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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/m68k/amiga/config.c
..
..
@@ -17,6 +17,7 @@
17
17
 #include <linux/mm.h>
18
18
 #include <linux/seq_file.h>
19
19
 #include <linux/tty.h>
20
+#include <linux/clocksource.h>
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21
 #include <linux/console.h>
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22
 #include <linux/rtc.h>
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 #include <linux/init.h>
..
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@@ -31,7 +32,6 @@
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 #include <asm/bootinfo-amiga.h>
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 #include <asm/byteorder.h>
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 #include <asm/setup.h>
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-#include <asm/pgtable.h>
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 #include <asm/amigahw.h>
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 #include <asm/amigaints.h>
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37
 #include <asm/irq.h>
..
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@@ -95,8 +95,6 @@
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 static void amiga_sched_init(irq_handler_t handler);
96
96
 static void amiga_get_model(char *model);
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 static void amiga_get_hardware_list(struct seq_file *m);
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-/* amiga specific timer functions */
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-static u32 amiga_gettimeoffset(void);
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98
 extern void amiga_mksound(unsigned int count, unsigned int ticks);
101
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 static void amiga_reset(void);
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100
 extern void amiga_init_sound(void);
..
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@@ -216,100 +214,45 @@
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214
 
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 	switch (amiga_model) {
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 	case AMI_UNKNOWN:
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-		goto Generic;
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+		break;
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218
 
221
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 	case AMI_600:
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220
 	case AMI_1200:
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 		AMIGAHW_SET(A1200_IDE);
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 		AMIGAHW_SET(PCMCIA);
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+		fallthrough;
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 	case AMI_500:
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 	case AMI_500PLUS:
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226
 	case AMI_1000:
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227
 	case AMI_2000:
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228
 	case AMI_2500:
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229
 		AMIGAHW_SET(A2000_CLK);	/* Is this correct for all models? */
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-		goto Generic;
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+		break;
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231
 
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 	case AMI_3000:
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 	case AMI_3000T:
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 		AMIGAHW_SET(AMBER_FF);
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 		AMIGAHW_SET(MAGIC_REKICK);
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-		/* fall through */
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+		fallthrough;
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 	case AMI_3000PLUS:
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 		AMIGAHW_SET(A3000_SCSI);
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 		AMIGAHW_SET(A3000_CLK);
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 		AMIGAHW_SET(ZORRO3);
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-		goto Generic;
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+		break;
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242
 
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 	case AMI_4000T:
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 		AMIGAHW_SET(A4000_SCSI);
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-		/* fall through */
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+		fallthrough;
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246
 	case AMI_4000:
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 		AMIGAHW_SET(A4000_IDE);
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 		AMIGAHW_SET(A3000_CLK);
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 		AMIGAHW_SET(ZORRO3);
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-		goto Generic;
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+		break;
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251
 
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 	case AMI_CDTV:
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253
 	case AMI_CD32:
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 		AMIGAHW_SET(CD_ROM);
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255
 		AMIGAHW_SET(A2000_CLK);             /* Is this correct? */
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-		goto Generic;
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-
259
-	Generic:
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-		AMIGAHW_SET(AMI_VIDEO);
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-		AMIGAHW_SET(AMI_BLITTER);
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-		AMIGAHW_SET(AMI_AUDIO);
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-		AMIGAHW_SET(AMI_FLOPPY);
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-		AMIGAHW_SET(AMI_KEYBOARD);
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-		AMIGAHW_SET(AMI_MOUSE);
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-		AMIGAHW_SET(AMI_SERIAL);
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-		AMIGAHW_SET(AMI_PARALLEL);
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-		AMIGAHW_SET(CHIP_RAM);
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-		AMIGAHW_SET(PAULA);
270
-
271
-		switch (amiga_chipset) {
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-		case CS_OCS:
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-		case CS_ECS:
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-		case CS_AGA:
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-			switch (amiga_custom.deniseid & 0xf) {
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-			case 0x0c:
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-				AMIGAHW_SET(DENISE_HR);
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-				break;
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-			case 0x08:
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-				AMIGAHW_SET(LISA);
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-				break;
282
-			}
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-			break;
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-		default:
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-			AMIGAHW_SET(DENISE);
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-			break;
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-		}
288
-		switch ((amiga_custom.vposr>>8) & 0x7f) {
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-		case 0x00:
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-			AMIGAHW_SET(AGNUS_PAL);
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-			break;
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-		case 0x10:
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-			AMIGAHW_SET(AGNUS_NTSC);
294
-			break;
295
-		case 0x20:
296
-		case 0x21:
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-			AMIGAHW_SET(AGNUS_HR_PAL);
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-			break;
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-		case 0x30:
300
-		case 0x31:
301
-			AMIGAHW_SET(AGNUS_HR_NTSC);
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-			break;
303
-		case 0x22:
304
-		case 0x23:
305
-			AMIGAHW_SET(ALICE_PAL);
306
-			break;
307
-		case 0x32:
308
-		case 0x33:
309
-			AMIGAHW_SET(ALICE_NTSC);
310
-			break;
311
-		}
312
-		AMIGAHW_SET(ZORRO);
313
256
 		break;
314
257
 
315
258
 	case AMI_DRACO:
..
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@@ -318,6 +261,60 @@
318
261
 	default:
319
262
 		panic("Unknown Amiga Model");
320
263
 	}
264
+
265
+	AMIGAHW_SET(AMI_VIDEO);
266
+	AMIGAHW_SET(AMI_BLITTER);
267
+	AMIGAHW_SET(AMI_AUDIO);
268
+	AMIGAHW_SET(AMI_FLOPPY);
269
+	AMIGAHW_SET(AMI_KEYBOARD);
270
+	AMIGAHW_SET(AMI_MOUSE);
271
+	AMIGAHW_SET(AMI_SERIAL);
272
+	AMIGAHW_SET(AMI_PARALLEL);
273
+	AMIGAHW_SET(CHIP_RAM);
274
+	AMIGAHW_SET(PAULA);
275
+
276
+	switch (amiga_chipset) {
277
+	case CS_OCS:
278
+	case CS_ECS:
279
+	case CS_AGA:
280
+		switch (amiga_custom.deniseid & 0xf) {
281
+		case 0x0c:
282
+			AMIGAHW_SET(DENISE_HR);
283
+			break;
284
+		case 0x08:
285
+			AMIGAHW_SET(LISA);
286
+			break;
287
+		default:
288
+			AMIGAHW_SET(DENISE);
289
+			break;
290
+		}
291
+		break;
292
+	}
293
+	switch ((amiga_custom.vposr>>8) & 0x7f) {
294
+	case 0x00:
295
+		AMIGAHW_SET(AGNUS_PAL);
296
+		break;
297
+	case 0x10:
298
+		AMIGAHW_SET(AGNUS_NTSC);
299
+		break;
300
+	case 0x20:
301
+	case 0x21:
302
+		AMIGAHW_SET(AGNUS_HR_PAL);
303
+		break;
304
+	case 0x30:
305
+	case 0x31:
306
+		AMIGAHW_SET(AGNUS_HR_NTSC);
307
+		break;
308
+	case 0x22:
309
+	case 0x23:
310
+		AMIGAHW_SET(ALICE_PAL);
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+		break;
312
+	case 0x32:
313
+	case 0x33:
314
+		AMIGAHW_SET(ALICE_NTSC);
315
+		break;
316
+	}
317
+	AMIGAHW_SET(ZORRO);
321
318
 
322
319
 #define AMIGAHW_ANNOUNCE(name, str)		\
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320
 	if (AMIGAHW_PRESENT(name))		\
..
..
@@ -386,7 +383,6 @@
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 	mach_init_IRQ        = amiga_init_IRQ;
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384
 	mach_get_model       = amiga_get_model;
388
385
 	mach_get_hardware_list = amiga_get_hardware_list;
389
-	arch_gettimeoffset   = amiga_gettimeoffset;
390
386
 
391
387
 	/*
392
388
 	 * default MAX_DMA=0xffffffff on all machines. If we don't do so, the SCSI
..
..
@@ -464,7 +460,29 @@
464
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 		*(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
465
461
 }
466
462
 
463
+static u64 amiga_read_clk(struct clocksource *cs);
464
+
465
+static struct clocksource amiga_clk = {
466
+	.name   = "ciab",
467
+	.rating = 250,
468
+	.read   = amiga_read_clk,
469
+	.mask   = CLOCKSOURCE_MASK(32),
470
+	.flags  = CLOCK_SOURCE_IS_CONTINUOUS,
471
+};
472
+
467
473
 static unsigned short jiffy_ticks;
474
+static u32 clk_total, clk_offset;
475
+
476
+static irqreturn_t ciab_timer_handler(int irq, void *dev_id)
477
+{
478
+	irq_handler_t timer_routine = dev_id;
479
+
480
+	clk_total += jiffy_ticks;
481
+	clk_offset = 0;
482
+	timer_routine(0, NULL);
483
+
484
+	return IRQ_HANDLED;
485
+}
468
486
 
469
487
 static void __init amiga_sched_init(irq_handler_t timer_routine)
470
488
 {
..
..
@@ -484,19 +502,22 @@
484
502
 	 * Please don't change this to use ciaa, as it interferes with the
485
503
 	 * SCSI code. We'll have to take a look at this later
486
504
 	 */
487
-	if (request_irq(IRQ_AMIGA_CIAB_TA, timer_routine, 0, "timer", NULL))
505
+	if (request_irq(IRQ_AMIGA_CIAB_TA, ciab_timer_handler, IRQF_TIMER,
506
+			"timer", timer_routine))
488
507
 		pr_err("Couldn't register timer interrupt\n");
489
508
 	/* start timer */
490
509
 	ciab.cra |= 0x11;
510
+
511
+	clocksource_register_hz(&amiga_clk, amiga_eclock);
491
512
 }
492
513
 
493
-#define TICK_SIZE 10000
494
-
495
-/* This is always executed with interrupts disabled.  */
496
-static u32 amiga_gettimeoffset(void)
514
+static u64 amiga_read_clk(struct clocksource *cs)
497
515
 {
498
516
 	unsigned short hi, lo, hi2;
499
-	u32 ticks, offset = 0;
517
+	unsigned long flags;
518
+	u32 ticks;
519
+
520
+	local_irq_save(flags);
500
521
 
501
522
 	/* read CIA B timer A current value */
502
523
 	hi  = ciab.tahi;
..
..
@@ -513,12 +534,14 @@
513
534
 	if (ticks > jiffy_ticks / 2)
514
535
 		/* check for pending interrupt */
515
536
 		if (cia_set_irq(&ciab_base, 0) & CIA_ICR_TA)
516
-			offset = 10000;
537
+			clk_offset = jiffy_ticks;
517
538
 
518
539
 	ticks = jiffy_ticks - ticks;
519
-	ticks = (10000 * ticks) / jiffy_ticks;
540
+	ticks += clk_offset + clk_total;
520
541
 
521
-	return (ticks + offset) * 1000;
542
+	local_irq_restore(flags);
543
+
544
+	return ticks;
522
545
 }
523
546
 
524
547
 static void amiga_reset(void)  __noreturn;
..
..
@@ -603,7 +626,7 @@
603
626
 	unsigned long magic2;		/* SAVEKMSG_MAGIC2 */
604
627
 	unsigned long magicptr;		/* address of magic1 */
605
628
 	unsigned long size;
606
-	char data[0];
629
+	char data[];
607
630
 };
608
631
 
609
632
 static struct savekmsg *savekmsg;