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 fourcc == V4L2_PIX_FMT_Y16; 153 154 /* According to sensor's output format to set cfg2 */ 155 cfg2 = isi->current_fmt->swap; 156 157 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 158 /* Set width */ 159 cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) & 160 ISI_CFG2_IM_HSIZE_MASK; 161 /* Set height */ 162 cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET) 163 & ISI_CFG2_IM_VSIZE_MASK; 164 isi_writel(isi, ISI_CFG2, cfg2); 165 166 /* No down sampling, preview size equal to sensor output size */ 167 psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) & 168 ISI_PSIZE_PREV_HSIZE_MASK; 169 psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) & 170 ISI_PSIZE_PREV_VSIZE_MASK; 171 isi_writel(isi, ISI_PSIZE, psize); 172 isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING); 173 } 174 175 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi) 176 { 177 if (isi->active) { 178 struct vb2_v4l2_buffer *vbuf = &isi->active->vb; 179 struct frame_buffer *buf = isi->active; 180 181 list_del_init(&buf->list); 182 vbuf->vb2_buf.timestamp = ktime_get_ns(); 183 vbuf->sequence = isi->sequence++; 184 vbuf->field = V4L2_FIELD_NONE; 185 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE); 186 } 187 188 if (list_empty(&isi->video_buffer_list)) { 189 isi->active = NULL; 190 } else { 191 /* start next dma frame. */ 192 isi->active = list_entry(isi->video_buffer_list.next, 193 struct frame_buffer, list); 194 if (!isi->enable_preview_path) { 195 isi_writel(isi, ISI_DMA_C_DSCR, 196 (u32)isi->active->p_dma_desc->fbd_phys); 197 isi_writel(isi, ISI_DMA_C_CTRL, 198 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 199 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 200 } else { 201 isi_writel(isi, ISI_DMA_P_DSCR, 202 (u32)isi->active->p_dma_desc->fbd_phys); 203 isi_writel(isi, ISI_DMA_P_CTRL, 204 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 205 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 206 } 207 } 208 return IRQ_HANDLED; 209 } 210 211 /* ISI interrupt service routine */ 212 static irqreturn_t isi_interrupt(int irq, void *dev_id) 213 { 214 struct atmel_isi *isi = dev_id; 215 u32 status, mask, pending; 216 irqreturn_t ret = IRQ_NONE; 217 218 spin_lock(&isi->irqlock); 219 220 status = isi_readl(isi, ISI_STATUS); 221 mask = isi_readl(isi, ISI_INTMASK); 222 pending = status & mask; 223 224 if (pending & ISI_CTRL_SRST) { 225 complete(&isi->complete); 226 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST); 227 ret = IRQ_HANDLED; 228 } else if (pending & ISI_CTRL_DIS) { 229 complete(&isi->complete); 230 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS); 231 ret = IRQ_HANDLED; 232 } else { 233 if (likely(pending & ISI_SR_CXFR_DONE) || 234 likely(pending & ISI_SR_PXFR_DONE)) 235 ret = atmel_isi_handle_streaming(isi); 236 } 237 238 spin_unlock(&isi->irqlock); 239 return ret; 240 } 241 242 #define WAIT_ISI_RESET 1 243 #define WAIT_ISI_DISABLE 0 244 static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset) 245 { 246 unsigned long timeout; 247 /* 248 * The reset or disable will only succeed if we have a 249 * pixel clock from the camera. 250 */ 251 init_completion(&isi->complete); 252 253 if (wait_reset) { 254 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST); 255 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST); 256 } else { 257 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS); 258 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 259 } 260 261 timeout = wait_for_completion_timeout(&isi->complete, 262 msecs_to_jiffies(500)); 263 if (timeout == 0) 264 return -ETIMEDOUT; 265 266 return 0; 267 } 268 269 /* ------------------------------------------------------------------ 270 Videobuf operations 271 ------------------------------------------------------------------*/ 272 static int queue_setup(struct vb2_queue *vq, 273 unsigned int *nbuffers, unsigned int *nplanes, 274 unsigned int sizes[], struct device *alloc_devs[]) 275 { 276 struct atmel_isi *isi = vb2_get_drv_priv(vq); 277 unsigned long size; 278 279 size = isi->fmt.fmt.pix.sizeimage; 280 281 /* Make sure the image size is large enough. */ 282 if (*nplanes) 283 return sizes[0] < size ? -EINVAL : 0; 284 285 *nplanes = 1; 286 sizes[0] = size; 287 288 isi->active = NULL; 289 290 dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__, 291 *nbuffers, size); 292 293 return 0; 294 } 295 296 static int buffer_init(struct vb2_buffer *vb) 297 { 298 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 299 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 300 301 buf->p_dma_desc = NULL; 302 INIT_LIST_HEAD(&buf->list); 303 304 return 0; 305 } 306 307 static int buffer_prepare(struct vb2_buffer *vb) 308 { 309 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 310 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 311 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 312 unsigned long size; 313 struct isi_dma_desc *desc; 314 315 size = isi->fmt.fmt.pix.sizeimage; 316 317 if (vb2_plane_size(vb, 0) < size) { 318 dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n", 319 __func__, vb2_plane_size(vb, 0), size); 320 return -EINVAL; 321 } 322 323 vb2_set_plane_payload(vb, 0, size); 324 325 if (!buf->p_dma_desc) { 326 if (list_empty(&isi->dma_desc_head)) { 327 dev_err(isi->dev, "Not enough dma descriptors.\n"); 328 return -EINVAL; 329 } else { 330 /* Get an available descriptor */ 331 desc = list_entry(isi->dma_desc_head.next, 332 struct isi_dma_desc, list); 333 /* Delete the descriptor since now it is used */ 334 list_del_init(&desc->list); 335 336 /* Initialize the dma descriptor */ 337 desc->p_fbd->fb_address = 338 vb2_dma_contig_plane_dma_addr(vb, 0); 339 desc->p_fbd->next_fbd_address = 0; 340 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB); 341 342 buf->p_dma_desc = desc; 343 } 344 } 345 return 0; 346 } 347 348 static void buffer_cleanup(struct vb2_buffer *vb) 349 { 350 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 351 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 352 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 353 354 /* This descriptor is available now and we add to head list */ 355 if (buf->p_dma_desc) 356 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head); 357 } 358 359 static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer) 360 { 361 u32 ctrl, cfg1; 362 363 cfg1 = isi_readl(isi, ISI_CFG1); 364 /* Enable irq: cxfr for the codec path, pxfr for the preview path */ 365 isi_writel(isi, ISI_INTEN, 366 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 367 368 /* Check if already in a frame */ 369 if (!isi->enable_preview_path) { 370 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) { 371 dev_err(isi->dev, "Already in frame handling.\n"); 372 return; 373 } 374 375 isi_writel(isi, ISI_DMA_C_DSCR, 376 (u32)buffer->p_dma_desc->fbd_phys); 377 isi_writel(isi, ISI_DMA_C_CTRL, 378 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 379 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); 380 } else { 381 isi_writel(isi, ISI_DMA_P_DSCR, 382 (u32)buffer->p_dma_desc->fbd_phys); 383 isi_writel(isi, ISI_DMA_P_CTRL, 384 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); 385 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); 386 } 387 388 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK; 389 /* Enable linked list */ 390 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR; 391 392 /* Enable ISI */ 393 ctrl = ISI_CTRL_EN; 394 395 if (!isi->enable_preview_path) 396 ctrl |= ISI_CTRL_CDC; 397 398 isi_writel(isi, ISI_CTRL, ctrl); 399 isi_writel(isi, ISI_CFG1, cfg1); 400 } 401 402 static void buffer_queue(struct vb2_buffer *vb) 403 { 404 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 405 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue); 406 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); 407 unsigned long flags = 0; 408 409 spin_lock_irqsave(&isi->irqlock, flags); 410 list_add_tail(&buf->list, &isi->video_buffer_list); 411 412 if (!isi->active) { 413 isi->active = buf; 414 if (vb2_is_streaming(vb->vb2_queue)) 415 start_dma(isi, buf); 416 } 417 spin_unlock_irqrestore(&isi->irqlock, flags); 418 } 419 420 static int start_streaming(struct vb2_queue *vq, unsigned int count) 421 { 422 struct atmel_isi *isi = vb2_get_drv_priv(vq); 423 struct frame_buffer *buf, *node; 424 int ret; 425 426 pm_runtime_get_sync(isi->dev); 427 428 /* Enable stream on the sub device */ 429 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1); 430 if (ret && ret != -ENOIOCTLCMD) { 431 dev_err(isi->dev, "stream on failed in subdev\n"); 432 goto err_start_stream; 433 } 434 435 /* Reset ISI */ 436 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); 437 if (ret < 0) { 438 dev_err(isi->dev, "Reset ISI timed out\n"); 439 goto err_reset; 440 } 441 /* Disable all interrupts */ 442 isi_writel(isi, ISI_INTDIS, (u32)~0UL); 443 444 isi->sequence = 0; 445 configure_geometry(isi); 446 447 spin_lock_irq(&isi->irqlock); 448 /* Clear any pending interrupt */ 449 isi_readl(isi, ISI_STATUS); 450 451 start_dma(isi, isi->active); 452 spin_unlock_irq(&isi->irqlock); 453 454 return 0; 455 456 err_reset: 457 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 458 459 err_start_stream: 460 pm_runtime_put(isi->dev); 461 462 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) / 1000; 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 void isi_try_fse(struct atmel_isi *isi, const struct isi_format *isi_fmt, 559 struct v4l2_subdev_pad_config *pad_cfg) 560 { 561 int ret; 562 struct v4l2_subdev_frame_size_enum fse = { 563 .code = isi_fmt->mbus_code, 564 .which = V4L2_SUBDEV_FORMAT_TRY, 565 }; 566 567 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 568 pad_cfg, &fse); 569 /* 570 * Attempt to obtain format size from subdev. If not available, 571 * just use the maximum ISI can receive. 572 */ 573 if (ret) { 574 pad_cfg->try_crop.width = MAX_SUPPORT_WIDTH; 575 pad_cfg->try_crop.height = MAX_SUPPORT_HEIGHT; 576 } else { 577 pad_cfg->try_crop.width = fse.max_width; 578 pad_cfg->try_crop.height = fse.max_height; 579 } 580 } 581 582 static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, 583 const struct isi_format **current_fmt) 584 { 585 const struct isi_format *isi_fmt; 586 struct v4l2_pix_format *pixfmt = &f->fmt.pix; 587 struct v4l2_subdev_pad_config pad_cfg = {}; 588 struct v4l2_subdev_format format = { 589 .which = V4L2_SUBDEV_FORMAT_TRY, 590 }; 591 int ret; 592 593 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 594 if (!isi_fmt) { 595 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 596 pixfmt->pixelformat = isi_fmt->fourcc; 597 } 598 599 /* Limit to Atmel ISI hardware capabilities */ 600 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); 601 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); 602 603 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 604 605 isi_try_fse(isi, isi_fmt, &pad_cfg); 606 607 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 608 &pad_cfg, &format); 609 if (ret < 0) 610 return ret; 611 612 v4l2_fill_pix_format(pixfmt, &format.format); 613 614 pixfmt->field = V4L2_FIELD_NONE; 615 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 616 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 617 618 if (current_fmt) 619 *current_fmt = isi_fmt; 620 621 return 0; 622 } 623 624 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 625 { 626 struct v4l2_subdev_format format = { 627 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 628 }; 629 const struct isi_format *current_fmt; 630 int ret; 631 632 ret = isi_try_fmt(isi, f, ¤t_fmt); 633 if (ret) 634 return ret; 635 636 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 637 current_fmt->mbus_code); 638 ret = v4l2_subdev_call(isi->entity.subdev, pad, 639 set_fmt, NULL, &format); 640 if (ret < 0) 641 return ret; 642 643 isi->fmt = *f; 644 isi->current_fmt = current_fmt; 645 646 return 0; 647 } 648 649 static int isi_s_fmt_vid_cap(struct file *file, void *priv, 650 struct v4l2_format *f) 651 { 652 struct atmel_isi *isi = video_drvdata(file); 653 654 if (vb2_is_streaming(&isi->queue)) 655 return -EBUSY; 656 657 return isi_set_fmt(isi, f); 658 } 659 660 static int isi_try_fmt_vid_cap(struct file *file, void *priv, 661 struct v4l2_format *f) 662 { 663 struct atmel_isi *isi = video_drvdata(file); 664 665 return isi_try_fmt(isi, f, NULL); 666 } 667 668 static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 669 struct v4l2_fmtdesc *f) 670 { 671 struct atmel_isi *isi = video_drvdata(file); 672 673 if (f->index >= isi->num_user_formats) 674 return -EINVAL; 675 676 f->pixelformat = isi->user_formats[f->index]->fourcc; 677 return 0; 678 } 679 680 static int isi_querycap(struct file *file, void *priv, 681 struct v4l2_capability *cap) 682 { 683 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 684 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 685 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 686 return 0; 687 } 688 689 static int isi_enum_input(struct file *file, void *priv, 690 struct v4l2_input *i) 691 { 692 if (i->index != 0) 693 return -EINVAL; 694 695 i->type = V4L2_INPUT_TYPE_CAMERA; 696 strscpy(i->name, "Camera", sizeof(i->name)); 697 return 0; 698 } 699 700 static int isi_g_input(struct file *file, void *priv, unsigned int *i) 701 { 702 *i = 0; 703 return 0; 704 } 705 706 static int isi_s_input(struct file *file, void *priv, unsigned int i) 707 { 708 if (i > 0) 709 return -EINVAL; 710 return 0; 711 } 712 713 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 714 { 715 struct atmel_isi *isi = video_drvdata(file); 716 717 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a); 718 } 719 720 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 721 { 722 struct atmel_isi *isi = video_drvdata(file); 723 724 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a); 725 } 726 727 static int isi_enum_framesizes(struct file *file, void *fh, 728 struct v4l2_frmsizeenum *fsize) 729 { 730 struct atmel_isi *isi = video_drvdata(file); 731 const struct isi_format *isi_fmt; 732 struct v4l2_subdev_frame_size_enum fse = { 733 .index = fsize->index, 734 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 735 }; 736 int ret; 737 738 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 739 if (!isi_fmt) 740 return -EINVAL; 741 742 fse.code = isi_fmt->mbus_code; 743 744 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 745 NULL, &fse); 746 if (ret) 747 return ret; 748 749 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 750 fsize->discrete.width = fse.max_width; 751 fsize->discrete.height = fse.max_height; 752 753 return 0; 754 } 755 756 static int isi_enum_frameintervals(struct file *file, void *fh, 757 struct v4l2_frmivalenum *fival) 758 { 759 struct atmel_isi *isi = video_drvdata(file); 760 const struct isi_format *isi_fmt; 761 struct v4l2_subdev_frame_interval_enum fie = { 762 .index = fival->index, 763 .width = fival->width, 764 .height = fival->height, 765 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 766 }; 767 int ret; 768 769 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 770 if (!isi_fmt) 771 return -EINVAL; 772 773 fie.code = isi_fmt->mbus_code; 774 775 ret = v4l2_subdev_call(isi->entity.subdev, pad, 776 enum_frame_interval, NULL, &fie); 777 if (ret) 778 return ret; 779 780 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 781 fival->discrete = fie.interval; 782 783 return 0; 784 } 785 786 static void isi_camera_set_bus_param(struct atmel_isi *isi) 787 { 788 u32 cfg1 = 0; 789 790 /* set bus param for ISI */ 791 if (isi->pdata.hsync_act_low) 792 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 793 if (isi->pdata.vsync_act_low) 794 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 795 if (isi->pdata.pclk_act_falling) 796 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 797 if (isi->pdata.has_emb_sync) 798 cfg1 |= ISI_CFG1_EMB_SYNC; 799 if (isi->pdata.full_mode) 800 cfg1 |= ISI_CFG1_FULL_MODE; 801 802 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 803 804 /* Enable PM and peripheral clock before operate isi registers */ 805 pm_runtime_get_sync(isi->dev); 806 807 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 808 isi_writel(isi, ISI_CFG1, cfg1); 809 810 pm_runtime_put(isi->dev); 811 } 812 813 /* -----------------------------------------------------------------------*/ 814 static int atmel_isi_parse_dt(struct atmel_isi *isi, 815 struct platform_device *pdev) 816 { 817 struct device_node *np = pdev->dev.of_node; 818 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 }; 819 int err; 820 821 /* Default settings for ISI */ 822 isi->pdata.full_mode = 1; 823 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 824 825 np = of_graph_get_next_endpoint(np, NULL); 826 if (!np) { 827 dev_err(&pdev->dev, "Could not find the endpoint\n"); 828 return -EINVAL; 829 } 830 831 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep); 832 of_node_put(np); 833 if (err) { 834 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 835 return err; 836 } 837 838 switch (ep.bus.parallel.bus_width) { 839 case 8: 840 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 841 break; 842 case 10: 843 isi->pdata.data_width_flags = 844 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 845 break; 846 default: 847 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 848 ep.bus.parallel.bus_width); 849 return -EINVAL; 850 } 851 852 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 853 isi->pdata.hsync_act_low = true; 854 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 855 isi->pdata.vsync_act_low = true; 856 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 857 isi->pdata.pclk_act_falling = true; 858 859 if (ep.bus_type == V4L2_MBUS_BT656) 860 isi->pdata.has_emb_sync = true; 861 862 return 0; 863 } 864 865 static int isi_open(struct file *file) 866 { 867 struct atmel_isi *isi = video_drvdata(file); 868 struct v4l2_subdev *sd = isi->entity.subdev; 869 int ret; 870 871 if (mutex_lock_interruptible(&isi->lock)) 872 return -ERESTARTSYS; 873 874 ret = v4l2_fh_open(file); 875 if (ret < 0) 876 goto unlock; 877 878 if (!v4l2_fh_is_singular_file(file)) 879 goto fh_rel; 880 881 ret = v4l2_subdev_call(sd, core, s_power, 1); 882 if (ret < 0 && ret != -ENOIOCTLCMD) 883 goto fh_rel; 884 885 ret = isi_set_fmt(isi, &isi->fmt); 886 if (ret) 887 v4l2_subdev_call(sd, core, s_power, 0); 888 fh_rel: 889 if (ret) 890 v4l2_fh_release(file); 891 unlock: 892 mutex_unlock(&isi->lock); 893 return ret; 894 } 895 896 static int isi_release(struct file *file) 897 { 898 struct atmel_isi *isi = video_drvdata(file); 899 struct v4l2_subdev *sd = isi->entity.subdev; 900 bool fh_singular; 901 int ret; 902 903 mutex_lock(&isi->lock); 904 905 fh_singular = v4l2_fh_is_singular_file(file); 906 907 ret = _vb2_fop_release(file, NULL); 908 909 if (fh_singular) 910 v4l2_subdev_call(sd, core, s_power, 0); 911 912 mutex_unlock(&isi->lock); 913 914 return ret; 915 } 916 917 static const struct v4l2_ioctl_ops isi_ioctl_ops = { 918 .vidioc_querycap = isi_querycap, 919 920 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 921 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 922 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 923 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 924 925 .vidioc_enum_input = isi_enum_input, 926 .vidioc_g_input = isi_g_input, 927 .vidioc_s_input = isi_s_input, 928 929 .vidioc_g_parm = isi_g_parm, 930 .vidioc_s_parm = isi_s_parm, 931 .vidioc_enum_framesizes = isi_enum_framesizes, 932 .vidioc_enum_frameintervals = isi_enum_frameintervals, 933 934 .vidioc_reqbufs = vb2_ioctl_reqbufs, 935 .vidioc_create_bufs = vb2_ioctl_create_bufs, 936 .vidioc_querybuf = vb2_ioctl_querybuf, 937 .vidioc_qbuf = vb2_ioctl_qbuf, 938 .vidioc_dqbuf = vb2_ioctl_dqbuf, 939 .vidioc_expbuf = vb2_ioctl_expbuf, 940 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 941 .vidioc_streamon = vb2_ioctl_streamon, 942 .vidioc_streamoff = vb2_ioctl_streamoff, 943 944 .vidioc_log_status = v4l2_ctrl_log_status, 945 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 946 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 947 }; 948 949 static const struct v4l2_file_operations isi_fops = { 950 .owner = THIS_MODULE, 951 .unlocked_ioctl = video_ioctl2, 952 .open = isi_open, 953 .release = isi_release, 954 .poll = vb2_fop_poll, 955 .mmap = vb2_fop_mmap, 956 .read = vb2_fop_read, 957 }; 958 959 static int isi_set_default_fmt(struct atmel_isi *isi) 960 { 961 struct v4l2_format f = { 962 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 963 .fmt.pix = { 964 .width = VGA_WIDTH, 965 .height = VGA_HEIGHT, 966 .field = V4L2_FIELD_NONE, 967 .pixelformat = isi->user_formats[0]->fourcc, 968 }, 969 }; 970 int ret; 971 972 ret = isi_try_fmt(isi, &f, NULL); 973 if (ret) 974 return ret; 975 isi->current_fmt = isi->user_formats[0]; 976 isi->fmt = f; 977 return 0; 978 } 979 980 static const struct isi_format isi_formats[] = { 981 { 982 .fourcc = V4L2_PIX_FMT_YUYV, 983 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 984 .bpp = 2, 985 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 986 }, { 987 .fourcc = V4L2_PIX_FMT_YUYV, 988 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 989 .bpp = 2, 990 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 991 }, { 992 .fourcc = V4L2_PIX_FMT_YUYV, 993 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 994 .bpp = 2, 995 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 996 }, { 997 .fourcc = V4L2_PIX_FMT_YUYV, 998 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 999 .bpp = 2, 1000 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1001 }, { 1002 .fourcc = V4L2_PIX_FMT_RGB565, 1003 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 1004 .bpp = 2, 1005 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1006 }, { 1007 .fourcc = V4L2_PIX_FMT_RGB565, 1008 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 1009 .bpp = 2, 1010 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1011 }, { 1012 .fourcc = V4L2_PIX_FMT_RGB565, 1013 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1014 .bpp = 2, 1015 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 1016 }, { 1017 .fourcc = V4L2_PIX_FMT_RGB565, 1018 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1019 .bpp = 2, 1020 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1021 }, { 1022 .fourcc = V4L2_PIX_FMT_GREY, 1023 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1024 .bpp = 1, 1025 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1026 }, { 1027 .fourcc = V4L2_PIX_FMT_Y16, 1028 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1029 .bpp = 2, 1030 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1031 }, 1032 }; 1033 1034 static int isi_formats_init(struct atmel_isi *isi) 1035 { 1036 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 1037 unsigned int num_fmts = 0, i, j; 1038 struct v4l2_subdev *subdev = isi->entity.subdev; 1039 struct v4l2_subdev_mbus_code_enum mbus_code = { 1040 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1041 }; 1042 1043 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1044 NULL, &mbus_code)) { 1045 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1046 if (isi_formats[i].mbus_code != mbus_code.code) 1047 continue; 1048 1049 /* Code supported, have we got this fourcc yet? */ 1050 for (j = 0; j < num_fmts; j++) 1051 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1052 /* Already available */ 1053 break; 1054 if (j == num_fmts) 1055 /* new */ 1056 isi_fmts[num_fmts++] = isi_formats + i; 1057 } 1058 mbus_code.index++; 1059 } 1060 1061 if (!num_fmts) 1062 return -ENXIO; 1063 1064 isi->num_user_formats = num_fmts; 1065 isi->user_formats = devm_kcalloc(isi->dev, 1066 num_fmts, sizeof(struct isi_format *), 1067 GFP_KERNEL); 1068 if (!isi->user_formats) 1069 return -ENOMEM; 1070 1071 memcpy(isi->user_formats, isi_fmts, 1072 num_fmts * sizeof(struct isi_format *)); 1073 isi->current_fmt = isi->user_formats[0]; 1074 1075 return 0; 1076 } 1077 1078 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1079 { 1080 struct atmel_isi *isi = notifier_to_isi(notifier); 1081 int ret; 1082 1083 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1084 ret = isi_formats_init(isi); 1085 if (ret) { 1086 dev_err(isi->dev, "No supported mediabus format found\n"); 1087 return ret; 1088 } 1089 isi_camera_set_bus_param(isi); 1090 1091 ret = isi_set_default_fmt(isi); 1092 if (ret) { 1093 dev_err(isi->dev, "Could not set default format\n"); 1094 return ret; 1095 } 1096 1097 ret = video_register_device(isi->vdev, VFL_TYPE_VIDEO, -1); 1098 if (ret) { 1099 dev_err(isi->dev, "Failed to register video device\n"); 1100 return ret; 1101 } 1102 1103 dev_dbg(isi->dev, "Device registered as %s\n", 1104 video_device_node_name(isi->vdev)); 1105 return 0; 1106 } 1107 1108 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1109 struct v4l2_subdev *sd, 1110 struct v4l2_async_subdev *asd) 1111 { 1112 struct atmel_isi *isi = notifier_to_isi(notifier); 1113 1114 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1115 1116 /* Checks internally if vdev have been init or not */ 1117 video_unregister_device(isi->vdev); 1118 } 1119 1120 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1121 struct v4l2_subdev *subdev, 1122 struct v4l2_async_subdev *asd) 1123 { 1124 struct atmel_isi *isi = notifier_to_isi(notifier); 1125 1126 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1127 1128 isi->entity.subdev = subdev; 1129 1130 return 0; 1131 } 1132 1133 static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { 1134 .bound = isi_graph_notify_bound, 1135 .unbind = isi_graph_notify_unbind, 1136 .complete = isi_graph_notify_complete, 1137 }; 1138 1139 static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node) 1140 { 1141 struct device_node *ep = NULL; 1142 struct device_node *remote; 1143 1144 ep = of_graph_get_next_endpoint(node, ep); 1145 if (!ep) 1146 return -EINVAL; 1147 1148 remote = of_graph_get_remote_port_parent(ep); 1149 of_node_put(ep); 1150 if (!remote) 1151 return -EINVAL; 1152 1153 /* Remote node to connect */ 1154 isi->entity.node = remote; 1155 isi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; 1156 isi->entity.asd.match.fwnode = of_fwnode_handle(remote); 1157 return 0; 1158 } 1159 1160 static int isi_graph_init(struct atmel_isi *isi) 1161 { 1162 int ret; 1163 1164 /* Parse the graph to extract a list of subdevice DT nodes. */ 1165 ret = isi_graph_parse(isi, isi->dev->of_node); 1166 if (ret < 0) { 1167 dev_err(isi->dev, "Graph parsing failed\n"); 1168 return ret; 1169 } 1170 1171 v4l2_async_notifier_init(&isi->notifier); 1172 1173 ret = v4l2_async_notifier_add_subdev(&isi->notifier, &isi->entity.asd); 1174 if (ret) { 1175 of_node_put(isi->entity.node); 1176 return ret; 1177 } 1178 1179 isi->notifier.ops = &isi_graph_notify_ops; 1180 1181 ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier); 1182 if (ret < 0) { 1183 dev_err(isi->dev, "Notifier registration failed\n"); 1184 v4l2_async_notifier_cleanup(&isi->notifier); 1185 return ret; 1186 } 1187 1188 return 0; 1189 } 1190 1191 1192 static int atmel_isi_probe(struct platform_device *pdev) 1193 { 1194 int irq; 1195 struct atmel_isi *isi; 1196 struct vb2_queue *q; 1197 struct resource *regs; 1198 int ret, i; 1199 1200 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1201 if (!isi) 1202 return -ENOMEM; 1203 1204 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1205 if (IS_ERR(isi->pclk)) 1206 return PTR_ERR(isi->pclk); 1207 1208 ret = atmel_isi_parse_dt(isi, pdev); 1209 if (ret) 1210 return ret; 1211 1212 isi->active = NULL; 1213 isi->dev = &pdev->dev; 1214 mutex_init(&isi->lock); 1215 spin_lock_init(&isi->irqlock); 1216 INIT_LIST_HEAD(&isi->video_buffer_list); 1217 INIT_LIST_HEAD(&isi->dma_desc_head); 1218 1219 q = &isi->queue; 1220 1221 /* Initialize the top-level structure */ 1222 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1223 if (ret) 1224 return ret; 1225 1226 isi->vdev = video_device_alloc(); 1227 if (!isi->vdev) { 1228 ret = -ENOMEM; 1229 goto err_vdev_alloc; 1230 } 1231 1232 /* video node */ 1233 isi->vdev->fops = &isi_fops; 1234 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1235 isi->vdev->queue = &isi->queue; 1236 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1237 isi->vdev->release = video_device_release; 1238 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1239 isi->vdev->lock = &isi->lock; 1240 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1241 V4L2_CAP_READWRITE; 1242 video_set_drvdata(isi->vdev, isi); 1243 1244 /* buffer queue */ 1245 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1246 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1247 q->lock = &isi->lock; 1248 q->drv_priv = isi; 1249 q->buf_struct_size = sizeof(struct frame_buffer); 1250 q->ops = &isi_video_qops; 1251 q->mem_ops = &vb2_dma_contig_memops; 1252 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1253 q->min_buffers_needed = 2; 1254 q->dev = &pdev->dev; 1255 1256 ret = vb2_queue_init(q); 1257 if (ret < 0) { 1258 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1259 goto err_vb2_queue; 1260 } 1261 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1262 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1263 &isi->fb_descriptors_phys, 1264 GFP_KERNEL); 1265 if (!isi->p_fb_descriptors) { 1266 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1267 ret = -ENOMEM; 1268 goto err_dma_alloc; 1269 } 1270 1271 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1272 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1273 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1274 i * sizeof(struct fbd); 1275 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1276 } 1277 1278 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1279 isi->regs = devm_ioremap_resource(&pdev->dev, regs); 1280 if (IS_ERR(isi->regs)) { 1281 ret = PTR_ERR(isi->regs); 1282 goto err_ioremap; 1283 } 1284 1285 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1286 isi->width_flags = 1 << 7; 1287 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1288 isi->width_flags |= 1 << 9; 1289 1290 irq = platform_get_irq(pdev, 0); 1291 if (irq < 0) { 1292 ret = irq; 1293 goto err_req_irq; 1294 } 1295 1296 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1297 if (ret) { 1298 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1299 goto err_req_irq; 1300 } 1301 isi->irq = irq; 1302 1303 ret = isi_graph_init(isi); 1304 if (ret < 0) 1305 goto err_req_irq; 1306 1307 pm_suspend_ignore_children(&pdev->dev, true); 1308 pm_runtime_enable(&pdev->dev); 1309 platform_set_drvdata(pdev, isi); 1310 return 0; 1311 1312 err_req_irq: 1313 err_ioremap: 1314 dma_free_coherent(&pdev->dev, 1315 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1316 isi->p_fb_descriptors, 1317 isi->fb_descriptors_phys); 1318 err_dma_alloc: 1319 err_vb2_queue: 1320 video_device_release(isi->vdev); 1321 err_vdev_alloc: 1322 v4l2_device_unregister(&isi->v4l2_dev); 1323 1324 return ret; 1325 } 1326 1327 static int atmel_isi_remove(struct platform_device *pdev) 1328 { 1329 struct atmel_isi *isi = platform_get_drvdata(pdev); 1330 1331 dma_free_coherent(&pdev->dev, 1332 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1333 isi->p_fb_descriptors, 1334 isi->fb_descriptors_phys); 1335 pm_runtime_disable(&pdev->dev); 1336 v4l2_async_notifier_unregister(&isi->notifier); 1337 v4l2_async_notifier_cleanup(&isi->notifier); 1338 v4l2_device_unregister(&isi->v4l2_dev); 1339 1340 return 0; 1341 } 1342 1343 #ifdef CONFIG_PM 1344 static int atmel_isi_runtime_suspend(struct device *dev) 1345 { 1346 struct atmel_isi *isi = dev_get_drvdata(dev); 1347 1348 clk_disable_unprepare(isi->pclk); 1349 1350 return 0; 1351 } 1352 static int atmel_isi_runtime_resume(struct device *dev) 1353 { 1354 struct atmel_isi *isi = dev_get_drvdata(dev); 1355 1356 return clk_prepare_enable(isi->pclk); 1357 } 1358 #endif /* CONFIG_PM */ 1359 1360 static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1361 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1362 atmel_isi_runtime_resume, NULL) 1363 }; 1364 1365 static const struct of_device_id atmel_isi_of_match[] = { 1366 { .compatible = "atmel,at91sam9g45-isi" }, 1367 { } 1368 }; 1369 MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1370 1371 static struct platform_driver atmel_isi_driver = { 1372 .driver = { 1373 .name = "atmel_isi", 1374 .of_match_table = of_match_ptr(atmel_isi_of_match), 1375 .pm = &atmel_isi_dev_pm_ops, 1376 }, 1377 .probe = atmel_isi_probe, 1378 .remove = atmel_isi_remove, 1379 }; 1380 1381 module_platform_driver(atmel_isi_driver); 1382 1383 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1384 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1385 MODULE_LICENSE("GPL"); 1386 MODULE_SUPPORTED_DEVICE("video"); 1387