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_get_pad_crop(isi->entity.subdev, 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 .pads = &pad_cfg, 593 }; 594 struct v4l2_subdev_format format = { 595 .which = V4L2_SUBDEV_FORMAT_TRY, 596 }; 597 int ret; 598 599 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 600 if (!isi_fmt) { 601 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 602 pixfmt->pixelformat = isi_fmt->fourcc; 603 } 604 605 /* Limit to Atmel ISI hardware capabilities */ 606 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); 607 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); 608 609 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 610 611 isi_try_fse(isi, isi_fmt, &pad_state); 612 613 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 614 &pad_state, &format); 615 if (ret < 0) 616 return ret; 617 618 v4l2_fill_pix_format(pixfmt, &format.format); 619 620 pixfmt->field = V4L2_FIELD_NONE; 621 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 622 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 623 624 if (current_fmt) 625 *current_fmt = isi_fmt; 626 627 return 0; 628 } 629 630 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 631 { 632 struct v4l2_subdev_format format = { 633 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 634 }; 635 const struct isi_format *current_fmt; 636 int ret; 637 638 ret = isi_try_fmt(isi, f, ¤t_fmt); 639 if (ret) 640 return ret; 641 642 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 643 current_fmt->mbus_code); 644 ret = v4l2_subdev_call(isi->entity.subdev, pad, 645 set_fmt, NULL, &format); 646 if (ret < 0) 647 return ret; 648 649 isi->fmt = *f; 650 isi->current_fmt = current_fmt; 651 652 return 0; 653 } 654 655 static int isi_s_fmt_vid_cap(struct file *file, void *priv, 656 struct v4l2_format *f) 657 { 658 struct atmel_isi *isi = video_drvdata(file); 659 660 if (vb2_is_streaming(&isi->queue)) 661 return -EBUSY; 662 663 return isi_set_fmt(isi, f); 664 } 665 666 static int isi_try_fmt_vid_cap(struct file *file, void *priv, 667 struct v4l2_format *f) 668 { 669 struct atmel_isi *isi = video_drvdata(file); 670 671 return isi_try_fmt(isi, f, NULL); 672 } 673 674 static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 675 struct v4l2_fmtdesc *f) 676 { 677 struct atmel_isi *isi = video_drvdata(file); 678 679 if (f->index >= isi->num_user_formats) 680 return -EINVAL; 681 682 f->pixelformat = isi->user_formats[f->index]->fourcc; 683 return 0; 684 } 685 686 static int isi_querycap(struct file *file, void *priv, 687 struct v4l2_capability *cap) 688 { 689 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 690 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 691 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 692 return 0; 693 } 694 695 static int isi_enum_input(struct file *file, void *priv, 696 struct v4l2_input *i) 697 { 698 if (i->index != 0) 699 return -EINVAL; 700 701 i->type = V4L2_INPUT_TYPE_CAMERA; 702 strscpy(i->name, "Camera", sizeof(i->name)); 703 return 0; 704 } 705 706 static int isi_g_input(struct file *file, void *priv, unsigned int *i) 707 { 708 *i = 0; 709 return 0; 710 } 711 712 static int isi_s_input(struct file *file, void *priv, unsigned int i) 713 { 714 if (i > 0) 715 return -EINVAL; 716 return 0; 717 } 718 719 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 720 { 721 struct atmel_isi *isi = video_drvdata(file); 722 723 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a); 724 } 725 726 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 727 { 728 struct atmel_isi *isi = video_drvdata(file); 729 730 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a); 731 } 732 733 static int isi_enum_framesizes(struct file *file, void *fh, 734 struct v4l2_frmsizeenum *fsize) 735 { 736 struct atmel_isi *isi = video_drvdata(file); 737 const struct isi_format *isi_fmt; 738 struct v4l2_subdev_frame_size_enum fse = { 739 .index = fsize->index, 740 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 741 }; 742 int ret; 743 744 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 745 if (!isi_fmt) 746 return -EINVAL; 747 748 fse.code = isi_fmt->mbus_code; 749 750 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 751 NULL, &fse); 752 if (ret) 753 return ret; 754 755 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 756 fsize->discrete.width = fse.max_width; 757 fsize->discrete.height = fse.max_height; 758 759 return 0; 760 } 761 762 static int isi_enum_frameintervals(struct file *file, void *fh, 763 struct v4l2_frmivalenum *fival) 764 { 765 struct atmel_isi *isi = video_drvdata(file); 766 const struct isi_format *isi_fmt; 767 struct v4l2_subdev_frame_interval_enum fie = { 768 .index = fival->index, 769 .width = fival->width, 770 .height = fival->height, 771 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 772 }; 773 int ret; 774 775 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 776 if (!isi_fmt) 777 return -EINVAL; 778 779 fie.code = isi_fmt->mbus_code; 780 781 ret = v4l2_subdev_call(isi->entity.subdev, pad, 782 enum_frame_interval, NULL, &fie); 783 if (ret) 784 return ret; 785 786 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 787 fival->discrete = fie.interval; 788 789 return 0; 790 } 791 792 static int isi_camera_set_bus_param(struct atmel_isi *isi) 793 { 794 u32 cfg1 = 0; 795 int ret; 796 797 /* set bus param for ISI */ 798 if (isi->pdata.hsync_act_low) 799 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 800 if (isi->pdata.vsync_act_low) 801 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 802 if (isi->pdata.pclk_act_falling) 803 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 804 if (isi->pdata.has_emb_sync) 805 cfg1 |= ISI_CFG1_EMB_SYNC; 806 if (isi->pdata.full_mode) 807 cfg1 |= ISI_CFG1_FULL_MODE; 808 809 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 810 811 /* Enable PM and peripheral clock before operate isi registers */ 812 ret = pm_runtime_resume_and_get(isi->dev); 813 if (ret < 0) 814 return ret; 815 816 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 817 isi_writel(isi, ISI_CFG1, cfg1); 818 819 pm_runtime_put(isi->dev); 820 821 return 0; 822 } 823 824 /* -----------------------------------------------------------------------*/ 825 static int atmel_isi_parse_dt(struct atmel_isi *isi, 826 struct platform_device *pdev) 827 { 828 struct device_node *np = pdev->dev.of_node; 829 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 }; 830 int err; 831 832 /* Default settings for ISI */ 833 isi->pdata.full_mode = 1; 834 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 835 836 np = of_graph_get_next_endpoint(np, NULL); 837 if (!np) { 838 dev_err(&pdev->dev, "Could not find the endpoint\n"); 839 return -EINVAL; 840 } 841 842 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep); 843 of_node_put(np); 844 if (err) { 845 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 846 return err; 847 } 848 849 switch (ep.bus.parallel.bus_width) { 850 case 8: 851 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 852 break; 853 case 10: 854 isi->pdata.data_width_flags = 855 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 856 break; 857 default: 858 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 859 ep.bus.parallel.bus_width); 860 return -EINVAL; 861 } 862 863 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 864 isi->pdata.hsync_act_low = true; 865 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 866 isi->pdata.vsync_act_low = true; 867 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 868 isi->pdata.pclk_act_falling = true; 869 870 if (ep.bus_type == V4L2_MBUS_BT656) 871 isi->pdata.has_emb_sync = true; 872 873 return 0; 874 } 875 876 static int isi_open(struct file *file) 877 { 878 struct atmel_isi *isi = video_drvdata(file); 879 struct v4l2_subdev *sd = isi->entity.subdev; 880 int ret; 881 882 if (mutex_lock_interruptible(&isi->lock)) 883 return -ERESTARTSYS; 884 885 ret = v4l2_fh_open(file); 886 if (ret < 0) 887 goto unlock; 888 889 if (!v4l2_fh_is_singular_file(file)) 890 goto fh_rel; 891 892 ret = v4l2_subdev_call(sd, core, s_power, 1); 893 if (ret < 0 && ret != -ENOIOCTLCMD) 894 goto fh_rel; 895 896 ret = isi_set_fmt(isi, &isi->fmt); 897 if (ret) 898 v4l2_subdev_call(sd, core, s_power, 0); 899 fh_rel: 900 if (ret) 901 v4l2_fh_release(file); 902 unlock: 903 mutex_unlock(&isi->lock); 904 return ret; 905 } 906 907 static int isi_release(struct file *file) 908 { 909 struct atmel_isi *isi = video_drvdata(file); 910 struct v4l2_subdev *sd = isi->entity.subdev; 911 bool fh_singular; 912 int ret; 913 914 mutex_lock(&isi->lock); 915 916 fh_singular = v4l2_fh_is_singular_file(file); 917 918 ret = _vb2_fop_release(file, NULL); 919 920 if (fh_singular) 921 v4l2_subdev_call(sd, core, s_power, 0); 922 923 mutex_unlock(&isi->lock); 924 925 return ret; 926 } 927 928 static const struct v4l2_ioctl_ops isi_ioctl_ops = { 929 .vidioc_querycap = isi_querycap, 930 931 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 932 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 933 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 934 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 935 936 .vidioc_enum_input = isi_enum_input, 937 .vidioc_g_input = isi_g_input, 938 .vidioc_s_input = isi_s_input, 939 940 .vidioc_g_parm = isi_g_parm, 941 .vidioc_s_parm = isi_s_parm, 942 .vidioc_enum_framesizes = isi_enum_framesizes, 943 .vidioc_enum_frameintervals = isi_enum_frameintervals, 944 945 .vidioc_reqbufs = vb2_ioctl_reqbufs, 946 .vidioc_create_bufs = vb2_ioctl_create_bufs, 947 .vidioc_querybuf = vb2_ioctl_querybuf, 948 .vidioc_qbuf = vb2_ioctl_qbuf, 949 .vidioc_dqbuf = vb2_ioctl_dqbuf, 950 .vidioc_expbuf = vb2_ioctl_expbuf, 951 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 952 .vidioc_streamon = vb2_ioctl_streamon, 953 .vidioc_streamoff = vb2_ioctl_streamoff, 954 955 .vidioc_log_status = v4l2_ctrl_log_status, 956 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 957 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 958 }; 959 960 static const struct v4l2_file_operations isi_fops = { 961 .owner = THIS_MODULE, 962 .unlocked_ioctl = video_ioctl2, 963 .open = isi_open, 964 .release = isi_release, 965 .poll = vb2_fop_poll, 966 .mmap = vb2_fop_mmap, 967 .read = vb2_fop_read, 968 }; 969 970 static int isi_set_default_fmt(struct atmel_isi *isi) 971 { 972 struct v4l2_format f = { 973 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 974 .fmt.pix = { 975 .width = VGA_WIDTH, 976 .height = VGA_HEIGHT, 977 .field = V4L2_FIELD_NONE, 978 .pixelformat = isi->user_formats[0]->fourcc, 979 }, 980 }; 981 int ret; 982 983 ret = isi_try_fmt(isi, &f, NULL); 984 if (ret) 985 return ret; 986 isi->current_fmt = isi->user_formats[0]; 987 isi->fmt = f; 988 return 0; 989 } 990 991 static const struct isi_format isi_formats[] = { 992 { 993 .fourcc = V4L2_PIX_FMT_YUYV, 994 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 995 .bpp = 2, 996 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 997 }, { 998 .fourcc = V4L2_PIX_FMT_YUYV, 999 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 1000 .bpp = 2, 1001 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1002 }, { 1003 .fourcc = V4L2_PIX_FMT_YUYV, 1004 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1005 .bpp = 2, 1006 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1007 }, { 1008 .fourcc = V4L2_PIX_FMT_YUYV, 1009 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1010 .bpp = 2, 1011 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1012 }, { 1013 .fourcc = V4L2_PIX_FMT_RGB565, 1014 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 1015 .bpp = 2, 1016 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1017 }, { 1018 .fourcc = V4L2_PIX_FMT_RGB565, 1019 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 1020 .bpp = 2, 1021 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1022 }, { 1023 .fourcc = V4L2_PIX_FMT_RGB565, 1024 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1025 .bpp = 2, 1026 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 1027 }, { 1028 .fourcc = V4L2_PIX_FMT_RGB565, 1029 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1030 .bpp = 2, 1031 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1032 }, { 1033 .fourcc = V4L2_PIX_FMT_GREY, 1034 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1035 .bpp = 1, 1036 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1037 }, { 1038 .fourcc = V4L2_PIX_FMT_Y16, 1039 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1040 .bpp = 2, 1041 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1042 }, 1043 }; 1044 1045 static int isi_formats_init(struct atmel_isi *isi) 1046 { 1047 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 1048 unsigned int num_fmts = 0, i, j; 1049 struct v4l2_subdev *subdev = isi->entity.subdev; 1050 struct v4l2_subdev_mbus_code_enum mbus_code = { 1051 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1052 }; 1053 1054 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1055 NULL, &mbus_code)) { 1056 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1057 if (isi_formats[i].mbus_code != mbus_code.code) 1058 continue; 1059 1060 /* Code supported, have we got this fourcc yet? */ 1061 for (j = 0; j < num_fmts; j++) 1062 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1063 /* Already available */ 1064 break; 1065 if (j == num_fmts) 1066 /* new */ 1067 isi_fmts[num_fmts++] = isi_formats + i; 1068 } 1069 mbus_code.index++; 1070 } 1071 1072 if (!num_fmts) 1073 return -ENXIO; 1074 1075 isi->num_user_formats = num_fmts; 1076 isi->user_formats = devm_kcalloc(isi->dev, 1077 num_fmts, sizeof(struct isi_format *), 1078 GFP_KERNEL); 1079 if (!isi->user_formats) 1080 return -ENOMEM; 1081 1082 memcpy(isi->user_formats, isi_fmts, 1083 num_fmts * sizeof(struct isi_format *)); 1084 isi->current_fmt = isi->user_formats[0]; 1085 1086 return 0; 1087 } 1088 1089 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1090 { 1091 struct atmel_isi *isi = notifier_to_isi(notifier); 1092 int ret; 1093 1094 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1095 ret = isi_formats_init(isi); 1096 if (ret) { 1097 dev_err(isi->dev, "No supported mediabus format found\n"); 1098 return ret; 1099 } 1100 ret = isi_camera_set_bus_param(isi); 1101 if (ret) { 1102 dev_err(isi->dev, "Can't wake up device\n"); 1103 return ret; 1104 } 1105 1106 ret = isi_set_default_fmt(isi); 1107 if (ret) { 1108 dev_err(isi->dev, "Could not set default format\n"); 1109 return ret; 1110 } 1111 1112 ret = video_register_device(isi->vdev, VFL_TYPE_VIDEO, -1); 1113 if (ret) { 1114 dev_err(isi->dev, "Failed to register video device\n"); 1115 return ret; 1116 } 1117 1118 dev_dbg(isi->dev, "Device registered as %s\n", 1119 video_device_node_name(isi->vdev)); 1120 return 0; 1121 } 1122 1123 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1124 struct v4l2_subdev *sd, 1125 struct v4l2_async_connection *asd) 1126 { 1127 struct atmel_isi *isi = notifier_to_isi(notifier); 1128 1129 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1130 1131 /* Checks internally if vdev have been init or not */ 1132 video_unregister_device(isi->vdev); 1133 } 1134 1135 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1136 struct v4l2_subdev *subdev, 1137 struct v4l2_async_connection *asd) 1138 { 1139 struct atmel_isi *isi = notifier_to_isi(notifier); 1140 1141 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1142 1143 isi->entity.subdev = subdev; 1144 1145 return 0; 1146 } 1147 1148 static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { 1149 .bound = isi_graph_notify_bound, 1150 .unbind = isi_graph_notify_unbind, 1151 .complete = isi_graph_notify_complete, 1152 }; 1153 1154 static int isi_graph_init(struct atmel_isi *isi) 1155 { 1156 struct v4l2_async_connection *asd; 1157 struct device_node *ep; 1158 int ret; 1159 1160 ep = of_graph_get_next_endpoint(isi->dev->of_node, NULL); 1161 if (!ep) 1162 return -EINVAL; 1163 1164 v4l2_async_nf_init(&isi->notifier, &isi->v4l2_dev); 1165 1166 asd = v4l2_async_nf_add_fwnode_remote(&isi->notifier, 1167 of_fwnode_handle(ep), 1168 struct v4l2_async_connection); 1169 of_node_put(ep); 1170 1171 if (IS_ERR(asd)) 1172 return PTR_ERR(asd); 1173 1174 isi->notifier.ops = &isi_graph_notify_ops; 1175 1176 ret = v4l2_async_nf_register(&isi->notifier); 1177 if (ret < 0) { 1178 dev_err(isi->dev, "Notifier registration failed\n"); 1179 v4l2_async_nf_cleanup(&isi->notifier); 1180 return ret; 1181 } 1182 1183 return 0; 1184 } 1185 1186 1187 static int atmel_isi_probe(struct platform_device *pdev) 1188 { 1189 int irq; 1190 struct atmel_isi *isi; 1191 struct vb2_queue *q; 1192 int ret, i; 1193 1194 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1195 if (!isi) 1196 return -ENOMEM; 1197 1198 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1199 if (IS_ERR(isi->pclk)) 1200 return PTR_ERR(isi->pclk); 1201 1202 ret = atmel_isi_parse_dt(isi, pdev); 1203 if (ret) 1204 return ret; 1205 1206 isi->active = NULL; 1207 isi->dev = &pdev->dev; 1208 mutex_init(&isi->lock); 1209 spin_lock_init(&isi->irqlock); 1210 INIT_LIST_HEAD(&isi->video_buffer_list); 1211 INIT_LIST_HEAD(&isi->dma_desc_head); 1212 1213 q = &isi->queue; 1214 1215 /* Initialize the top-level structure */ 1216 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1217 if (ret) 1218 return ret; 1219 1220 isi->vdev = video_device_alloc(); 1221 if (!isi->vdev) { 1222 ret = -ENOMEM; 1223 goto err_vdev_alloc; 1224 } 1225 1226 /* video node */ 1227 isi->vdev->fops = &isi_fops; 1228 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1229 isi->vdev->queue = &isi->queue; 1230 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1231 isi->vdev->release = video_device_release; 1232 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1233 isi->vdev->lock = &isi->lock; 1234 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1235 V4L2_CAP_READWRITE; 1236 video_set_drvdata(isi->vdev, isi); 1237 1238 /* buffer queue */ 1239 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1240 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1241 q->lock = &isi->lock; 1242 q->drv_priv = isi; 1243 q->buf_struct_size = sizeof(struct frame_buffer); 1244 q->ops = &isi_video_qops; 1245 q->mem_ops = &vb2_dma_contig_memops; 1246 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1247 q->min_buffers_needed = 2; 1248 q->dev = &pdev->dev; 1249 1250 ret = vb2_queue_init(q); 1251 if (ret < 0) { 1252 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1253 goto err_vb2_queue; 1254 } 1255 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1256 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1257 &isi->fb_descriptors_phys, 1258 GFP_KERNEL); 1259 if (!isi->p_fb_descriptors) { 1260 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1261 ret = -ENOMEM; 1262 goto err_dma_alloc; 1263 } 1264 1265 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1266 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1267 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1268 i * sizeof(struct fbd); 1269 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1270 } 1271 1272 isi->regs = devm_platform_ioremap_resource(pdev, 0); 1273 if (IS_ERR(isi->regs)) { 1274 ret = PTR_ERR(isi->regs); 1275 goto err_ioremap; 1276 } 1277 1278 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1279 isi->width_flags = 1 << 7; 1280 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1281 isi->width_flags |= 1 << 9; 1282 1283 irq = platform_get_irq(pdev, 0); 1284 if (irq < 0) { 1285 ret = irq; 1286 goto err_req_irq; 1287 } 1288 1289 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1290 if (ret) { 1291 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1292 goto err_req_irq; 1293 } 1294 isi->irq = irq; 1295 1296 ret = isi_graph_init(isi); 1297 if (ret < 0) 1298 goto err_req_irq; 1299 1300 pm_suspend_ignore_children(&pdev->dev, true); 1301 pm_runtime_enable(&pdev->dev); 1302 platform_set_drvdata(pdev, isi); 1303 return 0; 1304 1305 err_req_irq: 1306 err_ioremap: 1307 dma_free_coherent(&pdev->dev, 1308 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1309 isi->p_fb_descriptors, 1310 isi->fb_descriptors_phys); 1311 err_dma_alloc: 1312 err_vb2_queue: 1313 video_device_release(isi->vdev); 1314 err_vdev_alloc: 1315 v4l2_device_unregister(&isi->v4l2_dev); 1316 1317 return ret; 1318 } 1319 1320 static void atmel_isi_remove(struct platform_device *pdev) 1321 { 1322 struct atmel_isi *isi = platform_get_drvdata(pdev); 1323 1324 dma_free_coherent(&pdev->dev, 1325 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1326 isi->p_fb_descriptors, 1327 isi->fb_descriptors_phys); 1328 pm_runtime_disable(&pdev->dev); 1329 v4l2_async_nf_unregister(&isi->notifier); 1330 v4l2_async_nf_cleanup(&isi->notifier); 1331 v4l2_device_unregister(&isi->v4l2_dev); 1332 } 1333 1334 #ifdef CONFIG_PM 1335 static int atmel_isi_runtime_suspend(struct device *dev) 1336 { 1337 struct atmel_isi *isi = dev_get_drvdata(dev); 1338 1339 clk_disable_unprepare(isi->pclk); 1340 1341 return 0; 1342 } 1343 static int atmel_isi_runtime_resume(struct device *dev) 1344 { 1345 struct atmel_isi *isi = dev_get_drvdata(dev); 1346 1347 return clk_prepare_enable(isi->pclk); 1348 } 1349 #endif /* CONFIG_PM */ 1350 1351 static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1352 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1353 atmel_isi_runtime_resume, NULL) 1354 }; 1355 1356 static const struct of_device_id atmel_isi_of_match[] = { 1357 { .compatible = "atmel,at91sam9g45-isi" }, 1358 { } 1359 }; 1360 MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1361 1362 static struct platform_driver atmel_isi_driver = { 1363 .driver = { 1364 .name = "atmel_isi", 1365 .of_match_table = of_match_ptr(atmel_isi_of_match), 1366 .pm = &atmel_isi_dev_pm_ops, 1367 }, 1368 .probe = atmel_isi_probe, 1369 .remove_new = atmel_isi_remove, 1370 }; 1371 1372 module_platform_driver(atmel_isi_driver); 1373 1374 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1375 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1376 MODULE_LICENSE("GPL"); 1377