| 1 | /* |
| 2 | * V4L2 Driver for SuperH Mobile CEU interface |
| 3 | * |
| 4 | * Copyright (C) 2008 Magnus Damm |
| 5 | * |
| 6 | * Based on V4L2 Driver for PXA camera host - "pxa_camera.c", |
| 7 | * |
| 8 | * Copyright (C) 2006, Sascha Hauer, Pengutronix |
| 9 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/io.h> |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/dma-mapping.h> |
| 22 | #include <linux/errno.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/mm.h> |
| 27 | #include <linux/moduleparam.h> |
| 28 | #include <linux/time.h> |
| 29 | #include <linux/version.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/device.h> |
| 32 | #include <linux/platform_device.h> |
| 33 | #include <linux/videodev2.h> |
| 34 | #include <linux/pm_runtime.h> |
| 35 | #include <linux/sched.h> |
| 36 | |
| 37 | #include <media/v4l2-common.h> |
| 38 | #include <media/v4l2-dev.h> |
| 39 | #include <media/soc_camera.h> |
| 40 | #include <media/sh_mobile_ceu.h> |
| 41 | #include <media/videobuf-dma-contig.h> |
| 42 | #include <media/v4l2-mediabus.h> |
| 43 | #include <media/soc_mediabus.h> |
| 44 | |
| 45 | /* register offsets for sh7722 / sh7723 */ |
| 46 | |
| 47 | #define CAPSR 0x00 /* Capture start register */ |
| 48 | #define CAPCR 0x04 /* Capture control register */ |
| 49 | #define CAMCR 0x08 /* Capture interface control register */ |
| 50 | #define CMCYR 0x0c /* Capture interface cycle register */ |
| 51 | #define CAMOR 0x10 /* Capture interface offset register */ |
| 52 | #define CAPWR 0x14 /* Capture interface width register */ |
| 53 | #define CAIFR 0x18 /* Capture interface input format register */ |
| 54 | #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */ |
| 55 | #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */ |
| 56 | #define CRCNTR 0x28 /* CEU register control register */ |
| 57 | #define CRCMPR 0x2c /* CEU register forcible control register */ |
| 58 | #define CFLCR 0x30 /* Capture filter control register */ |
| 59 | #define CFSZR 0x34 /* Capture filter size clip register */ |
| 60 | #define CDWDR 0x38 /* Capture destination width register */ |
| 61 | #define CDAYR 0x3c /* Capture data address Y register */ |
| 62 | #define CDACR 0x40 /* Capture data address C register */ |
| 63 | #define CDBYR 0x44 /* Capture data bottom-field address Y register */ |
| 64 | #define CDBCR 0x48 /* Capture data bottom-field address C register */ |
| 65 | #define CBDSR 0x4c /* Capture bundle destination size register */ |
| 66 | #define CFWCR 0x5c /* Firewall operation control register */ |
| 67 | #define CLFCR 0x60 /* Capture low-pass filter control register */ |
| 68 | #define CDOCR 0x64 /* Capture data output control register */ |
| 69 | #define CDDCR 0x68 /* Capture data complexity level register */ |
| 70 | #define CDDAR 0x6c /* Capture data complexity level address register */ |
| 71 | #define CEIER 0x70 /* Capture event interrupt enable register */ |
| 72 | #define CETCR 0x74 /* Capture event flag clear register */ |
| 73 | #define CSTSR 0x7c /* Capture status register */ |
| 74 | #define CSRTR 0x80 /* Capture software reset register */ |
| 75 | #define CDSSR 0x84 /* Capture data size register */ |
| 76 | #define CDAYR2 0x90 /* Capture data address Y register 2 */ |
| 77 | #define CDACR2 0x94 /* Capture data address C register 2 */ |
| 78 | #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */ |
| 79 | #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */ |
| 80 | |
| 81 | #undef DEBUG_GEOMETRY |
| 82 | #ifdef DEBUG_GEOMETRY |
| 83 | #define dev_geo dev_info |
| 84 | #else |
| 85 | #define dev_geo dev_dbg |
| 86 | #endif |
| 87 | |
| 88 | /* per video frame buffer */ |
| 89 | struct sh_mobile_ceu_buffer { |
| 90 | struct videobuf_buffer vb; /* v4l buffer must be first */ |
| 91 | enum v4l2_mbus_pixelcode code; |
| 92 | }; |
| 93 | |
| 94 | struct sh_mobile_ceu_dev { |
| 95 | struct soc_camera_host ici; |
| 96 | struct soc_camera_device *icd; |
| 97 | |
| 98 | unsigned int irq; |
| 99 | void __iomem *base; |
| 100 | unsigned long video_limit; |
| 101 | |
| 102 | /* lock used to protect videobuf */ |
| 103 | spinlock_t lock; |
| 104 | struct list_head capture; |
| 105 | struct videobuf_buffer *active; |
| 106 | |
| 107 | struct sh_mobile_ceu_info *pdata; |
| 108 | |
| 109 | u32 cflcr; |
| 110 | |
| 111 | enum v4l2_field field; |
| 112 | |
| 113 | unsigned int image_mode:1; |
| 114 | unsigned int is_16bit:1; |
| 115 | }; |
| 116 | |
| 117 | struct sh_mobile_ceu_cam { |
| 118 | /* CEU offsets within scaled by the CEU camera output */ |
| 119 | unsigned int ceu_left; |
| 120 | unsigned int ceu_top; |
| 121 | /* Client output, as seen by the CEU */ |
| 122 | unsigned int width; |
| 123 | unsigned int height; |
| 124 | /* |
| 125 | * User window from S_CROP / G_CROP, produced by client cropping and |
| 126 | * scaling, CEU scaling and CEU cropping, mapped back onto the client |
| 127 | * input window |
| 128 | */ |
| 129 | struct v4l2_rect subrect; |
| 130 | /* Camera cropping rectangle */ |
| 131 | struct v4l2_rect rect; |
| 132 | const struct soc_mbus_pixelfmt *extra_fmt; |
| 133 | enum v4l2_mbus_pixelcode code; |
| 134 | }; |
| 135 | |
| 136 | static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev) |
| 137 | { |
| 138 | unsigned long flags; |
| 139 | |
| 140 | flags = SOCAM_MASTER | |
| 141 | SOCAM_PCLK_SAMPLE_RISING | |
| 142 | SOCAM_HSYNC_ACTIVE_HIGH | |
| 143 | SOCAM_HSYNC_ACTIVE_LOW | |
| 144 | SOCAM_VSYNC_ACTIVE_HIGH | |
| 145 | SOCAM_VSYNC_ACTIVE_LOW | |
| 146 | SOCAM_DATA_ACTIVE_HIGH; |
| 147 | |
| 148 | if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS) |
| 149 | flags |= SOCAM_DATAWIDTH_8; |
| 150 | |
| 151 | if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS) |
| 152 | flags |= SOCAM_DATAWIDTH_16; |
| 153 | |
| 154 | if (flags & SOCAM_DATAWIDTH_MASK) |
| 155 | return flags; |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static void ceu_write(struct sh_mobile_ceu_dev *priv, |
| 161 | unsigned long reg_offs, u32 data) |
| 162 | { |
| 163 | iowrite32(data, priv->base + reg_offs); |
| 164 | } |
| 165 | |
| 166 | static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs) |
| 167 | { |
| 168 | return ioread32(priv->base + reg_offs); |
| 169 | } |
| 170 | |
| 171 | static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev) |
| 172 | { |
| 173 | int i, success = 0; |
| 174 | struct soc_camera_device *icd = pcdev->icd; |
| 175 | |
| 176 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
| 177 | |
| 178 | /* wait CSTSR.CPTON bit */ |
| 179 | for (i = 0; i < 1000; i++) { |
| 180 | if (!(ceu_read(pcdev, CSTSR) & 1)) { |
| 181 | success++; |
| 182 | break; |
| 183 | } |
| 184 | udelay(1); |
| 185 | } |
| 186 | |
| 187 | /* wait CAPSR.CPKIL bit */ |
| 188 | for (i = 0; i < 1000; i++) { |
| 189 | if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) { |
| 190 | success++; |
| 191 | break; |
| 192 | } |
| 193 | udelay(1); |
| 194 | } |
| 195 | |
| 196 | |
| 197 | if (2 != success) { |
| 198 | dev_warn(&icd->dev, "soft reset time out\n"); |
| 199 | return -EIO; |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Videobuf operations |
| 207 | */ |
| 208 | static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq, |
| 209 | unsigned int *count, |
| 210 | unsigned int *size) |
| 211 | { |
| 212 | struct soc_camera_device *icd = vq->priv_data; |
| 213 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 214 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 215 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| 216 | icd->current_fmt->host_fmt); |
| 217 | |
| 218 | if (bytes_per_line < 0) |
| 219 | return bytes_per_line; |
| 220 | |
| 221 | *size = bytes_per_line * icd->user_height; |
| 222 | |
| 223 | if (0 == *count) |
| 224 | *count = 2; |
| 225 | |
| 226 | if (pcdev->video_limit) { |
| 227 | if (PAGE_ALIGN(*size) * *count > pcdev->video_limit) |
| 228 | *count = pcdev->video_limit / PAGE_ALIGN(*size); |
| 229 | } |
| 230 | |
| 231 | dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size); |
| 232 | |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | static void free_buffer(struct videobuf_queue *vq, |
| 237 | struct sh_mobile_ceu_buffer *buf) |
| 238 | { |
| 239 | struct soc_camera_device *icd = vq->priv_data; |
| 240 | struct device *dev = icd->dev.parent; |
| 241 | |
| 242 | dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
| 243 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
| 244 | |
| 245 | if (in_interrupt()) |
| 246 | BUG(); |
| 247 | |
| 248 | videobuf_waiton(&buf->vb, 0, 0); |
| 249 | videobuf_dma_contig_free(vq, &buf->vb); |
| 250 | dev_dbg(dev, "%s freed\n", __func__); |
| 251 | buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| 252 | } |
| 253 | |
| 254 | #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */ |
| 255 | #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */ |
| 256 | #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */ |
| 257 | #define CEU_CEIER_VBP (1 << 20) /* vbp error */ |
| 258 | #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */ |
| 259 | #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP) |
| 260 | |
| 261 | |
| 262 | /* |
| 263 | * return value doesn't reflex the success/failure to queue the new buffer, |
| 264 | * but rather the status of the previous buffer. |
| 265 | */ |
| 266 | static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) |
| 267 | { |
| 268 | struct soc_camera_device *icd = pcdev->icd; |
| 269 | dma_addr_t phys_addr_top, phys_addr_bottom; |
| 270 | unsigned long top1, top2; |
| 271 | unsigned long bottom1, bottom2; |
| 272 | u32 status; |
| 273 | int ret = 0; |
| 274 | |
| 275 | /* |
| 276 | * The hardware is _very_ picky about this sequence. Especially |
| 277 | * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge |
| 278 | * several not-so-well documented interrupt sources in CETCR. |
| 279 | */ |
| 280 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK); |
| 281 | status = ceu_read(pcdev, CETCR); |
| 282 | ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC); |
| 283 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK); |
| 284 | ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP); |
| 285 | ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW); |
| 286 | |
| 287 | /* |
| 288 | * When a VBP interrupt occurs, a capture end interrupt does not occur |
| 289 | * and the image of that frame is not captured correctly. So, soft reset |
| 290 | * is needed here. |
| 291 | */ |
| 292 | if (status & CEU_CEIER_VBP) { |
| 293 | sh_mobile_ceu_soft_reset(pcdev); |
| 294 | ret = -EIO; |
| 295 | } |
| 296 | |
| 297 | if (!pcdev->active) |
| 298 | return ret; |
| 299 | |
| 300 | if (V4L2_FIELD_INTERLACED_BT == pcdev->field) { |
| 301 | top1 = CDBYR; |
| 302 | top2 = CDBCR; |
| 303 | bottom1 = CDAYR; |
| 304 | bottom2 = CDACR; |
| 305 | } else { |
| 306 | top1 = CDAYR; |
| 307 | top2 = CDACR; |
| 308 | bottom1 = CDBYR; |
| 309 | bottom2 = CDBCR; |
| 310 | } |
| 311 | |
| 312 | phys_addr_top = videobuf_to_dma_contig(pcdev->active); |
| 313 | ceu_write(pcdev, top1, phys_addr_top); |
| 314 | if (V4L2_FIELD_NONE != pcdev->field) { |
| 315 | phys_addr_bottom = phys_addr_top + icd->user_width; |
| 316 | ceu_write(pcdev, bottom1, phys_addr_bottom); |
| 317 | } |
| 318 | |
| 319 | switch (icd->current_fmt->host_fmt->fourcc) { |
| 320 | case V4L2_PIX_FMT_NV12: |
| 321 | case V4L2_PIX_FMT_NV21: |
| 322 | case V4L2_PIX_FMT_NV16: |
| 323 | case V4L2_PIX_FMT_NV61: |
| 324 | phys_addr_top += icd->user_width * |
| 325 | icd->user_height; |
| 326 | ceu_write(pcdev, top2, phys_addr_top); |
| 327 | if (V4L2_FIELD_NONE != pcdev->field) { |
| 328 | phys_addr_bottom = phys_addr_top + icd->user_width; |
| 329 | ceu_write(pcdev, bottom2, phys_addr_bottom); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | pcdev->active->state = VIDEOBUF_ACTIVE; |
| 334 | ceu_write(pcdev, CAPSR, 0x1); /* start capture */ |
| 335 | |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq, |
| 340 | struct videobuf_buffer *vb, |
| 341 | enum v4l2_field field) |
| 342 | { |
| 343 | struct soc_camera_device *icd = vq->priv_data; |
| 344 | struct sh_mobile_ceu_buffer *buf; |
| 345 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| 346 | icd->current_fmt->host_fmt); |
| 347 | int ret; |
| 348 | |
| 349 | if (bytes_per_line < 0) |
| 350 | return bytes_per_line; |
| 351 | |
| 352 | buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); |
| 353 | |
| 354 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
| 355 | vb, vb->baddr, vb->bsize); |
| 356 | |
| 357 | /* Added list head initialization on alloc */ |
| 358 | WARN_ON(!list_empty(&vb->queue)); |
| 359 | |
| 360 | #ifdef DEBUG |
| 361 | /* |
| 362 | * This can be useful if you want to see if we actually fill |
| 363 | * the buffer with something |
| 364 | */ |
| 365 | memset((void *)vb->baddr, 0xaa, vb->bsize); |
| 366 | #endif |
| 367 | |
| 368 | BUG_ON(NULL == icd->current_fmt); |
| 369 | |
| 370 | if (buf->code != icd->current_fmt->code || |
| 371 | vb->width != icd->user_width || |
| 372 | vb->height != icd->user_height || |
| 373 | vb->field != field) { |
| 374 | buf->code = icd->current_fmt->code; |
| 375 | vb->width = icd->user_width; |
| 376 | vb->height = icd->user_height; |
| 377 | vb->field = field; |
| 378 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 379 | } |
| 380 | |
| 381 | vb->size = vb->height * bytes_per_line; |
| 382 | if (0 != vb->baddr && vb->bsize < vb->size) { |
| 383 | ret = -EINVAL; |
| 384 | goto out; |
| 385 | } |
| 386 | |
| 387 | if (vb->state == VIDEOBUF_NEEDS_INIT) { |
| 388 | ret = videobuf_iolock(vq, vb, NULL); |
| 389 | if (ret) |
| 390 | goto fail; |
| 391 | vb->state = VIDEOBUF_PREPARED; |
| 392 | } |
| 393 | |
| 394 | return 0; |
| 395 | fail: |
| 396 | free_buffer(vq, buf); |
| 397 | out: |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | /* Called under spinlock_irqsave(&pcdev->lock, ...) */ |
| 402 | static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, |
| 403 | struct videobuf_buffer *vb) |
| 404 | { |
| 405 | struct soc_camera_device *icd = vq->priv_data; |
| 406 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 407 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 408 | |
| 409 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
| 410 | vb, vb->baddr, vb->bsize); |
| 411 | |
| 412 | vb->state = VIDEOBUF_QUEUED; |
| 413 | list_add_tail(&vb->queue, &pcdev->capture); |
| 414 | |
| 415 | if (!pcdev->active) { |
| 416 | /* |
| 417 | * Because there were no active buffer at this moment, |
| 418 | * we are not interested in the return value of |
| 419 | * sh_mobile_ceu_capture here. |
| 420 | */ |
| 421 | pcdev->active = vb; |
| 422 | sh_mobile_ceu_capture(pcdev); |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, |
| 427 | struct videobuf_buffer *vb) |
| 428 | { |
| 429 | struct soc_camera_device *icd = vq->priv_data; |
| 430 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 431 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 432 | unsigned long flags; |
| 433 | |
| 434 | spin_lock_irqsave(&pcdev->lock, flags); |
| 435 | |
| 436 | if (pcdev->active == vb) { |
| 437 | /* disable capture (release DMA buffer), reset */ |
| 438 | ceu_write(pcdev, CAPSR, 1 << 16); |
| 439 | pcdev->active = NULL; |
| 440 | } |
| 441 | |
| 442 | if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) && |
| 443 | !list_empty(&vb->queue)) { |
| 444 | vb->state = VIDEOBUF_ERROR; |
| 445 | list_del_init(&vb->queue); |
| 446 | } |
| 447 | |
| 448 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 449 | |
| 450 | free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb)); |
| 451 | } |
| 452 | |
| 453 | static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = { |
| 454 | .buf_setup = sh_mobile_ceu_videobuf_setup, |
| 455 | .buf_prepare = sh_mobile_ceu_videobuf_prepare, |
| 456 | .buf_queue = sh_mobile_ceu_videobuf_queue, |
| 457 | .buf_release = sh_mobile_ceu_videobuf_release, |
| 458 | }; |
| 459 | |
| 460 | static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) |
| 461 | { |
| 462 | struct sh_mobile_ceu_dev *pcdev = data; |
| 463 | struct videobuf_buffer *vb; |
| 464 | unsigned long flags; |
| 465 | |
| 466 | spin_lock_irqsave(&pcdev->lock, flags); |
| 467 | |
| 468 | vb = pcdev->active; |
| 469 | if (!vb) |
| 470 | /* Stale interrupt from a released buffer */ |
| 471 | goto out; |
| 472 | |
| 473 | list_del_init(&vb->queue); |
| 474 | |
| 475 | if (!list_empty(&pcdev->capture)) |
| 476 | pcdev->active = list_entry(pcdev->capture.next, |
| 477 | struct videobuf_buffer, queue); |
| 478 | else |
| 479 | pcdev->active = NULL; |
| 480 | |
| 481 | vb->state = (sh_mobile_ceu_capture(pcdev) < 0) ? |
| 482 | VIDEOBUF_ERROR : VIDEOBUF_DONE; |
| 483 | do_gettimeofday(&vb->ts); |
| 484 | vb->field_count++; |
| 485 | wake_up(&vb->done); |
| 486 | |
| 487 | out: |
| 488 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 489 | |
| 490 | return IRQ_HANDLED; |
| 491 | } |
| 492 | |
| 493 | /* Called with .video_lock held */ |
| 494 | static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) |
| 495 | { |
| 496 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 497 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 498 | int ret; |
| 499 | |
| 500 | if (pcdev->icd) |
| 501 | return -EBUSY; |
| 502 | |
| 503 | dev_info(icd->dev.parent, |
| 504 | "SuperH Mobile CEU driver attached to camera %d\n", |
| 505 | icd->devnum); |
| 506 | |
| 507 | pm_runtime_get_sync(ici->v4l2_dev.dev); |
| 508 | |
| 509 | ret = sh_mobile_ceu_soft_reset(pcdev); |
| 510 | if (!ret) |
| 511 | pcdev->icd = icd; |
| 512 | |
| 513 | return ret; |
| 514 | } |
| 515 | |
| 516 | /* Called with .video_lock held */ |
| 517 | static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) |
| 518 | { |
| 519 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 520 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 521 | unsigned long flags; |
| 522 | |
| 523 | BUG_ON(icd != pcdev->icd); |
| 524 | |
| 525 | /* disable capture, disable interrupts */ |
| 526 | ceu_write(pcdev, CEIER, 0); |
| 527 | sh_mobile_ceu_soft_reset(pcdev); |
| 528 | |
| 529 | /* make sure active buffer is canceled */ |
| 530 | spin_lock_irqsave(&pcdev->lock, flags); |
| 531 | if (pcdev->active) { |
| 532 | list_del(&pcdev->active->queue); |
| 533 | pcdev->active->state = VIDEOBUF_ERROR; |
| 534 | wake_up_all(&pcdev->active->done); |
| 535 | pcdev->active = NULL; |
| 536 | } |
| 537 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 538 | |
| 539 | pm_runtime_put_sync(ici->v4l2_dev.dev); |
| 540 | |
| 541 | dev_info(icd->dev.parent, |
| 542 | "SuperH Mobile CEU driver detached from camera %d\n", |
| 543 | icd->devnum); |
| 544 | |
| 545 | pcdev->icd = NULL; |
| 546 | } |
| 547 | |
| 548 | /* |
| 549 | * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)" |
| 550 | * in SH7722 Hardware Manual |
| 551 | */ |
| 552 | static unsigned int size_dst(unsigned int src, unsigned int scale) |
| 553 | { |
| 554 | unsigned int mant_pre = scale >> 12; |
| 555 | if (!src || !scale) |
| 556 | return src; |
| 557 | return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) * |
| 558 | mant_pre * 4096 / scale + 1; |
| 559 | } |
| 560 | |
| 561 | static u16 calc_scale(unsigned int src, unsigned int *dst) |
| 562 | { |
| 563 | u16 scale; |
| 564 | |
| 565 | if (src == *dst) |
| 566 | return 0; |
| 567 | |
| 568 | scale = (src * 4096 / *dst) & ~7; |
| 569 | |
| 570 | while (scale > 4096 && size_dst(src, scale) < *dst) |
| 571 | scale -= 8; |
| 572 | |
| 573 | *dst = size_dst(src, scale); |
| 574 | |
| 575 | return scale; |
| 576 | } |
| 577 | |
| 578 | /* rect is guaranteed to not exceed the scaled camera rectangle */ |
| 579 | static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd) |
| 580 | { |
| 581 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 582 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 583 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 584 | unsigned int height, width, cdwdr_width, in_width, in_height; |
| 585 | unsigned int left_offset, top_offset; |
| 586 | u32 camor; |
| 587 | |
| 588 | dev_geo(icd->dev.parent, "Crop %ux%u@%u:%u\n", |
| 589 | icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top); |
| 590 | |
| 591 | left_offset = cam->ceu_left; |
| 592 | top_offset = cam->ceu_top; |
| 593 | |
| 594 | /* CEU cropping (CFSZR) is applied _after_ the scaling filter (CFLCR) */ |
| 595 | if (pcdev->image_mode) { |
| 596 | in_width = cam->width; |
| 597 | if (!pcdev->is_16bit) { |
| 598 | in_width *= 2; |
| 599 | left_offset *= 2; |
| 600 | } |
| 601 | width = icd->user_width; |
| 602 | cdwdr_width = icd->user_width; |
| 603 | } else { |
| 604 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| 605 | icd->current_fmt->host_fmt); |
| 606 | unsigned int w_factor; |
| 607 | |
| 608 | width = icd->user_width; |
| 609 | |
| 610 | switch (icd->current_fmt->host_fmt->packing) { |
| 611 | case SOC_MBUS_PACKING_2X8_PADHI: |
| 612 | w_factor = 2; |
| 613 | break; |
| 614 | default: |
| 615 | w_factor = 1; |
| 616 | } |
| 617 | |
| 618 | in_width = cam->width * w_factor; |
| 619 | left_offset = left_offset * w_factor; |
| 620 | |
| 621 | if (bytes_per_line < 0) |
| 622 | cdwdr_width = icd->user_width; |
| 623 | else |
| 624 | cdwdr_width = bytes_per_line; |
| 625 | } |
| 626 | |
| 627 | height = icd->user_height; |
| 628 | in_height = cam->height; |
| 629 | if (V4L2_FIELD_NONE != pcdev->field) { |
| 630 | height /= 2; |
| 631 | in_height /= 2; |
| 632 | top_offset /= 2; |
| 633 | cdwdr_width *= 2; |
| 634 | } |
| 635 | |
| 636 | /* CSI2 special configuration */ |
| 637 | if (pcdev->pdata->csi2_dev) { |
| 638 | in_width = ((in_width - 2) * 2); |
| 639 | left_offset *= 2; |
| 640 | } |
| 641 | |
| 642 | /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */ |
| 643 | camor = left_offset | (top_offset << 16); |
| 644 | |
| 645 | dev_geo(icd->dev.parent, |
| 646 | "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor, |
| 647 | (in_height << 16) | in_width, (height << 16) | width, |
| 648 | cdwdr_width); |
| 649 | |
| 650 | ceu_write(pcdev, CAMOR, camor); |
| 651 | ceu_write(pcdev, CAPWR, (in_height << 16) | in_width); |
| 652 | ceu_write(pcdev, CFSZR, (height << 16) | width); |
| 653 | ceu_write(pcdev, CDWDR, cdwdr_width); |
| 654 | } |
| 655 | |
| 656 | static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev) |
| 657 | { |
| 658 | u32 capsr = ceu_read(pcdev, CAPSR); |
| 659 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */ |
| 660 | return capsr; |
| 661 | } |
| 662 | |
| 663 | static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr) |
| 664 | { |
| 665 | unsigned long timeout = jiffies + 10 * HZ; |
| 666 | |
| 667 | /* |
| 668 | * Wait until the end of the current frame. It can take a long time, |
| 669 | * but if it has been aborted by a CAPSR reset, it shoule exit sooner. |
| 670 | */ |
| 671 | while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout)) |
| 672 | msleep(1); |
| 673 | |
| 674 | if (time_after(jiffies, timeout)) { |
| 675 | dev_err(pcdev->ici.v4l2_dev.dev, |
| 676 | "Timeout waiting for frame end! Interface problem?\n"); |
| 677 | return; |
| 678 | } |
| 679 | |
| 680 | /* Wait until reset clears, this shall not hang... */ |
| 681 | while (ceu_read(pcdev, CAPSR) & (1 << 16)) |
| 682 | udelay(10); |
| 683 | |
| 684 | /* Anything to restore? */ |
| 685 | if (capsr & ~(1 << 16)) |
| 686 | ceu_write(pcdev, CAPSR, capsr); |
| 687 | } |
| 688 | |
| 689 | static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, |
| 690 | __u32 pixfmt) |
| 691 | { |
| 692 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 693 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 694 | int ret; |
| 695 | unsigned long camera_flags, common_flags, value; |
| 696 | int yuv_lineskip; |
| 697 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 698 | u32 capsr = capture_save_reset(pcdev); |
| 699 | |
| 700 | camera_flags = icd->ops->query_bus_param(icd); |
| 701 | common_flags = soc_camera_bus_param_compatible(camera_flags, |
| 702 | make_bus_param(pcdev)); |
| 703 | if (!common_flags) |
| 704 | return -EINVAL; |
| 705 | |
| 706 | /* Make choises, based on platform preferences */ |
| 707 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && |
| 708 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { |
| 709 | if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW) |
| 710 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; |
| 711 | else |
| 712 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; |
| 713 | } |
| 714 | |
| 715 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && |
| 716 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { |
| 717 | if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW) |
| 718 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; |
| 719 | else |
| 720 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; |
| 721 | } |
| 722 | |
| 723 | ret = icd->ops->set_bus_param(icd, common_flags); |
| 724 | if (ret < 0) |
| 725 | return ret; |
| 726 | |
| 727 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { |
| 728 | case SOCAM_DATAWIDTH_8: |
| 729 | pcdev->is_16bit = 0; |
| 730 | break; |
| 731 | case SOCAM_DATAWIDTH_16: |
| 732 | pcdev->is_16bit = 1; |
| 733 | break; |
| 734 | default: |
| 735 | return -EINVAL; |
| 736 | } |
| 737 | |
| 738 | ceu_write(pcdev, CRCNTR, 0); |
| 739 | ceu_write(pcdev, CRCMPR, 0); |
| 740 | |
| 741 | value = 0x00000010; /* data fetch by default */ |
| 742 | yuv_lineskip = 0; |
| 743 | |
| 744 | switch (icd->current_fmt->host_fmt->fourcc) { |
| 745 | case V4L2_PIX_FMT_NV12: |
| 746 | case V4L2_PIX_FMT_NV21: |
| 747 | yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */ |
| 748 | /* fall-through */ |
| 749 | case V4L2_PIX_FMT_NV16: |
| 750 | case V4L2_PIX_FMT_NV61: |
| 751 | switch (cam->code) { |
| 752 | case V4L2_MBUS_FMT_UYVY8_2X8: |
| 753 | value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */ |
| 754 | break; |
| 755 | case V4L2_MBUS_FMT_VYUY8_2X8: |
| 756 | value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */ |
| 757 | break; |
| 758 | case V4L2_MBUS_FMT_YUYV8_2X8: |
| 759 | value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */ |
| 760 | break; |
| 761 | case V4L2_MBUS_FMT_YVYU8_2X8: |
| 762 | value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */ |
| 763 | break; |
| 764 | default: |
| 765 | BUG(); |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 || |
| 770 | icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61) |
| 771 | value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */ |
| 772 | |
| 773 | value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0; |
| 774 | value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0; |
| 775 | value |= pcdev->is_16bit ? 1 << 12 : 0; |
| 776 | |
| 777 | /* CSI2 mode */ |
| 778 | if (pcdev->pdata->csi2_dev) |
| 779 | value |= 3 << 12; |
| 780 | |
| 781 | ceu_write(pcdev, CAMCR, value); |
| 782 | |
| 783 | ceu_write(pcdev, CAPCR, 0x00300000); |
| 784 | |
| 785 | switch (pcdev->field) { |
| 786 | case V4L2_FIELD_INTERLACED_TB: |
| 787 | value = 0x101; |
| 788 | break; |
| 789 | case V4L2_FIELD_INTERLACED_BT: |
| 790 | value = 0x102; |
| 791 | break; |
| 792 | default: |
| 793 | value = 0; |
| 794 | break; |
| 795 | } |
| 796 | ceu_write(pcdev, CAIFR, value); |
| 797 | |
| 798 | sh_mobile_ceu_set_rect(icd); |
| 799 | mdelay(1); |
| 800 | |
| 801 | dev_geo(icd->dev.parent, "CFLCR 0x%x\n", pcdev->cflcr); |
| 802 | ceu_write(pcdev, CFLCR, pcdev->cflcr); |
| 803 | |
| 804 | /* |
| 805 | * A few words about byte order (observed in Big Endian mode) |
| 806 | * |
| 807 | * In data fetch mode bytes are received in chunks of 8 bytes. |
| 808 | * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) |
| 809 | * |
| 810 | * The data is however by default written to memory in reverse order: |
| 811 | * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) |
| 812 | * |
| 813 | * The lowest three bits of CDOCR allows us to do swapping, |
| 814 | * using 7 we swap the data bytes to match the incoming order: |
| 815 | * D0, D1, D2, D3, D4, D5, D6, D7 |
| 816 | */ |
| 817 | value = 0x00000017; |
| 818 | if (yuv_lineskip) |
| 819 | value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */ |
| 820 | |
| 821 | ceu_write(pcdev, CDOCR, value); |
| 822 | ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ |
| 823 | |
| 824 | dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u\n", |
| 825 | pixfmt & 0xff, (pixfmt >> 8) & 0xff, |
| 826 | (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff, |
| 827 | icd->user_width, icd->user_height); |
| 828 | |
| 829 | capture_restore(pcdev, capsr); |
| 830 | |
| 831 | /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ |
| 832 | return 0; |
| 833 | } |
| 834 | |
| 835 | static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd, |
| 836 | unsigned char buswidth) |
| 837 | { |
| 838 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 839 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 840 | unsigned long camera_flags, common_flags; |
| 841 | |
| 842 | camera_flags = icd->ops->query_bus_param(icd); |
| 843 | common_flags = soc_camera_bus_param_compatible(camera_flags, |
| 844 | make_bus_param(pcdev)); |
| 845 | if (!common_flags || buswidth > 16 || |
| 846 | (buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_16))) |
| 847 | return -EINVAL; |
| 848 | |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = { |
| 853 | { |
| 854 | .fourcc = V4L2_PIX_FMT_NV12, |
| 855 | .name = "NV12", |
| 856 | .bits_per_sample = 12, |
| 857 | .packing = SOC_MBUS_PACKING_NONE, |
| 858 | .order = SOC_MBUS_ORDER_LE, |
| 859 | }, { |
| 860 | .fourcc = V4L2_PIX_FMT_NV21, |
| 861 | .name = "NV21", |
| 862 | .bits_per_sample = 12, |
| 863 | .packing = SOC_MBUS_PACKING_NONE, |
| 864 | .order = SOC_MBUS_ORDER_LE, |
| 865 | }, { |
| 866 | .fourcc = V4L2_PIX_FMT_NV16, |
| 867 | .name = "NV16", |
| 868 | .bits_per_sample = 16, |
| 869 | .packing = SOC_MBUS_PACKING_NONE, |
| 870 | .order = SOC_MBUS_ORDER_LE, |
| 871 | }, { |
| 872 | .fourcc = V4L2_PIX_FMT_NV61, |
| 873 | .name = "NV61", |
| 874 | .bits_per_sample = 16, |
| 875 | .packing = SOC_MBUS_PACKING_NONE, |
| 876 | .order = SOC_MBUS_ORDER_LE, |
| 877 | }, |
| 878 | }; |
| 879 | |
| 880 | /* This will be corrected as we get more formats */ |
| 881 | static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt) |
| 882 | { |
| 883 | return fmt->packing == SOC_MBUS_PACKING_NONE || |
| 884 | (fmt->bits_per_sample == 8 && |
| 885 | fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || |
| 886 | (fmt->bits_per_sample > 8 && |
| 887 | fmt->packing == SOC_MBUS_PACKING_EXTEND16); |
| 888 | } |
| 889 | |
| 890 | static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect); |
| 891 | |
| 892 | static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx, |
| 893 | struct soc_camera_format_xlate *xlate) |
| 894 | { |
| 895 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 896 | struct device *dev = icd->dev.parent; |
| 897 | struct soc_camera_host *ici = to_soc_camera_host(dev); |
| 898 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 899 | int ret, k, n; |
| 900 | int formats = 0; |
| 901 | struct sh_mobile_ceu_cam *cam; |
| 902 | enum v4l2_mbus_pixelcode code; |
| 903 | const struct soc_mbus_pixelfmt *fmt; |
| 904 | |
| 905 | ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code); |
| 906 | if (ret < 0) |
| 907 | /* No more formats */ |
| 908 | return 0; |
| 909 | |
| 910 | fmt = soc_mbus_get_fmtdesc(code); |
| 911 | if (!fmt) { |
| 912 | dev_err(dev, "Invalid format code #%u: %d\n", idx, code); |
| 913 | return -EINVAL; |
| 914 | } |
| 915 | |
| 916 | if (!pcdev->pdata->csi2_dev) { |
| 917 | ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample); |
| 918 | if (ret < 0) |
| 919 | return 0; |
| 920 | } |
| 921 | |
| 922 | if (!icd->host_priv) { |
| 923 | struct v4l2_mbus_framefmt mf; |
| 924 | struct v4l2_rect rect; |
| 925 | int shift = 0; |
| 926 | |
| 927 | /* FIXME: subwindow is lost between close / open */ |
| 928 | |
| 929 | /* Cache current client geometry */ |
| 930 | ret = client_g_rect(sd, &rect); |
| 931 | if (ret < 0) |
| 932 | return ret; |
| 933 | |
| 934 | /* First time */ |
| 935 | ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); |
| 936 | if (ret < 0) |
| 937 | return ret; |
| 938 | |
| 939 | while ((mf.width > 2560 || mf.height > 1920) && shift < 4) { |
| 940 | /* Try 2560x1920, 1280x960, 640x480, 320x240 */ |
| 941 | mf.width = 2560 >> shift; |
| 942 | mf.height = 1920 >> shift; |
| 943 | ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, |
| 944 | s_mbus_fmt, &mf); |
| 945 | if (ret < 0) |
| 946 | return ret; |
| 947 | shift++; |
| 948 | } |
| 949 | |
| 950 | if (shift == 4) { |
| 951 | dev_err(dev, "Failed to configure the client below %ux%x\n", |
| 952 | mf.width, mf.height); |
| 953 | return -EIO; |
| 954 | } |
| 955 | |
| 956 | dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height); |
| 957 | |
| 958 | cam = kzalloc(sizeof(*cam), GFP_KERNEL); |
| 959 | if (!cam) |
| 960 | return -ENOMEM; |
| 961 | |
| 962 | /* We are called with current camera crop, initialise subrect with it */ |
| 963 | cam->rect = rect; |
| 964 | cam->subrect = rect; |
| 965 | |
| 966 | cam->width = mf.width; |
| 967 | cam->height = mf.height; |
| 968 | |
| 969 | cam->width = mf.width; |
| 970 | cam->height = mf.height; |
| 971 | |
| 972 | icd->host_priv = cam; |
| 973 | } else { |
| 974 | cam = icd->host_priv; |
| 975 | } |
| 976 | |
| 977 | /* Beginning of a pass */ |
| 978 | if (!idx) |
| 979 | cam->extra_fmt = NULL; |
| 980 | |
| 981 | switch (code) { |
| 982 | case V4L2_MBUS_FMT_UYVY8_2X8: |
| 983 | case V4L2_MBUS_FMT_VYUY8_2X8: |
| 984 | case V4L2_MBUS_FMT_YUYV8_2X8: |
| 985 | case V4L2_MBUS_FMT_YVYU8_2X8: |
| 986 | if (cam->extra_fmt) |
| 987 | break; |
| 988 | |
| 989 | /* |
| 990 | * Our case is simple so far: for any of the above four camera |
| 991 | * formats we add all our four synthesized NV* formats, so, |
| 992 | * just marking the device with a single flag suffices. If |
| 993 | * the format generation rules are more complex, you would have |
| 994 | * to actually hang your already added / counted formats onto |
| 995 | * the host_priv pointer and check whether the format you're |
| 996 | * going to add now is already there. |
| 997 | */ |
| 998 | cam->extra_fmt = sh_mobile_ceu_formats; |
| 999 | |
| 1000 | n = ARRAY_SIZE(sh_mobile_ceu_formats); |
| 1001 | formats += n; |
| 1002 | for (k = 0; xlate && k < n; k++) { |
| 1003 | xlate->host_fmt = &sh_mobile_ceu_formats[k]; |
| 1004 | xlate->code = code; |
| 1005 | xlate++; |
| 1006 | dev_dbg(dev, "Providing format %s using code %d\n", |
| 1007 | sh_mobile_ceu_formats[k].name, code); |
| 1008 | } |
| 1009 | break; |
| 1010 | default: |
| 1011 | if (!sh_mobile_ceu_packing_supported(fmt)) |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | /* Generic pass-through */ |
| 1016 | formats++; |
| 1017 | if (xlate) { |
| 1018 | xlate->host_fmt = fmt; |
| 1019 | xlate->code = code; |
| 1020 | xlate++; |
| 1021 | dev_dbg(dev, "Providing format %s in pass-through mode\n", |
| 1022 | fmt->name); |
| 1023 | } |
| 1024 | |
| 1025 | return formats; |
| 1026 | } |
| 1027 | |
| 1028 | static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd) |
| 1029 | { |
| 1030 | kfree(icd->host_priv); |
| 1031 | icd->host_priv = NULL; |
| 1032 | } |
| 1033 | |
| 1034 | /* Check if any dimension of r1 is smaller than respective one of r2 */ |
| 1035 | static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2) |
| 1036 | { |
| 1037 | return r1->width < r2->width || r1->height < r2->height; |
| 1038 | } |
| 1039 | |
| 1040 | /* Check if r1 fails to cover r2 */ |
| 1041 | static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2) |
| 1042 | { |
| 1043 | return r1->left > r2->left || r1->top > r2->top || |
| 1044 | r1->left + r1->width < r2->left + r2->width || |
| 1045 | r1->top + r1->height < r2->top + r2->height; |
| 1046 | } |
| 1047 | |
| 1048 | static unsigned int scale_down(unsigned int size, unsigned int scale) |
| 1049 | { |
| 1050 | return (size * 4096 + scale / 2) / scale; |
| 1051 | } |
| 1052 | |
| 1053 | static unsigned int calc_generic_scale(unsigned int input, unsigned int output) |
| 1054 | { |
| 1055 | return (input * 4096 + output / 2) / output; |
| 1056 | } |
| 1057 | |
| 1058 | /* Get and store current client crop */ |
| 1059 | static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect) |
| 1060 | { |
| 1061 | struct v4l2_crop crop; |
| 1062 | struct v4l2_cropcap cap; |
| 1063 | int ret; |
| 1064 | |
| 1065 | crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 1066 | |
| 1067 | ret = v4l2_subdev_call(sd, video, g_crop, &crop); |
| 1068 | if (!ret) { |
| 1069 | *rect = crop.c; |
| 1070 | return ret; |
| 1071 | } |
| 1072 | |
| 1073 | /* Camera driver doesn't support .g_crop(), assume default rectangle */ |
| 1074 | cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 1075 | |
| 1076 | ret = v4l2_subdev_call(sd, video, cropcap, &cap); |
| 1077 | if (!ret) |
| 1078 | *rect = cap.defrect; |
| 1079 | |
| 1080 | return ret; |
| 1081 | } |
| 1082 | |
| 1083 | /* Client crop has changed, update our sub-rectangle to remain within the area */ |
| 1084 | static void update_subrect(struct sh_mobile_ceu_cam *cam) |
| 1085 | { |
| 1086 | struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect; |
| 1087 | |
| 1088 | if (rect->width < subrect->width) |
| 1089 | subrect->width = rect->width; |
| 1090 | |
| 1091 | if (rect->height < subrect->height) |
| 1092 | subrect->height = rect->height; |
| 1093 | |
| 1094 | if (rect->left > subrect->left) |
| 1095 | subrect->left = rect->left; |
| 1096 | else if (rect->left + rect->width > |
| 1097 | subrect->left + subrect->width) |
| 1098 | subrect->left = rect->left + rect->width - |
| 1099 | subrect->width; |
| 1100 | |
| 1101 | if (rect->top > subrect->top) |
| 1102 | subrect->top = rect->top; |
| 1103 | else if (rect->top + rect->height > |
| 1104 | subrect->top + subrect->height) |
| 1105 | subrect->top = rect->top + rect->height - |
| 1106 | subrect->height; |
| 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | * The common for both scaling and cropping iterative approach is: |
| 1111 | * 1. try if the client can produce exactly what requested by the user |
| 1112 | * 2. if (1) failed, try to double the client image until we get one big enough |
| 1113 | * 3. if (2) failed, try to request the maximum image |
| 1114 | */ |
| 1115 | static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop, |
| 1116 | struct v4l2_crop *cam_crop) |
| 1117 | { |
| 1118 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1119 | struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c; |
| 1120 | struct device *dev = sd->v4l2_dev->dev; |
| 1121 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1122 | struct v4l2_cropcap cap; |
| 1123 | int ret; |
| 1124 | unsigned int width, height; |
| 1125 | |
| 1126 | v4l2_subdev_call(sd, video, s_crop, crop); |
| 1127 | ret = client_g_rect(sd, cam_rect); |
| 1128 | if (ret < 0) |
| 1129 | return ret; |
| 1130 | |
| 1131 | /* |
| 1132 | * Now cam_crop contains the current camera input rectangle, and it must |
| 1133 | * be within camera cropcap bounds |
| 1134 | */ |
| 1135 | if (!memcmp(rect, cam_rect, sizeof(*rect))) { |
| 1136 | /* Even if camera S_CROP failed, but camera rectangle matches */ |
| 1137 | dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n", |
| 1138 | rect->width, rect->height, rect->left, rect->top); |
| 1139 | cam->rect = *cam_rect; |
| 1140 | return 0; |
| 1141 | } |
| 1142 | |
| 1143 | /* Try to fix cropping, that camera hasn't managed to set */ |
| 1144 | dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n", |
| 1145 | cam_rect->width, cam_rect->height, |
| 1146 | cam_rect->left, cam_rect->top, |
| 1147 | rect->width, rect->height, rect->left, rect->top); |
| 1148 | |
| 1149 | /* We need sensor maximum rectangle */ |
| 1150 | ret = v4l2_subdev_call(sd, video, cropcap, &cap); |
| 1151 | if (ret < 0) |
| 1152 | return ret; |
| 1153 | |
| 1154 | /* Put user requested rectangle within sensor bounds */ |
| 1155 | soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2, |
| 1156 | cap.bounds.width); |
| 1157 | soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4, |
| 1158 | cap.bounds.height); |
| 1159 | |
| 1160 | /* |
| 1161 | * Popular special case - some cameras can only handle fixed sizes like |
| 1162 | * QVGA, VGA,... Take care to avoid infinite loop. |
| 1163 | */ |
| 1164 | width = max(cam_rect->width, 2); |
| 1165 | height = max(cam_rect->height, 2); |
| 1166 | |
| 1167 | /* |
| 1168 | * Loop as long as sensor is not covering the requested rectangle and |
| 1169 | * is still within its bounds |
| 1170 | */ |
| 1171 | while (!ret && (is_smaller(cam_rect, rect) || |
| 1172 | is_inside(cam_rect, rect)) && |
| 1173 | (cap.bounds.width > width || cap.bounds.height > height)) { |
| 1174 | |
| 1175 | width *= 2; |
| 1176 | height *= 2; |
| 1177 | |
| 1178 | cam_rect->width = width; |
| 1179 | cam_rect->height = height; |
| 1180 | |
| 1181 | /* |
| 1182 | * We do not know what capabilities the camera has to set up |
| 1183 | * left and top borders. We could try to be smarter in iterating |
| 1184 | * them, e.g., if camera current left is to the right of the |
| 1185 | * target left, set it to the middle point between the current |
| 1186 | * left and minimum left. But that would add too much |
| 1187 | * complexity: we would have to iterate each border separately. |
| 1188 | * Instead we just drop to the left and top bounds. |
| 1189 | */ |
| 1190 | if (cam_rect->left > rect->left) |
| 1191 | cam_rect->left = cap.bounds.left; |
| 1192 | |
| 1193 | if (cam_rect->left + cam_rect->width < rect->left + rect->width) |
| 1194 | cam_rect->width = rect->left + rect->width - |
| 1195 | cam_rect->left; |
| 1196 | |
| 1197 | if (cam_rect->top > rect->top) |
| 1198 | cam_rect->top = cap.bounds.top; |
| 1199 | |
| 1200 | if (cam_rect->top + cam_rect->height < rect->top + rect->height) |
| 1201 | cam_rect->height = rect->top + rect->height - |
| 1202 | cam_rect->top; |
| 1203 | |
| 1204 | v4l2_subdev_call(sd, video, s_crop, cam_crop); |
| 1205 | ret = client_g_rect(sd, cam_rect); |
| 1206 | dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret, |
| 1207 | cam_rect->width, cam_rect->height, |
| 1208 | cam_rect->left, cam_rect->top); |
| 1209 | } |
| 1210 | |
| 1211 | /* S_CROP must not modify the rectangle */ |
| 1212 | if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) { |
| 1213 | /* |
| 1214 | * The camera failed to configure a suitable cropping, |
| 1215 | * we cannot use the current rectangle, set to max |
| 1216 | */ |
| 1217 | *cam_rect = cap.bounds; |
| 1218 | v4l2_subdev_call(sd, video, s_crop, cam_crop); |
| 1219 | ret = client_g_rect(sd, cam_rect); |
| 1220 | dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret, |
| 1221 | cam_rect->width, cam_rect->height, |
| 1222 | cam_rect->left, cam_rect->top); |
| 1223 | } |
| 1224 | |
| 1225 | if (!ret) { |
| 1226 | cam->rect = *cam_rect; |
| 1227 | update_subrect(cam); |
| 1228 | } |
| 1229 | |
| 1230 | return ret; |
| 1231 | } |
| 1232 | |
| 1233 | /* Iterative s_mbus_fmt, also updates cached client crop on success */ |
| 1234 | static int client_s_fmt(struct soc_camera_device *icd, |
| 1235 | struct v4l2_mbus_framefmt *mf, bool ceu_can_scale) |
| 1236 | { |
| 1237 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1238 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1239 | struct device *dev = icd->dev.parent; |
| 1240 | unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h; |
| 1241 | unsigned int max_width, max_height; |
| 1242 | struct v4l2_cropcap cap; |
| 1243 | int ret; |
| 1244 | |
| 1245 | ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, |
| 1246 | s_mbus_fmt, mf); |
| 1247 | if (ret < 0) |
| 1248 | return ret; |
| 1249 | |
| 1250 | dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height); |
| 1251 | |
| 1252 | if ((width == mf->width && height == mf->height) || !ceu_can_scale) |
| 1253 | goto update_cache; |
| 1254 | |
| 1255 | cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 1256 | |
| 1257 | ret = v4l2_subdev_call(sd, video, cropcap, &cap); |
| 1258 | if (ret < 0) |
| 1259 | return ret; |
| 1260 | |
| 1261 | max_width = min(cap.bounds.width, 2560); |
| 1262 | max_height = min(cap.bounds.height, 1920); |
| 1263 | |
| 1264 | /* Camera set a format, but geometry is not precise, try to improve */ |
| 1265 | tmp_w = mf->width; |
| 1266 | tmp_h = mf->height; |
| 1267 | |
| 1268 | /* width <= max_width && height <= max_height - guaranteed by try_fmt */ |
| 1269 | while ((width > tmp_w || height > tmp_h) && |
| 1270 | tmp_w < max_width && tmp_h < max_height) { |
| 1271 | tmp_w = min(2 * tmp_w, max_width); |
| 1272 | tmp_h = min(2 * tmp_h, max_height); |
| 1273 | mf->width = tmp_w; |
| 1274 | mf->height = tmp_h; |
| 1275 | ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, |
| 1276 | s_mbus_fmt, mf); |
| 1277 | dev_geo(dev, "Camera scaled to %ux%u\n", |
| 1278 | mf->width, mf->height); |
| 1279 | if (ret < 0) { |
| 1280 | /* This shouldn't happen */ |
| 1281 | dev_err(dev, "Client failed to set format: %d\n", ret); |
| 1282 | return ret; |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | update_cache: |
| 1287 | /* Update cache */ |
| 1288 | ret = client_g_rect(sd, &cam->rect); |
| 1289 | if (ret < 0) |
| 1290 | return ret; |
| 1291 | |
| 1292 | update_subrect(cam); |
| 1293 | |
| 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | /** |
| 1298 | * @width - on output: user width, mapped back to input |
| 1299 | * @height - on output: user height, mapped back to input |
| 1300 | * @mf - in- / output camera output window |
| 1301 | */ |
| 1302 | static int client_scale(struct soc_camera_device *icd, |
| 1303 | struct v4l2_mbus_framefmt *mf, |
| 1304 | unsigned int *width, unsigned int *height, |
| 1305 | bool ceu_can_scale) |
| 1306 | { |
| 1307 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1308 | struct device *dev = icd->dev.parent; |
| 1309 | struct v4l2_mbus_framefmt mf_tmp = *mf; |
| 1310 | unsigned int scale_h, scale_v; |
| 1311 | int ret; |
| 1312 | |
| 1313 | /* |
| 1314 | * 5. Apply iterative camera S_FMT for camera user window (also updates |
| 1315 | * client crop cache and the imaginary sub-rectangle). |
| 1316 | */ |
| 1317 | ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale); |
| 1318 | if (ret < 0) |
| 1319 | return ret; |
| 1320 | |
| 1321 | dev_geo(dev, "5: camera scaled to %ux%u\n", |
| 1322 | mf_tmp.width, mf_tmp.height); |
| 1323 | |
| 1324 | /* 6. Retrieve camera output window (g_fmt) */ |
| 1325 | |
| 1326 | /* unneeded - it is already in "mf_tmp" */ |
| 1327 | |
| 1328 | /* 7. Calculate new client scales. */ |
| 1329 | scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width); |
| 1330 | scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height); |
| 1331 | |
| 1332 | mf->width = mf_tmp.width; |
| 1333 | mf->height = mf_tmp.height; |
| 1334 | mf->colorspace = mf_tmp.colorspace; |
| 1335 | |
| 1336 | /* |
| 1337 | * 8. Calculate new CEU crop - apply camera scales to previously |
| 1338 | * updated "effective" crop. |
| 1339 | */ |
| 1340 | *width = scale_down(cam->subrect.width, scale_h); |
| 1341 | *height = scale_down(cam->subrect.height, scale_v); |
| 1342 | |
| 1343 | dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height); |
| 1344 | |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | /* |
| 1349 | * CEU can scale and crop, but we don't want to waste bandwidth and kill the |
| 1350 | * framerate by always requesting the maximum image from the client. See |
| 1351 | * Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of |
| 1352 | * scaling and cropping algorithms and for the meaning of referenced here steps. |
| 1353 | */ |
| 1354 | static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd, |
| 1355 | struct v4l2_crop *a) |
| 1356 | { |
| 1357 | struct v4l2_rect *rect = &a->c; |
| 1358 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1359 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 1360 | struct v4l2_crop cam_crop; |
| 1361 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1362 | struct v4l2_rect *cam_rect = &cam_crop.c; |
| 1363 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1364 | struct device *dev = icd->dev.parent; |
| 1365 | struct v4l2_mbus_framefmt mf; |
| 1366 | unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v, |
| 1367 | out_width, out_height, scale_h, scale_v; |
| 1368 | int interm_width, interm_height; |
| 1369 | u32 capsr, cflcr; |
| 1370 | int ret; |
| 1371 | |
| 1372 | dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height, |
| 1373 | rect->left, rect->top); |
| 1374 | |
| 1375 | /* During camera cropping its output window can change too, stop CEU */ |
| 1376 | capsr = capture_save_reset(pcdev); |
| 1377 | dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr); |
| 1378 | |
| 1379 | /* 1. - 2. Apply iterative camera S_CROP for new input window. */ |
| 1380 | ret = client_s_crop(icd, a, &cam_crop); |
| 1381 | if (ret < 0) |
| 1382 | return ret; |
| 1383 | |
| 1384 | dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n", |
| 1385 | cam_rect->width, cam_rect->height, |
| 1386 | cam_rect->left, cam_rect->top); |
| 1387 | |
| 1388 | /* On success cam_crop contains current camera crop */ |
| 1389 | |
| 1390 | /* 3. Retrieve camera output window */ |
| 1391 | ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); |
| 1392 | if (ret < 0) |
| 1393 | return ret; |
| 1394 | |
| 1395 | if (mf.width > 2560 || mf.height > 1920) |
| 1396 | return -EINVAL; |
| 1397 | |
| 1398 | /* Cache camera output window */ |
| 1399 | cam->width = mf.width; |
| 1400 | cam->height = mf.height; |
| 1401 | |
| 1402 | /* 4. Calculate camera scales */ |
| 1403 | scale_cam_h = calc_generic_scale(cam_rect->width, mf.width); |
| 1404 | scale_cam_v = calc_generic_scale(cam_rect->height, mf.height); |
| 1405 | |
| 1406 | /* Calculate intermediate window */ |
| 1407 | interm_width = scale_down(rect->width, scale_cam_h); |
| 1408 | interm_height = scale_down(rect->height, scale_cam_v); |
| 1409 | |
| 1410 | if (pcdev->image_mode) { |
| 1411 | out_width = min(interm_width, icd->user_width); |
| 1412 | out_height = min(interm_height, icd->user_height); |
| 1413 | } else { |
| 1414 | out_width = interm_width; |
| 1415 | out_height = interm_height; |
| 1416 | } |
| 1417 | |
| 1418 | /* |
| 1419 | * 5. Calculate CEU scales from camera scales from results of (5) and |
| 1420 | * the user window |
| 1421 | */ |
| 1422 | scale_ceu_h = calc_scale(interm_width, &out_width); |
| 1423 | scale_ceu_v = calc_scale(interm_height, &out_height); |
| 1424 | |
| 1425 | /* Calculate camera scales */ |
| 1426 | scale_h = calc_generic_scale(cam_rect->width, out_width); |
| 1427 | scale_v = calc_generic_scale(cam_rect->height, out_height); |
| 1428 | |
| 1429 | dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v); |
| 1430 | |
| 1431 | /* Apply CEU scales. */ |
| 1432 | cflcr = scale_ceu_h | (scale_ceu_v << 16); |
| 1433 | if (cflcr != pcdev->cflcr) { |
| 1434 | pcdev->cflcr = cflcr; |
| 1435 | ceu_write(pcdev, CFLCR, cflcr); |
| 1436 | } |
| 1437 | |
| 1438 | icd->user_width = out_width; |
| 1439 | icd->user_height = out_height; |
| 1440 | cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_h) & ~1; |
| 1441 | cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_v) & ~1; |
| 1442 | |
| 1443 | /* 6. Use CEU cropping to crop to the new window. */ |
| 1444 | sh_mobile_ceu_set_rect(icd); |
| 1445 | |
| 1446 | cam->subrect = *rect; |
| 1447 | |
| 1448 | dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n", |
| 1449 | icd->user_width, icd->user_height, |
| 1450 | cam->ceu_left, cam->ceu_top); |
| 1451 | |
| 1452 | /* Restore capture */ |
| 1453 | if (pcdev->active) |
| 1454 | capsr |= 1; |
| 1455 | capture_restore(pcdev, capsr); |
| 1456 | |
| 1457 | /* Even if only camera cropping succeeded */ |
| 1458 | return ret; |
| 1459 | } |
| 1460 | |
| 1461 | static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd, |
| 1462 | struct v4l2_crop *a) |
| 1463 | { |
| 1464 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1465 | |
| 1466 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 1467 | a->c = cam->subrect; |
| 1468 | |
| 1469 | return 0; |
| 1470 | } |
| 1471 | |
| 1472 | /* |
| 1473 | * Calculate real client output window by applying new scales to the current |
| 1474 | * client crop. New scales are calculated from the requested output format and |
| 1475 | * CEU crop, mapped backed onto the client input (subrect). |
| 1476 | */ |
| 1477 | static void calculate_client_output(struct soc_camera_device *icd, |
| 1478 | struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf) |
| 1479 | { |
| 1480 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1481 | struct device *dev = icd->dev.parent; |
| 1482 | struct v4l2_rect *cam_subrect = &cam->subrect; |
| 1483 | unsigned int scale_v, scale_h; |
| 1484 | |
| 1485 | if (cam_subrect->width == cam->rect.width && |
| 1486 | cam_subrect->height == cam->rect.height) { |
| 1487 | /* No sub-cropping */ |
| 1488 | mf->width = pix->width; |
| 1489 | mf->height = pix->height; |
| 1490 | return; |
| 1491 | } |
| 1492 | |
| 1493 | /* 1.-2. Current camera scales and subwin - cached. */ |
| 1494 | |
| 1495 | dev_geo(dev, "2: subwin %ux%u@%u:%u\n", |
| 1496 | cam_subrect->width, cam_subrect->height, |
| 1497 | cam_subrect->left, cam_subrect->top); |
| 1498 | |
| 1499 | /* |
| 1500 | * 3. Calculate new combined scales from input sub-window to requested |
| 1501 | * user window. |
| 1502 | */ |
| 1503 | |
| 1504 | /* |
| 1505 | * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF |
| 1506 | * (128x96) or larger than VGA |
| 1507 | */ |
| 1508 | scale_h = calc_generic_scale(cam_subrect->width, pix->width); |
| 1509 | scale_v = calc_generic_scale(cam_subrect->height, pix->height); |
| 1510 | |
| 1511 | dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v); |
| 1512 | |
| 1513 | /* |
| 1514 | * 4. Calculate client output window by applying combined scales to real |
| 1515 | * input window. |
| 1516 | */ |
| 1517 | mf->width = scale_down(cam->rect.width, scale_h); |
| 1518 | mf->height = scale_down(cam->rect.height, scale_v); |
| 1519 | } |
| 1520 | |
| 1521 | /* Similar to set_crop multistage iterative algorithm */ |
| 1522 | static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, |
| 1523 | struct v4l2_format *f) |
| 1524 | { |
| 1525 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1526 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 1527 | struct sh_mobile_ceu_cam *cam = icd->host_priv; |
| 1528 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 1529 | struct v4l2_mbus_framefmt mf; |
| 1530 | struct device *dev = icd->dev.parent; |
| 1531 | __u32 pixfmt = pix->pixelformat; |
| 1532 | const struct soc_camera_format_xlate *xlate; |
| 1533 | /* Keep Compiler Happy */ |
| 1534 | unsigned int ceu_sub_width = 0, ceu_sub_height = 0; |
| 1535 | u16 scale_v, scale_h; |
| 1536 | int ret; |
| 1537 | bool image_mode; |
| 1538 | enum v4l2_field field; |
| 1539 | |
| 1540 | dev_geo(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height); |
| 1541 | |
| 1542 | switch (pix->field) { |
| 1543 | default: |
| 1544 | pix->field = V4L2_FIELD_NONE; |
| 1545 | /* fall-through */ |
| 1546 | case V4L2_FIELD_INTERLACED_TB: |
| 1547 | case V4L2_FIELD_INTERLACED_BT: |
| 1548 | case V4L2_FIELD_NONE: |
| 1549 | field = pix->field; |
| 1550 | break; |
| 1551 | case V4L2_FIELD_INTERLACED: |
| 1552 | field = V4L2_FIELD_INTERLACED_TB; |
| 1553 | break; |
| 1554 | } |
| 1555 | |
| 1556 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| 1557 | if (!xlate) { |
| 1558 | dev_warn(dev, "Format %x not found\n", pixfmt); |
| 1559 | return -EINVAL; |
| 1560 | } |
| 1561 | |
| 1562 | /* 1.-4. Calculate client output geometry */ |
| 1563 | calculate_client_output(icd, &f->fmt.pix, &mf); |
| 1564 | mf.field = pix->field; |
| 1565 | mf.colorspace = pix->colorspace; |
| 1566 | mf.code = xlate->code; |
| 1567 | |
| 1568 | switch (pixfmt) { |
| 1569 | case V4L2_PIX_FMT_NV12: |
| 1570 | case V4L2_PIX_FMT_NV21: |
| 1571 | case V4L2_PIX_FMT_NV16: |
| 1572 | case V4L2_PIX_FMT_NV61: |
| 1573 | image_mode = true; |
| 1574 | break; |
| 1575 | default: |
| 1576 | image_mode = false; |
| 1577 | } |
| 1578 | |
| 1579 | dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height); |
| 1580 | |
| 1581 | /* 5. - 9. */ |
| 1582 | ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height, |
| 1583 | image_mode && V4L2_FIELD_NONE == field); |
| 1584 | |
| 1585 | dev_geo(dev, "5-9: client scale return %d\n", ret); |
| 1586 | |
| 1587 | /* Done with the camera. Now see if we can improve the result */ |
| 1588 | |
| 1589 | dev_geo(dev, "fmt %ux%u, requested %ux%u\n", |
| 1590 | mf.width, mf.height, pix->width, pix->height); |
| 1591 | if (ret < 0) |
| 1592 | return ret; |
| 1593 | |
| 1594 | if (mf.code != xlate->code) |
| 1595 | return -EINVAL; |
| 1596 | |
| 1597 | /* 9. Prepare CEU crop */ |
| 1598 | cam->width = mf.width; |
| 1599 | cam->height = mf.height; |
| 1600 | |
| 1601 | /* 10. Use CEU scaling to scale to the requested user window. */ |
| 1602 | |
| 1603 | /* We cannot scale up */ |
| 1604 | if (pix->width > ceu_sub_width) |
| 1605 | ceu_sub_width = pix->width; |
| 1606 | |
| 1607 | if (pix->height > ceu_sub_height) |
| 1608 | ceu_sub_height = pix->height; |
| 1609 | |
| 1610 | pix->colorspace = mf.colorspace; |
| 1611 | |
| 1612 | if (image_mode) { |
| 1613 | /* Scale pix->{width x height} down to width x height */ |
| 1614 | scale_h = calc_scale(ceu_sub_width, &pix->width); |
| 1615 | scale_v = calc_scale(ceu_sub_height, &pix->height); |
| 1616 | } else { |
| 1617 | pix->width = ceu_sub_width; |
| 1618 | pix->height = ceu_sub_height; |
| 1619 | scale_h = 0; |
| 1620 | scale_v = 0; |
| 1621 | } |
| 1622 | |
| 1623 | pcdev->cflcr = scale_h | (scale_v << 16); |
| 1624 | |
| 1625 | /* |
| 1626 | * We have calculated CFLCR, the actual configuration will be performed |
| 1627 | * in sh_mobile_ceu_set_bus_param() |
| 1628 | */ |
| 1629 | |
| 1630 | dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n", |
| 1631 | ceu_sub_width, scale_h, pix->width, |
| 1632 | ceu_sub_height, scale_v, pix->height); |
| 1633 | |
| 1634 | cam->code = xlate->code; |
| 1635 | icd->current_fmt = xlate; |
| 1636 | |
| 1637 | pcdev->field = field; |
| 1638 | pcdev->image_mode = image_mode; |
| 1639 | |
| 1640 | return 0; |
| 1641 | } |
| 1642 | |
| 1643 | static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, |
| 1644 | struct v4l2_format *f) |
| 1645 | { |
| 1646 | const struct soc_camera_format_xlate *xlate; |
| 1647 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 1648 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1649 | struct v4l2_mbus_framefmt mf; |
| 1650 | __u32 pixfmt = pix->pixelformat; |
| 1651 | int width, height; |
| 1652 | int ret; |
| 1653 | |
| 1654 | dev_geo(icd->dev.parent, "TRY_FMT(pix=0x%x, %ux%u)\n", |
| 1655 | pixfmt, pix->width, pix->height); |
| 1656 | |
| 1657 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| 1658 | if (!xlate) { |
| 1659 | dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt); |
| 1660 | return -EINVAL; |
| 1661 | } |
| 1662 | |
| 1663 | /* FIXME: calculate using depth and bus width */ |
| 1664 | |
| 1665 | v4l_bound_align_image(&pix->width, 2, 2560, 1, |
| 1666 | &pix->height, 4, 1920, 2, 0); |
| 1667 | |
| 1668 | width = pix->width; |
| 1669 | height = pix->height; |
| 1670 | |
| 1671 | pix->bytesperline = soc_mbus_bytes_per_line(width, xlate->host_fmt); |
| 1672 | if ((int)pix->bytesperline < 0) |
| 1673 | return pix->bytesperline; |
| 1674 | pix->sizeimage = height * pix->bytesperline; |
| 1675 | |
| 1676 | /* limit to sensor capabilities */ |
| 1677 | mf.width = pix->width; |
| 1678 | mf.height = pix->height; |
| 1679 | mf.field = pix->field; |
| 1680 | mf.code = xlate->code; |
| 1681 | mf.colorspace = pix->colorspace; |
| 1682 | |
| 1683 | ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, try_mbus_fmt, &mf); |
| 1684 | if (ret < 0) |
| 1685 | return ret; |
| 1686 | |
| 1687 | pix->width = mf.width; |
| 1688 | pix->height = mf.height; |
| 1689 | pix->field = mf.field; |
| 1690 | pix->colorspace = mf.colorspace; |
| 1691 | |
| 1692 | switch (pixfmt) { |
| 1693 | case V4L2_PIX_FMT_NV12: |
| 1694 | case V4L2_PIX_FMT_NV21: |
| 1695 | case V4L2_PIX_FMT_NV16: |
| 1696 | case V4L2_PIX_FMT_NV61: |
| 1697 | /* FIXME: check against rect_max after converting soc-camera */ |
| 1698 | /* We can scale precisely, need a bigger image from camera */ |
| 1699 | if (pix->width < width || pix->height < height) { |
| 1700 | /* |
| 1701 | * We presume, the sensor behaves sanely, i.e., if |
| 1702 | * requested a bigger rectangle, it will not return a |
| 1703 | * smaller one. |
| 1704 | */ |
| 1705 | mf.width = 2560; |
| 1706 | mf.height = 1920; |
| 1707 | ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, |
| 1708 | try_mbus_fmt, &mf); |
| 1709 | if (ret < 0) { |
| 1710 | /* Shouldn't actually happen... */ |
| 1711 | dev_err(icd->dev.parent, |
| 1712 | "FIXME: client try_fmt() = %d\n", ret); |
| 1713 | return ret; |
| 1714 | } |
| 1715 | } |
| 1716 | /* We will scale exactly */ |
| 1717 | if (mf.width > width) |
| 1718 | pix->width = width; |
| 1719 | if (mf.height > height) |
| 1720 | pix->height = height; |
| 1721 | } |
| 1722 | |
| 1723 | dev_geo(icd->dev.parent, "%s(): return %d, fmt 0x%x, %ux%u\n", |
| 1724 | __func__, ret, pix->pixelformat, pix->width, pix->height); |
| 1725 | |
| 1726 | return ret; |
| 1727 | } |
| 1728 | |
| 1729 | static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf, |
| 1730 | struct v4l2_requestbuffers *p) |
| 1731 | { |
| 1732 | int i; |
| 1733 | |
| 1734 | /* |
| 1735 | * This is for locking debugging only. I removed spinlocks and now I |
| 1736 | * check whether .prepare is ever called on a linked buffer, or whether |
| 1737 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now |
| 1738 | * it hadn't triggered |
| 1739 | */ |
| 1740 | for (i = 0; i < p->count; i++) { |
| 1741 | struct sh_mobile_ceu_buffer *buf; |
| 1742 | |
| 1743 | buf = container_of(icf->vb_vidq.bufs[i], |
| 1744 | struct sh_mobile_ceu_buffer, vb); |
| 1745 | INIT_LIST_HEAD(&buf->vb.queue); |
| 1746 | } |
| 1747 | |
| 1748 | return 0; |
| 1749 | } |
| 1750 | |
| 1751 | static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) |
| 1752 | { |
| 1753 | struct soc_camera_file *icf = file->private_data; |
| 1754 | struct sh_mobile_ceu_buffer *buf; |
| 1755 | |
| 1756 | buf = list_entry(icf->vb_vidq.stream.next, |
| 1757 | struct sh_mobile_ceu_buffer, vb.stream); |
| 1758 | |
| 1759 | poll_wait(file, &buf->vb.done, pt); |
| 1760 | |
| 1761 | if (buf->vb.state == VIDEOBUF_DONE || |
| 1762 | buf->vb.state == VIDEOBUF_ERROR) |
| 1763 | return POLLIN|POLLRDNORM; |
| 1764 | |
| 1765 | return 0; |
| 1766 | } |
| 1767 | |
| 1768 | static int sh_mobile_ceu_querycap(struct soc_camera_host *ici, |
| 1769 | struct v4l2_capability *cap) |
| 1770 | { |
| 1771 | strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); |
| 1772 | cap->version = KERNEL_VERSION(0, 0, 5); |
| 1773 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| 1774 | return 0; |
| 1775 | } |
| 1776 | |
| 1777 | static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q, |
| 1778 | struct soc_camera_device *icd) |
| 1779 | { |
| 1780 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1781 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 1782 | |
| 1783 | videobuf_queue_dma_contig_init(q, |
| 1784 | &sh_mobile_ceu_videobuf_ops, |
| 1785 | icd->dev.parent, &pcdev->lock, |
| 1786 | V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| 1787 | pcdev->field, |
| 1788 | sizeof(struct sh_mobile_ceu_buffer), |
| 1789 | icd); |
| 1790 | } |
| 1791 | |
| 1792 | static int sh_mobile_ceu_get_parm(struct soc_camera_device *icd, |
| 1793 | struct v4l2_streamparm *parm) |
| 1794 | { |
| 1795 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1796 | |
| 1797 | return v4l2_subdev_call(sd, video, g_parm, parm); |
| 1798 | } |
| 1799 | |
| 1800 | static int sh_mobile_ceu_set_parm(struct soc_camera_device *icd, |
| 1801 | struct v4l2_streamparm *parm) |
| 1802 | { |
| 1803 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| 1804 | |
| 1805 | return v4l2_subdev_call(sd, video, s_parm, parm); |
| 1806 | } |
| 1807 | |
| 1808 | static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd, |
| 1809 | struct v4l2_control *ctrl) |
| 1810 | { |
| 1811 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1812 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 1813 | u32 val; |
| 1814 | |
| 1815 | switch (ctrl->id) { |
| 1816 | case V4L2_CID_SHARPNESS: |
| 1817 | val = ceu_read(pcdev, CLFCR); |
| 1818 | ctrl->value = val ^ 1; |
| 1819 | return 0; |
| 1820 | } |
| 1821 | return -ENOIOCTLCMD; |
| 1822 | } |
| 1823 | |
| 1824 | static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd, |
| 1825 | struct v4l2_control *ctrl) |
| 1826 | { |
| 1827 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1828 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 1829 | |
| 1830 | switch (ctrl->id) { |
| 1831 | case V4L2_CID_SHARPNESS: |
| 1832 | switch (icd->current_fmt->host_fmt->fourcc) { |
| 1833 | case V4L2_PIX_FMT_NV12: |
| 1834 | case V4L2_PIX_FMT_NV21: |
| 1835 | case V4L2_PIX_FMT_NV16: |
| 1836 | case V4L2_PIX_FMT_NV61: |
| 1837 | ceu_write(pcdev, CLFCR, !ctrl->value); |
| 1838 | return 0; |
| 1839 | } |
| 1840 | return -EINVAL; |
| 1841 | } |
| 1842 | return -ENOIOCTLCMD; |
| 1843 | } |
| 1844 | |
| 1845 | static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = { |
| 1846 | { |
| 1847 | .id = V4L2_CID_SHARPNESS, |
| 1848 | .type = V4L2_CTRL_TYPE_BOOLEAN, |
| 1849 | .name = "Low-pass filter", |
| 1850 | .minimum = 0, |
| 1851 | .maximum = 1, |
| 1852 | .step = 1, |
| 1853 | .default_value = 0, |
| 1854 | }, |
| 1855 | }; |
| 1856 | |
| 1857 | static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { |
| 1858 | .owner = THIS_MODULE, |
| 1859 | .add = sh_mobile_ceu_add_device, |
| 1860 | .remove = sh_mobile_ceu_remove_device, |
| 1861 | .get_formats = sh_mobile_ceu_get_formats, |
| 1862 | .put_formats = sh_mobile_ceu_put_formats, |
| 1863 | .get_crop = sh_mobile_ceu_get_crop, |
| 1864 | .set_crop = sh_mobile_ceu_set_crop, |
| 1865 | .set_fmt = sh_mobile_ceu_set_fmt, |
| 1866 | .try_fmt = sh_mobile_ceu_try_fmt, |
| 1867 | .set_ctrl = sh_mobile_ceu_set_ctrl, |
| 1868 | .get_ctrl = sh_mobile_ceu_get_ctrl, |
| 1869 | .set_parm = sh_mobile_ceu_set_parm, |
| 1870 | .get_parm = sh_mobile_ceu_get_parm, |
| 1871 | .reqbufs = sh_mobile_ceu_reqbufs, |
| 1872 | .poll = sh_mobile_ceu_poll, |
| 1873 | .querycap = sh_mobile_ceu_querycap, |
| 1874 | .set_bus_param = sh_mobile_ceu_set_bus_param, |
| 1875 | .init_videobuf = sh_mobile_ceu_init_videobuf, |
| 1876 | .controls = sh_mobile_ceu_controls, |
| 1877 | .num_controls = ARRAY_SIZE(sh_mobile_ceu_controls), |
| 1878 | }; |
| 1879 | |
| 1880 | struct bus_wait { |
| 1881 | struct notifier_block notifier; |
| 1882 | struct completion completion; |
| 1883 | struct device *dev; |
| 1884 | }; |
| 1885 | |
| 1886 | static int bus_notify(struct notifier_block *nb, |
| 1887 | unsigned long action, void *data) |
| 1888 | { |
| 1889 | struct device *dev = data; |
| 1890 | struct bus_wait *wait = container_of(nb, struct bus_wait, notifier); |
| 1891 | |
| 1892 | if (wait->dev != dev) |
| 1893 | return NOTIFY_DONE; |
| 1894 | |
| 1895 | switch (action) { |
| 1896 | case BUS_NOTIFY_UNBOUND_DRIVER: |
| 1897 | /* Protect from module unloading */ |
| 1898 | wait_for_completion(&wait->completion); |
| 1899 | return NOTIFY_OK; |
| 1900 | } |
| 1901 | return NOTIFY_DONE; |
| 1902 | } |
| 1903 | |
| 1904 | static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev) |
| 1905 | { |
| 1906 | struct sh_mobile_ceu_dev *pcdev; |
| 1907 | struct resource *res; |
| 1908 | void __iomem *base; |
| 1909 | unsigned int irq; |
| 1910 | int err = 0; |
| 1911 | struct bus_wait wait = { |
| 1912 | .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion), |
| 1913 | .notifier.notifier_call = bus_notify, |
| 1914 | }; |
| 1915 | struct device *csi2; |
| 1916 | |
| 1917 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1918 | irq = platform_get_irq(pdev, 0); |
| 1919 | if (!res || (int)irq <= 0) { |
| 1920 | dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); |
| 1921 | err = -ENODEV; |
| 1922 | goto exit; |
| 1923 | } |
| 1924 | |
| 1925 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); |
| 1926 | if (!pcdev) { |
| 1927 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
| 1928 | err = -ENOMEM; |
| 1929 | goto exit; |
| 1930 | } |
| 1931 | |
| 1932 | INIT_LIST_HEAD(&pcdev->capture); |
| 1933 | spin_lock_init(&pcdev->lock); |
| 1934 | |
| 1935 | pcdev->pdata = pdev->dev.platform_data; |
| 1936 | if (!pcdev->pdata) { |
| 1937 | err = -EINVAL; |
| 1938 | dev_err(&pdev->dev, "CEU platform data not set.\n"); |
| 1939 | goto exit_kfree; |
| 1940 | } |
| 1941 | |
| 1942 | base = ioremap_nocache(res->start, resource_size(res)); |
| 1943 | if (!base) { |
| 1944 | err = -ENXIO; |
| 1945 | dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); |
| 1946 | goto exit_kfree; |
| 1947 | } |
| 1948 | |
| 1949 | pcdev->irq = irq; |
| 1950 | pcdev->base = base; |
| 1951 | pcdev->video_limit = 0; /* only enabled if second resource exists */ |
| 1952 | |
| 1953 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| 1954 | if (res) { |
| 1955 | err = dma_declare_coherent_memory(&pdev->dev, res->start, |
| 1956 | res->start, |
| 1957 | resource_size(res), |
| 1958 | DMA_MEMORY_MAP | |
| 1959 | DMA_MEMORY_EXCLUSIVE); |
| 1960 | if (!err) { |
| 1961 | dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); |
| 1962 | err = -ENXIO; |
| 1963 | goto exit_iounmap; |
| 1964 | } |
| 1965 | |
| 1966 | pcdev->video_limit = resource_size(res); |
| 1967 | } |
| 1968 | |
| 1969 | /* request irq */ |
| 1970 | err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, |
| 1971 | dev_name(&pdev->dev), pcdev); |
| 1972 | if (err) { |
| 1973 | dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); |
| 1974 | goto exit_release_mem; |
| 1975 | } |
| 1976 | |
| 1977 | pm_suspend_ignore_children(&pdev->dev, true); |
| 1978 | pm_runtime_enable(&pdev->dev); |
| 1979 | pm_runtime_resume(&pdev->dev); |
| 1980 | |
| 1981 | pcdev->ici.priv = pcdev; |
| 1982 | pcdev->ici.v4l2_dev.dev = &pdev->dev; |
| 1983 | pcdev->ici.nr = pdev->id; |
| 1984 | pcdev->ici.drv_name = dev_name(&pdev->dev); |
| 1985 | pcdev->ici.ops = &sh_mobile_ceu_host_ops; |
| 1986 | |
| 1987 | /* CSI2 interfacing */ |
| 1988 | csi2 = pcdev->pdata->csi2_dev; |
| 1989 | if (csi2) { |
| 1990 | wait.dev = csi2; |
| 1991 | |
| 1992 | err = bus_register_notifier(&platform_bus_type, &wait.notifier); |
| 1993 | if (err < 0) |
| 1994 | goto exit_free_clk; |
| 1995 | |
| 1996 | /* |
| 1997 | * From this point the driver module will not unload, until |
| 1998 | * we complete the completion. |
| 1999 | */ |
| 2000 | |
| 2001 | if (!csi2->driver || !csi2->driver->owner) { |
| 2002 | complete(&wait.completion); |
| 2003 | /* Either too late, or probing failed */ |
| 2004 | bus_unregister_notifier(&platform_bus_type, &wait.notifier); |
| 2005 | err = -ENXIO; |
| 2006 | goto exit_free_clk; |
| 2007 | } |
| 2008 | |
| 2009 | /* |
| 2010 | * The module is still loaded, in the worst case it is hanging |
| 2011 | * in device release on our completion. So, _now_ dereferencing |
| 2012 | * the "owner" is safe! |
| 2013 | */ |
| 2014 | |
| 2015 | err = try_module_get(csi2->driver->owner); |
| 2016 | |
| 2017 | /* Let notifier complete, if it has been locked */ |
| 2018 | complete(&wait.completion); |
| 2019 | bus_unregister_notifier(&platform_bus_type, &wait.notifier); |
| 2020 | if (!err) { |
| 2021 | err = -ENODEV; |
| 2022 | goto exit_free_clk; |
| 2023 | } |
| 2024 | } |
| 2025 | |
| 2026 | err = soc_camera_host_register(&pcdev->ici); |
| 2027 | if (err) |
| 2028 | goto exit_module_put; |
| 2029 | |
| 2030 | return 0; |
| 2031 | |
| 2032 | exit_module_put: |
| 2033 | if (csi2 && csi2->driver) |
| 2034 | module_put(csi2->driver->owner); |
| 2035 | exit_free_clk: |
| 2036 | pm_runtime_disable(&pdev->dev); |
| 2037 | free_irq(pcdev->irq, pcdev); |
| 2038 | exit_release_mem: |
| 2039 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) |
| 2040 | dma_release_declared_memory(&pdev->dev); |
| 2041 | exit_iounmap: |
| 2042 | iounmap(base); |
| 2043 | exit_kfree: |
| 2044 | kfree(pcdev); |
| 2045 | exit: |
| 2046 | return err; |
| 2047 | } |
| 2048 | |
| 2049 | static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev) |
| 2050 | { |
| 2051 | struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
| 2052 | struct sh_mobile_ceu_dev *pcdev = container_of(soc_host, |
| 2053 | struct sh_mobile_ceu_dev, ici); |
| 2054 | struct device *csi2 = pcdev->pdata->csi2_dev; |
| 2055 | |
| 2056 | soc_camera_host_unregister(soc_host); |
| 2057 | pm_runtime_disable(&pdev->dev); |
| 2058 | free_irq(pcdev->irq, pcdev); |
| 2059 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) |
| 2060 | dma_release_declared_memory(&pdev->dev); |
| 2061 | iounmap(pcdev->base); |
| 2062 | if (csi2 && csi2->driver) |
| 2063 | module_put(csi2->driver->owner); |
| 2064 | kfree(pcdev); |
| 2065 | |
| 2066 | return 0; |
| 2067 | } |
| 2068 | |
| 2069 | static int sh_mobile_ceu_runtime_nop(struct device *dev) |
| 2070 | { |
| 2071 | /* Runtime PM callback shared between ->runtime_suspend() |
| 2072 | * and ->runtime_resume(). Simply returns success. |
| 2073 | * |
| 2074 | * This driver re-initializes all registers after |
| 2075 | * pm_runtime_get_sync() anyway so there is no need |
| 2076 | * to save and restore registers here. |
| 2077 | */ |
| 2078 | return 0; |
| 2079 | } |
| 2080 | |
| 2081 | static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = { |
| 2082 | .runtime_suspend = sh_mobile_ceu_runtime_nop, |
| 2083 | .runtime_resume = sh_mobile_ceu_runtime_nop, |
| 2084 | }; |
| 2085 | |
| 2086 | static struct platform_driver sh_mobile_ceu_driver = { |
| 2087 | .driver = { |
| 2088 | .name = "sh_mobile_ceu", |
| 2089 | .pm = &sh_mobile_ceu_dev_pm_ops, |
| 2090 | }, |
| 2091 | .probe = sh_mobile_ceu_probe, |
| 2092 | .remove = __devexit_p(sh_mobile_ceu_remove), |
| 2093 | }; |
| 2094 | |
| 2095 | static int __init sh_mobile_ceu_init(void) |
| 2096 | { |
| 2097 | /* Whatever return code */ |
| 2098 | request_module("sh_mobile_csi2"); |
| 2099 | return platform_driver_register(&sh_mobile_ceu_driver); |
| 2100 | } |
| 2101 | |
| 2102 | static void __exit sh_mobile_ceu_exit(void) |
| 2103 | { |
| 2104 | platform_driver_unregister(&sh_mobile_ceu_driver); |
| 2105 | } |
| 2106 | |
| 2107 | module_init(sh_mobile_ceu_init); |
| 2108 | module_exit(sh_mobile_ceu_exit); |
| 2109 | |
| 2110 | MODULE_DESCRIPTION("SuperH Mobile CEU driver"); |
| 2111 | MODULE_AUTHOR("Magnus Damm"); |
| 2112 | MODULE_LICENSE("GPL"); |
| 2113 | MODULE_ALIAS("platform:sh_mobile_ceu"); |