arch/m68k/hp300/config.c

   1 /*
   2  *  linux/arch/m68k/hp300/config.c
   3  *
   4  *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
   5  *
   6  *  This file contains the HP300-specific initialisation code.  It gets
   7  *  called by setup.c.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/string.h>
  13 #include <linux/kernel.h>
  14 #include <linux/console.h>
  15
  16 #include <asm/bootinfo.h>
  17 #include <asm/machdep.h>
  18 #include <asm/blinken.h>
  19 #include <asm/io.h>                               /* readb() and writeb() */
  20 #include <asm/hp300hw.h>
  21 #include <asm/rtc.h>
  22
  23 #include "time.h"
  24
  25 unsigned long hp300_model;
  26 unsigned long hp300_uart_scode = -1;
  27 unsigned char hp300_ledstate;
  28 EXPORT_SYMBOL(hp300_ledstate);
  29
  30 static char s_hp330[] __initdata = "330";
  31 static char s_hp340[] __initdata = "340";
  32 static char s_hp345[] __initdata = "345";
  33 static char s_hp360[] __initdata = "360";
  34 static char s_hp370[] __initdata = "370";
  35 static char s_hp375[] __initdata = "375";
  36 static char s_hp380[] __initdata = "380";
  37 static char s_hp385[] __initdata = "385";
  38 static char s_hp400[] __initdata = "400";
  39 static char s_hp425t[] __initdata = "425t";
  40 static char s_hp425s[] __initdata = "425s";
  41 static char s_hp425e[] __initdata = "425e";
  42 static char s_hp433t[] __initdata = "433t";
  43 static char s_hp433s[] __initdata = "433s";
  44 static char *hp300_models[] __initdata = {
  45         [HP_320]        = NULL,
  46         [HP_330]        = s_hp330,
  47         [HP_340]        = s_hp340,
  48         [HP_345]        = s_hp345,
  49         [HP_350]        = NULL,
  50         [HP_360]        = s_hp360,
  51         [HP_370]        = s_hp370,
  52         [HP_375]        = s_hp375,
  53         [HP_380]        = s_hp380,
  54         [HP_385]        = s_hp385,
  55         [HP_400]        = s_hp400,
  56         [HP_425T]       = s_hp425t,
  57         [HP_425S]       = s_hp425s,
  58         [HP_425E]       = s_hp425e,
  59         [HP_433T]       = s_hp433t,
  60         [HP_433S]       = s_hp433s,
  61 };
  62
  63 static char hp300_model_name[13] = "HP9000/";
  64
  65 extern void hp300_reset(void);
  66 #ifdef CONFIG_SERIAL_8250_CONSOLE
  67 extern int hp300_setup_serial_console(void) __init;
  68 #endif
  69
  70 int __init hp300_parse_bootinfo(const struct bi_record *record)
  71 {
  72         int unknown = 0;
  73         const unsigned long *data = record->data;
  74
  75         switch (record->tag) {
  76         case BI_HP300_MODEL:
  77                 hp300_model = *data;
  78                 break;
  79
  80         case BI_HP300_UART_SCODE:
  81                 hp300_uart_scode = *data;
  82                 break;
  83
  84         case BI_HP300_UART_ADDR:
  85                 /* serial port address: ignored here */
  86                 break;
  87
  88         default:
  89                 unknown = 1;
  90         }
  91
  92         return unknown;
  93 }
  94
  95 #ifdef CONFIG_HEARTBEAT
  96 static void hp300_pulse(int x)
  97 {
  98         if (x)
  99                 blinken_leds(0x10, 0);
 100         else
 101                 blinken_leds(0, 0x10);
 102 }
 103 #endif
 104
 105 static void hp300_get_model(char *model)
 106 {
 107         strcpy(model, hp300_model_name);
 108 }
 109
 110 #define RTCBASE                 0xf0420000
 111 #define RTC_DATA                0x1
 112 #define RTC_CMD                 0x3
 113
 114 #define RTC_BUSY                0x02
 115 #define RTC_DATA_RDY            0x01
 116
 117 #define rtc_busy()              (in_8(RTCBASE + RTC_CMD) & RTC_BUSY)
 118 #define rtc_data_available()    (in_8(RTCBASE + RTC_CMD) & RTC_DATA_RDY)
 119 #define rtc_status()            (in_8(RTCBASE + RTC_CMD))
 120 #define rtc_command(x)          out_8(RTCBASE + RTC_CMD, (x))
 121 #define rtc_read_data()         (in_8(RTCBASE + RTC_DATA))
 122 #define rtc_write_data(x)       out_8(RTCBASE + RTC_DATA, (x))
 123
 124 #define RTC_SETREG      0xe0
 125 #define RTC_WRITEREG    0xc2
 126 #define RTC_READREG     0xc3
 127
 128 #define RTC_REG_SEC2    0
 129 #define RTC_REG_SEC1    1
 130 #define RTC_REG_MIN2    2
 131 #define RTC_REG_MIN1    3
 132 #define RTC_REG_HOUR2   4
 133 #define RTC_REG_HOUR1   5
 134 #define RTC_REG_WDAY    6
 135 #define RTC_REG_DAY2    7
 136 #define RTC_REG_DAY1    8
 137 #define RTC_REG_MON2    9
 138 #define RTC_REG_MON1    10
 139 #define RTC_REG_YEAR2   11
 140 #define RTC_REG_YEAR1   12
 141
 142 #define RTC_HOUR1_24HMODE 0x8
 143
 144 #define RTC_STAT_MASK   0xf0
 145 #define RTC_STAT_RDY    0x40
 146
 147 static inline unsigned char hp300_rtc_read(unsigned char reg)
 148 {
 149         unsigned char s, ret;
 150         unsigned long flags;
 151
 152         local_irq_save(flags);
 153
 154         while (rtc_busy());
 155         rtc_command(RTC_SETREG);
 156         while (rtc_busy());
 157         rtc_write_data(reg);
 158         while (rtc_busy());
 159         rtc_command(RTC_READREG);
 160
 161         do {
 162                 while (!rtc_data_available());
 163                 s = rtc_status();
 164                 ret = rtc_read_data();
 165         } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 166
 167         local_irq_restore(flags);
 168
 169         return ret;
 170 }
 171
 172 static inline unsigned char hp300_rtc_write(unsigned char reg,
 173                                             unsigned char val)
 174 {
 175         unsigned char s, ret;
 176         unsigned long flags;
 177
 178         local_irq_save(flags);
 179
 180         while (rtc_busy());
 181         rtc_command(RTC_SETREG);
 182         while (rtc_busy());
 183         rtc_write_data((val << 4) | reg);
 184         while (rtc_busy());
 185         rtc_command(RTC_WRITEREG);
 186         while (rtc_busy());
 187         rtc_command(RTC_READREG);
 188
 189         do {
 190                 while (!rtc_data_available());
 191                 s = rtc_status();
 192                 ret = rtc_read_data();
 193         } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 194
 195         local_irq_restore(flags);
 196
 197         return ret;
 198 }
 199
 200 static int hp300_hwclk(int op, struct rtc_time *t)
 201 {
 202         if (!op) { /* read */
 203                 t->tm_sec  = hp300_rtc_read(RTC_REG_SEC1) * 10 +
 204                         hp300_rtc_read(RTC_REG_SEC2);
 205                 t->tm_min  = hp300_rtc_read(RTC_REG_MIN1) * 10 +
 206                         hp300_rtc_read(RTC_REG_MIN2);
 207                 t->tm_hour = (hp300_rtc_read(RTC_REG_HOUR1) & 3) * 10 +
 208                         hp300_rtc_read(RTC_REG_HOUR2);
 209                 t->tm_wday = -1;
 210                 t->tm_mday = hp300_rtc_read(RTC_REG_DAY1) * 10 +
 211                         hp300_rtc_read(RTC_REG_DAY2);
 212                 t->tm_mon  = hp300_rtc_read(RTC_REG_MON1) * 10 +
 213                         hp300_rtc_read(RTC_REG_MON2) - 1;
 214                 t->tm_year = hp300_rtc_read(RTC_REG_YEAR1) * 10 +
 215                         hp300_rtc_read(RTC_REG_YEAR2);
 216                 if (t->tm_year <= 69)
 217                         t->tm_year += 100;
 218         } else {
 219                 hp300_rtc_write(RTC_REG_SEC1, t->tm_sec / 10);
 220                 hp300_rtc_write(RTC_REG_SEC2, t->tm_sec % 10);
 221                 hp300_rtc_write(RTC_REG_MIN1, t->tm_min / 10);
 222                 hp300_rtc_write(RTC_REG_MIN2, t->tm_min % 10);
 223                 hp300_rtc_write(RTC_REG_HOUR1,
 224                                 ((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE);
 225                 hp300_rtc_write(RTC_REG_HOUR2, t->tm_hour % 10);
 226                 hp300_rtc_write(RTC_REG_DAY1, t->tm_mday / 10);
 227                 hp300_rtc_write(RTC_REG_DAY2, t->tm_mday % 10);
 228                 hp300_rtc_write(RTC_REG_MON1, (t->tm_mon + 1) / 10);
 229                 hp300_rtc_write(RTC_REG_MON2, (t->tm_mon + 1) % 10);
 230                 if (t->tm_year >= 100)
 231                         t->tm_year -= 100;
 232                 hp300_rtc_write(RTC_REG_YEAR1, t->tm_year / 10);
 233                 hp300_rtc_write(RTC_REG_YEAR2, t->tm_year % 10);
 234         }
 235
 236         return 0;
 237 }
 238
 239 static unsigned int hp300_get_ss(void)
 240 {
 241         return hp300_rtc_read(RTC_REG_SEC1) * 10 +
 242                 hp300_rtc_read(RTC_REG_SEC2);
 243 }
 244
 245 static void __init hp300_init_IRQ(void)
 246 {
 247 }
 248
 249 void __init config_hp300(void)
 250 {
 251         mach_sched_init      = hp300_sched_init;
 252         mach_init_IRQ        = hp300_init_IRQ;
 253         mach_get_model       = hp300_get_model;
 254         arch_gettimeoffset   = hp300_gettimeoffset;
 255         mach_hwclk           = hp300_hwclk;
 256         mach_get_ss          = hp300_get_ss;
 257         mach_reset           = hp300_reset;
 258 #ifdef CONFIG_HEARTBEAT
 259         mach_heartbeat       = hp300_pulse;
 260 #endif
 261         mach_max_dma_address = 0xffffffff;
 262
 263         if (hp300_model >= HP_330 && hp300_model <= HP_433S && hp300_model != HP_350) {
 264                 printk(KERN_INFO "Detected HP9000 model %s\n", hp300_models[hp300_model-HP_320]);
 265                 strcat(hp300_model_name, hp300_models[hp300_model-HP_320]);
 266         }
 267         else {
 268                 panic("Unknown HP9000 Model");
 269         }
 270 #ifdef CONFIG_SERIAL_8250_CONSOLE
 271         hp300_setup_serial_console();
 272 #endif
 273 }