277 lines
6.6 KiB
C
277 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/m68k/hp300/config.c
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*
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* Copyright (C) 1998 Philip Blundell <philb@gnu.org>
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*
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* This file contains the HP300-specific initialisation code. It gets
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* called by setup.c.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/console.h>
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#include <linux/rtc.h>
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#include <asm/bootinfo.h>
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#include <asm/bootinfo-hp300.h>
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#include <asm/byteorder.h>
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#include <asm/machdep.h>
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#include <asm/blinken.h>
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#include <asm/io.h> /* readb() and writeb() */
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#include <asm/hp300hw.h>
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#include "time.h"
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unsigned long hp300_model;
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unsigned long hp300_uart_scode = -1;
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unsigned char hp300_ledstate;
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EXPORT_SYMBOL(hp300_ledstate);
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static char s_hp330[] __initdata = "330";
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static char s_hp340[] __initdata = "340";
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static char s_hp345[] __initdata = "345";
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static char s_hp360[] __initdata = "360";
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static char s_hp370[] __initdata = "370";
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static char s_hp375[] __initdata = "375";
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static char s_hp380[] __initdata = "380";
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static char s_hp385[] __initdata = "385";
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static char s_hp400[] __initdata = "400";
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static char s_hp425t[] __initdata = "425t";
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static char s_hp425s[] __initdata = "425s";
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static char s_hp425e[] __initdata = "425e";
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static char s_hp433t[] __initdata = "433t";
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static char s_hp433s[] __initdata = "433s";
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static char *hp300_models[] __initdata = {
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[HP_320] = NULL,
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[HP_330] = s_hp330,
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[HP_340] = s_hp340,
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[HP_345] = s_hp345,
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[HP_350] = NULL,
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[HP_360] = s_hp360,
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[HP_370] = s_hp370,
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[HP_375] = s_hp375,
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[HP_380] = s_hp380,
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[HP_385] = s_hp385,
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[HP_400] = s_hp400,
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[HP_425T] = s_hp425t,
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[HP_425S] = s_hp425s,
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[HP_425E] = s_hp425e,
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[HP_433T] = s_hp433t,
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[HP_433S] = s_hp433s,
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};
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static char hp300_model_name[13] = "HP9000/";
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extern void hp300_reset(void);
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#ifdef CONFIG_SERIAL_8250_CONSOLE
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extern int hp300_setup_serial_console(void) __init;
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#endif
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int __init hp300_parse_bootinfo(const struct bi_record *record)
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{
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int unknown = 0;
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const void *data = record->data;
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switch (be16_to_cpu(record->tag)) {
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case BI_HP300_MODEL:
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hp300_model = be32_to_cpup(data);
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break;
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case BI_HP300_UART_SCODE:
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hp300_uart_scode = be32_to_cpup(data);
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break;
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case BI_HP300_UART_ADDR:
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/* serial port address: ignored here */
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break;
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default:
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unknown = 1;
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}
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return unknown;
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}
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#ifdef CONFIG_HEARTBEAT
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static void hp300_pulse(int x)
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{
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if (x)
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blinken_leds(0x10, 0);
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else
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blinken_leds(0, 0x10);
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}
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#endif
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static void hp300_get_model(char *model)
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{
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strcpy(model, hp300_model_name);
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}
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#define RTCBASE 0xf0420000
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#define RTC_DATA 0x1
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#define RTC_CMD 0x3
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#define RTC_BUSY 0x02
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#define RTC_DATA_RDY 0x01
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#define rtc_busy() (in_8(RTCBASE + RTC_CMD) & RTC_BUSY)
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#define rtc_data_available() (in_8(RTCBASE + RTC_CMD) & RTC_DATA_RDY)
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#define rtc_status() (in_8(RTCBASE + RTC_CMD))
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#define rtc_command(x) out_8(RTCBASE + RTC_CMD, (x))
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#define rtc_read_data() (in_8(RTCBASE + RTC_DATA))
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#define rtc_write_data(x) out_8(RTCBASE + RTC_DATA, (x))
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#define RTC_SETREG 0xe0
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#define RTC_WRITEREG 0xc2
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#define RTC_READREG 0xc3
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#define RTC_REG_SEC2 0
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#define RTC_REG_SEC1 1
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#define RTC_REG_MIN2 2
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#define RTC_REG_MIN1 3
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#define RTC_REG_HOUR2 4
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#define RTC_REG_HOUR1 5
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#define RTC_REG_WDAY 6
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#define RTC_REG_DAY2 7
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#define RTC_REG_DAY1 8
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#define RTC_REG_MON2 9
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#define RTC_REG_MON1 10
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#define RTC_REG_YEAR2 11
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#define RTC_REG_YEAR1 12
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#define RTC_HOUR1_24HMODE 0x8
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#define RTC_STAT_MASK 0xf0
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#define RTC_STAT_RDY 0x40
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static inline unsigned char hp300_rtc_read(unsigned char reg)
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{
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unsigned char s, ret;
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unsigned long flags;
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local_irq_save(flags);
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while (rtc_busy());
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rtc_command(RTC_SETREG);
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while (rtc_busy());
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rtc_write_data(reg);
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while (rtc_busy());
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rtc_command(RTC_READREG);
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do {
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while (!rtc_data_available());
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s = rtc_status();
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ret = rtc_read_data();
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} while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
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local_irq_restore(flags);
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return ret;
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}
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static inline unsigned char hp300_rtc_write(unsigned char reg,
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unsigned char val)
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{
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unsigned char s, ret;
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unsigned long flags;
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local_irq_save(flags);
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while (rtc_busy());
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rtc_command(RTC_SETREG);
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while (rtc_busy());
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rtc_write_data((val << 4) | reg);
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while (rtc_busy());
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rtc_command(RTC_WRITEREG);
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while (rtc_busy());
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rtc_command(RTC_READREG);
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do {
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while (!rtc_data_available());
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s = rtc_status();
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ret = rtc_read_data();
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} while ((s & RTC_STAT_MASK) != RTC_STAT_RDY);
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local_irq_restore(flags);
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return ret;
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}
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static int hp300_hwclk(int op, struct rtc_time *t)
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{
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if (!op) { /* read */
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t->tm_sec = hp300_rtc_read(RTC_REG_SEC1) * 10 +
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hp300_rtc_read(RTC_REG_SEC2);
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t->tm_min = hp300_rtc_read(RTC_REG_MIN1) * 10 +
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hp300_rtc_read(RTC_REG_MIN2);
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t->tm_hour = (hp300_rtc_read(RTC_REG_HOUR1) & 3) * 10 +
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hp300_rtc_read(RTC_REG_HOUR2);
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t->tm_wday = -1;
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t->tm_mday = hp300_rtc_read(RTC_REG_DAY1) * 10 +
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hp300_rtc_read(RTC_REG_DAY2);
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t->tm_mon = hp300_rtc_read(RTC_REG_MON1) * 10 +
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hp300_rtc_read(RTC_REG_MON2) - 1;
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t->tm_year = hp300_rtc_read(RTC_REG_YEAR1) * 10 +
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hp300_rtc_read(RTC_REG_YEAR2);
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if (t->tm_year <= 69)
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t->tm_year += 100;
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} else {
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hp300_rtc_write(RTC_REG_SEC1, t->tm_sec / 10);
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hp300_rtc_write(RTC_REG_SEC2, t->tm_sec % 10);
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hp300_rtc_write(RTC_REG_MIN1, t->tm_min / 10);
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hp300_rtc_write(RTC_REG_MIN2, t->tm_min % 10);
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hp300_rtc_write(RTC_REG_HOUR1,
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((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE);
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hp300_rtc_write(RTC_REG_HOUR2, t->tm_hour % 10);
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hp300_rtc_write(RTC_REG_DAY1, t->tm_mday / 10);
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hp300_rtc_write(RTC_REG_DAY2, t->tm_mday % 10);
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hp300_rtc_write(RTC_REG_MON1, (t->tm_mon + 1) / 10);
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hp300_rtc_write(RTC_REG_MON2, (t->tm_mon + 1) % 10);
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if (t->tm_year >= 100)
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t->tm_year -= 100;
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hp300_rtc_write(RTC_REG_YEAR1, t->tm_year / 10);
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hp300_rtc_write(RTC_REG_YEAR2, t->tm_year % 10);
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}
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return 0;
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}
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static unsigned int hp300_get_ss(void)
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{
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return hp300_rtc_read(RTC_REG_SEC1) * 10 +
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hp300_rtc_read(RTC_REG_SEC2);
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}
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static void __init hp300_init_IRQ(void)
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{
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}
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void __init config_hp300(void)
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{
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mach_sched_init = hp300_sched_init;
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mach_init_IRQ = hp300_init_IRQ;
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mach_get_model = hp300_get_model;
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mach_hwclk = hp300_hwclk;
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mach_get_ss = hp300_get_ss;
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mach_reset = hp300_reset;
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#ifdef CONFIG_HEARTBEAT
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mach_heartbeat = hp300_pulse;
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#endif
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mach_max_dma_address = 0xffffffff;
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if (hp300_model >= HP_330 && hp300_model <= HP_433S &&
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hp300_model != HP_350) {
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pr_info("Detected HP9000 model %s\n",
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hp300_models[hp300_model-HP_320]);
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strcat(hp300_model_name, hp300_models[hp300_model-HP_320]);
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} else {
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panic("Unknown HP9000 Model");
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}
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#ifdef CONFIG_SERIAL_8250_CONSOLE
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hp300_setup_serial_console();
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#endif
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}
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