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/rtc.h> 39 #include <asm/machdep.h> 40 #include <asm/mvme16xhw.h> 41 42 extern t_bdid mvme_bdid; 43 44 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE; 45 46 static void mvme16x_get_model(char *model); 47 extern void mvme16x_sched_init(irq_handler_t handler); 48 extern u32 mvme16x_gettimeoffset(void); 49 extern int mvme16x_hwclk (int, struct rtc_time *); 50 extern int mvme16x_set_clock_mmss (unsigned long); 51 extern void mvme16x_reset (void); 52 53 int bcd2int (unsigned char b); 54 55 /* Save tick handler routine pointer, will point to xtime_update() in 56 * kernel/time/timekeeping.c, called via mvme16x_process_int() */ 57 58 static irq_handler_t tick_handler; 59 60 61 unsigned short mvme16x_config; 62 EXPORT_SYMBOL(mvme16x_config); 63 64 65 int __init mvme16x_parse_bootinfo(const struct bi_record *bi) 66 { 67 uint16_t tag = be16_to_cpu(bi->tag); 68 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO) 69 return 0; 70 else 71 return 1; 72 } 73 74 void mvme16x_reset(void) 75 { 76 printk ("\r\n\nCalled mvme16x_reset\r\n" 77 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r"); 78 /* The string of returns is to delay the reset until the whole 79 * message is output. Assert reset bit in GCSR */ 80 *(volatile char *)0xfff40107 = 0x80; 81 } 82 83 static void mvme16x_get_model(char *model) 84 { 85 p_bdid p = &mvme_bdid; 86 char suf[4]; 87 88 suf[1] = p->brdsuffix[0]; 89 suf[2] = p->brdsuffix[1]; 90 suf[3] = '\0'; 91 suf[0] = suf[1] ? '-' : '\0'; 92 93 sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf); 94 } 95 96 97 static void mvme16x_get_hardware_list(struct seq_file *m) 98 { 99 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 100 101 if (brdno == 0x0162 || brdno == 0x0172) 102 { 103 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 104 105 seq_printf (m, "VMEchip2 %spresent\n", 106 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 107 seq_printf (m, "SCSI interface %spresent\n", 108 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 109 seq_printf (m, "Ethernet i/f %spresent\n", 110 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 111 } 112 } 113 114 /* 115 * This function is called during kernel startup to initialize 116 * the mvme16x IRQ handling routines. Should probably ensure 117 * that the base vectors for the VMEChip2 and PCCChip2 are valid. 118 */ 119 120 static void __init mvme16x_init_IRQ (void) 121 { 122 m68k_setup_user_interrupt(VEC_USER, 192); 123 } 124 125 #define pcc2chip ((volatile u_char *)0xfff42000) 126 #define PccSCCMICR 0x1d 127 #define PccSCCTICR 0x1e 128 #define PccSCCRICR 0x1f 129 #define PccTPIACKR 0x25 130 131 #ifdef CONFIG_EARLY_PRINTK 132 133 /**** cd2401 registers ****/ 134 #define CD2401_ADDR (0xfff45000) 135 136 #define CyGFRCR (0x81) 137 #define CyCCR (0x13) 138 #define CyCLR_CHAN (0x40) 139 #define CyINIT_CHAN (0x20) 140 #define CyCHIP_RESET (0x10) 141 #define CyENB_XMTR (0x08) 142 #define CyDIS_XMTR (0x04) 143 #define CyENB_RCVR (0x02) 144 #define CyDIS_RCVR (0x01) 145 #define CyCAR (0xee) 146 #define CyIER (0x11) 147 #define CyMdmCh (0x80) 148 #define CyRxExc (0x20) 149 #define CyRxData (0x08) 150 #define CyTxMpty (0x02) 151 #define CyTxRdy (0x01) 152 #define CyLICR (0x26) 153 #define CyRISR (0x89) 154 #define CyTIMEOUT (0x80) 155 #define CySPECHAR (0x70) 156 #define CyOVERRUN (0x08) 157 #define CyPARITY (0x04) 158 #define CyFRAME (0x02) 159 #define CyBREAK (0x01) 160 #define CyREOIR (0x84) 161 #define CyTEOIR (0x85) 162 #define CyMEOIR (0x86) 163 #define CyNOTRANS (0x08) 164 #define CyRFOC (0x30) 165 #define CyRDR (0xf8) 166 #define CyTDR (0xf8) 167 #define CyMISR (0x8b) 168 #define CyRISR (0x89) 169 #define CyTISR (0x8a) 170 #define CyMSVR1 (0xde) 171 #define CyMSVR2 (0xdf) 172 #define CyDSR (0x80) 173 #define CyDCD (0x40) 174 #define CyCTS (0x20) 175 #define CyDTR (0x02) 176 #define CyRTS (0x01) 177 #define CyRTPRL (0x25) 178 #define CyRTPRH (0x24) 179 #define CyCOR1 (0x10) 180 #define CyPARITY_NONE (0x00) 181 #define CyPARITY_E (0x40) 182 #define CyPARITY_O (0xC0) 183 #define Cy_5_BITS (0x04) 184 #define Cy_6_BITS (0x05) 185 #define Cy_7_BITS (0x06) 186 #define Cy_8_BITS (0x07) 187 #define CyCOR2 (0x17) 188 #define CyETC (0x20) 189 #define CyCtsAE (0x02) 190 #define CyCOR3 (0x16) 191 #define Cy_1_STOP (0x02) 192 #define Cy_2_STOP (0x04) 193 #define CyCOR4 (0x15) 194 #define CyREC_FIFO (0x0F) /* Receive FIFO threshold */ 195 #define CyCOR5 (0x14) 196 #define CyCOR6 (0x18) 197 #define CyCOR7 (0x07) 198 #define CyRBPR (0xcb) 199 #define CyRCOR (0xc8) 200 #define CyTBPR (0xc3) 201 #define CyTCOR (0xc0) 202 #define CySCHR1 (0x1f) 203 #define CySCHR2 (0x1e) 204 #define CyTPR (0xda) 205 #define CyPILR1 (0xe3) 206 #define CyPILR2 (0xe0) 207 #define CyPILR3 (0xe1) 208 #define CyCMR (0x1b) 209 #define CyASYNC (0x02) 210 #define CyLICR (0x26) 211 #define CyLIVR (0x09) 212 #define CySCRL (0x23) 213 #define CySCRH (0x22) 214 #define CyTFTC (0x80) 215 216 void mvme16x_cons_write(struct console *co, const char *str, unsigned count) 217 { 218 volatile unsigned char *base_addr = (u_char *)CD2401_ADDR; 219 volatile u_char sink; 220 u_char ier; 221 int port; 222 u_char do_lf = 0; 223 int i = 0; 224 225 /* Ensure transmitter is enabled! */ 226 227 port = 0; 228 base_addr[CyCAR] = (u_char)port; 229 while (base_addr[CyCCR]) 230 ; 231 base_addr[CyCCR] = CyENB_XMTR; 232 233 ier = base_addr[CyIER]; 234 base_addr[CyIER] = CyTxMpty; 235 236 while (1) { 237 if (pcc2chip[PccSCCTICR] & 0x20) 238 { 239 /* We have a Tx int. Acknowledge it */ 240 sink = pcc2chip[PccTPIACKR]; 241 if ((base_addr[CyLICR] >> 2) == port) { 242 if (i == count) { 243 /* Last char of string is now output */ 244 base_addr[CyTEOIR] = CyNOTRANS; 245 break; 246 } 247 if (do_lf) { 248 base_addr[CyTDR] = '\n'; 249 str++; 250 i++; 251 do_lf = 0; 252 } 253 else if (*str == '\n') { 254 base_addr[CyTDR] = '\r'; 255 do_lf = 1; 256 } 257 else { 258 base_addr[CyTDR] = *str++; 259 i++; 260 } 261 base_addr[CyTEOIR] = 0; 262 } 263 else 264 base_addr[CyTEOIR] = CyNOTRANS; 265 } 266 } 267 268 base_addr[CyIER] = ier; 269 } 270 271 #endif 272 273 void __init config_mvme16x(void) 274 { 275 p_bdid p = &mvme_bdid; 276 char id[40]; 277 uint16_t brdno = be16_to_cpu(p->brdno); 278 279 mach_max_dma_address = 0xffffffff; 280 mach_sched_init = mvme16x_sched_init; 281 mach_init_IRQ = mvme16x_init_IRQ; 282 arch_gettimeoffset = mvme16x_gettimeoffset; 283 mach_hwclk = mvme16x_hwclk; 284 mach_set_clock_mmss = mvme16x_set_clock_mmss; 285 mach_reset = mvme16x_reset; 286 mach_get_model = mvme16x_get_model; 287 mach_get_hardware_list = mvme16x_get_hardware_list; 288 289 /* Report board revision */ 290 291 if (strncmp("BDID", p->bdid, 4)) 292 { 293 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n"); 294 while (1) 295 ; 296 } 297 /* Board type is only set by newer versions of vmelilo/tftplilo */ 298 if (vme_brdtype == 0) 299 vme_brdtype = brdno; 300 301 mvme16x_get_model(id); 302 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4, 303 p->rev&0xf, p->yr, p->mth, p->day); 304 if (brdno == 0x0162 || brdno == 0x172) 305 { 306 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 307 308 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA; 309 310 printk ("MVME%x Hardware status:\n", brdno); 311 printk (" CPU Type 68%s040\n", 312 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC"); 313 printk (" CPU clock %dMHz\n", 314 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25); 315 printk (" VMEchip2 %spresent\n", 316 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 317 printk (" SCSI interface %spresent\n", 318 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 319 printk (" Ethernet interface %spresent\n", 320 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 321 } 322 else 323 { 324 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 325 } 326 } 327 328 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id) 329 { 330 unsigned long *new = (unsigned long *)vectors; 331 unsigned long *old = (unsigned long *)0xffe00000; 332 volatile unsigned char uc, *ucp; 333 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 334 335 if (brdno == 0x0162 || brdno == 0x172) 336 { 337 ucp = (volatile unsigned char *)0xfff42043; 338 uc = *ucp | 8; 339 *ucp = uc; 340 } 341 else 342 { 343 *(volatile unsigned long *)0xfff40074 = 0x40000000; 344 } 345 *(new+4) = *(old+4); /* Illegal instruction */ 346 *(new+9) = *(old+9); /* Trace */ 347 *(new+47) = *(old+47); /* Trap #15 */ 348 349 if (brdno == 0x0162 || brdno == 0x172) 350 *(new+0x5e) = *(old+0x5e); /* ABORT switch */ 351 else 352 *(new+0x6e) = *(old+0x6e); /* ABORT switch */ 353 return IRQ_HANDLED; 354 } 355 356 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id) 357 { 358 *(volatile unsigned char *)0xfff4201b |= 8; 359 return tick_handler(irq, dev_id); 360 } 361 362 void mvme16x_sched_init (irq_handler_t timer_routine) 363 { 364 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 365 int irq; 366 367 tick_handler = timer_routine; 368 /* Using PCCchip2 or MC2 chip tick timer 1 */ 369 *(volatile unsigned long *)0xfff42008 = 0; 370 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */ 371 *(volatile unsigned char *)0xfff42017 |= 3; 372 *(volatile unsigned char *)0xfff4201b = 0x16; 373 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0, 374 "timer", mvme16x_timer_int)) 375 panic ("Couldn't register timer int"); 376 377 if (brdno == 0x0162 || brdno == 0x172) 378 irq = MVME162_IRQ_ABORT; 379 else 380 irq = MVME167_IRQ_ABORT; 381 if (request_irq(irq, mvme16x_abort_int, 0, 382 "abort", mvme16x_abort_int)) 383 panic ("Couldn't register abort int"); 384 } 385 386 387 /* This is always executed with interrupts disabled. */ 388 u32 mvme16x_gettimeoffset(void) 389 { 390 return (*(volatile u32 *)0xfff42008) * 1000; 391 } 392 393 int bcd2int (unsigned char b) 394 { 395 return ((b>>4)*10 + (b&15)); 396 } 397 398 int mvme16x_hwclk(int op, struct rtc_time *t) 399 { 400 #warning check me! 401 if (!op) { 402 rtc->ctrl = RTC_READ; 403 t->tm_year = bcd2int (rtc->bcd_year); 404 t->tm_mon = bcd2int (rtc->bcd_mth); 405 t->tm_mday = bcd2int (rtc->bcd_dom); 406 t->tm_hour = bcd2int (rtc->bcd_hr); 407 t->tm_min = bcd2int (rtc->bcd_min); 408 t->tm_sec = bcd2int (rtc->bcd_sec); 409 rtc->ctrl = 0; 410 } 411 return 0; 412 } 413 414 int mvme16x_set_clock_mmss (unsigned long nowtime) 415 { 416 return 0; 417 } 418 419