1 /* 2 * Copyright (c) 1992 OMRON Corporation. 3 * Copyright (c) 1992 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * OMRON Corporation. 8 * 9 * %sccs.include.redist.c% 10 * 11 * @(#)sio.c 7.1 (Berkeley) 12/13/92 12 */ 13 14 /* sio.c NOV-25-1991 */ 15 16 #define NSIO 2 17 18 #include <sys/param.h> 19 #include <luna68k/stand/sioreg.h> 20 #include <luna68k/stand/rcvbuf.h> 21 #include <luna68k/stand/kbdreg.h> 22 23 struct rcvbuf rcvbuf[NSIO]; 24 25 int sioconsole = -1; 26 struct siodevice *sio_addr[2]; 27 int cur_unit; 28 29 30 #define siounit(x) ( x & 0xffff ) 31 #define isprint(c) ((c >= 0x20) && (c < 0x7F) ? 1 : 0) 32 33 34 void 35 _siointr() 36 { 37 register int unit; 38 39 for (unit = 0; unit < NSIO; unit++) 40 siointr(unit); 41 } 42 43 siointr(unit) 44 register int unit; 45 { 46 register struct siodevice *sio = sio_addr[unit]; 47 register int rr0 = sioreg(REG(unit, RR0), 0); 48 register int rr1 = sioreg(REG(unit, RR1), 0); 49 50 if (rr0 & RR0_RXAVAIL) { 51 if (rr1 & RR1_FRAMING) 52 return; 53 54 if (rr1 & (RR1_PARITY | RR1_OVERRUN)) 55 sioreg(REG(unit, WR0), WR0_ERRRST); /* Channel-A Error Reset */ 56 57 if (unit == 1) { 58 register int c = kbd_decode(sio_addr[unit]->sio_data); 59 60 if ((c & KC_TYPE) == 0) { 61 if (isprint(c)) 62 PUSH_RBUF(unit, c); 63 else 64 PUSH_RBUF(unit, ' '); 65 } 66 } else { 67 PUSH_RBUF(unit, sio_addr[unit]->sio_data); 68 } 69 } 70 } 71 72 /* 73 * Following are all routines needed for SIO to act as console 74 */ 75 #include <luna68k/luna68k/cons.h> 76 #include "romvec.h" 77 78 siocnprobe(cp) 79 struct consdev *cp; 80 { 81 sio_addr[0] = (struct siodevice *) 0x51000000; 82 sio_addr[1] = (struct siodevice *) 0x51000004; 83 84 /* make sure hardware exists */ 85 if (badaddr((short *)sio_addr[0])) { 86 cp->cn_pri = CN_DEAD; 87 return; 88 } 89 90 /* locate the major number */ 91 92 /* initialize required fields */ 93 cp->cn_dev = cur_unit = 0; 94 cp->cn_tp = 0; 95 cp->cn_pri = CN_NORMAL; 96 } 97 98 siocninit(cp) 99 struct consdev *cp; 100 { 101 int unit = siounit(cp->cn_dev); 102 103 sioinit(); 104 sioconsole = unit; 105 } 106 107 siocngetc(dev) 108 dev_t dev; 109 { 110 register int c, unit = siounit(dev); 111 112 while (RBUF_EMPTY(unit)) { 113 DELAY(10); 114 } 115 116 POP_RBUF(unit, c); 117 118 return(c); 119 } 120 121 siocnputc(dev, c) 122 dev_t dev; 123 int c; 124 { 125 int unit = siounit(dev); 126 int s; 127 128 if (sioconsole == -1) { 129 (void) sioinit(); 130 sioconsole = unit; 131 } 132 133 s = splsio(); 134 135 /* wait for any pending transmission to finish */ 136 while ((sioreg(REG(unit, RR0), 0) & RR0_TXEMPTY) == 0); 137 138 sio_addr[unit]->sio_data = (c & 0xFF); 139 140 /* wait for any pending transmission to finish */ 141 while ((sioreg(REG(unit, RR0), 0) & RR0_TXEMPTY) == 0); 142 143 splx(s); 144 } 145 146 /* SIO misc routines */ 147 148 sioinit() 149 { 150 int s; 151 152 RBUF_INIT(0); 153 RBUF_INIT(1); 154 155 s = splsio(); 156 157 sioreg(REG(0, WR0), WR0_CHANRST); /* Channel-A Reset */ 158 159 sioreg(WR2A, WR2_VEC86 | WR2_INTR_1); /* Set CPU BUS Interface Mode */ 160 sioreg(WR2B, 0); /* Set Interrupt Vector */ 161 162 sioreg(REG(0, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 163 sioreg(REG(0, WR4), WR4_BAUD96 | WR4_STOP1 | WR4_NPARITY); /* Tx/Rx */ 164 sioreg(REG(0, WR3), WR3_RX8BIT | WR3_RXENBL); /* Rx */ 165 sioreg(REG(0, WR5), WR5_TX8BIT | WR5_TXENBL); /* Tx */ 166 sioreg(REG(0, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 167 sioreg(REG(0, WR1), WR1_RXALLS); /* Interrupted All Char. */ 168 169 sioreg(REG(1, WR0), WR0_CHANRST); /* Channel-A Reset */ 170 171 sioreg(REG(1, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 172 sioreg(REG(1, WR4), WR4_BAUD96 | WR4_STOP1 | WR4_NPARITY); /* Tx/Rx */ 173 sioreg(REG(1, WR3), WR3_RX8BIT | WR3_RXENBL); /* Rx */ 174 sioreg(REG(1, WR5), WR5_TX8BIT | WR5_TXENBL); /* Tx */ 175 sioreg(REG(1, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 176 sioreg(REG(1, WR1), WR1_RXALLS); /* Interrupted All Char. */ 177 178 splx(s); 179 } 180 181 int 182 sioreg(reg, val) 183 register int reg, val; 184 { 185 register int chan; 186 187 chan = CHANNEL(reg); 188 189 if (isStatusReg(reg)) { 190 if (REGNO(reg) != 0) 191 sio_addr[chan]->sio_cmd = REGNO(reg); 192 return(sio_addr[chan]->sio_stat); 193 } else { 194 if (REGNO(reg) != 0) 195 sio_addr[chan]->sio_cmd = REGNO(reg); 196 sio_addr[chan]->sio_cmd = val; 197 return(val); 198 } 199 } 200