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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/tty.h>
21#include <linux/console.h>
22#include <linux/linkage.h>
23#include <linux/init.h>
24#include <linux/major.h>
25#include <linux/genhd.h>
26#include <linux/rtc.h>
27#include <linux/interrupt.h>
28
29#include <asm/bootinfo.h>
30#include <asm/system.h>
31#include <asm/pgtable.h>
32#include <asm/setup.h>
33#include <asm/irq.h>
34#include <asm/traps.h>
35#include <asm/rtc.h>
36#include <asm/machdep.h>
37#include <asm/mvme16xhw.h>
38
39extern t_bdid mvme_bdid;
40
41static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043static void mvme16x_get_model(char *model);
44static int mvme16x_get_hardware_list(char *buffer);
Al Viro2850bc22006-10-07 14:16:45 +010045extern void mvme16x_sched_init(irqreturn_t (*handler)(int, void *));
Linus Torvalds1da177e2005-04-16 15:20:36 -070046extern unsigned long mvme16x_gettimeoffset (void);
47extern int mvme16x_hwclk (int, struct rtc_time *);
48extern int mvme16x_set_clock_mmss (unsigned long);
49extern void mvme16x_reset (void);
50extern void mvme16x_waitbut(void);
51
52int 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
Al Viro2850bc22006-10-07 14:16:45 +010057static irqreturn_t (*tick_handler)(int, void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59
60unsigned short mvme16x_config;
61
62
63int mvme16x_parse_bootinfo(const struct bi_record *bi)
64{
65 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
66 return 0;
67 else
68 return 1;
69}
70
71void mvme16x_reset(void)
72{
73 printk ("\r\n\nCalled mvme16x_reset\r\n"
74 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
75 /* The string of returns is to delay the reset until the whole
76 * message is output. Assert reset bit in GCSR */
77 *(volatile char *)0xfff40107 = 0x80;
78}
79
80static void mvme16x_get_model(char *model)
81{
82 p_bdid p = &mvme_bdid;
83 char suf[4];
84
85 suf[1] = p->brdsuffix[0];
86 suf[2] = p->brdsuffix[1];
87 suf[3] = '\0';
88 suf[0] = suf[1] ? '-' : '\0';
89
90 sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
91}
92
93
94static int mvme16x_get_hardware_list(char *buffer)
95{
96 p_bdid p = &mvme_bdid;
97 int len = 0;
98
99 if (p->brdno == 0x0162 || p->brdno == 0x0172)
100 {
101 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
102
103 len += sprintf (buffer+len, "VMEchip2 %spresent\n",
104 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
105 len += sprintf (buffer+len, "SCSI interface %spresent\n",
106 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
107 len += sprintf (buffer+len, "Ethernet i/f %spresent\n",
108 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
109 }
110 else
111 *buffer = '\0';
112
113 return (len);
114}
115
Roman Zippel200a3d32006-06-25 05:47:06 -0700116/*
117 * This function is called during kernel startup to initialize
118 * the mvme16x IRQ handling routines. Should probably ensure
119 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
120 */
121
122static void mvme16x_init_IRQ (void)
123{
124 m68k_setup_user_interrupt(VEC_USER, 192, NULL);
125}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127#define pcc2chip ((volatile u_char *)0xfff42000)
128#define PccSCCMICR 0x1d
129#define PccSCCTICR 0x1e
130#define PccSCCRICR 0x1f
131
132void __init config_mvme16x(void)
133{
134 p_bdid p = &mvme_bdid;
135 char id[40];
136
137 mach_max_dma_address = 0xffffffff;
138 mach_sched_init = mvme16x_sched_init;
139 mach_init_IRQ = mvme16x_init_IRQ;
140 mach_gettimeoffset = mvme16x_gettimeoffset;
141 mach_hwclk = mvme16x_hwclk;
142 mach_set_clock_mmss = mvme16x_set_clock_mmss;
143 mach_reset = mvme16x_reset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 mach_get_model = mvme16x_get_model;
145 mach_get_hardware_list = mvme16x_get_hardware_list;
146
147 /* Report board revision */
148
149 if (strncmp("BDID", p->bdid, 4))
150 {
151 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
152 while (1)
153 ;
154 }
155 /* Board type is only set by newer versions of vmelilo/tftplilo */
156 if (vme_brdtype == 0)
157 vme_brdtype = p->brdno;
158
159 mvme16x_get_model(id);
160 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
161 p->rev&0xf, p->yr, p->mth, p->day);
162 if (p->brdno == 0x0162 || p->brdno == 0x172)
163 {
164 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
165
166 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
167
168 printk ("MVME%x Hardware status:\n", p->brdno);
169 printk (" CPU Type 68%s040\n",
170 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
171 printk (" CPU clock %dMHz\n",
172 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
173 printk (" VMEchip2 %spresent\n",
174 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
175 printk (" SCSI interface %spresent\n",
176 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
177 printk (" Ethernet interface %spresent\n",
178 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
179 }
180 else
181 {
182 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
183
184 /* Dont allow any interrupts from the CD2401 until the interrupt */
185 /* handlers are installed */
186
187 pcc2chip[PccSCCMICR] = 0x10;
188 pcc2chip[PccSCCTICR] = 0x10;
189 pcc2chip[PccSCCRICR] = 0x10;
190 }
191}
192
Al Viro2850bc22006-10-07 14:16:45 +0100193static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
195 p_bdid p = &mvme_bdid;
196 unsigned long *new = (unsigned long *)vectors;
197 unsigned long *old = (unsigned long *)0xffe00000;
198 volatile unsigned char uc, *ucp;
199
200 if (p->brdno == 0x0162 || p->brdno == 0x172)
201 {
202 ucp = (volatile unsigned char *)0xfff42043;
203 uc = *ucp | 8;
204 *ucp = uc;
205 }
206 else
207 {
208 *(volatile unsigned long *)0xfff40074 = 0x40000000;
209 }
210 *(new+4) = *(old+4); /* Illegal instruction */
211 *(new+9) = *(old+9); /* Trace */
212 *(new+47) = *(old+47); /* Trap #15 */
213
214 if (p->brdno == 0x0162 || p->brdno == 0x172)
215 *(new+0x5e) = *(old+0x5e); /* ABORT switch */
216 else
217 *(new+0x6e) = *(old+0x6e); /* ABORT switch */
218 return IRQ_HANDLED;
219}
220
Al Viro2850bc22006-10-07 14:16:45 +0100221static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
223 *(volatile unsigned char *)0xfff4201b |= 8;
Al Viro2850bc22006-10-07 14:16:45 +0100224 return tick_handler(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225}
226
Al Viro2850bc22006-10-07 14:16:45 +0100227void mvme16x_sched_init (irqreturn_t (*timer_routine)(int, void *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
229 p_bdid p = &mvme_bdid;
230 int irq;
231
232 tick_handler = timer_routine;
233 /* Using PCCchip2 or MC2 chip tick timer 1 */
234 *(volatile unsigned long *)0xfff42008 = 0;
235 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
236 *(volatile unsigned char *)0xfff42017 |= 3;
237 *(volatile unsigned char *)0xfff4201b = 0x16;
238 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
239 "timer", mvme16x_timer_int))
240 panic ("Couldn't register timer int");
241
242 if (p->brdno == 0x0162 || p->brdno == 0x172)
243 irq = MVME162_IRQ_ABORT;
244 else
245 irq = MVME167_IRQ_ABORT;
246 if (request_irq(irq, mvme16x_abort_int, 0,
247 "abort", mvme16x_abort_int))
248 panic ("Couldn't register abort int");
249}
250
251
252/* This is always executed with interrupts disabled. */
253unsigned long mvme16x_gettimeoffset (void)
254{
255 return (*(volatile unsigned long *)0xfff42008);
256}
257
258int bcd2int (unsigned char b)
259{
260 return ((b>>4)*10 + (b&15));
261}
262
263int mvme16x_hwclk(int op, struct rtc_time *t)
264{
265#warning check me!
266 if (!op) {
267 rtc->ctrl = RTC_READ;
268 t->tm_year = bcd2int (rtc->bcd_year);
269 t->tm_mon = bcd2int (rtc->bcd_mth);
270 t->tm_mday = bcd2int (rtc->bcd_dom);
271 t->tm_hour = bcd2int (rtc->bcd_hr);
272 t->tm_min = bcd2int (rtc->bcd_min);
273 t->tm_sec = bcd2int (rtc->bcd_sec);
274 rtc->ctrl = 0;
275 }
276 return 0;
277}
278
279int mvme16x_set_clock_mmss (unsigned long nowtime)
280{
281 return 0;
282}
283