| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2000-2003 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| */ |
| |
| #include <config.h> |
| #include <console.h> |
| #include <cpu_func.h> |
| #include <flash.h> |
| #include <irq_func.h> |
| #include <stdio.h> |
| #include <time.h> |
| #include <uuid.h> |
| #include <vsprintf.h> |
| #include <linux/delay.h> |
| #include <linux/string.h> |
| |
| #define PHYS_FLASH_1 CFG_SYS_FLASH_BASE |
| #define FLASH_BANK_SIZE 0x200000 |
| |
| flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
| |
| void flash_print_info(flash_info_t *info) |
| { |
| int i; |
| |
| switch (info->flash_id & FLASH_VENDMASK) { |
| case (AMD_MANUFACT & FLASH_VENDMASK): |
| printf ("AMD: "); |
| break; |
| default: |
| printf ("Unknown Vendor "); |
| break; |
| } |
| |
| switch (info->flash_id & FLASH_TYPEMASK) { |
| case (AMD_ID_PL160CB & FLASH_TYPEMASK): |
| printf ("AM29PL160CB (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: |
| return; |
| } |
| |
| unsigned long flash_init(void) |
| { |
| int i, j; |
| ulong size = 0; |
| |
| for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
| ulong flashbase = 0; |
| |
| flash_info[i].flash_id = |
| (AMD_MANUFACT & FLASH_VENDMASK) | |
| (AMD_ID_PL160CB & FLASH_TYPEMASK); |
| flash_info[i].size = FLASH_BANK_SIZE; |
| flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT; |
| memset (flash_info[i].protect, 0, CONFIG_SYS_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 == 0) { |
| /* 1st is 16 KiB */ |
| flash_info[i].start[j] = flashbase; |
| } |
| if ((j >= 1) && (j <= 2)) { |
| /* 2nd and 3rd are 8 KiB */ |
| flash_info[i].start[j] = |
| flashbase + 0x4000 + 0x2000 * (j - 1); |
| } |
| if (j == 3) { |
| /* 4th is 224 KiB */ |
| flash_info[i].start[j] = flashbase + 0x8000; |
| } |
| if ((j >= 4) && (j <= 10)) { |
| /* rest is 256 KiB */ |
| flash_info[i].start[j] = |
| flashbase + 0x40000 + 0x40000 * (j - |
| 4); |
| } |
| } |
| size += flash_info[i].size; |
| } |
| |
| flash_protect(FLAG_PROTECT_SET, |
| CFG_SYS_FLASH_BASE, |
| CFG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]); |
| |
| return size; |
| } |
| |
| #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_SYS_FLASH_BASE + (0x00000555<<1))) |
| #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_SYS_FLASH_BASE + (0x000002AA<<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 |
| |
| 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; |
| ulong start; |
| |
| /* 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) != |
| (AMD_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(); |
| |
| printf ("\n"); |
| |
| /* 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 */ |
| start = get_timer(0); |
| |
| 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, 1000ms */ |
| if (get_timer(start) > 1000) { |
| 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_TIMEOUT; |
| 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 */ |
| mdelay(10); |
| |
| if (iflag) |
| enable_interrupts(); |
| |
| if (cflag) |
| icache_enable(); |
| |
| return rc; |
| } |
| |
| 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; |
| ulong start; |
| |
| /* |
| * 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 */ |
| start = get_timer(0); |
| |
| /* wait until flash is ready */ |
| chip1 = 0; |
| do { |
| result = *addr; |
| |
| /* check timeout, 1000ms */ |
| if (get_timer(start) > 1000) { |
| 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; |
| } |
| |
| 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 0 |
| if (cnt & 1) { |
| printf ("odd transfer sizes not supported\n"); |
| return ERR_ALIGN; |
| } |
| #endif |
| |
| wp = addr; |
| |
| if (addr & 1) { |
| data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *) |
| src); |
| if ((rc = write_word (info, wp - 1, data)) != 0) { |
| return (rc); |
| } |
| src += 1; |
| wp += 1; |
| cnt -= 1; |
| } |
| |
| 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) << 8) | |
| *((volatile u8 *) (wp + 1)); |
| if ((rc = write_word (info, wp, data)) != 0) { |
| return (rc); |
| } |
| src += 1; |
| wp += 1; |
| cnt -= 1; |
| } |
| |
| return ERR_OK; |
| } |