config.c

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