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> 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 29static void (*udbg_adb_old_putc)(char c); 30static int (*udbg_adb_old_getc)(void); 31static int (*udbg_adb_old_getc_poll)(void); 32 33static enum { 34 input_adb_none, 35 input_adb_pmu, 36 input_adb_cuda, 37} input_type = input_adb_none; 38 39int xmon_wants_key, xmon_adb_keycode; 40 41static 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 54 55static int udbg_adb_use_btext; 56static int xmon_adb_shiftstate; 57 58static 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 66static 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 74static int udbg_adb_local_getc(void) 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 117static int udbg_adb_getc(void) 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 */ 133static 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 142static 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 152void __init udbg_adb_init_early(void) 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 162int __init udbg_adb_init(int force_btext) 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 */ 172 if (udbg_adb_old_putc == udbg_adb_putc) 173 udbg_adb_old_putc = NULL; 174#ifdef CONFIG_BOOTX_TEXT 175 if (udbg_adb_old_putc == btext_drawchar) 176 udbg_adb_old_putc = NULL; 177#endif 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); 196 int found = (parent && strcmp(parent->type, "adb") == 0); 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} 220