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/spi-core.h>
51 #include <plat/regs-serial.h>
54 #define L2_AUX_VAL 0x7C470001
55 #define L2_AUX_MASK 0xC200ffff
57 static const char name_exynos4210[] = "EXYNOS4210";
58 static const char name_exynos4212[] = "EXYNOS4212";
59 static const char name_exynos4412[] = "EXYNOS4412";
60 static const char name_exynos5250[] = "EXYNOS5250";
62 static void exynos4_map_io(void);
63 static void exynos5_map_io(void);
64 static void exynos4_init_clocks(int xtal);
65 static void exynos5_init_clocks(int xtal);
66 static void exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no);
67 static int exynos_init(void);
69 static struct cpu_table cpu_ids[] __initdata = {
71 .idcode = EXYNOS4210_CPU_ID,
72 .idmask = EXYNOS4_CPU_MASK,
73 .map_io = exynos4_map_io,
74 .init_clocks = exynos4_init_clocks,
75 .init_uarts = exynos4_init_uarts,
77 .name = name_exynos4210,
79 .idcode = EXYNOS4212_CPU_ID,
80 .idmask = EXYNOS4_CPU_MASK,
81 .map_io = exynos4_map_io,
82 .init_clocks = exynos4_init_clocks,
83 .init_uarts = exynos4_init_uarts,
85 .name = name_exynos4212,
87 .idcode = EXYNOS4412_CPU_ID,
88 .idmask = EXYNOS4_CPU_MASK,
89 .map_io = exynos4_map_io,
90 .init_clocks = exynos4_init_clocks,
91 .init_uarts = exynos4_init_uarts,
93 .name = name_exynos4412,
95 .idcode = EXYNOS5250_SOC_ID,
96 .idmask = EXYNOS5_SOC_MASK,
97 .map_io = exynos5_map_io,
98 .init_clocks = exynos5_init_clocks,
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)S3C_VA_UART,
260 .pfn = __phys_to_pfn(EXYNOS5_PA_UART),
266 void exynos4_restart(char mode, const char *cmd)
268 __raw_writel(0x1, S5P_SWRESET);
271 void exynos5_restart(char mode, const char *cmd)
273 __raw_writel(0x1, EXYNOS_SWRESET);
276 void __init exynos_init_late(void)
278 exynos_pm_late_initcall();
284 * register the standard cpu IO areas
287 void __init exynos_init_io(struct map_desc *mach_desc, int size)
289 /* initialize the io descriptors we need for initialization */
290 iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));
292 iotable_init(mach_desc, size);
294 /* detect cpu id and rev. */
295 s5p_init_cpu(S5P_VA_CHIPID);
297 s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
300 static void __init exynos4_map_io(void)
302 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
304 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
305 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
307 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
309 /* initialize device information early */
310 exynos4_default_sdhci0();
311 exynos4_default_sdhci1();
312 exynos4_default_sdhci2();
313 exynos4_default_sdhci3();
315 s3c_adc_setname("samsung-adc-v3");
317 s3c_fimc_setname(0, "exynos4-fimc");
318 s3c_fimc_setname(1, "exynos4-fimc");
319 s3c_fimc_setname(2, "exynos4-fimc");
320 s3c_fimc_setname(3, "exynos4-fimc");
322 s3c_sdhci_setname(0, "exynos4-sdhci");
323 s3c_sdhci_setname(1, "exynos4-sdhci");
324 s3c_sdhci_setname(2, "exynos4-sdhci");
325 s3c_sdhci_setname(3, "exynos4-sdhci");
327 /* The I2C bus controllers are directly compatible with s3c2440 */
328 s3c_i2c0_setname("s3c2440-i2c");
329 s3c_i2c1_setname("s3c2440-i2c");
330 s3c_i2c2_setname("s3c2440-i2c");
332 s5p_fb_setname(0, "exynos4-fb");
333 s5p_hdmi_setname("exynos4-hdmi");
335 s3c64xx_spi_setname("exynos4210-spi");
338 static void __init exynos5_map_io(void)
340 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
343 static void __init exynos4_init_clocks(int xtal)
345 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
347 s3c24xx_register_baseclocks(xtal);
348 s5p_register_clocks(xtal);
350 if (soc_is_exynos4210())
351 exynos4210_register_clocks();
352 else if (soc_is_exynos4212() || soc_is_exynos4412())
353 exynos4212_register_clocks();
355 exynos4_register_clocks();
356 exynos4_setup_clocks();
359 static void __init exynos5_init_clocks(int xtal)
361 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
363 s3c24xx_register_baseclocks(xtal);
364 s5p_register_clocks(xtal);
366 exynos5_register_clocks();
367 exynos5_setup_clocks();
370 #define COMBINER_ENABLE_SET 0x0
371 #define COMBINER_ENABLE_CLEAR 0x4
372 #define COMBINER_INT_STATUS 0xC
374 static DEFINE_SPINLOCK(irq_controller_lock);
376 struct combiner_chip_data {
377 unsigned int irq_offset;
378 unsigned int irq_mask;
382 static struct irq_domain *combiner_irq_domain;
383 static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
385 static inline void __iomem *combiner_base(struct irq_data *data)
387 struct combiner_chip_data *combiner_data =
388 irq_data_get_irq_chip_data(data);
390 return combiner_data->base;
393 static void combiner_mask_irq(struct irq_data *data)
395 u32 mask = 1 << (data->hwirq % 32);
397 __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
400 static void combiner_unmask_irq(struct irq_data *data)
402 u32 mask = 1 << (data->hwirq % 32);
404 __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
407 static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
409 struct combiner_chip_data *chip_data = irq_get_handler_data(irq);
410 struct irq_chip *chip = irq_get_chip(irq);
411 unsigned int cascade_irq, combiner_irq;
412 unsigned long status;
414 chained_irq_enter(chip, desc);
416 spin_lock(&irq_controller_lock);
417 status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
418 spin_unlock(&irq_controller_lock);
419 status &= chip_data->irq_mask;
424 combiner_irq = __ffs(status);
426 cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
427 if (unlikely(cascade_irq >= NR_IRQS))
428 do_bad_IRQ(cascade_irq, desc);
430 generic_handle_irq(cascade_irq);
433 chained_irq_exit(chip, desc);
436 static struct irq_chip combiner_chip = {
438 .irq_mask = combiner_mask_irq,
439 .irq_unmask = combiner_unmask_irq,
442 static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
446 if (soc_is_exynos5250())
447 max_nr = EXYNOS5_MAX_COMBINER_NR;
449 max_nr = EXYNOS4_MAX_COMBINER_NR;
451 if (combiner_nr >= max_nr)
453 if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
455 irq_set_chained_handler(irq, combiner_handle_cascade_irq);
458 static void __init combiner_init_one(unsigned int combiner_nr,
461 combiner_data[combiner_nr].base = base;
462 combiner_data[combiner_nr].irq_offset = irq_find_mapping(
463 combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER);
464 combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
466 /* Disable all interrupts */
467 __raw_writel(combiner_data[combiner_nr].irq_mask,
468 base + COMBINER_ENABLE_CLEAR);
472 static int combiner_irq_domain_xlate(struct irq_domain *d,
473 struct device_node *controller,
474 const u32 *intspec, unsigned int intsize,
475 unsigned long *out_hwirq,
476 unsigned int *out_type)
478 if (d->of_node != controller)
484 *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1];
490 static int combiner_irq_domain_xlate(struct irq_domain *d,
491 struct device_node *controller,
492 const u32 *intspec, unsigned int intsize,
493 unsigned long *out_hwirq,
494 unsigned int *out_type)
500 static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq,
503 irq_set_chip_and_handler(irq, &combiner_chip, handle_level_irq);
504 irq_set_chip_data(irq, &combiner_data[hw >> 3]);
505 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
510 static struct irq_domain_ops combiner_irq_domain_ops = {
511 .xlate = combiner_irq_domain_xlate,
512 .map = combiner_irq_domain_map,
515 static void __init combiner_init(void __iomem *combiner_base,
516 struct device_node *np)
518 int i, irq, irq_base;
519 unsigned int max_nr, nr_irq;
522 if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
523 pr_warning("%s: number of combiners not specified, "
524 "setting default as %d.\n",
525 __func__, EXYNOS4_MAX_COMBINER_NR);
526 max_nr = EXYNOS4_MAX_COMBINER_NR;
529 max_nr = soc_is_exynos5250() ? EXYNOS5_MAX_COMBINER_NR :
530 EXYNOS4_MAX_COMBINER_NR;
532 nr_irq = max_nr * MAX_IRQ_IN_COMBINER;
534 irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0);
535 if (IS_ERR_VALUE(irq_base)) {
536 irq_base = COMBINER_IRQ(0, 0);
537 pr_warning("%s: irq desc alloc failed. Continuing with %d as linux irq base\n", __func__, irq_base);
540 combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0,
541 &combiner_irq_domain_ops, &combiner_data);
542 if (WARN_ON(!combiner_irq_domain)) {
543 pr_warning("%s: irq domain init failed\n", __func__);
547 for (i = 0; i < max_nr; i++) {
548 combiner_init_one(i, combiner_base + (i >> 2) * 0x10);
552 irq = irq_of_parse_and_map(np, i);
554 combiner_cascade_irq(i, irq);
559 static int __init combiner_of_init(struct device_node *np,
560 struct device_node *parent)
562 void __iomem *combiner_base;
564 combiner_base = of_iomap(np, 0);
565 if (!combiner_base) {
566 pr_err("%s: failed to map combiner registers\n", __func__);
570 combiner_init(combiner_base, np);
575 static const struct of_device_id exynos4_dt_irq_match[] = {
576 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
577 { .compatible = "samsung,exynos4210-combiner",
578 .data = combiner_of_init, },
583 void __init exynos4_init_irq(void)
585 unsigned int gic_bank_offset;
587 gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
589 if (!of_have_populated_dt())
590 gic_init_bases(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU, gic_bank_offset, NULL);
593 of_irq_init(exynos4_dt_irq_match);
596 if (!of_have_populated_dt())
597 combiner_init(S5P_VA_COMBINER_BASE, NULL);
600 * The parameters of s5p_init_irq() are for VIC init.
601 * Theses parameters should be NULL and 0 because EXYNOS4
602 * uses GIC instead of VIC.
604 s5p_init_irq(NULL, 0);
607 void __init exynos5_init_irq(void)
610 of_irq_init(exynos4_dt_irq_match);
613 * The parameters of s5p_init_irq() are for VIC init.
614 * Theses parameters should be NULL and 0 because EXYNOS4
615 * uses GIC instead of VIC.
617 s5p_init_irq(NULL, 0);
619 gic_arch_extn.irq_set_wake = s3c_irq_wake;
622 struct bus_type exynos_subsys = {
623 .name = "exynos-core",
624 .dev_name = "exynos-core",
627 static struct device exynos4_dev = {
628 .bus = &exynos_subsys,
631 static int __init exynos_core_init(void)
633 return subsys_system_register(&exynos_subsys, NULL);
635 core_initcall(exynos_core_init);
637 #ifdef CONFIG_CACHE_L2X0
638 static int __init exynos4_l2x0_cache_init(void)
642 if (soc_is_exynos5250())
645 ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
647 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
648 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
652 if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) {
653 l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC;
654 /* TAG, Data Latency Control: 2 cycles */
655 l2x0_saved_regs.tag_latency = 0x110;
657 if (soc_is_exynos4212() || soc_is_exynos4412())
658 l2x0_saved_regs.data_latency = 0x120;
660 l2x0_saved_regs.data_latency = 0x110;
662 l2x0_saved_regs.prefetch_ctrl = 0x30000007;
663 l2x0_saved_regs.pwr_ctrl =
664 (L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN);
666 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
668 __raw_writel(l2x0_saved_regs.tag_latency,
669 S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
670 __raw_writel(l2x0_saved_regs.data_latency,
671 S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
673 /* L2X0 Prefetch Control */
674 __raw_writel(l2x0_saved_regs.prefetch_ctrl,
675 S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
677 /* L2X0 Power Control */
678 __raw_writel(l2x0_saved_regs.pwr_ctrl,
679 S5P_VA_L2CC + L2X0_POWER_CTRL);
681 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
682 clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs));
685 l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK);
688 early_initcall(exynos4_l2x0_cache_init);
691 static int __init exynos_init(void)
693 printk(KERN_INFO "EXYNOS: Initializing architecture\n");
695 return device_register(&exynos4_dev);
698 /* uart registration process */
700 static void __init exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no)
702 struct s3c2410_uartcfg *tcfg = cfg;
705 for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
706 tcfg->has_fracval = 1;
708 s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no);
711 static void __iomem *exynos_eint_base;
713 static DEFINE_SPINLOCK(eint_lock);
715 static unsigned int eint0_15_data[16];
717 static inline int exynos4_irq_to_gpio(unsigned int irq)
719 if (irq < IRQ_EINT(0))
724 return EXYNOS4_GPX0(irq);
728 return EXYNOS4_GPX1(irq);
732 return EXYNOS4_GPX2(irq);
736 return EXYNOS4_GPX3(irq);
741 static inline int exynos5_irq_to_gpio(unsigned int irq)
743 if (irq < IRQ_EINT(0))
748 return EXYNOS5_GPX0(irq);
752 return EXYNOS5_GPX1(irq);
756 return EXYNOS5_GPX2(irq);
760 return EXYNOS5_GPX3(irq);
765 static unsigned int exynos4_eint0_15_src_int[16] = {
784 static unsigned int exynos5_eint0_15_src_int[16] = {
802 static inline void exynos_irq_eint_mask(struct irq_data *data)
806 spin_lock(&eint_lock);
807 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
808 mask |= EINT_OFFSET_BIT(data->irq);
809 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
810 spin_unlock(&eint_lock);
813 static void exynos_irq_eint_unmask(struct irq_data *data)
817 spin_lock(&eint_lock);
818 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
819 mask &= ~(EINT_OFFSET_BIT(data->irq));
820 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
821 spin_unlock(&eint_lock);
824 static inline void exynos_irq_eint_ack(struct irq_data *data)
826 __raw_writel(EINT_OFFSET_BIT(data->irq),
827 EINT_PEND(exynos_eint_base, data->irq));
830 static void exynos_irq_eint_maskack(struct irq_data *data)
832 exynos_irq_eint_mask(data);
833 exynos_irq_eint_ack(data);
836 static int exynos_irq_eint_set_type(struct irq_data *data, unsigned int type)
838 int offs = EINT_OFFSET(data->irq);
844 case IRQ_TYPE_EDGE_RISING:
845 newvalue = S5P_IRQ_TYPE_EDGE_RISING;
848 case IRQ_TYPE_EDGE_FALLING:
849 newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
852 case IRQ_TYPE_EDGE_BOTH:
853 newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
856 case IRQ_TYPE_LEVEL_LOW:
857 newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
860 case IRQ_TYPE_LEVEL_HIGH:
861 newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
865 printk(KERN_ERR "No such irq type %d", type);
869 shift = (offs & 0x7) * 4;
872 spin_lock(&eint_lock);
873 ctrl = __raw_readl(EINT_CON(exynos_eint_base, data->irq));
875 ctrl |= newvalue << shift;
876 __raw_writel(ctrl, EINT_CON(exynos_eint_base, data->irq));
877 spin_unlock(&eint_lock);
879 if (soc_is_exynos5250())
880 s3c_gpio_cfgpin(exynos5_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
882 s3c_gpio_cfgpin(exynos4_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
887 static struct irq_chip exynos_irq_eint = {
888 .name = "exynos-eint",
889 .irq_mask = exynos_irq_eint_mask,
890 .irq_unmask = exynos_irq_eint_unmask,
891 .irq_mask_ack = exynos_irq_eint_maskack,
892 .irq_ack = exynos_irq_eint_ack,
893 .irq_set_type = exynos_irq_eint_set_type,
895 .irq_set_wake = s3c_irqext_wake,
900 * exynos4_irq_demux_eint
902 * This function demuxes the IRQ from from EINTs 16 to 31.
903 * It is designed to be inlined into the specific handler
904 * s5p_irq_demux_eintX_Y.
906 * Each EINT pend/mask registers handle eight of them.
908 static inline void exynos_irq_demux_eint(unsigned int start)
912 u32 status = __raw_readl(EINT_PEND(exynos_eint_base, start));
913 u32 mask = __raw_readl(EINT_MASK(exynos_eint_base, start));
919 irq = fls(status) - 1;
920 generic_handle_irq(irq + start);
921 status &= ~(1 << irq);
925 static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
927 struct irq_chip *chip = irq_get_chip(irq);
928 chained_irq_enter(chip, desc);
929 exynos_irq_demux_eint(IRQ_EINT(16));
930 exynos_irq_demux_eint(IRQ_EINT(24));
931 chained_irq_exit(chip, desc);
934 static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
936 u32 *irq_data = irq_get_handler_data(irq);
937 struct irq_chip *chip = irq_get_chip(irq);
939 chained_irq_enter(chip, desc);
940 generic_handle_irq(*irq_data);
941 chained_irq_exit(chip, desc);
944 static int __init exynos_init_irq_eint(void)
948 #ifdef CONFIG_PINCTRL_SAMSUNG
950 * The Samsung pinctrl driver provides an integrated gpio/pinmux/pinconf
951 * functionality along with support for external gpio and wakeup
952 * interrupts. If the samsung pinctrl driver is enabled and includes
953 * the wakeup interrupt support, then the setting up external wakeup
954 * interrupts here can be skipped. This check here is temporary to
955 * allow exynos4 platforms that do not use Samsung pinctrl driver to
956 * co-exist with platforms that do. When all of the Samsung Exynos4
957 * platforms switch over to using the pinctrl driver, the wakeup
958 * interrupt support code here can be completely removed.
960 static const struct of_device_id exynos_pinctrl_ids[] = {
961 { .compatible = "samsung,pinctrl-exynos4210", },
962 { .compatible = "samsung,pinctrl-exynos4x12", },
964 struct device_node *pctrl_np, *wkup_np;
965 const char *wkup_compat = "samsung,exynos4210-wakeup-eint";
967 for_each_matching_node(pctrl_np, exynos_pinctrl_ids) {
968 if (of_device_is_available(pctrl_np)) {
969 wkup_np = of_find_compatible_node(pctrl_np, NULL,
977 if (soc_is_exynos5250())
978 exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
980 exynos_eint_base = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
982 if (exynos_eint_base == NULL) {
983 pr_err("unable to ioremap for EINT base address\n");
987 for (irq = 0 ; irq <= 31 ; irq++) {
988 irq_set_chip_and_handler(IRQ_EINT(irq), &exynos_irq_eint,
990 set_irq_flags(IRQ_EINT(irq), IRQF_VALID);
993 irq_set_chained_handler(EXYNOS_IRQ_EINT16_31, exynos_irq_demux_eint16_31);
995 for (irq = 0 ; irq <= 15 ; irq++) {
996 eint0_15_data[irq] = IRQ_EINT(irq);
998 if (soc_is_exynos5250()) {
999 irq_set_handler_data(exynos5_eint0_15_src_int[irq],
1000 &eint0_15_data[irq]);
1001 irq_set_chained_handler(exynos5_eint0_15_src_int[irq],
1002 exynos_irq_eint0_15);
1004 irq_set_handler_data(exynos4_eint0_15_src_int[irq],
1005 &eint0_15_data[irq]);
1006 irq_set_chained_handler(exynos4_eint0_15_src_int[irq],
1007 exynos_irq_eint0_15);
1013 arch_initcall(exynos_init_irq_eint);