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 */ 43struct 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 52static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl) 53{ 54 fb_desc->dma_ctrl = ctrl; 55} 56 57struct 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 */ 64struct frame_buffer { 65 struct vb2_v4l2_buffer vb; 66 struct isi_dma_desc *p_dma_desc; 67 struct list_head list; 68}; 69 70struct 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 */ 85struct isi_format { 86 u32 fourcc; 87 u32 mbus_code; 88 u8 bpp; 89 u32 swap; 90}; 91 92 93struct 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 135static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) 136{ 137 writel(val, isi->regs + reg); 138} 139static u32 isi_readl(struct atmel_isi *isi, u32 reg) 140{ 141 return readl(isi->regs + reg); 142} 143 144static 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 174static 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 */ 211static 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 243static 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 ------------------------------------------------------------------*/ 271static 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 295static 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 306static 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 347static 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 358static 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 401static 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 419static 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 457err_reset: 458 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); 459 460err_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 */ 476static 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 521static 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 533static 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 543static 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 559static void isi_try_fse(struct atmel_isi *isi, const struct isi_format *isi_fmt, 560 struct v4l2_subdev_state *sd_state) 561{ 562 int ret; 563 struct v4l2_subdev_frame_size_enum fse = { 564 .code = isi_fmt->mbus_code, 565 .which = V4L2_SUBDEV_FORMAT_TRY, 566 }; 567 568 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 569 sd_state, &fse); 570 /* 571 * Attempt to obtain format size from subdev. If not available, 572 * just use the maximum ISI can receive. 573 */ 574 if (ret) { 575 sd_state->pads->try_crop.width = MAX_SUPPORT_WIDTH; 576 sd_state->pads->try_crop.height = MAX_SUPPORT_HEIGHT; 577 } else { 578 sd_state->pads->try_crop.width = fse.max_width; 579 sd_state->pads->try_crop.height = fse.max_height; 580 } 581} 582 583static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, 584 const struct isi_format **current_fmt) 585{ 586 const struct isi_format *isi_fmt; 587 struct v4l2_pix_format *pixfmt = &f->fmt.pix; 588 struct v4l2_subdev_pad_config pad_cfg = {}; 589 struct v4l2_subdev_state pad_state = { 590 .pads = &pad_cfg, 591 }; 592 struct v4l2_subdev_format format = { 593 .which = V4L2_SUBDEV_FORMAT_TRY, 594 }; 595 int ret; 596 597 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat); 598 if (!isi_fmt) { 599 isi_fmt = isi->user_formats[isi->num_user_formats - 1]; 600 pixfmt->pixelformat = isi_fmt->fourcc; 601 } 602 603 /* Limit to Atmel ISI hardware capabilities */ 604 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); 605 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); 606 607 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code); 608 609 isi_try_fse(isi, isi_fmt, &pad_state); 610 611 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, 612 &pad_state, &format); 613 if (ret < 0) 614 return ret; 615 616 v4l2_fill_pix_format(pixfmt, &format.format); 617 618 pixfmt->field = V4L2_FIELD_NONE; 619 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; 620 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; 621 622 if (current_fmt) 623 *current_fmt = isi_fmt; 624 625 return 0; 626} 627 628static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) 629{ 630 struct v4l2_subdev_format format = { 631 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 632 }; 633 const struct isi_format *current_fmt; 634 int ret; 635 636 ret = isi_try_fmt(isi, f, ¤t_fmt); 637 if (ret) 638 return ret; 639 640 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, 641 current_fmt->mbus_code); 642 ret = v4l2_subdev_call(isi->entity.subdev, pad, 643 set_fmt, NULL, &format); 644 if (ret < 0) 645 return ret; 646 647 isi->fmt = *f; 648 isi->current_fmt = current_fmt; 649 650 return 0; 651} 652 653static int isi_s_fmt_vid_cap(struct file *file, void *priv, 654 struct v4l2_format *f) 655{ 656 struct atmel_isi *isi = video_drvdata(file); 657 658 if (vb2_is_streaming(&isi->queue)) 659 return -EBUSY; 660 661 return isi_set_fmt(isi, f); 662} 663 664static int isi_try_fmt_vid_cap(struct file *file, void *priv, 665 struct v4l2_format *f) 666{ 667 struct atmel_isi *isi = video_drvdata(file); 668 669 return isi_try_fmt(isi, f, NULL); 670} 671 672static int isi_enum_fmt_vid_cap(struct file *file, void *priv, 673 struct v4l2_fmtdesc *f) 674{ 675 struct atmel_isi *isi = video_drvdata(file); 676 677 if (f->index >= isi->num_user_formats) 678 return -EINVAL; 679 680 f->pixelformat = isi->user_formats[f->index]->fourcc; 681 return 0; 682} 683 684static int isi_querycap(struct file *file, void *priv, 685 struct v4l2_capability *cap) 686{ 687 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver)); 688 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card)); 689 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info)); 690 return 0; 691} 692 693static int isi_enum_input(struct file *file, void *priv, 694 struct v4l2_input *i) 695{ 696 if (i->index != 0) 697 return -EINVAL; 698 699 i->type = V4L2_INPUT_TYPE_CAMERA; 700 strscpy(i->name, "Camera", sizeof(i->name)); 701 return 0; 702} 703 704static int isi_g_input(struct file *file, void *priv, unsigned int *i) 705{ 706 *i = 0; 707 return 0; 708} 709 710static int isi_s_input(struct file *file, void *priv, unsigned int i) 711{ 712 if (i > 0) 713 return -EINVAL; 714 return 0; 715} 716 717static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 718{ 719 struct atmel_isi *isi = video_drvdata(file); 720 721 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a); 722} 723 724static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 725{ 726 struct atmel_isi *isi = video_drvdata(file); 727 728 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a); 729} 730 731static int isi_enum_framesizes(struct file *file, void *fh, 732 struct v4l2_frmsizeenum *fsize) 733{ 734 struct atmel_isi *isi = video_drvdata(file); 735 const struct isi_format *isi_fmt; 736 struct v4l2_subdev_frame_size_enum fse = { 737 .index = fsize->index, 738 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 739 }; 740 int ret; 741 742 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format); 743 if (!isi_fmt) 744 return -EINVAL; 745 746 fse.code = isi_fmt->mbus_code; 747 748 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, 749 NULL, &fse); 750 if (ret) 751 return ret; 752 753 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 754 fsize->discrete.width = fse.max_width; 755 fsize->discrete.height = fse.max_height; 756 757 return 0; 758} 759 760static int isi_enum_frameintervals(struct file *file, void *fh, 761 struct v4l2_frmivalenum *fival) 762{ 763 struct atmel_isi *isi = video_drvdata(file); 764 const struct isi_format *isi_fmt; 765 struct v4l2_subdev_frame_interval_enum fie = { 766 .index = fival->index, 767 .width = fival->width, 768 .height = fival->height, 769 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 770 }; 771 int ret; 772 773 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format); 774 if (!isi_fmt) 775 return -EINVAL; 776 777 fie.code = isi_fmt->mbus_code; 778 779 ret = v4l2_subdev_call(isi->entity.subdev, pad, 780 enum_frame_interval, NULL, &fie); 781 if (ret) 782 return ret; 783 784 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 785 fival->discrete = fie.interval; 786 787 return 0; 788} 789 790static int isi_camera_set_bus_param(struct atmel_isi *isi) 791{ 792 u32 cfg1 = 0; 793 int ret; 794 795 /* set bus param for ISI */ 796 if (isi->pdata.hsync_act_low) 797 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; 798 if (isi->pdata.vsync_act_low) 799 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; 800 if (isi->pdata.pclk_act_falling) 801 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; 802 if (isi->pdata.has_emb_sync) 803 cfg1 |= ISI_CFG1_EMB_SYNC; 804 if (isi->pdata.full_mode) 805 cfg1 |= ISI_CFG1_FULL_MODE; 806 807 cfg1 |= ISI_CFG1_THMASK_BEATS_16; 808 809 /* Enable PM and peripheral clock before operate isi registers */ 810 ret = pm_runtime_resume_and_get(isi->dev); 811 if (ret < 0) 812 return ret; 813 814 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); 815 isi_writel(isi, ISI_CFG1, cfg1); 816 817 pm_runtime_put(isi->dev); 818 819 return 0; 820} 821 822/* -----------------------------------------------------------------------*/ 823static int atmel_isi_parse_dt(struct atmel_isi *isi, 824 struct platform_device *pdev) 825{ 826 struct device_node *np = pdev->dev.of_node; 827 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 }; 828 int err; 829 830 /* Default settings for ISI */ 831 isi->pdata.full_mode = 1; 832 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; 833 834 np = of_graph_get_next_endpoint(np, NULL); 835 if (!np) { 836 dev_err(&pdev->dev, "Could not find the endpoint\n"); 837 return -EINVAL; 838 } 839 840 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep); 841 of_node_put(np); 842 if (err) { 843 dev_err(&pdev->dev, "Could not parse the endpoint\n"); 844 return err; 845 } 846 847 switch (ep.bus.parallel.bus_width) { 848 case 8: 849 isi->pdata.data_width_flags = ISI_DATAWIDTH_8; 850 break; 851 case 10: 852 isi->pdata.data_width_flags = 853 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; 854 break; 855 default: 856 dev_err(&pdev->dev, "Unsupported bus width: %d\n", 857 ep.bus.parallel.bus_width); 858 return -EINVAL; 859 } 860 861 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 862 isi->pdata.hsync_act_low = true; 863 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 864 isi->pdata.vsync_act_low = true; 865 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 866 isi->pdata.pclk_act_falling = true; 867 868 if (ep.bus_type == V4L2_MBUS_BT656) 869 isi->pdata.has_emb_sync = true; 870 871 return 0; 872} 873 874static int isi_open(struct file *file) 875{ 876 struct atmel_isi *isi = video_drvdata(file); 877 struct v4l2_subdev *sd = isi->entity.subdev; 878 int ret; 879 880 if (mutex_lock_interruptible(&isi->lock)) 881 return -ERESTARTSYS; 882 883 ret = v4l2_fh_open(file); 884 if (ret < 0) 885 goto unlock; 886 887 if (!v4l2_fh_is_singular_file(file)) 888 goto fh_rel; 889 890 ret = v4l2_subdev_call(sd, core, s_power, 1); 891 if (ret < 0 && ret != -ENOIOCTLCMD) 892 goto fh_rel; 893 894 ret = isi_set_fmt(isi, &isi->fmt); 895 if (ret) 896 v4l2_subdev_call(sd, core, s_power, 0); 897fh_rel: 898 if (ret) 899 v4l2_fh_release(file); 900unlock: 901 mutex_unlock(&isi->lock); 902 return ret; 903} 904 905static int isi_release(struct file *file) 906{ 907 struct atmel_isi *isi = video_drvdata(file); 908 struct v4l2_subdev *sd = isi->entity.subdev; 909 bool fh_singular; 910 int ret; 911 912 mutex_lock(&isi->lock); 913 914 fh_singular = v4l2_fh_is_singular_file(file); 915 916 ret = _vb2_fop_release(file, NULL); 917 918 if (fh_singular) 919 v4l2_subdev_call(sd, core, s_power, 0); 920 921 mutex_unlock(&isi->lock); 922 923 return ret; 924} 925 926static const struct v4l2_ioctl_ops isi_ioctl_ops = { 927 .vidioc_querycap = isi_querycap, 928 929 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, 930 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, 931 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, 932 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, 933 934 .vidioc_enum_input = isi_enum_input, 935 .vidioc_g_input = isi_g_input, 936 .vidioc_s_input = isi_s_input, 937 938 .vidioc_g_parm = isi_g_parm, 939 .vidioc_s_parm = isi_s_parm, 940 .vidioc_enum_framesizes = isi_enum_framesizes, 941 .vidioc_enum_frameintervals = isi_enum_frameintervals, 942 943 .vidioc_reqbufs = vb2_ioctl_reqbufs, 944 .vidioc_create_bufs = vb2_ioctl_create_bufs, 945 .vidioc_querybuf = vb2_ioctl_querybuf, 946 .vidioc_qbuf = vb2_ioctl_qbuf, 947 .vidioc_dqbuf = vb2_ioctl_dqbuf, 948 .vidioc_expbuf = vb2_ioctl_expbuf, 949 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 950 .vidioc_streamon = vb2_ioctl_streamon, 951 .vidioc_streamoff = vb2_ioctl_streamoff, 952 953 .vidioc_log_status = v4l2_ctrl_log_status, 954 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 955 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 956}; 957 958static const struct v4l2_file_operations isi_fops = { 959 .owner = THIS_MODULE, 960 .unlocked_ioctl = video_ioctl2, 961 .open = isi_open, 962 .release = isi_release, 963 .poll = vb2_fop_poll, 964 .mmap = vb2_fop_mmap, 965 .read = vb2_fop_read, 966}; 967 968static int isi_set_default_fmt(struct atmel_isi *isi) 969{ 970 struct v4l2_format f = { 971 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 972 .fmt.pix = { 973 .width = VGA_WIDTH, 974 .height = VGA_HEIGHT, 975 .field = V4L2_FIELD_NONE, 976 .pixelformat = isi->user_formats[0]->fourcc, 977 }, 978 }; 979 int ret; 980 981 ret = isi_try_fmt(isi, &f, NULL); 982 if (ret) 983 return ret; 984 isi->current_fmt = isi->user_formats[0]; 985 isi->fmt = f; 986 return 0; 987} 988 989static const struct isi_format isi_formats[] = { 990 { 991 .fourcc = V4L2_PIX_FMT_YUYV, 992 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 993 .bpp = 2, 994 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 995 }, { 996 .fourcc = V4L2_PIX_FMT_YUYV, 997 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 998 .bpp = 2, 999 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1000 }, { 1001 .fourcc = V4L2_PIX_FMT_YUYV, 1002 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1003 .bpp = 2, 1004 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1005 }, { 1006 .fourcc = V4L2_PIX_FMT_YUYV, 1007 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1008 .bpp = 2, 1009 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1010 }, { 1011 .fourcc = V4L2_PIX_FMT_RGB565, 1012 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, 1013 .bpp = 2, 1014 .swap = ISI_CFG2_YCC_SWAP_MODE_2, 1015 }, { 1016 .fourcc = V4L2_PIX_FMT_RGB565, 1017 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, 1018 .bpp = 2, 1019 .swap = ISI_CFG2_YCC_SWAP_MODE_3, 1020 }, { 1021 .fourcc = V4L2_PIX_FMT_RGB565, 1022 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, 1023 .bpp = 2, 1024 .swap = ISI_CFG2_YCC_SWAP_DEFAULT, 1025 }, { 1026 .fourcc = V4L2_PIX_FMT_RGB565, 1027 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, 1028 .bpp = 2, 1029 .swap = ISI_CFG2_YCC_SWAP_MODE_1, 1030 }, { 1031 .fourcc = V4L2_PIX_FMT_GREY, 1032 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1033 .bpp = 1, 1034 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1035 }, { 1036 .fourcc = V4L2_PIX_FMT_Y16, 1037 .mbus_code = MEDIA_BUS_FMT_Y10_1X10, 1038 .bpp = 2, 1039 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, 1040 }, 1041}; 1042 1043static int isi_formats_init(struct atmel_isi *isi) 1044{ 1045 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; 1046 unsigned int num_fmts = 0, i, j; 1047 struct v4l2_subdev *subdev = isi->entity.subdev; 1048 struct v4l2_subdev_mbus_code_enum mbus_code = { 1049 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 1050 }; 1051 1052 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, 1053 NULL, &mbus_code)) { 1054 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { 1055 if (isi_formats[i].mbus_code != mbus_code.code) 1056 continue; 1057 1058 /* Code supported, have we got this fourcc yet? */ 1059 for (j = 0; j < num_fmts; j++) 1060 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) 1061 /* Already available */ 1062 break; 1063 if (j == num_fmts) 1064 /* new */ 1065 isi_fmts[num_fmts++] = isi_formats + i; 1066 } 1067 mbus_code.index++; 1068 } 1069 1070 if (!num_fmts) 1071 return -ENXIO; 1072 1073 isi->num_user_formats = num_fmts; 1074 isi->user_formats = devm_kcalloc(isi->dev, 1075 num_fmts, sizeof(struct isi_format *), 1076 GFP_KERNEL); 1077 if (!isi->user_formats) 1078 return -ENOMEM; 1079 1080 memcpy(isi->user_formats, isi_fmts, 1081 num_fmts * sizeof(struct isi_format *)); 1082 isi->current_fmt = isi->user_formats[0]; 1083 1084 return 0; 1085} 1086 1087static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) 1088{ 1089 struct atmel_isi *isi = notifier_to_isi(notifier); 1090 int ret; 1091 1092 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; 1093 ret = isi_formats_init(isi); 1094 if (ret) { 1095 dev_err(isi->dev, "No supported mediabus format found\n"); 1096 return ret; 1097 } 1098 ret = isi_camera_set_bus_param(isi); 1099 if (ret) { 1100 dev_err(isi->dev, "Can't wake up device\n"); 1101 return ret; 1102 } 1103 1104 ret = isi_set_default_fmt(isi); 1105 if (ret) { 1106 dev_err(isi->dev, "Could not set default format\n"); 1107 return ret; 1108 } 1109 1110 ret = video_register_device(isi->vdev, VFL_TYPE_VIDEO, -1); 1111 if (ret) { 1112 dev_err(isi->dev, "Failed to register video device\n"); 1113 return ret; 1114 } 1115 1116 dev_dbg(isi->dev, "Device registered as %s\n", 1117 video_device_node_name(isi->vdev)); 1118 return 0; 1119} 1120 1121static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, 1122 struct v4l2_subdev *sd, 1123 struct v4l2_async_connection *asd) 1124{ 1125 struct atmel_isi *isi = notifier_to_isi(notifier); 1126 1127 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev)); 1128 1129 /* Checks internally if vdev have been init or not */ 1130 video_unregister_device(isi->vdev); 1131} 1132 1133static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, 1134 struct v4l2_subdev *subdev, 1135 struct v4l2_async_connection *asd) 1136{ 1137 struct atmel_isi *isi = notifier_to_isi(notifier); 1138 1139 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name); 1140 1141 isi->entity.subdev = subdev; 1142 1143 return 0; 1144} 1145 1146static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { 1147 .bound = isi_graph_notify_bound, 1148 .unbind = isi_graph_notify_unbind, 1149 .complete = isi_graph_notify_complete, 1150}; 1151 1152static int isi_graph_init(struct atmel_isi *isi) 1153{ 1154 struct v4l2_async_connection *asd; 1155 struct device_node *ep; 1156 int ret; 1157 1158 ep = of_graph_get_next_endpoint(isi->dev->of_node, NULL); 1159 if (!ep) 1160 return -EINVAL; 1161 1162 v4l2_async_nf_init(&isi->notifier, &isi->v4l2_dev); 1163 1164 asd = v4l2_async_nf_add_fwnode_remote(&isi->notifier, 1165 of_fwnode_handle(ep), 1166 struct v4l2_async_connection); 1167 of_node_put(ep); 1168 1169 if (IS_ERR(asd)) 1170 return PTR_ERR(asd); 1171 1172 isi->notifier.ops = &isi_graph_notify_ops; 1173 1174 ret = v4l2_async_nf_register(&isi->notifier); 1175 if (ret < 0) { 1176 dev_err(isi->dev, "Notifier registration failed\n"); 1177 v4l2_async_nf_cleanup(&isi->notifier); 1178 return ret; 1179 } 1180 1181 return 0; 1182} 1183 1184 1185static int atmel_isi_probe(struct platform_device *pdev) 1186{ 1187 int irq; 1188 struct atmel_isi *isi; 1189 struct vb2_queue *q; 1190 int ret, i; 1191 1192 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL); 1193 if (!isi) 1194 return -ENOMEM; 1195 1196 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk"); 1197 if (IS_ERR(isi->pclk)) 1198 return PTR_ERR(isi->pclk); 1199 1200 ret = atmel_isi_parse_dt(isi, pdev); 1201 if (ret) 1202 return ret; 1203 1204 isi->active = NULL; 1205 isi->dev = &pdev->dev; 1206 mutex_init(&isi->lock); 1207 spin_lock_init(&isi->irqlock); 1208 INIT_LIST_HEAD(&isi->video_buffer_list); 1209 INIT_LIST_HEAD(&isi->dma_desc_head); 1210 1211 q = &isi->queue; 1212 1213 /* Initialize the top-level structure */ 1214 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev); 1215 if (ret) 1216 return ret; 1217 1218 isi->vdev = video_device_alloc(); 1219 if (!isi->vdev) { 1220 ret = -ENOMEM; 1221 goto err_vdev_alloc; 1222 } 1223 1224 /* video node */ 1225 isi->vdev->fops = &isi_fops; 1226 isi->vdev->v4l2_dev = &isi->v4l2_dev; 1227 isi->vdev->queue = &isi->queue; 1228 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); 1229 isi->vdev->release = video_device_release; 1230 isi->vdev->ioctl_ops = &isi_ioctl_ops; 1231 isi->vdev->lock = &isi->lock; 1232 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | 1233 V4L2_CAP_READWRITE; 1234 video_set_drvdata(isi->vdev, isi); 1235 1236 /* buffer queue */ 1237 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1238 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; 1239 q->lock = &isi->lock; 1240 q->drv_priv = isi; 1241 q->buf_struct_size = sizeof(struct frame_buffer); 1242 q->ops = &isi_video_qops; 1243 q->mem_ops = &vb2_dma_contig_memops; 1244 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1245 q->min_buffers_needed = 2; 1246 q->dev = &pdev->dev; 1247 1248 ret = vb2_queue_init(q); 1249 if (ret < 0) { 1250 dev_err(&pdev->dev, "failed to initialize VB2 queue\n"); 1251 goto err_vb2_queue; 1252 } 1253 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev, 1254 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1255 &isi->fb_descriptors_phys, 1256 GFP_KERNEL); 1257 if (!isi->p_fb_descriptors) { 1258 dev_err(&pdev->dev, "Can't allocate descriptors!\n"); 1259 ret = -ENOMEM; 1260 goto err_dma_alloc; 1261 } 1262 1263 for (i = 0; i < VIDEO_MAX_FRAME; i++) { 1264 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; 1265 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + 1266 i * sizeof(struct fbd); 1267 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head); 1268 } 1269 1270 isi->regs = devm_platform_ioremap_resource(pdev, 0); 1271 if (IS_ERR(isi->regs)) { 1272 ret = PTR_ERR(isi->regs); 1273 goto err_ioremap; 1274 } 1275 1276 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) 1277 isi->width_flags = 1 << 7; 1278 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) 1279 isi->width_flags |= 1 << 9; 1280 1281 irq = platform_get_irq(pdev, 0); 1282 if (irq < 0) { 1283 ret = irq; 1284 goto err_req_irq; 1285 } 1286 1287 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi); 1288 if (ret) { 1289 dev_err(&pdev->dev, "Unable to request irq %d\n", irq); 1290 goto err_req_irq; 1291 } 1292 isi->irq = irq; 1293 1294 ret = isi_graph_init(isi); 1295 if (ret < 0) 1296 goto err_req_irq; 1297 1298 pm_suspend_ignore_children(&pdev->dev, true); 1299 pm_runtime_enable(&pdev->dev); 1300 platform_set_drvdata(pdev, isi); 1301 return 0; 1302 1303err_req_irq: 1304err_ioremap: 1305 dma_free_coherent(&pdev->dev, 1306 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1307 isi->p_fb_descriptors, 1308 isi->fb_descriptors_phys); 1309err_dma_alloc: 1310err_vb2_queue: 1311 video_device_release(isi->vdev); 1312err_vdev_alloc: 1313 v4l2_device_unregister(&isi->v4l2_dev); 1314 1315 return ret; 1316} 1317 1318static void atmel_isi_remove(struct platform_device *pdev) 1319{ 1320 struct atmel_isi *isi = platform_get_drvdata(pdev); 1321 1322 dma_free_coherent(&pdev->dev, 1323 sizeof(struct fbd) * VIDEO_MAX_FRAME, 1324 isi->p_fb_descriptors, 1325 isi->fb_descriptors_phys); 1326 pm_runtime_disable(&pdev->dev); 1327 v4l2_async_nf_unregister(&isi->notifier); 1328 v4l2_async_nf_cleanup(&isi->notifier); 1329 v4l2_device_unregister(&isi->v4l2_dev); 1330} 1331 1332#ifdef CONFIG_PM 1333static int atmel_isi_runtime_suspend(struct device *dev) 1334{ 1335 struct atmel_isi *isi = dev_get_drvdata(dev); 1336 1337 clk_disable_unprepare(isi->pclk); 1338 1339 return 0; 1340} 1341static int atmel_isi_runtime_resume(struct device *dev) 1342{ 1343 struct atmel_isi *isi = dev_get_drvdata(dev); 1344 1345 return clk_prepare_enable(isi->pclk); 1346} 1347#endif /* CONFIG_PM */ 1348 1349static const struct dev_pm_ops atmel_isi_dev_pm_ops = { 1350 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, 1351 atmel_isi_runtime_resume, NULL) 1352}; 1353 1354static const struct of_device_id atmel_isi_of_match[] = { 1355 { .compatible = "atmel,at91sam9g45-isi" }, 1356 { } 1357}; 1358MODULE_DEVICE_TABLE(of, atmel_isi_of_match); 1359 1360static struct platform_driver atmel_isi_driver = { 1361 .driver = { 1362 .name = "atmel_isi", 1363 .of_match_table = of_match_ptr(atmel_isi_of_match), 1364 .pm = &atmel_isi_dev_pm_ops, 1365 }, 1366 .probe = atmel_isi_probe, 1367 .remove_new = atmel_isi_remove, 1368}; 1369 1370module_platform_driver(atmel_isi_driver); 1371 1372MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>"); 1373MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); 1374MODULE_LICENSE("GPL"); 1375