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20#include <linux/types.h>
21#include <linux/kernel.h>
22#include <linux/init.h>
23#include <linux/list.h>
24#include <linux/platform_device.h>
25#include <linux/slab.h>
26#include <linux/string.h>
27#include <linux/syscore_ops.h>
28#include <linux/amba/bus.h>
29#include <linux/amba/kmi.h>
30#include <linux/clocksource.h>
31#include <linux/clockchips.h>
32#include <linux/interrupt.h>
33#include <linux/io.h>
34#include <linux/irqchip/versatile-fpga.h>
35#include <linux/mtd/physmap.h>
36#include <linux/clk.h>
37#include <linux/platform_data/clk-integrator.h>
38#include <linux/of_irq.h>
39#include <linux/of_address.h>
40#include <linux/of_platform.h>
41#include <linux/stat.h>
42#include <linux/sys_soc.h>
43#include <linux/termios.h>
44#include <video/vga.h>
45
46#include <mach/hardware.h>
47#include <mach/platform.h>
48#include <asm/hardware/arm_timer.h>
49#include <asm/setup.h>
50#include <asm/param.h>
51#include <asm/mach-types.h>
52#include <asm/sched_clock.h>
53
54#include <mach/lm.h>
55#include <mach/irqs.h>
56
57#include <asm/mach/arch.h>
58#include <asm/mach/irq.h>
59#include <asm/mach/map.h>
60#include <asm/mach/pci.h>
61#include <asm/mach/time.h>
62
63#include "common.h"
64
65
66void __iomem *ap_syscon_base;
67
68
69
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72
73
74
75#define VA_IC_BASE __io_address(INTEGRATOR_IC_BASE)
76#define VA_EBI_BASE __io_address(INTEGRATOR_EBI_BASE)
77#define VA_CMIC_BASE __io_address(INTEGRATOR_HDR_IC)
78
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96
97static struct map_desc ap_io_desc[] __initdata __maybe_unused = {
98 {
99 .virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE),
100 .pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE),
101 .length = SZ_4K,
102 .type = MT_DEVICE
103 }, {
104 .virtual = IO_ADDRESS(INTEGRATOR_EBI_BASE),
105 .pfn = __phys_to_pfn(INTEGRATOR_EBI_BASE),
106 .length = SZ_4K,
107 .type = MT_DEVICE
108 }, {
109 .virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
110 .pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
111 .length = SZ_4K,
112 .type = MT_DEVICE
113 }, {
114 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
115 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
116 .length = SZ_4K,
117 .type = MT_DEVICE
118 }, {
119 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
120 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
121 .length = SZ_4K,
122 .type = MT_DEVICE
123 }, {
124 .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
125 .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
126 .length = SZ_4K,
127 .type = MT_DEVICE
128 }, {
129 .virtual = IO_ADDRESS(INTEGRATOR_AP_GPIO_BASE),
130 .pfn = __phys_to_pfn(INTEGRATOR_AP_GPIO_BASE),
131 .length = SZ_4K,
132 .type = MT_DEVICE
133 }, {
134 .virtual = (unsigned long)PCI_MEMORY_VADDR,
135 .pfn = __phys_to_pfn(PHYS_PCI_MEM_BASE),
136 .length = SZ_16M,
137 .type = MT_DEVICE
138 }, {
139 .virtual = (unsigned long)PCI_CONFIG_VADDR,
140 .pfn = __phys_to_pfn(PHYS_PCI_CONFIG_BASE),
141 .length = SZ_16M,
142 .type = MT_DEVICE
143 }, {
144 .virtual = (unsigned long)PCI_V3_VADDR,
145 .pfn = __phys_to_pfn(PHYS_PCI_V3_BASE),
146 .length = SZ_64K,
147 .type = MT_DEVICE
148 }
149};
150
151static void __init ap_map_io(void)
152{
153 iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
154 vga_base = (unsigned long)PCI_MEMORY_VADDR;
155 pci_map_io_early(__phys_to_pfn(PHYS_PCI_IO_BASE));
156}
157
158#ifdef CONFIG_PM
159static unsigned long ic_irq_enable;
160
161static int irq_suspend(void)
162{
163 ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
164 return 0;
165}
166
167static void irq_resume(void)
168{
169
170 writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
171 writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
172 writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
173
174 writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
175}
176#else
177#define irq_suspend NULL
178#define irq_resume NULL
179#endif
180
181static struct syscore_ops irq_syscore_ops = {
182 .suspend = irq_suspend,
183 .resume = irq_resume,
184};
185
186static int __init irq_syscore_init(void)
187{
188 register_syscore_ops(&irq_syscore_ops);
189
190 return 0;
191}
192
193device_initcall(irq_syscore_init);
194
195
196
197
198#define EBI_CSR1 (VA_EBI_BASE + INTEGRATOR_EBI_CSR1_OFFSET)
199#define EBI_LOCK (VA_EBI_BASE + INTEGRATOR_EBI_LOCK_OFFSET)
200
201static int ap_flash_init(struct platform_device *dev)
202{
203 u32 tmp;
204
205 writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP,
206 ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
207
208 tmp = readl(EBI_CSR1) | INTEGRATOR_EBI_WRITE_ENABLE;
209 writel(tmp, EBI_CSR1);
210
211 if (!(readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE)) {
212 writel(0xa05f, EBI_LOCK);
213 writel(tmp, EBI_CSR1);
214 writel(0, EBI_LOCK);
215 }
216 return 0;
217}
218
219static void ap_flash_exit(struct platform_device *dev)
220{
221 u32 tmp;
222
223 writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP,
224 ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
225
226 tmp = readl(EBI_CSR1) & ~INTEGRATOR_EBI_WRITE_ENABLE;
227 writel(tmp, EBI_CSR1);
228
229 if (readl(EBI_CSR1) & INTEGRATOR_EBI_WRITE_ENABLE) {
230 writel(0xa05f, EBI_LOCK);
231 writel(tmp, EBI_CSR1);
232 writel(0, EBI_LOCK);
233 }
234}
235
236static void ap_flash_set_vpp(struct platform_device *pdev, int on)
237{
238 if (on)
239 writel(INTEGRATOR_SC_CTRL_nFLVPPEN,
240 ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
241 else
242 writel(INTEGRATOR_SC_CTRL_nFLVPPEN,
243 ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
244}
245
246static struct physmap_flash_data ap_flash_data = {
247 .width = 4,
248 .init = ap_flash_init,
249 .exit = ap_flash_exit,
250 .set_vpp = ap_flash_set_vpp,
251};
252
253
254
255
256
257
258static void integrator_uart_set_mctrl(struct amba_device *dev,
259 void __iomem *base, unsigned int mctrl)
260{
261 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
262 u32 phybase = dev->res.start;
263
264 if (phybase == INTEGRATOR_UART0_BASE) {
265
266 rts_mask = 1 << 4;
267 dtr_mask = 1 << 5;
268 } else {
269
270 rts_mask = 1 << 6;
271 dtr_mask = 1 << 7;
272 }
273
274 if (mctrl & TIOCM_RTS)
275 ctrlc |= rts_mask;
276 else
277 ctrls |= rts_mask;
278
279 if (mctrl & TIOCM_DTR)
280 ctrlc |= dtr_mask;
281 else
282 ctrls |= dtr_mask;
283
284 __raw_writel(ctrls, ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
285 __raw_writel(ctrlc, ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
286}
287
288struct amba_pl010_data ap_uart_data = {
289 .set_mctrl = integrator_uart_set_mctrl,
290};
291
292
293
294
295#define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
296#define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
297#define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
298
299static unsigned long timer_reload;
300
301static u32 notrace integrator_read_sched_clock(void)
302{
303 return -readl((void __iomem *) TIMER2_VA_BASE + TIMER_VALUE);
304}
305
306static void integrator_clocksource_init(unsigned long inrate,
307 void __iomem *base)
308{
309 u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
310 unsigned long rate = inrate;
311
312 if (rate >= 1500000) {
313 rate /= 16;
314 ctrl |= TIMER_CTRL_DIV16;
315 }
316
317 writel(0xffff, base + TIMER_LOAD);
318 writel(ctrl, base + TIMER_CTRL);
319
320 clocksource_mmio_init(base + TIMER_VALUE, "timer2",
321 rate, 200, 16, clocksource_mmio_readl_down);
322 setup_sched_clock(integrator_read_sched_clock, 16, rate);
323}
324
325static void __iomem * clkevt_base;
326
327
328
329
330static irqreturn_t integrator_timer_interrupt(int irq, void *dev_id)
331{
332 struct clock_event_device *evt = dev_id;
333
334
335 writel(1, clkevt_base + TIMER_INTCLR);
336
337 evt->event_handler(evt);
338
339 return IRQ_HANDLED;
340}
341
342static void clkevt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt)
343{
344 u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
345
346
347 writel(ctrl, clkevt_base + TIMER_CTRL);
348
349 switch (mode) {
350 case CLOCK_EVT_MODE_PERIODIC:
351
352 writel(timer_reload, clkevt_base + TIMER_LOAD);
353 ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
354 writel(ctrl, clkevt_base + TIMER_CTRL);
355 break;
356 case CLOCK_EVT_MODE_ONESHOT:
357
358 ctrl &= ~TIMER_CTRL_PERIODIC;
359 writel(ctrl, clkevt_base + TIMER_CTRL);
360 break;
361 case CLOCK_EVT_MODE_UNUSED:
362 case CLOCK_EVT_MODE_SHUTDOWN:
363 case CLOCK_EVT_MODE_RESUME:
364 default:
365
366 break;
367 }
368
369}
370
371static int clkevt_set_next_event(unsigned long next, struct clock_event_device *evt)
372{
373 unsigned long ctrl = readl(clkevt_base + TIMER_CTRL);
374
375 writel(ctrl & ~TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
376 writel(next, clkevt_base + TIMER_LOAD);
377 writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
378
379 return 0;
380}
381
382static struct clock_event_device integrator_clockevent = {
383 .name = "timer1",
384 .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
385 .set_mode = clkevt_set_mode,
386 .set_next_event = clkevt_set_next_event,
387 .rating = 300,
388};
389
390static struct irqaction integrator_timer_irq = {
391 .name = "timer",
392 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
393 .handler = integrator_timer_interrupt,
394 .dev_id = &integrator_clockevent,
395};
396
397static void integrator_clockevent_init(unsigned long inrate,
398 void __iomem *base, int irq)
399{
400 unsigned long rate = inrate;
401 unsigned int ctrl = 0;
402
403 clkevt_base = base;
404
405 if (rate > 0x100000 * HZ) {
406 rate /= 256;
407 ctrl |= TIMER_CTRL_DIV256;
408 } else if (rate > 0x10000 * HZ) {
409 rate /= 16;
410 ctrl |= TIMER_CTRL_DIV16;
411 }
412 timer_reload = rate / HZ;
413 writel(ctrl, clkevt_base + TIMER_CTRL);
414
415 setup_irq(irq, &integrator_timer_irq);
416 clockevents_config_and_register(&integrator_clockevent,
417 rate,
418 1,
419 0xffffU);
420}
421
422void __init ap_init_early(void)
423{
424}
425
426#ifdef CONFIG_OF
427
428static void __init ap_of_timer_init(void)
429{
430 struct device_node *node;
431 const char *path;
432 void __iomem *base;
433 int err;
434 int irq;
435 struct clk *clk;
436 unsigned long rate;
437
438 clk = clk_get_sys("ap_timer", NULL);
439 BUG_ON(IS_ERR(clk));
440 clk_prepare_enable(clk);
441 rate = clk_get_rate(clk);
442
443 err = of_property_read_string(of_aliases,
444 "arm,timer-primary", &path);
445 if (WARN_ON(err))
446 return;
447 node = of_find_node_by_path(path);
448 base = of_iomap(node, 0);
449 if (WARN_ON(!base))
450 return;
451 writel(0, base + TIMER_CTRL);
452 integrator_clocksource_init(rate, base);
453
454 err = of_property_read_string(of_aliases,
455 "arm,timer-secondary", &path);
456 if (WARN_ON(err))
457 return;
458 node = of_find_node_by_path(path);
459 base = of_iomap(node, 0);
460 if (WARN_ON(!base))
461 return;
462 irq = irq_of_parse_and_map(node, 0);
463 writel(0, base + TIMER_CTRL);
464 integrator_clockevent_init(rate, base, irq);
465}
466
467static const struct of_device_id fpga_irq_of_match[] __initconst = {
468 { .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
469 { }
470};
471
472static void __init ap_init_irq_of(void)
473{
474
475 writel(0xffffffffU, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
476 of_irq_init(fpga_irq_of_match);
477 integrator_clk_init(false);
478}
479
480
481static struct of_dev_auxdata ap_auxdata_lookup[] __initdata = {
482 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
483 "rtc", NULL),
484 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
485 "uart0", &ap_uart_data),
486 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
487 "uart1", &ap_uart_data),
488 OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
489 "kmi0", NULL),
490 OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
491 "kmi1", NULL),
492 OF_DEV_AUXDATA("cfi-flash", INTEGRATOR_FLASH_BASE,
493 "physmap-flash", &ap_flash_data),
494 { },
495};
496
497static void __init ap_init_of(void)
498{
499 unsigned long sc_dec;
500 struct device_node *root;
501 struct device_node *syscon;
502 struct device *parent;
503 struct soc_device *soc_dev;
504 struct soc_device_attribute *soc_dev_attr;
505 u32 ap_sc_id;
506 int err;
507 int i;
508
509
510 root = of_find_node_by_path("/");
511 if (!root)
512 return;
513 syscon = of_find_node_by_path("/syscon");
514 if (!syscon)
515 return;
516
517 ap_syscon_base = of_iomap(syscon, 0);
518 if (!ap_syscon_base)
519 return;
520
521 ap_sc_id = readl(ap_syscon_base);
522
523 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
524 if (!soc_dev_attr)
525 return;
526
527 err = of_property_read_string(root, "compatible",
528 &soc_dev_attr->soc_id);
529 if (err)
530 return;
531 err = of_property_read_string(root, "model", &soc_dev_attr->machine);
532 if (err)
533 return;
534 soc_dev_attr->family = "Integrator";
535 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c",
536 'A' + (ap_sc_id & 0x0f));
537
538 soc_dev = soc_device_register(soc_dev_attr);
539 if (IS_ERR(soc_dev)) {
540 kfree(soc_dev_attr->revision);
541 kfree(soc_dev_attr);
542 return;
543 }
544
545 parent = soc_device_to_device(soc_dev);
546 integrator_init_sysfs(parent, ap_sc_id);
547
548 of_platform_populate(root, of_default_bus_match_table,
549 ap_auxdata_lookup, parent);
550
551 sc_dec = readl(ap_syscon_base + INTEGRATOR_SC_DEC_OFFSET);
552 for (i = 0; i < 4; i++) {
553 struct lm_device *lmdev;
554
555 if ((sc_dec & (16 << i)) == 0)
556 continue;
557
558 lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
559 if (!lmdev)
560 continue;
561
562 lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
563 lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
564 lmdev->resource.flags = IORESOURCE_MEM;
565 lmdev->irq = IRQ_AP_EXPINT0 + i;
566 lmdev->id = i;
567
568 lm_device_register(lmdev);
569 }
570}
571
572static const char * ap_dt_board_compat[] = {
573 "arm,integrator-ap",
574 NULL,
575};
576
577DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
578 .reserve = integrator_reserve,
579 .map_io = ap_map_io,
580 .init_early = ap_init_early,
581 .init_irq = ap_init_irq_of,
582 .handle_irq = fpga_handle_irq,
583 .init_time = ap_of_timer_init,
584 .init_machine = ap_init_of,
585 .restart = integrator_restart,
586 .dt_compat = ap_dt_board_compat,
587MACHINE_END
588
589#endif
590
591#ifdef CONFIG_ATAGS
592
593
594
595
596
597
598static struct map_desc ap_io_desc_atag[] __initdata = {
599 {
600 .virtual = IO_ADDRESS(INTEGRATOR_SC_BASE),
601 .pfn = __phys_to_pfn(INTEGRATOR_SC_BASE),
602 .length = SZ_4K,
603 .type = MT_DEVICE
604 },
605};
606
607static void __init ap_map_io_atag(void)
608{
609 iotable_init(ap_io_desc_atag, ARRAY_SIZE(ap_io_desc_atag));
610 ap_map_io();
611}
612
613
614
615
616
617
618static struct resource cfi_flash_resource = {
619 .start = INTEGRATOR_FLASH_BASE,
620 .end = INTEGRATOR_FLASH_BASE + INTEGRATOR_FLASH_SIZE - 1,
621 .flags = IORESOURCE_MEM,
622};
623
624static struct platform_device cfi_flash_device = {
625 .name = "physmap-flash",
626 .id = 0,
627 .dev = {
628 .platform_data = &ap_flash_data,
629 },
630 .num_resources = 1,
631 .resource = &cfi_flash_resource,
632};
633
634static void __init ap_timer_init(void)
635{
636 struct clk *clk;
637 unsigned long rate;
638
639 clk = clk_get_sys("ap_timer", NULL);
640 BUG_ON(IS_ERR(clk));
641 clk_prepare_enable(clk);
642 rate = clk_get_rate(clk);
643
644 writel(0, TIMER0_VA_BASE + TIMER_CTRL);
645 writel(0, TIMER1_VA_BASE + TIMER_CTRL);
646 writel(0, TIMER2_VA_BASE + TIMER_CTRL);
647
648 integrator_clocksource_init(rate, (void __iomem *)TIMER2_VA_BASE);
649 integrator_clockevent_init(rate, (void __iomem *)TIMER1_VA_BASE,
650 IRQ_TIMERINT1);
651}
652
653#define INTEGRATOR_SC_VALID_INT 0x003fffff
654
655static void __init ap_init_irq(void)
656{
657
658
659 writel(-1, VA_CMIC_BASE + IRQ_ENABLE_CLEAR);
660
661
662 writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
663 writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
664
665 fpga_irq_init(VA_IC_BASE, "SC", IRQ_PIC_START,
666 -1, INTEGRATOR_SC_VALID_INT, NULL);
667 integrator_clk_init(false);
668}
669
670static void __init ap_init(void)
671{
672 unsigned long sc_dec;
673 int i;
674
675 platform_device_register(&cfi_flash_device);
676
677 ap_syscon_base = __io_address(INTEGRATOR_SC_BASE);
678 sc_dec = readl(ap_syscon_base + INTEGRATOR_SC_DEC_OFFSET);
679 for (i = 0; i < 4; i++) {
680 struct lm_device *lmdev;
681
682 if ((sc_dec & (16 << i)) == 0)
683 continue;
684
685 lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
686 if (!lmdev)
687 continue;
688
689 lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
690 lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
691 lmdev->resource.flags = IORESOURCE_MEM;
692 lmdev->irq = IRQ_AP_EXPINT0 + i;
693 lmdev->id = i;
694
695 lm_device_register(lmdev);
696 }
697
698 integrator_init(false);
699}
700
701MACHINE_START(INTEGRATOR, "ARM-Integrator")
702
703 .atag_offset = 0x100,
704 .reserve = integrator_reserve,
705 .map_io = ap_map_io_atag,
706 .init_early = ap_init_early,
707 .init_irq = ap_init_irq,
708 .handle_irq = fpga_handle_irq,
709 .init_time = ap_timer_init,
710 .init_machine = ap_init,
711 .restart = integrator_restart,
712MACHINE_END
713
714#endif
715
