projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branches 'topic/sc18is602' and 'topic/rspi' of git://git.kernel.org/pub/scm...
[linux-block.git] / drivers / media / usb / gspca / stk1135.c
CommitLineData
4ab0620b
OZ		 1/*
2 * Syntek STK1135 subdriver
3 *
4 * Copyright (c) 2013 Ondrej Zary
5 *
6 * Based on Syntekdriver (stk11xx) by Nicolas VIVIEN:
7 * http://syntekdriver.sourceforge.net
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26#define MODULE_NAME "stk1135"
27
28#include "gspca.h"
29#include "stk1135.h"
30
31MODULE_AUTHOR("Ondrej Zary");
32MODULE_DESCRIPTION("Syntek STK1135 USB Camera Driver");
33MODULE_LICENSE("GPL");
34
35
36/* specific webcam descriptor */
37struct sd {
38 struct gspca_dev gspca_dev; /* !! must be the first item */
39
40 u8 pkt_seq;
41 u8 sensor_page;
42
43 bool flip_status;
44 u8 flip_debounce;
45
46 struct v4l2_ctrl *hflip;
47 struct v4l2_ctrl *vflip;
48};
49
50static const struct v4l2_pix_format stk1135_modes[] = {
76e05987 51 /* default mode (this driver supports variable resolution) */
4ab0620b
OZ		 52 {640, 480, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
53 .bytesperline = 640,
54 .sizeimage = 640 * 480,
55 .colorspace = V4L2_COLORSPACE_SRGB},
4ab0620b
OZ		 56};
57
58/* -- read a register -- */
59static u8 reg_r(struct gspca_dev *gspca_dev, u16 index)
60{
61 struct usb_device *dev = gspca_dev->dev;
62 int ret;
63
64 if (gspca_dev->usb_err < 0)
65 return 0;
66 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
67 0x00,
68 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
69 0x00,
70 index,
71 gspca_dev->usb_buf, 1,
72 500);
73
74 PDEBUG(D_USBI, "reg_r 0x%x=0x%02x", index, gspca_dev->usb_buf[0]);
75 if (ret < 0) {
76 pr_err("reg_r 0x%x err %d\n", index, ret);
77 gspca_dev->usb_err = ret;
78 return 0;
79 }
80
81 return gspca_dev->usb_buf[0];
82}
83
84/* -- write a register -- */
85static void reg_w(struct gspca_dev *gspca_dev, u16 index, u8 val)
86{
87 int ret;
88 struct usb_device *dev = gspca_dev->dev;
89
90 if (gspca_dev->usb_err < 0)
91 return;
92 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
93 0x01,
94 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
95 val,
96 index,
97 NULL,
98 0,
99 500);
100 PDEBUG(D_USBO, "reg_w 0x%x:=0x%02x", index, val);
101 if (ret < 0) {
102 pr_err("reg_w 0x%x err %d\n", index, ret);
103 gspca_dev->usb_err = ret;
104 }
105}
106
107static void reg_w_mask(struct gspca_dev *gspca_dev, u16 index, u8 val, u8 mask)
108{
109 val = (reg_r(gspca_dev, index) & ~mask) | (val & mask);
110 reg_w(gspca_dev, index, val);
111}
112
113/* this function is called at probe time */
114static int sd_config(struct gspca_dev *gspca_dev,
115 const struct usb_device_id *id)
116{
117 gspca_dev->cam.cam_mode = stk1135_modes;
118 gspca_dev->cam.nmodes = ARRAY_SIZE(stk1135_modes);
119 return 0;
120}
121
122static int stk1135_serial_wait_ready(struct gspca_dev *gspca_dev)
123{
124 int i = 0;
125 u8 val;
126
127 do {
128 val = reg_r(gspca_dev, STK1135_REG_SICTL + 1);
129 if (i++ > 500) { /* maximum retry count */
130 pr_err("serial bus timeout: status=0x%02x\n", val);
131 return -1;
132 }
133 /* repeat if BUSY or WRITE/READ not finished */
134 } while ((val & 0x10) || !(val & 0x05));
135
136 return 0;
137}
138
139static u8 sensor_read_8(struct gspca_dev *gspca_dev, u8 addr)
140{
141 reg_w(gspca_dev, STK1135_REG_SBUSR, addr);
142 /* begin read */
143 reg_w(gspca_dev, STK1135_REG_SICTL, 0x20);
144 /* wait until finished */
145 if (stk1135_serial_wait_ready(gspca_dev)) {
146 pr_err("Sensor read failed\n");
147 return 0;
148 }
149
150 return reg_r(gspca_dev, STK1135_REG_SBUSR + 1);
151}
152
153static u16 sensor_read_16(struct gspca_dev *gspca_dev, u8 addr)
154{
155 return (sensor_read_8(gspca_dev, addr) << 8) |
156 sensor_read_8(gspca_dev, 0xf1);
157}
158
159static void sensor_write_8(struct gspca_dev *gspca_dev, u8 addr, u8 data)
160{
161 /* load address and data registers */
162 reg_w(gspca_dev, STK1135_REG_SBUSW, addr);
163 reg_w(gspca_dev, STK1135_REG_SBUSW + 1, data);
164 /* begin write */
165 reg_w(gspca_dev, STK1135_REG_SICTL, 0x01);
166 /* wait until finished */
167 if (stk1135_serial_wait_ready(gspca_dev)) {
168 pr_err("Sensor write failed\n");
169 return;
170 }
171}
172
173static void sensor_write_16(struct gspca_dev *gspca_dev, u8 addr, u16 data)
174{
175 sensor_write_8(gspca_dev, addr, data >> 8);
176 sensor_write_8(gspca_dev, 0xf1, data & 0xff);
177}
178
179static void sensor_set_page(struct gspca_dev *gspca_dev, u8 page)
180{
181 struct sd *sd = (struct sd *) gspca_dev;
182
183 if (page != sd->sensor_page) {
184 sensor_write_16(gspca_dev, 0xf0, page);
185 sd->sensor_page = page;
186 }
187}
188
189static u16 sensor_read(struct gspca_dev *gspca_dev, u16 reg)
190{
191 sensor_set_page(gspca_dev, reg >> 8);
192 return sensor_read_16(gspca_dev, reg & 0xff);
193}
194
195static void sensor_write(struct gspca_dev *gspca_dev, u16 reg, u16 val)
196{
197 sensor_set_page(gspca_dev, reg >> 8);
198 sensor_write_16(gspca_dev, reg & 0xff, val);
199}
200
201static void sensor_write_mask(struct gspca_dev *gspca_dev,
202 u16 reg, u16 val, u16 mask)
203{
204 val = (sensor_read(gspca_dev, reg) & ~mask) | (val & mask);
205 sensor_write(gspca_dev, reg, val);
206}
207
208struct sensor_val {
209 u16 reg;
210 u16 val;
211};
212
213/* configure MT9M112 sensor */
214static void stk1135_configure_mt9m112(struct gspca_dev *gspca_dev)
215{
216 static const struct sensor_val cfg[] = {
217 /* restart&reset, chip enable, reserved */
218 { 0x00d, 0x000b }, { 0x00d, 0x0008 }, { 0x035, 0x0022 },
219 /* mode ctl: AWB on, AE both, clip aper corr, defect corr, AE */
220 { 0x106, 0x700e },
221
222 { 0x2dd, 0x18e0 }, /* B-R thresholds, */
223
224 /* AWB */
225 { 0x21f, 0x0180 }, /* Cb and Cr limits */
226 { 0x220, 0xc814 }, { 0x221, 0x8080 }, /* lum limits, RGB gain */
227 { 0x222, 0xa078 }, { 0x223, 0xa078 }, /* R, B limit */
228 { 0x224, 0x5f20 }, { 0x228, 0xea02 }, /* mtx adj lim, adv ctl */
229 { 0x229, 0x867a }, /* wide gates */
230
231 /* Color correction */
232 /* imager gains base, delta, delta signs */
233 { 0x25e, 0x594c }, { 0x25f, 0x4d51 }, { 0x260, 0x0002 },
234 /* AWB adv ctl 2, gain offs */
235 { 0x2ef, 0x0008 }, { 0x2f2, 0x0000 },
236 /* base matrix signs, scale K1-5, K6-9 */
237 { 0x202, 0x00ee }, { 0x203, 0x3923 }, { 0x204, 0x0724 },
238 /* base matrix coef */
239 { 0x209, 0x00cd }, { 0x20a, 0x0093 }, { 0x20b, 0x0004 },/*K1-3*/
240 { 0x20c, 0x005c }, { 0x20d, 0x00d9 }, { 0x20e, 0x0053 },/*K4-6*/
241 { 0x20f, 0x0008 }, { 0x210, 0x0091 }, { 0x211, 0x00cf },/*K7-9*/
242 { 0x215, 0x0000 }, /* delta mtx signs */
243 /* delta matrix coef */
244 { 0x216, 0x0000 }, { 0x217, 0x0000 }, { 0x218, 0x0000 },/*D1-3*/
245 { 0x219, 0x0000 }, { 0x21a, 0x0000 }, { 0x21b, 0x0000 },/*D4-6*/
246 { 0x21c, 0x0000 }, { 0x21d, 0x0000 }, { 0x21e, 0x0000 },/*D7-9*/
247 /* enable & disable manual WB to apply color corr. settings */
248 { 0x106, 0xf00e }, { 0x106, 0x700e },
249
250 /* Lens shading correction */
251 { 0x180, 0x0007 }, /* control */
252 /* vertical knee 0, 2+1, 4+3 */
253 { 0x181, 0xde13 }, { 0x182, 0xebe2 }, { 0x183, 0x00f6 }, /* R */
254 { 0x184, 0xe114 }, { 0x185, 0xeadd }, { 0x186, 0xfdf6 }, /* G */
255 { 0x187, 0xe511 }, { 0x188, 0xede6 }, { 0x189, 0xfbf7 }, /* B */
256 /* horizontal knee 0, 2+1, 4+3, 5 */
257 { 0x18a, 0xd613 }, { 0x18b, 0xedec }, /* R .. */
258 { 0x18c, 0xf9f2 }, { 0x18d, 0x0000 }, /* .. R */
259 { 0x18e, 0xd815 }, { 0x18f, 0xe9ea }, /* G .. */
260 { 0x190, 0xf9f1 }, { 0x191, 0x0002 }, /* .. G */
261 { 0x192, 0xde10 }, { 0x193, 0xefef }, /* B .. */
262 { 0x194, 0xfbf4 }, { 0x195, 0x0002 }, /* .. B */
263 /* vertical knee 6+5, 8+7 */
264 { 0x1b6, 0x0e06 }, { 0x1b7, 0x2713 }, /* R */
265 { 0x1b8, 0x1106 }, { 0x1b9, 0x2713 }, /* G */
266 { 0x1ba, 0x0c03 }, { 0x1bb, 0x2a0f }, /* B */
267 /* horizontal knee 7+6, 9+8, 10 */
268 { 0x1bc, 0x1208 }, { 0x1bd, 0x1a16 }, { 0x1be, 0x0022 }, /* R */
269 { 0x1bf, 0x150a }, { 0x1c0, 0x1c1a }, { 0x1c1, 0x002d }, /* G */
270 { 0x1c2, 0x1109 }, { 0x1c3, 0x1414 }, { 0x1c4, 0x002a }, /* B */
271 { 0x106, 0x740e }, /* enable lens shading correction */
272
273 /* Gamma correction - context A */
274 { 0x153, 0x0b03 }, { 0x154, 0x4722 }, { 0x155, 0xac82 },
275 { 0x156, 0xdac7 }, { 0x157, 0xf5e9 }, { 0x158, 0xff00 },
276 /* Gamma correction - context B */
277 { 0x1dc, 0x0b03 }, { 0x1dd, 0x4722 }, { 0x1de, 0xac82 },
278 { 0x1df, 0xdac7 }, { 0x1e0, 0xf5e9 }, { 0x1e1, 0xff00 },
279
280 /* output format: RGB, invert output pixclock, output bayer */
281 { 0x13a, 0x4300 }, { 0x19b, 0x4300 }, /* for context A, B */
282 { 0x108, 0x0180 }, /* format control - enable bayer row flip */
283
284 { 0x22f, 0xd100 }, { 0x29c, 0xd100 }, /* AE A, B */
285
286 /* default prg conf, prg ctl - by 0x2d2, prg advance - PA1 */
287 { 0x2d2, 0x0000 }, { 0x2cc, 0x0004 }, { 0x2cb, 0x0001 },
288
289 { 0x22e, 0x0c3c }, { 0x267, 0x1010 }, /* AE tgt ctl, gain lim */
290
291 /* PLL */
292 { 0x065, 0xa000 }, /* clk ctl - enable PLL (clear bit 14) */
293 { 0x066, 0x2003 }, { 0x067, 0x0501 }, /* PLL M=128, N=3, P=1 */
294 { 0x065, 0x2000 }, /* disable PLL bypass (clear bit 15) */
295
296 { 0x005, 0x01b8 }, { 0x007, 0x00d8 }, /* horiz blanking B, A */
297
298 /* AE line size, shutter delay limit */
299 { 0x239, 0x06c0 }, { 0x23b, 0x040e }, /* for context A */
300 { 0x23a, 0x06c0 }, { 0x23c, 0x0564 }, /* for context B */
301 /* shutter width basis 60Hz, 50Hz */
302 { 0x257, 0x0208 }, { 0x258, 0x0271 }, /* for context A */
303 { 0x259, 0x0209 }, { 0x25a, 0x0271 }, /* for context B */
304
305 { 0x25c, 0x120d }, { 0x25d, 0x1712 }, /* flicker 60Hz, 50Hz */
306 { 0x264, 0x5e1c }, /* reserved */
307 /* flicker, AE gain limits, gain zone limits */
308 { 0x25b, 0x0003 }, { 0x236, 0x7810 }, { 0x237, 0x8304 },
309
310 { 0x008, 0x0021 }, /* vert blanking A */
311 };
312 int i;
313 u16 width, height;
314
315 for (i = 0; i < ARRAY_SIZE(cfg); i++)
316 sensor_write(gspca_dev, cfg[i].reg, cfg[i].val);
317
318 /* set output size */
1966bc2a
OZ		 319 width = gspca_dev->pixfmt.width;
320 height = gspca_dev->pixfmt.height;
76e05987 321 if (width <= 640 && height <= 512) { /* context A (half readout speed)*/
4ab0620b
OZ		 322 sensor_write(gspca_dev, 0x1a7, width);
323 sensor_write(gspca_dev, 0x1aa, height);
324 /* set read mode context A */
325 sensor_write(gspca_dev, 0x0c8, 0x0000);
326 /* set resize, read mode, vblank, hblank context A */
327 sensor_write(gspca_dev, 0x2c8, 0x0000);
76e05987 328 } else { /* context B (full readout speed) */
4ab0620b
OZ		 329 sensor_write(gspca_dev, 0x1a1, width);
330 sensor_write(gspca_dev, 0x1a4, height);
331 /* set read mode context B */
332 sensor_write(gspca_dev, 0x0c8, 0x0008);
333 /* set resize, read mode, vblank, hblank context B */
334 sensor_write(gspca_dev, 0x2c8, 0x040b);
335 }
336}
337
338static void stk1135_configure_clock(struct gspca_dev *gspca_dev)
339{
340 /* configure SCLKOUT */
341 reg_w(gspca_dev, STK1135_REG_TMGEN, 0x12);
342 /* set 1 clock per pixel */
343 /* and positive edge clocked pulse high when pixel counter = 0 */
344 reg_w(gspca_dev, STK1135_REG_TCP1 + 0, 0x41);
345 reg_w(gspca_dev, STK1135_REG_TCP1 + 1, 0x00);
346 reg_w(gspca_dev, STK1135_REG_TCP1 + 2, 0x00);
347 reg_w(gspca_dev, STK1135_REG_TCP1 + 3, 0x00);
348
349 /* enable CLKOUT for sensor */
350 reg_w(gspca_dev, STK1135_REG_SENSO + 0, 0x10);
351 /* disable STOP clock */
352 reg_w(gspca_dev, STK1135_REG_SENSO + 1, 0x00);
353 /* set lower 8 bits of PLL feedback divider */
354 reg_w(gspca_dev, STK1135_REG_SENSO + 3, 0x07);
355 /* set other PLL parameters */
356 reg_w(gspca_dev, STK1135_REG_PLLFD, 0x06);
357 /* enable timing generator */
358 reg_w(gspca_dev, STK1135_REG_TMGEN, 0x80);
359 /* enable PLL */
360 reg_w(gspca_dev, STK1135_REG_SENSO + 2, 0x04);
361
362 /* set serial interface clock divider (30MHz/0x1f*16+2) = 60240 kHz) */
363 reg_w(gspca_dev, STK1135_REG_SICTL + 2, 0x1f);
4fd1fb7a
OZ		 364
365 /* wait a while for sensor to catch up */
366 udelay(1000);
4ab0620b
OZ		 367}
368
369static void stk1135_camera_disable(struct gspca_dev *gspca_dev)
370{
371 /* set capture end Y position to 0 */
372 reg_w(gspca_dev, STK1135_REG_CIEPO + 2, 0x00);
373 reg_w(gspca_dev, STK1135_REG_CIEPO + 3, 0x00);
374 /* disable capture */
375 reg_w_mask(gspca_dev, STK1135_REG_SCTRL, 0x00, 0x80);
376
377 /* enable sensor standby and diasble chip enable */
378 sensor_write_mask(gspca_dev, 0x00d, 0x0004, 0x000c);
379
380 /* disable PLL */
381 reg_w_mask(gspca_dev, STK1135_REG_SENSO + 2, 0x00, 0x01);
382 /* disable timing generator */
383 reg_w(gspca_dev, STK1135_REG_TMGEN, 0x00);
384 /* enable STOP clock */
385 reg_w(gspca_dev, STK1135_REG_SENSO + 1, 0x20);
386 /* disable CLKOUT for sensor */
387 reg_w(gspca_dev, STK1135_REG_SENSO, 0x00);
388
389 /* disable sensor (GPIO5) and enable GPIO0,3,6 (?) - sensor standby? */
390 reg_w(gspca_dev, STK1135_REG_GCTRL, 0x49);
391}
392
393/* this function is called at probe and resume time */
394static int sd_init(struct gspca_dev *gspca_dev)
395{
396 u16 sensor_id;
397 char *sensor_name;
398 struct sd *sd = (struct sd *) gspca_dev;
399
400 /* set GPIO3,4,5,6 direction to output */
401 reg_w(gspca_dev, STK1135_REG_GCTRL + 2, 0x78);
402 /* enable sensor (GPIO5) */
403 reg_w(gspca_dev, STK1135_REG_GCTRL, (1 << 5));
404 /* disable ROM interface */
405 reg_w(gspca_dev, STK1135_REG_GCTRL + 3, 0x80);
406 /* enable interrupts from GPIO8 (flip sensor) and GPIO9 (???) */
407 reg_w(gspca_dev, STK1135_REG_ICTRL + 1, 0x00);
408 reg_w(gspca_dev, STK1135_REG_ICTRL + 3, 0x03);
409 /* enable remote wakeup from GPIO9 (???) */
410 reg_w(gspca_dev, STK1135_REG_RMCTL + 1, 0x00);
411 reg_w(gspca_dev, STK1135_REG_RMCTL + 3, 0x02);
412
413 /* reset serial interface */
414 reg_w(gspca_dev, STK1135_REG_SICTL, 0x80);
415 reg_w(gspca_dev, STK1135_REG_SICTL, 0x00);
416 /* set sensor address */
417 reg_w(gspca_dev, STK1135_REG_SICTL + 3, 0xba);
418 /* disable alt 2-wire serial interface */
419 reg_w(gspca_dev, STK1135_REG_ASIC + 3, 0x00);
420
421 stk1135_configure_clock(gspca_dev);
422
423 /* read sensor ID */
424 sd->sensor_page = 0xff;
425 sensor_id = sensor_read(gspca_dev, 0x000);
426
427 switch (sensor_id) {
428 case 0x148c:
429 sensor_name = "MT9M112";
430 break;
431 default:
432 sensor_name = "unknown";
433 }
434 pr_info("Detected sensor type %s (0x%x)\n", sensor_name, sensor_id);
435
436 stk1135_camera_disable(gspca_dev);
437
438 return gspca_dev->usb_err;
439}
440
441/* -- start the camera -- */
442static int sd_start(struct gspca_dev *gspca_dev)
443{
444 struct sd *sd = (struct sd *) gspca_dev;
445 u16 width, height;
446
447 /* enable sensor (GPIO5) */
448 reg_w(gspca_dev, STK1135_REG_GCTRL, (1 << 5));
449
450 stk1135_configure_clock(gspca_dev);
451
452 /* set capture start position X = 0, Y = 0 */
453 reg_w(gspca_dev, STK1135_REG_CISPO + 0, 0x00);
454 reg_w(gspca_dev, STK1135_REG_CISPO + 1, 0x00);
455 reg_w(gspca_dev, STK1135_REG_CISPO + 2, 0x00);
456 reg_w(gspca_dev, STK1135_REG_CISPO + 3, 0x00);
457
458 /* set capture end position */
1966bc2a
OZ		 459 width = gspca_dev->pixfmt.width;
460 height = gspca_dev->pixfmt.height;
4ab0620b
OZ		 461 reg_w(gspca_dev, STK1135_REG_CIEPO + 0, width & 0xff);
462 reg_w(gspca_dev, STK1135_REG_CIEPO + 1, width >> 8);
463 reg_w(gspca_dev, STK1135_REG_CIEPO + 2, height & 0xff);
464 reg_w(gspca_dev, STK1135_REG_CIEPO + 3, height >> 8);
465
466 /* set 8-bit mode */
467 reg_w(gspca_dev, STK1135_REG_SCTRL, 0x20);
468
469 stk1135_configure_mt9m112(gspca_dev);
470
471 /* enable capture */
472 reg_w_mask(gspca_dev, STK1135_REG_SCTRL, 0x80, 0x80);
473
474 if (gspca_dev->usb_err >= 0)
475 PDEBUG(D_STREAM, "camera started alt: 0x%02x",
476 gspca_dev->alt);
477
478 sd->pkt_seq = 0;
479
480 return gspca_dev->usb_err;
481}
482
483static void sd_stopN(struct gspca_dev *gspca_dev)
484{
485 struct usb_device *dev = gspca_dev->dev;
486
487 usb_set_interface(dev, gspca_dev->iface, 0);
488
489 stk1135_camera_disable(gspca_dev);
490
491 PDEBUG(D_STREAM, "camera stopped");
492}
493
494static void sd_pkt_scan(struct gspca_dev *gspca_dev,
495 u8 *data, /* isoc packet */
496 int len) /* iso packet length */
497{
498 struct sd *sd = (struct sd *) gspca_dev;
499 int skip = sizeof(struct stk1135_pkt_header);
500 bool flip;
501 enum gspca_packet_type pkt_type = INTER_PACKET;
502 struct stk1135_pkt_header *hdr = (void *)data;
503 u8 seq;
504
505 if (len < 4) {
506 PDEBUG(D_PACK, "received short packet (less than 4 bytes)");
507 return;
508 }
509
510 /* GPIO 8 is flip sensor (1 = normal position, 0 = flipped to back) */
511 flip = !(le16_to_cpu(hdr->gpio) & (1 << 8));
512 /* it's a switch, needs software debounce */
513 if (sd->flip_status != flip)
514 sd->flip_debounce++;
515 else
516 sd->flip_debounce = 0;
517
518 /* check sequence number (not present in new frame packets) */
519 if (!(hdr->flags & STK1135_HDR_FRAME_START)) {
520 seq = hdr->seq & STK1135_HDR_SEQ_MASK;
521 if (seq != sd->pkt_seq) {
522 PDEBUG(D_PACK, "received out-of-sequence packet");
523 /* resync sequence and discard packet */
524 sd->pkt_seq = seq;
525 gspca_dev->last_packet_type = DISCARD_PACKET;
526 return;
527 }
528 }
529 sd->pkt_seq++;
530 if (sd->pkt_seq > STK1135_HDR_SEQ_MASK)
531 sd->pkt_seq = 0;
532
533 if (len == sizeof(struct stk1135_pkt_header))
534 return;
535
536 if (hdr->flags & STK1135_HDR_FRAME_START) { /* new frame */
537 skip = 8; /* the header is longer */
538 gspca_frame_add(gspca_dev, LAST_PACKET, data, 0);
539 pkt_type = FIRST_PACKET;
540 }
541 gspca_frame_add(gspca_dev, pkt_type, data + skip, len - skip);
542}
543
544static void sethflip(struct gspca_dev *gspca_dev, s32 val)
545{
546 struct sd *sd = (struct sd *) gspca_dev;
547
548 if (sd->flip_status)
549 val = !val;
550 sensor_write_mask(gspca_dev, 0x020, val ? 0x0002 : 0x0000 , 0x0002);
551}
552
553static void setvflip(struct gspca_dev *gspca_dev, s32 val)
554{
555 struct sd *sd = (struct sd *) gspca_dev;
556
557 if (sd->flip_status)
558 val = !val;
559 sensor_write_mask(gspca_dev, 0x020, val ? 0x0001 : 0x0000 , 0x0001);
560}
561
562static void stk1135_dq_callback(struct gspca_dev *gspca_dev)
563{
564 struct sd *sd = (struct sd *) gspca_dev;
565
566 if (sd->flip_debounce > 100) {
567 sd->flip_status = !sd->flip_status;
568 sethflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->hflip));
569 setvflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->vflip));
570 }
571}
572
573static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
574{
575 struct gspca_dev *gspca_dev =
576 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
577
578 gspca_dev->usb_err = 0;
579
580 if (!gspca_dev->streaming)
581 return 0;
582
583 switch (ctrl->id) {
584 case V4L2_CID_HFLIP:
585 sethflip(gspca_dev, ctrl->val);
586 break;
587 case V4L2_CID_VFLIP:
588 setvflip(gspca_dev, ctrl->val);
589 break;
590 }
591
592 return gspca_dev->usb_err;
593}
594
595static const struct v4l2_ctrl_ops sd_ctrl_ops = {
596 .s_ctrl = sd_s_ctrl,
597};
598
599static int sd_init_controls(struct gspca_dev *gspca_dev)
600{
601 struct sd *sd = (struct sd *) gspca_dev;
602 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
603
604 gspca_dev->vdev.ctrl_handler = hdl;
605 v4l2_ctrl_handler_init(hdl, 2);
606 sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
607 V4L2_CID_HFLIP, 0, 1, 1, 0);
608 sd->vflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
609 V4L2_CID_VFLIP, 0, 1, 1, 0);
610
611 if (hdl->error) {
612 pr_err("Could not initialize controls\n");
613 return hdl->error;
614 }
615 return 0;
616}
617
cbbe1c03 618static void stk1135_try_fmt(struct gspca_dev *gspca_dev, struct v4l2_format *fmt)
76e05987
OZ		 619{
620 fmt->fmt.pix.width = clamp(fmt->fmt.pix.width, 32U, 1280U);
621 fmt->fmt.pix.height = clamp(fmt->fmt.pix.height, 32U, 1024U);
622 /* round up to even numbers */
623 fmt->fmt.pix.width += (fmt->fmt.pix.width & 1);
624 fmt->fmt.pix.height += (fmt->fmt.pix.height & 1);
625
626 fmt->fmt.pix.bytesperline = fmt->fmt.pix.width;
627 fmt->fmt.pix.sizeimage = fmt->fmt.pix.width * fmt->fmt.pix.height;
628}
629
cbbe1c03 630static int stk1135_enum_framesizes(struct gspca_dev *gspca_dev,
76e05987
OZ		 631 struct v4l2_frmsizeenum *fsize)
632{
633 if (fsize->index != 0 || fsize->pixel_format != V4L2_PIX_FMT_SBGGR8)
634 return -EINVAL;
635
636 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
637 fsize->stepwise.min_width = 32;
638 fsize->stepwise.min_height = 32;
639 fsize->stepwise.max_width = 1280;
640 fsize->stepwise.max_height = 1024;
641 fsize->stepwise.step_width = 2;
642 fsize->stepwise.step_height = 2;
643
644 return 0;
645}
646
4ab0620b
OZ		 647/* sub-driver description */
648static const struct sd_desc sd_desc = {
649 .name = MODULE_NAME,
650 .config = sd_config,
651 .init = sd_init,
652 .init_controls = sd_init_controls,
653 .start = sd_start,
654 .stopN = sd_stopN,
655 .pkt_scan = sd_pkt_scan,
656 .dq_callback = stk1135_dq_callback,
76e05987
OZ		 657 .try_fmt = stk1135_try_fmt,
658 .enum_framesizes = stk1135_enum_framesizes,
4ab0620b
OZ		 659};
660
661/* -- module initialisation -- */
662static const struct usb_device_id device_table[] = {
663 {USB_DEVICE(0x174f, 0x6a31)}, /* ASUS laptop, MT9M112 sensor */
664 {}
665};
666MODULE_DEVICE_TABLE(usb, device_table);
667
668/* -- device connect -- */
669static int sd_probe(struct usb_interface *intf,
670 const struct usb_device_id *id)
671{
672 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
673 THIS_MODULE);
674}
675
676static struct usb_driver sd_driver = {
677 .name = MODULE_NAME,
678 .id_table = device_table,
679 .probe = sd_probe,
680 .disconnect = gspca_disconnect,
681#ifdef CONFIG_PM
682 .suspend = gspca_suspend,
683 .resume = gspca_resume,
684 .reset_resume = gspca_resume,
685#endif
686};
687
688module_usb_driver(sd_driver);
Linux 6.x block layer and io_uring tree(s)