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220 lines
5.0 KiB
220 lines
5.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/string.h> |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/bitops.h> |
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#include <linux/ptrace.h> |
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#include <linux/adb.h> |
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#include <linux/pmu.h> |
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#include <linux/cuda.h> |
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#include <asm/machdep.h> |
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#include <asm/io.h> |
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#include <asm/page.h> |
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#include <asm/xmon.h> |
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#include <asm/prom.h> |
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#include <asm/bootx.h> |
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#include <asm/errno.h> |
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#include <asm/pmac_feature.h> |
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#include <asm/processor.h> |
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#include <asm/delay.h> |
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#include <asm/btext.h> |
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#include <asm/time.h> |
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#include <asm/udbg.h> |
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/* |
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* This implementation is "special", it can "patch" the current |
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* udbg implementation and work on top of it. It must thus be |
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* initialized last |
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*/ |
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static void (*udbg_adb_old_putc)(char c); |
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static int (*udbg_adb_old_getc)(void); |
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static int (*udbg_adb_old_getc_poll)(void); |
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static enum { |
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input_adb_none, |
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input_adb_pmu, |
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input_adb_cuda, |
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} input_type = input_adb_none; |
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int xmon_wants_key, xmon_adb_keycode; |
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static inline void udbg_adb_poll(void) |
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{ |
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#ifdef CONFIG_ADB_PMU |
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if (input_type == input_adb_pmu) |
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pmu_poll_adb(); |
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#endif /* CONFIG_ADB_PMU */ |
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#ifdef CONFIG_ADB_CUDA |
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if (input_type == input_adb_cuda) |
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cuda_poll(); |
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#endif /* CONFIG_ADB_CUDA */ |
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} |
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#ifdef CONFIG_BOOTX_TEXT |
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static int udbg_adb_use_btext; |
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static int xmon_adb_shiftstate; |
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static unsigned char xmon_keytab[128] = |
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"asdfhgzxcv\000bqwer" /* 0x00 - 0x0f */ |
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"yt123465=97-80]o" /* 0x10 - 0x1f */ |
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"u[ip\rlj'k;\\,/nm." /* 0x20 - 0x2f */ |
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"\t `\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ |
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"\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ |
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"\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ |
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static unsigned char xmon_shift_keytab[128] = |
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"ASDFHGZXCV\000BQWER" /* 0x00 - 0x0f */ |
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"YT!@#$^%+(&_*)}O" /* 0x10 - 0x1f */ |
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"U{IP\rLJ\"K:|<?NM>" /* 0x20 - 0x2f */ |
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"\t ~\177\0\033\0\0\0\0\0\0\0\0\0\0" /* 0x30 - 0x3f */ |
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"\0.\0*\0+\0\0\0\0\0/\r\0-\0" /* 0x40 - 0x4f */ |
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"\0\0000123456789\0\0\0"; /* 0x50 - 0x5f */ |
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static int udbg_adb_local_getc(void) |
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{ |
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int k, t, on; |
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xmon_wants_key = 1; |
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for (;;) { |
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xmon_adb_keycode = -1; |
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t = 0; |
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on = 0; |
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k = -1; |
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do { |
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if (--t < 0) { |
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on = 1 - on; |
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btext_drawchar(on? 0xdb: 0x20); |
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btext_drawchar('\b'); |
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t = 200000; |
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} |
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udbg_adb_poll(); |
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if (udbg_adb_old_getc_poll) |
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k = udbg_adb_old_getc_poll(); |
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} while (k == -1 && xmon_adb_keycode == -1); |
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if (on) |
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btext_drawstring(" \b"); |
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if (k != -1) |
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return k; |
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k = xmon_adb_keycode; |
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/* test for shift keys */ |
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if ((k & 0x7f) == 0x38 || (k & 0x7f) == 0x7b) { |
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xmon_adb_shiftstate = (k & 0x80) == 0; |
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continue; |
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} |
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if (k >= 0x80) |
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continue; /* ignore up transitions */ |
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k = (xmon_adb_shiftstate? xmon_shift_keytab: xmon_keytab)[k]; |
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if (k != 0) |
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break; |
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} |
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xmon_wants_key = 0; |
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return k; |
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} |
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#endif /* CONFIG_BOOTX_TEXT */ |
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static int udbg_adb_getc(void) |
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{ |
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#ifdef CONFIG_BOOTX_TEXT |
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if (udbg_adb_use_btext && input_type != input_adb_none) |
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return udbg_adb_local_getc(); |
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#endif |
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if (udbg_adb_old_getc) |
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return udbg_adb_old_getc(); |
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return -1; |
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} |
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/* getc_poll() is not really used, unless you have the xmon-over modem |
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* hack that doesn't quite concern us here, thus we just poll the low level |
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* ADB driver to prevent it from timing out and call back the original poll |
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* routine. |
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*/ |
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static int udbg_adb_getc_poll(void) |
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{ |
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udbg_adb_poll(); |
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if (udbg_adb_old_getc_poll) |
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return udbg_adb_old_getc_poll(); |
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return -1; |
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} |
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static void udbg_adb_putc(char c) |
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{ |
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#ifdef CONFIG_BOOTX_TEXT |
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if (udbg_adb_use_btext) |
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btext_drawchar(c); |
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#endif |
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if (udbg_adb_old_putc) |
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return udbg_adb_old_putc(c); |
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} |
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void __init udbg_adb_init_early(void) |
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{ |
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#ifdef CONFIG_BOOTX_TEXT |
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if (btext_find_display(1) == 0) { |
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udbg_adb_use_btext = 1; |
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udbg_putc = udbg_adb_putc; |
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} |
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#endif |
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} |
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int __init udbg_adb_init(int force_btext) |
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{ |
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struct device_node *np; |
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/* Capture existing callbacks */ |
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udbg_adb_old_putc = udbg_putc; |
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udbg_adb_old_getc = udbg_getc; |
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udbg_adb_old_getc_poll = udbg_getc_poll; |
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/* Check if our early init was already called */ |
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if (udbg_adb_old_putc == udbg_adb_putc) |
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udbg_adb_old_putc = NULL; |
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#ifdef CONFIG_BOOTX_TEXT |
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if (udbg_adb_old_putc == btext_drawchar) |
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udbg_adb_old_putc = NULL; |
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#endif |
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/* Set ours as output */ |
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udbg_putc = udbg_adb_putc; |
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udbg_getc = udbg_adb_getc; |
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udbg_getc_poll = udbg_adb_getc_poll; |
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#ifdef CONFIG_BOOTX_TEXT |
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/* Check if we should use btext output */ |
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if (btext_find_display(force_btext) == 0) |
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udbg_adb_use_btext = 1; |
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#endif |
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/* See if there is a keyboard in the device tree with a parent |
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* of type "adb". If not, we return a failure, but we keep the |
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* bext output set for now |
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*/ |
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for_each_node_by_name(np, "keyboard") { |
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struct device_node *parent = of_get_parent(np); |
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int found = of_node_is_type(parent, "adb"); |
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of_node_put(parent); |
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if (found) |
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break; |
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} |
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if (np == NULL) |
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return -ENODEV; |
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of_node_put(np); |
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#ifdef CONFIG_ADB_PMU |
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if (find_via_pmu()) |
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input_type = input_adb_pmu; |
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#endif |
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#ifdef CONFIG_ADB_CUDA |
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if (find_via_cuda()) |
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input_type = input_adb_cuda; |
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#endif |
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/* Same as above: nothing found, keep btext set for output */ |
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if (input_type == input_adb_none) |
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return -ENODEV; |
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return 0; |
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}
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