--- /dev/null
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * Source partly derived from:
+ * linux/drivers/char/pc_keyb.c
+ */
+#include <common.h>
+#include <asm/processor.h>
+#include <stdio_dev.h>
+#include "isa.h"
+#include "kbd.h"
+
+
+unsigned char kbd_read_status(void);
+unsigned char kbd_read_input(void);
+void kbd_send_data(unsigned char data);
+void disable_8259A_irq(unsigned int irq);
+void enable_8259A_irq(unsigned int irq);
+
+/* used only by send_data - set by keyboard_interrupt */
+
+
+#undef KBG_DEBUG
+
+#ifdef KBG_DEBUG
+#define PRINTF(fmt,args...) printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+#define KBD_STAT_KOBF 0x01
+#define KBD_STAT_IBF 0x02
+#define KBD_STAT_SYS 0x04
+#define KBD_STAT_CD 0x08
+#define KBD_STAT_LOCK 0x10
+#define KBD_STAT_MOBF 0x20
+#define KBD_STAT_TI_OUT 0x40
+#define KBD_STAT_PARERR 0x80
+
+#define KBD_INIT_TIMEOUT 1000 /* Timeout in ms for initializing the keyboard */
+#define KBC_TIMEOUT 250 /* Timeout in ms for sending to keyboard controller */
+#define KBD_TIMEOUT 2000 /* Timeout in ms for keyboard command acknowledge */
+/*
+ * Keyboard Controller Commands
+ */
+
+#define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
+#define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
+#define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
+#define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
+#define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
+#define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
+#define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
+#define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
+#define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
+#define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
+#define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
+ initiated by the auxiliary device */
+#define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
+
+/*
+ * Keyboard Commands
+ */
+
+#define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
+#define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
+#define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
+#define KBD_CMD_DISABLE 0xF5 /* Disable scanning */
+#define KBD_CMD_RESET 0xFF /* Reset */
+
+/*
+ * Keyboard Replies
+ */
+
+#define KBD_REPLY_POR 0xAA /* Power on reset */
+#define KBD_REPLY_ACK 0xFA /* Command ACK */
+#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
+
+/*
+ * Status Register Bits
+ */
+
+#define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
+#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
+#define KBD_STAT_SELFTEST 0x04 /* Self test successful */
+#define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
+#define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
+#define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
+#define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
+#define KBD_STAT_PERR 0x80 /* Parity error */
+
+#define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF)
+
+/*
+ * Controller Mode Register Bits
+ */
+
+#define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
+#define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
+#define KBD_MODE_SYS 0x04 /* The system flag (?) */
+#define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
+#define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
+#define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
+#define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
+#define KBD_MODE_RFU 0x80
+
+
+#define KDB_DATA_PORT 0x60
+#define KDB_COMMAND_PORT 0x64
+
+#define LED_SCR 0x01 /* scroll lock led */
+#define LED_CAP 0x04 /* caps lock led */
+#define LED_NUM 0x02 /* num lock led */
+
+#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
+
+
+static volatile char kbd_buffer[KBD_BUFFER_LEN];
+static volatile int in_pointer = 0;
+static volatile int out_pointer = 0;
+
+
+static unsigned char num_lock = 0;
+static unsigned char caps_lock = 0;
+static unsigned char scroll_lock = 0;
+static unsigned char shift = 0;
+static unsigned char ctrl = 0;
+static unsigned char alt = 0;
+static unsigned char e0 = 0;
+static unsigned char leds = 0;
+
+#define DEVNAME "kbd"
+
+/* Simple translation table for the keys */
+
+static unsigned char kbd_plain_xlate[] = {
+ 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
+ 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
+ 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
+ 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
+ 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
+ '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
+ '\r',0xff,0xff
+ };
+
+static unsigned char kbd_shift_xlate[] = {
+ 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */
+ 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
+ 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
+ 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
+ 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
+ '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
+ '\r',0xff,0xff
+ };
+
+static unsigned char kbd_ctrl_xlate[] = {
+ 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
+ 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
+ 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
+ 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
+ 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
+ '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
+ '\r',0xff,0xff
+ };
+
+/******************************************************************
+ * Init
+ ******************************************************************/
+int isa_kbd_init(void)
+{
+ char* result;
+ result=kbd_initialize();
+ if(result==NULL) {
+ PRINTF("AT Keyboard initialized\n");
+ irq_install_handler(25, (interrupt_handler_t *)handle_isa_int, NULL);
+ isa_irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL);
+ return (1);
+ } else {
+ printf("%s\n",result);
+ return (-1);
+ }
+}
+
+#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
+extern int overwrite_console (void);
+#else
+int overwrite_console (void)
+{
+ return (0);
+}
+#endif
+
+int drv_isa_kbd_init (void)
+{
+ int error;
+ struct stdio_dev kbddev ;
+ char *stdinname = getenv ("stdin");
+
+ if(isa_kbd_init()==-1)
+ return -1;
+ memset (&kbddev, 0, sizeof(kbddev));
+ strcpy(kbddev.name, DEVNAME);
+ kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
+ kbddev.putc = NULL ;
+ kbddev.puts = NULL ;
+ kbddev.getc = kbd_getc ;
+ kbddev.tstc = kbd_testc ;
+
+ error = stdio_register (&kbddev);
+ if(error==0) {
+ /* check if this is the standard input device */
+ if(strcmp(stdinname,DEVNAME)==0) {
+ /* reassign the console */
+ if(overwrite_console()) {
+ return 1;
+ }
+ error=console_assign(stdin,DEVNAME);
+ if(error==0)
+ return 1;
+ else
+ return error;
+ }
+ return 1;
+ }
+ return error;
+}
+
+/******************************************************************
+ * Queue handling
+ ******************************************************************/
+/* puts character in the queue and sets up the in and out pointer */
+void kbd_put_queue(char data)
+{
+ if((in_pointer+1)==KBD_BUFFER_LEN) {
+ if(out_pointer==0) {
+ return; /* buffer full */
+ } else{
+ in_pointer=0;
+ }
+ } else {
+ if((in_pointer+1)==out_pointer)
+ return; /* buffer full */
+ in_pointer++;
+ }
+ kbd_buffer[in_pointer]=data;
+ return;
+}
+
+/* test if a character is in the queue */
+int kbd_testc(void)
+{
+ if(in_pointer==out_pointer)
+ return(0); /* no data */
+ else
+ return(1);
+}
+/* gets the character from the queue */
+int kbd_getc(void)
+{
+ char c;
+ while(in_pointer==out_pointer);
+ if((out_pointer+1)==KBD_BUFFER_LEN)
+ out_pointer=0;
+ else
+ out_pointer++;
+ c=kbd_buffer[out_pointer];
+ return (int)c;
+
+}
+
+
+/* set LEDs */
+
+void kbd_set_leds(void)
+{
+ if(caps_lock==0)
+ leds&=~LED_CAP; /* switch caps_lock off */
+ else
+ leds|=LED_CAP; /* switch on LED */
+ if(num_lock==0)
+ leds&=~LED_NUM; /* switch LED off */
+ else
+ leds|=LED_NUM; /* switch on LED */
+ if(scroll_lock==0)
+ leds&=~LED_SCR; /* switch LED off */
+ else
+ leds|=LED_SCR; /* switch on LED */
+ kbd_send_data(KBD_CMD_SET_LEDS);
+ kbd_send_data(leds);
+}
+
+
+void handle_keyboard_event (unsigned char scancode)
+{
+ unsigned char keycode;
+
+ /* Convert scancode to keycode */
+ PRINTF ("scancode %x\n", scancode);
+ if (scancode == 0xe0) {
+ e0 = 1; /* special charakters */
+ return;
+ }
+ if (e0 == 1) {
+ e0 = 0; /* delete flag */
+ if (!(((scancode & 0x7F) == 0x38) || /* the right ctrl key */
+ ((scancode & 0x7F) == 0x1D) || /* the right alt key */
+ ((scancode & 0x7F) == 0x35) || /* the right '/' key */
+ ((scancode & 0x7F) == 0x1C)))
+ /* the right enter key */
+ /* we swallow unknown e0 codes */
+ return;
+ }
+ /* special cntrl keys */
+ switch (scancode) {
+ case 0x2A:
+ case 0x36: /* shift pressed */
+ shift = 1;
+ return; /* do nothing else */
+ case 0xAA:
+ case 0xB6: /* shift released */
+ shift = 0;
+ return; /* do nothing else */
+ case 0x38: /* alt pressed */
+ alt = 1;
+ return; /* do nothing else */
+ case 0xB8: /* alt released */
+ alt = 0;
+ return; /* do nothing else */
+ case 0x1d: /* ctrl pressed */
+ ctrl = 1;
+ return; /* do nothing else */
+ case 0x9d: /* ctrl released */
+ ctrl = 0;
+ return; /* do nothing else */
+ case 0x46: /* scrollock pressed */
+ scroll_lock = ~scroll_lock;
+ kbd_set_leds ();
+ return; /* do nothing else */
+ case 0x3A: /* capslock pressed */
+ caps_lock = ~caps_lock;
+ kbd_set_leds ();
+ return;
+ case 0x45: /* numlock pressed */
+ num_lock = ~num_lock;
+ kbd_set_leds ();
+ return;
+ case 0xC6: /* scroll lock released */
+ case 0xC5: /* num lock released */
+ case 0xBA: /* caps lock released */
+ return; /* just swallow */
+ }
+ if ((scancode & 0x80) == 0x80) /* key released */
+ return;
+ /* now, decide which table we need */
+ if (scancode > (sizeof (kbd_plain_xlate) / sizeof (kbd_plain_xlate[0]))) { /* scancode not in list */
+ PRINTF ("unkown scancode %X\n", scancode);
+ return; /* swallow it */
+ }
+ /* setup plain code first */
+ keycode = kbd_plain_xlate[scancode];
+ if (caps_lock == 1) { /* caps_lock is pressed, overwrite plain code */
+ if (scancode > (sizeof (kbd_shift_xlate) / sizeof (kbd_shift_xlate[0]))) { /* scancode not in list */
+ PRINTF ("unkown caps-locked scancode %X\n", scancode);
+ return; /* swallow it */
+ }
+ keycode = kbd_shift_xlate[scancode];
+ if (keycode < 'A') { /* we only want the alphas capital */
+ keycode = kbd_plain_xlate[scancode];
+ }
+ }
+ if (shift == 1) { /* shift overwrites caps_lock */
+ if (scancode > (sizeof (kbd_shift_xlate) / sizeof (kbd_shift_xlate[0]))) { /* scancode not in list */
+ PRINTF ("unkown shifted scancode %X\n", scancode);
+ return; /* swallow it */
+ }
+ keycode = kbd_shift_xlate[scancode];
+ }
+ if (ctrl == 1) { /* ctrl overwrites caps_lock and shift */
+ if (scancode > (sizeof (kbd_ctrl_xlate) / sizeof (kbd_ctrl_xlate[0]))) { /* scancode not in list */
+ PRINTF ("unkown ctrl scancode %X\n", scancode);
+ return; /* swallow it */
+ }
+ keycode = kbd_ctrl_xlate[scancode];
+ }
+ /* check if valid keycode */
+ if (keycode == 0xff) {
+ PRINTF ("unkown scancode %X\n", scancode);
+ return; /* swallow unknown codes */
+ }
+
+ kbd_put_queue (keycode);
+ PRINTF ("%x\n", keycode);
+}
+
+/*
+ * This reads the keyboard status port, and does the
+ * appropriate action.
+ *
+ */
+unsigned char handle_kbd_event(void)
+{
+ unsigned char status = kbd_read_status();
+ unsigned int work = 10000;
+
+ while ((--work > 0) && (status & KBD_STAT_OBF)) {
+ unsigned char scancode;
+
+ scancode = kbd_read_input();
+
+ /* Error bytes must be ignored to make the
+ Synaptics touchpads compaq use work */
+ /* Ignore error bytes */
+ if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR)))
+ {
+ if (status & KBD_STAT_MOUSE_OBF)
+ ; /* not supported: handle_mouse_event(scancode); */
+ else
+ handle_keyboard_event(scancode);
+ }
+ status = kbd_read_status();
+ }
+ if (!work)
+ PRINTF("pc_keyb: controller jammed (0x%02X).\n", status);
+ return status;
+}
+
+
+/******************************************************************************
+ * Lowlevel Part of keyboard section
+ */
+unsigned char kbd_read_status(void)
+{
+ return(in8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT));
+}
+
+unsigned char kbd_read_input(void)
+{
+ return(in8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT));
+}
+
+void kbd_write_command(unsigned char cmd)
+{
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd);
+}
+
+void kbd_write_output(unsigned char data)
+{
+ out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data);
+}
+
+int kbd_read_data(void)
+{
+ int val;
+ unsigned char status;
+
+ val = -1;
+ status = kbd_read_status();
+ if (status & KBD_STAT_OBF) {
+ val = kbd_read_input();
+ if (status & (KBD_STAT_GTO | KBD_STAT_PERR))
+ val = -2;
+ }
+ return val;
+}
+
+int kbd_wait_for_input(void)
+{
+ unsigned long timeout;
+ int val;
+
+ timeout = KBD_TIMEOUT;
+ val=kbd_read_data();
+ while(val < 0)
+ {
+ if(timeout--==0)
+ return -1;
+ udelay(1000);
+ val=kbd_read_data();
+ }
+ return val;
+}
+
+
+int kb_wait(void)
+{
+ unsigned long timeout = KBC_TIMEOUT * 10;
+
+ do {
+ unsigned char status = handle_kbd_event();
+ if (!(status & KBD_STAT_IBF))
+ return 0; /* ok */
+ udelay(1000);
+ timeout--;
+ } while (timeout);
+ return 1;
+}
+
+void kbd_write_command_w(int data)
+{
+ if(kb_wait())
+ PRINTF("timeout in kbd_write_command_w\n");
+ kbd_write_command(data);
+}
+
+void kbd_write_output_w(int data)
+{
+ if(kb_wait())
+ PRINTF("timeout in kbd_write_output_w\n");
+ kbd_write_output(data);
+}
+
+void kbd_send_data(unsigned char data)
+{
+ unsigned char status;
+ disable_8259A_irq(1); /* disable interrupt */
+ kbd_write_output_w(data);
+ status = kbd_wait_for_input();
+ if (status == KBD_REPLY_ACK)
+ enable_8259A_irq(1); /* enable interrupt */
+}
+
+
+char * kbd_initialize(void)
+{
+ int status;
+
+ in_pointer = 0; /* delete in Buffer */
+ out_pointer = 0;
+ /*
+ * Test the keyboard interface.
+ * This seems to be the only way to get it going.
+ * If the test is successful a x55 is placed in the input buffer.
+ */
+ kbd_write_command_w(KBD_CCMD_SELF_TEST);
+ if (kbd_wait_for_input() != 0x55)
+ return "Kbd: failed self test";
+ /*
+ * Perform a keyboard interface test. This causes the controller
+ * to test the keyboard clock and data lines. The results of the
+ * test are placed in the input buffer.
+ */
+ kbd_write_command_w(KBD_CCMD_KBD_TEST);
+ if (kbd_wait_for_input() != 0x00)
+ return "Kbd: interface failed self test";
+ /*
+ * Enable the keyboard by allowing the keyboard clock to run.
+ */
+ kbd_write_command_w(KBD_CCMD_KBD_ENABLE);
+ status = kbd_wait_for_input();
+ /*
+ * Reset keyboard. If the read times out
+ * then the assumption is that no keyboard is
+ * plugged into the machine.
+ * This defaults the keyboard to scan-code set 2.
+ *
+ * Set up to try again if the keyboard asks for RESEND.
+ */
+ do {
+ kbd_write_output_w(KBD_CMD_RESET);
+ status = kbd_wait_for_input();
+ if (status == KBD_REPLY_ACK)
+ break;
+ if (status != KBD_REPLY_RESEND) {
+ PRINTF("status: %X\n",status);
+ return "Kbd: reset failed, no ACK";
+ }
+ } while (1);
+ if (kbd_wait_for_input() != KBD_REPLY_POR)
+ return "Kbd: reset failed, no POR";
+
+ /*
+ * Set keyboard controller mode. During this, the keyboard should be
+ * in the disabled state.
+ *
+ * Set up to try again if the keyboard asks for RESEND.
+ */
+ do {
+ kbd_write_output_w(KBD_CMD_DISABLE);
+ status = kbd_wait_for_input();
+ if (status == KBD_REPLY_ACK)
+ break;
+ if (status != KBD_REPLY_RESEND)
+ return "Kbd: disable keyboard: no ACK";
+ } while (1);
+
+ kbd_write_command_w(KBD_CCMD_WRITE_MODE);
+ kbd_write_output_w(KBD_MODE_KBD_INT
+ | KBD_MODE_SYS
+ | KBD_MODE_DISABLE_MOUSE
+ | KBD_MODE_KCC);
+
+ /* AMCC powerpc portables need this to use scan-code set 1 -- Cort */
+ kbd_write_command_w(KBD_CCMD_READ_MODE);
+ if (!(kbd_wait_for_input() & KBD_MODE_KCC)) {
+ /*
+ * If the controller does not support conversion,
+ * Set the keyboard to scan-code set 1.
+ */
+ kbd_write_output_w(0xF0);
+ kbd_wait_for_input();
+ kbd_write_output_w(0x01);
+ kbd_wait_for_input();
+ }
+ kbd_write_output_w(KBD_CMD_ENABLE);
+ if (kbd_wait_for_input() != KBD_REPLY_ACK)
+ return "Kbd: enable keyboard: no ACK";
+
+ /*
+ * Finally, set the typematic rate to maximum.
+ */
+ kbd_write_output_w(KBD_CMD_SET_RATE);
+ if (kbd_wait_for_input() != KBD_REPLY_ACK)
+ return "Kbd: Set rate: no ACK";
+ kbd_write_output_w(0x00);
+ if (kbd_wait_for_input() != KBD_REPLY_ACK)
+ return "Kbd: Set rate: no ACK";
+ return NULL;
+}
+
+void kbd_interrupt(void)
+{
+ handle_kbd_event();
+}
Code Review / kvmfornfv.git / blobdiff