Sakari Ailus | 39aee69 | 2008-12-01 15:40:09 -0300 | [diff] [blame] | 1 | /* |
| 2 | * drivers/media/video/omap24xxcam.c |
| 3 | * |
| 4 | * OMAP 2 camera block driver. |
| 5 | * |
| 6 | * Copyright (C) 2004 MontaVista Software, Inc. |
| 7 | * Copyright (C) 2004 Texas Instruments. |
| 8 | * Copyright (C) 2007-2008 Nokia Corporation. |
| 9 | * |
| 10 | * Contact: Sakari Ailus <sakari.ailus@nokia.com> |
| 11 | * |
| 12 | * Based on code from Andy Lowe <source@mvista.com> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or |
| 15 | * modify it under the terms of the GNU General Public License |
| 16 | * version 2 as published by the Free Software Foundation. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, but |
| 19 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | * General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 26 | * 02110-1301 USA |
| 27 | */ |
| 28 | |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/interrupt.h> |
| 32 | #include <linux/videodev2.h> |
| 33 | #include <linux/pci.h> /* needed for videobufs */ |
| 34 | #include <linux/version.h> |
| 35 | #include <linux/platform_device.h> |
| 36 | #include <linux/clk.h> |
| 37 | #include <linux/io.h> |
| 38 | |
| 39 | #include <media/v4l2-common.h> |
| 40 | #include <media/v4l2-ioctl.h> |
| 41 | |
| 42 | #include "omap24xxcam.h" |
| 43 | |
| 44 | #define OMAP24XXCAM_VERSION KERNEL_VERSION(0, 0, 0) |
| 45 | |
| 46 | #define RESET_TIMEOUT_NS 10000 |
| 47 | |
| 48 | static void omap24xxcam_reset(struct omap24xxcam_device *cam); |
| 49 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam); |
| 50 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s); |
| 51 | static int omap24xxcam_remove(struct platform_device *pdev); |
| 52 | |
| 53 | /* module parameters */ |
| 54 | static int video_nr = -1; /* video device minor (-1 ==> auto assign) */ |
| 55 | /* |
| 56 | * Maximum amount of memory to use for capture buffers. |
| 57 | * Default is 4800KB, enough to double-buffer SXGA. |
| 58 | */ |
| 59 | static int capture_mem = 1280 * 960 * 2 * 2; |
| 60 | |
| 61 | static struct v4l2_int_device omap24xxcam; |
| 62 | |
| 63 | /* |
| 64 | * |
| 65 | * Clocks. |
| 66 | * |
| 67 | */ |
| 68 | |
| 69 | static void omap24xxcam_clock_put(struct omap24xxcam_device *cam) |
| 70 | { |
| 71 | if (cam->ick != NULL && !IS_ERR(cam->ick)) |
| 72 | clk_put(cam->ick); |
| 73 | if (cam->fck != NULL && !IS_ERR(cam->fck)) |
| 74 | clk_put(cam->fck); |
| 75 | |
| 76 | cam->ick = cam->fck = NULL; |
| 77 | } |
| 78 | |
| 79 | static int omap24xxcam_clock_get(struct omap24xxcam_device *cam) |
| 80 | { |
| 81 | int rval = 0; |
| 82 | |
| 83 | cam->fck = clk_get(cam->dev, "cam_fck"); |
| 84 | if (IS_ERR(cam->fck)) { |
| 85 | dev_err(cam->dev, "can't get cam_fck"); |
| 86 | rval = PTR_ERR(cam->fck); |
| 87 | omap24xxcam_clock_put(cam); |
| 88 | return rval; |
| 89 | } |
| 90 | |
| 91 | cam->ick = clk_get(cam->dev, "cam_ick"); |
| 92 | if (IS_ERR(cam->ick)) { |
| 93 | dev_err(cam->dev, "can't get cam_ick"); |
| 94 | rval = PTR_ERR(cam->ick); |
| 95 | omap24xxcam_clock_put(cam); |
| 96 | } |
| 97 | |
| 98 | return rval; |
| 99 | } |
| 100 | |
| 101 | static void omap24xxcam_clock_on(struct omap24xxcam_device *cam) |
| 102 | { |
| 103 | clk_enable(cam->fck); |
| 104 | clk_enable(cam->ick); |
| 105 | } |
| 106 | |
| 107 | static void omap24xxcam_clock_off(struct omap24xxcam_device *cam) |
| 108 | { |
| 109 | clk_disable(cam->fck); |
| 110 | clk_disable(cam->ick); |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * |
| 115 | * Camera core |
| 116 | * |
| 117 | */ |
| 118 | |
| 119 | /* |
| 120 | * Set xclk. |
| 121 | * |
| 122 | * To disable xclk, use value zero. |
| 123 | */ |
| 124 | static void omap24xxcam_core_xclk_set(const struct omap24xxcam_device *cam, |
| 125 | u32 xclk) |
| 126 | { |
| 127 | if (xclk) { |
| 128 | u32 divisor = CAM_MCLK / xclk; |
| 129 | |
| 130 | if (divisor == 1) |
| 131 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, |
| 132 | CC_CTRL_XCLK, |
| 133 | CC_CTRL_XCLK_DIV_BYPASS); |
| 134 | else |
| 135 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, |
| 136 | CC_CTRL_XCLK, divisor); |
| 137 | } else |
| 138 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, |
| 139 | CC_CTRL_XCLK, CC_CTRL_XCLK_DIV_STABLE_LOW); |
| 140 | } |
| 141 | |
| 142 | static void omap24xxcam_core_hwinit(const struct omap24xxcam_device *cam) |
| 143 | { |
| 144 | /* |
| 145 | * Setting the camera core AUTOIDLE bit causes problems with frame |
| 146 | * synchronization, so we will clear the AUTOIDLE bit instead. |
| 147 | */ |
| 148 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_SYSCONFIG, |
| 149 | CC_SYSCONFIG_AUTOIDLE); |
| 150 | |
| 151 | /* program the camera interface DMA packet size */ |
| 152 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL_DMA, |
| 153 | CC_CTRL_DMA_EN | (DMA_THRESHOLD / 4 - 1)); |
| 154 | |
| 155 | /* enable camera core error interrupts */ |
| 156 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQENABLE, |
| 157 | CC_IRQENABLE_FW_ERR_IRQ |
| 158 | | CC_IRQENABLE_FSC_ERR_IRQ |
| 159 | | CC_IRQENABLE_SSC_ERR_IRQ |
| 160 | | CC_IRQENABLE_FIFO_OF_IRQ); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Enable the camera core. |
| 165 | * |
| 166 | * Data transfer to the camera DMA starts from next starting frame. |
| 167 | */ |
| 168 | static void omap24xxcam_core_enable(const struct omap24xxcam_device *cam) |
| 169 | { |
| 170 | |
| 171 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, |
| 172 | cam->cc_ctrl); |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Disable camera core. |
| 177 | * |
| 178 | * The data transfer will be stopped immediately (CC_CTRL_CC_RST). The |
| 179 | * core internal state machines will be reset. Use |
| 180 | * CC_CTRL_CC_FRAME_TRIG instead if you want to transfer the current |
| 181 | * frame completely. |
| 182 | */ |
| 183 | static void omap24xxcam_core_disable(const struct omap24xxcam_device *cam) |
| 184 | { |
| 185 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, |
| 186 | CC_CTRL_CC_RST); |
| 187 | } |
| 188 | |
| 189 | /* Interrupt service routine for camera core interrupts. */ |
| 190 | static void omap24xxcam_core_isr(struct omap24xxcam_device *cam) |
| 191 | { |
| 192 | u32 cc_irqstatus; |
| 193 | const u32 cc_irqstatus_err = |
| 194 | CC_IRQSTATUS_FW_ERR_IRQ |
| 195 | | CC_IRQSTATUS_FSC_ERR_IRQ |
| 196 | | CC_IRQSTATUS_SSC_ERR_IRQ |
| 197 | | CC_IRQSTATUS_FIFO_UF_IRQ |
| 198 | | CC_IRQSTATUS_FIFO_OF_IRQ; |
| 199 | |
| 200 | cc_irqstatus = omap24xxcam_reg_in(cam->mmio_base + CC_REG_OFFSET, |
| 201 | CC_IRQSTATUS); |
| 202 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQSTATUS, |
| 203 | cc_irqstatus); |
| 204 | |
| 205 | if (cc_irqstatus & cc_irqstatus_err |
| 206 | && !atomic_read(&cam->in_reset)) { |
| 207 | dev_dbg(cam->dev, "resetting camera, cc_irqstatus 0x%x\n", |
| 208 | cc_irqstatus); |
| 209 | omap24xxcam_reset(cam); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * |
| 215 | * videobuf_buffer handling. |
| 216 | * |
| 217 | * Memory for mmapped videobuf_buffers is not allocated |
| 218 | * conventionally, but by several kmalloc allocations and then |
| 219 | * creating the scatterlist on our own. User-space buffers are handled |
| 220 | * normally. |
| 221 | * |
| 222 | */ |
| 223 | |
| 224 | /* |
| 225 | * Free the memory-mapped buffer memory allocated for a |
| 226 | * videobuf_buffer and the associated scatterlist. |
| 227 | */ |
| 228 | static void omap24xxcam_vbq_free_mmap_buffer(struct videobuf_buffer *vb) |
| 229 | { |
| 230 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); |
| 231 | size_t alloc_size; |
| 232 | struct page *page; |
| 233 | int i; |
| 234 | |
| 235 | if (dma->sglist == NULL) |
| 236 | return; |
| 237 | |
| 238 | i = dma->sglen; |
| 239 | while (i) { |
| 240 | i--; |
| 241 | alloc_size = sg_dma_len(&dma->sglist[i]); |
| 242 | page = sg_page(&dma->sglist[i]); |
| 243 | do { |
| 244 | ClearPageReserved(page++); |
| 245 | } while (alloc_size -= PAGE_SIZE); |
| 246 | __free_pages(sg_page(&dma->sglist[i]), |
| 247 | get_order(sg_dma_len(&dma->sglist[i]))); |
| 248 | } |
| 249 | |
| 250 | kfree(dma->sglist); |
| 251 | dma->sglist = NULL; |
| 252 | } |
| 253 | |
| 254 | /* Release all memory related to the videobuf_queue. */ |
| 255 | static void omap24xxcam_vbq_free_mmap_buffers(struct videobuf_queue *vbq) |
| 256 | { |
| 257 | int i; |
| 258 | |
| 259 | mutex_lock(&vbq->vb_lock); |
| 260 | |
| 261 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
| 262 | if (NULL == vbq->bufs[i]) |
| 263 | continue; |
| 264 | if (V4L2_MEMORY_MMAP != vbq->bufs[i]->memory) |
| 265 | continue; |
| 266 | vbq->ops->buf_release(vbq, vbq->bufs[i]); |
| 267 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); |
| 268 | kfree(vbq->bufs[i]); |
| 269 | vbq->bufs[i] = NULL; |
| 270 | } |
| 271 | |
| 272 | mutex_unlock(&vbq->vb_lock); |
| 273 | |
| 274 | videobuf_mmap_free(vbq); |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * Allocate physically as contiguous as possible buffer for video |
| 279 | * frame and allocate and build DMA scatter-gather list for it. |
| 280 | */ |
| 281 | static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb) |
| 282 | { |
| 283 | unsigned int order; |
| 284 | size_t alloc_size, size = vb->bsize; /* vb->bsize is page aligned */ |
| 285 | struct page *page; |
| 286 | int max_pages, err = 0, i = 0; |
| 287 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); |
| 288 | |
| 289 | /* |
| 290 | * allocate maximum size scatter-gather list. Note this is |
| 291 | * overhead. We may not use as many entries as we allocate |
| 292 | */ |
| 293 | max_pages = vb->bsize >> PAGE_SHIFT; |
| 294 | dma->sglist = kcalloc(max_pages, sizeof(*dma->sglist), GFP_KERNEL); |
| 295 | if (dma->sglist == NULL) { |
| 296 | err = -ENOMEM; |
| 297 | goto out; |
| 298 | } |
| 299 | |
| 300 | while (size) { |
| 301 | order = get_order(size); |
| 302 | /* |
| 303 | * do not over-allocate even if we would get larger |
| 304 | * contiguous chunk that way |
| 305 | */ |
| 306 | if ((PAGE_SIZE << order) > size) |
| 307 | order--; |
| 308 | |
| 309 | /* try to allocate as many contiguous pages as possible */ |
| 310 | page = alloc_pages(GFP_KERNEL | GFP_DMA, order); |
| 311 | /* if allocation fails, try to allocate smaller amount */ |
| 312 | while (page == NULL) { |
| 313 | order--; |
| 314 | page = alloc_pages(GFP_KERNEL | GFP_DMA, order); |
| 315 | if (page == NULL && !order) { |
| 316 | err = -ENOMEM; |
| 317 | goto out; |
| 318 | } |
| 319 | } |
| 320 | size -= (PAGE_SIZE << order); |
| 321 | |
| 322 | /* append allocated chunk of pages into scatter-gather list */ |
| 323 | sg_set_page(&dma->sglist[i], page, PAGE_SIZE << order, 0); |
| 324 | dma->sglen++; |
| 325 | i++; |
| 326 | |
| 327 | alloc_size = (PAGE_SIZE << order); |
| 328 | |
| 329 | /* clear pages before giving them to user space */ |
| 330 | memset(page_address(page), 0, alloc_size); |
| 331 | |
| 332 | /* mark allocated pages reserved */ |
| 333 | do { |
| 334 | SetPageReserved(page++); |
| 335 | } while (alloc_size -= PAGE_SIZE); |
| 336 | } |
| 337 | /* |
| 338 | * REVISIT: not fully correct to assign nr_pages == sglen but |
| 339 | * video-buf is passing nr_pages for e.g. unmap_sg calls |
| 340 | */ |
| 341 | dma->nr_pages = dma->sglen; |
| 342 | dma->direction = PCI_DMA_FROMDEVICE; |
| 343 | |
| 344 | return 0; |
| 345 | |
| 346 | out: |
| 347 | omap24xxcam_vbq_free_mmap_buffer(vb); |
| 348 | return err; |
| 349 | } |
| 350 | |
| 351 | static int omap24xxcam_vbq_alloc_mmap_buffers(struct videobuf_queue *vbq, |
| 352 | unsigned int count) |
| 353 | { |
| 354 | int i, err = 0; |
| 355 | struct omap24xxcam_fh *fh = |
| 356 | container_of(vbq, struct omap24xxcam_fh, vbq); |
| 357 | |
| 358 | mutex_lock(&vbq->vb_lock); |
| 359 | |
| 360 | for (i = 0; i < count; i++) { |
| 361 | err = omap24xxcam_vbq_alloc_mmap_buffer(vbq->bufs[i]); |
| 362 | if (err) |
| 363 | goto out; |
| 364 | dev_dbg(fh->cam->dev, "sglen is %d for buffer %d\n", |
| 365 | videobuf_to_dma(vbq->bufs[i])->sglen, i); |
| 366 | } |
| 367 | |
| 368 | mutex_unlock(&vbq->vb_lock); |
| 369 | |
| 370 | return 0; |
| 371 | out: |
| 372 | while (i) { |
| 373 | i--; |
| 374 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); |
| 375 | } |
| 376 | |
| 377 | mutex_unlock(&vbq->vb_lock); |
| 378 | |
| 379 | return err; |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * This routine is called from interrupt context when a scatter-gather DMA |
| 384 | * transfer of a videobuf_buffer completes. |
| 385 | */ |
| 386 | static void omap24xxcam_vbq_complete(struct omap24xxcam_sgdma *sgdma, |
| 387 | u32 csr, void *arg) |
| 388 | { |
| 389 | struct omap24xxcam_device *cam = |
| 390 | container_of(sgdma, struct omap24xxcam_device, sgdma); |
| 391 | struct omap24xxcam_fh *fh = cam->streaming->private_data; |
| 392 | struct videobuf_buffer *vb = (struct videobuf_buffer *)arg; |
| 393 | const u32 csr_error = CAMDMA_CSR_MISALIGNED_ERR |
| 394 | | CAMDMA_CSR_SUPERVISOR_ERR | CAMDMA_CSR_SECURE_ERR |
| 395 | | CAMDMA_CSR_TRANS_ERR | CAMDMA_CSR_DROP; |
| 396 | unsigned long flags; |
| 397 | |
| 398 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); |
| 399 | if (--cam->sgdma_in_queue == 0) |
| 400 | omap24xxcam_core_disable(cam); |
| 401 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); |
| 402 | |
| 403 | do_gettimeofday(&vb->ts); |
| 404 | vb->field_count = atomic_add_return(2, &fh->field_count); |
| 405 | if (csr & csr_error) { |
| 406 | vb->state = VIDEOBUF_ERROR; |
| 407 | if (!atomic_read(&fh->cam->in_reset)) { |
| 408 | dev_dbg(cam->dev, "resetting camera, csr 0x%x\n", csr); |
| 409 | omap24xxcam_reset(cam); |
| 410 | } |
| 411 | } else |
| 412 | vb->state = VIDEOBUF_DONE; |
| 413 | wake_up(&vb->done); |
| 414 | } |
| 415 | |
| 416 | static void omap24xxcam_vbq_release(struct videobuf_queue *vbq, |
| 417 | struct videobuf_buffer *vb) |
| 418 | { |
| 419 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); |
| 420 | |
| 421 | /* wait for buffer, especially to get out of the sgdma queue */ |
| 422 | videobuf_waiton(vb, 0, 0); |
| 423 | if (vb->memory == V4L2_MEMORY_MMAP) { |
| 424 | dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen, |
| 425 | dma->direction); |
| 426 | dma->direction = DMA_NONE; |
| 427 | } else { |
| 428 | videobuf_dma_unmap(vbq, videobuf_to_dma(vb)); |
| 429 | videobuf_dma_free(videobuf_to_dma(vb)); |
| 430 | } |
| 431 | |
| 432 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * Limit the number of available kernel image capture buffers based on the |
| 437 | * number requested, the currently selected image size, and the maximum |
| 438 | * amount of memory permitted for kernel capture buffers. |
| 439 | */ |
| 440 | static int omap24xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt, |
| 441 | unsigned int *size) |
| 442 | { |
| 443 | struct omap24xxcam_fh *fh = vbq->priv_data; |
| 444 | |
| 445 | if (*cnt <= 0) |
| 446 | *cnt = VIDEO_MAX_FRAME; /* supply a default number of buffers */ |
| 447 | |
| 448 | if (*cnt > VIDEO_MAX_FRAME) |
| 449 | *cnt = VIDEO_MAX_FRAME; |
| 450 | |
| 451 | *size = fh->pix.sizeimage; |
| 452 | |
| 453 | /* accessing fh->cam->capture_mem is ok, it's constant */ |
| 454 | while (*size * *cnt > fh->cam->capture_mem) |
| 455 | (*cnt)--; |
| 456 | |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | static int omap24xxcam_dma_iolock(struct videobuf_queue *vbq, |
| 461 | struct videobuf_dmabuf *dma) |
| 462 | { |
| 463 | int err = 0; |
| 464 | |
| 465 | dma->direction = PCI_DMA_FROMDEVICE; |
| 466 | if (!dma_map_sg(vbq->dev, dma->sglist, dma->sglen, dma->direction)) { |
| 467 | kfree(dma->sglist); |
| 468 | dma->sglist = NULL; |
| 469 | dma->sglen = 0; |
| 470 | err = -EIO; |
| 471 | } |
| 472 | |
| 473 | return err; |
| 474 | } |
| 475 | |
| 476 | static int omap24xxcam_vbq_prepare(struct videobuf_queue *vbq, |
| 477 | struct videobuf_buffer *vb, |
| 478 | enum v4l2_field field) |
| 479 | { |
| 480 | struct omap24xxcam_fh *fh = vbq->priv_data; |
| 481 | int err = 0; |
| 482 | |
| 483 | /* |
| 484 | * Accessing pix here is okay since it's constant while |
| 485 | * streaming is on (and we only get called then). |
| 486 | */ |
| 487 | if (vb->baddr) { |
| 488 | /* This is a userspace buffer. */ |
| 489 | if (fh->pix.sizeimage > vb->bsize) { |
| 490 | /* The buffer isn't big enough. */ |
| 491 | err = -EINVAL; |
| 492 | } else |
| 493 | vb->size = fh->pix.sizeimage; |
| 494 | } else { |
| 495 | if (vb->state != VIDEOBUF_NEEDS_INIT) { |
| 496 | /* |
| 497 | * We have a kernel bounce buffer that has |
| 498 | * already been allocated. |
| 499 | */ |
| 500 | if (fh->pix.sizeimage > vb->size) { |
| 501 | /* |
| 502 | * The image size has been changed to |
| 503 | * a larger size since this buffer was |
| 504 | * allocated, so we need to free and |
| 505 | * reallocate it. |
| 506 | */ |
| 507 | omap24xxcam_vbq_release(vbq, vb); |
| 508 | vb->size = fh->pix.sizeimage; |
| 509 | } |
| 510 | } else { |
| 511 | /* We need to allocate a new kernel bounce buffer. */ |
| 512 | vb->size = fh->pix.sizeimage; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | if (err) |
| 517 | return err; |
| 518 | |
| 519 | vb->width = fh->pix.width; |
| 520 | vb->height = fh->pix.height; |
| 521 | vb->field = field; |
| 522 | |
| 523 | if (vb->state == VIDEOBUF_NEEDS_INIT) { |
| 524 | if (vb->memory == V4L2_MEMORY_MMAP) |
| 525 | /* |
| 526 | * we have built the scatter-gather list by ourself so |
| 527 | * do the scatter-gather mapping as well |
| 528 | */ |
| 529 | err = omap24xxcam_dma_iolock(vbq, videobuf_to_dma(vb)); |
| 530 | else |
| 531 | err = videobuf_iolock(vbq, vb, NULL); |
| 532 | } |
| 533 | |
| 534 | if (!err) |
| 535 | vb->state = VIDEOBUF_PREPARED; |
| 536 | else |
| 537 | omap24xxcam_vbq_release(vbq, vb); |
| 538 | |
| 539 | return err; |
| 540 | } |
| 541 | |
| 542 | static void omap24xxcam_vbq_queue(struct videobuf_queue *vbq, |
| 543 | struct videobuf_buffer *vb) |
| 544 | { |
| 545 | struct omap24xxcam_fh *fh = vbq->priv_data; |
| 546 | struct omap24xxcam_device *cam = fh->cam; |
| 547 | enum videobuf_state state = vb->state; |
| 548 | unsigned long flags; |
| 549 | int err; |
| 550 | |
| 551 | /* |
| 552 | * FIXME: We're marking the buffer active since we have no |
| 553 | * pretty way of marking it active exactly when the |
| 554 | * scatter-gather transfer starts. |
| 555 | */ |
| 556 | vb->state = VIDEOBUF_ACTIVE; |
| 557 | |
| 558 | err = omap24xxcam_sgdma_queue(&fh->cam->sgdma, |
| 559 | videobuf_to_dma(vb)->sglist, |
| 560 | videobuf_to_dma(vb)->sglen, vb->size, |
| 561 | omap24xxcam_vbq_complete, vb); |
| 562 | |
| 563 | if (!err) { |
| 564 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); |
| 565 | if (++cam->sgdma_in_queue == 1 |
| 566 | && !atomic_read(&cam->in_reset)) |
| 567 | omap24xxcam_core_enable(cam); |
| 568 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); |
| 569 | } else { |
| 570 | /* |
| 571 | * Oops. We're not supposed to get any errors here. |
| 572 | * The only way we could get an error is if we ran out |
| 573 | * of scatter-gather DMA slots, but we are supposed to |
| 574 | * have at least as many scatter-gather DMA slots as |
| 575 | * video buffers so that can't happen. |
| 576 | */ |
| 577 | dev_err(cam->dev, "failed to queue a video buffer for dma!\n"); |
| 578 | dev_err(cam->dev, "likely a bug in the driver!\n"); |
| 579 | vb->state = state; |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | static struct videobuf_queue_ops omap24xxcam_vbq_ops = { |
| 584 | .buf_setup = omap24xxcam_vbq_setup, |
| 585 | .buf_prepare = omap24xxcam_vbq_prepare, |
| 586 | .buf_queue = omap24xxcam_vbq_queue, |
| 587 | .buf_release = omap24xxcam_vbq_release, |
| 588 | }; |
| 589 | |
| 590 | /* |
| 591 | * |
| 592 | * OMAP main camera system |
| 593 | * |
| 594 | */ |
| 595 | |
| 596 | /* |
| 597 | * Reset camera block to power-on state. |
| 598 | */ |
| 599 | static void omap24xxcam_poweron_reset(struct omap24xxcam_device *cam) |
| 600 | { |
| 601 | int max_loop = RESET_TIMEOUT_NS; |
| 602 | |
| 603 | /* Reset whole camera subsystem */ |
| 604 | omap24xxcam_reg_out(cam->mmio_base, |
| 605 | CAM_SYSCONFIG, |
| 606 | CAM_SYSCONFIG_SOFTRESET); |
| 607 | |
| 608 | /* Wait till it's finished */ |
| 609 | while (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) |
| 610 | & CAM_SYSSTATUS_RESETDONE) |
| 611 | && --max_loop) { |
| 612 | ndelay(1); |
| 613 | } |
| 614 | |
| 615 | if (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) |
| 616 | & CAM_SYSSTATUS_RESETDONE)) |
| 617 | dev_err(cam->dev, "camera soft reset timeout\n"); |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * (Re)initialise the camera block. |
| 622 | */ |
| 623 | static void omap24xxcam_hwinit(struct omap24xxcam_device *cam) |
| 624 | { |
| 625 | omap24xxcam_poweron_reset(cam); |
| 626 | |
| 627 | /* set the camera subsystem autoidle bit */ |
| 628 | omap24xxcam_reg_out(cam->mmio_base, CAM_SYSCONFIG, |
| 629 | CAM_SYSCONFIG_AUTOIDLE); |
| 630 | |
| 631 | /* set the camera MMU autoidle bit */ |
| 632 | omap24xxcam_reg_out(cam->mmio_base, |
| 633 | CAMMMU_REG_OFFSET + CAMMMU_SYSCONFIG, |
| 634 | CAMMMU_SYSCONFIG_AUTOIDLE); |
| 635 | |
| 636 | omap24xxcam_core_hwinit(cam); |
| 637 | |
| 638 | omap24xxcam_dma_hwinit(&cam->sgdma.dma); |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * Callback for dma transfer stalling. |
| 643 | */ |
| 644 | static void omap24xxcam_stalled_dma_reset(unsigned long data) |
| 645 | { |
| 646 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)data; |
| 647 | |
| 648 | if (!atomic_read(&cam->in_reset)) { |
| 649 | dev_dbg(cam->dev, "dma stalled, resetting camera\n"); |
| 650 | omap24xxcam_reset(cam); |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | /* |
| 655 | * Stop capture. Mark we're doing a reset, stop DMA transfers and |
| 656 | * core. (No new scatter-gather transfers will be queued whilst |
| 657 | * in_reset is non-zero.) |
| 658 | * |
| 659 | * If omap24xxcam_capture_stop is called from several places at |
| 660 | * once, only the first call will have an effect. Similarly, the last |
| 661 | * call omap24xxcam_streaming_cont will have effect. |
| 662 | * |
| 663 | * Serialisation is ensured by using cam->core_enable_disable_lock. |
| 664 | */ |
| 665 | static void omap24xxcam_capture_stop(struct omap24xxcam_device *cam) |
| 666 | { |
| 667 | unsigned long flags; |
| 668 | |
| 669 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); |
| 670 | |
| 671 | if (atomic_inc_return(&cam->in_reset) != 1) { |
| 672 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); |
| 673 | return; |
| 674 | } |
| 675 | |
| 676 | omap24xxcam_core_disable(cam); |
| 677 | |
| 678 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); |
| 679 | |
| 680 | omap24xxcam_sgdma_sync(&cam->sgdma); |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Reset and continue streaming. |
| 685 | * |
| 686 | * Note: Resetting the camera FIFO via the CC_RST bit in the CC_CTRL |
| 687 | * register is supposed to be sufficient to recover from a camera |
| 688 | * interface error, but it doesn't seem to be enough. If we only do |
| 689 | * that then subsequent image captures are out of sync by either one |
| 690 | * or two times DMA_THRESHOLD bytes. Resetting and re-initializing the |
| 691 | * entire camera subsystem prevents the problem with frame |
| 692 | * synchronization. |
| 693 | */ |
| 694 | static void omap24xxcam_capture_cont(struct omap24xxcam_device *cam) |
| 695 | { |
| 696 | unsigned long flags; |
| 697 | |
| 698 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); |
| 699 | |
| 700 | if (atomic_read(&cam->in_reset) != 1) |
| 701 | goto out; |
| 702 | |
| 703 | omap24xxcam_hwinit(cam); |
| 704 | |
| 705 | omap24xxcam_sensor_if_enable(cam); |
| 706 | |
| 707 | omap24xxcam_sgdma_process(&cam->sgdma); |
| 708 | |
| 709 | if (cam->sgdma_in_queue) |
| 710 | omap24xxcam_core_enable(cam); |
| 711 | |
| 712 | out: |
| 713 | atomic_dec(&cam->in_reset); |
| 714 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); |
| 715 | } |
| 716 | |
| 717 | static ssize_t |
| 718 | omap24xxcam_streaming_show(struct device *dev, struct device_attribute *attr, |
| 719 | char *buf) |
| 720 | { |
| 721 | struct omap24xxcam_device *cam = dev_get_drvdata(dev); |
| 722 | |
| 723 | return sprintf(buf, "%s\n", cam->streaming ? "active" : "inactive"); |
| 724 | } |
| 725 | static DEVICE_ATTR(streaming, S_IRUGO, omap24xxcam_streaming_show, NULL); |
| 726 | |
| 727 | /* |
| 728 | * Stop capture and restart it. I.e. reset the camera during use. |
| 729 | */ |
| 730 | static void omap24xxcam_reset(struct omap24xxcam_device *cam) |
| 731 | { |
| 732 | omap24xxcam_capture_stop(cam); |
| 733 | omap24xxcam_capture_cont(cam); |
| 734 | } |
| 735 | |
| 736 | /* |
| 737 | * The main interrupt handler. |
| 738 | */ |
| 739 | static irqreturn_t omap24xxcam_isr(int irq, void *arg) |
| 740 | { |
| 741 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)arg; |
| 742 | u32 irqstatus; |
| 743 | unsigned int irqhandled = 0; |
| 744 | |
| 745 | irqstatus = omap24xxcam_reg_in(cam->mmio_base, CAM_IRQSTATUS); |
| 746 | |
| 747 | if (irqstatus & |
| 748 | (CAM_IRQSTATUS_DMA_IRQ2 | CAM_IRQSTATUS_DMA_IRQ1 |
| 749 | | CAM_IRQSTATUS_DMA_IRQ0)) { |
| 750 | omap24xxcam_dma_isr(&cam->sgdma.dma); |
| 751 | irqhandled = 1; |
| 752 | } |
| 753 | if (irqstatus & CAM_IRQSTATUS_CC_IRQ) { |
| 754 | omap24xxcam_core_isr(cam); |
| 755 | irqhandled = 1; |
| 756 | } |
| 757 | if (irqstatus & CAM_IRQSTATUS_MMU_IRQ) |
| 758 | dev_err(cam->dev, "unhandled camera MMU interrupt!\n"); |
| 759 | |
| 760 | return IRQ_RETVAL(irqhandled); |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * |
| 765 | * Sensor handling. |
| 766 | * |
| 767 | */ |
| 768 | |
| 769 | /* |
| 770 | * Enable the external sensor interface. Try to negotiate interface |
| 771 | * parameters with the sensor and start using the new ones. The calls |
| 772 | * to sensor_if_enable and sensor_if_disable need not to be balanced. |
| 773 | */ |
| 774 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam) |
| 775 | { |
| 776 | int rval; |
| 777 | struct v4l2_ifparm p; |
| 778 | |
| 779 | rval = vidioc_int_g_ifparm(cam->sdev, &p); |
| 780 | if (rval) { |
| 781 | dev_err(cam->dev, "vidioc_int_g_ifparm failed with %d\n", rval); |
| 782 | return rval; |
| 783 | } |
| 784 | |
| 785 | cam->if_type = p.if_type; |
| 786 | |
| 787 | cam->cc_ctrl = CC_CTRL_CC_EN; |
| 788 | |
| 789 | switch (p.if_type) { |
| 790 | case V4L2_IF_TYPE_BT656: |
| 791 | if (p.u.bt656.frame_start_on_rising_vs) |
| 792 | cam->cc_ctrl |= CC_CTRL_NOBT_SYNCHRO; |
| 793 | if (p.u.bt656.bt_sync_correct) |
| 794 | cam->cc_ctrl |= CC_CTRL_BT_CORRECT; |
| 795 | if (p.u.bt656.swap) |
| 796 | cam->cc_ctrl |= CC_CTRL_PAR_ORDERCAM; |
| 797 | if (p.u.bt656.latch_clk_inv) |
| 798 | cam->cc_ctrl |= CC_CTRL_PAR_CLK_POL; |
| 799 | if (p.u.bt656.nobt_hs_inv) |
| 800 | cam->cc_ctrl |= CC_CTRL_NOBT_HS_POL; |
| 801 | if (p.u.bt656.nobt_vs_inv) |
| 802 | cam->cc_ctrl |= CC_CTRL_NOBT_VS_POL; |
| 803 | |
| 804 | switch (p.u.bt656.mode) { |
| 805 | case V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT: |
| 806 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT8; |
| 807 | break; |
| 808 | case V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT: |
| 809 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT10; |
| 810 | break; |
| 811 | case V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT: |
| 812 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT12; |
| 813 | break; |
| 814 | case V4L2_IF_TYPE_BT656_MODE_BT_8BIT: |
| 815 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT8; |
| 816 | break; |
| 817 | case V4L2_IF_TYPE_BT656_MODE_BT_10BIT: |
| 818 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT10; |
| 819 | break; |
| 820 | default: |
| 821 | dev_err(cam->dev, |
| 822 | "bt656 interface mode %d not supported\n", |
| 823 | p.u.bt656.mode); |
| 824 | return -EINVAL; |
| 825 | } |
| 826 | /* |
| 827 | * The clock rate that the sensor wants has changed. |
| 828 | * We have to adjust the xclk from OMAP 2 side to |
| 829 | * match the sensor's wish as closely as possible. |
| 830 | */ |
| 831 | if (p.u.bt656.clock_curr != cam->if_u.bt656.xclk) { |
| 832 | u32 xclk = p.u.bt656.clock_curr; |
| 833 | u32 divisor; |
| 834 | |
| 835 | if (xclk == 0) |
| 836 | return -EINVAL; |
| 837 | |
| 838 | if (xclk > CAM_MCLK) |
| 839 | xclk = CAM_MCLK; |
| 840 | |
| 841 | divisor = CAM_MCLK / xclk; |
| 842 | if (divisor * xclk < CAM_MCLK) |
| 843 | divisor++; |
| 844 | if (CAM_MCLK / divisor < p.u.bt656.clock_min |
| 845 | && divisor > 1) |
| 846 | divisor--; |
| 847 | if (divisor > 30) |
| 848 | divisor = 30; |
| 849 | |
| 850 | xclk = CAM_MCLK / divisor; |
| 851 | |
| 852 | if (xclk < p.u.bt656.clock_min |
| 853 | || xclk > p.u.bt656.clock_max) |
| 854 | return -EINVAL; |
| 855 | |
| 856 | cam->if_u.bt656.xclk = xclk; |
| 857 | } |
| 858 | omap24xxcam_core_xclk_set(cam, cam->if_u.bt656.xclk); |
| 859 | break; |
| 860 | default: |
| 861 | /* FIXME: how about other interfaces? */ |
| 862 | dev_err(cam->dev, "interface type %d not supported\n", |
| 863 | p.if_type); |
| 864 | return -EINVAL; |
| 865 | } |
| 866 | |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | static void omap24xxcam_sensor_if_disable(const struct omap24xxcam_device *cam) |
| 871 | { |
| 872 | switch (cam->if_type) { |
| 873 | case V4L2_IF_TYPE_BT656: |
| 874 | omap24xxcam_core_xclk_set(cam, 0); |
| 875 | break; |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | /* |
| 880 | * Initialise the sensor hardware. |
| 881 | */ |
| 882 | static int omap24xxcam_sensor_init(struct omap24xxcam_device *cam) |
| 883 | { |
| 884 | int err = 0; |
| 885 | struct v4l2_int_device *sdev = cam->sdev; |
| 886 | |
| 887 | omap24xxcam_clock_on(cam); |
| 888 | err = omap24xxcam_sensor_if_enable(cam); |
| 889 | if (err) { |
| 890 | dev_err(cam->dev, "sensor interface could not be enabled at " |
| 891 | "initialisation, %d\n", err); |
| 892 | cam->sdev = NULL; |
| 893 | goto out; |
| 894 | } |
| 895 | |
| 896 | /* power up sensor during sensor initialization */ |
| 897 | vidioc_int_s_power(sdev, 1); |
| 898 | |
| 899 | err = vidioc_int_dev_init(sdev); |
| 900 | if (err) { |
| 901 | dev_err(cam->dev, "cannot initialize sensor, error %d\n", err); |
| 902 | /* Sensor init failed --- it's nonexistent to us! */ |
| 903 | cam->sdev = NULL; |
| 904 | goto out; |
| 905 | } |
| 906 | |
| 907 | dev_info(cam->dev, "sensor is %s\n", sdev->name); |
| 908 | |
| 909 | out: |
| 910 | omap24xxcam_sensor_if_disable(cam); |
| 911 | omap24xxcam_clock_off(cam); |
| 912 | |
| 913 | vidioc_int_s_power(sdev, 0); |
| 914 | |
| 915 | return err; |
| 916 | } |
| 917 | |
| 918 | static void omap24xxcam_sensor_exit(struct omap24xxcam_device *cam) |
| 919 | { |
| 920 | if (cam->sdev) |
| 921 | vidioc_int_dev_exit(cam->sdev); |
| 922 | } |
| 923 | |
| 924 | static void omap24xxcam_sensor_disable(struct omap24xxcam_device *cam) |
| 925 | { |
| 926 | omap24xxcam_sensor_if_disable(cam); |
| 927 | omap24xxcam_clock_off(cam); |
| 928 | vidioc_int_s_power(cam->sdev, 0); |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * Power-up and configure camera sensor. It's ready for capturing now. |
| 933 | */ |
| 934 | static int omap24xxcam_sensor_enable(struct omap24xxcam_device *cam) |
| 935 | { |
| 936 | int rval; |
| 937 | |
| 938 | omap24xxcam_clock_on(cam); |
| 939 | |
| 940 | omap24xxcam_sensor_if_enable(cam); |
| 941 | |
| 942 | rval = vidioc_int_s_power(cam->sdev, 1); |
| 943 | if (rval) |
| 944 | goto out; |
| 945 | |
| 946 | rval = vidioc_int_init(cam->sdev); |
| 947 | if (rval) |
| 948 | goto out; |
| 949 | |
| 950 | return 0; |
| 951 | |
| 952 | out: |
| 953 | omap24xxcam_sensor_disable(cam); |
| 954 | |
| 955 | return rval; |
| 956 | } |
| 957 | |
| 958 | static void omap24xxcam_sensor_reset_work(struct work_struct *work) |
| 959 | { |
| 960 | struct omap24xxcam_device *cam = |
| 961 | container_of(work, struct omap24xxcam_device, |
| 962 | sensor_reset_work); |
| 963 | |
| 964 | if (atomic_read(&cam->reset_disable)) |
| 965 | return; |
| 966 | |
| 967 | omap24xxcam_capture_stop(cam); |
| 968 | |
| 969 | if (vidioc_int_reset(cam->sdev) == 0) { |
| 970 | vidioc_int_init(cam->sdev); |
| 971 | } else { |
| 972 | /* Can't reset it by vidioc_int_reset. */ |
| 973 | omap24xxcam_sensor_disable(cam); |
| 974 | omap24xxcam_sensor_enable(cam); |
| 975 | } |
| 976 | |
| 977 | omap24xxcam_capture_cont(cam); |
| 978 | } |
| 979 | |
| 980 | /* |
| 981 | * |
| 982 | * IOCTL interface. |
| 983 | * |
| 984 | */ |
| 985 | |
| 986 | static int vidioc_querycap(struct file *file, void *fh, |
| 987 | struct v4l2_capability *cap) |
| 988 | { |
| 989 | struct omap24xxcam_fh *ofh = fh; |
| 990 | struct omap24xxcam_device *cam = ofh->cam; |
| 991 | |
| 992 | strlcpy(cap->driver, CAM_NAME, sizeof(cap->driver)); |
| 993 | strlcpy(cap->card, cam->vfd->name, sizeof(cap->card)); |
| 994 | cap->version = OMAP24XXCAM_VERSION; |
| 995 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| 996 | |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, |
| 1001 | struct v4l2_fmtdesc *f) |
| 1002 | { |
| 1003 | struct omap24xxcam_fh *ofh = fh; |
| 1004 | struct omap24xxcam_device *cam = ofh->cam; |
| 1005 | int rval; |
| 1006 | |
| 1007 | rval = vidioc_int_enum_fmt_cap(cam->sdev, f); |
| 1008 | |
| 1009 | return rval; |
| 1010 | } |
| 1011 | |
| 1012 | static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, |
| 1013 | struct v4l2_format *f) |
| 1014 | { |
| 1015 | struct omap24xxcam_fh *ofh = fh; |
| 1016 | struct omap24xxcam_device *cam = ofh->cam; |
| 1017 | int rval; |
| 1018 | |
| 1019 | mutex_lock(&cam->mutex); |
| 1020 | rval = vidioc_int_g_fmt_cap(cam->sdev, f); |
| 1021 | mutex_unlock(&cam->mutex); |
| 1022 | |
| 1023 | return rval; |
| 1024 | } |
| 1025 | |
| 1026 | static int vidioc_s_fmt_vid_cap(struct file *file, void *fh, |
| 1027 | struct v4l2_format *f) |
| 1028 | { |
| 1029 | struct omap24xxcam_fh *ofh = fh; |
| 1030 | struct omap24xxcam_device *cam = ofh->cam; |
| 1031 | int rval; |
| 1032 | |
| 1033 | mutex_lock(&cam->mutex); |
| 1034 | if (cam->streaming) { |
| 1035 | rval = -EBUSY; |
| 1036 | goto out; |
| 1037 | } |
| 1038 | |
| 1039 | rval = vidioc_int_s_fmt_cap(cam->sdev, f); |
| 1040 | |
| 1041 | out: |
| 1042 | mutex_unlock(&cam->mutex); |
| 1043 | |
| 1044 | if (!rval) { |
| 1045 | mutex_lock(&ofh->vbq.vb_lock); |
| 1046 | ofh->pix = f->fmt.pix; |
| 1047 | mutex_unlock(&ofh->vbq.vb_lock); |
| 1048 | } |
| 1049 | |
| 1050 | memset(f, 0, sizeof(*f)); |
| 1051 | vidioc_g_fmt_vid_cap(file, fh, f); |
| 1052 | |
| 1053 | return rval; |
| 1054 | } |
| 1055 | |
| 1056 | static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, |
| 1057 | struct v4l2_format *f) |
| 1058 | { |
| 1059 | struct omap24xxcam_fh *ofh = fh; |
| 1060 | struct omap24xxcam_device *cam = ofh->cam; |
| 1061 | int rval; |
| 1062 | |
| 1063 | mutex_lock(&cam->mutex); |
| 1064 | rval = vidioc_int_try_fmt_cap(cam->sdev, f); |
| 1065 | mutex_unlock(&cam->mutex); |
| 1066 | |
| 1067 | return rval; |
| 1068 | } |
| 1069 | |
| 1070 | static int vidioc_reqbufs(struct file *file, void *fh, |
| 1071 | struct v4l2_requestbuffers *b) |
| 1072 | { |
| 1073 | struct omap24xxcam_fh *ofh = fh; |
| 1074 | struct omap24xxcam_device *cam = ofh->cam; |
| 1075 | int rval; |
| 1076 | |
| 1077 | mutex_lock(&cam->mutex); |
| 1078 | if (cam->streaming) { |
| 1079 | mutex_unlock(&cam->mutex); |
| 1080 | return -EBUSY; |
| 1081 | } |
| 1082 | |
| 1083 | omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq); |
| 1084 | mutex_unlock(&cam->mutex); |
| 1085 | |
| 1086 | rval = videobuf_reqbufs(&ofh->vbq, b); |
| 1087 | |
| 1088 | /* |
| 1089 | * Either videobuf_reqbufs failed or the buffers are not |
| 1090 | * memory-mapped (which would need special attention). |
| 1091 | */ |
| 1092 | if (rval < 0 || b->memory != V4L2_MEMORY_MMAP) |
| 1093 | goto out; |
| 1094 | |
| 1095 | rval = omap24xxcam_vbq_alloc_mmap_buffers(&ofh->vbq, rval); |
| 1096 | if (rval) |
| 1097 | omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq); |
| 1098 | |
| 1099 | out: |
| 1100 | return rval; |
| 1101 | } |
| 1102 | |
| 1103 | static int vidioc_querybuf(struct file *file, void *fh, |
| 1104 | struct v4l2_buffer *b) |
| 1105 | { |
| 1106 | struct omap24xxcam_fh *ofh = fh; |
| 1107 | |
| 1108 | return videobuf_querybuf(&ofh->vbq, b); |
| 1109 | } |
| 1110 | |
| 1111 | static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| 1112 | { |
| 1113 | struct omap24xxcam_fh *ofh = fh; |
| 1114 | |
| 1115 | return videobuf_qbuf(&ofh->vbq, b); |
| 1116 | } |
| 1117 | |
| 1118 | static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) |
| 1119 | { |
| 1120 | struct omap24xxcam_fh *ofh = fh; |
| 1121 | struct omap24xxcam_device *cam = ofh->cam; |
| 1122 | struct videobuf_buffer *vb; |
| 1123 | int rval; |
| 1124 | |
| 1125 | videobuf_dqbuf_again: |
| 1126 | rval = videobuf_dqbuf(&ofh->vbq, b, file->f_flags & O_NONBLOCK); |
| 1127 | if (rval) |
| 1128 | goto out; |
| 1129 | |
| 1130 | vb = ofh->vbq.bufs[b->index]; |
| 1131 | |
| 1132 | mutex_lock(&cam->mutex); |
| 1133 | /* _needs_reset returns -EIO if reset is required. */ |
| 1134 | rval = vidioc_int_g_needs_reset(cam->sdev, (void *)vb->baddr); |
| 1135 | mutex_unlock(&cam->mutex); |
| 1136 | if (rval == -EIO) |
| 1137 | schedule_work(&cam->sensor_reset_work); |
| 1138 | else |
| 1139 | rval = 0; |
| 1140 | |
| 1141 | out: |
| 1142 | /* |
| 1143 | * This is a hack. We don't want to show -EIO to the user |
| 1144 | * space. Requeue the buffer and try again if we're not doing |
| 1145 | * this in non-blocking mode. |
| 1146 | */ |
| 1147 | if (rval == -EIO) { |
| 1148 | videobuf_qbuf(&ofh->vbq, b); |
| 1149 | if (!(file->f_flags & O_NONBLOCK)) |
| 1150 | goto videobuf_dqbuf_again; |
| 1151 | /* |
| 1152 | * We don't have a videobuf_buffer now --- maybe next |
| 1153 | * time... |
| 1154 | */ |
| 1155 | rval = -EAGAIN; |
| 1156 | } |
| 1157 | |
| 1158 | return rval; |
| 1159 | } |
| 1160 | |
| 1161 | static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i) |
| 1162 | { |
| 1163 | struct omap24xxcam_fh *ofh = fh; |
| 1164 | struct omap24xxcam_device *cam = ofh->cam; |
| 1165 | int rval; |
| 1166 | |
| 1167 | mutex_lock(&cam->mutex); |
| 1168 | if (cam->streaming) { |
| 1169 | rval = -EBUSY; |
| 1170 | goto out; |
| 1171 | } |
| 1172 | |
| 1173 | rval = omap24xxcam_sensor_if_enable(cam); |
| 1174 | if (rval) { |
| 1175 | dev_dbg(cam->dev, "vidioc_int_g_ifparm failed\n"); |
| 1176 | goto out; |
| 1177 | } |
| 1178 | |
| 1179 | rval = videobuf_streamon(&ofh->vbq); |
| 1180 | if (!rval) { |
| 1181 | cam->streaming = file; |
| 1182 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); |
| 1183 | } |
| 1184 | |
| 1185 | out: |
| 1186 | mutex_unlock(&cam->mutex); |
| 1187 | |
| 1188 | return rval; |
| 1189 | } |
| 1190 | |
| 1191 | static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i) |
| 1192 | { |
| 1193 | struct omap24xxcam_fh *ofh = fh; |
| 1194 | struct omap24xxcam_device *cam = ofh->cam; |
| 1195 | struct videobuf_queue *q = &ofh->vbq; |
| 1196 | int rval; |
| 1197 | |
| 1198 | atomic_inc(&cam->reset_disable); |
| 1199 | |
| 1200 | flush_scheduled_work(); |
| 1201 | |
| 1202 | rval = videobuf_streamoff(q); |
| 1203 | if (!rval) { |
| 1204 | mutex_lock(&cam->mutex); |
| 1205 | cam->streaming = NULL; |
| 1206 | mutex_unlock(&cam->mutex); |
| 1207 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); |
| 1208 | } |
| 1209 | |
| 1210 | atomic_dec(&cam->reset_disable); |
| 1211 | |
| 1212 | return rval; |
| 1213 | } |
| 1214 | |
| 1215 | static int vidioc_enum_input(struct file *file, void *fh, |
| 1216 | struct v4l2_input *inp) |
| 1217 | { |
| 1218 | if (inp->index > 0) |
| 1219 | return -EINVAL; |
| 1220 | |
| 1221 | strlcpy(inp->name, "camera", sizeof(inp->name)); |
| 1222 | inp->type = V4L2_INPUT_TYPE_CAMERA; |
| 1223 | |
| 1224 | return 0; |
| 1225 | } |
| 1226 | |
| 1227 | static int vidioc_g_input(struct file *file, void *fh, unsigned int *i) |
| 1228 | { |
| 1229 | *i = 0; |
| 1230 | |
| 1231 | return 0; |
| 1232 | } |
| 1233 | |
| 1234 | static int vidioc_s_input(struct file *file, void *fh, unsigned int i) |
| 1235 | { |
| 1236 | if (i > 0) |
| 1237 | return -EINVAL; |
| 1238 | |
| 1239 | return 0; |
| 1240 | } |
| 1241 | |
| 1242 | static int vidioc_queryctrl(struct file *file, void *fh, |
| 1243 | struct v4l2_queryctrl *a) |
| 1244 | { |
| 1245 | struct omap24xxcam_fh *ofh = fh; |
| 1246 | struct omap24xxcam_device *cam = ofh->cam; |
| 1247 | int rval; |
| 1248 | |
| 1249 | rval = vidioc_int_queryctrl(cam->sdev, a); |
| 1250 | |
| 1251 | return rval; |
| 1252 | } |
| 1253 | |
| 1254 | static int vidioc_g_ctrl(struct file *file, void *fh, |
| 1255 | struct v4l2_control *a) |
| 1256 | { |
| 1257 | struct omap24xxcam_fh *ofh = fh; |
| 1258 | struct omap24xxcam_device *cam = ofh->cam; |
| 1259 | int rval; |
| 1260 | |
| 1261 | mutex_lock(&cam->mutex); |
| 1262 | rval = vidioc_int_g_ctrl(cam->sdev, a); |
| 1263 | mutex_unlock(&cam->mutex); |
| 1264 | |
| 1265 | return rval; |
| 1266 | } |
| 1267 | |
| 1268 | static int vidioc_s_ctrl(struct file *file, void *fh, |
| 1269 | struct v4l2_control *a) |
| 1270 | { |
| 1271 | struct omap24xxcam_fh *ofh = fh; |
| 1272 | struct omap24xxcam_device *cam = ofh->cam; |
| 1273 | int rval; |
| 1274 | |
| 1275 | mutex_lock(&cam->mutex); |
| 1276 | rval = vidioc_int_s_ctrl(cam->sdev, a); |
| 1277 | mutex_unlock(&cam->mutex); |
| 1278 | |
| 1279 | return rval; |
| 1280 | } |
| 1281 | |
| 1282 | static int vidioc_g_parm(struct file *file, void *fh, |
| 1283 | struct v4l2_streamparm *a) { |
| 1284 | struct omap24xxcam_fh *ofh = fh; |
| 1285 | struct omap24xxcam_device *cam = ofh->cam; |
| 1286 | int rval; |
| 1287 | |
| 1288 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 1289 | return -EINVAL; |
| 1290 | |
| 1291 | mutex_lock(&cam->mutex); |
| 1292 | rval = vidioc_int_g_parm(cam->sdev, a); |
| 1293 | mutex_unlock(&cam->mutex); |
| 1294 | |
| 1295 | return rval; |
| 1296 | } |
| 1297 | |
| 1298 | static int vidioc_s_parm(struct file *file, void *fh, |
| 1299 | struct v4l2_streamparm *a) |
| 1300 | { |
| 1301 | struct omap24xxcam_fh *ofh = fh; |
| 1302 | struct omap24xxcam_device *cam = ofh->cam; |
| 1303 | struct v4l2_streamparm old_streamparm; |
| 1304 | int rval; |
| 1305 | |
| 1306 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 1307 | return -EINVAL; |
| 1308 | |
| 1309 | mutex_lock(&cam->mutex); |
| 1310 | if (cam->streaming) { |
| 1311 | rval = -EBUSY; |
| 1312 | goto out; |
| 1313 | } |
| 1314 | |
| 1315 | old_streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 1316 | rval = vidioc_int_g_parm(cam->sdev, &old_streamparm); |
| 1317 | if (rval) |
| 1318 | goto out; |
| 1319 | |
| 1320 | rval = vidioc_int_s_parm(cam->sdev, a); |
| 1321 | if (rval) |
| 1322 | goto out; |
| 1323 | |
| 1324 | rval = omap24xxcam_sensor_if_enable(cam); |
| 1325 | /* |
| 1326 | * Revert to old streaming parameters if enabling sensor |
| 1327 | * interface with the new ones failed. |
| 1328 | */ |
| 1329 | if (rval) |
| 1330 | vidioc_int_s_parm(cam->sdev, &old_streamparm); |
| 1331 | |
| 1332 | out: |
| 1333 | mutex_unlock(&cam->mutex); |
| 1334 | |
| 1335 | return rval; |
| 1336 | } |
| 1337 | |
| 1338 | /* |
| 1339 | * |
| 1340 | * File operations. |
| 1341 | * |
| 1342 | */ |
| 1343 | |
| 1344 | static unsigned int omap24xxcam_poll(struct file *file, |
| 1345 | struct poll_table_struct *wait) |
| 1346 | { |
| 1347 | struct omap24xxcam_fh *fh = file->private_data; |
| 1348 | struct omap24xxcam_device *cam = fh->cam; |
| 1349 | struct videobuf_buffer *vb; |
| 1350 | |
| 1351 | mutex_lock(&cam->mutex); |
| 1352 | if (cam->streaming != file) { |
| 1353 | mutex_unlock(&cam->mutex); |
| 1354 | return POLLERR; |
| 1355 | } |
| 1356 | mutex_unlock(&cam->mutex); |
| 1357 | |
| 1358 | mutex_lock(&fh->vbq.vb_lock); |
| 1359 | if (list_empty(&fh->vbq.stream)) { |
| 1360 | mutex_unlock(&fh->vbq.vb_lock); |
| 1361 | return POLLERR; |
| 1362 | } |
| 1363 | vb = list_entry(fh->vbq.stream.next, struct videobuf_buffer, stream); |
| 1364 | mutex_unlock(&fh->vbq.vb_lock); |
| 1365 | |
| 1366 | poll_wait(file, &vb->done, wait); |
| 1367 | |
| 1368 | if (vb->state == VIDEOBUF_DONE || vb->state == VIDEOBUF_ERROR) |
| 1369 | return POLLIN | POLLRDNORM; |
| 1370 | |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
| 1374 | static int omap24xxcam_mmap_buffers(struct file *file, |
| 1375 | struct vm_area_struct *vma) |
| 1376 | { |
| 1377 | struct omap24xxcam_fh *fh = file->private_data; |
| 1378 | struct omap24xxcam_device *cam = fh->cam; |
| 1379 | struct videobuf_queue *vbq = &fh->vbq; |
| 1380 | unsigned int first, last, size, i, j; |
| 1381 | int err = 0; |
| 1382 | |
| 1383 | mutex_lock(&cam->mutex); |
| 1384 | if (cam->streaming) { |
| 1385 | mutex_unlock(&cam->mutex); |
| 1386 | return -EBUSY; |
| 1387 | } |
| 1388 | mutex_unlock(&cam->mutex); |
| 1389 | mutex_lock(&vbq->vb_lock); |
| 1390 | |
| 1391 | /* look for first buffer to map */ |
| 1392 | for (first = 0; first < VIDEO_MAX_FRAME; first++) { |
| 1393 | if (NULL == vbq->bufs[first]) |
| 1394 | continue; |
| 1395 | if (V4L2_MEMORY_MMAP != vbq->bufs[first]->memory) |
| 1396 | continue; |
| 1397 | if (vbq->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT)) |
| 1398 | break; |
| 1399 | } |
| 1400 | |
| 1401 | /* look for last buffer to map */ |
| 1402 | for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) { |
| 1403 | if (NULL == vbq->bufs[last]) |
| 1404 | continue; |
| 1405 | if (V4L2_MEMORY_MMAP != vbq->bufs[last]->memory) |
| 1406 | continue; |
| 1407 | size += vbq->bufs[last]->bsize; |
| 1408 | if (size == (vma->vm_end - vma->vm_start)) |
| 1409 | break; |
| 1410 | } |
| 1411 | |
| 1412 | size = 0; |
| 1413 | for (i = first; i <= last; i++) { |
| 1414 | struct videobuf_dmabuf *dma = videobuf_to_dma(vbq->bufs[i]); |
| 1415 | |
| 1416 | for (j = 0; j < dma->sglen; j++) { |
| 1417 | err = remap_pfn_range( |
| 1418 | vma, vma->vm_start + size, |
| 1419 | page_to_pfn(sg_page(&dma->sglist[j])), |
| 1420 | sg_dma_len(&dma->sglist[j]), vma->vm_page_prot); |
| 1421 | if (err) |
| 1422 | goto out; |
| 1423 | size += sg_dma_len(&dma->sglist[j]); |
| 1424 | } |
| 1425 | } |
| 1426 | |
| 1427 | out: |
| 1428 | mutex_unlock(&vbq->vb_lock); |
| 1429 | |
| 1430 | return err; |
| 1431 | } |
| 1432 | |
| 1433 | static int omap24xxcam_mmap(struct file *file, struct vm_area_struct *vma) |
| 1434 | { |
| 1435 | struct omap24xxcam_fh *fh = file->private_data; |
| 1436 | int rval; |
| 1437 | |
| 1438 | /* let the video-buf mapper check arguments and set-up structures */ |
| 1439 | rval = videobuf_mmap_mapper(&fh->vbq, vma); |
| 1440 | if (rval) |
| 1441 | return rval; |
| 1442 | |
| 1443 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 1444 | |
| 1445 | /* do mapping to our allocated buffers */ |
| 1446 | rval = omap24xxcam_mmap_buffers(file, vma); |
| 1447 | /* |
| 1448 | * In case of error, free vma->vm_private_data allocated by |
| 1449 | * videobuf_mmap_mapper. |
| 1450 | */ |
| 1451 | if (rval) |
| 1452 | kfree(vma->vm_private_data); |
| 1453 | |
| 1454 | return rval; |
| 1455 | } |
| 1456 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 1457 | static int omap24xxcam_open(struct file *file) |
Sakari Ailus | 39aee69 | 2008-12-01 15:40:09 -0300 | [diff] [blame] | 1458 | { |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 1459 | int minor = video_devdata(file)->minor; |
Sakari Ailus | 39aee69 | 2008-12-01 15:40:09 -0300 | [diff] [blame] | 1460 | struct omap24xxcam_device *cam = omap24xxcam.priv; |
| 1461 | struct omap24xxcam_fh *fh; |
| 1462 | struct v4l2_format format; |
| 1463 | |
| 1464 | if (!cam || !cam->vfd || (cam->vfd->minor != minor)) |
| 1465 | return -ENODEV; |
| 1466 | |
| 1467 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); |
| 1468 | if (fh == NULL) |
| 1469 | return -ENOMEM; |
| 1470 | |
| 1471 | mutex_lock(&cam->mutex); |
| 1472 | if (cam->sdev == NULL || !try_module_get(cam->sdev->module)) { |
| 1473 | mutex_unlock(&cam->mutex); |
| 1474 | goto out_try_module_get; |
| 1475 | } |
| 1476 | |
| 1477 | if (atomic_inc_return(&cam->users) == 1) { |
| 1478 | omap24xxcam_hwinit(cam); |
| 1479 | if (omap24xxcam_sensor_enable(cam)) { |
| 1480 | mutex_unlock(&cam->mutex); |
| 1481 | goto out_omap24xxcam_sensor_enable; |
| 1482 | } |
| 1483 | } |
| 1484 | mutex_unlock(&cam->mutex); |
| 1485 | |
| 1486 | fh->cam = cam; |
| 1487 | mutex_lock(&cam->mutex); |
| 1488 | vidioc_int_g_fmt_cap(cam->sdev, &format); |
| 1489 | mutex_unlock(&cam->mutex); |
| 1490 | /* FIXME: how about fh->pix when there are more users? */ |
| 1491 | fh->pix = format.fmt.pix; |
| 1492 | |
| 1493 | file->private_data = fh; |
| 1494 | |
| 1495 | spin_lock_init(&fh->vbq_lock); |
| 1496 | |
| 1497 | videobuf_queue_sg_init(&fh->vbq, &omap24xxcam_vbq_ops, NULL, |
| 1498 | &fh->vbq_lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| 1499 | V4L2_FIELD_NONE, |
| 1500 | sizeof(struct videobuf_buffer), fh); |
| 1501 | |
| 1502 | return 0; |
| 1503 | |
| 1504 | out_omap24xxcam_sensor_enable: |
| 1505 | omap24xxcam_poweron_reset(cam); |
| 1506 | module_put(cam->sdev->module); |
| 1507 | |
| 1508 | out_try_module_get: |
| 1509 | kfree(fh); |
| 1510 | |
| 1511 | return -ENODEV; |
| 1512 | } |
| 1513 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 1514 | static int omap24xxcam_release(struct file *file) |
Sakari Ailus | 39aee69 | 2008-12-01 15:40:09 -0300 | [diff] [blame] | 1515 | { |
| 1516 | struct omap24xxcam_fh *fh = file->private_data; |
| 1517 | struct omap24xxcam_device *cam = fh->cam; |
| 1518 | |
| 1519 | atomic_inc(&cam->reset_disable); |
| 1520 | |
| 1521 | flush_scheduled_work(); |
| 1522 | |
| 1523 | /* stop streaming capture */ |
| 1524 | videobuf_streamoff(&fh->vbq); |
| 1525 | |
| 1526 | mutex_lock(&cam->mutex); |
| 1527 | if (cam->streaming == file) { |
| 1528 | cam->streaming = NULL; |
| 1529 | mutex_unlock(&cam->mutex); |
| 1530 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); |
| 1531 | } else { |
| 1532 | mutex_unlock(&cam->mutex); |
| 1533 | } |
| 1534 | |
| 1535 | atomic_dec(&cam->reset_disable); |
| 1536 | |
| 1537 | omap24xxcam_vbq_free_mmap_buffers(&fh->vbq); |
| 1538 | |
| 1539 | /* |
| 1540 | * Make sure the reset work we might have scheduled is not |
| 1541 | * pending! It may be run *only* if we have users. (And it may |
| 1542 | * not be scheduled anymore since streaming is already |
| 1543 | * disabled.) |
| 1544 | */ |
| 1545 | flush_scheduled_work(); |
| 1546 | |
| 1547 | mutex_lock(&cam->mutex); |
| 1548 | if (atomic_dec_return(&cam->users) == 0) { |
| 1549 | omap24xxcam_sensor_disable(cam); |
| 1550 | omap24xxcam_poweron_reset(cam); |
| 1551 | } |
| 1552 | mutex_unlock(&cam->mutex); |
| 1553 | |
| 1554 | file->private_data = NULL; |
| 1555 | |
| 1556 | module_put(cam->sdev->module); |
| 1557 | kfree(fh); |
| 1558 | |
| 1559 | return 0; |
| 1560 | } |
| 1561 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 1562 | static struct v4l2_file_operations omap24xxcam_fops = { |
Sakari Ailus | 39aee69 | 2008-12-01 15:40:09 -0300 | [diff] [blame] | 1563 | .ioctl = video_ioctl2, |
| 1564 | .poll = omap24xxcam_poll, |
| 1565 | .mmap = omap24xxcam_mmap, |
| 1566 | .open = omap24xxcam_open, |
| 1567 | .release = omap24xxcam_release, |
| 1568 | }; |
| 1569 | |
| 1570 | /* |
| 1571 | * |
| 1572 | * Power management. |
| 1573 | * |
| 1574 | */ |
| 1575 | |
| 1576 | #ifdef CONFIG_PM |
| 1577 | static int omap24xxcam_suspend(struct platform_device *pdev, pm_message_t state) |
| 1578 | { |
| 1579 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); |
| 1580 | |
| 1581 | if (atomic_read(&cam->users) == 0) |
| 1582 | return 0; |
| 1583 | |
| 1584 | if (!atomic_read(&cam->reset_disable)) |
| 1585 | omap24xxcam_capture_stop(cam); |
| 1586 | |
| 1587 | omap24xxcam_sensor_disable(cam); |
| 1588 | omap24xxcam_poweron_reset(cam); |
| 1589 | |
| 1590 | return 0; |
| 1591 | } |
| 1592 | |
| 1593 | static int omap24xxcam_resume(struct platform_device *pdev) |
| 1594 | { |
| 1595 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); |
| 1596 | |
| 1597 | if (atomic_read(&cam->users) == 0) |
| 1598 | return 0; |
| 1599 | |
| 1600 | omap24xxcam_hwinit(cam); |
| 1601 | omap24xxcam_sensor_enable(cam); |
| 1602 | |
| 1603 | if (!atomic_read(&cam->reset_disable)) |
| 1604 | omap24xxcam_capture_cont(cam); |
| 1605 | |
| 1606 | return 0; |
| 1607 | } |
| 1608 | #endif /* CONFIG_PM */ |
| 1609 | |
| 1610 | static const struct v4l2_ioctl_ops omap24xxcam_ioctl_fops = { |
| 1611 | .vidioc_querycap = vidioc_querycap, |
| 1612 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
| 1613 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
| 1614 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
| 1615 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
| 1616 | .vidioc_reqbufs = vidioc_reqbufs, |
| 1617 | .vidioc_querybuf = vidioc_querybuf, |
| 1618 | .vidioc_qbuf = vidioc_qbuf, |
| 1619 | .vidioc_dqbuf = vidioc_dqbuf, |
| 1620 | .vidioc_streamon = vidioc_streamon, |
| 1621 | .vidioc_streamoff = vidioc_streamoff, |
| 1622 | .vidioc_enum_input = vidioc_enum_input, |
| 1623 | .vidioc_g_input = vidioc_g_input, |
| 1624 | .vidioc_s_input = vidioc_s_input, |
| 1625 | .vidioc_queryctrl = vidioc_queryctrl, |
| 1626 | .vidioc_g_ctrl = vidioc_g_ctrl, |
| 1627 | .vidioc_s_ctrl = vidioc_s_ctrl, |
| 1628 | .vidioc_g_parm = vidioc_g_parm, |
| 1629 | .vidioc_s_parm = vidioc_s_parm, |
| 1630 | }; |
| 1631 | |
| 1632 | /* |
| 1633 | * |
| 1634 | * Camera device (i.e. /dev/video). |
| 1635 | * |
| 1636 | */ |
| 1637 | |
| 1638 | static int omap24xxcam_device_register(struct v4l2_int_device *s) |
| 1639 | { |
| 1640 | struct omap24xxcam_device *cam = s->u.slave->master->priv; |
| 1641 | struct video_device *vfd; |
| 1642 | int rval; |
| 1643 | |
| 1644 | /* We already have a slave. */ |
| 1645 | if (cam->sdev) |
| 1646 | return -EBUSY; |
| 1647 | |
| 1648 | cam->sdev = s; |
| 1649 | |
| 1650 | if (device_create_file(cam->dev, &dev_attr_streaming) != 0) { |
| 1651 | dev_err(cam->dev, "could not register sysfs entry\n"); |
| 1652 | rval = -EBUSY; |
| 1653 | goto err; |
| 1654 | } |
| 1655 | |
| 1656 | /* initialize the video_device struct */ |
| 1657 | vfd = cam->vfd = video_device_alloc(); |
| 1658 | if (!vfd) { |
| 1659 | dev_err(cam->dev, "could not allocate video device struct\n"); |
| 1660 | rval = -ENOMEM; |
| 1661 | goto err; |
| 1662 | } |
| 1663 | vfd->release = video_device_release; |
| 1664 | |
| 1665 | vfd->parent = cam->dev; |
| 1666 | |
| 1667 | strlcpy(vfd->name, CAM_NAME, sizeof(vfd->name)); |
| 1668 | vfd->vfl_type = VID_TYPE_CAPTURE | VID_TYPE_CHROMAKEY; |
| 1669 | vfd->fops = &omap24xxcam_fops; |
| 1670 | vfd->minor = -1; |
| 1671 | vfd->ioctl_ops = &omap24xxcam_ioctl_fops; |
| 1672 | |
| 1673 | omap24xxcam_hwinit(cam); |
| 1674 | |
| 1675 | rval = omap24xxcam_sensor_init(cam); |
| 1676 | if (rval) |
| 1677 | goto err; |
| 1678 | |
| 1679 | if (video_register_device(vfd, VFL_TYPE_GRABBER, video_nr) < 0) { |
| 1680 | dev_err(cam->dev, "could not register V4L device\n"); |
| 1681 | vfd->minor = -1; |
| 1682 | rval = -EBUSY; |
| 1683 | goto err; |
| 1684 | } |
| 1685 | |
| 1686 | omap24xxcam_poweron_reset(cam); |
| 1687 | |
| 1688 | dev_info(cam->dev, "registered device video%d\n", vfd->minor); |
| 1689 | |
| 1690 | return 0; |
| 1691 | |
| 1692 | err: |
| 1693 | omap24xxcam_device_unregister(s); |
| 1694 | |
| 1695 | return rval; |
| 1696 | } |
| 1697 | |
| 1698 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s) |
| 1699 | { |
| 1700 | struct omap24xxcam_device *cam = s->u.slave->master->priv; |
| 1701 | |
| 1702 | omap24xxcam_sensor_exit(cam); |
| 1703 | |
| 1704 | if (cam->vfd) { |
| 1705 | if (cam->vfd->minor == -1) { |
| 1706 | /* |
| 1707 | * The device was never registered, so release the |
| 1708 | * video_device struct directly. |
| 1709 | */ |
| 1710 | video_device_release(cam->vfd); |
| 1711 | } else { |
| 1712 | /* |
| 1713 | * The unregister function will release the |
| 1714 | * video_device struct as well as |
| 1715 | * unregistering it. |
| 1716 | */ |
| 1717 | video_unregister_device(cam->vfd); |
| 1718 | } |
| 1719 | cam->vfd = NULL; |
| 1720 | } |
| 1721 | |
| 1722 | device_remove_file(cam->dev, &dev_attr_streaming); |
| 1723 | |
| 1724 | cam->sdev = NULL; |
| 1725 | } |
| 1726 | |
| 1727 | static struct v4l2_int_master omap24xxcam_master = { |
| 1728 | .attach = omap24xxcam_device_register, |
| 1729 | .detach = omap24xxcam_device_unregister, |
| 1730 | }; |
| 1731 | |
| 1732 | static struct v4l2_int_device omap24xxcam = { |
| 1733 | .module = THIS_MODULE, |
| 1734 | .name = CAM_NAME, |
| 1735 | .type = v4l2_int_type_master, |
| 1736 | .u = { |
| 1737 | .master = &omap24xxcam_master |
| 1738 | }, |
| 1739 | }; |
| 1740 | |
| 1741 | /* |
| 1742 | * |
| 1743 | * Driver initialisation and deinitialisation. |
| 1744 | * |
| 1745 | */ |
| 1746 | |
| 1747 | static int __init omap24xxcam_probe(struct platform_device *pdev) |
| 1748 | { |
| 1749 | struct omap24xxcam_device *cam; |
| 1750 | struct resource *mem; |
| 1751 | int irq; |
| 1752 | |
| 1753 | cam = kzalloc(sizeof(*cam), GFP_KERNEL); |
| 1754 | if (!cam) { |
| 1755 | dev_err(&pdev->dev, "could not allocate memory\n"); |
| 1756 | goto err; |
| 1757 | } |
| 1758 | |
| 1759 | platform_set_drvdata(pdev, cam); |
| 1760 | |
| 1761 | cam->dev = &pdev->dev; |
| 1762 | |
| 1763 | /* |
| 1764 | * Impose a lower limit on the amount of memory allocated for |
| 1765 | * capture. We require at least enough memory to double-buffer |
| 1766 | * QVGA (300KB). |
| 1767 | */ |
| 1768 | if (capture_mem < 320 * 240 * 2 * 2) |
| 1769 | capture_mem = 320 * 240 * 2 * 2; |
| 1770 | cam->capture_mem = capture_mem; |
| 1771 | |
| 1772 | /* request the mem region for the camera registers */ |
| 1773 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1774 | if (!mem) { |
| 1775 | dev_err(cam->dev, "no mem resource?\n"); |
| 1776 | goto err; |
| 1777 | } |
| 1778 | if (!request_mem_region(mem->start, (mem->end - mem->start) + 1, |
| 1779 | pdev->name)) { |
| 1780 | dev_err(cam->dev, |
| 1781 | "cannot reserve camera register I/O region\n"); |
| 1782 | goto err; |
| 1783 | } |
| 1784 | cam->mmio_base_phys = mem->start; |
| 1785 | cam->mmio_size = (mem->end - mem->start) + 1; |
| 1786 | |
| 1787 | /* map the region */ |
| 1788 | cam->mmio_base = (unsigned long) |
| 1789 | ioremap_nocache(cam->mmio_base_phys, cam->mmio_size); |
| 1790 | if (!cam->mmio_base) { |
| 1791 | dev_err(cam->dev, "cannot map camera register I/O region\n"); |
| 1792 | goto err; |
| 1793 | } |
| 1794 | |
| 1795 | irq = platform_get_irq(pdev, 0); |
| 1796 | if (irq <= 0) { |
| 1797 | dev_err(cam->dev, "no irq for camera?\n"); |
| 1798 | goto err; |
| 1799 | } |
| 1800 | |
| 1801 | /* install the interrupt service routine */ |
| 1802 | if (request_irq(irq, omap24xxcam_isr, 0, CAM_NAME, cam)) { |
| 1803 | dev_err(cam->dev, |
| 1804 | "could not install interrupt service routine\n"); |
| 1805 | goto err; |
| 1806 | } |
| 1807 | cam->irq = irq; |
| 1808 | |
| 1809 | if (omap24xxcam_clock_get(cam)) |
| 1810 | goto err; |
| 1811 | |
| 1812 | INIT_WORK(&cam->sensor_reset_work, omap24xxcam_sensor_reset_work); |
| 1813 | |
| 1814 | mutex_init(&cam->mutex); |
| 1815 | spin_lock_init(&cam->core_enable_disable_lock); |
| 1816 | |
| 1817 | omap24xxcam_sgdma_init(&cam->sgdma, |
| 1818 | cam->mmio_base + CAMDMA_REG_OFFSET, |
| 1819 | omap24xxcam_stalled_dma_reset, |
| 1820 | (unsigned long)cam); |
| 1821 | |
| 1822 | omap24xxcam.priv = cam; |
| 1823 | |
| 1824 | if (v4l2_int_device_register(&omap24xxcam)) |
| 1825 | goto err; |
| 1826 | |
| 1827 | return 0; |
| 1828 | |
| 1829 | err: |
| 1830 | omap24xxcam_remove(pdev); |
| 1831 | return -ENODEV; |
| 1832 | } |
| 1833 | |
| 1834 | static int omap24xxcam_remove(struct platform_device *pdev) |
| 1835 | { |
| 1836 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); |
| 1837 | |
| 1838 | if (!cam) |
| 1839 | return 0; |
| 1840 | |
| 1841 | if (omap24xxcam.priv != NULL) |
| 1842 | v4l2_int_device_unregister(&omap24xxcam); |
| 1843 | omap24xxcam.priv = NULL; |
| 1844 | |
| 1845 | omap24xxcam_clock_put(cam); |
| 1846 | |
| 1847 | if (cam->irq) { |
| 1848 | free_irq(cam->irq, cam); |
| 1849 | cam->irq = 0; |
| 1850 | } |
| 1851 | |
| 1852 | if (cam->mmio_base) { |
| 1853 | iounmap((void *)cam->mmio_base); |
| 1854 | cam->mmio_base = 0; |
| 1855 | } |
| 1856 | |
| 1857 | if (cam->mmio_base_phys) { |
| 1858 | release_mem_region(cam->mmio_base_phys, cam->mmio_size); |
| 1859 | cam->mmio_base_phys = 0; |
| 1860 | } |
| 1861 | |
| 1862 | kfree(cam); |
| 1863 | |
| 1864 | return 0; |
| 1865 | } |
| 1866 | |
| 1867 | static struct platform_driver omap24xxcam_driver = { |
| 1868 | .probe = omap24xxcam_probe, |
| 1869 | .remove = omap24xxcam_remove, |
| 1870 | #ifdef CONFIG_PM |
| 1871 | .suspend = omap24xxcam_suspend, |
| 1872 | .resume = omap24xxcam_resume, |
| 1873 | #endif |
| 1874 | .driver = { |
| 1875 | .name = CAM_NAME, |
| 1876 | .owner = THIS_MODULE, |
| 1877 | }, |
| 1878 | }; |
| 1879 | |
| 1880 | /* |
| 1881 | * |
| 1882 | * Module initialisation and deinitialisation |
| 1883 | * |
| 1884 | */ |
| 1885 | |
| 1886 | static int __init omap24xxcam_init(void) |
| 1887 | { |
| 1888 | return platform_driver_register(&omap24xxcam_driver); |
| 1889 | } |
| 1890 | |
| 1891 | static void __exit omap24xxcam_cleanup(void) |
| 1892 | { |
| 1893 | platform_driver_unregister(&omap24xxcam_driver); |
| 1894 | } |
| 1895 | |
| 1896 | MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>"); |
| 1897 | MODULE_DESCRIPTION("OMAP24xx Video for Linux camera driver"); |
| 1898 | MODULE_LICENSE("GPL"); |
| 1899 | module_param(video_nr, int, 0); |
| 1900 | MODULE_PARM_DESC(video_nr, |
| 1901 | "Minor number for video device (-1 ==> auto assign)"); |
| 1902 | module_param(capture_mem, int, 0); |
| 1903 | MODULE_PARM_DESC(capture_mem, "Maximum amount of memory for capture " |
| 1904 | "buffers (default 4800kiB)"); |
| 1905 | |
| 1906 | module_init(omap24xxcam_init); |
| 1907 | module_exit(omap24xxcam_cleanup); |