2 * SAMSUNG EXYNOS Flattened Device Tree enabled machine
4 * Copyright (c) 2010-2014 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
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/init.h>
14 #include <linux/kernel.h>
15 #include <linux/serial_s3c.h>
17 #include <linux/of_address.h>
18 #include <linux/of_fdt.h>
19 #include <linux/of_platform.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_domain.h>
22 #include <linux/irqchip.h>
24 #include <asm/cacheflush.h>
25 #include <asm/hardware/cache-l2x0.h>
26 #include <asm/mach/arch.h>
27 #include <asm/mach/map.h>
28 #include <asm/memory.h>
36 void __iomem *pmu_base_addr;
38 static struct map_desc exynos4_iodesc[] __initdata = {
40 .virtual = (unsigned long)S5P_VA_SROMC,
41 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
45 .virtual = (unsigned long)S5P_VA_CMU,
46 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
50 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
51 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
55 .virtual = (unsigned long)S5P_VA_DMC0,
56 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
60 .virtual = (unsigned long)S5P_VA_DMC1,
61 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
67 static struct map_desc exynos5_iodesc[] __initdata = {
69 .virtual = (unsigned long)S5P_VA_SROMC,
70 .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
74 .virtual = (unsigned long)S5P_VA_CMU,
75 .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
76 .length = 144 * SZ_1K,
81 static struct platform_device exynos_cpuidle = {
82 .name = "exynos_cpuidle",
83 #ifdef CONFIG_ARM_EXYNOS_CPUIDLE
84 .dev.platform_data = exynos_enter_aftr,
89 void __iomem *sysram_base_addr;
90 void __iomem *sysram_ns_base_addr;
92 void __init exynos_sysram_init(void)
94 struct device_node *node;
96 for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram") {
97 if (!of_device_is_available(node))
99 sysram_base_addr = of_iomap(node, 0);
103 for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram-ns") {
104 if (!of_device_is_available(node))
106 sysram_ns_base_addr = of_iomap(node, 0);
111 static void __init exynos_init_late(void)
113 if (of_machine_is_compatible("samsung,exynos5440"))
114 /* to be supported later */
120 static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
121 int depth, void *data)
123 struct map_desc iodesc;
127 if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
128 !of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
131 reg = of_get_flat_dt_prop(node, "reg", &len);
132 if (reg == NULL || len != (sizeof(unsigned long) * 2))
135 iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
136 iodesc.length = be32_to_cpu(reg[1]) - 1;
137 iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
138 iodesc.type = MT_DEVICE;
139 iotable_init(&iodesc, 1);
146 * register the standard cpu IO areas
148 static void __init exynos_map_io(void)
150 if (soc_is_exynos4())
151 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
153 if (soc_is_exynos5())
154 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
157 static void __init exynos_init_io(void)
161 of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
163 /* detect cpu id and rev. */
164 s5p_init_cpu(S5P_VA_CHIPID);
170 * Apparently, these SoCs are not able to wake-up from suspend using
171 * the PMU. Too bad. Should they suddenly become capable of such a
172 * feat, the matches below should be moved to suspend.c.
174 static const struct of_device_id exynos_dt_pmu_match[] = {
175 { .compatible = "samsung,exynos5260-pmu" },
176 { .compatible = "samsung,exynos5410-pmu" },
180 static void exynos_map_pmu(void)
182 struct device_node *np;
184 np = of_find_matching_node(NULL, exynos_dt_pmu_match);
186 pmu_base_addr = of_iomap(np, 0);
189 static void __init exynos_init_irq(void)
193 * Since platsmp.c needs pmu base address by the time
194 * DT is not unflatten so we can't use DT APIs before
200 static void __init exynos_dt_machine_init(void)
203 * This is called from smp_prepare_cpus if we've built for SMP, but
204 * we still need to set it up for PM and firmware ops if not.
206 if (!IS_ENABLED(CONFIG_SMP))
207 exynos_sysram_init();
209 #ifdef CONFIG_ARM_EXYNOS_CPUIDLE
210 if (of_machine_is_compatible("samsung,exynos4210"))
211 exynos_cpuidle.dev.platform_data = &cpuidle_coupled_exynos_data;
213 if (of_machine_is_compatible("samsung,exynos4210") ||
214 of_machine_is_compatible("samsung,exynos4212") ||
215 (of_machine_is_compatible("samsung,exynos4412") &&
216 of_machine_is_compatible("samsung,trats2")) ||
217 of_machine_is_compatible("samsung,exynos5250"))
218 platform_device_register(&exynos_cpuidle);
220 platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
222 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
225 static char const *const exynos_dt_compat[] __initconst = {
227 "samsung,exynos3250",
229 "samsung,exynos4210",
230 "samsung,exynos4212",
231 "samsung,exynos4412",
232 "samsung,exynos4415",
234 "samsung,exynos5250",
235 "samsung,exynos5260",
236 "samsung,exynos5420",
237 "samsung,exynos5440",
241 static void __init exynos_reserve(void)
243 #ifdef CONFIG_S5P_DEV_MFC
252 for (i = 0; i < ARRAY_SIZE(mfc_mem); i++)
253 if (of_scan_flat_dt(s5p_fdt_alloc_mfc_mem, mfc_mem[i]))
258 static void __init exynos_dt_fixup(void)
261 * Some versions of uboot pass garbage entries in the memory node,
262 * use the old CONFIG_ARM_NR_BANKS
264 of_fdt_limit_memory(8);
267 DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
268 /* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
269 /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
270 .l2c_aux_val = 0x3c400001,
271 .l2c_aux_mask = 0xc20fffff,
272 .smp = smp_ops(exynos_smp_ops),
273 .map_io = exynos_init_io,
274 .init_early = exynos_firmware_init,
275 .init_irq = exynos_init_irq,
276 .init_machine = exynos_dt_machine_init,
277 .init_late = exynos_init_late,
278 .dt_compat = exynos_dt_compat,
279 .reserve = exynos_reserve,
280 .dt_fixup = exynos_dt_fixup,