1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/init.h> 3 #include <linux/types.h> 4 #include <linux/kernel.h> 5 #include <linux/mm.h> 6 #include <linux/tty.h> 7 #include <linux/console.h> 8 #include <linux/rtc.h> 9 #include <linux/vt_kern.h> 10 #include <linux/interrupt.h> 11 12 #include <asm/setup.h> 13 #include <asm/bootinfo.h> 14 #include <asm/bootinfo-apollo.h> 15 #include <asm/byteorder.h> 16 #include <asm/apollohw.h> 17 #include <asm/irq.h> 18 #include <asm/machdep.h> 19 #include <asm/config.h> 20 21 u_long sio01_physaddr; 22 u_long sio23_physaddr; 23 u_long rtc_physaddr; 24 u_long pica_physaddr; 25 u_long picb_physaddr; 26 u_long cpuctrl_physaddr; 27 u_long timer_physaddr; 28 u_long apollo_model; 29 30 extern void dn_sched_init(void); 31 extern void dn_init_IRQ(void); 32 extern int dn_dummy_hwclk(int, struct rtc_time *); 33 extern void dn_dummy_reset(void); 34 #ifdef CONFIG_HEARTBEAT 35 static void dn_heartbeat(int on); 36 #endif 37 static irqreturn_t dn_timer_int(int irq,void *); 38 static void dn_get_model(char *model); 39 static const char *apollo_models[] = { 40 [APOLLO_DN3000-APOLLO_DN3000] = "DN3000 (Otter)", 41 [APOLLO_DN3010-APOLLO_DN3000] = "DN3010 (Otter)", 42 [APOLLO_DN3500-APOLLO_DN3000] = "DN3500 (Cougar II)", 43 [APOLLO_DN4000-APOLLO_DN3000] = "DN4000 (Mink)", 44 [APOLLO_DN4500-APOLLO_DN3000] = "DN4500 (Roadrunner)" 45 }; 46 47 int __init apollo_parse_bootinfo(const struct bi_record *record) 48 { 49 int unknown = 0; 50 const void *data = record->data; 51 52 switch (be16_to_cpu(record->tag)) { 53 case BI_APOLLO_MODEL: 54 apollo_model = be32_to_cpup(data); 55 break; 56 57 default: 58 unknown=1; 59 } 60 61 return unknown; 62 } 63 64 static void __init dn_setup_model(void) 65 { 66 pr_info("Apollo hardware found: [%s]\n", 67 apollo_models[apollo_model - APOLLO_DN3000]); 68 69 switch(apollo_model) { 70 case APOLLO_UNKNOWN: 71 panic("Unknown apollo model"); 72 break; 73 case APOLLO_DN3000: 74 case APOLLO_DN3010: 75 sio01_physaddr=SAU8_SIO01_PHYSADDR; 76 rtc_physaddr=SAU8_RTC_PHYSADDR; 77 pica_physaddr=SAU8_PICA; 78 picb_physaddr=SAU8_PICB; 79 cpuctrl_physaddr=SAU8_CPUCTRL; 80 timer_physaddr=SAU8_TIMER; 81 break; 82 case APOLLO_DN4000: 83 sio01_physaddr=SAU7_SIO01_PHYSADDR; 84 sio23_physaddr=SAU7_SIO23_PHYSADDR; 85 rtc_physaddr=SAU7_RTC_PHYSADDR; 86 pica_physaddr=SAU7_PICA; 87 picb_physaddr=SAU7_PICB; 88 cpuctrl_physaddr=SAU7_CPUCTRL; 89 timer_physaddr=SAU7_TIMER; 90 break; 91 case APOLLO_DN4500: 92 panic("Apollo model not yet supported"); 93 break; 94 case APOLLO_DN3500: 95 sio01_physaddr=SAU7_SIO01_PHYSADDR; 96 sio23_physaddr=SAU7_SIO23_PHYSADDR; 97 rtc_physaddr=SAU7_RTC_PHYSADDR; 98 pica_physaddr=SAU7_PICA; 99 picb_physaddr=SAU7_PICB; 100 cpuctrl_physaddr=SAU7_CPUCTRL; 101 timer_physaddr=SAU7_TIMER; 102 break; 103 default: 104 panic("Undefined apollo model"); 105 break; 106 } 107 108 109 } 110 111 int dn_serial_console_wait_key(struct console *co) { 112 113 while(!(sio01.srb_csrb & 1)) 114 barrier(); 115 return sio01.rhrb_thrb; 116 } 117 118 void dn_serial_console_write (struct console *co, const char *str,unsigned int count) 119 { 120 while(count--) { 121 if (*str == '\n') { 122 sio01.rhrb_thrb = (unsigned char)'\r'; 123 while (!(sio01.srb_csrb & 0x4)) 124 ; 125 } 126 sio01.rhrb_thrb = (unsigned char)*str++; 127 while (!(sio01.srb_csrb & 0x4)) 128 ; 129 } 130 } 131 132 void dn_serial_print (const char *str) 133 { 134 while (*str) { 135 if (*str == '\n') { 136 sio01.rhrb_thrb = (unsigned char)'\r'; 137 while (!(sio01.srb_csrb & 0x4)) 138 ; 139 } 140 sio01.rhrb_thrb = (unsigned char)*str++; 141 while (!(sio01.srb_csrb & 0x4)) 142 ; 143 } 144 } 145 146 void __init config_apollo(void) 147 { 148 int i; 149 150 dn_setup_model(); 151 152 mach_sched_init=dn_sched_init; /* */ 153 mach_init_IRQ=dn_init_IRQ; 154 mach_hwclk = dn_dummy_hwclk; /* */ 155 mach_reset = dn_dummy_reset; /* */ 156 #ifdef CONFIG_HEARTBEAT 157 mach_heartbeat = dn_heartbeat; 158 #endif 159 mach_get_model = dn_get_model; 160 161 cpuctrl=0xaa00; 162 163 /* clear DMA translation table */ 164 for(i=0;i<0x400;i++) 165 addr_xlat_map[i]=0; 166 167 } 168 169 irqreturn_t dn_timer_int(int irq, void *dev_id) 170 { 171 volatile unsigned char x; 172 173 legacy_timer_tick(1); 174 timer_heartbeat(); 175 176 x = *(volatile unsigned char *)(apollo_timer + 3); 177 x = *(volatile unsigned char *)(apollo_timer + 5); 178 179 return IRQ_HANDLED; 180 } 181 182 void dn_sched_init(void) 183 { 184 /* program timer 1 */ 185 *(volatile unsigned char *)(apollo_timer + 3) = 0x01; 186 *(volatile unsigned char *)(apollo_timer + 1) = 0x40; 187 *(volatile unsigned char *)(apollo_timer + 5) = 0x09; 188 *(volatile unsigned char *)(apollo_timer + 7) = 0xc4; 189 190 /* enable IRQ of PIC B */ 191 *(volatile unsigned char *)(pica+1)&=(~8); 192 193 #if 0 194 pr_info("*(0x10803) %02x\n", 195 *(volatile unsigned char *)(apollo_timer + 0x3)); 196 pr_info("*(0x10803) %02x\n", 197 *(volatile unsigned char *)(apollo_timer + 0x3)); 198 #endif 199 200 if (request_irq(IRQ_APOLLO, dn_timer_int, 0, "time", NULL)) 201 pr_err("Couldn't register timer interrupt\n"); 202 } 203 204 int dn_dummy_hwclk(int op, struct rtc_time *t) { 205 206 207 if(!op) { /* read */ 208 t->tm_sec=rtc->second; 209 t->tm_min=rtc->minute; 210 t->tm_hour=rtc->hours; 211 t->tm_mday=rtc->day_of_month; 212 t->tm_wday=rtc->day_of_week; 213 t->tm_mon = rtc->month - 1; 214 t->tm_year=rtc->year; 215 if (t->tm_year < 70) 216 t->tm_year += 100; 217 } else { 218 rtc->second=t->tm_sec; 219 rtc->minute=t->tm_min; 220 rtc->hours=t->tm_hour; 221 rtc->day_of_month=t->tm_mday; 222 if(t->tm_wday!=-1) 223 rtc->day_of_week=t->tm_wday; 224 rtc->month = t->tm_mon + 1; 225 rtc->year = t->tm_year % 100; 226 } 227 228 return 0; 229 230 } 231 232 void dn_dummy_reset(void) { 233 234 dn_serial_print("The end !\n"); 235 236 for(;;); 237 238 } 239 240 void dn_dummy_waitbut(void) { 241 242 dn_serial_print("waitbut\n"); 243 244 } 245 246 static void dn_get_model(char *model) 247 { 248 strcpy(model, "Apollo "); 249 if (apollo_model >= APOLLO_DN3000 && apollo_model <= APOLLO_DN4500) 250 strcat(model, apollo_models[apollo_model - APOLLO_DN3000]); 251 } 252 253 #ifdef CONFIG_HEARTBEAT 254 static int dn_cpuctrl=0xff00; 255 256 static void dn_heartbeat(int on) { 257 258 if(on) { 259 dn_cpuctrl&=~0x100; 260 cpuctrl=dn_cpuctrl; 261 } 262 else { 263 dn_cpuctrl&=~0x100; 264 dn_cpuctrl|=0x100; 265 cpuctrl=dn_cpuctrl; 266 } 267 } 268 #endif 269 270