_SATURATION:
395                 konica_stream_off(gspca_dev);
396                 reg_w(gspca_dev, ctrl->val, SATURATION_REG);
397                 konica_stream_on(gspca_dev);
398                 break;
399         case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
400                 konica_stream_off(gspca_dev);
401                 reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
402                 konica_stream_on(gspca_dev);
403                 break;
404         case V4L2_CID_SHARPNESS:
405                 konica_stream_off(gspca_dev);
406                 reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
407                 konica_stream_on(gspca_dev);
408                 break;
409         }
410         return gspca_dev->usb_err;
411 }
412 
413 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
414         .s_ctrl = sd_s_ctrl,
415 };
416 
417 static int sd_init_controls(struct gspca_dev *gspca_dev)
418 {
419         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
420 
421         gspca_dev->vdev.ctrl_handler = hdl;
422         v4l2_ctrl_handler_init(hdl, 5);
423         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
424                         V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
425         /* Needs to be verified */
426         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
427                         V4L2_CID_CONTRAST, 0, 9, 1, 4);
428         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
429                         V4L2_CID_SATURATION, 0, 9, 1, 4);
430         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
431                         V4L2_CID_WHITE_BALANCE_TEMPERATURE,
432                         0, 33, 1, 25);
433         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
434                         V4L2_CID_SHARPNESS, 0, 9, 1, 4);
435 
436         if (hdl->error) {
437                 pr_err("Could not initialize controls\n");
438                 return hdl->error;
439         }
440         return 0;
441 }
442 
443 /* sub-driver description */
444 static const struct sd_desc sd_desc = {
445         .name = MODULE_NAME,
446         .config = sd_config,
447         .init = sd_init,
448         .init_controls = sd_init_controls,
449         .start = sd_start,
450         .stopN = sd_stopN,
451 #if IS_ENABLED(CONFIG_INPUT)
452         .other_input = 1,
453 #endif
454 };
455 
456 /* -- module initialisation -- */
457 static const struct usb_device_id device_table[] = {
458         {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
459         {}
460 };
461 MODULE_DEVICE_TABLE(usb, device_table);
462 
463 /* -- device connect -- */
464 static int sd_probe(struct usb_interface *intf,
465                         const struct usb_device_id *id)
466 {
467         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
468                                 THIS_MODULE);
469 }
470 
471 static struct usb_driver sd_driver = {
472         .name = MODULE_NAME,
473         .id_table = device_table,
474         .probe = sd_probe,
475         .disconnect = gspca_disconnect,
476 #ifdef CONFIG_PM
477         .suspend = gspca_suspend,
478         .resume = gspca_resume,
479         .reset_resume = gspca_resume,
480 #endif
481 };
482 
483 module_usb_driver(sd_driver);
484 

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