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>
23 #include <asm/cacheflush.h>
24 #include <asm/hardware/cache-l2x0.h>
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
27 #include <asm/memory.h>
33 #define L2_AUX_VAL 0x7C470001
34 #define L2_AUX_MASK 0xC200ffff
36 static struct map_desc exynos4_iodesc[] __initdata = {
38 .virtual = (unsigned long)S3C_VA_SYS,
39 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
43 .virtual = (unsigned long)S3C_VA_TIMER,
44 .pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
48 .virtual = (unsigned long)S3C_VA_WATCHDOG,
49 .pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
53 .virtual = (unsigned long)S5P_VA_SROMC,
54 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
58 .virtual = (unsigned long)S5P_VA_SYSTIMER,
59 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
63 .virtual = (unsigned long)S5P_VA_PMU,
64 .pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
68 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
69 .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
73 .virtual = (unsigned long)S5P_VA_GIC_CPU,
74 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
78 .virtual = (unsigned long)S5P_VA_GIC_DIST,
79 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
83 .virtual = (unsigned long)S5P_VA_CMU,
84 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
88 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
89 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
93 .virtual = (unsigned long)S5P_VA_L2CC,
94 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
98 .virtual = (unsigned long)S5P_VA_DMC0,
99 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
103 .virtual = (unsigned long)S5P_VA_DMC1,
104 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
108 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
109 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
115 static struct map_desc exynos5_iodesc[] __initdata = {
117 .virtual = (unsigned long)S3C_VA_SYS,
118 .pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
122 .virtual = (unsigned long)S3C_VA_TIMER,
123 .pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
127 .virtual = (unsigned long)S3C_VA_WATCHDOG,
128 .pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
132 .virtual = (unsigned long)S5P_VA_SROMC,
133 .pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
137 .virtual = (unsigned long)S5P_VA_CMU,
138 .pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
139 .length = 144 * SZ_1K,
142 .virtual = (unsigned long)S5P_VA_PMU,
143 .pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
149 void exynos_restart(enum reboot_mode mode, const char *cmd)
151 struct device_node *np;
153 void __iomem *addr = EXYNOS_SWRESET;
155 if (of_machine_is_compatible("samsung,exynos5440")) {
157 np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
159 addr = of_iomap(np, 0) + 0xbc;
160 status = __raw_readl(addr);
162 addr = of_iomap(np, 0) + 0xcc;
163 val = __raw_readl(addr);
165 val = (val & 0xffff0000) | (status & 0xffff);
168 __raw_writel(val, addr);
171 static struct platform_device exynos_cpuidle = {
172 .name = "exynos_cpuidle",
173 .dev.platform_data = exynos_enter_aftr,
177 void __init exynos_cpuidle_init(void)
179 if (soc_is_exynos5440())
182 platform_device_register(&exynos_cpuidle);
185 void __init exynos_cpufreq_init(void)
187 platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
190 void __init exynos_init_late(void)
192 if (of_machine_is_compatible("samsung,exynos5440"))
193 /* to be supported later */
196 pm_genpd_poweroff_unused();
200 static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
201 int depth, void *data)
203 struct map_desc iodesc;
207 if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
208 !of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
211 reg = of_get_flat_dt_prop(node, "reg", &len);
212 if (reg == NULL || len != (sizeof(unsigned long) * 2))
215 iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
216 iodesc.length = be32_to_cpu(reg[1]) - 1;
217 iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
218 iodesc.type = MT_DEVICE;
219 iotable_init(&iodesc, 1);
226 * register the standard cpu IO areas
228 static void __init exynos_map_io(void)
230 if (soc_is_exynos4())
231 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
233 if (soc_is_exynos5())
234 iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
237 void __init exynos_init_io(void)
241 of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
243 /* detect cpu id and rev. */
244 s5p_init_cpu(S5P_VA_CHIPID);
249 static int __init exynos4_l2x0_cache_init(void)
253 if (!soc_is_exynos4())
256 ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
260 if (IS_ENABLED(CONFIG_S5P_SLEEP)) {
261 l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
262 clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
266 early_initcall(exynos4_l2x0_cache_init);
268 static void __init exynos_dt_machine_init(void)
270 struct device_node *i2c_np;
271 const char *i2c_compat = "samsung,s3c2440-i2c";
276 * Exynos5's legacy i2c controller and new high speed i2c
277 * controller have muxed interrupt sources. By default the
278 * interrupts for 4-channel HS-I2C controller are enabled.
279 * If node for first four channels of legacy i2c controller
280 * are available then re-configure the interrupts via the
283 if (soc_is_exynos5()) {
284 for_each_compatible_node(i2c_np, NULL, i2c_compat) {
285 if (of_device_is_available(i2c_np)) {
286 id = of_alias_get_id(i2c_np, "i2c");
288 tmp = readl(EXYNOS5_SYS_I2C_CFG);
289 writel(tmp & ~(0x1 << id),
290 EXYNOS5_SYS_I2C_CFG);
296 exynos_cpuidle_init();
297 exynos_cpufreq_init();
299 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
302 static char const *exynos_dt_compat[] __initconst = {
304 "samsung,exynos3250",
306 "samsung,exynos4210",
307 "samsung,exynos4212",
308 "samsung,exynos4412",
310 "samsung,exynos5250",
311 "samsung,exynos5260",
312 "samsung,exynos5420",
313 "samsung,exynos5440",
317 static void __init exynos_reserve(void)
319 #ifdef CONFIG_S5P_DEV_MFC
327 for (i = 0; i < ARRAY_SIZE(mfc_mem); i++)
328 if (of_scan_flat_dt(s5p_fdt_alloc_mfc_mem, mfc_mem[i]))
333 DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
334 /* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
335 /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
336 .smp = smp_ops(exynos_smp_ops),
337 .map_io = exynos_init_io,
338 .init_early = exynos_firmware_init,
339 .init_machine = exynos_dt_machine_init,
340 .init_late = exynos_init_late,
341 .dt_compat = exynos_dt_compat,
342 .restart = exynos_restart,
343 .reserve = exynos_reserve,