1 /* 2 * Copyright (c) 2011 Atmel Corporation 3 * Josh Wu, <josh.wu@atmel.com> 4 * 5 * Based on previous work by Lars Haring, <lars.haring@atmel.com> 6 * and Sedji Gaouaou 7 * Based on the bttv driver for Bt848 with respective copyright holders 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14 #include <linux/clk.h> 15 #include <linux/completion.h> 16 #include <linux/delay.h> 17 #include <linux/fs.h> 18 #include <linux/init.h> 19 #include <linux/interrupt.h> 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/platform_device.h> 23 #include <linux/pm_runtime.h> 24 #include <linux/slab.h> 25 #include <linux/of.h> 26 27 #include <linux/videodev2.h> 28 #include <media/v4l2-ctrls.h> 29 #include <media/v4l2-device.h> 30 #include <media/v4l2-dev.h> 31 #include <media/v4l2-ioctl.h> 32 #include <media/v4l2-event.h> 33 #include <media/v4l2-of.h> 34 #include <media/videobuf2-dma-contig.h> 35 #include <media/v4l2-image-sizes.h> 36 37 #include "atmel-isi.h" 38 39 #define MAX_SUPPORT_WIDTH 2048 40 #define MAX_SUPPORT_HEIGHT 2048 41 #define MIN_FRAME_RATE 15 42 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE) 43 44 /* Frame buffer descriptor */ 45 struct fbd { 46 /* Physical address of the frame buffer */ 47 u32 fb_address; 48 /* DMA Control Register(only in HISI2) */ 49 u32 dma_ctrl; 50 /* Physical address of the next fbd */ 51 u32 next_fbd_address; 52 }; 53 54 static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl) 55 { 56 fb_desc->dma_ctrl = ctrl; 57 } 58 59 struct isi_dma_desc { 60 struct list_head list; 61 struct fbd *p_fbd; 62 dma_addr_t fbd_phys; 63 }; 64 65 /* Frame buffer data */ 66 struct frame_buffer { 67 struct vb2_v4l2_buffer vb; 68 struct isi_dma_desc *p_dma_desc; 69 struct list_head list; 70 }; 71 72 struct isi_graph_entity { 73 struct device_node *node; 74 75 struct v4l2_async_subdev asd; 76 struct v4l2_subdev *subdev; 77 }; 78 79 /* 80 * struct isi_format - ISI media bus format information 81 * @fourcc: Fourcc code for this format 82 * @mbus_code: V4L2 media bus format code. 83 * @bpp: Bytes per pixel (when stored in memory) 84 * @swap: Byte swap configuration value 85 * @support: Indicates format supported by subdev 86 * @skip: Skip duplicate format supported by subdev 87 */ 88 struct isi_format { 89 u32 fourcc; 90 u32 mbus_code; 91 u8 bpp; 92 u32 swap; 93 }; 94 95 96 struct atmel_isi { 97 /* Protects the access of variables shared with the ISR */ 98 spinlock_t irqlock; 99 struct device *dev; 100 void __iomem *regs; 101 102 int sequence; 103 104 /* Allocate descriptors for dma buffer use */ 105 struct fbd *p_fb_descriptors; 106 dma_addr_t fb_descriptors_phys; 107 struct list_head dma_desc_head; 108 struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME]; 109 bool enable_preview_path; 110 111 struct completion complete; 112 /* ISI peripherial clock */ 113 struct clk *pclk; 114 unsigned int irq; 115 116 struct isi_platform_data pdata; 117 u16 width_flags; /* max 12 bits */ 118 119 struct list_head video_buffer_list; 120 struct frame_buffer *active; 121 122 struct v4l2_device v4l2_dev; 123 struct video_device *vdev; 124 struct v4l2_async_notifier notifier; 125 struct isi_graph_entity entity; 126 struct v4l2_format fmt; 127 128 const struct isi_format **user_formats; 129 unsigned int num_user_formats; 130 const struct isi_format *current_fmt; 131 132 struct mutex lock; 133 struct vb2_queue queue; 134 }; 135 136 #define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier) 137 138 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) 139 { 140 writel(val, isi->regs + reg); 141 } 142 static u32 isi_readl(struct atmel_isi *isi, u32 reg) 143 { 144 return readl(isi->regs + reg); 145 } 146 147 static void configure_geometry(struct atmel_isi *isi) 148 { 149 u32 cfg2, psize; 150 u32 fourcc = isi->current_fmt->fourcc; 151 152 isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 || 153 fourcc == V4L2_PIX_FMT_RGB32; 154 155 /* According to sensor's output format to set cfg2 */ 156 cfg2 = isi->current_fmt->swap; 157 158 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 159 /* Set width */ 160 cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) & 161 ISI_CFG2_IM_HSIZE_MASK; 162 /* Set height */ 163 cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET) 164 & ISI_CFG2_IM_VSIZE_MASK; 165 isi_writel(isi, ISI_CFG2, cfg2); 166 167 /* No down sampling, preview size equal to sensor output size */ 168 psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) & 169 ISI_PSIZE_PREV_HSIZE_MASK; 170 psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) & 171 ISI_PSIZE_PREV_VSIZE_MASK; 172 isi_writel(isi, ISI_PSIZE, psize); 173 isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING); 174 } 175 176 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi) 177 { 178 if (isi->active) { 179 struct vb2_v4l2_buffer *vbuf = &isi->active->vb; 180 struct frame_buffer *buf = isi->active; 181 182 list_del_init(&buf->list); 183 vbuf->vb2_buf.timestamp = ktime_get_ns(); 184 vbuf->sequence = isi->sequence++; 185 vbuf->field = V4L2_FIELD_NONE; 186 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE); 187 } 188 189 if (list_empty(&isi->video_buffer_list)) { 190 isi->active = NULL; 191 } else { 192 /* start next dma frame. */ 193 isi->active = list_entry(isi->video_buffer_list.next, 194 struct frame_buffer, list); 195 if (!isi->enable_preview_path) { 196 isi_writel(isi, ISI_DMA_C_DSCR, 197 (u32)isi->active->p_dma_desc->fbd_phys); 198 isi_writel(isi, ISI_DMA_C_CTRL, 199 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 200 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 201 } else { 202 isi_writel(isi, ISI_DMA_P_DSCR, 203 (u32)isi->active->p_dma_desc->fbd_phys); 204 isi_writel(isi, ISI_DMA_P_CTRL, 205 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 206 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 207 } 208 } 209 return IRQ_HANDLED; 210 } 211 212 /* ISI interrupt service routine */ 213 static irqreturn_t isi_interrupt(int irq, void *dev_id) 214 { 215 struct atmel_isi *isi = dev_id; 216 u32 status, mask, pending; 217 irqreturn_t ret = IRQ_NONE; 218 219 spin_lock(&isi->irqlock); 220 221 status = isi_readl(isi, ISI_STATUS); 222 mask = isi_readl(isi, ISI_INTMASK); 223 pending = status & mask; 224 225 if (pending & ISI_CTRL_SRST) { 226 complete(&isi->complete); 227 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST); 228 ret = IRQ_HANDLED; 229 } else if (pending & ISI_CTRL_DIS) { 230 complete(&isi->complete); 231 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS); 232 ret = IRQ_HANDLED; 233 } else { 234 if (likely(pending & ISI_SR_CXFR_DONE) || 235 likely(pending & ISI_SR_PXFR_DONE)) 236 ret = atmel_isi_handle_streaming(isi); 237 } 238 239 spin_unlock(&isi->irqlock); 240 return ret; 241 } 242 243 #define WAIT_ISI_RESET 1 244 #define WAIT_ISI_DISABLE 0 245 static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset) 246 { 247 unsigned long timeout; 248 /* 249 * The reset or disable will only succeed if we have a 250 * pixel clock from the camera. 251 */ 252 init_completion(&isi->complete); 253 254 if (wait_reset) { 255 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST); 256 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST); 257 } else { 258 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS); 259 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 260 } 261 262 timeout = wait_for_completion_timeout(&isi->complete, 263 msecs_to_jiffies(500)); 264 if (timeout == 0) 265 return -ETIMEDOUT; 266 267 return 0; 268 } 269 270 /* ------------------------------------------------------------------ 271 Videobuf operations 272 ------------------------------------------------------------------*/ 273 static int queue_setup(struct vb2_queue *vq, 274 unsigned int *nbuffers, unsigned int *nplanes, 275 unsigned int sizes[], struct device *alloc_devs[]) 276 { 277 struct atmel_isi *isi = vb2_get_drv_priv(vq); 278 unsigned long size; 279 280 size = isi->fmt.fmt.pix.sizeimage; 281 282 /* Make sure the image size is large enough. */ 283 if (*nplanes) 284 return sizes[0] < size ? -EINVAL : 0; 285 286 *nplanes = 1; 287 sizes[0] = size; 288 289 isi->active = NULL; 290 291 dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__, 292 *nbuffers, size); 293 294 return 0; 295 } 296 297 static int buffer_init(struct vb2_buffer *vb) 298 { 299 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 300 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 301 302 buf->p_dma_desc = NULL; 303 INIT_LIST_HEAD(&buf->list); 304 305 return 0; 306 } 307 308 static int buffer_prepare(struct vb2_buffer *vb) 309 { 310 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 311 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 312 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 313 unsigned long size; 314 struct isi_dma_desc *desc; 315 316 size = isi->fmt.fmt.pix.sizeimage; 317 318 if (vb2_plane_size(vb, 0) < size) { 319 dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n", 320 __func__, vb2_plane_size(vb, 0), size); 321 return -EINVAL; 322 } 323 324 vb2_set_plane_payload(vb, 0, size); 325 326 if (!buf->p_dma_desc) { 327 if (list_empty(&isi->dma_desc_head)) { 328 dev_err(isi->dev, "Not enough dma descriptors.\n"); 329 return -EINVAL; 330 } else { 331 /* Get an available descriptor */ 332 desc = list_entry(isi->dma_desc_head.next, 333 struct isi_dma_desc, list); 334 /* Delete the descriptor since now it is used */ 335 list_del_init(&desc->list); 336 337 /* Initialize the dma descriptor */ 338 desc->p_fbd->fb_address = 339 vb2_dma_contig_plane_dma_addr(vb, 0); 340 desc->p_fbd->next_fbd_address = 0; 341 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB); 342 343 buf->p_dma_desc = desc; 344 } 345 } 346 return 0; 347 } 348 349 static void buffer_cleanup(struct vb2_buffer *vb) 350 { 351 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 352 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 353 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 354 355 /* This descriptor is available now and we add to head list */ 356 if (buf->p_dma_desc) 357 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head); 358 } 359 360 static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer) 361 { 362 u32 ctrl, cfg1; 363 364 cfg1 = isi_readl(isi, ISI_CFG1); 365 /* Enable irq: cxfr for the codec path, pxfr for the preview path */ 366 isi_writel(isi, ISI_INTEN, 367 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 368 369 /* Check if already in a frame */ 370 if (!isi->enable_preview_path) { 371 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) { 372 dev_err(isi->dev, "Already in frame handling.\n"); 373 return; 374 } 375 376 isi_writel(isi, ISI_DMA_C_DSCR, 377 (u32)buffer->p_dma_desc->fbd_phys); 378 isi_writel(isi, ISI_DMA_C_CTRL, 379 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 380 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 381 } else { 382 isi_writel(isi, ISI_DMA_P_DSCR, 383 (u32)buffer->p_dma_desc->fbd_phys); 384 isi_writel(isi, ISI_DMA_P_CTRL, 385 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 386 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 387 } 388 389 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK; 390 /* Enable linked list */ 391 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR; 392 393 /* Enable ISI */ 394 ctrl = ISI_CTRL_EN; 395 396 if (!isi->enable_preview_path) 397 ctrl |= ISI_CTRL_CDC; 398 399 isi_writel(isi, ISI_CTRL, ctrl); 400 isi_writel(isi, ISI_CFG1, cfg1); 401 } 402 403 static void buffer_queue(struct vb2_buffer *vb) 404 { 405 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 406 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 407 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 408 unsigned long flags = 0; 409 410 spin_lock_irqsave(&isi->irqlock, flags); 411 list_add_tail(&buf->list, &isi->video_buffer_list); 412 413 if (isi->active == NULL) { 414 isi->active = buf; 415 if (vb2_is_streaming(vb->vb2_queue)) 416 start_dma(isi, buf); 417 } 418 spin_unlock_irqrestore(&isi->irqlock, flags); 419 } 420 421 static int start_streaming(struct vb2_queue *vq, unsigned int count) 422 { 423 struct atmel_isi *isi = vb2_get_drv_priv(vq); 424 struct frame_buffer *buf, *node; 425 int ret; 426 427 /* Enable stream on the sub device */ 428 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1); 429 if (ret && ret != -ENOIOCTLCMD) { 430 dev_err(isi->dev, "stream on failed in subdev\n"); 431 goto err_start_stream; 432 } 433 434 pm_runtime_get_sync(isi->dev); 435 436 /* Reset ISI */ 437 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); 438 if (ret < 0) { 439 dev_err(isi->dev, "Reset ISI timed out\n"); 440 goto err_reset; 441 } 442 /* Disable all interrupts */ 443 isi_writel(isi, ISI_INTDIS, (u32)~0UL); 444 445 isi->sequence = 0; 446 configure_geometry(isi); 447 448 spin_lock_irq(&isi->irqlock); 449 /* Clear any pending interrupt */ 450 isi_readl(isi, ISI_STATUS); 451 452 start_dma(isi, isi->active); 453 spin_unlock_irq(&isi->irqlock); 454 455 return 0; 456 457 err_reset: 458 pm_runtime_put(isi->dev); 459 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 460 461 err_start_stream: 462 spin_lock_irq(&isi->irqlock); 463 isi->active = NULL; 464 /* Release all active buffers */ 465 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 466 list_del_init(&buf->list); 467 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); 468 } 469 spin_unlock_irq(&isi->irqlock); 470 471 return ret; 472 } 473 474 /* abort streaming and wait for last buffer */ 475 static void stop_streaming(struct vb2_queue *vq) 476 { 477 struct atmel_isi *isi = vb2_get_drv_priv(vq); 478 struct frame_buffer *buf, *node; 479 int ret = 0; 480 unsigned long timeout; 481 482 /* Disable stream on the sub device */ 483 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 484 if (ret && ret != -ENOIOCTLCMD) 485 dev_err(isi->dev, "stream off failed in subdev\n"); 486 487 spin_lock_irq(&isi->irqlock); 488 isi->active = NULL; 489 /* Release all active buffers */ 490 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 491 list_del_init(&buf->list); 492 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 493 } 494 spin_unlock_irq(&isi->irqlock); 495 496 if (!isi->enable_preview_path) { 497 timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ; 498 /* Wait until the end of the current frame. */ 499 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) && 500 time_before(jiffies, timeout)) 501 msleep(1); 502 503 if (time_after(jiffies, timeout)) 504 dev_err(isi->dev, 505 "Timeout waiting for finishing codec request\n"); 506 } 507 508 /* Disable interrupts */ 509 isi_writel(isi, ISI_INTDIS, 510 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 511 512 /* Disable ISI and wait for it is done */ 513 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE); 514 if (ret < 0) 515 dev_err(isi->dev, "Disable ISI timed out\n"); 516 517 pm_runtime_put(isi->dev); 518 } 519 520 static const struct vb2_ops isi_video_qops = { 521 .queue_setup = queue_setup, 522 .buf_init = buffer_init, 523 .buf_prepare = buffer_prepare, 524 .buf_cleanup = buffer_cleanup, 525 .buf_queue = buffer_queue, 526 .start_streaming = start_streaming, 527 .stop_streaming = stop_streaming, 528 .wait_prepare = vb2_ops_wait_prepare, 529 .wait_finish = vb2_ops_wait_finish, 530 }; 531 532 static int isi_g_fmt_vid_cap(struct file *file, void *priv, 533 struct v4l2_format *fmt) 534 { 535 struct atmel_isi *isi = video_drvdata(file); 536 537 *fmt = isi->fmt; 538 539 return 0; 540 } 541 542 static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi, 543 unsigned int fourcc) 544 { 545 unsigned int num_formats = isi->num_user_formats; 546 const struct isi_format *fmt; 547 unsigned int i; 548 549 for (i = 0; i < num_formats; i++) { 550 fmt = isi->user_formats[i]; 551 if (fmt->fourcc == fourcc) 552 return fmt; 553 } 554 555 return NULL; 556 } 557 558 static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, 559 const struct isi_format **current_fmt) 560 { 561 const struct isi_format *isi_fmt; 562 struct v4l2_pix_format *pixfmt = &f->fmt.pix; 563 struct v4l2_subdev_pad_config pad_cfg; 564 struct v4l2_subdev_format format = { 565 .which = V4L2_SUBDEV_FORMAT_TRY, 566 }; 567 int ret; 568 569 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 570 return -EINVAL; 571 572 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 573 if (!isi_fmt) { 574 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 575 pixfmt->pixelformat = isi_fmt->fourcc; 576 } 577 578 /* Limit to Atmel ISC hardware capabilities */ 579 if (pixfmt->width > MAX_SUPPORT_WIDTH) 580 pixfmt->width = MAX_SUPPORT_WIDTH; 581 if (pixfmt->height > MAX_SUPPORT_HEIGHT) 582 pixfmt->height = MAX_SUPPORT_HEIGHT; 583 584 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 585 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 586 &pad_cfg, &format); 587 if (ret < 0) 588 return ret; 589 590 v4l2_fill_pix_format(pixfmt, &format.format); 591 592 pixfmt->field = V4L2_FIELD_NONE; 593 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 594 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 595 596 if (current_fmt) 597 *current_fmt = isi_fmt; 598 599 return 0; 600 } 601 602 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 603 { 604 struct v4l2_subdev_format format = { 605 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 606 }; 607 const struct isi_format *current_fmt; 608 int ret; 609 610 ret = isi_try_fmt(isi, f, ¤t_fmt); 611 if (ret) 612 return ret; 613 614 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 615 current_fmt->mbus_code); 616 ret = v4l2_subdev_call(isi->entity.subdev, pad, 617 set_fmt, NULL, &format); 618 if (ret < 0) 619 return ret; 620 621 isi->fmt = *f; 622 isi->current_fmt = current_fmt; 623 624 return 0; 625 } 626 627 static int isi_s_fmt_vid_cap(struct file *file, void *priv, 628 struct v4l2_format *f) 629 { 630 struct atmel_isi *isi = video_drvdata(file); 631 632 if (vb2_is_streaming(&isi->queue)) 633 return -EBUSY; 634 635 return isi_set_fmt(isi, f); 636 } 637 638 static int isi_try_fmt_vid_cap(struct file *file, void *priv, 639 struct v4l2_format *f) 640 { 641 struct atmel_isi *isi = video_drvdata(file); 642 643 return isi_try_fmt(isi, f, NULL); 644 } 645 646 static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 647 struct v4l2_fmtdesc *f) 648 { 649 struct atmel_isi *isi = video_drvdata(file); 650 651 if (f->index >= isi->num_user_formats) 652 return -EINVAL; 653 654 f->pixelformat = isi->user_formats[f->index]->fourcc; 655 return 0; 656 } 657 658 static int isi_querycap(struct file *file, void *priv, 659 struct v4l2_capability *cap) 660 { 661 strlcpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 662 strlcpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 663 strlcpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 664 return 0; 665 } 666 667 static int isi_enum_input(struct file *file, void *priv, 668 struct v4l2_input *i) 669 { 670 if (i->index != 0) 671 return -EINVAL; 672 673 i->type = V4L2_INPUT_TYPE_CAMERA; 674 strlcpy(i->name, "Camera", sizeof(i->name)); 675 return 0; 676 } 677 678 static int isi_g_input(struct file *file, void *priv, unsigned int *i) 679 { 680 *i = 0; 681 return 0; 682 } 683 684 static int isi_s_input(struct file *file, void *priv, unsigned int i) 685 { 686 if (i > 0) 687 return -EINVAL; 688 return 0; 689 } 690 691 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 692 { 693 struct atmel_isi *isi = video_drvdata(file); 694 695 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 696 return -EINVAL; 697 698 a->parm.capture.readbuffers = 2; 699 return v4l2_subdev_call(isi->entity.subdev, video, g_parm, a); 700 } 701 702 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 703 { 704 struct atmel_isi *isi = video_drvdata(file); 705 706 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 707 return -EINVAL; 708 709 a->parm.capture.readbuffers = 2; 710 return v4l2_subdev_call(isi->entity.subdev, video, s_parm, a); 711 } 712 713 static int isi_enum_framesizes(struct file *file, void *fh, 714 struct v4l2_frmsizeenum *fsize) 715 { 716 struct atmel_isi *isi = video_drvdata(file); 717 const struct isi_format *isi_fmt; 718 struct v4l2_subdev_frame_size_enum fse = { 719 .index = fsize->index, 720 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 721 }; 722 int ret; 723 724 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 725 if (!isi_fmt) 726 return -EINVAL; 727 728 fse.code = isi_fmt->mbus_code; 729 730 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 731 NULL, &fse); 732 if (ret) 733 return ret; 734 735 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 736 fsize->discrete.width = fse.max_width; 737 fsize->discrete.height = fse.max_height; 738 739 return 0; 740 } 741 742 static int isi_enum_frameintervals(struct file *file, void *fh, 743 struct v4l2_frmivalenum *fival) 744 { 745 struct atmel_isi *isi = video_drvdata(file); 746 const struct isi_format *isi_fmt; 747 struct v4l2_subdev_frame_interval_enum fie = { 748 .index = fival->index, 749 .width = fival->width, 750 .height = fival->height, 751 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 752 }; 753 int ret; 754 755 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 756 if (!isi_fmt) 757 return -EINVAL; 758 759 fie.code = isi_fmt->mbus_code; 760 761 ret = v4l2_subdev_call(isi->entity.subdev, pad, 762 enum_frame_interval, NULL, &fie); 763 if (ret) 764 return ret; 765 766 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 767 fival->discrete = fie.interval; 768 769 return 0; 770 } 771 772 static void isi_camera_set_bus_param(struct atmel_isi *isi) 773 { 774 u32 cfg1 = 0; 775 776 /* set bus param for ISI */ 777 if (isi->pdata.hsync_act_low) 778 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 779 if (isi->pdata.vsync_act_low) 780 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 781 if (isi->pdata.pclk_act_falling) 782 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 783 if (isi->pdata.has_emb_sync) 784 cfg1 |= ISI_CFG1_EMB_SYNC; 785 if (isi->pdata.full_mode) 786 cfg1 |= ISI_CFG1_FULL_MODE; 787 788 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 789 790 /* Enable PM and peripheral clock before operate isi registers */ 791 pm_runtime_get_sync(isi->dev); 792 793 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 794 isi_writel(isi, ISI_CFG1, cfg1); 795 796 pm_runtime_put(isi->dev); 797 } 798 799 /* -----------------------------------------------------------------------*/ 800 static int atmel_isi_parse_dt(struct atmel_isi *isi, 801 struct platform_device *pdev) 802 { 803 struct device_node *np = pdev->dev.of_node; 804 struct v4l2_of_endpoint ep; 805 int err; 806 807 /* Default settings for ISI */ 808 isi->pdata.full_mode = 1; 809 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 810 811 np = of_graph_get_next_endpoint(np, NULL); 812 if (!np) { 813 dev_err(&pdev->dev, "Could not find the endpoint\n"); 814 return -EINVAL; 815 } 816 817 err = v4l2_of_parse_endpoint(np, &ep); 818 of_node_put(np); 819 if (err) { 820 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 821 return err; 822 } 823 824 switch (ep.bus.parallel.bus_width) { 825 case 8: 826 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 827 break; 828 case 10: 829 isi->pdata.data_width_flags = 830 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 831 break; 832 default: 833 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 834 ep.bus.parallel.bus_width); 835 return -EINVAL; 836 } 837 838 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 839 isi->pdata.hsync_act_low = true; 840 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 841 isi->pdata.vsync_act_low = true; 842 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 843 isi->pdata.pclk_act_falling = true; 844 845 if (ep.bus_type == V4L2_MBUS_BT656) 846 isi->pdata.has_emb_sync = true; 847 848 return 0; 849 } 850 851 static int isi_open(struct file *file) 852 { 853 struct atmel_isi *isi = video_drvdata(file); 854 struct v4l2_subdev *sd = isi->entity.subdev; 855 int ret; 856 857 if (mutex_lock_interruptible(&isi->lock)) 858 return -ERESTARTSYS; 859 860 ret = v4l2_fh_open(file); 861 if (ret < 0) 862 goto unlock; 863 864 if (!v4l2_fh_is_singular_file(file)) 865 goto fh_rel; 866 867 ret = v4l2_subdev_call(sd, core, s_power, 1); 868 if (ret < 0 && ret != -ENOIOCTLCMD) 869 goto fh_rel; 870 871 ret = isi_set_fmt(isi, &isi->fmt); 872 if (ret) 873 v4l2_subdev_call(sd, core, s_power, 0); 874 fh_rel: 875 if (ret) 876 v4l2_fh_release(file); 877 unlock: 878 mutex_unlock(&isi->lock); 879 return ret; 880 } 881 882 static int isi_release(struct file *file) 883 { 884 struct atmel_isi *isi = video_drvdata(file); 885 struct v4l2_subdev *sd = isi->entity.subdev; 886 bool fh_singular; 887 int ret; 888 889 mutex_lock(&isi->lock); 890 891 fh_singular = v4l2_fh_is_singular_file(file); 892 893 ret = _vb2_fop_release(file, NULL); 894 895 if (fh_singular) 896 v4l2_subdev_call(sd, core, s_power, 0); 897 898 mutex_unlock(&isi->lock); 899 900 return ret; 901 } 902 903 static const struct v4l2_ioctl_ops isi_ioctl_ops = { 904 .vidioc_querycap = isi_querycap, 905 906 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 907 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 908 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 909 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 910 911 .vidioc_enum_input = isi_enum_input, 912 .vidioc_g_input = isi_g_input, 913 .vidioc_s_input = isi_s_input, 914 915 .vidioc_g_parm = isi_g_parm, 916 .vidioc_s_parm = isi_s_parm, 917 .vidioc_enum_framesizes = isi_enum_framesizes, 918 .vidioc_enum_frameintervals = isi_enum_frameintervals, 919 920 .vidioc_reqbufs = vb2_ioctl_reqbufs, 921 .vidioc_create_bufs = vb2_ioctl_create_bufs, 922 .vidioc_querybuf = vb2_ioctl_querybuf, 923 .vidioc_qbuf = vb2_ioctl_qbuf, 924 .vidioc_dqbuf = vb2_ioctl_dqbuf, 925 .vidioc_expbuf = vb2_ioctl_expbuf, 926 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 927 .vidioc_streamon = vb2_ioctl_streamon, 928 .vidioc_streamoff = vb2_ioctl_streamoff, 929 930 .vidioc_log_status = v4l2_ctrl_log_status, 931 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 932 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 933 }; 934 935 static const struct v4l2_file_operations isi_fops = { 936 .owner = THIS_MODULE, 937 .unlocked_ioctl = video_ioctl2, 938 .open = isi_open, 939 .release = isi_release, 940 .poll = vb2_fop_poll, 941 .mmap = vb2_fop_mmap, 942 .read = vb2_fop_read, 943 }; 944 945 static int isi_set_default_fmt(struct atmel_isi *isi) 946 { 947 struct v4l2_format f = { 948 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 949 .fmt.pix = { 950 .width = VGA_WIDTH, 951 .height = VGA_HEIGHT, 952 .field = V4L2_FIELD_NONE, 953 .pixelformat = isi->user_formats[0]->fourcc, 954 }, 955 }; 956 int ret; 957 958 ret = isi_try_fmt(isi, &f, NULL); 959 if (ret) 960 return ret; 961 isi->current_fmt = isi->user_formats[0]; 962 isi->fmt = f; 963 return 0; 964 } 965 966 static const struct isi_format isi_formats[] = { 967 { 968 .fourcc = V4L2_PIX_FMT_YUYV, 969 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 970 .bpp = 2, 971 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 972 }, { 973 .fourcc = V4L2_PIX_FMT_YUYV, 974 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 975 .bpp = 2, 976 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 977 }, { 978 .fourcc = V4L2_PIX_FMT_YUYV, 979 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 980 .bpp = 2, 981 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 982 }, { 983 .fourcc = V4L2_PIX_FMT_YUYV, 984 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 985 .bpp = 2, 986 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 987 }, { 988 .fourcc = V4L2_PIX_FMT_RGB565, 989 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 990 .bpp = 2, 991 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 992 }, { 993 .fourcc = V4L2_PIX_FMT_RGB565, 994 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 995 .bpp = 2, 996 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 997 }, { 998 .fourcc = V4L2_PIX_FMT_RGB565, 999 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1000 .bpp = 2, 1001 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 1002 }, { 1003 .fourcc = V4L2_PIX_FMT_RGB565, 1004 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1005 .bpp = 2, 1006 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1007 }, 1008 }; 1009 1010 static int isi_formats_init(struct atmel_isi *isi) 1011 { 1012 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 1013 unsigned int num_fmts = 0, i, j; 1014 struct v4l2_subdev *subdev = isi->entity.subdev; 1015 struct v4l2_subdev_mbus_code_enum mbus_code = { 1016 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1017 }; 1018 1019 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1020 NULL, &mbus_code)) { 1021 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1022 if (isi_formats[i].mbus_code != mbus_code.code) 1023 continue; 1024 1025 /* Code supported, have we got this fourcc yet? */ 1026 for (j = 0; j < num_fmts; j++) 1027 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1028 /* Already available */ 1029 break; 1030 if (j == num_fmts) 1031 /* new */ 1032 isi_fmts[num_fmts++] = isi_formats + i; 1033 } 1034 mbus_code.index++; 1035 } 1036 1037 if (!num_fmts) 1038 return -ENXIO; 1039 1040 isi->num_user_formats = num_fmts; 1041 isi->user_formats = devm_kcalloc(isi->dev, 1042 num_fmts, sizeof(struct isi_format *), 1043 GFP_KERNEL); 1044 if (!isi->user_formats) { 1045 dev_err(isi->dev, "could not allocate memory\n"); 1046 return -ENOMEM; 1047 } 1048 1049 memcpy(isi->user_formats, isi_fmts, 1050 num_fmts * sizeof(struct isi_format *)); 1051 isi->current_fmt = isi->user_formats[0]; 1052 1053 return 0; 1054 } 1055 1056 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1057 { 1058 struct atmel_isi *isi = notifier_to_isi(notifier); 1059 int ret; 1060 1061 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1062 ret = isi_formats_init(isi); 1063 if (ret) { 1064 dev_err(isi->dev, "No supported mediabus format found\n"); 1065 return ret; 1066 } 1067 isi_camera_set_bus_param(isi); 1068 1069 ret = isi_set_default_fmt(isi); 1070 if (ret) { 1071 dev_err(isi->dev, "Could not set default format\n"); 1072 return ret; 1073 } 1074 1075 ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1); 1076 if (ret) { 1077 dev_err(isi->dev, "Failed to register video device\n"); 1078 return ret; 1079 } 1080 1081 dev_dbg(isi->dev, "Device registered as %s\n", 1082 video_device_node_name(isi->vdev)); 1083 return 0; 1084 } 1085 1086 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1087 struct v4l2_subdev *sd, 1088 struct v4l2_async_subdev *asd) 1089 { 1090 struct atmel_isi *isi = notifier_to_isi(notifier); 1091 1092 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1093 1094 /* Checks internaly if vdev have been init or not */ 1095 video_unregister_device(isi->vdev); 1096 } 1097 1098 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1099 struct v4l2_subdev *subdev, 1100 struct v4l2_async_subdev *asd) 1101 { 1102 struct atmel_isi *isi = notifier_to_isi(notifier); 1103 1104 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1105 1106 isi->entity.subdev = subdev; 1107 1108 return 0; 1109 } 1110 1111 static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node) 1112 { 1113 struct device_node *ep = NULL; 1114 struct device_node *remote; 1115 1116 while (1) { 1117 ep = of_graph_get_next_endpoint(node, ep); 1118 if (!ep) 1119 return -EINVAL; 1120 1121 remote = of_graph_get_remote_port_parent(ep); 1122 if (!remote) { 1123 of_node_put(ep); 1124 return -EINVAL; 1125 } 1126 1127 /* Remote node to connect */ 1128 isi->entity.node = remote; 1129 isi->entity.asd.match_type = V4L2_ASYNC_MATCH_OF; 1130 isi->entity.asd.match.of.node = remote; 1131 return 0; 1132 } 1133 } 1134 1135 static int isi_graph_init(struct atmel_isi *isi) 1136 { 1137 struct v4l2_async_subdev **subdevs = NULL; 1138 int ret; 1139 1140 /* Parse the graph to extract a list of subdevice DT nodes. */ 1141 ret = isi_graph_parse(isi, isi->dev->of_node); 1142 if (ret < 0) { 1143 dev_err(isi->dev, "Graph parsing failed\n"); 1144 return ret; 1145 } 1146 1147 /* Register the subdevices notifier. */ 1148 subdevs = devm_kzalloc(isi->dev, sizeof(*subdevs), GFP_KERNEL); 1149 if (subdevs == NULL) { 1150 of_node_put(isi->entity.node); 1151 return -ENOMEM; 1152 } 1153 1154 subdevs[0] = &isi->entity.asd; 1155 1156 isi->notifier.subdevs = subdevs; 1157 isi->notifier.num_subdevs = 1; 1158 isi->notifier.bound = isi_graph_notify_bound; 1159 isi->notifier.unbind = isi_graph_notify_unbind; 1160 isi->notifier.complete = isi_graph_notify_complete; 1161 1162 ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier); 1163 if (ret < 0) { 1164 dev_err(isi->dev, "Notifier registration failed\n"); 1165 of_node_put(isi->entity.node); 1166 return ret; 1167 } 1168 1169 return 0; 1170 } 1171 1172 1173 static int atmel_isi_probe(struct platform_device *pdev) 1174 { 1175 int irq; 1176 struct atmel_isi *isi; 1177 struct vb2_queue *q; 1178 struct resource *regs; 1179 int ret, i; 1180 1181 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1182 if (!isi) { 1183 dev_err(&pdev->dev, "Can't allocate interface!\n"); 1184 return -ENOMEM; 1185 } 1186 1187 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1188 if (IS_ERR(isi->pclk)) 1189 return PTR_ERR(isi->pclk); 1190 1191 ret = atmel_isi_parse_dt(isi, pdev); 1192 if (ret) 1193 return ret; 1194 1195 isi->active = NULL; 1196 isi->dev = &pdev->dev; 1197 mutex_init(&isi->lock); 1198 spin_lock_init(&isi->irqlock); 1199 INIT_LIST_HEAD(&isi->video_buffer_list); 1200 INIT_LIST_HEAD(&isi->dma_desc_head); 1201 1202 q = &isi->queue; 1203 1204 /* Initialize the top-level structure */ 1205 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1206 if (ret) 1207 return ret; 1208 1209 isi->vdev = video_device_alloc(); 1210 if (isi->vdev == NULL) { 1211 ret = -ENOMEM; 1212 goto err_vdev_alloc; 1213 } 1214 1215 /* video node */ 1216 isi->vdev->fops = &isi_fops; 1217 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1218 isi->vdev->queue = &isi->queue; 1219 strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1220 isi->vdev->release = video_device_release; 1221 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1222 isi->vdev->lock = &isi->lock; 1223 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1224 V4L2_CAP_READWRITE; 1225 video_set_drvdata(isi->vdev, isi); 1226 1227 /* buffer queue */ 1228 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1229 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1230 q->lock = &isi->lock; 1231 q->drv_priv = isi; 1232 q->buf_struct_size = sizeof(struct frame_buffer); 1233 q->ops = &isi_video_qops; 1234 q->mem_ops = &vb2_dma_contig_memops; 1235 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1236 q->min_buffers_needed = 2; 1237 q->dev = &pdev->dev; 1238 1239 ret = vb2_queue_init(q); 1240 if (ret < 0) { 1241 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1242 goto err_vb2_queue; 1243 } 1244 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1245 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1246 &isi->fb_descriptors_phys, 1247 GFP_KERNEL); 1248 if (!isi->p_fb_descriptors) { 1249 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1250 ret = -ENOMEM; 1251 goto err_dma_alloc; 1252 } 1253 1254 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1255 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1256 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1257 i * sizeof(struct fbd); 1258 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1259 } 1260 1261 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1262 isi->regs = devm_ioremap_resource(&pdev->dev, regs); 1263 if (IS_ERR(isi->regs)) { 1264 ret = PTR_ERR(isi->regs); 1265 goto err_ioremap; 1266 } 1267 1268 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1269 isi->width_flags = 1 << 7; 1270 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1271 isi->width_flags |= 1 << 9; 1272 1273 irq = platform_get_irq(pdev, 0); 1274 if (irq < 0) { 1275 ret = irq; 1276 goto err_req_irq; 1277 } 1278 1279 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1280 if (ret) { 1281 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1282 goto err_req_irq; 1283 } 1284 isi->irq = irq; 1285 1286 ret = isi_graph_init(isi); 1287 if (ret < 0) 1288 goto err_req_irq; 1289 1290 pm_suspend_ignore_children(&pdev->dev, true); 1291 pm_runtime_enable(&pdev->dev); 1292 platform_set_drvdata(pdev, isi); 1293 return 0; 1294 1295 err_req_irq: 1296 err_ioremap: 1297 dma_free_coherent(&pdev->dev, 1298 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1299 isi->p_fb_descriptors, 1300 isi->fb_descriptors_phys); 1301 err_dma_alloc: 1302 err_vb2_queue: 1303 video_device_release(isi->vdev); 1304 err_vdev_alloc: 1305 v4l2_device_unregister(&isi->v4l2_dev); 1306 1307 return ret; 1308 } 1309 1310 static int atmel_isi_remove(struct platform_device *pdev) 1311 { 1312 struct atmel_isi *isi = platform_get_drvdata(pdev); 1313 1314 dma_free_coherent(&pdev->dev, 1315 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1316 isi->p_fb_descriptors, 1317 isi->fb_descriptors_phys); 1318 pm_runtime_disable(&pdev->dev); 1319 v4l2_async_notifier_unregister(&isi->notifier); 1320 v4l2_device_unregister(&isi->v4l2_dev); 1321 1322 return 0; 1323 } 1324 1325 #ifdef CONFIG_PM 1326 static int atmel_isi_runtime_suspend(struct device *dev) 1327 { 1328 struct atmel_isi *isi = dev_get_drvdata(dev); 1329 1330 clk_disable_unprepare(isi->pclk); 1331 1332 return 0; 1333 } 1334 static int atmel_isi_runtime_resume(struct device *dev) 1335 { 1336 struct atmel_isi *isi = dev_get_drvdata(dev); 1337 1338 return clk_prepare_enable(isi->pclk); 1339 } 1340 #endif /* CONFIG_PM */ 1341 1342 static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1343 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1344 atmel_isi_runtime_resume, NULL) 1345 }; 1346 1347 static const struct of_device_id atmel_isi_of_match[] = { 1348 { .compatible = "atmel,at91sam9g45-isi" }, 1349 { } 1350 }; 1351 MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1352 1353 static struct platform_driver atmel_isi_driver = { 1354 .driver = { 1355 .name = "atmel_isi", 1356 .of_match_table = of_match_ptr(atmel_isi_of_match), 1357 .pm = &atmel_isi_dev_pm_ops, 1358 }, 1359 .probe = atmel_isi_probe, 1360 .remove = atmel_isi_remove, 1361 }; 1362 1363 module_platform_driver(atmel_isi_driver); 1364 1365 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1366 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1367 MODULE_LICENSE("GPL"); 1368 MODULE_SUPPORTED_DEVICE("video"); 1369