709ea543b9
At present stdio device functions do not get any clue as to which stdio
device is being acted on. Some implementations go to great lengths to work
around this, such as defining a whole separate set of functions for each
possible device.
For driver model we need to associate a stdio_dev with a device. It doesn't
seem possible to continue with this work-around approach.
Instead, add a stdio_dev pointer to each of the stdio member functions.
Note: The serial drivers have the same problem, but it is not strictly
necessary to fix that to get driver model running. Also, if we convert
serial over to driver model the problem will go away.
Code size increases by 244 bytes for Thumb2 and 428 for PowerPC.
22: stdio: Pass device pointer to stdio methods
arm: (for 2/2 boards) all +244.0 bss -4.0 text +248.0
powerpc: (for 1/1 boards) all +428.0 text +428.0
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
299 lines
8.7 KiB
C
299 lines
8.7 KiB
C
/***********************************************************************
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*
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* (C) Copyright 2004
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* DENX Software Engineering
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* Wolfgang Denk, wd@denx.de
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*
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* Keyboard driver
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*
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***********************************************************************/
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#include <common.h>
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#include <stdio_dev.h>
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#include <keyboard.h>
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#undef KBG_DEBUG
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#ifdef KBG_DEBUG
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#define PRINTF(fmt,args...) printf (fmt ,##args)
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#else
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#define PRINTF(fmt,args...)
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#endif
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#define DEVNAME "kbd"
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#define LED_SCR 0x01 /* scroll lock led */
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#define LED_CAP 0x04 /* caps lock led */
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#define LED_NUM 0x02 /* num lock led */
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#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
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#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
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int ps2ser_check(void);
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#endif
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static volatile char kbd_buffer[KBD_BUFFER_LEN];
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static volatile int in_pointer = 0;
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static volatile int out_pointer = 0;
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static unsigned char leds = 0;
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static unsigned char num_lock = 0;
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static unsigned char caps_lock = 0;
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static unsigned char scroll_lock = 0;
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static unsigned char shift = 0;
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static unsigned char ctrl = 0;
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static unsigned char alt = 0;
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static unsigned char e0 = 0;
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/******************************************************************
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* Queue handling
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******************************************************************/
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/* puts character in the queue and sets up the in and out pointer */
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static void kbd_put_queue(char data)
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{
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if((in_pointer+1)==KBD_BUFFER_LEN) {
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if(out_pointer==0) {
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return; /* buffer full */
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} else{
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in_pointer=0;
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}
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} else {
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if((in_pointer+1)==out_pointer)
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return; /* buffer full */
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in_pointer++;
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}
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kbd_buffer[in_pointer]=data;
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return;
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}
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/* test if a character is in the queue */
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static int kbd_testc(struct stdio_dev *dev)
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{
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#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
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/* no ISR is used, so received chars must be polled */
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ps2ser_check();
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#endif
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if(in_pointer==out_pointer)
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return(0); /* no data */
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else
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return(1);
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}
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/* gets the character from the queue */
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static int kbd_getc(struct stdio_dev *dev)
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{
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char c;
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while(in_pointer==out_pointer) {
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#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
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/* no ISR is used, so received chars must be polled */
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ps2ser_check();
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#endif
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;}
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if((out_pointer+1)==KBD_BUFFER_LEN)
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out_pointer=0;
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else
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out_pointer++;
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c=kbd_buffer[out_pointer];
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return (int)c;
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}
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/* Simple translation table for the keys */
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static unsigned char kbd_plain_xlate[] = {
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0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
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'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
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'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
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'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
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0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
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'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
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'\r',0xff,0xff
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};
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static unsigned char kbd_shift_xlate[] = {
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0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */
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'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
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'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
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'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
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0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
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'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
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'\r',0xff,0xff
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};
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static unsigned char kbd_ctrl_xlate[] = {
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0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
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0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
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0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
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0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
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0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
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'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
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'\r',0xff,0xff
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};
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void handle_scancode(unsigned char scancode)
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{
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unsigned char keycode;
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/* Convert scancode to keycode */
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PRINTF("scancode %x\n",scancode);
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if(scancode==0xe0) {
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e0=1; /* special charakters */
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return;
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}
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if(e0==1) {
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e0=0; /* delete flag */
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if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */
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((scancode&0x7F)==0x1D)|| /* the right alt key */
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((scancode&0x7F)==0x35)|| /* the right '/' key */
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((scancode&0x7F)==0x1C) )) /* the right enter key */
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/* we swallow unknown e0 codes */
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return;
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}
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/* special cntrl keys */
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switch(scancode) {
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case 0x2A:
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case 0x36: /* shift pressed */
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shift=1;
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return; /* do nothing else */
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case 0xAA:
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case 0xB6: /* shift released */
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shift=0;
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return; /* do nothing else */
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case 0x38: /* alt pressed */
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alt=1;
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return; /* do nothing else */
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case 0xB8: /* alt released */
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alt=0;
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return; /* do nothing else */
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case 0x1d: /* ctrl pressed */
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ctrl=1;
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return; /* do nothing else */
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case 0x9d: /* ctrl released */
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ctrl=0;
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return; /* do nothing else */
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case 0x46: /* scrollock pressed */
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scroll_lock=~scroll_lock;
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if(scroll_lock==0)
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leds&=~LED_SCR; /* switch LED off */
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else
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leds|=LED_SCR; /* switch on LED */
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pckbd_leds(leds);
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return; /* do nothing else */
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case 0x3A: /* capslock pressed */
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caps_lock=~caps_lock;
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if(caps_lock==0)
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leds&=~LED_CAP; /* switch caps_lock off */
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else
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leds|=LED_CAP; /* switch on LED */
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pckbd_leds(leds);
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return;
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case 0x45: /* numlock pressed */
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num_lock=~num_lock;
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if(num_lock==0)
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leds&=~LED_NUM; /* switch LED off */
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else
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leds|=LED_NUM; /* switch on LED */
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pckbd_leds(leds);
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return;
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case 0xC6: /* scroll lock released */
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case 0xC5: /* num lock released */
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case 0xBA: /* caps lock released */
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return; /* just swallow */
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}
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#if 1
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if((scancode&0x80)==0x80) /* key released */
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return;
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#else
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if((scancode&0x80)==0x00) /* key pressed */
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return;
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scancode &= ~0x80;
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#endif
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/* now, decide which table we need */
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if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
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PRINTF("unkown scancode %X\n",scancode);
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return; /* swallow it */
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}
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/* setup plain code first */
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keycode=kbd_plain_xlate[scancode];
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if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
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if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
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PRINTF("unkown caps-locked scancode %X\n",scancode);
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return; /* swallow it */
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}
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keycode=kbd_shift_xlate[scancode];
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if(keycode<'A') { /* we only want the alphas capital */
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keycode=kbd_plain_xlate[scancode];
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}
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}
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if(shift==1) { /* shift overwrites caps_lock */
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if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
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PRINTF("unkown shifted scancode %X\n",scancode);
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return; /* swallow it */
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}
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keycode=kbd_shift_xlate[scancode];
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}
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if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
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if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
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PRINTF("unkown ctrl scancode %X\n",scancode);
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return; /* swallow it */
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}
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keycode=kbd_ctrl_xlate[scancode];
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}
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/* check if valid keycode */
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if(keycode==0xff) {
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PRINTF("unkown scancode %X\n",scancode);
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return; /* swallow unknown codes */
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}
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kbd_put_queue(keycode);
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PRINTF("%x\n",keycode);
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}
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/******************************************************************
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* Init
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******************************************************************/
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#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
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extern int overwrite_console (void);
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#define OVERWRITE_CONSOLE overwrite_console ()
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#else
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#define OVERWRITE_CONSOLE 0
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#endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
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int kbd_init (void)
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{
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int error;
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struct stdio_dev kbddev ;
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char *stdinname = getenv ("stdin");
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if(kbd_init_hw()==-1)
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return -1;
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memset (&kbddev, 0, sizeof(kbddev));
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strcpy(kbddev.name, DEVNAME);
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kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
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kbddev.getc = kbd_getc ;
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kbddev.tstc = kbd_testc ;
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error = stdio_register (&kbddev);
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if(error==0) {
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/* check if this is the standard input device */
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if(strcmp(stdinname,DEVNAME)==0) {
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/* reassign the console */
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if(OVERWRITE_CONSOLE) {
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return 1;
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}
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error=console_assign(stdin,DEVNAME);
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if(error==0)
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return 1;
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else
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return error;
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}
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return 1;
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}
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return error;
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}
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