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* V4L2 Driver for SuperH Mobile CEU interface
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* Copyright (C) 2008 Magnus Damm
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* Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
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* Copyright (C) 2006, Sascha Hauer, Pengutronix
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/time.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/videodev2.h>
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#include <linux/pm_runtime.h>
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#include <linux/sched.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/soc_camera.h>
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#include <media/sh_mobile_ceu.h>
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#include <media/sh_mobile_csi2.h>
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#include <media/videobuf2-dma-contig.h>
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#include <media/v4l2-mediabus.h>
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#include <media/soc_mediabus.h>
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/* register offsets for sh7722 / sh7723 */
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#define CAPSR 0x00 /* Capture start register */
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#define CAPCR 0x04 /* Capture control register */
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#define CAMCR 0x08 /* Capture interface control register */
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#define CMCYR 0x0c /* Capture interface cycle register */
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#define CAMOR 0x10 /* Capture interface offset register */
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#define CAPWR 0x14 /* Capture interface width register */
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#define CAIFR 0x18 /* Capture interface input format register */
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#define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
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#define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
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#define CRCNTR 0x28 /* CEU register control register */
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#define CRCMPR 0x2c /* CEU register forcible control register */
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#define CFLCR 0x30 /* Capture filter control register */
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#define CFSZR 0x34 /* Capture filter size clip register */
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#define CDWDR 0x38 /* Capture destination width register */
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#define CDAYR 0x3c /* Capture data address Y register */
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#define CDACR 0x40 /* Capture data address C register */
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#define CDBYR 0x44 /* Capture data bottom-field address Y register */
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#define CDBCR 0x48 /* Capture data bottom-field address C register */
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#define CBDSR 0x4c /* Capture bundle destination size register */
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#define CFWCR 0x5c /* Firewall operation control register */
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#define CLFCR 0x60 /* Capture low-pass filter control register */
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#define CDOCR 0x64 /* Capture data output control register */
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#define CDDCR 0x68 /* Capture data complexity level register */
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#define CDDAR 0x6c /* Capture data complexity level address register */
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#define CEIER 0x70 /* Capture event interrupt enable register */
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#define CETCR 0x74 /* Capture event flag clear register */
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#define CSTSR 0x7c /* Capture status register */
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#define CSRTR 0x80 /* Capture software reset register */
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#define CDSSR 0x84 /* Capture data size register */
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#define CDAYR2 0x90 /* Capture data address Y register 2 */
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#define CDACR2 0x94 /* Capture data address C register 2 */
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#define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
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#define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
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#define dev_geo dev_info
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#define dev_geo dev_dbg
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/* per video frame buffer */
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struct sh_mobile_ceu_buffer {
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struct vb2_buffer vb; /* v4l buffer must be first */
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struct list_head queue;
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struct sh_mobile_ceu_dev {
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struct soc_camera_host ici;
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struct soc_camera_device *icd;
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struct platform_device *csi2_pdev;
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spinlock_t lock; /* Protects video buffer lists */
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struct list_head capture;
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struct vb2_buffer *active;
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struct vb2_alloc_ctx *alloc_ctx;
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struct sh_mobile_ceu_info *pdata;
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struct completion complete;
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enum v4l2_field field;
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unsigned int image_mode:1;
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unsigned int is_16bit:1;
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unsigned int frozen:1;
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struct sh_mobile_ceu_cam {
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/* CEU offsets within the camera output, before the CEU scaler */
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unsigned int ceu_left;
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unsigned int ceu_top;
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/* Client output, as seen by the CEU */
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* User window from S_CROP / G_CROP, produced by client cropping and
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* scaling, CEU scaling and CEU cropping, mapped back onto the client
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struct v4l2_rect subrect;
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/* Camera cropping rectangle */
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struct v4l2_rect rect;
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const struct soc_mbus_pixelfmt *extra_fmt;
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enum v4l2_mbus_pixelcode code;
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static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb)
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return container_of(vb, struct sh_mobile_ceu_buffer, vb);
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static void ceu_write(struct sh_mobile_ceu_dev *priv,
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unsigned long reg_offs, u32 data)
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iowrite32(data, priv->base + reg_offs);
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static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
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return ioread32(priv->base + reg_offs);
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static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
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struct soc_camera_device *icd = pcdev->icd;
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ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
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/* wait CSTSR.CPTON bit */
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for (i = 0; i < 1000; i++) {
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if (!(ceu_read(pcdev, CSTSR) & 1)) {
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/* wait CAPSR.CPKIL bit */
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for (i = 0; i < 1000; i++) {
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if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
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dev_warn(icd->pdev, "soft reset time out\n");
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* Videobuf operations
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* .queue_setup() is called to check, whether the driver can accept the
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* requested number of buffers and to fill in plane sizes
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* for the current frame format if required
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static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
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const struct v4l2_format *fmt,
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unsigned int *count, unsigned int *num_planes,
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unsigned int sizes[], void *alloc_ctxs[])
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struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd,
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fmt->fmt.pix.pixelformat);
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bytes_per_line = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
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height = fmt->fmt.pix.height;
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/* Called from VIDIOC_REQBUFS or in compatibility mode */
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bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
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icd->current_fmt->host_fmt);
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height = icd->user_height;
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if (bytes_per_line < 0)
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return bytes_per_line;
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sizes[0] = bytes_per_line * height;
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alloc_ctxs[0] = pcdev->alloc_ctx;
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if (!vq->num_buffers)
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/* If *num_planes != 0, we have already verified *count. */
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if (pcdev->video_limit && !*num_planes) {
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size_t size = PAGE_ALIGN(sizes[0]) * *count;
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if (size + pcdev->buf_total > pcdev->video_limit)
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*count = (pcdev->video_limit - pcdev->buf_total) /
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PAGE_ALIGN(sizes[0]);
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dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
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#define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
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#define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
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#define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
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#define CEU_CEIER_VBP (1 << 20) /* vbp error */
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#define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
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#define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
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* return value doesn't reflex the success/failure to queue the new buffer,
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* but rather the status of the previous buffer.
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static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
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struct soc_camera_device *icd = pcdev->icd;
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dma_addr_t phys_addr_top, phys_addr_bottom;
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unsigned long top1, top2;
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unsigned long bottom1, bottom2;
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* The hardware is _very_ picky about this sequence. Especially
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* the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
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* several not-so-well documented interrupt sources in CETCR.
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ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
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status = ceu_read(pcdev, CETCR);
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ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
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ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
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ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
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ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
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* When a VBP interrupt occurs, a capture end interrupt does not occur
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* and the image of that frame is not captured correctly. So, soft reset
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if (status & CEU_CEIER_VBP) {
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sh_mobile_ceu_soft_reset(pcdev);
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complete(&pcdev->complete);
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if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
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phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0);
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switch (icd->current_fmt->host_fmt->fourcc) {
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case V4L2_PIX_FMT_NV12:
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case V4L2_PIX_FMT_NV21:
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case V4L2_PIX_FMT_NV16:
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case V4L2_PIX_FMT_NV61:
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ceu_write(pcdev, top1, phys_addr_top);
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if (V4L2_FIELD_NONE != pcdev->field) {
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phys_addr_bottom = phys_addr_top + icd->user_width;
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phys_addr_bottom = phys_addr_top +
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soc_mbus_bytes_per_line(icd->user_width,
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icd->current_fmt->host_fmt);
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ceu_write(pcdev, bottom1, phys_addr_bottom);
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phys_addr_top += icd->user_width *
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ceu_write(pcdev, top2, phys_addr_top);
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if (V4L2_FIELD_NONE != pcdev->field) {
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phys_addr_bottom = phys_addr_top + icd->user_width;
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ceu_write(pcdev, bottom2, phys_addr_bottom);
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ceu_write(pcdev, CAPSR, 0x1); /* start capture */
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static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
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struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
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/* Added list head initialization on alloc */
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WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
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static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
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struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
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int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
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icd->current_fmt->host_fmt);
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if (bytes_per_line < 0)
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size = icd->user_height * bytes_per_line;
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if (vb2_plane_size(vb, 0) < size) {
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dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
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vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
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vb2_set_plane_payload(vb, 0, size);
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dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
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vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
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* This can be useful if you want to see if we actually fill
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* the buffer with something
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if (vb2_plane_vaddr(vb, 0))
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memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
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spin_lock_irq(&pcdev->lock);
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list_add_tail(&buf->queue, &pcdev->capture);
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if (!pcdev->active) {
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* Because there were no active buffer at this moment,
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* we are not interested in the return value of
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* sh_mobile_ceu_capture here.
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sh_mobile_ceu_capture(pcdev);
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spin_unlock_irq(&pcdev->lock);
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vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
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static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
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struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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spin_lock_irq(&pcdev->lock);
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if (pcdev->active == vb) {
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/* disable capture (release DMA buffer), reset */
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ceu_write(pcdev, CAPSR, 1 << 16);
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pcdev->active = NULL;
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* Doesn't hurt also if the list is empty, but it hurts, if queuing the
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* buffer failed, and .buf_init() hasn't been called
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list_del_init(&buf->queue);
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pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
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dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
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spin_unlock_irq(&pcdev->lock);
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static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
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struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
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dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
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/* This is for locking debugging only */
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INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
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static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
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struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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struct list_head *buf_head, *tmp;
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spin_lock_irq(&pcdev->lock);
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pcdev->active = NULL;
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list_for_each_safe(buf_head, tmp, &pcdev->capture)
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list_del_init(buf_head);
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spin_unlock_irq(&pcdev->lock);
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return sh_mobile_ceu_soft_reset(pcdev);
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static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
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.queue_setup = sh_mobile_ceu_videobuf_setup,
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.buf_prepare = sh_mobile_ceu_videobuf_prepare,
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.buf_queue = sh_mobile_ceu_videobuf_queue,
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.buf_cleanup = sh_mobile_ceu_videobuf_release,
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.buf_init = sh_mobile_ceu_videobuf_init,
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.wait_prepare = soc_camera_unlock,
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.wait_finish = soc_camera_lock,
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.stop_streaming = sh_mobile_ceu_stop_streaming,
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static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
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struct sh_mobile_ceu_dev *pcdev = data;
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struct vb2_buffer *vb;
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spin_lock(&pcdev->lock);
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/* Stale interrupt from a released buffer */
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list_del_init(&to_ceu_vb(vb)->queue);
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if (!list_empty(&pcdev->capture))
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pcdev->active = &list_entry(pcdev->capture.next,
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struct sh_mobile_ceu_buffer, queue)->vb;
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pcdev->active = NULL;
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ret = sh_mobile_ceu_capture(pcdev);
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do_gettimeofday(&vb->v4l2_buf.timestamp);
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vb->v4l2_buf.field = pcdev->field;
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vb->v4l2_buf.sequence = pcdev->sequence++;
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vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
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spin_unlock(&pcdev->lock);
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static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
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struct v4l2_subdev *sd;
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if (!pcdev->csi2_pdev)
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v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
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if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
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/* Called with .video_lock held */
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static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
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struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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struct v4l2_subdev *csi2_sd;
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dev_info(icd->parent,
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"SuperH Mobile CEU driver attached to camera %d\n",
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pm_runtime_get_sync(ici->v4l2_dev.dev);
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pcdev->buf_total = 0;
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ret = sh_mobile_ceu_soft_reset(pcdev);
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csi2_sd = find_csi2(pcdev);
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csi2_sd->grp_id = soc_camera_grp_id(icd);
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v4l2_set_subdev_hostdata(csi2_sd, icd);
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ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
575
if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
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pm_runtime_put_sync(ici->v4l2_dev.dev);
581
* -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
582
* has not found this soc-camera device among its clients
584
if (ret == -ENODEV && csi2_sd)
591
/* Called with .video_lock held */
592
static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
594
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
595
struct sh_mobile_ceu_dev *pcdev = ici->priv;
596
struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
598
BUG_ON(icd != pcdev->icd);
600
v4l2_subdev_call(csi2_sd, core, s_power, 0);
603
/* disable capture, disable interrupts */
604
ceu_write(pcdev, CEIER, 0);
605
sh_mobile_ceu_soft_reset(pcdev);
607
/* make sure active buffer is canceled */
608
spin_lock_irq(&pcdev->lock);
610
list_del_init(&to_ceu_vb(pcdev->active)->queue);
611
vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
612
pcdev->active = NULL;
614
spin_unlock_irq(&pcdev->lock);
616
pm_runtime_put_sync(ici->v4l2_dev.dev);
618
dev_info(icd->parent,
619
"SuperH Mobile CEU driver detached from camera %d\n",
626
* See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
627
* in SH7722 Hardware Manual
629
static unsigned int size_dst(unsigned int src, unsigned int scale)
631
unsigned int mant_pre = scale >> 12;
634
return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
635
mant_pre * 4096 / scale + 1;
638
static u16 calc_scale(unsigned int src, unsigned int *dst)
645
scale = (src * 4096 / *dst) & ~7;
647
while (scale > 4096 && size_dst(src, scale) < *dst)
650
*dst = size_dst(src, scale);
655
/* rect is guaranteed to not exceed the scaled camera rectangle */
656
static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
658
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
659
struct sh_mobile_ceu_cam *cam = icd->host_priv;
660
struct sh_mobile_ceu_dev *pcdev = ici->priv;
661
unsigned int height, width, cdwdr_width, in_width, in_height;
662
unsigned int left_offset, top_offset;
665
dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
666
icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
668
left_offset = cam->ceu_left;
669
top_offset = cam->ceu_top;
671
WARN_ON(icd->user_width & 3 || icd->user_height & 3);
673
width = icd->user_width;
675
if (pcdev->image_mode) {
676
in_width = cam->width;
677
if (!pcdev->is_16bit) {
683
int bytes_per_line = soc_mbus_bytes_per_line(width,
684
icd->current_fmt->host_fmt);
685
unsigned int w_factor;
687
switch (icd->current_fmt->host_fmt->packing) {
688
case SOC_MBUS_PACKING_2X8_PADHI:
695
in_width = cam->width * w_factor;
696
left_offset *= w_factor;
698
if (bytes_per_line < 0)
701
cdwdr_width = bytes_per_line;
704
height = icd->user_height;
705
in_height = cam->height;
706
if (V4L2_FIELD_NONE != pcdev->field) {
707
height = (height / 2) & ~3;
713
/* CSI2 special configuration */
714
if (pcdev->pdata->csi2) {
715
in_width = ((in_width - 2) * 2);
719
/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
720
camor = left_offset | (top_offset << 16);
723
"CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
724
(in_height << 16) | in_width, (height << 16) | width,
727
ceu_write(pcdev, CAMOR, camor);
728
ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
729
/* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
730
ceu_write(pcdev, CFSZR, (height << 16) | width);
731
ceu_write(pcdev, CDWDR, cdwdr_width);
734
static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
736
u32 capsr = ceu_read(pcdev, CAPSR);
737
ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
741
static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
743
unsigned long timeout = jiffies + 10 * HZ;
746
* Wait until the end of the current frame. It can take a long time,
747
* but if it has been aborted by a CAPSR reset, it shoule exit sooner.
749
while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
752
if (time_after(jiffies, timeout)) {
753
dev_err(pcdev->ici.v4l2_dev.dev,
754
"Timeout waiting for frame end! Interface problem?\n");
758
/* Wait until reset clears, this shall not hang... */
759
while (ceu_read(pcdev, CAPSR) & (1 << 16))
762
/* Anything to restore? */
763
if (capsr & ~(1 << 16))
764
ceu_write(pcdev, CAPSR, capsr);
767
/* Find the bus subdevice driver, e.g., CSI2 */
768
static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
769
struct soc_camera_device *icd)
771
if (pcdev->csi2_pdev) {
772
struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
773
if (csi2_sd && csi2_sd->grp_id == soc_camera_grp_id(icd))
777
return soc_camera_to_subdev(icd);
780
#define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
781
V4L2_MBUS_PCLK_SAMPLE_RISING | \
782
V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
783
V4L2_MBUS_HSYNC_ACTIVE_LOW | \
784
V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
785
V4L2_MBUS_VSYNC_ACTIVE_LOW | \
786
V4L2_MBUS_DATA_ACTIVE_HIGH)
788
/* Capture is not running, no interrupts, no locking needed */
789
static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
792
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
793
struct sh_mobile_ceu_dev *pcdev = ici->priv;
794
struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
795
struct sh_mobile_ceu_cam *cam = icd->host_priv;
796
struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
797
unsigned long value, common_flags = CEU_BUS_FLAGS;
798
u32 capsr = capture_save_reset(pcdev);
799
unsigned int yuv_lineskip;
803
* If the client doesn't implement g_mbus_config, we just use our
806
ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
808
common_flags = soc_mbus_config_compatible(&cfg,
812
} else if (ret != -ENOIOCTLCMD) {
816
/* Make choises, based on platform preferences */
817
if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
818
(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
819
if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
820
common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
822
common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
825
if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
826
(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
827
if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
828
common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
830
common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
833
cfg.flags = common_flags;
834
ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
835
if (ret < 0 && ret != -ENOIOCTLCMD)
838
if (icd->current_fmt->host_fmt->bits_per_sample > 8)
843
ceu_write(pcdev, CRCNTR, 0);
844
ceu_write(pcdev, CRCMPR, 0);
846
value = 0x00000010; /* data fetch by default */
849
switch (icd->current_fmt->host_fmt->fourcc) {
850
case V4L2_PIX_FMT_NV12:
851
case V4L2_PIX_FMT_NV21:
852
/* convert 4:2:2 -> 4:2:0 */
853
yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
855
case V4L2_PIX_FMT_NV16:
856
case V4L2_PIX_FMT_NV61:
858
case V4L2_MBUS_FMT_UYVY8_2X8:
859
value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
861
case V4L2_MBUS_FMT_VYUY8_2X8:
862
value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
864
case V4L2_MBUS_FMT_YUYV8_2X8:
865
value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
867
case V4L2_MBUS_FMT_YVYU8_2X8:
868
value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
875
if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
876
icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
877
value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
879
value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
880
value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
881
value |= pcdev->is_16bit ? 1 << 12 : 0;
884
if (pcdev->pdata->csi2)
887
ceu_write(pcdev, CAMCR, value);
889
ceu_write(pcdev, CAPCR, 0x00300000);
891
switch (pcdev->field) {
892
case V4L2_FIELD_INTERLACED_TB:
895
case V4L2_FIELD_INTERLACED_BT:
902
ceu_write(pcdev, CAIFR, value);
904
sh_mobile_ceu_set_rect(icd);
907
dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
908
ceu_write(pcdev, CFLCR, pcdev->cflcr);
911
* A few words about byte order (observed in Big Endian mode)
913
* In data fetch mode bytes are received in chunks of 8 bytes.
914
* D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
916
* The data is however by default written to memory in reverse order:
917
* D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
919
* The lowest three bits of CDOCR allows us to do swapping,
920
* using 7 we swap the data bytes to match the incoming order:
921
* D0, D1, D2, D3, D4, D5, D6, D7
923
value = 0x00000007 | yuv_lineskip;
925
ceu_write(pcdev, CDOCR, value);
926
ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
928
dev_dbg(icd->parent, "S_FMT successful for %c%c%c%c %ux%u\n",
929
pixfmt & 0xff, (pixfmt >> 8) & 0xff,
930
(pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
931
icd->user_width, icd->user_height);
933
capture_restore(pcdev, capsr);
935
/* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
939
static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
940
unsigned char buswidth)
942
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
943
struct sh_mobile_ceu_dev *pcdev = ici->priv;
944
struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
945
unsigned long common_flags = CEU_BUS_FLAGS;
946
struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
949
ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
951
common_flags = soc_mbus_config_compatible(&cfg,
953
else if (ret != -ENOIOCTLCMD)
956
if (!common_flags || buswidth > 16)
962
static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
964
.fourcc = V4L2_PIX_FMT_NV12,
966
.bits_per_sample = 8,
967
.packing = SOC_MBUS_PACKING_1_5X8,
968
.order = SOC_MBUS_ORDER_LE,
970
.fourcc = V4L2_PIX_FMT_NV21,
972
.bits_per_sample = 8,
973
.packing = SOC_MBUS_PACKING_1_5X8,
974
.order = SOC_MBUS_ORDER_LE,
976
.fourcc = V4L2_PIX_FMT_NV16,
978
.bits_per_sample = 8,
979
.packing = SOC_MBUS_PACKING_2X8_PADHI,
980
.order = SOC_MBUS_ORDER_LE,
982
.fourcc = V4L2_PIX_FMT_NV61,
984
.bits_per_sample = 8,
985
.packing = SOC_MBUS_PACKING_2X8_PADHI,
986
.order = SOC_MBUS_ORDER_LE,
990
/* This will be corrected as we get more formats */
991
static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
993
return fmt->packing == SOC_MBUS_PACKING_NONE ||
994
(fmt->bits_per_sample == 8 &&
995
fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
996
(fmt->bits_per_sample == 8 &&
997
fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
998
(fmt->bits_per_sample > 8 &&
999
fmt->packing == SOC_MBUS_PACKING_EXTEND16);
1002
static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
1004
static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
1006
return container_of(ctrl->handler, struct soc_camera_device,
1010
static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
1012
struct soc_camera_device *icd = ctrl_to_icd(ctrl);
1013
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1014
struct sh_mobile_ceu_dev *pcdev = ici->priv;
1017
case V4L2_CID_SHARPNESS:
1018
switch (icd->current_fmt->host_fmt->fourcc) {
1019
case V4L2_PIX_FMT_NV12:
1020
case V4L2_PIX_FMT_NV21:
1021
case V4L2_PIX_FMT_NV16:
1022
case V4L2_PIX_FMT_NV61:
1023
ceu_write(pcdev, CLFCR, !ctrl->val);
1032
static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
1033
.s_ctrl = sh_mobile_ceu_s_ctrl,
1036
static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
1037
struct soc_camera_format_xlate *xlate)
1039
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1040
struct device *dev = icd->parent;
1041
struct soc_camera_host *ici = to_soc_camera_host(dev);
1042
struct sh_mobile_ceu_dev *pcdev = ici->priv;
1045
struct sh_mobile_ceu_cam *cam;
1046
enum v4l2_mbus_pixelcode code;
1047
const struct soc_mbus_pixelfmt *fmt;
1049
ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
1051
/* No more formats */
1054
fmt = soc_mbus_get_fmtdesc(code);
1056
dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
1060
if (!pcdev->pdata->csi2) {
1061
/* Are there any restrictions in the CSI-2 case? */
1062
ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
1067
if (!icd->host_priv) {
1068
struct v4l2_mbus_framefmt mf;
1069
struct v4l2_rect rect;
1072
/* Add our control */
1073
v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
1074
V4L2_CID_SHARPNESS, 0, 1, 1, 0);
1075
if (icd->ctrl_handler.error)
1076
return icd->ctrl_handler.error;
1078
/* FIXME: subwindow is lost between close / open */
1080
/* Cache current client geometry */
1081
ret = client_g_rect(sd, &rect);
1086
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1090
while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
1091
/* Try 2560x1920, 1280x960, 640x480, 320x240 */
1092
mf.width = 2560 >> shift;
1093
mf.height = 1920 >> shift;
1094
ret = v4l2_device_call_until_err(sd->v4l2_dev,
1095
soc_camera_grp_id(icd), video,
1103
dev_err(dev, "Failed to configure the client below %ux%x\n",
1104
mf.width, mf.height);
1108
dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
1110
cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1114
/* We are called with current camera crop, initialise subrect with it */
1116
cam->subrect = rect;
1118
cam->width = mf.width;
1119
cam->height = mf.height;
1121
icd->host_priv = cam;
1123
cam = icd->host_priv;
1126
/* Beginning of a pass */
1128
cam->extra_fmt = NULL;
1131
case V4L2_MBUS_FMT_UYVY8_2X8:
1132
case V4L2_MBUS_FMT_VYUY8_2X8:
1133
case V4L2_MBUS_FMT_YUYV8_2X8:
1134
case V4L2_MBUS_FMT_YVYU8_2X8:
1139
* Our case is simple so far: for any of the above four camera
1140
* formats we add all our four synthesized NV* formats, so,
1141
* just marking the device with a single flag suffices. If
1142
* the format generation rules are more complex, you would have
1143
* to actually hang your already added / counted formats onto
1144
* the host_priv pointer and check whether the format you're
1145
* going to add now is already there.
1147
cam->extra_fmt = sh_mobile_ceu_formats;
1149
n = ARRAY_SIZE(sh_mobile_ceu_formats);
1151
for (k = 0; xlate && k < n; k++) {
1152
xlate->host_fmt = &sh_mobile_ceu_formats[k];
1155
dev_dbg(dev, "Providing format %s using code %d\n",
1156
sh_mobile_ceu_formats[k].name, code);
1160
if (!sh_mobile_ceu_packing_supported(fmt))
1164
/* Generic pass-through */
1167
xlate->host_fmt = fmt;
1170
dev_dbg(dev, "Providing format %s in pass-through mode\n",
1177
static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1179
kfree(icd->host_priv);
1180
icd->host_priv = NULL;
1183
/* Check if any dimension of r1 is smaller than respective one of r2 */
1184
static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1186
return r1->width < r2->width || r1->height < r2->height;
1189
/* Check if r1 fails to cover r2 */
1190
static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1192
return r1->left > r2->left || r1->top > r2->top ||
1193
r1->left + r1->width < r2->left + r2->width ||
1194
r1->top + r1->height < r2->top + r2->height;
1197
static unsigned int scale_down(unsigned int size, unsigned int scale)
1199
return (size * 4096 + scale / 2) / scale;
1202
static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1204
return (input * 4096 + output / 2) / output;
1207
/* Get and store current client crop */
1208
static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1210
struct v4l2_crop crop;
1211
struct v4l2_cropcap cap;
1214
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1216
ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1222
/* Camera driver doesn't support .g_crop(), assume default rectangle */
1223
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1225
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1227
*rect = cap.defrect;
1232
/* Client crop has changed, update our sub-rectangle to remain within the area */
1233
static void update_subrect(struct sh_mobile_ceu_cam *cam)
1235
struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1237
if (rect->width < subrect->width)
1238
subrect->width = rect->width;
1240
if (rect->height < subrect->height)
1241
subrect->height = rect->height;
1243
if (rect->left > subrect->left)
1244
subrect->left = rect->left;
1245
else if (rect->left + rect->width >
1246
subrect->left + subrect->width)
1247
subrect->left = rect->left + rect->width -
1250
if (rect->top > subrect->top)
1251
subrect->top = rect->top;
1252
else if (rect->top + rect->height >
1253
subrect->top + subrect->height)
1254
subrect->top = rect->top + rect->height -
1259
* The common for both scaling and cropping iterative approach is:
1260
* 1. try if the client can produce exactly what requested by the user
1261
* 2. if (1) failed, try to double the client image until we get one big enough
1262
* 3. if (2) failed, try to request the maximum image
1264
static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1265
struct v4l2_crop *cam_crop)
1267
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1268
struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1269
struct device *dev = sd->v4l2_dev->dev;
1270
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1271
struct v4l2_cropcap cap;
1273
unsigned int width, height;
1275
v4l2_subdev_call(sd, video, s_crop, crop);
1276
ret = client_g_rect(sd, cam_rect);
1281
* Now cam_crop contains the current camera input rectangle, and it must
1282
* be within camera cropcap bounds
1284
if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1285
/* Even if camera S_CROP failed, but camera rectangle matches */
1286
dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1287
rect->width, rect->height, rect->left, rect->top);
1288
cam->rect = *cam_rect;
1292
/* Try to fix cropping, that camera hasn't managed to set */
1293
dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1294
cam_rect->width, cam_rect->height,
1295
cam_rect->left, cam_rect->top,
1296
rect->width, rect->height, rect->left, rect->top);
1298
/* We need sensor maximum rectangle */
1299
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1303
/* Put user requested rectangle within sensor bounds */
1304
soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1306
soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1310
* Popular special case - some cameras can only handle fixed sizes like
1311
* QVGA, VGA,... Take care to avoid infinite loop.
1313
width = max(cam_rect->width, 2);
1314
height = max(cam_rect->height, 2);
1317
* Loop as long as sensor is not covering the requested rectangle and
1318
* is still within its bounds
1320
while (!ret && (is_smaller(cam_rect, rect) ||
1321
is_inside(cam_rect, rect)) &&
1322
(cap.bounds.width > width || cap.bounds.height > height)) {
1327
cam_rect->width = width;
1328
cam_rect->height = height;
1331
* We do not know what capabilities the camera has to set up
1332
* left and top borders. We could try to be smarter in iterating
1333
* them, e.g., if camera current left is to the right of the
1334
* target left, set it to the middle point between the current
1335
* left and minimum left. But that would add too much
1336
* complexity: we would have to iterate each border separately.
1337
* Instead we just drop to the left and top bounds.
1339
if (cam_rect->left > rect->left)
1340
cam_rect->left = cap.bounds.left;
1342
if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1343
cam_rect->width = rect->left + rect->width -
1346
if (cam_rect->top > rect->top)
1347
cam_rect->top = cap.bounds.top;
1349
if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1350
cam_rect->height = rect->top + rect->height -
1353
v4l2_subdev_call(sd, video, s_crop, cam_crop);
1354
ret = client_g_rect(sd, cam_rect);
1355
dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1356
cam_rect->width, cam_rect->height,
1357
cam_rect->left, cam_rect->top);
1360
/* S_CROP must not modify the rectangle */
1361
if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1363
* The camera failed to configure a suitable cropping,
1364
* we cannot use the current rectangle, set to max
1366
*cam_rect = cap.bounds;
1367
v4l2_subdev_call(sd, video, s_crop, cam_crop);
1368
ret = client_g_rect(sd, cam_rect);
1369
dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1370
cam_rect->width, cam_rect->height,
1371
cam_rect->left, cam_rect->top);
1375
cam->rect = *cam_rect;
1376
update_subrect(cam);
1382
/* Iterative s_mbus_fmt, also updates cached client crop on success */
1383
static int client_s_fmt(struct soc_camera_device *icd,
1384
struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1386
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1387
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1388
struct device *dev = icd->parent;
1389
unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1390
unsigned int max_width, max_height;
1391
struct v4l2_cropcap cap;
1395
ret = v4l2_device_call_until_err(sd->v4l2_dev,
1396
soc_camera_grp_id(icd), video,
1401
dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1403
if (width == mf->width && height == mf->height) {
1404
/* Perfect! The client has done it all. */
1413
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1415
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1419
max_width = min(cap.bounds.width, 2560);
1420
max_height = min(cap.bounds.height, 1920);
1422
/* Camera set a format, but geometry is not precise, try to improve */
1426
/* width <= max_width && height <= max_height - guaranteed by try_fmt */
1427
while ((width > tmp_w || height > tmp_h) &&
1428
tmp_w < max_width && tmp_h < max_height) {
1429
tmp_w = min(2 * tmp_w, max_width);
1430
tmp_h = min(2 * tmp_h, max_height);
1433
ret = v4l2_device_call_until_err(sd->v4l2_dev,
1434
soc_camera_grp_id(icd), video,
1436
dev_geo(dev, "Camera scaled to %ux%u\n",
1437
mf->width, mf->height);
1439
/* This shouldn't happen */
1440
dev_err(dev, "Client failed to set format: %d\n", ret);
1447
ret = client_g_rect(sd, &cam->rect);
1452
cam->subrect = cam->rect;
1454
update_subrect(cam);
1460
* @width - on output: user width, mapped back to input
1461
* @height - on output: user height, mapped back to input
1462
* @mf - in- / output camera output window
1464
static int client_scale(struct soc_camera_device *icd,
1465
struct v4l2_mbus_framefmt *mf,
1466
unsigned int *width, unsigned int *height,
1469
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1470
struct device *dev = icd->parent;
1471
struct v4l2_mbus_framefmt mf_tmp = *mf;
1472
unsigned int scale_h, scale_v;
1476
* 5. Apply iterative camera S_FMT for camera user window (also updates
1477
* client crop cache and the imaginary sub-rectangle).
1479
ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1483
dev_geo(dev, "5: camera scaled to %ux%u\n",
1484
mf_tmp.width, mf_tmp.height);
1486
/* 6. Retrieve camera output window (g_fmt) */
1488
/* unneeded - it is already in "mf_tmp" */
1490
/* 7. Calculate new client scales. */
1491
scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1492
scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1494
mf->width = mf_tmp.width;
1495
mf->height = mf_tmp.height;
1496
mf->colorspace = mf_tmp.colorspace;
1499
* 8. Calculate new CEU crop - apply camera scales to previously
1500
* updated "effective" crop.
1502
*width = scale_down(cam->subrect.width, scale_h);
1503
*height = scale_down(cam->subrect.height, scale_v);
1505
dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1511
* CEU can scale and crop, but we don't want to waste bandwidth and kill the
1512
* framerate by always requesting the maximum image from the client. See
1513
* Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1514
* scaling and cropping algorithms and for the meaning of referenced here steps.
1516
static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1517
struct v4l2_crop *a)
1519
struct v4l2_rect *rect = &a->c;
1520
struct device *dev = icd->parent;
1521
struct soc_camera_host *ici = to_soc_camera_host(dev);
1522
struct sh_mobile_ceu_dev *pcdev = ici->priv;
1523
struct v4l2_crop cam_crop;
1524
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1525
struct v4l2_rect *cam_rect = &cam_crop.c;
1526
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1527
struct v4l2_mbus_framefmt mf;
1528
unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1529
out_width, out_height;
1530
int interm_width, interm_height;
1534
dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1535
rect->left, rect->top);
1537
/* During camera cropping its output window can change too, stop CEU */
1538
capsr = capture_save_reset(pcdev);
1539
dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1542
* 1. - 2. Apply iterative camera S_CROP for new input window, read back
1543
* actual camera rectangle.
1545
ret = client_s_crop(icd, a, &cam_crop);
1549
dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1550
cam_rect->width, cam_rect->height,
1551
cam_rect->left, cam_rect->top);
1553
/* On success cam_crop contains current camera crop */
1555
/* 3. Retrieve camera output window */
1556
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1560
if (mf.width > 2560 || mf.height > 1920)
1563
/* 4. Calculate camera scales */
1564
scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1565
scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1567
/* Calculate intermediate window */
1568
interm_width = scale_down(rect->width, scale_cam_h);
1569
interm_height = scale_down(rect->height, scale_cam_v);
1571
if (interm_width < icd->user_width) {
1574
new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1576
mf.width = scale_down(cam_rect->width, new_scale_h);
1579
if (interm_height < icd->user_height) {
1582
new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1584
mf.height = scale_down(cam_rect->height, new_scale_v);
1587
if (interm_width < icd->user_width || interm_height < icd->user_height) {
1588
ret = v4l2_device_call_until_err(sd->v4l2_dev,
1589
soc_camera_grp_id(icd), video,
1594
dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height);
1595
scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1596
scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1597
interm_width = scale_down(rect->width, scale_cam_h);
1598
interm_height = scale_down(rect->height, scale_cam_v);
1601
/* Cache camera output window */
1602
cam->width = mf.width;
1603
cam->height = mf.height;
1605
if (pcdev->image_mode) {
1606
out_width = min(interm_width, icd->user_width);
1607
out_height = min(interm_height, icd->user_height);
1609
out_width = interm_width;
1610
out_height = interm_height;
1614
* 5. Calculate CEU scales from camera scales from results of (5) and
1617
scale_ceu_h = calc_scale(interm_width, &out_width);
1618
scale_ceu_v = calc_scale(interm_height, &out_height);
1620
dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1622
/* Apply CEU scales. */
1623
cflcr = scale_ceu_h | (scale_ceu_v << 16);
1624
if (cflcr != pcdev->cflcr) {
1625
pcdev->cflcr = cflcr;
1626
ceu_write(pcdev, CFLCR, cflcr);
1629
icd->user_width = out_width & ~3;
1630
icd->user_height = out_height & ~3;
1631
/* Offsets are applied at the CEU scaling filter input */
1632
cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1633
cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1635
/* 6. Use CEU cropping to crop to the new window. */
1636
sh_mobile_ceu_set_rect(icd);
1638
cam->subrect = *rect;
1640
dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1641
icd->user_width, icd->user_height,
1642
cam->ceu_left, cam->ceu_top);
1644
/* Restore capture. The CE bit can be cleared by the hardware */
1647
capture_restore(pcdev, capsr);
1649
/* Even if only camera cropping succeeded */
1653
static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1654
struct v4l2_crop *a)
1656
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1658
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1659
a->c = cam->subrect;
1665
* Calculate real client output window by applying new scales to the current
1666
* client crop. New scales are calculated from the requested output format and
1667
* CEU crop, mapped backed onto the client input (subrect).
1669
static void calculate_client_output(struct soc_camera_device *icd,
1670
const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1672
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1673
struct device *dev = icd->parent;
1674
struct v4l2_rect *cam_subrect = &cam->subrect;
1675
unsigned int scale_v, scale_h;
1677
if (cam_subrect->width == cam->rect.width &&
1678
cam_subrect->height == cam->rect.height) {
1679
/* No sub-cropping */
1680
mf->width = pix->width;
1681
mf->height = pix->height;
1685
/* 1.-2. Current camera scales and subwin - cached. */
1687
dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1688
cam_subrect->width, cam_subrect->height,
1689
cam_subrect->left, cam_subrect->top);
1692
* 3. Calculate new combined scales from input sub-window to requested
1697
* TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1698
* (128x96) or larger than VGA
1700
scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1701
scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1703
dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1706
* 4. Calculate desired client output window by applying combined scales
1707
* to client (real) input window.
1709
mf->width = scale_down(cam->rect.width, scale_h);
1710
mf->height = scale_down(cam->rect.height, scale_v);
1713
/* Similar to set_crop multistage iterative algorithm */
1714
static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1715
struct v4l2_format *f)
1717
struct device *dev = icd->parent;
1718
struct soc_camera_host *ici = to_soc_camera_host(dev);
1719
struct sh_mobile_ceu_dev *pcdev = ici->priv;
1720
struct sh_mobile_ceu_cam *cam = icd->host_priv;
1721
struct v4l2_pix_format *pix = &f->fmt.pix;
1722
struct v4l2_mbus_framefmt mf;
1723
__u32 pixfmt = pix->pixelformat;
1724
const struct soc_camera_format_xlate *xlate;
1725
/* Keep Compiler Happy */
1726
unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1727
u16 scale_v, scale_h;
1730
enum v4l2_field field;
1732
switch (pix->field) {
1734
pix->field = V4L2_FIELD_NONE;
1736
case V4L2_FIELD_INTERLACED_TB:
1737
case V4L2_FIELD_INTERLACED_BT:
1738
case V4L2_FIELD_NONE:
1741
case V4L2_FIELD_INTERLACED:
1742
field = V4L2_FIELD_INTERLACED_TB;
1746
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1748
dev_warn(dev, "Format %x not found\n", pixfmt);
1752
/* 1.-4. Calculate desired client output geometry */
1753
calculate_client_output(icd, pix, &mf);
1754
mf.field = pix->field;
1755
mf.colorspace = pix->colorspace;
1756
mf.code = xlate->code;
1759
case V4L2_PIX_FMT_NV12:
1760
case V4L2_PIX_FMT_NV21:
1761
case V4L2_PIX_FMT_NV16:
1762
case V4L2_PIX_FMT_NV61:
1769
dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1770
pix->width, pix->height);
1772
dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1775
ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1776
image_mode && V4L2_FIELD_NONE == field);
1778
dev_geo(dev, "5-9: client scale return %d\n", ret);
1780
/* Done with the camera. Now see if we can improve the result */
1782
dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1783
mf.width, mf.height, pix->width, pix->height);
1787
if (mf.code != xlate->code)
1790
/* 9. Prepare CEU crop */
1791
cam->width = mf.width;
1792
cam->height = mf.height;
1794
/* 10. Use CEU scaling to scale to the requested user window. */
1796
/* We cannot scale up */
1797
if (pix->width > ceu_sub_width)
1798
ceu_sub_width = pix->width;
1800
if (pix->height > ceu_sub_height)
1801
ceu_sub_height = pix->height;
1803
pix->colorspace = mf.colorspace;
1806
/* Scale pix->{width x height} down to width x height */
1807
scale_h = calc_scale(ceu_sub_width, &pix->width);
1808
scale_v = calc_scale(ceu_sub_height, &pix->height);
1810
pix->width = ceu_sub_width;
1811
pix->height = ceu_sub_height;
1816
pcdev->cflcr = scale_h | (scale_v << 16);
1819
* We have calculated CFLCR, the actual configuration will be performed
1820
* in sh_mobile_ceu_set_bus_param()
1823
dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1824
ceu_sub_width, scale_h, pix->width,
1825
ceu_sub_height, scale_v, pix->height);
1827
cam->code = xlate->code;
1828
icd->current_fmt = xlate;
1830
pcdev->field = field;
1831
pcdev->image_mode = image_mode;
1833
/* CFSZR requirement */
1840
static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1841
struct v4l2_format *f)
1843
const struct soc_camera_format_xlate *xlate;
1844
struct v4l2_pix_format *pix = &f->fmt.pix;
1845
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1846
struct v4l2_mbus_framefmt mf;
1847
__u32 pixfmt = pix->pixelformat;
1851
dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1852
pixfmt, pix->width, pix->height);
1854
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1856
dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1860
/* FIXME: calculate using depth and bus width */
1862
/* CFSZR requires height and width to be 4-pixel aligned */
1863
v4l_bound_align_image(&pix->width, 2, 2560, 2,
1864
&pix->height, 4, 1920, 2, 0);
1867
height = pix->height;
1869
/* limit to sensor capabilities */
1870
mf.width = pix->width;
1871
mf.height = pix->height;
1872
mf.field = pix->field;
1873
mf.code = xlate->code;
1874
mf.colorspace = pix->colorspace;
1876
ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1877
video, try_mbus_fmt, &mf);
1881
pix->width = mf.width;
1882
pix->height = mf.height;
1883
pix->field = mf.field;
1884
pix->colorspace = mf.colorspace;
1887
case V4L2_PIX_FMT_NV12:
1888
case V4L2_PIX_FMT_NV21:
1889
case V4L2_PIX_FMT_NV16:
1890
case V4L2_PIX_FMT_NV61:
1891
/* FIXME: check against rect_max after converting soc-camera */
1892
/* We can scale precisely, need a bigger image from camera */
1893
if (pix->width < width || pix->height < height) {
1895
* We presume, the sensor behaves sanely, i.e., if
1896
* requested a bigger rectangle, it will not return a
1901
ret = v4l2_device_call_until_err(sd->v4l2_dev,
1902
soc_camera_grp_id(icd), video,
1905
/* Shouldn't actually happen... */
1906
dev_err(icd->parent,
1907
"FIXME: client try_fmt() = %d\n", ret);
1911
/* We will scale exactly */
1912
if (mf.width > width)
1914
if (mf.height > height)
1915
pix->height = height;
1921
dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1922
__func__, ret, pix->pixelformat, pix->width, pix->height);
1927
static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1928
struct v4l2_crop *a)
1930
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1931
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1932
struct sh_mobile_ceu_dev *pcdev = ici->priv;
1933
u32 out_width = icd->user_width, out_height = icd->user_height;
1938
/* Wait for frame */
1939
ret = wait_for_completion_interruptible(&pcdev->complete);
1940
/* Stop the client */
1941
ret = v4l2_subdev_call(sd, video, s_stream, 0);
1943
dev_warn(icd->parent,
1944
"Client failed to stop the stream: %d\n", ret);
1946
/* Do the crop, if it fails, there's nothing more we can do */
1947
sh_mobile_ceu_set_crop(icd, a);
1949
dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1951
if (icd->user_width != out_width || icd->user_height != out_height) {
1952
struct v4l2_format f = {
1953
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1956
.height = out_height,
1957
.pixelformat = icd->current_fmt->host_fmt->fourcc,
1958
.field = pcdev->field,
1959
.colorspace = icd->colorspace,
1962
ret = sh_mobile_ceu_set_fmt(icd, &f);
1963
if (!ret && (out_width != f.fmt.pix.width ||
1964
out_height != f.fmt.pix.height))
1967
icd->user_width = out_width & ~3;
1968
icd->user_height = out_height & ~3;
1969
ret = sh_mobile_ceu_set_bus_param(icd,
1970
icd->current_fmt->host_fmt->fourcc);
1974
/* Thaw the queue */
1976
spin_lock_irq(&pcdev->lock);
1977
sh_mobile_ceu_capture(pcdev);
1978
spin_unlock_irq(&pcdev->lock);
1979
/* Start the client */
1980
ret = v4l2_subdev_call(sd, video, s_stream, 1);
1984
static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1986
struct soc_camera_device *icd = file->private_data;
1988
return vb2_poll(&icd->vb2_vidq, file, pt);
1991
static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1992
struct v4l2_capability *cap)
1994
strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1995
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1999
static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
2000
struct soc_camera_device *icd)
2002
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2003
q->io_modes = VB2_MMAP | VB2_USERPTR;
2005
q->ops = &sh_mobile_ceu_videobuf_ops;
2006
q->mem_ops = &vb2_dma_contig_memops;
2007
q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
2009
return vb2_queue_init(q);
2012
static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
2013
.owner = THIS_MODULE,
2014
.add = sh_mobile_ceu_add_device,
2015
.remove = sh_mobile_ceu_remove_device,
2016
.get_formats = sh_mobile_ceu_get_formats,
2017
.put_formats = sh_mobile_ceu_put_formats,
2018
.get_crop = sh_mobile_ceu_get_crop,
2019
.set_crop = sh_mobile_ceu_set_crop,
2020
.set_livecrop = sh_mobile_ceu_set_livecrop,
2021
.set_fmt = sh_mobile_ceu_set_fmt,
2022
.try_fmt = sh_mobile_ceu_try_fmt,
2023
.poll = sh_mobile_ceu_poll,
2024
.querycap = sh_mobile_ceu_querycap,
2025
.set_bus_param = sh_mobile_ceu_set_bus_param,
2026
.init_videobuf2 = sh_mobile_ceu_init_videobuf,
2030
struct notifier_block notifier;
2031
struct completion completion;
2035
static int bus_notify(struct notifier_block *nb,
2036
unsigned long action, void *data)
2038
struct device *dev = data;
2039
struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
2041
if (wait->dev != dev)
2045
case BUS_NOTIFY_UNBOUND_DRIVER:
2046
/* Protect from module unloading */
2047
wait_for_completion(&wait->completion);
2053
static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
2055
struct sh_mobile_ceu_dev *pcdev;
2056
struct resource *res;
2060
struct bus_wait wait = {
2061
.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
2062
.notifier.notifier_call = bus_notify,
2064
struct sh_mobile_ceu_companion *csi2;
2066
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2067
irq = platform_get_irq(pdev, 0);
2068
if (!res || (int)irq <= 0) {
2069
dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
2074
pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
2076
dev_err(&pdev->dev, "Could not allocate pcdev\n");
2081
INIT_LIST_HEAD(&pcdev->capture);
2082
spin_lock_init(&pcdev->lock);
2083
init_completion(&pcdev->complete);
2085
pcdev->pdata = pdev->dev.platform_data;
2086
if (!pcdev->pdata) {
2088
dev_err(&pdev->dev, "CEU platform data not set.\n");
2092
base = ioremap_nocache(res->start, resource_size(res));
2095
dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
2101
pcdev->video_limit = 0; /* only enabled if second resource exists */
2103
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2105
err = dma_declare_coherent_memory(&pdev->dev, res->start,
2109
DMA_MEMORY_EXCLUSIVE);
2111
dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
2116
pcdev->video_limit = resource_size(res);
2120
err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
2121
dev_name(&pdev->dev), pcdev);
2123
dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
2124
goto exit_release_mem;
2127
pm_suspend_ignore_children(&pdev->dev, true);
2128
pm_runtime_enable(&pdev->dev);
2129
pm_runtime_resume(&pdev->dev);
2131
pcdev->ici.priv = pcdev;
2132
pcdev->ici.v4l2_dev.dev = &pdev->dev;
2133
pcdev->ici.nr = pdev->id;
2134
pcdev->ici.drv_name = dev_name(&pdev->dev);
2135
pcdev->ici.ops = &sh_mobile_ceu_host_ops;
2137
pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
2138
if (IS_ERR(pcdev->alloc_ctx)) {
2139
err = PTR_ERR(pcdev->alloc_ctx);
2143
err = soc_camera_host_register(&pcdev->ici);
2147
/* CSI2 interfacing */
2148
csi2 = pcdev->pdata->csi2;
2150
struct platform_device *csi2_pdev =
2151
platform_device_alloc("sh-mobile-csi2", csi2->id);
2152
struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
2156
goto exit_host_unregister;
2159
pcdev->csi2_pdev = csi2_pdev;
2161
err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
2165
csi2_pdata = csi2_pdev->dev.platform_data;
2166
csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
2168
csi2_pdev->resource = csi2->resource;
2169
csi2_pdev->num_resources = csi2->num_resources;
2171
err = platform_device_add(csi2_pdev);
2175
wait.dev = &csi2_pdev->dev;
2177
err = bus_register_notifier(&platform_bus_type, &wait.notifier);
2179
goto exit_pdev_unregister;
2182
* From this point the driver module will not unload, until
2183
* we complete the completion.
2186
if (!csi2_pdev->dev.driver) {
2187
complete(&wait.completion);
2188
/* Either too late, or probing failed */
2189
bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2191
goto exit_pdev_unregister;
2195
* The module is still loaded, in the worst case it is hanging
2196
* in device release on our completion. So, _now_ dereferencing
2197
* the "owner" is safe!
2200
err = try_module_get(csi2_pdev->dev.driver->owner);
2202
/* Let notifier complete, if it has been locked */
2203
complete(&wait.completion);
2204
bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2207
goto exit_pdev_unregister;
2213
exit_pdev_unregister:
2214
platform_device_del(pcdev->csi2_pdev);
2216
pcdev->csi2_pdev->resource = NULL;
2217
platform_device_put(pcdev->csi2_pdev);
2218
exit_host_unregister:
2219
soc_camera_host_unregister(&pcdev->ici);
2221
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2223
pm_runtime_disable(&pdev->dev);
2224
free_irq(pcdev->irq, pcdev);
2226
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2227
dma_release_declared_memory(&pdev->dev);
2236
static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
2238
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
2239
struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
2240
struct sh_mobile_ceu_dev, ici);
2241
struct platform_device *csi2_pdev = pcdev->csi2_pdev;
2243
soc_camera_host_unregister(soc_host);
2244
pm_runtime_disable(&pdev->dev);
2245
free_irq(pcdev->irq, pcdev);
2246
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2247
dma_release_declared_memory(&pdev->dev);
2248
iounmap(pcdev->base);
2249
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2250
if (csi2_pdev && csi2_pdev->dev.driver) {
2251
struct module *csi2_drv = csi2_pdev->dev.driver->owner;
2252
platform_device_del(csi2_pdev);
2253
csi2_pdev->resource = NULL;
2254
platform_device_put(csi2_pdev);
2255
module_put(csi2_drv);
2262
static int sh_mobile_ceu_runtime_nop(struct device *dev)
2264
/* Runtime PM callback shared between ->runtime_suspend()
2265
* and ->runtime_resume(). Simply returns success.
2267
* This driver re-initializes all registers after
2268
* pm_runtime_get_sync() anyway so there is no need
2269
* to save and restore registers here.
2274
static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2275
.runtime_suspend = sh_mobile_ceu_runtime_nop,
2276
.runtime_resume = sh_mobile_ceu_runtime_nop,
2279
static struct platform_driver sh_mobile_ceu_driver = {
2281
.name = "sh_mobile_ceu",
2282
.pm = &sh_mobile_ceu_dev_pm_ops,
2284
.probe = sh_mobile_ceu_probe,
2285
.remove = __devexit_p(sh_mobile_ceu_remove),
2288
static int __init sh_mobile_ceu_init(void)
2290
/* Whatever return code */
2291
request_module("sh_mobile_csi2");
2292
return platform_driver_register(&sh_mobile_ceu_driver);
2295
static void __exit sh_mobile_ceu_exit(void)
2297
platform_driver_unregister(&sh_mobile_ceu_driver);
2300
module_init(sh_mobile_ceu_init);
2301
module_exit(sh_mobile_ceu_exit);
2303
MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2304
MODULE_AUTHOR("Magnus Damm");
2305
MODULE_LICENSE("GPL");
2306
MODULE_VERSION("0.0.6");
2307
MODULE_ALIAS("platform:sh_mobile_ceu");