linux/arch/m68k/hp300/config.c
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   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#include <linux/rtc.h>
  16
  17#include <asm/bootinfo.h>
  18#include <asm/bootinfo-hp300.h>
  19#include <asm/byteorder.h>
  20#include <asm/machdep.h>
  21#include <asm/blinken.h>
  22#include <asm/io.h>                               /* readb() and writeb() */
  23#include <asm/hp300hw.h>
  24
  25#include "time.h"
  26
  27unsigned long hp300_model;
  28unsigned long hp300_uart_scode = -1;
  29unsigned char hp300_ledstate;
  30EXPORT_SYMBOL(hp300_ledstate);
  31
  32static char s_hp330[] __initdata = "330";
  33static char s_hp340[] __initdata = "340";
  34static char s_hp345[] __initdata = "345";
  35static char s_hp360[] __initdata = "360";
  36static char s_hp370[] __initdata = "370";
  37static char s_hp375[] __initdata = "375";
  38static char s_hp380[] __initdata = "380";
  39static char s_hp385[] __initdata = "385";
  40static char s_hp400[] __initdata = "400";
  41static char s_hp425t[] __initdata = "425t";
  42static char s_hp425s[] __initdata = "425s";
  43static char s_hp425e[] __initdata = "425e";
  44static char s_hp433t[] __initdata = "433t";
  45static char s_hp433s[] __initdata = "433s";
  46static char *hp300_models[] __initdata = {
  47        [HP_320]        = NULL,
  48        [HP_330]        = s_hp330,
  49        [HP_340]        = s_hp340,
  50        [HP_345]        = s_hp345,
  51        [HP_350]        = NULL,
  52        [HP_360]        = s_hp360,
  53        [HP_370]        = s_hp370,
  54        [HP_375]        = s_hp375,
  55        [HP_380]        = s_hp380,
  56        [HP_385]        = s_hp385,
  57        [HP_400]        = s_hp400,
  58        [HP_425T]       = s_hp425t,
  59        [HP_425S]       = s_hp425s,
  60        [HP_425E]       = s_hp425e,
  61        [HP_433T]       = s_hp433t,
  62        [HP_433S]       = s_hp433s,
  63};
  64
  65static char hp300_model_name[13] = "HP9000/";
  66
  67extern void hp300_reset(void);
  68#ifdef CONFIG_SERIAL_8250_CONSOLE
  69extern int hp300_setup_serial_console(void) __init;
  70#endif
  71
  72int __init hp300_parse_bootinfo(const struct bi_record *record)
  73{
  74        int unknown = 0;
  75        const void *data = record->data;
  76
  77        switch (be16_to_cpu(record->tag)) {
  78        case BI_HP300_MODEL:
  79                hp300_model = be32_to_cpup(data);
  80                break;
  81
  82        case BI_HP300_UART_SCODE:
  83                hp300_uart_scode = be32_to_cpup(data);
  84                break;
  85
  86        case BI_HP300_UART_ADDR:
  87                /* serial port address: ignored here */
  88                break;
  89
  90        default:
  91                unknown = 1;
  92        }
  93
  94        return unknown;
  95}
  96
  97#ifdef CONFIG_HEARTBEAT
  98static void hp300_pulse(int x)
  99{
 100        if (x)
 101                blinken_leds(0x10, 0);
 102        else
 103                blinken_leds(0, 0x10);
 104}
 105#endif
 106
 107static void hp300_get_model(char *model)
 108{
 109        strcpy(model, hp300_model_name);
 110}
 111
 112#define RTCBASE                 0xf0420000
 113#define RTC_DATA                0x1
 114#define RTC_CMD                 0x3
 115
 116#define RTC_BUSY                0x02
 117#define RTC_DATA_RDY            0x01
 118
 119#define rtc_busy()              (in_8(RTCBASE + RTC_CMD) & RTC_BUSY)
 120#define rtc_data_available()    (in_8(RTCBASE + RTC_CMD) & RTC_DATA_RDY)
 121#define rtc_status()            (in_8(RTCBASE + RTC_CMD))
 122#define rtc_command(x)          out_8(RTCBASE + RTC_CMD, (x))
 123#define rtc_read_data()         (in_8(RTCBASE + RTC_DATA))
 124#define rtc_write_data(x)       out_8(RTCBASE + RTC_DATA, (x))
 125
 126#define RTC_SETREG      0xe0
 127#define RTC_WRITEREG    0xc2
 128#define RTC_READREG     0xc3
 129
 130#define RTC_REG_SEC2    0
 131#define RTC_REG_SEC1    1
 132#define RTC_REG_MIN2    2
 133#define RTC_REG_MIN1    3
 134#define RTC_REG_HOUR2   4
 135#define RTC_REG_HOUR1   5
 136#define RTC_REG_WDAY    6
 137#define RTC_REG_DAY2    7
 138#define RTC_REG_DAY1    8
 139#define RTC_REG_MON2    9
 140#define RTC_REG_MON1    10
 141#define RTC_REG_YEAR2   11
 142#define RTC_REG_YEAR1   12
 143
 144#define RTC_HOUR1_24HMODE 0x8
 145
 146#define RTC_STAT_MASK   0xf0
 147#define RTC_STAT_RDY    0x40
 148
 149static inline unsigned char hp300_rtc_read(unsigned char reg)
 150{
 151        unsigned char s, ret;
 152        unsigned long flags;
 153
 154        local_irq_save(flags);
 155
 156        while (rtc_busy());
 157        rtc_command(RTC_SETREG);
 158        while (rtc_busy());
 159        rtc_write_data(reg);
 160        while (rtc_busy());
 161        rtc_command(RTC_READREG);
 162
 163        do {
 164                while (!rtc_data_available());
 165                s = rtc_status();
 166                ret = rtc_read_data();
 167        } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 168
 169        local_irq_restore(flags);
 170
 171        return ret;
 172}
 173
 174static inline unsigned char hp300_rtc_write(unsigned char reg,
 175                                            unsigned char val)
 176{
 177        unsigned char s, ret;
 178        unsigned long flags;
 179
 180        local_irq_save(flags);
 181
 182        while (rtc_busy());
 183        rtc_command(RTC_SETREG);
 184        while (rtc_busy());
 185        rtc_write_data((val << 4) | reg);
 186        while (rtc_busy());
 187        rtc_command(RTC_WRITEREG);
 188        while (rtc_busy());
 189        rtc_command(RTC_READREG);
 190
 191        do {
 192                while (!rtc_data_available());
 193                s = rtc_status();
 194                ret = rtc_read_data();
 195        } while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
 196
 197        local_irq_restore(flags);
 198
 199        return ret;
 200}
 201
 202static int hp300_hwclk(int op, struct rtc_time *t)
 203{
 204        if (!op) { /* read */
 205                t->tm_sec  = hp300_rtc_read(RTC_REG_SEC1) * 10 +
 206                        hp300_rtc_read(RTC_REG_SEC2);
 207                t->tm_min  = hp300_rtc_read(RTC_REG_MIN1) * 10 +
 208                        hp300_rtc_read(RTC_REG_MIN2);
 209                t->tm_hour = (hp300_rtc_read(RTC_REG_HOUR1) & 3) * 10 +
 210                        hp300_rtc_read(RTC_REG_HOUR2);
 211                t->tm_wday = -1;
 212                t->tm_mday = hp300_rtc_read(RTC_REG_DAY1) * 10 +
 213                        hp300_rtc_read(RTC_REG_DAY2);
 214                t->tm_mon  = hp300_rtc_read(RTC_REG_MON1) * 10 +
 215                        hp300_rtc_read(RTC_REG_MON2) - 1;
 216                t->tm_year = hp300_rtc_read(RTC_REG_YEAR1) * 10 +
 217                        hp300_rtc_read(RTC_REG_YEAR2);
 218                if (t->tm_year <= 69)
 219                        t->tm_year += 100;
 220        } else {
 221                hp300_rtc_write(RTC_REG_SEC1, t->tm_sec / 10);
 222                hp300_rtc_write(RTC_REG_SEC2, t->tm_sec % 10);
 223                hp300_rtc_write(RTC_REG_MIN1, t->tm_min / 10);
 224                hp300_rtc_write(RTC_REG_MIN2, t->tm_min % 10);
 225                hp300_rtc_write(RTC_REG_HOUR1,
 226                                ((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE);
 227                hp300_rtc_write(RTC_REG_HOUR2, t->tm_hour % 10);
 228                hp300_rtc_write(RTC_REG_DAY1, t->tm_mday / 10);
 229                hp300_rtc_write(RTC_REG_DAY2, t->tm_mday % 10);
 230                hp300_rtc_write(RTC_REG_MON1, (t->tm_mon + 1) / 10);
 231                hp300_rtc_write(RTC_REG_MON2, (t->tm_mon + 1) % 10);
 232                if (t->tm_year >= 100)
 233                        t->tm_year -= 100;
 234                hp300_rtc_write(RTC_REG_YEAR1, t->tm_year / 10);
 235                hp300_rtc_write(RTC_REG_YEAR2, t->tm_year % 10);
 236        }
 237
 238        return 0;
 239}
 240
 241static unsigned int hp300_get_ss(void)
 242{
 243        return hp300_rtc_read(RTC_REG_SEC1) * 10 +
 244                hp300_rtc_read(RTC_REG_SEC2);
 245}
 246
 247static void __init hp300_init_IRQ(void)
 248{
 249}
 250
 251void __init config_hp300(void)
 252{
 253        mach_sched_init      = hp300_sched_init;
 254        mach_init_IRQ        = hp300_init_IRQ;
 255        mach_get_model       = hp300_get_model;
 256        arch_gettimeoffset   = hp300_gettimeoffset;
 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}
 277