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_subdev *subdev; 74 }; 75 76 /* 77 * struct isi_format - ISI media bus format information 78 * @fourcc: Fourcc code for this format 79 * @mbus_code: V4L2 media bus format code. 80 * @bpp: Bytes per pixel (when stored in memory) 81 * @swap: Byte swap configuration value 82 * @support: Indicates format supported by subdev 83 * @skip: Skip duplicate format supported by subdev 84 */ 85 struct isi_format { 86 u32 fourcc; 87 u32 mbus_code; 88 u8 bpp; 89 u32 swap; 90 }; 91 92 93 struct atmel_isi { 94 /* Protects the access of variables shared with the ISR */ 95 spinlock_t irqlock; 96 struct device *dev; 97 void __iomem *regs; 98 99 int sequence; 100 101 /* Allocate descriptors for dma buffer use */ 102 struct fbd *p_fb_descriptors; 103 dma_addr_t fb_descriptors_phys; 104 struct list_head dma_desc_head; 105 struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME]; 106 bool enable_preview_path; 107 108 struct completion complete; 109 /* ISI peripheral clock */ 110 struct clk *pclk; 111 unsigned int irq; 112 113 struct isi_platform_data pdata; 114 u16 width_flags; /* max 12 bits */ 115 116 struct list_head video_buffer_list; 117 struct frame_buffer *active; 118 119 struct v4l2_device v4l2_dev; 120 struct video_device *vdev; 121 struct v4l2_async_notifier notifier; 122 struct isi_graph_entity entity; 123 struct v4l2_format fmt; 124 125 const struct isi_format **user_formats; 126 unsigned int num_user_formats; 127 const struct isi_format *current_fmt; 128 129 struct mutex lock; 130 struct vb2_queue queue; 131 }; 132 133 #define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier) 134 135 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) 136 { 137 writel(val, isi->regs + reg); 138 } 139 static u32 isi_readl(struct atmel_isi *isi, u32 reg) 140 { 141 return readl(isi->regs + reg); 142 } 143 144 static void configure_geometry(struct atmel_isi *isi) 145 { 146 u32 cfg2, psize; 147 u32 fourcc = isi->current_fmt->fourcc; 148 149 isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 || 150 fourcc == V4L2_PIX_FMT_RGB32 || 151 fourcc == V4L2_PIX_FMT_Y16; 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 ret = pm_runtime_resume_and_get(isi->dev); 426 if (ret < 0) 427 return ret; 428 429 /* Enable stream on the sub device */ 430 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1); 431 if (ret && ret != -ENOIOCTLCMD) { 432 dev_err(isi->dev, "stream on failed in subdev\n"); 433 goto err_start_stream; 434 } 435 436 /* Reset ISI */ 437 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); 438 if (ret < 0) { 439 dev_err(isi->dev, "Reset ISI timed out\n"); 440 goto err_reset; 441 } 442 /* Disable all interrupts */ 443 isi_writel(isi, ISI_INTDIS, (u32)~0UL); 444 445 isi->sequence = 0; 446 configure_geometry(isi); 447 448 spin_lock_irq(&isi->irqlock); 449 /* Clear any pending interrupt */ 450 isi_readl(isi, ISI_STATUS); 451 452 start_dma(isi, isi->active); 453 spin_unlock_irq(&isi->irqlock); 454 455 return 0; 456 457 err_reset: 458 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 459 460 err_start_stream: 461 pm_runtime_put(isi->dev); 462 463 spin_lock_irq(&isi->irqlock); 464 isi->active = NULL; 465 /* Release all active buffers */ 466 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 467 list_del_init(&buf->list); 468 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); 469 } 470 spin_unlock_irq(&isi->irqlock); 471 472 return ret; 473 } 474 475 /* abort streaming and wait for last buffer */ 476 static void stop_streaming(struct vb2_queue *vq) 477 { 478 struct atmel_isi *isi = vb2_get_drv_priv(vq); 479 struct frame_buffer *buf, *node; 480 int ret = 0; 481 unsigned long timeout; 482 483 /* Disable stream on the sub device */ 484 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 485 if (ret && ret != -ENOIOCTLCMD) 486 dev_err(isi->dev, "stream off failed in subdev\n"); 487 488 spin_lock_irq(&isi->irqlock); 489 isi->active = NULL; 490 /* Release all active buffers */ 491 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { 492 list_del_init(&buf->list); 493 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 494 } 495 spin_unlock_irq(&isi->irqlock); 496 497 if (!isi->enable_preview_path) { 498 timeout = jiffies + (FRAME_INTERVAL_MILLI_SEC * HZ) / 1000; 499 /* Wait until the end of the current frame. */ 500 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) && 501 time_before(jiffies, timeout)) 502 msleep(1); 503 504 if (time_after(jiffies, timeout)) 505 dev_err(isi->dev, 506 "Timeout waiting for finishing codec request\n"); 507 } 508 509 /* Disable interrupts */ 510 isi_writel(isi, ISI_INTDIS, 511 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); 512 513 /* Disable ISI and wait for it is done */ 514 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE); 515 if (ret < 0) 516 dev_err(isi->dev, "Disable ISI timed out\n"); 517 518 pm_runtime_put(isi->dev); 519 } 520 521 static const struct vb2_ops isi_video_qops = { 522 .queue_setup = queue_setup, 523 .buf_init = buffer_init, 524 .buf_prepare = buffer_prepare, 525 .buf_cleanup = buffer_cleanup, 526 .buf_queue = buffer_queue, 527 .start_streaming = start_streaming, 528 .stop_streaming = stop_streaming, 529 .wait_prepare = vb2_ops_wait_prepare, 530 .wait_finish = vb2_ops_wait_finish, 531 }; 532 533 static int isi_g_fmt_vid_cap(struct file *file, void *priv, 534 struct v4l2_format *fmt) 535 { 536 struct atmel_isi *isi = video_drvdata(file); 537 538 *fmt = isi->fmt; 539 540 return 0; 541 } 542 543 static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi, 544 unsigned int fourcc) 545 { 546 unsigned int num_formats = isi->num_user_formats; 547 const struct isi_format *fmt; 548 unsigned int i; 549 550 for (i = 0; i < num_formats; i++) { 551 fmt = isi->user_formats[i]; 552 if (fmt->fourcc == fourcc) 553 return fmt; 554 } 555 556 return NULL; 557 } 558 559 static void isi_try_fse(struct atmel_isi *isi, const struct isi_format *isi_fmt, 560 struct v4l2_subdev_state *sd_state) 561 { 562 struct v4l2_rect *try_crop = 563 v4l2_subdev_state_get_crop(sd_state, 0); 564 struct v4l2_subdev_frame_size_enum fse = { 565 .code = isi_fmt->mbus_code, 566 .which = V4L2_SUBDEV_FORMAT_TRY, 567 }; 568 int ret; 569 570 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 571 sd_state, &fse); 572 /* 573 * Attempt to obtain format size from subdev. If not available, 574 * just use the maximum ISI can receive. 575 */ 576 if (ret) { 577 try_crop->width = MAX_SUPPORT_WIDTH; 578 try_crop->height = MAX_SUPPORT_HEIGHT; 579 } else { 580 try_crop->width = fse.max_width; 581 try_crop->height = fse.max_height; 582 } 583 } 584 585 static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, 586 const struct isi_format **current_fmt) 587 { 588 const struct isi_format *isi_fmt; 589 struct v4l2_pix_format *pixfmt = &f->fmt.pix; 590 struct v4l2_subdev_pad_config pad_cfg = {}; 591 struct v4l2_subdev_state pad_state = { 592 .sd = isi->entity.subdev, 593 .pads = &pad_cfg, 594 }; 595 struct v4l2_subdev_format format = { 596 .which = V4L2_SUBDEV_FORMAT_TRY, 597 }; 598 int ret; 599 600 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 601 if (!isi_fmt) { 602 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 603 pixfmt->pixelformat = isi_fmt->fourcc; 604 } 605 606 /* Limit to Atmel ISI hardware capabilities */ 607 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); 608 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); 609 610 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 611 612 isi_try_fse(isi, isi_fmt, &pad_state); 613 614 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 615 &pad_state, &format); 616 if (ret < 0) 617 return ret; 618 619 v4l2_fill_pix_format(pixfmt, &format.format); 620 621 pixfmt->field = V4L2_FIELD_NONE; 622 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 623 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 624 625 if (current_fmt) 626 *current_fmt = isi_fmt; 627 628 return 0; 629 } 630 631 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 632 { 633 struct v4l2_subdev_format format = { 634 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 635 }; 636 const struct isi_format *current_fmt; 637 int ret; 638 639 ret = isi_try_fmt(isi, f, ¤t_fmt); 640 if (ret) 641 return ret; 642 643 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 644 current_fmt->mbus_code); 645 ret = v4l2_subdev_call(isi->entity.subdev, pad, 646 set_fmt, NULL, &format); 647 if (ret < 0) 648 return ret; 649 650 isi->fmt = *f; 651 isi->current_fmt = current_fmt; 652 653 return 0; 654 } 655 656 static int isi_s_fmt_vid_cap(struct file *file, void *priv, 657 struct v4l2_format *f) 658 { 659 struct atmel_isi *isi = video_drvdata(file); 660 661 if (vb2_is_streaming(&isi->queue)) 662 return -EBUSY; 663 664 return isi_set_fmt(isi, f); 665 } 666 667 static int isi_try_fmt_vid_cap(struct file *file, void *priv, 668 struct v4l2_format *f) 669 { 670 struct atmel_isi *isi = video_drvdata(file); 671 672 return isi_try_fmt(isi, f, NULL); 673 } 674 675 static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 676 struct v4l2_fmtdesc *f) 677 { 678 struct atmel_isi *isi = video_drvdata(file); 679 680 if (f->index >= isi->num_user_formats) 681 return -EINVAL; 682 683 f->pixelformat = isi->user_formats[f->index]->fourcc; 684 return 0; 685 } 686 687 static int isi_querycap(struct file *file, void *priv, 688 struct v4l2_capability *cap) 689 { 690 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 691 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 692 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 693 return 0; 694 } 695 696 static int isi_enum_input(struct file *file, void *priv, 697 struct v4l2_input *i) 698 { 699 if (i->index != 0) 700 return -EINVAL; 701 702 i->type = V4L2_INPUT_TYPE_CAMERA; 703 strscpy(i->name, "Camera", sizeof(i->name)); 704 return 0; 705 } 706 707 static int isi_g_input(struct file *file, void *priv, unsigned int *i) 708 { 709 *i = 0; 710 return 0; 711 } 712 713 static int isi_s_input(struct file *file, void *priv, unsigned int i) 714 { 715 if (i > 0) 716 return -EINVAL; 717 return 0; 718 } 719 720 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 721 { 722 struct atmel_isi *isi = video_drvdata(file); 723 724 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a); 725 } 726 727 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 728 { 729 struct atmel_isi *isi = video_drvdata(file); 730 731 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a); 732 } 733 734 static int isi_enum_framesizes(struct file *file, void *fh, 735 struct v4l2_frmsizeenum *fsize) 736 { 737 struct atmel_isi *isi = video_drvdata(file); 738 const struct isi_format *isi_fmt; 739 struct v4l2_subdev_frame_size_enum fse = { 740 .index = fsize->index, 741 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 742 }; 743 int ret; 744 745 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 746 if (!isi_fmt) 747 return -EINVAL; 748 749 fse.code = isi_fmt->mbus_code; 750 751 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 752 NULL, &fse); 753 if (ret) 754 return ret; 755 756 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 757 fsize->discrete.width = fse.max_width; 758 fsize->discrete.height = fse.max_height; 759 760 return 0; 761 } 762 763 static int isi_enum_frameintervals(struct file *file, void *fh, 764 struct v4l2_frmivalenum *fival) 765 { 766 struct atmel_isi *isi = video_drvdata(file); 767 const struct isi_format *isi_fmt; 768 struct v4l2_subdev_frame_interval_enum fie = { 769 .index = fival->index, 770 .width = fival->width, 771 .height = fival->height, 772 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 773 }; 774 int ret; 775 776 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 777 if (!isi_fmt) 778 return -EINVAL; 779 780 fie.code = isi_fmt->mbus_code; 781 782 ret = v4l2_subdev_call(isi->entity.subdev, pad, 783 enum_frame_interval, NULL, &fie); 784 if (ret) 785 return ret; 786 787 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 788 fival->discrete = fie.interval; 789 790 return 0; 791 } 792 793 static int isi_camera_set_bus_param(struct atmel_isi *isi) 794 { 795 u32 cfg1 = 0; 796 int ret; 797 798 /* set bus param for ISI */ 799 if (isi->pdata.hsync_act_low) 800 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 801 if (isi->pdata.vsync_act_low) 802 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 803 if (isi->pdata.pclk_act_falling) 804 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 805 if (isi->pdata.has_emb_sync) 806 cfg1 |= ISI_CFG1_EMB_SYNC; 807 if (isi->pdata.full_mode) 808 cfg1 |= ISI_CFG1_FULL_MODE; 809 810 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 811 812 /* Enable PM and peripheral clock before operate isi registers */ 813 ret = pm_runtime_resume_and_get(isi->dev); 814 if (ret < 0) 815 return ret; 816 817 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 818 isi_writel(isi, ISI_CFG1, cfg1); 819 820 pm_runtime_put(isi->dev); 821 822 return 0; 823 } 824 825 /* -----------------------------------------------------------------------*/ 826 static int atmel_isi_parse_dt(struct atmel_isi *isi, 827 struct platform_device *pdev) 828 { 829 struct device_node *np = pdev->dev.of_node; 830 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 }; 831 int err; 832 833 /* Default settings for ISI */ 834 isi->pdata.full_mode = 1; 835 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 836 837 np = of_graph_get_next_endpoint(np, NULL); 838 if (!np) { 839 dev_err(&pdev->dev, "Could not find the endpoint\n"); 840 return -EINVAL; 841 } 842 843 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep); 844 of_node_put(np); 845 if (err) { 846 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 847 return err; 848 } 849 850 switch (ep.bus.parallel.bus_width) { 851 case 8: 852 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 853 break; 854 case 10: 855 isi->pdata.data_width_flags = 856 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 857 break; 858 default: 859 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 860 ep.bus.parallel.bus_width); 861 return -EINVAL; 862 } 863 864 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 865 isi->pdata.hsync_act_low = true; 866 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 867 isi->pdata.vsync_act_low = true; 868 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 869 isi->pdata.pclk_act_falling = true; 870 871 if (ep.bus_type == V4L2_MBUS_BT656) 872 isi->pdata.has_emb_sync = true; 873 874 return 0; 875 } 876 877 static int isi_open(struct file *file) 878 { 879 struct atmel_isi *isi = video_drvdata(file); 880 struct v4l2_subdev *sd = isi->entity.subdev; 881 int ret; 882 883 if (mutex_lock_interruptible(&isi->lock)) 884 return -ERESTARTSYS; 885 886 ret = v4l2_fh_open(file); 887 if (ret < 0) 888 goto unlock; 889 890 if (!v4l2_fh_is_singular_file(file)) 891 goto fh_rel; 892 893 ret = v4l2_subdev_call(sd, core, s_power, 1); 894 if (ret < 0 && ret != -ENOIOCTLCMD) 895 goto fh_rel; 896 897 ret = isi_set_fmt(isi, &isi->fmt); 898 if (ret) 899 v4l2_subdev_call(sd, core, s_power, 0); 900 fh_rel: 901 if (ret) 902 v4l2_fh_release(file); 903 unlock: 904 mutex_unlock(&isi->lock); 905 return ret; 906 } 907 908 static int isi_release(struct file *file) 909 { 910 struct atmel_isi *isi = video_drvdata(file); 911 struct v4l2_subdev *sd = isi->entity.subdev; 912 bool fh_singular; 913 int ret; 914 915 mutex_lock(&isi->lock); 916 917 fh_singular = v4l2_fh_is_singular_file(file); 918 919 ret = _vb2_fop_release(file, NULL); 920 921 if (fh_singular) 922 v4l2_subdev_call(sd, core, s_power, 0); 923 924 mutex_unlock(&isi->lock); 925 926 return ret; 927 } 928 929 static const struct v4l2_ioctl_ops isi_ioctl_ops = { 930 .vidioc_querycap = isi_querycap, 931 932 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 933 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 934 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 935 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 936 937 .vidioc_enum_input = isi_enum_input, 938 .vidioc_g_input = isi_g_input, 939 .vidioc_s_input = isi_s_input, 940 941 .vidioc_g_parm = isi_g_parm, 942 .vidioc_s_parm = isi_s_parm, 943 .vidioc_enum_framesizes = isi_enum_framesizes, 944 .vidioc_enum_frameintervals = isi_enum_frameintervals, 945 946 .vidioc_reqbufs = vb2_ioctl_reqbufs, 947 .vidioc_create_bufs = vb2_ioctl_create_bufs, 948 .vidioc_querybuf = vb2_ioctl_querybuf, 949 .vidioc_qbuf = vb2_ioctl_qbuf, 950 .vidioc_dqbuf = vb2_ioctl_dqbuf, 951 .vidioc_expbuf = vb2_ioctl_expbuf, 952 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 953 .vidioc_streamon = vb2_ioctl_streamon, 954 .vidioc_streamoff = vb2_ioctl_streamoff, 955 956 .vidioc_log_status = v4l2_ctrl_log_status, 957 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 958 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 959 }; 960 961 static const struct v4l2_file_operations isi_fops = { 962 .owner = THIS_MODULE, 963 .unlocked_ioctl = video_ioctl2, 964 .open = isi_open, 965 .release = isi_release, 966 .poll = vb2_fop_poll, 967 .mmap = vb2_fop_mmap, 968 .read = vb2_fop_read, 969 }; 970 971 static int isi_set_default_fmt(struct atmel_isi *isi) 972 { 973 struct v4l2_format f = { 974 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 975 .fmt.pix = { 976 .width = VGA_WIDTH, 977 .height = VGA_HEIGHT, 978 .field = V4L2_FIELD_NONE, 979 .pixelformat = isi->user_formats[0]->fourcc, 980 }, 981 }; 982 int ret; 983 984 ret = isi_try_fmt(isi, &f, NULL); 985 if (ret) 986 return ret; 987 isi->current_fmt = isi->user_formats[0]; 988 isi->fmt = f; 989 return 0; 990 } 991 992 static const struct isi_format isi_formats[] = { 993 { 994 .fourcc = V4L2_PIX_FMT_YUYV, 995 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 996 .bpp = 2, 997 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 998 }, { 999 .fourcc = V4L2_PIX_FMT_YUYV, 1000 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 1001 .bpp = 2, 1002 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1003 }, { 1004 .fourcc = V4L2_PIX_FMT_YUYV, 1005 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1006 .bpp = 2, 1007 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1008 }, { 1009 .fourcc = V4L2_PIX_FMT_YUYV, 1010 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1011 .bpp = 2, 1012 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1013 }, { 1014 .fourcc = V4L2_PIX_FMT_RGB565, 1015 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 1016 .bpp = 2, 1017 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1018 }, { 1019 .fourcc = V4L2_PIX_FMT_RGB565, 1020 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 1021 .bpp = 2, 1022 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1023 }, { 1024 .fourcc = V4L2_PIX_FMT_RGB565, 1025 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1026 .bpp = 2, 1027 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 1028 }, { 1029 .fourcc = V4L2_PIX_FMT_RGB565, 1030 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1031 .bpp = 2, 1032 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1033 }, { 1034 .fourcc = V4L2_PIX_FMT_GREY, 1035 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1036 .bpp = 1, 1037 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1038 }, { 1039 .fourcc = V4L2_PIX_FMT_Y16, 1040 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1041 .bpp = 2, 1042 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1043 }, 1044 }; 1045 1046 static int isi_formats_init(struct atmel_isi *isi) 1047 { 1048 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 1049 unsigned int num_fmts = 0, i, j; 1050 struct v4l2_subdev *subdev = isi->entity.subdev; 1051 struct v4l2_subdev_mbus_code_enum mbus_code = { 1052 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1053 }; 1054 1055 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1056 NULL, &mbus_code)) { 1057 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1058 if (isi_formats[i].mbus_code != mbus_code.code) 1059 continue; 1060 1061 /* Code supported, have we got this fourcc yet? */ 1062 for (j = 0; j < num_fmts; j++) 1063 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1064 /* Already available */ 1065 break; 1066 if (j == num_fmts) 1067 /* new */ 1068 isi_fmts[num_fmts++] = isi_formats + i; 1069 } 1070 mbus_code.index++; 1071 } 1072 1073 if (!num_fmts) 1074 return -ENXIO; 1075 1076 isi->num_user_formats = num_fmts; 1077 isi->user_formats = devm_kcalloc(isi->dev, 1078 num_fmts, sizeof(struct isi_format *), 1079 GFP_KERNEL); 1080 if (!isi->user_formats) 1081 return -ENOMEM; 1082 1083 memcpy(isi->user_formats, isi_fmts, 1084 num_fmts * sizeof(struct isi_format *)); 1085 isi->current_fmt = isi->user_formats[0]; 1086 1087 return 0; 1088 } 1089 1090 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1091 { 1092 struct atmel_isi *isi = notifier_to_isi(notifier); 1093 int ret; 1094 1095 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1096 ret = isi_formats_init(isi); 1097 if (ret) { 1098 dev_err(isi->dev, "No supported mediabus format found\n"); 1099 return ret; 1100 } 1101 ret = isi_camera_set_bus_param(isi); 1102 if (ret) { 1103 dev_err(isi->dev, "Can't wake up device\n"); 1104 return ret; 1105 } 1106 1107 ret = isi_set_default_fmt(isi); 1108 if (ret) { 1109 dev_err(isi->dev, "Could not set default format\n"); 1110 return ret; 1111 } 1112 1113 ret = video_register_device(isi->vdev, VFL_TYPE_VIDEO, -1); 1114 if (ret) { 1115 dev_err(isi->dev, "Failed to register video device\n"); 1116 return ret; 1117 } 1118 1119 dev_dbg(isi->dev, "Device registered as %s\n", 1120 video_device_node_name(isi->vdev)); 1121 return 0; 1122 } 1123 1124 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1125 struct v4l2_subdev *sd, 1126 struct v4l2_async_connection *asd) 1127 { 1128 struct atmel_isi *isi = notifier_to_isi(notifier); 1129 1130 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1131 1132 /* Checks internally if vdev have been init or not */ 1133 video_unregister_device(isi->vdev); 1134 } 1135 1136 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1137 struct v4l2_subdev *subdev, 1138 struct v4l2_async_connection *asd) 1139 { 1140 struct atmel_isi *isi = notifier_to_isi(notifier); 1141 1142 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1143 1144 isi->entity.subdev = subdev; 1145 1146 return 0; 1147 } 1148 1149 static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { 1150 .bound = isi_graph_notify_bound, 1151 .unbind = isi_graph_notify_unbind, 1152 .complete = isi_graph_notify_complete, 1153 }; 1154 1155 static int isi_graph_init(struct atmel_isi *isi) 1156 { 1157 struct v4l2_async_connection *asd; 1158 struct device_node *ep; 1159 int ret; 1160 1161 ep = of_graph_get_next_endpoint(isi->dev->of_node, NULL); 1162 if (!ep) 1163 return -EINVAL; 1164 1165 v4l2_async_nf_init(&isi->notifier, &isi->v4l2_dev); 1166 1167 asd = v4l2_async_nf_add_fwnode_remote(&isi->notifier, 1168 of_fwnode_handle(ep), 1169 struct v4l2_async_connection); 1170 of_node_put(ep); 1171 1172 if (IS_ERR(asd)) 1173 return PTR_ERR(asd); 1174 1175 isi->notifier.ops = &isi_graph_notify_ops; 1176 1177 ret = v4l2_async_nf_register(&isi->notifier); 1178 if (ret < 0) { 1179 dev_err(isi->dev, "Notifier registration failed\n"); 1180 v4l2_async_nf_cleanup(&isi->notifier); 1181 return ret; 1182 } 1183 1184 return 0; 1185 } 1186 1187 1188 static int atmel_isi_probe(struct platform_device *pdev) 1189 { 1190 int irq; 1191 struct atmel_isi *isi; 1192 struct vb2_queue *q; 1193 int ret, i; 1194 1195 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1196 if (!isi) 1197 return -ENOMEM; 1198 1199 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1200 if (IS_ERR(isi->pclk)) 1201 return PTR_ERR(isi->pclk); 1202 1203 ret = atmel_isi_parse_dt(isi, pdev); 1204 if (ret) 1205 return ret; 1206 1207 isi->active = NULL; 1208 isi->dev = &pdev->dev; 1209 mutex_init(&isi->lock); 1210 spin_lock_init(&isi->irqlock); 1211 INIT_LIST_HEAD(&isi->video_buffer_list); 1212 INIT_LIST_HEAD(&isi->dma_desc_head); 1213 1214 q = &isi->queue; 1215 1216 /* Initialize the top-level structure */ 1217 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1218 if (ret) 1219 return ret; 1220 1221 isi->vdev = video_device_alloc(); 1222 if (!isi->vdev) { 1223 ret = -ENOMEM; 1224 goto err_vdev_alloc; 1225 } 1226 1227 /* video node */ 1228 isi->vdev->fops = &isi_fops; 1229 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1230 isi->vdev->queue = &isi->queue; 1231 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1232 isi->vdev->release = video_device_release; 1233 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1234 isi->vdev->lock = &isi->lock; 1235 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1236 V4L2_CAP_READWRITE; 1237 video_set_drvdata(isi->vdev, isi); 1238 1239 /* buffer queue */ 1240 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1241 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1242 q->lock = &isi->lock; 1243 q->drv_priv = isi; 1244 q->buf_struct_size = sizeof(struct frame_buffer); 1245 q->ops = &isi_video_qops; 1246 q->mem_ops = &vb2_dma_contig_memops; 1247 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1248 q->min_queued_buffers = 2; 1249 q->dev = &pdev->dev; 1250 1251 ret = vb2_queue_init(q); 1252 if (ret < 0) { 1253 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1254 goto err_vb2_queue; 1255 } 1256 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1257 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1258 &isi->fb_descriptors_phys, 1259 GFP_KERNEL); 1260 if (!isi->p_fb_descriptors) { 1261 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1262 ret = -ENOMEM; 1263 goto err_dma_alloc; 1264 } 1265 1266 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1267 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1268 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1269 i * sizeof(struct fbd); 1270 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1271 } 1272 1273 isi->regs = devm_platform_ioremap_resource(pdev, 0); 1274 if (IS_ERR(isi->regs)) { 1275 ret = PTR_ERR(isi->regs); 1276 goto err_ioremap; 1277 } 1278 1279 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1280 isi->width_flags = 1 << 7; 1281 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1282 isi->width_flags |= 1 << 9; 1283 1284 irq = platform_get_irq(pdev, 0); 1285 if (irq < 0) { 1286 ret = irq; 1287 goto err_req_irq; 1288 } 1289 1290 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1291 if (ret) { 1292 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1293 goto err_req_irq; 1294 } 1295 isi->irq = irq; 1296 1297 ret = isi_graph_init(isi); 1298 if (ret < 0) 1299 goto err_req_irq; 1300 1301 pm_suspend_ignore_children(&pdev->dev, true); 1302 pm_runtime_enable(&pdev->dev); 1303 platform_set_drvdata(pdev, isi); 1304 return 0; 1305 1306 err_req_irq: 1307 err_ioremap: 1308 dma_free_coherent(&pdev->dev, 1309 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1310 isi->p_fb_descriptors, 1311 isi->fb_descriptors_phys); 1312 err_dma_alloc: 1313 err_vb2_queue: 1314 video_device_release(isi->vdev); 1315 err_vdev_alloc: 1316 v4l2_device_unregister(&isi->v4l2_dev); 1317 1318 return ret; 1319 } 1320 1321 static void atmel_isi_remove(struct platform_device *pdev) 1322 { 1323 struct atmel_isi *isi = platform_get_drvdata(pdev); 1324 1325 dma_free_coherent(&pdev->dev, 1326 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1327 isi->p_fb_descriptors, 1328 isi->fb_descriptors_phys); 1329 pm_runtime_disable(&pdev->dev); 1330 v4l2_async_nf_unregister(&isi->notifier); 1331 v4l2_async_nf_cleanup(&isi->notifier); 1332 v4l2_device_unregister(&isi->v4l2_dev); 1333 } 1334 1335 #ifdef CONFIG_PM 1336 static int atmel_isi_runtime_suspend(struct device *dev) 1337 { 1338 struct atmel_isi *isi = dev_get_drvdata(dev); 1339 1340 clk_disable_unprepare(isi->pclk); 1341 1342 return 0; 1343 } 1344 static int atmel_isi_runtime_resume(struct device *dev) 1345 { 1346 struct atmel_isi *isi = dev_get_drvdata(dev); 1347 1348 return clk_prepare_enable(isi->pclk); 1349 } 1350 #endif /* CONFIG_PM */ 1351 1352 static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1353 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1354 atmel_isi_runtime_resume, NULL) 1355 }; 1356 1357 static const struct of_device_id atmel_isi_of_match[] = { 1358 { .compatible = "atmel,at91sam9g45-isi" }, 1359 { } 1360 }; 1361 MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1362 1363 static struct platform_driver atmel_isi_driver = { 1364 .driver = { 1365 .name = "atmel_isi", 1366 .of_match_table = of_match_ptr(atmel_isi_of_match), 1367 .pm = &atmel_isi_dev_pm_ops, 1368 }, 1369 .probe = atmel_isi_probe, 1370 .remove_new = atmel_isi_remove, 1371 }; 1372 1373 module_platform_driver(atmel_isi_driver); 1374 1375 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1376 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1377 MODULE_LICENSE("GPL"); 1378