--- /dev/null
+/*
+ * 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/err.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/of.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-async.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>
+
+#include "soc_scale_crop.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;
+ /* Asynchronous CSI2 linking */
+ struct v4l2_async_subdev *csi2_asd;
+ struct v4l2_subdev *csi2_sd;
+ /* Synchronous probing compatibility */
+ 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 long flags;
+
+ 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;
+ u32 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;
+
+ 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(pcdev->ici.v4l2_dev.dev, "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->ici.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 void 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);
+
+ 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 = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .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);
+ v4l2_get_timestamp(&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_sd)
+ return pcdev->csi2_sd;
+
+ if (pcdev->csi2_asd) {
+ char name[] = "sh-mobile-csi2";
+ v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
+ if (!strncmp(name, sd->name, sizeof(name) - 1)) {
+ pcdev->csi2_sd = sd;
+ return sd;
+ }
+ }
+
+ return NULL;
+}
+
+static struct v4l2_subdev *csi2_subdev(struct sh_mobile_ceu_dev *pcdev,
+ struct soc_camera_device *icd)
+{
+ struct v4l2_subdev *sd = pcdev->csi2_sd;
+
+ return sd && sd->grp_id == soc_camera_grp_id(icd) ? sd : NULL;
+}
+
+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 = find_csi2(pcdev);
+ int ret;
+
+ 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)
+ 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 (csi2_sd && ret == -ENODEV)
+ csi2_sd->grp_id = 0;
+
+ dev_info(icd->parent,
+ "SuperH Mobile CEU%s driver attached to camera %d\n",
+ csi2_sd && csi2_sd->grp_id ? "/CSI-2" : "", icd->devnum);
+
+ return 0;
+}
+
+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);
+
+ dev_info(icd->parent,
+ "SuperH Mobile CEU driver detached from camera %d\n",
+ icd->devnum);
+
+ v4l2_subdev_call(csi2_sd, core, s_power, 0);
+}
+
+/* Called with .host_lock held */
+static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
+{
+ struct sh_mobile_ceu_dev *pcdev = ici->priv;
+
+ pm_runtime_get_sync(ici->v4l2_dev.dev);
+
+ pcdev->buf_total = 0;
+
+ sh_mobile_ceu_soft_reset(pcdev);
+
+ return 0;
+}
+
+/* Called with .host_lock held */
+static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
+{
+ struct sh_mobile_ceu_dev *pcdev = ici->priv;
+
+ /* 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(ici->v4l2_dev.dev);
+}
+
+/*
+ * 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 (csi2_subdev(pcdev, icd)) {
+ 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)
+{
+ return csi2_subdev(pcdev, icd) ? : 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->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->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 MEDIA_BUS_FMT_UYVY8_2X8:
+ value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
+ break;
+ case MEDIA_BUS_FMT_VYUY8_2X8:
+ value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
+ break;
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
+ break;
+ case MEDIA_BUS_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 (csi2_subdev(pcdev, icd)) /* CSI2 mode */
+ value |= 3 << 12;
+ else if (pcdev->is_16bit)
+ value |= 1 << 12;
+ else if (pcdev->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 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;
+ u32 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 (!csi2_subdev(pcdev, icd)) {
+ /* 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, 1);
+ if (icd->ctrl_handler.error)
+ return icd->ctrl_handler.error;
+
+ /* FIXME: subwindow is lost between close / open */
+
+ /* Cache current client geometry */
+ ret = soc_camera_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 MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_VYUY8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_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;
+}
+
+#define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
+#define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
+
+/*
+ * 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,
+ const struct v4l2_crop *a)
+{
+ struct v4l2_crop a_writable = *a;
+ const struct v4l2_rect *rect = &a_writable.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 = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
+ &cam->rect, &cam->subrect);
+ 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;
+}
+
+/* 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;
+ unsigned int ceu_sub_width = pcdev->max_width,
+ ceu_sub_height = pcdev->max_height;
+ 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 */
+ soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
+ 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 = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
+ &mf, &ceu_sub_width, &ceu_sub_height,
+ image_mode && V4L2_FIELD_NONE == field, 12);
+
+ 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,
+ const 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->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
+ struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+
+ 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);
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->lock = &ici->host_lock;
+
+ 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,
+ .clock_start = sh_mobile_ceu_clock_start,
+ .clock_stop = sh_mobile_ceu_clock_stop,
+ .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 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, i;
+ 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");
+ return -ENODEV;
+ }
+
+ pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
+ if (!pcdev) {
+ dev_err(&pdev->dev, "Could not allocate pcdev\n");
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&pcdev->capture);
+ spin_lock_init(&pcdev->lock);
+ init_completion(&pcdev->complete);
+
+ pcdev->pdata = pdev->dev.platform_data;
+ if (!pcdev->pdata && !pdev->dev.of_node) {
+ dev_err(&pdev->dev, "CEU platform data not set.\n");
+ return -EINVAL;
+ }
+
+ /* TODO: implement per-device bus flags */
+ if (pcdev->pdata) {
+ pcdev->max_width = pcdev->pdata->max_width;
+ pcdev->max_height = pcdev->pdata->max_height;
+ pcdev->flags = pcdev->pdata->flags;
+ }
+
+ if (!pcdev->max_width) {
+ unsigned int v;
+ err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
+ if (!err)
+ pcdev->max_width = v;
+
+ if (!pcdev->max_width)
+ pcdev->max_width = 2560;
+ }
+ if (!pcdev->max_height) {
+ unsigned int v;
+ err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
+ if (!err)
+ pcdev->max_height = v;
+
+ if (!pcdev->max_height)
+ pcdev->max_height = 1920;
+ }
+
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ 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");
+ return -ENXIO;
+ }
+
+ pcdev->video_limit = resource_size(res);
+ }
+
+ /* request irq */
+ err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
+ 0, 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;
+ }
+
+ if (pcdev->pdata && pcdev->pdata->asd_sizes) {
+ struct v4l2_async_subdev **asd;
+ char name[] = "sh-mobile-csi2";
+ int j;
+
+ /*
+ * CSI2 interfacing: several groups can use CSI2, pick up the
+ * first one
+ */
+ asd = pcdev->pdata->asd;
+ for (j = 0; pcdev->pdata->asd_sizes[j]; j++) {
+ for (i = 0; i < pcdev->pdata->asd_sizes[j]; i++, asd++) {
+ dev_dbg(&pdev->dev, "%s(): subdev #%d, type %u\n",
+ __func__, i, (*asd)->match_type);
+ if ((*asd)->match_type == V4L2_ASYNC_MATCH_DEVNAME &&
+ !strncmp(name, (*asd)->match.device_name.name,
+ sizeof(name) - 1)) {
+ pcdev->csi2_asd = *asd;
+ break;
+ }
+ }
+ if (pcdev->csi2_asd)
+ break;
+ }
+
+ pcdev->ici.asd = pcdev->pdata->asd;
+ pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
+ }
+
+ /* Legacy CSI2 interfacing */
+ csi2 = pcdev->pdata ? pcdev->pdata->csi2 : NULL;
+ if (csi2) {
+ /*
+ * TODO: remove this once all users are converted to
+ * asynchronous CSI2 probing. If it has to be kept, csi2
+ * platform device resources have to be added, using
+ * platform_device_add_resources()
+ */
+ 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_free_ctx;
+ }
+
+ 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_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;
+ }
+
+ pcdev->csi2_sd = platform_get_drvdata(csi2_pdev);
+ }
+
+ err = soc_camera_host_register(&pcdev->ici);
+ if (err)
+ goto exit_csi2_unregister;
+
+ if (csi2) {
+ err = v4l2_device_register_subdev(&pcdev->ici.v4l2_dev,
+ pcdev->csi2_sd);
+ dev_dbg(&pdev->dev, "%s(): ret(register_subdev) = %d\n",
+ __func__, err);
+ if (err < 0)
+ goto exit_host_unregister;
+ /* v4l2_device_register_subdev() took a reference too */
+ module_put(pcdev->csi2_sd->owner);
+ }
+
+ return 0;
+
+exit_host_unregister:
+ soc_camera_host_unregister(&pcdev->ici);
+exit_csi2_unregister:
+ if (csi2) {
+ module_put(pcdev->csi2_pdev->dev.driver->owner);
+exit_pdev_unregister:
+ platform_device_del(pcdev->csi2_pdev);
+exit_pdev_put:
+ pcdev->csi2_pdev->resource = NULL;
+ platform_device_put(pcdev->csi2_pdev);
+ }
+exit_free_ctx:
+ vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
+exit_free_clk:
+ pm_runtime_disable(&pdev->dev);
+exit_release_mem:
+ if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
+ dma_release_declared_memory(&pdev->dev);
+ return err;
+}
+
+static int 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);
+ if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
+ dma_release_declared_memory(&pdev->dev);
+ 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);
+ }
+
+ 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 const struct of_device_id sh_mobile_ceu_of_match[] = {
+ { .compatible = "renesas,sh-mobile-ceu" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
+
+static struct platform_driver sh_mobile_ceu_driver = {
+ .driver = {
+ .name = "sh_mobile_ceu",
+ .pm = &sh_mobile_ceu_dev_pm_ops,
+ .of_match_table = sh_mobile_ceu_of_match,
+ },
+ .probe = sh_mobile_ceu_probe,
+ .remove = 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("0.1.0");
+MODULE_ALIAS("platform:sh_mobile_ceu");
Code Review / kvmfornfv.git / blobdiff