diff packages/devs/flash/intel/strata/current/src/flash_program_buf.c @ 156:b939e9cada46

Merge from eCos master repository on 2001-03-29-21:44:39-BST
author jlarmour
date Fri, 06 Apr 2001 17:20:13 +0000
parents
children 0d2b193a635f
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new file mode 100644
--- /dev/null
+++ b/packages/devs/flash/intel/strata/current/src/flash_program_buf.c
@@ -0,0 +1,142 @@
+//==========================================================================
+//
+//      flash_program_buf.c
+//
+//      Flash programming
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    gthomas, hmt
+// Contributors: gthomas
+// Date:         2001-02-14
+// Purpose:      
+// Description:  
+//              
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include "strata.h"
+
+#include <pkgconf/hal.h>
+#include <cyg/hal/hal_arch.h>
+#include <cyg/hal/hal_cache.h>
+
+//
+// CAUTION!  This code must be copied to RAM before execution.  Therefore,
+// it must not contain any code which might be position dependent!
+//
+
+int
+flash_program_buf(volatile flash_t *addr, flash_t *data, int len,
+                  unsigned long block_mask, int buffer_size)
+{
+    volatile flash_t *ROM;
+    volatile flash_t *BA;
+    flash_t stat = 0;
+    int timeout = 50000;
+    int cache_on;
+#ifdef FLASH_Write_Buffer
+    int i, wc;
+#endif
+
+    HAL_DCACHE_IS_ENABLED(cache_on);
+    if (cache_on) {
+        HAL_DCACHE_SYNC();
+        HAL_DCACHE_DISABLE();
+    }
+
+    // Get base address and map addresses to virtual addresses
+    ROM = FLASH_P2V( CYGNUM_FLASH_BASE_MASK & (unsigned int)addr );
+    BA = FLASH_P2V( block_mask & (unsigned int)addr );
+    addr = FLASH_P2V(addr);
+
+    // Clear any error conditions
+    ROM[0] = FLASH_Clear_Status;
+
+#ifdef FLASH_Write_Buffer
+    // Write any big chunks first
+    while (len >= buffer_size) {
+        wc = buffer_size;
+        if (wc > len) wc = len;
+        len -= wc;
+        wc = wc / (CYGNUM_FLASH_DEVICES*2);  // Word count
+        *BA = FLASH_Write_Buffer;
+        timeout = 5000000;
+        while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
+            if (--timeout == 0) {
+                goto bad;
+            }
+            *BA = FLASH_Write_Buffer;
+        }
+        *BA = FLASHWORD(wc-1);  // Count is 0..N-1
+        for (i = 0;  i < wc;  i++) {
+            *addr++ = *data++;
+        }
+        *BA = FLASH_Confirm;
+    
+        ROM[0] = FLASH_Read_Status;
+        timeout = 5000000;
+        while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
+            if (--timeout == 0) {
+                goto bad;
+            }
+        }
+    }
+#endif
+
+    while (len > 0) {
+        ROM[0] = FLASH_Program;
+        *addr = *data;
+        timeout = 5000000;
+        while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
+            if (--timeout == 0) {
+                goto bad;
+            }
+        }
+        if (stat & FLASH_ErrorMask) {
+            break;
+        }
+        ROM[0] = FLASH_Reset;            
+        if (*addr++ != *data++) {
+            stat = FLASH_ErrorNotVerified;
+            break;
+        }
+        len -= sizeof( flash_t );
+    }
+
+    // Restore ROM to "normal" mode
+ bad:
+    ROM[0] = FLASH_Reset;            
+
+    if (cache_on) {
+        HAL_DCACHE_ENABLE();
+    }
+
+    return stat;
+}