1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * This is the driver for the STA2x11 Video Input Port. |
4 | * |
5 | * Copyright (C) 2012 ST Microelectronics |
6 | * author: Federico Vaga <federico.vaga@gmail.com> |
7 | * Copyright (C) 2010 WindRiver Systems, Inc. |
8 | * authors: Andreas Kies <andreas.kies@windriver.com> |
9 | * Vlad Lungu <vlad.lungu@windriver.com> |
10 | */ |
11 | |
12 | #include <linux/types.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | #include <linux/init.h> |
16 | #include <linux/videodev2.h> |
17 | #include <linux/kmod.h> |
18 | #include <linux/pci.h> |
19 | #include <linux/interrupt.h> |
20 | #include <linux/io.h> |
21 | #include <linux/gpio/consumer.h> |
22 | #include <linux/gpio.h> |
23 | #include <linux/i2c.h> |
24 | #include <linux/delay.h> |
25 | #include <media/v4l2-common.h> |
26 | #include <media/v4l2-device.h> |
27 | #include <media/v4l2-ctrls.h> |
28 | #include <media/v4l2-ioctl.h> |
29 | #include <media/v4l2-fh.h> |
30 | #include <media/v4l2-event.h> |
31 | #include <media/videobuf2-dma-contig.h> |
32 | |
33 | #include "sta2x11_vip.h" |
34 | |
35 | #define DRV_VERSION "1.3" |
36 | |
37 | #ifndef PCI_DEVICE_ID_STMICRO_VIP |
38 | #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D |
39 | #endif |
40 | |
41 | #define MAX_FRAMES 4 |
42 | |
43 | /*Register offsets*/ |
44 | #define DVP_CTL 0x00 |
45 | #define DVP_TFO 0x04 |
46 | #define DVP_TFS 0x08 |
47 | #define DVP_BFO 0x0C |
48 | #define DVP_BFS 0x10 |
49 | #define DVP_VTP 0x14 |
50 | #define DVP_VBP 0x18 |
51 | #define DVP_VMP 0x1C |
52 | #define DVP_ITM 0x98 |
53 | #define DVP_ITS 0x9C |
54 | #define DVP_STA 0xA0 |
55 | #define DVP_HLFLN 0xA8 |
56 | #define DVP_RGB 0xC0 |
57 | #define DVP_PKZ 0xF0 |
58 | |
59 | /*Register fields*/ |
60 | #define DVP_CTL_ENA 0x00000001 |
61 | #define DVP_CTL_RST 0x80000000 |
62 | #define DVP_CTL_DIS (~0x00040001) |
63 | |
64 | #define DVP_IT_VSB 0x00000008 |
65 | #define DVP_IT_VST 0x00000010 |
66 | #define DVP_IT_FIFO 0x00000020 |
67 | |
68 | #define DVP_HLFLN_SD 0x00000001 |
69 | |
70 | #define SAVE_COUNT 8 |
71 | #define AUX_COUNT 3 |
72 | #define IRQ_COUNT 1 |
73 | |
74 | |
75 | struct vip_buffer { |
76 | struct vb2_v4l2_buffer vb; |
77 | struct list_head list; |
78 | dma_addr_t dma; |
79 | }; |
80 | static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) |
81 | { |
82 | return container_of(vb2, struct vip_buffer, vb); |
83 | } |
84 | |
85 | /** |
86 | * struct sta2x11_vip - All internal data for one instance of device |
87 | * @v4l2_dev: device registered in v4l layer |
88 | * @video_dev: properties of our device |
89 | * @pdev: PCI device |
90 | * @adapter: contains I2C adapter information |
91 | * @register_save_area: All relevant register are saved here during suspend |
92 | * @decoder: contains information about video DAC |
93 | * @ctrl_hdl: handler for control framework |
94 | * @format: pixel format, fixed UYVY |
95 | * @std: video standard (e.g. PAL/NTSC) |
96 | * @input: input line for video signal ( 0 or 1 ) |
97 | * @disabled: Device is in power down state |
98 | * @slock: for excluse access of registers |
99 | * @vb_vidq: queue maintained by videobuf2 layer |
100 | * @buffer_list: list of buffer in use |
101 | * @sequence: sequence number of acquired buffer |
102 | * @active: current active buffer |
103 | * @lock: used in videobuf2 callback |
104 | * @v4l_lock: serialize its video4linux ioctls |
105 | * @tcount: Number of top frames |
106 | * @bcount: Number of bottom frames |
107 | * @overflow: Number of FIFO overflows |
108 | * @iomem: hardware base address |
109 | * @config: I2C and gpio config from platform |
110 | * |
111 | * All non-local data is accessed via this structure. |
112 | */ |
113 | struct sta2x11_vip { |
114 | struct v4l2_device v4l2_dev; |
115 | struct video_device video_dev; |
116 | struct pci_dev *pdev; |
117 | struct i2c_adapter *adapter; |
118 | unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; |
119 | struct v4l2_subdev *decoder; |
120 | struct v4l2_ctrl_handler ctrl_hdl; |
121 | |
122 | |
123 | struct v4l2_pix_format format; |
124 | v4l2_std_id std; |
125 | unsigned int input; |
126 | int disabled; |
127 | spinlock_t slock; |
128 | |
129 | struct vb2_queue vb_vidq; |
130 | struct list_head buffer_list; |
131 | unsigned int sequence; |
132 | struct vip_buffer *active; /* current active buffer */ |
133 | spinlock_t lock; /* Used in videobuf2 callback */ |
134 | struct mutex v4l_lock; |
135 | |
136 | /* Interrupt counters */ |
137 | int tcount, bcount; |
138 | int overflow; |
139 | |
140 | void __iomem *iomem; /* I/O Memory */ |
141 | struct vip_config *config; |
142 | }; |
143 | |
144 | static const unsigned int registers_to_save[AUX_COUNT] = { |
145 | DVP_HLFLN, DVP_RGB, DVP_PKZ |
146 | }; |
147 | |
148 | static struct v4l2_pix_format formats_50[] = { |
149 | { /*PAL interlaced */ |
150 | .width = 720, |
151 | .height = 576, |
152 | .pixelformat = V4L2_PIX_FMT_UYVY, |
153 | .field = V4L2_FIELD_INTERLACED, |
154 | .bytesperline = 720 * 2, |
155 | .sizeimage = 720 * 2 * 576, |
156 | .colorspace = V4L2_COLORSPACE_SMPTE170M}, |
157 | { /*PAL top */ |
158 | .width = 720, |
159 | .height = 288, |
160 | .pixelformat = V4L2_PIX_FMT_UYVY, |
161 | .field = V4L2_FIELD_TOP, |
162 | .bytesperline = 720 * 2, |
163 | .sizeimage = 720 * 2 * 288, |
164 | .colorspace = V4L2_COLORSPACE_SMPTE170M}, |
165 | { /*PAL bottom */ |
166 | .width = 720, |
167 | .height = 288, |
168 | .pixelformat = V4L2_PIX_FMT_UYVY, |
169 | .field = V4L2_FIELD_BOTTOM, |
170 | .bytesperline = 720 * 2, |
171 | .sizeimage = 720 * 2 * 288, |
172 | .colorspace = V4L2_COLORSPACE_SMPTE170M}, |
173 | |
174 | }; |
175 | |
176 | static struct v4l2_pix_format formats_60[] = { |
177 | { /*NTSC interlaced */ |
178 | .width = 720, |
179 | .height = 480, |
180 | .pixelformat = V4L2_PIX_FMT_UYVY, |
181 | .field = V4L2_FIELD_INTERLACED, |
182 | .bytesperline = 720 * 2, |
183 | .sizeimage = 720 * 2 * 480, |
184 | .colorspace = V4L2_COLORSPACE_SMPTE170M}, |
185 | { /*NTSC top */ |
186 | .width = 720, |
187 | .height = 240, |
188 | .pixelformat = V4L2_PIX_FMT_UYVY, |
189 | .field = V4L2_FIELD_TOP, |
190 | .bytesperline = 720 * 2, |
191 | .sizeimage = 720 * 2 * 240, |
192 | .colorspace = V4L2_COLORSPACE_SMPTE170M}, |
193 | { /*NTSC bottom */ |
194 | .width = 720, |
195 | .height = 240, |
196 | .pixelformat = V4L2_PIX_FMT_UYVY, |
197 | .field = V4L2_FIELD_BOTTOM, |
198 | .bytesperline = 720 * 2, |
199 | .sizeimage = 720 * 2 * 240, |
200 | .colorspace = V4L2_COLORSPACE_SMPTE170M}, |
201 | }; |
202 | |
203 | /* Write VIP register */ |
204 | static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) |
205 | { |
206 | iowrite32((val), (vip->iomem)+(reg)); |
207 | } |
208 | /* Read VIP register */ |
209 | static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) |
210 | { |
211 | return ioread32((vip->iomem)+(reg)); |
212 | } |
213 | /* Start DMA acquisition */ |
214 | static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) |
215 | { |
216 | unsigned long offset = 0; |
217 | |
218 | if (vip->format.field == V4L2_FIELD_INTERLACED) |
219 | offset = vip->format.width * 2; |
220 | |
221 | spin_lock_irq(lock: &vip->slock); |
222 | /* Enable acquisition */ |
223 | reg_write(vip, DVP_CTL, val: reg_read(vip, DVP_CTL) | DVP_CTL_ENA); |
224 | /* Set Top and Bottom Field memory address */ |
225 | reg_write(vip, DVP_VTP, val: (u32)vip_buf->dma); |
226 | reg_write(vip, DVP_VBP, val: (u32)vip_buf->dma + offset); |
227 | spin_unlock_irq(lock: &vip->slock); |
228 | } |
229 | |
230 | /* Fetch the next buffer to activate */ |
231 | static void vip_active_buf_next(struct sta2x11_vip *vip) |
232 | { |
233 | /* Get the next buffer */ |
234 | spin_lock(lock: &vip->lock); |
235 | if (list_empty(head: &vip->buffer_list)) {/* No available buffer */ |
236 | spin_unlock(lock: &vip->lock); |
237 | return; |
238 | } |
239 | vip->active = list_first_entry(&vip->buffer_list, |
240 | struct vip_buffer, |
241 | list); |
242 | /* Reset Top and Bottom counter */ |
243 | vip->tcount = 0; |
244 | vip->bcount = 0; |
245 | spin_unlock(lock: &vip->lock); |
246 | if (vb2_is_streaming(q: &vip->vb_vidq)) { /* streaming is on */ |
247 | start_dma(vip, vip_buf: vip->active); /* start dma capture */ |
248 | } |
249 | } |
250 | |
251 | |
252 | /* Videobuf2 Operations */ |
253 | static int queue_setup(struct vb2_queue *vq, |
254 | unsigned int *nbuffers, unsigned int *nplanes, |
255 | unsigned int sizes[], struct device *alloc_devs[]) |
256 | { |
257 | struct sta2x11_vip *vip = vb2_get_drv_priv(q: vq); |
258 | |
259 | if (!(*nbuffers) || *nbuffers < MAX_FRAMES) |
260 | *nbuffers = MAX_FRAMES; |
261 | |
262 | *nplanes = 1; |
263 | sizes[0] = vip->format.sizeimage; |
264 | |
265 | vip->sequence = 0; |
266 | vip->active = NULL; |
267 | vip->tcount = 0; |
268 | vip->bcount = 0; |
269 | |
270 | return 0; |
271 | }; |
272 | static int buffer_init(struct vb2_buffer *vb) |
273 | { |
274 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
275 | struct vip_buffer *vip_buf = to_vip_buffer(vb2: vbuf); |
276 | |
277 | vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, plane_no: 0); |
278 | INIT_LIST_HEAD(list: &vip_buf->list); |
279 | return 0; |
280 | } |
281 | |
282 | static int buffer_prepare(struct vb2_buffer *vb) |
283 | { |
284 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
285 | struct sta2x11_vip *vip = vb2_get_drv_priv(q: vb->vb2_queue); |
286 | struct vip_buffer *vip_buf = to_vip_buffer(vb2: vbuf); |
287 | unsigned long size; |
288 | |
289 | size = vip->format.sizeimage; |
290 | if (vb2_plane_size(vb, plane_no: 0) < size) { |
291 | v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n" , |
292 | vb2_plane_size(vb, 0), size); |
293 | return -EINVAL; |
294 | } |
295 | |
296 | vb2_set_plane_payload(vb: &vip_buf->vb.vb2_buf, plane_no: 0, size); |
297 | |
298 | return 0; |
299 | } |
300 | static void buffer_queue(struct vb2_buffer *vb) |
301 | { |
302 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
303 | struct sta2x11_vip *vip = vb2_get_drv_priv(q: vb->vb2_queue); |
304 | struct vip_buffer *vip_buf = to_vip_buffer(vb2: vbuf); |
305 | |
306 | spin_lock(lock: &vip->lock); |
307 | list_add_tail(new: &vip_buf->list, head: &vip->buffer_list); |
308 | if (!vip->active) { /* No active buffer, active the first one */ |
309 | vip->active = list_first_entry(&vip->buffer_list, |
310 | struct vip_buffer, |
311 | list); |
312 | if (vb2_is_streaming(q: &vip->vb_vidq)) /* streaming is on */ |
313 | start_dma(vip, vip_buf); /* start dma capture */ |
314 | } |
315 | spin_unlock(lock: &vip->lock); |
316 | } |
317 | static void buffer_finish(struct vb2_buffer *vb) |
318 | { |
319 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
320 | struct sta2x11_vip *vip = vb2_get_drv_priv(q: vb->vb2_queue); |
321 | struct vip_buffer *vip_buf = to_vip_buffer(vb2: vbuf); |
322 | |
323 | /* Buffer handled, remove it from the list */ |
324 | spin_lock(lock: &vip->lock); |
325 | list_del_init(entry: &vip_buf->list); |
326 | spin_unlock(lock: &vip->lock); |
327 | |
328 | if (vb2_is_streaming(q: vb->vb2_queue)) |
329 | vip_active_buf_next(vip); |
330 | } |
331 | |
332 | static int start_streaming(struct vb2_queue *vq, unsigned int count) |
333 | { |
334 | struct sta2x11_vip *vip = vb2_get_drv_priv(q: vq); |
335 | |
336 | spin_lock_irq(lock: &vip->slock); |
337 | /* Enable interrupt VSYNC Top and Bottom*/ |
338 | reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); |
339 | spin_unlock_irq(lock: &vip->slock); |
340 | |
341 | if (count) |
342 | start_dma(vip, vip_buf: vip->active); |
343 | |
344 | return 0; |
345 | } |
346 | |
347 | /* abort streaming and wait for last buffer */ |
348 | static void stop_streaming(struct vb2_queue *vq) |
349 | { |
350 | struct sta2x11_vip *vip = vb2_get_drv_priv(q: vq); |
351 | struct vip_buffer *vip_buf, *node; |
352 | |
353 | /* Disable acquisition */ |
354 | reg_write(vip, DVP_CTL, val: reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); |
355 | /* Disable all interrupts */ |
356 | reg_write(vip, DVP_ITM, val: 0); |
357 | |
358 | /* Release all active buffers */ |
359 | spin_lock(lock: &vip->lock); |
360 | list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { |
361 | vb2_buffer_done(vb: &vip_buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR); |
362 | list_del(entry: &vip_buf->list); |
363 | } |
364 | spin_unlock(lock: &vip->lock); |
365 | } |
366 | |
367 | static const struct vb2_ops vip_video_qops = { |
368 | .queue_setup = queue_setup, |
369 | .buf_init = buffer_init, |
370 | .buf_prepare = buffer_prepare, |
371 | .buf_finish = buffer_finish, |
372 | .buf_queue = buffer_queue, |
373 | .start_streaming = start_streaming, |
374 | .stop_streaming = stop_streaming, |
375 | .wait_prepare = vb2_ops_wait_prepare, |
376 | .wait_finish = vb2_ops_wait_finish, |
377 | }; |
378 | |
379 | |
380 | /* File Operations */ |
381 | static const struct v4l2_file_operations vip_fops = { |
382 | .owner = THIS_MODULE, |
383 | .open = v4l2_fh_open, |
384 | .release = vb2_fop_release, |
385 | .unlocked_ioctl = video_ioctl2, |
386 | .read = vb2_fop_read, |
387 | .mmap = vb2_fop_mmap, |
388 | .poll = vb2_fop_poll |
389 | }; |
390 | |
391 | |
392 | /** |
393 | * vidioc_querycap - return capabilities of device |
394 | * @file: descriptor of device |
395 | * @cap: contains return values |
396 | * @priv: unused |
397 | * |
398 | * the capabilities of the device are returned |
399 | * |
400 | * return value: 0, no error. |
401 | */ |
402 | static int vidioc_querycap(struct file *file, void *priv, |
403 | struct v4l2_capability *cap) |
404 | { |
405 | strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); |
406 | strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); |
407 | return 0; |
408 | } |
409 | |
410 | /** |
411 | * vidioc_s_std - set video standard |
412 | * @file: descriptor of device |
413 | * @std: contains standard to be set |
414 | * @priv: unused |
415 | * |
416 | * the video standard is set |
417 | * |
418 | * return value: 0, no error. |
419 | * |
420 | * -EIO, no input signal detected |
421 | * |
422 | * other, returned from video DAC. |
423 | */ |
424 | static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) |
425 | { |
426 | struct sta2x11_vip *vip = video_drvdata(file); |
427 | |
428 | /* |
429 | * This is here for backwards compatibility only. |
430 | * The use of V4L2_STD_ALL to trigger a querystd is non-standard. |
431 | */ |
432 | if (std == V4L2_STD_ALL) { |
433 | v4l2_subdev_call(vip->decoder, video, querystd, &std); |
434 | if (std == V4L2_STD_UNKNOWN) |
435 | return -EIO; |
436 | } |
437 | |
438 | if (vip->std != std) { |
439 | vip->std = std; |
440 | if (V4L2_STD_525_60 & std) |
441 | vip->format = formats_60[0]; |
442 | else |
443 | vip->format = formats_50[0]; |
444 | } |
445 | |
446 | return v4l2_subdev_call(vip->decoder, video, s_std, std); |
447 | } |
448 | |
449 | /** |
450 | * vidioc_g_std - get video standard |
451 | * @file: descriptor of device |
452 | * @priv: unused |
453 | * @std: contains return values |
454 | * |
455 | * the current video standard is returned |
456 | * |
457 | * return value: 0, no error. |
458 | */ |
459 | static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) |
460 | { |
461 | struct sta2x11_vip *vip = video_drvdata(file); |
462 | |
463 | *std = vip->std; |
464 | return 0; |
465 | } |
466 | |
467 | /** |
468 | * vidioc_querystd - get possible video standards |
469 | * @file: descriptor of device |
470 | * @priv: unused |
471 | * @std: contains return values |
472 | * |
473 | * all possible video standards are returned |
474 | * |
475 | * return value: delivered by video DAC routine. |
476 | */ |
477 | static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) |
478 | { |
479 | struct sta2x11_vip *vip = video_drvdata(file); |
480 | |
481 | return v4l2_subdev_call(vip->decoder, video, querystd, std); |
482 | } |
483 | |
484 | static int vidioc_enum_input(struct file *file, void *priv, |
485 | struct v4l2_input *inp) |
486 | { |
487 | if (inp->index > 1) |
488 | return -EINVAL; |
489 | |
490 | inp->type = V4L2_INPUT_TYPE_CAMERA; |
491 | inp->std = V4L2_STD_ALL; |
492 | sprintf(buf: inp->name, fmt: "Camera %u" , inp->index); |
493 | |
494 | return 0; |
495 | } |
496 | |
497 | /** |
498 | * vidioc_s_input - set input line |
499 | * @file: descriptor of device |
500 | * @priv: unused |
501 | * @i: new input line number |
502 | * |
503 | * the current active input line is set |
504 | * |
505 | * return value: 0, no error. |
506 | * |
507 | * -EINVAL, line number out of range |
508 | */ |
509 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
510 | { |
511 | struct sta2x11_vip *vip = video_drvdata(file); |
512 | int ret; |
513 | |
514 | if (i > 1) |
515 | return -EINVAL; |
516 | ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); |
517 | |
518 | if (!ret) |
519 | vip->input = i; |
520 | |
521 | return 0; |
522 | } |
523 | |
524 | /** |
525 | * vidioc_g_input - return input line |
526 | * @file: descriptor of device |
527 | * @priv: unused |
528 | * @i: returned input line number |
529 | * |
530 | * the current active input line is returned |
531 | * |
532 | * return value: always 0. |
533 | */ |
534 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
535 | { |
536 | struct sta2x11_vip *vip = video_drvdata(file); |
537 | |
538 | *i = vip->input; |
539 | return 0; |
540 | } |
541 | |
542 | /** |
543 | * vidioc_enum_fmt_vid_cap - return video capture format |
544 | * @file: descriptor of device |
545 | * @priv: unused |
546 | * @f: returned format information |
547 | * |
548 | * returns name and format of video capture |
549 | * Only UYVY is supported by hardware. |
550 | * |
551 | * return value: always 0. |
552 | */ |
553 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
554 | struct v4l2_fmtdesc *f) |
555 | { |
556 | |
557 | if (f->index != 0) |
558 | return -EINVAL; |
559 | |
560 | f->pixelformat = V4L2_PIX_FMT_UYVY; |
561 | return 0; |
562 | } |
563 | |
564 | /** |
565 | * vidioc_try_fmt_vid_cap - set video capture format |
566 | * @file: descriptor of device |
567 | * @priv: unused |
568 | * @f: new format |
569 | * |
570 | * new video format is set which includes width and |
571 | * field type. width is fixed to 720, no scaling. |
572 | * Only UYVY is supported by this hardware. |
573 | * the minimum height is 200, the maximum is 576 (PAL) |
574 | * |
575 | * return value: 0, no error |
576 | * |
577 | * -EINVAL, pixel or field format not supported |
578 | * |
579 | */ |
580 | static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, |
581 | struct v4l2_format *f) |
582 | { |
583 | struct sta2x11_vip *vip = video_drvdata(file); |
584 | int interlace_lim; |
585 | |
586 | if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { |
587 | v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n" ); |
588 | return -EINVAL; |
589 | } |
590 | |
591 | if (V4L2_STD_525_60 & vip->std) |
592 | interlace_lim = 240; |
593 | else |
594 | interlace_lim = 288; |
595 | |
596 | switch (f->fmt.pix.field) { |
597 | default: |
598 | case V4L2_FIELD_ANY: |
599 | if (interlace_lim < f->fmt.pix.height) |
600 | f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
601 | else |
602 | f->fmt.pix.field = V4L2_FIELD_BOTTOM; |
603 | break; |
604 | case V4L2_FIELD_TOP: |
605 | case V4L2_FIELD_BOTTOM: |
606 | if (interlace_lim < f->fmt.pix.height) |
607 | f->fmt.pix.height = interlace_lim; |
608 | break; |
609 | case V4L2_FIELD_INTERLACED: |
610 | break; |
611 | } |
612 | |
613 | /* It is the only supported format */ |
614 | f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; |
615 | f->fmt.pix.height &= ~1; |
616 | if (2 * interlace_lim < f->fmt.pix.height) |
617 | f->fmt.pix.height = 2 * interlace_lim; |
618 | if (200 > f->fmt.pix.height) |
619 | f->fmt.pix.height = 200; |
620 | f->fmt.pix.width = 720; |
621 | f->fmt.pix.bytesperline = f->fmt.pix.width * 2; |
622 | f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; |
623 | f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
624 | return 0; |
625 | } |
626 | |
627 | /** |
628 | * vidioc_s_fmt_vid_cap - set current video format parameters |
629 | * @file: descriptor of device |
630 | * @priv: unused |
631 | * @f: returned format information |
632 | * |
633 | * set new capture format |
634 | * return value: 0, no error |
635 | * |
636 | * other, delivered by video DAC routine. |
637 | */ |
638 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
639 | struct v4l2_format *f) |
640 | { |
641 | struct sta2x11_vip *vip = video_drvdata(file); |
642 | unsigned int t_stop, b_stop, pitch; |
643 | int ret; |
644 | |
645 | ret = vidioc_try_fmt_vid_cap(file, priv, f); |
646 | if (ret) |
647 | return ret; |
648 | |
649 | if (vb2_is_busy(q: &vip->vb_vidq)) { |
650 | /* Can't change format during acquisition */ |
651 | v4l2_err(&vip->v4l2_dev, "device busy\n" ); |
652 | return -EBUSY; |
653 | } |
654 | vip->format = f->fmt.pix; |
655 | switch (vip->format.field) { |
656 | case V4L2_FIELD_INTERLACED: |
657 | t_stop = ((vip->format.height / 2 - 1) << 16) | |
658 | (2 * vip->format.width - 1); |
659 | b_stop = t_stop; |
660 | pitch = 4 * vip->format.width; |
661 | break; |
662 | case V4L2_FIELD_TOP: |
663 | t_stop = ((vip->format.height - 1) << 16) | |
664 | (2 * vip->format.width - 1); |
665 | b_stop = (0 << 16) | (2 * vip->format.width - 1); |
666 | pitch = 2 * vip->format.width; |
667 | break; |
668 | case V4L2_FIELD_BOTTOM: |
669 | t_stop = (0 << 16) | (2 * vip->format.width - 1); |
670 | b_stop = (vip->format.height << 16) | |
671 | (2 * vip->format.width - 1); |
672 | pitch = 2 * vip->format.width; |
673 | break; |
674 | default: |
675 | v4l2_err(&vip->v4l2_dev, "unknown field format\n" ); |
676 | return -EINVAL; |
677 | } |
678 | |
679 | spin_lock_irq(lock: &vip->slock); |
680 | /* Y-X Top Field Offset */ |
681 | reg_write(vip, DVP_TFO, val: 0); |
682 | /* Y-X Bottom Field Offset */ |
683 | reg_write(vip, DVP_BFO, val: 0); |
684 | /* Y-X Top Field Stop*/ |
685 | reg_write(vip, DVP_TFS, val: t_stop); |
686 | /* Y-X Bottom Field Stop */ |
687 | reg_write(vip, DVP_BFS, val: b_stop); |
688 | /* Video Memory Pitch */ |
689 | reg_write(vip, DVP_VMP, val: pitch); |
690 | spin_unlock_irq(lock: &vip->slock); |
691 | |
692 | return 0; |
693 | } |
694 | |
695 | /** |
696 | * vidioc_g_fmt_vid_cap - get current video format parameters |
697 | * @file: descriptor of device |
698 | * @priv: unused |
699 | * @f: contains format information |
700 | * |
701 | * returns current video format parameters |
702 | * |
703 | * return value: 0, always successful |
704 | */ |
705 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
706 | struct v4l2_format *f) |
707 | { |
708 | struct sta2x11_vip *vip = video_drvdata(file); |
709 | |
710 | f->fmt.pix = vip->format; |
711 | |
712 | return 0; |
713 | } |
714 | |
715 | static const struct v4l2_ioctl_ops vip_ioctl_ops = { |
716 | .vidioc_querycap = vidioc_querycap, |
717 | /* FMT handling */ |
718 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
719 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
720 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
721 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
722 | /* Buffer handlers */ |
723 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
724 | .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
725 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
726 | .vidioc_querybuf = vb2_ioctl_querybuf, |
727 | .vidioc_qbuf = vb2_ioctl_qbuf, |
728 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
729 | /* Stream on/off */ |
730 | .vidioc_streamon = vb2_ioctl_streamon, |
731 | .vidioc_streamoff = vb2_ioctl_streamoff, |
732 | /* Standard handling */ |
733 | .vidioc_g_std = vidioc_g_std, |
734 | .vidioc_s_std = vidioc_s_std, |
735 | .vidioc_querystd = vidioc_querystd, |
736 | /* Input handling */ |
737 | .vidioc_enum_input = vidioc_enum_input, |
738 | .vidioc_g_input = vidioc_g_input, |
739 | .vidioc_s_input = vidioc_s_input, |
740 | /* Log status ioctl */ |
741 | .vidioc_log_status = v4l2_ctrl_log_status, |
742 | /* Event handling */ |
743 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
744 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
745 | }; |
746 | |
747 | static const struct video_device video_dev_template = { |
748 | .name = KBUILD_MODNAME, |
749 | .release = video_device_release_empty, |
750 | .fops = &vip_fops, |
751 | .ioctl_ops = &vip_ioctl_ops, |
752 | .tvnorms = V4L2_STD_ALL, |
753 | .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
754 | V4L2_CAP_STREAMING, |
755 | }; |
756 | |
757 | /** |
758 | * vip_irq - interrupt routine |
759 | * @irq: Number of interrupt ( not used, correct number is assumed ) |
760 | * @data: local data structure containing all information |
761 | * |
762 | * check for both frame interrupts set ( top and bottom ). |
763 | * check FIFO overflow, but limit number of log messages after open. |
764 | * signal a complete buffer if done |
765 | * |
766 | * return value: IRQ_NONE, interrupt was not generated by VIP |
767 | * |
768 | * IRQ_HANDLED, interrupt done. |
769 | */ |
770 | static irqreturn_t vip_irq(int irq, void *data) |
771 | { |
772 | struct sta2x11_vip *vip = data; |
773 | unsigned int status; |
774 | |
775 | status = reg_read(vip, DVP_ITS); |
776 | |
777 | if (!status) /* No interrupt to handle */ |
778 | return IRQ_NONE; |
779 | |
780 | if (status & DVP_IT_FIFO) |
781 | if (vip->overflow++ > 5) |
782 | pr_info("VIP: fifo overflow\n" ); |
783 | |
784 | if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { |
785 | /* this is bad, we are too slow, hope the condition is gone |
786 | * on the next frame */ |
787 | return IRQ_HANDLED; |
788 | } |
789 | |
790 | if (status & DVP_IT_VST) |
791 | if ((++vip->tcount) < 2) |
792 | return IRQ_HANDLED; |
793 | if (status & DVP_IT_VSB) { |
794 | vip->bcount++; |
795 | return IRQ_HANDLED; |
796 | } |
797 | |
798 | if (vip->active) { /* Acquisition is over on this buffer */ |
799 | /* Disable acquisition */ |
800 | reg_write(vip, DVP_CTL, val: reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); |
801 | /* Remove the active buffer from the list */ |
802 | vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); |
803 | vip->active->vb.sequence = vip->sequence++; |
804 | vb2_buffer_done(vb: &vip->active->vb.vb2_buf, state: VB2_BUF_STATE_DONE); |
805 | } |
806 | |
807 | return IRQ_HANDLED; |
808 | } |
809 | |
810 | static void sta2x11_vip_init_register(struct sta2x11_vip *vip) |
811 | { |
812 | /* Register initialization */ |
813 | spin_lock_irq(lock: &vip->slock); |
814 | /* Clean interrupt */ |
815 | reg_read(vip, DVP_ITS); |
816 | /* Enable Half Line per vertical */ |
817 | reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); |
818 | /* Reset VIP control */ |
819 | reg_write(vip, DVP_CTL, DVP_CTL_RST); |
820 | /* Clear VIP control */ |
821 | reg_write(vip, DVP_CTL, val: 0); |
822 | spin_unlock_irq(lock: &vip->slock); |
823 | } |
824 | static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) |
825 | { |
826 | spin_lock_irq(lock: &vip->slock); |
827 | /* Disable interrupt */ |
828 | reg_write(vip, DVP_ITM, val: 0); |
829 | /* Reset VIP Control */ |
830 | reg_write(vip, DVP_CTL, DVP_CTL_RST); |
831 | /* Clear VIP Control */ |
832 | reg_write(vip, DVP_CTL, val: 0); |
833 | /* Clean VIP Interrupt */ |
834 | reg_read(vip, DVP_ITS); |
835 | spin_unlock_irq(lock: &vip->slock); |
836 | } |
837 | static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) |
838 | { |
839 | int err; |
840 | |
841 | err = dma_set_coherent_mask(dev: &vip->pdev->dev, DMA_BIT_MASK(29)); |
842 | if (err) { |
843 | v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask" ); |
844 | return err; |
845 | } |
846 | memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); |
847 | vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
848 | vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; |
849 | vip->vb_vidq.drv_priv = vip; |
850 | vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); |
851 | vip->vb_vidq.ops = &vip_video_qops; |
852 | vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; |
853 | vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
854 | vip->vb_vidq.dev = &vip->pdev->dev; |
855 | vip->vb_vidq.lock = &vip->v4l_lock; |
856 | err = vb2_queue_init(q: &vip->vb_vidq); |
857 | if (err) |
858 | return err; |
859 | INIT_LIST_HEAD(list: &vip->buffer_list); |
860 | spin_lock_init(&vip->lock); |
861 | return 0; |
862 | } |
863 | |
864 | static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) |
865 | { |
866 | /* |
867 | * Inititialize an empty control so VIP can inerithing controls |
868 | * from ADV7180 |
869 | */ |
870 | v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); |
871 | |
872 | vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; |
873 | if (vip->ctrl_hdl.error) { |
874 | int err = vip->ctrl_hdl.error; |
875 | |
876 | v4l2_ctrl_handler_free(hdl: &vip->ctrl_hdl); |
877 | return err; |
878 | } |
879 | |
880 | return 0; |
881 | } |
882 | |
883 | /** |
884 | * vip_gpio_reserve - reserve gpio pin |
885 | * @dev: device |
886 | * @pin: GPIO pin number |
887 | * @dir: direction, input or output |
888 | * @name: GPIO pin name |
889 | * |
890 | */ |
891 | static int vip_gpio_reserve(struct device *dev, int pin, int dir, |
892 | const char *name) |
893 | { |
894 | struct gpio_desc *desc = gpio_to_desc(gpio: pin); |
895 | int ret = -ENODEV; |
896 | |
897 | if (!gpio_is_valid(number: pin)) |
898 | return ret; |
899 | |
900 | ret = gpio_request(gpio: pin, label: name); |
901 | if (ret) { |
902 | dev_err(dev, "Failed to allocate pin %d (%s)\n" , pin, name); |
903 | return ret; |
904 | } |
905 | |
906 | ret = gpiod_direction_output(desc, value: dir); |
907 | if (ret) { |
908 | dev_err(dev, "Failed to set direction for pin %d (%s)\n" , |
909 | pin, name); |
910 | gpio_free(gpio: pin); |
911 | return ret; |
912 | } |
913 | |
914 | ret = gpiod_export(desc, direction_may_change: false); |
915 | if (ret) { |
916 | dev_err(dev, "Failed to export pin %d (%s)\n" , pin, name); |
917 | gpio_free(gpio: pin); |
918 | return ret; |
919 | } |
920 | |
921 | return 0; |
922 | } |
923 | |
924 | /** |
925 | * vip_gpio_release - release gpio pin |
926 | * @dev: device |
927 | * @pin: GPIO pin number |
928 | * @name: GPIO pin name |
929 | * |
930 | */ |
931 | static void vip_gpio_release(struct device *dev, int pin, const char *name) |
932 | { |
933 | if (gpio_is_valid(number: pin)) { |
934 | struct gpio_desc *desc = gpio_to_desc(gpio: pin); |
935 | |
936 | dev_dbg(dev, "releasing pin %d (%s)\n" , pin, name); |
937 | gpiod_unexport(desc); |
938 | gpio_free(gpio: pin); |
939 | } |
940 | } |
941 | |
942 | /** |
943 | * sta2x11_vip_init_one - init one instance of video device |
944 | * @pdev: PCI device |
945 | * @ent: (not used) |
946 | * |
947 | * allocate reset pins for DAC. |
948 | * Reset video DAC, this is done via reset line. |
949 | * allocate memory for managing device |
950 | * request interrupt |
951 | * map IO region |
952 | * register device |
953 | * find and initialize video DAC |
954 | * |
955 | * return value: 0, no error |
956 | * |
957 | * -ENOMEM, no memory |
958 | * |
959 | * -ENODEV, device could not be detected or registered |
960 | */ |
961 | static int sta2x11_vip_init_one(struct pci_dev *pdev, |
962 | const struct pci_device_id *ent) |
963 | { |
964 | int ret; |
965 | struct sta2x11_vip *vip; |
966 | struct vip_config *config; |
967 | |
968 | /* Check if hardware support 26-bit DMA */ |
969 | if (dma_set_mask(dev: &pdev->dev, DMA_BIT_MASK(26))) { |
970 | dev_err(&pdev->dev, "26-bit DMA addressing not available\n" ); |
971 | return -EINVAL; |
972 | } |
973 | /* Enable PCI */ |
974 | ret = pci_enable_device(dev: pdev); |
975 | if (ret) |
976 | return ret; |
977 | |
978 | /* Get VIP platform data */ |
979 | config = dev_get_platdata(dev: &pdev->dev); |
980 | if (!config) { |
981 | dev_info(&pdev->dev, "VIP slot disabled\n" ); |
982 | ret = -EINVAL; |
983 | goto disable; |
984 | } |
985 | |
986 | /* Power configuration */ |
987 | ret = vip_gpio_reserve(dev: &pdev->dev, pin: config->pwr_pin, dir: 0, |
988 | name: config->pwr_name); |
989 | if (ret) |
990 | goto disable; |
991 | |
992 | ret = vip_gpio_reserve(dev: &pdev->dev, pin: config->reset_pin, dir: 0, |
993 | name: config->reset_name); |
994 | if (ret) { |
995 | vip_gpio_release(dev: &pdev->dev, pin: config->pwr_pin, |
996 | name: config->pwr_name); |
997 | goto disable; |
998 | } |
999 | |
1000 | if (gpio_is_valid(number: config->pwr_pin)) { |
1001 | /* Datasheet says 5ms between PWR and RST */ |
1002 | usleep_range(min: 5000, max: 25000); |
1003 | gpio_direction_output(gpio: config->pwr_pin, value: 1); |
1004 | } |
1005 | |
1006 | if (gpio_is_valid(number: config->reset_pin)) { |
1007 | /* Datasheet says 5ms between PWR and RST */ |
1008 | usleep_range(min: 5000, max: 25000); |
1009 | gpio_direction_output(gpio: config->reset_pin, value: 1); |
1010 | } |
1011 | usleep_range(min: 5000, max: 25000); |
1012 | |
1013 | /* Allocate a new VIP instance */ |
1014 | vip = kzalloc(size: sizeof(struct sta2x11_vip), GFP_KERNEL); |
1015 | if (!vip) { |
1016 | ret = -ENOMEM; |
1017 | goto release_gpios; |
1018 | } |
1019 | vip->pdev = pdev; |
1020 | vip->std = V4L2_STD_PAL; |
1021 | vip->format = formats_50[0]; |
1022 | vip->config = config; |
1023 | mutex_init(&vip->v4l_lock); |
1024 | |
1025 | ret = sta2x11_vip_init_controls(vip); |
1026 | if (ret) |
1027 | goto free_mem; |
1028 | ret = v4l2_device_register(dev: &pdev->dev, v4l2_dev: &vip->v4l2_dev); |
1029 | if (ret) |
1030 | goto free_mem; |
1031 | |
1032 | dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n" , |
1033 | (unsigned long)pci_resource_start(pdev, 0), |
1034 | (unsigned long)pci_resource_len(pdev, 0), pdev->irq); |
1035 | |
1036 | pci_set_master(dev: pdev); |
1037 | |
1038 | ret = pci_request_regions(pdev, KBUILD_MODNAME); |
1039 | if (ret) |
1040 | goto unreg; |
1041 | |
1042 | vip->iomem = pci_iomap(dev: pdev, bar: 0, max: 0x100); |
1043 | if (!vip->iomem) { |
1044 | ret = -ENOMEM; |
1045 | goto release; |
1046 | } |
1047 | |
1048 | pci_enable_msi(dev: pdev); |
1049 | |
1050 | /* Initialize buffer */ |
1051 | ret = sta2x11_vip_init_buffer(vip); |
1052 | if (ret) |
1053 | goto unmap; |
1054 | |
1055 | spin_lock_init(&vip->slock); |
1056 | |
1057 | ret = request_irq(irq: pdev->irq, handler: vip_irq, IRQF_SHARED, KBUILD_MODNAME, dev: vip); |
1058 | if (ret) { |
1059 | dev_err(&pdev->dev, "request_irq failed\n" ); |
1060 | ret = -ENODEV; |
1061 | goto release_buf; |
1062 | } |
1063 | |
1064 | /* Initialize and register video device */ |
1065 | vip->video_dev = video_dev_template; |
1066 | vip->video_dev.v4l2_dev = &vip->v4l2_dev; |
1067 | vip->video_dev.queue = &vip->vb_vidq; |
1068 | vip->video_dev.lock = &vip->v4l_lock; |
1069 | video_set_drvdata(vdev: &vip->video_dev, data: vip); |
1070 | |
1071 | ret = video_register_device(vdev: &vip->video_dev, type: VFL_TYPE_VIDEO, nr: -1); |
1072 | if (ret) |
1073 | goto vrelease; |
1074 | |
1075 | /* Get ADV7180 subdevice */ |
1076 | vip->adapter = i2c_get_adapter(nr: vip->config->i2c_id); |
1077 | if (!vip->adapter) { |
1078 | ret = -ENODEV; |
1079 | dev_err(&pdev->dev, "no I2C adapter found\n" ); |
1080 | goto vunreg; |
1081 | } |
1082 | |
1083 | vip->decoder = v4l2_i2c_new_subdev(v4l2_dev: &vip->v4l2_dev, adapter: vip->adapter, |
1084 | client_type: "adv7180" , addr: vip->config->i2c_addr, |
1085 | NULL); |
1086 | if (!vip->decoder) { |
1087 | ret = -ENODEV; |
1088 | dev_err(&pdev->dev, "no decoder found\n" ); |
1089 | goto vunreg; |
1090 | } |
1091 | |
1092 | i2c_put_adapter(adap: vip->adapter); |
1093 | v4l2_subdev_call(vip->decoder, core, init, 0); |
1094 | |
1095 | sta2x11_vip_init_register(vip); |
1096 | |
1097 | dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n" ); |
1098 | return 0; |
1099 | |
1100 | vunreg: |
1101 | video_set_drvdata(vdev: &vip->video_dev, NULL); |
1102 | vrelease: |
1103 | vb2_video_unregister_device(vdev: &vip->video_dev); |
1104 | free_irq(pdev->irq, vip); |
1105 | release_buf: |
1106 | pci_disable_msi(dev: pdev); |
1107 | unmap: |
1108 | pci_iounmap(dev: pdev, vip->iomem); |
1109 | release: |
1110 | pci_release_regions(pdev); |
1111 | unreg: |
1112 | v4l2_device_unregister(v4l2_dev: &vip->v4l2_dev); |
1113 | free_mem: |
1114 | kfree(objp: vip); |
1115 | release_gpios: |
1116 | vip_gpio_release(dev: &pdev->dev, pin: config->reset_pin, name: config->reset_name); |
1117 | vip_gpio_release(dev: &pdev->dev, pin: config->pwr_pin, name: config->pwr_name); |
1118 | disable: |
1119 | /* |
1120 | * do not call pci_disable_device on sta2x11 because it break all |
1121 | * other Bus masters on this EP |
1122 | */ |
1123 | return ret; |
1124 | } |
1125 | |
1126 | /** |
1127 | * sta2x11_vip_remove_one - release device |
1128 | * @pdev: PCI device |
1129 | * |
1130 | * Undo everything done in .._init_one |
1131 | * |
1132 | * unregister video device |
1133 | * free interrupt |
1134 | * unmap ioadresses |
1135 | * free memory |
1136 | * free GPIO pins |
1137 | */ |
1138 | static void sta2x11_vip_remove_one(struct pci_dev *pdev) |
1139 | { |
1140 | struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); |
1141 | struct sta2x11_vip *vip = |
1142 | container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); |
1143 | |
1144 | sta2x11_vip_clear_register(vip); |
1145 | |
1146 | video_set_drvdata(vdev: &vip->video_dev, NULL); |
1147 | vb2_video_unregister_device(vdev: &vip->video_dev); |
1148 | free_irq(pdev->irq, vip); |
1149 | pci_disable_msi(dev: pdev); |
1150 | pci_iounmap(dev: pdev, vip->iomem); |
1151 | pci_release_regions(pdev); |
1152 | |
1153 | v4l2_device_unregister(v4l2_dev: &vip->v4l2_dev); |
1154 | |
1155 | vip_gpio_release(dev: &pdev->dev, pin: vip->config->pwr_pin, |
1156 | name: vip->config->pwr_name); |
1157 | vip_gpio_release(dev: &pdev->dev, pin: vip->config->reset_pin, |
1158 | name: vip->config->reset_name); |
1159 | |
1160 | kfree(objp: vip); |
1161 | /* |
1162 | * do not call pci_disable_device on sta2x11 because it break all |
1163 | * other Bus masters on this EP |
1164 | */ |
1165 | } |
1166 | |
1167 | /** |
1168 | * sta2x11_vip_suspend - set device into power save mode |
1169 | * @dev_d: PCI device |
1170 | * |
1171 | * all relevant registers are saved and an attempt to set a new state is made. |
1172 | * |
1173 | * return value: 0 always indicate success, |
1174 | * even if device could not be disabled. (workaround for hardware problem) |
1175 | */ |
1176 | static int __maybe_unused sta2x11_vip_suspend(struct device *dev_d) |
1177 | { |
1178 | struct v4l2_device *v4l2_dev = dev_get_drvdata(dev: dev_d); |
1179 | struct sta2x11_vip *vip = |
1180 | container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); |
1181 | unsigned long flags; |
1182 | int i; |
1183 | |
1184 | spin_lock_irqsave(&vip->slock, flags); |
1185 | vip->register_save_area[0] = reg_read(vip, DVP_CTL); |
1186 | reg_write(vip, DVP_CTL, val: vip->register_save_area[0] & DVP_CTL_DIS); |
1187 | vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); |
1188 | reg_write(vip, DVP_ITM, val: 0); |
1189 | for (i = 1; i < SAVE_COUNT; i++) |
1190 | vip->register_save_area[i] = reg_read(vip, reg: 4 * i); |
1191 | for (i = 0; i < AUX_COUNT; i++) |
1192 | vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = |
1193 | reg_read(vip, reg: registers_to_save[i]); |
1194 | spin_unlock_irqrestore(lock: &vip->slock, flags); |
1195 | |
1196 | vip->disabled = 1; |
1197 | |
1198 | pr_info("VIP: suspend\n" ); |
1199 | return 0; |
1200 | } |
1201 | |
1202 | /** |
1203 | * sta2x11_vip_resume - resume device operation |
1204 | * @dev_d : PCI device |
1205 | * |
1206 | * return value: 0, no error. |
1207 | * |
1208 | * other, could not set device to power on state. |
1209 | */ |
1210 | static int __maybe_unused sta2x11_vip_resume(struct device *dev_d) |
1211 | { |
1212 | struct v4l2_device *v4l2_dev = dev_get_drvdata(dev: dev_d); |
1213 | struct sta2x11_vip *vip = |
1214 | container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); |
1215 | unsigned long flags; |
1216 | int i; |
1217 | |
1218 | pr_info("VIP: resume\n" ); |
1219 | |
1220 | vip->disabled = 0; |
1221 | |
1222 | spin_lock_irqsave(&vip->slock, flags); |
1223 | for (i = 1; i < SAVE_COUNT; i++) |
1224 | reg_write(vip, reg: 4 * i, val: vip->register_save_area[i]); |
1225 | for (i = 0; i < AUX_COUNT; i++) |
1226 | reg_write(vip, reg: registers_to_save[i], |
1227 | val: vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); |
1228 | reg_write(vip, DVP_CTL, val: vip->register_save_area[0]); |
1229 | reg_write(vip, DVP_ITM, val: vip->register_save_area[SAVE_COUNT]); |
1230 | spin_unlock_irqrestore(lock: &vip->slock, flags); |
1231 | return 0; |
1232 | } |
1233 | |
1234 | static const struct pci_device_id sta2x11_vip_pci_tbl[] = { |
1235 | {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, |
1236 | {0,} |
1237 | }; |
1238 | |
1239 | static SIMPLE_DEV_PM_OPS(sta2x11_vip_pm_ops, |
1240 | sta2x11_vip_suspend, |
1241 | sta2x11_vip_resume); |
1242 | |
1243 | static struct pci_driver sta2x11_vip_driver = { |
1244 | .name = KBUILD_MODNAME, |
1245 | .probe = sta2x11_vip_init_one, |
1246 | .remove = sta2x11_vip_remove_one, |
1247 | .id_table = sta2x11_vip_pci_tbl, |
1248 | .driver.pm = &sta2x11_vip_pm_ops, |
1249 | }; |
1250 | |
1251 | static int __init sta2x11_vip_init_module(void) |
1252 | { |
1253 | return pci_register_driver(&sta2x11_vip_driver); |
1254 | } |
1255 | |
1256 | static void __exit sta2x11_vip_exit_module(void) |
1257 | { |
1258 | pci_unregister_driver(dev: &sta2x11_vip_driver); |
1259 | } |
1260 | |
1261 | #ifdef MODULE |
1262 | module_init(sta2x11_vip_init_module); |
1263 | module_exit(sta2x11_vip_exit_module); |
1264 | #else |
1265 | late_initcall_sync(sta2x11_vip_init_module); |
1266 | #endif |
1267 | |
1268 | MODULE_DESCRIPTION("STA2X11 Video Input Port driver" ); |
1269 | MODULE_AUTHOR("Wind River" ); |
1270 | MODULE_LICENSE("GPL v2" ); |
1271 | MODULE_VERSION(DRV_VERSION); |
1272 | MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl); |
1273 | |