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k66f: add RNG HAL implementation

pull/2765/head
Martin Kojtal 2016-09-16 13:25:27 +01:00
parent 7d68492bef
commit 02fd613a81
2 changed files with 24 additions and 27 deletions
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2
hal/targets.json
View File

@ -603,7 +603,7 @@
"inherits": ["Target"], "inherits": ["Target"],
"progen": {"target": "frdm-k66f"}, "progen": {"target": "frdm-k66f"},
"detect_code": ["0311"], "detect_code": ["0311"],
"device_has": ["ANALOGIN", "ANALOGOUT", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"], "device_has": ["ANALOGIN", "ANALOGOUT", "ERROR_RED", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES", "RNG"],
"release_versions": ["2", "5"] "release_versions": ["2", "5"]
}, },
"NUCLEO_F030R8": { "NUCLEO_F030R8": {

49
hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/entropy_hardware_poll.c → hal/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K66F/rng_api.c
View File

@ -26,12 +26,25 @@
#include "cmsis.h" #include "cmsis.h"
#include "fsl_common.h" #include "fsl_common.h"
#include "fsl_clock.h" #include "fsl_clock.h"
#include "rng_api.h"
void rng_init(rng_t *obj)
{
CLOCK_EnableClock(kCLOCK_Rnga0);
CLOCK_DisableClock(kCLOCK_Rnga0);
CLOCK_EnableClock(kCLOCK_Rnga0);
}
void rng_free(rng_t *obj)
{
CLOCK_DisableClock(kCLOCK_Rnga0);
}
/* /*
* Get one byte of entropy from the RNG, assuming it is up and running. * Get one byte of entropy from the RNG, assuming it is up and running.
* As recommended (34.1.1), get only one bit of each output. * As recommended (34.1.1), get only one bit of each output.
*/ */
static void rng_get_byte( unsigned char *byte ) static void rng_get_byte(unsigned char *byte)
{ {
size_t bit; size_t bit;
@ -43,41 +56,25 @@ static void rng_get_byte( unsigned char *byte )
} }
} }
/* int rng_get_numbers(rng_t *obj, uint8_t *output, size_t length, size_t *output_length)
* Get len bytes of entropy from the hardware RNG.
*/
int mbedtls_hardware_poll( void *data,
unsigned char *output, size_t len, size_t *olen )
{ {
size_t i; size_t i;
int ret; int ret;
((void) data);
CLOCK_EnableClock( kCLOCK_Rnga0 );
CLOCK_DisableClock( kCLOCK_Rnga0 );
CLOCK_EnableClock( kCLOCK_Rnga0 );
/* Set "Interrupt Mask", "High Assurance" and "Go", /* Set "Interrupt Mask", "High Assurance" and "Go",
* unset "Clear interrupt" and "Sleep" */ * unset "Clear interrupt" and "Sleep" */
RNG->CR = RNG_CR_INTM_MASK | RNG_CR_HA_MASK | RNG_CR_GO_MASK; RNG->CR = RNG_CR_INTM_MASK | RNG_CR_HA_MASK | RNG_CR_GO_MASK;
for( i = 0; i < len; i++ ) for (i = 0; i < length; i++) {
rng_get_byte( output + i ); rng_get_byte(output + i);
/* Just be extra sure that we didn't do it wrong */
if( ( RNG->SR & RNG_SR_SECV_MASK ) != 0 )
{
ret = -1;
goto cleanup;
} }
*olen = len; /* Just be extra sure that we didn't do it wrong */
ret = 0; if ((RNG->SR & RNG_SR_SECV_MASK) != 0) {
return -1;
}
cleanup: *output_length = length;
/* Disable clock to save power - assume we're the only users of RNG */
CLOCK_DisableClock( kCLOCK_Rnga0 );
return( ret ); return 0;
} }