xref: /openbmc/linux/arch/m68k/amiga/config.c (revision 8d04ddba)
1 /*
2  *  linux/arch/m68k/amiga/config.c
3  *
4  *  Copyright (C) 1993 Hamish Macdonald
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License.  See the file COPYING in the main directory of this archive
8  * for more details.
9  */
10 
11 /*
12  * Miscellaneous Amiga stuff
13  */
14 
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/mm.h>
18 #include <linux/seq_file.h>
19 #include <linux/tty.h>
20 #include <linux/clocksource.h>
21 #include <linux/console.h>
22 #include <linux/rtc.h>
23 #include <linux/init.h>
24 #include <linux/vt_kern.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/zorro.h>
28 #include <linux/module.h>
29 #include <linux/keyboard.h>
30 
31 #include <asm/bootinfo.h>
32 #include <asm/bootinfo-amiga.h>
33 #include <asm/byteorder.h>
34 #include <asm/setup.h>
35 #include <asm/amigahw.h>
36 #include <asm/amigaints.h>
37 #include <asm/irq.h>
38 #include <asm/machdep.h>
39 #include <asm/io.h>
40 #include <asm/config.h>
41 
42 static unsigned long amiga_model;
43 
44 unsigned long amiga_eclock;
45 EXPORT_SYMBOL(amiga_eclock);
46 
47 unsigned long amiga_colorclock;
48 EXPORT_SYMBOL(amiga_colorclock);
49 
50 unsigned long amiga_chipset;
51 EXPORT_SYMBOL(amiga_chipset);
52 
53 unsigned char amiga_vblank;
54 EXPORT_SYMBOL(amiga_vblank);
55 
56 static unsigned char amiga_psfreq;
57 
58 struct amiga_hw_present amiga_hw_present;
59 EXPORT_SYMBOL(amiga_hw_present);
60 
61 static char s_a500[] __initdata = "A500";
62 static char s_a500p[] __initdata = "A500+";
63 static char s_a600[] __initdata = "A600";
64 static char s_a1000[] __initdata = "A1000";
65 static char s_a1200[] __initdata = "A1200";
66 static char s_a2000[] __initdata = "A2000";
67 static char s_a2500[] __initdata = "A2500";
68 static char s_a3000[] __initdata = "A3000";
69 static char s_a3000t[] __initdata = "A3000T";
70 static char s_a3000p[] __initdata = "A3000+";
71 static char s_a4000[] __initdata = "A4000";
72 static char s_a4000t[] __initdata = "A4000T";
73 static char s_cdtv[] __initdata = "CDTV";
74 static char s_cd32[] __initdata = "CD32";
75 static char s_draco[] __initdata = "Draco";
76 static char *amiga_models[] __initdata = {
77 	[AMI_500-AMI_500]	= s_a500,
78 	[AMI_500PLUS-AMI_500]	= s_a500p,
79 	[AMI_600-AMI_500]	= s_a600,
80 	[AMI_1000-AMI_500]	= s_a1000,
81 	[AMI_1200-AMI_500]	= s_a1200,
82 	[AMI_2000-AMI_500]	= s_a2000,
83 	[AMI_2500-AMI_500]	= s_a2500,
84 	[AMI_3000-AMI_500]	= s_a3000,
85 	[AMI_3000T-AMI_500]	= s_a3000t,
86 	[AMI_3000PLUS-AMI_500]	= s_a3000p,
87 	[AMI_4000-AMI_500]	= s_a4000,
88 	[AMI_4000T-AMI_500]	= s_a4000t,
89 	[AMI_CDTV-AMI_500]	= s_cdtv,
90 	[AMI_CD32-AMI_500]	= s_cd32,
91 	[AMI_DRACO-AMI_500]	= s_draco,
92 };
93 
94 static char amiga_model_name[13] = "Amiga ";
95 
96 static void amiga_sched_init(void);
97 static void amiga_get_model(char *model);
98 static void amiga_get_hardware_list(struct seq_file *m);
99 extern void amiga_mksound(unsigned int count, unsigned int ticks);
100 static void amiga_reset(void);
101 extern void amiga_init_sound(void);
102 static void amiga_mem_console_write(struct console *co, const char *b,
103 				    unsigned int count);
104 #ifdef CONFIG_HEARTBEAT
105 static void amiga_heartbeat(int on);
106 #endif
107 
108 static struct console amiga_console_driver = {
109 	.name	= "debug",
110 	.flags	= CON_PRINTBUFFER,
111 	.index	= -1,
112 };
113 
114 
115     /*
116      *  Motherboard Resources present in all Amiga models
117      */
118 
119 static struct {
120 	struct resource _ciab, _ciaa, _custom, _kickstart;
121 } mb_resources = {
122 	._ciab = {
123 		.name = "CIA B", .start = 0x00bfd000, .end = 0x00bfdfff
124 	},
125 	._ciaa = {
126 		.name = "CIA A", .start = 0x00bfe000, .end = 0x00bfefff
127 	},
128 	._custom = {
129 		.name = "Custom I/O", .start = 0x00dff000, .end = 0x00dfffff
130 	},
131 	._kickstart = {
132 		.name = "Kickstart ROM", .start = 0x00f80000, .end = 0x00ffffff
133 	}
134 };
135 
136 static struct resource ram_resource[NUM_MEMINFO];
137 
138 
139     /*
140      *  Parse an Amiga-specific record in the bootinfo
141      */
142 
amiga_parse_bootinfo(const struct bi_record * record)143 int __init amiga_parse_bootinfo(const struct bi_record *record)
144 {
145 	int unknown = 0;
146 	const void *data = record->data;
147 
148 	switch (be16_to_cpu(record->tag)) {
149 	case BI_AMIGA_MODEL:
150 		amiga_model = be32_to_cpup(data);
151 		break;
152 
153 	case BI_AMIGA_ECLOCK:
154 		amiga_eclock = be32_to_cpup(data);
155 		break;
156 
157 	case BI_AMIGA_CHIPSET:
158 		amiga_chipset = be32_to_cpup(data);
159 		break;
160 
161 	case BI_AMIGA_CHIP_SIZE:
162 		amiga_chip_size = be32_to_cpup(data);
163 		break;
164 
165 	case BI_AMIGA_VBLANK:
166 		amiga_vblank = *(const __u8 *)data;
167 		break;
168 
169 	case BI_AMIGA_PSFREQ:
170 		amiga_psfreq = *(const __u8 *)data;
171 		break;
172 
173 	case BI_AMIGA_AUTOCON:
174 #ifdef CONFIG_ZORRO
175 		if (zorro_num_autocon < ZORRO_NUM_AUTO) {
176 			const struct ConfigDev *cd = data;
177 			struct zorro_dev_init *dev = &zorro_autocon_init[zorro_num_autocon++];
178 			dev->rom = cd->cd_Rom;
179 			dev->slotaddr = be16_to_cpu(cd->cd_SlotAddr);
180 			dev->slotsize = be16_to_cpu(cd->cd_SlotSize);
181 			dev->boardaddr = be32_to_cpu(cd->cd_BoardAddr);
182 			dev->boardsize = be32_to_cpu(cd->cd_BoardSize);
183 
184 			/* CS-LAB Warp 1260 workaround */
185 			if (be16_to_cpu(dev->rom.er_Manufacturer) == ZORRO_MANUF(ZORRO_PROD_CSLAB_WARP_1260) &&
186 			    dev->rom.er_Product == ZORRO_PROD(ZORRO_PROD_CSLAB_WARP_1260)) {
187 
188 				/* turn off all interrupts */
189 				pr_info("Warp 1260 card detected: applying interrupt storm workaround\n");
190 				*(uint32_t *)(dev->boardaddr + 0x1000) = 0xfff;
191 			}
192 		} else
193 			pr_warn("amiga_parse_bootinfo: too many AutoConfig devices\n");
194 #endif /* CONFIG_ZORRO */
195 		break;
196 
197 	case BI_AMIGA_SERPER:
198 		/* serial port period: ignored here */
199 		break;
200 
201 	default:
202 		unknown = 1;
203 	}
204 	return unknown;
205 }
206 
207     /*
208      *  Identify builtin hardware
209      */
210 
amiga_identify(void)211 static void __init amiga_identify(void)
212 {
213 	/* Fill in some default values, if necessary */
214 	if (amiga_eclock == 0)
215 		amiga_eclock = 709379;
216 
217 	memset(&amiga_hw_present, 0, sizeof(amiga_hw_present));
218 
219 	pr_info("Amiga hardware found: ");
220 	if (amiga_model >= AMI_500 && amiga_model <= AMI_DRACO) {
221 		pr_cont("[%s] ", amiga_models[amiga_model-AMI_500]);
222 		strcat(amiga_model_name, amiga_models[amiga_model-AMI_500]);
223 	}
224 
225 	switch (amiga_model) {
226 	case AMI_UNKNOWN:
227 		break;
228 
229 	case AMI_600:
230 	case AMI_1200:
231 		AMIGAHW_SET(A1200_IDE);
232 		AMIGAHW_SET(PCMCIA);
233 		fallthrough;
234 	case AMI_500:
235 	case AMI_500PLUS:
236 	case AMI_1000:
237 	case AMI_2000:
238 	case AMI_2500:
239 		AMIGAHW_SET(A2000_CLK);	/* Is this correct for all models? */
240 		break;
241 
242 	case AMI_3000:
243 	case AMI_3000T:
244 		AMIGAHW_SET(AMBER_FF);
245 		AMIGAHW_SET(MAGIC_REKICK);
246 		fallthrough;
247 	case AMI_3000PLUS:
248 		AMIGAHW_SET(A3000_SCSI);
249 		AMIGAHW_SET(A3000_CLK);
250 		AMIGAHW_SET(ZORRO3);
251 		break;
252 
253 	case AMI_4000T:
254 		AMIGAHW_SET(A4000_SCSI);
255 		fallthrough;
256 	case AMI_4000:
257 		AMIGAHW_SET(A4000_IDE);
258 		AMIGAHW_SET(A3000_CLK);
259 		AMIGAHW_SET(ZORRO3);
260 		break;
261 
262 	case AMI_CDTV:
263 	case AMI_CD32:
264 		AMIGAHW_SET(CD_ROM);
265 		AMIGAHW_SET(A2000_CLK);             /* Is this correct? */
266 		break;
267 
268 	case AMI_DRACO:
269 		panic("No support for Draco yet");
270 
271 	default:
272 		panic("Unknown Amiga Model");
273 	}
274 
275 	AMIGAHW_SET(AMI_VIDEO);
276 	AMIGAHW_SET(AMI_BLITTER);
277 	AMIGAHW_SET(AMI_AUDIO);
278 	AMIGAHW_SET(AMI_FLOPPY);
279 	AMIGAHW_SET(AMI_KEYBOARD);
280 	AMIGAHW_SET(AMI_MOUSE);
281 	AMIGAHW_SET(AMI_SERIAL);
282 	AMIGAHW_SET(AMI_PARALLEL);
283 	AMIGAHW_SET(CHIP_RAM);
284 	AMIGAHW_SET(PAULA);
285 
286 	switch (amiga_chipset) {
287 	case CS_OCS:
288 	case CS_ECS:
289 	case CS_AGA:
290 		switch (amiga_custom.deniseid & 0xf) {
291 		case 0x0c:
292 			AMIGAHW_SET(DENISE_HR);
293 			break;
294 		case 0x08:
295 			AMIGAHW_SET(LISA);
296 			break;
297 		default:
298 			AMIGAHW_SET(DENISE);
299 			break;
300 		}
301 		break;
302 	}
303 	switch ((amiga_custom.vposr>>8) & 0x7f) {
304 	case 0x00:
305 		AMIGAHW_SET(AGNUS_PAL);
306 		break;
307 	case 0x10:
308 		AMIGAHW_SET(AGNUS_NTSC);
309 		break;
310 	case 0x20:
311 	case 0x21:
312 		AMIGAHW_SET(AGNUS_HR_PAL);
313 		break;
314 	case 0x30:
315 	case 0x31:
316 		AMIGAHW_SET(AGNUS_HR_NTSC);
317 		break;
318 	case 0x22:
319 	case 0x23:
320 		AMIGAHW_SET(ALICE_PAL);
321 		break;
322 	case 0x32:
323 	case 0x33:
324 		AMIGAHW_SET(ALICE_NTSC);
325 		break;
326 	}
327 	AMIGAHW_SET(ZORRO);
328 
329 #define AMIGAHW_ANNOUNCE(name, str)		\
330 	if (AMIGAHW_PRESENT(name))		\
331 		pr_cont(str)
332 
333 	AMIGAHW_ANNOUNCE(AMI_VIDEO, "VIDEO ");
334 	AMIGAHW_ANNOUNCE(AMI_BLITTER, "BLITTER ");
335 	AMIGAHW_ANNOUNCE(AMBER_FF, "AMBER_FF ");
336 	AMIGAHW_ANNOUNCE(AMI_AUDIO, "AUDIO ");
337 	AMIGAHW_ANNOUNCE(AMI_FLOPPY, "FLOPPY ");
338 	AMIGAHW_ANNOUNCE(A3000_SCSI, "A3000_SCSI ");
339 	AMIGAHW_ANNOUNCE(A4000_SCSI, "A4000_SCSI ");
340 	AMIGAHW_ANNOUNCE(A1200_IDE, "A1200_IDE ");
341 	AMIGAHW_ANNOUNCE(A4000_IDE, "A4000_IDE ");
342 	AMIGAHW_ANNOUNCE(CD_ROM, "CD_ROM ");
343 	AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "KEYBOARD ");
344 	AMIGAHW_ANNOUNCE(AMI_MOUSE, "MOUSE ");
345 	AMIGAHW_ANNOUNCE(AMI_SERIAL, "SERIAL ");
346 	AMIGAHW_ANNOUNCE(AMI_PARALLEL, "PARALLEL ");
347 	AMIGAHW_ANNOUNCE(A2000_CLK, "A2000_CLK ");
348 	AMIGAHW_ANNOUNCE(A3000_CLK, "A3000_CLK ");
349 	AMIGAHW_ANNOUNCE(CHIP_RAM, "CHIP_RAM ");
350 	AMIGAHW_ANNOUNCE(PAULA, "PAULA ");
351 	AMIGAHW_ANNOUNCE(DENISE, "DENISE ");
352 	AMIGAHW_ANNOUNCE(DENISE_HR, "DENISE_HR ");
353 	AMIGAHW_ANNOUNCE(LISA, "LISA ");
354 	AMIGAHW_ANNOUNCE(AGNUS_PAL, "AGNUS_PAL ");
355 	AMIGAHW_ANNOUNCE(AGNUS_NTSC, "AGNUS_NTSC ");
356 	AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "AGNUS_HR_PAL ");
357 	AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "AGNUS_HR_NTSC ");
358 	AMIGAHW_ANNOUNCE(ALICE_PAL, "ALICE_PAL ");
359 	AMIGAHW_ANNOUNCE(ALICE_NTSC, "ALICE_NTSC ");
360 	AMIGAHW_ANNOUNCE(MAGIC_REKICK, "MAGIC_REKICK ");
361 	AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA ");
362 	if (AMIGAHW_PRESENT(ZORRO))
363 		pr_cont("ZORRO%s ", AMIGAHW_PRESENT(ZORRO3) ? "3" : "");
364 	pr_cont("\n");
365 
366 #undef AMIGAHW_ANNOUNCE
367 }
368 
369 
amiga_random_get_entropy(void)370 static unsigned long amiga_random_get_entropy(void)
371 {
372 	/* VPOSR/VHPOSR provide at least 17 bits of data changing at 1.79 MHz */
373 	return *(unsigned long *)&amiga_custom.vposr;
374 }
375 
376 
377     /*
378      *  Setup the Amiga configuration info
379      */
380 
config_amiga(void)381 void __init config_amiga(void)
382 {
383 	int i;
384 
385 	amiga_identify();
386 
387 	/* Yuk, we don't have PCI memory */
388 	iomem_resource.name = "Memory";
389 	for (i = 0; i < 4; i++)
390 		request_resource(&iomem_resource, &((struct resource *)&mb_resources)[i]);
391 
392 	mach_sched_init      = amiga_sched_init;
393 	mach_init_IRQ        = amiga_init_IRQ;
394 	mach_get_model       = amiga_get_model;
395 	mach_get_hardware_list = amiga_get_hardware_list;
396 	mach_reset           = amiga_reset;
397 #if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
398 	mach_beep            = amiga_mksound;
399 #endif
400 
401 #ifdef CONFIG_HEARTBEAT
402 	mach_heartbeat = amiga_heartbeat;
403 #endif
404 
405 	mach_random_get_entropy = amiga_random_get_entropy;
406 
407 	/* Fill in the clock value (based on the 700 kHz E-Clock) */
408 	amiga_colorclock = 5*amiga_eclock;	/* 3.5 MHz */
409 
410 	/* clear all DMA bits */
411 	amiga_custom.dmacon = DMAF_ALL;
412 	/* ensure that the DMA master bit is set */
413 	amiga_custom.dmacon = DMAF_SETCLR | DMAF_MASTER;
414 
415 	/* don't use Z2 RAM as system memory on Z3 capable machines */
416 	if (AMIGAHW_PRESENT(ZORRO3)) {
417 		int i, j;
418 		u32 disabled_z2mem = 0;
419 
420 		for (i = 0; i < m68k_num_memory; i++) {
421 			if (m68k_memory[i].addr < 16*1024*1024) {
422 				if (i == 0) {
423 					/* don't cut off the branch we're sitting on */
424 					pr_warn("Warning: kernel runs in Zorro II memory\n");
425 					continue;
426 				}
427 				disabled_z2mem += m68k_memory[i].size;
428 				m68k_num_memory--;
429 				for (j = i; j < m68k_num_memory; j++)
430 					m68k_memory[j] = m68k_memory[j+1];
431 				i--;
432 			}
433 		}
434 		if (disabled_z2mem)
435 			pr_info("%dK of Zorro II memory will not be used as system memory\n",
436 				disabled_z2mem>>10);
437 	}
438 
439 	/* request all RAM */
440 	for (i = 0; i < m68k_num_memory; i++) {
441 		ram_resource[i].name =
442 			(m68k_memory[i].addr >= 0x01000000) ? "32-bit Fast RAM" :
443 			(m68k_memory[i].addr < 0x00c00000) ? "16-bit Fast RAM" :
444 			"16-bit Slow RAM";
445 		ram_resource[i].start = m68k_memory[i].addr;
446 		ram_resource[i].end = m68k_memory[i].addr+m68k_memory[i].size-1;
447 		request_resource(&iomem_resource, &ram_resource[i]);
448 	}
449 
450 	/* initialize chipram allocator */
451 	amiga_chip_init();
452 
453 	/* our beloved beeper */
454 	if (AMIGAHW_PRESENT(AMI_AUDIO))
455 		amiga_init_sound();
456 
457 	/*
458 	 * if it is an A3000, set the magic bit that forces
459 	 * a hard rekick
460 	 */
461 	if (AMIGAHW_PRESENT(MAGIC_REKICK))
462 		*(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
463 }
464 
465 static u64 amiga_read_clk(struct clocksource *cs);
466 
467 static struct clocksource amiga_clk = {
468 	.name   = "ciab",
469 	.rating = 250,
470 	.read   = amiga_read_clk,
471 	.mask   = CLOCKSOURCE_MASK(32),
472 	.flags  = CLOCK_SOURCE_IS_CONTINUOUS,
473 };
474 
475 static unsigned short jiffy_ticks;
476 static u32 clk_total, clk_offset;
477 
ciab_timer_handler(int irq,void * dev_id)478 static irqreturn_t ciab_timer_handler(int irq, void *dev_id)
479 {
480 	clk_total += jiffy_ticks;
481 	clk_offset = 0;
482 	legacy_timer_tick(1);
483 	timer_heartbeat();
484 
485 	return IRQ_HANDLED;
486 }
487 
amiga_sched_init(void)488 static void __init amiga_sched_init(void)
489 {
490 	static struct resource sched_res = {
491 		.name = "timer", .start = 0x00bfd400, .end = 0x00bfd5ff,
492 	};
493 	jiffy_ticks = DIV_ROUND_CLOSEST(amiga_eclock, HZ);
494 
495 	if (request_resource(&mb_resources._ciab, &sched_res))
496 		pr_warn("Cannot allocate ciab.ta{lo,hi}\n");
497 	ciab.cra &= 0xC0;   /* turn off timer A, continuous mode, from Eclk */
498 	ciab.talo = jiffy_ticks % 256;
499 	ciab.tahi = jiffy_ticks / 256;
500 
501 	/* install interrupt service routine for CIAB Timer A
502 	 *
503 	 * Please don't change this to use ciaa, as it interferes with the
504 	 * SCSI code. We'll have to take a look at this later
505 	 */
506 	if (request_irq(IRQ_AMIGA_CIAB_TA, ciab_timer_handler, IRQF_TIMER,
507 			"timer", NULL))
508 		pr_err("Couldn't register timer interrupt\n");
509 	/* start timer */
510 	ciab.cra |= 0x11;
511 
512 	clocksource_register_hz(&amiga_clk, amiga_eclock);
513 }
514 
amiga_read_clk(struct clocksource * cs)515 static u64 amiga_read_clk(struct clocksource *cs)
516 {
517 	unsigned short hi, lo, hi2;
518 	unsigned long flags;
519 	u32 ticks;
520 
521 	local_irq_save(flags);
522 
523 	/* read CIA B timer A current value */
524 	hi  = ciab.tahi;
525 	lo  = ciab.talo;
526 	hi2 = ciab.tahi;
527 
528 	if (hi != hi2) {
529 		lo = ciab.talo;
530 		hi = hi2;
531 	}
532 
533 	ticks = hi << 8 | lo;
534 
535 	if (ticks > jiffy_ticks / 2)
536 		/* check for pending interrupt */
537 		if (cia_set_irq(&ciab_base, 0) & CIA_ICR_TA)
538 			clk_offset = jiffy_ticks;
539 
540 	ticks = jiffy_ticks - ticks;
541 	ticks += clk_offset + clk_total;
542 
543 	local_irq_restore(flags);
544 
545 	return ticks;
546 }
547 
548 static void amiga_reset(void)  __noreturn;
549 
amiga_reset(void)550 static void amiga_reset(void)
551 {
552 	unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
553 	unsigned long jmp_addr = virt_to_phys(&&jmp_addr_label);
554 
555 	local_irq_disable();
556 	if (CPU_IS_040_OR_060)
557 		/* Setup transparent translation registers for mapping
558 		 * of 16 MB kernel segment before disabling translation
559 		 */
560 		asm volatile ("\n"
561 			"	move.l	%0,%%d0\n"
562 			"	and.l	#0xff000000,%%d0\n"
563 			"	or.w	#0xe020,%%d0\n"   /* map 16 MB, enable, cacheable */
564 			"	.chip	68040\n"
565 			"	movec	%%d0,%%itt0\n"
566 			"	movec	%%d0,%%dtt0\n"
567 			"	.chip	68k\n"
568 			"	jmp	%0@\n"
569 			: /* no outputs */
570 			: "a" (jmp_addr040)
571 			: "d0");
572 	else
573 		/* for 680[23]0, just disable translation and jump to the physical
574 		 * address of the label
575 		 */
576 		asm volatile ("\n"
577 			"	pmove	%%tc,%@\n"
578 			"	bclr	#7,%@\n"
579 			"	pmove	%@,%%tc\n"
580 			"	jmp	%0@\n"
581 			: /* no outputs */
582 			: "a" (jmp_addr));
583 jmp_addr_label040:
584 	/* disable translation on '040 now */
585 	asm volatile ("\n"
586 		"	moveq	#0,%%d0\n"
587 		"	.chip	68040\n"
588 		"	movec	%%d0,%%tc\n"	/* disable MMU */
589 		"	.chip	68k\n"
590 		: /* no outputs */
591 		: /* no inputs */
592 		: "d0");
593 
594 	jmp_addr_label:
595 	/* pickup reset address from AmigaOS ROM, reset devices and jump
596 	 * to reset address
597 	 */
598 	asm volatile ("\n"
599 		"	move.w	#0x2700,%sr\n"
600 		"	lea	0x01000000,%a0\n"
601 		"	sub.l	%a0@(-0x14),%a0\n"
602 		"	move.l	%a0@(4),%a0\n"
603 		"	subq.l	#2,%a0\n"
604 		"	jra	1f\n"
605 		/* align on a longword boundary */
606 		"	" __ALIGN_STR "\n"
607 		"1:\n"
608 		"	reset\n"
609 		"	jmp   %a0@");
610 
611 	for (;;)
612 		;
613 }
614 
615 
616     /*
617      *  Debugging
618      */
619 
620 #define SAVEKMSG_MAXMEM		128*1024
621 
622 #define SAVEKMSG_MAGIC1		0x53415645	/* 'SAVE' */
623 #define SAVEKMSG_MAGIC2		0x4B4D5347	/* 'KMSG' */
624 
625 struct savekmsg {
626 	unsigned long magic1;		/* SAVEKMSG_MAGIC1 */
627 	unsigned long magic2;		/* SAVEKMSG_MAGIC2 */
628 	unsigned long magicptr;		/* address of magic1 */
629 	unsigned long size;
630 	char data[];
631 };
632 
633 static struct savekmsg *savekmsg;
634 
amiga_mem_console_write(struct console * co,const char * s,unsigned int count)635 static void amiga_mem_console_write(struct console *co, const char *s,
636 				    unsigned int count)
637 {
638 	if (savekmsg->size + count <= SAVEKMSG_MAXMEM-sizeof(struct savekmsg)) {
639 		memcpy(savekmsg->data + savekmsg->size, s, count);
640 		savekmsg->size += count;
641 	}
642 }
643 
amiga_savekmsg_setup(char * arg)644 static int __init amiga_savekmsg_setup(char *arg)
645 {
646 	bool registered;
647 
648 	if (!MACH_IS_AMIGA || strcmp(arg, "mem"))
649 		return 0;
650 
651 	if (amiga_chip_size < SAVEKMSG_MAXMEM) {
652 		pr_err("Not enough chipram for debugging\n");
653 		return -ENOMEM;
654 	}
655 
656 	/* Just steal the block, the chipram allocator isn't functional yet */
657 	amiga_chip_size -= SAVEKMSG_MAXMEM;
658 	savekmsg = ZTWO_VADDR(CHIP_PHYSADDR + amiga_chip_size);
659 	savekmsg->magic1 = SAVEKMSG_MAGIC1;
660 	savekmsg->magic2 = SAVEKMSG_MAGIC2;
661 	savekmsg->magicptr = ZTWO_PADDR(savekmsg);
662 	savekmsg->size = 0;
663 
664 	registered = !!amiga_console_driver.write;
665 	amiga_console_driver.write = amiga_mem_console_write;
666 	if (!registered)
667 		register_console(&amiga_console_driver);
668 	return 0;
669 }
670 
671 early_param("debug", amiga_savekmsg_setup);
672 
amiga_serial_putc(char c)673 static void amiga_serial_putc(char c)
674 {
675 	amiga_custom.serdat = (unsigned char)c | 0x100;
676 	while (!(amiga_custom.serdatr & 0x2000))
677 		;
678 }
679 
amiga_serial_console_write(struct console * co,const char * s,unsigned int count)680 static void amiga_serial_console_write(struct console *co, const char *s,
681 				       unsigned int count)
682 {
683 	while (count--) {
684 		if (*s == '\n')
685 			amiga_serial_putc('\r');
686 		amiga_serial_putc(*s++);
687 	}
688 }
689 
690 #if 0
691 void amiga_serial_puts(const char *s)
692 {
693 	amiga_serial_console_write(NULL, s, strlen(s));
694 }
695 
696 int amiga_serial_console_wait_key(struct console *co)
697 {
698 	int ch;
699 
700 	while (!(amiga_custom.intreqr & IF_RBF))
701 		barrier();
702 	ch = amiga_custom.serdatr & 0xff;
703 	/* clear the interrupt, so that another character can be read */
704 	amiga_custom.intreq = IF_RBF;
705 	return ch;
706 }
707 
708 void amiga_serial_gets(struct console *co, char *s, int len)
709 {
710 	int ch, cnt = 0;
711 
712 	while (1) {
713 		ch = amiga_serial_console_wait_key(co);
714 
715 		/* Check for backspace. */
716 		if (ch == 8 || ch == 127) {
717 			if (cnt == 0) {
718 				amiga_serial_putc('\007');
719 				continue;
720 			}
721 			cnt--;
722 			amiga_serial_puts("\010 \010");
723 			continue;
724 		}
725 
726 		/* Check for enter. */
727 		if (ch == 10 || ch == 13)
728 			break;
729 
730 		/* See if line is too long. */
731 		if (cnt >= len + 1) {
732 			amiga_serial_putc(7);
733 			cnt--;
734 			continue;
735 		}
736 
737 		/* Store and echo character. */
738 		s[cnt++] = ch;
739 		amiga_serial_putc(ch);
740 	}
741 	/* Print enter. */
742 	amiga_serial_puts("\r\n");
743 	s[cnt] = 0;
744 }
745 #endif
746 
amiga_debug_setup(char * arg)747 static int __init amiga_debug_setup(char *arg)
748 {
749 	bool registered;
750 
751 	if (!MACH_IS_AMIGA || strcmp(arg, "ser"))
752 		return 0;
753 
754 	/* no initialization required (?) */
755 	registered = !!amiga_console_driver.write;
756 	amiga_console_driver.write = amiga_serial_console_write;
757 	if (!registered)
758 		register_console(&amiga_console_driver);
759 	return 0;
760 }
761 
762 early_param("debug", amiga_debug_setup);
763 
764 #ifdef CONFIG_HEARTBEAT
amiga_heartbeat(int on)765 static void amiga_heartbeat(int on)
766 {
767 	if (on)
768 		ciaa.pra &= ~2;
769 	else
770 		ciaa.pra |= 2;
771 }
772 #endif
773 
774     /*
775      *  Amiga specific parts of /proc
776      */
777 
amiga_get_model(char * model)778 static void amiga_get_model(char *model)
779 {
780 	strcpy(model, amiga_model_name);
781 }
782 
783 
amiga_get_hardware_list(struct seq_file * m)784 static void amiga_get_hardware_list(struct seq_file *m)
785 {
786 	if (AMIGAHW_PRESENT(CHIP_RAM))
787 		seq_printf(m, "Chip RAM:\t%ldK\n", amiga_chip_size>>10);
788 	seq_printf(m, "PS Freq:\t%dHz\nEClock Freq:\t%ldHz\n",
789 			amiga_psfreq, amiga_eclock);
790 	if (AMIGAHW_PRESENT(AMI_VIDEO)) {
791 		char *type;
792 		switch (amiga_chipset) {
793 		case CS_OCS:
794 			type = "OCS";
795 			break;
796 		case CS_ECS:
797 			type = "ECS";
798 			break;
799 		case CS_AGA:
800 			type = "AGA";
801 			break;
802 		default:
803 			type = "Old or Unknown";
804 			break;
805 		}
806 		seq_printf(m, "Graphics:\t%s\n", type);
807 	}
808 
809 #define AMIGAHW_ANNOUNCE(name, str)			\
810 	if (AMIGAHW_PRESENT(name))			\
811 		seq_printf (m, "\t%s\n", str)
812 
813 	seq_puts(m, "Detected hardware:\n");
814 	AMIGAHW_ANNOUNCE(AMI_VIDEO, "Amiga Video");
815 	AMIGAHW_ANNOUNCE(AMI_BLITTER, "Blitter");
816 	AMIGAHW_ANNOUNCE(AMBER_FF, "Amber Flicker Fixer");
817 	AMIGAHW_ANNOUNCE(AMI_AUDIO, "Amiga Audio");
818 	AMIGAHW_ANNOUNCE(AMI_FLOPPY, "Floppy Controller");
819 	AMIGAHW_ANNOUNCE(A3000_SCSI, "SCSI Controller WD33C93 (A3000 style)");
820 	AMIGAHW_ANNOUNCE(A4000_SCSI, "SCSI Controller NCR53C710 (A4000T style)");
821 	AMIGAHW_ANNOUNCE(A1200_IDE, "IDE Interface (A1200 style)");
822 	AMIGAHW_ANNOUNCE(A4000_IDE, "IDE Interface (A4000 style)");
823 	AMIGAHW_ANNOUNCE(CD_ROM, "Internal CD ROM drive");
824 	AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "Keyboard");
825 	AMIGAHW_ANNOUNCE(AMI_MOUSE, "Mouse Port");
826 	AMIGAHW_ANNOUNCE(AMI_SERIAL, "Serial Port");
827 	AMIGAHW_ANNOUNCE(AMI_PARALLEL, "Parallel Port");
828 	AMIGAHW_ANNOUNCE(A2000_CLK, "Hardware Clock (A2000 style)");
829 	AMIGAHW_ANNOUNCE(A3000_CLK, "Hardware Clock (A3000 style)");
830 	AMIGAHW_ANNOUNCE(CHIP_RAM, "Chip RAM");
831 	AMIGAHW_ANNOUNCE(PAULA, "Paula 8364");
832 	AMIGAHW_ANNOUNCE(DENISE, "Denise 8362");
833 	AMIGAHW_ANNOUNCE(DENISE_HR, "Denise 8373");
834 	AMIGAHW_ANNOUNCE(LISA, "Lisa 8375");
835 	AMIGAHW_ANNOUNCE(AGNUS_PAL, "Normal/Fat PAL Agnus 8367/8371");
836 	AMIGAHW_ANNOUNCE(AGNUS_NTSC, "Normal/Fat NTSC Agnus 8361/8370");
837 	AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "Fat Hires PAL Agnus 8372");
838 	AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "Fat Hires NTSC Agnus 8372");
839 	AMIGAHW_ANNOUNCE(ALICE_PAL, "PAL Alice 8374");
840 	AMIGAHW_ANNOUNCE(ALICE_NTSC, "NTSC Alice 8374");
841 	AMIGAHW_ANNOUNCE(MAGIC_REKICK, "Magic Hard Rekick");
842 	AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA Slot");
843 #ifdef CONFIG_ZORRO
844 	if (AMIGAHW_PRESENT(ZORRO))
845 		seq_printf(m, "\tZorro II%s AutoConfig: %d Expansion "
846 				"Device%s\n",
847 				AMIGAHW_PRESENT(ZORRO3) ? "I" : "",
848 				zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
849 #endif /* CONFIG_ZORRO */
850 
851 #undef AMIGAHW_ANNOUNCE
852 }
853 
854 /*
855  * The Amiga keyboard driver needs key_maps, but we cannot export it in
856  * drivers/char/defkeymap.c, as it is autogenerated
857  */
858 #ifdef CONFIG_HW_CONSOLE
859 EXPORT_SYMBOL_GPL(key_maps);
860 #endif
861