ARM: AT91SAM9G45: add crypto peripherals

Signed-off-by: Nicolas Royer <nicolas@eukrea.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Eric Bénard <eric@eukrea.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

4 files changed, 164 insertions, 1 deletions

diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index 4792682d52b9..da6dc0f29657 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -182,6 +182,13 @@ static struct clk adc_op_clk = {
         .rate_hz        = 13200000,
 };
 
+/* AES/TDES/SHA clock - Only for sam9m11/sam9g56 */
+static struct clk aestdessha_clk = {
+        .name           = "aestdessha_clk",
+        .pmc_mask       = 1 << AT91SAM9G45_ID_AESTDESSHA,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+
 static struct clk *periph_clocks[] __initdata = {
         &pioA_clk,
         &pioB_clk,
@@ -211,6 +218,7 @@ static struct clk *periph_clocks[] __initdata = {
         &udphs_clk,
         &mmc1_clk,
         &adc_op_clk,
+        &aestdessha_clk,
         // irq0
 };
 
@@ -231,6 +239,9 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
         CLKDEV_CON_DEV_ID(NULL, "atmel-trng", &trng_clk),
+        CLKDEV_CON_DEV_ID(NULL, "atmel_sha", &aestdessha_clk),
+        CLKDEV_CON_DEV_ID(NULL, "atmel_tdes", &aestdessha_clk),
+        CLKDEV_CON_DEV_ID(NULL, "atmel_aes", &aestdessha_clk),
         /* more usart lookup table for DT entries */
         CLKDEV_CON_DEV_ID("usart", "ffffee00.serial", &mck),
         CLKDEV_CON_DEV_ID("usart", "fff8c000.serial", &usart0_clk),
@@ -387,7 +398,7 @@ static unsigned int at91sam9g45_default_irq_priority[NR_AIC_IRQS] __initdata = {
         3,      /* Ethernet */
         0,      /* Image Sensor Interface */
         2,      /* USB Device High speed port */
-        0,
+        0,      /* AESTDESSHA Crypto HW Accelerators */
         0,      /* Multimedia Card Interface 1 */
         0,
         0,      /* Advanced Interrupt Controller (IRQ0) */
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 933fc9afe7d0..7102f62b64ef 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -18,6 +18,7 @@
 #include <linux/platform_device.h>
 #include <linux/i2c-gpio.h>
 #include <linux/atmel-mci.h>
+#include <linux/platform_data/atmel-aes.h>
 
 #include <linux/platform_data/at91_adc.h>
 
@@ -1830,6 +1831,130 @@ void __init at91_register_uart(unsigned id, unsigned portnr, unsigned pins) {}
 void __init at91_add_device_serial(void) {}
 #endif
 
+/* --------------------------------------------------------------------
+ *  SHA1/SHA256
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_CRYPTO_DEV_ATMEL_SHA) || defined(CONFIG_CRYPTO_DEV_ATMEL_SHA_MODULE)
+static struct resource sha_resources[] = {
+        {
+                .start  = AT91SAM9G45_BASE_SHA,
+                .end    = AT91SAM9G45_BASE_SHA + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9G45_ID_AESTDESSHA,
+                .end    = AT91SAM9G45_ID_AESTDESSHA,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91sam9g45_sha_device = {
+        .name   = "atmel_sha",
+        .id             = -1,
+        .resource       = sha_resources,
+        .num_resources  = ARRAY_SIZE(sha_resources),
+};
+
+static void __init at91_add_device_sha(void)
+{
+        platform_device_register(&at91sam9g45_sha_device);
+}
+#else
+static void __init at91_add_device_sha(void) {}
+#endif
+
+/* --------------------------------------------------------------------
+ *  DES/TDES
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_CRYPTO_DEV_ATMEL_TDES) || defined(CONFIG_CRYPTO_DEV_ATMEL_TDES_MODULE)
+static struct resource tdes_resources[] = {
+        [0] = {
+                .start  = AT91SAM9G45_BASE_TDES,
+                .end    = AT91SAM9G45_BASE_TDES + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9G45_ID_AESTDESSHA,
+                .end    = AT91SAM9G45_ID_AESTDESSHA,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91sam9g45_tdes_device = {
+        .name   = "atmel_tdes",
+        .id             = -1,
+        .resource       = tdes_resources,
+        .num_resources  = ARRAY_SIZE(tdes_resources),
+};
+
+static void __init at91_add_device_tdes(void)
+{
+        platform_device_register(&at91sam9g45_tdes_device);
+}
+#else
+static void __init at91_add_device_tdes(void) {}
+#endif
+
+/* --------------------------------------------------------------------
+ *  AES
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_CRYPTO_DEV_ATMEL_AES) || defined(CONFIG_CRYPTO_DEV_ATMEL_AES_MODULE)
+static struct aes_platform_data aes_data;
+static u64 aes_dmamask = DMA_BIT_MASK(32);
+
+static struct resource aes_resources[] = {
+        [0] = {
+                .start  = AT91SAM9G45_BASE_AES,
+                .end    = AT91SAM9G45_BASE_AES + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9G45_ID_AESTDESSHA,
+                .end    = AT91SAM9G45_ID_AESTDESSHA,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91sam9g45_aes_device = {
+        .name   = "atmel_aes",
+        .id             = -1,
+        .dev    = {
+                .dma_mask               = &aes_dmamask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+                .platform_data          = &aes_data,
+        },
+        .resource       = aes_resources,
+        .num_resources  = ARRAY_SIZE(aes_resources),
+};
+
+static void __init at91_add_device_aes(void)
+{
+        struct at_dma_slave     *atslave;
+        struct aes_dma_data     *alt_atslave;
+
+        alt_atslave = kzalloc(sizeof(struct aes_dma_data), GFP_KERNEL);
+
+        /* DMA TX slave channel configuration */
+        atslave = &alt_atslave->txdata;
+        atslave->dma_dev = &at_hdmac_device.dev;
+        atslave->cfg = ATC_FIFOCFG_ENOUGHSPACE  | ATC_SRC_H2SEL_HW |
+                                                ATC_SRC_PER(AT_DMA_ID_AES_RX);
+
+        /* DMA RX slave channel configuration */
+        atslave = &alt_atslave->rxdata;
+        atslave->dma_dev = &at_hdmac_device.dev;
+        atslave->cfg = ATC_FIFOCFG_ENOUGHSPACE  | ATC_DST_H2SEL_HW |
+                                                ATC_DST_PER(AT_DMA_ID_AES_TX);
+
+        aes_data.dma_slave = alt_atslave;
+        platform_device_register(&at91sam9g45_aes_device);
+}
+#else
+static void __init at91_add_device_aes(void) {}
+#endif
 
 /* -------------------------------------------------------------------- */
 /*
@@ -1847,6 +1972,9 @@ static int __init at91_add_standard_devices(void)
         at91_add_device_trng();
         at91_add_device_watchdog();
         at91_add_device_tc();
+        at91_add_device_sha();
+        at91_add_device_tdes();
+        at91_add_device_aes();
         return 0;
 }
 
diff --git a/arch/arm/mach-at91/include/mach/at91sam9g45.h b/arch/arm/mach-at91/include/mach/at91sam9g45.h
index 3a4da24d5911..8eba1021f533 100644
--- a/arch/arm/mach-at91/include/mach/at91sam9g45.h
+++ b/arch/arm/mach-at91/include/mach/at91sam9g45.h
@@ -136,6 +136,8 @@
 #define AT_DMA_ID_SSC1_RX        8
 #define AT_DMA_ID_AC97_TX        9
 #define AT_DMA_ID_AC97_RX       10
+#define AT_DMA_ID_AES_TX        11
+#define AT_DMA_ID_AES_RX        12
 #define AT_DMA_ID_MCI1          13
 
 #endif
diff --git a/include/linux/platform_data/atmel-aes.h b/include/linux/platform_data/atmel-aes.h
new file mode 100644
index 000000000000..e7a1949bad26
--- /dev/null
+++ b/include/linux/platform_data/atmel-aes.h
@@ -0,0 +1,22 @@
+#ifndef __LINUX_ATMEL_AES_H
+#define __LINUX_ATMEL_AES_H
+
+#include <mach/at_hdmac.h>
+
+/**
+ * struct aes_dma_data - DMA data for AES
+ */
+struct aes_dma_data {
+        struct at_dma_slave     txdata;
+        struct at_dma_slave     rxdata;
+};
+
+/**
+ * struct aes_platform_data - board-specific AES configuration
+ * @dma_slave: DMA slave interface to use in data transfers.
+ */
+struct aes_platform_data {
+        struct aes_dma_data     *dma_slave;
+};
+
+#endif /* __LINUX_ATMEL_AES_H */