xref: /linux/arch/m68k/hp300/config.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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 
30 unsigned long hp300_model;
31 unsigned long hp300_uart_scode = -1;
32 unsigned char hp300_ledstate;
33 EXPORT_SYMBOL(hp300_ledstate);
34 
35 static char s_hp330[] __initdata = "330";
36 static char s_hp340[] __initdata = "340";
37 static char s_hp345[] __initdata = "345";
38 static char s_hp360[] __initdata = "360";
39 static char s_hp370[] __initdata = "370";
40 static char s_hp375[] __initdata = "375";
41 static char s_hp380[] __initdata = "380";
42 static char s_hp385[] __initdata = "385";
43 static char s_hp400[] __initdata = "400";
44 static char s_hp425t[] __initdata = "425t";
45 static char s_hp425s[] __initdata = "425s";
46 static char s_hp425e[] __initdata = "425e";
47 static char s_hp433t[] __initdata = "433t";
48 static char s_hp433s[] __initdata = "433s";
49 static 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 
68 static char hp300_model_name[13] = "HP9000/";
69 
70 extern void hp300_reset(void);
71 
hp300_parse_bootinfo(const struct bi_record * record)72 int __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
hp300_pulse(int x)98 static 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 
hp300_get_model(char * model)107 static 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 
hp300_rtc_read(unsigned char reg)149 static 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 
hp300_rtc_write(unsigned char reg,unsigned char val)174 static 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 
hp300_hwclk(int op,struct rtc_time * t)202 static 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 
hp300_init_IRQ(void)241 static void __init hp300_init_IRQ(void)
242 {
243 }
244 
config_hp300(void)245 void __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