1 | /* versions.c |
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2 | * |
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3 | * Milkymist versioning driver for RTEMS |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.org/license/LICENSE. |
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8 | * |
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9 | * COPYRIGHT (c) 2010, 2011 Sebastien Bourdeauducq |
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10 | */ |
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11 | |
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12 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
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13 | |
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14 | #include <stdio.h> |
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15 | #include <stdlib.h> |
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16 | #include <string.h> |
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17 | #include <sys/types.h> |
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18 | #include <rtems.h> |
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19 | #include <rtems/status-checks.h> |
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20 | #include <bsp.h> |
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21 | #include <rtems/libio.h> |
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22 | #include "../include/system_conf.h" |
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23 | #include <bsp/milkymist_versions.h> |
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24 | |
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25 | #define SOC_DEVICE_NAME "/dev/soc" |
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26 | #define PCB_DEVICE_NAME "/dev/pcb" |
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27 | #define PCBREV_DEVICE_NAME "/dev/pcb_rev" |
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28 | |
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29 | rtems_device_driver versions_initialize( |
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30 | rtems_device_major_number major, |
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31 | rtems_device_minor_number minor, |
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32 | void *arg |
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33 | ) |
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34 | { |
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35 | rtems_status_code sc; |
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36 | |
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37 | sc = rtems_io_register_name(SOC_DEVICE_NAME, major, 0); |
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38 | RTEMS_CHECK_SC(sc, "create SoC version device"); |
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39 | sc = rtems_io_register_name(PCB_DEVICE_NAME, major, 1); |
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40 | RTEMS_CHECK_SC(sc, "create PCB type device"); |
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41 | sc = rtems_io_register_name(PCBREV_DEVICE_NAME, major, 2); |
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42 | RTEMS_CHECK_SC(sc, "create PCB revision device"); |
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43 | |
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44 | return RTEMS_SUCCESSFUL; |
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45 | } |
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46 | |
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47 | static int get_soc_version(char *buffer) |
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48 | { |
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49 | char fmt[13]; |
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50 | char *version; |
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51 | int len; |
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52 | unsigned int id; |
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53 | unsigned int major, minor, subminor, rc; |
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54 | |
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55 | id = MM_READ(MM_SYSTEM_ID); |
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56 | major = (id & 0xf0000000) >> 28; |
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57 | minor = (id & 0x0f000000) >> 24; |
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58 | subminor = (id & 0x00f00000) >> 20; |
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59 | rc = (id & 0x000f0000) >> 16; |
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60 | |
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61 | version = fmt; |
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62 | version += sprintf(version, "%u.%u", major, minor); |
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63 | if (subminor != 0) |
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64 | version += sprintf(version, ".%u", subminor); |
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65 | if (rc != 0) |
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66 | version += sprintf(version, "RC%u", rc); |
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67 | |
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68 | len = version - fmt; |
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69 | memcpy(buffer, fmt, len); |
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70 | return len; |
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71 | } |
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72 | |
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73 | static int get_pcb_type(char *buffer) |
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74 | { |
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75 | unsigned int id; |
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76 | |
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77 | id = MM_READ(MM_SYSTEM_ID); |
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78 | buffer[0] = (id & 0x0000ff00) >> 8; |
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79 | buffer[1] = id & 0x000000ff; |
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80 | return 2; |
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81 | } |
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82 | |
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83 | static int get_pcb_revision(char *buffer) |
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84 | { |
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85 | unsigned int v; |
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86 | |
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87 | v = MM_READ(MM_GPIO_IN); |
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88 | v = (v & 0x78) >> 3; |
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89 | buffer[0] = '0' + v; |
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90 | return 1; |
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91 | } |
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92 | |
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93 | rtems_device_driver versions_read( |
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94 | rtems_device_major_number major, |
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95 | rtems_device_minor_number minor, |
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96 | void *arg |
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97 | ) |
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98 | { |
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99 | rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; |
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100 | |
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101 | if(rw_args->offset != 0) { |
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102 | rw_args->bytes_moved = 0; |
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103 | return RTEMS_SUCCESSFUL; |
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104 | } |
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105 | |
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106 | switch (minor) { |
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107 | case 0: |
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108 | if (rw_args->count < 12) { |
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109 | rw_args->bytes_moved = 0; |
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110 | return RTEMS_UNSATISFIED; |
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111 | } |
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112 | rw_args->bytes_moved = get_soc_version((char *)rw_args->buffer); |
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113 | return RTEMS_SUCCESSFUL; |
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114 | case 1: |
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115 | if (rw_args->count < 2) { |
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116 | rw_args->bytes_moved = 0; |
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117 | return RTEMS_UNSATISFIED; |
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118 | } |
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119 | rw_args->bytes_moved = get_pcb_type((char *)rw_args->buffer); |
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120 | return RTEMS_SUCCESSFUL; |
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121 | case 2: |
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122 | if (rw_args->count < 1) { |
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123 | rw_args->bytes_moved = 0; |
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124 | return RTEMS_UNSATISFIED; |
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125 | } |
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126 | rw_args->bytes_moved = get_pcb_revision((char *)rw_args->buffer); |
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127 | return RTEMS_SUCCESSFUL; |
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128 | } |
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129 | |
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130 | rw_args->bytes_moved = 0; |
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131 | return RTEMS_UNSATISFIED; |
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132 | } |
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