xref: /kernel/linux/linux-5.10/arch/m68k/hp300/config.c (revision 8c2ecf20) 
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
28unsigned long hp300_model;
29unsigned long hp300_uart_scode = -1;
30unsigned char hp300_ledstate;
31EXPORT_SYMBOL(hp300_ledstate);
32
33static char s_hp330[] __initdata = "330";
34static char s_hp340[] __initdata = "340";
35static char s_hp345[] __initdata = "345";
36static char s_hp360[] __initdata = "360";
37static char s_hp370[] __initdata = "370";
38static char s_hp375[] __initdata = "375";
39static char s_hp380[] __initdata = "380";
40static char s_hp385[] __initdata = "385";
41static char s_hp400[] __initdata = "400";
42static char s_hp425t[] __initdata = "425t";
43static char s_hp425s[] __initdata = "425s";
44static char s_hp425e[] __initdata = "425e";
45static char s_hp433t[] __initdata = "433t";
46static char s_hp433s[] __initdata = "433s";
47static 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
66static char hp300_model_name[13] = "HP9000/";
67
68extern void hp300_reset(void);
69#ifdef CONFIG_SERIAL_8250_CONSOLE
70extern int hp300_setup_serial_console(void) __init;
71#endif
72
73int __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
99static 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
108static 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
150static 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
175static 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
203static 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
242static 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
248static void __init hp300_init_IRQ(void)
249{
250}
251
252void __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}
277