diff options
Diffstat (limited to 'board/sl8245/flash.c')
| -rw-r--r-- | board/sl8245/flash.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/board/sl8245/flash.c b/board/sl8245/flash.c new file mode 100644 index 0000000..553dc98 --- /dev/null +++ b/board/sl8245/flash.c @@ -0,0 +1,488 @@ +/* + * (C) Copyright 2001 - 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.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> +#include <mpc824x.h> +#include <asm/processor.h> + +#if defined(CFG_ENV_IS_IN_FLASH) +# ifndef CFG_ENV_ADDR +# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) +# endif +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif +# ifndef CFG_ENV_SECT_SIZE +# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE +# endif +#endif + +#define FLASH_BANK_SIZE 0x800000 +#define MAIN_SECT_SIZE 0x40000 +#define PARAM_SECT1_SIZE 0x20000 +#define PARAM_SECT23_SIZE 0x8000 +#define PARAM_SECT4_SIZE 0x10000 + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + +static int write_data (flash_info_t *info, ulong dest, ulong *data); +static void write_via_fpu(vu_long *addr, ulong *data); +static __inline__ unsigned long get_msr(void); +static __inline__ void set_msr(unsigned long msr); + +/*---------------------------------------------------------------------*/ +#undef DEBUG_FLASH + +/*---------------------------------------------------------------------*/ +#ifdef DEBUG_FLASH +#define DEBUGF(fmt,args...) printf(fmt ,##args) +#else +#define DEBUGF(fmt,args...) +#endif +/*---------------------------------------------------------------------*/ + +#define __align__ __attribute__ ((aligned (8))) +static __align__ ulong precmd0[2] = { 0x00aa00aa, 0x00aa00aa }; +static __align__ ulong precmd1[2] = { 0x00550055, 0x00550055 }; +static __align__ ulong cmdid[2] = { 0x00900090, 0x00900090 }; +static __align__ ulong cmderase[2] = { 0x00800080, 0x00800080 }; +static __align__ ulong cmdersusp[2] = { 0x00b000b0, 0x00b000b0 }; +static __align__ ulong cmdsecter[2] = { 0x00300030, 0x00300030 }; +static __align__ ulong cmdprog[2] = { 0x00a000a0, 0x00a000a0 }; +static __align__ ulong cmdres[2] = { 0x00f000f0, 0x00f000f0 }; + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init (void) +{ + int i, j; + ulong size = 0; + + for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { + vu_long *addr = (vu_long *) (CFG_FLASH_BASE + i * FLASH_BANK_SIZE); + + write_via_fpu (&addr[0xaaa], precmd0); + write_via_fpu (&addr[0x554], precmd1); + write_via_fpu (&addr[0xaaa], cmdid); + + DEBUGF ("Flash bank # %d:\n" + "\tManuf. ID @ 0x%08lX: 0x%08lX\n" + "\tDevice ID @ 0x%08lX: 0x%08lX\n", + i, + (ulong) (&addr[0]), addr[0], + (ulong) (&addr[2]), addr[2]); + + if ((addr[0] == addr[1]) && (addr[0] == AMD_MANUFACT) && + (addr[2] == addr[3]) && (addr[2] == AMD_ID_LV160T)) { + flash_info[i].flash_id = (FLASH_MAN_AMD & FLASH_VENDMASK) | + (FLASH_AM160T & FLASH_TYPEMASK); + } else { + flash_info[i].flash_id = FLASH_UNKNOWN; + write_via_fpu (addr, cmdres); + goto Done; + } + + DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id); + + write_via_fpu (addr, cmdres); + + 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); + for (j = 0; j < 32; j++) { + flash_info[i].start[j] = CFG_FLASH_BASE + + i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE; + } + flash_info[i].start[32] = + flash_info[i].start[31] + PARAM_SECT1_SIZE; + flash_info[i].start[33] = + flash_info[i].start[32] + PARAM_SECT23_SIZE; + flash_info[i].start[34] = + flash_info[i].start[33] + PARAM_SECT23_SIZE; + size += flash_info[i].size; + } + + /* Protect monitor and environment sectors + */ +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + FLASH_BANK_SIZE + flash_protect ( FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE + monitor_flash_len - 1, + &flash_info[1]); +#else + flash_protect ( FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE + monitor_flash_len - 1, + &flash_info[0]); +#endif +#endif + +#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) +#if CFG_ENV_ADDR >= CFG_FLASH_BASE + FLASH_BANK_SIZE + flash_protect ( FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[1]); +#else + flash_protect ( FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); +#endif +#endif + +Done: + return size; +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t * info) +{ + int i; + + switch ((i = info->flash_id & FLASH_VENDMASK)) { + case (FLASH_MAN_AMD & FLASH_VENDMASK): + printf ("Intel: "); + break; + default: + printf ("Unknown Vendor 0x%04x ", i); + break; + } + + switch ((i = info->flash_id & FLASH_TYPEMASK)) { + case (FLASH_AM160T & FLASH_TYPEMASK): + printf ("AM29LV160BT (16Mbit)\n"); + break; + default: + printf ("Unknown Chip Type 0x%04x\n", i); + 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; +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + int flag, prot, sect; + ulong start, now, last; + + DEBUGF ("Erase flash bank %d sect %d ... %d\n", + info - &flash_info[0], s_first, s_last); + + 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_AMD & FLASH_VENDMASK)) { + printf ("Can erase only AMD flash types - 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 = get_timer (0); + last = start; + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + vu_long *addr = (vu_long *) (info->start[sect]); + + DEBUGF ("Erase sect %d @ 0x%08lX\n", sect, (ulong) addr); + + /* Disable interrupts which might cause a timeout + * here. + */ + flag = disable_interrupts (); + + write_via_fpu (&addr[0xaaa], precmd0); + write_via_fpu (&addr[0x554], precmd1); + write_via_fpu (&addr[0xaaa], cmderase); + write_via_fpu (&addr[0xaaa], precmd0); + write_via_fpu (&addr[0x554], precmd1); + write_via_fpu (&addr[0xaaa], cmdsecter); + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + + while (((addr[0] & 0x00800080) != 0x00800080) || + ((addr[1] & 0x00800080) != 0x00800080)) { + if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + write_via_fpu (addr, cmdersusp); + write_via_fpu (addr, cmdres); + return 1; + } + + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc ('.'); + last = now; + } + } + + write_via_fpu (addr, cmdres); + } + } + printf (" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + * 4 - Flash not identified + */ + +#define FLASH_WIDTH 8 /* flash bus width in bytes */ + +int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + ulong wp, cp, msr; + int l, rc, i; + ulong data[2]; + ulong *datah = &data[0]; + ulong *datal = &data[1]; + + DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n", + addr, (ulong) src, cnt); + + if (info->flash_id == FLASH_UNKNOWN) { + return 4; + } + + msr = get_msr (); + set_msr (msr | MSR_FP); + + wp = (addr & ~(FLASH_WIDTH - 1)); /* get lower aligned address */ + + /* + * handle unaligned start bytes + */ + if ((l = addr - wp) != 0) { + *datah = *datal = 0; + + for (i = 0, cp = wp; i < l; i++, cp++) { + if (i >= 4) { + *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); + } + + *datal = (*datal << 8) | (*(uchar *) cp); + } + for (; i < FLASH_WIDTH && cnt > 0; ++i) { + char tmp; + + tmp = *src; + + src++; + + if (i >= 4) { + *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); + } + + *datal = (*datal << 8) | tmp; + + --cnt; + ++cp; + } + + for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) { + if (i >= 4) { + *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); + } + + *datal = (*datah << 8) | (*(uchar *) cp); + } + + if ((rc = write_data (info, wp, data)) != 0) { + set_msr (msr); + return (rc); + } + + wp += FLASH_WIDTH; + } + + /* + * handle FLASH_WIDTH aligned part + */ + while (cnt >= FLASH_WIDTH) { + *datah = *(ulong *) src; + *datal = *(ulong *) (src + 4); + if ((rc = write_data (info, wp, data)) != 0) { + set_msr (msr); + return (rc); + } + wp += FLASH_WIDTH; + cnt -= FLASH_WIDTH; + src += FLASH_WIDTH; + } + + if (cnt == 0) { + set_msr (msr); + return (0); + } + + /* + * handle unaligned tail bytes + */ + *datah = *datal = 0; + for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) { + char tmp; + + tmp = *src; + + src++; + + if (i >= 4) { + *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); + } + + *datal = (*datal << 8) | tmp; + + --cnt; + } + + for (; i < FLASH_WIDTH; ++i, ++cp) { + if (i >= 4) { + *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24); + } + + *datal = (*datal << 8) | (*(uchar *) cp); + } + + rc = write_data (info, wp, data); + set_msr (msr); + + return (rc); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_data (flash_info_t * info, ulong dest, ulong * data) +{ + vu_long *chip = (vu_long *) (info->start[0]); + vu_long *addr = (vu_long *) dest; + ulong start; + int flag; + + /* Check if Flash is (sufficiently) erased */ + if (((addr[0] & data[0]) != data[0]) || + ((addr[1] & data[1]) != data[1])) { + return (2); + } + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + write_via_fpu (&chip[0xaaa], precmd0); + write_via_fpu (&chip[0x554], precmd1); + write_via_fpu (&chip[0xaaa], cmdprog); + write_via_fpu (addr, data); + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + start = get_timer (0); + + while (((addr[0] & 0x00800080) != (data[0] & 0x00800080)) || + ((addr[1] & 0x00800080) != (data[1] & 0x00800080))) { + if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { + write_via_fpu (chip, cmdres); + return (1); + } + } + + write_via_fpu (chip, cmdres); + + return (0); +} + +/*----------------------------------------------------------------------- + */ +static void write_via_fpu (vu_long * addr, ulong * data) +{ + __asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data)); + __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr)); +} + +/*----------------------------------------------------------------------- + */ +static __inline__ unsigned long get_msr (void) +{ + unsigned long msr; + + __asm__ __volatile__ ("mfmsr %0":"=r" (msr):); + + return msr; +} + +static __inline__ void set_msr (unsigned long msr) +{ + __asm__ __volatile__ ("mtmsr %0"::"r" (msr)); +} |