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>

diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index 4792682..da6dc0f 100644 (file)
--- 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 933fc9a..7102f62 100644 (file)
--- 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 3a4da24..8eba102 100644 (file)
--- 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 (file)
index 0000000..e7a1949
--- /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 */