diff options
Diffstat (limited to 'drivers/media/video/sh_mobile_ceu_camera.c')
| -rw-r--r-- | drivers/media/video/sh_mobile_ceu_camera.c | 2331 |
1 files changed, 0 insertions, 2331 deletions
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c deleted file mode 100644 index 0baaf94db7e0..000000000000 --- a/drivers/media/video/sh_mobile_ceu_camera.c +++ /dev/null @@ -1,2331 +0,0 @@ -/* - * V4L2 Driver for SuperH Mobile CEU interface - * - * Copyright (C) 2008 Magnus Damm - * - * Based on V4L2 Driver for PXA camera host - "pxa_camera.c", - * - * Copyright (C) 2006, Sascha Hauer, Pengutronix - * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/completion.h> -#include <linux/delay.h> -#include <linux/dma-mapping.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/moduleparam.h> -#include <linux/time.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/videodev2.h> -#include <linux/pm_runtime.h> -#include <linux/sched.h> - -#include <media/v4l2-common.h> -#include <media/v4l2-dev.h> -#include <media/soc_camera.h> -#include <media/sh_mobile_ceu.h> -#include <media/sh_mobile_csi2.h> -#include <media/videobuf2-dma-contig.h> -#include <media/v4l2-mediabus.h> -#include <media/soc_mediabus.h> - -/* register offsets for sh7722 / sh7723 */ - -#define CAPSR 0x00 /* Capture start register */ -#define CAPCR 0x04 /* Capture control register */ -#define CAMCR 0x08 /* Capture interface control register */ -#define CMCYR 0x0c /* Capture interface cycle register */ -#define CAMOR 0x10 /* Capture interface offset register */ -#define CAPWR 0x14 /* Capture interface width register */ -#define CAIFR 0x18 /* Capture interface input format register */ -#define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */ -#define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */ -#define CRCNTR 0x28 /* CEU register control register */ -#define CRCMPR 0x2c /* CEU register forcible control register */ -#define CFLCR 0x30 /* Capture filter control register */ -#define CFSZR 0x34 /* Capture filter size clip register */ -#define CDWDR 0x38 /* Capture destination width register */ -#define CDAYR 0x3c /* Capture data address Y register */ -#define CDACR 0x40 /* Capture data address C register */ -#define CDBYR 0x44 /* Capture data bottom-field address Y register */ -#define CDBCR 0x48 /* Capture data bottom-field address C register */ -#define CBDSR 0x4c /* Capture bundle destination size register */ -#define CFWCR 0x5c /* Firewall operation control register */ -#define CLFCR 0x60 /* Capture low-pass filter control register */ -#define CDOCR 0x64 /* Capture data output control register */ -#define CDDCR 0x68 /* Capture data complexity level register */ -#define CDDAR 0x6c /* Capture data complexity level address register */ -#define CEIER 0x70 /* Capture event interrupt enable register */ -#define CETCR 0x74 /* Capture event flag clear register */ -#define CSTSR 0x7c /* Capture status register */ -#define CSRTR 0x80 /* Capture software reset register */ -#define CDSSR 0x84 /* Capture data size register */ -#define CDAYR2 0x90 /* Capture data address Y register 2 */ -#define CDACR2 0x94 /* Capture data address C register 2 */ -#define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */ -#define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */ - -#undef DEBUG_GEOMETRY -#ifdef DEBUG_GEOMETRY -#define dev_geo dev_info -#else -#define dev_geo dev_dbg -#endif - -/* per video frame buffer */ -struct sh_mobile_ceu_buffer { - struct vb2_buffer vb; /* v4l buffer must be first */ - struct list_head queue; -}; - -struct sh_mobile_ceu_dev { - struct soc_camera_host ici; - struct soc_camera_device *icd; - struct platform_device *csi2_pdev; - - unsigned int irq; - void __iomem *base; - size_t video_limit; - size_t buf_total; - - spinlock_t lock; /* Protects video buffer lists */ - struct list_head capture; - struct vb2_buffer *active; - struct vb2_alloc_ctx *alloc_ctx; - - struct sh_mobile_ceu_info *pdata; - struct completion complete; - - u32 cflcr; - - /* static max sizes either from platform data or default */ - int max_width; - int max_height; - - enum v4l2_field field; - int sequence; - - unsigned int image_mode:1; - unsigned int is_16bit:1; - unsigned int frozen:1; -}; - -struct sh_mobile_ceu_cam { - /* CEU offsets within the camera output, before the CEU scaler */ - unsigned int ceu_left; - unsigned int ceu_top; - /* Client output, as seen by the CEU */ - unsigned int width; - unsigned int height; - /* - * User window from S_CROP / G_CROP, produced by client cropping and - * scaling, CEU scaling and CEU cropping, mapped back onto the client - * input window - */ - struct v4l2_rect subrect; - /* Camera cropping rectangle */ - struct v4l2_rect rect; - const struct soc_mbus_pixelfmt *extra_fmt; - enum v4l2_mbus_pixelcode code; -}; - -static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb) -{ - return container_of(vb, struct sh_mobile_ceu_buffer, vb); -} - -static void ceu_write(struct sh_mobile_ceu_dev *priv, - unsigned long reg_offs, u32 data) -{ - iowrite32(data, priv->base + reg_offs); -} - -static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs) -{ - return ioread32(priv->base + reg_offs); -} - -static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev) -{ - int i, success = 0; - struct soc_camera_device *icd = pcdev->icd; - - ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ - - /* wait CSTSR.CPTON bit */ - for (i = 0; i < 1000; i++) { - if (!(ceu_read(pcdev, CSTSR) & 1)) { - success++; - break; - } - udelay(1); - } - - /* wait CAPSR.CPKIL bit */ - for (i = 0; i < 1000; i++) { - if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) { - success++; - break; - } - udelay(1); - } - - - if (2 != success) { - dev_warn(icd->pdev, "soft reset time out\n"); - return -EIO; - } - - return 0; -} - -/* - * Videobuf operations - */ - -/* - * .queue_setup() is called to check, whether the driver can accept the - * requested number of buffers and to fill in plane sizes - * for the current frame format if required - */ -static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq, - const struct v4l2_format *fmt, - unsigned int *count, unsigned int *num_planes, - unsigned int sizes[], void *alloc_ctxs[]) -{ - struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - - if (fmt) { - const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd, - fmt->fmt.pix.pixelformat); - unsigned int bytes_per_line; - int ret; - - if (!xlate) - return -EINVAL; - - ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width, - xlate->host_fmt); - if (ret < 0) - return ret; - - bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret); - - ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line, - fmt->fmt.pix.height); - if (ret < 0) - return ret; - - sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret); - } else { - /* Called from VIDIOC_REQBUFS or in compatibility mode */ - sizes[0] = icd->sizeimage; - } - - alloc_ctxs[0] = pcdev->alloc_ctx; - - if (!vq->num_buffers) - pcdev->sequence = 0; - - if (!*count) - *count = 2; - - /* If *num_planes != 0, we have already verified *count. */ - if (pcdev->video_limit && !*num_planes) { - size_t size = PAGE_ALIGN(sizes[0]) * *count; - - if (size + pcdev->buf_total > pcdev->video_limit) - *count = (pcdev->video_limit - pcdev->buf_total) / - PAGE_ALIGN(sizes[0]); - } - - *num_planes = 1; - - dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]); - - return 0; -} - -#define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */ -#define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */ -#define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */ -#define CEU_CEIER_VBP (1 << 20) /* vbp error */ -#define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */ -#define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP) - - -/* - * return value doesn't reflex the success/failure to queue the new buffer, - * but rather the status of the previous buffer. - */ -static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) -{ - struct soc_camera_device *icd = pcdev->icd; - dma_addr_t phys_addr_top, phys_addr_bottom; - unsigned long top1, top2; - unsigned long bottom1, bottom2; - u32 status; - bool planar; - int ret = 0; - - /* - * The hardware is _very_ picky about this sequence. Especially - * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge - * several not-so-well documented interrupt sources in CETCR. - */ - ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK); - status = ceu_read(pcdev, CETCR); - ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC); - if (!pcdev->frozen) - ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK); - ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP); - ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW); - - /* - * When a VBP interrupt occurs, a capture end interrupt does not occur - * and the image of that frame is not captured correctly. So, soft reset - * is needed here. - */ - if (status & CEU_CEIER_VBP) { - sh_mobile_ceu_soft_reset(pcdev); - ret = -EIO; - } - - if (pcdev->frozen) { - complete(&pcdev->complete); - return ret; - } - - if (!pcdev->active) - return ret; - - if (V4L2_FIELD_INTERLACED_BT == pcdev->field) { - top1 = CDBYR; - top2 = CDBCR; - bottom1 = CDAYR; - bottom2 = CDACR; - } else { - top1 = CDAYR; - top2 = CDACR; - bottom1 = CDBYR; - bottom2 = CDBCR; - } - - phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0); - - switch (icd->current_fmt->host_fmt->fourcc) { - case V4L2_PIX_FMT_NV12: - case V4L2_PIX_FMT_NV21: - case V4L2_PIX_FMT_NV16: - case V4L2_PIX_FMT_NV61: - planar = true; - break; - default: - planar = false; - } - - ceu_write(pcdev, top1, phys_addr_top); - if (V4L2_FIELD_NONE != pcdev->field) { - phys_addr_bottom = phys_addr_top + icd->bytesperline; - ceu_write(pcdev, bottom1, phys_addr_bottom); - } - - if (planar) { - phys_addr_top += icd->bytesperline * icd->user_height; - ceu_write(pcdev, top2, phys_addr_top); - if (V4L2_FIELD_NONE != pcdev->field) { - phys_addr_bottom = phys_addr_top + icd->bytesperline; - ceu_write(pcdev, bottom2, phys_addr_bottom); - } - } - - ceu_write(pcdev, CAPSR, 0x1); /* start capture */ - - return ret; -} - -static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb) -{ - struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); - - /* Added list head initialization on alloc */ - WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb); - - return 0; -} - -static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb) -{ - struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); - unsigned long size; - - size = icd->sizeimage; - - if (vb2_plane_size(vb, 0) < size) { - dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n", - vb->v4l2_buf.index, vb2_plane_size(vb, 0), size); - goto error; - } - - vb2_set_plane_payload(vb, 0, size); - - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, - vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); - -#ifdef DEBUG - /* - * This can be useful if you want to see if we actually fill - * the buffer with something - */ - if (vb2_plane_vaddr(vb, 0)) - memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0)); -#endif - - spin_lock_irq(&pcdev->lock); - list_add_tail(&buf->queue, &pcdev->capture); - - if (!pcdev->active) { - /* - * Because there were no active buffer at this moment, - * we are not interested in the return value of - * sh_mobile_ceu_capture here. - */ - pcdev->active = vb; - sh_mobile_ceu_capture(pcdev); - } - spin_unlock_irq(&pcdev->lock); - - return; - -error: - vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); -} - -static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb) -{ - struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - - spin_lock_irq(&pcdev->lock); - - if (pcdev->active == vb) { - /* disable capture (release DMA buffer), reset */ - ceu_write(pcdev, CAPSR, 1 << 16); - pcdev->active = NULL; - } - - /* - * Doesn't hurt also if the list is empty, but it hurts, if queuing the - * buffer failed, and .buf_init() hasn't been called - */ - if (buf->queue.next) - list_del_init(&buf->queue); - - pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0)); - dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__, - pcdev->buf_total); - - spin_unlock_irq(&pcdev->lock); -} - -static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb) -{ - struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - - pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0)); - dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__, - pcdev->buf_total); - - /* This is for locking debugging only */ - INIT_LIST_HEAD(&to_ceu_vb(vb)->queue); - return 0; -} - -static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q) -{ - struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct list_head *buf_head, *tmp; - - spin_lock_irq(&pcdev->lock); - - pcdev->active = NULL; - - list_for_each_safe(buf_head, tmp, &pcdev->capture) - list_del_init(buf_head); - - spin_unlock_irq(&pcdev->lock); - - return sh_mobile_ceu_soft_reset(pcdev); -} - -static struct vb2_ops sh_mobile_ceu_videobuf_ops = { - .queue_setup = sh_mobile_ceu_videobuf_setup, - .buf_prepare = sh_mobile_ceu_videobuf_prepare, - .buf_queue = sh_mobile_ceu_videobuf_queue, - .buf_cleanup = sh_mobile_ceu_videobuf_release, - .buf_init = sh_mobile_ceu_videobuf_init, - .wait_prepare = soc_camera_unlock, - .wait_finish = soc_camera_lock, - .stop_streaming = sh_mobile_ceu_stop_streaming, -}; - -static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) -{ - struct sh_mobile_ceu_dev *pcdev = data; - struct vb2_buffer *vb; - int ret; - - spin_lock(&pcdev->lock); - - vb = pcdev->active; - if (!vb) - /* Stale interrupt from a released buffer */ - goto out; - - list_del_init(&to_ceu_vb(vb)->queue); - - if (!list_empty(&pcdev->capture)) - pcdev->active = &list_entry(pcdev->capture.next, - struct sh_mobile_ceu_buffer, queue)->vb; - else - pcdev->active = NULL; - - ret = sh_mobile_ceu_capture(pcdev); - do_gettimeofday(&vb->v4l2_buf.timestamp); - if (!ret) { - vb->v4l2_buf.field = pcdev->field; - vb->v4l2_buf.sequence = pcdev->sequence++; - } - vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); - -out: - spin_unlock(&pcdev->lock); - - return IRQ_HANDLED; -} - -static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev) -{ - struct v4l2_subdev *sd; - - if (!pcdev->csi2_pdev) - return NULL; - - v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev) - if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd)) - return sd; - - return NULL; -} - -/* Called with .video_lock held */ -static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct v4l2_subdev *csi2_sd; - int ret; - - if (pcdev->icd) - return -EBUSY; - - dev_info(icd->parent, - "SuperH Mobile CEU driver attached to camera %d\n", - icd->devnum); - - pm_runtime_get_sync(ici->v4l2_dev.dev); - - pcdev->buf_total = 0; - - ret = sh_mobile_ceu_soft_reset(pcdev); - - csi2_sd = find_csi2(pcdev); - if (csi2_sd) { - csi2_sd->grp_id = soc_camera_grp_id(icd); - v4l2_set_subdev_hostdata(csi2_sd, icd); - } - - ret = v4l2_subdev_call(csi2_sd, core, s_power, 1); - if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) { - pm_runtime_put_sync(ici->v4l2_dev.dev); - return ret; - } - - /* - * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver - * has not found this soc-camera device among its clients - */ - if (ret == -ENODEV && csi2_sd) - csi2_sd->grp_id = 0; - pcdev->icd = icd; - - return 0; -} - -/* Called with .video_lock held */ -static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct v4l2_subdev *csi2_sd = find_csi2(pcdev); - - BUG_ON(icd != pcdev->icd); - - v4l2_subdev_call(csi2_sd, core, s_power, 0); - if (csi2_sd) - csi2_sd->grp_id = 0; - /* disable capture, disable interrupts */ - ceu_write(pcdev, CEIER, 0); - sh_mobile_ceu_soft_reset(pcdev); - - /* make sure active buffer is canceled */ - spin_lock_irq(&pcdev->lock); - if (pcdev->active) { - list_del_init(&to_ceu_vb(pcdev->active)->queue); - vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR); - pcdev->active = NULL; - } - spin_unlock_irq(&pcdev->lock); - - pm_runtime_put_sync(ici->v4l2_dev.dev); - - dev_info(icd->parent, - "SuperH Mobile CEU driver detached from camera %d\n", - icd->devnum); - - pcdev->icd = NULL; -} - -/* - * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)" - * in SH7722 Hardware Manual - */ -static unsigned int size_dst(unsigned int src, unsigned int scale) -{ - unsigned int mant_pre = scale >> 12; - if (!src || !scale) - return src; - return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) * - mant_pre * 4096 / scale + 1; -} - -static u16 calc_scale(unsigned int src, unsigned int *dst) -{ - u16 scale; - - if (src == *dst) - return 0; - - scale = (src * 4096 / *dst) & ~7; - - while (scale > 4096 && size_dst(src, scale) < *dst) - scale -= 8; - - *dst = size_dst(src, scale); - - return scale; -} - -/* rect is guaranteed to not exceed the scaled camera rectangle */ -static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct sh_mobile_ceu_dev *pcdev = ici->priv; - unsigned int height, width, cdwdr_width, in_width, in_height; - unsigned int left_offset, top_offset; - u32 camor; - - dev_geo(icd->parent, "Crop %ux%u@%u:%u\n", - icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top); - - left_offset = cam->ceu_left; - top_offset = cam->ceu_top; - - WARN_ON(icd->user_width & 3 || icd->user_height & 3); - - width = icd->user_width; - - if (pcdev->image_mode) { - in_width = cam->width; - if (!pcdev->is_16bit) { - in_width *= 2; - left_offset *= 2; - } - } else { - unsigned int w_factor; - - switch (icd->current_fmt->host_fmt->packing) { - case SOC_MBUS_PACKING_2X8_PADHI: - w_factor = 2; - break; - default: - w_factor = 1; - } - - in_width = cam->width * w_factor; - left_offset *= w_factor; - } - - cdwdr_width = icd->bytesperline; - - height = icd->user_height; - in_height = cam->height; - if (V4L2_FIELD_NONE != pcdev->field) { - height = (height / 2) & ~3; - in_height /= 2; - top_offset /= 2; - cdwdr_width *= 2; - } - - /* CSI2 special configuration */ - if (pcdev->pdata->csi2) { - in_width = ((in_width - 2) * 2); - left_offset *= 2; - } - - /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */ - camor = left_offset | (top_offset << 16); - - dev_geo(icd->parent, - "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor, - (in_height << 16) | in_width, (height << 16) | width, - cdwdr_width); - - ceu_write(pcdev, CAMOR, camor); - ceu_write(pcdev, CAPWR, (in_height << 16) | in_width); - /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */ - ceu_write(pcdev, CFSZR, (height << 16) | width); - ceu_write(pcdev, CDWDR, cdwdr_width); -} - -static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev) -{ - u32 capsr = ceu_read(pcdev, CAPSR); - ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */ - return capsr; -} - -static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr) -{ - unsigned long timeout = jiffies + 10 * HZ; - - /* - * Wait until the end of the current frame. It can take a long time, - * but if it has been aborted by a CAPSR reset, it shoule exit sooner. - */ - while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout)) - msleep(1); - - if (time_after(jiffies, timeout)) { - dev_err(pcdev->ici.v4l2_dev.dev, - "Timeout waiting for frame end! Interface problem?\n"); - return; - } - - /* Wait until reset clears, this shall not hang... */ - while (ceu_read(pcdev, CAPSR) & (1 << 16)) - udelay(10); - - /* Anything to restore? */ - if (capsr & ~(1 << 16)) - ceu_write(pcdev, CAPSR, capsr); -} - -/* Find the bus subdevice driver, e.g., CSI2 */ -static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev, - struct soc_camera_device *icd) -{ - if (pcdev->csi2_pdev) { - struct v4l2_subdev *csi2_sd = find_csi2(pcdev); - if (csi2_sd && csi2_sd->grp_id == soc_camera_grp_id(icd)) - return csi2_sd; - } - - return soc_camera_to_subdev(icd); -} - -#define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \ - V4L2_MBUS_PCLK_SAMPLE_RISING | \ - V4L2_MBUS_HSYNC_ACTIVE_HIGH | \ - V4L2_MBUS_HSYNC_ACTIVE_LOW | \ - V4L2_MBUS_VSYNC_ACTIVE_HIGH | \ - V4L2_MBUS_VSYNC_ACTIVE_LOW | \ - V4L2_MBUS_DATA_ACTIVE_HIGH) - -/* Capture is not running, no interrupts, no locking needed */ -static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd); - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; - unsigned long value, common_flags = CEU_BUS_FLAGS; - u32 capsr = capture_save_reset(pcdev); - unsigned int yuv_lineskip; - int ret; - - /* - * If the client doesn't implement g_mbus_config, we just use our - * platform data - */ - ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); - if (!ret) { - common_flags = soc_mbus_config_compatible(&cfg, - common_flags); - if (!common_flags) - return -EINVAL; - } else if (ret != -ENOIOCTLCMD) { - return ret; - } - - /* Make choises, based on platform preferences */ - if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) && - (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) { - if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW) - common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH; - else - common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW; - } - - if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) && - (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) { - if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW) - common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH; - else - common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW; - } - - cfg.flags = common_flags; - ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg); - if (ret < 0 && ret != -ENOIOCTLCMD) - return ret; - - if (icd->current_fmt->host_fmt->bits_per_sample > 8) - pcdev->is_16bit = 1; - else - pcdev->is_16bit = 0; - - ceu_write(pcdev, CRCNTR, 0); - ceu_write(pcdev, CRCMPR, 0); - - value = 0x00000010; /* data fetch by default */ - yuv_lineskip = 0x10; - - switch (icd->current_fmt->host_fmt->fourcc) { - case V4L2_PIX_FMT_NV12: - case V4L2_PIX_FMT_NV21: - /* convert 4:2:2 -> 4:2:0 */ - yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */ - /* fall-through */ - case V4L2_PIX_FMT_NV16: - case V4L2_PIX_FMT_NV61: - switch (cam->code) { - case V4L2_MBUS_FMT_UYVY8_2X8: - value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */ - break; - case V4L2_MBUS_FMT_VYUY8_2X8: - value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */ - break; - case V4L2_MBUS_FMT_YUYV8_2X8: - value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */ - break; - case V4L2_MBUS_FMT_YVYU8_2X8: - value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */ - break; - default: - BUG(); - } - } - - if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 || - icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61) - value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */ - - value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0; - value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0; - - if (pcdev->pdata->csi2) /* CSI2 mode */ - value |= 3 << 12; - else if (pcdev->is_16bit) - value |= 1 << 12; - else if (pcdev->pdata->flags & SH_CEU_FLAG_LOWER_8BIT) - value |= 2 << 12; - - ceu_write(pcdev, CAMCR, value); - - ceu_write(pcdev, CAPCR, 0x00300000); - - switch (pcdev->field) { - case V4L2_FIELD_INTERLACED_TB: - value = 0x101; - break; - case V4L2_FIELD_INTERLACED_BT: - value = 0x102; - break; - default: - value = 0; - break; - } - ceu_write(pcdev, CAIFR, value); - - sh_mobile_ceu_set_rect(icd); - mdelay(1); - - dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr); - ceu_write(pcdev, CFLCR, pcdev->cflcr); - - /* - * A few words about byte order (observed in Big Endian mode) - * - * In data fetch mode bytes are received in chunks of 8 bytes. - * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) - * - * The data is however by default written to memory in reverse order: - * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) - * - * The lowest three bits of CDOCR allows us to do swapping, - * using 7 we swap the data bytes to match the incoming order: - * D0, D1, D2, D3, D4, D5, D6, D7 - */ - value = 0x00000007 | yuv_lineskip; - - ceu_write(pcdev, CDOCR, value); - ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ - - capture_restore(pcdev, capsr); - - /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ - return 0; -} - -static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd, - unsigned char buswidth) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd); - unsigned long common_flags = CEU_BUS_FLAGS; - struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; - int ret; - - ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); - if (!ret) - common_flags = soc_mbus_config_compatible(&cfg, - common_flags); - else if (ret != -ENOIOCTLCMD) - return ret; - - if (!common_flags || buswidth > 16) - return -EINVAL; - - return 0; -} - -static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = { - { - .fourcc = V4L2_PIX_FMT_NV12, - .name = "NV12", - .bits_per_sample = 8, - .packing = SOC_MBUS_PACKING_1_5X8, - .order = SOC_MBUS_ORDER_LE, - .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C, - }, { - .fourcc = V4L2_PIX_FMT_NV21, - .name = "NV21", - .bits_per_sample = 8, - .packing = SOC_MBUS_PACKING_1_5X8, - .order = SOC_MBUS_ORDER_LE, - .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C, - }, { - .fourcc = V4L2_PIX_FMT_NV16, - .name = "NV16", - .bits_per_sample = 8, - .packing = SOC_MBUS_PACKING_2X8_PADHI, - .order = SOC_MBUS_ORDER_LE, - .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C, - }, { - .fourcc = V4L2_PIX_FMT_NV61, - .name = "NV61", - .bits_per_sample = 8, - .packing = SOC_MBUS_PACKING_2X8_PADHI, - .order = SOC_MBUS_ORDER_LE, - .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C, - }, -}; - -/* This will be corrected as we get more formats */ -static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt) -{ - return fmt->packing == SOC_MBUS_PACKING_NONE || - (fmt->bits_per_sample == 8 && - fmt->packing == SOC_MBUS_PACKING_1_5X8) || - (fmt->bits_per_sample == 8 && - fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || - (fmt->bits_per_sample > 8 && - fmt->packing == SOC_MBUS_PACKING_EXTEND16); -} - -static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect); - -static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl) -{ - return container_of(ctrl->handler, struct soc_camera_device, - ctrl_handler); -} - -static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl) -{ - struct soc_camera_device *icd = ctrl_to_icd(ctrl); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - - switch (ctrl->id) { - case V4L2_CID_SHARPNESS: - switch (icd->current_fmt->host_fmt->fourcc) { - case V4L2_PIX_FMT_NV12: - case V4L2_PIX_FMT_NV21: - case V4L2_PIX_FMT_NV16: - case V4L2_PIX_FMT_NV61: - ceu_write(pcdev, CLFCR, !ctrl->val); - return 0; - } - break; - } - - return -EINVAL; -} - -static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = { - .s_ctrl = sh_mobile_ceu_s_ctrl, -}; - -static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx, - struct soc_camera_format_xlate *xlate) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct device *dev = icd->parent; - struct soc_camera_host *ici = to_soc_camera_host(dev); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - int ret, k, n; - int formats = 0; - struct sh_mobile_ceu_cam *cam; - enum v4l2_mbus_pixelcode code; - const struct soc_mbus_pixelfmt *fmt; - - ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code); - if (ret < 0) - /* No more formats */ - return 0; - - fmt = soc_mbus_get_fmtdesc(code); - if (!fmt) { - dev_warn(dev, "unsupported format code #%u: %d\n", idx, code); - return 0; - } - - if (!pcdev->pdata->csi2) { - /* Are there any restrictions in the CSI-2 case? */ - ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample); - if (ret < 0) - return 0; - } - - if (!icd->host_priv) { - struct v4l2_mbus_framefmt mf; - struct v4l2_rect rect; - int shift = 0; - - /* Add our control */ - v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops, - V4L2_CID_SHARPNESS, 0, 1, 1, 0); - if (icd->ctrl_handler.error) - return icd->ctrl_handler.error; - - /* FIXME: subwindow is lost between close / open */ - - /* Cache current client geometry */ - ret = client_g_rect(sd, &rect); - if (ret < 0) - return ret; - - /* First time */ - ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); - if (ret < 0) - return ret; - - /* - * All currently existing CEU implementations support 2560x1920 - * or larger frames. If the sensor is proposing too big a frame, - * don't bother with possibly supportred by the CEU larger - * sizes, just try VGA multiples. If needed, this can be - * adjusted in the future. - */ - while ((mf.width > pcdev->max_width || - mf.height > pcdev->max_height) && shift < 4) { - /* Try 2560x1920, 1280x960, 640x480, 320x240 */ - mf.width = 2560 >> shift; - mf.height = 1920 >> shift; - ret = v4l2_device_call_until_err(sd->v4l2_dev, - soc_camera_grp_id(icd), video, - s_mbus_fmt, &mf); - if (ret < 0) - return ret; - shift++; - } - - if (shift == 4) { - dev_err(dev, "Failed to configure the client below %ux%x\n", - mf.width, mf.height); - return -EIO; - } - - dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height); - - cam = kzalloc(sizeof(*cam), GFP_KERNEL); - if (!cam) - return -ENOMEM; - - /* We are called with current camera crop, initialise subrect with it */ - cam->rect = rect; - cam->subrect = rect; - - cam->width = mf.width; - cam->height = mf.height; - - icd->host_priv = cam; - } else { - cam = icd->host_priv; - } - - /* Beginning of a pass */ - if (!idx) - cam->extra_fmt = NULL; - - switch (code) { - case V4L2_MBUS_FMT_UYVY8_2X8: - case V4L2_MBUS_FMT_VYUY8_2X8: - case V4L2_MBUS_FMT_YUYV8_2X8: - case V4L2_MBUS_FMT_YVYU8_2X8: - if (cam->extra_fmt) - break; - - /* - * Our case is simple so far: for any of the above four camera - * formats we add all our four synthesized NV* formats, so, - * just marking the device with a single flag suffices. If - * the format generation rules are more complex, you would have - * to actually hang your already added / counted formats onto - * the host_priv pointer and check whether the format you're - * going to add now is already there. - */ - cam->extra_fmt = sh_mobile_ceu_formats; - - n = ARRAY_SIZE(sh_mobile_ceu_formats); - formats += n; - for (k = 0; xlate && k < n; k++) { - xlate->host_fmt = &sh_mobile_ceu_formats[k]; - xlate->code = code; - xlate++; - dev_dbg(dev, "Providing format %s using code %d\n", - sh_mobile_ceu_formats[k].name, code); - } - break; - default: - if (!sh_mobile_ceu_packing_supported(fmt)) - return 0; - } - - /* Generic pass-through */ - formats++; - if (xlate) { - xlate->host_fmt = fmt; - xlate->code = code; - xlate++; - dev_dbg(dev, "Providing format %s in pass-through mode\n", - fmt->name); - } - - return formats; -} - -static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd) -{ - kfree(icd->host_priv); - icd->host_priv = NULL; -} - -/* Check if any dimension of r1 is smaller than respective one of r2 */ -static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2) -{ - return r1->width < r2->width || r1->height < r2->height; -} - -/* Check if r1 fails to cover r2 */ -static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2) -{ - return r1->left > r2->left || r1->top > r2->top || - r1->left + r1->width < r2->left + r2->width || - r1->top + r1->height < r2->top + r2->height; -} - -static unsigned int scale_down(unsigned int size, unsigned int scale) -{ - return (size * 4096 + scale / 2) / scale; -} - -static unsigned int calc_generic_scale(unsigned int input, unsigned int output) -{ - return (input * 4096 + output / 2) / output; -} - -/* Get and store current client crop */ -static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect) -{ - struct v4l2_crop crop; - struct v4l2_cropcap cap; - int ret; - - crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - ret = v4l2_subdev_call(sd, video, g_crop, &crop); - if (!ret) { - *rect = crop.c; - return ret; - } - - /* Camera driver doesn't support .g_crop(), assume default rectangle */ - cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - ret = v4l2_subdev_call(sd, video, cropcap, &cap); - if (!ret) - *rect = cap.defrect; - - return ret; -} - -/* Client crop has changed, update our sub-rectangle to remain within the area */ -static void update_subrect(struct sh_mobile_ceu_cam *cam) -{ - struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect; - - if (rect->width < subrect->width) - subrect->width = rect->width; - - if (rect->height < subrect->height) - subrect->height = rect->height; - - if (rect->left > subrect->left) - subrect->left = rect->left; - else if (rect->left + rect->width > - subrect->left + subrect->width) - subrect->left = rect->left + rect->width - - subrect->width; - - if (rect->top > subrect->top) - subrect->top = rect->top; - else if (rect->top + rect->height > - subrect->top + subrect->height) - subrect->top = rect->top + rect->height - - subrect->height; -} - -/* - * The common for both scaling and cropping iterative approach is: - * 1. try if the client can produce exactly what requested by the user - * 2. if (1) failed, try to double the client image until we get one big enough - * 3. if (2) failed, try to request the maximum image - */ -static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop, - struct v4l2_crop *cam_crop) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c; - struct device *dev = sd->v4l2_dev->dev; - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct v4l2_cropcap cap; - int ret; - unsigned int width, height; - - v4l2_subdev_call(sd, video, s_crop, crop); - ret = client_g_rect(sd, cam_rect); - if (ret < 0) - return ret; - - /* - * Now cam_crop contains the current camera input rectangle, and it must - * be within camera cropcap bounds - */ - if (!memcmp(rect, cam_rect, sizeof(*rect))) { - /* Even if camera S_CROP failed, but camera rectangle matches */ - dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n", - rect->width, rect->height, rect->left, rect->top); - cam->rect = *cam_rect; - return 0; - } - - /* Try to fix cropping, that camera hasn't managed to set */ - dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n", - cam_rect->width, cam_rect->height, - cam_rect->left, cam_rect->top, - rect->width, rect->height, rect->left, rect->top); - - /* We need sensor maximum rectangle */ - ret = v4l2_subdev_call(sd, video, cropcap, &cap); - if (ret < 0) - return ret; - - /* Put user requested rectangle within sensor bounds */ - soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2, - cap.bounds.width); - soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4, - cap.bounds.height); - - /* - * Popular special case - some cameras can only handle fixed sizes like - * QVGA, VGA,... Take care to avoid infinite loop. - */ - width = max(cam_rect->width, 2); - height = max(cam_rect->height, 2); - - /* - * Loop as long as sensor is not covering the requested rectangle and - * is still within its bounds - */ - while (!ret && (is_smaller(cam_rect, rect) || - is_inside(cam_rect, rect)) && - (cap.bounds.width > width || cap.bounds.height > height)) { - - width *= 2; - height *= 2; - - cam_rect->width = width; - cam_rect->height = height; - - /* - * We do not know what capabilities the camera has to set up - * left and top borders. We could try to be smarter in iterating - * them, e.g., if camera current left is to the right of the - * target left, set it to the middle point between the current - * left and minimum left. But that would add too much - * complexity: we would have to iterate each border separately. - * Instead we just drop to the left and top bounds. - */ - if (cam_rect->left > rect->left) - cam_rect->left = cap.bounds.left; - - if (cam_rect->left + cam_rect->width < rect->left + rect->width) - cam_rect->width = rect->left + rect->width - - cam_rect->left; - - if (cam_rect->top > rect->top) - cam_rect->top = cap.bounds.top; - - if (cam_rect->top + cam_rect->height < rect->top + rect->height) - cam_rect->height = rect->top + rect->height - - cam_rect->top; - - v4l2_subdev_call(sd, video, s_crop, cam_crop); - ret = client_g_rect(sd, cam_rect); - dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret, - cam_rect->width, cam_rect->height, - cam_rect->left, cam_rect->top); - } - - /* S_CROP must not modify the rectangle */ - if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) { - /* - * The camera failed to configure a suitable cropping, - * we cannot use the current rectangle, set to max - */ - *cam_rect = cap.bounds; - v4l2_subdev_call(sd, video, s_crop, cam_crop); - ret = client_g_rect(sd, cam_rect); - dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret, - cam_rect->width, cam_rect->height, - cam_rect->left, cam_rect->top); - } - - if (!ret) { - cam->rect = *cam_rect; - update_subrect(cam); - } - - return ret; -} - -/* Iterative s_mbus_fmt, also updates cached client crop on success */ -static int client_s_fmt(struct soc_camera_device *icd, - struct v4l2_mbus_framefmt *mf, bool ceu_can_scale) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct device *dev = icd->parent; - unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h; - unsigned int max_width, max_height; - struct v4l2_cropcap cap; - bool ceu_1to1; - int ret; - - ret = v4l2_device_call_until_err(sd->v4l2_dev, - soc_camera_grp_id(icd), video, - s_mbus_fmt, mf); - if (ret < 0) - return ret; - - dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height); - - if (width == mf->width && height == mf->height) { - /* Perfect! The client has done it all. */ - ceu_1to1 = true; - goto update_cache; - } - - ceu_1to1 = false; - if (!ceu_can_scale) - goto update_cache; - - cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - ret = v4l2_subdev_call(sd, video, cropcap, &cap); - if (ret < 0) - return ret; - - max_width = min(cap.bounds.width, pcdev->max_width); - max_height = min(cap.bounds.height, pcdev->max_height); - - /* Camera set a format, but geometry is not precise, try to improve */ - tmp_w = mf->width; - tmp_h = mf->height; - - /* width <= max_width && height <= max_height - guaranteed by try_fmt */ - while ((width > tmp_w || height > tmp_h) && - tmp_w < max_width && tmp_h < max_height) { - tmp_w = min(2 * tmp_w, max_width); - tmp_h = min(2 * tmp_h, max_height); - mf->width = tmp_w; - mf->height = tmp_h; - ret = v4l2_device_call_until_err(sd->v4l2_dev, - soc_camera_grp_id(icd), video, - s_mbus_fmt, mf); - dev_geo(dev, "Camera scaled to %ux%u\n", - mf->width, mf->height); - if (ret < 0) { - /* This shouldn't happen */ - dev_err(dev, "Client failed to set format: %d\n", ret); - return ret; - } - } - -update_cache: - /* Update cache */ - ret = client_g_rect(sd, &cam->rect); - if (ret < 0) - return ret; - - if (ceu_1to1) - cam->subrect = cam->rect; - else - update_subrect(cam); - - return 0; -} - -/** - * @width - on output: user width, mapped back to input - * @height - on output: user height, mapped back to input - * @mf - in- / output camera output window - */ -static int client_scale(struct soc_camera_device *icd, - struct v4l2_mbus_framefmt *mf, - unsigned int *width, unsigned int *height, - bool ceu_can_scale) -{ - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct device *dev = icd->parent; - struct v4l2_mbus_framefmt mf_tmp = *mf; - unsigned int scale_h, scale_v; - int ret; - - /* - * 5. Apply iterative camera S_FMT for camera user window (also updates - * client crop cache and the imaginary sub-rectangle). - */ - ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale); - if (ret < 0) - return ret; - - dev_geo(dev, "5: camera scaled to %ux%u\n", - mf_tmp.width, mf_tmp.height); - - /* 6. Retrieve camera output window (g_fmt) */ - - /* unneeded - it is already in "mf_tmp" */ - - /* 7. Calculate new client scales. */ - scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width); - scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height); - - mf->width = mf_tmp.width; - mf->height = mf_tmp.height; - mf->colorspace = mf_tmp.colorspace; - - /* - * 8. Calculate new CEU crop - apply camera scales to previously - * updated "effective" crop. - */ - *width = scale_down(cam->subrect.width, scale_h); - *height = scale_down(cam->subrect.height, scale_v); - - dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height); - - return 0; -} - -/* - * CEU can scale and crop, but we don't want to waste bandwidth and kill the - * framerate by always requesting the maximum image from the client. See - * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of - * scaling and cropping algorithms and for the meaning of referenced here steps. - */ -static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd, - struct v4l2_crop *a) -{ - struct v4l2_rect *rect = &a->c; - struct device *dev = icd->parent; - struct soc_camera_host *ici = to_soc_camera_host(dev); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct v4l2_crop cam_crop; - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct v4l2_rect *cam_rect = &cam_crop.c; - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct v4l2_mbus_framefmt mf; - unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v, - out_width, out_height; - int interm_width, interm_height; - u32 capsr, cflcr; - int ret; - - dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height, - rect->left, rect->top); - - /* During camera cropping its output window can change too, stop CEU */ - capsr = capture_save_reset(pcdev); - dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr); - - /* - * 1. - 2. Apply iterative camera S_CROP for new input window, read back - * actual camera rectangle. - */ - ret = client_s_crop(icd, a, &cam_crop); - if (ret < 0) - return ret; - - dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n", - cam_rect->width, cam_rect->height, - cam_rect->left, cam_rect->top); - - /* On success cam_crop contains current camera crop */ - - /* 3. Retrieve camera output window */ - ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); - if (ret < 0) - return ret; - - if (mf.width > pcdev->max_width || mf.height > pcdev->max_height) - return -EINVAL; - - /* 4. Calculate camera scales */ - scale_cam_h = calc_generic_scale(cam_rect->width, mf.width); - scale_cam_v = calc_generic_scale(cam_rect->height, mf.height); - - /* Calculate intermediate window */ - interm_width = scale_down(rect->width, scale_cam_h); - interm_height = scale_down(rect->height, scale_cam_v); - - if (interm_width < icd->user_width) { - u32 new_scale_h; - - new_scale_h = calc_generic_scale(rect->width, icd->user_width); - - mf.width = scale_down(cam_rect->width, new_scale_h); - } - - if (interm_height < icd->user_height) { - u32 new_scale_v; - - new_scale_v = calc_generic_scale(rect->height, icd->user_height); - - mf.height = scale_down(cam_rect->height, new_scale_v); - } - - if (interm_width < icd->user_width || interm_height < icd->user_height) { - ret = v4l2_device_call_until_err(sd->v4l2_dev, - soc_camera_grp_id(icd), video, - s_mbus_fmt, &mf); - if (ret < 0) - return ret; - - dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height); - scale_cam_h = calc_generic_scale(cam_rect->width, mf.width); - scale_cam_v = calc_generic_scale(cam_rect->height, mf.height); - interm_width = scale_down(rect->width, scale_cam_h); - interm_height = scale_down(rect->height, scale_cam_v); - } - - /* Cache camera output window */ - cam->width = mf.width; - cam->height = mf.height; - - if (pcdev->image_mode) { - out_width = min(interm_width, icd->user_width); - out_height = min(interm_height, icd->user_height); - } else { - out_width = interm_width; - out_height = interm_height; - } - - /* - * 5. Calculate CEU scales from camera scales from results of (5) and - * the user window - */ - scale_ceu_h = calc_scale(interm_width, &out_width); - scale_ceu_v = calc_scale(interm_height, &out_height); - - dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v); - - /* Apply CEU scales. */ - cflcr = scale_ceu_h | (scale_ceu_v << 16); - if (cflcr != pcdev->cflcr) { - pcdev->cflcr = cflcr; - ceu_write(pcdev, CFLCR, cflcr); - } - - icd->user_width = out_width & ~3; - icd->user_height = out_height & ~3; - /* Offsets are applied at the CEU scaling filter input */ - cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1; - cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1; - - /* 6. Use CEU cropping to crop to the new window. */ - sh_mobile_ceu_set_rect(icd); - - cam->subrect = *rect; - - dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n", - icd->user_width, icd->user_height, - cam->ceu_left, cam->ceu_top); - - /* Restore capture. The CE bit can be cleared by the hardware */ - if (pcdev->active) - capsr |= 1; - capture_restore(pcdev, capsr); - - /* Even if only camera cropping succeeded */ - return ret; -} - -static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd, - struct v4l2_crop *a) -{ - struct sh_mobile_ceu_cam *cam = icd->host_priv; - - a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - a->c = cam->subrect; - - return 0; -} - -/* - * Calculate real client output window by applying new scales to the current - * client crop. New scales are calculated from the requested output format and - * CEU crop, mapped backed onto the client input (subrect). - */ -static void calculate_client_output(struct soc_camera_device *icd, - const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf) -{ - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct device *dev = icd->parent; - struct v4l2_rect *cam_subrect = &cam->subrect; - unsigned int scale_v, scale_h; - - if (cam_subrect->width == cam->rect.width && - cam_subrect->height == cam->rect.height) { - /* No sub-cropping */ - mf->width = pix->width; - mf->height = pix->height; - return; - } - - /* 1.-2. Current camera scales and subwin - cached. */ - - dev_geo(dev, "2: subwin %ux%u@%u:%u\n", - cam_subrect->width, cam_subrect->height, - cam_subrect->left, cam_subrect->top); - - /* - * 3. Calculate new combined scales from input sub-window to requested - * user window. - */ - - /* - * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF - * (128x96) or larger than VGA - */ - scale_h = calc_generic_scale(cam_subrect->width, pix->width); - scale_v = calc_generic_scale(cam_subrect->height, pix->height); - - dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v); - - /* - * 4. Calculate desired client output window by applying combined scales - * to client (real) input window. - */ - mf->width = scale_down(cam->rect.width, scale_h); - mf->height = scale_down(cam->rect.height, scale_v); -} - -/* Similar to set_crop multistage iterative algorithm */ -static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, - struct v4l2_format *f) -{ - struct device *dev = icd->parent; - struct soc_camera_host *ici = to_soc_camera_host(dev); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - struct sh_mobile_ceu_cam *cam = icd->host_priv; - struct v4l2_pix_format *pix = &f->fmt.pix; - struct v4l2_mbus_framefmt mf; - __u32 pixfmt = pix->pixelformat; - const struct soc_camera_format_xlate *xlate; - /* Keep Compiler Happy */ - unsigned int ceu_sub_width = 0, ceu_sub_height = 0; - u16 scale_v, scale_h; - int ret; - bool image_mode; - enum v4l2_field field; - - switch (pix->field) { - default: - pix->field = V4L2_FIELD_NONE; - /* fall-through */ - case V4L2_FIELD_INTERLACED_TB: - case V4L2_FIELD_INTERLACED_BT: - case V4L2_FIELD_NONE: - field = pix->field; - break; - case V4L2_FIELD_INTERLACED: - field = V4L2_FIELD_INTERLACED_TB; - break; - } - - xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); - if (!xlate) { - dev_warn(dev, "Format %x not found\n", pixfmt); - return -EINVAL; - } - - /* 1.-4. Calculate desired client output geometry */ - calculate_client_output(icd, pix, &mf); - mf.field = pix->field; - mf.colorspace = pix->colorspace; - mf.code = xlate->code; - - switch (pixfmt) { - case V4L2_PIX_FMT_NV12: - case V4L2_PIX_FMT_NV21: - case V4L2_PIX_FMT_NV16: - case V4L2_PIX_FMT_NV61: - image_mode = true; - break; - default: - image_mode = false; - } - - dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code, - pix->width, pix->height); - - dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height); - - /* 5. - 9. */ - ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height, - image_mode && V4L2_FIELD_NONE == field); - - dev_geo(dev, "5-9: client scale return %d\n", ret); - - /* Done with the camera. Now see if we can improve the result */ - - dev_geo(dev, "fmt %ux%u, requested %ux%u\n", - mf.width, mf.height, pix->width, pix->height); - if (ret < 0) - return ret; - - if (mf.code != xlate->code) - return -EINVAL; - - /* 9. Prepare CEU crop */ - cam->width = mf.width; - cam->height = mf.height; - - /* 10. Use CEU scaling to scale to the requested user window. */ - - /* We cannot scale up */ - if (pix->width > ceu_sub_width) - ceu_sub_width = pix->width; - - if (pix->height > ceu_sub_height) - ceu_sub_height = pix->height; - - pix->colorspace = mf.colorspace; - - if (image_mode) { - /* Scale pix->{width x height} down to width x height */ - scale_h = calc_scale(ceu_sub_width, &pix->width); - scale_v = calc_scale(ceu_sub_height, &pix->height); - } else { - pix->width = ceu_sub_width; - pix->height = ceu_sub_height; - scale_h = 0; - scale_v = 0; - } - - pcdev->cflcr = scale_h | (scale_v << 16); - - /* - * We have calculated CFLCR, the actual configuration will be performed - * in sh_mobile_ceu_set_bus_param() - */ - - dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n", - ceu_sub_width, scale_h, pix->width, - ceu_sub_height, scale_v, pix->height); - - cam->code = xlate->code; - icd->current_fmt = xlate; - - pcdev->field = field; - pcdev->image_mode = image_mode; - - /* CFSZR requirement */ - pix->width &= ~3; - pix->height &= ~3; - - return 0; -} - -#define CEU_CHDW_MAX 8188U /* Maximum line stride */ - -static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, - struct v4l2_format *f) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - const struct soc_camera_format_xlate *xlate; - struct v4l2_pix_format *pix = &f->fmt.pix; - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct v4l2_mbus_framefmt mf; - __u32 pixfmt = pix->pixelformat; - int width, height; - int ret; - - dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n", - pixfmt, pix->width, pix->height); - - xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); - if (!xlate) { - xlate = icd->current_fmt; - dev_dbg(icd->parent, "Format %x not found, keeping %x\n", - pixfmt, xlate->host_fmt->fourcc); - pixfmt = xlate->host_fmt->fourcc; - pix->pixelformat = pixfmt; - pix->colorspace = icd->colorspace; - } - - /* FIXME: calculate using depth and bus width */ - - /* CFSZR requires height and width to be 4-pixel aligned */ - v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2, - &pix->height, 4, pcdev->max_height, 2, 0); - - width = pix->width; - height = pix->height; - - /* limit to sensor capabilities */ - mf.width = pix->width; - mf.height = pix->height; - mf.field = pix->field; - mf.code = xlate->code; - mf.colorspace = pix->colorspace; - - ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd), - video, try_mbus_fmt, &mf); - if (ret < 0) - return ret; - - pix->width = mf.width; - pix->height = mf.height; - pix->field = mf.field; - pix->colorspace = mf.colorspace; - - switch (pixfmt) { - case V4L2_PIX_FMT_NV12: - case V4L2_PIX_FMT_NV21: - case V4L2_PIX_FMT_NV16: - case V4L2_PIX_FMT_NV61: - /* FIXME: check against rect_max after converting soc-camera */ - /* We can scale precisely, need a bigger image from camera */ - if (pix->width < width || pix->height < height) { - /* - * We presume, the sensor behaves sanely, i.e., if - * requested a bigger rectangle, it will not return a - * smaller one. - */ - mf.width = pcdev->max_width; - mf.height = pcdev->max_height; - ret = v4l2_device_call_until_err(sd->v4l2_dev, - soc_camera_grp_id(icd), video, - try_mbus_fmt, &mf); - if (ret < 0) { - /* Shouldn't actually happen... */ - dev_err(icd->parent, - "FIXME: client try_fmt() = %d\n", ret); - return ret; - } - } - /* We will scale exactly */ - if (mf.width > width) - pix->width = width; - if (mf.height > height) - pix->height = height; - - pix->bytesperline = max(pix->bytesperline, pix->width); - pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX); - pix->bytesperline &= ~3; - break; - - default: - /* Configurable stride isn't supported in pass-through mode. */ - pix->bytesperline = 0; - } - - pix->width &= ~3; - pix->height &= ~3; - pix->sizeimage = 0; - - dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n", - __func__, ret, pix->pixelformat, pix->width, pix->height); - - return ret; -} - -static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd, - struct v4l2_crop *a) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct sh_mobile_ceu_dev *pcdev = ici->priv; - u32 out_width = icd->user_width, out_height = icd->user_height; - int ret; - - /* Freeze queue */ - pcdev->frozen = 1; - /* Wait for frame */ - ret = wait_for_completion_interruptible(&pcdev->complete); - /* Stop the client */ - ret = v4l2_subdev_call(sd, video, s_stream, 0); - if (ret < 0) - dev_warn(icd->parent, - "Client failed to stop the stream: %d\n", ret); - else - /* Do the crop, if it fails, there's nothing more we can do */ - sh_mobile_ceu_set_crop(icd, a); - - dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height); - - if (icd->user_width != out_width || icd->user_height != out_height) { - struct v4l2_format f = { - .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, - .fmt.pix = { - .width = out_width, - .height = out_height, - .pixelformat = icd->current_fmt->host_fmt->fourcc, - .field = pcdev->field, - .colorspace = icd->colorspace, - }, - }; - ret = sh_mobile_ceu_set_fmt(icd, &f); - if (!ret && (out_width != f.fmt.pix.width || - out_height != f.fmt.pix.height)) - ret = -EINVAL; - if (!ret) { - icd->user_width = out_width & ~3; - icd->user_height = out_height & ~3; - ret = sh_mobile_ceu_set_bus_param(icd); - } - } - - /* Thaw the queue */ - pcdev->frozen = 0; - spin_lock_irq(&pcdev->lock); - sh_mobile_ceu_capture(pcdev); - spin_unlock_irq(&pcdev->lock); - /* Start the client */ - ret = v4l2_subdev_call(sd, video, s_stream, 1); - return ret; -} - -static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) -{ - struct soc_camera_device *icd = file->private_data; - - return vb2_poll(&icd->vb2_vidq, file, pt); -} - -static int sh_mobile_ceu_querycap(struct soc_camera_host *ici, - struct v4l2_capability *cap) -{ - strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); - cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; - return 0; -} - -static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q, - struct soc_camera_device *icd) -{ - q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - q->io_modes = VB2_MMAP | VB2_USERPTR; - q->drv_priv = icd; - q->ops = &sh_mobile_ceu_videobuf_ops; - q->mem_ops = &vb2_dma_contig_memops; - q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer); - - return vb2_queue_init(q); -} - -static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { - .owner = THIS_MODULE, - .add = sh_mobile_ceu_add_device, - .remove = sh_mobile_ceu_remove_device, - .get_formats = sh_mobile_ceu_get_formats, - .put_formats = sh_mobile_ceu_put_formats, - .get_crop = sh_mobile_ceu_get_crop, - .set_crop = sh_mobile_ceu_set_crop, - .set_livecrop = sh_mobile_ceu_set_livecrop, - .set_fmt = sh_mobile_ceu_set_fmt, - .try_fmt = sh_mobile_ceu_try_fmt, - .poll = sh_mobile_ceu_poll, - .querycap = sh_mobile_ceu_querycap, - .set_bus_param = sh_mobile_ceu_set_bus_param, - .init_videobuf2 = sh_mobile_ceu_init_videobuf, -}; - -struct bus_wait { - struct notifier_block notifier; - struct completion completion; - struct device *dev; -}; - -static int bus_notify(struct notifier_block *nb, - unsigned long action, void *data) -{ - struct device *dev = data; - struct bus_wait *wait = container_of(nb, struct bus_wait, notifier); - - if (wait->dev != dev) - return NOTIFY_DONE; - - switch (action) { - case BUS_NOTIFY_UNBOUND_DRIVER: - /* Protect from module unloading */ - wait_for_completion(&wait->completion); - return NOTIFY_OK; - } - return NOTIFY_DONE; -} - -static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev) -{ - struct sh_mobile_ceu_dev *pcdev; - struct resource *res; - void __iomem *base; - unsigned int irq; - int err = 0; - struct bus_wait wait = { - .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion), - .notifier.notifier_call = bus_notify, - }; - struct sh_mobile_ceu_companion *csi2; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - irq = platform_get_irq(pdev, 0); - if (!res || (int)irq <= 0) { - dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); - err = -ENODEV; - goto exit; - } - - pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); - if (!pcdev) { - dev_err(&pdev->dev, "Could not allocate pcdev\n"); - err = -ENOMEM; - goto exit; - } - - INIT_LIST_HEAD(&pcdev->capture); - spin_lock_init(&pcdev->lock); - init_completion(&pcdev->complete); - - pcdev->pdata = pdev->dev.platform_data; - if (!pcdev->pdata) { - err = -EINVAL; - dev_err(&pdev->dev, "CEU platform data not set.\n"); - goto exit_kfree; - } - - pcdev->max_width = pcdev->pdata->max_width ? : 2560; - pcdev->max_height = pcdev->pdata->max_height ? : 1920; - - base = ioremap_nocache(res->start, resource_size(res)); - if (!base) { - err = -ENXIO; - dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); - goto exit_kfree; - } - - pcdev->irq = irq; - pcdev->base = base; - pcdev->video_limit = 0; /* only enabled if second resource exists */ - - res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (res) { - err = dma_declare_coherent_memory(&pdev->dev, res->start, - res->start, - resource_size(res), - DMA_MEMORY_MAP | - DMA_MEMORY_EXCLUSIVE); - if (!err) { - dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); - err = -ENXIO; - goto exit_iounmap; - } - - pcdev->video_limit = resource_size(res); - } - - /* request irq */ - err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, - dev_name(&pdev->dev), pcdev); - if (err) { - dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); - goto exit_release_mem; - } - - pm_suspend_ignore_children(&pdev->dev, true); - pm_runtime_enable(&pdev->dev); - pm_runtime_resume(&pdev->dev); - - pcdev->ici.priv = pcdev; - pcdev->ici.v4l2_dev.dev = &pdev->dev; - pcdev->ici.nr = pdev->id; - pcdev->ici.drv_name = dev_name(&pdev->dev); - pcdev->ici.ops = &sh_mobile_ceu_host_ops; - pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE; - - pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); - if (IS_ERR(pcdev->alloc_ctx)) { - err = PTR_ERR(pcdev->alloc_ctx); - goto exit_free_clk; - } - - err = soc_camera_host_register(&pcdev->ici); - if (err) - goto exit_free_ctx; - - /* CSI2 interfacing */ - csi2 = pcdev->pdata->csi2; - if (csi2) { - struct platform_device *csi2_pdev = - platform_device_alloc("sh-mobile-csi2", csi2->id); - struct sh_csi2_pdata *csi2_pdata = csi2->platform_data; - - if (!csi2_pdev) { - err = -ENOMEM; - goto exit_host_unregister; - } - - pcdev->csi2_pdev = csi2_pdev; - - err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata)); - if (err < 0) - goto exit_pdev_put; - - csi2_pdata = csi2_pdev->dev.platform_data; - csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev; - - csi2_pdev->resource = csi2->resource; - csi2_pdev->num_resources = csi2->num_resources; - - err = platform_device_add(csi2_pdev); - if (err < 0) - goto exit_pdev_put; - - wait.dev = &csi2_pdev->dev; - - err = bus_register_notifier(&platform_bus_type, &wait.notifier); - if (err < 0) - goto exit_pdev_unregister; - - /* - * From this point the driver module will not unload, until - * we complete the completion. - */ - - if (!csi2_pdev->dev.driver) { - complete(&wait.completion); - /* Either too late, or probing failed */ - bus_unregister_notifier(&platform_bus_type, &wait.notifier); - err = -ENXIO; - goto exit_pdev_unregister; - } - - /* - * The module is still loaded, in the worst case it is hanging - * in device release on our completion. So, _now_ dereferencing - * the "owner" is safe! - */ - - err = try_module_get(csi2_pdev->dev.driver->owner); - - /* Let notifier complete, if it has been locked */ - complete(&wait.completion); - bus_unregister_notifier(&platform_bus_type, &wait.notifier); - if (!err) { - err = -ENODEV; - goto exit_pdev_unregister; - } - } - - return 0; - -exit_pdev_unregister: - platform_device_del(pcdev->csi2_pdev); -exit_pdev_put: - pcdev->csi2_pdev->resource = NULL; - platform_device_put(pcdev->csi2_pdev); -exit_host_unregister: - soc_camera_host_unregister(&pcdev->ici); -exit_free_ctx: - vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); -exit_free_clk: - pm_runtime_disable(&pdev->dev); - free_irq(pcdev->irq, pcdev); -exit_release_mem: - if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) - dma_release_declared_memory(&pdev->dev); -exit_iounmap: - iounmap(base); -exit_kfree: - kfree(pcdev); -exit: - return err; -} - -static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev) -{ - struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); - struct sh_mobile_ceu_dev *pcdev = container_of(soc_host, - struct sh_mobile_ceu_dev, ici); - struct platform_device *csi2_pdev = pcdev->csi2_pdev; - - soc_camera_host_unregister(soc_host); - pm_runtime_disable(&pdev->dev); - free_irq(pcdev->irq, pcdev); - if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) - dma_release_declared_memory(&pdev->dev); - iounmap(pcdev->base); - vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); - if (csi2_pdev && csi2_pdev->dev.driver) { - struct module *csi2_drv = csi2_pdev->dev.driver->owner; - platform_device_del(csi2_pdev); - csi2_pdev->resource = NULL; - platform_device_put(csi2_pdev); - module_put(csi2_drv); - } - kfree(pcdev); - - return 0; -} - -static int sh_mobile_ceu_runtime_nop(struct device *dev) -{ - /* Runtime PM callback shared between ->runtime_suspend() - * and ->runtime_resume(). Simply returns success. - * - * This driver re-initializes all registers after - * pm_runtime_get_sync() anyway so there is no need - * to save and restore registers here. - */ - return 0; -} - -static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = { - .runtime_suspend = sh_mobile_ceu_runtime_nop, - .runtime_resume = sh_mobile_ceu_runtime_nop, -}; - -static struct platform_driver sh_mobile_ceu_driver = { - .driver = { - .name = "sh_mobile_ceu", - .pm = &sh_mobile_ceu_dev_pm_ops, - }, - .probe = sh_mobile_ceu_probe, - .remove = __devexit_p(sh_mobile_ceu_remove), -}; - -static int __init sh_mobile_ceu_init(void) -{ - /* Whatever return code */ - request_module("sh_mobile_csi2"); - return platform_driver_register(&sh_mobile_ceu_driver); -} - -static void __exit sh_mobile_ceu_exit(void) -{ - platform_driver_unregister(&sh_mobile_ceu_driver); -} - -module_init(sh_mobile_ceu_init); -module_exit(sh_mobile_ceu_exit); - -MODULE_DESCRIPTION("SuperH Mobile CEU driver"); -MODULE_AUTHOR("Magnus Damm"); -MODULE_LICENSE("GPL"); -MODULE_VERSION("0.0.6"); -MODULE_ALIAS("platform:sh_mobile_ceu"); |