![Guennadi Liakhovetski](/assets/img/avatar_default.png)
Use the V4L mutex infrastructure in soc-camera core and drivers and switch to .unlocked_ioctl. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1318 lines
35 KiB
C
1318 lines
35 KiB
C
/*
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* V4L2 Driver for i.MX3x camera host
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*
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* Copyright (C) 2008
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* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.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 version 2 as
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* published by the Free Software Foundation.
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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/version.h>
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#include <linux/videodev2.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/vmalloc.h>
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#include <linux/interrupt.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/videobuf-dma-contig.h>
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#include <media/soc_camera.h>
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#include <media/soc_mediabus.h>
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#include <mach/ipu.h>
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#include <mach/mx3_camera.h>
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#include <mach/dma.h>
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#define MX3_CAM_DRV_NAME "mx3-camera"
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/* CMOS Sensor Interface Registers */
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#define CSI_REG_START 0x60
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#define CSI_SENS_CONF (0x60 - CSI_REG_START)
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#define CSI_SENS_FRM_SIZE (0x64 - CSI_REG_START)
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#define CSI_ACT_FRM_SIZE (0x68 - CSI_REG_START)
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#define CSI_OUT_FRM_CTRL (0x6C - CSI_REG_START)
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#define CSI_TST_CTRL (0x70 - CSI_REG_START)
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#define CSI_CCIR_CODE_1 (0x74 - CSI_REG_START)
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#define CSI_CCIR_CODE_2 (0x78 - CSI_REG_START)
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#define CSI_CCIR_CODE_3 (0x7C - CSI_REG_START)
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#define CSI_FLASH_STROBE_1 (0x80 - CSI_REG_START)
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#define CSI_FLASH_STROBE_2 (0x84 - CSI_REG_START)
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#define CSI_SENS_CONF_VSYNC_POL_SHIFT 0
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#define CSI_SENS_CONF_HSYNC_POL_SHIFT 1
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#define CSI_SENS_CONF_DATA_POL_SHIFT 2
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#define CSI_SENS_CONF_PIX_CLK_POL_SHIFT 3
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#define CSI_SENS_CONF_SENS_PRTCL_SHIFT 4
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#define CSI_SENS_CONF_SENS_CLKSRC_SHIFT 7
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#define CSI_SENS_CONF_DATA_FMT_SHIFT 8
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#define CSI_SENS_CONF_DATA_WIDTH_SHIFT 10
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#define CSI_SENS_CONF_EXT_VSYNC_SHIFT 15
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#define CSI_SENS_CONF_DIVRATIO_SHIFT 16
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#define CSI_SENS_CONF_DATA_FMT_RGB_YUV444 (0UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
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#define CSI_SENS_CONF_DATA_FMT_YUV422 (2UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
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#define CSI_SENS_CONF_DATA_FMT_BAYER (3UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
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#define MAX_VIDEO_MEM 16
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struct mx3_camera_buffer {
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/* common v4l buffer stuff -- must be first */
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struct videobuf_buffer vb;
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enum v4l2_mbus_pixelcode code;
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/* One descriptot per scatterlist (per frame) */
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struct dma_async_tx_descriptor *txd;
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/* We have to "build" a scatterlist ourselves - one element per frame */
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struct scatterlist sg;
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};
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/**
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* struct mx3_camera_dev - i.MX3x camera (CSI) object
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* @dev: camera device, to which the coherent buffer is attached
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* @icd: currently attached camera sensor
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* @clk: pointer to clock
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* @base: remapped register base address
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* @pdata: platform data
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* @platform_flags: platform flags
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* @mclk: master clock frequency in Hz
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* @capture: list of capture videobuffers
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* @lock: protects video buffer lists
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* @active: active video buffer
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* @idmac_channel: array of pointers to IPU DMAC DMA channels
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* @soc_host: embedded soc_host object
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*/
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struct mx3_camera_dev {
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/*
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* i.MX3x is only supposed to handle one camera on its Camera Sensor
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* Interface. If anyone ever builds hardware to enable more than one
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* camera _simultaneously_, they will have to modify this driver too
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*/
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struct soc_camera_device *icd;
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struct clk *clk;
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void __iomem *base;
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struct mx3_camera_pdata *pdata;
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unsigned long platform_flags;
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unsigned long mclk;
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struct list_head capture;
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spinlock_t lock; /* Protects video buffer lists */
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struct mx3_camera_buffer *active;
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/* IDMAC / dmaengine interface */
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struct idmac_channel *idmac_channel[1]; /* We need one channel */
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struct soc_camera_host soc_host;
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};
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struct dma_chan_request {
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struct mx3_camera_dev *mx3_cam;
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enum ipu_channel id;
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};
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static u32 csi_reg_read(struct mx3_camera_dev *mx3, off_t reg)
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{
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return __raw_readl(mx3->base + reg);
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}
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static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg)
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{
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__raw_writel(value, mx3->base + reg);
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}
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/* Called from the IPU IDMAC ISR */
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static void mx3_cam_dma_done(void *arg)
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{
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struct idmac_tx_desc *desc = to_tx_desc(arg);
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struct dma_chan *chan = desc->txd.chan;
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struct idmac_channel *ichannel = to_idmac_chan(chan);
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struct mx3_camera_dev *mx3_cam = ichannel->client;
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struct videobuf_buffer *vb;
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dev_dbg(chan->device->dev, "callback cookie %d, active DMA 0x%08x\n",
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desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0);
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spin_lock(&mx3_cam->lock);
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if (mx3_cam->active) {
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vb = &mx3_cam->active->vb;
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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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}
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if (list_empty(&mx3_cam->capture)) {
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mx3_cam->active = NULL;
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spin_unlock(&mx3_cam->lock);
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/*
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* stop capture - without further buffers IPU_CHA_BUF0_RDY will
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* not get updated
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*/
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return;
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}
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mx3_cam->active = list_entry(mx3_cam->capture.next,
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struct mx3_camera_buffer, vb.queue);
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mx3_cam->active->vb.state = VIDEOBUF_ACTIVE;
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spin_unlock(&mx3_cam->lock);
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}
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static void free_buffer(struct videobuf_queue *vq, struct mx3_camera_buffer *buf)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct videobuf_buffer *vb = &buf->vb;
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struct dma_async_tx_descriptor *txd = buf->txd;
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struct idmac_channel *ichan;
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BUG_ON(in_interrupt());
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dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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vb, vb->baddr, vb->bsize);
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/*
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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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*/
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videobuf_waiton(vq, vb, 0, 0);
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if (txd) {
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ichan = to_idmac_chan(txd->chan);
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async_tx_ack(txd);
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}
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videobuf_dma_contig_free(vq, vb);
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buf->txd = NULL;
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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/*
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* Videobuf operations
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*/
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/*
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* Calculate the __buffer__ (not data) size and number of buffers.
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* Called with .vb_lock held
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*/
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static int mx3_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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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = 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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if (!mx3_cam->idmac_channel[0])
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return -EINVAL;
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*size = bytes_per_line * icd->user_height;
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if (!*count)
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*count = 32;
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if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
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*count = MAX_VIDEO_MEM * 1024 * 1024 / *size;
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return 0;
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}
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/* Called with .vb_lock held */
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static int mx3_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 = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = ici->priv;
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struct mx3_camera_buffer *buf =
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container_of(vb, struct mx3_camera_buffer, vb);
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size_t new_size;
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int ret;
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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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new_size = bytes_per_line * icd->user_height;
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/*
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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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*/
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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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if (vb->state != VIDEOBUF_NEEDS_INIT)
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free_buffer(vq, buf);
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}
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if (vb->baddr && vb->bsize < new_size) {
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/* User provided buffer, but it is too small */
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ret = -ENOMEM;
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goto out;
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}
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if (vb->state == VIDEOBUF_NEEDS_INIT) {
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struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
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struct scatterlist *sg = &buf->sg;
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/*
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* The total size of video-buffers that will be allocated / mapped.
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* *size that we calculated in videobuf_setup gets assigned to
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* vb->bsize, and now we use the same calculation to get vb->size.
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*/
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vb->size = new_size;
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/* This actually (allocates and) maps buffers */
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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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/*
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* We will have to configure the IDMAC channel. It has two slots
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* for DMA buffers, we shall enter the first two buffers there,
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* and then submit new buffers in DMA-ready interrupts
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*/
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sg_init_table(sg, 1);
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sg_dma_address(sg) = videobuf_to_dma_contig(vb);
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sg_dma_len(sg) = vb->size;
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buf->txd = ichan->dma_chan.device->device_prep_slave_sg(
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&ichan->dma_chan, sg, 1, DMA_FROM_DEVICE,
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DMA_PREP_INTERRUPT);
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if (!buf->txd) {
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ret = -EIO;
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goto fail;
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}
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buf->txd->callback_param = buf->txd;
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buf->txd->callback = mx3_cam_dma_done;
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vb->state = VIDEOBUF_PREPARED;
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}
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return 0;
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fail:
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free_buffer(vq, buf);
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out:
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return ret;
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}
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static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc)
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{
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/* Add more formats as need arises and test possibilities appear... */
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switch (fourcc) {
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case V4L2_PIX_FMT_RGB565:
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return IPU_PIX_FMT_RGB565;
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case V4L2_PIX_FMT_RGB24:
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return IPU_PIX_FMT_RGB24;
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case V4L2_PIX_FMT_RGB332:
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return IPU_PIX_FMT_RGB332;
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case V4L2_PIX_FMT_YUV422P:
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return IPU_PIX_FMT_YVU422P;
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default:
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return IPU_PIX_FMT_GENERIC;
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}
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}
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/*
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* Called with .vb_lock mutex held and
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* under spinlock_irqsave(&mx3_cam->lock, ...)
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*/
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static void mx3_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 mx3_camera_dev *mx3_cam = ici->priv;
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struct mx3_camera_buffer *buf =
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container_of(vb, struct mx3_camera_buffer, vb);
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struct dma_async_tx_descriptor *txd = buf->txd;
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struct idmac_channel *ichan = to_idmac_chan(txd->chan);
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struct idmac_video_param *video = &ichan->params.video;
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dma_cookie_t cookie;
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u32 fourcc = icd->current_fmt->host_fmt->fourcc;
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BUG_ON(!irqs_disabled());
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/* This is the configuration of one sg-element */
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video->out_pixel_fmt = fourcc_to_ipu_pix(fourcc);
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video->out_width = icd->user_width;
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video->out_height = icd->user_height;
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video->out_stride = icd->user_width;
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#ifdef DEBUG
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/* helps to see what DMA actually has written */
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memset((void *)vb->baddr, 0xaa, vb->bsize);
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#endif
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list_add_tail(&vb->queue, &mx3_cam->capture);
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if (!mx3_cam->active) {
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mx3_cam->active = buf;
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vb->state = VIDEOBUF_ACTIVE;
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} else {
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vb->state = VIDEOBUF_QUEUED;
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}
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spin_unlock_irq(&mx3_cam->lock);
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cookie = txd->tx_submit(txd);
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dev_dbg(icd->dev.parent, "Submitted cookie %d DMA 0x%08x\n",
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cookie, sg_dma_address(&buf->sg));
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spin_lock_irq(&mx3_cam->lock);
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if (cookie >= 0)
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return;
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/* Submit error */
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vb->state = VIDEOBUF_PREPARED;
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list_del_init(&vb->queue);
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if (mx3_cam->active == buf)
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mx3_cam->active = NULL;
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}
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/* Called with .vb_lock held */
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static void mx3_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 mx3_camera_dev *mx3_cam = ici->priv;
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struct mx3_camera_buffer *buf =
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container_of(vb, struct mx3_camera_buffer, vb);
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unsigned long flags;
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dev_dbg(icd->dev.parent,
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"Release%s DMA 0x%08x (state %d), queue %sempty\n",
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mx3_cam->active == buf ? " active" : "", sg_dma_address(&buf->sg),
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vb->state, list_empty(&vb->queue) ? "" : "not ");
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spin_lock_irqsave(&mx3_cam->lock, flags);
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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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if (mx3_cam->active == buf)
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mx3_cam->active = NULL;
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}
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spin_unlock_irqrestore(&mx3_cam->lock, flags);
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free_buffer(vq, buf);
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}
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static struct videobuf_queue_ops mx3_videobuf_ops = {
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.buf_setup = mx3_videobuf_setup,
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.buf_prepare = mx3_videobuf_prepare,
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.buf_queue = mx3_videobuf_queue,
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.buf_release = mx3_videobuf_release,
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};
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static void mx3_camera_init_videobuf(struct videobuf_queue *q,
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struct soc_camera_device *icd)
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{
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct mx3_camera_dev *mx3_cam = ici->priv;
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videobuf_queue_dma_contig_init(q, &mx3_videobuf_ops, icd->dev.parent,
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&mx3_cam->lock,
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V4L2_BUF_TYPE_VIDEO_CAPTURE,
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V4L2_FIELD_NONE,
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sizeof(struct mx3_camera_buffer), icd,
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&icd->video_lock);
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}
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/* First part of ipu_csi_init_interface() */
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static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam,
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struct soc_camera_device *icd)
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{
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u32 conf;
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long rate;
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/* Set default size: ipu_csi_set_window_size() */
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csi_reg_write(mx3_cam, (640 - 1) | ((480 - 1) << 16), CSI_ACT_FRM_SIZE);
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/* ...and position to 0:0: ipu_csi_set_window_pos() */
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conf = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000;
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csi_reg_write(mx3_cam, conf, CSI_OUT_FRM_CTRL);
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/* We use only gated clock synchronisation mode so far */
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conf = 0 << CSI_SENS_CONF_SENS_PRTCL_SHIFT;
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|
|
|
/* Set generic data, platform-biggest bus-width */
|
|
conf |= CSI_SENS_CONF_DATA_FMT_BAYER;
|
|
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15)
|
|
conf |= 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10)
|
|
conf |= 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8)
|
|
conf |= 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
else/* if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)*/
|
|
conf |= 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_CLK_SRC)
|
|
conf |= 1 << CSI_SENS_CONF_SENS_CLKSRC_SHIFT;
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_EXT_VSYNC)
|
|
conf |= 1 << CSI_SENS_CONF_EXT_VSYNC_SHIFT;
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_DP)
|
|
conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT;
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_PCP)
|
|
conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT;
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_HSP)
|
|
conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT;
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_VSP)
|
|
conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT;
|
|
|
|
/* ipu_csi_init_interface() */
|
|
csi_reg_write(mx3_cam, conf, CSI_SENS_CONF);
|
|
|
|
clk_enable(mx3_cam->clk);
|
|
rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk);
|
|
dev_dbg(icd->dev.parent, "Set SENS_CONF to %x, rate %ld\n", conf, rate);
|
|
if (rate)
|
|
clk_set_rate(mx3_cam->clk, rate);
|
|
}
|
|
|
|
/* Called with .video_lock held */
|
|
static int mx3_camera_add_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct mx3_camera_dev *mx3_cam = ici->priv;
|
|
|
|
if (mx3_cam->icd)
|
|
return -EBUSY;
|
|
|
|
mx3_camera_activate(mx3_cam, icd);
|
|
|
|
mx3_cam->icd = icd;
|
|
|
|
dev_info(icd->dev.parent, "MX3 Camera driver attached to camera %d\n",
|
|
icd->devnum);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called with .video_lock held */
|
|
static void mx3_camera_remove_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct mx3_camera_dev *mx3_cam = ici->priv;
|
|
struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];
|
|
|
|
BUG_ON(icd != mx3_cam->icd);
|
|
|
|
if (*ichan) {
|
|
dma_release_channel(&(*ichan)->dma_chan);
|
|
*ichan = NULL;
|
|
}
|
|
|
|
clk_disable(mx3_cam->clk);
|
|
|
|
mx3_cam->icd = NULL;
|
|
|
|
dev_info(icd->dev.parent, "MX3 Camera driver detached from camera %d\n",
|
|
icd->devnum);
|
|
}
|
|
|
|
static bool channel_change_requested(struct soc_camera_device *icd,
|
|
struct v4l2_rect *rect)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct mx3_camera_dev *mx3_cam = ici->priv;
|
|
struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
|
|
|
|
/* Do buffers have to be re-allocated or channel re-configured? */
|
|
return ichan && rect->width * rect->height >
|
|
icd->user_width * icd->user_height;
|
|
}
|
|
|
|
static int test_platform_param(struct mx3_camera_dev *mx3_cam,
|
|
unsigned char buswidth, unsigned long *flags)
|
|
{
|
|
/*
|
|
* Platform specified synchronization and pixel clock polarities are
|
|
* only a recommendation and are only used during probing. MX3x
|
|
* camera interface only works in master mode, i.e., uses HSYNC and
|
|
* VSYNC signals from the sensor
|
|
*/
|
|
*flags = SOCAM_MASTER |
|
|
SOCAM_HSYNC_ACTIVE_HIGH |
|
|
SOCAM_HSYNC_ACTIVE_LOW |
|
|
SOCAM_VSYNC_ACTIVE_HIGH |
|
|
SOCAM_VSYNC_ACTIVE_LOW |
|
|
SOCAM_PCLK_SAMPLE_RISING |
|
|
SOCAM_PCLK_SAMPLE_FALLING |
|
|
SOCAM_DATA_ACTIVE_HIGH |
|
|
SOCAM_DATA_ACTIVE_LOW;
|
|
|
|
/*
|
|
* If requested data width is supported by the platform, use it or any
|
|
* possible lower value - i.MX31 is smart enough to schift bits
|
|
*/
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15)
|
|
*flags |= SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_10 |
|
|
SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4;
|
|
else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10)
|
|
*flags |= SOCAM_DATAWIDTH_10 | SOCAM_DATAWIDTH_8 |
|
|
SOCAM_DATAWIDTH_4;
|
|
else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8)
|
|
*flags |= SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4;
|
|
else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)
|
|
*flags |= SOCAM_DATAWIDTH_4;
|
|
|
|
switch (buswidth) {
|
|
case 15:
|
|
if (!(*flags & SOCAM_DATAWIDTH_15))
|
|
return -EINVAL;
|
|
break;
|
|
case 10:
|
|
if (!(*flags & SOCAM_DATAWIDTH_10))
|
|
return -EINVAL;
|
|
break;
|
|
case 8:
|
|
if (!(*flags & SOCAM_DATAWIDTH_8))
|
|
return -EINVAL;
|
|
break;
|
|
case 4:
|
|
if (!(*flags & SOCAM_DATAWIDTH_4))
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
dev_warn(mx3_cam->soc_host.v4l2_dev.dev,
|
|
"Unsupported bus width %d\n", buswidth);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mx3_camera_try_bus_param(struct soc_camera_device *icd,
|
|
const unsigned int depth)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct mx3_camera_dev *mx3_cam = ici->priv;
|
|
unsigned long bus_flags, camera_flags;
|
|
int ret = test_platform_param(mx3_cam, depth, &bus_flags);
|
|
|
|
dev_dbg(icd->dev.parent, "request bus width %d bit: %d\n", depth, ret);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
camera_flags = icd->ops->query_bus_param(icd);
|
|
|
|
ret = soc_camera_bus_param_compatible(camera_flags, bus_flags);
|
|
if (ret < 0)
|
|
dev_warn(icd->dev.parent,
|
|
"Flags incompatible: camera %lx, host %lx\n",
|
|
camera_flags, bus_flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool chan_filter(struct dma_chan *chan, void *arg)
|
|
{
|
|
struct dma_chan_request *rq = arg;
|
|
struct mx3_camera_pdata *pdata;
|
|
|
|
if (!imx_dma_is_ipu(chan))
|
|
return false;
|
|
|
|
if (!rq)
|
|
return false;
|
|
|
|
pdata = rq->mx3_cam->soc_host.v4l2_dev.dev->platform_data;
|
|
|
|
return rq->id == chan->chan_id &&
|
|
pdata->dma_dev == chan->device->dev;
|
|
}
|
|
|
|
static const struct soc_mbus_pixelfmt mx3_camera_formats[] = {
|
|
{
|
|
.fourcc = V4L2_PIX_FMT_SBGGR8,
|
|
.name = "Bayer BGGR (sRGB) 8 bit",
|
|
.bits_per_sample = 8,
|
|
.packing = SOC_MBUS_PACKING_NONE,
|
|
.order = SOC_MBUS_ORDER_LE,
|
|
}, {
|
|
.fourcc = V4L2_PIX_FMT_GREY,
|
|
.name = "Monochrome 8 bit",
|
|
.bits_per_sample = 8,
|
|
.packing = SOC_MBUS_PACKING_NONE,
|
|
.order = SOC_MBUS_ORDER_LE,
|
|
},
|
|
};
|
|
|
|
/* This will be corrected as we get more formats */
|
|
static bool mx3_camera_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 mx3_camera_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;
|
|
int formats = 0, ret;
|
|
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(icd->dev.parent,
|
|
"Invalid format code #%u: %d\n", idx, code);
|
|
return 0;
|
|
}
|
|
|
|
/* This also checks support for the requested bits-per-sample */
|
|
ret = mx3_camera_try_bus_param(icd, fmt->bits_per_sample);
|
|
if (ret < 0)
|
|
return 0;
|
|
|
|
switch (code) {
|
|
case V4L2_MBUS_FMT_SBGGR10_1X10:
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = &mx3_camera_formats[0];
|
|
xlate->code = code;
|
|
xlate++;
|
|
dev_dbg(dev, "Providing format %s using code %d\n",
|
|
mx3_camera_formats[0].name, code);
|
|
}
|
|
break;
|
|
case V4L2_MBUS_FMT_Y10_1X10:
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = &mx3_camera_formats[1];
|
|
xlate->code = code;
|
|
xlate++;
|
|
dev_dbg(dev, "Providing format %s using code %d\n",
|
|
mx3_camera_formats[1].name, code);
|
|
}
|
|
break;
|
|
default:
|
|
if (!mx3_camera_packing_supported(fmt))
|
|
return 0;
|
|
}
|
|
|
|
/* Generic pass-through */
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = fmt;
|
|
xlate->code = code;
|
|
xlate++;
|
|
dev_dbg(dev, "Providing format %x in pass-through mode\n",
|
|
xlate->host_fmt->fourcc);
|
|
}
|
|
|
|
return formats;
|
|
}
|
|
|
|
static void configure_geometry(struct mx3_camera_dev *mx3_cam,
|
|
unsigned int width, unsigned int height)
|
|
{
|
|
u32 ctrl, width_field, height_field;
|
|
|
|
/* Setup frame size - this cannot be changed on-the-fly... */
|
|
width_field = width - 1;
|
|
height_field = height - 1;
|
|
csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_SENS_FRM_SIZE);
|
|
|
|
csi_reg_write(mx3_cam, width_field << 16, CSI_FLASH_STROBE_1);
|
|
csi_reg_write(mx3_cam, (height_field << 16) | 0x22, CSI_FLASH_STROBE_2);
|
|
|
|
csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_ACT_FRM_SIZE);
|
|
|
|
/* ...and position */
|
|
ctrl = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000;
|
|
/* Sensor does the cropping */
|
|
csi_reg_write(mx3_cam, ctrl | 0 | (0 << 8), CSI_OUT_FRM_CTRL);
|
|
}
|
|
|
|
static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam)
|
|
{
|
|
dma_cap_mask_t mask;
|
|
struct dma_chan *chan;
|
|
struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];
|
|
/* We have to use IDMAC_IC_7 for Bayer / generic data */
|
|
struct dma_chan_request rq = {.mx3_cam = mx3_cam,
|
|
.id = IDMAC_IC_7};
|
|
|
|
if (*ichan) {
|
|
struct videobuf_buffer *vb, *_vb;
|
|
dma_release_channel(&(*ichan)->dma_chan);
|
|
*ichan = NULL;
|
|
mx3_cam->active = NULL;
|
|
list_for_each_entry_safe(vb, _vb, &mx3_cam->capture, queue) {
|
|
list_del_init(&vb->queue);
|
|
vb->state = VIDEOBUF_ERROR;
|
|
wake_up(&vb->done);
|
|
}
|
|
}
|
|
|
|
dma_cap_zero(mask);
|
|
dma_cap_set(DMA_SLAVE, mask);
|
|
dma_cap_set(DMA_PRIVATE, mask);
|
|
chan = dma_request_channel(mask, chan_filter, &rq);
|
|
if (!chan)
|
|
return -EBUSY;
|
|
|
|
*ichan = to_idmac_chan(chan);
|
|
(*ichan)->client = mx3_cam;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FIXME: learn to use stride != width, then we can keep stride properly aligned
|
|
* and support arbitrary (even) widths.
|
|
*/
|
|
static inline void stride_align(__u32 *width)
|
|
{
|
|
if (((*width + 7) & ~7) < 4096)
|
|
*width = (*width + 7) & ~7;
|
|
else
|
|
*width = *width & ~7;
|
|
}
|
|
|
|
/*
|
|
* As long as we don't implement host-side cropping and scaling, we can use
|
|
* default g_crop and cropcap from soc_camera.c
|
|
*/
|
|
static int mx3_camera_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 mx3_camera_dev *mx3_cam = ici->priv;
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
struct v4l2_mbus_framefmt mf;
|
|
int ret;
|
|
|
|
soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
|
|
soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
|
|
|
|
ret = v4l2_subdev_call(sd, video, s_crop, a);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* The capture device might have changed its output */
|
|
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (mf.width & 7) {
|
|
/* Ouch! We can only handle 8-byte aligned width... */
|
|
stride_align(&mf.width);
|
|
ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (mf.width != icd->user_width || mf.height != icd->user_height) {
|
|
/*
|
|
* We now know pixel formats and can decide upon DMA-channel(s)
|
|
* So far only direct camera-to-memory is supported
|
|
*/
|
|
if (channel_change_requested(icd, rect)) {
|
|
ret = acquire_dma_channel(mx3_cam);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
configure_geometry(mx3_cam, mf.width, mf.height);
|
|
}
|
|
|
|
dev_dbg(icd->dev.parent, "Sensor cropped %dx%d\n",
|
|
mf.width, mf.height);
|
|
|
|
icd->user_width = mf.width;
|
|
icd->user_height = mf.height;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mx3_camera_set_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct mx3_camera_dev *mx3_cam = ici->priv;
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
const struct soc_camera_format_xlate *xlate;
|
|
struct v4l2_pix_format *pix = &f->fmt.pix;
|
|
struct v4l2_mbus_framefmt mf;
|
|
int ret;
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
|
|
if (!xlate) {
|
|
dev_warn(icd->dev.parent, "Format %x not found\n",
|
|
pix->pixelformat);
|
|
return -EINVAL;
|
|
}
|
|
|
|
stride_align(&pix->width);
|
|
dev_dbg(icd->dev.parent, "Set format %dx%d\n", pix->width, pix->height);
|
|
|
|
ret = acquire_dma_channel(mx3_cam);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Might have to perform a complete interface initialisation like in
|
|
* ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider
|
|
* mxc_v4l2_s_fmt()
|
|
*/
|
|
|
|
configure_geometry(mx3_cam, pix->width, pix->height);
|
|
|
|
mf.width = pix->width;
|
|
mf.height = pix->height;
|
|
mf.field = pix->field;
|
|
mf.colorspace = pix->colorspace;
|
|
mf.code = xlate->code;
|
|
|
|
ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (mf.code != xlate->code)
|
|
return -EINVAL;
|
|
|
|
pix->width = mf.width;
|
|
pix->height = mf.height;
|
|
pix->field = mf.field;
|
|
pix->colorspace = mf.colorspace;
|
|
icd->current_fmt = xlate;
|
|
|
|
dev_dbg(icd->dev.parent, "Sensor set %dx%d\n", pix->width, pix->height);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mx3_camera_try_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
|
|
const struct soc_camera_format_xlate *xlate;
|
|
struct v4l2_pix_format *pix = &f->fmt.pix;
|
|
struct v4l2_mbus_framefmt mf;
|
|
__u32 pixfmt = pix->pixelformat;
|
|
int ret;
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (pixfmt && !xlate) {
|
|
dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* limit to MX3 hardware capabilities */
|
|
if (pix->height > 4096)
|
|
pix->height = 4096;
|
|
if (pix->width > 4096)
|
|
pix->width = 4096;
|
|
|
|
pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
|
|
xlate->host_fmt);
|
|
if (pix->bytesperline < 0)
|
|
return pix->bytesperline;
|
|
pix->sizeimage = pix->height * pix->bytesperline;
|
|
|
|
/* limit to sensor capabilities */
|
|
mf.width = pix->width;
|
|
mf.height = pix->height;
|
|
mf.field = pix->field;
|
|
mf.colorspace = pix->colorspace;
|
|
mf.code = xlate->code;
|
|
|
|
ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pix->width = mf.width;
|
|
pix->height = mf.height;
|
|
pix->colorspace = mf.colorspace;
|
|
|
|
switch (mf.field) {
|
|
case V4L2_FIELD_ANY:
|
|
pix->field = V4L2_FIELD_NONE;
|
|
break;
|
|
case V4L2_FIELD_NONE:
|
|
break;
|
|
default:
|
|
dev_err(icd->dev.parent, "Field type %d unsupported.\n",
|
|
mf.field);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mx3_camera_reqbufs(struct soc_camera_device *icd,
|
|
struct v4l2_requestbuffers *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int mx3_camera_poll(struct file *file, poll_table *pt)
|
|
{
|
|
struct soc_camera_device *icd = file->private_data;
|
|
|
|
return videobuf_poll_stream(file, &icd->vb_vidq, pt);
|
|
}
|
|
|
|
static int mx3_camera_querycap(struct soc_camera_host *ici,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
/* cap->name is set by the firendly caller:-> */
|
|
strlcpy(cap->card, "i.MX3x Camera", sizeof(cap->card));
|
|
cap->version = KERNEL_VERSION(0, 2, 2);
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mx3_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct mx3_camera_dev *mx3_cam = ici->priv;
|
|
unsigned long bus_flags, camera_flags, common_flags;
|
|
u32 dw, sens_conf;
|
|
const struct soc_mbus_pixelfmt *fmt;
|
|
int buswidth;
|
|
int ret;
|
|
const struct soc_camera_format_xlate *xlate;
|
|
struct device *dev = icd->dev.parent;
|
|
|
|
fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code);
|
|
if (!fmt)
|
|
return -EINVAL;
|
|
|
|
buswidth = fmt->bits_per_sample;
|
|
ret = test_platform_param(mx3_cam, buswidth, &bus_flags);
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(dev, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev_dbg(dev, "requested bus width %d bit: %d\n", buswidth, ret);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
camera_flags = icd->ops->query_bus_param(icd);
|
|
|
|
common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags);
|
|
dev_dbg(dev, "Flags cam: 0x%lx host: 0x%lx common: 0x%lx\n",
|
|
camera_flags, bus_flags, common_flags);
|
|
if (!common_flags) {
|
|
dev_dbg(dev, "no common flags");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Make choices, based on platform preferences */
|
|
if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
|
|
(common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_HSP)
|
|
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 (mx3_cam->platform_flags & MX3_CAMERA_VSP)
|
|
common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
|
|
else
|
|
common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
|
|
}
|
|
|
|
if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) &&
|
|
(common_flags & SOCAM_DATA_ACTIVE_LOW)) {
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_DP)
|
|
common_flags &= ~SOCAM_DATA_ACTIVE_HIGH;
|
|
else
|
|
common_flags &= ~SOCAM_DATA_ACTIVE_LOW;
|
|
}
|
|
|
|
if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
|
|
(common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
|
|
if (mx3_cam->platform_flags & MX3_CAMERA_PCP)
|
|
common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
|
|
else
|
|
common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
|
|
}
|
|
|
|
/*
|
|
* Make the camera work in widest common mode, we'll take care of
|
|
* the rest
|
|
*/
|
|
if (common_flags & SOCAM_DATAWIDTH_15)
|
|
common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
|
|
SOCAM_DATAWIDTH_15;
|
|
else if (common_flags & SOCAM_DATAWIDTH_10)
|
|
common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
|
|
SOCAM_DATAWIDTH_10;
|
|
else if (common_flags & SOCAM_DATAWIDTH_8)
|
|
common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
|
|
SOCAM_DATAWIDTH_8;
|
|
else
|
|
common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
|
|
SOCAM_DATAWIDTH_4;
|
|
|
|
ret = icd->ops->set_bus_param(icd, common_flags);
|
|
if (ret < 0) {
|
|
dev_dbg(dev, "camera set_bus_param(%lx) returned %d\n",
|
|
common_flags, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* So far only gated clock mode is supported. Add a line
|
|
* (3 << CSI_SENS_CONF_SENS_PRTCL_SHIFT) |
|
|
* below and select the required mode when supporting other
|
|
* synchronisation protocols.
|
|
*/
|
|
sens_conf = csi_reg_read(mx3_cam, CSI_SENS_CONF) &
|
|
~((1 << CSI_SENS_CONF_VSYNC_POL_SHIFT) |
|
|
(1 << CSI_SENS_CONF_HSYNC_POL_SHIFT) |
|
|
(1 << CSI_SENS_CONF_DATA_POL_SHIFT) |
|
|
(1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT) |
|
|
(3 << CSI_SENS_CONF_DATA_FMT_SHIFT) |
|
|
(3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT));
|
|
|
|
/* TODO: Support RGB and YUV formats */
|
|
|
|
/* This has been set in mx3_camera_activate(), but we clear it above */
|
|
sens_conf |= CSI_SENS_CONF_DATA_FMT_BAYER;
|
|
|
|
if (common_flags & SOCAM_PCLK_SAMPLE_FALLING)
|
|
sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT;
|
|
if (common_flags & SOCAM_HSYNC_ACTIVE_LOW)
|
|
sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT;
|
|
if (common_flags & SOCAM_VSYNC_ACTIVE_LOW)
|
|
sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT;
|
|
if (common_flags & SOCAM_DATA_ACTIVE_LOW)
|
|
sens_conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT;
|
|
|
|
/* Just do what we're asked to do */
|
|
switch (xlate->host_fmt->bits_per_sample) {
|
|
case 4:
|
|
dw = 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
break;
|
|
case 8:
|
|
dw = 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
break;
|
|
case 10:
|
|
dw = 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
break;
|
|
default:
|
|
/*
|
|
* Actually it can only be 15 now, default is just to silence
|
|
* compiler warnings
|
|
*/
|
|
case 15:
|
|
dw = 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
|
|
}
|
|
|
|
csi_reg_write(mx3_cam, sens_conf | dw, CSI_SENS_CONF);
|
|
|
|
dev_dbg(dev, "Set SENS_CONF to %x\n", sens_conf | dw);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct soc_camera_host_ops mx3_soc_camera_host_ops = {
|
|
.owner = THIS_MODULE,
|
|
.add = mx3_camera_add_device,
|
|
.remove = mx3_camera_remove_device,
|
|
.set_crop = mx3_camera_set_crop,
|
|
.set_fmt = mx3_camera_set_fmt,
|
|
.try_fmt = mx3_camera_try_fmt,
|
|
.get_formats = mx3_camera_get_formats,
|
|
.init_videobuf = mx3_camera_init_videobuf,
|
|
.reqbufs = mx3_camera_reqbufs,
|
|
.poll = mx3_camera_poll,
|
|
.querycap = mx3_camera_querycap,
|
|
.set_bus_param = mx3_camera_set_bus_param,
|
|
};
|
|
|
|
static int __devinit mx3_camera_probe(struct platform_device *pdev)
|
|
{
|
|
struct mx3_camera_dev *mx3_cam;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
int err = 0;
|
|
struct soc_camera_host *soc_host;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
err = -ENODEV;
|
|
goto egetres;
|
|
}
|
|
|
|
mx3_cam = vzalloc(sizeof(*mx3_cam));
|
|
if (!mx3_cam) {
|
|
dev_err(&pdev->dev, "Could not allocate mx3 camera object\n");
|
|
err = -ENOMEM;
|
|
goto ealloc;
|
|
}
|
|
|
|
mx3_cam->clk = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(mx3_cam->clk)) {
|
|
err = PTR_ERR(mx3_cam->clk);
|
|
goto eclkget;
|
|
}
|
|
|
|
mx3_cam->pdata = pdev->dev.platform_data;
|
|
mx3_cam->platform_flags = mx3_cam->pdata->flags;
|
|
if (!(mx3_cam->platform_flags & (MX3_CAMERA_DATAWIDTH_4 |
|
|
MX3_CAMERA_DATAWIDTH_8 | MX3_CAMERA_DATAWIDTH_10 |
|
|
MX3_CAMERA_DATAWIDTH_15))) {
|
|
/*
|
|
* 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 8 bit\n");
|
|
mx3_cam->platform_flags |= MX3_CAMERA_DATAWIDTH_8;
|
|
}
|
|
|
|
mx3_cam->mclk = mx3_cam->pdata->mclk_10khz * 10000;
|
|
if (!mx3_cam->mclk) {
|
|
dev_warn(&pdev->dev,
|
|
"mclk_10khz == 0! Please, fix your platform data. "
|
|
"Using default 20MHz\n");
|
|
mx3_cam->mclk = 20000000;
|
|
}
|
|
|
|
/* list of video-buffers */
|
|
INIT_LIST_HEAD(&mx3_cam->capture);
|
|
spin_lock_init(&mx3_cam->lock);
|
|
|
|
base = ioremap(res->start, resource_size(res));
|
|
if (!base) {
|
|
pr_err("Couldn't map %x@%x\n", resource_size(res), res->start);
|
|
err = -ENOMEM;
|
|
goto eioremap;
|
|
}
|
|
|
|
mx3_cam->base = base;
|
|
|
|
soc_host = &mx3_cam->soc_host;
|
|
soc_host->drv_name = MX3_CAM_DRV_NAME;
|
|
soc_host->ops = &mx3_soc_camera_host_ops;
|
|
soc_host->priv = mx3_cam;
|
|
soc_host->v4l2_dev.dev = &pdev->dev;
|
|
soc_host->nr = pdev->id;
|
|
|
|
err = soc_camera_host_register(soc_host);
|
|
if (err)
|
|
goto ecamhostreg;
|
|
|
|
/* IDMAC interface */
|
|
dmaengine_get();
|
|
|
|
return 0;
|
|
|
|
ecamhostreg:
|
|
iounmap(base);
|
|
eioremap:
|
|
clk_put(mx3_cam->clk);
|
|
eclkget:
|
|
vfree(mx3_cam);
|
|
ealloc:
|
|
egetres:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit mx3_camera_remove(struct platform_device *pdev)
|
|
{
|
|
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
|
|
struct mx3_camera_dev *mx3_cam = container_of(soc_host,
|
|
struct mx3_camera_dev, soc_host);
|
|
|
|
clk_put(mx3_cam->clk);
|
|
|
|
soc_camera_host_unregister(soc_host);
|
|
|
|
iounmap(mx3_cam->base);
|
|
|
|
/*
|
|
* The channel has either not been allocated,
|
|
* or should have been released
|
|
*/
|
|
if (WARN_ON(mx3_cam->idmac_channel[0]))
|
|
dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan);
|
|
|
|
vfree(mx3_cam);
|
|
|
|
dmaengine_put();
|
|
|
|
dev_info(&pdev->dev, "i.MX3x Camera driver unloaded\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver mx3_camera_driver = {
|
|
.driver = {
|
|
.name = MX3_CAM_DRV_NAME,
|
|
},
|
|
.probe = mx3_camera_probe,
|
|
.remove = __devexit_p(mx3_camera_remove),
|
|
};
|
|
|
|
|
|
static int __init mx3_camera_init(void)
|
|
{
|
|
return platform_driver_register(&mx3_camera_driver);
|
|
}
|
|
|
|
static void __exit mx3_camera_exit(void)
|
|
{
|
|
platform_driver_unregister(&mx3_camera_driver);
|
|
}
|
|
|
|
module_init(mx3_camera_init);
|
|
module_exit(mx3_camera_exit);
|
|
|
|
MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver");
|
|
MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME);
|