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 struct sta2x11_vip *vip = video_drvdata(file);
405
406 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
407 strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card));
408 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
409 pci_name(vip->pdev));
410 return 0;
411 }
412
413 /**
414 * vidioc_s_std - set video standard
415 * @file: descriptor of device
416 * @std: contains standard to be set
417 * @priv: unused
418 *
419 * the video standard is set
420 *
421 * return value: 0, no error.
422 *
423 * -EIO, no input signal detected
424 *
425 * other, returned from video DAC.
426 */
vidioc_s_std(struct file * file,void * priv,v4l2_std_id std)427 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std)
428 {
429 struct sta2x11_vip *vip = video_drvdata(file);
430
431 /*
432 * This is here for backwards compatibility only.
433 * The use of V4L2_STD_ALL to trigger a querystd is non-standard.
434 */
435 if (std == V4L2_STD_ALL) {
436 v4l2_subdev_call(vip->decoder, video, querystd, &std);
437 if (std == V4L2_STD_UNKNOWN)
438 return -EIO;
439 }
440
441 if (vip->std != std) {
442 vip->std = std;
443 if (V4L2_STD_525_60 & std)
444 vip->format = formats_60[0];
445 else
446 vip->format = formats_50[0];
447 }
448
449 return v4l2_subdev_call(vip->decoder, video, s_std, std);
450 }
451
452 /**
453 * vidioc_g_std - get video standard
454 * @file: descriptor of device
455 * @priv: unused
456 * @std: contains return values
457 *
458 * the current video standard is returned
459 *
460 * return value: 0, no error.
461 */
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * std)462 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
463 {
464 struct sta2x11_vip *vip = video_drvdata(file);
465
466 *std = vip->std;
467 return 0;
468 }
469
470 /**
471 * vidioc_querystd - get possible video standards
472 * @file: descriptor of device
473 * @priv: unused
474 * @std: contains return values
475 *
476 * all possible video standards are returned
477 *
478 * return value: delivered by video DAC routine.
479 */
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * std)480 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std)
481 {
482 struct sta2x11_vip *vip = video_drvdata(file);
483
484 return v4l2_subdev_call(vip->decoder, video, querystd, std);
485 }
486
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * inp)487 static int vidioc_enum_input(struct file *file, void *priv,
488 struct v4l2_input *inp)
489 {
490 if (inp->index > 1)
491 return -EINVAL;
492
493 inp->type = V4L2_INPUT_TYPE_CAMERA;
494 inp->std = V4L2_STD_ALL;
495 sprintf(inp->name, "Camera %u", inp->index);
496
497 return 0;
498 }
499
500 /**
501 * vidioc_s_input - set input line
502 * @file: descriptor of device
503 * @priv: unused
504 * @i: new input line number
505 *
506 * the current active input line is set
507 *
508 * return value: 0, no error.
509 *
510 * -EINVAL, line number out of range
511 */
vidioc_s_input(struct file * file,void * priv,unsigned int i)512 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
513 {
514 struct sta2x11_vip *vip = video_drvdata(file);
515 int ret;
516
517 if (i > 1)
518 return -EINVAL;
519 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
520
521 if (!ret)
522 vip->input = i;
523
524 return 0;
525 }
526
527 /**
528 * vidioc_g_input - return input line
529 * @file: descriptor of device
530 * @priv: unused
531 * @i: returned input line number
532 *
533 * the current active input line is returned
534 *
535 * return value: always 0.
536 */
vidioc_g_input(struct file * file,void * priv,unsigned int * i)537 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
538 {
539 struct sta2x11_vip *vip = video_drvdata(file);
540
541 *i = vip->input;
542 return 0;
543 }
544
545 /**
546 * vidioc_enum_fmt_vid_cap - return video capture format
547 * @file: descriptor of device
548 * @priv: unused
549 * @f: returned format information
550 *
551 * returns name and format of video capture
552 * Only UYVY is supported by hardware.
553 *
554 * return value: always 0.
555 */
vidioc_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)556 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
557 struct v4l2_fmtdesc *f)
558 {
559
560 if (f->index != 0)
561 return -EINVAL;
562
563 f->pixelformat = V4L2_PIX_FMT_UYVY;
564 return 0;
565 }
566
567 /**
568 * vidioc_try_fmt_vid_cap - set video capture format
569 * @file: descriptor of device
570 * @priv: unused
571 * @f: new format
572 *
573 * new video format is set which includes width and
574 * field type. width is fixed to 720, no scaling.
575 * Only UYVY is supported by this hardware.
576 * the minimum height is 200, the maximum is 576 (PAL)
577 *
578 * return value: 0, no error
579 *
580 * -EINVAL, pixel or field format not supported
581 *
582 */
vidioc_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)583 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
584 struct v4l2_format *f)
585 {
586 struct sta2x11_vip *vip = video_drvdata(file);
587 int interlace_lim;
588
589 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) {
590 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n");
591 return -EINVAL;
592 }
593
594 if (V4L2_STD_525_60 & vip->std)
595 interlace_lim = 240;
596 else
597 interlace_lim = 288;
598
599 switch (f->fmt.pix.field) {
600 default:
601 case V4L2_FIELD_ANY:
602 if (interlace_lim < f->fmt.pix.height)
603 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
604 else
605 f->fmt.pix.field = V4L2_FIELD_BOTTOM;
606 break;
607 case V4L2_FIELD_TOP:
608 case V4L2_FIELD_BOTTOM:
609 if (interlace_lim < f->fmt.pix.height)
610 f->fmt.pix.height = interlace_lim;
611 break;
612 case V4L2_FIELD_INTERLACED:
613 break;
614 }
615
616 /* It is the only supported format */
617 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
618 f->fmt.pix.height &= ~1;
619 if (2 * interlace_lim < f->fmt.pix.height)
620 f->fmt.pix.height = 2 * interlace_lim;
621 if (200 > f->fmt.pix.height)
622 f->fmt.pix.height = 200;
623 f->fmt.pix.width = 720;
624 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
625 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
626 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
627 return 0;
628 }
629
630 /**
631 * vidioc_s_fmt_vid_cap - set current video format parameters
632 * @file: descriptor of device
633 * @priv: unused
634 * @f: returned format information
635 *
636 * set new capture format
637 * return value: 0, no error
638 *
639 * other, delivered by video DAC routine.
640 */
vidioc_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)641 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
642 struct v4l2_format *f)
643 {
644 struct sta2x11_vip *vip = video_drvdata(file);
645 unsigned int t_stop, b_stop, pitch;
646 int ret;
647
648 ret = vidioc_try_fmt_vid_cap(file, priv, f);
649 if (ret)
650 return ret;
651
652 if (vb2_is_busy(&vip->vb_vidq)) {
653 /* Can't change format during acquisition */
654 v4l2_err(&vip->v4l2_dev, "device busy\n");
655 return -EBUSY;
656 }
657 vip->format = f->fmt.pix;
658 switch (vip->format.field) {
659 case V4L2_FIELD_INTERLACED:
660 t_stop = ((vip->format.height / 2 - 1) << 16) |
661 (2 * vip->format.width - 1);
662 b_stop = t_stop;
663 pitch = 4 * vip->format.width;
664 break;
665 case V4L2_FIELD_TOP:
666 t_stop = ((vip->format.height - 1) << 16) |
667 (2 * vip->format.width - 1);
668 b_stop = (0 << 16) | (2 * vip->format.width - 1);
669 pitch = 2 * vip->format.width;
670 break;
671 case V4L2_FIELD_BOTTOM:
672 t_stop = (0 << 16) | (2 * vip->format.width - 1);
673 b_stop = (vip->format.height << 16) |
674 (2 * vip->format.width - 1);
675 pitch = 2 * vip->format.width;
676 break;
677 default:
678 v4l2_err(&vip->v4l2_dev, "unknown field format\n");
679 return -EINVAL;
680 }
681
682 spin_lock_irq(&vip->slock);
683 /* Y-X Top Field Offset */
684 reg_write(vip, DVP_TFO, 0);
685 /* Y-X Bottom Field Offset */
686 reg_write(vip, DVP_BFO, 0);
687 /* Y-X Top Field Stop*/
688 reg_write(vip, DVP_TFS, t_stop);
689 /* Y-X Bottom Field Stop */
690 reg_write(vip, DVP_BFS, b_stop);
691 /* Video Memory Pitch */
692 reg_write(vip, DVP_VMP, pitch);
693 spin_unlock_irq(&vip->slock);
694
695 return 0;
696 }
697
698 /**
699 * vidioc_g_fmt_vid_cap - get current video format parameters
700 * @file: descriptor of device
701 * @priv: unused
702 * @f: contains format information
703 *
704 * returns current video format parameters
705 *
706 * return value: 0, always successful
707 */
vidioc_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)708 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
709 struct v4l2_format *f)
710 {
711 struct sta2x11_vip *vip = video_drvdata(file);
712
713 f->fmt.pix = vip->format;
714
715 return 0;
716 }
717
718 static const struct v4l2_ioctl_ops vip_ioctl_ops = {
719 .vidioc_querycap = vidioc_querycap,
720 /* FMT handling */
721 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
722 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
723 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
724 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
725 /* Buffer handlers */
726 .vidioc_create_bufs = vb2_ioctl_create_bufs,
727 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
728 .vidioc_reqbufs = vb2_ioctl_reqbufs,
729 .vidioc_querybuf = vb2_ioctl_querybuf,
730 .vidioc_qbuf = vb2_ioctl_qbuf,
731 .vidioc_dqbuf = vb2_ioctl_dqbuf,
732 /* Stream on/off */
733 .vidioc_streamon = vb2_ioctl_streamon,
734 .vidioc_streamoff = vb2_ioctl_streamoff,
735 /* Standard handling */
736 .vidioc_g_std = vidioc_g_std,
737 .vidioc_s_std = vidioc_s_std,
738 .vidioc_querystd = vidioc_querystd,
739 /* Input handling */
740 .vidioc_enum_input = vidioc_enum_input,
741 .vidioc_g_input = vidioc_g_input,
742 .vidioc_s_input = vidioc_s_input,
743 /* Log status ioctl */
744 .vidioc_log_status = v4l2_ctrl_log_status,
745 /* Event handling */
746 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
747 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
748 };
749
750 static const struct video_device video_dev_template = {
751 .name = KBUILD_MODNAME,
752 .release = video_device_release_empty,
753 .fops = &vip_fops,
754 .ioctl_ops = &vip_ioctl_ops,
755 .tvnorms = V4L2_STD_ALL,
756 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
757 V4L2_CAP_STREAMING,
758 };
759
760 /**
761 * vip_irq - interrupt routine
762 * @irq: Number of interrupt ( not used, correct number is assumed )
763 * @vip: local data structure containing all information
764 *
765 * check for both frame interrupts set ( top and bottom ).
766 * check FIFO overflow, but limit number of log messages after open.
767 * signal a complete buffer if done
768 *
769 * return value: IRQ_NONE, interrupt was not generated by VIP
770 *
771 * IRQ_HANDLED, interrupt done.
772 */
vip_irq(int irq,struct sta2x11_vip * vip)773 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip)
774 {
775 unsigned int status;
776
777 status = reg_read(vip, DVP_ITS);
778
779 if (!status) /* No interrupt to handle */
780 return IRQ_NONE;
781
782 if (status & DVP_IT_FIFO)
783 if (vip->overflow++ > 5)
784 pr_info("VIP: fifo overflow\n");
785
786 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) {
787 /* this is bad, we are too slow, hope the condition is gone
788 * on the next frame */
789 return IRQ_HANDLED;
790 }
791
792 if (status & DVP_IT_VST)
793 if ((++vip->tcount) < 2)
794 return IRQ_HANDLED;
795 if (status & DVP_IT_VSB) {
796 vip->bcount++;
797 return IRQ_HANDLED;
798 }
799
800 if (vip->active) { /* Acquisition is over on this buffer */
801 /* Disable acquisition */
802 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
803 /* Remove the active buffer from the list */
804 vip->active->vb.vb2_buf.timestamp = ktime_get_ns();
805 vip->active->vb.sequence = vip->sequence++;
806 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE);
807 }
808
809 return IRQ_HANDLED;
810 }
811
sta2x11_vip_init_register(struct sta2x11_vip * vip)812 static void sta2x11_vip_init_register(struct sta2x11_vip *vip)
813 {
814 /* Register initialization */
815 spin_lock_irq(&vip->slock);
816 /* Clean interrupt */
817 reg_read(vip, DVP_ITS);
818 /* Enable Half Line per vertical */
819 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD);
820 /* Reset VIP control */
821 reg_write(vip, DVP_CTL, DVP_CTL_RST);
822 /* Clear VIP control */
823 reg_write(vip, DVP_CTL, 0);
824 spin_unlock_irq(&vip->slock);
825 }
sta2x11_vip_clear_register(struct sta2x11_vip * vip)826 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip)
827 {
828 spin_lock_irq(&vip->slock);
829 /* Disable interrupt */
830 reg_write(vip, DVP_ITM, 0);
831 /* Reset VIP Control */
832 reg_write(vip, DVP_CTL, DVP_CTL_RST);
833 /* Clear VIP Control */
834 reg_write(vip, DVP_CTL, 0);
835 /* Clean VIP Interrupt */
836 reg_read(vip, DVP_ITS);
837 spin_unlock_irq(&vip->slock);
838 }
sta2x11_vip_init_buffer(struct sta2x11_vip * vip)839 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip)
840 {
841 int err;
842
843 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29));
844 if (err) {
845 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask");
846 return err;
847 }
848 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue));
849 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
850 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ;
851 vip->vb_vidq.drv_priv = vip;
852 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer);
853 vip->vb_vidq.ops = &vip_video_qops;
854 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops;
855 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
856 vip->vb_vidq.dev = &vip->pdev->dev;
857 vip->vb_vidq.lock = &vip->v4l_lock;
858 err = vb2_queue_init(&vip->vb_vidq);
859 if (err)
860 return err;
861 INIT_LIST_HEAD(&vip->buffer_list);
862 spin_lock_init(&vip->lock);
863 return 0;
864 }
865
sta2x11_vip_init_controls(struct sta2x11_vip * vip)866 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip)
867 {
868 /*
869 * Inititialize an empty control so VIP can inerithing controls
870 * from ADV7180
871 */
872 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0);
873
874 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl;
875 if (vip->ctrl_hdl.error) {
876 int err = vip->ctrl_hdl.error;
877
878 v4l2_ctrl_handler_free(&vip->ctrl_hdl);
879 return err;
880 }
881
882 return 0;
883 }
884
885 /**
886 * vip_gpio_reserve - reserve gpio pin
887 * @dev: device
888 * @pin: GPIO pin number
889 * @dir: direction, input or output
890 * @name: GPIO pin name
891 *
892 */
vip_gpio_reserve(struct device * dev,int pin,int dir,const char * name)893 static int vip_gpio_reserve(struct device *dev, int pin, int dir,
894 const char *name)
895 {
896 int ret = -ENODEV;
897
898 if (!gpio_is_valid(pin))
899 return ret;
900
901 ret = gpio_request(pin, name);
902 if (ret) {
903 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
904 return ret;
905 }
906
907 ret = gpio_direction_output(pin, dir);
908 if (ret) {
909 dev_err(dev, "Failed to set direction for pin %d (%s)\n",
910 pin, name);
911 gpio_free(pin);
912 return ret;
913 }
914
915 ret = gpio_export(pin, false);
916 if (ret) {
917 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
918 gpio_free(pin);
919 return ret;
920 }
921
922 return 0;
923 }
924
925 /**
926 * vip_gpio_release - release gpio pin
927 * @dev: device
928 * @pin: GPIO pin number
929 * @name: GPIO pin name
930 *
931 */
vip_gpio_release(struct device * dev,int pin,const char * name)932 static void vip_gpio_release(struct device *dev, int pin, const char *name)
933 {
934 if (gpio_is_valid(pin)) {
935 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
936 gpio_unexport(pin);
937 gpio_free(pin);
938 }
939 }
940
941 /**
942 * sta2x11_vip_init_one - init one instance of video device
943 * @pdev: PCI device
944 * @ent: (not used)
945 *
946 * allocate reset pins for DAC.
947 * Reset video DAC, this is done via reset line.
948 * allocate memory for managing device
949 * request interrupt
950 * map IO region
951 * register device
952 * find and initialize video DAC
953 *
954 * return value: 0, no error
955 *
956 * -ENOMEM, no memory
957 *
958 * -ENODEV, device could not be detected or registered
959 */
sta2x11_vip_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)960 static int sta2x11_vip_init_one(struct pci_dev *pdev,
961 const struct pci_device_id *ent)
962 {
963 int ret;
964 struct sta2x11_vip *vip;
965 struct vip_config *config;
966
967 /* Check if hardware support 26-bit DMA */
968 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) {
969 dev_err(&pdev->dev, "26-bit DMA addressing not available\n");
970 return -EINVAL;
971 }
972 /* Enable PCI */
973 ret = pci_enable_device(pdev);
974 if (ret)
975 return ret;
976
977 /* Get VIP platform data */
978 config = dev_get_platdata(&pdev->dev);
979 if (!config) {
980 dev_info(&pdev->dev, "VIP slot disabled\n");
981 ret = -EINVAL;
982 goto disable;
983 }
984
985 /* Power configuration */
986 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
987 config->pwr_name);
988 if (ret)
989 goto disable;
990
991 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
992 config->reset_name);
993 if (ret) {
994 vip_gpio_release(&pdev->dev, config->pwr_pin,
995 config->pwr_name);
996 goto disable;
997 }
998
999 if (gpio_is_valid(config->pwr_pin)) {
1000 /* Datasheet says 5ms between PWR and RST */
1001 usleep_range(5000, 25000);
1002 gpio_direction_output(config->pwr_pin, 1);
1003 }
1004
1005 if (gpio_is_valid(config->reset_pin)) {
1006 /* Datasheet says 5ms between PWR and RST */
1007 usleep_range(5000, 25000);
1008 gpio_direction_output(config->reset_pin, 1);
1009 }
1010 usleep_range(5000, 25000);
1011
1012 /* Allocate a new VIP instance */
1013 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL);
1014 if (!vip) {
1015 ret = -ENOMEM;
1016 goto release_gpios;
1017 }
1018 vip->pdev = pdev;
1019 vip->std = V4L2_STD_PAL;
1020 vip->format = formats_50[0];
1021 vip->config = config;
1022 mutex_init(&vip->v4l_lock);
1023
1024 ret = sta2x11_vip_init_controls(vip);
1025 if (ret)
1026 goto free_mem;
1027 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev);
1028 if (ret)
1029 goto free_mem;
1030
1031 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1032 (unsigned long)pci_resource_start(pdev, 0),
1033 (unsigned long)pci_resource_len(pdev, 0), pdev->irq);
1034
1035 pci_set_master(pdev);
1036
1037 ret = pci_request_regions(pdev, KBUILD_MODNAME);
1038 if (ret)
1039 goto unreg;
1040
1041 vip->iomem = pci_iomap(pdev, 0, 0x100);
1042 if (!vip->iomem) {
1043 ret = -ENOMEM;
1044 goto release;
1045 }
1046
1047 pci_enable_msi(pdev);
1048
1049 /* Initialize buffer */
1050 ret = sta2x11_vip_init_buffer(vip);
1051 if (ret)
1052 goto unmap;
1053
1054 spin_lock_init(&vip->slock);
1055
1056 ret = request_irq(pdev->irq,
1057 (irq_handler_t) vip_irq,
1058 IRQF_SHARED, KBUILD_MODNAME, vip);
1059 if (ret) {
1060 dev_err(&pdev->dev, "request_irq failed\n");
1061 ret = -ENODEV;
1062 goto release_buf;
1063 }
1064
1065 /* Initialize and register video device */
1066 vip->video_dev = video_dev_template;
1067 vip->video_dev.v4l2_dev = &vip->v4l2_dev;
1068 vip->video_dev.queue = &vip->vb_vidq;
1069 vip->video_dev.lock = &vip->v4l_lock;
1070 video_set_drvdata(&vip->video_dev, vip);
1071
1072 ret = video_register_device(&vip->video_dev, VFL_TYPE_VIDEO, -1);
1073 if (ret)
1074 goto vrelease;
1075
1076 /* Get ADV7180 subdevice */
1077 vip->adapter = i2c_get_adapter(vip->config->i2c_id);
1078 if (!vip->adapter) {
1079 ret = -ENODEV;
1080 dev_err(&pdev->dev, "no I2C adapter found\n");
1081 goto vunreg;
1082 }
1083
1084 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter,
1085 "adv7180", vip->config->i2c_addr,
1086 NULL);
1087 if (!vip->decoder) {
1088 ret = -ENODEV;
1089 dev_err(&pdev->dev, "no decoder found\n");
1090 goto vunreg;
1091 }
1092
1093 i2c_put_adapter(vip->adapter);
1094 v4l2_subdev_call(vip->decoder, core, init, 0);
1095
1096 sta2x11_vip_init_register(vip);
1097
1098 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n");
1099 return 0;
1100
1101 vunreg:
1102 video_set_drvdata(&vip->video_dev, NULL);
1103 vrelease:
1104 vb2_video_unregister_device(&vip->video_dev);
1105 free_irq(pdev->irq, vip);
1106 release_buf:
1107 pci_disable_msi(pdev);
1108 unmap:
1109 pci_iounmap(pdev, vip->iomem);
1110 release:
1111 pci_release_regions(pdev);
1112 unreg:
1113 v4l2_device_unregister(&vip->v4l2_dev);
1114 free_mem:
1115 kfree(vip);
1116 release_gpios:
1117 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name);
1118 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name);
1119 disable:
1120 /*
1121 * do not call pci_disable_device on sta2x11 because it break all
1122 * other Bus masters on this EP
1123 */
1124 return ret;
1125 }
1126
1127 /**
1128 * sta2x11_vip_remove_one - release device
1129 * @pdev: PCI device
1130 *
1131 * Undo everything done in .._init_one
1132 *
1133 * unregister video device
1134 * free interrupt
1135 * unmap ioadresses
1136 * free memory
1137 * free GPIO pins
1138 */
sta2x11_vip_remove_one(struct pci_dev * pdev)1139 static void sta2x11_vip_remove_one(struct pci_dev *pdev)
1140 {
1141 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1142 struct sta2x11_vip *vip =
1143 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1144
1145 sta2x11_vip_clear_register(vip);
1146
1147 video_set_drvdata(&vip->video_dev, NULL);
1148 vb2_video_unregister_device(&vip->video_dev);
1149 free_irq(pdev->irq, vip);
1150 pci_disable_msi(pdev);
1151 pci_iounmap(pdev, vip->iomem);
1152 pci_release_regions(pdev);
1153
1154 v4l2_device_unregister(&vip->v4l2_dev);
1155
1156 vip_gpio_release(&pdev->dev, vip->config->pwr_pin,
1157 vip->config->pwr_name);
1158 vip_gpio_release(&pdev->dev, vip->config->reset_pin,
1159 vip->config->reset_name);
1160
1161 kfree(vip);
1162 /*
1163 * do not call pci_disable_device on sta2x11 because it break all
1164 * other Bus masters on this EP
1165 */
1166 }
1167
1168 /**
1169 * sta2x11_vip_suspend - set device into power save mode
1170 * @dev_d: PCI device
1171 *
1172 * all relevant registers are saved and an attempt to set a new state is made.
1173 *
1174 * return value: 0 always indicate success,
1175 * even if device could not be disabled. (workaround for hardware problem)
1176 */
sta2x11_vip_suspend(struct device * dev_d)1177 static int __maybe_unused sta2x11_vip_suspend(struct device *dev_d)
1178 {
1179 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d);
1180 struct sta2x11_vip *vip =
1181 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1182 unsigned long flags;
1183 int i;
1184
1185 spin_lock_irqsave(&vip->slock, flags);
1186 vip->register_save_area[0] = reg_read(vip, DVP_CTL);
1187 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS);
1188 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM);
1189 reg_write(vip, DVP_ITM, 0);
1190 for (i = 1; i < SAVE_COUNT; i++)
1191 vip->register_save_area[i] = reg_read(vip, 4 * i);
1192 for (i = 0; i < AUX_COUNT; i++)
1193 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] =
1194 reg_read(vip, registers_to_save[i]);
1195 spin_unlock_irqrestore(&vip->slock, flags);
1196
1197 vip->disabled = 1;
1198
1199 pr_info("VIP: suspend\n");
1200 return 0;
1201 }
1202
1203 /**
1204 * sta2x11_vip_resume - resume device operation
1205 * @dev_d : PCI device
1206 *
1207 * return value: 0, no error.
1208 *
1209 * other, could not set device to power on state.
1210 */
sta2x11_vip_resume(struct device * dev_d)1211 static int __maybe_unused sta2x11_vip_resume(struct device *dev_d)
1212 {
1213 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d);
1214 struct sta2x11_vip *vip =
1215 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1216 unsigned long flags;
1217 int i;
1218
1219 pr_info("VIP: resume\n");
1220
1221 vip->disabled = 0;
1222
1223 spin_lock_irqsave(&vip->slock, flags);
1224 for (i = 1; i < SAVE_COUNT; i++)
1225 reg_write(vip, 4 * i, vip->register_save_area[i]);
1226 for (i = 0; i < AUX_COUNT; i++)
1227 reg_write(vip, registers_to_save[i],
1228 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]);
1229 reg_write(vip, DVP_CTL, vip->register_save_area[0]);
1230 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]);
1231 spin_unlock_irqrestore(&vip->slock, flags);
1232 return 0;
1233 }
1234
1235 static const struct pci_device_id sta2x11_vip_pci_tbl[] = {
1236 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)},
1237 {0,}
1238 };
1239
1240 static SIMPLE_DEV_PM_OPS(sta2x11_vip_pm_ops,
1241 sta2x11_vip_suspend,
1242 sta2x11_vip_resume);
1243
1244 static struct pci_driver sta2x11_vip_driver = {
1245 .name = KBUILD_MODNAME,
1246 .probe = sta2x11_vip_init_one,
1247 .remove = sta2x11_vip_remove_one,
1248 .id_table = sta2x11_vip_pci_tbl,
1249 .driver.pm = &sta2x11_vip_pm_ops,
1250 };
1251
sta2x11_vip_init_module(void)1252 static int __init sta2x11_vip_init_module(void)
1253 {
1254 return pci_register_driver(&sta2x11_vip_driver);
1255 }
1256
sta2x11_vip_exit_module(void)1257 static void __exit sta2x11_vip_exit_module(void)
1258 {
1259 pci_unregister_driver(&sta2x11_vip_driver);
1260 }
1261
1262 #ifdef MODULE
1263 module_init(sta2x11_vip_init_module);
1264 module_exit(sta2x11_vip_exit_module);
1265 #else
1266 late_initcall_sync(sta2x11_vip_init_module);
1267 #endif
1268
1269 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1270 MODULE_AUTHOR("Wind River");
1271 MODULE_LICENSE("GPL v2");
1272 MODULE_VERSION(DRV_VERSION);
1273 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);
1274