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21#include <linux/clocksource.h>
22#include <linux/io.h>
23#include <linux/irqchip.h>
24#include <linux/pm.h>
25
26#include <asm/mach-types.h>
27#include <asm/mach/arch.h>
28#include <asm/mach/time.h>
29#include <asm/mach/map.h>
30
31#include <linux/of.h>
32#include <linux/of_address.h>
33#include <linux/of_irq.h>
34#include <linux/of_platform.h>
35
36#include "common.h"
37
38#define LEGACY_GPIO_BASE 0xD8110000
39#define LEGACY_PMC_BASE 0xD8130000
40
41
42#define VT8500_GPIO_MUX_REG 0x200
43
44
45#define VT8500_HCR_REG 0x12
46#define VT8500_PMSR_REG 0x60
47
48static void __iomem *pmc_base;
49
50void vt8500_restart(char mode, const char *cmd)
51{
52 if (pmc_base)
53 writel(1, pmc_base + VT8500_PMSR_REG);
54}
55
56static struct map_desc vt8500_io_desc[] __initdata = {
57
58 [0] = {
59 .virtual = 0xf8000000,
60 .pfn = __phys_to_pfn(0xd8000000),
61 .length = 0x00390000,
62 .type = MT_DEVICE
63 },
64};
65
66void __init vt8500_map_io(void)
67{
68 iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
69}
70
71static void vt8500_power_off(void)
72{
73 local_irq_disable();
74 writew(5, pmc_base + VT8500_HCR_REG);
75 asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0));
76}
77
78void __init vt8500_init(void)
79{
80 struct device_node *np;
81#if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505)
82 struct device_node *fb;
83 void __iomem *gpio_base;
84#endif
85
86#ifdef CONFIG_FB_VT8500
87 fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
88 if (fb) {
89 np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
90 if (np) {
91 gpio_base = of_iomap(np, 0);
92
93 if (!gpio_base)
94 pr_err("%s: of_iomap(gpio_mux) failed\n",
95 __func__);
96
97 of_node_put(np);
98 } else {
99 gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
100 if (!gpio_base)
101 pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
102 __func__);
103 }
104 if (gpio_base) {
105 writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
106 gpio_base + VT8500_GPIO_MUX_REG);
107 iounmap(gpio_base);
108 } else
109 pr_err("%s: Could not remap GPIO mux\n", __func__);
110
111 of_node_put(fb);
112 }
113#endif
114
115#ifdef CONFIG_FB_WM8505
116 fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
117 if (fb) {
118 np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
119 if (!np)
120 np = of_find_compatible_node(NULL, NULL,
121 "wm,wm8650-gpio");
122 if (np) {
123 gpio_base = of_iomap(np, 0);
124
125 if (!gpio_base)
126 pr_err("%s: of_iomap(gpio_mux) failed\n",
127 __func__);
128
129 of_node_put(np);
130 } else {
131 gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
132 if (!gpio_base)
133 pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
134 __func__);
135 }
136 if (gpio_base) {
137 writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
138 0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
139 iounmap(gpio_base);
140 } else
141 pr_err("%s: Could not remap GPIO mux\n", __func__);
142
143 of_node_put(fb);
144 }
145#endif
146
147 np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
148 if (np) {
149 pmc_base = of_iomap(np, 0);
150
151 if (!pmc_base)
152 pr_err("%s:of_iomap(pmc) failed\n", __func__);
153
154 of_node_put(np);
155 } else {
156 pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
157 if (!pmc_base)
158 pr_err("%s:ioremap(power_off) failed\n", __func__);
159 }
160 if (pmc_base)
161 pm_power_off = &vt8500_power_off;
162 else
163 pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
164
165 vtwm_clk_init(pmc_base);
166
167 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
168}
169
170static const char * const vt8500_dt_compat[] = {
171 "via,vt8500",
172 "wm,wm8650",
173 "wm,wm8505",
174 "wm,wm8750",
175 "wm,wm8850",
176 NULL
177};
178
179DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
180 .dt_compat = vt8500_dt_compat,
181 .map_io = vt8500_map_io,
182 .init_irq = irqchip_init,
183 .init_machine = vt8500_init,
184 .init_time = clocksource_of_init,
185 .restart = vt8500_restart,
186MACHINE_END
187
188
