1 /*
2 * arch/m68k/mvme16x/config.c
3 *
4 * Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
5 *
6 * Based on:
7 *
8 * linux/amiga/config.c
9 *
10 * Copyright (C) 1993 Hamish Macdonald
11 *
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file README.legal in the main directory of this archive
14 * for more details.
15 */
16
17 #include <linux/types.h>
18 #include <linux/kernel.h>
19 #include <linux/mm.h>
20 #include <linux/seq_file.h>
21 #include <linux/tty.h>
22 #include <linux/console.h>
23 #include <linux/linkage.h>
24 #include <linux/init.h>
25 #include <linux/major.h>
26 #include <linux/genhd.h>
27 #include <linux/rtc.h>
28 #include <linux/interrupt.h>
29 #include <linux/module.h>
30
31 #include <asm/bootinfo.h>
32 #include <asm/system.h>
33 #include <asm/pgtable.h>
34 #include <asm/setup.h>
35 #include <asm/irq.h>
36 #include <asm/traps.h>
37 #include <asm/rtc.h>
38 #include <asm/machdep.h>
39 #include <asm/mvme16xhw.h>
40
41 extern t_bdid mvme_bdid;
42
43 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
44
45 static void mvme16x_get_model(char *model);
46 extern void mvme16x_sched_init(irq_handler_t handler);
47 extern unsigned long mvme16x_gettimeoffset (void);
48 extern int mvme16x_hwclk (int, struct rtc_time *);
49 extern int mvme16x_set_clock_mmss (unsigned long);
50 extern void mvme16x_reset (void);
51
52 int bcd2int (unsigned char b);
53
54 /* Save tick handler routine pointer, will point to do_timer() in
55 * kernel/sched.c, called via mvme16x_process_int() */
56
57 static irq_handler_t tick_handler;
58
59
60 unsigned short mvme16x_config;
61 EXPORT_SYMBOL(mvme16x_config);
62
63
mvme16x_parse_bootinfo(const struct bi_record * bi)64 int mvme16x_parse_bootinfo(const struct bi_record *bi)
65 {
66 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
67 return 0;
68 else
69 return 1;
70 }
71
mvme16x_reset(void)72 void mvme16x_reset(void)
73 {
74 printk ("\r\n\nCalled mvme16x_reset\r\n"
75 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
76 /* The string of returns is to delay the reset until the whole
77 * message is output. Assert reset bit in GCSR */
78 *(volatile char *)0xfff40107 = 0x80;
79 }
80
mvme16x_get_model(char * model)81 static void mvme16x_get_model(char *model)
82 {
83 p_bdid p = &mvme_bdid;
84 char suf[4];
85
86 suf[1] = p->brdsuffix[0];
87 suf[2] = p->brdsuffix[1];
88 suf[3] = '\0';
89 suf[0] = suf[1] ? '-' : '\0';
90
91 sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
92 }
93
94
mvme16x_get_hardware_list(struct seq_file * m)95 static void mvme16x_get_hardware_list(struct seq_file *m)
96 {
97 p_bdid p = &mvme_bdid;
98
99 if (p->brdno == 0x0162 || p->brdno == 0x0172)
100 {
101 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
102
103 seq_printf (m, "VMEchip2 %spresent\n",
104 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
105 seq_printf (m, "SCSI interface %spresent\n",
106 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
107 seq_printf (m, "Ethernet i/f %spresent\n",
108 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
109 }
110 }
111
112 /*
113 * This function is called during kernel startup to initialize
114 * the mvme16x IRQ handling routines. Should probably ensure
115 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
116 */
117
mvme16x_init_IRQ(void)118 static void __init mvme16x_init_IRQ (void)
119 {
120 m68k_setup_user_interrupt(VEC_USER, 192, NULL);
121 }
122
123 #define pcc2chip ((volatile u_char *)0xfff42000)
124 #define PccSCCMICR 0x1d
125 #define PccSCCTICR 0x1e
126 #define PccSCCRICR 0x1f
127
config_mvme16x(void)128 void __init config_mvme16x(void)
129 {
130 p_bdid p = &mvme_bdid;
131 char id[40];
132
133 mach_max_dma_address = 0xffffffff;
134 mach_sched_init = mvme16x_sched_init;
135 mach_init_IRQ = mvme16x_init_IRQ;
136 mach_gettimeoffset = mvme16x_gettimeoffset;
137 mach_hwclk = mvme16x_hwclk;
138 mach_set_clock_mmss = mvme16x_set_clock_mmss;
139 mach_reset = mvme16x_reset;
140 mach_get_model = mvme16x_get_model;
141 mach_get_hardware_list = mvme16x_get_hardware_list;
142
143 /* Report board revision */
144
145 if (strncmp("BDID", p->bdid, 4))
146 {
147 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
148 while (1)
149 ;
150 }
151 /* Board type is only set by newer versions of vmelilo/tftplilo */
152 if (vme_brdtype == 0)
153 vme_brdtype = p->brdno;
154
155 mvme16x_get_model(id);
156 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
157 p->rev&0xf, p->yr, p->mth, p->day);
158 if (p->brdno == 0x0162 || p->brdno == 0x172)
159 {
160 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
161
162 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
163
164 printk ("MVME%x Hardware status:\n", p->brdno);
165 printk (" CPU Type 68%s040\n",
166 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
167 printk (" CPU clock %dMHz\n",
168 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
169 printk (" VMEchip2 %spresent\n",
170 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
171 printk (" SCSI interface %spresent\n",
172 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
173 printk (" Ethernet interface %spresent\n",
174 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
175 }
176 else
177 {
178 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
179
180 /* Dont allow any interrupts from the CD2401 until the interrupt */
181 /* handlers are installed */
182
183 pcc2chip[PccSCCMICR] = 0x10;
184 pcc2chip[PccSCCTICR] = 0x10;
185 pcc2chip[PccSCCRICR] = 0x10;
186 }
187 }
188
mvme16x_abort_int(int irq,void * dev_id)189 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
190 {
191 p_bdid p = &mvme_bdid;
192 unsigned long *new = (unsigned long *)vectors;
193 unsigned long *old = (unsigned long *)0xffe00000;
194 volatile unsigned char uc, *ucp;
195
196 if (p->brdno == 0x0162 || p->brdno == 0x172)
197 {
198 ucp = (volatile unsigned char *)0xfff42043;
199 uc = *ucp | 8;
200 *ucp = uc;
201 }
202 else
203 {
204 *(volatile unsigned long *)0xfff40074 = 0x40000000;
205 }
206 *(new+4) = *(old+4); /* Illegal instruction */
207 *(new+9) = *(old+9); /* Trace */
208 *(new+47) = *(old+47); /* Trap #15 */
209
210 if (p->brdno == 0x0162 || p->brdno == 0x172)
211 *(new+0x5e) = *(old+0x5e); /* ABORT switch */
212 else
213 *(new+0x6e) = *(old+0x6e); /* ABORT switch */
214 return IRQ_HANDLED;
215 }
216
mvme16x_timer_int(int irq,void * dev_id)217 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
218 {
219 *(volatile unsigned char *)0xfff4201b |= 8;
220 return tick_handler(irq, dev_id);
221 }
222
mvme16x_sched_init(irq_handler_t timer_routine)223 void mvme16x_sched_init (irq_handler_t timer_routine)
224 {
225 p_bdid p = &mvme_bdid;
226 int irq;
227
228 tick_handler = timer_routine;
229 /* Using PCCchip2 or MC2 chip tick timer 1 */
230 *(volatile unsigned long *)0xfff42008 = 0;
231 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
232 *(volatile unsigned char *)0xfff42017 |= 3;
233 *(volatile unsigned char *)0xfff4201b = 0x16;
234 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
235 "timer", mvme16x_timer_int))
236 panic ("Couldn't register timer int");
237
238 if (p->brdno == 0x0162 || p->brdno == 0x172)
239 irq = MVME162_IRQ_ABORT;
240 else
241 irq = MVME167_IRQ_ABORT;
242 if (request_irq(irq, mvme16x_abort_int, 0,
243 "abort", mvme16x_abort_int))
244 panic ("Couldn't register abort int");
245 }
246
247
248 /* This is always executed with interrupts disabled. */
mvme16x_gettimeoffset(void)249 unsigned long mvme16x_gettimeoffset (void)
250 {
251 return (*(volatile unsigned long *)0xfff42008);
252 }
253
bcd2int(unsigned char b)254 int bcd2int (unsigned char b)
255 {
256 return ((b>>4)*10 + (b&15));
257 }
258
mvme16x_hwclk(int op,struct rtc_time * t)259 int mvme16x_hwclk(int op, struct rtc_time *t)
260 {
261 #warning check me!
262 if (!op) {
263 rtc->ctrl = RTC_READ;
264 t->tm_year = bcd2int (rtc->bcd_year);
265 t->tm_mon = bcd2int (rtc->bcd_mth);
266 t->tm_mday = bcd2int (rtc->bcd_dom);
267 t->tm_hour = bcd2int (rtc->bcd_hr);
268 t->tm_min = bcd2int (rtc->bcd_min);
269 t->tm_sec = bcd2int (rtc->bcd_sec);
270 rtc->ctrl = 0;
271 }
272 return 0;
273 }
274
mvme16x_set_clock_mmss(unsigned long nowtime)275 int mvme16x_set_clock_mmss (unsigned long nowtime)
276 {
277 return 0;
278 }
279
280