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/clocksource.h> 23 #include <linux/console.h> 24 #include <linux/linkage.h> 25 #include <linux/init.h> 26 #include <linux/major.h> 27 #include <linux/genhd.h> 28 #include <linux/rtc.h> 29 #include <linux/interrupt.h> 30 #include <linux/module.h> 31 32 #include <asm/bootinfo.h> 33 #include <asm/bootinfo-vme.h> 34 #include <asm/byteorder.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(void); 47 extern int mvme16x_hwclk (int, struct rtc_time *); 48 extern void mvme16x_reset (void); 49 50 int bcd2int (unsigned char b); 51 52 53 unsigned short mvme16x_config; 54 EXPORT_SYMBOL(mvme16x_config); 55 56 57 int __init mvme16x_parse_bootinfo(const struct bi_record *bi) 58 { 59 uint16_t tag = be16_to_cpu(bi->tag); 60 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO) 61 return 0; 62 else 63 return 1; 64 } 65 66 void mvme16x_reset(void) 67 { 68 pr_info("\r\n\nCalled mvme16x_reset\r\n" 69 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r"); 70 /* The string of returns is to delay the reset until the whole 71 * message is output. Assert reset bit in GCSR */ 72 *(volatile char *)0xfff40107 = 0x80; 73 } 74 75 static void mvme16x_get_model(char *model) 76 { 77 p_bdid p = &mvme_bdid; 78 char suf[4]; 79 80 suf[1] = p->brdsuffix[0]; 81 suf[2] = p->brdsuffix[1]; 82 suf[3] = '\0'; 83 suf[0] = suf[1] ? '-' : '\0'; 84 85 sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf); 86 } 87 88 89 static void mvme16x_get_hardware_list(struct seq_file *m) 90 { 91 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 92 93 if (brdno == 0x0162 || brdno == 0x0172) 94 { 95 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 96 97 seq_printf (m, "VMEchip2 %spresent\n", 98 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 99 seq_printf (m, "SCSI interface %spresent\n", 100 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 101 seq_printf (m, "Ethernet i/f %spresent\n", 102 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 103 } 104 } 105 106 /* 107 * This function is called during kernel startup to initialize 108 * the mvme16x IRQ handling routines. Should probably ensure 109 * that the base vectors for the VMEChip2 and PCCChip2 are valid. 110 */ 111 112 static void __init mvme16x_init_IRQ (void) 113 { 114 m68k_setup_user_interrupt(VEC_USER, 192); 115 } 116 117 #define PCC2CHIP (0xfff42000) 118 #define PCCSCCMICR (PCC2CHIP + 0x1d) 119 #define PCCSCCTICR (PCC2CHIP + 0x1e) 120 #define PCCSCCRICR (PCC2CHIP + 0x1f) 121 #define PCCTPIACKR (PCC2CHIP + 0x25) 122 123 #ifdef CONFIG_EARLY_PRINTK 124 125 /**** cd2401 registers ****/ 126 #define CD2401_ADDR (0xfff45000) 127 128 #define CyGFRCR (0x81) 129 #define CyCCR (0x13) 130 #define CyCLR_CHAN (0x40) 131 #define CyINIT_CHAN (0x20) 132 #define CyCHIP_RESET (0x10) 133 #define CyENB_XMTR (0x08) 134 #define CyDIS_XMTR (0x04) 135 #define CyENB_RCVR (0x02) 136 #define CyDIS_RCVR (0x01) 137 #define CyCAR (0xee) 138 #define CyIER (0x11) 139 #define CyMdmCh (0x80) 140 #define CyRxExc (0x20) 141 #define CyRxData (0x08) 142 #define CyTxMpty (0x02) 143 #define CyTxRdy (0x01) 144 #define CyLICR (0x26) 145 #define CyRISR (0x89) 146 #define CyTIMEOUT (0x80) 147 #define CySPECHAR (0x70) 148 #define CyOVERRUN (0x08) 149 #define CyPARITY (0x04) 150 #define CyFRAME (0x02) 151 #define CyBREAK (0x01) 152 #define CyREOIR (0x84) 153 #define CyTEOIR (0x85) 154 #define CyMEOIR (0x86) 155 #define CyNOTRANS (0x08) 156 #define CyRFOC (0x30) 157 #define CyRDR (0xf8) 158 #define CyTDR (0xf8) 159 #define CyMISR (0x8b) 160 #define CyRISR (0x89) 161 #define CyTISR (0x8a) 162 #define CyMSVR1 (0xde) 163 #define CyMSVR2 (0xdf) 164 #define CyDSR (0x80) 165 #define CyDCD (0x40) 166 #define CyCTS (0x20) 167 #define CyDTR (0x02) 168 #define CyRTS (0x01) 169 #define CyRTPRL (0x25) 170 #define CyRTPRH (0x24) 171 #define CyCOR1 (0x10) 172 #define CyPARITY_NONE (0x00) 173 #define CyPARITY_E (0x40) 174 #define CyPARITY_O (0xC0) 175 #define Cy_5_BITS (0x04) 176 #define Cy_6_BITS (0x05) 177 #define Cy_7_BITS (0x06) 178 #define Cy_8_BITS (0x07) 179 #define CyCOR2 (0x17) 180 #define CyETC (0x20) 181 #define CyCtsAE (0x02) 182 #define CyCOR3 (0x16) 183 #define Cy_1_STOP (0x02) 184 #define Cy_2_STOP (0x04) 185 #define CyCOR4 (0x15) 186 #define CyREC_FIFO (0x0F) /* Receive FIFO threshold */ 187 #define CyCOR5 (0x14) 188 #define CyCOR6 (0x18) 189 #define CyCOR7 (0x07) 190 #define CyRBPR (0xcb) 191 #define CyRCOR (0xc8) 192 #define CyTBPR (0xc3) 193 #define CyTCOR (0xc0) 194 #define CySCHR1 (0x1f) 195 #define CySCHR2 (0x1e) 196 #define CyTPR (0xda) 197 #define CyPILR1 (0xe3) 198 #define CyPILR2 (0xe0) 199 #define CyPILR3 (0xe1) 200 #define CyCMR (0x1b) 201 #define CyASYNC (0x02) 202 #define CyLICR (0x26) 203 #define CyLIVR (0x09) 204 #define CySCRL (0x23) 205 #define CySCRH (0x22) 206 #define CyTFTC (0x80) 207 208 void mvme16x_cons_write(struct console *co, const char *str, unsigned count) 209 { 210 volatile unsigned char *base_addr = (u_char *)CD2401_ADDR; 211 volatile u_char sink; 212 u_char ier; 213 int port; 214 u_char do_lf = 0; 215 int i = 0; 216 217 /* Ensure transmitter is enabled! */ 218 219 port = 0; 220 base_addr[CyCAR] = (u_char)port; 221 while (base_addr[CyCCR]) 222 ; 223 base_addr[CyCCR] = CyENB_XMTR; 224 225 ier = base_addr[CyIER]; 226 base_addr[CyIER] = CyTxMpty; 227 228 while (1) { 229 if (in_8(PCCSCCTICR) & 0x20) 230 { 231 /* We have a Tx int. Acknowledge it */ 232 sink = in_8(PCCTPIACKR); 233 if ((base_addr[CyLICR] >> 2) == port) { 234 if (i == count) { 235 /* Last char of string is now output */ 236 base_addr[CyTEOIR] = CyNOTRANS; 237 break; 238 } 239 if (do_lf) { 240 base_addr[CyTDR] = '\n'; 241 str++; 242 i++; 243 do_lf = 0; 244 } 245 else if (*str == '\n') { 246 base_addr[CyTDR] = '\r'; 247 do_lf = 1; 248 } 249 else { 250 base_addr[CyTDR] = *str++; 251 i++; 252 } 253 base_addr[CyTEOIR] = 0; 254 } 255 else 256 base_addr[CyTEOIR] = CyNOTRANS; 257 } 258 } 259 260 base_addr[CyIER] = ier; 261 } 262 263 #endif 264 265 void __init config_mvme16x(void) 266 { 267 p_bdid p = &mvme_bdid; 268 char id[40]; 269 uint16_t brdno = be16_to_cpu(p->brdno); 270 271 mach_sched_init = mvme16x_sched_init; 272 mach_init_IRQ = mvme16x_init_IRQ; 273 mach_hwclk = mvme16x_hwclk; 274 mach_reset = mvme16x_reset; 275 mach_get_model = mvme16x_get_model; 276 mach_get_hardware_list = mvme16x_get_hardware_list; 277 278 /* Report board revision */ 279 280 if (strncmp("BDID", p->bdid, 4)) 281 { 282 pr_crit("Bug call .BRD_ID returned garbage - giving up\n"); 283 while (1) 284 ; 285 } 286 /* Board type is only set by newer versions of vmelilo/tftplilo */ 287 if (vme_brdtype == 0) 288 vme_brdtype = brdno; 289 290 mvme16x_get_model(id); 291 pr_info("BRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev >> 4, 292 p->rev & 0xf, p->yr, p->mth, p->day); 293 if (brdno == 0x0162 || brdno == 0x172) 294 { 295 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; 296 297 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA; 298 299 pr_info("MVME%x Hardware status:\n", brdno); 300 pr_info(" CPU Type 68%s040\n", 301 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC"); 302 pr_info(" CPU clock %dMHz\n", 303 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25); 304 pr_info(" VMEchip2 %spresent\n", 305 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); 306 pr_info(" SCSI interface %spresent\n", 307 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); 308 pr_info(" Ethernet interface %spresent\n", 309 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); 310 } 311 else 312 { 313 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401; 314 } 315 } 316 317 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id) 318 { 319 unsigned long *new = (unsigned long *)vectors; 320 unsigned long *old = (unsigned long *)0xffe00000; 321 volatile unsigned char uc, *ucp; 322 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 323 324 if (brdno == 0x0162 || brdno == 0x172) 325 { 326 ucp = (volatile unsigned char *)0xfff42043; 327 uc = *ucp | 8; 328 *ucp = uc; 329 } 330 else 331 { 332 *(volatile unsigned long *)0xfff40074 = 0x40000000; 333 } 334 *(new+4) = *(old+4); /* Illegal instruction */ 335 *(new+9) = *(old+9); /* Trace */ 336 *(new+47) = *(old+47); /* Trap #15 */ 337 338 if (brdno == 0x0162 || brdno == 0x172) 339 *(new+0x5e) = *(old+0x5e); /* ABORT switch */ 340 else 341 *(new+0x6e) = *(old+0x6e); /* ABORT switch */ 342 return IRQ_HANDLED; 343 } 344 345 static u64 mvme16x_read_clk(struct clocksource *cs); 346 347 static struct clocksource mvme16x_clk = { 348 .name = "pcc", 349 .rating = 250, 350 .read = mvme16x_read_clk, 351 .mask = CLOCKSOURCE_MASK(32), 352 .flags = CLOCK_SOURCE_IS_CONTINUOUS, 353 }; 354 355 static u32 clk_total; 356 357 #define PCC_TIMER_CLOCK_FREQ 1000000 358 #define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ) 359 360 #define PCCTCMP1 (PCC2CHIP + 0x04) 361 #define PCCTCNT1 (PCC2CHIP + 0x08) 362 #define PCCTOVR1 (PCC2CHIP + 0x17) 363 #define PCCTIC1 (PCC2CHIP + 0x1b) 364 365 #define PCCTOVR1_TIC_EN 0x01 366 #define PCCTOVR1_COC_EN 0x02 367 #define PCCTOVR1_OVR_CLR 0x04 368 369 #define PCCTIC1_INT_CLR 0x08 370 #define PCCTIC1_INT_EN 0x10 371 372 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id) 373 { 374 unsigned long flags; 375 376 local_irq_save(flags); 377 out_8(PCCTIC1, in_8(PCCTIC1) | PCCTIC1_INT_CLR); 378 out_8(PCCTOVR1, PCCTOVR1_OVR_CLR); 379 clk_total += PCC_TIMER_CYCLES; 380 legacy_timer_tick(1); 381 local_irq_restore(flags); 382 383 return IRQ_HANDLED; 384 } 385 386 void mvme16x_sched_init(void) 387 { 388 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno); 389 int irq; 390 391 /* Using PCCchip2 or MC2 chip tick timer 1 */ 392 out_be32(PCCTCNT1, 0); 393 out_be32(PCCTCMP1, PCC_TIMER_CYCLES); 394 out_8(PCCTOVR1, in_8(PCCTOVR1) | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN); 395 out_8(PCCTIC1, PCCTIC1_INT_EN | 6); 396 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, IRQF_TIMER, "timer", 397 NULL)) 398 panic ("Couldn't register timer int"); 399 400 clocksource_register_hz(&mvme16x_clk, PCC_TIMER_CLOCK_FREQ); 401 402 if (brdno == 0x0162 || brdno == 0x172) 403 irq = MVME162_IRQ_ABORT; 404 else 405 irq = MVME167_IRQ_ABORT; 406 if (request_irq(irq, mvme16x_abort_int, 0, 407 "abort", mvme16x_abort_int)) 408 panic ("Couldn't register abort int"); 409 } 410 411 static u64 mvme16x_read_clk(struct clocksource *cs) 412 { 413 unsigned long flags; 414 u8 overflow, tmp; 415 u32 ticks; 416 417 local_irq_save(flags); 418 tmp = in_8(PCCTOVR1) >> 4; 419 ticks = in_be32(PCCTCNT1); 420 overflow = in_8(PCCTOVR1) >> 4; 421 if (overflow != tmp) 422 ticks = in_be32(PCCTCNT1); 423 ticks += overflow * PCC_TIMER_CYCLES; 424 ticks += clk_total; 425 local_irq_restore(flags); 426 427 return ticks; 428 } 429 430 int bcd2int (unsigned char b) 431 { 432 return ((b>>4)*10 + (b&15)); 433 } 434 435 int mvme16x_hwclk(int op, struct rtc_time *t) 436 { 437 #warning check me! 438 if (!op) { 439 rtc->ctrl = RTC_READ; 440 t->tm_year = bcd2int (rtc->bcd_year); 441 t->tm_mon = bcd2int(rtc->bcd_mth) - 1; 442 t->tm_mday = bcd2int (rtc->bcd_dom); 443 t->tm_hour = bcd2int (rtc->bcd_hr); 444 t->tm_min = bcd2int (rtc->bcd_min); 445 t->tm_sec = bcd2int (rtc->bcd_sec); 446 rtc->ctrl = 0; 447 if (t->tm_year < 70) 448 t->tm_year += 100; 449 } 450 return 0; 451 } 452