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Diffstat (limited to 'board/at91rm9200dk/flash.c')
| -rw-r--r-- | board/at91rm9200dk/flash.c | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/board/at91rm9200dk/flash.c b/board/at91rm9200dk/flash.c new file mode 100644 index 000000000..6497f11ca --- /dev/null +++ b/board/at91rm9200dk/flash.c @@ -0,0 +1,397 @@ +/* + * (C) Copyright 2002 + * Lineo, Inc. <www.lineo.com> + * Bernhard Kuhn <bkuhn@lineo.com> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +ulong myflush(void); + + +#define FLASH_BANK_SIZE 0x200000 /* 2 MB */ +#define MAIN_SECT_SIZE 0x10000 /* 64 KB */ + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + + +#define CMD_READ_ARRAY 0x00F0 +#define CMD_UNLOCK1 0x00AA +#define CMD_UNLOCK2 0x0055 +#define CMD_ERASE_SETUP 0x0080 +#define CMD_ERASE_CONFIRM 0x0030 +#define CMD_PROGRAM 0x00A0 +#define CMD_UNLOCK_BYPASS 0x0020 + +#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00005555<<1))) +#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00002AAA<<1))) + +#define BIT_ERASE_DONE 0x0080 +#define BIT_RDY_MASK 0x0080 +#define BIT_PROGRAM_ERROR 0x0020 +#define BIT_TIMEOUT 0x80000000 /* our flag */ + +#define READY 1 +#define ERR 2 +#define TMO 4 + +/*----------------------------------------------------------------------- + */ + +ulong flash_init(void) +{ + int i, j; + ulong size = 0; + + for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) + { + ulong flashbase = 0; + flash_info[i].flash_id = + (ATM_MANUFACT & FLASH_VENDMASK) | + (ATM_ID_BV1614 & FLASH_TYPEMASK); + flash_info[i].size = FLASH_BANK_SIZE; + flash_info[i].sector_count = CFG_MAX_FLASH_SECT; + memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT); + if (i == 0) + flashbase = PHYS_FLASH_1; + else + panic("configured to many flash banks!\n"); + for (j = 0; j < flash_info[i].sector_count; j++) + { + + if (j <= 9) + { + /* 1st to 8th are 8 KB */ + if (j <= 7) + { + flash_info[i].start[j] = flashbase + j*0x2000; + } + + /* 9th and 10th are both 32 KB */ + if ((j == 8) || (j == 9)) + { + flash_info[i].start[j] = flashbase + 0x10000 + (j-8)*0x8000; + } + } + else + { + flash_info[i].start[j] = flashbase + (j-8)*MAIN_SECT_SIZE; + } + } + size += flash_info[i].size; + } + + flash_protect(FLAG_PROTECT_SET, + CFG_FLASH_BASE, + CFG_ENV_ADDR - 1, + &flash_info[0]); + + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[0]); + + return size; +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t *info) +{ + int i; + + switch (info->flash_id & FLASH_VENDMASK) + { + case (ATM_MANUFACT & FLASH_VENDMASK): + printf("Atmel: "); + break; + default: + printf("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) + { + case (ATM_ID_BV1614 & FLASH_TYPEMASK): + printf("AT49BV1614 (16Mbit)\n"); + break; + default: + printf("Unknown Chip Type\n"); + goto Done; + 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"); + +Done: +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + ulong result; + int iflag, cflag, prot, sect; + int rc = ERR_OK; + int chip1; + + /* first look for protection bits */ + + if (info->flash_id == FLASH_UNKNOWN) + return ERR_UNKNOWN_FLASH_TYPE; + + if ((s_first < 0) || (s_first > s_last)) { + return ERR_INVAL; + } + + if ((info->flash_id & FLASH_VENDMASK) != + (ATM_MANUFACT & FLASH_VENDMASK)) { + return ERR_UNKNOWN_FLASH_VENDOR; + } + + prot = 0; + for (sect=s_first; sect<=s_last; ++sect) { + if (info->protect[sect]) { + prot++; + } + } + if (prot) + return ERR_PROTECTED; + + /* + * Disable interrupts which might cause a timeout + * here. Remember that our exception vectors are + * at address 0 in the flash, and we don't want a + * (ticker) exception to happen while the flash + * chip is in programming mode. + */ + cflag = icache_status(); + icache_disable(); + iflag = disable_interrupts(); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect<=s_last && !ctrlc(); sect++) + { + printf("Erasing sector %2d ... ", sect); + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked(); + + if (info->protect[sect] == 0) + { /* not protected */ + volatile u16 *addr = (volatile u16 *)(info->start[sect]); + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + MEM_FLASH_ADDR1 = CMD_ERASE_SETUP; + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + *addr = CMD_ERASE_CONFIRM; + + /* wait until flash is ready */ + chip1 = 0; + + do + { + result = *addr; + + /* check timeout */ + if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) + { + MEM_FLASH_ADDR1 = CMD_READ_ARRAY; + chip1 = TMO; + break; + } + + if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) + chip1 = READY; + + } while (!chip1); + + MEM_FLASH_ADDR1 = CMD_READ_ARRAY; + + if (chip1 == ERR) + { + rc = ERR_PROG_ERROR; + goto outahere; + } + if (chip1 == TMO) + { + rc = ERR_TIMOUT; + goto outahere; + } + + printf("ok.\n"); + } + else /* it was protected */ + { + printf("protected!\n"); + } + } + + if (ctrlc()) + printf("User Interrupt!\n"); + +outahere: + /* allow flash to settle - wait 10 ms */ + udelay_masked(10000); + + if (iflag) + enable_interrupts(); + + if (cflag) + icache_enable(); + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash + */ + +volatile static int write_word (flash_info_t *info, ulong dest, ulong data) +{ + volatile u16 *addr = (volatile u16 *)dest; + ulong result; + int rc = ERR_OK; + int cflag, iflag; + int chip1; + + /* + * Check if Flash is (sufficiently) erased + */ + result = *addr; + if ((result & data) != data) + return ERR_NOT_ERASED; + + + /* + * Disable interrupts which might cause a timeout + * here. Remember that our exception vectors are + * at address 0 in the flash, and we don't want a + * (ticker) exception to happen while the flash + * chip is in programming mode. + */ + cflag = icache_status(); + icache_disable(); + iflag = disable_interrupts(); + + MEM_FLASH_ADDR1 = CMD_UNLOCK1; + MEM_FLASH_ADDR2 = CMD_UNLOCK2; + MEM_FLASH_ADDR1 = CMD_PROGRAM; + *addr = data; + + /* arm simple, non interrupt dependent timer */ + reset_timer_masked(); + + /* wait until flash is ready */ + chip1 = 0; + do + { + result = *addr; + + /* check timeout */ + if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) + { + chip1 = ERR | TMO; + break; + } + if (!chip1 && ((result & 0x80) == (data & 0x80))) + chip1 = READY; + + } while (!chip1); + + *addr = CMD_READ_ARRAY; + + if (chip1 == ERR || *addr != data) + rc = ERR_PROG_ERROR; + + if (iflag) + enable_interrupts(); + + if (cflag) + icache_enable(); + + return rc; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash. + */ + +int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong wp, data; + int rc; + + if(addr & 1) { + printf("unaligned destination not supported\n"); + return ERR_ALIGN; + }; + + if((int)src & 1) { + printf("unaligned source not supported\n"); + return ERR_ALIGN; + }; + + wp = addr; + + while (cnt >= 2) { + data = *((volatile u16*)src); + if ((rc = write_word(info, wp, data)) != 0) { + return (rc); + } + src += 2; + wp += 2; + cnt -= 2; + } + + if(cnt == 1) { + data = (*((volatile u8*)src)) | (*((volatile u8*)(wp+1)) << 8); + if ((rc = write_word(info, wp, data)) != 0) { + return (rc); + } + src += 1; + wp += 1; + cnt -= 1; + }; + + return ERR_OK; +} |