├── LICENSE ├── README └── kmod ├── Makefile ├── axi-csi-rx.c ├── example.dts └── ov5647.c /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README: -------------------------------------------------------------------------------- 1 | MIPI CSI2 RX core with AXI interface for Xilinx FPGAs 2 | -------------------------------------------------------------------------------- /kmod/Makefile: -------------------------------------------------------------------------------- 1 | obj-m += axi-csi-rx.o ov5647.o 2 | 3 | KSRC ?= "/lib/modules/$(shell uname -r)/build" 4 | 5 | all: 6 | make -C ${KSRC} M=$(PWD) modules 7 | 8 | clean: 9 | make -C ${KSRC} M=$(PWD) clean 10 | -------------------------------------------------------------------------------- /kmod/axi-csi-rx.c: -------------------------------------------------------------------------------- 1 | /* 2 | * axi-csi-rx.c 3 | * 4 | * Based on axi-hdmi-rx.c 5 | * 6 | * Copyright (C) 2015 Sylvain Munaut 7 | * Copyright (C) 2012-2013 Analog Devices Inc. 8 | * 9 | * This program is free software; you can redistribute it and/or modify 10 | * it under the terms of the GNU General Public License version 2 as 11 | * published by the Free Software Foundation. 12 | */ 13 | 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | 21 | #include 22 | #include 23 | #include 24 | #include 25 | #include 26 | #include 27 | #include 28 | 29 | 30 | #define DRIVER_NAME "axi-csi-rx" 31 | 32 | 33 | #define AXI_CSI_RX_REG_CR 0x00 34 | #define AXI_CSI_RX_REG_SR 0x04 35 | #define AXI_CSI_RX_REG_ER 0x08 36 | #define AXI_CSI_RX_REG_IMR 0x0C 37 | #define AXI_CSI_RX_REG_PDCR 0x10 38 | #define AXI_CSI_RX_REG_VPCR 0x14 39 | #define AXI_CSI_RX_REG_VCCS 0x20 40 | #define AXI_CSI_RX_REG_VCCE 0x24 41 | #define AXI_CSI_RX_REG_VCLS 0x28 42 | #define AXI_CSI_RX_REG_VCLE 0x2C 43 | 44 | 45 | struct axi_csi_rx_buffer { 46 | struct vb2_buffer vb; 47 | struct list_head head; 48 | }; 49 | 50 | struct axi_csi_rx_stream { 51 | struct video_device vdev; 52 | struct vb2_queue q; 53 | struct v4l2_subdev *subdev; 54 | 55 | struct mutex lock; 56 | 57 | struct dma_chan *chan; 58 | }; 59 | 60 | struct axi_csi_rx { 61 | struct v4l2_device v4l2_dev; 62 | struct vb2_alloc_ctx *alloc_ctx; 63 | 64 | struct axi_csi_rx_stream stream; 65 | 66 | void __iomem *base; 67 | struct gpio_desc *gpio_led; 68 | 69 | struct v4l2_async_notifier notifier; 70 | struct v4l2_async_subdev asd; 71 | struct v4l2_async_subdev *asds[1]; 72 | }; 73 | 74 | #if 0 75 | struct axi_csi_rx_fmt_desc { 76 | 77 | const char *desc; 78 | u32 79 | }; 80 | 81 | static const struct axi_csi_rx_fmt_desc axi_csi_rx_fmts[] = { 82 | { "sbggr10p", 0x000000 }, /* x xx xxxxxxxx 00 00 */ 83 | { "sbggr10", 0xa00022 }, /* 1 10 xxxxxxxx 10 10 */ 84 | { "sbggr8", 0x800023 }, /* 1 00 xxxxxxxx 10 11 */ 85 | { "rgbz32", 0x803930 }, /* 1 xx 00111001 11 00 */ 86 | { "bgrz32", 0x801b30 }, /* 1 xx 00011011 11 00 */ 87 | { "gray8", 0x800233 }, /* 1 xx xxxxxx10 11 11 */ 88 | }; 89 | #endif 90 | 91 | 92 | 93 | /* Helpers ---------------------------------------------------------------- */ 94 | 95 | static void 96 | axi_csi_rx_write(struct axi_csi_rx *csi, 97 | unsigned int reg, unsigned int val) 98 | { 99 | writel(val, csi->base + reg); 100 | } 101 | 102 | static u32 103 | axi_csi_rx_read(struct axi_csi_rx *csi, 104 | unsigned int reg) 105 | { 106 | return readl(csi->base + reg); 107 | } 108 | 109 | 110 | 111 | /* V4L device ------------------------------------------------------------- */ 112 | 113 | 114 | /* File Operations */ 115 | 116 | static const struct v4l2_file_operations axi_csi_rx_fops = { 117 | .owner = THIS_MODULE, 118 | .open = v4l2_fh_open, 119 | .release = vb2_fop_release, 120 | .unlocked_ioctl = video_ioctl2, 121 | .read = vb2_fop_read, 122 | .poll = vb2_fop_poll, 123 | .mmap = vb2_fop_mmap, 124 | }; 125 | 126 | 127 | /* IOCTL Operations */ 128 | 129 | static int 130 | axi_csi_rx_ioctl_querycap(struct file *file, void *priv_fh, 131 | struct v4l2_capability *vcap) 132 | { 133 | strlcpy(vcap->driver, DRIVER_NAME, sizeof(vcap->driver)); 134 | strlcpy(vcap->card, DRIVER_NAME, sizeof(vcap->card)); 135 | snprintf(vcap->bus_info, sizeof(vcap->bus_info), "platform:" DRIVER_NAME); 136 | vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 137 | vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS; 138 | 139 | return 0; 140 | } 141 | 142 | static int 143 | axi_csi_rx_ioctl_enum_fmt_vid_cap(struct file *file, void *priv_fh, 144 | struct v4l2_fmtdesc *f) 145 | { 146 | return 0; /* FIXME */ 147 | } 148 | 149 | static int 150 | axi_csi_rx_ioctl_get_fmt_vid_cap(struct file *file, void *priv_fh, 151 | struct v4l2_format *f) 152 | { 153 | struct axi_csi_rx *hdmi_rx = video_drvdata(file); 154 | struct axi_csi_rx_stream *s = &hdmi_rx->stream; 155 | struct v4l2_pix_format *pix = &f->fmt.pix; 156 | 157 | /* FIXME */ 158 | return 0; 159 | } 160 | 161 | static int 162 | axi_csi_rx_ioctl_set_fmt_vid_cap(struct file *file, void *priv_fh, 163 | struct v4l2_format *f) 164 | { 165 | return 0; /* FIXME */ 166 | } 167 | 168 | static int 169 | axi_csi_rx_ioctl_try_fmt_vid_cap(struct file *file, void *priv_fh, 170 | struct v4l2_format *f) 171 | { 172 | return 0; /* FIXME */ 173 | } 174 | 175 | static int 176 | axi_csi_rx_ioctl_log_status(struct file *file, void *priv_fh) 177 | { 178 | struct axi_csi_rx *csi = video_drvdata(file); 179 | 180 | v4l2_device_call_all(&csi->v4l2_dev, 0, core, log_status); 181 | 182 | return 0; 183 | } 184 | 185 | 186 | #ifdef CONFIG_VIDEO_ADV_DEBUG 187 | static int 188 | axi_csi_rx_ioctl_get_register(struct file *file, void *priv_fh, 189 | struct v4l2_dbg_register *reg) 190 | { 191 | struct axi_csi_rx *csi = video_drvdata(file); 192 | 193 | reg->val = axi_csi_rx_read(csi, reg->reg); 194 | reg->size = 4; 195 | 196 | return 0; 197 | } 198 | 199 | static int 200 | axi_csi_rx_ioctl_set_register(struct file *file, void *priv_fh, 201 | const struct v4l2_dbg_register *reg) 202 | { 203 | struct axi_csi_rx *csi = video_drvdata(file); 204 | 205 | axi_csi_rx_write(csi, reg->reg, reg->val); 206 | 207 | return 0; 208 | } 209 | #endif 210 | 211 | static const struct v4l2_ioctl_ops axi_csi_rx_ioctl_ops = { 212 | .vidioc_querycap = axi_csi_rx_ioctl_querycap, 213 | .vidioc_enum_fmt_vid_cap = axi_csi_rx_ioctl_enum_fmt_vid_cap, 214 | .vidioc_g_fmt_vid_cap = axi_csi_rx_ioctl_get_fmt_vid_cap, 215 | .vidioc_s_fmt_vid_cap = axi_csi_rx_ioctl_set_fmt_vid_cap, 216 | .vidioc_try_fmt_vid_cap = axi_csi_rx_ioctl_try_fmt_vid_cap, 217 | .vidioc_log_status = axi_csi_rx_ioctl_log_status, 218 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 219 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 220 | .vidioc_reqbufs = vb2_ioctl_reqbufs, 221 | .vidioc_querybuf = vb2_ioctl_querybuf, 222 | .vidioc_qbuf = vb2_ioctl_qbuf, 223 | .vidioc_dqbuf = vb2_ioctl_dqbuf, 224 | .vidioc_create_bufs = vb2_ioctl_create_bufs, 225 | .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 226 | .vidioc_streamon = vb2_ioctl_streamon, 227 | .vidioc_streamoff = vb2_ioctl_streamoff, 228 | #ifdef CONFIG_VIDEO_ADV_DEBUG 229 | .vidioc_g_register = axi_csi_rx_ioctl_get_register, 230 | .vidioc_s_register = axi_csi_rx_ioctl_set_register, 231 | #endif 232 | }; 233 | 234 | 235 | /* Queue Operations */ 236 | 237 | static int 238 | axi_csi_rx_qops_queue_setup(struct vb2_queue *q, 239 | const struct v4l2_format *fmt, unsigned int *num_buffers, 240 | unsigned int *num_planes, unsigned int sizes[], void *alloc_ctxs[]) 241 | { 242 | struct axi_csi_rx *csi = vb2_get_drv_priv(q); 243 | struct axi_csi_rx_stream *s = &csi->stream; 244 | 245 | v4l2_info(&csi->v4l2_dev, "%s\n", __func__); 246 | 247 | return 0; 248 | } 249 | 250 | static int 251 | axi_csi_rx_qops_buf_prepare(struct vb2_buffer *vb) 252 | { 253 | struct axi_csi_rx *csi = vb2_get_drv_priv(vb->vb2_queue); 254 | struct axi_csi_rx_stream *s = &csi->stream; 255 | 256 | v4l2_info(&csi->v4l2_dev, "%s\n", __func__); 257 | 258 | return 0; /* FIXME */ 259 | } 260 | 261 | static void 262 | axi_csi_rx_qops_buf_queue(struct vb2_buffer *vb) 263 | { 264 | struct axi_csi_rx *csi = vb2_get_drv_priv(vb->vb2_queue); 265 | struct axi_csi_rx_stream *s = &csi->stream; 266 | 267 | v4l2_info(&csi->v4l2_dev, "%s\n", __func__); 268 | /* FIXME */ 269 | } 270 | 271 | static int 272 | axi_csi_rx_qops_start_streaming(struct vb2_queue *q, unsigned int count) 273 | { 274 | struct axi_csi_rx *csi = vb2_get_drv_priv(q); 275 | struct axi_csi_rx_stream *s = &csi->stream; 276 | 277 | v4l2_info(&csi->v4l2_dev, "%s\n", __func__); 278 | return 0; /* FIXME */ 279 | } 280 | 281 | static int 282 | axi_csi_rx_qops_stop_streaming(struct vb2_queue *q) 283 | { 284 | struct axi_csi_rx *csi = vb2_get_drv_priv(q); 285 | struct axi_csi_rx_stream *s = &csi->stream; 286 | 287 | v4l2_info(&csi->v4l2_dev, "%s\n", __func__); 288 | return 0; /* FIXME */ 289 | } 290 | 291 | static const struct vb2_ops axi_csi_rx_qops = { 292 | .queue_setup = axi_csi_rx_qops_queue_setup, 293 | .wait_prepare = vb2_ops_wait_prepare, 294 | .wait_finish = vb2_ops_wait_finish, 295 | .buf_prepare = axi_csi_rx_qops_buf_prepare, 296 | .buf_queue = axi_csi_rx_qops_buf_queue, 297 | .start_streaming = axi_csi_rx_qops_start_streaming, 298 | .stop_streaming = axi_csi_rx_qops_stop_streaming, 299 | }; 300 | 301 | 302 | /* */ 303 | 304 | static int 305 | axi_csi_rx_nodes_register(struct axi_csi_rx *csi) 306 | { 307 | struct axi_csi_rx_stream *s = &csi->stream; 308 | struct video_device *vdev = &s->vdev; 309 | struct vb2_queue *q = &s->q; 310 | int rv; 311 | 312 | mutex_init(&s->lock); 313 | 314 | vdev->v4l2_dev = &csi->v4l2_dev; 315 | vdev->fops = &axi_csi_rx_fops; 316 | vdev->release = video_device_release_empty; 317 | vdev->ctrl_handler = s->subdev->ctrl_handler; 318 | set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags); 319 | vdev->lock = &s->lock; 320 | vdev->queue = q; 321 | 322 | q->lock = &s->lock; 323 | 324 | vdev->ioctl_ops = &axi_csi_rx_ioctl_ops; 325 | 326 | q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 327 | q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 328 | q->drv_priv = csi; 329 | q->buf_struct_size = sizeof(struct axi_csi_rx_buffer); 330 | q->ops = &axi_csi_rx_qops; 331 | q->mem_ops = &vb2_dma_contig_memops; 332 | q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 333 | 334 | rv = vb2_queue_init(q); 335 | if (rv) 336 | return rv; 337 | 338 | return video_register_device(vdev, VFL_TYPE_GRABBER, -1); 339 | } 340 | 341 | /* Async subdev probing */ 342 | static struct axi_csi_rx * 343 | notifier_to_axi_csi_rx(struct v4l2_async_notifier *n) 344 | { 345 | return container_of(n, struct axi_csi_rx, notifier); 346 | } 347 | 348 | static int 349 | axi_csi_rx_async_bound(struct v4l2_async_notifier *notifier, 350 | struct v4l2_subdev *subdev, 351 | struct v4l2_async_subdev *asd) 352 | { 353 | struct axi_csi_rx *csi = notifier_to_axi_csi_rx(notifier); 354 | 355 | v4l2_info(&csi->v4l2_dev, "async bound\n"); 356 | 357 | csi->stream.subdev = subdev; 358 | 359 | return 0; 360 | } 361 | 362 | static int 363 | axi_csi_rx_async_complete(struct v4l2_async_notifier *notifier) 364 | { 365 | struct axi_csi_rx *csi = notifier_to_axi_csi_rx(notifier); 366 | int rv; 367 | 368 | v4l2_info(&csi->v4l2_dev, "async complete\n"); 369 | 370 | rv = v4l2_device_register_subdev_nodes(&csi->v4l2_dev); 371 | if (rv < 0) 372 | return rv; 373 | 374 | return axi_csi_rx_nodes_register(csi); 375 | } 376 | 377 | 378 | 379 | 380 | /* Platform Driver ------------------------------------------------------- */ 381 | 382 | static int 383 | axi_csi_rx_probe(struct platform_device *pdev) 384 | { 385 | struct axi_csi_rx *csi; 386 | struct resource *regs; 387 | struct device_node *ep_node; 388 | int irq, rv; 389 | 390 | dev_info(&pdev->dev, "probe\n"); 391 | 392 | /* Alloc our private struct */ 393 | csi = devm_kzalloc(&pdev->dev, sizeof(struct axi_csi_rx), GFP_KERNEL); 394 | if (!csi) 395 | return -ENOMEM; 396 | 397 | /* Get info & resources from the DT */ 398 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 399 | if (!regs) { 400 | dev_err(&pdev->dev, "Invalid (or missing) base address\n"); 401 | return -ENXIO; 402 | } 403 | csi->base = devm_ioremap_resource(&pdev->dev, regs); 404 | if (IS_ERR(csi->base)) 405 | return PTR_ERR(csi->base); 406 | 407 | irq = platform_get_irq(pdev, 0); 408 | if (!irq) { 409 | dev_err(&pdev->dev, "Invalid (or missing) IRQ\n"); 410 | return -ENXIO; 411 | } 412 | 413 | csi->gpio_led = devm_gpiod_get(&pdev->dev, "led"); 414 | if (!IS_ERR(csi->gpio_led)) { 415 | gpiod_direction_output(csi->gpio_led, 0); 416 | } else { 417 | csi->gpio_led = NULL; 418 | } 419 | 420 | csi->stream.chan = dma_request_slave_channel(&pdev->dev, "video"); 421 | if (!csi->stream.chan) 422 | return -EPROBE_DEFER; 423 | 424 | /* V4L2 setup */ 425 | csi->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); 426 | if (IS_ERR(csi->alloc_ctx)) { 427 | rv = PTR_ERR(csi->alloc_ctx); 428 | dev_err(&pdev->dev, "Failed to init dma ctx: %d\n", rv); 429 | goto err_dma_release_channel; 430 | } 431 | 432 | rv = v4l2_device_register(&pdev->dev, &csi->v4l2_dev); 433 | if (rv) { 434 | dev_err(&pdev->dev, "Failed to register V4L device: %d\n", rv); 435 | goto err_dma_cleanup_ctx; 436 | } 437 | 438 | ep_node = v4l2_of_get_next_endpoint(pdev->dev.of_node, NULL); 439 | if (!ep_node) { 440 | rv = -EINVAL; 441 | goto err_device_unregister; 442 | } 443 | 444 | csi->asd.match_type = V4L2_ASYNC_MATCH_OF; 445 | csi->asd.match.of.node = v4l2_of_get_remote_port_parent(ep_node); 446 | 447 | csi->asds[0] = &csi->asd; 448 | csi->notifier.subdevs = csi->asds; 449 | csi->notifier.num_subdevs = ARRAY_SIZE(csi->asds); 450 | csi->notifier.bound = axi_csi_rx_async_bound; 451 | csi->notifier.complete = axi_csi_rx_async_complete; 452 | 453 | rv = v4l2_async_notifier_register(&csi->v4l2_dev, &csi->notifier); 454 | if (rv) { 455 | dev_err(&pdev->dev, "Error %d registering device nodes\n", rv); 456 | goto err_device_unregister; 457 | } 458 | 459 | /* Init result */ 460 | dev_info(&pdev->dev, "Regs : 0x%08x -> 0x%08x [%s]\n", 461 | regs->start, regs->end, regs->name); 462 | dev_info(&pdev->dev, "IRQ : %d\n", irq); 463 | dev_info(&pdev->dev, "GPIO LED : %d\n", 464 | csi->gpio_led ? desc_to_gpio(csi->gpio_led) : -1); 465 | 466 | return 0; 467 | 468 | err_device_unregister: 469 | v4l2_device_unregister(&csi->v4l2_dev); 470 | err_dma_cleanup_ctx: 471 | vb2_dma_contig_cleanup_ctx(csi->alloc_ctx); 472 | err_dma_release_channel: 473 | dma_release_channel(csi->stream.chan); 474 | 475 | return rv; 476 | } 477 | 478 | static int 479 | axi_csi_rx_remove(struct platform_device *pdev) 480 | { 481 | struct axi_csi_rx *csi = platform_get_drvdata(pdev); 482 | 483 | dev_info(&pdev->dev, "remove\n"); 484 | 485 | v4l2_async_notifier_unregister(&csi->notifier); 486 | video_unregister_device(&csi->stream.vdev); 487 | v4l2_device_unregister(&csi->v4l2_dev); 488 | vb2_dma_contig_cleanup_ctx(csi->alloc_ctx); 489 | dma_release_channel(csi->stream.chan); 490 | 491 | return 0; 492 | } 493 | 494 | 495 | static struct of_device_id axi_csi_rx_of_match[] = { 496 | { .compatible = "s47,axi-csi-rx-1.00.a", }, 497 | { } 498 | }; 499 | MODULE_DEVICE_TABLE(of, axi_csi_rx_of_match); 500 | 501 | static struct platform_driver axi_csi_rx_driver = { 502 | .probe = axi_csi_rx_probe, 503 | .remove = axi_csi_rx_remove, 504 | .driver = { 505 | .owner = THIS_MODULE, 506 | .name = DRIVER_NAME, 507 | .of_match_table = axi_csi_rx_of_match, 508 | }, 509 | }; 510 | module_platform_driver(axi_csi_rx_driver); 511 | 512 | MODULE_AUTHOR("Sylvain Munaut "); 513 | MODULE_DESCRIPTION("MIPI CSI RX interface on AXI bus"); 514 | MODULE_LICENSE("GPL"); 515 | -------------------------------------------------------------------------------- /kmod/example.dts: -------------------------------------------------------------------------------- 1 | /dts-v1/; 2 | 3 | /include/ "zynq-parallella1.dtsi" 4 | 5 | / { 6 | amba@0 { 7 | 8 | i2c@e0005000 { 9 | compatible = "cdns,i2c-r1p10"; 10 | reg = <0xe0005000 0x1000>; 11 | interrupts = <0 48 4>; 12 | interrupt-parent = <&gic>; 13 | bus-id = <0x0>; 14 | clocks = <&clkc 39>; 15 | clock-frequency = <400000>; 16 | #address-cells = <0x1>; 17 | #size-cells = <0x0>; 18 | 19 | ov5647: ov5647@36 { 20 | compatible = "omnivision,ov5647"; 21 | reg = <0x36>; 22 | 23 | clock-frequency = <25000000>; 24 | 25 | enable-gpios = <&gpio 74 0>; 26 | 27 | port { 28 | ov5647_ep: endpoint { 29 | remote-endpoint = <&csi_ep>; 30 | clock-lanes = <0>; 31 | data-lanes = <1 2>; 32 | }; 33 | }; 34 | }; 35 | }; 36 | 37 | csi_vdma: vdma@43000000 { 38 | compatible = "xlnx,axi-vdma"; 39 | reg = <0x43000000 0x10000>; 40 | 41 | xlnx,include-sg = <0x0>; 42 | xlnx,num-fstores = <4>; 43 | 44 | #address-cells = <1>; 45 | #size-cells = <1>; 46 | #dma-cells = <1>; 47 | 48 | dma-channel@43000030 { 49 | compatible = "xlnx,axi-vdma-s2mm-channel"; 50 | interrupts = <0 29 4>; 51 | xlnx,datawidth = <64>; 52 | xlnx,genlock-mode = <0x0>; 53 | xlnx,include-dre = <0x0>; 54 | }; 55 | }; 56 | 57 | csi@43c00000 { 58 | compatible = "s47,axi-csi-rx-1.00.a"; 59 | reg = <0x43c00000 0x10000>; 60 | 61 | interrupts = <0 30 4>; 62 | interrupt-parent = <&gic>; 63 | 64 | dmas = <&csi_vdma 0>; 65 | dma-names = "video"; 66 | 67 | led-gpios = <&gpio 76 0>; 68 | 69 | port { 70 | csi_ep: endpoint { 71 | remote-endpoint = <&ov5647_ep>; 72 | clock-lanes = <0>; 73 | data-lanes = <1 2>; 74 | }; 75 | }; 76 | }; 77 | 78 | }; 79 | 80 | }; 81 | -------------------------------------------------------------------------------- /kmod/ov5647.c: -------------------------------------------------------------------------------- 1 | /* 2 | * ov5647.c 3 | * 4 | * Copyright (C) 2015 Sylvain Munaut 5 | * 6 | * This program is free software; you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License version 2 as 8 | * published by the Free Software Foundation. 9 | */ 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | 18 | #include 19 | #include 20 | #include 21 | 22 | 23 | #define DRIVER_NAME "ov5647" 24 | 25 | static int debug; 26 | module_param(debug, int, 0644); 27 | MODULE_PARM_DESC(debug, "Debug level (0-2)"); 28 | 29 | 30 | struct ov5647 { 31 | struct v4l2_subdev sd; /* Must be first ! */ 32 | struct media_pad pad; 33 | struct i2c_client *client; 34 | struct gpio_desc *gpio_ena; 35 | u32 xclk_freq; 36 | }; 37 | 38 | /* Data ------------------------------------------------------------------- */ 39 | 40 | const static struct { 41 | enum v4l2_mbus_pixelcode code; 42 | int h_lsb; 43 | int v_msb; 44 | } ov5647_mbus_fmts[] = { 45 | { V4L2_MBUS_FMT_SBGGR8_1X8, 0, 0 }, 46 | { V4L2_MBUS_FMT_SGBRG8_1X8, 1, 0 }, 47 | { V4L2_MBUS_FMT_SGRBG8_1X8, 0, 1 }, 48 | { V4L2_MBUS_FMT_SRGGB8_1X8, 1, 1 }, 49 | { V4L2_MBUS_FMT_SBGGR10_1X10, 0, 0 }, 50 | { V4L2_MBUS_FMT_SGBRG10_1X10, 1, 0 }, 51 | { V4L2_MBUS_FMT_SGRBG10_1X10, 0, 1 }, 52 | { V4L2_MBUS_FMT_SRGGB10_1X10, 1, 1 }, 53 | }; 54 | 55 | 56 | /* Helpers ---------------------------------------------------------------- */ 57 | 58 | static uint8_t 59 | ov5647_reg_read(struct ov5647 *s, uint16_t reg) 60 | { 61 | int rv; 62 | u8 buf[3]; 63 | struct i2c_msg msgs[2] = { 64 | { 65 | .addr = s->client->addr, 66 | .flags = 0, 67 | .len = 2, 68 | .buf = &buf[0], 69 | }, 70 | { 71 | .addr = s->client->addr, 72 | .flags = I2C_M_RD, 73 | .len = 1, 74 | .buf = &buf[2], 75 | }, 76 | }; 77 | 78 | buf[0] = (reg >> 8) & 0xff; 79 | buf[1] = reg & 0xff; 80 | 81 | rv = i2c_transfer(s->client->adapter, msgs, 2); 82 | 83 | v4l2_dbg(2, debug, s->client, "%s: 0x%02hhx @ 0x%04hx. (%d)\n", 84 | __func__, buf[2], reg, rv); 85 | 86 | return (rv == 2) ? buf[2] : 0x00; 87 | } 88 | 89 | static int 90 | ov5647_reg_write(struct ov5647 *s, uint16_t reg, uint8_t val) 91 | { 92 | int rv; 93 | u8 buf[3]; 94 | struct i2c_msg msg = { 95 | .addr = s->client->addr, 96 | .flags = 0, 97 | .len = 3, 98 | .buf = &buf[0], 99 | }; 100 | 101 | buf[0] = (reg >> 8) & 0xff; 102 | buf[1] = reg & 0xff; 103 | buf[2] = val; 104 | 105 | rv = i2c_transfer(s->client->adapter, &msg, 1); 106 | 107 | v4l2_dbg(2, debug, s->client, "%s: 0x%02hhx @ 0x%04hx. (%d)\n", 108 | __func__, val, reg, rv); 109 | 110 | return rv != 1; 111 | } 112 | 113 | static void 114 | ov5647_power_on(struct ov5647 *s) 115 | { 116 | if (s->gpio_ena) { 117 | gpiod_set_value_cansleep(s->gpio_ena, 1); 118 | msleep(30); /* 5ms ramp-up, 5ms pwdn, 20ms boot */ 119 | } 120 | } 121 | 122 | static void 123 | ov5647_power_off(struct ov5647 *s) 124 | { 125 | if (s->gpio_ena) 126 | gpiod_set_value_cansleep(s->gpio_ena, 0); 127 | } 128 | 129 | 130 | /* V4L sub device --------------------------------------------------------- */ 131 | 132 | /* Core ops */ 133 | 134 | static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd) 135 | { 136 | return container_of(sd, struct ov5647, sd); 137 | } 138 | 139 | 140 | static int 141 | ov5647_co_get_register(struct v4l2_subdev *sd, 142 | struct v4l2_dbg_register *reg) 143 | { 144 | struct ov5647 *s = to_sensor(sd); 145 | reg->val = ov5647_reg_read(s, reg->reg & 0xffff); 146 | reg->size = 1; 147 | return 0; 148 | } 149 | 150 | static int 151 | ov5647_co_set_register(struct v4l2_subdev *sd, 152 | const struct v4l2_dbg_register *reg) 153 | { 154 | struct ov5647 *s = to_sensor(sd); 155 | ov5647_reg_write(s, reg->reg & 0xffff, reg->val & 0xff); 156 | return 0; 157 | } 158 | 159 | static int 160 | ov5647_co_set_power(struct v4l2_subdev *sd, int on) 161 | { 162 | struct ov5647 *s = to_sensor(sd); 163 | 164 | v4l2_dbg(1, debug, s->client, "%s: on: %d\n", __func__, on); 165 | 166 | if (on) { 167 | ov5647_power_on(s); 168 | /* FIXME: Issue init */ 169 | } else 170 | ov5647_power_off(s); 171 | 172 | return 0; 173 | } 174 | 175 | static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = { 176 | #ifdef CONFIG_VIDEO_ADV_DEBUG 177 | .g_register = ov5647_co_get_register, 178 | .s_register = ov5647_co_set_register, 179 | #endif 180 | .s_power = ov5647_co_set_power, 181 | }; 182 | 183 | 184 | /* Pad ops */ 185 | 186 | static int 187 | ov5647_po_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 188 | struct v4l2_subdev_mbus_code_enum *code) 189 | { 190 | if ((code->pad != 0) || (code->index >= ARRAY_SIZE(ov5647_mbus_fmts))) 191 | return -EINVAL; 192 | 193 | code->code = ov5647_mbus_fmts[code->index].code; 194 | 195 | return 0; 196 | } 197 | 198 | static int 199 | ov5647_po_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 200 | struct v4l2_subdev_frame_size_enum *fse) 201 | { 202 | return 0; /* FIXME */ 203 | } 204 | 205 | static int 206 | ov5647_po_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 207 | struct v4l2_subdev_frame_interval_enum *fie) 208 | { 209 | return 0; /* FIXME */ 210 | } 211 | 212 | static int 213 | ov5647_po_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 214 | struct v4l2_subdev_format *format) 215 | { 216 | return 0; /* FIXME */ 217 | } 218 | 219 | static int 220 | ov5647_po_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 221 | struct v4l2_subdev_format *format) 222 | { 223 | return 0; /* FIXME */ 224 | } 225 | 226 | static int 227 | ov5647_po_set_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 228 | struct v4l2_subdev_crop *crop) 229 | { 230 | return 0; /* FIXME */ 231 | } 232 | 233 | static int 234 | ov5647_po_get_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 235 | struct v4l2_subdev_crop *crop) 236 | { 237 | return 0; /* FIXME */ 238 | } 239 | 240 | static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = { 241 | .enum_mbus_code = ov5647_po_enum_mbus_code, 242 | .enum_frame_size = ov5647_po_enum_frame_size, 243 | .enum_frame_interval = ov5647_po_enum_frame_interval, 244 | .get_fmt = ov5647_po_get_fmt, 245 | .set_fmt = ov5647_po_set_fmt, 246 | .get_crop = ov5647_po_get_crop, 247 | .set_crop = ov5647_po_set_crop, 248 | }; 249 | 250 | 251 | /* Video ops */ 252 | 253 | static int 254 | ov5647_vo_set_crystal_freq(struct v4l2_subdev *sd, u32 freq, u32 flags) 255 | { 256 | struct ov5647 *s = to_sensor(sd); 257 | 258 | if ((freq < 6000000) || (freq > 27000000)) 259 | return -EINVAL; 260 | 261 | s->xclk_freq = freq; 262 | 263 | return 0; 264 | } 265 | 266 | static int 267 | ov5647_vo_set_stream(struct v4l2_subdev *sd, int on) 268 | { 269 | struct ov5647 *s = to_sensor(sd); 270 | 271 | v4l2_dbg(1, debug, s->client, "%s: on: %d\n", __func__, on); 272 | 273 | return 0; 274 | } 275 | 276 | static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = { 277 | .s_crystal_freq = ov5647_vo_set_crystal_freq, 278 | .s_stream = ov5647_vo_set_stream, 279 | }; 280 | 281 | 282 | /* SubDev ops */ 283 | 284 | static const struct v4l2_subdev_ops ov5647_ops = { 285 | .core = &ov5647_subdev_core_ops, 286 | .pad = &ov5647_subdev_pad_ops, 287 | .video = &ov5647_subdev_video_ops, 288 | }; 289 | 290 | 291 | /* I2C Driver ------------------------------------------------------------ */ 292 | 293 | static int 294 | ov5647_probe(struct i2c_client *client, const struct i2c_device_id *id) 295 | { 296 | struct ov5647 *s; 297 | int rv; 298 | 299 | /* Get private sensor struct */ 300 | s = devm_kzalloc(&client->dev, sizeof(struct ov5647), GFP_KERNEL); 301 | if (!s) 302 | return -ENOMEM; 303 | 304 | s->client = client; 305 | s->client->flags = I2C_CLIENT_SCCB; 306 | 307 | /* Get GPIO */ 308 | s->gpio_ena = devm_gpiod_get(&client->dev, "enable"); 309 | if (!IS_ERR(s->gpio_ena)) { 310 | gpiod_direction_output(s->gpio_ena, 0); 311 | } else { 312 | s->gpio_ena = NULL; 313 | } 314 | 315 | /* Get XCLK frequency */ 316 | rv = of_property_read_u32(client->dev.of_node, 317 | "clock-frequency", &s->xclk_freq); 318 | if (rv < 0) 319 | s->xclk_freq = 25000000; /* 25 MHz default */ 320 | 321 | /* Power-on briefly to check it's the right sensor */ 322 | ov5647_power_on(s); 323 | 324 | if ((ov5647_reg_read(s, 0x300A) != 0x56) || 325 | (ov5647_reg_read(s, 0x300B) != 0x47)) 326 | { 327 | v4l_err(client, "chip not found\n"); 328 | return -ENODEV; 329 | } 330 | 331 | ov5647_power_off(s); 332 | 333 | v4l_info(client, "chip found @ 0x%02x (%s)\n", 334 | client->addr << 1, client->adapter->name); 335 | 336 | /* V4L init */ 337 | v4l2_i2c_subdev_init(&s->sd, client, &ov5647_ops); 338 | strlcpy(s->sd.name, DRIVER_NAME, sizeof(s->sd.name)); 339 | 340 | s->pad.flags = MEDIA_PAD_FL_SOURCE; 341 | rv = media_entity_init(&s->sd.entity, 1, &s->pad, 0); 342 | if (rv) { 343 | v4l_err(client, "Failed to initialized pad\n"); 344 | goto done; 345 | } 346 | 347 | rv = v4l2_async_register_subdev(&s->sd); 348 | if (rv) { 349 | v4l_err(client, "Failed to register subdev for async detection\n"); 350 | goto done; 351 | } 352 | 353 | rv = 0; 354 | 355 | done: 356 | if (rv > 0) { 357 | media_entity_cleanup(&s->sd.entity); 358 | } 359 | 360 | return rv; 361 | } 362 | 363 | static int 364 | ov5647_remove(struct i2c_client *client) 365 | { 366 | struct ov5647 *s = i2c_get_clientdata(client); 367 | 368 | v4l2_device_unregister_subdev(&s->sd); 369 | 370 | return 0; 371 | } 372 | 373 | 374 | static const struct i2c_device_id ov5647_id[] = { 375 | { DRIVER_NAME, 0 }, 376 | { } 377 | }; 378 | MODULE_DEVICE_TABLE(i2c, ov5647_id); 379 | 380 | static const struct of_device_id ov5647_of_match[] = { 381 | { .compatible = "omnivision,ov5647" }, 382 | { } 383 | }; 384 | MODULE_DEVICE_TABLE(of, ov5647_of_match); 385 | 386 | static struct i2c_driver ov5647_driver = { 387 | .probe = ov5647_probe, 388 | .remove = ov5647_remove, 389 | .id_table = ov5647_id, 390 | .driver = { 391 | .owner = THIS_MODULE, 392 | .name = DRIVER_NAME, 393 | .of_match_table = ov5647_of_match, 394 | }, 395 | }; 396 | module_i2c_driver(ov5647_driver); 397 | 398 | MODULE_AUTHOR("Sylvain Munaut "); 399 | MODULE_DESCRIPTION("Omnivision OV5647 5MP sensor driver (MIPI CSI-2 mode)"); 400 | MODULE_LICENSE("GPL"); 401 | --------------------------------------------------------------------------------