2 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
5 * Common Codes for EXYNOS
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/interrupt.h>
14 #include <linux/irq.h>
16 #include <linux/device.h>
17 #include <linux/gpio.h>
18 #include <linux/sched.h>
19 #include <linux/serial_core.h>
21 #include <linux/of_irq.h>
22 #include <linux/export.h>
23 #include <linux/irqdomain.h>
24 #include <linux/of_address.h>
26 #include <asm/proc-fns.h>
27 #include <asm/exception.h>
28 #include <asm/hardware/cache-l2x0.h>
29 #include <asm/hardware/gic.h>
30 #include <asm/mach/map.h>
31 #include <asm/mach/irq.h>
32 #include <asm/cacheflush.h>
34 #include <mach/regs-irq.h>
35 #include <mach/regs-pmu.h>
36 #include <mach/regs-gpio.h>
40 #include <plat/clock.h>
41 #include <plat/devs.h>
43 #include <plat/sdhci.h>
44 #include <plat/gpio-cfg.h>
45 #include <plat/adc-core.h>
46 #include <plat/fb-core.h>
47 #include <plat/fimc-core.h>
48 #include <plat/iic-core.h>
49 #include <plat/tv-core.h>
50 #include <plat/regs-serial.h>
53 #define L2_AUX_VAL 0x7C470001
54 #define L2_AUX_MASK 0xC200ffff
56 static const char name_exynos4210[] = "EXYNOS4210";
57 static const char name_exynos4212[] = "EXYNOS4212";
58 static const char name_exynos4412[] = "EXYNOS4412";
59 static const char name_exynos5250[] = "EXYNOS5250";
61 static void exynos4_map_io(void);
62 static void exynos5_map_io(void);
63 static void exynos4_init_clocks(int xtal);
64 static void exynos5_init_clocks(int xtal);
65 static void exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no);
66 static int exynos_init(void);
68 static struct cpu_table cpu_ids[] __initdata = {
70 .idcode = EXYNOS4210_CPU_ID,
71 .idmask = EXYNOS4_CPU_MASK,
72 .map_io = exynos4_map_io,
73 .init_clocks = exynos4_init_clocks,
74 .init_uarts = exynos_init_uarts,
76 .name = name_exynos4210,
78 .idcode = EXYNOS4212_CPU_ID,
79 .idmask = EXYNOS4_CPU_MASK,
80 .map_io = exynos4_map_io,
81 .init_clocks = exynos4_init_clocks,
82 .init_uarts = exynos_init_uarts,
84 .name = name_exynos4212,
86 .idcode = EXYNOS4412_CPU_ID,
87 .idmask = EXYNOS4_CPU_MASK,
88 .map_io = exynos4_map_io,
89 .init_clocks = exynos4_init_clocks,
90 .init_uarts = exynos_init_uarts,
92 .name = name_exynos4412,
94 .idcode = EXYNOS5250_SOC_ID,
95 .idmask = EXYNOS5_SOC_MASK,
96 .map_io = exynos5_map_io,
97 .init_clocks = exynos5_init_clocks,
98 .init_uarts = exynos_init_uarts,
100 .name = name_exynos5250,
104 /* Initial IO mappings */
106 static struct map_desc exynos_iodesc[] __initdata = {
108 .virtual = (unsigned long)S5P_VA_CHIPID,
109 .pfn = __phys_to_pfn(EXYNOS_PA_CHIPID),
115 static struct map_desc exynos4_iodesc[] __initdata = {
117 .virtual = (unsigned long)S3C_VA_SYS,
118 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
122 .virtual = (unsigned long)S3C_VA_TIMER,
123 .pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
127 .virtual = (unsigned long)S3C_VA_WATCHDOG,
128 .pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
132 .virtual = (unsigned long)S5P_VA_SROMC,
133 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
137 .virtual = (unsigned long)S5P_VA_SYSTIMER,
138 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
142 .virtual = (unsigned long)S5P_VA_PMU,
143 .pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
147 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
148 .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
152 .virtual = (unsigned long)S5P_VA_GIC_CPU,
153 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
157 .virtual = (unsigned long)S5P_VA_GIC_DIST,
158 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
162 .virtual = (unsigned long)S3C_VA_UART,
163 .pfn = __phys_to_pfn(EXYNOS4_PA_UART),
167 .virtual = (unsigned long)S5P_VA_CMU,
168 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
172 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
173 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
177 .virtual = (unsigned long)S5P_VA_L2CC,
178 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
182 .virtual = (unsigned long)S5P_VA_DMC0,
183 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
187 .virtual = (unsigned long)S5P_VA_DMC1,
188 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
192 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
193 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
199 static struct map_desc exynos4_iodesc0[] __initdata = {
201 .virtual = (unsigned long)S5P_VA_SYSRAM,
202 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
208 static struct map_desc exynos4_iodesc1[] __initdata = {
210 .virtual = (unsigned long)S5P_VA_SYSRAM,
211 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
217 static struct map_desc exynos5_iodesc[] __initdata = {
219 .virtual = (unsigned long)S3C_VA_SYS,
220 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
224 .virtual = (unsigned long)S3C_VA_TIMER,
225 .pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
229 .virtual = (unsigned long)S3C_VA_WATCHDOG,
230 .pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
234 .virtual = (unsigned long)S5P_VA_SROMC,
235 .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
239 .virtual = (unsigned long)S5P_VA_SYSTIMER,
240 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSTIMER),
244 .virtual = (unsigned long)S5P_VA_SYSRAM,
245 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
249 .virtual = (unsigned long)S5P_VA_CMU,
250 .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
251 .length = 144 * SZ_1K,
254 .virtual = (unsigned long)S5P_VA_PMU,
255 .pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
259 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
260 .pfn = __phys_to_pfn(EXYNOS5_PA_COMBINER),
264 .virtual = (unsigned long)S3C_VA_UART,
265 .pfn = __phys_to_pfn(EXYNOS5_PA_UART),
269 .virtual = (unsigned long)S5P_VA_GIC_CPU,
270 .pfn = __phys_to_pfn(EXYNOS5_PA_GIC_CPU),
274 .virtual = (unsigned long)S5P_VA_GIC_DIST,
275 .pfn = __phys_to_pfn(EXYNOS5_PA_GIC_DIST),
281 void exynos4_restart(char mode, const char *cmd)
283 __raw_writel(0x1, S5P_SWRESET);
286 void exynos5_restart(char mode, const char *cmd)
288 __raw_writel(0x1, EXYNOS_SWRESET);
291 void __init exynos_init_late(void)
293 exynos_pm_late_initcall();
299 * register the standard cpu IO areas
302 void __init exynos_init_io(struct map_desc *mach_desc, int size)
304 /* initialize the io descriptors we need for initialization */
305 iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));
307 iotable_init(mach_desc, size);
309 /* detect cpu id and rev. */
310 s5p_init_cpu(S5P_VA_CHIPID);
312 s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
315 static void __init exynos4_map_io(void)
317 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
319 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
320 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
322 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
324 /* initialize device information early */
325 exynos4_default_sdhci0();
326 exynos4_default_sdhci1();
327 exynos4_default_sdhci2();
328 exynos4_default_sdhci3();
330 s3c_adc_setname("samsung-adc-v3");
332 s3c_fimc_setname(0, "exynos4-fimc");
333 s3c_fimc_setname(1, "exynos4-fimc");
334 s3c_fimc_setname(2, "exynos4-fimc");
335 s3c_fimc_setname(3, "exynos4-fimc");
337 s3c_sdhci_setname(0, "exynos4-sdhci");
338 s3c_sdhci_setname(1, "exynos4-sdhci");
339 s3c_sdhci_setname(2, "exynos4-sdhci");
340 s3c_sdhci_setname(3, "exynos4-sdhci");
342 /* The I2C bus controllers are directly compatible with s3c2440 */
343 s3c_i2c0_setname("s3c2440-i2c");
344 s3c_i2c1_setname("s3c2440-i2c");
345 s3c_i2c2_setname("s3c2440-i2c");
347 s5p_fb_setname(0, "exynos4-fb");
348 s5p_hdmi_setname("exynos4-hdmi");
351 static void __init exynos5_map_io(void)
353 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
355 s3c_device_i2c0.resource[0].start = EXYNOS5_PA_IIC(0);
356 s3c_device_i2c0.resource[0].end = EXYNOS5_PA_IIC(0) + SZ_4K - 1;
357 s3c_device_i2c0.resource[1].start = EXYNOS5_IRQ_IIC;
358 s3c_device_i2c0.resource[1].end = EXYNOS5_IRQ_IIC;
360 s3c_sdhci_setname(0, "exynos4-sdhci");
361 s3c_sdhci_setname(1, "exynos4-sdhci");
362 s3c_sdhci_setname(2, "exynos4-sdhci");
363 s3c_sdhci_setname(3, "exynos4-sdhci");
365 /* The I2C bus controllers are directly compatible with s3c2440 */
366 s3c_i2c0_setname("s3c2440-i2c");
367 s3c_i2c1_setname("s3c2440-i2c");
368 s3c_i2c2_setname("s3c2440-i2c");
371 static void __init exynos4_init_clocks(int xtal)
373 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
375 s3c24xx_register_baseclocks(xtal);
376 s5p_register_clocks(xtal);
378 if (soc_is_exynos4210())
379 exynos4210_register_clocks();
380 else if (soc_is_exynos4212() || soc_is_exynos4412())
381 exynos4212_register_clocks();
383 exynos4_register_clocks();
384 exynos4_setup_clocks();
387 static void __init exynos5_init_clocks(int xtal)
389 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
391 s3c24xx_register_baseclocks(xtal);
392 s5p_register_clocks(xtal);
394 exynos5_register_clocks();
395 exynos5_setup_clocks();
398 #define COMBINER_ENABLE_SET 0x0
399 #define COMBINER_ENABLE_CLEAR 0x4
400 #define COMBINER_INT_STATUS 0xC
402 static DEFINE_SPINLOCK(irq_controller_lock);
404 struct combiner_chip_data {
405 unsigned int irq_offset;
406 unsigned int irq_mask;
410 static struct irq_domain *combiner_irq_domain;
411 static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
413 static inline void __iomem *combiner_base(struct irq_data *data)
415 struct combiner_chip_data *combiner_data =
416 irq_data_get_irq_chip_data(data);
418 return combiner_data->base;
421 static void combiner_mask_irq(struct irq_data *data)
423 u32 mask = 1 << (data->hwirq % 32);
425 __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
428 static void combiner_unmask_irq(struct irq_data *data)
430 u32 mask = 1 << (data->hwirq % 32);
432 __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
435 static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
437 struct combiner_chip_data *chip_data = irq_get_handler_data(irq);
438 struct irq_chip *chip = irq_get_chip(irq);
439 unsigned int cascade_irq, combiner_irq;
440 unsigned long status;
442 chained_irq_enter(chip, desc);
444 spin_lock(&irq_controller_lock);
445 status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
446 spin_unlock(&irq_controller_lock);
447 status &= chip_data->irq_mask;
452 combiner_irq = __ffs(status);
454 cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
455 if (unlikely(cascade_irq >= NR_IRQS))
456 do_bad_IRQ(cascade_irq, desc);
458 generic_handle_irq(cascade_irq);
461 chained_irq_exit(chip, desc);
464 static struct irq_chip combiner_chip = {
466 .irq_mask = combiner_mask_irq,
467 .irq_unmask = combiner_unmask_irq,
470 static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
474 if (soc_is_exynos5250())
475 max_nr = EXYNOS5_MAX_COMBINER_NR;
477 max_nr = EXYNOS4_MAX_COMBINER_NR;
479 if (combiner_nr >= max_nr)
481 if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
483 irq_set_chained_handler(irq, combiner_handle_cascade_irq);
486 static void __init combiner_init_one(unsigned int combiner_nr,
489 combiner_data[combiner_nr].base = base;
490 combiner_data[combiner_nr].irq_offset = irq_find_mapping(
491 combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER);
492 combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
494 /* Disable all interrupts */
495 __raw_writel(combiner_data[combiner_nr].irq_mask,
496 base + COMBINER_ENABLE_CLEAR);
500 static int combiner_irq_domain_xlate(struct irq_domain *d,
501 struct device_node *controller,
502 const u32 *intspec, unsigned int intsize,
503 unsigned long *out_hwirq,
504 unsigned int *out_type)
506 if (d->of_node != controller)
512 *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1];
518 static int combiner_irq_domain_xlate(struct irq_domain *d,
519 struct device_node *controller,
520 const u32 *intspec, unsigned int intsize,
521 unsigned long *out_hwirq,
522 unsigned int *out_type)
528 static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq,
531 irq_set_chip_and_handler(irq, &combiner_chip, handle_level_irq);
532 irq_set_chip_data(irq, &combiner_data[hw >> 3]);
533 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
538 static struct irq_domain_ops combiner_irq_domain_ops = {
539 .xlate = combiner_irq_domain_xlate,
540 .map = combiner_irq_domain_map,
543 void __init combiner_init(void __iomem *combiner_base, struct device_node *np)
545 int i, irq, irq_base;
546 unsigned int max_nr, nr_irq;
549 if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
550 pr_warning("%s: number of combiners not specified, "
551 "setting default as %d.\n",
552 __func__, EXYNOS4_MAX_COMBINER_NR);
553 max_nr = EXYNOS4_MAX_COMBINER_NR;
556 max_nr = soc_is_exynos5250() ? EXYNOS5_MAX_COMBINER_NR :
557 EXYNOS4_MAX_COMBINER_NR;
559 nr_irq = max_nr * MAX_IRQ_IN_COMBINER;
561 irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0);
562 if (IS_ERR_VALUE(irq_base)) {
563 irq_base = COMBINER_IRQ(0, 0);
564 pr_warning("%s: irq desc alloc failed. Continuing with %d as linux irq base\n", __func__, irq_base);
567 combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0,
568 &combiner_irq_domain_ops, &combiner_data);
569 if (WARN_ON(!combiner_irq_domain)) {
570 pr_warning("%s: irq domain init failed\n", __func__);
574 for (i = 0; i < max_nr; i++) {
575 combiner_init_one(i, combiner_base + (i >> 2) * 0x10);
579 irq = irq_of_parse_and_map(np, i);
581 combiner_cascade_irq(i, irq);
586 int __init combiner_of_init(struct device_node *np, struct device_node *parent)
588 void __iomem *combiner_base;
590 combiner_base = of_iomap(np, 0);
591 if (!combiner_base) {
592 pr_err("%s: failed to map combiner registers\n", __func__);
596 combiner_init(combiner_base, np);
601 static const struct of_device_id exynos4_dt_irq_match[] = {
602 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
603 { .compatible = "samsung,exynos4210-combiner",
604 .data = combiner_of_init, },
609 void __init exynos4_init_irq(void)
611 unsigned int gic_bank_offset;
613 gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
615 if (!of_have_populated_dt())
616 gic_init_bases(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU, gic_bank_offset, NULL);
619 of_irq_init(exynos4_dt_irq_match);
622 if (!of_have_populated_dt())
623 combiner_init(S5P_VA_COMBINER_BASE, NULL);
626 * The parameters of s5p_init_irq() are for VIC init.
627 * Theses parameters should be NULL and 0 because EXYNOS4
628 * uses GIC instead of VIC.
630 s5p_init_irq(NULL, 0);
633 void __init exynos5_init_irq(void)
636 of_irq_init(exynos4_dt_irq_match);
639 * The parameters of s5p_init_irq() are for VIC init.
640 * Theses parameters should be NULL and 0 because EXYNOS4
641 * uses GIC instead of VIC.
643 s5p_init_irq(NULL, 0);
646 struct bus_type exynos_subsys = {
647 .name = "exynos-core",
648 .dev_name = "exynos-core",
651 static struct device exynos4_dev = {
652 .bus = &exynos_subsys,
655 static int __init exynos_core_init(void)
657 return subsys_system_register(&exynos_subsys, NULL);
659 core_initcall(exynos_core_init);
661 #ifdef CONFIG_CACHE_L2X0
662 static int __init exynos4_l2x0_cache_init(void)
666 if (soc_is_exynos5250())
669 ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
671 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
672 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
676 if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) {
677 l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC;
678 /* TAG, Data Latency Control: 2 cycles */
679 l2x0_saved_regs.tag_latency = 0x110;
681 if (soc_is_exynos4212() || soc_is_exynos4412())
682 l2x0_saved_regs.data_latency = 0x120;
684 l2x0_saved_regs.data_latency = 0x110;
686 l2x0_saved_regs.prefetch_ctrl = 0x30000007;
687 l2x0_saved_regs.pwr_ctrl =
688 (L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN);
690 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
692 __raw_writel(l2x0_saved_regs.tag_latency,
693 S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
694 __raw_writel(l2x0_saved_regs.data_latency,
695 S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
697 /* L2X0 Prefetch Control */
698 __raw_writel(l2x0_saved_regs.prefetch_ctrl,
699 S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
701 /* L2X0 Power Control */
702 __raw_writel(l2x0_saved_regs.pwr_ctrl,
703 S5P_VA_L2CC + L2X0_POWER_CTRL);
705 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
706 clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs));
709 l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK);
712 early_initcall(exynos4_l2x0_cache_init);
715 static int __init exynos5_l2_cache_init(void)
719 if (!soc_is_exynos5250())
722 asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
723 "bic %0, %0, #(1 << 2)\n" /* cache disable */
724 "mcr p15, 0, %0, c1, c0, 0\n"
725 "mrc p15, 1, %0, c9, c0, 2\n"
728 val |= (1 << 9) | (1 << 5) | (2 << 6) | (2 << 0);
730 asm volatile("mcr p15, 1, %0, c9, c0, 2\n" : : "r"(val));
731 asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
732 "orr %0, %0, #(1 << 2)\n" /* cache enable */
733 "mcr p15, 0, %0, c1, c0, 0\n"
738 early_initcall(exynos5_l2_cache_init);
740 static int __init exynos_init(void)
742 printk(KERN_INFO "EXYNOS: Initializing architecture\n");
744 return device_register(&exynos4_dev);
747 /* uart registration process */
749 static void __init exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no)
751 struct s3c2410_uartcfg *tcfg = cfg;
754 for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
755 tcfg->has_fracval = 1;
757 if (soc_is_exynos5250())
758 s3c24xx_init_uartdevs("exynos4210-uart", exynos5_uart_resources, cfg, no);
760 s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no);
763 static void __iomem *exynos_eint_base;
765 static DEFINE_SPINLOCK(eint_lock);
767 static unsigned int eint0_15_data[16];
769 static inline int exynos4_irq_to_gpio(unsigned int irq)
771 if (irq < IRQ_EINT(0))
776 return EXYNOS4_GPX0(irq);
780 return EXYNOS4_GPX1(irq);
784 return EXYNOS4_GPX2(irq);
788 return EXYNOS4_GPX3(irq);
793 static inline int exynos5_irq_to_gpio(unsigned int irq)
795 if (irq < IRQ_EINT(0))
800 return EXYNOS5_GPX0(irq);
804 return EXYNOS5_GPX1(irq);
808 return EXYNOS5_GPX2(irq);
812 return EXYNOS5_GPX3(irq);
817 static unsigned int exynos4_eint0_15_src_int[16] = {
836 static unsigned int exynos5_eint0_15_src_int[16] = {
854 static inline void exynos_irq_eint_mask(struct irq_data *data)
858 spin_lock(&eint_lock);
859 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
860 mask |= EINT_OFFSET_BIT(data->irq);
861 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
862 spin_unlock(&eint_lock);
865 static void exynos_irq_eint_unmask(struct irq_data *data)
869 spin_lock(&eint_lock);
870 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
871 mask &= ~(EINT_OFFSET_BIT(data->irq));
872 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
873 spin_unlock(&eint_lock);
876 static inline void exynos_irq_eint_ack(struct irq_data *data)
878 __raw_writel(EINT_OFFSET_BIT(data->irq),
879 EINT_PEND(exynos_eint_base, data->irq));
882 static void exynos_irq_eint_maskack(struct irq_data *data)
884 exynos_irq_eint_mask(data);
885 exynos_irq_eint_ack(data);
888 static int exynos_irq_eint_set_type(struct irq_data *data, unsigned int type)
890 int offs = EINT_OFFSET(data->irq);
896 case IRQ_TYPE_EDGE_RISING:
897 newvalue = S5P_IRQ_TYPE_EDGE_RISING;
900 case IRQ_TYPE_EDGE_FALLING:
901 newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
904 case IRQ_TYPE_EDGE_BOTH:
905 newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
908 case IRQ_TYPE_LEVEL_LOW:
909 newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
912 case IRQ_TYPE_LEVEL_HIGH:
913 newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
917 printk(KERN_ERR "No such irq type %d", type);
921 shift = (offs & 0x7) * 4;
924 spin_lock(&eint_lock);
925 ctrl = __raw_readl(EINT_CON(exynos_eint_base, data->irq));
927 ctrl |= newvalue << shift;
928 __raw_writel(ctrl, EINT_CON(exynos_eint_base, data->irq));
929 spin_unlock(&eint_lock);
931 if (soc_is_exynos5250())
932 s3c_gpio_cfgpin(exynos5_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
934 s3c_gpio_cfgpin(exynos4_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
939 static struct irq_chip exynos_irq_eint = {
940 .name = "exynos-eint",
941 .irq_mask = exynos_irq_eint_mask,
942 .irq_unmask = exynos_irq_eint_unmask,
943 .irq_mask_ack = exynos_irq_eint_maskack,
944 .irq_ack = exynos_irq_eint_ack,
945 .irq_set_type = exynos_irq_eint_set_type,
947 .irq_set_wake = s3c_irqext_wake,
952 * exynos4_irq_demux_eint
954 * This function demuxes the IRQ from from EINTs 16 to 31.
955 * It is designed to be inlined into the specific handler
956 * s5p_irq_demux_eintX_Y.
958 * Each EINT pend/mask registers handle eight of them.
960 static inline void exynos_irq_demux_eint(unsigned int start)
964 u32 status = __raw_readl(EINT_PEND(exynos_eint_base, start));
965 u32 mask = __raw_readl(EINT_MASK(exynos_eint_base, start));
971 irq = fls(status) - 1;
972 generic_handle_irq(irq + start);
973 status &= ~(1 << irq);
977 static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
979 struct irq_chip *chip = irq_get_chip(irq);
980 chained_irq_enter(chip, desc);
981 exynos_irq_demux_eint(IRQ_EINT(16));
982 exynos_irq_demux_eint(IRQ_EINT(24));
983 chained_irq_exit(chip, desc);
986 static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
988 u32 *irq_data = irq_get_handler_data(irq);
989 struct irq_chip *chip = irq_get_chip(irq);
991 chained_irq_enter(chip, desc);
992 chip->irq_mask(&desc->irq_data);
995 chip->irq_ack(&desc->irq_data);
997 generic_handle_irq(*irq_data);
999 chip->irq_unmask(&desc->irq_data);
1000 chained_irq_exit(chip, desc);
1003 static int __init exynos_init_irq_eint(void)
1007 if (soc_is_exynos5250())
1008 exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
1010 exynos_eint_base = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
1012 if (exynos_eint_base == NULL) {
1013 pr_err("unable to ioremap for EINT base address\n");
1017 for (irq = 0 ; irq <= 31 ; irq++) {
1018 irq_set_chip_and_handler(IRQ_EINT(irq), &exynos_irq_eint,
1020 set_irq_flags(IRQ_EINT(irq), IRQF_VALID);
1023 irq_set_chained_handler(EXYNOS_IRQ_EINT16_31, exynos_irq_demux_eint16_31);
1025 for (irq = 0 ; irq <= 15 ; irq++) {
1026 eint0_15_data[irq] = IRQ_EINT(irq);
1028 if (soc_is_exynos5250()) {
1029 irq_set_handler_data(exynos5_eint0_15_src_int[irq],
1030 &eint0_15_data[irq]);
1031 irq_set_chained_handler(exynos5_eint0_15_src_int[irq],
1032 exynos_irq_eint0_15);
1034 irq_set_handler_data(exynos4_eint0_15_src_int[irq],
1035 &eint0_15_data[irq]);
1036 irq_set_chained_handler(exynos4_eint0_15_src_int[irq],
1037 exynos_irq_eint0_15);
1043 arch_initcall(exynos_init_irq_eint);