Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 1 | #include <linux/string.h> |
| 2 | #include <linux/kernel.h> |
| 3 | #include <linux/errno.h> |
| 4 | #include <linux/bitops.h> |
| 5 | #include <linux/ptrace.h> |
| 6 | #include <linux/adb.h> |
| 7 | #include <linux/pmu.h> |
| 8 | #include <linux/cuda.h> |
| 9 | #include <asm/machdep.h> |
| 10 | #include <asm/io.h> |
| 11 | #include <asm/page.h> |
| 12 | #include <asm/xmon.h> |
| 13 | #include <asm/prom.h> |
| 14 | #include <asm/bootx.h> |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 15 | #include <asm/errno.h> |
| 16 | #include <asm/pmac_feature.h> |
| 17 | #include <asm/processor.h> |
| 18 | #include <asm/delay.h> |
| 19 | #include <asm/btext.h> |
| 20 | #include <asm/time.h> |
| 21 | #include <asm/udbg.h> |
| 22 | |
| 23 | /* |
| 24 | * This implementation is "special", it can "patch" the current |
| 25 | * udbg implementation and work on top of it. It must thus be |
| 26 | * initialized last |
| 27 | */ |
| 28 | |
| 29 | static void (*udbg_adb_old_putc)(char c); |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 30 | static int (*udbg_adb_old_getc)(void); |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 31 | static int (*udbg_adb_old_getc_poll)(void); |
| 32 | |
| 33 | static enum { |
| 34 | input_adb_none, |
| 35 | input_adb_pmu, |
| 36 | input_adb_cuda, |
| 37 | } input_type = input_adb_none; |
| 38 | |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 39 | int xmon_wants_key, xmon_adb_keycode; |
| 40 | |
| 41 | static inline void udbg_adb_poll(void) |
| 42 | { |
| 43 | #ifdef CONFIG_ADB_PMU |
| 44 | if (input_type == input_adb_pmu) |
| 45 | pmu_poll_adb(); |
| 46 | #endif /* CONFIG_ADB_PMU */ |
| 47 | #ifdef CONFIG_ADB_CUDA |
| 48 | if (input_type == input_adb_cuda) |
| 49 | cuda_poll(); |
| 50 | #endif /* CONFIG_ADB_CUDA */ |
| 51 | } |
| 52 | |
| 53 | #ifdef CONFIG_BOOTX_TEXT |
Andy Whitcroft | 54b9a9a | 2005-11-30 17:35:01 +0000 | [diff] [blame] | 54 | |
| 55 | static int udbg_adb_use_btext; |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 56 | static int xmon_adb_shiftstate; |
| 57 | |
| 58 | static unsigned char xmon_keytab[128] = |
| 59 | "asdfhgzxcv\000bqwer" /* 0x00 - 0x0f */ |
| 60 | "yt123465=97-80]o" /* 0x10 - 0x1f */ |
| 61 | "u[ip\rlj'k;\\,/nm." /* 0x20 - 0x2f */ |
| 62 | "\t `\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ |
| 63 | "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ |
| 64 | "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ |
| 65 | |
| 66 | static unsigned char xmon_shift_keytab[128] = |
| 67 | "ASDFHGZXCV\000BQWER" /* 0x00 - 0x0f */ |
| 68 | "YT!@#$^%+(&_*)}O" /* 0x10 - 0x1f */ |
| 69 | "U{IP\rLJ\"K:|<?NM>" /* 0x20 - 0x2f */ |
| 70 | "\t ~\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ |
| 71 | "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ |
| 72 | "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ |
| 73 | |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 74 | static int udbg_adb_local_getc(void) |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 75 | { |
| 76 | int k, t, on; |
| 77 | |
| 78 | xmon_wants_key = 1; |
| 79 | for (;;) { |
| 80 | xmon_adb_keycode = -1; |
| 81 | t = 0; |
| 82 | on = 0; |
| 83 | k = -1; |
| 84 | do { |
| 85 | if (--t < 0) { |
| 86 | on = 1 - on; |
| 87 | btext_drawchar(on? 0xdb: 0x20); |
| 88 | btext_drawchar('\b'); |
| 89 | t = 200000; |
| 90 | } |
| 91 | udbg_adb_poll(); |
| 92 | if (udbg_adb_old_getc_poll) |
| 93 | k = udbg_adb_old_getc_poll(); |
| 94 | } while (k == -1 && xmon_adb_keycode == -1); |
| 95 | if (on) |
| 96 | btext_drawstring(" \b"); |
| 97 | if (k != -1) |
| 98 | return k; |
| 99 | k = xmon_adb_keycode; |
| 100 | |
| 101 | /* test for shift keys */ |
| 102 | if ((k & 0x7f) == 0x38 || (k & 0x7f) == 0x7b) { |
| 103 | xmon_adb_shiftstate = (k & 0x80) == 0; |
| 104 | continue; |
| 105 | } |
| 106 | if (k >= 0x80) |
| 107 | continue; /* ignore up transitions */ |
| 108 | k = (xmon_adb_shiftstate? xmon_shift_keytab: xmon_keytab)[k]; |
| 109 | if (k != 0) |
| 110 | break; |
| 111 | } |
| 112 | xmon_wants_key = 0; |
| 113 | return k; |
| 114 | } |
| 115 | #endif /* CONFIG_BOOTX_TEXT */ |
| 116 | |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 117 | static int udbg_adb_getc(void) |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 118 | { |
| 119 | #ifdef CONFIG_BOOTX_TEXT |
| 120 | if (udbg_adb_use_btext && input_type != input_adb_none) |
| 121 | return udbg_adb_local_getc(); |
| 122 | #endif |
| 123 | if (udbg_adb_old_getc) |
| 124 | return udbg_adb_old_getc(); |
| 125 | return -1; |
| 126 | } |
| 127 | |
| 128 | /* getc_poll() is not really used, unless you have the xmon-over modem |
| 129 | * hack that doesn't quite concern us here, thus we just poll the low level |
| 130 | * ADB driver to prevent it from timing out and call back the original poll |
| 131 | * routine. |
| 132 | */ |
| 133 | static int udbg_adb_getc_poll(void) |
| 134 | { |
| 135 | udbg_adb_poll(); |
| 136 | |
| 137 | if (udbg_adb_old_getc_poll) |
| 138 | return udbg_adb_old_getc_poll(); |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | static void udbg_adb_putc(char c) |
| 143 | { |
| 144 | #ifdef CONFIG_BOOTX_TEXT |
| 145 | if (udbg_adb_use_btext) |
| 146 | btext_drawchar(c); |
| 147 | #endif |
| 148 | if (udbg_adb_old_putc) |
| 149 | return udbg_adb_old_putc(c); |
| 150 | } |
| 151 | |
Stephen Rothwell | 124d795 | 2007-08-15 20:55:57 +1000 | [diff] [blame] | 152 | void __init udbg_adb_init_early(void) |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 153 | { |
| 154 | #ifdef CONFIG_BOOTX_TEXT |
| 155 | if (btext_find_display(1) == 0) { |
| 156 | udbg_adb_use_btext = 1; |
| 157 | udbg_putc = udbg_adb_putc; |
| 158 | } |
| 159 | #endif |
| 160 | } |
| 161 | |
Stephen Rothwell | 124d795 | 2007-08-15 20:55:57 +1000 | [diff] [blame] | 162 | int __init udbg_adb_init(int force_btext) |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 163 | { |
| 164 | struct device_node *np; |
| 165 | |
| 166 | /* Capture existing callbacks */ |
| 167 | udbg_adb_old_putc = udbg_putc; |
| 168 | udbg_adb_old_getc = udbg_getc; |
| 169 | udbg_adb_old_getc_poll = udbg_getc_poll; |
| 170 | |
| 171 | /* Check if our early init was already called */ |
Andy Whitcroft | 52020d2 | 2005-11-30 17:34:50 +0000 | [diff] [blame] | 172 | if (udbg_adb_old_putc == udbg_adb_putc) |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 173 | udbg_adb_old_putc = NULL; |
Andy Whitcroft | 52020d2 | 2005-11-30 17:34:50 +0000 | [diff] [blame] | 174 | #ifdef CONFIG_BOOTX_TEXT |
| 175 | if (udbg_adb_old_putc == btext_drawchar) |
| 176 | udbg_adb_old_putc = NULL; |
| 177 | #endif |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 178 | |
| 179 | /* Set ours as output */ |
| 180 | udbg_putc = udbg_adb_putc; |
| 181 | udbg_getc = udbg_adb_getc; |
| 182 | udbg_getc_poll = udbg_adb_getc_poll; |
| 183 | |
| 184 | #ifdef CONFIG_BOOTX_TEXT |
| 185 | /* Check if we should use btext output */ |
| 186 | if (btext_find_display(force_btext) == 0) |
| 187 | udbg_adb_use_btext = 1; |
| 188 | #endif |
| 189 | |
| 190 | /* See if there is a keyboard in the device tree with a parent |
| 191 | * of type "adb". If not, we return a failure, but we keep the |
| 192 | * bext output set for now |
| 193 | */ |
| 194 | for (np = NULL; (np = of_find_node_by_name(np, "keyboard")) != NULL;) { |
| 195 | struct device_node *parent = of_get_parent(np); |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 196 | int found = (parent && strcmp(parent->type, "adb") == 0); |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 197 | of_node_put(parent); |
| 198 | if (found) |
| 199 | break; |
| 200 | } |
| 201 | if (np == NULL) |
| 202 | return -ENODEV; |
| 203 | of_node_put(np); |
| 204 | |
| 205 | #ifdef CONFIG_ADB_PMU |
| 206 | if (find_via_pmu()) |
| 207 | input_type = input_adb_pmu; |
| 208 | #endif |
| 209 | #ifdef CONFIG_ADB_CUDA |
| 210 | if (find_via_cuda()) |
| 211 | input_type = input_adb_cuda; |
| 212 | #endif |
| 213 | |
| 214 | /* Same as above: nothing found, keep btext set for output */ |
| 215 | if (input_type == input_adb_none) |
| 216 | return -ENODEV; |
| 217 | |
| 218 | return 0; |
| 219 | } |