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