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Diffstat (limited to 'board/Marvell/common/flash.c')
| -rw-r--r-- | board/Marvell/common/flash.c | 1072 |
1 files changed, 1072 insertions, 0 deletions
diff --git a/board/Marvell/common/flash.c b/board/Marvell/common/flash.c new file mode 100644 index 0000000..21eae0e --- /dev/null +++ b/board/Marvell/common/flash.c @@ -0,0 +1,1072 @@ +/* + * (C) Copyright 2001 + * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. + * + * 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 + */ + +/* + * flash.c - flash support for the 512k, 8bit boot flash + and the 8MB 32bit extra flash on the DB64360 + * most of this file was based on the existing U-Boot + * flash drivers. + * + * written or collected and sometimes rewritten by + * Ingo Assmus <ingo.assmus@keymile.com> + * + */ + +#include <common.h> +#include <mpc8xx.h> +#include "../include/mv_gen_reg.h" +#include "../include/memory.h" +#include "intel_flash.h" + +#define FLASH_ROM 0xFFFD /* unknown flash type */ +#define FLASH_RAM 0xFFFE /* unknown flash type */ +#define FLASH_MAN_UNKNOWN 0xFFFF0000 + +/* #define DEBUG */ + +/* Intel flash commands */ +int flash_erase_intel (flash_info_t * info, int s_first, int s_last); +int write_word_intel (bank_addr_t addr, bank_word_t value); + +flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size (int portwidth, vu_long * addr, + flash_info_t * info); +static int write_word (flash_info_t * info, ulong dest, ulong data); +static void flash_get_offsets (ulong base, flash_info_t * info); + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init (void) +{ + unsigned int i; + unsigned long size_b0 = 0, size_b1 = 0; + unsigned long base, flash_size; + + /* Init: no FLASHes known */ + for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* the boot flash */ + base = CONFIG_SYS_FLASH_BASE; + size_b0 = + flash_get_size (CONFIG_SYS_BOOT_FLASH_WIDTH, (vu_long *) base, + &flash_info[0]); + + printf ("[%ldkB@%lx] ", size_b0 / 1024, base); + + if (flash_info[0].flash_id == FLASH_UNKNOWN) { + printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0 << 20); + } + + base = memoryGetDeviceBaseAddress (CONFIG_SYS_EXTRA_FLASH_DEVICE); +/* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/ + for (i = 1; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { + unsigned long size = + flash_get_size (CONFIG_SYS_EXTRA_FLASH_WIDTH, + (vu_long *) base, &flash_info[i]); + + printf ("[%ldMB@%lx] ", size >> 20, base); + + if (flash_info[i].flash_id == FLASH_UNKNOWN) { + if (i == 1) { + printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1 << 20); + } + break; + } + size_b1 += size; + base += size; + } + + flash_size = size_b0 + size_b1; + return flash_size; +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets (ulong base, flash_info_t * info) +{ + int i; + int sector_size; + + if (!info->sector_count) + return; + + /* set up sector start address table */ + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM040: + case FLASH_28F128J3A: + case FLASH_28F640J3A: + case FLASH_RAM: + /* this chip has uniformly spaced sectors */ + sector_size = info->size / info->sector_count; + for (i = 0; i < info->sector_count; i++) + info->start[i] = base + (i * sector_size); + break; + default: + if (info->flash_id & FLASH_BTYPE) { + /* set sector offsets for bottom boot block type */ + info->start[0] = base + 0x00000000; + info->start[1] = base + 0x00008000; + info->start[2] = base + 0x0000C000; + info->start[3] = base + 0x00010000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = + base + (i * 0x00020000) - 0x00060000; + } + } else { + /* set sector offsets for top boot block type */ + i = info->sector_count - 1; + info->start[i--] = base + info->size - 0x00008000; + info->start[i--] = base + info->size - 0x0000C000; + info->start[i--] = base + info->size - 0x00010000; + for (; i >= 0; i--) { + info->start[i] = base + i * 0x00020000; + } + } + } +} + +/*----------------------------------------------------------------------- + */ +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_STM: + printf ("STM "); + break; + case FLASH_MAN_AMD: + printf ("AMD "); + break; + case FLASH_MAN_FUJ: + printf ("FUJITSU "); + break; + case FLASH_MAN_INTEL: + printf ("INTEL "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM040: + printf ("AM29LV040B (4 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM400B: + printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM400T: + printf ("AM29LV400T (4 Mbit, top boot sector)\n"); + break; + case FLASH_AM800B: + printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM800T: + printf ("AM29LV800T (8 Mbit, top boot sector)\n"); + break; + case FLASH_AM160B: + printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM160T: + printf ("AM29LV160T (16 Mbit, top boot sector)\n"); + break; + case FLASH_AM320B: + printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM320T: + printf ("AM29LV320T (32 Mbit, top boot sector)\n"); + break; + case FLASH_28F640J3A: + printf ("28F640J3A (64 Mbit)\n"); + break; + case FLASH_28F128J3A: + printf ("28F128J3A (128 Mbit)\n"); + break; + case FLASH_ROM: + printf ("ROM\n"); + break; + case FLASH_RAM: + printf ("RAM\n"); + break; + default: + printf ("Unknown Chip Type\n"); + break; + } + + if ((info->size >> 20) > 0) { + printf (" Size: %ld MB in %d Sectors\n", + info->size >> 20, info->sector_count); + } else { + printf (" Size: %ld kB in %d Sectors\n", + info->size >> 10, 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"); + return; +} + +/*----------------------------------------------------------------------- + */ + + +/*----------------------------------------------------------------------- + */ + +/* + * The following code cannot be run from FLASH! + */ + +static inline void flash_cmd (int width, volatile unsigned char *addr, + int offset, unsigned char cmd) +{ + /* supports 1x8, 1x16, and 2x16 */ + /* 2x8 and 4x8 are not supported */ + if (width == 4) { + /* assuming chips are in 16 bit mode */ + /* 2x16 */ + unsigned long cmd32 = (cmd << 16) | cmd; + + *(volatile unsigned long *) (addr + offset * 2) = cmd32; + } else { + /* 1x16 or 1x8 */ + *(volatile unsigned char *) (addr + offset) = cmd; + } +} + +static ulong +flash_get_size (int portwidth, vu_long * addr, flash_info_t * info) +{ + short i; + volatile unsigned char *caddr = (unsigned char *) addr; + volatile unsigned short *saddr = (unsigned short *) addr; + volatile unsigned long *laddr = (unsigned long *) addr; + char old[2], save; + ulong id = 0, manu = 0, base = (ulong) addr; + +#ifdef DEBUG + printf ("%s: enter\n", __FUNCTION__); +#endif + info->portwidth = portwidth; + + save = *caddr; + + flash_cmd (portwidth, caddr, 0, 0xf0); + flash_cmd (portwidth, caddr, 0, 0xf0); + + udelay (10); + + old[0] = caddr[0]; + old[1] = caddr[1]; + + + if (old[0] != 0xf0) { + flash_cmd (portwidth, caddr, 0, 0xf0); + flash_cmd (portwidth, caddr, 0, 0xf0); + + udelay (10); + + if (*caddr == 0xf0) { + /* this area is ROM */ + *caddr = save; + info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; + info->sector_count = 8; + info->size = 0x80000; + flash_get_offsets (base, info); + return info->size; + } + } else { + *caddr = 0; + + udelay (10); + + if (*caddr == 0) { + /* this area is RAM */ + *caddr = save; + info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN; + info->sector_count = 8; + info->size = 0x80000; + flash_get_offsets (base, info); + return info->size; + } + flash_cmd (portwidth, caddr, 0, 0xf0); + + udelay (10); + } + + /* Write auto select command: read Manufacturer ID */ + flash_cmd (portwidth, caddr, 0x555, 0xAA); + flash_cmd (portwidth, caddr, 0x2AA, 0x55); + flash_cmd (portwidth, caddr, 0x555, 0x90); + + udelay (10); + + if ((caddr[0] == old[0]) && (caddr[1] == old[1])) { + + /* this area is ROM */ + info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; + info->sector_count = 8; + info->size = 0x80000; + flash_get_offsets (base, info); + return info->size; +#ifdef DEBUG + } else { + printf ("%px%d: %02x:%02x -> %02x:%02x\n", + caddr, portwidth, old[0], old[1], caddr[0], caddr[1]); +#endif + } + + switch (portwidth) { + case 1: + manu = caddr[0]; + manu |= manu << 16; + id = caddr[1]; + break; + case 2: + manu = saddr[0]; + manu |= manu << 16; + id = saddr[1]; + id |= id << 16; + break; + case 4: + manu = laddr[0]; + id = laddr[1]; + break; + } + +#ifdef DEBUG + flash_cmd (portwidth, caddr, 0, 0xf0); + + printf ("\n%08lx:%08lx:%08lx\n", base, manu, id); + printf ("%08lx %08lx %08lx %08lx\n", + laddr[0], laddr[1], laddr[2], laddr[3]); +#endif + + switch (manu) { + case STM_MANUFACT: + info->flash_id = FLASH_MAN_STM; + break; + case AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + case FUJ_MANUFACT: + info->flash_id = FLASH_MAN_FUJ; + break; + case INTEL_MANUFACT: + info->flash_id = FLASH_MAN_INTEL; + break; + default: + flash_cmd (portwidth, caddr, 0, 0xf0); + + printf ("Unknown Mfr [%08lx]:%08lx\n", manu, id); + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + switch (id) { + case AMD_ID_LV400T: + info->flash_id += FLASH_AM400T; + info->sector_count = 11; + info->size = 0x00100000; + info->chipwidth = 1; + break; /* => 1 MB */ + + case AMD_ID_LV400B: + info->flash_id += FLASH_AM400B; + info->sector_count = 11; + info->size = 0x00100000; + info->chipwidth = 1; + break; /* => 1 MB */ + + case AMD_ID_LV800T: + info->flash_id += FLASH_AM800T; + info->sector_count = 19; + info->size = 0x00200000; + info->chipwidth = 1; + break; /* => 2 MB */ + + case AMD_ID_LV800B: + info->flash_id += FLASH_AM800B; + info->sector_count = 19; + info->size = 0x00200000; + info->chipwidth = 1; + break; /* => 2 MB */ + + case AMD_ID_LV160T: + info->flash_id += FLASH_AM160T; + info->sector_count = 35; + info->size = 0x00400000; + info->chipwidth = 1; + break; /* => 4 MB */ + + case AMD_ID_LV160B: + info->flash_id += FLASH_AM160B; + info->sector_count = 35; + info->size = 0x00400000; + info->chipwidth = 1; + break; /* => 4 MB */ +#if 0 /* enable when device IDs are available */ + case AMD_ID_LV320T: + info->flash_id += FLASH_AM320T; + info->sector_count = 67; + info->size = 0x00800000; + break; /* => 8 MB */ + + case AMD_ID_LV320B: + info->flash_id += FLASH_AM320B; + info->sector_count = 67; + info->size = 0x00800000; + break; /* => 8 MB */ +#endif + case AMD_ID_LV040B: + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x80000; + info->chipwidth = 1; + break; /* => 512 kB */ + + case INTEL_ID_28F640J3A: + info->flash_id += FLASH_28F640J3A; + info->sector_count = 64; + info->size = 128 * 1024 * 64; /* 128kbytes x 64 blocks */ + info->chipwidth = 2; + if (portwidth == 4) + info->size *= 2; /* 2x16 */ + break; + + case INTEL_ID_28F128J3A: + info->flash_id += FLASH_28F128J3A; + info->sector_count = 128; + info->size = 128 * 1024 * 128; /* 128kbytes x 128 blocks */ + info->chipwidth = 2; + if (portwidth == 4) + info->size *= 2; /* 2x16 */ + break; + + default: + flash_cmd (portwidth, caddr, 0, 0xf0); + + printf ("Unknown id %lx:[%lx]\n", manu, id); + info->flash_id = FLASH_UNKNOWN; + info->chipwidth = 1; + return (0); /* => no or unknown flash */ + + } + + flash_get_offsets (base, info); + + + /* check for protected sectors */ + for (i = 0; i < info->sector_count; i++) { + /* read sector protection at sector address, (A7 .. A0)=0x02 */ + /* D0 = 1 if protected */ + caddr = (volatile unsigned char *) (info->start[i]); + saddr = (volatile unsigned short *) (info->start[i]); + laddr = (volatile unsigned long *) (info->start[i]); + if (portwidth == 1) + info->protect[i] = caddr[2] & 1; + else if (portwidth == 2) + info->protect[i] = saddr[2] & 1; + else + info->protect[i] = laddr[2] & 1; + } + + /* + * Prevent writes to uninitialized FLASH. + */ + if (info->flash_id != FLASH_UNKNOWN) { + caddr = (volatile unsigned char *) info->start[0]; + + flash_cmd (portwidth, caddr, 0, 0xF0); /* reset bank */ + } + + return (info->size); +} + +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + volatile unsigned char *addr = (uchar *) (info->start[0]); + int flag, prot, sect, l_sect; + ulong start, now, last; + +/* modified to support 2x16 Intel flash */ +/* Note that the code will not exit on a flash erasure error or timeout */ +/* but will print and error message and continue processing sectors */ +/* until they are all erased. */ +/* 10-16-2002 P. Marchese */ + ulong mask; + int timeout; + + if (info->portwidth == 4) +/* { + printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); + return 1; + }*/ + { + /* make sure it's Intel flash */ + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { + /* yup! it's an Intel flash */ + /* is it 16-bits wide? */ + if (info->chipwidth == 2) { + /* yup! it's 16-bits wide */ + /* are there any sectors to process? */ + if ((s_first < 0) || (s_first > s_last)) { + printf ("Error: There are no sectors to erase\n"); + printf ("Either sector %d is less than zero\n", s_first); + printf ("or sector %d is greater than sector %d\n", s_first, s_last); + return 1; + } + /* check for protected sectors */ + prot = 0; + for (sect = s_first; sect <= s_last; ++sect) + if (info->protect[sect]) + prot++; + /* if variable "prot" is nonzero, there are protected sectors */ + if (prot) + printf ("- Warning: %d protected sectors will not be erased!\n", prot); + /* reset the flash */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RST); + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + /* Clear the status register */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_CLR_STAT); + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RST); + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + /* is the sector unprotected? */ + if (info->protect[sect] == 0) { /* not protected */ + /* issue the single block erase command, 0x20 */ + flash_cmd (info->portwidth, + (volatile unsigned + char *) info-> + start[sect], 0, + CHIP_CMD_ERASE1); + /* issue the erase confirm command, 0xD0 */ + flash_cmd (info->portwidth, + (volatile unsigned + char *) info-> + start[sect], 0, + CHIP_CMD_ERASE2); + l_sect = sect; + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + /* poll for erasure completion */ + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info->portwidth, + addr, 0, + CHIP_CMD_RD_STAT); + /* setup the status register mask */ + mask = CHIP_STAT_RDY | + (CHIP_STAT_RDY << 16); + /* init. the timeout counter */ + start = get_timer (0); + /* keep looping while the flash is not ready */ + /* exit the loop by timing out or the flash */ + /* becomes ready again */ + timeout = 0; + while ((* + (volatile unsigned + long *) info-> + start[sect] & mask) != + mask) { + /* has the timeout limit been reached? */ + if (get_timer (start) + > + CONFIG_SYS_FLASH_ERASE_TOUT) + { + /* timeout limit reached */ + printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]); + printf ("Continuing with next sector\n"); + timeout = 1; + goto timed_out_error; + } + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info-> + portwidth, + addr, 0, + CHIP_CMD_RD_STAT); + } + /* did we timeout? */ + timed_out_error:if (timeout == 0) + { + /* didn't timeout, so check the status register */ + /* create the status mask to check for errors */ + mask = CHIP_STAT_ECLBS; + mask = mask | (mask << + 16); + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info-> + portwidth, + addr, 0, + CHIP_CMD_RD_STAT); + /* are there any errors? */ + if ((* + (volatile + unsigned long *) + info-> + start[sect] & + mask) != 0) { + /* We got an erasure error */ + printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]); + printf ("Continuing with next sector\n"); + /* reset the flash */ + flash_cmd + (info-> + portwidth, + addr, + 0, + CHIP_CMD_RST); + } + } + /* erasure completed without errors */ + /* reset the flash */ + flash_cmd (info->portwidth, + addr, 0, + CHIP_CMD_RST); + } /* end if not protected */ + } /* end for loop */ + printf ("Flash erasure done\n"); + return 0; + } else { + /* The Intel flash is not 16-bit wide */ + /* print and error message and return */ + /* NOTE: you can add routines here to handle other size flash */ + printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8); + printf ("The erasure code only handles Intel 16-bit wide flash memory\n"); + return 1; + } + } else { + /* Not Intel flash so return an error as a write timeout */ + /* NOTE: if it's another type flash, stick its routine here */ + printf ("Error: The flash device is not Intel type\n"); + printf ("The erasure code only supports Intel flash in a 32-bit port width\n"); + return 1; + } + } + + /* end 32-bit wide flash code */ + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) + return 1; /* Rom can not be erased */ + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */ + for (sect = s_first; sect <= s_last; sect++) { + int sector_size = info->size / info->sector_count; + + addr = (uchar *) (info->start[sect]); + memset ((void *) addr, 0, sector_size); + } + return 0; + } + + 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_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */ + return flash_erase_intel (info, + (unsigned short) s_first, + (unsigned short) s_last); + } +#if 0 + if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */ + (info->flash_id > FLASH_AMD_COMP)) { + printf ("Can't erase unknown flash type %08lx - aborted\n", + info->flash_id); + return 1; + } +#endif + + 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; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */ + flash_cmd (info->portwidth, addr, 0x2AA, 0x55); + flash_cmd (info->portwidth, addr, 0x555, 0x80); + flash_cmd (info->portwidth, addr, 0x555, 0xAA); + flash_cmd (info->portwidth, addr, 0x2AA, 0x55); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + addr = (uchar *) (info->start[sect]); + flash_cmd (info->portwidth, addr, 0, 0x30); + 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 = (volatile unsigned char *) (info->start[l_sect]); + /* broken for 2x16: TODO */ + while ((addr[0] & 0x80) != 0x80) { + 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 */ + putc ('.'); + last = now; + } + } + + DONE: + /* reset to read mode */ + addr = (volatile unsigned char *) info->start[0]; + flash_cmd (info->portwidth, addr, 0, 0xf0); + flash_cmd (info->portwidth, addr, 0, 0xf0); + + printf (" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ + +/* broken for 2x16: TODO */ +int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + ulong cp, wp, data; + int i, l, rc; + +/* Commented out since the below code should work for 32-bit(2x 16 flash) */ +/* 10-16-2002 P. Marchese */ +/* if(info->portwidth==4) return 1; */ +/* if(info->portwidth==4) { + printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); + return 1; + }*/ + + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) + return 0; + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { + memcpy ((void *) addr, src, cnt); + return 0; + } + + 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 + */ +/* broken for 2x16: TODO */ +static int write_word (flash_info_t * info, ulong dest, ulong data) +{ + volatile unsigned char *addr = (uchar *) (info->start[0]); + ulong start; + int flag, i; + ulong mask; + +/* modified so that it handles 32-bit(2x16 Intel flash programming */ +/* 10-16-2002 P. Marchese */ + + if (info->portwidth == 4) +/* { + printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); + return 1; + }*/ + { + /* make sure it's Intel flash */ + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { + /* yup! it's an Intel flash */ + /* is it 16-bits wide? */ + if (info->chipwidth == 2) { + /* yup! it's 16-bits wide */ + /* so we know how to program it */ + /* reset the flash */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RST); + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + /* Clear the status register */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_CLR_STAT); + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RST); + /* 1st cycle of word/byte program */ + /* write 0x40 to the location to program */ + flash_cmd (info->portwidth, (uchar *) dest, 0, + CHIP_CMD_PROG); + /* 2nd cycle of word/byte program */ + /* write the data to the destination address */ + *(ulong *) dest = data; + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + /* setup the status register mask */ + mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16); + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RD_STAT); + /* init. the timeout counter */ + start = get_timer (0); + /* keep looping while the flash is not ready */ + /* exit the loop by timing out or the flash */ + /* becomes ready again */ +/* 11-13-2002 Paul Marchese */ +/* modified while loop conditional statement */ +/* because we were always timing out. */ +/* there is a type mismatch, "addr[0]" */ +/* returns a byte but "mask" is a 32-bit value */ + while ((*(volatile unsigned long *) info-> + start[0] & mask) != mask) +/* original code */ +/* while (addr[0] & mask) != mask) */ + { + /* has the timeout limit been reached? */ + if (get_timer (start) > + CONFIG_SYS_FLASH_WRITE_TOUT) { + /* timeout limit reached */ + printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data); + /* reset the flash */ + flash_cmd (info->portwidth, + addr, 0, + CHIP_CMD_RST); + return (1); + } + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RD_STAT); + } + /* flash is ready, so check the status */ + /* create the status mask to check for errors */ + mask = CHIP_STAT_DPS | CHIP_STAT_VPPS | + CHIP_STAT_PSLBS; + mask = mask | (mask << 16); + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RD_STAT); + /* are there any errors? */ + if ((addr[0] & mask) != 0) { + /* We got a one of the following errors: */ + /* Voltage range, Device protect, or programming */ + /* return the error as a device timeout */ + /* put flash into read status mode by writing 0x70 to it */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RD_STAT); + printf ("Flash programming error at address 0x%08lx\n", dest); + printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]); + /* reset the flash */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RST); + return 1; + } + /* write completed without errors */ + /* reset the flash */ + flash_cmd (info->portwidth, addr, 0, + CHIP_CMD_RST); + return 0; + } else { + /* it's not 16-bits wide, so return an error as a write timeout */ + /* NOTE: you can add routines here to handle other size flash */ + printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8); + printf ("The write code only handles Intel 16-bit wide flash memory\n"); + return 1; + } + } else { + /* not Intel flash so return an error as a write timeout */ + /* NOTE: if it's another type flash, stick its routine here */ + printf ("Error: The flash device is not Intel type\n"); + printf ("The code only supports Intel flash in a 32-bit port width\n"); + return 1; + } + } + + /* end of 32-bit flash code */ + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) + return 1; + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { + *(unsigned long *) dest = data; + return 0; + } + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { + unsigned short low = data & 0xffff; + unsigned short hi = (data >> 16) & 0xffff; + int ret = write_word_intel ((bank_addr_t) dest, hi); + + if (!ret) + ret = write_word_intel ((bank_addr_t) (dest + 2), + low); + + return ret; + } + + /* Check if Flash is (sufficiently) erased */ + if ((*((vu_long *) dest) & data) != data) { + return (2); + } + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + /* first, perform an unlock bypass command to speed up flash writes */ + addr[0x555] = 0xAA; + addr[0x2AA] = 0x55; + addr[0x555] = 0x20; + + /* write each byte out */ + for (i = 0; i < 4; i++) { + char *data_ch = (char *) &data; + + addr[0] = 0xA0; + *(((char *) dest) + i) = data_ch[i]; + udelay (10); /* XXX */ + } + + /* we're done, now do an unlock bypass reset */ + addr[0] = 0x90; + addr[0] = 0x00; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* data polling for D7 */ + start = get_timer (0); + while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080)) { + if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { + return (1); + } + } + return (0); +} |
