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982 | decky | 1 | /* |
2 | * Copyright (C) 2006 Martin Decky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <arch/drivers/cuda.h> |
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30 | #include <arch/asm.h> |
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987 | decky | 31 | #include <console/console.h> |
1480 | palkovsky | 32 | #include <arch/drivers/pic.h> |
1625 | decky | 33 | #include <sysinfo/sysinfo.h> |
1480 | palkovsky | 34 | #include <interrupt.h> |
1619 | decky | 35 | #include <stdarg.h> |
982 | decky | 36 | |
1619 | decky | 37 | #define PACKET_ADB 0x00 |
38 | #define PACKET_CUDA 0x01 |
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39 | #define PACKET_NULL 0xff |
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40 | |||
982 | decky | 41 | #define CUDA_POWERDOWN 0x0a |
42 | |||
43 | #define RS 0x200 |
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44 | #define B (0 * RS) |
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45 | #define A (1 * RS) |
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46 | #define SR (10 * RS) |
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47 | #define ACR (11 * RS) |
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48 | |||
49 | #define SR_OUT 0x10 |
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50 | #define TACK 0x10 |
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51 | #define TIP 0x20 |
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52 | |||
53 | |||
1619 | decky | 54 | static volatile __u8 *cuda = NULL; |
982 | decky | 55 | |
1606 | decky | 56 | |
1619 | decky | 57 | static char lchars[0x80] = { |
58 | 'a', 's', 'd', 'f', 'h', 'g', 'z', 'x', 'c', 'v', 0, 'b', 'q', 'w', 'e', 'r', |
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59 | 'y', 't', '1', '2', '3', '4', '6', '5', '=', '9', '7', '-', '8', '0', ']', 'o', |
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60 | 'u', '[', 'i', 'p', 13, 'l', 'j', '\'', 'k', ';', '\\', ',', '/', 'n', 'm', '.', |
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61 | 9, 32, '`', 8, 0, 27, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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62 | 0, '.', 0, '*', 0, '+', 0, 0, 0, 0, 0, '/', 13, 0, '-', 0, |
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63 | 0, 0, '0', '1', '2', '3', '4', '5', '6', '7', 0, '8', '9', 0, 0, 0, |
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64 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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65 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
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66 | }; |
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67 | |||
68 | |||
69 | static void send_packet(const __u8 kind, index_t count, ...) |
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70 | { |
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71 | index_t i; |
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72 | va_list va; |
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73 | |||
74 | switch (kind) { |
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75 | case PACKET_NULL: |
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76 | break; |
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77 | default: |
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78 | cuda[B] = cuda[B] | TIP; |
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79 | cuda[ACR] = cuda[ACR] | SR_OUT; |
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80 | cuda[SR] = kind; |
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81 | cuda[B] = cuda[B] & ~TIP; |
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82 | |||
83 | va_start(va, count); |
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84 | |||
85 | for (i = 0; i < count; i++) { |
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86 | cuda[ACR] = cuda[ACR] | SR_OUT; |
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87 | cuda[SR] = va_arg(va, int); |
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88 | cuda[B] = cuda[B] | TACK; |
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89 | } |
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90 | |||
91 | va_end(va); |
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92 | |||
93 | cuda[B] = cuda[B] | TIP; |
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94 | } |
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95 | } |
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96 | |||
97 | |||
98 | static void receive_packet(__u8 *kind, index_t count, __u8 data[]) |
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99 | { |
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100 | cuda[B] = cuda[B] & ~TIP; |
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101 | *kind = cuda[SR]; |
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102 | |||
103 | index_t i; |
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104 | for (i = 0; i < count; i++) |
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105 | data[i] = cuda[SR]; |
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106 | |||
107 | cuda[B] = cuda[B] | TIP; |
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108 | } |
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109 | |||
110 | |||
1606 | decky | 111 | /* Called from getc(). */ |
112 | static void cuda_resume(chardev_t *d) |
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113 | { |
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114 | } |
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115 | |||
116 | |||
117 | /* Called from getc(). */ |
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118 | static void cuda_suspend(chardev_t *d) |
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119 | { |
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120 | } |
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121 | |||
122 | |||
123 | static char key_read(chardev_t *d) |
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124 | { |
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125 | char ch; |
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126 | |||
127 | ch = 0; |
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128 | return ch; |
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129 | } |
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130 | |||
131 | |||
1625 | decky | 132 | chardev_t kbrd; |
1606 | decky | 133 | static chardev_operations_t ops = { |
134 | .suspend = cuda_suspend, |
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135 | .resume = cuda_resume, |
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136 | .read = key_read |
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137 | }; |
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138 | |||
1619 | decky | 139 | |
1480 | palkovsky | 140 | static void cuda_irq(int n, istate_t *istate) |
141 | { |
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1619 | decky | 142 | __u8 kind; |
143 | __u8 data[4]; |
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144 | |||
145 | receive_packet(&kind, 4, data); |
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146 | |||
147 | if ((kind == PACKET_ADB) && (data[0] == 0x40) && (data[1] == 0x2c)) { |
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148 | __u8 key = data[2]; |
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149 | |||
150 | if ((key & 0x80) != 0x80) |
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151 | chardev_push_character(&kbrd, lchars[key & 0x7f]); |
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152 | } |
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1480 | palkovsky | 153 | } |
982 | decky | 154 | |
1619 | decky | 155 | |
156 | void cuda_init(__address base, size_t size) |
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990 | decky | 157 | { |
1619 | decky | 158 | cuda = (__u8 *) hw_map(base, size); |
159 | |||
1480 | palkovsky | 160 | int_register(CUDA_IRQ, "cuda", cuda_irq); |
161 | pic_enable_interrupt(CUDA_IRQ); |
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1606 | decky | 162 | |
163 | chardev_initialize("cuda_kbd", &kbrd, &ops); |
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164 | stdin = &kbrd; |
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1625 | decky | 165 | |
166 | sysinfo_set_item_val("cuda", NULL, true); |
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167 | sysinfo_set_item_val("cuda.irq", NULL, CUDA_IRQ); |
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990 | decky | 168 | } |
169 | |||
170 | |||
982 | decky | 171 | void cpu_halt(void) { |
1004 | decky | 172 | #ifdef CONFIG_POWEROFF |
1619 | decky | 173 | send_packet(PACKET_CUDA, 1, CUDA_POWERDOWN); |
1269 | decky | 174 | #else |
1619 | decky | 175 | send_packet(PACKET_NULL, 0); |
176 | #endif |
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1269 | decky | 177 | asm volatile ( |
178 | "b 0\n" |
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179 | ); |
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982 | decky | 180 | } |