![Guennadi Liakhovetski](/assets/img/avatar_default.png)
Recent format-negotiation patches caused S_CROP breakage in pxa_camera.c and sh_mobile_ceu_camera.c drivers, fix it. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
900 lines
24 KiB
C
900 lines
24 KiB
C
/*
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* V4L2 Driver for SuperH Mobile CEU interface
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*
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* Copyright (C) 2008 Magnus Damm
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*
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* Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
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*
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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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*
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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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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/io.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/fs.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/moduleparam.h>
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#include <linux/time.h>
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#include <linux/version.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/clk.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/videobuf-dma-contig.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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/* per video frame buffer */
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struct sh_mobile_ceu_buffer {
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struct videobuf_buffer vb; /* v4l buffer must be first */
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const struct soc_camera_data_format *fmt;
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};
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struct sh_mobile_ceu_dev {
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struct device *dev;
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struct soc_camera_host ici;
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struct soc_camera_device *icd;
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unsigned int irq;
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void __iomem *base;
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struct clk *clk;
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unsigned long video_limit;
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/* lock used to protect videobuf */
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spinlock_t lock;
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struct list_head capture;
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struct videobuf_buffer *active;
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int is_interlace;
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struct sh_mobile_ceu_info *pdata;
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const struct soc_camera_data_format *camera_fmt;
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};
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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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{
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iowrite32(data, priv->base + reg_offs);
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}
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static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
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{
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return ioread32(priv->base + reg_offs);
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}
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/*
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* Videobuf operations
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*/
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static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
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unsigned int *count,
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unsigned int *size)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
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*size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
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if (0 == *count)
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*count = 2;
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if (pcdev->video_limit) {
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while (*size * *count > pcdev->video_limit)
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(*count)--;
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}
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dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
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return 0;
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}
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static void free_buffer(struct videobuf_queue *vq,
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struct sh_mobile_ceu_buffer *buf)
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{
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struct soc_camera_device *icd = vq->priv_data;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
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&buf->vb, buf->vb.baddr, buf->vb.bsize);
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if (in_interrupt())
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BUG();
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videobuf_dma_contig_free(vq, &buf->vb);
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dev_dbg(&icd->dev, "%s freed\n", __func__);
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buf->vb.state = VIDEOBUF_NEEDS_INIT;
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}
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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_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
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static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
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{
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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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/* 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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*/
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ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
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ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
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ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
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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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if (!pcdev->active)
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return;
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phys_addr_top = videobuf_to_dma_contig(pcdev->active);
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ceu_write(pcdev, CDAYR, phys_addr_top);
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if (pcdev->is_interlace) {
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phys_addr_bottom = phys_addr_top + icd->width;
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ceu_write(pcdev, CDBYR, phys_addr_bottom);
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}
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switch (icd->current_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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phys_addr_top += icd->width * icd->height;
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ceu_write(pcdev, CDACR, phys_addr_top);
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if (pcdev->is_interlace) {
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phys_addr_bottom = phys_addr_top + icd->width;
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ceu_write(pcdev, CDBCR, phys_addr_bottom);
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}
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}
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pcdev->active->state = VIDEOBUF_ACTIVE;
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ceu_write(pcdev, CAPSR, 0x1); /* start capture */
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}
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static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
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struct videobuf_buffer *vb,
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enum v4l2_field field)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct sh_mobile_ceu_buffer *buf;
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int ret;
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buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
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vb, vb->baddr, vb->bsize);
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/* Added list head initialization on alloc */
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WARN_ON(!list_empty(&vb->queue));
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#ifdef DEBUG
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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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memset((void *)vb->baddr, 0xaa, vb->bsize);
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#endif
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BUG_ON(NULL == icd->current_fmt);
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if (buf->fmt != icd->current_fmt ||
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vb->width != icd->width ||
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vb->height != icd->height ||
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vb->field != field) {
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buf->fmt = icd->current_fmt;
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vb->width = icd->width;
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vb->height = icd->height;
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vb->field = field;
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
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if (0 != vb->baddr && vb->bsize < vb->size) {
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ret = -EINVAL;
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goto out;
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}
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if (vb->state == VIDEOBUF_NEEDS_INIT) {
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ret = videobuf_iolock(vq, vb, NULL);
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if (ret)
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goto fail;
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vb->state = VIDEOBUF_PREPARED;
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}
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return 0;
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fail:
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free_buffer(vq, buf);
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out:
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return ret;
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}
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static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
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struct videobuf_buffer *vb)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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unsigned long flags;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
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vb, vb->baddr, vb->bsize);
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vb->state = VIDEOBUF_QUEUED;
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spin_lock_irqsave(&pcdev->lock, flags);
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list_add_tail(&vb->queue, &pcdev->capture);
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if (!pcdev->active) {
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pcdev->active = vb;
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sh_mobile_ceu_capture(pcdev);
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}
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spin_unlock_irqrestore(&pcdev->lock, flags);
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}
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static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
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struct videobuf_buffer *vb)
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{
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free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
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}
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static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
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.buf_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_release = sh_mobile_ceu_videobuf_release,
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};
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static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
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{
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struct sh_mobile_ceu_dev *pcdev = data;
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struct videobuf_buffer *vb;
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unsigned long flags;
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spin_lock_irqsave(&pcdev->lock, flags);
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vb = pcdev->active;
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list_del_init(&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 videobuf_buffer, queue);
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else
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pcdev->active = NULL;
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sh_mobile_ceu_capture(pcdev);
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vb->state = VIDEOBUF_DONE;
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do_gettimeofday(&vb->ts);
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vb->field_count++;
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wake_up(&vb->done);
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spin_unlock_irqrestore(&pcdev->lock, flags);
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return IRQ_HANDLED;
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}
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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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{
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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int ret = -EBUSY;
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if (pcdev->icd)
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goto err;
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dev_info(&icd->dev,
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"SuperH Mobile CEU driver attached to camera %d\n",
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icd->devnum);
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ret = icd->ops->init(icd);
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if (ret)
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goto err;
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clk_enable(pcdev->clk);
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ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
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while (ceu_read(pcdev, CSTSR) & 1)
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msleep(1);
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pcdev->icd = icd;
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err:
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return ret;
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}
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/* Called with .video_lock held */
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static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
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{
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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unsigned long flags;
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BUG_ON(icd != pcdev->icd);
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/* disable capture, disable interrupts */
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ceu_write(pcdev, CEIER, 0);
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ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
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/* make sure active buffer is canceled */
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spin_lock_irqsave(&pcdev->lock, flags);
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if (pcdev->active) {
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list_del(&pcdev->active->queue);
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pcdev->active->state = VIDEOBUF_ERROR;
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wake_up_all(&pcdev->active->done);
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pcdev->active = NULL;
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}
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spin_unlock_irqrestore(&pcdev->lock, flags);
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clk_disable(pcdev->clk);
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icd->ops->release(icd);
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dev_info(&icd->dev,
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"SuperH Mobile CEU driver detached from camera %d\n",
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icd->devnum);
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pcdev->icd = NULL;
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}
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static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
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__u32 pixfmt)
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{
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct sh_mobile_ceu_dev *pcdev = ici->priv;
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int ret, buswidth, width, height, cfszr_width, cdwdr_width;
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unsigned long camera_flags, common_flags, value;
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int yuv_mode, yuv_lineskip;
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camera_flags = icd->ops->query_bus_param(icd);
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common_flags = soc_camera_bus_param_compatible(camera_flags,
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pcdev->pdata->flags);
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if (!common_flags)
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return -EINVAL;
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ret = icd->ops->set_bus_param(icd, common_flags);
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if (ret < 0)
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return ret;
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switch (common_flags & SOCAM_DATAWIDTH_MASK) {
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case SOCAM_DATAWIDTH_8:
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buswidth = 8;
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break;
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case SOCAM_DATAWIDTH_16:
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buswidth = 16;
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break;
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default:
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return -EINVAL;
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}
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ceu_write(pcdev, CRCNTR, 0);
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ceu_write(pcdev, CRCMPR, 0);
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value = 0x00000010; /* data fetch by default */
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yuv_mode = yuv_lineskip = 0;
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switch (icd->current_fmt->fourcc) {
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case V4L2_PIX_FMT_NV12:
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case V4L2_PIX_FMT_NV21:
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yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
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/* fall-through */
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case V4L2_PIX_FMT_NV16:
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case V4L2_PIX_FMT_NV61:
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yuv_mode = 1;
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switch (pcdev->camera_fmt->fourcc) {
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case V4L2_PIX_FMT_UYVY:
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value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
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break;
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case V4L2_PIX_FMT_VYUY:
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value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
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break;
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case V4L2_PIX_FMT_YUYV:
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value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
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break;
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case V4L2_PIX_FMT_YVYU:
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value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
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break;
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default:
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BUG();
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}
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}
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if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
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icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
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value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
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value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
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value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
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value |= buswidth == 16 ? 1 << 12 : 0;
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ceu_write(pcdev, CAMCR, value);
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ceu_write(pcdev, CAPCR, 0x00300000);
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ceu_write(pcdev, CAIFR, (pcdev->is_interlace) ? 0x101 : 0);
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mdelay(1);
|
|
|
|
if (yuv_mode) {
|
|
width = icd->width * 2;
|
|
width = buswidth == 16 ? width / 2 : width;
|
|
cfszr_width = cdwdr_width = icd->width;
|
|
} else {
|
|
width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
|
|
width = buswidth == 16 ? width / 2 : width;
|
|
cfszr_width = buswidth == 8 ? width / 2 : width;
|
|
cdwdr_width = buswidth == 16 ? width * 2 : width;
|
|
}
|
|
|
|
height = icd->height;
|
|
if (pcdev->is_interlace) {
|
|
height /= 2;
|
|
cdwdr_width *= 2;
|
|
}
|
|
|
|
ceu_write(pcdev, CAMOR, 0);
|
|
ceu_write(pcdev, CAPWR, (height << 16) | width);
|
|
ceu_write(pcdev, CFLCR, 0); /* no scaling */
|
|
ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
|
|
ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
|
|
|
|
/* 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 = 0x00000017;
|
|
if (yuv_lineskip)
|
|
value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
|
|
|
|
ceu_write(pcdev, CDOCR, value);
|
|
|
|
ceu_write(pcdev, CDWDR, cdwdr_width);
|
|
ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
|
|
|
|
/* 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)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
unsigned long camera_flags, common_flags;
|
|
|
|
camera_flags = icd->ops->query_bus_param(icd);
|
|
common_flags = soc_camera_bus_param_compatible(camera_flags,
|
|
pcdev->pdata->flags);
|
|
if (!common_flags)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
|
|
{
|
|
.name = "NV12",
|
|
.depth = 12,
|
|
.fourcc = V4L2_PIX_FMT_NV12,
|
|
.colorspace = V4L2_COLORSPACE_JPEG,
|
|
},
|
|
{
|
|
.name = "NV21",
|
|
.depth = 12,
|
|
.fourcc = V4L2_PIX_FMT_NV21,
|
|
.colorspace = V4L2_COLORSPACE_JPEG,
|
|
},
|
|
{
|
|
.name = "NV16",
|
|
.depth = 16,
|
|
.fourcc = V4L2_PIX_FMT_NV16,
|
|
.colorspace = V4L2_COLORSPACE_JPEG,
|
|
},
|
|
{
|
|
.name = "NV61",
|
|
.depth = 16,
|
|
.fourcc = V4L2_PIX_FMT_NV61,
|
|
.colorspace = V4L2_COLORSPACE_JPEG,
|
|
},
|
|
};
|
|
|
|
static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
|
|
struct soc_camera_format_xlate *xlate)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
int ret, k, n;
|
|
int formats = 0;
|
|
|
|
ret = sh_mobile_ceu_try_bus_param(icd);
|
|
if (ret < 0)
|
|
return 0;
|
|
|
|
switch (icd->formats[idx].fourcc) {
|
|
case V4L2_PIX_FMT_UYVY:
|
|
case V4L2_PIX_FMT_VYUY:
|
|
case V4L2_PIX_FMT_YUYV:
|
|
case V4L2_PIX_FMT_YVYU:
|
|
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->cam_fmt = icd->formats + idx;
|
|
xlate->buswidth = icd->formats[idx].depth;
|
|
xlate++;
|
|
dev_dbg(&ici->dev, "Providing format %s using %s\n",
|
|
sh_mobile_ceu_formats[k].name,
|
|
icd->formats[idx].name);
|
|
}
|
|
default:
|
|
/* Generic pass-through */
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = icd->formats + idx;
|
|
xlate->cam_fmt = icd->formats + idx;
|
|
xlate->buswidth = icd->formats[idx].depth;
|
|
xlate++;
|
|
dev_dbg(&ici->dev,
|
|
"Providing format %s in pass-through mode\n",
|
|
icd->formats[idx].name);
|
|
}
|
|
}
|
|
|
|
return formats;
|
|
}
|
|
|
|
static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
|
|
__u32 pixfmt, struct v4l2_rect *rect)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
const struct soc_camera_format_xlate *xlate;
|
|
int ret;
|
|
|
|
if (!pixfmt)
|
|
return icd->ops->set_fmt(icd, pixfmt, rect);
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect);
|
|
|
|
if (!ret) {
|
|
icd->buswidth = xlate->buswidth;
|
|
icd->current_fmt = xlate->host_fmt;
|
|
pcdev->camera_fmt = xlate->cam_fmt;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
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->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
const struct soc_camera_format_xlate *xlate;
|
|
__u32 pixfmt = f->fmt.pix.pixelformat;
|
|
int ret;
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* FIXME: calculate using depth and bus width */
|
|
|
|
if (f->fmt.pix.height < 4)
|
|
f->fmt.pix.height = 4;
|
|
if (f->fmt.pix.height > 1920)
|
|
f->fmt.pix.height = 1920;
|
|
if (f->fmt.pix.width < 2)
|
|
f->fmt.pix.width = 2;
|
|
if (f->fmt.pix.width > 2560)
|
|
f->fmt.pix.width = 2560;
|
|
f->fmt.pix.width &= ~0x01;
|
|
f->fmt.pix.height &= ~0x03;
|
|
|
|
f->fmt.pix.bytesperline = f->fmt.pix.width *
|
|
DIV_ROUND_UP(xlate->host_fmt->depth, 8);
|
|
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
|
|
|
|
/* limit to sensor capabilities */
|
|
ret = icd->ops->try_fmt(icd, f);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (f->fmt.pix.field) {
|
|
case V4L2_FIELD_INTERLACED:
|
|
pcdev->is_interlace = 1;
|
|
break;
|
|
case V4L2_FIELD_ANY:
|
|
f->fmt.pix.field = V4L2_FIELD_NONE;
|
|
/* fall-through */
|
|
case V4L2_FIELD_NONE:
|
|
pcdev->is_interlace = 0;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
|
|
struct v4l2_requestbuffers *p)
|
|
{
|
|
int i;
|
|
|
|
/* This is for locking debugging only. I removed spinlocks and now I
|
|
* check whether .prepare is ever called on a linked buffer, or whether
|
|
* a dma IRQ can occur for an in-work or unlinked buffer. Until now
|
|
* it hadn't triggered */
|
|
for (i = 0; i < p->count; i++) {
|
|
struct sh_mobile_ceu_buffer *buf;
|
|
|
|
buf = container_of(icf->vb_vidq.bufs[i],
|
|
struct sh_mobile_ceu_buffer, vb);
|
|
INIT_LIST_HEAD(&buf->vb.queue);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
|
|
{
|
|
struct soc_camera_file *icf = file->private_data;
|
|
struct sh_mobile_ceu_buffer *buf;
|
|
|
|
buf = list_entry(icf->vb_vidq.stream.next,
|
|
struct sh_mobile_ceu_buffer, vb.stream);
|
|
|
|
poll_wait(file, &buf->vb.done, pt);
|
|
|
|
if (buf->vb.state == VIDEOBUF_DONE ||
|
|
buf->vb.state == VIDEOBUF_ERROR)
|
|
return POLLIN|POLLRDNORM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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->version = KERNEL_VERSION(0, 0, 5);
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
|
return 0;
|
|
}
|
|
|
|
static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
|
|
struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
|
|
videobuf_queue_dma_contig_init(q,
|
|
&sh_mobile_ceu_videobuf_ops,
|
|
&ici->dev, &pcdev->lock,
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
|
V4L2_FIELD_ANY,
|
|
sizeof(struct sh_mobile_ceu_buffer),
|
|
icd);
|
|
}
|
|
|
|
static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
|
|
.owner = THIS_MODULE,
|
|
.add = sh_mobile_ceu_add_device,
|
|
.remove = sh_mobile_ceu_remove_device,
|
|
.get_formats = sh_mobile_ceu_get_formats,
|
|
.set_fmt = sh_mobile_ceu_set_fmt,
|
|
.try_fmt = sh_mobile_ceu_try_fmt,
|
|
.reqbufs = sh_mobile_ceu_reqbufs,
|
|
.poll = sh_mobile_ceu_poll,
|
|
.querycap = sh_mobile_ceu_querycap,
|
|
.set_bus_param = sh_mobile_ceu_set_bus_param,
|
|
.init_videobuf = sh_mobile_ceu_init_videobuf,
|
|
};
|
|
|
|
static int sh_mobile_ceu_probe(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_ceu_dev *pcdev;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
char clk_name[8];
|
|
unsigned int irq;
|
|
int err = 0;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (!res || !irq) {
|
|
dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
|
|
if (!pcdev) {
|
|
dev_err(&pdev->dev, "Could not allocate pcdev\n");
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, pcdev);
|
|
INIT_LIST_HEAD(&pcdev->capture);
|
|
spin_lock_init(&pcdev->lock);
|
|
|
|
pcdev->pdata = pdev->dev.platform_data;
|
|
if (!pcdev->pdata) {
|
|
err = -EINVAL;
|
|
dev_err(&pdev->dev, "CEU platform data not set.\n");
|
|
goto exit_kfree;
|
|
}
|
|
|
|
base = ioremap_nocache(res->start, res->end - res->start + 1);
|
|
if (!base) {
|
|
err = -ENXIO;
|
|
dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
|
|
goto exit_kfree;
|
|
}
|
|
|
|
pcdev->irq = irq;
|
|
pcdev->base = base;
|
|
pcdev->video_limit = 0; /* only enabled if second resource exists */
|
|
pcdev->dev = &pdev->dev;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (res) {
|
|
err = dma_declare_coherent_memory(&pdev->dev, res->start,
|
|
res->start,
|
|
(res->end - res->start) + 1,
|
|
DMA_MEMORY_MAP |
|
|
DMA_MEMORY_EXCLUSIVE);
|
|
if (!err) {
|
|
dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
|
|
err = -ENXIO;
|
|
goto exit_iounmap;
|
|
}
|
|
|
|
pcdev->video_limit = (res->end - res->start) + 1;
|
|
}
|
|
|
|
/* request irq */
|
|
err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
|
|
dev_name(&pdev->dev), pcdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
|
|
goto exit_release_mem;
|
|
}
|
|
|
|
snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
|
|
pcdev->clk = clk_get(&pdev->dev, clk_name);
|
|
if (IS_ERR(pcdev->clk)) {
|
|
dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
|
|
err = PTR_ERR(pcdev->clk);
|
|
goto exit_free_irq;
|
|
}
|
|
|
|
pcdev->ici.priv = pcdev;
|
|
pcdev->ici.dev.parent = &pdev->dev;
|
|
pcdev->ici.nr = pdev->id;
|
|
pcdev->ici.drv_name = dev_name(&pdev->dev);
|
|
pcdev->ici.ops = &sh_mobile_ceu_host_ops;
|
|
|
|
err = soc_camera_host_register(&pcdev->ici);
|
|
if (err)
|
|
goto exit_free_clk;
|
|
|
|
return 0;
|
|
|
|
exit_free_clk:
|
|
clk_put(pcdev->clk);
|
|
exit_free_irq:
|
|
free_irq(pcdev->irq, pcdev);
|
|
exit_release_mem:
|
|
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
|
|
dma_release_declared_memory(&pdev->dev);
|
|
exit_iounmap:
|
|
iounmap(base);
|
|
exit_kfree:
|
|
kfree(pcdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int sh_mobile_ceu_remove(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
|
|
|
|
soc_camera_host_unregister(&pcdev->ici);
|
|
clk_put(pcdev->clk);
|
|
free_irq(pcdev->irq, pcdev);
|
|
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
|
|
dma_release_declared_memory(&pdev->dev);
|
|
iounmap(pcdev->base);
|
|
kfree(pcdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sh_mobile_ceu_driver = {
|
|
.driver = {
|
|
.name = "sh_mobile_ceu",
|
|
},
|
|
.probe = sh_mobile_ceu_probe,
|
|
.remove = sh_mobile_ceu_remove,
|
|
};
|
|
|
|
static int __init sh_mobile_ceu_init(void)
|
|
{
|
|
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");
|