arch/m68k/mvme16x/config.c

   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 static void 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 static struct console cons_info =
 272 {
 273         .name   = "sercon",
 274         .write  = cons_write,
 275         .flags  = CON_PRINTBUFFER | CON_BOOT,
 276         .index  = -1,
 277 };
 278
 279 static void __init mvme16x_early_console(void)
 280 {
 281         register_console(&cons_info);
 282
 283         printk(KERN_INFO "MVME16x: early console registered\n");
 284 }
 285 #endif
 286
 287 void __init config_mvme16x(void)
 288 {
 289     p_bdid p = &mvme_bdid;
 290     char id[40];
 291     uint16_t brdno = be16_to_cpu(p->brdno);
 292
 293     mach_max_dma_address = 0xffffffff;
 294     mach_sched_init      = mvme16x_sched_init;
 295     mach_init_IRQ        = mvme16x_init_IRQ;
 296     arch_gettimeoffset   = mvme16x_gettimeoffset;
 297     mach_hwclk           = mvme16x_hwclk;
 298     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
 299     mach_reset           = mvme16x_reset;
 300     mach_get_model       = mvme16x_get_model;
 301     mach_get_hardware_list = mvme16x_get_hardware_list;
 302
 303     /* Report board revision */
 304
 305     if (strncmp("BDID", p->bdid, 4))
 306     {
 307         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
 308         while (1)
 309                 ;
 310     }
 311     /* Board type is only set by newer versions of vmelilo/tftplilo */
 312     if (vme_brdtype == 0)
 313         vme_brdtype = brdno;
 314
 315     mvme16x_get_model(id);
 316     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
 317                                         p->rev&0xf, p->yr, p->mth, p->day);
 318     if (brdno == 0x0162 || brdno == 0x172)
 319     {
 320         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 321
 322         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
 323
 324         printk ("MVME%x Hardware status:\n", brdno);
 325         printk ("    CPU Type           68%s040\n",
 326                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
 327         printk ("    CPU clock          %dMHz\n",
 328                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
 329         printk ("    VMEchip2           %spresent\n",
 330                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 331         printk ("    SCSI interface     %spresent\n",
 332                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 333         printk ("    Ethernet interface %spresent\n",
 334                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 335     }
 336     else
 337     {
 338         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
 339
 340         /* Dont allow any interrupts from the CD2401 until the interrupt */
 341         /* handlers are installed                                        */
 342
 343         pcc2chip[PccSCCMICR] = 0x10;
 344         pcc2chip[PccSCCTICR] = 0x10;
 345         pcc2chip[PccSCCRICR] = 0x10;
 346 #ifdef CONFIG_EARLY_PRINTK
 347         mvme16x_early_console();
 348 #endif
 349     }
 350 }
 351
 352 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
 353 {
 354         unsigned long *new = (unsigned long *)vectors;
 355         unsigned long *old = (unsigned long *)0xffe00000;
 356         volatile unsigned char uc, *ucp;
 357         uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
 358
 359         if (brdno == 0x0162 || brdno == 0x172)
 360         {
 361                 ucp = (volatile unsigned char *)0xfff42043;
 362                 uc = *ucp | 8;
 363                 *ucp = uc;
 364         }
 365         else
 366         {
 367                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
 368         }
 369         *(new+4) = *(old+4);            /* Illegal instruction */
 370         *(new+9) = *(old+9);            /* Trace */
 371         *(new+47) = *(old+47);          /* Trap #15 */
 372
 373         if (brdno == 0x0162 || brdno == 0x172)
 374                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
 375         else
 376                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
 377         return IRQ_HANDLED;
 378 }
 379
 380 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
 381 {
 382     *(volatile unsigned char *)0xfff4201b |= 8;
 383     return tick_handler(irq, dev_id);
 384 }
 385
 386 void mvme16x_sched_init (irq_handler_t timer_routine)
 387 {
 388     uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
 389     int irq;
 390
 391     tick_handler = timer_routine;
 392     /* Using PCCchip2 or MC2 chip tick timer 1 */
 393     *(volatile unsigned long *)0xfff42008 = 0;
 394     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
 395     *(volatile unsigned char *)0xfff42017 |= 3;
 396     *(volatile unsigned char *)0xfff4201b = 0x16;
 397     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
 398                                 "timer", mvme16x_timer_int))
 399         panic ("Couldn't register timer int");
 400
 401     if (brdno == 0x0162 || brdno == 0x172)
 402         irq = MVME162_IRQ_ABORT;
 403     else
 404         irq = MVME167_IRQ_ABORT;
 405     if (request_irq(irq, mvme16x_abort_int, 0,
 406                                 "abort", mvme16x_abort_int))
 407         panic ("Couldn't register abort int");
 408 }
 409
 410
 411 /* This is always executed with interrupts disabled.  */
 412 u32 mvme16x_gettimeoffset(void)
 413 {
 414     return (*(volatile u32 *)0xfff42008) * 1000;
 415 }
 416
 417 int bcd2int (unsigned char b)
 418 {
 419         return ((b>>4)*10 + (b&15));
 420 }
 421
 422 int mvme16x_hwclk(int op, struct rtc_time *t)
 423 {
 424 #warning check me!
 425         if (!op) {
 426                 rtc->ctrl = RTC_READ;
 427                 t->tm_year = bcd2int (rtc->bcd_year);
 428                 t->tm_mon  = bcd2int (rtc->bcd_mth);
 429                 t->tm_mday = bcd2int (rtc->bcd_dom);
 430                 t->tm_hour = bcd2int (rtc->bcd_hr);
 431                 t->tm_min  = bcd2int (rtc->bcd_min);
 432                 t->tm_sec  = bcd2int (rtc->bcd_sec);
 433                 rtc->ctrl = 0;
 434         }
 435         return 0;
 436 }
 437
 438 int mvme16x_set_clock_mmss (unsigned long nowtime)
 439 {
 440         return 0;
 441 }
 442