1 | /* usbinput.c |
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2 | * |
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3 | * Milkymist USB input devices 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.com/license/LICENSE. |
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8 | * |
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9 | * $Id$ |
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10 | * |
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11 | * COPYRIGHT (c) 2010, 2011 Sebastien Bourdeauducq |
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12 | */ |
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13 | |
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14 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
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15 | |
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16 | #include <stdlib.h> |
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17 | #include <stdio.h> |
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18 | #include <errno.h> |
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19 | #include <sys/types.h> |
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20 | #include <rtems.h> |
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21 | #include <bsp.h> |
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22 | #include <bsp/irq-generic.h> |
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23 | #include <rtems/libio.h> |
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24 | #include <rtems/status-checks.h> |
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25 | #include "../include/system_conf.h" |
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26 | #include "milkymist_usbinput.h" |
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27 | |
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28 | static const unsigned char input_firmware[] = { |
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29 | #include "softusb-input.h" |
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30 | }; |
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31 | |
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32 | #include "comloc.h" |
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33 | |
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34 | #define DEVICE_NAME "/dev/usbinput" |
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35 | |
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36 | static int mouse_consume; |
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37 | static int keyboard_consume; |
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38 | static int midi_consume; |
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39 | |
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40 | static rtems_id event_q; |
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41 | |
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42 | static rtems_isr interrupt_handler(rtems_vector_number n) |
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43 | { |
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44 | unsigned char msg[8]; |
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45 | int i; |
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46 | |
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47 | lm32_interrupt_ack(1 << MM_IRQ_USB); |
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48 | |
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49 | while(mouse_consume != COMLOC_MEVT_PRODUCE) { |
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50 | for(i=0;i<4;i++) |
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51 | msg[i] = COMLOC_MEVT(4*mouse_consume+i); |
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52 | rtems_message_queue_send(event_q, msg, 4); |
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53 | mouse_consume = (mouse_consume + 1) & 0x0f; |
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54 | } |
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55 | |
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56 | while(keyboard_consume != COMLOC_KEVT_PRODUCE) { |
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57 | for(i=0;i<8;i++) |
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58 | msg[i] = COMLOC_KEVT(8*keyboard_consume+i); |
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59 | rtems_message_queue_send(event_q, msg, 8); |
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60 | keyboard_consume = (keyboard_consume + 1) & 0x07; |
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61 | } |
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62 | |
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63 | while(midi_consume != COMLOC_MIDI_PRODUCE) { |
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64 | for(i=0;i<3;i++) |
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65 | msg[i] = COMLOC_MIDI(4*midi_consume+i+1); |
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66 | rtems_message_queue_send(event_q, msg, 3); |
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67 | midi_consume = (midi_consume + 1) & 0x0f; |
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68 | } |
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69 | |
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70 | } |
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71 | |
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72 | rtems_device_driver usbinput_initialize( |
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73 | rtems_device_major_number major, |
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74 | rtems_device_minor_number minor, |
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75 | void *arg |
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76 | ) |
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77 | { |
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78 | rtems_status_code sc; |
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79 | volatile unsigned int *usb_dmem |
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80 | = (volatile unsigned int *)MM_SOFTUSB_DMEM_BASE; |
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81 | volatile unsigned int *usb_pmem |
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82 | = (volatile unsigned int *)MM_SOFTUSB_PMEM_BASE; |
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83 | int i, nwords; |
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84 | rtems_isr_entry dummy; |
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85 | |
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86 | MM_WRITE(MM_SOFTUSB_CONTROL, SOFTUSB_CONTROL_RESET); |
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87 | for(i=0;i<SOFTUSB_DMEM_SIZE/4;i++) |
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88 | usb_dmem[i] = 0; |
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89 | for(i=0;i<SOFTUSB_PMEM_SIZE/2;i++) |
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90 | usb_pmem[i] = 0; |
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91 | nwords = (sizeof(input_firmware)+1)/2; |
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92 | for(i=0;i<nwords;i++) |
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93 | usb_pmem[i] = ((unsigned int)(input_firmware[2*i])) |
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94 | |((unsigned int)(input_firmware[2*i+1]) << 8); |
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95 | MM_WRITE(MM_SOFTUSB_CONTROL, 0); |
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96 | |
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97 | mouse_consume = 0; |
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98 | keyboard_consume = 0; |
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99 | midi_consume = 0; |
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100 | |
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101 | sc = rtems_io_register_name(DEVICE_NAME, major, 0); |
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102 | RTEMS_CHECK_SC(sc, "create USB input device"); |
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103 | |
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104 | sc = rtems_message_queue_create( |
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105 | rtems_build_name('U', 'S', 'B', 'I'), |
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106 | 64, |
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107 | 8, |
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108 | 0, |
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109 | &event_q |
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110 | ); |
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111 | RTEMS_CHECK_SC(sc, "create USB event queue"); |
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112 | |
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113 | rtems_interrupt_catch(interrupt_handler, MM_IRQ_USB, &dummy); |
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114 | bsp_interrupt_vector_enable(MM_IRQ_USB); |
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115 | |
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116 | return RTEMS_SUCCESSFUL; |
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117 | } |
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118 | |
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119 | rtems_device_driver usbinput_open( |
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120 | rtems_device_major_number major, |
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121 | rtems_device_minor_number minor, |
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122 | void *arg |
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123 | ) |
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124 | { |
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125 | uint32_t count; |
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126 | |
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127 | rtems_message_queue_flush(event_q, &count); |
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128 | return RTEMS_SUCCESSFUL; |
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129 | } |
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130 | |
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131 | rtems_device_driver usbinput_read( |
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132 | rtems_device_major_number major, |
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133 | rtems_device_minor_number minor, |
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134 | void *arg |
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135 | ) |
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136 | { |
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137 | rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; |
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138 | rtems_status_code sc; |
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139 | |
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140 | if(rw_args->count < 8) { |
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141 | rw_args->bytes_moved = 0; |
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142 | return RTEMS_UNSATISFIED; |
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143 | } |
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144 | |
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145 | sc = rtems_message_queue_receive( |
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146 | event_q, |
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147 | rw_args->buffer, |
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148 | (size_t *)&rw_args->bytes_moved, |
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149 | RTEMS_WAIT, |
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150 | RTEMS_NO_TIMEOUT |
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151 | ); |
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152 | |
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153 | if(sc == RTEMS_SUCCESSFUL) |
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154 | return RTEMS_SUCCESSFUL; |
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155 | else { |
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156 | rw_args->bytes_moved = 0; |
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157 | return RTEMS_UNSATISFIED; |
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158 | } |
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159 | } |
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