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Commit e1d1144e authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

fbdev: sh_mobile_meram: Request memory regions for memory resources 



Make sure the registers and MERAM spaces are reserved before using them.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
parent e71504d5

drivers/video/sh_mobile_meram.c

+37 −16
Original line number Diff line number Diff line
@@ -596,13 +596,12 @@ static struct sh_mobile_meram_ops sh_mobile_meram_ops = { 
 * initialize MERAM

 */



static int sh_mobile_meram_remove(struct platform_device *pdev);



static int __devinit sh_mobile_meram_probe(struct platform_device *pdev)

{

	struct sh_mobile_meram_priv *priv;

	struct sh_mobile_meram_info *pdata = pdev->dev.platform_data;

	struct resource *res;

	struct resource *regs;

	struct resource *meram;

	int error;



	if (!pdata) {
@@ -610,8 +609,9 @@ static int __devinit sh_mobile_meram_probe(struct platform_device *pdev) 
		return -EINVAL;

	}



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res) {

	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	meram = platform_get_resource(pdev, IORESOURCE_MEM, 1);

	if (regs == NULL || meram == NULL) {

		dev_err(&pdev->dev, "cannot get platform resources\n");

		return -ENOENT;

	}
@@ -622,32 +622,50 @@ static int __devinit sh_mobile_meram_probe(struct platform_device *pdev) 
		return -ENOMEM;

	}



	platform_set_drvdata(pdev, priv);



	/* initialize private data */

	mutex_init(&priv->lock);

	priv->base = ioremap_nocache(res->start, resource_size(res));

	pdata->ops = &sh_mobile_meram_ops;

	pdata->priv = priv;

	pdata->pdev = pdev;



	if (!request_mem_region(regs->start, resource_size(regs), pdev->name)) {

		dev_err(&pdev->dev, "MERAM registers region already claimed\n");

		error = -EBUSY;

		goto err_req_regs;

	}



	if (!request_mem_region(meram->start, resource_size(meram),

				pdev->name)) {

		dev_err(&pdev->dev, "MERAM memory region already claimed\n");

		error = -EBUSY;

		goto err_req_meram;

	}



	priv->base = ioremap_nocache(regs->start, resource_size(regs));

	if (!priv->base) {

		dev_err(&pdev->dev, "ioremap failed\n");

		error = -EFAULT;

		goto err;

		goto err_ioremap;

	}

	pdata->ops = &sh_mobile_meram_ops;

	pdata->priv = priv;

	pdata->pdev = pdev;



	/* initialize ICB addressing mode */

	if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1)

		meram_write_reg(priv->base, MEVCR1, MEVCR1_AMD1);



	platform_set_drvdata(pdev, priv);

	pm_runtime_enable(&pdev->dev);



	dev_info(&pdev->dev, "sh_mobile_meram initialized.");



	return 0;



err:

	sh_mobile_meram_remove(pdev);

err_ioremap:

	release_mem_region(meram->start, resource_size(meram));

err_req_meram:

	release_mem_region(regs->start, resource_size(regs));

err_req_regs:

	mutex_destroy(&priv->lock);

	kfree(priv);



	return error;

}
@@ -656,11 +674,14 @@ static int __devinit sh_mobile_meram_probe(struct platform_device *pdev) 
static int sh_mobile_meram_remove(struct platform_device *pdev)

{

	struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);

	struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	struct resource *meram = platform_get_resource(pdev, IORESOURCE_MEM, 1);



	pm_runtime_disable(&pdev->dev);



	if (priv->base)

	iounmap(priv->base);

	release_mem_region(meram->start, resource_size(meram));

	release_mem_region(regs->start, resource_size(regs));



	mutex_destroy(&priv->lock);