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/of_graph.h> 23 #include <linux/platform_device.h> 24 #include <linux/pm_runtime.h> 25 #include <linux/slab.h> 26 #include <linux/of.h> 27 28 #include <linux/videodev2.h> 29 #include <media/v4l2-ctrls.h> 30 #include <media/v4l2-device.h> 31 #include <media/v4l2-dev.h> 32 #include <media/v4l2-ioctl.h> 33 #include <media/v4l2-event.h> 34 #include <media/v4l2-fwnode.h> 35 #include <media/videobuf2-dma-contig.h> 36 #include <media/v4l2-image-sizes.h> 37 38 #include "atmel-isi.h" 39 40 #define MAX_SUPPORT_WIDTH 2048U 41 #define MAX_SUPPORT_HEIGHT 2048U 42 #define MIN_FRAME_RATE 15 43 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE) 44 45 /* Frame buffer descriptor */ 46 struct fbd { 47 /* Physical address of the frame buffer */ 48 u32 fb_address; 49 /* DMA Control Register(only in HISI2) */ 50 u32 dma_ctrl; 51 /* Physical address of the next fbd */ 52 u32 next_fbd_address; 53 }; 54 55 static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl) 56 { 57 fb_desc->dma_ctrl = ctrl; 58 } 59 60 struct isi_dma_desc { 61 struct list_head list; 62 struct fbd *p_fbd; 63 dma_addr_t fbd_phys; 64 }; 65 66 /* Frame buffer data */ 67 struct frame_buffer { 68 struct vb2_v4l2_buffer vb; 69 struct isi_dma_desc *p_dma_desc; 70 struct list_head list; 71 }; 72 73 struct isi_graph_entity { 74 struct device_node *node; 75 76 struct v4l2_async_subdev asd; 77 struct v4l2_subdev *subdev; 78 }; 79 80 /* 81 * struct isi_format - ISI media bus format information 82 * @fourcc: Fourcc code for this format 83 * @mbus_code: V4L2 media bus format code. 84 * @bpp: Bytes per pixel (when stored in memory) 85 * @swap: Byte swap configuration value 86 * @support: Indicates format supported by subdev 87 * @skip: Skip duplicate format supported by subdev 88 */ 89 struct isi_format { 90 u32 fourcc; 91 u32 mbus_code; 92 u8 bpp; 93 u32 swap; 94 }; 95 96 97 struct atmel_isi { 98 /* Protects the access of variables shared with the ISR */ 99 spinlock_t irqlock; 100 struct device *dev; 101 void __iomem *regs; 102 103 int sequence; 104 105 /* Allocate descriptors for dma buffer use */ 106 struct fbd *p_fb_descriptors; 107 dma_addr_t fb_descriptors_phys; 108 struct list_head dma_desc_head; 109 struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME]; 110 bool enable_preview_path; 111 112 struct completion complete; 113 /* ISI peripherial clock */ 114 struct clk *pclk; 115 unsigned int irq; 116 117 struct isi_platform_data pdata; 118 u16 width_flags; /* max 12 bits */ 119 120 struct list_head video_buffer_list; 121 struct frame_buffer *active; 122 123 struct v4l2_device v4l2_dev; 124 struct video_device *vdev; 125 struct v4l2_async_notifier notifier; 126 struct isi_graph_entity entity; 127 struct v4l2_format fmt; 128 129 const struct isi_format **user_formats; 130 unsigned int num_user_formats; 131 const struct isi_format *current_fmt; 132 133 struct mutex lock; 134 struct vb2_queue queue; 135 }; 136 137 #define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier) 138 139 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) 140 { 141 writel(val, isi->regs + reg); 142 } 143 static u32 isi_readl(struct atmel_isi *isi, u32 reg) 144 { 145 return readl(isi->regs + reg); 146 } 147 148 static void configure_geometry(struct atmel_isi *isi) 149 { 150 u32 cfg2, psize; 151 u32 fourcc = isi->current_fmt->fourcc; 152 153 isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 || 154 fourcc == V4L2_PIX_FMT_RGB32; 155 156 /* According to sensor's output format to set cfg2 */ 157 cfg2 = isi->current_fmt->swap; 158 159 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 160 /* Set width */ 161 cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) & 162 ISI_CFG2_IM_HSIZE_MASK; 163 /* Set height */ 164 cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET) 165 & ISI_CFG2_IM_VSIZE_MASK; 166 isi_writel(isi, ISI_CFG2, cfg2); 167 168 /* No down sampling, preview size equal to sensor output size */ 169 psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) & 170 ISI_PSIZE_PREV_HSIZE_MASK; 171 psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) & 172 ISI_PSIZE_PREV_VSIZE_MASK; 173 isi_writel(isi, ISI_PSIZE, psize); 174 isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING); 175 } 176 177 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi) 178 { 179 if (isi->active) { 180 struct vb2_v4l2_buffer *vbuf = &isi->active->vb; 181 struct frame_buffer *buf = isi->active; 182 183 list_del_init(&buf->list); 184 vbuf->vb2_buf.timestamp = ktime_get_ns(); 185 vbuf->sequence = isi->sequence++; 186 vbuf->field = V4L2_FIELD_NONE; 187 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE); 188 } 189 190 if (list_empty(&isi->video_buffer_list)) { 191 isi->active = NULL; 192 } else { 193 /* start next dma frame. */ 194 isi->active = list_entry(isi->video_buffer_list.next, 195 struct frame_buffer, list); 196 if (!isi->enable_preview_path) { 197 isi_writel(isi, ISI_DMA_C_DSCR, 198 (u32)isi->active->p_dma_desc->fbd_phys); 199 isi_writel(isi, ISI_DMA_C_CTRL, 200 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 201 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 202 } else { 203 isi_writel(isi, ISI_DMA_P_DSCR, 204 (u32)isi->active->p_dma_desc->fbd_phys); 205 isi_writel(isi, ISI_DMA_P_CTRL, 206 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 207 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 208 } 209 } 210 return IRQ_HANDLED; 211 } 212 213 /* ISI interrupt service routine */ 214 static irqreturn_t isi_interrupt(int irq, void *dev_id) 215 { 216 struct atmel_isi *isi = dev_id; 217 u32 status, mask, pending; 218 irqreturn_t ret = IRQ_NONE; 219 220 spin_lock(&isi->irqlock); 221 222 status = isi_readl(isi, ISI_STATUS); 223 mask = isi_readl(isi, ISI_INTMASK); 224 pending = status & mask; 225 226 if (pending & ISI_CTRL_SRST) { 227 complete(&isi->complete); 228 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST); 229 ret = IRQ_HANDLED; 230 } else if (pending & ISI_CTRL_DIS) { 231 complete(&isi->complete); 232 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS); 233 ret = IRQ_HANDLED; 234 } else { 235 if (likely(pending & ISI_SR_CXFR_DONE) || 236 likely(pending & ISI_SR_PXFR_DONE)) 237 ret = atmel_isi_handle_streaming(isi); 238 } 239 240 spin_unlock(&isi->irqlock); 241 return ret; 242 } 243 244 #define WAIT_ISI_RESET 1 245 #define WAIT_ISI_DISABLE 0 246 static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset) 247 { 248 unsigned long timeout; 249 /* 250 * The reset or disable will only succeed if we have a 251 * pixel clock from the camera. 252 */ 253 init_completion(&isi->complete); 254 255 if (wait_reset) { 256 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST); 257 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST); 258 } else { 259 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS); 260 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 261 } 262 263 timeout = wait_for_completion_timeout(&isi->complete, 264 msecs_to_jiffies(500)); 265 if (timeout == 0) 266 return -ETIMEDOUT; 267 268 return 0; 269 } 270 271 /* ------------------------------------------------------------------ 272 Videobuf operations 273 ------------------------------------------------------------------*/ 274 static int queue_setup(struct vb2_queue *vq, 275 unsigned int *nbuffers, unsigned int *nplanes, 276 unsigned int sizes[], struct device *alloc_devs[]) 277 { 278 struct atmel_isi *isi = vb2_get_drv_priv(vq); 279 unsigned long size; 280 281 size = isi->fmt.fmt.pix.sizeimage; 282 283 /* Make sure the image size is large enough. */ 284 if (*nplanes) 285 return sizes[0] < size ? -EINVAL : 0; 286 287 *nplanes = 1; 288 sizes[0] = size; 289 290 isi->active = NULL; 291 292 dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__, 293 *nbuffers, size); 294 295 return 0; 296 } 297 298 static int buffer_init(struct vb2_buffer *vb) 299 { 300 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 301 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 302 303 buf->p_dma_desc = NULL; 304 INIT_LIST_HEAD(&buf->list); 305 306 return 0; 307 } 308 309 static int buffer_prepare(struct vb2_buffer *vb) 310 { 311 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 312 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 313 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 314 unsigned long size; 315 struct isi_dma_desc *desc; 316 317 size = isi->fmt.fmt.pix.sizeimage; 318 319 if (vb2_plane_size(vb, 0) < size) { 320 dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n", 321 __func__, vb2_plane_size(vb, 0), size); 322 return -EINVAL; 323 } 324 325 vb2_set_plane_payload(vb, 0, size); 326 327 if (!buf->p_dma_desc) { 328 if (list_empty(&isi->dma_desc_head)) { 329 dev_err(isi->dev, "Not enough dma descriptors.\n"); 330 return -EINVAL; 331 } else { 332 /* Get an available descriptor */ 333 desc = list_entry(isi->dma_desc_head.next, 334 struct isi_dma_desc, list); 335 /* Delete the descriptor since now it is used */ 336 list_del_init(&desc->list); 337 338 /* Initialize the dma descriptor */ 339 desc->p_fbd->fb_address = 340 vb2_dma_contig_plane_dma_addr(vb, 0); 341 desc->p_fbd->next_fbd_address = 0; 342 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB); 343 344 buf->p_dma_desc = desc; 345 } 346 } 347 return 0; 348 } 349 350 static void buffer_cleanup(struct vb2_buffer *vb) 351 { 352 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 353 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 354 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 355 356 /* This descriptor is available now and we add to head list */ 357 if (buf->p_dma_desc) 358 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head); 359 } 360 361 static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer) 362 { 363 u32 ctrl, cfg1; 364 365 cfg1 = isi_readl(isi, ISI_CFG1); 366 /* Enable irq: cxfr for the codec path, pxfr for the preview path */ 367 isi_writel(isi, ISI_INTEN, 368 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 369 370 /* Check if already in a frame */ 371 if (!isi->enable_preview_path) { 372 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) { 373 dev_err(isi->dev, "Already in frame handling.\n"); 374 return; 375 } 376 377 isi_writel(isi, ISI_DMA_C_DSCR, 378 (u32)buffer->p_dma_desc->fbd_phys); 379 isi_writel(isi, ISI_DMA_C_CTRL, 380 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 381 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 382 } else { 383 isi_writel(isi, ISI_DMA_P_DSCR, 384 (u32)buffer->p_dma_desc->fbd_phys); 385 isi_writel(isi, ISI_DMA_P_CTRL, 386 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 387 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 388 } 389 390 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK; 391 /* Enable linked list */ 392 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR; 393 394 /* Enable ISI */ 395 ctrl = ISI_CTRL_EN; 396 397 if (!isi->enable_preview_path) 398 ctrl |= ISI_CTRL_CDC; 399 400 isi_writel(isi, ISI_CTRL, ctrl); 401 isi_writel(isi, ISI_CFG1, cfg1); 402 } 403 404 static void buffer_queue(struct vb2_buffer *vb) 405 { 406 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 407 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 408 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 409 unsigned long flags = 0; 410 411 spin_lock_irqsave(&isi->irqlock, flags); 412 list_add_tail(&buf->list, &isi->video_buffer_list); 413 414 if (!isi->active) { 415 isi->active = buf; 416 if (vb2_is_streaming(vb->vb2_queue)) 417 start_dma(isi, buf); 418 } 419 spin_unlock_irqrestore(&isi->irqlock, flags); 420 } 421 422 static int start_streaming(struct vb2_queue *vq, unsigned int count) 423 { 424 struct atmel_isi *isi = vb2_get_drv_priv(vq); 425 struct frame_buffer *buf, *node; 426 int ret; 427 428 pm_runtime_get_sync(isi->dev); 429 430 /* Enable stream on the sub device */ 431 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1); 432 if (ret && ret != -ENOIOCTLCMD) { 433 dev_err(isi->dev, "stream on failed in subdev\n"); 434 goto err_start_stream; 435 } 436 437 /* Reset ISI */ 438 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); 439 if (ret < 0) { 440 dev_err(isi->dev, "Reset ISI timed out\n"); 441 goto err_reset; 442 } 443 /* Disable all interrupts */ 444 isi_writel(isi, ISI_INTDIS, (u32)~0UL); 445 446 isi->sequence = 0; 447 configure_geometry(isi); 448 449 spin_lock_irq(&isi->irqlock); 450 /* Clear any pending interrupt */ 451 isi_readl(isi, ISI_STATUS); 452 453 start_dma(isi, isi->active); 454 spin_unlock_irq(&isi->irqlock); 455 456 return 0; 457 458 err_reset: 459 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 460 461 err_start_stream: 462 pm_runtime_put(isi->dev); 463 464 spin_lock_irq(&isi->irqlock); 465 isi->active = NULL; 466 /* Release all active buffers */ 467 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 468 list_del_init(&buf->list); 469 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); 470 } 471 spin_unlock_irq(&isi->irqlock); 472 473 return ret; 474 } 475 476 /* abort streaming and wait for last buffer */ 477 static void stop_streaming(struct vb2_queue *vq) 478 { 479 struct atmel_isi *isi = vb2_get_drv_priv(vq); 480 struct frame_buffer *buf, *node; 481 int ret = 0; 482 unsigned long timeout; 483 484 /* Disable stream on the sub device */ 485 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 486 if (ret && ret != -ENOIOCTLCMD) 487 dev_err(isi->dev, "stream off failed in subdev\n"); 488 489 spin_lock_irq(&isi->irqlock); 490 isi->active = NULL; 491 /* Release all active buffers */ 492 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 493 list_del_init(&buf->list); 494 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 495 } 496 spin_unlock_irq(&isi->irqlock); 497 498 if (!isi->enable_preview_path) { 499 timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ; 500 /* Wait until the end of the current frame. */ 501 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) && 502 time_before(jiffies, timeout)) 503 msleep(1); 504 505 if (time_after(jiffies, timeout)) 506 dev_err(isi->dev, 507 "Timeout waiting for finishing codec request\n"); 508 } 509 510 /* Disable interrupts */ 511 isi_writel(isi, ISI_INTDIS, 512 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 513 514 /* Disable ISI and wait for it is done */ 515 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE); 516 if (ret < 0) 517 dev_err(isi->dev, "Disable ISI timed out\n"); 518 519 pm_runtime_put(isi->dev); 520 } 521 522 static const struct vb2_ops isi_video_qops = { 523 .queue_setup = queue_setup, 524 .buf_init = buffer_init, 525 .buf_prepare = buffer_prepare, 526 .buf_cleanup = buffer_cleanup, 527 .buf_queue = buffer_queue, 528 .start_streaming = start_streaming, 529 .stop_streaming = stop_streaming, 530 .wait_prepare = vb2_ops_wait_prepare, 531 .wait_finish = vb2_ops_wait_finish, 532 }; 533 534 static int isi_g_fmt_vid_cap(struct file *file, void *priv, 535 struct v4l2_format *fmt) 536 { 537 struct atmel_isi *isi = video_drvdata(file); 538 539 *fmt = isi->fmt; 540 541 return 0; 542 } 543 544 static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi, 545 unsigned int fourcc) 546 { 547 unsigned int num_formats = isi->num_user_formats; 548 const struct isi_format *fmt; 549 unsigned int i; 550 551 for (i = 0; i < num_formats; i++) { 552 fmt = isi->user_formats[i]; 553 if (fmt->fourcc == fourcc) 554 return fmt; 555 } 556 557 return NULL; 558 } 559 560 static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, 561 const struct isi_format **current_fmt) 562 { 563 const struct isi_format *isi_fmt; 564 struct v4l2_pix_format *pixfmt = &f->fmt.pix; 565 struct v4l2_subdev_pad_config pad_cfg; 566 struct v4l2_subdev_format format = { 567 .which = V4L2_SUBDEV_FORMAT_TRY, 568 }; 569 int ret; 570 571 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 572 if (!isi_fmt) { 573 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 574 pixfmt->pixelformat = isi_fmt->fourcc; 575 } 576 577 /* Limit to Atmel ISI hardware capabilities */ 578 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); 579 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); 580 581 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 582 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 583 &pad_cfg, &format); 584 if (ret < 0) 585 return ret; 586 587 v4l2_fill_pix_format(pixfmt, &format.format); 588 589 pixfmt->field = V4L2_FIELD_NONE; 590 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 591 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 592 593 if (current_fmt) 594 *current_fmt = isi_fmt; 595 596 return 0; 597 } 598 599 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 600 { 601 struct v4l2_subdev_format format = { 602 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 603 }; 604 const struct isi_format *current_fmt; 605 int ret; 606 607 ret = isi_try_fmt(isi, f, ¤t_fmt); 608 if (ret) 609 return ret; 610 611 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 612 current_fmt->mbus_code); 613 ret = v4l2_subdev_call(isi->entity.subdev, pad, 614 set_fmt, NULL, &format); 615 if (ret < 0) 616 return ret; 617 618 isi->fmt = *f; 619 isi->current_fmt = current_fmt; 620 621 return 0; 622 } 623 624 static int isi_s_fmt_vid_cap(struct file *file, void *priv, 625 struct v4l2_format *f) 626 { 627 struct atmel_isi *isi = video_drvdata(file); 628 629 if (vb2_is_streaming(&isi->queue)) 630 return -EBUSY; 631 632 return isi_set_fmt(isi, f); 633 } 634 635 static int isi_try_fmt_vid_cap(struct file *file, void *priv, 636 struct v4l2_format *f) 637 { 638 struct atmel_isi *isi = video_drvdata(file); 639 640 return isi_try_fmt(isi, f, NULL); 641 } 642 643 static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 644 struct v4l2_fmtdesc *f) 645 { 646 struct atmel_isi *isi = video_drvdata(file); 647 648 if (f->index >= isi->num_user_formats) 649 return -EINVAL; 650 651 f->pixelformat = isi->user_formats[f->index]->fourcc; 652 return 0; 653 } 654 655 static int isi_querycap(struct file *file, void *priv, 656 struct v4l2_capability *cap) 657 { 658 strlcpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 659 strlcpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 660 strlcpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 661 return 0; 662 } 663 664 static int isi_enum_input(struct file *file, void *priv, 665 struct v4l2_input *i) 666 { 667 if (i->index != 0) 668 return -EINVAL; 669 670 i->type = V4L2_INPUT_TYPE_CAMERA; 671 strlcpy(i->name, "Camera", sizeof(i->name)); 672 return 0; 673 } 674 675 static int isi_g_input(struct file *file, void *priv, unsigned int *i) 676 { 677 *i = 0; 678 return 0; 679 } 680 681 static int isi_s_input(struct file *file, void *priv, unsigned int i) 682 { 683 if (i > 0) 684 return -EINVAL; 685 return 0; 686 } 687 688 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 689 { 690 struct atmel_isi *isi = video_drvdata(file); 691 692 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 693 return -EINVAL; 694 695 a->parm.capture.readbuffers = 2; 696 return v4l2_subdev_call(isi->entity.subdev, video, g_parm, a); 697 } 698 699 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 700 { 701 struct atmel_isi *isi = video_drvdata(file); 702 703 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 704 return -EINVAL; 705 706 a->parm.capture.readbuffers = 2; 707 return v4l2_subdev_call(isi->entity.subdev, video, s_parm, a); 708 } 709 710 static int isi_enum_framesizes(struct file *file, void *fh, 711 struct v4l2_frmsizeenum *fsize) 712 { 713 struct atmel_isi *isi = video_drvdata(file); 714 const struct isi_format *isi_fmt; 715 struct v4l2_subdev_frame_size_enum fse = { 716 .index = fsize->index, 717 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 718 }; 719 int ret; 720 721 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 722 if (!isi_fmt) 723 return -EINVAL; 724 725 fse.code = isi_fmt->mbus_code; 726 727 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 728 NULL, &fse); 729 if (ret) 730 return ret; 731 732 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 733 fsize->discrete.width = fse.max_width; 734 fsize->discrete.height = fse.max_height; 735 736 return 0; 737 } 738 739 static int isi_enum_frameintervals(struct file *file, void *fh, 740 struct v4l2_frmivalenum *fival) 741 { 742 struct atmel_isi *isi = video_drvdata(file); 743 const struct isi_format *isi_fmt; 744 struct v4l2_subdev_frame_interval_enum fie = { 745 .index = fival->index, 746 .width = fival->width, 747 .height = fival->height, 748 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 749 }; 750 int ret; 751 752 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 753 if (!isi_fmt) 754 return -EINVAL; 755 756 fie.code = isi_fmt->mbus_code; 757 758 ret = v4l2_subdev_call(isi->entity.subdev, pad, 759 enum_frame_interval, NULL, &fie); 760 if (ret) 761 return ret; 762 763 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 764 fival->discrete = fie.interval; 765 766 return 0; 767 } 768 769 static void isi_camera_set_bus_param(struct atmel_isi *isi) 770 { 771 u32 cfg1 = 0; 772 773 /* set bus param for ISI */ 774 if (isi->pdata.hsync_act_low) 775 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 776 if (isi->pdata.vsync_act_low) 777 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 778 if (isi->pdata.pclk_act_falling) 779 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 780 if (isi->pdata.has_emb_sync) 781 cfg1 |= ISI_CFG1_EMB_SYNC; 782 if (isi->pdata.full_mode) 783 cfg1 |= ISI_CFG1_FULL_MODE; 784 785 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 786 787 /* Enable PM and peripheral clock before operate isi registers */ 788 pm_runtime_get_sync(isi->dev); 789 790 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 791 isi_writel(isi, ISI_CFG1, cfg1); 792 793 pm_runtime_put(isi->dev); 794 } 795 796 /* -----------------------------------------------------------------------*/ 797 static int atmel_isi_parse_dt(struct atmel_isi *isi, 798 struct platform_device *pdev) 799 { 800 struct device_node *np = pdev->dev.of_node; 801 struct v4l2_fwnode_endpoint ep; 802 int err; 803 804 /* Default settings for ISI */ 805 isi->pdata.full_mode = 1; 806 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 807 808 np = of_graph_get_next_endpoint(np, NULL); 809 if (!np) { 810 dev_err(&pdev->dev, "Could not find the endpoint\n"); 811 return -EINVAL; 812 } 813 814 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep); 815 of_node_put(np); 816 if (err) { 817 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 818 return err; 819 } 820 821 switch (ep.bus.parallel.bus_width) { 822 case 8: 823 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 824 break; 825 case 10: 826 isi->pdata.data_width_flags = 827 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 828 break; 829 default: 830 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 831 ep.bus.parallel.bus_width); 832 return -EINVAL; 833 } 834 835 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 836 isi->pdata.hsync_act_low = true; 837 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 838 isi->pdata.vsync_act_low = true; 839 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 840 isi->pdata.pclk_act_falling = true; 841 842 if (ep.bus_type == V4L2_MBUS_BT656) 843 isi->pdata.has_emb_sync = true; 844 845 return 0; 846 } 847 848 static int isi_open(struct file *file) 849 { 850 struct atmel_isi *isi = video_drvdata(file); 851 struct v4l2_subdev *sd = isi->entity.subdev; 852 int ret; 853 854 if (mutex_lock_interruptible(&isi->lock)) 855 return -ERESTARTSYS; 856 857 ret = v4l2_fh_open(file); 858 if (ret < 0) 859 goto unlock; 860 861 if (!v4l2_fh_is_singular_file(file)) 862 goto fh_rel; 863 864 ret = v4l2_subdev_call(sd, core, s_power, 1); 865 if (ret < 0 && ret != -ENOIOCTLCMD) 866 goto fh_rel; 867 868 ret = isi_set_fmt(isi, &isi->fmt); 869 if (ret) 870 v4l2_subdev_call(sd, core, s_power, 0); 871 fh_rel: 872 if (ret) 873 v4l2_fh_release(file); 874 unlock: 875 mutex_unlock(&isi->lock); 876 return ret; 877 } 878 879 static int isi_release(struct file *file) 880 { 881 struct atmel_isi *isi = video_drvdata(file); 882 struct v4l2_subdev *sd = isi->entity.subdev; 883 bool fh_singular; 884 int ret; 885 886 mutex_lock(&isi->lock); 887 888 fh_singular = v4l2_fh_is_singular_file(file); 889 890 ret = _vb2_fop_release(file, NULL); 891 892 if (fh_singular) 893 v4l2_subdev_call(sd, core, s_power, 0); 894 895 mutex_unlock(&isi->lock); 896 897 return ret; 898 } 899 900 static const struct v4l2_ioctl_ops isi_ioctl_ops = { 901 .vidioc_querycap = isi_querycap, 902 903 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 904 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 905 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 906 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 907 908 .vidioc_enum_input = isi_enum_input, 909 .vidioc_g_input = isi_g_input, 910 .vidioc_s_input = isi_s_input, 911 912 .vidioc_g_parm = isi_g_parm, 913 .vidioc_s_parm = isi_s_parm, 914 .vidioc_enum_framesizes = isi_enum_framesizes, 915 .vidioc_enum_frameintervals = isi_enum_frameintervals, 916 917 .vidioc_reqbufs = vb2_ioctl_reqbufs, 918 .vidioc_create_bufs = vb2_ioctl_create_bufs, 919 .vidioc_querybuf = vb2_ioctl_querybuf, 920 .vidioc_qbuf = vb2_ioctl_qbuf, 921 .vidioc_dqbuf = vb2_ioctl_dqbuf, 922 .vidioc_expbuf = vb2_ioctl_expbuf, 923 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 924 .vidioc_streamon = vb2_ioctl_streamon, 925 .vidioc_streamoff = vb2_ioctl_streamoff, 926 927 .vidioc_log_status = v4l2_ctrl_log_status, 928 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 929 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 930 }; 931 932 static const struct v4l2_file_operations isi_fops = { 933 .owner = THIS_MODULE, 934 .unlocked_ioctl = video_ioctl2, 935 .open = isi_open, 936 .release = isi_release, 937 .poll = vb2_fop_poll, 938 .mmap = vb2_fop_mmap, 939 .read = vb2_fop_read, 940 }; 941 942 static int isi_set_default_fmt(struct atmel_isi *isi) 943 { 944 struct v4l2_format f = { 945 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 946 .fmt.pix = { 947 .width = VGA_WIDTH, 948 .height = VGA_HEIGHT, 949 .field = V4L2_FIELD_NONE, 950 .pixelformat = isi->user_formats[0]->fourcc, 951 }, 952 }; 953 int ret; 954 955 ret = isi_try_fmt(isi, &f, NULL); 956 if (ret) 957 return ret; 958 isi->current_fmt = isi->user_formats[0]; 959 isi->fmt = f; 960 return 0; 961 } 962 963 static const struct isi_format isi_formats[] = { 964 { 965 .fourcc = V4L2_PIX_FMT_YUYV, 966 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 967 .bpp = 2, 968 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 969 }, { 970 .fourcc = V4L2_PIX_FMT_YUYV, 971 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 972 .bpp = 2, 973 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 974 }, { 975 .fourcc = V4L2_PIX_FMT_YUYV, 976 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 977 .bpp = 2, 978 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 979 }, { 980 .fourcc = V4L2_PIX_FMT_YUYV, 981 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 982 .bpp = 2, 983 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 984 }, { 985 .fourcc = V4L2_PIX_FMT_RGB565, 986 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 987 .bpp = 2, 988 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 989 }, { 990 .fourcc = V4L2_PIX_FMT_RGB565, 991 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 992 .bpp = 2, 993 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 994 }, { 995 .fourcc = V4L2_PIX_FMT_RGB565, 996 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 997 .bpp = 2, 998 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 999 }, { 1000 .fourcc = V4L2_PIX_FMT_RGB565, 1001 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1002 .bpp = 2, 1003 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1004 }, 1005 }; 1006 1007 static int isi_formats_init(struct atmel_isi *isi) 1008 { 1009 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 1010 unsigned int num_fmts = 0, i, j; 1011 struct v4l2_subdev *subdev = isi->entity.subdev; 1012 struct v4l2_subdev_mbus_code_enum mbus_code = { 1013 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1014 }; 1015 1016 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1017 NULL, &mbus_code)) { 1018 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1019 if (isi_formats[i].mbus_code != mbus_code.code) 1020 continue; 1021 1022 /* Code supported, have we got this fourcc yet? */ 1023 for (j = 0; j < num_fmts; j++) 1024 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1025 /* Already available */ 1026 break; 1027 if (j == num_fmts) 1028 /* new */ 1029 isi_fmts[num_fmts++] = isi_formats + i; 1030 } 1031 mbus_code.index++; 1032 } 1033 1034 if (!num_fmts) 1035 return -ENXIO; 1036 1037 isi->num_user_formats = num_fmts; 1038 isi->user_formats = devm_kcalloc(isi->dev, 1039 num_fmts, sizeof(struct isi_format *), 1040 GFP_KERNEL); 1041 if (!isi->user_formats) 1042 return -ENOMEM; 1043 1044 memcpy(isi->user_formats, isi_fmts, 1045 num_fmts * sizeof(struct isi_format *)); 1046 isi->current_fmt = isi->user_formats[0]; 1047 1048 return 0; 1049 } 1050 1051 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1052 { 1053 struct atmel_isi *isi = notifier_to_isi(notifier); 1054 int ret; 1055 1056 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1057 ret = isi_formats_init(isi); 1058 if (ret) { 1059 dev_err(isi->dev, "No supported mediabus format found\n"); 1060 return ret; 1061 } 1062 isi_camera_set_bus_param(isi); 1063 1064 ret = isi_set_default_fmt(isi); 1065 if (ret) { 1066 dev_err(isi->dev, "Could not set default format\n"); 1067 return ret; 1068 } 1069 1070 ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1); 1071 if (ret) { 1072 dev_err(isi->dev, "Failed to register video device\n"); 1073 return ret; 1074 } 1075 1076 dev_dbg(isi->dev, "Device registered as %s\n", 1077 video_device_node_name(isi->vdev)); 1078 return 0; 1079 } 1080 1081 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1082 struct v4l2_subdev *sd, 1083 struct v4l2_async_subdev *asd) 1084 { 1085 struct atmel_isi *isi = notifier_to_isi(notifier); 1086 1087 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1088 1089 /* Checks internaly if vdev have been init or not */ 1090 video_unregister_device(isi->vdev); 1091 } 1092 1093 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1094 struct v4l2_subdev *subdev, 1095 struct v4l2_async_subdev *asd) 1096 { 1097 struct atmel_isi *isi = notifier_to_isi(notifier); 1098 1099 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1100 1101 isi->entity.subdev = subdev; 1102 1103 return 0; 1104 } 1105 1106 static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { 1107 .bound = isi_graph_notify_bound, 1108 .unbind = isi_graph_notify_unbind, 1109 .complete = isi_graph_notify_complete, 1110 }; 1111 1112 static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node) 1113 { 1114 struct device_node *ep = NULL; 1115 struct device_node *remote; 1116 1117 while (1) { 1118 ep = of_graph_get_next_endpoint(node, ep); 1119 if (!ep) 1120 return -EINVAL; 1121 1122 remote = of_graph_get_remote_port_parent(ep); 1123 if (!remote) { 1124 of_node_put(ep); 1125 return -EINVAL; 1126 } 1127 1128 /* Remote node to connect */ 1129 isi->entity.node = remote; 1130 isi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; 1131 isi->entity.asd.match.fwnode = of_fwnode_handle(remote); 1132 return 0; 1133 } 1134 } 1135 1136 static int isi_graph_init(struct atmel_isi *isi) 1137 { 1138 struct v4l2_async_subdev **subdevs = NULL; 1139 int ret; 1140 1141 /* Parse the graph to extract a list of subdevice DT nodes. */ 1142 ret = isi_graph_parse(isi, isi->dev->of_node); 1143 if (ret < 0) { 1144 dev_err(isi->dev, "Graph parsing failed\n"); 1145 return ret; 1146 } 1147 1148 /* Register the subdevices notifier. */ 1149 subdevs = devm_kzalloc(isi->dev, sizeof(*subdevs), GFP_KERNEL); 1150 if (!subdevs) { 1151 of_node_put(isi->entity.node); 1152 return -ENOMEM; 1153 } 1154 1155 subdevs[0] = &isi->entity.asd; 1156 1157 isi->notifier.subdevs = subdevs; 1158 isi->notifier.num_subdevs = 1; 1159 isi->notifier.ops = &isi_graph_notify_ops; 1160 1161 ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier); 1162 if (ret < 0) { 1163 dev_err(isi->dev, "Notifier registration failed\n"); 1164 of_node_put(isi->entity.node); 1165 return ret; 1166 } 1167 1168 return 0; 1169 } 1170 1171 1172 static int atmel_isi_probe(struct platform_device *pdev) 1173 { 1174 int irq; 1175 struct atmel_isi *isi; 1176 struct vb2_queue *q; 1177 struct resource *regs; 1178 int ret, i; 1179 1180 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1181 if (!isi) 1182 return -ENOMEM; 1183 1184 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1185 if (IS_ERR(isi->pclk)) 1186 return PTR_ERR(isi->pclk); 1187 1188 ret = atmel_isi_parse_dt(isi, pdev); 1189 if (ret) 1190 return ret; 1191 1192 isi->active = NULL; 1193 isi->dev = &pdev->dev; 1194 mutex_init(&isi->lock); 1195 spin_lock_init(&isi->irqlock); 1196 INIT_LIST_HEAD(&isi->video_buffer_list); 1197 INIT_LIST_HEAD(&isi->dma_desc_head); 1198 1199 q = &isi->queue; 1200 1201 /* Initialize the top-level structure */ 1202 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1203 if (ret) 1204 return ret; 1205 1206 isi->vdev = video_device_alloc(); 1207 if (!isi->vdev) { 1208 ret = -ENOMEM; 1209 goto err_vdev_alloc; 1210 } 1211 1212 /* video node */ 1213 isi->vdev->fops = &isi_fops; 1214 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1215 isi->vdev->queue = &isi->queue; 1216 strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1217 isi->vdev->release = video_device_release; 1218 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1219 isi->vdev->lock = &isi->lock; 1220 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1221 V4L2_CAP_READWRITE; 1222 video_set_drvdata(isi->vdev, isi); 1223 1224 /* buffer queue */ 1225 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1226 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1227 q->lock = &isi->lock; 1228 q->drv_priv = isi; 1229 q->buf_struct_size = sizeof(struct frame_buffer); 1230 q->ops = &isi_video_qops; 1231 q->mem_ops = &vb2_dma_contig_memops; 1232 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1233 q->min_buffers_needed = 2; 1234 q->dev = &pdev->dev; 1235 1236 ret = vb2_queue_init(q); 1237 if (ret < 0) { 1238 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1239 goto err_vb2_queue; 1240 } 1241 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1242 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1243 &isi->fb_descriptors_phys, 1244 GFP_KERNEL); 1245 if (!isi->p_fb_descriptors) { 1246 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1247 ret = -ENOMEM; 1248 goto err_dma_alloc; 1249 } 1250 1251 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1252 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1253 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1254 i * sizeof(struct fbd); 1255 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1256 } 1257 1258 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1259 isi->regs = devm_ioremap_resource(&pdev->dev, regs); 1260 if (IS_ERR(isi->regs)) { 1261 ret = PTR_ERR(isi->regs); 1262 goto err_ioremap; 1263 } 1264 1265 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1266 isi->width_flags = 1 << 7; 1267 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1268 isi->width_flags |= 1 << 9; 1269 1270 irq = platform_get_irq(pdev, 0); 1271 if (irq < 0) { 1272 ret = irq; 1273 goto err_req_irq; 1274 } 1275 1276 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1277 if (ret) { 1278 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1279 goto err_req_irq; 1280 } 1281 isi->irq = irq; 1282 1283 ret = isi_graph_init(isi); 1284 if (ret < 0) 1285 goto err_req_irq; 1286 1287 pm_suspend_ignore_children(&pdev->dev, true); 1288 pm_runtime_enable(&pdev->dev); 1289 platform_set_drvdata(pdev, isi); 1290 return 0; 1291 1292 err_req_irq: 1293 err_ioremap: 1294 dma_free_coherent(&pdev->dev, 1295 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1296 isi->p_fb_descriptors, 1297 isi->fb_descriptors_phys); 1298 err_dma_alloc: 1299 err_vb2_queue: 1300 video_device_release(isi->vdev); 1301 err_vdev_alloc: 1302 v4l2_device_unregister(&isi->v4l2_dev); 1303 1304 return ret; 1305 } 1306 1307 static int atmel_isi_remove(struct platform_device *pdev) 1308 { 1309 struct atmel_isi *isi = platform_get_drvdata(pdev); 1310 1311 dma_free_coherent(&pdev->dev, 1312 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1313 isi->p_fb_descriptors, 1314 isi->fb_descriptors_phys); 1315 pm_runtime_disable(&pdev->dev); 1316 v4l2_async_notifier_unregister(&isi->notifier); 1317 v4l2_device_unregister(&isi->v4l2_dev); 1318 1319 return 0; 1320 } 1321 1322 #ifdef CONFIG_PM 1323 static int atmel_isi_runtime_suspend(struct device *dev) 1324 { 1325 struct atmel_isi *isi = dev_get_drvdata(dev); 1326 1327 clk_disable_unprepare(isi->pclk); 1328 1329 return 0; 1330 } 1331 static int atmel_isi_runtime_resume(struct device *dev) 1332 { 1333 struct atmel_isi *isi = dev_get_drvdata(dev); 1334 1335 return clk_prepare_enable(isi->pclk); 1336 } 1337 #endif /* CONFIG_PM */ 1338 1339 static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1340 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1341 atmel_isi_runtime_resume, NULL) 1342 }; 1343 1344 static const struct of_device_id atmel_isi_of_match[] = { 1345 { .compatible = "atmel,at91sam9g45-isi" }, 1346 { } 1347 }; 1348 MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1349 1350 static struct platform_driver atmel_isi_driver = { 1351 .driver = { 1352 .name = "atmel_isi", 1353 .of_match_table = of_match_ptr(atmel_isi_of_match), 1354 .pm = &atmel_isi_dev_pm_ops, 1355 }, 1356 .probe = atmel_isi_probe, 1357 .remove = atmel_isi_remove, 1358 }; 1359 1360 module_platform_driver(atmel_isi_driver); 1361 1362 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1363 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1364 MODULE_LICENSE("GPL"); 1365 MODULE_SUPPORTED_DEVICE("video"); 1366