1 /* 2 * Copyright (c) 1992 OMRON Corporation. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. 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 8.1 (Berkeley) 06/10/93 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) == KC_CODE) 61 PUSH_RBUF(unit, c); 62 } else { 63 PUSH_RBUF(unit, sio_addr[unit]->sio_data); 64 } 65 } 66 } 67 68 /* 69 * Following are all routines needed for SIO to act as console 70 */ 71 #include <luna68k/luna68k/cons.h> 72 #include "romvec.h" 73 74 siocnprobe(cp) 75 struct consdev *cp; 76 { 77 sio_addr[0] = (struct siodevice *) 0x51000000; 78 sio_addr[1] = (struct siodevice *) 0x51000004; 79 80 /* make sure hardware exists */ 81 if (badaddr((short *)sio_addr[0])) { 82 cp->cn_pri = CN_DEAD; 83 return; 84 } 85 86 /* locate the major number */ 87 88 /* initialize required fields */ 89 cp->cn_dev = cur_unit = 0; 90 cp->cn_tp = 0; 91 cp->cn_pri = CN_NORMAL; 92 } 93 94 siocninit(cp) 95 struct consdev *cp; 96 { 97 int unit = siounit(cp->cn_dev); 98 99 sioinit(); 100 sioconsole = unit; 101 } 102 103 siocngetc(dev) 104 dev_t dev; 105 { 106 register int c, unit = siounit(dev); 107 108 while (RBUF_EMPTY(unit)) { 109 DELAY(10); 110 } 111 112 POP_RBUF(unit, c); 113 114 return(c); 115 } 116 117 siocnputc(dev, c) 118 dev_t dev; 119 int c; 120 { 121 int unit = siounit(dev); 122 int s; 123 124 if (sioconsole == -1) { 125 (void) sioinit(); 126 sioconsole = unit; 127 } 128 129 s = splsio(); 130 131 /* wait for any pending transmission to finish */ 132 while ((sioreg(REG(unit, RR0), 0) & RR0_TXEMPTY) == 0); 133 134 sio_addr[unit]->sio_data = (c & 0xFF); 135 136 /* wait for any pending transmission to finish */ 137 while ((sioreg(REG(unit, RR0), 0) & RR0_TXEMPTY) == 0); 138 139 splx(s); 140 } 141 142 /* SIO misc routines */ 143 144 sioinit() 145 { 146 int s; 147 148 RBUF_INIT(0); 149 RBUF_INIT(1); 150 151 s = splsio(); 152 153 sioreg(REG(0, WR0), WR0_CHANRST); /* Channel-A Reset */ 154 155 sioreg(WR2A, WR2_VEC86 | WR2_INTR_1); /* Set CPU BUS Interface Mode */ 156 sioreg(WR2B, 0); /* Set Interrupt Vector */ 157 158 sioreg(REG(0, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 159 sioreg(REG(0, WR4), WR4_BAUD96 | WR4_STOP1 | WR4_NPARITY); /* Tx/Rx */ 160 sioreg(REG(0, WR3), WR3_RX8BIT | WR3_RXENBL); /* Rx */ 161 sioreg(REG(0, WR5), WR5_TX8BIT | WR5_TXENBL); /* Tx */ 162 sioreg(REG(0, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 163 sioreg(REG(0, WR1), WR1_RXALLS); /* Interrupted All Char. */ 164 165 sioreg(REG(1, WR0), WR0_CHANRST); /* Channel-A Reset */ 166 167 sioreg(REG(1, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 168 sioreg(REG(1, WR4), WR4_BAUD96 | WR4_STOP1 | WR4_NPARITY); /* Tx/Rx */ 169 sioreg(REG(1, WR3), WR3_RX8BIT | WR3_RXENBL); /* Rx */ 170 sioreg(REG(1, WR5), WR5_TX8BIT | WR5_TXENBL); /* Tx */ 171 sioreg(REG(1, WR0), WR0_RSTINT); /* Reset E/S Interrupt */ 172 sioreg(REG(1, WR1), WR1_RXALLS); /* Interrupted All Char. */ 173 174 splx(s); 175 } 176 177 int 178 sioreg(reg, val) 179 register int reg, val; 180 { 181 register int chan; 182 183 chan = CHANNEL(reg); 184 185 if (isStatusReg(reg)) { 186 if (REGNO(reg) != 0) 187 sio_addr[chan]->sio_cmd = REGNO(reg); 188 return(sio_addr[chan]->sio_stat); 189 } else { 190 if (REGNO(reg) != 0) 191 sio_addr[chan]->sio_cmd = REGNO(reg); 192 sio_addr[chan]->sio_cmd = val; 193 return(val); 194 } 195 } 196