- erase bank using bank erase rather than each sector

- Thanks Fredrik Hederstierna

git-svn-id: svn://svn.berlios.de/openocd/trunk@704 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/flash/str9x.c b/src/flash/str9x.c
index 96cad3992ac1cfe7b7e5b975ff86375a22f47316..fbae6c688e35a43e5830dd5df3097d3534c7a8a0 100644 (file)
--- a/src/flash/str9x.c
+++ b/src/flash/str9x.c
@@ -236,18 +236,31 @@ int str9x_erase(struct flash_bank_s *bank, int first, int last)
        int i;
        u32 adr;
        u8 status;
+       u8 erase_cmd;
        
        if (bank->target->state != TARGET_HALTED)
        {
                return ERROR_TARGET_NOT_HALTED;
        }
 
+       /* Check if we erase whole bank */
+       if ((first == 0) && (last == (bank->num_sectors - 1)))
+       {
+               /* Optimize to run erase bank command instead of sector */
+               erase_cmd = 0x80;
+       }
+       else
+       {
+               /* Erase sector command */
+               erase_cmd = 0x20;
+       }
+       
        for (i = first; i <= last; i++)
        {
                adr = bank->base + bank->sectors[i].offset;
                
                /* erase sectors */
-               target_write_u16(target, adr, 0x20);
+               target_write_u16(target, adr, erase_cmd);
                target_write_u16(target, adr, 0xD0);
                
                /* get status */
@@ -271,6 +284,10 @@ int str9x_erase(struct flash_bank_s *bank, int first, int last)
                        LOG_ERROR("error erasing flash bank, status: 0x%x", status);
                        return ERROR_FLASH_OPERATION_FAILED;
                }
+               
+               /* If we ran erase bank command, we are finished */
+               if (erase_cmd == 0x80)
+                       break;
        }
        
        for (i = first; i <= last; i++)