提交 03feec9c 编写于 作者: M Mark A. Greer 提交者: Herbert Xu

crypto: omap-sham - Add Device Tree Support

Add Device Tree suport to the omap-sham 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: NMark A. Greer <mgreer@animalcreek.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
上级 dd49a69e
......@@ -30,6 +30,10 @@
#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/of_irq.h>
#include <linux/delay.h>
#include <linux/crypto.h>
#include <linux/cryptohash.h>
......@@ -145,6 +149,7 @@ struct omap_sham_dev {
int irq;
spinlock_t lock;
int err;
unsigned int dma;
struct dma_chan *dma_lch;
struct tasklet_struct done_task;
......@@ -1155,13 +1160,99 @@ static irqreturn_t omap_sham_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
#ifdef CONFIG_OF
static const struct of_device_id omap_sham_of_match[] = {
{
.compatible = "ti,omap2-sham",
},
{},
};
MODULE_DEVICE_TABLE(of, omap_sham_of_match);
static int omap_sham_get_res_of(struct omap_sham_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_sham_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->irq = of_irq_to_resource(node, 0, NULL);
if (!dd->irq) {
dev_err(dev, "can't translate OF irq value\n");
err = -EINVAL;
goto err;
}
dd->dma = -1; /* Dummy value that's unused */
err:
return err;
}
#else
static int omap_sham_get_res_dev(struct omap_sham_dev *dd,
struct device *dev, struct resource *res)
{
return -EINVAL;
}
#endif
static int omap_sham_get_res_pdev(struct omap_sham_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 IRQ */
dd->irq = platform_get_irq(pdev, 0);
if (dd->irq < 0) {
dev_err(dev, "no IRQ resource info\n");
err = dd->irq;
goto err;
}
/* Get the DMA */
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!r) {
dev_err(dev, "no DMA resource info\n");
err = -ENODEV;
goto err;
}
dd->dma = r->start;
err:
return err;
}
static int __devinit omap_sham_probe(struct platform_device *pdev)
{
struct omap_sham_dev *dd;
struct device *dev = &pdev->dev;
struct resource *res;
struct resource res;
dma_cap_mask_t mask;
unsigned dma_chan;
int err, i, j;
dd = kzalloc(sizeof(struct omap_sham_dev), GFP_KERNEL);
......@@ -1178,33 +1269,18 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
dd->irq = -1;
/* Get the base address */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "no MEM resource info\n");
err = -ENODEV;
goto res_err;
}
dd->phys_base = res->start;
/* Get the DMA */
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!res) {
dev_err(dev, "no DMA resource info\n");
err = -ENODEV;
err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
omap_sham_get_res_pdev(dd, pdev, &res);
if (err)
goto res_err;
}
dma_chan = res->start;
/* Get the IRQ */
dd->irq = platform_get_irq(pdev, 0);
if (dd->irq < 0) {
dev_err(dev, "no IRQ resource info\n");
err = dd->irq;
dd->io_base = devm_request_and_ioremap(dev, &res);
if (!dd->io_base) {
dev_err(dev, "can't ioremap\n");
err = -ENOMEM;
goto res_err;
}
dd->phys_base = res.start;
err = request_irq(dd->irq, omap_sham_irq,
IRQF_TRIGGER_LOW, dev_name(dev), dd);
......@@ -1216,10 +1292,10 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dd->dma_lch = dma_request_channel(mask, omap_dma_filter_fn, &dma_chan);
dd->dma_lch = dma_request_channel(mask, omap_dma_filter_fn, &dd->dma);
if (!dd->dma_lch) {
dev_err(dev, "unable to obtain RX DMA engine channel %u\n",
dma_chan);
dd->dma);
err = -ENXIO;
goto dma_err;
}
......@@ -1255,13 +1331,11 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
err_algs:
for (j = 0; j < i; j++)
crypto_unregister_ahash(&algs[j]);
iounmap(dd->io_base);
pm_runtime_disable(dev);
io_err:
dma_release_channel(dd->dma_lch);
dma_err:
if (dd->irq >= 0)
free_irq(dd->irq, dd);
free_irq(dd->irq, dd);
res_err:
kfree(dd);
dd = NULL;
......@@ -1285,11 +1359,9 @@ static int __devexit omap_sham_remove(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(algs); i++)
crypto_unregister_ahash(&algs[i]);
tasklet_kill(&dd->done_task);
iounmap(dd->io_base);
pm_runtime_disable(&pdev->dev);
dma_release_channel(dd->dma_lch);
if (dd->irq >= 0)
free_irq(dd->irq, dd);
free_irq(dd->irq, dd);
kfree(dd);
dd = NULL;
......@@ -1321,6 +1393,7 @@ static struct platform_driver omap_sham_driver = {
.name = "omap-sham",
.owner = THIS_MODULE,
.pm = &omap_sham_pm_ops,
.of_match_table = omap_sham_of_match,
},
};
......
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