2 * armadillo 800 eva board support
4 * Copyright (C) 2012 Renesas Solutions Corp.
5 * Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.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 as published by
9 * the Free Software Foundation; version 2 of the License.
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.
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
22 #include <linux/clk.h>
23 #include <linux/err.h>
24 #include <linux/kernel.h>
25 #include <linux/gpio.h>
27 #include <linux/of_platform.h>
29 #include <asm/mach/arch.h>
30 #include <asm/hardware/cache-l2x0.h>
39 * CON4 Composite Video Output
45 * CON10 Monaural Mic Input
46 * CON11 Stereo Headphone Output
47 * CON12 Audio Line Output(L)
48 * CON13 Audio Line Output(R)
59 * LED1 Camera LED (Yellow)
60 * LED2 Power LED (Green)
61 * LED3-LED6 User LED (Yellow)
62 * LED7 LAN link LED (Green)
63 * LED8 LAN activity LED (Yellow)
71 * -12345678-+---------------+----------------------------
73 * 0 | boot | OS auto boot
74 * -12345678-+---------------+----------------------------
75 * 00 | boot device | eMMC
76 * 10 | boot device | SDHI0 (CON7)
77 * 01 | boot device | -
78 * 11 | boot device | Extension Buss (CS0)
79 * -12345678-+---------------+----------------------------
80 * 0 | Extension Bus | D8-D15 disable, eMMC enable
81 * 1 | Extension Bus | D8-D15 enable, eMMC disable
82 * -12345678-+---------------+----------------------------
83 * 0 | SDHI1 | COM8 disable, COM14 enable
84 * 1 | SDHI1 | COM8 enable, COM14 disable
85 * -12345678-+---------------+----------------------------
86 * 0 | USB0 | COM20 enable, COM24 disable
87 * 1 | USB0 | COM20 disable, COM24 enable
88 * -12345678-+---------------+----------------------------
92 * 11 | JTAG | Boundary Scan
93 *-----------+---------------+----------------------------
99 * this command is required when playback.
101 * # amixer set "Headphone" 50
103 * this command is required when capture.
105 * # amixer set "Input PGA" 15
106 * # amixer set "Left Input Mixer MicP" on
107 * # amixer set "Left Input Mixer MicN" on
108 * # amixer set "Right Input Mixer MicN" on
109 * # amixer set "Right Input Mixer MicP" on
115 * When you use USB Function,
116 * set SW1.6 ON, and connect cable to CN24.
118 * USBF needs workaround on R8A7740 chip.
119 * These are a little bit complex.
121 * usbhsf_power_ctrl()
124 static void __init eva_clock_init(void)
126 struct clk *system = clk_get(NULL, "system_clk");
127 struct clk *xtal1 = clk_get(NULL, "extal1");
128 struct clk *usb24s = clk_get(NULL, "usb24s");
129 struct clk *fsibck = clk_get(NULL, "fsibck");
131 if (IS_ERR(system) ||
135 pr_err("armadillo800eva board clock init failed\n");
139 /* armadillo 800 eva extal1 is 24MHz */
140 clk_set_rate(xtal1, 24000000);
142 /* usb24s use extal1 (= system) clock (= 24MHz) */
143 clk_set_parent(usb24s, system);
145 /* FSIBCK is 12.288MHz, and it is parent of FSI-B */
146 clk_set_rate(fsibck, 12288000);
162 static void __init eva_init(void)
164 r8a7740_clock_init(MD_CK0 | MD_CK2);
167 r8a7740_meram_workaround();
169 #ifdef CONFIG_CACHE_L2X0
170 /* Shared attribute override enable, 32K*8way */
171 l2x0_init(IOMEM(0xf0002000), 0x00400000, 0xc20f0fff);
174 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
179 #define RESCNT2 IOMEM(0xe6188020)
180 static void eva_restart(enum reboot_mode mode, const char *cmd)
182 /* Do soft power on reset */
183 writel(1 << 31, RESCNT2);
186 static const char *eva_boards_compat_dt[] __initdata = {
187 "renesas,armadillo800eva-reference",
191 DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
192 .map_io = r8a7740_map_io,
193 .init_early = shmobile_init_delay,
194 .init_irq = r8a7740_init_irq_of,
195 .init_machine = eva_init,
196 .init_late = shmobile_init_late,
197 .dt_compat = eva_boards_compat_dt,
198 .restart = eva_restart,