/* * (C) Copyright 2002 * MAZeT GmbH * Stephan Linz , * * The most stuff comes from PPCBoot and Linux. * * IMMS gGmbH * Thomas Elste * * Modifications for ModNET50 Board * * 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 #include #define SCR (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_SYSTEM_CONTROL)) #define ALIGN_ABORT_OFF SCR = SCR & ~NETARM_GEN_SYS_CFG_ALIGN_ABORT #define ALIGN_ABORT_ON SCR = SCR | NETARM_GEN_SYS_CFG_ALIGN_ABORT #define PROG_ADDR (0x555*2) #define SETUP_ADDR (0x555*2) #define ID_ADDR (0x555*2) #define UNLOCK_ADDR1 (0x555*2) #define UNLOCK_ADDR2 (0x2AA*2) #define UNLOCK_CMD1 (0xAA) #define UNLOCK_CMD2 (0x55) #define ERASE_SUSPEND_CMD (0xB0) #define ERASE_RESUME_CMD (0x30) #define RESET_CMD (0xF0) #define ID_CMD (0x90) #define SECERASE_CMD (0x30) #define CHIPERASE_CMD (0x10) #define PROG_CMD (0xa0) #define SETUP_CMD (0x80) #define DQ2 (0x04) #define DQ3 (DQ2*2) #define DQ5 (DQ3*4) #define DQ6 (DQ5*2) #define WRITE_UNLOCK(addr) { \ *(volatile __u16*)(addr + UNLOCK_ADDR1) = (__u16)UNLOCK_CMD1; \ *(volatile __u16*)(addr + UNLOCK_ADDR2) = (__u16)UNLOCK_CMD2; \ } #define CONFIG_AM29_RESERVED (0) #define K (1024) #define MB (4) #define CELL_SIZE (64*K) #define DEVICE_SIZE (MB*K*K) #define CELLS_PER_DEVICE (DEVICE_SIZE/CELL_SIZE) #define RESERVED_CELLS (CONFIG_AM29_RESERVED*K)/CELL_SIZE #define MAX_FLASH_DEVICES (1) #define AVAIL_SIZE (DEVICE_SIZE*MAX_FLASH_DEVICES - RESERVED_CELLS*CELL_SIZE) flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; static __u16 toggling_bits; /*----------------------------------------------------------------------- */ ulong flash_get_size (ulong baseaddr, flash_info_t * info) { short i; __u16 flashtest; /* Write auto select command sequence and test FLASH answer */ WRITE_UNLOCK (baseaddr); *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) ID_CMD; flashtest /* manufacturer ID */ = *(volatile __u16 *) (baseaddr); *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) RESET_CMD; switch ((__u32) ((flashtest << 16) + flashtest)) { case AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD & FLASH_VENDMASK; break; case FUJ_MANUFACT: info->flash_id = FLASH_MAN_FUJ & FLASH_VENDMASK; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* no or unknown flash */ } /* Write auto select command sequence and test FLASH answer */ WRITE_UNLOCK (baseaddr); *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) ID_CMD; flashtest /* device ID */ = *(volatile __u16 *) (baseaddr + 2); *(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) RESET_CMD; /* toggling_bits = (flashtest == TOSHIBA)?(DQ6):(DQ2|DQ6); */ toggling_bits = (DQ2 | DQ6); switch ((__u32) ((flashtest << 16) + flashtest)) { case AMD_ID_LV160B: info->flash_id += (FLASH_AM160LV | FLASH_AM160B) & FLASH_TYPEMASK; info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; info->size = CONFIG_SYS_FLASH_SIZE; /* 1*16K Boot Block 2*8K Parameter Block 1*32K Small Main Block */ info->start[0] = baseaddr; info->start[1] = baseaddr + 0x4000; info->start[2] = baseaddr + 0x6000; info->start[3] = baseaddr + 0x8000; for (i = 1; i < info->sector_count; i++) info->start[3 + i] = baseaddr + i * CONFIG_SYS_MAIN_SECT_SIZE; break; default: info->flash_id = FLASH_UNKNOWN; return (0); /* no or unknown flash */ } for (i = 0; i < info->sector_count; i++) { /* Write auto select command sequence and test FLASH answer */ WRITE_UNLOCK (info->start[i]); *(volatile __u16 *) (info->start[i] + ID_ADDR) = (__u16) ID_CMD; flashtest /* protected verify */ = *(volatile __u16 *) (info->start[i] + 4); *(volatile __u16 *) (info->start[i] + ID_ADDR) = (__u16) RESET_CMD; if (flashtest & 0x0001) { info->protect[i] = 1; /* D0 = 1 if protected */ } else { info->protect[i] = 0; } } return (info->size); } /*----------------------------------------------------------------------- */ ulong flash_init (void) { ulong size = 0; int i; /* Init: no FLASHes known */ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* Static FLASH Bank configuration here (only one bank) */ size = flash_get_size (CONFIG_SYS_FLASH_BASE, &flash_info[0]); if (flash_info[0].flash_id == FLASH_UNKNOWN || size == 0) { printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", size, size >> 20); } /* * protect monitor and environment sectors */ flash_protect (FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]); flash_protect (FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); return size; } /*----------------------------------------------------------------------- */ 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_AMDL323B: printf ("29DL323B (32 M, bottom sector)\n"); break; case (FLASH_AM160LV | FLASH_AM160B): printf ("29LV160BE (1M x 16, bottom 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 % 4) == 0) printf ("\n "); printf (" S%02d @ 0x%08lX%s", i, info->start[i], info->protect[i] ? " !" : " "); } printf ("\n"); return; } /*----------------------------------------------------------------------- */ int flash_check_protection (flash_info_t * info, int s_first, int s_last) { int sect, prot = 0; for (sect = s_first; sect <= s_last; sect++) if (info->protect[sect]) prot++; if (prot) printf ("- can't erase %d protected sectors\n", prot); return prot; } /*----------------------------------------------------------------------- */ int flash_check_erase_amd (ulong start) { __u16 v1, v2; v1 = *(volatile __u16 *) (start); v2 = *(volatile __u16 *) (start); if (((v1 ^ v2) & toggling_bits) == toggling_bits) { if (((v1 | v2) & DQ5) == DQ5) { printf ("[DQ5] "); /* OOPS: exceeded timing limits */ v1 = *(volatile __u16 *) (start); v2 = *(volatile __u16 *) (start); if (((v1 ^ v2) & toggling_bits) == toggling_bits) { printf ("[%s] ", ((toggling_bits & (DQ2 | DQ6)) == (DQ2 | DQ6)) ? "DQ2,DQ6" : "DQ6"); /* OOPS: there is an erasure in progress, * try to reset chip */ *(volatile __u16 *) (start) = (__u16) RESET_CMD; return 1; /* still busy */ } } return 1; /* still busy */ } return 0; /* be free */ } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { int flag, sect, setup_offset = 0; int rc = ERR_OK; if (info->flash_id == FLASH_UNKNOWN) { printf ("- missing\n"); return ERR_UNKNOWN_FLASH_TYPE; } if ((s_first < 0) || (s_first > s_last)) { printf ("- no sectors to erase\n"); return ERR_INVAL; } if (flash_check_protection (info, s_first, s_last)) return ERR_PROTECTED; switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_FUJ: case FLASH_MAN_AMD: switch (info->flash_id & FLASH_TYPEMASK) { case (FLASH_AM160LV | FLASH_AM160B): setup_offset = UNLOCK_ADDR1; /* just the adress for setup_cmd differs */ case FLASH_AMDL323B: /* * 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. */ flag = disable_interrupts (); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { printf ("Erasing sector %2d ... ", sect); if (info->protect[sect] == 0) { /* not protected */ /* Write sector erase command sequence */ WRITE_UNLOCK (info->start[0]); *(volatile __u16 *) (info->start[0] + setup_offset) = (__u16) SETUP_CMD; WRITE_UNLOCK (info->start[0]); *(volatile __u16 *) (info-> start[sect]) = (__u16) SECERASE_CMD; /* wait some time */ reset_timer_masked (); while (get_timer_masked () < 1000) { } /* arm simple, non interrupt dependent timer */ reset_timer_masked (); while (flash_check_erase_amd (info->start[sect])) { if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) { printf ("timeout!\n"); /* OOPS: reach timeout, * try to reset chip */ *(volatile __u16 *) (info-> start[sect]) = (__u16) RESET_CMD; rc = ERR_TIMOUT; goto outahere_323B; } } printf ("ok.\n"); } else { printf ("protected!\n"); } } if (ctrlc ()) printf ("User Interrupt!\n"); outahere_323B: /* allow flash to settle - wait 10 ms */ udelay_masked (10000); if (flag) enable_interrupts (); return rc; default: printf ("- unknown chip type\n"); return ERR_UNKNOWN_FLASH_TYPE; } break; default: printf ("- unknown vendor "); return ERR_UNKNOWN_FLASH_VENDOR; } } /*----------------------------------------------------------------------- */ int flash_check_write_amd (ulong dest) { __u16 v1, v2; v1 = *(volatile __u16 *) (dest); v2 = *(volatile __u16 *) (dest); /* DQ6 toggles during write */ if (((v1 ^ v2) & DQ6) == DQ6) { if (((v1 | v2) & DQ5) == DQ5) { printf ("[DQ5] @ %08lX\n", dest); /* OOPS: exceeded timing limits, * try to reset chip */ *(volatile __u16 *) (dest) = (__u16) RESET_CMD; return 0; /* be free */ } return 1; /* still busy */ } return 0; /* be free */ } /*----------------------------------------------------------------------- * Copy memory to flash */ static int write_word (flash_info_t * info, ulong dest, ushort data) { int rc = ERR_OK; int flag; /* Check if Flash is (sufficiently) erased */ if ((*(__u16 *) (dest) & 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. */ flag = disable_interrupts (); /* Write program command sequence */ WRITE_UNLOCK (info->start[0]); /* Flash dependend program seqence */ switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_FUJ: case FLASH_MAN_AMD: switch (info->flash_id & FLASH_TYPEMASK) { case (FLASH_AM160LV | FLASH_AM160B): *(volatile __u16 *) (info->start[0] + UNLOCK_ADDR1) = (__u16) PROG_CMD; *(volatile __u16 *) (dest) = (__u16) data; break; case FLASH_AMDL323B: *(volatile __u16 *) (dest) = (__u16) PROG_CMD; *(volatile __u16 *) (dest) = (__u16) data; break; } } /* arm simple, non interrupt dependent timer */ reset_timer_masked (); while (flash_check_write_amd (dest)) { if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) { printf ("timeout! @ %08lX\n", dest); /* OOPS: reach timeout, * try to reset chip */ *(volatile __u16 *) (dest) = (__u16) RESET_CMD; rc = ERR_TIMOUT; goto outahere_323B; } } /* Check if Flash was (accurately) written */ if (*(__u16 *) (dest) != data) rc = ERR_PROG_ERROR; outahere_323B: if (flag) enable_interrupts (); return rc; } /*----------------------------------------------------------------------- * Copy memory to flash. */ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) { ulong cp, wp; ushort data; int l; int i, rc; wp = (addr & ~1); /* 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 << 8); } for (; i < 2 && cnt > 0; ++i) { data = (data >> 8) | (*src++ << 8); --cnt; ++cp; } for (; cnt == 0 && i < 2; ++i, ++cp) { data = (data >> 8) | (*(uchar *) cp << 8); } if ((rc = write_word (info, wp, data)) != 0) { return (rc); } wp += 2; } /* * handle word aligned part */ while (cnt >= 2) { data = *((ushort *) src); if ((rc = write_word (info, wp, data)) != 0) return (rc); src += 2; wp += 2; cnt -= 2; } if (cnt == 0) return ERR_OK; /* * handle unaligned tail bytes */ data = 0; for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) { data = (data >> 8) | (*src++ << 8); --cnt; } for (; i < 2; ++i, ++cp) { data = (data >> 8) | (*(uchar *) cp << 8); } return write_word (info, wp, data); }