From bc69d124d8141dff942c8c7fbaae76f9c0f4c796 Mon Sep 17 00:00:00 2001 From: "Mark A. Greer" Date: Tue, 8 Jan 2013 11:57:44 -0700 Subject: crypto: omap-aes - Add Device Tree Support 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 Signed-off-by: Mark A. Greer Signed-off-by: Herbert Xu --- drivers/crypto/omap-aes.c | 123 ++++++++++++++++++++++++++++++++++++---------- 1 file changed, 97 insertions(+), 26 deletions(-) (limited to 'drivers/crypto/omap-aes.c') diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index faf522ff82d7..dfebd4025654 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -25,6 +25,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -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, }, }; -- cgit v1.2.3