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crypto: omap-aes - Add Device Tree Support

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Add Device Tree suport to the omap-aes crypto
driver.  Currently, only support for OMAP2 and
OMAP3 is being added but support for OMAP4 will
be added in a subsequent patch.

CC: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Mark A. Greer 2013-01-08 11:57:44 -07:00 committed by Herbert Xu
parent 44f04c1d6f
commit bc69d124d8
1 changed files with 96 additions and 25 deletions
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121
drivers/crypto/omap-aes.c
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@ -25,6 +25,9 @@
#include <linux/dmaengine.h>
#include <linux/omap-dma.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/io.h>
#include <linux/crypto.h>
#include <linux/interrupt.h>
@ -819,11 +822,97 @@ static struct crypto_alg algs[] = {
}
};
#ifdef CONFIG_OF
static const struct of_device_id omap_aes_of_match[] = {
{
.compatible = "ti,omap2-aes",
},
{},
};
MODULE_DEVICE_TABLE(of, omap_aes_of_match);
static int omap_aes_get_res_of(struct omap_aes_dev *dd,
struct device *dev, struct resource *res)
{
struct device_node *node = dev->of_node;
const struct of_device_id *match;
int err = 0;
match = of_match_device(of_match_ptr(omap_aes_of_match), dev);
if (!match) {
dev_err(dev, "no compatible OF match\n");
err = -EINVAL;
goto err;
}
err = of_address_to_resource(node, 0, res);
if (err < 0) {
dev_err(dev, "can't translate OF node address\n");
err = -EINVAL;
goto err;
}
dd->dma_out = -1; /* Dummy value that's unused */
dd->dma_in = -1; /* Dummy value that's unused */
err:
return err;
}
#else
static const struct of_device_id omap_aes_of_match[] = {
{},
};
static int omap_aes_get_res_of(struct omap_aes_dev *dd,
struct device *dev, struct resource *res)
{
return -EINVAL;
}
#endif
static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
struct platform_device *pdev, struct resource *res)
{
struct device *dev = &pdev->dev;
struct resource *r;
int err = 0;
/* Get the base address */
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
dev_err(dev, "no MEM resource info\n");
err = -ENODEV;
goto err;
}
memcpy(res, r, sizeof(*res));
/* Get the DMA out channel */
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!r) {
dev_err(dev, "no DMA out resource info\n");
err = -ENODEV;
goto err;
}
dd->dma_out = r->start;
/* Get the DMA in channel */
r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!r) {
dev_err(dev, "no DMA in resource info\n");
err = -ENODEV;
goto err;
}
dd->dma_in = r->start;
err:
return err;
}
static int omap_aes_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct omap_aes_dev *dd;
struct resource *res;
struct resource res;
int err = -ENOMEM, i, j;
u32 reg;
@ -838,35 +927,18 @@ static int omap_aes_probe(struct platform_device *pdev)
spin_lock_init(&dd->lock);
crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH);
/* Get the base address */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "invalid resource type\n");
err = -ENODEV;
err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) :
omap_aes_get_res_pdev(dd, pdev, &res);
if (err)
goto err_res;
}
dd->phys_base = res->start;
/* Get the DMA */
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res)
dev_info(dev, "no DMA info\n");
else
dd->dma_out = res->start;
/* Get the DMA */
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!res)
dev_info(dev, "no DMA info\n");
else
dd->dma_in = res->start;
dd->io_base = ioremap(dd->phys_base, SZ_4K);
dd->io_base = devm_request_and_ioremap(dev, &res);
if (!dd->io_base) {
dev_err(dev, "can't ioremap\n");
err = -ENOMEM;
goto err_res;
}
dd->phys_base = res.start;
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
@ -904,7 +976,6 @@ err_algs:
err_dma:
tasklet_kill(&dd->done_task);
tasklet_kill(&dd->queue_task);
iounmap(dd->io_base);
pm_runtime_disable(dev);
err_res:
kfree(dd);
@ -932,7 +1003,6 @@ static int omap_aes_remove(struct platform_device *pdev)
tasklet_kill(&dd->done_task);
tasklet_kill(&dd->queue_task);
omap_aes_dma_cleanup(dd);
iounmap(dd->io_base);
pm_runtime_disable(dd->dev);
kfree(dd);
dd = NULL;
@ -965,6 +1035,7 @@ static struct platform_driver omap_aes_driver = {
.name = "omap-aes",
.owner = THIS_MODULE,
.pm = &omap_aes_pm_ops,
.of_match_table = omap_aes_of_match,
},
};