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-rw-r--r--Documentation/devicetree/bindings/crypto/samsung-sss.txt15
-rw-r--r--drivers/crypto/s5p-sss.c107
2 files changed, 95 insertions, 27 deletions
diff --git a/Documentation/devicetree/bindings/crypto/samsung-sss.txt b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
index f6e09a6231f4..a6dafa83c6df 100644
--- a/Documentation/devicetree/bindings/crypto/samsung-sss.txt
+++ b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
@@ -8,16 +8,25 @@ The SSS module in S5PV210 SoC supports the following:
-- SHA-1/SHA-256/MD5/HMAC (SHA-1/SHA-256/MD5)/PRNG
-- PRNG: Pseudo Random Number Generator
+The SSS module in Exynos4 (Exynos4210) and
+Exynos5 (Exynos5420 and Exynos5250) SoCs
+supports the following also:
+-- ARCFOUR (ARC4)
+-- True Random Number Generator (TRNG)
+-- Secure Key Manager
+
Required properties:
- compatible : Should contain entries for this and backward compatible
SSS versions:
- "samsung,s5pv210-secss" for S5PV210 SoC.
+ - "samsung,exynos4210-secss" for Exynos4210, Exynos4212, Exynos4412, Exynos5250,
+ Exynos5260 and Exynos5420 SoCs.
- reg : Offset and length of the register set for the module
- interrupts : interrupt specifiers of SSS module interrupts, should contain
- two entries:
- - first : feed control interrupt,
- - second : hash interrupt.
+ following entries:
+ - first : feed control interrupt (required for all variants),
+ - second : hash interrupt (required only for samsung,s5pv210-secss).
- clocks : list of clock phandle and specifier pairs for all clocks listed in
clock-names property.
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index c6aafe84e06a..37e0598a8cba 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -106,7 +106,7 @@
#define SSS_REG_FCPKDMAO 0x005C
/* AES registers */
-#define SSS_REG_AES_CONTROL 0x4000
+#define SSS_REG_AES_CONTROL 0x00
#define SSS_AES_BYTESWAP_DI _BIT(11)
#define SSS_AES_BYTESWAP_DO _BIT(10)
#define SSS_AES_BYTESWAP_IV _BIT(9)
@@ -122,21 +122,25 @@
#define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02)
#define SSS_AES_MODE_DECRYPT _BIT(0)
-#define SSS_REG_AES_STATUS 0x4004
+#define SSS_REG_AES_STATUS 0x04
#define SSS_AES_BUSY _BIT(2)
#define SSS_AES_INPUT_READY _BIT(1)
#define SSS_AES_OUTPUT_READY _BIT(0)
-#define SSS_REG_AES_IN_DATA(s) (0x4010 + (s << 2))
-#define SSS_REG_AES_OUT_DATA(s) (0x4020 + (s << 2))
-#define SSS_REG_AES_IV_DATA(s) (0x4030 + (s << 2))
-#define SSS_REG_AES_CNT_DATA(s) (0x4040 + (s << 2))
-#define SSS_REG_AES_KEY_DATA(s) (0x4080 + (s << 2))
+#define SSS_REG_AES_IN_DATA(s) (0x10 + (s << 2))
+#define SSS_REG_AES_OUT_DATA(s) (0x20 + (s << 2))
+#define SSS_REG_AES_IV_DATA(s) (0x30 + (s << 2))
+#define SSS_REG_AES_CNT_DATA(s) (0x40 + (s << 2))
+#define SSS_REG_AES_KEY_DATA(s) (0x80 + (s << 2))
#define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg))
#define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg))
#define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg))
+#define SSS_AES_REG(dev, reg) ((dev)->aes_ioaddr + SSS_REG_##reg)
+#define SSS_AES_WRITE(dev, reg, val) __raw_writel((val), \
+ SSS_AES_REG(dev, reg))
+
/* HW engine modes */
#define FLAGS_AES_DECRYPT _BIT(0)
#define FLAGS_AES_MODE_MASK _SBF(1, 0x03)
@@ -146,6 +150,20 @@
#define AES_KEY_LEN 16
#define CRYPTO_QUEUE_LEN 1
+/**
+ * struct samsung_aes_variant - platform specific SSS driver data
+ * @has_hash_irq: true if SSS module uses hash interrupt, false otherwise
+ * @aes_offset: AES register offset from SSS module's base.
+ *
+ * Specifies platform specific configuration of SSS module.
+ * Note: A structure for driver specific platform data is used for future
+ * expansion of its usage.
+ */
+struct samsung_aes_variant {
+ bool has_hash_irq;
+ unsigned int aes_offset;
+};
+
struct s5p_aes_reqctx {
unsigned long mode;
};
@@ -162,6 +180,7 @@ struct s5p_aes_dev {
struct device *dev;
struct clk *clk;
void __iomem *ioaddr;
+ void __iomem *aes_ioaddr;
int irq_hash;
int irq_fc;
@@ -174,16 +193,48 @@ struct s5p_aes_dev {
struct crypto_queue queue;
bool busy;
spinlock_t lock;
+
+ struct samsung_aes_variant *variant;
};
static struct s5p_aes_dev *s5p_dev;
+static const struct samsung_aes_variant s5p_aes_data = {
+ .has_hash_irq = true,
+ .aes_offset = 0x4000,
+};
+
+static const struct samsung_aes_variant exynos_aes_data = {
+ .has_hash_irq = false,
+ .aes_offset = 0x200,
+};
+
static const struct of_device_id s5p_sss_dt_match[] = {
- { .compatible = "samsung,s5pv210-secss" },
+ {
+ .compatible = "samsung,s5pv210-secss",
+ .data = &s5p_aes_data,
+ },
+ {
+ .compatible = "samsung,exynos4210-secss",
+ .data = &exynos_aes_data,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, s5p_sss_dt_match);
+static inline struct samsung_aes_variant *find_s5p_sss_version
+ (struct platform_device *pdev)
+{
+ if (IS_ENABLED(CONFIG_OF) && (pdev->dev.of_node)) {
+ const struct of_device_id *match;
+ match = of_match_node(s5p_sss_dt_match,
+ pdev->dev.of_node);
+ return (struct samsung_aes_variant *)match->data;
+ }
+ return (struct samsung_aes_variant *)
+ platform_get_device_id(pdev)->driver_data;
+}
+
static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
{
SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg));
@@ -329,14 +380,14 @@ static void s5p_set_aes(struct s5p_aes_dev *dev,
{
void __iomem *keystart;
- memcpy(dev->ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10);
+ memcpy(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10);
if (keylen == AES_KEYSIZE_256)
- keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(0);
+ keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0);
else if (keylen == AES_KEYSIZE_192)
- keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(2);
+ keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(2);
else
- keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(4);
+ keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(4);
memcpy(keystart, key, keylen);
}
@@ -386,7 +437,7 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
if (err)
goto outdata_error;
- SSS_WRITE(dev, AES_CONTROL, aes_control);
+ SSS_AES_WRITE(dev, AES_CONTROL, aes_control);
s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen);
s5p_set_dma_indata(dev, req->src);
@@ -571,6 +622,7 @@ static int s5p_aes_probe(struct platform_device *pdev)
struct s5p_aes_dev *pdata;
struct device *dev = &pdev->dev;
struct resource *res;
+ struct samsung_aes_variant *variant;
if (s5p_dev)
return -EEXIST;
@@ -584,6 +636,8 @@ static int s5p_aes_probe(struct platform_device *pdev)
if (IS_ERR(pdata->ioaddr))
return PTR_ERR(pdata->ioaddr);
+ variant = find_s5p_sss_version(pdev);
+
pdata->clk = devm_clk_get(dev, "secss");
if (IS_ERR(pdata->clk)) {
dev_err(dev, "failed to find secss clock source\n");
@@ -594,6 +648,8 @@ static int s5p_aes_probe(struct platform_device *pdev)
spin_lock_init(&pdata->lock);
+ pdata->aes_ioaddr = pdata->ioaddr + variant->aes_offset;
+
pdata->irq_fc = platform_get_irq(pdev, 0);
if (pdata->irq_fc < 0) {
err = pdata->irq_fc;
@@ -607,19 +663,22 @@ static int s5p_aes_probe(struct platform_device *pdev)
goto err_irq;
}
- pdata->irq_hash = platform_get_irq(pdev, 1);
- if (pdata->irq_hash < 0) {
- err = pdata->irq_hash;
- dev_warn(dev, "hash interrupt is not available.\n");
- goto err_irq;
- }
- err = devm_request_irq(dev, pdata->irq_hash, s5p_aes_interrupt,
- IRQF_SHARED, pdev->name, pdev);
- if (err < 0) {
- dev_warn(dev, "hash interrupt is not available.\n");
- goto err_irq;
+ if (variant->has_hash_irq) {
+ pdata->irq_hash = platform_get_irq(pdev, 1);
+ if (pdata->irq_hash < 0) {
+ err = pdata->irq_hash;
+ dev_warn(dev, "hash interrupt is not available.\n");
+ goto err_irq;
+ }
+ err = devm_request_irq(dev, pdata->irq_hash, s5p_aes_interrupt,
+ IRQF_SHARED, pdev->name, pdev);
+ if (err < 0) {
+ dev_warn(dev, "hash interrupt is not available.\n");
+ goto err_irq;
+ }
}
+ pdata->variant = variant;
pdata->dev = dev;
platform_set_drvdata(pdev, pdata);
s5p_dev = pdata;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 01:50:05 +0000