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 | |
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(p: data); |
80 | break; |
81 | |
82 | case BI_HP300_UART_SCODE: |
83 | hp300_uart_scode = be32_to_cpup(p: 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 |
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 | |
107 | static void hp300_get_model(char *model) |
108 | { |
109 | strcpy(p: model, q: 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 | |
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 | |
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 | |
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, val: t->tm_sec / 10); |
222 | hp300_rtc_write(RTC_REG_SEC2, val: t->tm_sec % 10); |
223 | hp300_rtc_write(RTC_REG_MIN1, val: t->tm_min / 10); |
224 | hp300_rtc_write(RTC_REG_MIN2, val: t->tm_min % 10); |
225 | hp300_rtc_write(RTC_REG_HOUR1, |
226 | val: ((t->tm_hour / 10) & 3) | RTC_HOUR1_24HMODE); |
227 | hp300_rtc_write(RTC_REG_HOUR2, val: t->tm_hour % 10); |
228 | hp300_rtc_write(RTC_REG_DAY1, val: t->tm_mday / 10); |
229 | hp300_rtc_write(RTC_REG_DAY2, val: t->tm_mday % 10); |
230 | hp300_rtc_write(RTC_REG_MON1, val: (t->tm_mon + 1) / 10); |
231 | hp300_rtc_write(RTC_REG_MON2, val: (t->tm_mon + 1) % 10); |
232 | if (t->tm_year >= 100) |
233 | t->tm_year -= 100; |
234 | hp300_rtc_write(RTC_REG_YEAR1, val: t->tm_year / 10); |
235 | hp300_rtc_write(RTC_REG_YEAR2, val: t->tm_year % 10); |
236 | } |
237 | |
238 | return 0; |
239 | } |
240 | |
241 | static void __init hp300_init_IRQ(void) |
242 | { |
243 | } |
244 | |
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(fmt: "Unknown HP9000 Model" ); |
263 | } |
264 | hp300_setup_serial_console(); |
265 | } |
266 | |