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/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
43static void mvme16x_get_model(char *model);
44static int  mvme16x_get_hardware_list(char *buffer);
45extern void mvme16x_sched_init(irq_handler_t handler);
46extern 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
57static irq_handler_t tick_handler;
58
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
116/*
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}
126
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;
144    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
193static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
194{
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
221static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
222{
223    *(volatile unsigned char *)0xfff4201b |= 8;
224    return tick_handler(irq, dev_id);
225}
226
227void mvme16x_sched_init (irq_handler_t timer_routine)
228{
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