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>
23 #include <asm/proc-fns.h>
24 #include <asm/exception.h>
25 #include <asm/hardware/cache-l2x0.h>
26 #include <asm/hardware/gic.h>
27 #include <asm/mach/map.h>
28 #include <asm/mach/irq.h>
29 #include <asm/cacheflush.h>
31 #include <mach/regs-irq.h>
32 #include <mach/regs-pmu.h>
33 #include <mach/regs-gpio.h>
37 #include <plat/clock.h>
38 #include <plat/devs.h>
40 #include <plat/sdhci.h>
41 #include <plat/gpio-cfg.h>
42 #include <plat/adc-core.h>
43 #include <plat/fb-core.h>
44 #include <plat/fimc-core.h>
45 #include <plat/iic-core.h>
46 #include <plat/tv-core.h>
47 #include <plat/regs-serial.h>
50 #define L2_AUX_VAL 0x7C470001
51 #define L2_AUX_MASK 0xC200ffff
53 static const char name_exynos4210[] = "EXYNOS4210";
54 static const char name_exynos4212[] = "EXYNOS4212";
55 static const char name_exynos4412[] = "EXYNOS4412";
56 static const char name_exynos5250[] = "EXYNOS5250";
58 static void exynos4_map_io(void);
59 static void exynos5_map_io(void);
60 static void exynos4_init_clocks(int xtal);
61 static void exynos5_init_clocks(int xtal);
62 static void exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no);
63 static int exynos_init(void);
65 static struct cpu_table cpu_ids[] __initdata = {
67 .idcode = EXYNOS4210_CPU_ID,
68 .idmask = EXYNOS4_CPU_MASK,
69 .map_io = exynos4_map_io,
70 .init_clocks = exynos4_init_clocks,
71 .init_uarts = exynos_init_uarts,
73 .name = name_exynos4210,
75 .idcode = EXYNOS4212_CPU_ID,
76 .idmask = EXYNOS4_CPU_MASK,
77 .map_io = exynos4_map_io,
78 .init_clocks = exynos4_init_clocks,
79 .init_uarts = exynos_init_uarts,
81 .name = name_exynos4212,
83 .idcode = EXYNOS4412_CPU_ID,
84 .idmask = EXYNOS4_CPU_MASK,
85 .map_io = exynos4_map_io,
86 .init_clocks = exynos4_init_clocks,
87 .init_uarts = exynos_init_uarts,
89 .name = name_exynos4412,
91 .idcode = EXYNOS5250_SOC_ID,
92 .idmask = EXYNOS5_SOC_MASK,
93 .map_io = exynos5_map_io,
94 .init_clocks = exynos5_init_clocks,
95 .init_uarts = exynos_init_uarts,
97 .name = name_exynos5250,
101 /* Initial IO mappings */
103 static struct map_desc exynos_iodesc[] __initdata = {
105 .virtual = (unsigned long)S5P_VA_CHIPID,
106 .pfn = __phys_to_pfn(EXYNOS_PA_CHIPID),
112 static struct map_desc exynos4_iodesc[] __initdata = {
114 .virtual = (unsigned long)S3C_VA_SYS,
115 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
119 .virtual = (unsigned long)S3C_VA_TIMER,
120 .pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
124 .virtual = (unsigned long)S3C_VA_WATCHDOG,
125 .pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
129 .virtual = (unsigned long)S5P_VA_SROMC,
130 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
134 .virtual = (unsigned long)S5P_VA_SYSTIMER,
135 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
139 .virtual = (unsigned long)S5P_VA_PMU,
140 .pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
144 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
145 .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
149 .virtual = (unsigned long)S5P_VA_GIC_CPU,
150 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
154 .virtual = (unsigned long)S5P_VA_GIC_DIST,
155 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
159 .virtual = (unsigned long)S3C_VA_UART,
160 .pfn = __phys_to_pfn(EXYNOS4_PA_UART),
164 .virtual = (unsigned long)S5P_VA_CMU,
165 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
169 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
170 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
174 .virtual = (unsigned long)S5P_VA_L2CC,
175 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
179 .virtual = (unsigned long)S5P_VA_DMC0,
180 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
184 .virtual = (unsigned long)S5P_VA_DMC1,
185 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
189 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
190 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
196 static struct map_desc exynos4_iodesc0[] __initdata = {
198 .virtual = (unsigned long)S5P_VA_SYSRAM,
199 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
205 static struct map_desc exynos4_iodesc1[] __initdata = {
207 .virtual = (unsigned long)S5P_VA_SYSRAM,
208 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
214 static struct map_desc exynos5_iodesc[] __initdata = {
216 .virtual = (unsigned long)S3C_VA_SYS,
217 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
221 .virtual = (unsigned long)S3C_VA_TIMER,
222 .pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
226 .virtual = (unsigned long)S3C_VA_WATCHDOG,
227 .pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
231 .virtual = (unsigned long)S5P_VA_SROMC,
232 .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
236 .virtual = (unsigned long)S5P_VA_SYSTIMER,
237 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSTIMER),
241 .virtual = (unsigned long)S5P_VA_SYSRAM,
242 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
246 .virtual = (unsigned long)S5P_VA_CMU,
247 .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
248 .length = 144 * SZ_1K,
251 .virtual = (unsigned long)S5P_VA_PMU,
252 .pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
256 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
257 .pfn = __phys_to_pfn(EXYNOS5_PA_COMBINER),
261 .virtual = (unsigned long)S3C_VA_UART,
262 .pfn = __phys_to_pfn(EXYNOS5_PA_UART),
266 .virtual = (unsigned long)S5P_VA_GIC_CPU,
267 .pfn = __phys_to_pfn(EXYNOS5_PA_GIC_CPU),
271 .virtual = (unsigned long)S5P_VA_GIC_DIST,
272 .pfn = __phys_to_pfn(EXYNOS5_PA_GIC_DIST),
278 void exynos4_restart(char mode, const char *cmd)
280 __raw_writel(0x1, S5P_SWRESET);
283 void exynos5_restart(char mode, const char *cmd)
285 __raw_writel(0x1, EXYNOS_SWRESET);
291 * register the standard cpu IO areas
294 void __init exynos_init_io(struct map_desc *mach_desc, int size)
296 /* initialize the io descriptors we need for initialization */
297 iotable_init(exynos_iodesc, ARRAY_SIZE(exynos_iodesc));
299 iotable_init(mach_desc, size);
301 /* detect cpu id and rev. */
302 s5p_init_cpu(S5P_VA_CHIPID);
304 s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
307 static void __init exynos4_map_io(void)
309 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
311 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
312 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
314 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
316 /* initialize device information early */
317 exynos4_default_sdhci0();
318 exynos4_default_sdhci1();
319 exynos4_default_sdhci2();
320 exynos4_default_sdhci3();
322 s3c_adc_setname("samsung-adc-v3");
324 s3c_fimc_setname(0, "exynos4-fimc");
325 s3c_fimc_setname(1, "exynos4-fimc");
326 s3c_fimc_setname(2, "exynos4-fimc");
327 s3c_fimc_setname(3, "exynos4-fimc");
329 /* The I2C bus controllers are directly compatible with s3c2440 */
330 s3c_i2c0_setname("s3c2440-i2c");
331 s3c_i2c1_setname("s3c2440-i2c");
332 s3c_i2c2_setname("s3c2440-i2c");
334 s5p_fb_setname(0, "exynos4-fb");
335 s5p_hdmi_setname("exynos4-hdmi");
338 static void __init exynos5_map_io(void)
340 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
342 s3c_device_i2c0.resource[0].start = EXYNOS5_PA_IIC(0);
343 s3c_device_i2c0.resource[0].end = EXYNOS5_PA_IIC(0) + SZ_4K - 1;
344 s3c_device_i2c0.resource[1].start = EXYNOS5_IRQ_IIC;
345 s3c_device_i2c0.resource[1].end = EXYNOS5_IRQ_IIC;
347 /* The I2C bus controllers are directly compatible with s3c2440 */
348 s3c_i2c0_setname("s3c2440-i2c");
349 s3c_i2c1_setname("s3c2440-i2c");
350 s3c_i2c2_setname("s3c2440-i2c");
353 static void __init exynos4_init_clocks(int xtal)
355 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
357 s3c24xx_register_baseclocks(xtal);
358 s5p_register_clocks(xtal);
360 if (soc_is_exynos4210())
361 exynos4210_register_clocks();
362 else if (soc_is_exynos4212() || soc_is_exynos4412())
363 exynos4212_register_clocks();
365 exynos4_register_clocks();
366 exynos4_setup_clocks();
369 static void __init exynos5_init_clocks(int xtal)
371 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
373 s3c24xx_register_baseclocks(xtal);
374 s5p_register_clocks(xtal);
376 exynos5_register_clocks();
377 exynos5_setup_clocks();
380 #define COMBINER_ENABLE_SET 0x0
381 #define COMBINER_ENABLE_CLEAR 0x4
382 #define COMBINER_INT_STATUS 0xC
384 static DEFINE_SPINLOCK(irq_controller_lock);
386 struct combiner_chip_data {
387 unsigned int irq_offset;
388 unsigned int irq_mask;
392 static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
394 static inline void __iomem *combiner_base(struct irq_data *data)
396 struct combiner_chip_data *combiner_data =
397 irq_data_get_irq_chip_data(data);
399 return combiner_data->base;
402 static void combiner_mask_irq(struct irq_data *data)
404 u32 mask = 1 << (data->irq % 32);
406 __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
409 static void combiner_unmask_irq(struct irq_data *data)
411 u32 mask = 1 << (data->irq % 32);
413 __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
416 static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
418 struct combiner_chip_data *chip_data = irq_get_handler_data(irq);
419 struct irq_chip *chip = irq_get_chip(irq);
420 unsigned int cascade_irq, combiner_irq;
421 unsigned long status;
423 chained_irq_enter(chip, desc);
425 spin_lock(&irq_controller_lock);
426 status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
427 spin_unlock(&irq_controller_lock);
428 status &= chip_data->irq_mask;
433 combiner_irq = __ffs(status);
435 cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
436 if (unlikely(cascade_irq >= NR_IRQS))
437 do_bad_IRQ(cascade_irq, desc);
439 generic_handle_irq(cascade_irq);
442 chained_irq_exit(chip, desc);
445 static struct irq_chip combiner_chip = {
447 .irq_mask = combiner_mask_irq,
448 .irq_unmask = combiner_unmask_irq,
451 static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
455 if (soc_is_exynos5250())
456 max_nr = EXYNOS5_MAX_COMBINER_NR;
458 max_nr = EXYNOS4_MAX_COMBINER_NR;
460 if (combiner_nr >= max_nr)
462 if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
464 irq_set_chained_handler(irq, combiner_handle_cascade_irq);
467 static void __init combiner_init(unsigned int combiner_nr, void __iomem *base,
468 unsigned int irq_start)
473 if (soc_is_exynos5250())
474 max_nr = EXYNOS5_MAX_COMBINER_NR;
476 max_nr = EXYNOS4_MAX_COMBINER_NR;
478 if (combiner_nr >= max_nr)
481 combiner_data[combiner_nr].base = base;
482 combiner_data[combiner_nr].irq_offset = irq_start;
483 combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
485 /* Disable all interrupts */
487 __raw_writel(combiner_data[combiner_nr].irq_mask,
488 base + COMBINER_ENABLE_CLEAR);
490 /* Setup the Linux IRQ subsystem */
492 for (i = irq_start; i < combiner_data[combiner_nr].irq_offset
493 + MAX_IRQ_IN_COMBINER; i++) {
494 irq_set_chip_and_handler(i, &combiner_chip, handle_level_irq);
495 irq_set_chip_data(i, &combiner_data[combiner_nr]);
496 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
501 static const struct of_device_id exynos4_dt_irq_match[] = {
502 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
507 void __init exynos4_init_irq(void)
510 unsigned int gic_bank_offset;
512 gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
514 if (!of_have_populated_dt())
515 gic_init_bases(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU, gic_bank_offset, NULL);
518 of_irq_init(exynos4_dt_irq_match);
521 for (irq = 0; irq < EXYNOS4_MAX_COMBINER_NR; irq++) {
523 combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
524 COMBINER_IRQ(irq, 0));
525 combiner_cascade_irq(irq, IRQ_SPI(irq));
529 * The parameters of s5p_init_irq() are for VIC init.
530 * Theses parameters should be NULL and 0 because EXYNOS4
531 * uses GIC instead of VIC.
533 s5p_init_irq(NULL, 0);
536 void __init exynos5_init_irq(void)
540 gic_init(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
542 for (irq = 0; irq < EXYNOS5_MAX_COMBINER_NR; irq++) {
543 combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
544 COMBINER_IRQ(irq, 0));
545 combiner_cascade_irq(irq, IRQ_SPI(irq));
549 * The parameters of s5p_init_irq() are for VIC init.
550 * Theses parameters should be NULL and 0 because EXYNOS4
551 * uses GIC instead of VIC.
553 s5p_init_irq(NULL, 0);
556 struct bus_type exynos4_subsys = {
557 .name = "exynos4-core",
558 .dev_name = "exynos4-core",
561 struct bus_type exynos5_subsys = {
562 .name = "exynos5-core",
563 .dev_name = "exynos5-core",
566 static struct device exynos4_dev = {
567 .bus = &exynos4_subsys,
570 static struct device exynos5_dev = {
571 .bus = &exynos5_subsys,
574 static int __init exynos_core_init(void)
576 if (soc_is_exynos5250())
577 return subsys_system_register(&exynos5_subsys, NULL);
579 return subsys_system_register(&exynos4_subsys, NULL);
581 core_initcall(exynos_core_init);
583 #ifdef CONFIG_CACHE_L2X0
584 static int __init exynos4_l2x0_cache_init(void)
586 if (soc_is_exynos5250())
590 ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
592 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
593 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
597 if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) {
598 l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC;
599 /* TAG, Data Latency Control: 2 cycles */
600 l2x0_saved_regs.tag_latency = 0x110;
602 if (soc_is_exynos4212() || soc_is_exynos4412())
603 l2x0_saved_regs.data_latency = 0x120;
605 l2x0_saved_regs.data_latency = 0x110;
607 l2x0_saved_regs.prefetch_ctrl = 0x30000007;
608 l2x0_saved_regs.pwr_ctrl =
609 (L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN);
611 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
613 __raw_writel(l2x0_saved_regs.tag_latency,
614 S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
615 __raw_writel(l2x0_saved_regs.data_latency,
616 S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
618 /* L2X0 Prefetch Control */
619 __raw_writel(l2x0_saved_regs.prefetch_ctrl,
620 S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
622 /* L2X0 Power Control */
623 __raw_writel(l2x0_saved_regs.pwr_ctrl,
624 S5P_VA_L2CC + L2X0_POWER_CTRL);
626 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
627 clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs));
630 l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK);
633 early_initcall(exynos4_l2x0_cache_init);
636 static int __init exynos5_l2_cache_init(void)
640 if (!soc_is_exynos5250())
643 asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
644 "bic %0, %0, #(1 << 2)\n" /* cache disable */
645 "mcr p15, 0, %0, c1, c0, 0\n"
646 "mrc p15, 1, %0, c9, c0, 2\n"
649 val |= (1 << 9) | (1 << 5) | (2 << 6) | (2 << 0);
651 asm volatile("mcr p15, 1, %0, c9, c0, 2\n" : : "r"(val));
652 asm volatile("mrc p15, 0, %0, c1, c0, 0\n"
653 "orr %0, %0, #(1 << 2)\n" /* cache enable */
654 "mcr p15, 0, %0, c1, c0, 0\n"
659 early_initcall(exynos5_l2_cache_init);
661 static int __init exynos_init(void)
663 printk(KERN_INFO "EXYNOS: Initializing architecture\n");
665 if (soc_is_exynos5250())
666 return device_register(&exynos5_dev);
668 return device_register(&exynos4_dev);
671 /* uart registration process */
673 static void __init exynos_init_uarts(struct s3c2410_uartcfg *cfg, int no)
675 struct s3c2410_uartcfg *tcfg = cfg;
678 for (ucnt = 0; ucnt < no; ucnt++, tcfg++)
679 tcfg->has_fracval = 1;
681 if (soc_is_exynos5250())
682 s3c24xx_init_uartdevs("exynos4210-uart", exynos5_uart_resources, cfg, no);
684 s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no);
687 static void __iomem *exynos_eint_base;
689 static DEFINE_SPINLOCK(eint_lock);
691 static unsigned int eint0_15_data[16];
693 static inline int exynos4_irq_to_gpio(unsigned int irq)
695 if (irq < IRQ_EINT(0))
700 return EXYNOS4_GPX0(irq);
704 return EXYNOS4_GPX1(irq);
708 return EXYNOS4_GPX2(irq);
712 return EXYNOS4_GPX3(irq);
717 static inline int exynos5_irq_to_gpio(unsigned int irq)
719 if (irq < IRQ_EINT(0))
724 return EXYNOS5_GPX0(irq);
728 return EXYNOS5_GPX1(irq);
732 return EXYNOS5_GPX2(irq);
736 return EXYNOS5_GPX3(irq);
741 static unsigned int exynos4_eint0_15_src_int[16] = {
760 static unsigned int exynos5_eint0_15_src_int[16] = {
778 static inline void exynos_irq_eint_mask(struct irq_data *data)
782 spin_lock(&eint_lock);
783 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
784 mask |= EINT_OFFSET_BIT(data->irq);
785 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
786 spin_unlock(&eint_lock);
789 static void exynos_irq_eint_unmask(struct irq_data *data)
793 spin_lock(&eint_lock);
794 mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq));
795 mask &= ~(EINT_OFFSET_BIT(data->irq));
796 __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq));
797 spin_unlock(&eint_lock);
800 static inline void exynos_irq_eint_ack(struct irq_data *data)
802 __raw_writel(EINT_OFFSET_BIT(data->irq),
803 EINT_PEND(exynos_eint_base, data->irq));
806 static void exynos_irq_eint_maskack(struct irq_data *data)
808 exynos_irq_eint_mask(data);
809 exynos_irq_eint_ack(data);
812 static int exynos_irq_eint_set_type(struct irq_data *data, unsigned int type)
814 int offs = EINT_OFFSET(data->irq);
820 case IRQ_TYPE_EDGE_RISING:
821 newvalue = S5P_IRQ_TYPE_EDGE_RISING;
824 case IRQ_TYPE_EDGE_FALLING:
825 newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
828 case IRQ_TYPE_EDGE_BOTH:
829 newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
832 case IRQ_TYPE_LEVEL_LOW:
833 newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
836 case IRQ_TYPE_LEVEL_HIGH:
837 newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
841 printk(KERN_ERR "No such irq type %d", type);
845 shift = (offs & 0x7) * 4;
848 spin_lock(&eint_lock);
849 ctrl = __raw_readl(EINT_CON(exynos_eint_base, data->irq));
851 ctrl |= newvalue << shift;
852 __raw_writel(ctrl, EINT_CON(exynos_eint_base, data->irq));
853 spin_unlock(&eint_lock);
855 if (soc_is_exynos5250())
856 s3c_gpio_cfgpin(exynos5_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
858 s3c_gpio_cfgpin(exynos4_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf));
863 static struct irq_chip exynos_irq_eint = {
864 .name = "exynos-eint",
865 .irq_mask = exynos_irq_eint_mask,
866 .irq_unmask = exynos_irq_eint_unmask,
867 .irq_mask_ack = exynos_irq_eint_maskack,
868 .irq_ack = exynos_irq_eint_ack,
869 .irq_set_type = exynos_irq_eint_set_type,
871 .irq_set_wake = s3c_irqext_wake,
876 * exynos4_irq_demux_eint
878 * This function demuxes the IRQ from from EINTs 16 to 31.
879 * It is designed to be inlined into the specific handler
880 * s5p_irq_demux_eintX_Y.
882 * Each EINT pend/mask registers handle eight of them.
884 static inline void exynos_irq_demux_eint(unsigned int start)
888 u32 status = __raw_readl(EINT_PEND(exynos_eint_base, start));
889 u32 mask = __raw_readl(EINT_MASK(exynos_eint_base, start));
895 irq = fls(status) - 1;
896 generic_handle_irq(irq + start);
897 status &= ~(1 << irq);
901 static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
903 struct irq_chip *chip = irq_get_chip(irq);
904 chained_irq_enter(chip, desc);
905 exynos_irq_demux_eint(IRQ_EINT(16));
906 exynos_irq_demux_eint(IRQ_EINT(24));
907 chained_irq_exit(chip, desc);
910 static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
912 u32 *irq_data = irq_get_handler_data(irq);
913 struct irq_chip *chip = irq_get_chip(irq);
915 chained_irq_enter(chip, desc);
916 chip->irq_mask(&desc->irq_data);
919 chip->irq_ack(&desc->irq_data);
921 generic_handle_irq(*irq_data);
923 chip->irq_unmask(&desc->irq_data);
924 chained_irq_exit(chip, desc);
927 static int __init exynos_init_irq_eint(void)
931 if (soc_is_exynos5250())
932 exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
934 exynos_eint_base = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
936 if (exynos_eint_base == NULL) {
937 pr_err("unable to ioremap for EINT base address\n");
941 for (irq = 0 ; irq <= 31 ; irq++) {
942 irq_set_chip_and_handler(IRQ_EINT(irq), &exynos_irq_eint,
944 set_irq_flags(IRQ_EINT(irq), IRQF_VALID);
947 irq_set_chained_handler(EXYNOS_IRQ_EINT16_31, exynos_irq_demux_eint16_31);
949 for (irq = 0 ; irq <= 15 ; irq++) {
950 eint0_15_data[irq] = IRQ_EINT(irq);
952 if (soc_is_exynos5250()) {
953 irq_set_handler_data(exynos5_eint0_15_src_int[irq],
954 &eint0_15_data[irq]);
955 irq_set_chained_handler(exynos5_eint0_15_src_int[irq],
956 exynos_irq_eint0_15);
958 irq_set_handler_data(exynos4_eint0_15_src_int[irq],
959 &eint0_15_data[irq]);
960 irq_set_chained_handler(exynos4_eint0_15_src_int[irq],
961 exynos_irq_eint0_15);
967 arch_initcall(exynos_init_irq_eint);