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-rw-r--r--board/modnet50/flash.c536
1 files changed, 536 insertions, 0 deletions
diff --git a/board/modnet50/flash.c b/board/modnet50/flash.c
new file mode 100644
index 000000000..fc04d9124
--- /dev/null
+++ b/board/modnet50/flash.c
@@ -0,0 +1,536 @@
+/*
+ * (C) Copyright 2002
+ * MAZeT GmbH <www.mazet.de>
+ * Stephan Linz <linz@mazet.de>, <linz@li-pro.net>
+ *
+ * The most stuff comes from PPCBoot and Linux.
+ *
+ * IMMS gGmbH <www.imms.de>
+ * Thomas Elste <info@elste.org>
+ *
+ * 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 <common.h>
+#include <asm/arch/netarm_registers.h>
+
+#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[CFG_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 = CFG_MAX_FLASH_SECT;
+ info->size = CFG_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 * CFG_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 < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* Static FLASH Bank configuration here (only one bank) */
+ size = flash_get_size (CFG_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,
+ CFG_FLASH_BASE,
+ CFG_FLASH_BASE + monitor_flash_len - 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;
+
+ 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 () > CFG_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 () > CFG_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);
+}
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