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