diff options
Diffstat (limited to 'board/ppmc7xx/flash.c')
-rw-r--r-- | board/ppmc7xx/flash.c | 494 |
1 files changed, 494 insertions, 0 deletions
diff --git a/board/ppmc7xx/flash.c b/board/ppmc7xx/flash.c new file mode 100644 index 00000000000..4be6f136443 --- /dev/null +++ b/board/ppmc7xx/flash.c @@ -0,0 +1,494 @@ +/* + * flash.c + * ------- + * + * Flash programming routines for the Wind River PPMC 74xx/7xx + * based on flash.c from the TQM8260 board. + * + * By Richard Danter (richard.danter@windriver.com) + * Copyright (C) 2005 Wind River Systems + */ + +#include <common.h> +#include <asm/processor.h> +#include <74xx_7xx.h> + +#define DWORD unsigned long long + +/* Local function prototypes */ +static int write_dword (flash_info_t* info, ulong dest, unsigned char *pdata); +static void write_via_fpu (volatile DWORD* addr, DWORD* data); + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + +/*----------------------------------------------------------------------- + */ +void flash_reset (void) +{ + unsigned long msr; + DWORD cmd_reset = 0x00F000F000F000F0LL; + + if (flash_info[0].flash_id != FLASH_UNKNOWN) { + msr = get_msr (); + set_msr (msr | MSR_FP); + + write_via_fpu ((DWORD*)flash_info[0].start[0], &cmd_reset ); + + set_msr (msr); + } +} + +/*----------------------------------------------------------------------- + */ +ulong flash_get_size (ulong baseaddr, flash_info_t * info) +{ + int i; + unsigned long msr; + DWORD flashtest; + DWORD cmd_select[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL, + 0x0090009000900090LL }; + + /* Enable FPU */ + msr = get_msr (); + set_msr (msr | MSR_FP); + + /* Write auto-select command sequence */ + write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[0] ); + write_via_fpu ((DWORD*)(baseaddr + (0x02AA << 3)), &cmd_select[1] ); + write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[2] ); + + /* Restore FPU */ + set_msr (msr); + + /* Read manufacturer ID */ + flashtest = *(volatile DWORD*)baseaddr; + switch ((int)flashtest) { + case AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + case FUJ_MANUFACT: + info->flash_id = FLASH_MAN_FUJ; + break; + default: + /* No, faulty or unknown flash */ + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); + } + + /* Read device ID */ + flashtest = *(volatile DWORD*)(baseaddr + 8); + switch ((long)flashtest) { + case AMD_ID_LV800T: + info->flash_id += FLASH_AM800T; + info->sector_count = 19; + info->size = 0x00400000; + break; + case AMD_ID_LV800B: + info->flash_id += FLASH_AM800B; + info->sector_count = 19; + info->size = 0x00400000; + break; + case AMD_ID_LV160T: + info->flash_id += FLASH_AM160T; + info->sector_count = 35; + info->size = 0x00800000; + break; + case AMD_ID_LV160B: + info->flash_id += FLASH_AM160B; + info->sector_count = 35; + info->size = 0x00800000; + break; + case AMD_ID_DL322T: + info->flash_id += FLASH_AMDL322T; + info->sector_count = 71; + info->size = 0x01000000; + break; + case AMD_ID_DL322B: + info->flash_id += FLASH_AMDL322B; + info->sector_count = 71; + info->size = 0x01000000; + break; + case AMD_ID_DL323T: + info->flash_id += FLASH_AMDL323T; + info->sector_count = 71; + info->size = 0x01000000; + break; + case AMD_ID_DL323B: + info->flash_id += FLASH_AMDL323B; + info->sector_count = 71; + info->size = 0x01000000; + break; + case AMD_ID_LV640U: + info->flash_id += FLASH_AM640U; + info->sector_count = 128; + info->size = 0x02000000; + break; + default: + /* Unknown flash type */ + info->flash_id = FLASH_UNKNOWN; + return (0); + } + + if ((long)flashtest == AMD_ID_LV640U) { + /* set up sector start adress table (uniform sector type) */ + for (i = 0; i < info->sector_count; i++) + info->start[i] = baseaddr + (i * 0x00040000); + } else if (info->flash_id & FLASH_BTYPE) { + /* set up sector start adress table (bottom sector type) */ + info->start[0] = baseaddr + 0x00000000; + info->start[1] = baseaddr + 0x00010000; + info->start[2] = baseaddr + 0x00018000; + info->start[3] = baseaddr + 0x00020000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000; + } + } else { + /* set up sector start adress table (top sector type) */ + i = info->sector_count - 1; + info->start[i--] = baseaddr + info->size - 0x00010000; + info->start[i--] = baseaddr + info->size - 0x00018000; + info->start[i--] = baseaddr + info->size - 0x00020000; + for (; i >= 0; i--) { + info->start[i] = baseaddr + i * 0x00040000; + } + } + + /* check for protected sectors */ + for (i = 0; i < info->sector_count; i++) { + /* read sector protection at sector address, (A7 .. A0) = 0x02 */ + if (*(volatile DWORD*)(info->start[i] + 16) & 0x0001000100010001LL) { + info->protect[i] = 1; /* D0 = 1 if protected */ + } else { + info->protect[i] = 0; + } + } + + flash_reset (); + return (info->size); +} + +/*----------------------------------------------------------------------- + */ +unsigned long flash_init (void) +{ + unsigned long size_b0 = 0; + int i; + + /* Init: no FLASHes known */ + for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* Static FLASH Bank configuration here (only one bank) */ + size_b0 = flash_get_size (CFG_FLASH_BASE, &flash_info[0]); + if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) { + printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", + size_b0, size_b0 >> 20); + } + + /* + * protect monitor and environment sectors + */ +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + flash_protect (FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]); +#endif + +#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif + flash_protect (FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); +#endif + + return (size_b0); +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t * info) +{ + int i; + + if (info->flash_id == FLASH_UNKNOWN) { + printf ("missing or unknown FLASH type\n"); + return; + } + + switch (info->flash_id & FLASH_VENDMASK) { + case FLASH_MAN_AMD: + printf ("AMD "); + break; + case FLASH_MAN_FUJ: + printf ("FUJITSU "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM800T: + printf ("29LV800T (8 M, top sector)\n"); + break; + case FLASH_AM800B: + printf ("29LV800T (8 M, bottom sector)\n"); + break; + case FLASH_AM160T: + printf ("29LV160T (16 M, top sector)\n"); + break; + case FLASH_AM160B: + printf ("29LV160B (16 M, bottom sector)\n"); + break; + case FLASH_AMDL322T: + printf ("29DL322T (32 M, top sector)\n"); + break; + case FLASH_AMDL322B: + printf ("29DL322B (32 M, bottom sector)\n"); + break; + case FLASH_AMDL323T: + printf ("29DL323T (32 M, top sector)\n"); + break; + case FLASH_AMDL323B: + printf ("29DL323B (32 M, bottom sector)\n"); + break; + case FLASH_AM640U: + printf ("29LV640D (64 M, uniform sector)\n"); + break; + default: + printf ("Unknown Chip Type\n"); + break; + } + + printf (" Size: %ld MB in %d Sectors\n", + info->size >> 20, info->sector_count); + + printf (" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; ++i) { + if ((i % 5) == 0) + printf ("\n "); + printf (" %08lX%s", + info->start[i], + info->protect[i] ? " (RO)" : " " + ); + } + printf ("\n"); + return; +} + +/*----------------------------------------------------------------------- + */ +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + int flag, prot, sect, l_sect; + ulong start, now, last; + unsigned long msr; + DWORD cmd_erase[6] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL, + 0x0080008000800080LL, 0x00AA00AA00AA00AALL, + 0x0055005500550055LL, 0x0030003000300030LL }; + + if ((s_first < 0) || (s_first > s_last)) { + if (info->flash_id == FLASH_UNKNOWN) { + printf ("- missing\n"); + } else { + printf ("- no sectors to erase\n"); + } + return 1; + } + + prot = 0; + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect]) + prot++; + } + + if (prot) { + printf ("- Warning: %d protected sectors will not be erased!\n", + prot); + } else { + printf ("\n"); + } + + l_sect = -1; + + /* Enable FPU */ + msr = get_msr(); + set_msr ( msr | MSR_FP ); + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[0] ); + write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[1] ); + write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[2] ); + write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[3] ); + write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[4] ); + udelay (1000); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + write_via_fpu ((DWORD*)info->start[sect], &cmd_erase[5] ); + l_sect = sect; + } + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* Restore FPU */ + set_msr (msr); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + + /* + * We wait for the last triggered sector + */ + if (l_sect < 0) + goto DONE; + + start = get_timer (0); + last = start; + while ((*(volatile DWORD*)info->start[l_sect] & 0x0080008000800080LL ) + != 0x0080008000800080LL ) + { + if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + return 1; + } + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + serial_putc ('.'); + last = now; + } + } + + DONE: + /* reset to read mode */ + flash_reset (); + + printf (" done\n"); + return 0; +} + + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ + +int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + ulong dp; + static unsigned char bb[8]; + int i, l, rc, cc = cnt; + + dp = (addr & ~7); /* get lower dword aligned address */ + + /* + * handle unaligned start bytes + */ + if ((l = addr - dp) != 0) { + for (i = 0; i < 8; i++) + bb[i] = (i < l || (i - l) >= cc) ? *(char*)(dp + i) : *src++; + if ((rc = write_dword (info, dp, bb)) != 0) { + return (rc); + } + dp += 8; + cc -= 8 - l; + } + + /* + * handle word aligned part + */ + while (cc >= 8) { + if ((rc = write_dword (info, dp, src)) != 0) { + return (rc); + } + dp += 8; + src += 8; + cc -= 8; + } + + if (cc <= 0) { + return (0); + } + + /* + * handle unaligned tail bytes + */ + for (i = 0; i < 8; i++) { + bb[i] = (i < cc) ? *src++ : *(char*)(dp + i); + } + return (write_dword (info, dp, bb)); +} + +/*----------------------------------------------------------------------- + * Write a dword to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata) +{ + ulong start; + unsigned long msr; + int flag, i; + DWORD data; + DWORD cmd_write[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL, + 0x00A000A000A000A0LL }; + + for (data = 0, i = 0; i < 8; i++) + data = (data << 8) + *pdata++; + + /* Check if Flash is (sufficiently) erased */ + if ((*(DWORD*)dest & data) != data) { + return (2); + } + + /* Enable FPU */ + msr = get_msr(); + set_msr( msr | MSR_FP ); + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[0] ); + write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_write[1] ); + write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[2] ); + write_via_fpu ((DWORD*)dest, &data ); + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* Restore FPU */ + set_msr(msr); + + /* data polling for D7 */ + start = get_timer (0); + while (*(volatile DWORD*)dest != data ) { + if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + return (0); +} + +/*----------------------------------------------------------------------- + */ +static void write_via_fpu (volatile DWORD* addr, DWORD* data) +{ + __asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data)); + __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr)); + __asm__ __volatile__ ("eieio"); +} |