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