forked from Minki/linux
7102b773d5
This patch addresses most issues pointed out by Russell and Erik, moves recently introduced into pxa-regs.h camera-specific defines into pxa_camera.c, removes dummy power-management functions, improves function-naming, etc. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
916 lines
23 KiB
C
916 lines
23 KiB
C
/*
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* V4L2 Driver for PXA camera host
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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/mutex.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 <linux/videodev2.h>
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#include <asm/dma.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/camera.h>
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#define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5)
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#define PXA_CAM_DRV_NAME "pxa27x-camera"
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#define CICR0_SIM_MP (0 << 24)
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#define CICR0_SIM_SP (1 << 24)
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#define CICR0_SIM_MS (2 << 24)
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#define CICR0_SIM_EP (3 << 24)
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#define CICR0_SIM_ES (4 << 24)
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#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
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#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
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#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
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#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
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#define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
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#define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
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#define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
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#define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
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#define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
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#define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
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#define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
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#define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
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CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
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CICR0_EOFM | CICR0_FOM)
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static DEFINE_MUTEX(camera_lock);
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/*
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* Structures
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*/
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/* buffer for one video frame */
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struct pxa_buffer {
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/* common v4l buffer stuff -- must be first */
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struct videobuf_buffer vb;
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const struct soc_camera_data_format *fmt;
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/* our descriptor list needed for the PXA DMA engine */
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dma_addr_t sg_dma;
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struct pxa_dma_desc *sg_cpu;
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size_t sg_size;
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int inwork;
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};
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struct pxa_framebuffer_queue {
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dma_addr_t sg_last_dma;
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struct pxa_dma_desc *sg_last_cpu;
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};
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struct pxa_camera_dev {
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struct device *dev;
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/* PXA27x is only supposed to handle one camera on its Quick Capture
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* interface. If anyone ever builds hardware to enable more than
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* one camera, they will have to modify this driver too */
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struct soc_camera_device *icd;
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struct clk *clk;
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unsigned int irq;
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void __iomem *base;
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unsigned int dma_chan_y;
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struct pxacamera_platform_data *pdata;
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struct resource *res;
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unsigned long platform_flags;
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unsigned long platform_mclk_10khz;
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struct list_head capture;
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spinlock_t lock;
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struct pxa_buffer *active;
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};
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static const char *pxa_cam_driver_description = "PXA_Camera";
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static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
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/*
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* Videobuf operations
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*/
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static int pxa_videobuf_setup(struct videobuf_queue *vq, 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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dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
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*size = icd->width * icd->height * ((icd->current_fmt->depth + 7) >> 3);
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if (0 == *count)
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*count = 32;
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while (*size * *count > vid_limit * 1024 * 1024)
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(*count)--;
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return 0;
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}
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static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
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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 =
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to_soc_camera_host(icd->dev.parent);
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struct pxa_camera_dev *pcdev = ici->priv;
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struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
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BUG_ON(in_interrupt());
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
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&buf->vb, buf->vb.baddr, buf->vb.bsize);
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/* This waits until this buffer is out of danger, i.e., until it is no
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* longer in STATE_QUEUED or STATE_ACTIVE */
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videobuf_waiton(&buf->vb, 0, 0);
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videobuf_dma_unmap(vq, dma);
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videobuf_dma_free(dma);
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if (buf->sg_cpu)
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dma_free_coherent(pcdev->dev, buf->sg_size, buf->sg_cpu,
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buf->sg_dma);
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buf->sg_cpu = NULL;
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buf->vb.state = VIDEOBUF_NEEDS_INIT;
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}
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static int pxa_videobuf_prepare(struct videobuf_queue *vq,
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struct videobuf_buffer *vb, 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 soc_camera_host *ici =
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to_soc_camera_host(icd->dev.parent);
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struct pxa_camera_dev *pcdev = ici->priv;
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struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
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int i, ret;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
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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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/* I think, in buf_prepare you only have to protect global data,
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* the actual buffer is yours */
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buf->inwork = 1;
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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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unsigned int size = vb->size;
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struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
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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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if (buf->sg_cpu)
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dma_free_coherent(pcdev->dev, buf->sg_size, buf->sg_cpu,
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buf->sg_dma);
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buf->sg_size = (dma->sglen + 1) * sizeof(struct pxa_dma_desc);
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buf->sg_cpu = dma_alloc_coherent(pcdev->dev, buf->sg_size,
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&buf->sg_dma, GFP_KERNEL);
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if (!buf->sg_cpu) {
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ret = -ENOMEM;
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goto fail;
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}
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dev_dbg(&icd->dev, "nents=%d size: %d sg=0x%p\n",
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dma->sglen, size, dma->sglist);
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for (i = 0; i < dma->sglen; i++) {
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struct scatterlist *sg = dma->sglist;
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unsigned int dma_len = sg_dma_len(&sg[i]), xfer_len;
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/* CIBR0 */
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buf->sg_cpu[i].dsadr = pcdev->res->start + 0x28;
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buf->sg_cpu[i].dtadr = sg_dma_address(&sg[i]);
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/* PXA270 Developer's Manual 27.4.4.1:
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* round up to 8 bytes */
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xfer_len = (min(dma_len, size) + 7) & ~7;
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if (xfer_len & 7)
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dev_err(&icd->dev, "Unaligned buffer: "
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"dma_len %u, size %u\n", dma_len, size);
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buf->sg_cpu[i].dcmd = DCMD_FLOWSRC | DCMD_BURST8 |
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DCMD_INCTRGADDR | xfer_len;
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size -= dma_len;
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buf->sg_cpu[i].ddadr = buf->sg_dma + (i + 1) *
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sizeof(struct pxa_dma_desc);
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}
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buf->sg_cpu[dma->sglen - 1].ddadr = DDADR_STOP;
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buf->sg_cpu[dma->sglen - 1].dcmd |= DCMD_ENDIRQEN;
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vb->state = VIDEOBUF_PREPARED;
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}
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buf->inwork = 0;
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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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buf->inwork = 0;
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return ret;
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}
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static void pxa_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 =
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to_soc_camera_host(icd->dev.parent);
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struct pxa_camera_dev *pcdev = ici->priv;
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struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
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struct pxa_buffer *active;
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struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
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int nents = dma->sglen;
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unsigned long flags;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
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vb, vb->baddr, vb->bsize);
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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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vb->state = VIDEOBUF_ACTIVE;
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active = pcdev->active;
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if (!active) {
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CIFR |= CIFR_RESET_F;
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DDADR(pcdev->dma_chan_y) = buf->sg_dma;
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DCSR(pcdev->dma_chan_y) = DCSR_RUN;
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pcdev->active = buf;
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CICR0 |= CICR0_ENB;
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} else {
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struct videobuf_dmabuf *active_dma =
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videobuf_to_dma(&active->vb);
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/* Stop DMA engine */
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DCSR(pcdev->dma_chan_y) = 0;
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/* Add the descriptors we just initialized to the currently
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* running chain
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*/
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active->sg_cpu[active_dma->sglen - 1].ddadr = buf->sg_dma;
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/* Setup a dummy descriptor with the DMA engines current
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* state
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*/
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/* CIBR0 */
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buf->sg_cpu[nents].dsadr = pcdev->res->start + 0x28;
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buf->sg_cpu[nents].dtadr = DTADR(pcdev->dma_chan_y);
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buf->sg_cpu[nents].dcmd = DCMD(pcdev->dma_chan_y);
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if (DDADR(pcdev->dma_chan_y) == DDADR_STOP) {
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/* The DMA engine is on the last descriptor, set the
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* next descriptors address to the descriptors
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* we just initialized
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*/
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buf->sg_cpu[nents].ddadr = buf->sg_dma;
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} else {
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buf->sg_cpu[nents].ddadr = DDADR(pcdev->dma_chan_y);
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}
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/* The next descriptor is the dummy descriptor */
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DDADR(pcdev->dma_chan_y) = buf->sg_dma + nents *
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sizeof(struct pxa_dma_desc);
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#ifdef DEBUG
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if (CISR & CISR_IFO_0) {
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dev_warn(pcdev->dev, "FIFO overrun\n");
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DDADR(pcdev->dma_chan_y) = pcdev->active->sg_dma;
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CICR0 &= ~CICR0_ENB;
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CIFR |= CIFR_RESET_F;
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DCSR(pcdev->dma_chan_y) = DCSR_RUN;
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CICR0 |= CICR0_ENB;
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} else
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#endif
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DCSR(pcdev->dma_chan_y) = DCSR_RUN;
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}
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spin_unlock_irqrestore(&pcdev->lock, flags);
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}
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static void pxa_videobuf_release(struct videobuf_queue *vq,
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struct videobuf_buffer *vb)
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{
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struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
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#ifdef DEBUG
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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 %d\n", __FUNCTION__,
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vb, vb->baddr, vb->bsize);
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switch (vb->state) {
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case VIDEOBUF_ACTIVE:
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dev_dbg(&icd->dev, "%s (active)\n", __FUNCTION__);
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break;
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case VIDEOBUF_QUEUED:
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dev_dbg(&icd->dev, "%s (queued)\n", __FUNCTION__);
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break;
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case VIDEOBUF_PREPARED:
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dev_dbg(&icd->dev, "%s (prepared)\n", __FUNCTION__);
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break;
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default:
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dev_dbg(&icd->dev, "%s (unknown)\n", __FUNCTION__);
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break;
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}
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#endif
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free_buffer(vq, buf);
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}
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static void pxa_camera_dma_irq_y(int channel, void *data)
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{
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struct pxa_camera_dev *pcdev = data;
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struct pxa_buffer *buf;
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unsigned long flags;
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unsigned int status;
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struct videobuf_buffer *vb;
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spin_lock_irqsave(&pcdev->lock, flags);
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status = DCSR(pcdev->dma_chan_y);
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DCSR(pcdev->dma_chan_y) = status;
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if (status & DCSR_BUSERR) {
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dev_err(pcdev->dev, "DMA Bus Error IRQ!\n");
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goto out;
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}
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if (!(status & DCSR_ENDINTR)) {
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dev_err(pcdev->dev, "Unknown DMA IRQ source, "
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"status: 0x%08x\n", status);
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goto out;
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}
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if (!pcdev->active) {
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dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n");
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goto out;
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}
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vb = &pcdev->active->vb;
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buf = container_of(vb, struct pxa_buffer, vb);
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WARN_ON(buf->inwork || list_empty(&vb->queue));
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dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
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vb, vb->baddr, vb->bsize);
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/* _init is used to debug races, see comment in pxa_camera_reqbufs() */
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list_del_init(&vb->queue);
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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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if (list_empty(&pcdev->capture)) {
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pcdev->active = NULL;
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DCSR(pcdev->dma_chan_y) = 0;
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CICR0 &= ~CICR0_ENB;
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goto out;
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}
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pcdev->active = list_entry(pcdev->capture.next, struct pxa_buffer,
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vb.queue);
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out:
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spin_unlock_irqrestore(&pcdev->lock, flags);
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}
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|
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static struct videobuf_queue_ops pxa_videobuf_ops = {
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.buf_setup = pxa_videobuf_setup,
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.buf_prepare = pxa_videobuf_prepare,
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.buf_queue = pxa_videobuf_queue,
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.buf_release = pxa_videobuf_release,
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};
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|
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static int mclk_get_divisor(struct pxa_camera_dev *pcdev)
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{
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unsigned int mclk_10khz = pcdev->platform_mclk_10khz;
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unsigned long div;
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unsigned long lcdclk;
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lcdclk = clk_get_rate(pcdev->clk) / 10000;
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|
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/* We verify platform_mclk_10khz != 0, so if anyone breaks it, here
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* they get a nice Oops */
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div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1;
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dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, "
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"divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div);
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|
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return div;
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}
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|
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static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
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{
|
|
struct pxacamera_platform_data *pdata = pcdev->pdata;
|
|
u32 cicr4 = 0;
|
|
|
|
dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n",
|
|
pcdev, pdata);
|
|
|
|
if (pdata && pdata->init) {
|
|
dev_dbg(pcdev->dev, "%s: Init gpios\n", __FUNCTION__);
|
|
pdata->init(pcdev->dev);
|
|
}
|
|
|
|
if (pdata && pdata->power) {
|
|
dev_dbg(pcdev->dev, "%s: Power on camera\n", __FUNCTION__);
|
|
pdata->power(pcdev->dev, 1);
|
|
}
|
|
|
|
if (pdata && pdata->reset) {
|
|
dev_dbg(pcdev->dev, "%s: Releasing camera reset\n",
|
|
__FUNCTION__);
|
|
pdata->reset(pcdev->dev, 1);
|
|
}
|
|
|
|
CICR0 = 0x3FF; /* disable all interrupts */
|
|
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
|
|
cicr4 |= CICR4_PCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
|
|
cicr4 |= CICR4_MCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCP)
|
|
cicr4 |= CICR4_PCP;
|
|
if (pcdev->platform_flags & PXA_CAMERA_HSP)
|
|
cicr4 |= CICR4_HSP;
|
|
if (pcdev->platform_flags & PXA_CAMERA_VSP)
|
|
cicr4 |= CICR4_VSP;
|
|
|
|
CICR4 = mclk_get_divisor(pcdev) | cicr4;
|
|
|
|
clk_enable(pcdev->clk);
|
|
}
|
|
|
|
static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
|
|
{
|
|
struct pxacamera_platform_data *board = pcdev->pdata;
|
|
|
|
clk_disable(pcdev->clk);
|
|
|
|
if (board && board->reset) {
|
|
dev_dbg(pcdev->dev, "%s: Asserting camera reset\n",
|
|
__FUNCTION__);
|
|
board->reset(pcdev->dev, 0);
|
|
}
|
|
|
|
if (board && board->power) {
|
|
dev_dbg(pcdev->dev, "%s: Power off camera\n", __FUNCTION__);
|
|
board->power(pcdev->dev, 0);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t pxa_camera_irq(int irq, void *data)
|
|
{
|
|
struct pxa_camera_dev *pcdev = data;
|
|
unsigned int status = CISR;
|
|
|
|
dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status);
|
|
|
|
CISR = status;
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* The following two functions absolutely depend on the fact, that
|
|
* there can be only one camera on PXA quick capture interface */
|
|
static int pxa_camera_add_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
int ret;
|
|
|
|
mutex_lock(&camera_lock);
|
|
|
|
if (pcdev->icd) {
|
|
ret = -EBUSY;
|
|
goto ebusy;
|
|
}
|
|
|
|
dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n",
|
|
icd->devnum);
|
|
|
|
pxa_camera_activate(pcdev);
|
|
ret = icd->ops->init(icd);
|
|
|
|
if (!ret)
|
|
pcdev->icd = icd;
|
|
|
|
ebusy:
|
|
mutex_unlock(&camera_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void pxa_camera_remove_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
|
|
BUG_ON(icd != pcdev->icd);
|
|
|
|
dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n",
|
|
icd->devnum);
|
|
|
|
/* disable capture, disable interrupts */
|
|
CICR0 = 0x3ff;
|
|
/* Stop DMA engine */
|
|
DCSR(pcdev->dma_chan_y) = 0;
|
|
|
|
icd->ops->release(icd);
|
|
|
|
pxa_camera_deactivate(pcdev);
|
|
|
|
pcdev->icd = NULL;
|
|
}
|
|
|
|
static int pxa_camera_set_capture_format(struct soc_camera_device *icd,
|
|
__u32 pixfmt, struct v4l2_rect *rect)
|
|
{
|
|
struct soc_camera_host *ici =
|
|
to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
unsigned int datawidth = 0, dw, bpp;
|
|
u32 cicr0, cicr4 = 0;
|
|
int ret;
|
|
|
|
/* If requested data width is supported by the platform, use it */
|
|
switch (icd->cached_datawidth) {
|
|
case 10:
|
|
if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)
|
|
datawidth = IS_DATAWIDTH_10;
|
|
break;
|
|
case 9:
|
|
if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)
|
|
datawidth = IS_DATAWIDTH_9;
|
|
break;
|
|
case 8:
|
|
if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)
|
|
datawidth = IS_DATAWIDTH_8;
|
|
}
|
|
if (!datawidth)
|
|
return -EINVAL;
|
|
|
|
ret = icd->ops->set_capture_format(icd, pixfmt, rect,
|
|
datawidth |
|
|
(pcdev->platform_flags & PXA_CAMERA_MASTER ?
|
|
IS_MASTER : 0) |
|
|
(pcdev->platform_flags & PXA_CAMERA_HSP ?
|
|
0 : IS_HSYNC_ACTIVE_HIGH) |
|
|
(pcdev->platform_flags & PXA_CAMERA_VSP ?
|
|
0 : IS_VSYNC_ACTIVE_HIGH) |
|
|
(pcdev->platform_flags & PXA_CAMERA_PCP ?
|
|
0 : IS_PCLK_SAMPLE_RISING));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Datawidth is now guaranteed to be equal to one of the three values.
|
|
* We fix bit-per-pixel equal to data-width... */
|
|
switch (datawidth) {
|
|
case IS_DATAWIDTH_10:
|
|
icd->cached_datawidth = 10;
|
|
dw = 4;
|
|
bpp = 0x40;
|
|
break;
|
|
case IS_DATAWIDTH_9:
|
|
icd->cached_datawidth = 9;
|
|
dw = 3;
|
|
bpp = 0x20;
|
|
break;
|
|
default:
|
|
/* Actually it can only be 8 now,
|
|
* default is just to silence compiler warnings */
|
|
case IS_DATAWIDTH_8:
|
|
icd->cached_datawidth = 8;
|
|
dw = 2;
|
|
bpp = 0;
|
|
}
|
|
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
|
|
cicr4 |= CICR4_PCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
|
|
cicr4 |= CICR4_MCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCP)
|
|
cicr4 |= CICR4_PCP;
|
|
if (pcdev->platform_flags & PXA_CAMERA_HSP)
|
|
cicr4 |= CICR4_HSP;
|
|
if (pcdev->platform_flags & PXA_CAMERA_VSP)
|
|
cicr4 |= CICR4_VSP;
|
|
|
|
cicr0 = CICR0;
|
|
if (cicr0 & CICR0_ENB)
|
|
CICR0 = cicr0 & ~CICR0_ENB;
|
|
CICR1 = CICR1_PPL_VAL(rect->width - 1) | bpp | dw;
|
|
CICR2 = 0;
|
|
CICR3 = CICR3_LPF_VAL(rect->height - 1) |
|
|
CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top));
|
|
CICR4 = mclk_get_divisor(pcdev) | cicr4;
|
|
|
|
/* CIF interrupts are not used, only DMA */
|
|
CICR0 = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
|
|
CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) |
|
|
CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_camera_try_fmt_cap(struct soc_camera_host *ici,
|
|
struct v4l2_format *f)
|
|
{
|
|
/* limit to pxa hardware capabilities */
|
|
if (f->fmt.pix.height < 32)
|
|
f->fmt.pix.height = 32;
|
|
if (f->fmt.pix.height > 2048)
|
|
f->fmt.pix.height = 2048;
|
|
if (f->fmt.pix.width < 48)
|
|
f->fmt.pix.width = 48;
|
|
if (f->fmt.pix.width > 2048)
|
|
f->fmt.pix.width = 2048;
|
|
f->fmt.pix.width &= ~0x01;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_camera_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 pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i],
|
|
struct pxa_buffer, vb);
|
|
buf->inwork = 0;
|
|
INIT_LIST_HEAD(&buf->vb.queue);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int pxa_camera_poll(struct file *file, poll_table *pt)
|
|
{
|
|
struct soc_camera_file *icf = file->private_data;
|
|
struct pxa_buffer *buf;
|
|
|
|
buf = list_entry(icf->vb_vidq.stream.next, struct pxa_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 pxa_camera_querycap(struct soc_camera_host *ici,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
/* cap->name is set by the firendly caller:-> */
|
|
strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
|
|
cap->version = PXA_CAM_VERSION_CODE;
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Should beallocated dynamically too, but we have only one. */
|
|
static struct soc_camera_host pxa_soc_camera_host = {
|
|
.drv_name = PXA_CAM_DRV_NAME,
|
|
.vbq_ops = &pxa_videobuf_ops,
|
|
.add = pxa_camera_add_device,
|
|
.remove = pxa_camera_remove_device,
|
|
.msize = sizeof(struct pxa_buffer),
|
|
.set_capture_format = pxa_camera_set_capture_format,
|
|
.try_fmt_cap = pxa_camera_try_fmt_cap,
|
|
.reqbufs = pxa_camera_reqbufs,
|
|
.poll = pxa_camera_poll,
|
|
.querycap = pxa_camera_querycap,
|
|
};
|
|
|
|
static int pxa_camera_probe(struct platform_device *pdev)
|
|
{
|
|
struct pxa_camera_dev *pcdev;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
unsigned int irq;
|
|
int err = 0;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (!res || !irq) {
|
|
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;
|
|
}
|
|
|
|
pcdev->clk = clk_get(&pdev->dev, "CAMCLK");
|
|
if (IS_ERR(pcdev->clk)) {
|
|
err = PTR_ERR(pcdev->clk);
|
|
goto exit_kfree;
|
|
}
|
|
|
|
dev_set_drvdata(&pdev->dev, pcdev);
|
|
pcdev->res = res;
|
|
|
|
pcdev->pdata = pdev->dev.platform_data;
|
|
pcdev->platform_flags = pcdev->pdata->flags;
|
|
if (!pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
|
|
PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10)) {
|
|
/* Platform hasn't set available data widths. This is bad.
|
|
* Warn and use a default. */
|
|
dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
|
|
"data widths, using default 10 bit\n");
|
|
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
|
|
}
|
|
pcdev->platform_mclk_10khz = pcdev->pdata->mclk_10khz;
|
|
if (!pcdev->platform_mclk_10khz) {
|
|
dev_warn(&pdev->dev,
|
|
"mclk_10khz == 0! Please, fix your platform data. "
|
|
"Using default 20MHz\n");
|
|
pcdev->platform_mclk_10khz = 2000;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&pcdev->capture);
|
|
spin_lock_init(&pcdev->lock);
|
|
|
|
/*
|
|
* Request the regions.
|
|
*/
|
|
if (!request_mem_region(res->start, res->end - res->start + 1,
|
|
PXA_CAM_DRV_NAME)) {
|
|
err = -EBUSY;
|
|
goto exit_clk;
|
|
}
|
|
|
|
base = ioremap(res->start, res->end - res->start + 1);
|
|
if (!base) {
|
|
err = -ENOMEM;
|
|
goto exit_release;
|
|
}
|
|
pcdev->irq = irq;
|
|
pcdev->base = base;
|
|
pcdev->dev = &pdev->dev;
|
|
|
|
/* request dma */
|
|
pcdev->dma_chan_y = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
|
|
pxa_camera_dma_irq_y, pcdev);
|
|
if (pcdev->dma_chan_y < 0) {
|
|
dev_err(pcdev->dev, "Can't request DMA for Y\n");
|
|
err = -ENOMEM;
|
|
goto exit_iounmap;
|
|
}
|
|
dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chan_y);
|
|
|
|
DRCMR68 = pcdev->dma_chan_y | DRCMR_MAPVLD;
|
|
|
|
/* request irq */
|
|
err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
|
|
pcdev);
|
|
if (err) {
|
|
dev_err(pcdev->dev, "Camera interrupt register failed \n");
|
|
goto exit_free_dma;
|
|
}
|
|
|
|
pxa_soc_camera_host.priv = pcdev;
|
|
pxa_soc_camera_host.dev.parent = &pdev->dev;
|
|
pxa_soc_camera_host.nr = pdev->id;
|
|
err = soc_camera_host_register(&pxa_soc_camera_host, THIS_MODULE);
|
|
if (err)
|
|
goto exit_free_irq;
|
|
|
|
return 0;
|
|
|
|
exit_free_irq:
|
|
free_irq(pcdev->irq, pcdev);
|
|
exit_free_dma:
|
|
pxa_free_dma(pcdev->dma_chan_y);
|
|
exit_iounmap:
|
|
iounmap(base);
|
|
exit_release:
|
|
release_mem_region(res->start, res->end - res->start + 1);
|
|
exit_clk:
|
|
clk_put(pcdev->clk);
|
|
exit_kfree:
|
|
kfree(pcdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit pxa_camera_remove(struct platform_device *pdev)
|
|
{
|
|
struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
|
|
clk_put(pcdev->clk);
|
|
|
|
pxa_free_dma(pcdev->dma_chan_y);
|
|
free_irq(pcdev->irq, pcdev);
|
|
|
|
soc_camera_host_unregister(&pxa_soc_camera_host);
|
|
|
|
iounmap(pcdev->base);
|
|
|
|
res = pcdev->res;
|
|
release_mem_region(res->start, res->end - res->start + 1);
|
|
|
|
kfree(pcdev);
|
|
|
|
dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver pxa_camera_driver = {
|
|
.driver = {
|
|
.name = PXA_CAM_DRV_NAME,
|
|
},
|
|
.probe = pxa_camera_probe,
|
|
.remove = __exit_p(pxa_camera_remove),
|
|
};
|
|
|
|
|
|
static int __devinit pxa_camera_init(void)
|
|
{
|
|
return platform_driver_register(&pxa_camera_driver);
|
|
}
|
|
|
|
static void __exit pxa_camera_exit(void)
|
|
{
|
|
return platform_driver_unregister(&pxa_camera_driver);
|
|
}
|
|
|
|
module_init(pxa_camera_init);
|
|
module_exit(pxa_camera_exit);
|
|
|
|
MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
|
|
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
|
|
MODULE_LICENSE("GPL");
|