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/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
44static void mvme16x_get_model(char *model);
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);
50
51int bcd2int (unsigned char b);
52
53/* Save tick handler routine pointer, will point to xtime_update() in
54 * kernel/time/timekeeping.c, called via mvme16x_process_int() */
55
56static irq_handler_t tick_handler;
57
58
59unsigned short mvme16x_config;
60EXPORT_SYMBOL(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 void mvme16x_get_hardware_list(struct seq_file *m)
95{
96    p_bdid p = &mvme_bdid;
97
98    if (p->brdno == 0x0162 || p->brdno == 0x0172)
99    {
100	unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
101
102	seq_printf (m, "VMEchip2        %spresent\n",
103			rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
104	seq_printf (m, "SCSI interface  %spresent\n",
105			rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
106	seq_printf (m, "Ethernet i/f    %spresent\n",
107			rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
108    }
109}
110
111/*
112 * This function is called during kernel startup to initialize
113 * the mvme16x IRQ handling routines.  Should probably ensure
114 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
115 */
116
117static void __init mvme16x_init_IRQ (void)
118{
119	m68k_setup_user_interrupt(VEC_USER, 192);
120}
121
122#define pcc2chip	((volatile u_char *)0xfff42000)
123#define PccSCCMICR	0x1d
124#define PccSCCTICR	0x1e
125#define PccSCCRICR	0x1f
126#define PccTPIACKR	0x25
127
128#ifdef CONFIG_EARLY_PRINTK
129
130/**** cd2401 registers ****/
131#define CD2401_ADDR	(0xfff45000)
132
133#define CyGFRCR         (0x81)
134#define CyCCR		(0x13)
135#define      CyCLR_CHAN		(0x40)
136#define      CyINIT_CHAN	(0x20)
137#define      CyCHIP_RESET	(0x10)
138#define      CyENB_XMTR		(0x08)
139#define      CyDIS_XMTR		(0x04)
140#define      CyENB_RCVR		(0x02)
141#define      CyDIS_RCVR		(0x01)
142#define CyCAR		(0xee)
143#define CyIER		(0x11)
144#define      CyMdmCh		(0x80)
145#define      CyRxExc		(0x20)
146#define      CyRxData		(0x08)
147#define      CyTxMpty		(0x02)
148#define      CyTxRdy		(0x01)
149#define CyLICR		(0x26)
150#define CyRISR		(0x89)
151#define      CyTIMEOUT		(0x80)
152#define      CySPECHAR		(0x70)
153#define      CyOVERRUN		(0x08)
154#define      CyPARITY		(0x04)
155#define      CyFRAME		(0x02)
156#define      CyBREAK		(0x01)
157#define CyREOIR		(0x84)
158#define CyTEOIR		(0x85)
159#define CyMEOIR		(0x86)
160#define      CyNOTRANS		(0x08)
161#define CyRFOC		(0x30)
162#define CyRDR		(0xf8)
163#define CyTDR		(0xf8)
164#define CyMISR		(0x8b)
165#define CyRISR		(0x89)
166#define CyTISR		(0x8a)
167#define CyMSVR1		(0xde)
168#define CyMSVR2		(0xdf)
169#define      CyDSR		(0x80)
170#define      CyDCD		(0x40)
171#define      CyCTS		(0x20)
172#define      CyDTR		(0x02)
173#define      CyRTS		(0x01)
174#define CyRTPRL		(0x25)
175#define CyRTPRH		(0x24)
176#define CyCOR1		(0x10)
177#define      CyPARITY_NONE	(0x00)
178#define      CyPARITY_E		(0x40)
179#define      CyPARITY_O		(0xC0)
180#define      Cy_5_BITS		(0x04)
181#define      Cy_6_BITS		(0x05)
182#define      Cy_7_BITS		(0x06)
183#define      Cy_8_BITS		(0x07)
184#define CyCOR2		(0x17)
185#define      CyETC		(0x20)
186#define      CyCtsAE		(0x02)
187#define CyCOR3		(0x16)
188#define      Cy_1_STOP		(0x02)
189#define      Cy_2_STOP		(0x04)
190#define CyCOR4		(0x15)
191#define      CyREC_FIFO		(0x0F)  /* Receive FIFO threshold */
192#define CyCOR5		(0x14)
193#define CyCOR6		(0x18)
194#define CyCOR7		(0x07)
195#define CyRBPR		(0xcb)
196#define CyRCOR		(0xc8)
197#define CyTBPR		(0xc3)
198#define CyTCOR		(0xc0)
199#define CySCHR1		(0x1f)
200#define CySCHR2 	(0x1e)
201#define CyTPR		(0xda)
202#define CyPILR1		(0xe3)
203#define CyPILR2		(0xe0)
204#define CyPILR3		(0xe1)
205#define CyCMR		(0x1b)
206#define      CyASYNC		(0x02)
207#define CyLICR          (0x26)
208#define CyLIVR          (0x09)
209#define CySCRL		(0x23)
210#define CySCRH		(0x22)
211#define CyTFTC		(0x80)
212
213static void cons_write(struct console *co, const char *str, unsigned count)
214{
215	volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
216	volatile u_char sink;
217	u_char ier;
218	int port;
219	u_char do_lf = 0;
220	int i = 0;
221
222	/* Ensure transmitter is enabled! */
223
224	port = 0;
225	base_addr[CyCAR] = (u_char)port;
226	while (base_addr[CyCCR])
227		;
228	base_addr[CyCCR] = CyENB_XMTR;
229
230	ier = base_addr[CyIER];
231	base_addr[CyIER] = CyTxMpty;
232
233	while (1) {
234		if (pcc2chip[PccSCCTICR] & 0x20)
235		{
236			/* We have a Tx int. Acknowledge it */
237			sink = pcc2chip[PccTPIACKR];
238			if ((base_addr[CyLICR] >> 2) == port) {
239				if (i == count) {
240					/* Last char of string is now output */
241					base_addr[CyTEOIR] = CyNOTRANS;
242					break;
243				}
244				if (do_lf) {
245					base_addr[CyTDR] = '\n';
246					str++;
247					i++;
248					do_lf = 0;
249				}
250				else if (*str == '\n') {
251					base_addr[CyTDR] = '\r';
252					do_lf = 1;
253				}
254				else {
255					base_addr[CyTDR] = *str++;
256					i++;
257				}
258				base_addr[CyTEOIR] = 0;
259			}
260			else
261				base_addr[CyTEOIR] = CyNOTRANS;
262		}
263	}
264
265	base_addr[CyIER] = ier;
266}
267
268static struct console cons_info =
269{
270	.name	= "sercon",
271	.write	= cons_write,
272	.flags	= CON_PRINTBUFFER | CON_BOOT,
273	.index	= -1,
274};
275
276static void __init mvme16x_early_console(void)
277{
278	register_console(&cons_info);
279
280	printk(KERN_INFO "MVME16x: early console registered\n");
281}
282#endif
283
284void __init config_mvme16x(void)
285{
286    p_bdid p = &mvme_bdid;
287    char id[40];
288
289    mach_max_dma_address = 0xffffffff;
290    mach_sched_init      = mvme16x_sched_init;
291    mach_init_IRQ        = mvme16x_init_IRQ;
292    mach_gettimeoffset   = mvme16x_gettimeoffset;
293    mach_hwclk           = mvme16x_hwclk;
294    mach_set_clock_mmss	 = mvme16x_set_clock_mmss;
295    mach_reset		 = mvme16x_reset;
296    mach_get_model       = mvme16x_get_model;
297    mach_get_hardware_list = mvme16x_get_hardware_list;
298
299    /* Report board revision */
300
301    if (strncmp("BDID", p->bdid, 4))
302    {
303	printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
304	while (1)
305		;
306    }
307    /* Board type is only set by newer versions of vmelilo/tftplilo */
308    if (vme_brdtype == 0)
309	vme_brdtype = p->brdno;
310
311    mvme16x_get_model(id);
312    printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
313					p->rev&0xf, p->yr, p->mth, p->day);
314    if (p->brdno == 0x0162 || p->brdno == 0x172)
315    {
316	unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
317
318	mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
319
320	printk ("MVME%x Hardware status:\n", p->brdno);
321	printk ("    CPU Type           68%s040\n",
322			rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
323	printk ("    CPU clock          %dMHz\n",
324			rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
325	printk ("    VMEchip2           %spresent\n",
326			rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
327	printk ("    SCSI interface     %spresent\n",
328			rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
329	printk ("    Ethernet interface %spresent\n",
330			rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
331    }
332    else
333    {
334	mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
335
336	/* Dont allow any interrupts from the CD2401 until the interrupt */
337	/* handlers are installed					 */
338
339	pcc2chip[PccSCCMICR] = 0x10;
340	pcc2chip[PccSCCTICR] = 0x10;
341	pcc2chip[PccSCCRICR] = 0x10;
342#ifdef CONFIG_EARLY_PRINTK
343	mvme16x_early_console();
344#endif
345    }
346}
347
348static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
349{
350	p_bdid p = &mvme_bdid;
351	unsigned long *new = (unsigned long *)vectors;
352	unsigned long *old = (unsigned long *)0xffe00000;
353	volatile unsigned char uc, *ucp;
354
355	if (p->brdno == 0x0162 || p->brdno == 0x172)
356	{
357		ucp = (volatile unsigned char *)0xfff42043;
358		uc = *ucp | 8;
359		*ucp = uc;
360	}
361	else
362	{
363		*(volatile unsigned long *)0xfff40074 = 0x40000000;
364	}
365	*(new+4) = *(old+4);		/* Illegal instruction */
366	*(new+9) = *(old+9);		/* Trace */
367	*(new+47) = *(old+47);		/* Trap #15 */
368
369	if (p->brdno == 0x0162 || p->brdno == 0x172)
370		*(new+0x5e) = *(old+0x5e);	/* ABORT switch */
371	else
372		*(new+0x6e) = *(old+0x6e);	/* ABORT switch */
373	return IRQ_HANDLED;
374}
375
376static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
377{
378    *(volatile unsigned char *)0xfff4201b |= 8;
379    return tick_handler(irq, dev_id);
380}
381
382void mvme16x_sched_init (irq_handler_t timer_routine)
383{
384    p_bdid p = &mvme_bdid;
385    int irq;
386
387    tick_handler = timer_routine;
388    /* Using PCCchip2 or MC2 chip tick timer 1 */
389    *(volatile unsigned long *)0xfff42008 = 0;
390    *(volatile unsigned long *)0xfff42004 = 10000;	/* 10ms */
391    *(volatile unsigned char *)0xfff42017 |= 3;
392    *(volatile unsigned char *)0xfff4201b = 0x16;
393    if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
394				"timer", mvme16x_timer_int))
395	panic ("Couldn't register timer int");
396
397    if (p->brdno == 0x0162 || p->brdno == 0x172)
398	irq = MVME162_IRQ_ABORT;
399    else
400        irq = MVME167_IRQ_ABORT;
401    if (request_irq(irq, mvme16x_abort_int, 0,
402				"abort", mvme16x_abort_int))
403	panic ("Couldn't register abort int");
404}
405
406
407/* This is always executed with interrupts disabled.  */
408unsigned long mvme16x_gettimeoffset (void)
409{
410    return (*(volatile unsigned long *)0xfff42008);
411}
412
413int bcd2int (unsigned char b)
414{
415	return ((b>>4)*10 + (b&15));
416}
417
418int mvme16x_hwclk(int op, struct rtc_time *t)
419{
420#warning check me!
421	if (!op) {
422		rtc->ctrl = RTC_READ;
423		t->tm_year = bcd2int (rtc->bcd_year);
424		t->tm_mon  = bcd2int (rtc->bcd_mth);
425		t->tm_mday = bcd2int (rtc->bcd_dom);
426		t->tm_hour = bcd2int (rtc->bcd_hr);
427		t->tm_min  = bcd2int (rtc->bcd_min);
428		t->tm_sec  = bcd2int (rtc->bcd_sec);
429		rtc->ctrl = 0;
430	}
431	return 0;
432}
433
434int mvme16x_set_clock_mmss (unsigned long nowtime)
435{
436	return 0;
437}
438
439