diff options
Diffstat (limited to 'board/sc520_cdp/flash.c')
| -rw-r--r-- | board/sc520_cdp/flash.c | 251 |
1 files changed, 123 insertions, 128 deletions
diff --git a/board/sc520_cdp/flash.c b/board/sc520_cdp/flash.c index 1ebb32e..a4d37e5 100644 --- a/board/sc520_cdp/flash.c +++ b/board/sc520_cdp/flash.c @@ -1,7 +1,7 @@ /* * (C) Copyright 2002, 2003 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se - * + * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Alex Zuepke <azu@sysgo.de> @@ -55,122 +55,121 @@ flash_info_t flash_info[SC520_MAX_FLASH_BANKS]; static u32 _probe_flash(u32 addr, u32 bw, int il) { u32 result=0; - + /* First do an unlock cycle for the benefit of * devices that need it */ - + switch (bw) { - + case 1: *(volatile u8*)(addr+0x5555) = 0xaa; *(volatile u8*)(addr+0x2aaa) = 0x55; *(volatile u8*)(addr+0x5555) = 0x90; - + /* Read vendor */ result = *(volatile u8*)addr; result <<= 16; - + /* Read device */ result |= *(volatile u8*)(addr+2); - + /* Return device to data mode */ *(volatile u8*)addr = 0xff; - *(volatile u8*)(addr+0x5555), 0xf0; + *(volatile u8*)(addr+0x5555), 0xf0; break; - + case 2: *(volatile u16*)(addr+0xaaaa) = 0xaaaa; *(volatile u16*)(addr+0x5554) = 0x5555; - + /* Issue identification command */ if (il == 2) { *(volatile u16*)(addr+0xaaaa) = 0x9090; - + /* Read vendor */ result = *(volatile u8*)addr; result <<= 16; - + /* Read device */ result |= *(volatile u8*)(addr+2); - + /* Return device to data mode */ *(volatile u16*)addr = 0xffff; - *(volatile u16*)(addr+0xaaaa), 0xf0f0; - + *(volatile u16*)(addr+0xaaaa), 0xf0f0; + } else { *(volatile u8*)(addr+0xaaaa) = 0x90; /* Read vendor */ result = *(volatile u16*)addr; result <<= 16; - + /* Read device */ result |= *(volatile u16*)(addr+2); - + /* Return device to data mode */ *(volatile u8*)addr = 0xff; - *(volatile u8*)(addr+0xaaaa), 0xf0; + *(volatile u8*)(addr+0xaaaa), 0xf0; } - + break; - + case 4: *(volatile u32*)(addr+0x5554) = 0xaaaaaaaa; *(volatile u32*)(addr+0xaaa8) = 0x55555555; - + switch (il) { case 1: /* Issue identification command */ *(volatile u8*)(addr+0x5554) = 0x90; - + /* Read vendor */ result = *(volatile u16*)addr; result <<= 16; - + /* Read device */ result |= *(volatile u16*)(addr+4); - + /* Return device to data mode */ *(volatile u8*)addr = 0xff; - *(volatile u8*)(addr+0x5554), 0xf0; + *(volatile u8*)(addr+0x5554), 0xf0; break; - + case 2: /* Issue identification command */ *(volatile u32*)(addr + 0x5554) = 0x00900090; - + /* Read vendor */ result = *(volatile u16*)addr; result <<= 16; - + /* Read device */ result |= *(volatile u16*)(addr+4); - + /* Return device to data mode */ *(volatile u32*)addr = 0x00ff00ff; - *(volatile u32*)(addr+0x5554), 0x00f000f0; + *(volatile u32*)(addr+0x5554), 0x00f000f0; break; - + case 4: /* Issue identification command */ *(volatile u32*)(addr+0x5554) = 0x90909090; - + /* Read vendor */ result = *(volatile u8*)addr; result <<= 16; - + /* Read device */ result |= *(volatile u8*)(addr+4); - + /* Return device to data mode */ *(volatile u32*)addr = 0xffffffff; - *(volatile u32*)(addr+0x5554), 0xf0f0f0f0; + *(volatile u32*)(addr+0x5554), 0xf0f0f0f0; break; } break; } - - - + + return result; } @@ -180,36 +179,36 @@ asm ("_probe_flash_end:\n" static int identify_flash(unsigned address, int width) { - int is; + int is; int device; - int vendor; + int vendor; int size; unsigned res; - + u32 (*_probe_flash_ptr)(u32 a, u32 bw, int il); - - size = (unsigned)&_probe_flash_end - (unsigned)_probe_flash; - + + size = (unsigned)&_probe_flash_end - (unsigned)_probe_flash; + if (size > PROBE_BUFFER_SIZE) { printf("_probe_flash() routine too large (%d) %p - %p\n", size, &_probe_flash_end, _probe_flash); return 0; } - + memcpy(buffer, _probe_flash, size); _probe_flash_ptr = (void*)buffer; - + is = disable_interrupts(); res = _probe_flash_ptr(address, width, 1); if (is) { enable_interrupts(); } - - - vendor = res >> 16; + + + vendor = res >> 16; device = res & 0xffff; - - + + return res; } @@ -217,12 +216,12 @@ ulong flash_init(void) { int i, j; ulong size = 0; - + for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) { unsigned id; ulong flashbase = 0; - int sectsize = 0; - + int sectsize = 0; + memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT); switch (i) { case 0: @@ -237,7 +236,7 @@ ulong flash_init(void) default: panic("configured to many flash banks!\n"); } - + id = identify_flash(flashbase, 4); switch (id & 0x00ff00ff) { case 0x000100c8: @@ -245,31 +244,31 @@ ulong flash_init(void) flash_info[i].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) | (AMD_ID_LV016B & FLASH_TYPEMASK); - + flash_info[i].size = AMD29LV016B_SIZE*4; flash_info[i].sector_count = AMD29LV016B_SECTORS; sectsize = (AMD29LV016B_SIZE*4)/AMD29LV016B_SECTORS; printf("Bank %d: 4 x AMD 29LV017B\n", i); break; - - + + default: printf("Bank %d have unknown flash %08x\n", i, id); flash_info[i].flash_id = FLASH_UNKNOWN; continue; } - + for (j = 0; j < flash_info[i].sector_count; j++) { flash_info[i].start[j] = flashbase + j * sectsize; } size += flash_info[i].size; - + flash_protect(FLAG_PROTECT_CLEAR, flash_info[i].start[0], flash_info[i].start[0] + flash_info[i].size - 1, &flash_info[i]); } - + /* * Protect monitor and environment sectors */ @@ -282,7 +281,7 @@ ulong flash_init(void) CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); -#endif +#endif return size; } @@ -291,9 +290,9 @@ ulong flash_init(void) void flash_print_info(flash_info_t *info) { int i; - + switch (info->flash_id & FLASH_VENDMASK) { - + case (AMD_MANUFACT & FLASH_VENDMASK): printf("AMD: "); switch (info->flash_id & FLASH_TYPEMASK) { @@ -305,17 +304,17 @@ void flash_print_info(flash_info_t *info) goto done; break; } - + break; default: printf("Unknown Vendor "); 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) { @@ -325,7 +324,7 @@ void flash_print_info(flash_info_t *info) info->protect[i] ? " (RO)" : " "); } printf ("\n"); - + done: } @@ -339,7 +338,7 @@ void flash_print_info(flash_info_t *info) unsigned milli=0; \ \ micro = *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); \ - \ + \ for (;;) { \ \ milli += *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); \ @@ -349,12 +348,12 @@ void flash_print_info(flash_info_t *info) break; \ } \ } \ -} while (0) +} while (0) static u32 _amd_erase_flash(u32 addr, u32 sector) { unsigned elapsed; - + /* Issue erase */ *(volatile u32*)(addr + 0x5554) = 0xAAAAAAAA; *(volatile u32*)(addr + 0xaaa8) = 0x55555555; @@ -364,21 +363,21 @@ static u32 _amd_erase_flash(u32 addr, u32 sector) *(volatile u32*)(addr + 0xaaa8) = 0x55555555; /* Sector erase command comes last */ *(volatile u32*)(addr + sector) = 0x30303030; - + elapsed = *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); /* dummy read */ elapsed = 0; __udelay(50); while (((*(volatile u32*)(addr + sector)) & 0x80808080) != 0x80808080) { - + elapsed += *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); if (elapsed > ((CFG_FLASH_ERASE_TOUT/CFG_HZ) * 1000)) { *(volatile u32*)(addr) = 0xf0f0f0f0; - return 1; + return 1; } } - + *(volatile u32*)(addr) = 0xf0f0f0f0; - + return 0; } @@ -392,7 +391,7 @@ int flash_erase(flash_info_t *info, int s_first, int s_last) int prot; int sect; unsigned size; - + if ((s_first < 0) || (s_first > s_last)) { if (info->flash_id == FLASH_UNKNOWN) { printf("- missing\n"); @@ -401,66 +400,66 @@ int flash_erase(flash_info_t *info, int s_first, int s_last) } return 1; } - + if ((info->flash_id & FLASH_VENDMASK) == (AMD_MANUFACT & FLASH_VENDMASK)) { - size = (unsigned)&_amd_erase_flash_end - (unsigned)_amd_erase_flash; - + size = (unsigned)&_amd_erase_flash_end - (unsigned)_amd_erase_flash; + if (size > PROBE_BUFFER_SIZE) { printf("_amd_erase_flash() routine too large (%d) %p - %p\n", size, &_amd_erase_flash_end, _amd_erase_flash); return 0; } - + memcpy(buffer, _amd_erase_flash, size); _erase_flash_ptr = (void*)buffer; - + } else { 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"); } - - + + /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { - + if (info->protect[sect] == 0) { /* not protected */ int res; int flag; - + /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); - + res = _erase_flash_ptr(info->start[0], info->start[sect]-info->start[0]); - + /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); } - - + + if (res) { printf("Erase timed out, sector %d\n", sect); return res; } - - putc('.'); - } + + putc('.'); + } } - + return 0; } @@ -476,33 +475,33 @@ static int _amd_write_word(unsigned start, unsigned dest, unsigned data) volatile u32 *dest2 = (u32*)dest; volatile u32 *data2 = (u32*)&data; unsigned elapsed; - + /* Check if Flash is (sufficiently) erased */ if ((*((volatile u32*)dest) & (u32)data) != (u32)data) { return 2; } - + addr2[0x5554] = 0xAAAAAAAA; addr2[0xaaa8] = 0x55555555; addr2[0x5554] = 0xA0A0A0A0; - + dest2[0] = data; - + elapsed = *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); /* dummy read */ elapsed = 0; - + /* data polling for D7 */ while ((dest2[0] & 0x80808080) != (data2[0] & 0x80808080)) { elapsed += *(volatile u16*)(0xfffef000+SC520_SWTMRMILLI); if (elapsed > ((CFG_FLASH_WRITE_TOUT/CFG_HZ) * 1000)) { addr2[0] = 0xf0f0f0f0; - return 1; + return 1; } } - + addr2[0] = 0xf0f0f0f0; - + return 0; } @@ -511,8 +510,6 @@ asm ("_amd_write_word_end:\n" ".long 0\n"); - - /*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK @@ -528,19 +525,19 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) int flag; u32 (*_write_word_ptr)(unsigned start, unsigned dest, unsigned data); unsigned size; - + if ((info->flash_id & FLASH_VENDMASK) == (AMD_MANUFACT & FLASH_VENDMASK)) { - size = (unsigned)&_amd_write_word_end - (unsigned)_amd_write_word; - + size = (unsigned)&_amd_write_word_end - (unsigned)_amd_write_word; + if (size > PROBE_BUFFER_SIZE) { printf("_amd_write_word() routine too large (%d) %p - %p\n", size, &_amd_write_word_end, _amd_write_word); return 0; } - + memcpy(buffer, _amd_write_word, size); _write_word_ptr = (void*)buffer; - + } else { printf ("Can't program unknown flash type - aborted\n"); return 3; @@ -548,7 +545,7 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) wp = (addr & ~3); /* get lower word aligned address */ - + /* * handle unaligned start bytes @@ -566,12 +563,12 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) for (; cnt==0 && i<4; ++i, ++cp) { data |= (*(uchar *)cp) << (8*i); } - + /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); - + rc = _write_word_ptr(info->start[0], wp, data); - + /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); @@ -581,22 +578,22 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) } wp += 4; } - + /* * handle word aligned part */ while (cnt >= 4) { data = 0; - + for (i=0; i<4; ++i) { data |= *src++ << (8*i); } - + /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); rc = _write_word_ptr(info->start[0], wp, data); - + /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); @@ -607,11 +604,11 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) wp += 4; cnt -= 4; } - + if (cnt == 0) { return 0; } - + /* * handle unaligned tail bytes */ @@ -620,7 +617,7 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) data |= *src++ << (8*i); --cnt; } - + for (; i<4; ++i, ++cp) { data |= (*(uchar *)cp) << (8*i); } @@ -629,14 +626,12 @@ int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) flag = disable_interrupts(); rc = _write_word_ptr(info->start[0], wp, data); - + /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); } - - return rc; - -} + return rc; +} |