V4L/DVB (8362): gspca: Bad offset of the brightness sum in sn9c103 packets.
[linux-2.6] / drivers / media / video / sh_mobile_ceu_camera.c
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>
34
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-dev.h>
37 #include <media/soc_camera.h>
38 #include <media/sh_mobile_ceu.h>
39 #include <media/videobuf-dma-contig.h>
40
41 /* register offsets for sh7722 / sh7723 */
42
43 #define CAPSR  0x00
44 #define CAPCR  0x04
45 #define CAMCR  0x08
46 #define CMCYR  0x0c
47 #define CAMOR  0x10
48 #define CAPWR  0x14
49 #define CAIFR  0x18
50 #define CSTCR  0x20 /* not on sh7723 */
51 #define CSECR  0x24 /* not on sh7723 */
52 #define CRCNTR 0x28
53 #define CRCMPR 0x2c
54 #define CFLCR  0x30
55 #define CFSZR  0x34
56 #define CDWDR  0x38
57 #define CDAYR  0x3c
58 #define CDACR  0x40
59 #define CDBYR  0x44
60 #define CDBCR  0x48
61 #define CBDSR  0x4c
62 #define CFWCR  0x5c
63 #define CLFCR  0x60
64 #define CDOCR  0x64
65 #define CDDCR  0x68
66 #define CDDAR  0x6c
67 #define CEIER  0x70
68 #define CETCR  0x74
69 #define CSTSR  0x7c
70 #define CSRTR  0x80
71 #define CDSSR  0x84
72 #define CDAYR2 0x90
73 #define CDACR2 0x94
74 #define CDBYR2 0x98
75 #define CDBCR2 0x9c
76
77 static DEFINE_MUTEX(camera_lock);
78
79 /* per video frame buffer */
80 struct sh_mobile_ceu_buffer {
81         struct videobuf_buffer vb; /* v4l buffer must be first */
82         const struct soc_camera_data_format *fmt;
83 };
84
85 struct sh_mobile_ceu_dev {
86         struct device *dev;
87         struct soc_camera_host ici;
88         struct soc_camera_device *icd;
89
90         unsigned int irq;
91         void __iomem *base;
92         unsigned long video_limit;
93
94         spinlock_t lock;
95         struct list_head capture;
96         struct videobuf_buffer *active;
97
98         struct sh_mobile_ceu_info *pdata;
99 };
100
101 static void ceu_write(struct sh_mobile_ceu_dev *priv,
102                       unsigned long reg_offs, unsigned long data)
103 {
104         iowrite32(data, priv->base + reg_offs);
105 }
106
107 static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv,
108                               unsigned long reg_offs)
109 {
110         return ioread32(priv->base + reg_offs);
111 }
112
113 /*
114  *  Videobuf operations
115  */
116 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
117                                         unsigned int *count,
118                                         unsigned int *size)
119 {
120         struct soc_camera_device *icd = vq->priv_data;
121         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
122         struct sh_mobile_ceu_dev *pcdev = ici->priv;
123         int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
124
125         *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
126
127         if (0 == *count)
128                 *count = 2;
129
130         if (pcdev->video_limit) {
131                 while (*size * *count > pcdev->video_limit)
132                         (*count)--;
133         }
134
135         dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
136
137         return 0;
138 }
139
140 static void free_buffer(struct videobuf_queue *vq,
141                         struct sh_mobile_ceu_buffer *buf)
142 {
143         struct soc_camera_device *icd = vq->priv_data;
144
145         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
146                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
147
148         if (in_interrupt())
149                 BUG();
150
151         videobuf_dma_contig_free(vq, &buf->vb);
152         dev_dbg(&icd->dev, "%s freed\n", __func__);
153         buf->vb.state = VIDEOBUF_NEEDS_INIT;
154 }
155
156 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
157 {
158         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
159         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
160         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
161
162         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000);
163
164         ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
165
166         if (pcdev->active) {
167                 ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active));
168                 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
169         }
170 }
171
172 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
173                                           struct videobuf_buffer *vb,
174                                           enum v4l2_field field)
175 {
176         struct soc_camera_device *icd = vq->priv_data;
177         struct sh_mobile_ceu_buffer *buf;
178         int ret;
179
180         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
181
182         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
183                 vb, vb->baddr, vb->bsize);
184
185         /* Added list head initialization on alloc */
186         WARN_ON(!list_empty(&vb->queue));
187
188 #ifdef DEBUG
189         /* This can be useful if you want to see if we actually fill
190          * the buffer with something */
191         memset((void *)vb->baddr, 0xaa, vb->bsize);
192 #endif
193
194         BUG_ON(NULL == icd->current_fmt);
195
196         if (buf->fmt    != icd->current_fmt ||
197             vb->width   != icd->width ||
198             vb->height  != icd->height ||
199             vb->field   != field) {
200                 buf->fmt        = icd->current_fmt;
201                 vb->width       = icd->width;
202                 vb->height      = icd->height;
203                 vb->field       = field;
204                 vb->state       = VIDEOBUF_NEEDS_INIT;
205         }
206
207         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
208         if (0 != vb->baddr && vb->bsize < vb->size) {
209                 ret = -EINVAL;
210                 goto out;
211         }
212
213         if (vb->state == VIDEOBUF_NEEDS_INIT) {
214                 ret = videobuf_iolock(vq, vb, NULL);
215                 if (ret)
216                         goto fail;
217                 vb->state = VIDEOBUF_PREPARED;
218         }
219
220         return 0;
221 fail:
222         free_buffer(vq, buf);
223 out:
224         return ret;
225 }
226
227 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
228                                          struct videobuf_buffer *vb)
229 {
230         struct soc_camera_device *icd = vq->priv_data;
231         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
232         struct sh_mobile_ceu_dev *pcdev = ici->priv;
233         unsigned long flags;
234
235         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
236                 vb, vb->baddr, vb->bsize);
237
238         vb->state = VIDEOBUF_ACTIVE;
239         spin_lock_irqsave(&pcdev->lock, flags);
240         list_add_tail(&vb->queue, &pcdev->capture);
241
242         if (!pcdev->active) {
243                 pcdev->active = vb;
244                 sh_mobile_ceu_capture(pcdev);
245         }
246
247         spin_unlock_irqrestore(&pcdev->lock, flags);
248 }
249
250 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
251                                            struct videobuf_buffer *vb)
252 {
253         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
254 }
255
256 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
257         .buf_setup      = sh_mobile_ceu_videobuf_setup,
258         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
259         .buf_queue      = sh_mobile_ceu_videobuf_queue,
260         .buf_release    = sh_mobile_ceu_videobuf_release,
261 };
262
263 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
264 {
265         struct sh_mobile_ceu_dev *pcdev = data;
266         struct videobuf_buffer *vb;
267         unsigned long flags;
268
269         spin_lock_irqsave(&pcdev->lock, flags);
270
271         vb = pcdev->active;
272         list_del_init(&vb->queue);
273
274         if (!list_empty(&pcdev->capture))
275                 pcdev->active = list_entry(pcdev->capture.next,
276                                            struct videobuf_buffer, queue);
277         else
278                 pcdev->active = NULL;
279
280         sh_mobile_ceu_capture(pcdev);
281
282         vb->state = VIDEOBUF_DONE;
283         do_gettimeofday(&vb->ts);
284         vb->field_count++;
285         wake_up(&vb->done);
286         spin_unlock_irqrestore(&pcdev->lock, flags);
287
288         return IRQ_HANDLED;
289 }
290
291 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
292 {
293         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
294         struct sh_mobile_ceu_dev *pcdev = ici->priv;
295         int ret = -EBUSY;
296
297         mutex_lock(&camera_lock);
298
299         if (pcdev->icd)
300                 goto err;
301
302         dev_info(&icd->dev,
303                  "SuperH Mobile CEU driver attached to camera %d\n",
304                  icd->devnum);
305
306         if (pcdev->pdata->enable_camera)
307                 pcdev->pdata->enable_camera();
308
309         ret = icd->ops->init(icd);
310         if (ret)
311                 goto err;
312
313         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
314         while (ceu_read(pcdev, CSTSR) & 1)
315                 msleep(1);
316
317         pcdev->icd = icd;
318 err:
319         mutex_unlock(&camera_lock);
320
321         return ret;
322 }
323
324 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
325 {
326         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
327         struct sh_mobile_ceu_dev *pcdev = ici->priv;
328
329         BUG_ON(icd != pcdev->icd);
330
331         /* disable capture, disable interrupts */
332         ceu_write(pcdev, CEIER, 0);
333         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
334         icd->ops->release(icd);
335         if (pcdev->pdata->disable_camera)
336                 pcdev->pdata->disable_camera();
337
338         dev_info(&icd->dev,
339                  "SuperH Mobile CEU driver detached from camera %d\n",
340                  icd->devnum);
341
342         pcdev->icd = NULL;
343 }
344
345 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
346                                        __u32 pixfmt)
347 {
348         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
349         struct sh_mobile_ceu_dev *pcdev = ici->priv;
350         int ret, buswidth, width, cfszr_width, cdwdr_width;
351         unsigned long camera_flags, common_flags, value;
352
353         camera_flags = icd->ops->query_bus_param(icd);
354         common_flags = soc_camera_bus_param_compatible(camera_flags,
355                                                        pcdev->pdata->flags);
356         if (!common_flags)
357                 return -EINVAL;
358
359         ret = icd->ops->set_bus_param(icd, common_flags);
360         if (ret < 0)
361                 return ret;
362
363         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
364         case SOCAM_DATAWIDTH_8:
365                 buswidth = 8;
366                 break;
367         case SOCAM_DATAWIDTH_16:
368                 buswidth = 16;
369                 break;
370         default:
371                 return -EINVAL;
372         }
373
374         ceu_write(pcdev, CRCNTR, 0);
375         ceu_write(pcdev, CRCMPR, 0);
376
377         value = 0x00000010;
378         value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
379         value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
380         value |= (buswidth == 16) ? (1 << 12) : 0;
381         ceu_write(pcdev, CAMCR, value);
382
383         ceu_write(pcdev, CAPCR, 0x00300000);
384         ceu_write(pcdev, CAIFR, 0);
385
386         mdelay(1);
387
388         width = icd->width * (icd->current_fmt->depth / 8);
389         width = (buswidth == 16) ? width / 2 : width;
390         cfszr_width = (buswidth == 8) ? width / 2 : width;
391         cdwdr_width = (buswidth == 16) ? width * 2 : width;
392
393         ceu_write(pcdev, CAMOR, 0);
394         ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
395         ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */
396         ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
397         ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */
398         ceu_write(pcdev, CDOCR, 0x00000016);
399
400         ceu_write(pcdev, CDWDR, cdwdr_width);
401         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
402
403         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
404         /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */
405
406         return 0;
407 }
408
409 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
410                                        __u32 pixfmt)
411 {
412         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
413         struct sh_mobile_ceu_dev *pcdev = ici->priv;
414         unsigned long camera_flags, common_flags;
415
416         camera_flags = icd->ops->query_bus_param(icd);
417         common_flags = soc_camera_bus_param_compatible(camera_flags,
418                                                        pcdev->pdata->flags);
419         if (!common_flags)
420                 return -EINVAL;
421
422         return 0;
423 }
424
425 static int sh_mobile_ceu_set_fmt_cap(struct soc_camera_device *icd,
426                                      __u32 pixfmt, struct v4l2_rect *rect)
427 {
428         return icd->ops->set_fmt_cap(icd, pixfmt, rect);
429 }
430
431 static int sh_mobile_ceu_try_fmt_cap(struct soc_camera_device *icd,
432                                      struct v4l2_format *f)
433 {
434         /* FIXME: calculate using depth and bus width */
435
436         if (f->fmt.pix.height < 4)
437                 f->fmt.pix.height = 4;
438         if (f->fmt.pix.height > 1920)
439                 f->fmt.pix.height = 1920;
440         if (f->fmt.pix.width < 2)
441                 f->fmt.pix.width = 2;
442         if (f->fmt.pix.width > 2560)
443                 f->fmt.pix.width = 2560;
444         f->fmt.pix.width &= ~0x01;
445         f->fmt.pix.height &= ~0x03;
446
447         /* limit to sensor capabilities */
448         return icd->ops->try_fmt_cap(icd, f);
449 }
450
451 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
452                                  struct v4l2_requestbuffers *p)
453 {
454         int i;
455
456         /* This is for locking debugging only. I removed spinlocks and now I
457          * check whether .prepare is ever called on a linked buffer, or whether
458          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
459          * it hadn't triggered */
460         for (i = 0; i < p->count; i++) {
461                 struct sh_mobile_ceu_buffer *buf;
462
463                 buf = container_of(icf->vb_vidq.bufs[i],
464                                    struct sh_mobile_ceu_buffer, vb);
465                 INIT_LIST_HEAD(&buf->vb.queue);
466         }
467
468         return 0;
469 }
470
471 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
472 {
473         struct soc_camera_file *icf = file->private_data;
474         struct sh_mobile_ceu_buffer *buf;
475
476         buf = list_entry(icf->vb_vidq.stream.next,
477                          struct sh_mobile_ceu_buffer, vb.stream);
478
479         poll_wait(file, &buf->vb.done, pt);
480
481         if (buf->vb.state == VIDEOBUF_DONE ||
482             buf->vb.state == VIDEOBUF_ERROR)
483                 return POLLIN|POLLRDNORM;
484
485         return 0;
486 }
487
488 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
489                                   struct v4l2_capability *cap)
490 {
491         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
492         cap->version = KERNEL_VERSION(0, 0, 5);
493         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
494         return 0;
495 }
496
497 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
498                                         struct soc_camera_device *icd)
499 {
500         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
501         struct sh_mobile_ceu_dev *pcdev = ici->priv;
502
503         videobuf_queue_dma_contig_init(q,
504                                        &sh_mobile_ceu_videobuf_ops,
505                                        &ici->dev, &pcdev->lock,
506                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
507                                        V4L2_FIELD_NONE,
508                                        sizeof(struct sh_mobile_ceu_buffer),
509                                        icd);
510 }
511
512 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
513         .owner          = THIS_MODULE,
514         .add            = sh_mobile_ceu_add_device,
515         .remove         = sh_mobile_ceu_remove_device,
516         .set_fmt_cap    = sh_mobile_ceu_set_fmt_cap,
517         .try_fmt_cap    = sh_mobile_ceu_try_fmt_cap,
518         .reqbufs        = sh_mobile_ceu_reqbufs,
519         .poll           = sh_mobile_ceu_poll,
520         .querycap       = sh_mobile_ceu_querycap,
521         .try_bus_param  = sh_mobile_ceu_try_bus_param,
522         .set_bus_param  = sh_mobile_ceu_set_bus_param,
523         .init_videobuf  = sh_mobile_ceu_init_videobuf,
524 };
525
526 static int sh_mobile_ceu_probe(struct platform_device *pdev)
527 {
528         struct sh_mobile_ceu_dev *pcdev;
529         struct resource *res;
530         void __iomem *base;
531         unsigned int irq;
532         int err = 0;
533
534         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
535         irq = platform_get_irq(pdev, 0);
536         if (!res || !irq) {
537                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
538                 err = -ENODEV;
539                 goto exit;
540         }
541
542         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
543         if (!pcdev) {
544                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
545                 err = -ENOMEM;
546                 goto exit;
547         }
548
549         platform_set_drvdata(pdev, pcdev);
550         INIT_LIST_HEAD(&pcdev->capture);
551         spin_lock_init(&pcdev->lock);
552
553         pcdev->pdata = pdev->dev.platform_data;
554         if (!pcdev->pdata) {
555                 err = -EINVAL;
556                 dev_err(&pdev->dev, "CEU platform data not set.\n");
557                 goto exit_kfree;
558         }
559
560         base = ioremap_nocache(res->start, res->end - res->start + 1);
561         if (!base) {
562                 err = -ENXIO;
563                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
564                 goto exit_kfree;
565         }
566
567         pcdev->irq = irq;
568         pcdev->base = base;
569         pcdev->video_limit = 0; /* only enabled if second resource exists */
570         pcdev->dev = &pdev->dev;
571
572         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
573         if (res) {
574                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
575                                                   res->start,
576                                                   (res->end - res->start) + 1,
577                                                   DMA_MEMORY_MAP |
578                                                   DMA_MEMORY_EXCLUSIVE);
579                 if (!err) {
580                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
581                         err = -ENXIO;
582                         goto exit_iounmap;
583                 }
584
585                 pcdev->video_limit = (res->end - res->start) + 1;
586         }
587
588         /* request irq */
589         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
590                           pdev->dev.bus_id, pcdev);
591         if (err) {
592                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
593                 goto exit_release_mem;
594         }
595
596         pcdev->ici.priv = pcdev;
597         pcdev->ici.dev.parent = &pdev->dev;
598         pcdev->ici.nr = pdev->id;
599         pcdev->ici.drv_name = pdev->dev.bus_id,
600         pcdev->ici.ops = &sh_mobile_ceu_host_ops,
601
602         err = soc_camera_host_register(&pcdev->ici);
603         if (err)
604                 goto exit_free_irq;
605
606         return 0;
607
608 exit_free_irq:
609         free_irq(pcdev->irq, pcdev);
610 exit_release_mem:
611         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
612                 dma_release_declared_memory(&pdev->dev);
613 exit_iounmap:
614         iounmap(base);
615 exit_kfree:
616         kfree(pcdev);
617 exit:
618         return err;
619 }
620
621 static int sh_mobile_ceu_remove(struct platform_device *pdev)
622 {
623         struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
624
625         soc_camera_host_unregister(&pcdev->ici);
626         free_irq(pcdev->irq, pcdev);
627         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
628                 dma_release_declared_memory(&pdev->dev);
629         iounmap(pcdev->base);
630         kfree(pcdev);
631         return 0;
632 }
633
634 static struct platform_driver sh_mobile_ceu_driver = {
635         .driver         = {
636                 .name   = "sh_mobile_ceu",
637         },
638         .probe          = sh_mobile_ceu_probe,
639         .remove         = sh_mobile_ceu_remove,
640 };
641
642 static int __init sh_mobile_ceu_init(void)
643 {
644         return platform_driver_register(&sh_mobile_ceu_driver);
645 }
646
647 static void __exit sh_mobile_ceu_exit(void)
648 {
649         return platform_driver_unregister(&sh_mobile_ceu_driver);
650 }
651
652 module_init(sh_mobile_ceu_init);
653 module_exit(sh_mobile_ceu_exit);
654
655 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
656 MODULE_AUTHOR("Magnus Damm");
657 MODULE_LICENSE("GPL");