[PATCH 1/5] ARM: AT91SAM9G45: add crypto peripherals

Eric Bénard
2012-07-01T17:20:42Z

arch/arm/mach-at91/at91sam9g45.c | 13 +++-
arch/arm/mach-at91/at91sam9g45_devices.c | 128 +++++++++++++++++++++++++
arch/arm/mach-at91/include/mach/at91sam9g45.h | 2 +
include/linux/platform_data/atmel-aes.h | 22 ++++
4 files changed, 164 insertions(+), 1 deletions(-)
create mode 100644 include/linux/platform_data/atmel-aes.h

diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index 4792682..da6dc0f 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 933fc9a..7102f62 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 3a4da24..8eba102 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 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 */
--
1.7.7.6