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#include <sys/types.h>
#include <lib_AT91SAM7.h>
#include <AT91SAM7.h>
#include <dfu/dbgu.h>
#include <board.h>
#define EFCS_CMD_WRITE_PAGE 0x1
#define EFCS_CMD_SET_LOCK_BIT 0x2
#define EFCS_CMD_WRITE_PAGE_LOCK 0x3
#define EFCS_CMD_CLEAR_LOCK 0x4
#define EFCS_CMD_ERASE_ALL 0x8
#define EFCS_CMD_SET_NVM_BIT 0xb
#define EFCS_CMD_CLEAR_NVM_BIT 0xd
#define EFCS_CMD_SET_SECURITY_BIT 0xf
static u_int16_t page_from_ramaddr(const void *addr)
{
u_int32_t ramaddr = (u_int32_t) addr;
ramaddr -= (u_int32_t) AT91C_IFLASH;
return ((ramaddr >> AT91C_IFLASH_PAGE_SHIFT));
}
#define PAGES_PER_LOCKREGION (AT91C_IFLASH_LOCK_REGION_SIZE>>AT91C_IFLASH_PAGE_SHIFT)
#define IS_FIRST_PAGE_OF_LOCKREGION(x) ((x % PAGES_PER_LOCKREGION) == 0)
#define LOCKREGION_FROM_PAGE(x) (x / PAGES_PER_LOCKREGION)
static int is_page_locked(u_int16_t page)
{
u_int16_t lockregion = LOCKREGION_FROM_PAGE(page);
return (AT91C_BASE_MC->MC_FSR & (lockregion << 16));
}
static void unlock_page(u_int16_t page)
{
page &= 0x3ff;
AT91F_MC_EFC_PerformCmd(AT91C_BASE_MC, AT91C_MC_FCMD_UNLOCK |
AT91C_MC_CORRECT_KEY | (page << 8));
}
void flash_page(u_int8_t *addr)
{
u_int16_t page = page_from_ramaddr(addr) & 0x3ff;
u_int32_t fsr = AT91F_MC_EFC_GetStatus(AT91C_BASE_MC);
DEBUGP("flash_page(0x%x=%u) ", addr, page);
if (is_page_locked(page)) {
DEBUGP("unlocking ");
unlock_page(page);
}
if (!(fsr & AT91C_MC_FRDY)) {
DEBUGP("NOT_FLASHING ");
return;
}
DEBUGP("performing start_prog ");
AT91F_MC_EFC_PerformCmd(AT91C_BASE_MC, AT91C_MC_FCMD_START_PROG |
AT91C_MC_CORRECT_KEY | (page << 8));
}
void flash_init(void)
{
unsigned int fmcn = AT91F_MC_EFC_ComputeFMCN(MCK);
AT91F_MC_EFC_CfgModeReg(AT91C_BASE_MC, (fmcn&0xff) << 16 |
AT91C_MC_FWS_3FWS);
}
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