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/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