Mercurial > flash_v2

annotate packages/devs/flash/intel/strata/current/src/flash_query.c @ 903:59e96106029e

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* src/flash_lock_block.c (flash_lock_block): * src/flash_unlock_block.c (flash_unlock_block): * src/flash_erase_block.c (flash_erase_block): * src/flash_query.c (flash_query): * src/flash_program_buf.c (flash_program_buf): Cache enabling and disabling are already handled by generic flash
author jlarmour
date Fri, 04 Apr 2003 04:23:53 +0000
parents d2c90368aeef
children b33e882f6b64
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1 //==========================================================================
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2 //
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3 // flash_query.c
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4 //
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5 // Flash programming - query device
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6 //
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7 //==========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
156
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas, hmt
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44 // Contributors: gthomas
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45 // Date: 2001-02-14
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46 // Purpose:
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47 // Description:
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48 //
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49 //####DESCRIPTIONEND####
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50 //
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51 //==========================================================================
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52
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53 #include "strata.h"
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54
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55 #include <pkgconf/hal.h>
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56 #include <cyg/hal/hal_arch.h>
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57 #include CYGHWR_MEMORY_LAYOUT_H
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58
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59 //
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60 // CAUTION! This code must be copied to RAM before execution. Therefore,
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61 // it must not contain any code which might be position dependent!
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62 //
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63
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64 #define CNT 20*1000*10 // Approx 20ms
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65
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66 int
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67 flash_query(unsigned char *data)
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68 {
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69 volatile flash_t *ROM;
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70 int i, cnt;
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71
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72 // Get base address and map addresses to virtual addresses
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73 ROM = FLASH_P2V( CYGNUM_FLASH_BASE );
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74 #ifdef CYGOPT_FLASH_IS_BOOTBLOCK
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75 // BootBlock flash does not support full Read_Query - we have do a
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76 // table oriented thing above, after getting just two bytes of results:
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77 ROM[0] = FLASH_Read_ID;
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78 i = 2;
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79 #else
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80 // StrataFlash supports the full Read_Query op:
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81 ROM[0] = FLASH_Read_Query;
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82 i = sizeof(struct FLASH_query);
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83 #endif // Not CYGOPT_FLASH_IS_BOOTBLOCK
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84
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85 for (cnt = CNT; cnt > 0; cnt--) ;
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86 for ( /* i */; i > 0; i-- ) {
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87 // It is very deliberate that data is chars NOT flash_t:
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88 // The info comes out in bytes regardless of device.
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89 *data++ = (unsigned char) (*ROM++);
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90 #ifndef CYGOPT_FLASH_IS_BOOTBLOCK
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91 # if 8 == CYGNUM_FLASH_WIDTH
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92 // strata flash with 'byte-enable' contains the configuration data
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93 // at even addresses
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94 ++ROM;
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95 # endif
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96 #endif
156
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97 }
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98 ROM[0] = FLASH_Reset;
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99
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100 return 0;
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101 }