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/serial_8250.h>
14#include <linux/string.h>
15#include <linux/kernel.h>
16#include <linux/console.h>
17#include <linux/rtc.h>
18
19#include <asm/bootinfo.h>
20#include <asm/bootinfo-hp300.h>
21#include <asm/byteorder.h>
22#include <asm/machdep.h>
23#include <asm/blinken.h>
24#include <asm/io.h>                               /* readb() and writeb() */
25#include <asm/hp300hw.h>
26#include <asm/config.h>
27
28#include "time.h"
29
30unsigned long hp300_model;
31unsigned long hp300_uart_scode = -1;
32unsigned char hp300_ledstate;
33EXPORT_SYMBOL(hp300_ledstate);
34
35static char s_hp330[] __initdata = "330";
36static char s_hp340[] __initdata = "340";
37static char s_hp345[] __initdata = "345";
38static char s_hp360[] __initdata = "360";
39static char s_hp370[] __initdata = "370";
40static char s_hp375[] __initdata = "375";
41static char s_hp380[] __initdata = "380";
42static char s_hp385[] __initdata = "385";
43static char s_hp400[] __initdata = "400";
44static char s_hp425t[] __initdata = "425t";
45static char s_hp425s[] __initdata = "425s";
46static char s_hp425e[] __initdata = "425e";
47static char s_hp433t[] __initdata = "433t";
48static char s_hp433s[] __initdata = "433s";
49static char *hp300_models[] __initdata = {
50	[HP_320]	= NULL,
51	[HP_330]	= s_hp330,
52	[HP_340]	= s_hp340,
53	[HP_345]	= s_hp345,
54	[HP_350]	= NULL,
55	[HP_360]	= s_hp360,
56	[HP_370]	= s_hp370,
57	[HP_375]	= s_hp375,
58	[HP_380]	= s_hp380,
59	[HP_385]	= s_hp385,
60	[HP_400]	= s_hp400,
61	[HP_425T]	= s_hp425t,
62	[HP_425S]	= s_hp425s,
63	[HP_425E]	= s_hp425e,
64	[HP_433T]	= s_hp433t,
65	[HP_433S]	= s_hp433s,
66};
67
68static char hp300_model_name[13] = "HP9000/";
69
70extern void hp300_reset(void);
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 void __init hp300_init_IRQ(void)
242{
243}
244
245void __init config_hp300(void)
246{
247	mach_sched_init      = hp300_sched_init;
248	mach_init_IRQ        = hp300_init_IRQ;
249	mach_get_model       = hp300_get_model;
250	mach_hwclk	     = hp300_hwclk;
251	mach_reset           = hp300_reset;
252#ifdef CONFIG_HEARTBEAT
253	mach_heartbeat       = hp300_pulse;
254#endif
255
256	if (hp300_model >= HP_330 && hp300_model <= HP_433S &&
257	    hp300_model != HP_350) {
258		pr_info("Detected HP9000 model %s\n",
259			hp300_models[hp300_model-HP_320]);
260		strcat(hp300_model_name, hp300_models[hp300_model-HP_320]);
261	} else {
262		panic("Unknown HP9000 Model");
263	}
264	hp300_setup_serial_console();
265}
266