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9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/spi/spi.h>
12#include <linux/platform_device.h>
13#include <linux/ctype.h>
14#include <linux/err.h>
15#include <linux/device.h>
16#include <linux/module.h>
17
18#include <linux/videodev2.h>
19#include <media/v4l2-common.h>
20#include <media/v4l2-ctrls.h>
21#include <media/v4l2-device.h>
22#include <media/v4l2-subdev.h>
23#include <media/v4l2-dv-timings.h>
24#include <linux/v4l2-dv-timings.h>
25
26#define REG_STATUS 0x04
27#define REG_FORCE_FMT 0x06
28#define REG_LINES_PER_FRAME 0x12
29#define REG_WORDS_PER_LINE 0x13
30#define REG_WORDS_PER_ACT_LINE 0x14
31#define REG_ACT_LINES_PER_FRAME 0x15
32
33#define MASK_H_LOCK 0x001
34#define MASK_V_LOCK 0x002
35#define MASK_STD_LOCK 0x004
36#define MASK_FORCE_STD 0x020
37#define MASK_STD_STATUS 0x3E0
38
39#define GS_WIDTH_MIN 720
40#define GS_WIDTH_MAX 2048
41#define GS_HEIGHT_MIN 487
42#define GS_HEIGHT_MAX 1080
43#define GS_PIXELCLOCK_MIN 10519200
44#define GS_PIXELCLOCK_MAX 74250000
45
46struct gs {
47 struct spi_device *pdev;
48 struct v4l2_subdev sd;
49 struct v4l2_dv_timings current_timings;
50 int enabled;
51};
52
53struct gs_reg_fmt {
54 u16 reg_value;
55 struct v4l2_dv_timings format;
56};
57
58struct gs_reg_fmt_custom {
59 u16 reg_value;
60 __u32 width;
61 __u32 height;
62 __u64 pixelclock;
63 __u32 interlaced;
64};
65
66static const struct spi_device_id gs_id[] = {
67 { "gs1662", 0 },
68 { }
69};
70MODULE_DEVICE_TABLE(spi, gs_id);
71
72static const struct v4l2_dv_timings fmt_cap[] = {
73 V4L2_DV_BT_SDI_720X487I60,
74 V4L2_DV_BT_CEA_720X576P50,
75 V4L2_DV_BT_CEA_1280X720P24,
76 V4L2_DV_BT_CEA_1280X720P25,
77 V4L2_DV_BT_CEA_1280X720P30,
78 V4L2_DV_BT_CEA_1280X720P50,
79 V4L2_DV_BT_CEA_1280X720P60,
80 V4L2_DV_BT_CEA_1920X1080P24,
81 V4L2_DV_BT_CEA_1920X1080P25,
82 V4L2_DV_BT_CEA_1920X1080P30,
83 V4L2_DV_BT_CEA_1920X1080I50,
84 V4L2_DV_BT_CEA_1920X1080I60,
85};
86
87static const struct gs_reg_fmt reg_fmt[] = {
88 { 0x00, V4L2_DV_BT_CEA_1280X720P60 },
89 { 0x01, V4L2_DV_BT_CEA_1280X720P60 },
90 { 0x02, V4L2_DV_BT_CEA_1280X720P30 },
91 { 0x03, V4L2_DV_BT_CEA_1280X720P30 },
92 { 0x04, V4L2_DV_BT_CEA_1280X720P50 },
93 { 0x05, V4L2_DV_BT_CEA_1280X720P50 },
94 { 0x06, V4L2_DV_BT_CEA_1280X720P25 },
95 { 0x07, V4L2_DV_BT_CEA_1280X720P25 },
96 { 0x08, V4L2_DV_BT_CEA_1280X720P24 },
97 { 0x09, V4L2_DV_BT_CEA_1280X720P24 },
98 { 0x0A, V4L2_DV_BT_CEA_1920X1080I60 },
99 { 0x0B, V4L2_DV_BT_CEA_1920X1080P30 },
100
101
102 { 0x14, V4L2_DV_BT_CEA_1920X1080I50 },
103 { 0x0C, V4L2_DV_BT_CEA_1920X1080I50 },
104 { 0x0D, V4L2_DV_BT_CEA_1920X1080P25 },
105 { 0x0E, V4L2_DV_BT_CEA_1920X1080P25 },
106 { 0x10, V4L2_DV_BT_CEA_1920X1080P24 },
107 { 0x12, V4L2_DV_BT_CEA_1920X1080P24 },
108 { 0x16, V4L2_DV_BT_SDI_720X487I60 },
109 { 0x19, V4L2_DV_BT_SDI_720X487I60 },
110 { 0x18, V4L2_DV_BT_CEA_720X576P50 },
111 { 0x1A, V4L2_DV_BT_CEA_720X576P50 },
112
113
114
115
116
117#if 0
118 { 0x0F, V4L2_DV_BT_XXX_1920X1080I25 },
119 { 0x11, V4L2_DV_BT_XXX_1920X1080I24 },
120 { 0x13, V4L2_DV_BT_XXX_1920X1080I25 },
121 { 0x15, V4L2_DV_BT_XXX_1920X1035I60 },
122 { 0x17, V4L2_DV_BT_SDI_720X507I60 },
123 { 0x1B, V4L2_DV_BT_SDI_720X507I60 },
124 { 0x1C, V4L2_DV_BT_XXX_2048X1080P25 },
125#endif
126};
127
128static const struct v4l2_dv_timings_cap gs_timings_cap = {
129 .type = V4L2_DV_BT_656_1120,
130
131 .reserved = { 0 },
132 V4L2_INIT_BT_TIMINGS(GS_WIDTH_MIN, GS_WIDTH_MAX, GS_HEIGHT_MIN,
133 GS_HEIGHT_MAX, GS_PIXELCLOCK_MIN,
134 GS_PIXELCLOCK_MAX,
135 V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_SDI,
136 V4L2_DV_BT_CAP_PROGRESSIVE
137 | V4L2_DV_BT_CAP_INTERLACED)
138};
139
140static int gs_read_register(struct spi_device *spi, u16 addr, u16 *value)
141{
142 int ret;
143 u16 buf_addr = (0x8000 | (0x0FFF & addr));
144 u16 buf_value = 0;
145 struct spi_message msg;
146 struct spi_transfer tx[] = {
147 {
148 .tx_buf = &buf_addr,
149 .len = 2,
150 .delay_usecs = 1,
151 }, {
152 .rx_buf = &buf_value,
153 .len = 2,
154 .delay_usecs = 1,
155 },
156 };
157
158 spi_message_init(&msg);
159 spi_message_add_tail(&tx[0], &msg);
160 spi_message_add_tail(&tx[1], &msg);
161 ret = spi_sync(spi, &msg);
162
163 *value = buf_value;
164
165 return ret;
166}
167
168static int gs_write_register(struct spi_device *spi, u16 addr, u16 value)
169{
170 int ret;
171 u16 buf_addr = addr;
172 u16 buf_value = value;
173 struct spi_message msg;
174 struct spi_transfer tx[] = {
175 {
176 .tx_buf = &buf_addr,
177 .len = 2,
178 .delay_usecs = 1,
179 }, {
180 .tx_buf = &buf_value,
181 .len = 2,
182 .delay_usecs = 1,
183 },
184 };
185
186 spi_message_init(&msg);
187 spi_message_add_tail(&tx[0], &msg);
188 spi_message_add_tail(&tx[1], &msg);
189 ret = spi_sync(spi, &msg);
190
191 return ret;
192}
193
194#ifdef CONFIG_VIDEO_ADV_DEBUG
195static int gs_g_register(struct v4l2_subdev *sd,
196 struct v4l2_dbg_register *reg)
197{
198 struct spi_device *spi = v4l2_get_subdevdata(sd);
199 u16 val;
200 int ret;
201
202 ret = gs_read_register(spi, reg->reg & 0xFFFF, &val);
203 reg->val = val;
204 reg->size = 2;
205 return ret;
206}
207
208static int gs_s_register(struct v4l2_subdev *sd,
209 const struct v4l2_dbg_register *reg)
210{
211 struct spi_device *spi = v4l2_get_subdevdata(sd);
212
213 return gs_write_register(spi, reg->reg & 0xFFFF, reg->val & 0xFFFF);
214}
215#endif
216
217static int gs_status_format(u16 status, struct v4l2_dv_timings *timings)
218{
219 int std = (status & MASK_STD_STATUS) >> 5;
220 int i;
221
222 for (i = 0; i < ARRAY_SIZE(reg_fmt); i++) {
223 if (reg_fmt[i].reg_value == std) {
224 *timings = reg_fmt[i].format;
225 return 0;
226 }
227 }
228
229 return -ERANGE;
230}
231
232static u16 get_register_timings(struct v4l2_dv_timings *timings)
233{
234 int i;
235
236 for (i = 0; i < ARRAY_SIZE(reg_fmt); i++) {
237 if (v4l2_match_dv_timings(timings, ®_fmt[i].format, 0,
238 false))
239 return reg_fmt[i].reg_value | MASK_FORCE_STD;
240 }
241
242 return 0x0;
243}
244
245static inline struct gs *to_gs(struct v4l2_subdev *sd)
246{
247 return container_of(sd, struct gs, sd);
248}
249
250static int gs_s_dv_timings(struct v4l2_subdev *sd,
251 struct v4l2_dv_timings *timings)
252{
253 struct gs *gs = to_gs(sd);
254 int reg_value;
255
256 reg_value = get_register_timings(timings);
257 if (reg_value == 0x0)
258 return -EINVAL;
259
260 gs->current_timings = *timings;
261 return 0;
262}
263
264static int gs_g_dv_timings(struct v4l2_subdev *sd,
265 struct v4l2_dv_timings *timings)
266{
267 struct gs *gs = to_gs(sd);
268
269 *timings = gs->current_timings;
270 return 0;
271}
272
273static int gs_query_dv_timings(struct v4l2_subdev *sd,
274 struct v4l2_dv_timings *timings)
275{
276 struct gs *gs = to_gs(sd);
277 struct v4l2_dv_timings fmt;
278 u16 reg_value, i;
279 int ret;
280
281 if (gs->enabled)
282 return -EBUSY;
283
284
285
286
287
288 for (i = 0; i < 4; i++) {
289 gs_read_register(gs->pdev, REG_LINES_PER_FRAME + i, ®_value);
290 if (reg_value)
291 break;
292 }
293
294
295 if (i >= 4)
296 return -ENOLINK;
297
298 gs_read_register(gs->pdev, REG_STATUS, ®_value);
299 if (!(reg_value & MASK_H_LOCK) || !(reg_value & MASK_V_LOCK))
300 return -ENOLCK;
301 if (!(reg_value & MASK_STD_LOCK))
302 return -ERANGE;
303
304 ret = gs_status_format(reg_value, &fmt);
305
306 if (ret < 0)
307 return ret;
308
309 *timings = fmt;
310 return 0;
311}
312
313static int gs_enum_dv_timings(struct v4l2_subdev *sd,
314 struct v4l2_enum_dv_timings *timings)
315{
316 if (timings->index >= ARRAY_SIZE(fmt_cap))
317 return -EINVAL;
318
319 if (timings->pad != 0)
320 return -EINVAL;
321
322 timings->timings = fmt_cap[timings->index];
323 return 0;
324}
325
326static int gs_s_stream(struct v4l2_subdev *sd, int enable)
327{
328 struct gs *gs = to_gs(sd);
329 int reg_value;
330
331 if (gs->enabled == enable)
332 return 0;
333
334 gs->enabled = enable;
335
336 if (enable) {
337
338 reg_value = get_register_timings(&gs->current_timings);
339 return gs_write_register(gs->pdev, REG_FORCE_FMT, reg_value);
340 }
341
342
343 return gs_write_register(gs->pdev, REG_FORCE_FMT, 0x0);
344}
345
346static int gs_g_input_status(struct v4l2_subdev *sd, u32 *status)
347{
348 struct gs *gs = to_gs(sd);
349 u16 reg_value, i;
350 int ret;
351
352
353
354
355
356 for (i = 0; i < 4; i++) {
357 ret = gs_read_register(gs->pdev,
358 REG_LINES_PER_FRAME + i, ®_value);
359 if (reg_value)
360 break;
361 if (ret) {
362 *status = V4L2_IN_ST_NO_POWER;
363 return ret;
364 }
365 }
366
367
368 if (i >= 4)
369 *status |= V4L2_IN_ST_NO_SIGNAL;
370
371 ret = gs_read_register(gs->pdev, REG_STATUS, ®_value);
372 if (!(reg_value & MASK_H_LOCK))
373 *status |= V4L2_IN_ST_NO_H_LOCK;
374 if (!(reg_value & MASK_V_LOCK))
375 *status |= V4L2_IN_ST_NO_V_LOCK;
376 if (!(reg_value & MASK_STD_LOCK))
377 *status |= V4L2_IN_ST_NO_STD_LOCK;
378
379 return ret;
380}
381
382static int gs_dv_timings_cap(struct v4l2_subdev *sd,
383 struct v4l2_dv_timings_cap *cap)
384{
385 if (cap->pad != 0)
386 return -EINVAL;
387
388 *cap = gs_timings_cap;
389 return 0;
390}
391
392
393static const struct v4l2_subdev_core_ops gs_core_ops = {
394#ifdef CONFIG_VIDEO_ADV_DEBUG
395 .g_register = gs_g_register,
396 .s_register = gs_s_register,
397#endif
398};
399
400static const struct v4l2_subdev_video_ops gs_video_ops = {
401 .s_dv_timings = gs_s_dv_timings,
402 .g_dv_timings = gs_g_dv_timings,
403 .s_stream = gs_s_stream,
404 .g_input_status = gs_g_input_status,
405 .query_dv_timings = gs_query_dv_timings,
406};
407
408static const struct v4l2_subdev_pad_ops gs_pad_ops = {
409 .enum_dv_timings = gs_enum_dv_timings,
410 .dv_timings_cap = gs_dv_timings_cap,
411};
412
413
414static const struct v4l2_subdev_ops gs_ops = {
415 .core = &gs_core_ops,
416 .video = &gs_video_ops,
417 .pad = &gs_pad_ops,
418};
419
420static int gs_probe(struct spi_device *spi)
421{
422 int ret;
423 struct gs *gs;
424 struct v4l2_subdev *sd;
425
426 gs = devm_kzalloc(&spi->dev, sizeof(struct gs), GFP_KERNEL);
427 if (!gs)
428 return -ENOMEM;
429
430 gs->pdev = spi;
431 sd = &gs->sd;
432
433 spi->mode = SPI_MODE_0;
434 spi->irq = -1;
435 spi->max_speed_hz = 10000000;
436 spi->bits_per_word = 16;
437 ret = spi_setup(spi);
438 v4l2_spi_subdev_init(sd, spi, &gs_ops);
439
440 gs->current_timings = reg_fmt[0].format;
441 gs->enabled = 0;
442
443
444 gs_write_register(spi, 0x0, 0x300);
445
446 return ret;
447}
448
449static int gs_remove(struct spi_device *spi)
450{
451 struct v4l2_subdev *sd = spi_get_drvdata(spi);
452
453 v4l2_device_unregister_subdev(sd);
454
455 return 0;
456}
457
458static struct spi_driver gs_driver = {
459 .driver = {
460 .name = "gs1662",
461 },
462
463 .probe = gs_probe,
464 .remove = gs_remove,
465 .id_table = gs_id,
466};
467
468module_spi_driver(gs_driver);
469
470MODULE_LICENSE("GPL");
471MODULE_AUTHOR("Charles-Antoine Couret <charles-antoine.couret@nexvision.fr>");
472MODULE_DESCRIPTION("Gennum GS1662 HD/SD-SDI Serializer driver");
473
