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
  26 #include "time.h"
  27
  28 unsigned long hp300_model;
  29 unsigned long hp300_uart_scode = -1;
  30 unsigned char hp300_ledstate;
  31 EXPORT_SYMBOL(hp300_ledstate);
  32
  33 static char s_hp330[] __initdata = "330";
  34 static char s_hp340[] __initdata = "340";
  35 static char s_hp345[] __initdata = "345";
  36 static char s_hp360[] __initdata = "360";
  37 static char s_hp370[] __initdata = "370";
  38 static char s_hp375[] __initdata = "375";
  39 static char s_hp380[] __initdata = "380";
  40 static char s_hp385[] __initdata = "385";
  41 static char s_hp400[] __initdata = "400";
  42 static char s_hp425t[] __initdata = "425t";
  43 static char s_hp425s[] __initdata = "425s";
  44 static char s_hp425e[] __initdata = "425e";
  45 static char s_hp433t[] __initdata = "433t";
  46 static char s_hp433s[] __initdata = "433s";
  47 static char *hp300_models[] __initdata = {
  48         [HP_320]        = NULL,
  49         [HP_330]        = s_hp330,
  50         [HP_340]        = s_hp340,
  51         [HP_345]        = s_hp345,
  52         [HP_350]        = NULL,
  53         [HP_360]        = s_hp360,
  54         [HP_370]        = s_hp370,
  55         [HP_375]        = s_hp375,
  56         [HP_380]        = s_hp380,
  57         [HP_385]        = s_hp385,
  58         [HP_400]        = s_hp400,
  59         [HP_425T]       = s_hp425t,
  60         [HP_425S]       = s_hp425s,
  61         [HP_425E]       = s_hp425e,
  62         [HP_433T]       = s_hp433t,
  63         [HP_433S]       = s_hp433s,
  64 };
  65
  66 static char hp300_model_name[13] = "HP9000/";
  67
  68 extern void hp300_reset(void);
  69 #ifdef CONFIG_SERIAL_8250_CONSOLE
  70 extern int hp300_setup_serial_console(void) __init;
  71 #endif
  72
  73 int __init hp300_parse_bootinfo(const struct bi_record *record)
  74 {
  75         int unknown = 0;
  76         const void *data = record->data;
  77
  78         switch (be16_to_cpu(record->tag)) {
  79         case BI_HP300_MODEL:
  80                 hp300_model = be32_to_cpup(data);
  81                 break;
  82
  83         case BI_HP300_UART_SCODE:
  84                 hp300_uart_scode = be32_to_cpup(data);
  85                 break;
  86
  87         case BI_HP300_UART_ADDR:
  88                 /* serial port address: ignored here */
  89                 break;
  90
  91         default:
  92                 unknown = 1;
  93         }
  94
  95         return unknown;
  96 }
  97
  98 #ifdef CONFIG_HEARTBEAT
  99 static void hp300_pulse(int x)
 100 {
 101         if (x)
 102                 blinken_leds(0x10, 0);
 103         else
 104                 blinken_leds(0, 0x10);
 105 }
 106 #endif
 107
 108 static void hp300_get_model(char *model)
 109 {
 110         strcpy(model, hp300_model_name);
 111 }
 112
 113 #define RTCBASE                 0xf0420000
 114 #define RTC_DATA                0x1
 115 #define RTC_CMD                 0x3
 116
 117 #define RTC_BUSY                0x02
 118 #define RTC_DATA_RDY            0x01
 119
 120 #define rtc_busy()              (in_8(RTCBASE + RTC_CMD) & RTC_BUSY)
 121 #define rtc_data_available()    (in_8(RTCBASE + RTC_CMD) & RTC_DATA_RDY)
 122 #define rtc_status()            (in_8(RTCBASE + RTC_CMD))
 123 #define rtc_command(x)          out_8(RTCBASE + RTC_CMD, (x))
 124 #define rtc_read_data()         (in_8(RTCBASE + RTC_DATA))
 125 #define rtc_write_data(x)       out_8(RTCBASE + RTC_DATA, (x))
 126
 127 #define RTC_SETREG      0xe0
 128 #define RTC_WRITEREG    0xc2
 129 #define RTC_READREG     0xc3
 130
 131 #define RTC_REG_SEC2    0
 132 #define RTC_REG_SEC1    1
 133 #define RTC_REG_MIN2    2
 134 #define RTC_REG_MIN1    3
 135 #define RTC_REG_HOUR2   4
 136 #define RTC_REG_HOUR1   5
 137 #define RTC_REG_WDAY    6
 138 #define RTC_REG_DAY2    7
 139 #define RTC_REG_DAY1    8
 140 #define RTC_REG_MON2    9
 141 #define RTC_REG_MON1    10
 142 #define RTC_REG_YEAR2   11
 143 #define RTC_REG_YEAR1   12
 144
 145 #define RTC_HOUR1_24HMODE 0x8
 146
 147 #define RTC_STAT_MASK   0xf0
 148 #define RTC_STAT_RDY    0x40
 149
 150 static inline unsigned char hp300_rtc_read(unsigned char reg)
 151 {
 152         unsigned char s, ret;
 153         unsigned long flags;
 154
 155         local_irq_save(flags);
 156
 157         while (rtc_busy());
 158         rtc_command(RTC_SETREG);
 159         while (rtc_busy());
 160         rtc_write_data(reg);
 161         while (rtc_busy());
 162         rtc_command(RTC_READREG);
 163
 164         do {
 165                 while (!rtc_data_available());
 166                 s = rtc_status();
 167                 ret = rtc_read_data();
 168         } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 169
 170         local_irq_restore(flags);
 171
 172         return ret;
 173 }
 174
 175 static inline unsigned char hp300_rtc_write(unsigned char reg,
 176                                             unsigned char val)
 177 {
 178         unsigned char s, ret;
 179         unsigned long flags;
 180
 181         local_irq_save(flags);
 182
 183         while (rtc_busy());
 184         rtc_command(RTC_SETREG);
 185         while (rtc_busy());
 186         rtc_write_data((val << 4) | reg);
 187         while (rtc_busy());
 188         rtc_command(RTC_WRITEREG);
 189         while (rtc_busy());
 190         rtc_command(RTC_READREG);
 191
 192         do {
 193                 while (!rtc_data_available());
 194                 s = rtc_status();
 195                 ret = rtc_read_data();
 196         } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 197
 198         local_irq_restore(flags);
 199
 200         return ret;
 201 }
 202
 203 static int hp300_hwclk(int op, struct rtc_time *t)
 204 {
 205         if (!op) { /* read */
 206                 t->tm_sec  = hp300_rtc_read(RTC_REG_SEC1) * 10 +
 207                         hp300_rtc_read(RTC_REG_SEC2);
 208                 t->tm_min  = hp300_rtc_read(RTC_REG_MIN1) * 10 +
 209                         hp300_rtc_read(RTC_REG_MIN2);
 210                 t->tm_hour = (hp300_rtc_read(RTC_REG_HOUR1) & 3) * 10 +
 211                         hp300_rtc_read(RTC_REG_HOUR2);
 212                 t->tm_wday = -1;
 213                 t->tm_mday = hp300_rtc_read(RTC_REG_DAY1) * 10 +
 214                         hp300_rtc_read(RTC_REG_DAY2);
 215                 t->tm_mon  = hp300_rtc_read(RTC_REG_MON1) * 10 +
 216                         hp300_rtc_read(RTC_REG_MON2) - 1;
 217                 t->tm_year = hp300_rtc_read(RTC_REG_YEAR1) * 10 +
 218                         hp300_rtc_read(RTC_REG_YEAR2);
 219                 if (t->tm_year <= 69)
 220                         t->tm_year += 100;
 221         } else {
 222                 hp300_rtc_write(RTC_REG_SEC1, t->tm_sec / 10);
 223                 hp300_rtc_write(RTC_REG_SEC2, t->tm_sec % 10);
 224                 hp300_rtc_write(RTC_REG_MIN1, t->tm_min / 10);
 225                 hp300_rtc_write(RTC_REG_MIN2, t->tm_min % 10);
 226                 hp300_rtc_write(RTC_REG_HOUR1,
 227                                 ((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE);
 228                 hp300_rtc_write(RTC_REG_HOUR2, t->tm_hour % 10);
 229                 hp300_rtc_write(RTC_REG_DAY1, t->tm_mday / 10);
 230                 hp300_rtc_write(RTC_REG_DAY2, t->tm_mday % 10);
 231                 hp300_rtc_write(RTC_REG_MON1, (t->tm_mon + 1) / 10);
 232                 hp300_rtc_write(RTC_REG_MON2, (t->tm_mon + 1) % 10);
 233                 if (t->tm_year >= 100)
 234                         t->tm_year -= 100;
 235                 hp300_rtc_write(RTC_REG_YEAR1, t->tm_year / 10);
 236                 hp300_rtc_write(RTC_REG_YEAR2, t->tm_year % 10);
 237         }
 238
 239         return 0;
 240 }
 241
 242 static unsigned int hp300_get_ss(void)
 243 {
 244         return hp300_rtc_read(RTC_REG_SEC1) * 10 +
 245                 hp300_rtc_read(RTC_REG_SEC2);
 246 }
 247
 248 static void __init hp300_init_IRQ(void)
 249 {
 250 }
 251
 252 void __init config_hp300(void)
 253 {
 254         mach_sched_init      = hp300_sched_init;
 255         mach_init_IRQ        = hp300_init_IRQ;
 256         mach_get_model       = hp300_get_model;
 257         mach_hwclk           = hp300_hwclk;
 258         mach_get_ss          = hp300_get_ss;
 259         mach_reset           = hp300_reset;
 260 #ifdef CONFIG_HEARTBEAT
 261         mach_heartbeat       = hp300_pulse;
 262 #endif
 263         mach_max_dma_address = 0xffffffff;
 264
 265         if (hp300_model >= HP_330 && hp300_model <= HP_433S &&
 266             hp300_model != HP_350) {
 267                 pr_info("Detected HP9000 model %s\n",
 268                         hp300_models[hp300_model-HP_320]);
 269                 strcat(hp300_model_name, hp300_models[hp300_model-HP_320]);
 270         } else {
 271                 panic("Unknown HP9000 Model");
 272         }
 273 #ifdef CONFIG_SERIAL_8250_CONSOLE
 274         hp300_setup_serial_console();
 275 #endif
 276 }