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/pgtable.h>
  33 #include <asm/setup.h>
  34 #include <asm/irq.h>
  35 #include <asm/traps.h>
  36 #include <asm/rtc.h>
  37 #include <asm/machdep.h>
  38 #include <asm/mvme16xhw.h>
  39
  40 extern t_bdid mvme_bdid;
  41
  42 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
  43
  44 static void mvme16x_get_model(char *model);
  45 extern void mvme16x_sched_init(irq_handler_t handler);
  46 extern u32 mvme16x_gettimeoffset(void);
  47 extern int mvme16x_hwclk (int, struct rtc_time *);
  48 extern int mvme16x_set_clock_mmss (unsigned long);
  49 extern void mvme16x_reset (void);
  50
  51 int bcd2int (unsigned char b);
  52
  53 /* Save tick handler routine pointer, will point to xtime_update() in
  54  * kernel/time/timekeeping.c, called via mvme16x_process_int() */
  55
  56 static irq_handler_t tick_handler;
  57
  58
  59 unsigned short mvme16x_config;
  60 EXPORT_SYMBOL(mvme16x_config);
  61
  62
  63 int mvme16x_parse_bootinfo(const struct bi_record *bi)
  64 {
  65         if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
  66                 return 0;
  67         else
  68                 return 1;
  69 }
  70
  71 void mvme16x_reset(void)
  72 {
  73         printk ("\r\n\nCalled mvme16x_reset\r\n"
  74                         "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
  75         /* The string of returns is to delay the reset until the whole
  76          * message is output.  Assert reset bit in GCSR */
  77         *(volatile char *)0xfff40107 = 0x80;
  78 }
  79
  80 static void mvme16x_get_model(char *model)
  81 {
  82     p_bdid p = &mvme_bdid;
  83     char suf[4];
  84
  85     suf[1] = p->brdsuffix[0];
  86     suf[2] = p->brdsuffix[1];
  87     suf[3] = '\0';
  88     suf[0] = suf[1] ? '-' : '\0';
  89
  90     sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
  91 }
  92
  93
  94 static void mvme16x_get_hardware_list(struct seq_file *m)
  95 {
  96     p_bdid p = &mvme_bdid;
  97
  98     if (p->brdno == 0x0162 || p->brdno == 0x0172)
  99     {
 100         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 101
 102         seq_printf (m, "VMEchip2        %spresent\n",
 103                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 104         seq_printf (m, "SCSI interface  %spresent\n",
 105                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 106         seq_printf (m, "Ethernet i/f    %spresent\n",
 107                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 108     }
 109 }
 110
 111 /*
 112  * This function is called during kernel startup to initialize
 113  * the mvme16x IRQ handling routines.  Should probably ensure
 114  * that the base vectors for the VMEChip2 and PCCChip2 are valid.
 115  */
 116
 117 static void __init mvme16x_init_IRQ (void)
 118 {
 119         m68k_setup_user_interrupt(VEC_USER, 192);
 120 }
 121
 122 #define pcc2chip        ((volatile u_char *)0xfff42000)
 123 #define PccSCCMICR      0x1d
 124 #define PccSCCTICR      0x1e
 125 #define PccSCCRICR      0x1f
 126 #define PccTPIACKR      0x25
 127
 128 #ifdef CONFIG_EARLY_PRINTK
 129
 130 /**** cd2401 registers ****/
 131 #define CD2401_ADDR     (0xfff45000)
 132
 133 #define CyGFRCR         (0x81)
 134 #define CyCCR           (0x13)
 135 #define      CyCLR_CHAN         (0x40)
 136 #define      CyINIT_CHAN        (0x20)
 137 #define      CyCHIP_RESET       (0x10)
 138 #define      CyENB_XMTR         (0x08)
 139 #define      CyDIS_XMTR         (0x04)
 140 #define      CyENB_RCVR         (0x02)
 141 #define      CyDIS_RCVR         (0x01)
 142 #define CyCAR           (0xee)
 143 #define CyIER           (0x11)
 144 #define      CyMdmCh            (0x80)
 145 #define      CyRxExc            (0x20)
 146 #define      CyRxData           (0x08)
 147 #define      CyTxMpty           (0x02)
 148 #define      CyTxRdy            (0x01)
 149 #define CyLICR          (0x26)
 150 #define CyRISR          (0x89)
 151 #define      CyTIMEOUT          (0x80)
 152 #define      CySPECHAR          (0x70)
 153 #define      CyOVERRUN          (0x08)
 154 #define      CyPARITY           (0x04)
 155 #define      CyFRAME            (0x02)
 156 #define      CyBREAK            (0x01)
 157 #define CyREOIR         (0x84)
 158 #define CyTEOIR         (0x85)
 159 #define CyMEOIR         (0x86)
 160 #define      CyNOTRANS          (0x08)
 161 #define CyRFOC          (0x30)
 162 #define CyRDR           (0xf8)
 163 #define CyTDR           (0xf8)
 164 #define CyMISR          (0x8b)
 165 #define CyRISR          (0x89)
 166 #define CyTISR          (0x8a)
 167 #define CyMSVR1         (0xde)
 168 #define CyMSVR2         (0xdf)
 169 #define      CyDSR              (0x80)
 170 #define      CyDCD              (0x40)
 171 #define      CyCTS              (0x20)
 172 #define      CyDTR              (0x02)
 173 #define      CyRTS              (0x01)
 174 #define CyRTPRL         (0x25)
 175 #define CyRTPRH         (0x24)
 176 #define CyCOR1          (0x10)
 177 #define      CyPARITY_NONE      (0x00)
 178 #define      CyPARITY_E         (0x40)
 179 #define      CyPARITY_O         (0xC0)
 180 #define      Cy_5_BITS          (0x04)
 181 #define      Cy_6_BITS          (0x05)
 182 #define      Cy_7_BITS          (0x06)
 183 #define      Cy_8_BITS          (0x07)
 184 #define CyCOR2          (0x17)
 185 #define      CyETC              (0x20)
 186 #define      CyCtsAE            (0x02)
 187 #define CyCOR3          (0x16)
 188 #define      Cy_1_STOP          (0x02)
 189 #define      Cy_2_STOP          (0x04)
 190 #define CyCOR4          (0x15)
 191 #define      CyREC_FIFO         (0x0F)  /* Receive FIFO threshold */
 192 #define CyCOR5          (0x14)
 193 #define CyCOR6          (0x18)
 194 #define CyCOR7          (0x07)
 195 #define CyRBPR          (0xcb)
 196 #define CyRCOR          (0xc8)
 197 #define CyTBPR          (0xc3)
 198 #define CyTCOR          (0xc0)
 199 #define CySCHR1         (0x1f)
 200 #define CySCHR2         (0x1e)
 201 #define CyTPR           (0xda)
 202 #define CyPILR1         (0xe3)
 203 #define CyPILR2         (0xe0)
 204 #define CyPILR3         (0xe1)
 205 #define CyCMR           (0x1b)
 206 #define      CyASYNC            (0x02)
 207 #define CyLICR          (0x26)
 208 #define CyLIVR          (0x09)
 209 #define CySCRL          (0x23)
 210 #define CySCRH          (0x22)
 211 #define CyTFTC          (0x80)
 212
 213 static void cons_write(struct console *co, const char *str, unsigned count)
 214 {
 215         volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
 216         volatile u_char sink;
 217         u_char ier;
 218         int port;
 219         u_char do_lf = 0;
 220         int i = 0;
 221
 222         /* Ensure transmitter is enabled! */
 223
 224         port = 0;
 225         base_addr[CyCAR] = (u_char)port;
 226         while (base_addr[CyCCR])
 227                 ;
 228         base_addr[CyCCR] = CyENB_XMTR;
 229
 230         ier = base_addr[CyIER];
 231         base_addr[CyIER] = CyTxMpty;
 232
 233         while (1) {
 234                 if (pcc2chip[PccSCCTICR] & 0x20)
 235                 {
 236                         /* We have a Tx int. Acknowledge it */
 237                         sink = pcc2chip[PccTPIACKR];
 238                         if ((base_addr[CyLICR] >> 2) == port) {
 239                                 if (i == count) {
 240                                         /* Last char of string is now output */
 241                                         base_addr[CyTEOIR] = CyNOTRANS;
 242                                         break;
 243                                 }
 244                                 if (do_lf) {
 245                                         base_addr[CyTDR] = '\n';
 246                                         str++;
 247                                         i++;
 248                                         do_lf = 0;
 249                                 }
 250                                 else if (*str == '\n') {
 251                                         base_addr[CyTDR] = '\r';
 252                                         do_lf = 1;
 253                                 }
 254                                 else {
 255                                         base_addr[CyTDR] = *str++;
 256                                         i++;
 257                                 }
 258                                 base_addr[CyTEOIR] = 0;
 259                         }
 260                         else
 261                                 base_addr[CyTEOIR] = CyNOTRANS;
 262                 }
 263         }
 264
 265         base_addr[CyIER] = ier;
 266 }
 267
 268 static struct console cons_info =
 269 {
 270         .name   = "sercon",
 271         .write  = cons_write,
 272         .flags  = CON_PRINTBUFFER | CON_BOOT,
 273         .index  = -1,
 274 };
 275
 276 static void __init mvme16x_early_console(void)
 277 {
 278         register_console(&cons_info);
 279
 280         printk(KERN_INFO "MVME16x: early console registered\n");
 281 }
 282 #endif
 283
 284 void __init config_mvme16x(void)
 285 {
 286     p_bdid p = &mvme_bdid;
 287     char id[40];
 288
 289     mach_max_dma_address = 0xffffffff;
 290     mach_sched_init      = mvme16x_sched_init;
 291     mach_init_IRQ        = mvme16x_init_IRQ;
 292     arch_gettimeoffset   = mvme16x_gettimeoffset;
 293     mach_hwclk           = mvme16x_hwclk;
 294     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
 295     mach_reset           = mvme16x_reset;
 296     mach_get_model       = mvme16x_get_model;
 297     mach_get_hardware_list = mvme16x_get_hardware_list;
 298
 299     /* Report board revision */
 300
 301     if (strncmp("BDID", p->bdid, 4))
 302     {
 303         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
 304         while (1)
 305                 ;
 306     }
 307     /* Board type is only set by newer versions of vmelilo/tftplilo */
 308     if (vme_brdtype == 0)
 309         vme_brdtype = p->brdno;
 310
 311     mvme16x_get_model(id);
 312     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
 313                                         p->rev&0xf, p->yr, p->mth, p->day);
 314     if (p->brdno == 0x0162 || p->brdno == 0x172)
 315     {
 316         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 317
 318         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
 319
 320         printk ("MVME%x Hardware status:\n", p->brdno);
 321         printk ("    CPU Type           68%s040\n",
 322                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
 323         printk ("    CPU clock          %dMHz\n",
 324                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
 325         printk ("    VMEchip2           %spresent\n",
 326                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 327         printk ("    SCSI interface     %spresent\n",
 328                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 329         printk ("    Ethernet interface %spresent\n",
 330                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 331     }
 332     else
 333     {
 334         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
 335
 336         /* Dont allow any interrupts from the CD2401 until the interrupt */
 337         /* handlers are installed                                        */
 338
 339         pcc2chip[PccSCCMICR] = 0x10;
 340         pcc2chip[PccSCCTICR] = 0x10;
 341         pcc2chip[PccSCCRICR] = 0x10;
 342 #ifdef CONFIG_EARLY_PRINTK
 343         mvme16x_early_console();
 344 #endif
 345     }
 346 }
 347
 348 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
 349 {
 350         p_bdid p = &mvme_bdid;
 351         unsigned long *new = (unsigned long *)vectors;
 352         unsigned long *old = (unsigned long *)0xffe00000;
 353         volatile unsigned char uc, *ucp;
 354
 355         if (p->brdno == 0x0162 || p->brdno == 0x172)
 356         {
 357                 ucp = (volatile unsigned char *)0xfff42043;
 358                 uc = *ucp | 8;
 359                 *ucp = uc;
 360         }
 361         else
 362         {
 363                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
 364         }
 365         *(new+4) = *(old+4);            /* Illegal instruction */
 366         *(new+9) = *(old+9);            /* Trace */
 367         *(new+47) = *(old+47);          /* Trap #15 */
 368
 369         if (p->brdno == 0x0162 || p->brdno == 0x172)
 370                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
 371         else
 372                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
 373         return IRQ_HANDLED;
 374 }
 375
 376 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
 377 {
 378     *(volatile unsigned char *)0xfff4201b |= 8;
 379     return tick_handler(irq, dev_id);
 380 }
 381
 382 void mvme16x_sched_init (irq_handler_t timer_routine)
 383 {
 384     p_bdid p = &mvme_bdid;
 385     int irq;
 386
 387     tick_handler = timer_routine;
 388     /* Using PCCchip2 or MC2 chip tick timer 1 */
 389     *(volatile unsigned long *)0xfff42008 = 0;
 390     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
 391     *(volatile unsigned char *)0xfff42017 |= 3;
 392     *(volatile unsigned char *)0xfff4201b = 0x16;
 393     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
 394                                 "timer", mvme16x_timer_int))
 395         panic ("Couldn't register timer int");
 396
 397     if (p->brdno == 0x0162 || p->brdno == 0x172)
 398         irq = MVME162_IRQ_ABORT;
 399     else
 400         irq = MVME167_IRQ_ABORT;
 401     if (request_irq(irq, mvme16x_abort_int, 0,
 402                                 "abort", mvme16x_abort_int))
 403         panic ("Couldn't register abort int");
 404 }
 405
 406
 407 /* This is always executed with interrupts disabled.  */
 408 u32 mvme16x_gettimeoffset(void)
 409 {
 410     return (*(volatile u32 *)0xfff42008) * 1000;
 411 }
 412
 413 int bcd2int (unsigned char b)
 414 {
 415         return ((b>>4)*10 + (b&15));
 416 }
 417
 418 int mvme16x_hwclk(int op, struct rtc_time *t)
 419 {
 420 #warning check me!
 421         if (!op) {
 422                 rtc->ctrl = RTC_READ;
 423                 t->tm_year = bcd2int (rtc->bcd_year);
 424                 t->tm_mon  = bcd2int (rtc->bcd_mth);
 425                 t->tm_mday = bcd2int (rtc->bcd_dom);
 426                 t->tm_hour = bcd2int (rtc->bcd_hr);
 427                 t->tm_min  = bcd2int (rtc->bcd_min);
 428                 t->tm_sec  = bcd2int (rtc->bcd_sec);
 429                 rtc->ctrl = 0;
 430         }
 431         return 0;
 432 }
 433
 434 int mvme16x_set_clock_mmss (unsigned long nowtime)
 435 {
 436         return 0;
 437 }
 438