xref: /kernel/linux/linux-6.6/arch/m68k/hp300/config.c (revision 62306a36) 
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
29unsigned long hp300_model;
30unsigned long hp300_uart_scode = -1;
31unsigned char hp300_ledstate;
32EXPORT_SYMBOL(hp300_ledstate);
33
34static char s_hp330[] __initdata = "330";
35static char s_hp340[] __initdata = "340";
36static char s_hp345[] __initdata = "345";
37static char s_hp360[] __initdata = "360";
38static char s_hp370[] __initdata = "370";
39static char s_hp375[] __initdata = "375";
40static char s_hp380[] __initdata = "380";
41static char s_hp385[] __initdata = "385";
42static char s_hp400[] __initdata = "400";
43static char s_hp425t[] __initdata = "425t";
44static char s_hp425s[] __initdata = "425s";
45static char s_hp425e[] __initdata = "425e";
46static char s_hp433t[] __initdata = "433t";
47static char s_hp433s[] __initdata = "433s";
48static 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
67static char hp300_model_name[13] = "HP9000/";
68
69extern void hp300_reset(void);
70#ifdef CONFIG_SERIAL_8250_CONSOLE
71extern int hp300_setup_serial_console(void) __init;
72#endif
73
74int __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
100static 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
109static 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
151static 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
176static 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
204static 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
243static void __init hp300_init_IRQ(void)
244{
245}
246
247void __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}
270