421 lines
8.5 KiB
C
421 lines
8.5 KiB
C
/* Remote serial interface using Hitachi E7000 PC ISA card in a PC
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Copyright 1994 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifdef __GO32__
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#include "defs.h"
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#include "serial.h"
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#include <sys/dos.h>
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static int e7000pc_open PARAMS ((serial_t scb, const char *name));
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static void e7000pc_raw PARAMS ((serial_t scb));
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static int e7000pc_readchar PARAMS ((serial_t scb, int timeout));
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static int e7000pc_setbaudrate PARAMS ((serial_t scb, int rate));
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static int e7000pc_write PARAMS ((serial_t scb, const char *str, int len));
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static void e7000pc_close PARAMS ((serial_t scb));
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static serial_ttystate e7000pc_get_tty_state PARAMS ((serial_t scb));
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static int e7000pc_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
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static char *aptr PARAMS ((short p));
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static int dos_async_init PARAMS ((int port));
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static void dos_async_tx PARAMS ((const char c));
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static int dos_async_rx PARAMS (());
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#define OFF_DPD 0x0000
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#define OFF_DDP 0x1000
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#define OFF_CPD 0x2000
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#define OFF_CDP 0x2400
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#define OFF_FA 0x3000
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#define OFF_FB 0x3002
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#define OFF_FC 0x3004
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#define OFF_IRQTOD 0x3008
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#define OFF_IRQTOP 0x300a
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#define OFF_READY 0x300c
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#define OFF_PON 0x300e
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#define IDLE 0x0000
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#define CMD_CI 0x4349
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#define CMD_CO 0x434f
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#define CMD_LO 0x4c4f
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#define CMD_LS 0x4c53
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#define CMD_SV 0x5356
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#define CMD_SS 0x5353
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#define CMD_OK 0x4f4b
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#define CMD_ER 0x4552
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#define CMD_NF 0x4e46
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#define CMD_AB 0x4142
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#define CMD_ED 0x4544
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#define CMD_CE 0x4345
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static unsigned long fa;
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static unsigned long irqtod;
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static unsigned long ready;
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static unsigned long fb;
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static unsigned long cpd ;
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static unsigned long cdp ;
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static unsigned long ready;
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static unsigned long pon;
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static unsigned long irqtop;
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static unsigned long board_at;
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#define SET_BYTE(x,y) { char _buf = y;dosmemput(&_buf,1, x);}
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#define SET_WORD(x,y) { short _buf = y;dosmemput(&_buf,2, x);}
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#define GET_BYTE(x) ( dosmemget(x,1,&bb), bb)
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#define GET_WORD(x) ( dosmemget(x,2,&sb), sb)
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static unsigned char bb;
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static unsigned short sb;
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static struct sw
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{
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int sw;
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int addr;
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} sigs[] = {
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{0x14, 0xd0000},
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{0x15, 0xd4000},
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{0x16, 0xd8000},
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{0x17, 0xdc000},
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0};
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static int
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e7000pc_init ()
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{
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/* Look around in memory for the board's signature */
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int try;
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for (try = 0; sigs[try].sw; try++)
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{
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int val;
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board_at = sigs[try].addr;
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fa = board_at + OFF_FA;
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fb = board_at + OFF_FB;
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cpd = board_at + OFF_CPD;
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cdp = board_at + OFF_CDP;
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ready =board_at + OFF_READY;
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pon = board_at + OFF_PON;
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irqtop = board_at + OFF_IRQTOP;
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irqtod = board_at + OFF_IRQTOD;
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val = GET_WORD (ready);
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if (val == (0xaaa0 | sigs[try].sw))
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{
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if (GET_BYTE (pon) & 0xf)
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{
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SET_BYTE(fa, 0);
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SET_BYTE (fb, 0);
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SET_BYTE (irqtop, 1); /* Disable interrupts from e7000 */
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SET_WORD (ready, 1);
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printf_filtered ("\nConnected to the E7000PC at address 0x%x\n",
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sigs[try].addr);
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return 1;
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}
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error ("The E7000 PC board is working, but the E7000 is turned off.\n");
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return 0;
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}
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}
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error ("GDB cannot connect to the E7000 PC board, check that it is installed\n\
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and that the switch settings are correct. Some other DOS programs can \n\
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stop the board from working. Try starting from a very minimal boot, \n\
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perhaps you need to disable EMM386 over the region where the board has\n\
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its I/O space, remove other unneeded cards, etc etc\n");
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return 0;
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}
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static int pbuf_size;
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static int pbuf_index;
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static
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int
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e7000_get ()
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{
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static char pbuf[1000];
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char tmp[1000];
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int x;
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if (pbuf_index < pbuf_size)
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{
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x = pbuf[pbuf_index++];
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}
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else if ((GET_BYTE (fb) & 1))
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{
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int i;
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pbuf_size = GET_WORD(cdp + 2);
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dosmemget (cdp + 8, pbuf_size + 1, tmp);
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/* Tell the E7000 we've eaten */
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SET_BYTE(fb,0);
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/* Swap it around */
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for (i = 0; i < pbuf_size; i++)
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{
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pbuf[i] = tmp[i^1];
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}
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pbuf_index = 0;
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x = pbuf[pbuf_index++];
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}
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else
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{
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x = -1;
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}
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return x;
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}
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static int
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dosasync_read (fd, buf, len, timeout)
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int fd;
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char *buf;
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int len;
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int timeout;
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{
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long now;
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long then;
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int i = 0;
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int p;
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/* Then look for some more if we're still hungry */
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time (&now);
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then = now + timeout;
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while (i < len)
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{
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int ch = e7000_get();
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/* While there's room in the buffer, and we've already
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read the stuff in, suck it over */
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if (ch != -1)
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{
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buf[i++] = ch;
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while (i < len && pbuf_index < pbuf_size )
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{
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ch = e7000_get();
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if (ch == -1)
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break;
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buf[i++] = ch;
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}
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}
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time (&now);
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if (timeout == 0)
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return i;
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if (now >= then && timeout > 0)
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{
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return i;
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}
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}
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return len;
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}
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static int
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dosasync_write (fd, buf, len)
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int fd;
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const char *buf;
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int len;
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{
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int i;
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char dummy[1000];
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/* Construct copy locally */
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((short *)dummy)[0] = CMD_CI;
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((short *)dummy)[1] = len;
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((short *)dummy)[2] = 0;
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((short *)dummy)[3] = 0;
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for (i = 0; i < len ; i++)
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{
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dummy[8 + i ^ 1] = buf[i];
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}
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/* Wait for the card to get ready */
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while ((GET_BYTE(fa) & 1) != 0)
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;
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/* Blast onto the ISA card */
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dosmemput (dummy, 8 + len + 1, cpd);
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SET_BYTE(fa, 1);
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SET_BYTE(irqtod, 1); /* Interrupt the E7000 */
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return len;
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}
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static int
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e7000pc_open (scb, name)
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serial_t scb;
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const char *name;
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{
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if (strncasecmp (name, "pc", 2) != 0)
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{
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errno = ENOENT;
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return -1;
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}
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scb->fd = e7000pc_init ();
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if (!scb->fd)
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return -1;
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return 0;
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}
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static int
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e7000pc_noop (scb)
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serial_t scb;
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{
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return 0;
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}
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static void
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e7000pc_raw (scb)
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serial_t scb;
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{
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/* Always in raw mode */
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}
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static int
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e7000pc_readchar (scb, timeout)
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serial_t scb;
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int timeout;
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{
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char buf;
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top:
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if (dosasync_read (scb->fd, &buf, 1, timeout))
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{
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if (buf == 0) goto top;
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return buf;
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}
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else
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return SERIAL_TIMEOUT;
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}
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struct e7000pc_ttystate {
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int dummy;
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};
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/* e7000pc_{get set}_tty_state() are both dummys to fill out the function
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vector. Someday, they may do something real... */
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static serial_ttystate
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e7000pc_get_tty_state (scb)
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serial_t scb;
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{
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struct e7000pc_ttystate *state;
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state = (struct e7000pc_ttystate *) xmalloc (sizeof *state);
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return (serial_ttystate) state;
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}
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static int
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e7000pc_set_tty_state (scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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return 0;
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}
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static int
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e7000pc_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
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serial_t scb;
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serial_ttystate new_ttystate;
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serial_ttystate old_ttystate;
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{
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return 0;
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}
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static void
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e7000pc_print_tty_state (scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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/* Nothing to print. */
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return;
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}
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static int
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e7000pc_setbaudrate (scb, rate)
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serial_t scb;
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int rate;
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{
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return 0;
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}
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static int
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e7000pc_write (scb, str, len)
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serial_t scb;
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const char *str;
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int len;
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{
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dosasync_write (scb->fd, str, len);
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return 0;
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}
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static void
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e7000pc_close (scb)
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serial_t scb;
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{
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}
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static struct serial_ops e7000pc_ops =
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{
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"pc",
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0,
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e7000pc_open,
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e7000pc_close,
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e7000pc_readchar,
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e7000pc_write,
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e7000pc_noop, /* flush output */
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e7000pc_noop, /* flush input */
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e7000pc_noop, /* send break -- currently used only for nindy */
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e7000pc_raw,
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e7000pc_get_tty_state,
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e7000pc_set_tty_state,
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e7000pc_print_tty_state,
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e7000pc_noflush_set_tty_state,
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e7000pc_setbaudrate,
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};
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void
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_initialize_ser_e7000pc ()
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{
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serial_add_interface (&e7000pc_ops);
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}
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#else
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void
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_initialize_ser_e7000pc ()
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{
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}
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#endif
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