/* * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. * http://www.samsung.com * * Common Codes for EXYNOS * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "common.h" #define L2_AUX_VAL 0x7C470001 #define L2_AUX_MASK 0xC200ffff static const char name_exynos4210[] = "EXYNOS4210"; static const char name_exynos4212[] = "EXYNOS4212"; static const char name_exynos4412[] = "EXYNOS4412"; static const char name_exynos5250[] = "EXYNOS5250"; static const char name_exynos5440[] = "EXYNOS5440"; static void exynos4_map_io(void); static void exynos5_map_io(void); static void exynos5440_map_io(void); static void exynos4_init_clocks(int xtal); static void exynos5_init_clocks(int xtal); static void exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no); static int exynos_init(void); static struct cpu_table cpu_ids[] __initdata = { { .idcode = EXYNOS4210_CPU_ID, .idmask = EXYNOS4_CPU_MASK, .map_io = exynos4_map_io, .init_clocks = exynos4_init_clocks, .init_uarts = exynos4_init_uarts, .init = exynos_init, .name = name_exynos4210, }, { .idcode = EXYNOS4212_CPU_ID, .idmask = EXYNOS4_CPU_MASK, .map_io = exynos4_map_io, .init_clocks = exynos4_init_clocks, .init_uarts = exynos4_init_uarts, .init = exynos_init, .name = name_exynos4212, }, { .idcode = EXYNOS4412_CPU_ID, .idmask = EXYNOS4_CPU_MASK, .map_io = exynos4_map_io, .init_clocks = exynos4_init_clocks, .init_uarts = exynos4_init_uarts, .init = exynos_init, .name = name_exynos4412, }, { .idcode = EXYNOS5250_SOC_ID, .idmask = EXYNOS5_SOC_MASK, .map_io = exynos5_map_io, .init_clocks = exynos5_init_clocks, .init = exynos_init, .name = name_exynos5250, }, { .idcode = EXYNOS5440_SOC_ID, .idmask = EXYNOS5_SOC_MASK, .map_io = exynos5440_map_io, .init = exynos_init, .name = name_exynos5440, }, }; /* Initial IO mappings */ static struct map_desc exynos_iodesc[] __initdata = { { .virtual = (unsigned long)S5P_VA_CHIPID, .pfn = __phys_to_pfn(EXYNOS_PA_CHIPID), .length = SZ_4K, .type = MT_DEVICE, }, }; #ifdef CONFIG_ARCH_EXYNOS5 static struct map_desc exynos5440_iodesc[] __initdata = { { .virtual = (unsigned long)S5P_VA_CHIPID, .pfn = __phys_to_pfn(EXYNOS5440_PA_CHIPID), .length = SZ_4K, .type = MT_DEVICE, }, }; #endif static struct map_desc exynos4_iodesc[] __initdata = { { .virtual = (unsigned long)S3C_VA_SYS, .pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_TIMER, .pfn = __phys_to_pfn(EXYNOS4_PA_TIMER), .length = SZ_16K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_WATCHDOG, .pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_SROMC, .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_SYSTIMER, .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_PMU, .pfn = __phys_to_pfn(EXYNOS4_PA_PMU), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_COMBINER_BASE, .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_GIC_CPU, .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_GIC_DIST, .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_UART, .pfn = __phys_to_pfn(EXYNOS4_PA_UART), .length = SZ_512K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_CMU, .pfn = __phys_to_pfn(EXYNOS4_PA_CMU), .length = SZ_128K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_COREPERI_BASE, .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI), .length = SZ_8K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_L2CC, .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_DMC0, .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_DMC1, .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_USB_HSPHY, .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY), .length = SZ_4K, .type = MT_DEVICE, }, }; static struct map_desc exynos4_iodesc0[] __initdata = { { .virtual = (unsigned long)S5P_VA_SYSRAM, .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0), .length = SZ_4K, .type = MT_DEVICE, }, }; static struct map_desc exynos4_iodesc1[] __initdata = { { .virtual = (unsigned long)S5P_VA_SYSRAM, .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1), .length = SZ_4K, .type = MT_DEVICE, }, }; static struct map_desc exynos5_iodesc[] __initdata = { { .virtual = (unsigned long)S3C_VA_SYS, .pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_TIMER, .pfn = __phys_to_pfn(EXYNOS5_PA_TIMER), .length = SZ_16K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_WATCHDOG, .pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_SROMC, .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_SYSTIMER, .pfn = __phys_to_pfn(EXYNOS5_PA_SYSTIMER), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_SYSRAM, .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM), .length = SZ_4K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_CMU, .pfn = __phys_to_pfn(EXYNOS5_PA_CMU), .length = 144 * SZ_1K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S5P_VA_PMU, .pfn = __phys_to_pfn(EXYNOS5_PA_PMU), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = (unsigned long)S3C_VA_UART, .pfn = __phys_to_pfn(EXYNOS5_PA_UART), .length = SZ_512K, .type = MT_DEVICE, }, }; static struct map_desc exynos5440_iodesc0[] __initdata = { { .virtual = (unsigned long)S3C_VA_UART, .pfn = __phys_to_pfn(EXYNOS5440_PA_UART0), .length = SZ_512K, .type = MT_DEVICE, }, }; void exynos4_restart(char mode, const char *cmd) { __raw_writel(0x1, S5P_SWRESET); } void exynos5_restart(char mode, const char *cmd) { u32 val; void __iomem *addr; if (of_machine_is_compatible("samsung,exynos5250")) { val = 0x1; addr = EXYNOS_SWRESET; } else if (of_machine_is_compatible("samsung,exynos5440")) { val = (0x10 << 20) | (0x1 << 16); addr = EXYNOS5440_SWRESET; } else { pr_err("%s: cannot support non-DT\n", __func__); return; } __raw_writel(val, addr); } void __init exynos_init_late(void) { if (of_machine_is_compatible("samsung,exynos5440")) /* to be supported later */ return; exynos_pm_late_initcall(); } /* * exynos_map_io * * register the standard cpu IO areas */ void __init exynos_init_io(struct map_desc *mach_desc, int size) { struct map_desc *iodesc = exynos_iodesc; int iodesc_sz = ARRAY_SIZE(exynos_iodesc); #if defined(CONFIG_OF) && defined(CONFIG_ARCH_EXYNOS5) unsigned long root = of_get_flat_dt_root(); /* initialize the io descriptors we need for initialization */ if (of_flat_dt_is_compatible(root, "samsung,exynos5440")) { iodesc = exynos5440_iodesc; iodesc_sz = ARRAY_SIZE(exynos5440_iodesc); } #endif iotable_init(iodesc, iodesc_sz); if (mach_desc) iotable_init(mach_desc, size); /* detect cpu id and rev. */ s5p_init_cpu(S5P_VA_CHIPID); s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids)); } static void __init exynos4_map_io(void) { iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc)); if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0) iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0)); else iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1)); /* initialize device information early */ exynos4_default_sdhci0(); exynos4_default_sdhci1(); exynos4_default_sdhci2(); exynos4_default_sdhci3(); s3c_adc_setname("samsung-adc-v3"); s3c_fimc_setname(0, "exynos4-fimc"); s3c_fimc_setname(1, "exynos4-fimc"); s3c_fimc_setname(2, "exynos4-fimc"); s3c_fimc_setname(3, "exynos4-fimc"); s3c_sdhci_setname(0, "exynos4-sdhci"); s3c_sdhci_setname(1, "exynos4-sdhci"); s3c_sdhci_setname(2, "exynos4-sdhci"); s3c_sdhci_setname(3, "exynos4-sdhci"); /* The I2C bus controllers are directly compatible with s3c2440 */ s3c_i2c0_setname("s3c2440-i2c"); s3c_i2c1_setname("s3c2440-i2c"); s3c_i2c2_setname("s3c2440-i2c"); s5p_fb_setname(0, "exynos4-fb"); s5p_hdmi_setname("exynos4-hdmi"); s3c64xx_spi_setname("exynos4210-spi"); } static void __init exynos5_map_io(void) { iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc)); } static void __init exynos4_init_clocks(int xtal) { printk(KERN_DEBUG "%s: initializing clocks\n", __func__); s3c24xx_register_baseclocks(xtal); s5p_register_clocks(xtal); if (soc_is_exynos4210()) exynos4210_register_clocks(); else if (soc_is_exynos4212() || soc_is_exynos4412()) exynos4212_register_clocks(); exynos4_register_clocks(); exynos4_setup_clocks(); } static void __init exynos5440_map_io(void) { iotable_init(exynos5440_iodesc0, ARRAY_SIZE(exynos5440_iodesc0)); } static void __init exynos5_init_clocks(int xtal) { printk(KERN_DEBUG "%s: initializing clocks\n", __func__); /* EXYNOS5440 can support only common clock framework */ if (soc_is_exynos5440()) return; #ifdef CONFIG_SOC_EXYNOS5250 s3c24xx_register_baseclocks(xtal); s5p_register_clocks(xtal); exynos5_register_clocks(); exynos5_setup_clocks(); #endif } #define COMBINER_ENABLE_SET 0x0 #define COMBINER_ENABLE_CLEAR 0x4 #define COMBINER_INT_STATUS 0xC static DEFINE_SPINLOCK(irq_controller_lock); struct combiner_chip_data { unsigned int irq_offset; unsigned int irq_mask; void __iomem *base; }; static struct irq_domain *combiner_irq_domain; static struct combiner_chip_data combiner_data[MAX_COMBINER_NR]; static inline void __iomem *combiner_base(struct irq_data *data) { struct combiner_chip_data *combiner_data = irq_data_get_irq_chip_data(data); return combiner_data->base; } static void combiner_mask_irq(struct irq_data *data) { u32 mask = 1 << (data->hwirq % 32); __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR); } static void combiner_unmask_irq(struct irq_data *data) { u32 mask = 1 << (data->hwirq % 32); __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET); } static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) { struct combiner_chip_data *chip_data = irq_get_handler_data(irq); struct irq_chip *chip = irq_get_chip(irq); unsigned int cascade_irq, combiner_irq; unsigned long status; chained_irq_enter(chip, desc); spin_lock(&irq_controller_lock); status = __raw_readl(chip_data->base + COMBINER_INT_STATUS); spin_unlock(&irq_controller_lock); status &= chip_data->irq_mask; if (status == 0) goto out; combiner_irq = __ffs(status); cascade_irq = combiner_irq + (chip_data->irq_offset & ~31); if (unlikely(cascade_irq >= NR_IRQS)) do_bad_IRQ(cascade_irq, desc); else generic_handle_irq(cascade_irq); out: chained_irq_exit(chip, desc); } static struct irq_chip combiner_chip = { .name = "COMBINER", .irq_mask = combiner_mask_irq, .irq_unmask = combiner_unmask_irq, }; static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq) { unsigned int max_nr; if (soc_is_exynos5250()) max_nr = EXYNOS5_MAX_COMBINER_NR; else max_nr = EXYNOS4_MAX_COMBINER_NR; if (combiner_nr >= max_nr) BUG(); if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0) BUG(); irq_set_chained_handler(irq, combiner_handle_cascade_irq); } static void __init combiner_init_one(unsigned int combiner_nr, void __iomem *base) { combiner_data[combiner_nr].base = base; combiner_data[combiner_nr].irq_offset = irq_find_mapping( combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER); combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3); /* Disable all interrupts */ __raw_writel(combiner_data[combiner_nr].irq_mask, base + COMBINER_ENABLE_CLEAR); } #ifdef CONFIG_OF static int combiner_irq_domain_xlate(struct irq_domain *d, struct device_node *controller, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { if (d->of_node != controller) return -EINVAL; if (intsize < 2) return -EINVAL; *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1]; *out_type = 0; return 0; } #else static int combiner_irq_domain_xlate(struct irq_domain *d, struct device_node *controller, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { return -EINVAL; } #endif static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { irq_set_chip_and_handler(irq, &combiner_chip, handle_level_irq); irq_set_chip_data(irq, &combiner_data[hw >> 3]); set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); return 0; } static struct irq_domain_ops combiner_irq_domain_ops = { .xlate = combiner_irq_domain_xlate, .map = combiner_irq_domain_map, }; static void __init combiner_init(void __iomem *combiner_base, struct device_node *np) { int i, irq, irq_base; unsigned int max_nr, nr_irq; if (np) { if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) { pr_warning("%s: number of combiners not specified, " "setting default as %d.\n", __func__, EXYNOS4_MAX_COMBINER_NR); max_nr = EXYNOS4_MAX_COMBINER_NR; } } else { max_nr = soc_is_exynos5250() ? EXYNOS5_MAX_COMBINER_NR : EXYNOS4_MAX_COMBINER_NR; } nr_irq = max_nr * MAX_IRQ_IN_COMBINER; irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0); if (IS_ERR_VALUE(irq_base)) { irq_base = COMBINER_IRQ(0, 0); pr_warning("%s: irq desc alloc failed. Continuing with %d as linux irq base\n", __func__, irq_base); } combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0, &combiner_irq_domain_ops, &combiner_data); if (WARN_ON(!combiner_irq_domain)) { pr_warning("%s: irq domain init failed\n", __func__); return; } for (i = 0; i < max_nr; i++) { combiner_init_one(i, combiner_base + (i >> 2) * 0x10); irq = IRQ_SPI(i); #ifdef CONFIG_OF if (np) irq = irq_of_parse_and_map(np, i); #endif combiner_cascade_irq(i, irq); } } #ifdef CONFIG_OF static int __init combiner_of_init(struct device_node *np, struct device_node *parent) { void __iomem *combiner_base; combiner_base = of_iomap(np, 0); if (!combiner_base) { pr_err("%s: failed to map combiner registers\n", __func__); return -ENXIO; } combiner_init(combiner_base, np); return 0; } static const struct of_device_id exynos_dt_irq_match[] = { { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, { .compatible = "arm,cortex-a15-gic", .data = gic_of_init, }, { .compatible = "samsung,exynos4210-combiner", .data = combiner_of_init, }, {}, }; #endif void __init exynos4_init_irq(void) { unsigned int gic_bank_offset; gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000; if (!of_have_populated_dt()) gic_init_bases(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU, gic_bank_offset, NULL); #ifdef CONFIG_OF else of_irq_init(exynos_dt_irq_match); #endif if (!of_have_populated_dt()) combiner_init(S5P_VA_COMBINER_BASE, NULL); /* * The parameters of s5p_init_irq() are for VIC init. * Theses parameters should be NULL and 0 because EXYNOS4 * uses GIC instead of VIC. */ s5p_init_irq(NULL, 0); } void __init exynos5_init_irq(void) { #ifdef CONFIG_OF of_irq_init(exynos_dt_irq_match); #endif /* * The parameters of s5p_init_irq() are for VIC init. * Theses parameters should be NULL and 0 because EXYNOS4 * uses GIC instead of VIC. */ if (!of_machine_is_compatible("samsung,exynos5440")) s5p_init_irq(NULL, 0); gic_arch_extn.irq_set_wake = s3c_irq_wake; } struct bus_type exynos_subsys = { .name = "exynos-core", .dev_name = "exynos-core", }; static struct device exynos4_dev = { .bus = &exynos_subsys, }; static int __init exynos_core_init(void) { return subsys_system_register(&exynos_subsys, NULL); } core_initcall(exynos_core_init); #ifdef CONFIG_CACHE_L2X0 static int __init exynos4_l2x0_cache_init(void) { int ret; if (soc_is_exynos5250() || soc_is_exynos5440()) return 0; ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK); if (!ret) { l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs); clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long)); return 0; } if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) { l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC; /* TAG, Data Latency Control: 2 cycles */ l2x0_saved_regs.tag_latency = 0x110; if (soc_is_exynos4212() || soc_is_exynos4412()) l2x0_saved_regs.data_latency = 0x120; else l2x0_saved_regs.data_latency = 0x110; l2x0_saved_regs.prefetch_ctrl = 0x30000007; l2x0_saved_regs.pwr_ctrl = (L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN); l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs); __raw_writel(l2x0_saved_regs.tag_latency, S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL); __raw_writel(l2x0_saved_regs.data_latency, S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL); /* L2X0 Prefetch Control */ __raw_writel(l2x0_saved_regs.prefetch_ctrl, S5P_VA_L2CC + L2X0_PREFETCH_CTRL); /* L2X0 Power Control */ __raw_writel(l2x0_saved_regs.pwr_ctrl, S5P_VA_L2CC + L2X0_POWER_CTRL); clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long)); clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs)); } l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK); return 0; } early_initcall(exynos4_l2x0_cache_init); #endif static int __init exynos_init(void) { printk(KERN_INFO "EXYNOS: Initializing architecture\n"); return device_register(&exynos4_dev); } /* uart registration process */ static void __init exynos4_init_uarts(struct s3c2410_uartcfg *cfg, int no) { struct s3c2410_uartcfg *tcfg = cfg; u32 ucnt; for (ucnt = 0; ucnt < no; ucnt++, tcfg++) tcfg->has_fracval = 1; s3c24xx_init_uartdevs("exynos4210-uart", exynos4_uart_resources, cfg, no); } static void __iomem *exynos_eint_base; static DEFINE_SPINLOCK(eint_lock); static unsigned int eint0_15_data[16]; static inline int exynos4_irq_to_gpio(unsigned int irq) { if (irq < IRQ_EINT(0)) return -EINVAL; irq -= IRQ_EINT(0); if (irq < 8) return EXYNOS4_GPX0(irq); irq -= 8; if (irq < 8) return EXYNOS4_GPX1(irq); irq -= 8; if (irq < 8) return EXYNOS4_GPX2(irq); irq -= 8; if (irq < 8) return EXYNOS4_GPX3(irq); return -EINVAL; } static inline int exynos5_irq_to_gpio(unsigned int irq) { if (irq < IRQ_EINT(0)) return -EINVAL; irq -= IRQ_EINT(0); if (irq < 8) return EXYNOS5_GPX0(irq); irq -= 8; if (irq < 8) return EXYNOS5_GPX1(irq); irq -= 8; if (irq < 8) return EXYNOS5_GPX2(irq); irq -= 8; if (irq < 8) return EXYNOS5_GPX3(irq); return -EINVAL; } static unsigned int exynos4_eint0_15_src_int[16] = { EXYNOS4_IRQ_EINT0, EXYNOS4_IRQ_EINT1, EXYNOS4_IRQ_EINT2, EXYNOS4_IRQ_EINT3, EXYNOS4_IRQ_EINT4, EXYNOS4_IRQ_EINT5, EXYNOS4_IRQ_EINT6, EXYNOS4_IRQ_EINT7, EXYNOS4_IRQ_EINT8, EXYNOS4_IRQ_EINT9, EXYNOS4_IRQ_EINT10, EXYNOS4_IRQ_EINT11, EXYNOS4_IRQ_EINT12, EXYNOS4_IRQ_EINT13, EXYNOS4_IRQ_EINT14, EXYNOS4_IRQ_EINT15, }; static unsigned int exynos5_eint0_15_src_int[16] = { EXYNOS5_IRQ_EINT0, EXYNOS5_IRQ_EINT1, EXYNOS5_IRQ_EINT2, EXYNOS5_IRQ_EINT3, EXYNOS5_IRQ_EINT4, EXYNOS5_IRQ_EINT5, EXYNOS5_IRQ_EINT6, EXYNOS5_IRQ_EINT7, EXYNOS5_IRQ_EINT8, EXYNOS5_IRQ_EINT9, EXYNOS5_IRQ_EINT10, EXYNOS5_IRQ_EINT11, EXYNOS5_IRQ_EINT12, EXYNOS5_IRQ_EINT13, EXYNOS5_IRQ_EINT14, EXYNOS5_IRQ_EINT15, }; static inline void exynos_irq_eint_mask(struct irq_data *data) { u32 mask; spin_lock(&eint_lock); mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq)); mask |= EINT_OFFSET_BIT(data->irq); __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq)); spin_unlock(&eint_lock); } static void exynos_irq_eint_unmask(struct irq_data *data) { u32 mask; spin_lock(&eint_lock); mask = __raw_readl(EINT_MASK(exynos_eint_base, data->irq)); mask &= ~(EINT_OFFSET_BIT(data->irq)); __raw_writel(mask, EINT_MASK(exynos_eint_base, data->irq)); spin_unlock(&eint_lock); } static inline void exynos_irq_eint_ack(struct irq_data *data) { __raw_writel(EINT_OFFSET_BIT(data->irq), EINT_PEND(exynos_eint_base, data->irq)); } static void exynos_irq_eint_maskack(struct irq_data *data) { exynos_irq_eint_mask(data); exynos_irq_eint_ack(data); } static int exynos_irq_eint_set_type(struct irq_data *data, unsigned int type) { int offs = EINT_OFFSET(data->irq); int shift; u32 ctrl, mask; u32 newvalue = 0; switch (type) { case IRQ_TYPE_EDGE_RISING: newvalue = S5P_IRQ_TYPE_EDGE_RISING; break; case IRQ_TYPE_EDGE_FALLING: newvalue = S5P_IRQ_TYPE_EDGE_FALLING; break; case IRQ_TYPE_EDGE_BOTH: newvalue = S5P_IRQ_TYPE_EDGE_BOTH; break; case IRQ_TYPE_LEVEL_LOW: newvalue = S5P_IRQ_TYPE_LEVEL_LOW; break; case IRQ_TYPE_LEVEL_HIGH: newvalue = S5P_IRQ_TYPE_LEVEL_HIGH; break; default: printk(KERN_ERR "No such irq type %d", type); return -EINVAL; } shift = (offs & 0x7) * 4; mask = 0x7 << shift; spin_lock(&eint_lock); ctrl = __raw_readl(EINT_CON(exynos_eint_base, data->irq)); ctrl &= ~mask; ctrl |= newvalue << shift; __raw_writel(ctrl, EINT_CON(exynos_eint_base, data->irq)); spin_unlock(&eint_lock); if (soc_is_exynos5250()) s3c_gpio_cfgpin(exynos5_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf)); else s3c_gpio_cfgpin(exynos4_irq_to_gpio(data->irq), S3C_GPIO_SFN(0xf)); return 0; } static struct irq_chip exynos_irq_eint = { .name = "exynos-eint", .irq_mask = exynos_irq_eint_mask, .irq_unmask = exynos_irq_eint_unmask, .irq_mask_ack = exynos_irq_eint_maskack, .irq_ack = exynos_irq_eint_ack, .irq_set_type = exynos_irq_eint_set_type, #ifdef CONFIG_PM .irq_set_wake = s3c_irqext_wake, #endif }; /* * exynos4_irq_demux_eint * * This function demuxes the IRQ from from EINTs 16 to 31. * It is designed to be inlined into the specific handler * s5p_irq_demux_eintX_Y. * * Each EINT pend/mask registers handle eight of them. */ static inline void exynos_irq_demux_eint(unsigned int start) { unsigned int irq; u32 status = __raw_readl(EINT_PEND(exynos_eint_base, start)); u32 mask = __raw_readl(EINT_MASK(exynos_eint_base, start)); status &= ~mask; status &= 0xff; while (status) { irq = fls(status) - 1; generic_handle_irq(irq + start); status &= ~(1 << irq); } } static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc) { struct irq_chip *chip = irq_get_chip(irq); chained_irq_enter(chip, desc); exynos_irq_demux_eint(IRQ_EINT(16)); exynos_irq_demux_eint(IRQ_EINT(24)); chained_irq_exit(chip, desc); } static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc) { u32 *irq_data = irq_get_handler_data(irq); struct irq_chip *chip = irq_get_chip(irq); chained_irq_enter(chip, desc); generic_handle_irq(*irq_data); chained_irq_exit(chip, desc); } static int __init exynos_init_irq_eint(void) { int irq; #ifdef CONFIG_PINCTRL_SAMSUNG /* * The Samsung pinctrl driver provides an integrated gpio/pinmux/pinconf * functionality along with support for external gpio and wakeup * interrupts. If the samsung pinctrl driver is enabled and includes * the wakeup interrupt support, then the setting up external wakeup * interrupts here can be skipped. This check here is temporary to * allow exynos4 platforms that do not use Samsung pinctrl driver to * co-exist with platforms that do. When all of the Samsung Exynos4 * platforms switch over to using the pinctrl driver, the wakeup * interrupt support code here can be completely removed. */ static const struct of_device_id exynos_pinctrl_ids[] = { { .compatible = "samsung,exynos4210-pinctrl", }, { .compatible = "samsung,exynos4x12-pinctrl", }, }; struct device_node *pctrl_np, *wkup_np; const char *wkup_compat = "samsung,exynos4210-wakeup-eint"; for_each_matching_node(pctrl_np, exynos_pinctrl_ids) { if (of_device_is_available(pctrl_np)) { wkup_np = of_find_compatible_node(pctrl_np, NULL, wkup_compat); if (wkup_np) return -ENODEV; } } #endif if (soc_is_exynos5440()) return 0; if (soc_is_exynos5250()) exynos_eint_base = ioremap(EXYNOS5_PA_GPIO1, SZ_4K); else exynos_eint_base = ioremap(EXYNOS4_PA_GPIO2, SZ_4K); if (exynos_eint_base == NULL) { pr_err("unable to ioremap for EINT base address\n"); return -ENOMEM; } for (irq = 0 ; irq <= 31 ; irq++) { irq_set_chip_and_handler(IRQ_EINT(irq), &exynos_irq_eint, handle_level_irq); set_irq_flags(IRQ_EINT(irq), IRQF_VALID); } irq_set_chained_handler(EXYNOS_IRQ_EINT16_31, exynos_irq_demux_eint16_31); for (irq = 0 ; irq <= 15 ; irq++) { eint0_15_data[irq] = IRQ_EINT(irq); if (soc_is_exynos5250()) { irq_set_handler_data(exynos5_eint0_15_src_int[irq], &eint0_15_data[irq]); irq_set_chained_handler(exynos5_eint0_15_src_int[irq], exynos_irq_eint0_15); } else { irq_set_handler_data(exynos4_eint0_15_src_int[irq], &eint0_15_data[irq]); irq_set_chained_handler(exynos4_eint0_15_src_int[irq], exynos_irq_eint0_15); } } return 0; } arch_initcall(exynos_init_irq_eint);