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/tty.h>
  21 #include <linux/console.h>
  22 #include <linux/linkage.h>
  23 #include <linux/init.h>
  24 #include <linux/major.h>
  25 #include <linux/genhd.h>
  26 #include <linux/rtc.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/module.h>
  29
  30 #include <asm/bootinfo.h>
  31 #include <asm/system.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 static int  mvme16x_get_hardware_list(char *buffer);
  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 extern void mvme16x_waitbut(void);
  52
  53 int bcd2int (unsigned char b);
  54
  55 /* Save tick handler routine pointer, will point to do_timer() in
  56  * kernel/sched.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 mvme16x_parse_bootinfo(const struct bi_record *bi)
  66 {
  67         if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
  68                 return 0;
  69         else
  70                 return 1;
  71 }
  72
  73 void mvme16x_reset(void)
  74 {
  75         printk ("\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", p->brdno, suf);
  93 }
  94
  95
  96 static int mvme16x_get_hardware_list(char *buffer)
  97 {
  98     p_bdid p = &mvme_bdid;
  99     int len = 0;
 100
 101     if (p->brdno == 0x0162 || p->brdno == 0x0172)
 102     {
 103         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 104
 105         len += sprintf (buffer+len, "VMEchip2        %spresent\n",
 106                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 107         len += sprintf (buffer+len, "SCSI interface  %spresent\n",
 108                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 109         len += sprintf (buffer+len, "Ethernet i/f    %spresent\n",
 110                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 111     }
 112     else
 113         *buffer = '\0';
 114
 115     return (len);
 116 }
 117
 118 /*
 119  * This function is called during kernel startup to initialize
 120  * the mvme16x IRQ handling routines.  Should probably ensure
 121  * that the base vectors for the VMEChip2 and PCCChip2 are valid.
 122  */
 123
 124 static void __init mvme16x_init_IRQ (void)
 125 {
 126         m68k_setup_user_interrupt(VEC_USER, 192, NULL);
 127 }
 128
 129 #define pcc2chip        ((volatile u_char *)0xfff42000)
 130 #define PccSCCMICR      0x1d
 131 #define PccSCCTICR      0x1e
 132 #define PccSCCRICR      0x1f
 133
 134 void __init config_mvme16x(void)
 135 {
 136     p_bdid p = &mvme_bdid;
 137     char id[40];
 138
 139     mach_max_dma_address = 0xffffffff;
 140     mach_sched_init      = mvme16x_sched_init;
 141     mach_init_IRQ        = mvme16x_init_IRQ;
 142     mach_gettimeoffset   = mvme16x_gettimeoffset;
 143     mach_hwclk           = mvme16x_hwclk;
 144     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
 145     mach_reset           = mvme16x_reset;
 146     mach_get_model       = mvme16x_get_model;
 147     mach_get_hardware_list = mvme16x_get_hardware_list;
 148
 149     /* Report board revision */
 150
 151     if (strncmp("BDID", p->bdid, 4))
 152     {
 153         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
 154         while (1)
 155                 ;
 156     }
 157     /* Board type is only set by newer versions of vmelilo/tftplilo */
 158     if (vme_brdtype == 0)
 159         vme_brdtype = p->brdno;
 160
 161     mvme16x_get_model(id);
 162     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
 163                                         p->rev&0xf, p->yr, p->mth, p->day);
 164     if (p->brdno == 0x0162 || p->brdno == 0x172)
 165     {
 166         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 167
 168         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
 169
 170         printk ("MVME%x Hardware status:\n", p->brdno);
 171         printk ("    CPU Type           68%s040\n",
 172                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
 173         printk ("    CPU clock          %dMHz\n",
 174                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
 175         printk ("    VMEchip2           %spresent\n",
 176                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 177         printk ("    SCSI interface     %spresent\n",
 178                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 179         printk ("    Ethernet interface %spresent\n",
 180                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 181     }
 182     else
 183     {
 184         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
 185
 186         /* Dont allow any interrupts from the CD2401 until the interrupt */
 187         /* handlers are installed                                        */
 188
 189         pcc2chip[PccSCCMICR] = 0x10;
 190         pcc2chip[PccSCCTICR] = 0x10;
 191         pcc2chip[PccSCCRICR] = 0x10;
 192     }
 193 }
 194
 195 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
 196 {
 197         p_bdid p = &mvme_bdid;
 198         unsigned long *new = (unsigned long *)vectors;
 199         unsigned long *old = (unsigned long *)0xffe00000;
 200         volatile unsigned char uc, *ucp;
 201
 202         if (p->brdno == 0x0162 || p->brdno == 0x172)
 203         {
 204                 ucp = (volatile unsigned char *)0xfff42043;
 205                 uc = *ucp | 8;
 206                 *ucp = uc;
 207         }
 208         else
 209         {
 210                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
 211         }
 212         *(new+4) = *(old+4);            /* Illegal instruction */
 213         *(new+9) = *(old+9);            /* Trace */
 214         *(new+47) = *(old+47);          /* Trap #15 */
 215
 216         if (p->brdno == 0x0162 || p->brdno == 0x172)
 217                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
 218         else
 219                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
 220         return IRQ_HANDLED;
 221 }
 222
 223 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
 224 {
 225     *(volatile unsigned char *)0xfff4201b |= 8;
 226     return tick_handler(irq, dev_id);
 227 }
 228
 229 void mvme16x_sched_init (irq_handler_t timer_routine)
 230 {
 231     p_bdid p = &mvme_bdid;
 232     int irq;
 233
 234     tick_handler = timer_routine;
 235     /* Using PCCchip2 or MC2 chip tick timer 1 */
 236     *(volatile unsigned long *)0xfff42008 = 0;
 237     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
 238     *(volatile unsigned char *)0xfff42017 |= 3;
 239     *(volatile unsigned char *)0xfff4201b = 0x16;
 240     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
 241                                 "timer", mvme16x_timer_int))
 242         panic ("Couldn't register timer int");
 243
 244     if (p->brdno == 0x0162 || p->brdno == 0x172)
 245         irq = MVME162_IRQ_ABORT;
 246     else
 247         irq = MVME167_IRQ_ABORT;
 248     if (request_irq(irq, mvme16x_abort_int, 0,
 249                                 "abort", mvme16x_abort_int))
 250         panic ("Couldn't register abort int");
 251 }
 252
 253
 254 /* This is always executed with interrupts disabled.  */
 255 unsigned long mvme16x_gettimeoffset (void)
 256 {
 257     return (*(volatile unsigned long *)0xfff42008);
 258 }
 259
 260 int bcd2int (unsigned char b)
 261 {
 262         return ((b>>4)*10 + (b&15));
 263 }
 264
 265 int mvme16x_hwclk(int op, struct rtc_time *t)
 266 {
 267 #warning check me!
 268         if (!op) {
 269                 rtc->ctrl = RTC_READ;
 270                 t->tm_year = bcd2int (rtc->bcd_year);
 271                 t->tm_mon  = bcd2int (rtc->bcd_mth);
 272                 t->tm_mday = bcd2int (rtc->bcd_dom);
 273                 t->tm_hour = bcd2int (rtc->bcd_hr);
 274                 t->tm_min  = bcd2int (rtc->bcd_min);
 275                 t->tm_sec  = bcd2int (rtc->bcd_sec);
 276                 rtc->ctrl = 0;
 277         }
 278         return 0;
 279 }
 280
 281 int mvme16x_set_clock_mmss (unsigned long nowtime)
 282 {
 283         return 0;
 284 }
 285