/* * (C) Copyright 2001 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2002 * Gregory E. Allen, gallen@arlut.utexas.edu * Matthew E. Karger, karger@arlut.utexas.edu * Applied Research Laboratories, The University of Texas at Austin * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <mpc824x.h> #include <asm/processor.h> #define ROM_CS0_START 0xFF800000 #define ROM_CS1_START 0xFF000000 #if defined(CONFIG_ENV_IS_IN_FLASH) # ifndef CONFIG_ENV_ADDR # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET) # endif # ifndef CONFIG_ENV_SIZE # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE # endif # ifndef CONFIG_ENV_SECT_SIZE # define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE # endif #endif #define FLASH_BANK_SIZE ((uint)(16 * 1024 * 1024)) /* max 16Mbyte */ #define MAIN_SECT_SIZE 0x10000 #define SECT_SIZE_32KB 0x8000 #define SECT_SIZE_8KB 0x2000 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; static int write_word (flash_info_t * info, ulong dest, ulong data); #if 0 static void write_via_fpu (vu_long * addr, ulong * data); #endif static __inline__ unsigned long get_msr (void); static __inline__ void set_msr (unsigned long msr); /*flash command address offsets*/ #define ADDR0 (0x555) #define ADDR1 (0xAAA) #define ADDR3 (0x001) #define FLASH_WORD_SIZE unsigned char /*---------------------------------------------------------------------*/ /*#define DEBUG_FLASH 1 */ /*---------------------------------------------------------------------*/ unsigned long flash_init (void) { int i; /* flash bank counter */ int j; /* flash device sector counter */ int k; /* flash size calculation loop counter */ int N; /* pow(2,N) is flash size, but we don't have <math.h> */ ulong total_size = 0, device_size = 1; unsigned char manuf_id, device_id; for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { vu_char *addr = (vu_char *) (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE); addr[0x555] = 0xAA; /* get manuf/device info command */ addr[0x2AA] = 0x55; /* 3-cycle command */ addr[0x555] = 0x90; manuf_id = addr[0]; /* read back manuf/device info */ device_id = addr[1]; addr[0x55] = 0x98; /* CFI command */ N = addr[0x27]; /* read back device_size = pow(2,N) */ for (k = 0; k < N; k++) /* calculate device_size = pow(2,N) */ device_size *= 2; flash_info[i].size = device_size; flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT; #if defined DEBUG_FLASH printf ("manuf_id = %x, device_id = %x\n", manuf_id, device_id); #endif /* find out what kind of flash we are using */ if ((manuf_id == (uchar) (AMD_MANUFACT)) && (device_id == AMD_ID_LV033C)) { flash_info[i].flash_id = ((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) | (FLASH_AM033C & FLASH_TYPEMASK); /* set individual sector start addresses */ for (j = 0; j < flash_info[i].sector_count; j++) { flash_info[i].start[j] = (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE); } } else if ((manuf_id == (uchar) (AMD_MANUFACT)) && (device_id == AMD_ID_LV116DT)) { flash_info[i].flash_id = ((FLASH_MAN_AMD & FLASH_VENDMASK) << 16) | (FLASH_AM160T & FLASH_TYPEMASK); /* set individual sector start addresses */ for (j = 0; j < flash_info[i].sector_count; j++) { flash_info[i].start[j] = (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE); if (j < (CONFIG_SYS_MAX_FLASH_SECT - 3)) { flash_info[i].start[j] = (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE); } else if (j == (CONFIG_SYS_MAX_FLASH_SECT - 3)) { flash_info[i].start[j] = (flash_info[i].start[j - 1] + SECT_SIZE_32KB); } else { flash_info[i].start[j] = (flash_info[i].start[j - 1] + SECT_SIZE_8KB); } } } else { flash_info[i].flash_id = FLASH_UNKNOWN; addr[0] = 0xFF; goto Done; } #if defined DEBUG_FLASH printf ("flash_id = 0x%08lX\n", flash_info[i].flash_id); #endif addr[0] = 0xFF; memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT); total_size += flash_info[i].size; } /* Protect monitor and environment sectors */ #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE flash_protect (FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]); #endif #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) flash_protect (FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); #endif Done: return total_size; } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t * info) { static const char unk[] = "Unknown"; const char *mfct = unk, *type = unk; unsigned int i; if (info->flash_id != FLASH_UNKNOWN) { switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_AMD: mfct = "AMD"; break; case FLASH_MAN_FUJ: mfct = "FUJITSU"; break; case FLASH_MAN_STM: mfct = "STM"; break; case FLASH_MAN_SST: mfct = "SST"; break; case FLASH_MAN_BM: mfct = "Bright Microelectonics"; break; case FLASH_MAN_INTEL: mfct = "Intel"; break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM033C: type = "AM29LV033C (32 Mbit, uniform sector size)"; break; case FLASH_AM160T: type = "AM29LV160T (16 Mbit, top boot sector)"; break; case FLASH_AM040: type = "AM29F040B (512K * 8, uniform sector size)"; break; case FLASH_AM400B: type = "AM29LV400B (4 Mbit, bottom boot sect)"; break; case FLASH_AM400T: type = "AM29LV400T (4 Mbit, top boot sector)"; break; case FLASH_AM800B: type = "AM29LV800B (8 Mbit, bottom boot sect)"; break; case FLASH_AM800T: type = "AM29LV800T (8 Mbit, top boot sector)"; break; case FLASH_AM320B: type = "AM29LV320B (32 Mbit, bottom boot sect)"; break; case FLASH_AM320T: type = "AM29LV320T (32 Mbit, top boot sector)"; break; case FLASH_STM800AB: type = "M29W800AB (8 Mbit, bottom boot sect)"; break; case FLASH_SST800A: type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; break; case FLASH_SST160A: type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; break; } } printf ("\n Brand: %s Type: %s\n" " Size: %lu KB in %d Sectors\n", mfct, type, info->size >> 10, info->sector_count); printf (" Sector Start Addresses:"); for (i = 0; i < info->sector_count; i++) { unsigned long size; unsigned int erased; unsigned long *flash = (unsigned long *) info->start[i]; /* * Check if whole sector is erased */ size = (i != (info->sector_count - 1)) ? (info->start[i + 1] - info->start[i]) >> 2 : (info->start[0] + info->size - info->start[i]) >> 2; for (flash = (unsigned long *) info->start[i], erased = 1; (flash != (unsigned long *) info->start[i] + size) && erased; flash++) erased = *flash == ~0x0UL; printf ("%s %08lX %s %s", (i % 5) ? "" : "\n ", info->start[i], erased ? "E" : " ", info->protect[i] ? "RO" : " "); } puts ("\n"); return; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]); int flag, prot, sect, l_sect; ulong start, now, last; unsigned char sh8b; 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; } if ((info->flash_id == FLASH_UNKNOWN) || (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) { printf ("Can't erase unknown flash type - aborted\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; /* Check the ROM CS */ if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START)) sh8b = 3; else sh8b = 0; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055; addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080; addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055; /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info-> start[sect] - info-> start[0]) << sh8b)); if (info->flash_id & FLASH_MAN_SST) { addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055; addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00800080; addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055; addr[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */ udelay (30000); /* wait 30 ms */ } else { addr[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */ } l_sect = sect; } } /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* 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; addr = (FLASH_WORD_SIZE *) (info->start[0] + ((info->start[l_sect] - info-> start[0]) << sh8b)); while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) != (FLASH_WORD_SIZE) 0x00800080) { if ((now = get_timer (start)) > CONFIG_SYS_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 */ addr = (FLASH_WORD_SIZE *) info->start[0]; addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ 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 cp, wp, data; int i, l, rc; wp = (addr & ~3); /* get lower word aligned address */ /* * handle unaligned start bytes */ if ((l = addr - wp) != 0) { data = 0; for (i = 0, cp = wp; i < l; ++i, ++cp) { data = (data << 8) | (*(uchar *) cp); } for (; i < 4 && cnt > 0; ++i) { data = (data << 8) | *src++; --cnt; ++cp; } for (; cnt == 0 && i < 4; ++i, ++cp) { data = (data << 8) | (*(uchar *) cp); } if ((rc = write_word (info, wp, data)) != 0) { return (rc); } wp += 4; } /* * handle word aligned part */ while (cnt >= 4) { data = 0; for (i = 0; i < 4; ++i) { data = (data << 8) | *src++; } if ((rc = write_word (info, wp, data)) != 0) { return (rc); } wp += 4; cnt -= 4; } if (cnt == 0) { return (0); } /* * handle unaligned tail bytes */ data = 0; for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) { data = (data << 8) | *src++; --cnt; } for (; i < 4; ++i, ++cp) { data = (data << 8) | (*(uchar *) cp); } return (write_word (info, wp, data)); } /*----------------------------------------------------------------------- * Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_word (flash_info_t * info, ulong dest, ulong data) { volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) info->start[0]; volatile FLASH_WORD_SIZE *dest2; volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data; ulong start; int flag; int i; unsigned char sh8b; /* Check the ROM CS */ if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START)) sh8b = 3; else sh8b = 0; dest2 = (FLASH_WORD_SIZE *) (((dest - info->start[0]) << sh8b) + info->start[0]); /* Check if Flash is (sufficiently) erased */ if ((*dest2 & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) { addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00AA00AA; addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE) 0x00550055; addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE) 0x00A000A0; dest2[i << sh8b] = data2[i]; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* data polling for D7 */ start = get_timer (0); while ((dest2[i << sh8b] & (FLASH_WORD_SIZE) 0x00800080) != (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) { if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { return (1); } } } return (0); } /*----------------------------------------------------------------------- */ #if 0 static void write_via_fpu (vu_long * addr, ulong * data) { __asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data)); __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr)); } #endif /*----------------------------------------------------------------------- */ static __inline__ unsigned long get_msr (void) { unsigned long msr; __asm__ __volatile__ ("mfmsr %0":"=r" (msr):); return msr; } static __inline__ void set_msr (unsigned long msr) { __asm__ __volatile__ ("mtmsr %0"::"r" (msr)); }