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ARM: AT91SAM9G45: add crypto peripherals
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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>
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Nicolas Royer authored and Herbert Xu committed Jul 11, 2012
1 parent 6c79294 commit 815e972
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Showing 4 changed files with 164 additions and 1 deletion.
13 changes: 12 additions & 1 deletion arch/arm/mach-at91/at91sam9g45.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down Expand Up @@ -211,6 +218,7 @@ static struct clk *periph_clocks[] __initdata = {
&udphs_clk,
&mmc1_clk,
&adc_op_clk,
&aestdessha_clk,
// irq0
};

Expand All @@ -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),
Expand Down Expand Up @@ -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) */
Expand Down
128 changes: 128 additions & 0 deletions arch/arm/mach-at91/at91sam9g45_devices.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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>

Expand Down Expand Up @@ -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

/* -------------------------------------------------------------------- */
/*
Expand All @@ -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;
}

Expand Down
2 changes: 2 additions & 0 deletions arch/arm/mach-at91/include/mach/at91sam9g45.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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
22 changes: 22 additions & 0 deletions include/linux/platform_data/atmel-aes.h
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Original file line number Diff line number Diff line change
@@ -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 */

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