1 /* 2 * arch/m68k/mvme16x/config.c 3 * 4 * Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk] 5 * 6 * Based on: 7 * 8 * linux/amiga/config.c 9 * 10 * Copyright (C) 1993 Hamish Macdonald 11 * 12 * This file is subject to the terms and conditions of the GNU General Public 13 * License. See the file README.legal in the main directory of this archive 14 * for more details. 15 */ 16 17 #include <linux/types.h> 18 #include <linux/kernel.h> 19 #include <linux/mm.h> 20 #include <linux/seq_file.h> 21 #include <linux/tty.h> 22 #include <linux/console.h> 23 #include <linux/linkage.h> 24 #include <linux/init.h> 25 #include <linux/major.h> 26 #include <linux/genhd.h> 27 #include <linux/rtc.h> 28 #include <linux/interrupt.h> 29 #include <linux/module.h> 30 31 #include <asm/bootinfo.h> 32 #include <asm/bootinfo-vme.h> 33 #include <asm/byteorder.h> 34 #include <asm/pgtable.h> 35 #include <asm/setup.h> 36 #include <asm/irq.h> 37 #include <asm/traps.h> 38 #include <asm/machdep.h> 39 #include <asm/mvme16xhw.h> 40 41 extern t_bdid mvme_bdid; 42 43 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE; 44 45 static void mvme16x_get_model(char *model); 46 extern void mvme16x_sched_init(irq_handler_t handler); 47 extern u32 mvme16x_gettimeoffset(void); 48 extern int mvme16x_hwclk (int, struct rtc_time *); 49 extern void mvme16x_reset (void); 50 51 int bcd2int (unsigned char b); 52 53 /* Save tick handler routine pointer, will point to xtime_update() in 54 * kernel/time/timekeeping.c, called via mvme16x_process_int() */ 55 56 static irq_handler_t tick_handler; 57 58 59 unsigned short mvme16x_config; 60 EXPORT_SYMBOL(mvme16x_config); 61 62 63 int __init mvme16x_parse_bootinfo(const struct bi_record *bi) 64 { 65 uint16_t tag = be16_to_cpu(bi->tag); 66 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO) 67 return 0; 68 else 69 return 1; 70 } 71 72 void mvme16x_reset(void) 73 { 74 pr_info("\r\n\nCalled mvme16x_reset\r\n" 75 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r"); 76 /* The string of returns is to delay the reset until the whole 77 * message is output. Assert reset bit in GCSR */ 78 *(volatile char *)0xfff40107 = 0x80; 79 } 80 81 static void mvme16x_get_model(char *model) 82 { 83 p_bdid p = &mvme_bdid; 84 char suf[4]; 85 86 suf[1] = p->brdsuffix[0]; 87 suf[2] = p->brdsuffix[1]; 88 suf[3] = '\0'; 89 suf[0] = suf[1] ? '-' : '\0'; 90 91 sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf); 92 } 93 94 95 static void mvme16x_get_hardware_list(struct seq_file *m) 96 { 97 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 98 99 if (brdno == 0x0162 || brdno == 0x0172) 100 { 101 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 102 103 seq_printf (m, "VMEchip2 %spresent\n", 104 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 105 seq_printf (m, "SCSI interface %spresent\n", 106 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 107 seq_printf (m, "Ethernet i/f %spresent\n", 108 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 109 } 110 } 111 112 /* 113 * This function is called during kernel startup to initialize 114 * the mvme16x IRQ handling routines. Should probably ensure 115 * that the base vectors for the VMEChip2 and PCCChip2 are valid. 116 */ 117 118 static void __init mvme16x_init_IRQ (void) 119 { 120 m68k_setup_user_interrupt(VEC_USER, 192); 121 } 122 123 #define pcc2chip ((volatile u_char *)0xfff42000) 124 #define PccSCCMICR 0x1d 125 #define PccSCCTICR 0x1e 126 #define PccSCCRICR 0x1f 127 #define PccTPIACKR 0x25 128 129 #ifdef CONFIG_EARLY_PRINTK 130 131 /**** cd2401 registers ****/ 132 #define CD2401_ADDR (0xfff45000) 133 134 #define CyGFRCR (0x81) 135 #define CyCCR (0x13) 136 #define CyCLR_CHAN (0x40) 137 #define CyINIT_CHAN (0x20) 138 #define CyCHIP_RESET (0x10) 139 #define CyENB_XMTR (0x08) 140 #define CyDIS_XMTR (0x04) 141 #define CyENB_RCVR (0x02) 142 #define CyDIS_RCVR (0x01) 143 #define CyCAR (0xee) 144 #define CyIER (0x11) 145 #define CyMdmCh (0x80) 146 #define CyRxExc (0x20) 147 #define CyRxData (0x08) 148 #define CyTxMpty (0x02) 149 #define CyTxRdy (0x01) 150 #define CyLICR (0x26) 151 #define CyRISR (0x89) 152 #define CyTIMEOUT (0x80) 153 #define CySPECHAR (0x70) 154 #define CyOVERRUN (0x08) 155 #define CyPARITY (0x04) 156 #define CyFRAME (0x02) 157 #define CyBREAK (0x01) 158 #define CyREOIR (0x84) 159 #define CyTEOIR (0x85) 160 #define CyMEOIR (0x86) 161 #define CyNOTRANS (0x08) 162 #define CyRFOC (0x30) 163 #define CyRDR (0xf8) 164 #define CyTDR (0xf8) 165 #define CyMISR (0x8b) 166 #define CyRISR (0x89) 167 #define CyTISR (0x8a) 168 #define CyMSVR1 (0xde) 169 #define CyMSVR2 (0xdf) 170 #define CyDSR (0x80) 171 #define CyDCD (0x40) 172 #define CyCTS (0x20) 173 #define CyDTR (0x02) 174 #define CyRTS (0x01) 175 #define CyRTPRL (0x25) 176 #define CyRTPRH (0x24) 177 #define CyCOR1 (0x10) 178 #define CyPARITY_NONE (0x00) 179 #define CyPARITY_E (0x40) 180 #define CyPARITY_O (0xC0) 181 #define Cy_5_BITS (0x04) 182 #define Cy_6_BITS (0x05) 183 #define Cy_7_BITS (0x06) 184 #define Cy_8_BITS (0x07) 185 #define CyCOR2 (0x17) 186 #define CyETC (0x20) 187 #define CyCtsAE (0x02) 188 #define CyCOR3 (0x16) 189 #define Cy_1_STOP (0x02) 190 #define Cy_2_STOP (0x04) 191 #define CyCOR4 (0x15) 192 #define CyREC_FIFO (0x0F) /* Receive FIFO threshold */ 193 #define CyCOR5 (0x14) 194 #define CyCOR6 (0x18) 195 #define CyCOR7 (0x07) 196 #define CyRBPR (0xcb) 197 #define CyRCOR (0xc8) 198 #define CyTBPR (0xc3) 199 #define CyTCOR (0xc0) 200 #define CySCHR1 (0x1f) 201 #define CySCHR2 (0x1e) 202 #define CyTPR (0xda) 203 #define CyPILR1 (0xe3) 204 #define CyPILR2 (0xe0) 205 #define CyPILR3 (0xe1) 206 #define CyCMR (0x1b) 207 #define CyASYNC (0x02) 208 #define CyLICR (0x26) 209 #define CyLIVR (0x09) 210 #define CySCRL (0x23) 211 #define CySCRH (0x22) 212 #define CyTFTC (0x80) 213 214 void mvme16x_cons_write(struct console *co, const char *str, unsigned count) 215 { 216 volatile unsigned char *base_addr = (u_char *)CD2401_ADDR; 217 volatile u_char sink; 218 u_char ier; 219 int port; 220 u_char do_lf = 0; 221 int i = 0; 222 223 /* Ensure transmitter is enabled! */ 224 225 port = 0; 226 base_addr[CyCAR] = (u_char)port; 227 while (base_addr[CyCCR]) 228 ; 229 base_addr[CyCCR] = CyENB_XMTR; 230 231 ier = base_addr[CyIER]; 232 base_addr[CyIER] = CyTxMpty; 233 234 while (1) { 235 if (pcc2chip[PccSCCTICR] & 0x20) 236 { 237 /* We have a Tx int. Acknowledge it */ 238 sink = pcc2chip[PccTPIACKR]; 239 if ((base_addr[CyLICR] >> 2) == port) { 240 if (i == count) { 241 /* Last char of string is now output */ 242 base_addr[CyTEOIR] = CyNOTRANS; 243 break; 244 } 245 if (do_lf) { 246 base_addr[CyTDR] = '\n'; 247 str++; 248 i++; 249 do_lf = 0; 250 } 251 else if (*str == '\n') { 252 base_addr[CyTDR] = '\r'; 253 do_lf = 1; 254 } 255 else { 256 base_addr[CyTDR] = *str++; 257 i++; 258 } 259 base_addr[CyTEOIR] = 0; 260 } 261 else 262 base_addr[CyTEOIR] = CyNOTRANS; 263 } 264 } 265 266 base_addr[CyIER] = ier; 267 } 268 269 #endif 270 271 void __init config_mvme16x(void) 272 { 273 p_bdid p = &mvme_bdid; 274 char id[40]; 275 uint16_t brdno = be16_to_cpu(p->brdno); 276 277 mach_max_dma_address = 0xffffffff; 278 mach_sched_init = mvme16x_sched_init; 279 mach_init_IRQ = mvme16x_init_IRQ; 280 arch_gettimeoffset = mvme16x_gettimeoffset; 281 mach_hwclk = mvme16x_hwclk; 282 mach_reset = mvme16x_reset; 283 mach_get_model = mvme16x_get_model; 284 mach_get_hardware_list = mvme16x_get_hardware_list; 285 286 /* Report board revision */ 287 288 if (strncmp("BDID", p->bdid, 4)) 289 { 290 pr_crit("Bug call .BRD_ID returned garbage - giving up\n"); 291 while (1) 292 ; 293 } 294 /* Board type is only set by newer versions of vmelilo/tftplilo */ 295 if (vme_brdtype == 0) 296 vme_brdtype = brdno; 297 298 mvme16x_get_model(id); 299 pr_info("BRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev >> 4, 300 p->rev & 0xf, p->yr, p->mth, p->day); 301 if (brdno == 0x0162 || brdno == 0x172) 302 { 303 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 304 305 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA; 306 307 pr_info("MVME%x Hardware status:\n", brdno); 308 pr_info(" CPU Type 68%s040\n", 309 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC"); 310 pr_info(" CPU clock %dMHz\n", 311 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25); 312 pr_info(" VMEchip2 %spresent\n", 313 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 314 pr_info(" SCSI interface %spresent\n", 315 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 316 pr_info(" Ethernet interface %spresent\n", 317 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 318 } 319 else 320 { 321 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 322 } 323 } 324 325 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id) 326 { 327 unsigned long *new = (unsigned long *)vectors; 328 unsigned long *old = (unsigned long *)0xffe00000; 329 volatile unsigned char uc, *ucp; 330 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 331 332 if (brdno == 0x0162 || brdno == 0x172) 333 { 334 ucp = (volatile unsigned char *)0xfff42043; 335 uc = *ucp | 8; 336 *ucp = uc; 337 } 338 else 339 { 340 *(volatile unsigned long *)0xfff40074 = 0x40000000; 341 } 342 *(new+4) = *(old+4); /* Illegal instruction */ 343 *(new+9) = *(old+9); /* Trace */ 344 *(new+47) = *(old+47); /* Trap #15 */ 345 346 if (brdno == 0x0162 || brdno == 0x172) 347 *(new+0x5e) = *(old+0x5e); /* ABORT switch */ 348 else 349 *(new+0x6e) = *(old+0x6e); /* ABORT switch */ 350 return IRQ_HANDLED; 351 } 352 353 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id) 354 { 355 *(volatile unsigned char *)0xfff4201b |= 8; 356 return tick_handler(irq, dev_id); 357 } 358 359 void mvme16x_sched_init (irq_handler_t timer_routine) 360 { 361 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 362 int irq; 363 364 tick_handler = timer_routine; 365 /* Using PCCchip2 or MC2 chip tick timer 1 */ 366 *(volatile unsigned long *)0xfff42008 = 0; 367 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */ 368 *(volatile unsigned char *)0xfff42017 |= 3; 369 *(volatile unsigned char *)0xfff4201b = 0x16; 370 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0, 371 "timer", mvme16x_timer_int)) 372 panic ("Couldn't register timer int"); 373 374 if (brdno == 0x0162 || brdno == 0x172) 375 irq = MVME162_IRQ_ABORT; 376 else 377 irq = MVME167_IRQ_ABORT; 378 if (request_irq(irq, mvme16x_abort_int, 0, 379 "abort", mvme16x_abort_int)) 380 panic ("Couldn't register abort int"); 381 } 382 383 384 /* This is always executed with interrupts disabled. */ 385 u32 mvme16x_gettimeoffset(void) 386 { 387 return (*(volatile u32 *)0xfff42008) * 1000; 388 } 389 390 int bcd2int (unsigned char b) 391 { 392 return ((b>>4)*10 + (b&15)); 393 } 394 395 int mvme16x_hwclk(int op, struct rtc_time *t) 396 { 397 #warning check me! 398 if (!op) { 399 rtc->ctrl = RTC_READ; 400 t->tm_year = bcd2int (rtc->bcd_year); 401 t->tm_mon = bcd2int(rtc->bcd_mth) - 1; 402 t->tm_mday = bcd2int (rtc->bcd_dom); 403 t->tm_hour = bcd2int (rtc->bcd_hr); 404 t->tm_min = bcd2int (rtc->bcd_min); 405 t->tm_sec = bcd2int (rtc->bcd_sec); 406 rtc->ctrl = 0; 407 if (t->tm_year < 70) 408 t->tm_year += 100; 409 } 410 return 0; 411 } 412