Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 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/device.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/mutex.h> |
| 33 | #include <linux/videodev2.h> |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 34 | #include <linux/clk.h> |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 35 | |
| 36 | #include <media/v4l2-common.h> |
| 37 | #include <media/v4l2-dev.h> |
| 38 | #include <media/soc_camera.h> |
| 39 | #include <media/sh_mobile_ceu.h> |
| 40 | #include <media/videobuf-dma-contig.h> |
| 41 | |
| 42 | /* register offsets for sh7722 / sh7723 */ |
| 43 | |
Magnus Damm | dd54203 | 2008-10-16 19:50:22 -0300 | [diff] [blame] | 44 | #define CAPSR 0x00 /* Capture start register */ |
| 45 | #define CAPCR 0x04 /* Capture control register */ |
| 46 | #define CAMCR 0x08 /* Capture interface control register */ |
| 47 | #define CMCYR 0x0c /* Capture interface cycle register */ |
| 48 | #define CAMOR 0x10 /* Capture interface offset register */ |
| 49 | #define CAPWR 0x14 /* Capture interface width register */ |
| 50 | #define CAIFR 0x18 /* Capture interface input format register */ |
| 51 | #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */ |
| 52 | #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */ |
| 53 | #define CRCNTR 0x28 /* CEU register control register */ |
| 54 | #define CRCMPR 0x2c /* CEU register forcible control register */ |
| 55 | #define CFLCR 0x30 /* Capture filter control register */ |
| 56 | #define CFSZR 0x34 /* Capture filter size clip register */ |
| 57 | #define CDWDR 0x38 /* Capture destination width register */ |
| 58 | #define CDAYR 0x3c /* Capture data address Y register */ |
| 59 | #define CDACR 0x40 /* Capture data address C register */ |
| 60 | #define CDBYR 0x44 /* Capture data bottom-field address Y register */ |
| 61 | #define CDBCR 0x48 /* Capture data bottom-field address C register */ |
| 62 | #define CBDSR 0x4c /* Capture bundle destination size register */ |
| 63 | #define CFWCR 0x5c /* Firewall operation control register */ |
| 64 | #define CLFCR 0x60 /* Capture low-pass filter control register */ |
| 65 | #define CDOCR 0x64 /* Capture data output control register */ |
| 66 | #define CDDCR 0x68 /* Capture data complexity level register */ |
| 67 | #define CDDAR 0x6c /* Capture data complexity level address register */ |
| 68 | #define CEIER 0x70 /* Capture event interrupt enable register */ |
| 69 | #define CETCR 0x74 /* Capture event flag clear register */ |
| 70 | #define CSTSR 0x7c /* Capture status register */ |
| 71 | #define CSRTR 0x80 /* Capture software reset register */ |
| 72 | #define CDSSR 0x84 /* Capture data size register */ |
| 73 | #define CDAYR2 0x90 /* Capture data address Y register 2 */ |
| 74 | #define CDACR2 0x94 /* Capture data address C register 2 */ |
| 75 | #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */ |
| 76 | #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */ |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 77 | |
| 78 | static DEFINE_MUTEX(camera_lock); |
| 79 | |
| 80 | /* per video frame buffer */ |
| 81 | struct sh_mobile_ceu_buffer { |
| 82 | struct videobuf_buffer vb; /* v4l buffer must be first */ |
| 83 | const struct soc_camera_data_format *fmt; |
| 84 | }; |
| 85 | |
| 86 | struct sh_mobile_ceu_dev { |
| 87 | struct device *dev; |
| 88 | struct soc_camera_host ici; |
| 89 | struct soc_camera_device *icd; |
| 90 | |
| 91 | unsigned int irq; |
| 92 | void __iomem *base; |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 93 | struct clk *clk; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 94 | unsigned long video_limit; |
| 95 | |
Guennadi Liakhovetski | c60f2b5 | 2008-07-17 17:30:47 -0300 | [diff] [blame] | 96 | /* lock used to protect videobuf */ |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 97 | spinlock_t lock; |
| 98 | struct list_head capture; |
| 99 | struct videobuf_buffer *active; |
| 100 | |
| 101 | struct sh_mobile_ceu_info *pdata; |
| 102 | }; |
| 103 | |
| 104 | static void ceu_write(struct sh_mobile_ceu_dev *priv, |
| 105 | unsigned long reg_offs, unsigned long data) |
| 106 | { |
| 107 | iowrite32(data, priv->base + reg_offs); |
| 108 | } |
| 109 | |
| 110 | static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv, |
| 111 | unsigned long reg_offs) |
| 112 | { |
| 113 | return ioread32(priv->base + reg_offs); |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * Videobuf operations |
| 118 | */ |
| 119 | static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq, |
| 120 | unsigned int *count, |
| 121 | unsigned int *size) |
| 122 | { |
| 123 | struct soc_camera_device *icd = vq->priv_data; |
| 124 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 125 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 126 | int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3; |
| 127 | |
| 128 | *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel); |
| 129 | |
| 130 | if (0 == *count) |
| 131 | *count = 2; |
| 132 | |
| 133 | if (pcdev->video_limit) { |
| 134 | while (*size * *count > pcdev->video_limit) |
| 135 | (*count)--; |
| 136 | } |
| 137 | |
| 138 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static void free_buffer(struct videobuf_queue *vq, |
| 144 | struct sh_mobile_ceu_buffer *buf) |
| 145 | { |
| 146 | struct soc_camera_device *icd = vq->priv_data; |
| 147 | |
Hans Verkuil | 86751b0 | 2008-07-18 01:35:14 -0300 | [diff] [blame] | 148 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 149 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
| 150 | |
| 151 | if (in_interrupt()) |
| 152 | BUG(); |
| 153 | |
| 154 | videobuf_dma_contig_free(vq, &buf->vb); |
| 155 | dev_dbg(&icd->dev, "%s freed\n", __func__); |
| 156 | buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| 157 | } |
| 158 | |
| 159 | static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) |
| 160 | { |
| 161 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1); |
| 162 | ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313); |
| 163 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1); |
| 164 | |
| 165 | ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000); |
| 166 | |
| 167 | ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10); |
| 168 | |
| 169 | if (pcdev->active) { |
Magnus Damm | 51354cc | 2008-10-16 19:51:20 -0300 | [diff] [blame] | 170 | pcdev->active->state = VIDEOBUF_ACTIVE; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 171 | ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active)); |
| 172 | ceu_write(pcdev, CAPSR, 0x1); /* start capture */ |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq, |
| 177 | struct videobuf_buffer *vb, |
| 178 | enum v4l2_field field) |
| 179 | { |
| 180 | struct soc_camera_device *icd = vq->priv_data; |
| 181 | struct sh_mobile_ceu_buffer *buf; |
| 182 | int ret; |
| 183 | |
| 184 | buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); |
| 185 | |
Hans Verkuil | 86751b0 | 2008-07-18 01:35:14 -0300 | [diff] [blame] | 186 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 187 | vb, vb->baddr, vb->bsize); |
| 188 | |
| 189 | /* Added list head initialization on alloc */ |
| 190 | WARN_ON(!list_empty(&vb->queue)); |
| 191 | |
| 192 | #ifdef DEBUG |
| 193 | /* This can be useful if you want to see if we actually fill |
| 194 | * the buffer with something */ |
| 195 | memset((void *)vb->baddr, 0xaa, vb->bsize); |
| 196 | #endif |
| 197 | |
| 198 | BUG_ON(NULL == icd->current_fmt); |
| 199 | |
| 200 | if (buf->fmt != icd->current_fmt || |
| 201 | vb->width != icd->width || |
| 202 | vb->height != icd->height || |
| 203 | vb->field != field) { |
| 204 | buf->fmt = icd->current_fmt; |
| 205 | vb->width = icd->width; |
| 206 | vb->height = icd->height; |
| 207 | vb->field = field; |
| 208 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 209 | } |
| 210 | |
| 211 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); |
| 212 | if (0 != vb->baddr && vb->bsize < vb->size) { |
| 213 | ret = -EINVAL; |
| 214 | goto out; |
| 215 | } |
| 216 | |
| 217 | if (vb->state == VIDEOBUF_NEEDS_INIT) { |
| 218 | ret = videobuf_iolock(vq, vb, NULL); |
| 219 | if (ret) |
| 220 | goto fail; |
| 221 | vb->state = VIDEOBUF_PREPARED; |
| 222 | } |
| 223 | |
| 224 | return 0; |
| 225 | fail: |
| 226 | free_buffer(vq, buf); |
| 227 | out: |
| 228 | return ret; |
| 229 | } |
| 230 | |
| 231 | static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, |
| 232 | struct videobuf_buffer *vb) |
| 233 | { |
| 234 | struct soc_camera_device *icd = vq->priv_data; |
| 235 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 236 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 237 | unsigned long flags; |
| 238 | |
Hans Verkuil | 86751b0 | 2008-07-18 01:35:14 -0300 | [diff] [blame] | 239 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 240 | vb, vb->baddr, vb->bsize); |
| 241 | |
Magnus Damm | 51354cc | 2008-10-16 19:51:20 -0300 | [diff] [blame] | 242 | vb->state = VIDEOBUF_QUEUED; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 243 | spin_lock_irqsave(&pcdev->lock, flags); |
| 244 | list_add_tail(&vb->queue, &pcdev->capture); |
| 245 | |
| 246 | if (!pcdev->active) { |
| 247 | pcdev->active = vb; |
| 248 | sh_mobile_ceu_capture(pcdev); |
| 249 | } |
| 250 | |
| 251 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 252 | } |
| 253 | |
| 254 | static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, |
| 255 | struct videobuf_buffer *vb) |
| 256 | { |
| 257 | free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb)); |
| 258 | } |
| 259 | |
| 260 | static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = { |
| 261 | .buf_setup = sh_mobile_ceu_videobuf_setup, |
| 262 | .buf_prepare = sh_mobile_ceu_videobuf_prepare, |
| 263 | .buf_queue = sh_mobile_ceu_videobuf_queue, |
| 264 | .buf_release = sh_mobile_ceu_videobuf_release, |
| 265 | }; |
| 266 | |
| 267 | static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) |
| 268 | { |
| 269 | struct sh_mobile_ceu_dev *pcdev = data; |
| 270 | struct videobuf_buffer *vb; |
| 271 | unsigned long flags; |
| 272 | |
| 273 | spin_lock_irqsave(&pcdev->lock, flags); |
| 274 | |
| 275 | vb = pcdev->active; |
| 276 | list_del_init(&vb->queue); |
| 277 | |
| 278 | if (!list_empty(&pcdev->capture)) |
| 279 | pcdev->active = list_entry(pcdev->capture.next, |
| 280 | struct videobuf_buffer, queue); |
| 281 | else |
| 282 | pcdev->active = NULL; |
| 283 | |
| 284 | sh_mobile_ceu_capture(pcdev); |
| 285 | |
| 286 | vb->state = VIDEOBUF_DONE; |
| 287 | do_gettimeofday(&vb->ts); |
| 288 | vb->field_count++; |
| 289 | wake_up(&vb->done); |
| 290 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 291 | |
| 292 | return IRQ_HANDLED; |
| 293 | } |
| 294 | |
| 295 | static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) |
| 296 | { |
| 297 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 298 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 299 | int ret = -EBUSY; |
| 300 | |
| 301 | mutex_lock(&camera_lock); |
| 302 | |
| 303 | if (pcdev->icd) |
| 304 | goto err; |
| 305 | |
| 306 | dev_info(&icd->dev, |
| 307 | "SuperH Mobile CEU driver attached to camera %d\n", |
| 308 | icd->devnum); |
| 309 | |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 310 | ret = icd->ops->init(icd); |
| 311 | if (ret) |
| 312 | goto err; |
| 313 | |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 314 | clk_enable(pcdev->clk); |
| 315 | |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 316 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
| 317 | while (ceu_read(pcdev, CSTSR) & 1) |
| 318 | msleep(1); |
| 319 | |
| 320 | pcdev->icd = icd; |
| 321 | err: |
| 322 | mutex_unlock(&camera_lock); |
| 323 | |
| 324 | return ret; |
| 325 | } |
| 326 | |
| 327 | static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) |
| 328 | { |
| 329 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 330 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
Magnus Damm | 51354cc | 2008-10-16 19:51:20 -0300 | [diff] [blame] | 331 | unsigned long flags; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 332 | |
| 333 | BUG_ON(icd != pcdev->icd); |
| 334 | |
| 335 | /* disable capture, disable interrupts */ |
| 336 | ceu_write(pcdev, CEIER, 0); |
| 337 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
Magnus Damm | 51354cc | 2008-10-16 19:51:20 -0300 | [diff] [blame] | 338 | |
| 339 | /* make sure active buffer is canceled */ |
| 340 | spin_lock_irqsave(&pcdev->lock, flags); |
| 341 | if (pcdev->active) { |
| 342 | list_del(&pcdev->active->queue); |
| 343 | pcdev->active->state = VIDEOBUF_ERROR; |
| 344 | wake_up_all(&pcdev->active->done); |
| 345 | pcdev->active = NULL; |
| 346 | } |
| 347 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 348 | |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 349 | clk_disable(pcdev->clk); |
| 350 | |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 351 | icd->ops->release(icd); |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 352 | |
| 353 | dev_info(&icd->dev, |
| 354 | "SuperH Mobile CEU driver detached from camera %d\n", |
| 355 | icd->devnum); |
| 356 | |
| 357 | pcdev->icd = NULL; |
| 358 | } |
| 359 | |
| 360 | static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, |
| 361 | __u32 pixfmt) |
| 362 | { |
| 363 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 364 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 365 | int ret, buswidth, width, cfszr_width, cdwdr_width; |
| 366 | unsigned long camera_flags, common_flags, value; |
| 367 | |
| 368 | camera_flags = icd->ops->query_bus_param(icd); |
| 369 | common_flags = soc_camera_bus_param_compatible(camera_flags, |
| 370 | pcdev->pdata->flags); |
| 371 | if (!common_flags) |
| 372 | return -EINVAL; |
| 373 | |
| 374 | ret = icd->ops->set_bus_param(icd, common_flags); |
| 375 | if (ret < 0) |
| 376 | return ret; |
| 377 | |
| 378 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { |
| 379 | case SOCAM_DATAWIDTH_8: |
| 380 | buswidth = 8; |
| 381 | break; |
| 382 | case SOCAM_DATAWIDTH_16: |
| 383 | buswidth = 16; |
| 384 | break; |
| 385 | default: |
| 386 | return -EINVAL; |
| 387 | } |
| 388 | |
| 389 | ceu_write(pcdev, CRCNTR, 0); |
| 390 | ceu_write(pcdev, CRCMPR, 0); |
| 391 | |
| 392 | value = 0x00000010; |
| 393 | value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0; |
| 394 | value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0; |
| 395 | value |= (buswidth == 16) ? (1 << 12) : 0; |
| 396 | ceu_write(pcdev, CAMCR, value); |
| 397 | |
| 398 | ceu_write(pcdev, CAPCR, 0x00300000); |
| 399 | ceu_write(pcdev, CAIFR, 0); |
| 400 | |
| 401 | mdelay(1); |
| 402 | |
| 403 | width = icd->width * (icd->current_fmt->depth / 8); |
| 404 | width = (buswidth == 16) ? width / 2 : width; |
| 405 | cfszr_width = (buswidth == 8) ? width / 2 : width; |
| 406 | cdwdr_width = (buswidth == 16) ? width * 2 : width; |
| 407 | |
| 408 | ceu_write(pcdev, CAMOR, 0); |
| 409 | ceu_write(pcdev, CAPWR, (icd->height << 16) | width); |
| 410 | ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */ |
| 411 | ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width); |
| 412 | ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */ |
Magnus Damm | dd54203 | 2008-10-16 19:50:22 -0300 | [diff] [blame] | 413 | |
| 414 | /* A few words about byte order (observed in Big Endian mode) |
| 415 | * |
| 416 | * In data fetch mode bytes are received in chunks of 8 bytes. |
| 417 | * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) |
| 418 | * |
| 419 | * The data is however by default written to memory in reverse order: |
| 420 | * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) |
| 421 | * |
| 422 | * The lowest three bits of CDOCR allows us to do swapping, |
Magnus Damm | 2c0a072 | 2008-10-16 19:50:56 -0300 | [diff] [blame] | 423 | * using 7 we swap the data bytes to match the incoming order: |
| 424 | * D0, D1, D2, D3, D4, D5, D6, D7 |
Magnus Damm | dd54203 | 2008-10-16 19:50:22 -0300 | [diff] [blame] | 425 | */ |
Magnus Damm | 2c0a072 | 2008-10-16 19:50:56 -0300 | [diff] [blame] | 426 | ceu_write(pcdev, CDOCR, 0x00000017); |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 427 | |
| 428 | ceu_write(pcdev, CDWDR, cdwdr_width); |
| 429 | ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ |
| 430 | |
| 431 | /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ |
| 432 | /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */ |
| 433 | |
| 434 | return 0; |
| 435 | } |
| 436 | |
| 437 | static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd, |
| 438 | __u32 pixfmt) |
| 439 | { |
| 440 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 441 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 442 | unsigned long camera_flags, common_flags; |
| 443 | |
| 444 | camera_flags = icd->ops->query_bus_param(icd); |
| 445 | common_flags = soc_camera_bus_param_compatible(camera_flags, |
| 446 | pcdev->pdata->flags); |
| 447 | if (!common_flags) |
| 448 | return -EINVAL; |
| 449 | |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | static int sh_mobile_ceu_set_fmt_cap(struct soc_camera_device *icd, |
| 454 | __u32 pixfmt, struct v4l2_rect *rect) |
| 455 | { |
| 456 | return icd->ops->set_fmt_cap(icd, pixfmt, rect); |
| 457 | } |
| 458 | |
| 459 | static int sh_mobile_ceu_try_fmt_cap(struct soc_camera_device *icd, |
| 460 | struct v4l2_format *f) |
| 461 | { |
Guennadi Liakhovetski | a2c8c68 | 2008-12-01 09:44:53 -0300 | [diff] [blame^] | 462 | int ret = sh_mobile_ceu_try_bus_param(icd, f->fmt.pix.pixelformat); |
| 463 | |
| 464 | if (ret < 0) |
| 465 | return ret; |
| 466 | |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 467 | /* FIXME: calculate using depth and bus width */ |
| 468 | |
| 469 | if (f->fmt.pix.height < 4) |
| 470 | f->fmt.pix.height = 4; |
| 471 | if (f->fmt.pix.height > 1920) |
| 472 | f->fmt.pix.height = 1920; |
| 473 | if (f->fmt.pix.width < 2) |
| 474 | f->fmt.pix.width = 2; |
| 475 | if (f->fmt.pix.width > 2560) |
| 476 | f->fmt.pix.width = 2560; |
| 477 | f->fmt.pix.width &= ~0x01; |
| 478 | f->fmt.pix.height &= ~0x03; |
| 479 | |
| 480 | /* limit to sensor capabilities */ |
| 481 | return icd->ops->try_fmt_cap(icd, f); |
| 482 | } |
| 483 | |
| 484 | static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf, |
| 485 | struct v4l2_requestbuffers *p) |
| 486 | { |
| 487 | int i; |
| 488 | |
| 489 | /* This is for locking debugging only. I removed spinlocks and now I |
| 490 | * check whether .prepare is ever called on a linked buffer, or whether |
| 491 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now |
| 492 | * it hadn't triggered */ |
| 493 | for (i = 0; i < p->count; i++) { |
| 494 | struct sh_mobile_ceu_buffer *buf; |
| 495 | |
| 496 | buf = container_of(icf->vb_vidq.bufs[i], |
| 497 | struct sh_mobile_ceu_buffer, vb); |
| 498 | INIT_LIST_HEAD(&buf->vb.queue); |
| 499 | } |
| 500 | |
| 501 | return 0; |
| 502 | } |
| 503 | |
| 504 | static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) |
| 505 | { |
| 506 | struct soc_camera_file *icf = file->private_data; |
| 507 | struct sh_mobile_ceu_buffer *buf; |
| 508 | |
| 509 | buf = list_entry(icf->vb_vidq.stream.next, |
| 510 | struct sh_mobile_ceu_buffer, vb.stream); |
| 511 | |
| 512 | poll_wait(file, &buf->vb.done, pt); |
| 513 | |
| 514 | if (buf->vb.state == VIDEOBUF_DONE || |
| 515 | buf->vb.state == VIDEOBUF_ERROR) |
| 516 | return POLLIN|POLLRDNORM; |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | static int sh_mobile_ceu_querycap(struct soc_camera_host *ici, |
| 522 | struct v4l2_capability *cap) |
| 523 | { |
| 524 | strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); |
| 525 | cap->version = KERNEL_VERSION(0, 0, 5); |
| 526 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q, |
| 531 | struct soc_camera_device *icd) |
| 532 | { |
| 533 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 534 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
| 535 | |
| 536 | videobuf_queue_dma_contig_init(q, |
| 537 | &sh_mobile_ceu_videobuf_ops, |
| 538 | &ici->dev, &pcdev->lock, |
| 539 | V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| 540 | V4L2_FIELD_NONE, |
| 541 | sizeof(struct sh_mobile_ceu_buffer), |
| 542 | icd); |
| 543 | } |
| 544 | |
| 545 | static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { |
| 546 | .owner = THIS_MODULE, |
| 547 | .add = sh_mobile_ceu_add_device, |
| 548 | .remove = sh_mobile_ceu_remove_device, |
| 549 | .set_fmt_cap = sh_mobile_ceu_set_fmt_cap, |
| 550 | .try_fmt_cap = sh_mobile_ceu_try_fmt_cap, |
| 551 | .reqbufs = sh_mobile_ceu_reqbufs, |
| 552 | .poll = sh_mobile_ceu_poll, |
| 553 | .querycap = sh_mobile_ceu_querycap, |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 554 | .set_bus_param = sh_mobile_ceu_set_bus_param, |
| 555 | .init_videobuf = sh_mobile_ceu_init_videobuf, |
| 556 | }; |
| 557 | |
| 558 | static int sh_mobile_ceu_probe(struct platform_device *pdev) |
| 559 | { |
| 560 | struct sh_mobile_ceu_dev *pcdev; |
| 561 | struct resource *res; |
| 562 | void __iomem *base; |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 563 | char clk_name[8]; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 564 | unsigned int irq; |
| 565 | int err = 0; |
| 566 | |
| 567 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 568 | irq = platform_get_irq(pdev, 0); |
| 569 | if (!res || !irq) { |
| 570 | dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); |
| 571 | err = -ENODEV; |
| 572 | goto exit; |
| 573 | } |
| 574 | |
| 575 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); |
| 576 | if (!pcdev) { |
| 577 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
| 578 | err = -ENOMEM; |
| 579 | goto exit; |
| 580 | } |
| 581 | |
| 582 | platform_set_drvdata(pdev, pcdev); |
| 583 | INIT_LIST_HEAD(&pcdev->capture); |
| 584 | spin_lock_init(&pcdev->lock); |
| 585 | |
| 586 | pcdev->pdata = pdev->dev.platform_data; |
| 587 | if (!pcdev->pdata) { |
| 588 | err = -EINVAL; |
| 589 | dev_err(&pdev->dev, "CEU platform data not set.\n"); |
| 590 | goto exit_kfree; |
| 591 | } |
| 592 | |
| 593 | base = ioremap_nocache(res->start, res->end - res->start + 1); |
| 594 | if (!base) { |
| 595 | err = -ENXIO; |
| 596 | dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); |
| 597 | goto exit_kfree; |
| 598 | } |
| 599 | |
| 600 | pcdev->irq = irq; |
| 601 | pcdev->base = base; |
| 602 | pcdev->video_limit = 0; /* only enabled if second resource exists */ |
| 603 | pcdev->dev = &pdev->dev; |
| 604 | |
| 605 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| 606 | if (res) { |
| 607 | err = dma_declare_coherent_memory(&pdev->dev, res->start, |
| 608 | res->start, |
| 609 | (res->end - res->start) + 1, |
| 610 | DMA_MEMORY_MAP | |
| 611 | DMA_MEMORY_EXCLUSIVE); |
| 612 | if (!err) { |
| 613 | dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); |
| 614 | err = -ENXIO; |
| 615 | goto exit_iounmap; |
| 616 | } |
| 617 | |
| 618 | pcdev->video_limit = (res->end - res->start) + 1; |
| 619 | } |
| 620 | |
| 621 | /* request irq */ |
| 622 | err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, |
Kay Sievers | af128a1 | 2008-10-30 00:51:46 -0300 | [diff] [blame] | 623 | dev_name(&pdev->dev), pcdev); |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 624 | if (err) { |
| 625 | dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); |
| 626 | goto exit_release_mem; |
| 627 | } |
| 628 | |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 629 | snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id); |
| 630 | pcdev->clk = clk_get(&pdev->dev, clk_name); |
| 631 | if (IS_ERR(pcdev->clk)) { |
| 632 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); |
| 633 | err = PTR_ERR(pcdev->clk); |
| 634 | goto exit_free_irq; |
| 635 | } |
| 636 | |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 637 | pcdev->ici.priv = pcdev; |
| 638 | pcdev->ici.dev.parent = &pdev->dev; |
| 639 | pcdev->ici.nr = pdev->id; |
Kay Sievers | af128a1 | 2008-10-30 00:51:46 -0300 | [diff] [blame] | 640 | pcdev->ici.drv_name = dev_name(&pdev->dev); |
| 641 | pcdev->ici.ops = &sh_mobile_ceu_host_ops; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 642 | |
| 643 | err = soc_camera_host_register(&pcdev->ici); |
| 644 | if (err) |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 645 | goto exit_free_clk; |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 646 | |
| 647 | return 0; |
| 648 | |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 649 | exit_free_clk: |
| 650 | clk_put(pcdev->clk); |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 651 | exit_free_irq: |
| 652 | free_irq(pcdev->irq, pcdev); |
| 653 | exit_release_mem: |
| 654 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) |
| 655 | dma_release_declared_memory(&pdev->dev); |
| 656 | exit_iounmap: |
| 657 | iounmap(base); |
| 658 | exit_kfree: |
| 659 | kfree(pcdev); |
| 660 | exit: |
| 661 | return err; |
| 662 | } |
| 663 | |
| 664 | static int sh_mobile_ceu_remove(struct platform_device *pdev) |
| 665 | { |
| 666 | struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev); |
| 667 | |
| 668 | soc_camera_host_unregister(&pcdev->ici); |
Magnus Damm | a42b6dd | 2008-10-31 20:21:44 +0900 | [diff] [blame] | 669 | clk_put(pcdev->clk); |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 670 | free_irq(pcdev->irq, pcdev); |
| 671 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) |
| 672 | dma_release_declared_memory(&pdev->dev); |
| 673 | iounmap(pcdev->base); |
| 674 | kfree(pcdev); |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | static struct platform_driver sh_mobile_ceu_driver = { |
| 679 | .driver = { |
| 680 | .name = "sh_mobile_ceu", |
| 681 | }, |
| 682 | .probe = sh_mobile_ceu_probe, |
| 683 | .remove = sh_mobile_ceu_remove, |
| 684 | }; |
| 685 | |
| 686 | static int __init sh_mobile_ceu_init(void) |
| 687 | { |
| 688 | return platform_driver_register(&sh_mobile_ceu_driver); |
| 689 | } |
| 690 | |
| 691 | static void __exit sh_mobile_ceu_exit(void) |
| 692 | { |
Paul Mundt | 01c1e4c | 2008-08-01 19:48:51 -0300 | [diff] [blame] | 693 | platform_driver_unregister(&sh_mobile_ceu_driver); |
Magnus Damm | 0d3244d | 2008-07-16 22:59:28 -0300 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | module_init(sh_mobile_ceu_init); |
| 697 | module_exit(sh_mobile_ceu_exit); |
| 698 | |
| 699 | MODULE_DESCRIPTION("SuperH Mobile CEU driver"); |
| 700 | MODULE_AUTHOR("Magnus Damm"); |
| 701 | MODULE_LICENSE("GPL"); |