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76b92b40 BH |
1 | /* |
2 | * armadillo 800 eva board support | |
3 | * | |
4 | * Copyright (C) 2012 Renesas Solutions Corp. | |
5 | * Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; version 2 of the License. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <linux/clk.h> | |
23 | #include <linux/err.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/gpio.h> | |
26 | #include <linux/io.h> | |
76b92b40 BH |
27 | #include <mach/common.h> |
28 | #include <mach/r8a7740.h> | |
29 | #include <asm/mach/arch.h> | |
30 | #include <asm/hardware/cache-l2x0.h> | |
31 | ||
32 | /* | |
33 | * CON1 Camera Module | |
34 | * CON2 Extension Bus | |
35 | * CON3 HDMI Output | |
36 | * CON4 Composite Video Output | |
37 | * CON5 H-UDI JTAG | |
38 | * CON6 ARM JTAG | |
39 | * CON7 SD1 | |
40 | * CON8 SD2 | |
41 | * CON9 RTC BackUp | |
42 | * CON10 Monaural Mic Input | |
43 | * CON11 Stereo Headphone Output | |
44 | * CON12 Audio Line Output(L) | |
45 | * CON13 Audio Line Output(R) | |
46 | * CON14 AWL13 Module | |
47 | * CON15 Extension | |
48 | * CON16 LCD1 | |
49 | * CON17 LCD2 | |
50 | * CON19 Power Input | |
51 | * CON20 USB1 | |
52 | * CON21 USB2 | |
53 | * CON22 Serial | |
54 | * CON23 LAN | |
55 | * CON24 USB3 | |
56 | * LED1 Camera LED(Yellow) | |
57 | * LED2 Power LED (Green) | |
58 | * ED3-LED6 User LED(Yellow) | |
59 | * LED7 LAN link LED(Green) | |
60 | * LED8 LAN activity LED(Yellow) | |
61 | */ | |
62 | ||
63 | /* | |
64 | * DipSwitch | |
65 | * | |
66 | * SW1 | |
67 | * | |
68 | * -12345678-+---------------+---------------------------- | |
69 | * 1 | boot | hermit | |
70 | * 0 | boot | OS auto boot | |
71 | * -12345678-+---------------+---------------------------- | |
72 | * 00 | boot device | eMMC | |
73 | * 10 | boot device | SDHI0 (CON7) | |
74 | * 01 | boot device | - | |
75 | * 11 | boot device | Extension Buss (CS0) | |
76 | * -12345678-+---------------+---------------------------- | |
77 | * 0 | Extension Bus | D8-D15 disable, eMMC enable | |
78 | * 1 | Extension Bus | D8-D15 enable, eMMC disable | |
79 | * -12345678-+---------------+---------------------------- | |
80 | * 0 | SDHI1 | COM8 disable, COM14 enable | |
81 | * 1 | SDHI1 | COM8 enable, COM14 disable | |
82 | * -12345678-+---------------+---------------------------- | |
83 | * 0 | USB0 | COM20 enable, COM24 disable | |
84 | * 1 | USB0 | COM20 disable, COM24 enable | |
85 | * -12345678-+---------------+---------------------------- | |
86 | * 00 | JTAG | SH-X2 | |
87 | * 10 | JTAG | ARM | |
88 | * 01 | JTAG | - | |
89 | * 11 | JTAG | Boundary Scan | |
90 | *-----------+---------------+---------------------------- | |
91 | */ | |
92 | ||
93 | /* | |
94 | * FSI-WM8978 | |
95 | * | |
96 | * this command is required when playback. | |
97 | * | |
98 | * # amixer set "Headphone" 50 | |
99 | * | |
100 | * this command is required when capture. | |
101 | * | |
102 | * # amixer set "Input PGA" 15 | |
103 | * # amixer set "Left Input Mixer MicP" on | |
104 | * # amixer set "Left Input Mixer MicN" on | |
105 | * # amixer set "Right Input Mixer MicN" on | |
106 | * # amixer set "Right Input Mixer MicP" on | |
107 | */ | |
108 | ||
109 | /* | |
110 | * USB function | |
111 | * | |
112 | * When you use USB Function, | |
113 | * set SW1.6 ON, and connect cable to CN24. | |
114 | * | |
115 | * USBF needs workaround on R8A7740 chip. | |
116 | * These are a little bit complex. | |
117 | * see | |
118 | * usbhsf_power_ctrl() | |
119 | */ | |
120 | ||
76b92b40 BH |
121 | static void __init eva_clock_init(void) |
122 | { | |
123 | struct clk *system = clk_get(NULL, "system_clk"); | |
124 | struct clk *xtal1 = clk_get(NULL, "extal1"); | |
125 | struct clk *usb24s = clk_get(NULL, "usb24s"); | |
126 | struct clk *fsibck = clk_get(NULL, "fsibck"); | |
127 | ||
128 | if (IS_ERR(system) || | |
129 | IS_ERR(xtal1) || | |
130 | IS_ERR(usb24s) || | |
131 | IS_ERR(fsibck)) { | |
132 | pr_err("armadillo800eva board clock init failed\n"); | |
133 | goto clock_error; | |
134 | } | |
135 | ||
136 | /* armadillo 800 eva extal1 is 24MHz */ | |
137 | clk_set_rate(xtal1, 24000000); | |
138 | ||
139 | /* usb24s use extal1 (= system) clock (= 24MHz) */ | |
140 | clk_set_parent(usb24s, system); | |
141 | ||
142 | /* FSIBCK is 12.288MHz, and it is parent of FSI-B */ | |
143 | clk_set_rate(fsibck, 12288000); | |
144 | ||
145 | clock_error: | |
146 | if (!IS_ERR(system)) | |
147 | clk_put(system); | |
148 | if (!IS_ERR(xtal1)) | |
149 | clk_put(xtal1); | |
150 | if (!IS_ERR(usb24s)) | |
151 | clk_put(usb24s); | |
152 | if (!IS_ERR(fsibck)) | |
153 | clk_put(fsibck); | |
154 | } | |
155 | ||
156 | /* | |
157 | * board init | |
158 | */ | |
159 | static void __init eva_init(void) | |
160 | { | |
76b92b40 BH |
161 | r8a7740_clock_init(MD_CK0 | MD_CK2); |
162 | eva_clock_init(); | |
163 | ||
76b92b40 BH |
164 | r8a7740_meram_workaround(); |
165 | ||
76b92b40 BH |
166 | #ifdef CONFIG_CACHE_L2X0 |
167 | /* Early BRESP enable, Shared attribute override enable, 32K*8way */ | |
168 | l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff); | |
169 | #endif | |
170 | ||
171 | r8a7740_add_standard_devices_dt(); | |
f36218d2 | 172 | |
76b92b40 BH |
173 | r8a7740_pm_init(); |
174 | } | |
175 | ||
176 | #define RESCNT2 IOMEM(0xe6188020) | |
ab40900b | 177 | static void eva_restart(enum reboot_mode mode, const char *cmd) |
76b92b40 BH |
178 | { |
179 | /* Do soft power on reset */ | |
ab40900b | 180 | writel(1 << 31, RESCNT2); |
76b92b40 BH |
181 | } |
182 | ||
183 | static const char *eva_boards_compat_dt[] __initdata = { | |
184 | "renesas,armadillo800eva-reference", | |
185 | NULL, | |
186 | }; | |
187 | ||
188 | DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference") | |
189 | .map_io = r8a7740_map_io, | |
190 | .init_early = r8a7740_init_delay, | |
191 | .init_irq = r8a7740_init_irq_of, | |
192 | .init_machine = eva_init, | |
76b92b40 BH |
193 | .init_late = shmobile_init_late, |
194 | .dt_compat = eva_boards_compat_dt, | |
195 | .restart = eva_restart, | |
196 | MACHINE_END |