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/system.h>
  33 #include <asm/pgtable.h>
  34 #include <asm/setup.h>
  35 #include <asm/irq.h>
  36 #include <asm/traps.h>
  37 #include <asm/rtc.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 unsigned long 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 mvme16x_parse_bootinfo(const struct bi_record *bi)
  65 {
  66         if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
  67                 return 0;
  68         else
  69                 return 1;
  70 }
  71
  72 void mvme16x_reset(void)
  73 {
  74         printk ("\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", p->brdno, suf);
  92 }
  93
  94
  95 static void mvme16x_get_hardware_list(struct seq_file *m)
  96 {
  97     p_bdid p = &mvme_bdid;
  98
  99     if (p->brdno == 0x0162 || p->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 static void 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 static struct console cons_info =
 270 {
 271         .name   = "sercon",
 272         .write  = cons_write,
 273         .flags  = CON_PRINTBUFFER | CON_BOOT,
 274         .index  = -1,
 275 };
 276
 277 static void __init mvme16x_early_console(void)
 278 {
 279         register_console(&cons_info);
 280
 281         printk(KERN_INFO "MVME16x: early console registered\n");
 282 }
 283 #endif
 284
 285 void __init config_mvme16x(void)
 286 {
 287     p_bdid p = &mvme_bdid;
 288     char id[40];
 289
 290     mach_max_dma_address = 0xffffffff;
 291     mach_sched_init      = mvme16x_sched_init;
 292     mach_init_IRQ        = mvme16x_init_IRQ;
 293     mach_gettimeoffset   = mvme16x_gettimeoffset;
 294     mach_hwclk           = mvme16x_hwclk;
 295     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
 296     mach_reset           = mvme16x_reset;
 297     mach_get_model       = mvme16x_get_model;
 298     mach_get_hardware_list = mvme16x_get_hardware_list;
 299
 300     /* Report board revision */
 301
 302     if (strncmp("BDID", p->bdid, 4))
 303     {
 304         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
 305         while (1)
 306                 ;
 307     }
 308     /* Board type is only set by newer versions of vmelilo/tftplilo */
 309     if (vme_brdtype == 0)
 310         vme_brdtype = p->brdno;
 311
 312     mvme16x_get_model(id);
 313     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
 314                                         p->rev&0xf, p->yr, p->mth, p->day);
 315     if (p->brdno == 0x0162 || p->brdno == 0x172)
 316     {
 317         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 318
 319         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
 320
 321         printk ("MVME%x Hardware status:\n", p->brdno);
 322         printk ("    CPU Type           68%s040\n",
 323                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
 324         printk ("    CPU clock          %dMHz\n",
 325                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
 326         printk ("    VMEchip2           %spresent\n",
 327                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 328         printk ("    SCSI interface     %spresent\n",
 329                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 330         printk ("    Ethernet interface %spresent\n",
 331                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 332     }
 333     else
 334     {
 335         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
 336
 337         /* Dont allow any interrupts from the CD2401 until the interrupt */
 338         /* handlers are installed                                        */
 339
 340         pcc2chip[PccSCCMICR] = 0x10;
 341         pcc2chip[PccSCCTICR] = 0x10;
 342         pcc2chip[PccSCCRICR] = 0x10;
 343 #ifdef CONFIG_EARLY_PRINTK
 344         mvme16x_early_console();
 345 #endif
 346     }
 347 }
 348
 349 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
 350 {
 351         p_bdid p = &mvme_bdid;
 352         unsigned long *new = (unsigned long *)vectors;
 353         unsigned long *old = (unsigned long *)0xffe00000;
 354         volatile unsigned char uc, *ucp;
 355
 356         if (p->brdno == 0x0162 || p->brdno == 0x172)
 357         {
 358                 ucp = (volatile unsigned char *)0xfff42043;
 359                 uc = *ucp | 8;
 360                 *ucp = uc;
 361         }
 362         else
 363         {
 364                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
 365         }
 366         *(new+4) = *(old+4);            /* Illegal instruction */
 367         *(new+9) = *(old+9);            /* Trace */
 368         *(new+47) = *(old+47);          /* Trap #15 */
 369
 370         if (p->brdno == 0x0162 || p->brdno == 0x172)
 371                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
 372         else
 373                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
 374         return IRQ_HANDLED;
 375 }
 376
 377 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
 378 {
 379     *(volatile unsigned char *)0xfff4201b |= 8;
 380     return tick_handler(irq, dev_id);
 381 }
 382
 383 void mvme16x_sched_init (irq_handler_t timer_routine)
 384 {
 385     p_bdid p = &mvme_bdid;
 386     int irq;
 387
 388     tick_handler = timer_routine;
 389     /* Using PCCchip2 or MC2 chip tick timer 1 */
 390     *(volatile unsigned long *)0xfff42008 = 0;
 391     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
 392     *(volatile unsigned char *)0xfff42017 |= 3;
 393     *(volatile unsigned char *)0xfff4201b = 0x16;
 394     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
 395                                 "timer", mvme16x_timer_int))
 396         panic ("Couldn't register timer int");
 397
 398     if (p->brdno == 0x0162 || p->brdno == 0x172)
 399         irq = MVME162_IRQ_ABORT;
 400     else
 401         irq = MVME167_IRQ_ABORT;
 402     if (request_irq(irq, mvme16x_abort_int, 0,
 403                                 "abort", mvme16x_abort_int))
 404         panic ("Couldn't register abort int");
 405 }
 406
 407
 408 /* This is always executed with interrupts disabled.  */
 409 unsigned long mvme16x_gettimeoffset (void)
 410 {
 411     return (*(volatile unsigned long *)0xfff42008);
 412 }
 413
 414 int bcd2int (unsigned char b)
 415 {
 416         return ((b>>4)*10 + (b&15));
 417 }
 418
 419 int mvme16x_hwclk(int op, struct rtc_time *t)
 420 {
 421 #warning check me!
 422         if (!op) {
 423                 rtc->ctrl = RTC_READ;
 424                 t->tm_year = bcd2int (rtc->bcd_year);
 425                 t->tm_mon  = bcd2int (rtc->bcd_mth);
 426                 t->tm_mday = bcd2int (rtc->bcd_dom);
 427                 t->tm_hour = bcd2int (rtc->bcd_hr);
 428                 t->tm_min  = bcd2int (rtc->bcd_min);
 429                 t->tm_sec  = bcd2int (rtc->bcd_sec);
 430                 rtc->ctrl = 0;
 431         }
 432         return 0;
 433 }
 434
 435 int mvme16x_set_clock_mmss (unsigned long nowtime)
 436 {
 437         return 0;
 438 }
 439