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1 #ifndef CYGONCE_IO_DEVTAB_H |
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2 #define CYGONCE_IO_DEVTAB_H |
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3 // ==================================================================== |
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4 // |
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5 // devtab.h |
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6 // |
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7 // Device I/O Table |
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8 // |
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9 // ==================================================================== |
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10 //####COPYRIGHTBEGIN#### |
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11 // |
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12 // ------------------------------------------- |
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13 // The contents of this file are subject to the Cygnus eCos Public License |
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14 // Version 1.0 (the "License"); you may not use this file except in |
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15 // compliance with the License. You may obtain a copy of the License at |
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16 // http://sourceware.cygnus.com/ecos |
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17 // |
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18 // Software distributed under the License is distributed on an "AS IS" |
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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20 // License for the specific language governing rights and limitations under |
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21 // the License. |
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22 // |
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23 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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24 // September 30, 1998. |
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25 // |
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26 // The Initial Developer of the Original Code is Cygnus. Portions created |
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27 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
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30 //####COPYRIGHTEND#### |
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31 // ==================================================================== |
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32 //#####DESCRIPTIONBEGIN#### |
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33 // |
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34 // Author(s): gthomas |
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35 // Contributors: gthomas |
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36 // Date: 1999-02-04 |
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37 // Purpose: Describe low level I/O interfaces. |
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38 // Description: |
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39 // |
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40 //####DESCRIPTIONEND#### |
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41 // |
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42 // ==================================================================== |
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43 |
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44 // Private include file. This file should only be used by device |
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45 // drivers, not application code. |
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46 |
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47 #include <pkgconf/system.h> |
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48 #include <cyg/io/io.h> |
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49 #include <cyg/hal/drv_api.h> |
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50 |
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51 // Set of functions which handle top level I/O functions |
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52 typedef struct { |
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53 Cyg_ErrNo (*write)(cyg_io_handle_t handle, |
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54 const void *buf, |
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55 cyg_uint32 *len); |
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56 Cyg_ErrNo (*read)(cyg_io_handle_t handle, |
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57 void *buf, |
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58 cyg_uint32 *len); |
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59 Cyg_ErrNo (*get_config)(cyg_io_handle_t handle, |
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60 cyg_uint32 key, |
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61 void *buf, |
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62 cyg_uint32 *len); |
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63 Cyg_ErrNo (*set_config)(cyg_io_handle_t handle, |
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64 cyg_uint32 key, |
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65 const void *buf, |
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66 cyg_uint32 *len); |
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67 } cyg_devio_table_t; |
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68 |
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69 #define DEVIO_TABLE(_l,_write,_read,_get_config,_set_config) \ |
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70 cyg_devio_table_t _l = { \ |
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71 _write, \ |
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72 _read, \ |
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73 _get_config, \ |
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74 _set_config, \ |
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75 }; |
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76 |
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77 typedef struct cyg_devtab_entry { |
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78 const char *name; |
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79 const char *dep_name; |
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80 cyg_devio_table_t *handlers; |
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81 bool (*init)(struct cyg_devtab_entry *tab); |
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82 Cyg_ErrNo (*lookup)(struct cyg_devtab_entry **tab, |
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83 struct cyg_devtab_entry *sub_tab, |
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84 const char *name); |
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85 void *priv; |
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86 unsigned long status; |
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87 } cyg_devtab_entry_t; |
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88 |
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89 #define CYG_DEVTAB_STATUS_AVAIL 0x0001 |
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90 |
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91 extern cyg_devtab_entry_t __DEVTAB__[], __DEVTAB_END__; |
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92 |
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93 #define DEVTAB_ENTRY(_l,_name,_dep_name,_handlers,_init,_lookup,_priv) \ |
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94 cyg_devtab_entry_t _l __attribute__ ((section(".devtab"))) = { \ |
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95 _name, \ |
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96 _dep_name, \ |
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97 _handlers, \ |
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98 _init, \ |
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99 _lookup, \ |
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100 _priv \ |
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101 }; |
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102 |
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103 #define DEVTAB_ENTRY_NO_INIT(_l,_name,_dep_name,_handlers,_init,_lookup,_priv) \ |
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104 cyg_devtab_entry_t _l = { \ |
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105 _name, \ |
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106 _dep_name, \ |
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107 _handlers, \ |
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108 _init, \ |
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109 _lookup, \ |
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110 _priv \ |
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111 }; |
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112 |
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113 #endif // CYGONCE_IO_DEVTAB_H |
