1 #include <linux/config.h> 2 #include <linux/string.h> 3 #include <linux/kernel.h> 4 #include <linux/errno.h> 5 #include <linux/bitops.h> 6 #include <linux/ptrace.h> 7 #include <linux/adb.h> 8 #include <linux/pmu.h> 9 #include <linux/cuda.h> 10 #include <asm/machdep.h> 11 #include <asm/io.h> 12 #include <asm/page.h> 13 #include <asm/xmon.h> 14 #include <asm/prom.h> 15 #include <asm/bootx.h> 16 #include <asm/machdep.h> 17 #include <asm/errno.h> 18 #include <asm/pmac_feature.h> 19 #include <asm/processor.h> 20 #include <asm/delay.h> 21 #include <asm/btext.h> 22 #include <asm/time.h> 23 #include <asm/udbg.h> 24 25 /* 26 * This implementation is "special", it can "patch" the current 27 * udbg implementation and work on top of it. It must thus be 28 * initialized last 29 */ 30 31 static void (*udbg_adb_old_putc)(char c); 32 static char (*udbg_adb_old_getc)(void); 33 static int (*udbg_adb_old_getc_poll)(void); 34 35 static enum { 36 input_adb_none, 37 input_adb_pmu, 38 input_adb_cuda, 39 } input_type = input_adb_none; 40 41 static int udbg_adb_use_btext; 42 43 int xmon_wants_key, xmon_adb_keycode; 44 45 static inline void udbg_adb_poll(void) 46 { 47 #ifdef CONFIG_ADB_PMU 48 if (input_type == input_adb_pmu) 49 pmu_poll_adb(); 50 #endif /* CONFIG_ADB_PMU */ 51 #ifdef CONFIG_ADB_CUDA 52 if (input_type == input_adb_cuda) 53 cuda_poll(); 54 #endif /* CONFIG_ADB_CUDA */ 55 } 56 57 #ifdef CONFIG_BOOTX_TEXT 58 static int xmon_adb_shiftstate; 59 60 static unsigned char xmon_keytab[128] = 61 "asdfhgzxcv\000bqwer" /* 0x00 - 0x0f */ 62 "yt123465=97-80]o" /* 0x10 - 0x1f */ 63 "u[ip\rlj'k;\\,/nm." /* 0x20 - 0x2f */ 64 "\t `\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ 65 "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ 66 "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ 67 68 static unsigned char xmon_shift_keytab[128] = 69 "ASDFHGZXCV\000BQWER" /* 0x00 - 0x0f */ 70 "YT!@#$^%+(&_*)}O" /* 0x10 - 0x1f */ 71 "U{IP\rLJ\"K:|<?NM>" /* 0x20 - 0x2f */ 72 "\t ~\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ 73 "\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ 74 "\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ 75 76 static char udbg_adb_local_getc(void) 77 { 78 int k, t, on; 79 80 xmon_wants_key = 1; 81 for (;;) { 82 xmon_adb_keycode = -1; 83 t = 0; 84 on = 0; 85 k = -1; 86 do { 87 if (--t < 0) { 88 on = 1 - on; 89 btext_drawchar(on? 0xdb: 0x20); 90 btext_drawchar('\b'); 91 t = 200000; 92 } 93 udbg_adb_poll(); 94 if (udbg_adb_old_getc_poll) 95 k = udbg_adb_old_getc_poll(); 96 } while (k == -1 && xmon_adb_keycode == -1); 97 if (on) 98 btext_drawstring(" \b"); 99 if (k != -1) 100 return k; 101 k = xmon_adb_keycode; 102 103 /* test for shift keys */ 104 if ((k & 0x7f) == 0x38 || (k & 0x7f) == 0x7b) { 105 xmon_adb_shiftstate = (k & 0x80) == 0; 106 continue; 107 } 108 if (k >= 0x80) 109 continue; /* ignore up transitions */ 110 k = (xmon_adb_shiftstate? xmon_shift_keytab: xmon_keytab)[k]; 111 if (k != 0) 112 break; 113 } 114 xmon_wants_key = 0; 115 return k; 116 } 117 #endif /* CONFIG_BOOTX_TEXT */ 118 119 static char udbg_adb_getc(void) 120 { 121 #ifdef CONFIG_BOOTX_TEXT 122 if (udbg_adb_use_btext && input_type != input_adb_none) 123 return udbg_adb_local_getc(); 124 #endif 125 if (udbg_adb_old_getc) 126 return udbg_adb_old_getc(); 127 return -1; 128 } 129 130 /* getc_poll() is not really used, unless you have the xmon-over modem 131 * hack that doesn't quite concern us here, thus we just poll the low level 132 * ADB driver to prevent it from timing out and call back the original poll 133 * routine. 134 */ 135 static int udbg_adb_getc_poll(void) 136 { 137 udbg_adb_poll(); 138 139 if (udbg_adb_old_getc_poll) 140 return udbg_adb_old_getc_poll(); 141 return -1; 142 } 143 144 static void udbg_adb_putc(char c) 145 { 146 #ifdef CONFIG_BOOTX_TEXT 147 if (udbg_adb_use_btext) 148 btext_drawchar(c); 149 #endif 150 if (udbg_adb_old_putc) 151 return udbg_adb_old_putc(c); 152 } 153 154 void udbg_adb_init_early(void) 155 { 156 #ifdef CONFIG_BOOTX_TEXT 157 if (btext_find_display(1) == 0) { 158 udbg_adb_use_btext = 1; 159 udbg_putc = udbg_adb_putc; 160 } 161 #endif 162 } 163 164 int udbg_adb_init(int force_btext) 165 { 166 struct device_node *np; 167 168 /* Capture existing callbacks */ 169 udbg_adb_old_putc = udbg_putc; 170 udbg_adb_old_getc = udbg_getc; 171 udbg_adb_old_getc_poll = udbg_getc_poll; 172 173 /* Check if our early init was already called */ 174 if (udbg_adb_old_putc == udbg_adb_putc) 175 udbg_adb_old_putc = NULL; 176 #ifdef CONFIG_BOOTX_TEXT 177 if (udbg_adb_old_putc == btext_drawchar) 178 udbg_adb_old_putc = NULL; 179 #endif 180 181 /* Set ours as output */ 182 udbg_putc = udbg_adb_putc; 183 udbg_getc = udbg_adb_getc; 184 udbg_getc_poll = udbg_adb_getc_poll; 185 186 #ifdef CONFIG_BOOTX_TEXT 187 /* Check if we should use btext output */ 188 if (btext_find_display(force_btext) == 0) 189 udbg_adb_use_btext = 1; 190 #endif 191 192 /* See if there is a keyboard in the device tree with a parent 193 * of type "adb". If not, we return a failure, but we keep the 194 * bext output set for now 195 */ 196 for (np = NULL; (np = of_find_node_by_name(np, "keyboard")) != NULL;) { 197 struct device_node *parent = of_get_parent(np); 198 int found = (parent && !strcmp(parent->type, "adb") == 0); 199 of_node_put(parent); 200 if (found) 201 break; 202 } 203 if (np == NULL) 204 return -ENODEV; 205 of_node_put(np); 206 207 #ifdef CONFIG_ADB_PMU 208 if (find_via_pmu()) 209 input_type = input_adb_pmu; 210 #endif 211 #ifdef CONFIG_ADB_CUDA 212 if (find_via_cuda()) 213 input_type = input_adb_cuda; 214 #endif 215 216 /* Same as above: nothing found, keep btext set for output */ 217 if (input_type == input_adb_none) 218 return -ENODEV; 219 220 return 0; 221 } 222