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
apollo_parse_bootinfo(const struct bi_record * record)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
dn_setup_model(void)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
dn_serial_console_wait_key(struct console * co)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
dn_serial_console_write(struct console * co,const char * str,unsigned int count)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
dn_serial_print(const char * str)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
config_apollo(void)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
dn_timer_int(int irq,void * dev_id)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
dn_sched_init(void)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
dn_dummy_hwclk(int op,struct rtc_time * t)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
dn_dummy_reset(void)232 void dn_dummy_reset(void) {
233
234 dn_serial_print("The end !\n");
235
236 for(;;);
237
238 }
239
dn_dummy_waitbut(void)240 void dn_dummy_waitbut(void) {
241
242 dn_serial_print("waitbut\n");
243
244 }
245
dn_get_model(char * model)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
dn_heartbeat(int on)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