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 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 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 108 109 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 150 151 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 } 175 176 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 } 203 204 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 } 242 243 static void __init hp300_init_IRQ(void) 244 { 245 } 246 247 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