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crypto: s5p - add AES support for Exynos5433 

Add AES crypto HW acceleration for Exynos5433, with the help of SlimSSS IP.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kamil Konieczny 2019-02-22 13:21:44 +01:00 committed by Herbert Xu
parent d3ff9f851b
commit 0918f18c71
1 changed files with 46 additions and 4 deletions
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50
drivers/crypto/s5p-sss.c
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@ -232,6 +232,7 @@
* struct samsung_aes_variant - platform specific SSS driver data
* @aes_offset: AES register offset from SSS module's base.
* @hash_offset: HASH register offset from SSS module's base.
* @clk_names: names of clocks needed to run SSS IP
*
* Specifies platform specific configuration of SSS module.
* Note: A structure for driver specific platform data is used for future
@ -240,6 +241,7 @@
struct samsung_aes_variant {
unsigned int aes_offset;
unsigned int hash_offset;
const char *clk_names[];
};
struct s5p_aes_reqctx {
@ -296,6 +298,7 @@ struct s5p_aes_ctx {
struct s5p_aes_dev {
struct device *dev;
struct clk *clk;
struct clk *pclk;
void __iomem *ioaddr;
void __iomem *aes_ioaddr;
int irq_fc;
@ -384,11 +387,19 @@ struct s5p_hash_ctx {
static const struct samsung_aes_variant s5p_aes_data = {
.aes_offset = 0x4000,
.hash_offset = 0x6000,
.clk_names = { "secss", },
};
static const struct samsung_aes_variant exynos_aes_data = {
.aes_offset = 0x200,
.hash_offset = 0x400,
.clk_names = { "secss", },
};
static const struct samsung_aes_variant exynos5433_slim_aes_data = {
.aes_offset = 0x400,
.hash_offset = 0x800,
.clk_names = { "pclk", "aclk", },
};
static const struct of_device_id s5p_sss_dt_match[] = {
@ -400,6 +411,10 @@ static const struct of_device_id s5p_sss_dt_match[] = {
.compatible = "samsung,exynos4210-secss",
.data = &exynos_aes_data,
},
{
.compatible = "samsung,exynos5433-slim-sss",
.data = &exynos5433_slim_aes_data,
},
{ },
};
MODULE_DEVICE_TABLE(of, s5p_sss_dt_match);
@ -2218,18 +2233,39 @@ static int s5p_aes_probe(struct platform_device *pdev)
return PTR_ERR(pdata->ioaddr);
}
pdata->clk = devm_clk_get(dev, "secss");
pdata->clk = devm_clk_get(dev, variant->clk_names[0]);
if (IS_ERR(pdata->clk)) {
dev_err(dev, "failed to find secss clock source\n");
dev_err(dev, "failed to find secss clock %s\n",
variant->clk_names[0]);
return -ENOENT;
}
err = clk_prepare_enable(pdata->clk);
if (err < 0) {
dev_err(dev, "Enabling SSS clk failed, err %d\n", err);
dev_err(dev, "Enabling clock %s failed, err %d\n",
variant->clk_names[0], err);
return err;
}
if (variant->clk_names[1]) {
pdata->pclk = devm_clk_get(dev, variant->clk_names[1]);
if (IS_ERR(pdata->pclk)) {
dev_err(dev, "failed to find clock %s\n",
variant->clk_names[1]);
err = -ENOENT;
goto err_clk;
}
err = clk_prepare_enable(pdata->pclk);
if (err < 0) {
dev_err(dev, "Enabling clock %s failed, err %d\n",
variant->clk_names[0], err);
goto err_clk;
}
} else {
pdata->pclk = NULL;
}
spin_lock_init(&pdata->lock);
spin_lock_init(&pdata->hash_lock);
@ -2305,8 +2341,11 @@ err_algs:
tasklet_kill(&pdata->tasklet);
err_irq:
clk_disable_unprepare(pdata->clk);
if (pdata->pclk)
clk_disable_unprepare(pdata->pclk);
err_clk:
clk_disable_unprepare(pdata->clk);
s5p_dev = NULL;
return err;
@ -2333,6 +2372,9 @@ static int s5p_aes_remove(struct platform_device *pdev)
pdata->use_hash = false;
}
if (pdata->pclk)
clk_disable_unprepare(pdata->pclk);
clk_disable_unprepare(pdata->clk);
s5p_dev = NULL;