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: Mark A. Greer <mgreer@animalcreek.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Mark A. Greer
Herbert Xu
parent
dd49a69e8e
commit
03feec9cc6
1 changed files with 107 additions and 34 deletions
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@ -30,6 +30,10 @@
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#include <linux/dmaengine.h>
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#include <linux/omap-dma.h>
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#include <linux/pm_runtime.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/delay.h>
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#include <linux/crypto.h>
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#include <linux/cryptohash.h>
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@ -145,6 +149,7 @@ struct omap_sham_dev {
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int irq;
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spinlock_t lock;
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int err;
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unsigned int dma;
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struct dma_chan *dma_lch;
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struct tasklet_struct done_task;
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@ -1155,13 +1160,99 @@ static irqreturn_t omap_sham_irq(int irq, void *dev_id)
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return IRQ_HANDLED;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id omap_sham_of_match[] = {
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{
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.compatible = "ti,omap2-sham",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, omap_sham_of_match);
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static int omap_sham_get_res_of(struct omap_sham_dev *dd,
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struct device *dev, struct resource *res)
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{
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struct device_node *node = dev->of_node;
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const struct of_device_id *match;
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int err = 0;
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match = of_match_device(of_match_ptr(omap_sham_of_match), dev);
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if (!match) {
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dev_err(dev, "no compatible OF match\n");
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err = -EINVAL;
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goto err;
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}
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err = of_address_to_resource(node, 0, res);
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if (err < 0) {
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dev_err(dev, "can't translate OF node address\n");
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err = -EINVAL;
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goto err;
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}
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dd->irq = of_irq_to_resource(node, 0, NULL);
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if (!dd->irq) {
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dev_err(dev, "can't translate OF irq value\n");
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err = -EINVAL;
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goto err;
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}
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dd->dma = -1; /* Dummy value that's unused */
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err:
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return err;
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}
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#else
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static int omap_sham_get_res_dev(struct omap_sham_dev *dd,
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struct device *dev, struct resource *res)
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{
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return -EINVAL;
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}
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#endif
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static int omap_sham_get_res_pdev(struct omap_sham_dev *dd,
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struct platform_device *pdev, struct resource *res)
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{
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struct device *dev = &pdev->dev;
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struct resource *r;
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int err = 0;
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/* Get the base address */
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!r) {
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dev_err(dev, "no MEM resource info\n");
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err = -ENODEV;
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goto err;
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}
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memcpy(res, r, sizeof(*res));
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/* Get the IRQ */
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dd->irq = platform_get_irq(pdev, 0);
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if (dd->irq < 0) {
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dev_err(dev, "no IRQ resource info\n");
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err = dd->irq;
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goto err;
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}
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/* Get the DMA */
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r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!r) {
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dev_err(dev, "no DMA resource info\n");
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err = -ENODEV;
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goto err;
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}
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dd->dma = r->start;
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err:
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return err;
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}
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static int __devinit omap_sham_probe(struct platform_device *pdev)
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{
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struct omap_sham_dev *dd;
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct resource res;
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dma_cap_mask_t mask;
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unsigned dma_chan;
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int err, i, j;
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dd = kzalloc(sizeof(struct omap_sham_dev), GFP_KERNEL);
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@ -1178,33 +1269,18 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
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tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd);
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crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH);
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dd->irq = -1;
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err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) :
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omap_sham_get_res_pdev(dd, pdev, &res);
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if (err)
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goto res_err;
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/* Get the base address */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(dev, "no MEM resource info\n");
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err = -ENODEV;
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goto res_err;
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}
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dd->phys_base = res->start;
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/* Get the DMA */
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res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!res) {
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dev_err(dev, "no DMA resource info\n");
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err = -ENODEV;
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goto res_err;
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}
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dma_chan = res->start;
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/* Get the IRQ */
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dd->irq = platform_get_irq(pdev, 0);
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if (dd->irq < 0) {
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dev_err(dev, "no IRQ resource info\n");
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err = dd->irq;
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dd->io_base = devm_request_and_ioremap(dev, &res);
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if (!dd->io_base) {
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dev_err(dev, "can't ioremap\n");
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err = -ENOMEM;
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goto res_err;
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}
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dd->phys_base = res.start;
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err = request_irq(dd->irq, omap_sham_irq,
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IRQF_TRIGGER_LOW, dev_name(dev), dd);
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@ -1216,10 +1292,10 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
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dma_cap_zero(mask);
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dma_cap_set(DMA_SLAVE, mask);
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dd->dma_lch = dma_request_channel(mask, omap_dma_filter_fn, &dma_chan);
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dd->dma_lch = dma_request_channel(mask, omap_dma_filter_fn, &dd->dma);
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if (!dd->dma_lch) {
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dev_err(dev, "unable to obtain RX DMA engine channel %u\n",
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dma_chan);
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dd->dma);
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err = -ENXIO;
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goto dma_err;
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}
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@ -1255,13 +1331,11 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
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err_algs:
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for (j = 0; j < i; j++)
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crypto_unregister_ahash(&algs[j]);
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iounmap(dd->io_base);
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pm_runtime_disable(dev);
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io_err:
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dma_release_channel(dd->dma_lch);
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dma_err:
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if (dd->irq >= 0)
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free_irq(dd->irq, dd);
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free_irq(dd->irq, dd);
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res_err:
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kfree(dd);
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dd = NULL;
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@ -1285,11 +1359,9 @@ static int __devexit omap_sham_remove(struct platform_device *pdev)
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for (i = 0; i < ARRAY_SIZE(algs); i++)
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crypto_unregister_ahash(&algs[i]);
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tasklet_kill(&dd->done_task);
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iounmap(dd->io_base);
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pm_runtime_disable(&pdev->dev);
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dma_release_channel(dd->dma_lch);
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if (dd->irq >= 0)
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free_irq(dd->irq, dd);
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free_irq(dd->irq, dd);
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kfree(dd);
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dd = NULL;
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@ -1321,6 +1393,7 @@ static struct platform_driver omap_sham_driver = {
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.name = "omap-sham",
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.owner = THIS_MODULE,
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.pm = &omap_sham_pm_ops,
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.of_match_table = omap_sham_of_match,
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},
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};
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