xref: /openbmc/linux/arch/m68k/hp300/config.c (revision 348cce32)
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 
29 unsigned long hp300_model;
30 unsigned long hp300_uart_scode = -1;
31 unsigned char hp300_ledstate;
32 EXPORT_SYMBOL(hp300_ledstate);
33 
34 static char s_hp330[] __initdata = "330";
35 static char s_hp340[] __initdata = "340";
36 static char s_hp345[] __initdata = "345";
37 static char s_hp360[] __initdata = "360";
38 static char s_hp370[] __initdata = "370";
39 static char s_hp375[] __initdata = "375";
40 static char s_hp380[] __initdata = "380";
41 static char s_hp385[] __initdata = "385";
42 static char s_hp400[] __initdata = "400";
43 static char s_hp425t[] __initdata = "425t";
44 static char s_hp425s[] __initdata = "425s";
45 static char s_hp425e[] __initdata = "425e";
46 static char s_hp433t[] __initdata = "433t";
47 static char s_hp433s[] __initdata = "433s";
48 static 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 
67 static char hp300_model_name[13] = "HP9000/";
68 
69 extern void hp300_reset(void);
70 #ifdef CONFIG_SERIAL_8250_CONSOLE
71 extern int hp300_setup_serial_console(void) __init;
72 #endif
73 
hp300_parse_bootinfo(const struct bi_record * record)74 int __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
hp300_pulse(int x)100 static 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 
hp300_get_model(char * model)109 static 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 
hp300_rtc_read(unsigned char reg)151 static 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 
hp300_rtc_write(unsigned char reg,unsigned char val)176 static 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 
hp300_hwclk(int op,struct rtc_time * t)204 static 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 
hp300_init_IRQ(void)243 static void __init hp300_init_IRQ(void)
244 {
245 }
246 
config_hp300(void)247 void __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