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[/] [or1k/] [tags/] [nog_patch_63/] [or1ksim/] [peripheral/] [ps2kbd.c] - Rev 1765
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/* ps2kbd.c -- Very simple (and limited) PS/2 keyboard simulation Copyright (C) 2002 Marko Mlinar, markom@opencores.org This file is part of OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include "config.h" #ifdef HAVE_INTTYPES_H #include <inttypes.h> #endif #include "port.h" #include "arch.h" #include "ps2kbd.h" #include "sim-config.h" #include "abstract.h" #include "sched.h" #include "pic.h" /* ASCII to scan code conversion table */ const static struct { /* Whether shift must be pressed */ unsigned char shift; /* Scan code to be generated */ unsigned char code; } scan_table [128] = { /* 0 - 15 */ {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x0E}, {0, 0x0F}, {0, 0x1C}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, /* 16 - 31 */ {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x01}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, /* 32 - 47 */ {0, 0x39}, {1, 0x02}, {1, 0x28}, {1, 0x04}, {1, 0x05}, {1, 0x06}, {1, 0x08}, {0, 0x28}, {1, 0x0A}, {1, 0x0B}, {1, 0x09}, {1, 0x0D}, {0, 0x33}, {0, 0x0C}, {0, 0x34}, {0, 0x35}, /* 48 - 63 */ {0, 0x0B}, {0, 0x02}, {0, 0x03}, {0, 0x04}, {0, 0x05}, {0, 0x06}, {0, 0x07}, {0, 0x08}, {0, 0x09}, {0, 0x0A}, {1, 0x27}, {0, 0x27}, {1, 0x33}, {0, 0x0D}, {1, 0x34}, {1, 0x35}, /* 64 - 79 */ {1, 0x03}, {1, 0x1E}, {1, 0x30}, {1, 0x2E}, {1, 0x20}, {1, 0x12}, {1, 0x21}, {1, 0x22}, {1, 0x23}, {1, 0x17}, {1, 0x24}, {1, 0x25}, {1, 0x26}, {1, 0x32}, {1, 0x31}, {1, 0x18}, /* 80 - 95 */ {1, 0x19}, {1, 0x10}, {1, 0x13}, {1, 0x1F}, {1, 0x14}, {1, 0x16}, {1, 0x2F}, {1, 0x11}, {1, 0x2D}, {1, 0x15}, {1, 0x2C}, {0, 0x1A}, {0, 0x2B}, {0, 0x1B}, {1, 0x07}, {1, 0x0C}, /* 96 - 111 */ {0, 0x29}, {0, 0x1E}, {0, 0x30}, {0, 0x2E}, {0, 0x20}, {0, 0x12}, {0, 0x21}, {0, 0x22}, {0, 0x23}, {0, 0x17}, {0, 0x24}, {0, 0x25}, {0, 0x26}, {0, 0x32}, {0, 0x31}, {0, 0x18}, /* 112 - 127 */ {0, 0x19}, {0, 0x10}, {0, 0x13}, {0, 0x1F}, {0, 0x14}, {0, 0x16}, {0, 0x2F}, {0, 0x11}, {0, 0x2D}, {0, 0x15}, {0, 0x2C}, {1, 0x1A}, {1, 0x2B}, {1, 0x1B}, {1, 0x29}, {0, 0x00} }; struct kbd_state { /* Temporary buffer to store incoming scan codes */ uint8_t buf[KBD_MAX_BUF]; /* Number of scan codes in buffer */ unsigned long buf_count; unsigned long buf_head; unsigned long buf_tail; /* Input stream */ FILE *rxfs; /* Controller Command (write into 0x64) */ int ccmd; /* Keyboard Command (write into 0x60) */ uint8_t kcmd; /* Controller Command Byte */ uint8_t ccmdbyte; /* Keyboard response pending */ unsigned long kresp; /* Keyboard slowdown factor */ long slowdown; /* Cofiguration */ int irq; oraddr_t baseaddr; char *rxfile; }; static void kbd_put (struct kbd_state *kbd, unsigned char c) { if (kbd->buf_count >= KBD_MAX_BUF) { fprintf (stderr, "WARNING: Keyboard buffer overflow.\n"); } else { kbd->buf[kbd->buf_head] = c; kbd->buf_head = (kbd->buf_head + 1) % KBD_MAX_BUF; kbd->buf_count++; } } /* Decodes ascii code c into multiple scan codes, placed into buf, length is returned */ static void scan_decode (struct kbd_state *kbd, unsigned char c) { /* Do not handle special characters and extended ascii */ if (c >= 128 || !scan_table[c].code) return; /* Make shift? */ if (scan_table[c].shift) kbd_put (kbd, 0x2a); /* Make char */ kbd_put (kbd, scan_table[c].code); /* Break char */ kbd_put (kbd, scan_table[c].code | 0x80); /* Break shift? */ if (scan_table[c].shift) kbd_put (kbd, 0xaa); } /* Write a register */ void kbd_write8 (oraddr_t addr, uint32_t value, void *dat) { struct kbd_state *kbd = dat; int a = (addr - kbd->baseaddr); switch (a) { case KBD_CTRL: kbd->ccmd = value & 0xff; if (kbd->ccmd == KBD_CCMD_RCB) kbd->kresp = 0x1; if (kbd->ccmd == KBD_CCMD_ST1) kbd->kresp = 0x1; if (kbd->ccmd == KBD_CCMD_ST2) kbd->kresp = 0x1; if (kbd->ccmd == KBD_CCMD_DKI) kbd->ccmdbyte |= KBD_CCMDBYTE_EN; if (kbd->ccmd == KBD_CCMD_EKI) kbd->ccmdbyte &= ~KBD_CCMDBYTE_EN; if (config.sim.verbose) PRINTF("kbd_write8(%"PRIxADDR") %"PRIx32"\n", addr, value); break; case KBD_DATA: if (kbd->ccmd == KBD_CCMD_WCB) { kbd->ccmdbyte = value & 0xff; kbd->ccmd = 0x00; } else kbd->kcmd = value & 0xff; if (kbd->kcmd == KBD_KCMD_DK) kbd->ccmdbyte |= KBD_CCMDBYTE_EN; if (kbd->kcmd == KBD_KCMD_EK) kbd->ccmdbyte &= ~KBD_CCMDBYTE_EN; kbd->kresp = 0x1; kbd->ccmd = 0x00; if (config.sim.verbose) PRINTF("kbd_write8(%"PRIxADDR") %"PRIx32"\n", addr, value); break; default: fprintf (stderr, "Write out of keyboard space (0x%"PRIxADDR")!\n", addr); runtime.sim.cont_run = 0; break; } } /* Read a register */ uint32_t kbd_read8 (oraddr_t addr, void *dat) { struct kbd_state *kbd = dat; int a = (addr - kbd->baseaddr); switch (a) { case KBD_CTRL: { unsigned long c = 0x0; if (kbd->kresp || kbd->buf_count) c |= KBD_STATUS_OBF; c |= kbd->ccmdbyte & KBD_CCMDBYTE_SYS; c |= KBD_STATUS_INH; if (config.sim.verbose) PRINTF("kbd_read8(%"PRIxADDR") %lx\n", addr, c); return c; } case KBD_DATA: if (kbd->ccmd) { unsigned long rc; if (kbd->ccmd == KBD_CCMD_RCB) rc = kbd->ccmdbyte; if (kbd->ccmd == KBD_CCMD_ST1) rc = 0x55; if (kbd->ccmd == KBD_CCMD_ST2) rc = 0x00; kbd->ccmd = 0x00; kbd->kresp = 0x0; if (config.sim.verbose) PRINTF("kbd_read8(%"PRIxADDR") %lx\n", addr, rc); return rc; } else if (kbd->kresp) { unsigned long rc; if (kbd->kresp == 0x2) { kbd->kresp = 0x0; rc = KBD_KRESP_RSTOK; } else if (kbd->kcmd == KBD_KCMD_RST) { kbd->kresp = 0x2; rc = KBD_KRESP_ACK; } else if (kbd->kcmd == KBD_KCMD_ECHO) { kbd->kresp = 0x0; rc = KBD_KRESP_ECHO; } else { kbd->kresp = 0x0; rc = KBD_KRESP_ACK; } kbd->kcmd = 0x00; if (config.sim.verbose) PRINTF("kbd_read8(%"PRIxADDR") %lx\n", addr, rc); return rc; } else if (kbd->buf_count) { unsigned long c = kbd->buf[kbd->buf_tail]; kbd->buf_tail = (kbd->buf_tail + 1) % KBD_MAX_BUF; kbd->buf_count--; kbd->kresp = 0x0; if (config.sim.verbose) PRINTF("kbd_read8(%"PRIxADDR") %lx\n", addr, c); return c; } kbd->kresp = 0x0; if (config.sim.verbose) PRINTF("kbd_read8(%"PRIxADDR") fifo empty\n", addr); return 0; default: fprintf (stderr, "Read out of keyboard space (0x%"PRIxADDR")!\n", addr); runtime.sim.cont_run = 0; return 0; } } /* Simulation hook. Must be called every couple of clock cycles to simulate incomming data. */ void kbd_job(void *dat) { struct kbd_state *kbd = dat; int c; int kbd_int = 0; /* Check if there is something waiting, and decode it into kdb_buf */ if((c = fgetc(kbd->rxfs)) != EOF) { scan_decode (kbd, c); } kbd_int = kbd->kresp || kbd->buf_count ? kbd->ccmdbyte & KBD_CCMDBYTE_INT : 0; if (config.sim.verbose && kbd_int) PRINTF("Keyboard Interrupt.... kbd_kresp %lx kbd_buf_count %lx \n", kbd->kresp, kbd->buf_count); if (kbd_int) report_interrupt(kbd->irq); SCHED_ADD(kbd_job, dat, kbd->slowdown); } /* Reset all (simulated) ps2 controlers/keyboards */ void kbd_reset (void *dat) { struct kbd_state *kbd = dat; kbd->buf_count = 0; kbd->buf_head = 0; kbd->buf_tail = 0; kbd->kresp = 0x0; kbd->ccmdbyte = 0x65; /* We reset into default normal operation. */ if (!(kbd->rxfs = fopen(kbd->rxfile, "r")) && !(kbd->rxfs = fopen(kbd->rxfile, "r+"))) { fprintf (stderr, "WARNING: Unable to open RX file stream.\n"); return; } kbd->slowdown = (long) ((config.sim.system_kfreq * 1000.) / KBD_BAUD_RATE); if (kbd->slowdown <= 0) kbd->slowdown = 1; SCHED_ADD(kbd_job, dat, kbd->slowdown); } void kbd_info(void *dat) { struct kbd_state *kbd = dat; PRINTF("kbd_kcmd: %x\n", kbd->kcmd); PRINTF("kbd_ccmd: %x\n", kbd->ccmd); PRINTF("kbd_ccmdbyte: %x\n", kbd->ccmdbyte); PRINTF("kbd_kresp: %lx\n", kbd->kresp); PRINTF("kbd_buf_count: %lx\n", kbd->buf_count); } /*----------------------------------------------------[ KBD Configuration ]---*/ void kbd_baseaddr(union param_val val, void *dat) { struct kbd_state *kbd = dat; kbd->baseaddr = val.addr_val; } void kbd_irq(union param_val val, void *dat) { struct kbd_state *kbd = dat; kbd->irq = val.int_val; } void kbd_rxfile(union param_val val, void *dat) { struct kbd_state *kbd = dat; if(!(kbd->rxfile = strdup(val.str_val))) { fprintf(stderr, "Peripheral KBD: Run out of memory\n"); exit(-1); } } void *kbd_sec_start(void) { struct kbd_state *new = malloc(sizeof(struct kbd_state)); if(!new) { fprintf(stderr, "Peripheral KBD: Run out of memory\n"); exit(-1); } new->buf_count = 0; new->buf_head = 0; new->buf_tail = 0; new->rxfs = NULL; return new; } void kbd_sec_end(void *dat) { struct kbd_state *kbd = dat; register_memoryarea(kbd->baseaddr, KBD_SPACE, 1, 0, kbd_read8, kbd_write8, dat); reg_sim_reset(kbd_reset, dat); reg_sim_stat(kbd_info, dat); } void reg_kbd_sec(void) { struct config_section *sec = reg_config_sec("kbd", kbd_sec_start, kbd_sec_end); reg_config_param(sec, "baseaddr", paramt_int, kbd_baseaddr); reg_config_param(sec, "irq", paramt_int, kbd_irq); reg_config_param(sec, "rxfile", paramt_str, kbd_rxfile); }