arch/m68k/hp300/config.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/m68k/hp300/config.c
   4  *
   5  *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
   6  *
   7  *  This file contains the HP300-specific initialisation code.  It gets
   8  *  called by setup.c.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/string.h>
  14 #include <linux/kernel.h>
  15 #include <linux/console.h>
  16 #include <linux/rtc.h>
  17
  18 #include <asm/bootinfo.h>
  19 #include <asm/bootinfo-hp300.h>
  20 #include <asm/byteorder.h>
  21 #include <asm/machdep.h>
  22 #include <asm/blinken.h>
  23 #include <asm/io.h>                               /* readb() and writeb() */
  24 #include <asm/hp300hw.h>
  25 #include <asm/config.h>
  26
  27 #include "time.h"
  28
  29 unsigned long hp300_model;
  30 unsigned long hp300_uart_scode = -1;
  31 unsigned char hp300_ledstate;
  32 EXPORT_SYMBOL(hp300_ledstate);
  33
  34 static char s_hp330[] __initdata = "330";
  35 static char s_hp340[] __initdata = "340";
  36 static char s_hp345[] __initdata = "345";
  37 static char s_hp360[] __initdata = "360";
  38 static char s_hp370[] __initdata = "370";
  39 static char s_hp375[] __initdata = "375";
  40 static char s_hp380[] __initdata = "380";
  41 static char s_hp385[] __initdata = "385";
  42 static char s_hp400[] __initdata = "400";
  43 static char s_hp425t[] __initdata = "425t";
  44 static char s_hp425s[] __initdata = "425s";
  45 static char s_hp425e[] __initdata = "425e";
  46 static char s_hp433t[] __initdata = "433t";
  47 static char s_hp433s[] __initdata = "433s";
  48 static char *hp300_models[] __initdata = {
  49         [HP_320]        = NULL,
  50         [HP_330]        = s_hp330,
  51         [HP_340]        = s_hp340,
  52         [HP_345]        = s_hp345,
  53         [HP_350]        = NULL,
  54         [HP_360]        = s_hp360,
  55         [HP_370]        = s_hp370,
  56         [HP_375]        = s_hp375,
  57         [HP_380]        = s_hp380,
  58         [HP_385]        = s_hp385,
  59         [HP_400]        = s_hp400,
  60         [HP_425T]       = s_hp425t,
  61         [HP_425S]       = s_hp425s,
  62         [HP_425E]       = s_hp425e,
  63         [HP_433T]       = s_hp433t,
  64         [HP_433S]       = s_hp433s,
  65 };
  66
  67 static char hp300_model_name[13] = "HP9000/";
  68
  69 extern void hp300_reset(void);
  70 #ifdef CONFIG_SERIAL_8250_CONSOLE
  71 extern int hp300_setup_serial_console(void) __init;
  72 #endif
  73
  74 int __init hp300_parse_bootinfo(const struct bi_record *record)
  75 {
  76         int unknown = 0;
  77         const void *data = record->data;
  78
  79         switch (be16_to_cpu(record->tag)) {
  80         case BI_HP300_MODEL:
  81                 hp300_model = be32_to_cpup(data);
  82                 break;
  83
  84         case BI_HP300_UART_SCODE:
  85                 hp300_uart_scode = be32_to_cpup(data);
  86                 break;
  87
  88         case BI_HP300_UART_ADDR:
  89                 /* serial port address: ignored here */
  90                 break;
  91
  92         default:
  93                 unknown = 1;
  94         }
  95
  96         return unknown;
  97 }
  98
  99 #ifdef CONFIG_HEARTBEAT
 100 static void hp300_pulse(int x)
 101 {
 102         if (x)
 103                 blinken_leds(0x10, 0);
 104         else
 105                 blinken_leds(0, 0x10);
 106 }
 107 #endif
 108
 109 static void hp300_get_model(char *model)
 110 {
 111         strcpy(model, hp300_model_name);
 112 }
 113
 114 #define RTCBASE                 0xf0420000
 115 #define RTC_DATA                0x1
 116 #define RTC_CMD                 0x3
 117
 118 #define RTC_BUSY                0x02
 119 #define RTC_DATA_RDY            0x01
 120
 121 #define rtc_busy()              (in_8(RTCBASE + RTC_CMD) & RTC_BUSY)
 122 #define rtc_data_available()    (in_8(RTCBASE + RTC_CMD) & RTC_DATA_RDY)
 123 #define rtc_status()            (in_8(RTCBASE + RTC_CMD))
 124 #define rtc_command(x)          out_8(RTCBASE + RTC_CMD, (x))
 125 #define rtc_read_data()         (in_8(RTCBASE + RTC_DATA))
 126 #define rtc_write_data(x)       out_8(RTCBASE + RTC_DATA, (x))
 127
 128 #define RTC_SETREG      0xe0
 129 #define RTC_WRITEREG    0xc2
 130 #define RTC_READREG     0xc3
 131
 132 #define RTC_REG_SEC2    0
 133 #define RTC_REG_SEC1    1
 134 #define RTC_REG_MIN2    2
 135 #define RTC_REG_MIN1    3
 136 #define RTC_REG_HOUR2   4
 137 #define RTC_REG_HOUR1   5
 138 #define RTC_REG_WDAY    6
 139 #define RTC_REG_DAY2    7
 140 #define RTC_REG_DAY1    8
 141 #define RTC_REG_MON2    9
 142 #define RTC_REG_MON1    10
 143 #define RTC_REG_YEAR2   11
 144 #define RTC_REG_YEAR1   12
 145
 146 #define RTC_HOUR1_24HMODE 0x8
 147
 148 #define RTC_STAT_MASK   0xf0
 149 #define RTC_STAT_RDY    0x40
 150
 151 static inline unsigned char hp300_rtc_read(unsigned char reg)
 152 {
 153         unsigned char s, ret;
 154         unsigned long flags;
 155
 156         local_irq_save(flags);
 157
 158         while (rtc_busy());
 159         rtc_command(RTC_SETREG);
 160         while (rtc_busy());
 161         rtc_write_data(reg);
 162         while (rtc_busy());
 163         rtc_command(RTC_READREG);
 164
 165         do {
 166                 while (!rtc_data_available());
 167                 s = rtc_status();
 168                 ret = rtc_read_data();
 169         } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 170
 171         local_irq_restore(flags);
 172
 173         return ret;
 174 }
 175
 176 static inline unsigned char hp300_rtc_write(unsigned char reg,
 177                                             unsigned char val)
 178 {
 179         unsigned char s, ret;
 180         unsigned long flags;
 181
 182         local_irq_save(flags);
 183
 184         while (rtc_busy());
 185         rtc_command(RTC_SETREG);
 186         while (rtc_busy());
 187         rtc_write_data((val << 4) | reg);
 188         while (rtc_busy());
 189         rtc_command(RTC_WRITEREG);
 190         while (rtc_busy());
 191         rtc_command(RTC_READREG);
 192
 193         do {
 194                 while (!rtc_data_available());
 195                 s = rtc_status();
 196                 ret = rtc_read_data();
 197         } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 198
 199         local_irq_restore(flags);
 200
 201         return ret;
 202 }
 203
 204 static int hp300_hwclk(int op, struct rtc_time *t)
 205 {
 206         if (!op) { /* read */
 207                 t->tm_sec  = hp300_rtc_read(RTC_REG_SEC1) * 10 +
 208                         hp300_rtc_read(RTC_REG_SEC2);
 209                 t->tm_min  = hp300_rtc_read(RTC_REG_MIN1) * 10 +
 210                         hp300_rtc_read(RTC_REG_MIN2);
 211                 t->tm_hour = (hp300_rtc_read(RTC_REG_HOUR1) & 3) * 10 +
 212                         hp300_rtc_read(RTC_REG_HOUR2);
 213                 t->tm_wday = -1;
 214                 t->tm_mday = hp300_rtc_read(RTC_REG_DAY1) * 10 +
 215                         hp300_rtc_read(RTC_REG_DAY2);
 216                 t->tm_mon  = hp300_rtc_read(RTC_REG_MON1) * 10 +
 217                         hp300_rtc_read(RTC_REG_MON2) - 1;
 218                 t->tm_year = hp300_rtc_read(RTC_REG_YEAR1) * 10 +
 219                         hp300_rtc_read(RTC_REG_YEAR2);
 220                 if (t->tm_year <= 69)
 221                         t->tm_year += 100;
 222         } else {
 223                 hp300_rtc_write(RTC_REG_SEC1, t->tm_sec / 10);
 224                 hp300_rtc_write(RTC_REG_SEC2, t->tm_sec % 10);
 225                 hp300_rtc_write(RTC_REG_MIN1, t->tm_min / 10);
 226                 hp300_rtc_write(RTC_REG_MIN2, t->tm_min % 10);
 227                 hp300_rtc_write(RTC_REG_HOUR1,
 228                                 ((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE);
 229                 hp300_rtc_write(RTC_REG_HOUR2, t->tm_hour % 10);
 230                 hp300_rtc_write(RTC_REG_DAY1, t->tm_mday / 10);
 231                 hp300_rtc_write(RTC_REG_DAY2, t->tm_mday % 10);
 232                 hp300_rtc_write(RTC_REG_MON1, (t->tm_mon + 1) / 10);
 233                 hp300_rtc_write(RTC_REG_MON2, (t->tm_mon + 1) % 10);
 234                 if (t->tm_year >= 100)
 235                         t->tm_year -= 100;
 236                 hp300_rtc_write(RTC_REG_YEAR1, t->tm_year / 10);
 237                 hp300_rtc_write(RTC_REG_YEAR2, t->tm_year % 10);
 238         }
 239
 240         return 0;
 241 }
 242
 243 static void __init hp300_init_IRQ(void)
 244 {
 245 }
 246
 247 void __init config_hp300(void)
 248 {
 249         mach_sched_init      = hp300_sched_init;
 250         mach_init_IRQ        = hp300_init_IRQ;
 251         mach_get_model       = hp300_get_model;
 252         mach_hwclk           = hp300_hwclk;
 253         mach_reset           = hp300_reset;
 254 #ifdef CONFIG_HEARTBEAT
 255         mach_heartbeat       = hp300_pulse;
 256 #endif
 257
 258         if (hp300_model >= HP_330 && hp300_model <= HP_433S &&
 259             hp300_model != HP_350) {
 260                 pr_info("Detected HP9000 model %s\n",
 261                         hp300_models[hp300_model-HP_320]);
 262                 strcat(hp300_model_name, hp300_models[hp300_model-HP_320]);
 263         } else {
 264                 panic("Unknown HP9000 Model");
 265         }
 266 #ifdef CONFIG_SERIAL_8250_CONSOLE
 267         hp300_setup_serial_console();
 268 #endif
 269 }