1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2011 Atmel Corporation 4 * Josh Wu, <josh.wu@atmel.com> 5 * 6 * Based on previous work by Lars Haring, <lars.haring@atmel.com> 7 * and Sedji Gaouaou 8 * Based on the bttv driver for Bt848 with respective copyright holders 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/completion.h> 13 #include <linux/delay.h> 14 #include <linux/fs.h> 15 #include <linux/init.h> 16 #include <linux/interrupt.h> 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/of_graph.h> 20 #include <linux/platform_device.h> 21 #include <linux/pm_runtime.h> 22 #include <linux/slab.h> 23 #include <linux/of.h> 24 25 #include <linux/videodev2.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-device.h> 28 #include <media/v4l2-dev.h> 29 #include <media/v4l2-ioctl.h> 30 #include <media/v4l2-event.h> 31 #include <media/v4l2-fwnode.h> 32 #include <media/videobuf2-dma-contig.h> 33 #include <media/v4l2-image-sizes.h> 34 35 #include "atmel-isi.h" 36 37 #define MAX_SUPPORT_WIDTH 2048U 38 #define MAX_SUPPORT_HEIGHT 2048U 39 #define MIN_FRAME_RATE 15 40 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE) 41 42 /* Frame buffer descriptor */ 43 struct fbd { 44 /* Physical address of the frame buffer */ 45 u32 fb_address; 46 /* DMA Control Register(only in HISI2) */ 47 u32 dma_ctrl; 48 /* Physical address of the next fbd */ 49 u32 next_fbd_address; 50 }; 51 52 static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl) 53 { 54 fb_desc->dma_ctrl = ctrl; 55 } 56 57 struct isi_dma_desc { 58 struct list_head list; 59 struct fbd *p_fbd; 60 dma_addr_t fbd_phys; 61 }; 62 63 /* Frame buffer data */ 64 struct frame_buffer { 65 struct vb2_v4l2_buffer vb; 66 struct isi_dma_desc *p_dma_desc; 67 struct list_head list; 68 }; 69 70 struct isi_graph_entity { 71 struct device_node *node; 72 73 struct v4l2_async_subdev asd; 74 struct v4l2_subdev *subdev; 75 }; 76 77 /* 78 * struct isi_format - ISI media bus format information 79 * @fourcc: Fourcc code for this format 80 * @mbus_code: V4L2 media bus format code. 81 * @bpp: Bytes per pixel (when stored in memory) 82 * @swap: Byte swap configuration value 83 * @support: Indicates format supported by subdev 84 * @skip: Skip duplicate format supported by subdev 85 */ 86 struct isi_format { 87 u32 fourcc; 88 u32 mbus_code; 89 u8 bpp; 90 u32 swap; 91 }; 92 93 94 struct atmel_isi { 95 /* Protects the access of variables shared with the ISR */ 96 spinlock_t irqlock; 97 struct device *dev; 98 void __iomem *regs; 99 100 int sequence; 101 102 /* Allocate descriptors for dma buffer use */ 103 struct fbd *p_fb_descriptors; 104 dma_addr_t fb_descriptors_phys; 105 struct list_head dma_desc_head; 106 struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME]; 107 bool enable_preview_path; 108 109 struct completion complete; 110 /* ISI peripheral clock */ 111 struct clk *pclk; 112 unsigned int irq; 113 114 struct isi_platform_data pdata; 115 u16 width_flags; /* max 12 bits */ 116 117 struct list_head video_buffer_list; 118 struct frame_buffer *active; 119 120 struct v4l2_device v4l2_dev; 121 struct video_device *vdev; 122 struct v4l2_async_notifier notifier; 123 struct isi_graph_entity entity; 124 struct v4l2_format fmt; 125 126 const struct isi_format **user_formats; 127 unsigned int num_user_formats; 128 const struct isi_format *current_fmt; 129 130 struct mutex lock; 131 struct vb2_queue queue; 132 }; 133 134 #define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier) 135 136 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) 137 { 138 writel(val, isi->regs + reg); 139 } 140 static u32 isi_readl(struct atmel_isi *isi, u32 reg) 141 { 142 return readl(isi->regs + reg); 143 } 144 145 static void configure_geometry(struct atmel_isi *isi) 146 { 147 u32 cfg2, psize; 148 u32 fourcc = isi->current_fmt->fourcc; 149 150 isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 || 151 fourcc == V4L2_PIX_FMT_RGB32; 152 153 /* According to sensor's output format to set cfg2 */ 154 cfg2 = isi->current_fmt->swap; 155 156 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 157 /* Set width */ 158 cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) & 159 ISI_CFG2_IM_HSIZE_MASK; 160 /* Set height */ 161 cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET) 162 & ISI_CFG2_IM_VSIZE_MASK; 163 isi_writel(isi, ISI_CFG2, cfg2); 164 165 /* No down sampling, preview size equal to sensor output size */ 166 psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) & 167 ISI_PSIZE_PREV_HSIZE_MASK; 168 psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) & 169 ISI_PSIZE_PREV_VSIZE_MASK; 170 isi_writel(isi, ISI_PSIZE, psize); 171 isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING); 172 } 173 174 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi) 175 { 176 if (isi->active) { 177 struct vb2_v4l2_buffer *vbuf = &isi->active->vb; 178 struct frame_buffer *buf = isi->active; 179 180 list_del_init(&buf->list); 181 vbuf->vb2_buf.timestamp = ktime_get_ns(); 182 vbuf->sequence = isi->sequence++; 183 vbuf->field = V4L2_FIELD_NONE; 184 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE); 185 } 186 187 if (list_empty(&isi->video_buffer_list)) { 188 isi->active = NULL; 189 } else { 190 /* start next dma frame. */ 191 isi->active = list_entry(isi->video_buffer_list.next, 192 struct frame_buffer, list); 193 if (!isi->enable_preview_path) { 194 isi_writel(isi, ISI_DMA_C_DSCR, 195 (u32)isi->active->p_dma_desc->fbd_phys); 196 isi_writel(isi, ISI_DMA_C_CTRL, 197 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 198 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 199 } else { 200 isi_writel(isi, ISI_DMA_P_DSCR, 201 (u32)isi->active->p_dma_desc->fbd_phys); 202 isi_writel(isi, ISI_DMA_P_CTRL, 203 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 204 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 205 } 206 } 207 return IRQ_HANDLED; 208 } 209 210 /* ISI interrupt service routine */ 211 static irqreturn_t isi_interrupt(int irq, void *dev_id) 212 { 213 struct atmel_isi *isi = dev_id; 214 u32 status, mask, pending; 215 irqreturn_t ret = IRQ_NONE; 216 217 spin_lock(&isi->irqlock); 218 219 status = isi_readl(isi, ISI_STATUS); 220 mask = isi_readl(isi, ISI_INTMASK); 221 pending = status & mask; 222 223 if (pending & ISI_CTRL_SRST) { 224 complete(&isi->complete); 225 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST); 226 ret = IRQ_HANDLED; 227 } else if (pending & ISI_CTRL_DIS) { 228 complete(&isi->complete); 229 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS); 230 ret = IRQ_HANDLED; 231 } else { 232 if (likely(pending & ISI_SR_CXFR_DONE) || 233 likely(pending & ISI_SR_PXFR_DONE)) 234 ret = atmel_isi_handle_streaming(isi); 235 } 236 237 spin_unlock(&isi->irqlock); 238 return ret; 239 } 240 241 #define WAIT_ISI_RESET 1 242 #define WAIT_ISI_DISABLE 0 243 static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset) 244 { 245 unsigned long timeout; 246 /* 247 * The reset or disable will only succeed if we have a 248 * pixel clock from the camera. 249 */ 250 init_completion(&isi->complete); 251 252 if (wait_reset) { 253 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST); 254 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST); 255 } else { 256 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS); 257 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 258 } 259 260 timeout = wait_for_completion_timeout(&isi->complete, 261 msecs_to_jiffies(500)); 262 if (timeout == 0) 263 return -ETIMEDOUT; 264 265 return 0; 266 } 267 268 /* ------------------------------------------------------------------ 269 Videobuf operations 270 ------------------------------------------------------------------*/ 271 static int queue_setup(struct vb2_queue *vq, 272 unsigned int *nbuffers, unsigned int *nplanes, 273 unsigned int sizes[], struct device *alloc_devs[]) 274 { 275 struct atmel_isi *isi = vb2_get_drv_priv(vq); 276 unsigned long size; 277 278 size = isi->fmt.fmt.pix.sizeimage; 279 280 /* Make sure the image size is large enough. */ 281 if (*nplanes) 282 return sizes[0] < size ? -EINVAL : 0; 283 284 *nplanes = 1; 285 sizes[0] = size; 286 287 isi->active = NULL; 288 289 dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__, 290 *nbuffers, size); 291 292 return 0; 293 } 294 295 static int buffer_init(struct vb2_buffer *vb) 296 { 297 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 298 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 299 300 buf->p_dma_desc = NULL; 301 INIT_LIST_HEAD(&buf->list); 302 303 return 0; 304 } 305 306 static int buffer_prepare(struct vb2_buffer *vb) 307 { 308 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 309 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 310 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 311 unsigned long size; 312 struct isi_dma_desc *desc; 313 314 size = isi->fmt.fmt.pix.sizeimage; 315 316 if (vb2_plane_size(vb, 0) < size) { 317 dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n", 318 __func__, vb2_plane_size(vb, 0), size); 319 return -EINVAL; 320 } 321 322 vb2_set_plane_payload(vb, 0, size); 323 324 if (!buf->p_dma_desc) { 325 if (list_empty(&isi->dma_desc_head)) { 326 dev_err(isi->dev, "Not enough dma descriptors.\n"); 327 return -EINVAL; 328 } else { 329 /* Get an available descriptor */ 330 desc = list_entry(isi->dma_desc_head.next, 331 struct isi_dma_desc, list); 332 /* Delete the descriptor since now it is used */ 333 list_del_init(&desc->list); 334 335 /* Initialize the dma descriptor */ 336 desc->p_fbd->fb_address = 337 vb2_dma_contig_plane_dma_addr(vb, 0); 338 desc->p_fbd->next_fbd_address = 0; 339 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB); 340 341 buf->p_dma_desc = desc; 342 } 343 } 344 return 0; 345 } 346 347 static void buffer_cleanup(struct vb2_buffer *vb) 348 { 349 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 350 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 351 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 352 353 /* This descriptor is available now and we add to head list */ 354 if (buf->p_dma_desc) 355 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head); 356 } 357 358 static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer) 359 { 360 u32 ctrl, cfg1; 361 362 cfg1 = isi_readl(isi, ISI_CFG1); 363 /* Enable irq: cxfr for the codec path, pxfr for the preview path */ 364 isi_writel(isi, ISI_INTEN, 365 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 366 367 /* Check if already in a frame */ 368 if (!isi->enable_preview_path) { 369 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) { 370 dev_err(isi->dev, "Already in frame handling.\n"); 371 return; 372 } 373 374 isi_writel(isi, ISI_DMA_C_DSCR, 375 (u32)buffer->p_dma_desc->fbd_phys); 376 isi_writel(isi, ISI_DMA_C_CTRL, 377 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 378 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 379 } else { 380 isi_writel(isi, ISI_DMA_P_DSCR, 381 (u32)buffer->p_dma_desc->fbd_phys); 382 isi_writel(isi, ISI_DMA_P_CTRL, 383 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 384 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 385 } 386 387 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK; 388 /* Enable linked list */ 389 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR; 390 391 /* Enable ISI */ 392 ctrl = ISI_CTRL_EN; 393 394 if (!isi->enable_preview_path) 395 ctrl |= ISI_CTRL_CDC; 396 397 isi_writel(isi, ISI_CTRL, ctrl); 398 isi_writel(isi, ISI_CFG1, cfg1); 399 } 400 401 static void buffer_queue(struct vb2_buffer *vb) 402 { 403 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 404 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 405 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 406 unsigned long flags = 0; 407 408 spin_lock_irqsave(&isi->irqlock, flags); 409 list_add_tail(&buf->list, &isi->video_buffer_list); 410 411 if (!isi->active) { 412 isi->active = buf; 413 if (vb2_is_streaming(vb->vb2_queue)) 414 start_dma(isi, buf); 415 } 416 spin_unlock_irqrestore(&isi->irqlock, flags); 417 } 418 419 static int start_streaming(struct vb2_queue *vq, unsigned int count) 420 { 421 struct atmel_isi *isi = vb2_get_drv_priv(vq); 422 struct frame_buffer *buf, *node; 423 int ret; 424 425 pm_runtime_get_sync(isi->dev); 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 /* Reset ISI */ 435 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); 436 if (ret < 0) { 437 dev_err(isi->dev, "Reset ISI timed out\n"); 438 goto err_reset; 439 } 440 /* Disable all interrupts */ 441 isi_writel(isi, ISI_INTDIS, (u32)~0UL); 442 443 isi->sequence = 0; 444 configure_geometry(isi); 445 446 spin_lock_irq(&isi->irqlock); 447 /* Clear any pending interrupt */ 448 isi_readl(isi, ISI_STATUS); 449 450 start_dma(isi, isi->active); 451 spin_unlock_irq(&isi->irqlock); 452 453 return 0; 454 455 err_reset: 456 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 457 458 err_start_stream: 459 pm_runtime_put(isi->dev); 460 461 spin_lock_irq(&isi->irqlock); 462 isi->active = NULL; 463 /* Release all active buffers */ 464 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 465 list_del_init(&buf->list); 466 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); 467 } 468 spin_unlock_irq(&isi->irqlock); 469 470 return ret; 471 } 472 473 /* abort streaming and wait for last buffer */ 474 static void stop_streaming(struct vb2_queue *vq) 475 { 476 struct atmel_isi *isi = vb2_get_drv_priv(vq); 477 struct frame_buffer *buf, *node; 478 int ret = 0; 479 unsigned long timeout; 480 481 /* Disable stream on the sub device */ 482 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 483 if (ret && ret != -ENOIOCTLCMD) 484 dev_err(isi->dev, "stream off failed in subdev\n"); 485 486 spin_lock_irq(&isi->irqlock); 487 isi->active = NULL; 488 /* Release all active buffers */ 489 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 490 list_del_init(&buf->list); 491 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 492 } 493 spin_unlock_irq(&isi->irqlock); 494 495 if (!isi->enable_preview_path) { 496 timeout = jiffies + (FRAME_INTERVAL_MILLI_SEC * HZ) / 1000; 497 /* Wait until the end of the current frame. */ 498 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) && 499 time_before(jiffies, timeout)) 500 msleep(1); 501 502 if (time_after(jiffies, timeout)) 503 dev_err(isi->dev, 504 "Timeout waiting for finishing codec request\n"); 505 } 506 507 /* Disable interrupts */ 508 isi_writel(isi, ISI_INTDIS, 509 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 510 511 /* Disable ISI and wait for it is done */ 512 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE); 513 if (ret < 0) 514 dev_err(isi->dev, "Disable ISI timed out\n"); 515 516 pm_runtime_put(isi->dev); 517 } 518 519 static const struct vb2_ops isi_video_qops = { 520 .queue_setup = queue_setup, 521 .buf_init = buffer_init, 522 .buf_prepare = buffer_prepare, 523 .buf_cleanup = buffer_cleanup, 524 .buf_queue = buffer_queue, 525 .start_streaming = start_streaming, 526 .stop_streaming = stop_streaming, 527 .wait_prepare = vb2_ops_wait_prepare, 528 .wait_finish = vb2_ops_wait_finish, 529 }; 530 531 static int isi_g_fmt_vid_cap(struct file *file, void *priv, 532 struct v4l2_format *fmt) 533 { 534 struct atmel_isi *isi = video_drvdata(file); 535 536 *fmt = isi->fmt; 537 538 return 0; 539 } 540 541 static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi, 542 unsigned int fourcc) 543 { 544 unsigned int num_formats = isi->num_user_formats; 545 const struct isi_format *fmt; 546 unsigned int i; 547 548 for (i = 0; i < num_formats; i++) { 549 fmt = isi->user_formats[i]; 550 if (fmt->fourcc == fourcc) 551 return fmt; 552 } 553 554 return NULL; 555 } 556 557 static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, 558 const struct isi_format **current_fmt) 559 { 560 const struct isi_format *isi_fmt; 561 struct v4l2_pix_format *pixfmt = &f->fmt.pix; 562 struct v4l2_subdev_pad_config pad_cfg; 563 struct v4l2_subdev_format format = { 564 .which = V4L2_SUBDEV_FORMAT_TRY, 565 }; 566 int ret; 567 568 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 569 if (!isi_fmt) { 570 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 571 pixfmt->pixelformat = isi_fmt->fourcc; 572 } 573 574 /* Limit to Atmel ISI hardware capabilities */ 575 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); 576 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); 577 578 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 579 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 580 &pad_cfg, &format); 581 if (ret < 0) 582 return ret; 583 584 v4l2_fill_pix_format(pixfmt, &format.format); 585 586 pixfmt->field = V4L2_FIELD_NONE; 587 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 588 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 589 590 if (current_fmt) 591 *current_fmt = isi_fmt; 592 593 return 0; 594 } 595 596 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 597 { 598 struct v4l2_subdev_format format = { 599 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 600 }; 601 const struct isi_format *current_fmt; 602 int ret; 603 604 ret = isi_try_fmt(isi, f, ¤t_fmt); 605 if (ret) 606 return ret; 607 608 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 609 current_fmt->mbus_code); 610 ret = v4l2_subdev_call(isi->entity.subdev, pad, 611 set_fmt, NULL, &format); 612 if (ret < 0) 613 return ret; 614 615 isi->fmt = *f; 616 isi->current_fmt = current_fmt; 617 618 return 0; 619 } 620 621 static int isi_s_fmt_vid_cap(struct file *file, void *priv, 622 struct v4l2_format *f) 623 { 624 struct atmel_isi *isi = video_drvdata(file); 625 626 if (vb2_is_streaming(&isi->queue)) 627 return -EBUSY; 628 629 return isi_set_fmt(isi, f); 630 } 631 632 static int isi_try_fmt_vid_cap(struct file *file, void *priv, 633 struct v4l2_format *f) 634 { 635 struct atmel_isi *isi = video_drvdata(file); 636 637 return isi_try_fmt(isi, f, NULL); 638 } 639 640 static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 641 struct v4l2_fmtdesc *f) 642 { 643 struct atmel_isi *isi = video_drvdata(file); 644 645 if (f->index >= isi->num_user_formats) 646 return -EINVAL; 647 648 f->pixelformat = isi->user_formats[f->index]->fourcc; 649 return 0; 650 } 651 652 static int isi_querycap(struct file *file, void *priv, 653 struct v4l2_capability *cap) 654 { 655 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 656 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 657 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 658 return 0; 659 } 660 661 static int isi_enum_input(struct file *file, void *priv, 662 struct v4l2_input *i) 663 { 664 if (i->index != 0) 665 return -EINVAL; 666 667 i->type = V4L2_INPUT_TYPE_CAMERA; 668 strscpy(i->name, "Camera", sizeof(i->name)); 669 return 0; 670 } 671 672 static int isi_g_input(struct file *file, void *priv, unsigned int *i) 673 { 674 *i = 0; 675 return 0; 676 } 677 678 static int isi_s_input(struct file *file, void *priv, unsigned int i) 679 { 680 if (i > 0) 681 return -EINVAL; 682 return 0; 683 } 684 685 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 686 { 687 struct atmel_isi *isi = video_drvdata(file); 688 689 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a); 690 } 691 692 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 693 { 694 struct atmel_isi *isi = video_drvdata(file); 695 696 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a); 697 } 698 699 static int isi_enum_framesizes(struct file *file, void *fh, 700 struct v4l2_frmsizeenum *fsize) 701 { 702 struct atmel_isi *isi = video_drvdata(file); 703 const struct isi_format *isi_fmt; 704 struct v4l2_subdev_frame_size_enum fse = { 705 .index = fsize->index, 706 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 707 }; 708 int ret; 709 710 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 711 if (!isi_fmt) 712 return -EINVAL; 713 714 fse.code = isi_fmt->mbus_code; 715 716 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 717 NULL, &fse); 718 if (ret) 719 return ret; 720 721 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 722 fsize->discrete.width = fse.max_width; 723 fsize->discrete.height = fse.max_height; 724 725 return 0; 726 } 727 728 static int isi_enum_frameintervals(struct file *file, void *fh, 729 struct v4l2_frmivalenum *fival) 730 { 731 struct atmel_isi *isi = video_drvdata(file); 732 const struct isi_format *isi_fmt; 733 struct v4l2_subdev_frame_interval_enum fie = { 734 .index = fival->index, 735 .width = fival->width, 736 .height = fival->height, 737 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 738 }; 739 int ret; 740 741 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 742 if (!isi_fmt) 743 return -EINVAL; 744 745 fie.code = isi_fmt->mbus_code; 746 747 ret = v4l2_subdev_call(isi->entity.subdev, pad, 748 enum_frame_interval, NULL, &fie); 749 if (ret) 750 return ret; 751 752 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 753 fival->discrete = fie.interval; 754 755 return 0; 756 } 757 758 static void isi_camera_set_bus_param(struct atmel_isi *isi) 759 { 760 u32 cfg1 = 0; 761 762 /* set bus param for ISI */ 763 if (isi->pdata.hsync_act_low) 764 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 765 if (isi->pdata.vsync_act_low) 766 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 767 if (isi->pdata.pclk_act_falling) 768 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 769 if (isi->pdata.has_emb_sync) 770 cfg1 |= ISI_CFG1_EMB_SYNC; 771 if (isi->pdata.full_mode) 772 cfg1 |= ISI_CFG1_FULL_MODE; 773 774 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 775 776 /* Enable PM and peripheral clock before operate isi registers */ 777 pm_runtime_get_sync(isi->dev); 778 779 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 780 isi_writel(isi, ISI_CFG1, cfg1); 781 782 pm_runtime_put(isi->dev); 783 } 784 785 /* -----------------------------------------------------------------------*/ 786 static int atmel_isi_parse_dt(struct atmel_isi *isi, 787 struct platform_device *pdev) 788 { 789 struct device_node *np = pdev->dev.of_node; 790 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 }; 791 int err; 792 793 /* Default settings for ISI */ 794 isi->pdata.full_mode = 1; 795 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 796 797 np = of_graph_get_next_endpoint(np, NULL); 798 if (!np) { 799 dev_err(&pdev->dev, "Could not find the endpoint\n"); 800 return -EINVAL; 801 } 802 803 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep); 804 of_node_put(np); 805 if (err) { 806 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 807 return err; 808 } 809 810 switch (ep.bus.parallel.bus_width) { 811 case 8: 812 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 813 break; 814 case 10: 815 isi->pdata.data_width_flags = 816 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 817 break; 818 default: 819 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 820 ep.bus.parallel.bus_width); 821 return -EINVAL; 822 } 823 824 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 825 isi->pdata.hsync_act_low = true; 826 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 827 isi->pdata.vsync_act_low = true; 828 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 829 isi->pdata.pclk_act_falling = true; 830 831 if (ep.bus_type == V4L2_MBUS_BT656) 832 isi->pdata.has_emb_sync = true; 833 834 return 0; 835 } 836 837 static int isi_open(struct file *file) 838 { 839 struct atmel_isi *isi = video_drvdata(file); 840 struct v4l2_subdev *sd = isi->entity.subdev; 841 int ret; 842 843 if (mutex_lock_interruptible(&isi->lock)) 844 return -ERESTARTSYS; 845 846 ret = v4l2_fh_open(file); 847 if (ret < 0) 848 goto unlock; 849 850 if (!v4l2_fh_is_singular_file(file)) 851 goto fh_rel; 852 853 ret = v4l2_subdev_call(sd, core, s_power, 1); 854 if (ret < 0 && ret != -ENOIOCTLCMD) 855 goto fh_rel; 856 857 ret = isi_set_fmt(isi, &isi->fmt); 858 if (ret) 859 v4l2_subdev_call(sd, core, s_power, 0); 860 fh_rel: 861 if (ret) 862 v4l2_fh_release(file); 863 unlock: 864 mutex_unlock(&isi->lock); 865 return ret; 866 } 867 868 static int isi_release(struct file *file) 869 { 870 struct atmel_isi *isi = video_drvdata(file); 871 struct v4l2_subdev *sd = isi->entity.subdev; 872 bool fh_singular; 873 int ret; 874 875 mutex_lock(&isi->lock); 876 877 fh_singular = v4l2_fh_is_singular_file(file); 878 879 ret = _vb2_fop_release(file, NULL); 880 881 if (fh_singular) 882 v4l2_subdev_call(sd, core, s_power, 0); 883 884 mutex_unlock(&isi->lock); 885 886 return ret; 887 } 888 889 static const struct v4l2_ioctl_ops isi_ioctl_ops = { 890 .vidioc_querycap = isi_querycap, 891 892 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 893 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 894 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 895 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 896 897 .vidioc_enum_input = isi_enum_input, 898 .vidioc_g_input = isi_g_input, 899 .vidioc_s_input = isi_s_input, 900 901 .vidioc_g_parm = isi_g_parm, 902 .vidioc_s_parm = isi_s_parm, 903 .vidioc_enum_framesizes = isi_enum_framesizes, 904 .vidioc_enum_frameintervals = isi_enum_frameintervals, 905 906 .vidioc_reqbufs = vb2_ioctl_reqbufs, 907 .vidioc_create_bufs = vb2_ioctl_create_bufs, 908 .vidioc_querybuf = vb2_ioctl_querybuf, 909 .vidioc_qbuf = vb2_ioctl_qbuf, 910 .vidioc_dqbuf = vb2_ioctl_dqbuf, 911 .vidioc_expbuf = vb2_ioctl_expbuf, 912 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 913 .vidioc_streamon = vb2_ioctl_streamon, 914 .vidioc_streamoff = vb2_ioctl_streamoff, 915 916 .vidioc_log_status = v4l2_ctrl_log_status, 917 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 918 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 919 }; 920 921 static const struct v4l2_file_operations isi_fops = { 922 .owner = THIS_MODULE, 923 .unlocked_ioctl = video_ioctl2, 924 .open = isi_open, 925 .release = isi_release, 926 .poll = vb2_fop_poll, 927 .mmap = vb2_fop_mmap, 928 .read = vb2_fop_read, 929 }; 930 931 static int isi_set_default_fmt(struct atmel_isi *isi) 932 { 933 struct v4l2_format f = { 934 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 935 .fmt.pix = { 936 .width = VGA_WIDTH, 937 .height = VGA_HEIGHT, 938 .field = V4L2_FIELD_NONE, 939 .pixelformat = isi->user_formats[0]->fourcc, 940 }, 941 }; 942 int ret; 943 944 ret = isi_try_fmt(isi, &f, NULL); 945 if (ret) 946 return ret; 947 isi->current_fmt = isi->user_formats[0]; 948 isi->fmt = f; 949 return 0; 950 } 951 952 static const struct isi_format isi_formats[] = { 953 { 954 .fourcc = V4L2_PIX_FMT_YUYV, 955 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 956 .bpp = 2, 957 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 958 }, { 959 .fourcc = V4L2_PIX_FMT_YUYV, 960 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 961 .bpp = 2, 962 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 963 }, { 964 .fourcc = V4L2_PIX_FMT_YUYV, 965 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 966 .bpp = 2, 967 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 968 }, { 969 .fourcc = V4L2_PIX_FMT_YUYV, 970 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 971 .bpp = 2, 972 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 973 }, { 974 .fourcc = V4L2_PIX_FMT_RGB565, 975 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 976 .bpp = 2, 977 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 978 }, { 979 .fourcc = V4L2_PIX_FMT_RGB565, 980 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 981 .bpp = 2, 982 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 983 }, { 984 .fourcc = V4L2_PIX_FMT_RGB565, 985 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 986 .bpp = 2, 987 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 988 }, { 989 .fourcc = V4L2_PIX_FMT_RGB565, 990 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 991 .bpp = 2, 992 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 993 }, 994 }; 995 996 static int isi_formats_init(struct atmel_isi *isi) 997 { 998 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 999 unsigned int num_fmts = 0, i, j; 1000 struct v4l2_subdev *subdev = isi->entity.subdev; 1001 struct v4l2_subdev_mbus_code_enum mbus_code = { 1002 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1003 }; 1004 1005 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1006 NULL, &mbus_code)) { 1007 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1008 if (isi_formats[i].mbus_code != mbus_code.code) 1009 continue; 1010 1011 /* Code supported, have we got this fourcc yet? */ 1012 for (j = 0; j < num_fmts; j++) 1013 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1014 /* Already available */ 1015 break; 1016 if (j == num_fmts) 1017 /* new */ 1018 isi_fmts[num_fmts++] = isi_formats + i; 1019 } 1020 mbus_code.index++; 1021 } 1022 1023 if (!num_fmts) 1024 return -ENXIO; 1025 1026 isi->num_user_formats = num_fmts; 1027 isi->user_formats = devm_kcalloc(isi->dev, 1028 num_fmts, sizeof(struct isi_format *), 1029 GFP_KERNEL); 1030 if (!isi->user_formats) 1031 return -ENOMEM; 1032 1033 memcpy(isi->user_formats, isi_fmts, 1034 num_fmts * sizeof(struct isi_format *)); 1035 isi->current_fmt = isi->user_formats[0]; 1036 1037 return 0; 1038 } 1039 1040 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1041 { 1042 struct atmel_isi *isi = notifier_to_isi(notifier); 1043 int ret; 1044 1045 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1046 ret = isi_formats_init(isi); 1047 if (ret) { 1048 dev_err(isi->dev, "No supported mediabus format found\n"); 1049 return ret; 1050 } 1051 isi_camera_set_bus_param(isi); 1052 1053 ret = isi_set_default_fmt(isi); 1054 if (ret) { 1055 dev_err(isi->dev, "Could not set default format\n"); 1056 return ret; 1057 } 1058 1059 ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1); 1060 if (ret) { 1061 dev_err(isi->dev, "Failed to register video device\n"); 1062 return ret; 1063 } 1064 1065 dev_dbg(isi->dev, "Device registered as %s\n", 1066 video_device_node_name(isi->vdev)); 1067 return 0; 1068 } 1069 1070 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1071 struct v4l2_subdev *sd, 1072 struct v4l2_async_subdev *asd) 1073 { 1074 struct atmel_isi *isi = notifier_to_isi(notifier); 1075 1076 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1077 1078 /* Checks internally if vdev have been init or not */ 1079 video_unregister_device(isi->vdev); 1080 } 1081 1082 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1083 struct v4l2_subdev *subdev, 1084 struct v4l2_async_subdev *asd) 1085 { 1086 struct atmel_isi *isi = notifier_to_isi(notifier); 1087 1088 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1089 1090 isi->entity.subdev = subdev; 1091 1092 return 0; 1093 } 1094 1095 static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { 1096 .bound = isi_graph_notify_bound, 1097 .unbind = isi_graph_notify_unbind, 1098 .complete = isi_graph_notify_complete, 1099 }; 1100 1101 static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node) 1102 { 1103 struct device_node *ep = NULL; 1104 struct device_node *remote; 1105 1106 ep = of_graph_get_next_endpoint(node, ep); 1107 if (!ep) 1108 return -EINVAL; 1109 1110 remote = of_graph_get_remote_port_parent(ep); 1111 of_node_put(ep); 1112 if (!remote) 1113 return -EINVAL; 1114 1115 /* Remote node to connect */ 1116 isi->entity.node = remote; 1117 isi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; 1118 isi->entity.asd.match.fwnode = of_fwnode_handle(remote); 1119 return 0; 1120 } 1121 1122 static int isi_graph_init(struct atmel_isi *isi) 1123 { 1124 int ret; 1125 1126 /* Parse the graph to extract a list of subdevice DT nodes. */ 1127 ret = isi_graph_parse(isi, isi->dev->of_node); 1128 if (ret < 0) { 1129 dev_err(isi->dev, "Graph parsing failed\n"); 1130 return ret; 1131 } 1132 1133 v4l2_async_notifier_init(&isi->notifier); 1134 1135 ret = v4l2_async_notifier_add_subdev(&isi->notifier, &isi->entity.asd); 1136 if (ret) { 1137 of_node_put(isi->entity.node); 1138 return ret; 1139 } 1140 1141 isi->notifier.ops = &isi_graph_notify_ops; 1142 1143 ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier); 1144 if (ret < 0) { 1145 dev_err(isi->dev, "Notifier registration failed\n"); 1146 v4l2_async_notifier_cleanup(&isi->notifier); 1147 return ret; 1148 } 1149 1150 return 0; 1151 } 1152 1153 1154 static int atmel_isi_probe(struct platform_device *pdev) 1155 { 1156 int irq; 1157 struct atmel_isi *isi; 1158 struct vb2_queue *q; 1159 struct resource *regs; 1160 int ret, i; 1161 1162 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1163 if (!isi) 1164 return -ENOMEM; 1165 1166 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1167 if (IS_ERR(isi->pclk)) 1168 return PTR_ERR(isi->pclk); 1169 1170 ret = atmel_isi_parse_dt(isi, pdev); 1171 if (ret) 1172 return ret; 1173 1174 isi->active = NULL; 1175 isi->dev = &pdev->dev; 1176 mutex_init(&isi->lock); 1177 spin_lock_init(&isi->irqlock); 1178 INIT_LIST_HEAD(&isi->video_buffer_list); 1179 INIT_LIST_HEAD(&isi->dma_desc_head); 1180 1181 q = &isi->queue; 1182 1183 /* Initialize the top-level structure */ 1184 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1185 if (ret) 1186 return ret; 1187 1188 isi->vdev = video_device_alloc(); 1189 if (!isi->vdev) { 1190 ret = -ENOMEM; 1191 goto err_vdev_alloc; 1192 } 1193 1194 /* video node */ 1195 isi->vdev->fops = &isi_fops; 1196 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1197 isi->vdev->queue = &isi->queue; 1198 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1199 isi->vdev->release = video_device_release; 1200 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1201 isi->vdev->lock = &isi->lock; 1202 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1203 V4L2_CAP_READWRITE; 1204 video_set_drvdata(isi->vdev, isi); 1205 1206 /* buffer queue */ 1207 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1208 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1209 q->lock = &isi->lock; 1210 q->drv_priv = isi; 1211 q->buf_struct_size = sizeof(struct frame_buffer); 1212 q->ops = &isi_video_qops; 1213 q->mem_ops = &vb2_dma_contig_memops; 1214 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1215 q->min_buffers_needed = 2; 1216 q->dev = &pdev->dev; 1217 1218 ret = vb2_queue_init(q); 1219 if (ret < 0) { 1220 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1221 goto err_vb2_queue; 1222 } 1223 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1224 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1225 &isi->fb_descriptors_phys, 1226 GFP_KERNEL); 1227 if (!isi->p_fb_descriptors) { 1228 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1229 ret = -ENOMEM; 1230 goto err_dma_alloc; 1231 } 1232 1233 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1234 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1235 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1236 i * sizeof(struct fbd); 1237 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1238 } 1239 1240 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1241 isi->regs = devm_ioremap_resource(&pdev->dev, regs); 1242 if (IS_ERR(isi->regs)) { 1243 ret = PTR_ERR(isi->regs); 1244 goto err_ioremap; 1245 } 1246 1247 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1248 isi->width_flags = 1 << 7; 1249 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1250 isi->width_flags |= 1 << 9; 1251 1252 irq = platform_get_irq(pdev, 0); 1253 if (irq < 0) { 1254 ret = irq; 1255 goto err_req_irq; 1256 } 1257 1258 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1259 if (ret) { 1260 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1261 goto err_req_irq; 1262 } 1263 isi->irq = irq; 1264 1265 ret = isi_graph_init(isi); 1266 if (ret < 0) 1267 goto err_req_irq; 1268 1269 pm_suspend_ignore_children(&pdev->dev, true); 1270 pm_runtime_enable(&pdev->dev); 1271 platform_set_drvdata(pdev, isi); 1272 return 0; 1273 1274 err_req_irq: 1275 err_ioremap: 1276 dma_free_coherent(&pdev->dev, 1277 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1278 isi->p_fb_descriptors, 1279 isi->fb_descriptors_phys); 1280 err_dma_alloc: 1281 err_vb2_queue: 1282 video_device_release(isi->vdev); 1283 err_vdev_alloc: 1284 v4l2_device_unregister(&isi->v4l2_dev); 1285 1286 return ret; 1287 } 1288 1289 static int atmel_isi_remove(struct platform_device *pdev) 1290 { 1291 struct atmel_isi *isi = platform_get_drvdata(pdev); 1292 1293 dma_free_coherent(&pdev->dev, 1294 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1295 isi->p_fb_descriptors, 1296 isi->fb_descriptors_phys); 1297 pm_runtime_disable(&pdev->dev); 1298 v4l2_async_notifier_unregister(&isi->notifier); 1299 v4l2_async_notifier_cleanup(&isi->notifier); 1300 v4l2_device_unregister(&isi->v4l2_dev); 1301 1302 return 0; 1303 } 1304 1305 #ifdef CONFIG_PM 1306 static int atmel_isi_runtime_suspend(struct device *dev) 1307 { 1308 struct atmel_isi *isi = dev_get_drvdata(dev); 1309 1310 clk_disable_unprepare(isi->pclk); 1311 1312 return 0; 1313 } 1314 static int atmel_isi_runtime_resume(struct device *dev) 1315 { 1316 struct atmel_isi *isi = dev_get_drvdata(dev); 1317 1318 return clk_prepare_enable(isi->pclk); 1319 } 1320 #endif /* CONFIG_PM */ 1321 1322 static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1323 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1324 atmel_isi_runtime_resume, NULL) 1325 }; 1326 1327 static const struct of_device_id atmel_isi_of_match[] = { 1328 { .compatible = "atmel,at91sam9g45-isi" }, 1329 { } 1330 }; 1331 MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1332 1333 static struct platform_driver atmel_isi_driver = { 1334 .driver = { 1335 .name = "atmel_isi", 1336 .of_match_table = of_match_ptr(atmel_isi_of_match), 1337 .pm = &atmel_isi_dev_pm_ops, 1338 }, 1339 .probe = atmel_isi_probe, 1340 .remove = atmel_isi_remove, 1341 }; 1342 1343 module_platform_driver(atmel_isi_driver); 1344 1345 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1346 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1347 MODULE_LICENSE("GPL"); 1348 MODULE_SUPPORTED_DEVICE("video"); 1349