![Guennadi Liakhovetski](/assets/img/avatar_default.png)
Using CEU with CSI2 on SH-Mobile requires some special configuration of the former. We also have to switch from calling only one subdev .s_mbus_fmt and .try_mbus_fmt to calling all subdevices. Take care to increment CSI2 driver use count to prevent it from unloading, while in use. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2114 lines
56 KiB
C
2114 lines
56 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/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/videobuf-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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#undef DEBUG_GEOMETRY
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#ifdef DEBUG_GEOMETRY
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#define dev_geo dev_info
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#else
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#define dev_geo dev_dbg
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#endif
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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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enum v4l2_mbus_pixelcode code;
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};
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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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unsigned int irq;
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void __iomem *base;
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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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struct sh_mobile_ceu_info *pdata;
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u32 cflcr;
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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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};
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struct sh_mobile_ceu_cam {
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/* CEU offsets within scaled by the CEU camera output */
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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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unsigned int width;
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unsigned int height;
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/*
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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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* input window
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*/
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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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};
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static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
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{
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unsigned long flags;
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flags = SOCAM_MASTER |
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SOCAM_PCLK_SAMPLE_RISING |
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SOCAM_HSYNC_ACTIVE_HIGH |
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SOCAM_HSYNC_ACTIVE_LOW |
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SOCAM_VSYNC_ACTIVE_HIGH |
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SOCAM_VSYNC_ACTIVE_LOW |
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SOCAM_DATA_ACTIVE_HIGH;
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if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
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flags |= SOCAM_DATAWIDTH_8;
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if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
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flags |= SOCAM_DATAWIDTH_16;
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if (flags & SOCAM_DATAWIDTH_MASK)
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return flags;
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return 0;
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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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static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
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{
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int i, success = 0;
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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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success++;
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break;
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}
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udelay(1);
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}
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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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success++;
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break;
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}
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udelay(1);
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}
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if (2 != success) {
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dev_warn(&icd->dev, "soft reset time out\n");
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return -EIO;
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}
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return 0;
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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_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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return bytes_per_line;
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*size = bytes_per_line * icd->user_height;
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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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if (PAGE_ALIGN(*size) * *count > pcdev->video_limit)
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*count = pcdev->video_limit / PAGE_ALIGN(*size);
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}
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dev_dbg(icd->dev.parent, "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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struct device *dev = icd->dev.parent;
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dev_dbg(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_waiton(&buf->vb, 0, 0);
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videobuf_dma_contig_free(vq, &buf->vb);
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dev_dbg(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_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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/*
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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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*/
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static int 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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unsigned long top1, top2;
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unsigned long bottom1, bottom2;
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u32 status;
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int ret = 0;
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/*
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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_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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/*
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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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* is needed here.
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*/
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if (status & CEU_CEIER_VBP) {
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sh_mobile_ceu_soft_reset(pcdev);
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ret = -EIO;
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}
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if (!pcdev->active)
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return ret;
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if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
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top1 = CDBYR;
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top2 = CDBCR;
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bottom1 = CDAYR;
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bottom2 = CDACR;
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} else {
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top1 = CDAYR;
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top2 = CDACR;
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bottom1 = CDBYR;
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bottom2 = CDBCR;
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}
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phys_addr_top = videobuf_to_dma_contig(pcdev->active);
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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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ceu_write(pcdev, bottom1, phys_addr_bottom);
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}
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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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phys_addr_top += icd->user_width *
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icd->user_height;
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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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}
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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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return ret;
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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 bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
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icd->current_fmt->host_fmt);
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int ret;
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if (bytes_per_line < 0)
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return bytes_per_line;
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buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
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dev_dbg(icd->dev.parent, "%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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/*
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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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*/
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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->code != icd->current_fmt->code ||
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vb->width != icd->user_width ||
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vb->height != icd->user_height ||
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vb->field != field) {
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buf->code = icd->current_fmt->code;
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vb->width = icd->user_width;
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vb->height = icd->user_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->height * bytes_per_line;
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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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/* Called under spinlock_irqsave(&pcdev->lock, ...) */
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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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dev_dbg(icd->dev.parent, "%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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list_add_tail(&vb->queue, &pcdev->capture);
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if (!pcdev->active) {
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/*
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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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*/
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pcdev->active = vb;
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sh_mobile_ceu_capture(pcdev);
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}
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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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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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spin_lock_irqsave(&pcdev->lock, flags);
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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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}
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if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
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!list_empty(&vb->queue)) {
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vb->state = VIDEOBUF_ERROR;
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list_del_init(&vb->queue);
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}
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spin_unlock_irqrestore(&pcdev->lock, flags);
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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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if (!vb)
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/* Stale interrupt from a released buffer */
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goto out;
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|
|
|
list_del_init(&vb->queue);
|
|
|
|
if (!list_empty(&pcdev->capture))
|
|
pcdev->active = list_entry(pcdev->capture.next,
|
|
struct videobuf_buffer, queue);
|
|
else
|
|
pcdev->active = NULL;
|
|
|
|
vb->state = (sh_mobile_ceu_capture(pcdev) < 0) ?
|
|
VIDEOBUF_ERROR : VIDEOBUF_DONE;
|
|
do_gettimeofday(&vb->ts);
|
|
vb->field_count++;
|
|
wake_up(&vb->done);
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&pcdev->lock, flags);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* Called with .video_lock held */
|
|
static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
int ret;
|
|
|
|
if (pcdev->icd)
|
|
return -EBUSY;
|
|
|
|
dev_info(icd->dev.parent,
|
|
"SuperH Mobile CEU driver attached to camera %d\n",
|
|
icd->devnum);
|
|
|
|
pm_runtime_get_sync(ici->v4l2_dev.dev);
|
|
|
|
ret = sh_mobile_ceu_soft_reset(pcdev);
|
|
if (!ret)
|
|
pcdev->icd = icd;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Called with .video_lock held */
|
|
static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
unsigned long flags;
|
|
|
|
BUG_ON(icd != pcdev->icd);
|
|
|
|
/* disable capture, disable interrupts */
|
|
ceu_write(pcdev, CEIER, 0);
|
|
sh_mobile_ceu_soft_reset(pcdev);
|
|
|
|
/* make sure active buffer is canceled */
|
|
spin_lock_irqsave(&pcdev->lock, flags);
|
|
if (pcdev->active) {
|
|
list_del(&pcdev->active->queue);
|
|
pcdev->active->state = VIDEOBUF_ERROR;
|
|
wake_up_all(&pcdev->active->done);
|
|
pcdev->active = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&pcdev->lock, flags);
|
|
|
|
pm_runtime_put_sync(ici->v4l2_dev.dev);
|
|
|
|
dev_info(icd->dev.parent,
|
|
"SuperH Mobile CEU driver detached from camera %d\n",
|
|
icd->devnum);
|
|
|
|
pcdev->icd = NULL;
|
|
}
|
|
|
|
/*
|
|
* See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
|
|
* in SH7722 Hardware Manual
|
|
*/
|
|
static unsigned int size_dst(unsigned int src, unsigned int scale)
|
|
{
|
|
unsigned int mant_pre = scale >> 12;
|
|
if (!src || !scale)
|
|
return src;
|
|
return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
|
|
mant_pre * 4096 / scale + 1;
|
|
}
|
|
|
|
static u16 calc_scale(unsigned int src, unsigned int *dst)
|
|
{
|
|
u16 scale;
|
|
|
|
if (src == *dst)
|
|
return 0;
|
|
|
|
scale = (src * 4096 / *dst) & ~7;
|
|
|
|
while (scale > 4096 && size_dst(src, scale) < *dst)
|
|
scale -= 8;
|
|
|
|
*dst = size_dst(src, scale);
|
|
|
|
return scale;
|
|
}
|
|
|
|
/* rect is guaranteed to not exceed the scaled camera rectangle */
|
|
static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
unsigned int height, width, cdwdr_width, in_width, in_height;
|
|
unsigned int left_offset, top_offset;
|
|
u32 camor;
|
|
|
|
dev_geo(icd->dev.parent, "Crop %ux%u@%u:%u\n",
|
|
icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
|
|
|
|
left_offset = cam->ceu_left;
|
|
top_offset = cam->ceu_top;
|
|
|
|
/* CEU cropping (CFSZR) is applied _after_ the scaling filter (CFLCR) */
|
|
if (pcdev->image_mode) {
|
|
in_width = cam->width;
|
|
if (!pcdev->is_16bit) {
|
|
in_width *= 2;
|
|
left_offset *= 2;
|
|
}
|
|
width = icd->user_width;
|
|
cdwdr_width = icd->user_width;
|
|
} else {
|
|
int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
|
|
icd->current_fmt->host_fmt);
|
|
unsigned int w_factor;
|
|
|
|
width = icd->user_width;
|
|
|
|
switch (icd->current_fmt->host_fmt->packing) {
|
|
case SOC_MBUS_PACKING_2X8_PADHI:
|
|
w_factor = 2;
|
|
break;
|
|
default:
|
|
w_factor = 1;
|
|
}
|
|
|
|
in_width = cam->width * w_factor;
|
|
left_offset = left_offset * w_factor;
|
|
|
|
if (bytes_per_line < 0)
|
|
cdwdr_width = icd->user_width;
|
|
else
|
|
cdwdr_width = bytes_per_line;
|
|
}
|
|
|
|
height = icd->user_height;
|
|
in_height = cam->height;
|
|
if (V4L2_FIELD_NONE != pcdev->field) {
|
|
height /= 2;
|
|
in_height /= 2;
|
|
top_offset /= 2;
|
|
cdwdr_width *= 2;
|
|
}
|
|
|
|
/* CSI2 special configuration */
|
|
if (pcdev->pdata->csi2_dev) {
|
|
in_width = ((in_width - 2) * 2);
|
|
left_offset *= 2;
|
|
}
|
|
|
|
/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
|
|
camor = left_offset | (top_offset << 16);
|
|
|
|
dev_geo(icd->dev.parent,
|
|
"CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
|
|
(in_height << 16) | in_width, (height << 16) | width,
|
|
cdwdr_width);
|
|
|
|
ceu_write(pcdev, CAMOR, camor);
|
|
ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
|
|
ceu_write(pcdev, CFSZR, (height << 16) | width);
|
|
ceu_write(pcdev, CDWDR, cdwdr_width);
|
|
}
|
|
|
|
static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
|
|
{
|
|
u32 capsr = ceu_read(pcdev, CAPSR);
|
|
ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
|
|
return capsr;
|
|
}
|
|
|
|
static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
|
|
{
|
|
unsigned long timeout = jiffies + 10 * HZ;
|
|
|
|
/*
|
|
* Wait until the end of the current frame. It can take a long time,
|
|
* but if it has been aborted by a CAPSR reset, it shoule exit sooner.
|
|
*/
|
|
while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
|
|
msleep(1);
|
|
|
|
if (time_after(jiffies, timeout)) {
|
|
dev_err(pcdev->ici.v4l2_dev.dev,
|
|
"Timeout waiting for frame end! Interface problem?\n");
|
|
return;
|
|
}
|
|
|
|
/* Wait until reset clears, this shall not hang... */
|
|
while (ceu_read(pcdev, CAPSR) & (1 << 16))
|
|
udelay(10);
|
|
|
|
/* Anything to restore? */
|
|
if (capsr & ~(1 << 16))
|
|
ceu_write(pcdev, CAPSR, capsr);
|
|
}
|
|
|
|
static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
|
|
__u32 pixfmt)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
int ret;
|
|
unsigned long camera_flags, common_flags, value;
|
|
int yuv_lineskip;
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
u32 capsr = capture_save_reset(pcdev);
|
|
|
|
camera_flags = icd->ops->query_bus_param(icd);
|
|
common_flags = soc_camera_bus_param_compatible(camera_flags,
|
|
make_bus_param(pcdev));
|
|
if (!common_flags)
|
|
return -EINVAL;
|
|
|
|
/* Make choises, based on platform preferences */
|
|
if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
|
|
(common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
|
|
if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
|
|
common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
|
|
else
|
|
common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
|
|
}
|
|
|
|
if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
|
|
(common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
|
|
if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
|
|
common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
|
|
else
|
|
common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
|
|
}
|
|
|
|
ret = icd->ops->set_bus_param(icd, common_flags);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (common_flags & SOCAM_DATAWIDTH_MASK) {
|
|
case SOCAM_DATAWIDTH_8:
|
|
pcdev->is_16bit = 0;
|
|
break;
|
|
case SOCAM_DATAWIDTH_16:
|
|
pcdev->is_16bit = 1;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
ceu_write(pcdev, CRCNTR, 0);
|
|
ceu_write(pcdev, CRCMPR, 0);
|
|
|
|
value = 0x00000010; /* data fetch by default */
|
|
yuv_lineskip = 0;
|
|
|
|
switch (icd->current_fmt->host_fmt->fourcc) {
|
|
case V4L2_PIX_FMT_NV12:
|
|
case V4L2_PIX_FMT_NV21:
|
|
yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
|
|
/* fall-through */
|
|
case V4L2_PIX_FMT_NV16:
|
|
case V4L2_PIX_FMT_NV61:
|
|
switch (cam->code) {
|
|
case V4L2_MBUS_FMT_UYVY8_2X8:
|
|
value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
|
|
break;
|
|
case V4L2_MBUS_FMT_VYUY8_2X8:
|
|
value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
|
|
break;
|
|
case V4L2_MBUS_FMT_YUYV8_2X8:
|
|
value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
|
|
break;
|
|
case V4L2_MBUS_FMT_YVYU8_2X8:
|
|
value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
|
|
icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
|
|
value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
|
|
|
|
value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
|
|
value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
|
|
value |= pcdev->is_16bit ? 1 << 12 : 0;
|
|
|
|
/* CSI2 mode */
|
|
if (pcdev->pdata->csi2_dev)
|
|
value |= 3 << 12;
|
|
|
|
ceu_write(pcdev, CAMCR, value);
|
|
|
|
ceu_write(pcdev, CAPCR, 0x00300000);
|
|
|
|
switch (pcdev->field) {
|
|
case V4L2_FIELD_INTERLACED_TB:
|
|
value = 0x101;
|
|
break;
|
|
case V4L2_FIELD_INTERLACED_BT:
|
|
value = 0x102;
|
|
break;
|
|
default:
|
|
value = 0;
|
|
break;
|
|
}
|
|
ceu_write(pcdev, CAIFR, value);
|
|
|
|
sh_mobile_ceu_set_rect(icd);
|
|
mdelay(1);
|
|
|
|
dev_geo(icd->dev.parent, "CFLCR 0x%x\n", pcdev->cflcr);
|
|
ceu_write(pcdev, CFLCR, pcdev->cflcr);
|
|
|
|
/*
|
|
* A few words about byte order (observed in Big Endian mode)
|
|
*
|
|
* In data fetch mode bytes are received in chunks of 8 bytes.
|
|
* D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
|
|
*
|
|
* The data is however by default written to memory in reverse order:
|
|
* D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
|
|
*
|
|
* The lowest three bits of CDOCR allows us to do swapping,
|
|
* using 7 we swap the data bytes to match the incoming order:
|
|
* D0, D1, D2, D3, D4, D5, D6, D7
|
|
*/
|
|
value = 0x00000017;
|
|
if (yuv_lineskip)
|
|
value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
|
|
|
|
ceu_write(pcdev, CDOCR, value);
|
|
ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
|
|
|
|
dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u\n",
|
|
pixfmt & 0xff, (pixfmt >> 8) & 0xff,
|
|
(pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
|
|
icd->user_width, icd->user_height);
|
|
|
|
capture_restore(pcdev, capsr);
|
|
|
|
/* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
|
|
unsigned char buswidth)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->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,
|
|
make_bus_param(pcdev));
|
|
if (!common_flags || buswidth > 16 ||
|
|
(buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_16)))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
|
|
{
|
|
.fourcc = V4L2_PIX_FMT_NV12,
|
|
.name = "NV12",
|
|
.bits_per_sample = 12,
|
|
.packing = SOC_MBUS_PACKING_NONE,
|
|
.order = SOC_MBUS_ORDER_LE,
|
|
}, {
|
|
.fourcc = V4L2_PIX_FMT_NV21,
|
|
.name = "NV21",
|
|
.bits_per_sample = 12,
|
|
.packing = SOC_MBUS_PACKING_NONE,
|
|
.order = SOC_MBUS_ORDER_LE,
|
|
}, {
|
|
.fourcc = V4L2_PIX_FMT_NV16,
|
|
.name = "NV16",
|
|
.bits_per_sample = 16,
|
|
.packing = SOC_MBUS_PACKING_NONE,
|
|
.order = SOC_MBUS_ORDER_LE,
|
|
}, {
|
|
.fourcc = V4L2_PIX_FMT_NV61,
|
|
.name = "NV61",
|
|
.bits_per_sample = 16,
|
|
.packing = SOC_MBUS_PACKING_NONE,
|
|
.order = SOC_MBUS_ORDER_LE,
|
|
},
|
|
};
|
|
|
|
/* This will be corrected as we get more formats */
|
|
static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
|
|
{
|
|
return fmt->packing == SOC_MBUS_PACKING_NONE ||
|
|
(fmt->bits_per_sample == 8 &&
|
|
fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
|
|
(fmt->bits_per_sample > 8 &&
|
|
fmt->packing == SOC_MBUS_PACKING_EXTEND16);
|
|
}
|
|
|
|
static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
|
|
|
|
static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
|
|
struct soc_camera_format_xlate *xlate)
|
|
{
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct device *dev = icd->dev.parent;
|
|
struct soc_camera_host *ici = to_soc_camera_host(dev);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
int ret, k, n;
|
|
int formats = 0;
|
|
struct sh_mobile_ceu_cam *cam;
|
|
enum v4l2_mbus_pixelcode code;
|
|
const struct soc_mbus_pixelfmt *fmt;
|
|
|
|
ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
|
|
if (ret < 0)
|
|
/* No more formats */
|
|
return 0;
|
|
|
|
fmt = soc_mbus_get_fmtdesc(code);
|
|
if (!fmt) {
|
|
dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!pcdev->pdata->csi2_dev) {
|
|
ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
|
|
if (ret < 0)
|
|
return 0;
|
|
}
|
|
|
|
if (!icd->host_priv) {
|
|
struct v4l2_mbus_framefmt mf;
|
|
struct v4l2_rect rect;
|
|
int shift = 0;
|
|
|
|
/* FIXME: subwindow is lost between close / open */
|
|
|
|
/* Cache current client geometry */
|
|
ret = client_g_rect(sd, &rect);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* First time */
|
|
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
|
|
/* Try 2560x1920, 1280x960, 640x480, 320x240 */
|
|
mf.width = 2560 >> shift;
|
|
mf.height = 1920 >> shift;
|
|
ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
|
|
s_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
shift++;
|
|
}
|
|
|
|
if (shift == 4) {
|
|
dev_err(dev, "Failed to configure the client below %ux%x\n",
|
|
mf.width, mf.height);
|
|
return -EIO;
|
|
}
|
|
|
|
dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
|
|
|
|
cam = kzalloc(sizeof(*cam), GFP_KERNEL);
|
|
if (!cam)
|
|
return -ENOMEM;
|
|
|
|
/* We are called with current camera crop, initialise subrect with it */
|
|
cam->rect = rect;
|
|
cam->subrect = rect;
|
|
|
|
cam->width = mf.width;
|
|
cam->height = mf.height;
|
|
|
|
cam->width = mf.width;
|
|
cam->height = mf.height;
|
|
|
|
icd->host_priv = cam;
|
|
} else {
|
|
cam = icd->host_priv;
|
|
}
|
|
|
|
/* Beginning of a pass */
|
|
if (!idx)
|
|
cam->extra_fmt = NULL;
|
|
|
|
switch (code) {
|
|
case V4L2_MBUS_FMT_UYVY8_2X8:
|
|
case V4L2_MBUS_FMT_VYUY8_2X8:
|
|
case V4L2_MBUS_FMT_YUYV8_2X8:
|
|
case V4L2_MBUS_FMT_YVYU8_2X8:
|
|
if (cam->extra_fmt)
|
|
break;
|
|
|
|
/*
|
|
* Our case is simple so far: for any of the above four camera
|
|
* formats we add all our four synthesized NV* formats, so,
|
|
* just marking the device with a single flag suffices. If
|
|
* the format generation rules are more complex, you would have
|
|
* to actually hang your already added / counted formats onto
|
|
* the host_priv pointer and check whether the format you're
|
|
* going to add now is already there.
|
|
*/
|
|
cam->extra_fmt = sh_mobile_ceu_formats;
|
|
|
|
n = ARRAY_SIZE(sh_mobile_ceu_formats);
|
|
formats += n;
|
|
for (k = 0; xlate && k < n; k++) {
|
|
xlate->host_fmt = &sh_mobile_ceu_formats[k];
|
|
xlate->code = code;
|
|
xlate++;
|
|
dev_dbg(dev, "Providing format %s using code %d\n",
|
|
sh_mobile_ceu_formats[k].name, code);
|
|
}
|
|
break;
|
|
default:
|
|
if (!sh_mobile_ceu_packing_supported(fmt))
|
|
return 0;
|
|
}
|
|
|
|
/* Generic pass-through */
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = fmt;
|
|
xlate->code = code;
|
|
xlate++;
|
|
dev_dbg(dev, "Providing format %s in pass-through mode\n",
|
|
fmt->name);
|
|
}
|
|
|
|
return formats;
|
|
}
|
|
|
|
static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
|
|
{
|
|
kfree(icd->host_priv);
|
|
icd->host_priv = NULL;
|
|
}
|
|
|
|
/* Check if any dimension of r1 is smaller than respective one of r2 */
|
|
static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
|
|
{
|
|
return r1->width < r2->width || r1->height < r2->height;
|
|
}
|
|
|
|
/* Check if r1 fails to cover r2 */
|
|
static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
|
|
{
|
|
return r1->left > r2->left || r1->top > r2->top ||
|
|
r1->left + r1->width < r2->left + r2->width ||
|
|
r1->top + r1->height < r2->top + r2->height;
|
|
}
|
|
|
|
static unsigned int scale_down(unsigned int size, unsigned int scale)
|
|
{
|
|
return (size * 4096 + scale / 2) / scale;
|
|
}
|
|
|
|
static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
|
|
{
|
|
return (input * 4096 + output / 2) / output;
|
|
}
|
|
|
|
/* Get and store current client crop */
|
|
static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
|
|
{
|
|
struct v4l2_crop crop;
|
|
struct v4l2_cropcap cap;
|
|
int ret;
|
|
|
|
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
|
|
ret = v4l2_subdev_call(sd, video, g_crop, &crop);
|
|
if (!ret) {
|
|
*rect = crop.c;
|
|
return ret;
|
|
}
|
|
|
|
/* Camera driver doesn't support .g_crop(), assume default rectangle */
|
|
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
|
|
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
|
|
if (!ret)
|
|
*rect = cap.defrect;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Client crop has changed, update our sub-rectangle to remain within the area */
|
|
static void update_subrect(struct sh_mobile_ceu_cam *cam)
|
|
{
|
|
struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
|
|
|
|
if (rect->width < subrect->width)
|
|
subrect->width = rect->width;
|
|
|
|
if (rect->height < subrect->height)
|
|
subrect->height = rect->height;
|
|
|
|
if (rect->left > subrect->left)
|
|
subrect->left = rect->left;
|
|
else if (rect->left + rect->width >
|
|
subrect->left + subrect->width)
|
|
subrect->left = rect->left + rect->width -
|
|
subrect->width;
|
|
|
|
if (rect->top > subrect->top)
|
|
subrect->top = rect->top;
|
|
else if (rect->top + rect->height >
|
|
subrect->top + subrect->height)
|
|
subrect->top = rect->top + rect->height -
|
|
subrect->height;
|
|
}
|
|
|
|
/*
|
|
* The common for both scaling and cropping iterative approach is:
|
|
* 1. try if the client can produce exactly what requested by the user
|
|
* 2. if (1) failed, try to double the client image until we get one big enough
|
|
* 3. if (2) failed, try to request the maximum image
|
|
*/
|
|
static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
|
|
struct v4l2_crop *cam_crop)
|
|
{
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
|
|
struct device *dev = sd->v4l2_dev->dev;
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct v4l2_cropcap cap;
|
|
int ret;
|
|
unsigned int width, height;
|
|
|
|
v4l2_subdev_call(sd, video, s_crop, crop);
|
|
ret = client_g_rect(sd, cam_rect);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Now cam_crop contains the current camera input rectangle, and it must
|
|
* be within camera cropcap bounds
|
|
*/
|
|
if (!memcmp(rect, cam_rect, sizeof(*rect))) {
|
|
/* Even if camera S_CROP failed, but camera rectangle matches */
|
|
dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
|
|
rect->width, rect->height, rect->left, rect->top);
|
|
cam->rect = *cam_rect;
|
|
return 0;
|
|
}
|
|
|
|
/* Try to fix cropping, that camera hasn't managed to set */
|
|
dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
|
|
cam_rect->width, cam_rect->height,
|
|
cam_rect->left, cam_rect->top,
|
|
rect->width, rect->height, rect->left, rect->top);
|
|
|
|
/* We need sensor maximum rectangle */
|
|
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Put user requested rectangle within sensor bounds */
|
|
soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
|
|
cap.bounds.width);
|
|
soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
|
|
cap.bounds.height);
|
|
|
|
/*
|
|
* Popular special case - some cameras can only handle fixed sizes like
|
|
* QVGA, VGA,... Take care to avoid infinite loop.
|
|
*/
|
|
width = max(cam_rect->width, 2);
|
|
height = max(cam_rect->height, 2);
|
|
|
|
/*
|
|
* Loop as long as sensor is not covering the requested rectangle and
|
|
* is still within its bounds
|
|
*/
|
|
while (!ret && (is_smaller(cam_rect, rect) ||
|
|
is_inside(cam_rect, rect)) &&
|
|
(cap.bounds.width > width || cap.bounds.height > height)) {
|
|
|
|
width *= 2;
|
|
height *= 2;
|
|
|
|
cam_rect->width = width;
|
|
cam_rect->height = height;
|
|
|
|
/*
|
|
* We do not know what capabilities the camera has to set up
|
|
* left and top borders. We could try to be smarter in iterating
|
|
* them, e.g., if camera current left is to the right of the
|
|
* target left, set it to the middle point between the current
|
|
* left and minimum left. But that would add too much
|
|
* complexity: we would have to iterate each border separately.
|
|
* Instead we just drop to the left and top bounds.
|
|
*/
|
|
if (cam_rect->left > rect->left)
|
|
cam_rect->left = cap.bounds.left;
|
|
|
|
if (cam_rect->left + cam_rect->width < rect->left + rect->width)
|
|
cam_rect->width = rect->left + rect->width -
|
|
cam_rect->left;
|
|
|
|
if (cam_rect->top > rect->top)
|
|
cam_rect->top = cap.bounds.top;
|
|
|
|
if (cam_rect->top + cam_rect->height < rect->top + rect->height)
|
|
cam_rect->height = rect->top + rect->height -
|
|
cam_rect->top;
|
|
|
|
v4l2_subdev_call(sd, video, s_crop, cam_crop);
|
|
ret = client_g_rect(sd, cam_rect);
|
|
dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
|
|
cam_rect->width, cam_rect->height,
|
|
cam_rect->left, cam_rect->top);
|
|
}
|
|
|
|
/* S_CROP must not modify the rectangle */
|
|
if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
|
|
/*
|
|
* The camera failed to configure a suitable cropping,
|
|
* we cannot use the current rectangle, set to max
|
|
*/
|
|
*cam_rect = cap.bounds;
|
|
v4l2_subdev_call(sd, video, s_crop, cam_crop);
|
|
ret = client_g_rect(sd, cam_rect);
|
|
dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
|
|
cam_rect->width, cam_rect->height,
|
|
cam_rect->left, cam_rect->top);
|
|
}
|
|
|
|
if (!ret) {
|
|
cam->rect = *cam_rect;
|
|
update_subrect(cam);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Iterative s_mbus_fmt, also updates cached client crop on success */
|
|
static int client_s_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
|
|
{
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct device *dev = icd->dev.parent;
|
|
unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
|
|
unsigned int max_width, max_height;
|
|
struct v4l2_cropcap cap;
|
|
int ret;
|
|
|
|
ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
|
|
s_mbus_fmt, mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
|
|
|
|
if ((width == mf->width && height == mf->height) || !ceu_can_scale)
|
|
goto update_cache;
|
|
|
|
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
|
|
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
max_width = min(cap.bounds.width, 2560);
|
|
max_height = min(cap.bounds.height, 1920);
|
|
|
|
/* Camera set a format, but geometry is not precise, try to improve */
|
|
tmp_w = mf->width;
|
|
tmp_h = mf->height;
|
|
|
|
/* width <= max_width && height <= max_height - guaranteed by try_fmt */
|
|
while ((width > tmp_w || height > tmp_h) &&
|
|
tmp_w < max_width && tmp_h < max_height) {
|
|
tmp_w = min(2 * tmp_w, max_width);
|
|
tmp_h = min(2 * tmp_h, max_height);
|
|
mf->width = tmp_w;
|
|
mf->height = tmp_h;
|
|
ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
|
|
s_mbus_fmt, mf);
|
|
dev_geo(dev, "Camera scaled to %ux%u\n",
|
|
mf->width, mf->height);
|
|
if (ret < 0) {
|
|
/* This shouldn't happen */
|
|
dev_err(dev, "Client failed to set format: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
update_cache:
|
|
/* Update cache */
|
|
ret = client_g_rect(sd, &cam->rect);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
update_subrect(cam);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* @width - on output: user width, mapped back to input
|
|
* @height - on output: user height, mapped back to input
|
|
* @mf - in- / output camera output window
|
|
*/
|
|
static int client_scale(struct soc_camera_device *icd,
|
|
struct v4l2_mbus_framefmt *mf,
|
|
unsigned int *width, unsigned int *height,
|
|
bool ceu_can_scale)
|
|
{
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct device *dev = icd->dev.parent;
|
|
struct v4l2_mbus_framefmt mf_tmp = *mf;
|
|
unsigned int scale_h, scale_v;
|
|
int ret;
|
|
|
|
/*
|
|
* 5. Apply iterative camera S_FMT for camera user window (also updates
|
|
* client crop cache and the imaginary sub-rectangle).
|
|
*/
|
|
ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_geo(dev, "5: camera scaled to %ux%u\n",
|
|
mf_tmp.width, mf_tmp.height);
|
|
|
|
/* 6. Retrieve camera output window (g_fmt) */
|
|
|
|
/* unneeded - it is already in "mf_tmp" */
|
|
|
|
/* 7. Calculate new client scales. */
|
|
scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
|
|
scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
|
|
|
|
mf->width = mf_tmp.width;
|
|
mf->height = mf_tmp.height;
|
|
mf->colorspace = mf_tmp.colorspace;
|
|
|
|
/*
|
|
* 8. Calculate new CEU crop - apply camera scales to previously
|
|
* updated "effective" crop.
|
|
*/
|
|
*width = scale_down(cam->subrect.width, scale_h);
|
|
*height = scale_down(cam->subrect.height, scale_v);
|
|
|
|
dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* CEU can scale and crop, but we don't want to waste bandwidth and kill the
|
|
* framerate by always requesting the maximum image from the client. See
|
|
* Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of
|
|
* scaling and cropping algorithms and for the meaning of referenced here steps.
|
|
*/
|
|
static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
|
|
struct v4l2_crop *a)
|
|
{
|
|
struct v4l2_rect *rect = &a->c;
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
struct v4l2_crop cam_crop;
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct v4l2_rect *cam_rect = &cam_crop.c;
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct device *dev = icd->dev.parent;
|
|
struct v4l2_mbus_framefmt mf;
|
|
unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
|
|
out_width, out_height, scale_h, scale_v;
|
|
int interm_width, interm_height;
|
|
u32 capsr, cflcr;
|
|
int ret;
|
|
|
|
dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
|
|
rect->left, rect->top);
|
|
|
|
/* During camera cropping its output window can change too, stop CEU */
|
|
capsr = capture_save_reset(pcdev);
|
|
dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
|
|
|
|
/* 1. - 2. Apply iterative camera S_CROP for new input window. */
|
|
ret = client_s_crop(icd, a, &cam_crop);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
|
|
cam_rect->width, cam_rect->height,
|
|
cam_rect->left, cam_rect->top);
|
|
|
|
/* On success cam_crop contains current camera crop */
|
|
|
|
/* 3. Retrieve camera output window */
|
|
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (mf.width > 2560 || mf.height > 1920)
|
|
return -EINVAL;
|
|
|
|
/* Cache camera output window */
|
|
cam->width = mf.width;
|
|
cam->height = mf.height;
|
|
|
|
/* 4. Calculate camera scales */
|
|
scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
|
|
scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
|
|
|
|
/* Calculate intermediate window */
|
|
interm_width = scale_down(rect->width, scale_cam_h);
|
|
interm_height = scale_down(rect->height, scale_cam_v);
|
|
|
|
if (pcdev->image_mode) {
|
|
out_width = min(interm_width, icd->user_width);
|
|
out_height = min(interm_height, icd->user_height);
|
|
} else {
|
|
out_width = interm_width;
|
|
out_height = interm_height;
|
|
}
|
|
|
|
/*
|
|
* 5. Calculate CEU scales from camera scales from results of (5) and
|
|
* the user window
|
|
*/
|
|
scale_ceu_h = calc_scale(interm_width, &out_width);
|
|
scale_ceu_v = calc_scale(interm_height, &out_height);
|
|
|
|
/* Calculate camera scales */
|
|
scale_h = calc_generic_scale(cam_rect->width, out_width);
|
|
scale_v = calc_generic_scale(cam_rect->height, out_height);
|
|
|
|
dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
|
|
|
|
/* Apply CEU scales. */
|
|
cflcr = scale_ceu_h | (scale_ceu_v << 16);
|
|
if (cflcr != pcdev->cflcr) {
|
|
pcdev->cflcr = cflcr;
|
|
ceu_write(pcdev, CFLCR, cflcr);
|
|
}
|
|
|
|
icd->user_width = out_width;
|
|
icd->user_height = out_height;
|
|
cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_h) & ~1;
|
|
cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_v) & ~1;
|
|
|
|
/* 6. Use CEU cropping to crop to the new window. */
|
|
sh_mobile_ceu_set_rect(icd);
|
|
|
|
cam->subrect = *rect;
|
|
|
|
dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
|
|
icd->user_width, icd->user_height,
|
|
cam->ceu_left, cam->ceu_top);
|
|
|
|
/* Restore capture */
|
|
if (pcdev->active)
|
|
capsr |= 1;
|
|
capture_restore(pcdev, capsr);
|
|
|
|
/* Even if only camera cropping succeeded */
|
|
return ret;
|
|
}
|
|
|
|
static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
|
|
struct v4l2_crop *a)
|
|
{
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
|
|
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
a->c = cam->subrect;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Calculate real client output window by applying new scales to the current
|
|
* client crop. New scales are calculated from the requested output format and
|
|
* CEU crop, mapped backed onto the client input (subrect).
|
|
*/
|
|
static void calculate_client_output(struct soc_camera_device *icd,
|
|
struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
|
|
{
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct device *dev = icd->dev.parent;
|
|
struct v4l2_rect *cam_subrect = &cam->subrect;
|
|
unsigned int scale_v, scale_h;
|
|
|
|
if (cam_subrect->width == cam->rect.width &&
|
|
cam_subrect->height == cam->rect.height) {
|
|
/* No sub-cropping */
|
|
mf->width = pix->width;
|
|
mf->height = pix->height;
|
|
return;
|
|
}
|
|
|
|
/* 1.-2. Current camera scales and subwin - cached. */
|
|
|
|
dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
|
|
cam_subrect->width, cam_subrect->height,
|
|
cam_subrect->left, cam_subrect->top);
|
|
|
|
/*
|
|
* 3. Calculate new combined scales from input sub-window to requested
|
|
* user window.
|
|
*/
|
|
|
|
/*
|
|
* TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
|
|
* (128x96) or larger than VGA
|
|
*/
|
|
scale_h = calc_generic_scale(cam_subrect->width, pix->width);
|
|
scale_v = calc_generic_scale(cam_subrect->height, pix->height);
|
|
|
|
dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
|
|
|
|
/*
|
|
* 4. Calculate client output window by applying combined scales to real
|
|
* input window.
|
|
*/
|
|
mf->width = scale_down(cam->rect.width, scale_h);
|
|
mf->height = scale_down(cam->rect.height, scale_v);
|
|
}
|
|
|
|
/* Similar to set_crop multistage iterative algorithm */
|
|
static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
struct sh_mobile_ceu_cam *cam = icd->host_priv;
|
|
struct v4l2_pix_format *pix = &f->fmt.pix;
|
|
struct v4l2_mbus_framefmt mf;
|
|
struct device *dev = icd->dev.parent;
|
|
__u32 pixfmt = pix->pixelformat;
|
|
const struct soc_camera_format_xlate *xlate;
|
|
/* Keep Compiler Happy */
|
|
unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
|
|
u16 scale_v, scale_h;
|
|
int ret;
|
|
bool image_mode;
|
|
enum v4l2_field field;
|
|
|
|
dev_geo(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height);
|
|
|
|
switch (pix->field) {
|
|
default:
|
|
pix->field = V4L2_FIELD_NONE;
|
|
/* fall-through */
|
|
case V4L2_FIELD_INTERLACED_TB:
|
|
case V4L2_FIELD_INTERLACED_BT:
|
|
case V4L2_FIELD_NONE:
|
|
field = pix->field;
|
|
break;
|
|
case V4L2_FIELD_INTERLACED:
|
|
field = V4L2_FIELD_INTERLACED_TB;
|
|
break;
|
|
}
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(dev, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* 1.-4. Calculate client output geometry */
|
|
calculate_client_output(icd, &f->fmt.pix, &mf);
|
|
mf.field = pix->field;
|
|
mf.colorspace = pix->colorspace;
|
|
mf.code = xlate->code;
|
|
|
|
switch (pixfmt) {
|
|
case V4L2_PIX_FMT_NV12:
|
|
case V4L2_PIX_FMT_NV21:
|
|
case V4L2_PIX_FMT_NV16:
|
|
case V4L2_PIX_FMT_NV61:
|
|
image_mode = true;
|
|
break;
|
|
default:
|
|
image_mode = false;
|
|
}
|
|
|
|
dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
|
|
|
|
/* 5. - 9. */
|
|
ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
|
|
image_mode && V4L2_FIELD_NONE == field);
|
|
|
|
dev_geo(dev, "5-9: client scale return %d\n", ret);
|
|
|
|
/* Done with the camera. Now see if we can improve the result */
|
|
|
|
dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
|
|
mf.width, mf.height, pix->width, pix->height);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (mf.code != xlate->code)
|
|
return -EINVAL;
|
|
|
|
/* 9. Prepare CEU crop */
|
|
cam->width = mf.width;
|
|
cam->height = mf.height;
|
|
|
|
/* 10. Use CEU scaling to scale to the requested user window. */
|
|
|
|
/* We cannot scale up */
|
|
if (pix->width > ceu_sub_width)
|
|
ceu_sub_width = pix->width;
|
|
|
|
if (pix->height > ceu_sub_height)
|
|
ceu_sub_height = pix->height;
|
|
|
|
pix->colorspace = mf.colorspace;
|
|
|
|
if (image_mode) {
|
|
/* Scale pix->{width x height} down to width x height */
|
|
scale_h = calc_scale(ceu_sub_width, &pix->width);
|
|
scale_v = calc_scale(ceu_sub_height, &pix->height);
|
|
} else {
|
|
pix->width = ceu_sub_width;
|
|
pix->height = ceu_sub_height;
|
|
scale_h = 0;
|
|
scale_v = 0;
|
|
}
|
|
|
|
pcdev->cflcr = scale_h | (scale_v << 16);
|
|
|
|
/*
|
|
* We have calculated CFLCR, the actual configuration will be performed
|
|
* in sh_mobile_ceu_set_bus_param()
|
|
*/
|
|
|
|
dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
|
|
ceu_sub_width, scale_h, pix->width,
|
|
ceu_sub_height, scale_v, pix->height);
|
|
|
|
cam->code = xlate->code;
|
|
icd->current_fmt = xlate;
|
|
|
|
pcdev->field = field;
|
|
pcdev->image_mode = image_mode;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_format *f)
|
|
{
|
|
const struct soc_camera_format_xlate *xlate;
|
|
struct v4l2_pix_format *pix = &f->fmt.pix;
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct v4l2_mbus_framefmt mf;
|
|
__u32 pixfmt = pix->pixelformat;
|
|
int width, height;
|
|
int ret;
|
|
|
|
dev_geo(icd->dev.parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
|
|
pixfmt, pix->width, pix->height);
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* FIXME: calculate using depth and bus width */
|
|
|
|
v4l_bound_align_image(&pix->width, 2, 2560, 1,
|
|
&pix->height, 4, 1920, 2, 0);
|
|
|
|
width = pix->width;
|
|
height = pix->height;
|
|
|
|
pix->bytesperline = soc_mbus_bytes_per_line(width, xlate->host_fmt);
|
|
if ((int)pix->bytesperline < 0)
|
|
return pix->bytesperline;
|
|
pix->sizeimage = height * pix->bytesperline;
|
|
|
|
/* limit to sensor capabilities */
|
|
mf.width = pix->width;
|
|
mf.height = pix->height;
|
|
mf.field = pix->field;
|
|
mf.code = xlate->code;
|
|
mf.colorspace = pix->colorspace;
|
|
|
|
ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, try_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pix->width = mf.width;
|
|
pix->height = mf.height;
|
|
pix->field = mf.field;
|
|
pix->colorspace = mf.colorspace;
|
|
|
|
switch (pixfmt) {
|
|
case V4L2_PIX_FMT_NV12:
|
|
case V4L2_PIX_FMT_NV21:
|
|
case V4L2_PIX_FMT_NV16:
|
|
case V4L2_PIX_FMT_NV61:
|
|
/* FIXME: check against rect_max after converting soc-camera */
|
|
/* We can scale precisely, need a bigger image from camera */
|
|
if (pix->width < width || pix->height < height) {
|
|
/*
|
|
* We presume, the sensor behaves sanely, i.e., if
|
|
* requested a bigger rectangle, it will not return a
|
|
* smaller one.
|
|
*/
|
|
mf.width = 2560;
|
|
mf.height = 1920;
|
|
ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
|
|
try_mbus_fmt, &mf);
|
|
if (ret < 0) {
|
|
/* Shouldn't actually happen... */
|
|
dev_err(icd->dev.parent,
|
|
"FIXME: client try_fmt() = %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
/* We will scale exactly */
|
|
if (mf.width > width)
|
|
pix->width = width;
|
|
if (mf.height > height)
|
|
pix->height = height;
|
|
}
|
|
|
|
dev_geo(icd->dev.parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
|
|
__func__, ret, pix->pixelformat, pix->width, pix->height);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sh_mobile_ceu_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,
|
|
icd->dev.parent, &pcdev->lock,
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
|
pcdev->field,
|
|
sizeof(struct sh_mobile_ceu_buffer),
|
|
icd);
|
|
}
|
|
|
|
static int sh_mobile_ceu_get_parm(struct soc_camera_device *icd,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
|
|
return v4l2_subdev_call(sd, video, g_parm, parm);
|
|
}
|
|
|
|
static int sh_mobile_ceu_set_parm(struct soc_camera_device *icd,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
|
|
return v4l2_subdev_call(sd, video, s_parm, parm);
|
|
}
|
|
|
|
static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
u32 val;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_SHARPNESS:
|
|
val = ceu_read(pcdev, CLFCR);
|
|
ctrl->value = val ^ 1;
|
|
return 0;
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct sh_mobile_ceu_dev *pcdev = ici->priv;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_SHARPNESS:
|
|
switch (icd->current_fmt->host_fmt->fourcc) {
|
|
case V4L2_PIX_FMT_NV12:
|
|
case V4L2_PIX_FMT_NV21:
|
|
case V4L2_PIX_FMT_NV16:
|
|
case V4L2_PIX_FMT_NV61:
|
|
ceu_write(pcdev, CLFCR, !ctrl->value);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
|
|
{
|
|
.id = V4L2_CID_SHARPNESS,
|
|
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
|
.name = "Low-pass filter",
|
|
.minimum = 0,
|
|
.maximum = 1,
|
|
.step = 1,
|
|
.default_value = 0,
|
|
},
|
|
};
|
|
|
|
static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
|
|
.owner = THIS_MODULE,
|
|
.add = sh_mobile_ceu_add_device,
|
|
.remove = sh_mobile_ceu_remove_device,
|
|
.get_formats = sh_mobile_ceu_get_formats,
|
|
.put_formats = sh_mobile_ceu_put_formats,
|
|
.get_crop = sh_mobile_ceu_get_crop,
|
|
.set_crop = sh_mobile_ceu_set_crop,
|
|
.set_fmt = sh_mobile_ceu_set_fmt,
|
|
.try_fmt = sh_mobile_ceu_try_fmt,
|
|
.set_ctrl = sh_mobile_ceu_set_ctrl,
|
|
.get_ctrl = sh_mobile_ceu_get_ctrl,
|
|
.set_parm = sh_mobile_ceu_set_parm,
|
|
.get_parm = sh_mobile_ceu_get_parm,
|
|
.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,
|
|
.controls = sh_mobile_ceu_controls,
|
|
.num_controls = ARRAY_SIZE(sh_mobile_ceu_controls),
|
|
};
|
|
|
|
struct bus_wait {
|
|
struct notifier_block notifier;
|
|
struct completion completion;
|
|
struct device *dev;
|
|
};
|
|
|
|
static int bus_notify(struct notifier_block *nb,
|
|
unsigned long action, void *data)
|
|
{
|
|
struct device *dev = data;
|
|
struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
|
|
|
|
if (wait->dev != dev)
|
|
return NOTIFY_DONE;
|
|
|
|
switch (action) {
|
|
case BUS_NOTIFY_UNBOUND_DRIVER:
|
|
/* Protect from module unloading */
|
|
wait_for_completion(&wait->completion);
|
|
return NOTIFY_OK;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_ceu_dev *pcdev;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
unsigned int irq;
|
|
int err = 0;
|
|
struct bus_wait wait = {
|
|
.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
|
|
.notifier.notifier_call = bus_notify,
|
|
};
|
|
struct device *csi2;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (!res || (int)irq <= 0) {
|
|
dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
|
|
if (!pcdev) {
|
|
dev_err(&pdev->dev, "Could not allocate pcdev\n");
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&pcdev->capture);
|
|
spin_lock_init(&pcdev->lock);
|
|
|
|
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, resource_size(res));
|
|
if (!base) {
|
|
err = -ENXIO;
|
|
dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
|
|
goto exit_kfree;
|
|
}
|
|
|
|
pcdev->irq = irq;
|
|
pcdev->base = base;
|
|
pcdev->video_limit = 0; /* only enabled if second resource exists */
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (res) {
|
|
err = dma_declare_coherent_memory(&pdev->dev, res->start,
|
|
res->start,
|
|
resource_size(res),
|
|
DMA_MEMORY_MAP |
|
|
DMA_MEMORY_EXCLUSIVE);
|
|
if (!err) {
|
|
dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
|
|
err = -ENXIO;
|
|
goto exit_iounmap;
|
|
}
|
|
|
|
pcdev->video_limit = resource_size(res);
|
|
}
|
|
|
|
/* request irq */
|
|
err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
|
|
dev_name(&pdev->dev), pcdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
|
|
goto exit_release_mem;
|
|
}
|
|
|
|
pm_suspend_ignore_children(&pdev->dev, true);
|
|
pm_runtime_enable(&pdev->dev);
|
|
pm_runtime_resume(&pdev->dev);
|
|
|
|
pcdev->ici.priv = pcdev;
|
|
pcdev->ici.v4l2_dev.dev = &pdev->dev;
|
|
pcdev->ici.nr = pdev->id;
|
|
pcdev->ici.drv_name = dev_name(&pdev->dev);
|
|
pcdev->ici.ops = &sh_mobile_ceu_host_ops;
|
|
|
|
/* CSI2 interfacing */
|
|
csi2 = pcdev->pdata->csi2_dev;
|
|
if (csi2) {
|
|
wait.dev = csi2;
|
|
|
|
err = bus_register_notifier(&platform_bus_type, &wait.notifier);
|
|
if (err < 0)
|
|
goto exit_free_clk;
|
|
|
|
/*
|
|
* From this point the driver module will not unload, until
|
|
* we complete the completion.
|
|
*/
|
|
|
|
if (!csi2->driver || !csi2->driver->owner) {
|
|
complete(&wait.completion);
|
|
/* Either too late, or probing failed */
|
|
bus_unregister_notifier(&platform_bus_type, &wait.notifier);
|
|
err = -ENXIO;
|
|
goto exit_free_clk;
|
|
}
|
|
|
|
/*
|
|
* The module is still loaded, in the worst case it is hanging
|
|
* in device release on our completion. So, _now_ dereferencing
|
|
* the "owner" is safe!
|
|
*/
|
|
|
|
err = try_module_get(csi2->driver->owner);
|
|
|
|
/* Let notifier complete, if it has been locked */
|
|
complete(&wait.completion);
|
|
bus_unregister_notifier(&platform_bus_type, &wait.notifier);
|
|
if (!err) {
|
|
err = -ENODEV;
|
|
goto exit_free_clk;
|
|
}
|
|
}
|
|
|
|
err = soc_camera_host_register(&pcdev->ici);
|
|
if (err)
|
|
goto exit_module_put;
|
|
|
|
return 0;
|
|
|
|
exit_module_put:
|
|
if (csi2 && csi2->driver)
|
|
module_put(csi2->driver->owner);
|
|
exit_free_clk:
|
|
pm_runtime_disable(&pdev->dev);
|
|
free_irq(pcdev->irq, pcdev);
|
|
exit_release_mem:
|
|
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
|
|
dma_release_declared_memory(&pdev->dev);
|
|
exit_iounmap:
|
|
iounmap(base);
|
|
exit_kfree:
|
|
kfree(pcdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
|
|
{
|
|
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
|
|
struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
|
|
struct sh_mobile_ceu_dev, ici);
|
|
struct device *csi2 = pcdev->pdata->csi2_dev;
|
|
|
|
soc_camera_host_unregister(soc_host);
|
|
pm_runtime_disable(&pdev->dev);
|
|
free_irq(pcdev->irq, pcdev);
|
|
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
|
|
dma_release_declared_memory(&pdev->dev);
|
|
iounmap(pcdev->base);
|
|
if (csi2 && csi2->driver)
|
|
module_put(csi2->driver->owner);
|
|
kfree(pcdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sh_mobile_ceu_runtime_nop(struct device *dev)
|
|
{
|
|
/* Runtime PM callback shared between ->runtime_suspend()
|
|
* and ->runtime_resume(). Simply returns success.
|
|
*
|
|
* This driver re-initializes all registers after
|
|
* pm_runtime_get_sync() anyway so there is no need
|
|
* to save and restore registers here.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
|
|
.runtime_suspend = sh_mobile_ceu_runtime_nop,
|
|
.runtime_resume = sh_mobile_ceu_runtime_nop,
|
|
};
|
|
|
|
static struct platform_driver sh_mobile_ceu_driver = {
|
|
.driver = {
|
|
.name = "sh_mobile_ceu",
|
|
.pm = &sh_mobile_ceu_dev_pm_ops,
|
|
},
|
|
.probe = sh_mobile_ceu_probe,
|
|
.remove = __devexit_p(sh_mobile_ceu_remove),
|
|
};
|
|
|
|
static int __init sh_mobile_ceu_init(void)
|
|
{
|
|
/* Whatever return code */
|
|
request_module("sh_mobile_csi2");
|
|
return platform_driver_register(&sh_mobile_ceu_driver);
|
|
}
|
|
|
|
static void __exit sh_mobile_ceu_exit(void)
|
|
{
|
|
platform_driver_unregister(&sh_mobile_ceu_driver);
|
|
}
|
|
|
|
module_init(sh_mobile_ceu_init);
|
|
module_exit(sh_mobile_ceu_exit);
|
|
|
|
MODULE_DESCRIPTION("SuperH Mobile CEU driver");
|
|
MODULE_AUTHOR("Magnus Damm");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:sh_mobile_ceu");
|