static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct imx_pcm_dma_params *dma_params;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	int ret;

	dma_params = snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);

	iprtd->dma = imx_dma_request_by_prio(DRV_NAME, DMA_PRIO_HIGH);
	if (iprtd->dma < 0) {
		pr_err("Failed to claim the audio DMA\n");
		return -ENODEV;
	}

	ret = imx_dma_setup_handlers(iprtd->dma,
				imx_ssi_dma_callback,
				snd_imx_dma_err_callback, substream);
	if (ret)
		goto out;

	ret = imx_dma_setup_progression_handler(iprtd->dma,
			imx_ssi_dma_progression);
	if (ret) {
		pr_err("Failed to setup the DMA handler\n");
		goto out;
	}

	ret = imx_dma_config_channel(iprtd->dma,
			IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
			IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
			dma_params->dma, 1);
	if (ret < 0) {
		pr_err("Cannot configure DMA channel: %d\n", ret);
		goto out;
	}

	imx_dma_config_burstlen(iprtd->dma, dma_params->burstsize * 2);

	return 0;
out:
	imx_dma_free(iprtd->dma);
	return ret;
}
Beispiel #2
0
static int __devinit mx27_camera_dma_init(struct platform_device *pdev,
		struct mx2_camera_dev *pcdev)
{
	int err;

	pcdev->dma = imx_dma_request_by_prio("CSI RX DMA", DMA_PRIO_HIGH);
	if (pcdev->dma < 0) {
		dev_err(&pdev->dev, "%s failed to request DMA channel\n",
				__func__);
		return pcdev->dma;
	}

	err = imx_dma_setup_handlers(pcdev->dma, mx27_camera_dma_callback,
					mx27_camera_dma_err_callback, pcdev);
	if (err) {
		dev_err(&pdev->dev, "%s failed to set DMA callback\n",
				__func__);
		goto err_out;
	}

	err = imx_dma_config_channel(pcdev->dma,
			IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_FIFO,
			IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
			DMA_REQ_CSI_RX, 1);
	if (err) {
		dev_err(&pdev->dev, "%s failed to config DMA channel\n",
				__func__);
		goto err_out;
	}

	imx_dma_config_burstlen(pcdev->dma, 64);

	return 0;

err_out:
	imx_dma_free(pcdev->dma);

	return err;
}
Beispiel #3
0
static int __init mx1_camera_probe(struct platform_device *pdev)
{
	struct mx1_camera_dev *pcdev;
	struct resource *res;
	struct pt_regs regs;
	struct clk *clk;
	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 || (int)irq <= 0) {
		err = -ENODEV;
		goto exit;
	}

	clk = clk_get(&pdev->dev, "csi_clk");
	if (IS_ERR(clk)) {
		err = PTR_ERR(clk);
		goto exit;
	}

	pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
	if (!pcdev) {
		dev_err(&pdev->dev, "Could not allocate pcdev\n");
		err = -ENOMEM;
		goto exit_put_clk;
	}

	pcdev->res = res;
	pcdev->clk = clk;

	pcdev->pdata = pdev->dev.platform_data;

	if (pcdev->pdata)
		pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;

	if (!pcdev->mclk) {
		dev_warn(&pdev->dev,
			 "mclk_10khz == 0! Please, fix your platform data. "
			 "Using default 20MHz\n");
		pcdev->mclk = 20000000;
	}

	INIT_LIST_HEAD(&pcdev->capture);
	spin_lock_init(&pcdev->lock);

	/*
	 * Request the regions.
	 */
	if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) {
		err = -EBUSY;
		goto exit_kfree;
	}

	base = ioremap(res->start, resource_size(res));
	if (!base) {
		err = -ENOMEM;
		goto exit_release;
	}
	pcdev->irq = irq;
	pcdev->base = base;

	/* request dma */
	pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH);
	if (pcdev->dma_chan < 0) {
		dev_err(&pdev->dev, "Can't request DMA for MX1 CSI\n");
		err = -EBUSY;
		goto exit_iounmap;
	}
	dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chan);

	imx_dma_setup_handlers(pcdev->dma_chan, mx1_camera_dma_irq, NULL,
			       pcdev);

	imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO,
			       IMX_DMA_MEMSIZE_32, MX1_DMA_REQ_CSI_R, 0);
	/* burst length : 16 words = 64 bytes */
	imx_dma_config_burstlen(pcdev->dma_chan, 0);

	/* request irq */
	err = claim_fiq(&fh);
	if (err) {
		dev_err(&pdev->dev, "Camera interrupt register failed\n");
		goto exit_free_dma;
	}

	set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end -
						   &mx1_camera_sof_fiq_start);

	regs.ARM_r8 = (long)MX1_DMA_DIMR;
	regs.ARM_r9 = (long)MX1_DMA_CCR(pcdev->dma_chan);
	regs.ARM_r10 = (long)pcdev->base + CSICR1;
	regs.ARM_fp = (long)pcdev->base + CSISR;
	regs.ARM_sp = 1 << pcdev->dma_chan;
	set_fiq_regs(&regs);

	mxc_set_irq_fiq(irq, 1);
	enable_fiq(irq);

	pcdev->soc_host.drv_name	= DRIVER_NAME;
	pcdev->soc_host.ops		= &mx1_soc_camera_host_ops;
	pcdev->soc_host.priv		= pcdev;
	pcdev->soc_host.v4l2_dev.dev	= &pdev->dev;
	pcdev->soc_host.nr		= pdev->id;
	err = soc_camera_host_register(&pcdev->soc_host);
	if (err)
		goto exit_free_irq;

	dev_info(&pdev->dev, "MX1 Camera driver loaded\n");

	return 0;

exit_free_irq:
	disable_fiq(irq);
	mxc_set_irq_fiq(irq, 0);
	release_fiq(&fh);
exit_free_dma:
	imx_dma_free(pcdev->dma_chan);
exit_iounmap:
	iounmap(base);
exit_release:
	release_mem_region(res->start, resource_size(res));
exit_kfree:
	kfree(pcdev);
exit_put_clk:
	clk_put(clk);
exit:
	return err;
}