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
  29 #include <asm/bootinfo.h>
  30 #include <asm/system.h>
  31 #include <asm/pgtable.h>
  32 #include <asm/setup.h>
  33 #include <asm/irq.h>
  34 #include <asm/traps.h>
  35 #include <asm/rtc.h>
  36 #include <asm/machdep.h>
  37 #include <asm/mvme16xhw.h>
  38
  39 extern t_bdid mvme_bdid;
  40
  41 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
  42
  43 extern irqreturn_t mvme16x_process_int (int level, struct pt_regs *regs);
  44 extern void mvme16x_init_IRQ (void);
  45 extern void mvme16x_free_irq (unsigned int, void *);
  46 extern int show_mvme16x_interrupts (struct seq_file *, void *);
  47 extern void mvme16x_enable_irq (unsigned int);
  48 extern void mvme16x_disable_irq (unsigned int);
  49 static void mvme16x_get_model(char *model);
  50 static int  mvme16x_get_hardware_list(char *buffer);
  51 extern int  mvme16x_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
  52 extern void mvme16x_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
  53 extern unsigned long mvme16x_gettimeoffset (void);
  54 extern int mvme16x_hwclk (int, struct rtc_time *);
  55 extern int mvme16x_set_clock_mmss (unsigned long);
  56 extern void mvme16x_reset (void);
  57 extern void mvme16x_waitbut(void);
  58
  59 int bcd2int (unsigned char b);
  60
  61 /* Save tick handler routine pointer, will point to do_timer() in
  62  * kernel/sched.c, called via mvme16x_process_int() */
  63
  64 static irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);
  65
  66
  67 unsigned short mvme16x_config;
  68
  69
  70 int mvme16x_parse_bootinfo(const struct bi_record *bi)
  71 {
  72         if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
  73                 return 0;
  74         else
  75                 return 1;
  76 }
  77
  78 void mvme16x_reset(void)
  79 {
  80         printk ("\r\n\nCalled mvme16x_reset\r\n"
  81                         "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
  82         /* The string of returns is to delay the reset until the whole
  83          * message is output.  Assert reset bit in GCSR */
  84         *(volatile char *)0xfff40107 = 0x80;
  85 }
  86
  87 static void mvme16x_get_model(char *model)
  88 {
  89     p_bdid p = &mvme_bdid;
  90     char suf[4];
  91
  92     suf[1] = p->brdsuffix[0];
  93     suf[2] = p->brdsuffix[1];
  94     suf[3] = '\0';
  95     suf[0] = suf[1] ? '-' : '\0';
  96
  97     sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
  98 }
  99
 100
 101 static int mvme16x_get_hardware_list(char *buffer)
 102 {
 103     p_bdid p = &mvme_bdid;
 104     int len = 0;
 105
 106     if (p->brdno == 0x0162 || p->brdno == 0x0172)
 107     {
 108         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 109
 110         len += sprintf (buffer+len, "VMEchip2        %spresent\n",
 111                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 112         len += sprintf (buffer+len, "SCSI interface  %spresent\n",
 113                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 114         len += sprintf (buffer+len, "Ethernet i/f    %spresent\n",
 115                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 116     }
 117     else
 118         *buffer = '\0';
 119
 120     return (len);
 121 }
 122
 123
 124 #define pcc2chip        ((volatile u_char *)0xfff42000)
 125 #define PccSCCMICR      0x1d
 126 #define PccSCCTICR      0x1e
 127 #define PccSCCRICR      0x1f
 128
 129 void __init config_mvme16x(void)
 130 {
 131     p_bdid p = &mvme_bdid;
 132     char id[40];
 133
 134     mach_max_dma_address = 0xffffffff;
 135     mach_sched_init      = mvme16x_sched_init;
 136     mach_init_IRQ        = mvme16x_init_IRQ;
 137     mach_gettimeoffset   = mvme16x_gettimeoffset;
 138     mach_hwclk           = mvme16x_hwclk;
 139     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
 140     mach_reset           = mvme16x_reset;
 141     mach_free_irq        = mvme16x_free_irq;
 142     mach_process_int     = mvme16x_process_int;
 143     mach_get_irq_list    = show_mvme16x_interrupts;
 144     mach_request_irq     = mvme16x_request_irq;
 145     enable_irq           = mvme16x_enable_irq;
 146     disable_irq          = mvme16x_disable_irq;
 147     mach_get_model       = mvme16x_get_model;
 148     mach_get_hardware_list = mvme16x_get_hardware_list;
 149
 150     /* Report board revision */
 151
 152     if (strncmp("BDID", p->bdid, 4))
 153     {
 154         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
 155         while (1)
 156                 ;
 157     }
 158     /* Board type is only set by newer versions of vmelilo/tftplilo */
 159     if (vme_brdtype == 0)
 160         vme_brdtype = p->brdno;
 161
 162     mvme16x_get_model(id);
 163     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
 164                                         p->rev&0xf, p->yr, p->mth, p->day);
 165     if (p->brdno == 0x0162 || p->brdno == 0x172)
 166     {
 167         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 168
 169         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
 170
 171         printk ("MVME%x Hardware status:\n", p->brdno);
 172         printk ("    CPU Type           68%s040\n",
 173                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
 174         printk ("    CPU clock          %dMHz\n",
 175                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
 176         printk ("    VMEchip2           %spresent\n",
 177                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 178         printk ("    SCSI interface     %spresent\n",
 179                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
 180         printk ("    Ethernet interface %spresent\n",
 181                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
 182     }
 183     else
 184     {
 185         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
 186
 187         /* Dont allow any interrupts from the CD2401 until the interrupt */
 188         /* handlers are installed                                        */
 189
 190         pcc2chip[PccSCCMICR] = 0x10;
 191         pcc2chip[PccSCCTICR] = 0x10;
 192         pcc2chip[PccSCCRICR] = 0x10;
 193     }
 194 }
 195
 196 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id, struct pt_regs *fp)
 197 {
 198         p_bdid p = &mvme_bdid;
 199         unsigned long *new = (unsigned long *)vectors;
 200         unsigned long *old = (unsigned long *)0xffe00000;
 201         volatile unsigned char uc, *ucp;
 202
 203         if (p->brdno == 0x0162 || p->brdno == 0x172)
 204         {
 205                 ucp = (volatile unsigned char *)0xfff42043;
 206                 uc = *ucp | 8;
 207                 *ucp = uc;
 208         }
 209         else
 210         {
 211                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
 212         }
 213         *(new+4) = *(old+4);            /* Illegal instruction */
 214         *(new+9) = *(old+9);            /* Trace */
 215         *(new+47) = *(old+47);          /* Trap #15 */
 216
 217         if (p->brdno == 0x0162 || p->brdno == 0x172)
 218                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
 219         else
 220                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
 221         return IRQ_HANDLED;
 222 }
 223
 224 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id, struct pt_regs *fp)
 225 {
 226     *(volatile unsigned char *)0xfff4201b |= 8;
 227     return tick_handler(irq, dev_id, fp);
 228 }
 229
 230 void mvme16x_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
 231 {
 232     p_bdid p = &mvme_bdid;
 233     int irq;
 234
 235     tick_handler = timer_routine;
 236     /* Using PCCchip2 or MC2 chip tick timer 1 */
 237     *(volatile unsigned long *)0xfff42008 = 0;
 238     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
 239     *(volatile unsigned char *)0xfff42017 |= 3;
 240     *(volatile unsigned char *)0xfff4201b = 0x16;
 241     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
 242                                 "timer", mvme16x_timer_int))
 243         panic ("Couldn't register timer int");
 244
 245     if (p->brdno == 0x0162 || p->brdno == 0x172)
 246         irq = MVME162_IRQ_ABORT;
 247     else
 248         irq = MVME167_IRQ_ABORT;
 249     if (request_irq(irq, mvme16x_abort_int, 0,
 250                                 "abort", mvme16x_abort_int))
 251         panic ("Couldn't register abort int");
 252 }
 253
 254
 255 /* This is always executed with interrupts disabled.  */
 256 unsigned long mvme16x_gettimeoffset (void)
 257 {
 258     return (*(volatile unsigned long *)0xfff42008);
 259 }
 260
 261 int bcd2int (unsigned char b)
 262 {
 263         return ((b>>4)*10 + (b&15));
 264 }
 265
 266 int mvme16x_hwclk(int op, struct rtc_time *t)
 267 {
 268 #warning check me!
 269         if (!op) {
 270                 rtc->ctrl = RTC_READ;
 271                 t->tm_year = bcd2int (rtc->bcd_year);
 272                 t->tm_mon  = bcd2int (rtc->bcd_mth);
 273                 t->tm_mday = bcd2int (rtc->bcd_dom);
 274                 t->tm_hour = bcd2int (rtc->bcd_hr);
 275                 t->tm_min  = bcd2int (rtc->bcd_min);
 276                 t->tm_sec  = bcd2int (rtc->bcd_sec);
 277                 rtc->ctrl = 0;
 278         }
 279         return 0;
 280 }
 281
 282 int mvme16x_set_clock_mmss (unsigned long nowtime)
 283 {
 284         return 0;
 285 }
 286