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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>
Adrian Bunk612e4842008-02-04 22:30:27 -080028#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30#include <asm/bootinfo.h>
31#include <asm/system.h>
32#include <asm/pgtable.h>
33#include <asm/setup.h>
34#include <asm/irq.h>
35#include <asm/traps.h>
36#include <asm/rtc.h>
37#include <asm/machdep.h>
38#include <asm/mvme16xhw.h>
39
40extern t_bdid mvme_bdid;
41
42static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044static void mvme16x_get_model(char *model);
45static int mvme16x_get_hardware_list(char *buffer);
David Howells40220c12006-10-09 12:19:47 +010046extern void mvme16x_sched_init(irq_handler_t handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047extern unsigned long mvme16x_gettimeoffset (void);
48extern int mvme16x_hwclk (int, struct rtc_time *);
49extern int mvme16x_set_clock_mmss (unsigned long);
50extern void mvme16x_reset (void);
51extern void mvme16x_waitbut(void);
52
53int bcd2int (unsigned char b);
54
55/* Save tick handler routine pointer, will point to do_timer() in
56 * kernel/sched.c, called via mvme16x_process_int() */
57
David Howells40220c12006-10-09 12:19:47 +010058static irq_handler_t tick_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
60
61unsigned short mvme16x_config;
Adrian Bunk612e4842008-02-04 22:30:27 -080062EXPORT_SYMBOL(mvme16x_config);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64
65int mvme16x_parse_bootinfo(const struct bi_record *bi)
66{
67 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
68 return 0;
69 else
70 return 1;
71}
72
73void mvme16x_reset(void)
74{
75 printk ("\r\n\nCalled mvme16x_reset\r\n"
76 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
77 /* The string of returns is to delay the reset until the whole
78 * message is output. Assert reset bit in GCSR */
79 *(volatile char *)0xfff40107 = 0x80;
80}
81
82static void mvme16x_get_model(char *model)
83{
84 p_bdid p = &mvme_bdid;
85 char suf[4];
86
87 suf[1] = p->brdsuffix[0];
88 suf[2] = p->brdsuffix[1];
89 suf[3] = '\0';
90 suf[0] = suf[1] ? '-' : '\0';
91
92 sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
93}
94
95
96static int mvme16x_get_hardware_list(char *buffer)
97{
98 p_bdid p = &mvme_bdid;
99 int len = 0;
100
101 if (p->brdno == 0x0162 || p->brdno == 0x0172)
102 {
103 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
104
105 len += sprintf (buffer+len, "VMEchip2 %spresent\n",
106 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
107 len += sprintf (buffer+len, "SCSI interface %spresent\n",
108 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
109 len += sprintf (buffer+len, "Ethernet i/f %spresent\n",
110 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
111 }
112 else
113 *buffer = '\0';
114
115 return (len);
116}
117
Roman Zippel200a3d32006-06-25 05:47:06 -0700118/*
119 * This function is called during kernel startup to initialize
120 * the mvme16x IRQ handling routines. Should probably ensure
121 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
122 */
123
Al Viro66a3f822007-07-20 04:33:28 +0100124static void __init mvme16x_init_IRQ (void)
Roman Zippel200a3d32006-06-25 05:47:06 -0700125{
126 m68k_setup_user_interrupt(VEC_USER, 192, NULL);
127}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129#define pcc2chip ((volatile u_char *)0xfff42000)
130#define PccSCCMICR 0x1d
131#define PccSCCTICR 0x1e
132#define PccSCCRICR 0x1f
133
134void __init config_mvme16x(void)
135{
136 p_bdid p = &mvme_bdid;
137 char id[40];
138
139 mach_max_dma_address = 0xffffffff;
140 mach_sched_init = mvme16x_sched_init;
141 mach_init_IRQ = mvme16x_init_IRQ;
142 mach_gettimeoffset = mvme16x_gettimeoffset;
143 mach_hwclk = mvme16x_hwclk;
144 mach_set_clock_mmss = mvme16x_set_clock_mmss;
145 mach_reset = mvme16x_reset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 mach_get_model = mvme16x_get_model;
147 mach_get_hardware_list = mvme16x_get_hardware_list;
148
149 /* Report board revision */
150
151 if (strncmp("BDID", p->bdid, 4))
152 {
153 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
154 while (1)
155 ;
156 }
157 /* Board type is only set by newer versions of vmelilo/tftplilo */
158 if (vme_brdtype == 0)
159 vme_brdtype = p->brdno;
160
161 mvme16x_get_model(id);
162 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
163 p->rev&0xf, p->yr, p->mth, p->day);
164 if (p->brdno == 0x0162 || p->brdno == 0x172)
165 {
166 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
167
168 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
169
170 printk ("MVME%x Hardware status:\n", p->brdno);
171 printk (" CPU Type 68%s040\n",
172 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
173 printk (" CPU clock %dMHz\n",
174 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
175 printk (" VMEchip2 %spresent\n",
176 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
177 printk (" SCSI interface %spresent\n",
178 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
179 printk (" Ethernet interface %spresent\n",
180 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
181 }
182 else
183 {
184 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
185
186 /* Dont allow any interrupts from the CD2401 until the interrupt */
187 /* handlers are installed */
188
189 pcc2chip[PccSCCMICR] = 0x10;
190 pcc2chip[PccSCCTICR] = 0x10;
191 pcc2chip[PccSCCRICR] = 0x10;
192 }
193}
194
Al Viro2850bc22006-10-07 14:16:45 +0100195static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196{
197 p_bdid p = &mvme_bdid;
198 unsigned long *new = (unsigned long *)vectors;
199 unsigned long *old = (unsigned long *)0xffe00000;
200 volatile unsigned char uc, *ucp;
201
202 if (p->brdno == 0x0162 || p->brdno == 0x172)
203 {
204 ucp = (volatile unsigned char *)0xfff42043;
205 uc = *ucp | 8;
206 *ucp = uc;
207 }
208 else
209 {
210 *(volatile unsigned long *)0xfff40074 = 0x40000000;
211 }
212 *(new+4) = *(old+4); /* Illegal instruction */
213 *(new+9) = *(old+9); /* Trace */
214 *(new+47) = *(old+47); /* Trap #15 */
215
216 if (p->brdno == 0x0162 || p->brdno == 0x172)
217 *(new+0x5e) = *(old+0x5e); /* ABORT switch */
218 else
219 *(new+0x6e) = *(old+0x6e); /* ABORT switch */
220 return IRQ_HANDLED;
221}
222
Al Viro2850bc22006-10-07 14:16:45 +0100223static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
225 *(volatile unsigned char *)0xfff4201b |= 8;
Al Viro2850bc22006-10-07 14:16:45 +0100226 return tick_handler(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227}
228
David Howells40220c12006-10-09 12:19:47 +0100229void mvme16x_sched_init (irq_handler_t timer_routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
231 p_bdid p = &mvme_bdid;
232 int irq;
233
234 tick_handler = timer_routine;
235 /* Using PCCchip2 or MC2 chip tick timer 1 */
236 *(volatile unsigned long *)0xfff42008 = 0;
237 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
238 *(volatile unsigned char *)0xfff42017 |= 3;
239 *(volatile unsigned char *)0xfff4201b = 0x16;
240 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
241 "timer", mvme16x_timer_int))
242 panic ("Couldn't register timer int");
243
244 if (p->brdno == 0x0162 || p->brdno == 0x172)
245 irq = MVME162_IRQ_ABORT;
246 else
247 irq = MVME167_IRQ_ABORT;
248 if (request_irq(irq, mvme16x_abort_int, 0,
249 "abort", mvme16x_abort_int))
250 panic ("Couldn't register abort int");
251}
252
253
254/* This is always executed with interrupts disabled. */
255unsigned long mvme16x_gettimeoffset (void)
256{
257 return (*(volatile unsigned long *)0xfff42008);
258}
259
260int bcd2int (unsigned char b)
261{
262 return ((b>>4)*10 + (b&15));
263}
264
265int mvme16x_hwclk(int op, struct rtc_time *t)
266{
267#warning check me!
268 if (!op) {
269 rtc->ctrl = RTC_READ;
270 t->tm_year = bcd2int (rtc->bcd_year);
271 t->tm_mon = bcd2int (rtc->bcd_mth);
272 t->tm_mday = bcd2int (rtc->bcd_dom);
273 t->tm_hour = bcd2int (rtc->bcd_hr);
274 t->tm_min = bcd2int (rtc->bcd_min);
275 t->tm_sec = bcd2int (rtc->bcd_sec);
276 rtc->ctrl = 0;
277 }
278 return 0;
279}
280
281int mvme16x_set_clock_mmss (unsigned long nowtime)
282{
283 return 0;
284}
285