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/bootinfo-vme.h>
33 #include <asm/byteorder.h>
34 #include <asm/pgtable.h>
35 #include <asm/setup.h>
36 #include <asm/irq.h>
37 #include <asm/traps.h>
38 #include <asm/rtc.h>
39 #include <asm/machdep.h>
40 #include <asm/mvme16xhw.h>
41
42 extern t_bdid mvme_bdid;
43
44 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
45
46 static void mvme16x_get_model(char *model);
47 extern void mvme16x_sched_init(irq_handler_t handler);
48 extern u32 mvme16x_gettimeoffset(void);
49 extern int mvme16x_hwclk (int, struct rtc_time *);
50 extern int mvme16x_set_clock_mmss (unsigned long);
51 extern void mvme16x_reset (void);
52
53 int bcd2int (unsigned char b);
54
55
56 unsigned short mvme16x_config;
57 EXPORT_SYMBOL(mvme16x_config);
58
59
mvme16x_parse_bootinfo(const struct bi_record * bi)60 int __init mvme16x_parse_bootinfo(const struct bi_record *bi)
61 {
62 uint16_t tag = be16_to_cpu(bi->tag);
63 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
64 return 0;
65 else
66 return 1;
67 }
68
mvme16x_reset(void)69 void mvme16x_reset(void)
70 {
71 printk ("\r\n\nCalled mvme16x_reset\r\n"
72 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
73 /* The string of returns is to delay the reset until the whole
74 * message is output. Assert reset bit in GCSR */
75 *(volatile char *)0xfff40107 = 0x80;
76 }
77
mvme16x_get_model(char * model)78 static void mvme16x_get_model(char *model)
79 {
80 p_bdid p = &mvme_bdid;
81 char suf[4];
82
83 suf[1] = p->brdsuffix[0];
84 suf[2] = p->brdsuffix[1];
85 suf[3] = '\0';
86 suf[0] = suf[1] ? '-' : '\0';
87
88 sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf);
89 }
90
91
mvme16x_get_hardware_list(struct seq_file * m)92 static void mvme16x_get_hardware_list(struct seq_file *m)
93 {
94 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
95
96 if (brdno == 0x0162 || brdno == 0x0172)
97 {
98 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
99
100 seq_printf (m, "VMEchip2 %spresent\n",
101 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
102 seq_printf (m, "SCSI interface %spresent\n",
103 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
104 seq_printf (m, "Ethernet i/f %spresent\n",
105 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
106 }
107 }
108
109 /*
110 * This function is called during kernel startup to initialize
111 * the mvme16x IRQ handling routines. Should probably ensure
112 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
113 */
114
mvme16x_init_IRQ(void)115 static void __init mvme16x_init_IRQ (void)
116 {
117 m68k_setup_user_interrupt(VEC_USER, 192);
118 }
119
120 #define pcc2chip ((volatile u_char *)0xfff42000)
121 #define PccSCCMICR 0x1d
122 #define PccSCCTICR 0x1e
123 #define PccSCCRICR 0x1f
124 #define PccTPIACKR 0x25
125
126 #ifdef CONFIG_EARLY_PRINTK
127
128 /**** cd2401 registers ****/
129 #define CD2401_ADDR (0xfff45000)
130
131 #define CyGFRCR (0x81)
132 #define CyCCR (0x13)
133 #define CyCLR_CHAN (0x40)
134 #define CyINIT_CHAN (0x20)
135 #define CyCHIP_RESET (0x10)
136 #define CyENB_XMTR (0x08)
137 #define CyDIS_XMTR (0x04)
138 #define CyENB_RCVR (0x02)
139 #define CyDIS_RCVR (0x01)
140 #define CyCAR (0xee)
141 #define CyIER (0x11)
142 #define CyMdmCh (0x80)
143 #define CyRxExc (0x20)
144 #define CyRxData (0x08)
145 #define CyTxMpty (0x02)
146 #define CyTxRdy (0x01)
147 #define CyLICR (0x26)
148 #define CyRISR (0x89)
149 #define CyTIMEOUT (0x80)
150 #define CySPECHAR (0x70)
151 #define CyOVERRUN (0x08)
152 #define CyPARITY (0x04)
153 #define CyFRAME (0x02)
154 #define CyBREAK (0x01)
155 #define CyREOIR (0x84)
156 #define CyTEOIR (0x85)
157 #define CyMEOIR (0x86)
158 #define CyNOTRANS (0x08)
159 #define CyRFOC (0x30)
160 #define CyRDR (0xf8)
161 #define CyTDR (0xf8)
162 #define CyMISR (0x8b)
163 #define CyRISR (0x89)
164 #define CyTISR (0x8a)
165 #define CyMSVR1 (0xde)
166 #define CyMSVR2 (0xdf)
167 #define CyDSR (0x80)
168 #define CyDCD (0x40)
169 #define CyCTS (0x20)
170 #define CyDTR (0x02)
171 #define CyRTS (0x01)
172 #define CyRTPRL (0x25)
173 #define CyRTPRH (0x24)
174 #define CyCOR1 (0x10)
175 #define CyPARITY_NONE (0x00)
176 #define CyPARITY_E (0x40)
177 #define CyPARITY_O (0xC0)
178 #define Cy_5_BITS (0x04)
179 #define Cy_6_BITS (0x05)
180 #define Cy_7_BITS (0x06)
181 #define Cy_8_BITS (0x07)
182 #define CyCOR2 (0x17)
183 #define CyETC (0x20)
184 #define CyCtsAE (0x02)
185 #define CyCOR3 (0x16)
186 #define Cy_1_STOP (0x02)
187 #define Cy_2_STOP (0x04)
188 #define CyCOR4 (0x15)
189 #define CyREC_FIFO (0x0F) /* Receive FIFO threshold */
190 #define CyCOR5 (0x14)
191 #define CyCOR6 (0x18)
192 #define CyCOR7 (0x07)
193 #define CyRBPR (0xcb)
194 #define CyRCOR (0xc8)
195 #define CyTBPR (0xc3)
196 #define CyTCOR (0xc0)
197 #define CySCHR1 (0x1f)
198 #define CySCHR2 (0x1e)
199 #define CyTPR (0xda)
200 #define CyPILR1 (0xe3)
201 #define CyPILR2 (0xe0)
202 #define CyPILR3 (0xe1)
203 #define CyCMR (0x1b)
204 #define CyASYNC (0x02)
205 #define CyLICR (0x26)
206 #define CyLIVR (0x09)
207 #define CySCRL (0x23)
208 #define CySCRH (0x22)
209 #define CyTFTC (0x80)
210
mvme16x_cons_write(struct console * co,const char * str,unsigned count)211 void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
212 {
213 volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
214 volatile u_char sink;
215 u_char ier;
216 int port;
217 u_char do_lf = 0;
218 int i = 0;
219
220 /* Ensure transmitter is enabled! */
221
222 port = 0;
223 base_addr[CyCAR] = (u_char)port;
224 while (base_addr[CyCCR])
225 ;
226 base_addr[CyCCR] = CyENB_XMTR;
227
228 ier = base_addr[CyIER];
229 base_addr[CyIER] = CyTxMpty;
230
231 while (1) {
232 if (pcc2chip[PccSCCTICR] & 0x20)
233 {
234 /* We have a Tx int. Acknowledge it */
235 sink = pcc2chip[PccTPIACKR];
236 if ((base_addr[CyLICR] >> 2) == port) {
237 if (i == count) {
238 /* Last char of string is now output */
239 base_addr[CyTEOIR] = CyNOTRANS;
240 break;
241 }
242 if (do_lf) {
243 base_addr[CyTDR] = '\n';
244 str++;
245 i++;
246 do_lf = 0;
247 }
248 else if (*str == '\n') {
249 base_addr[CyTDR] = '\r';
250 do_lf = 1;
251 }
252 else {
253 base_addr[CyTDR] = *str++;
254 i++;
255 }
256 base_addr[CyTEOIR] = 0;
257 }
258 else
259 base_addr[CyTEOIR] = CyNOTRANS;
260 }
261 }
262
263 base_addr[CyIER] = ier;
264 }
265
266 #endif
267
config_mvme16x(void)268 void __init config_mvme16x(void)
269 {
270 p_bdid p = &mvme_bdid;
271 char id[40];
272 uint16_t brdno = be16_to_cpu(p->brdno);
273
274 mach_max_dma_address = 0xffffffff;
275 mach_sched_init = mvme16x_sched_init;
276 mach_init_IRQ = mvme16x_init_IRQ;
277 arch_gettimeoffset = mvme16x_gettimeoffset;
278 mach_hwclk = mvme16x_hwclk;
279 mach_set_clock_mmss = mvme16x_set_clock_mmss;
280 mach_reset = mvme16x_reset;
281 mach_get_model = mvme16x_get_model;
282 mach_get_hardware_list = mvme16x_get_hardware_list;
283
284 /* Report board revision */
285
286 if (strncmp("BDID", p->bdid, 4))
287 {
288 printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
289 while (1)
290 ;
291 }
292 /* Board type is only set by newer versions of vmelilo/tftplilo */
293 if (vme_brdtype == 0)
294 vme_brdtype = brdno;
295
296 mvme16x_get_model(id);
297 printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
298 p->rev&0xf, p->yr, p->mth, p->day);
299 if (brdno == 0x0162 || brdno == 0x172)
300 {
301 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
302
303 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
304
305 printk ("MVME%x Hardware status:\n", brdno);
306 printk (" CPU Type 68%s040\n",
307 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
308 printk (" CPU clock %dMHz\n",
309 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
310 printk (" VMEchip2 %spresent\n",
311 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
312 printk (" SCSI interface %spresent\n",
313 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
314 printk (" Ethernet interface %spresent\n",
315 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
316 }
317 else
318 {
319 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
320 }
321 }
322
mvme16x_abort_int(int irq,void * dev_id)323 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
324 {
325 unsigned long *new = (unsigned long *)vectors;
326 unsigned long *old = (unsigned long *)0xffe00000;
327 volatile unsigned char uc, *ucp;
328 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
329
330 if (brdno == 0x0162 || brdno == 0x172)
331 {
332 ucp = (volatile unsigned char *)0xfff42043;
333 uc = *ucp | 8;
334 *ucp = uc;
335 }
336 else
337 {
338 *(volatile unsigned long *)0xfff40074 = 0x40000000;
339 }
340 *(new+4) = *(old+4); /* Illegal instruction */
341 *(new+9) = *(old+9); /* Trace */
342 *(new+47) = *(old+47); /* Trap #15 */
343
344 if (brdno == 0x0162 || brdno == 0x172)
345 *(new+0x5e) = *(old+0x5e); /* ABORT switch */
346 else
347 *(new+0x6e) = *(old+0x6e); /* ABORT switch */
348 return IRQ_HANDLED;
349 }
350
mvme16x_timer_int(int irq,void * dev_id)351 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
352 {
353 irq_handler_t timer_routine = dev_id;
354 unsigned long flags;
355
356 local_irq_save(flags);
357 *(volatile unsigned char *)0xfff4201b |= 8;
358 timer_routine(0, NULL);
359 local_irq_restore(flags);
360
361 return IRQ_HANDLED;
362 }
363
mvme16x_sched_init(irq_handler_t timer_routine)364 void mvme16x_sched_init (irq_handler_t timer_routine)
365 {
366 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
367 int irq;
368
369 /* Using PCCchip2 or MC2 chip tick timer 1 */
370 *(volatile unsigned long *)0xfff42008 = 0;
371 *(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
372 *(volatile unsigned char *)0xfff42017 |= 3;
373 *(volatile unsigned char *)0xfff4201b = 0x16;
374 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0, "timer",
375 timer_routine))
376 panic ("Couldn't register timer int");
377
378 if (brdno == 0x0162 || brdno == 0x172)
379 irq = MVME162_IRQ_ABORT;
380 else
381 irq = MVME167_IRQ_ABORT;
382 if (request_irq(irq, mvme16x_abort_int, 0,
383 "abort", mvme16x_abort_int))
384 panic ("Couldn't register abort int");
385 }
386
387
388 /* This is always executed with interrupts disabled. */
mvme16x_gettimeoffset(void)389 u32 mvme16x_gettimeoffset(void)
390 {
391 return (*(volatile u32 *)0xfff42008) * 1000;
392 }
393
bcd2int(unsigned char b)394 int bcd2int (unsigned char b)
395 {
396 return ((b>>4)*10 + (b&15));
397 }
398
mvme16x_hwclk(int op,struct rtc_time * t)399 int mvme16x_hwclk(int op, struct rtc_time *t)
400 {
401 #warning check me!
402 if (!op) {
403 rtc->ctrl = RTC_READ;
404 t->tm_year = bcd2int (rtc->bcd_year);
405 t->tm_mon = bcd2int (rtc->bcd_mth);
406 t->tm_mday = bcd2int (rtc->bcd_dom);
407 t->tm_hour = bcd2int (rtc->bcd_hr);
408 t->tm_min = bcd2int (rtc->bcd_min);
409 t->tm_sec = bcd2int (rtc->bcd_sec);
410 rtc->ctrl = 0;
411 }
412 return 0;
413 }
414
mvme16x_set_clock_mmss(unsigned long nowtime)415 int mvme16x_set_clock_mmss (unsigned long nowtime)
416 {
417 return 0;
418 }
419
420