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, NULL);
 121 }
 122
 123 #define pcc2chip        ((volatile u_char *)0xfff42000)
 124 #define PccSCCMICR      0x1d
 125 #define PccSCCTICR      0x1e
 126 #define PccSCCRICR      0x1f
 127
 128 void __init config_mvme16x(void)
 129 {
 130     p_bdid p = &mvme_bdid;
 131     char id[40];
 132
 133     mach_max_dma_address = 0xffffffff;
 134     mach_sched_init      = mvme16x_sched_init;
 135     mach_init_IRQ        = mvme16x_init_IRQ;
 136     mach_gettimeoffset   = mvme16x_gettimeoffset;
 137     mach_hwclk           = mvme16x_hwclk;
 138     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
 139     mach_reset           = mvme16x_reset;
 140     mach_get_model       = mvme16x_get_model;
 141     mach_get_hardware_list = mvme16x_get_hardware_list;
 142
 143     /* Report board revision */
 144
 145     if (strncmp("BDID", p->bdid, 4))
 146     {
 147         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
 148         while (1)
 149                 ;
 150     }
 151     /* Board type is only set by newer versions of vmelilo/tftplilo */
 152     if (vme_brdtype == 0)
 153         vme_brdtype = p->brdno;
 154
 155     mvme16x_get_model(id);
 156     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
 157                                         p->rev&0xf, p->yr, p->mth, p->day);
 158     if (p->brdno == 0x0162 || p->brdno == 0x172)
 159     {
 160         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 161
 162         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
 163
 164         printk ("MVME%x Hardware status:\n", p->brdno);
 165         printk ("    CPU Type           68%s040\n",
 166                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
 167         printk ("    CPU clock          %dMHz\n",
 168                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
 169         printk ("    VMEchip2           %spresent\n",
 170                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 171         printk ("    SCSI interface     %spresent\n",
 172                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 173         printk ("    Ethernet interface %spresent\n",
 174                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 175     }
 176     else
 177     {
 178         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
 179
 180         /* Dont allow any interrupts from the CD2401 until the interrupt */
 181         /* handlers are installed                                        */
 182
 183         pcc2chip[PccSCCMICR] = 0x10;
 184         pcc2chip[PccSCCTICR] = 0x10;
 185         pcc2chip[PccSCCRICR] = 0x10;
 186     }
 187 }
 188
 189 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
 190 {
 191         p_bdid p = &mvme_bdid;
 192         unsigned long *new = (unsigned long *)vectors;
 193         unsigned long *old = (unsigned long *)0xffe00000;
 194         volatile unsigned char uc, *ucp;
 195
 196         if (p->brdno == 0x0162 || p->brdno == 0x172)
 197         {
 198                 ucp = (volatile unsigned char *)0xfff42043;
 199                 uc = *ucp | 8;
 200                 *ucp = uc;
 201         }
 202         else
 203         {
 204                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
 205         }
 206         *(new+4) = *(old+4);            /* Illegal instruction */
 207         *(new+9) = *(old+9);            /* Trace */
 208         *(new+47) = *(old+47);          /* Trap #15 */
 209
 210         if (p->brdno == 0x0162 || p->brdno == 0x172)
 211                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
 212         else
 213                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
 214         return IRQ_HANDLED;
 215 }
 216
 217 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
 218 {
 219     *(volatile unsigned char *)0xfff4201b |= 8;
 220     return tick_handler(irq, dev_id);
 221 }
 222
 223 void mvme16x_sched_init (irq_handler_t timer_routine)
 224 {
 225     p_bdid p = &mvme_bdid;
 226     int irq;
 227
 228     tick_handler = timer_routine;
 229     /* Using PCCchip2 or MC2 chip tick timer 1 */
 230     *(volatile unsigned long *)0xfff42008 = 0;
 231     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
 232     *(volatile unsigned char *)0xfff42017 |= 3;
 233     *(volatile unsigned char *)0xfff4201b = 0x16;
 234     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
 235                                 "timer", mvme16x_timer_int))
 236         panic ("Couldn't register timer int");
 237
 238     if (p->brdno == 0x0162 || p->brdno == 0x172)
 239         irq = MVME162_IRQ_ABORT;
 240     else
 241         irq = MVME167_IRQ_ABORT;
 242     if (request_irq(irq, mvme16x_abort_int, 0,
 243                                 "abort", mvme16x_abort_int))
 244         panic ("Couldn't register abort int");
 245 }
 246
 247
 248 /* This is always executed with interrupts disabled.  */
 249 unsigned long mvme16x_gettimeoffset (void)
 250 {
 251     return (*(volatile unsigned long *)0xfff42008);
 252 }
 253
 254 int bcd2int (unsigned char b)
 255 {
 256         return ((b>>4)*10 + (b&15));
 257 }
 258
 259 int mvme16x_hwclk(int op, struct rtc_time *t)
 260 {
 261 #warning check me!
 262         if (!op) {
 263                 rtc->ctrl = RTC_READ;
 264                 t->tm_year = bcd2int (rtc->bcd_year);
 265                 t->tm_mon  = bcd2int (rtc->bcd_mth);
 266                 t->tm_mday = bcd2int (rtc->bcd_dom);
 267                 t->tm_hour = bcd2int (rtc->bcd_hr);
 268                 t->tm_min  = bcd2int (rtc->bcd_min);
 269                 t->tm_sec  = bcd2int (rtc->bcd_sec);
 270                 rtc->ctrl = 0;
 271         }
 272         return 0;
 273 }
 274
 275 int mvme16x_set_clock_mmss (unsigned long nowtime)
 276 {
 277         return 0;
 278 }
 279