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