Root/arch/arm/mach-nomadik/cpu-8815.c

1/*
2 * Copyright STMicroelectronics, 2007.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#include <linux/types.h>
20#include <linux/init.h>
21#include <linux/device.h>
22#include <linux/amba/bus.h>
23#include <linux/platform_device.h>
24#include <linux/gpio.h>
25
26#include <mach/hardware.h>
27#include <mach/irqs.h>
28#include <asm/mach/map.h>
29#include <asm/hardware/vic.h>
30
31#include <asm/cacheflush.h>
32#include <asm/hardware/cache-l2x0.h>
33
34#include "clock.h"
35
36#define __MEM_4K_RESOURCE(x) \
37    .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
38
39/* The 8815 has 4 GPIO blocks, let's register them immediately */
40
41#define GPIO_RESOURCE(block) \
42    { \
43        .start = NOMADIK_GPIO##block##_BASE, \
44        .end = NOMADIK_GPIO##block##_BASE + SZ_4K - 1, \
45        .flags = IORESOURCE_MEM, \
46    }, \
47    { \
48        .start = IRQ_GPIO##block, \
49        .end = IRQ_GPIO##block, \
50        .flags = IORESOURCE_IRQ, \
51    }
52
53#define GPIO_DEVICE(block) \
54    { \
55        .name = "gpio", \
56        .id = block, \
57        .num_resources = 2, \
58        .resource = &cpu8815_gpio_resources[block * 2], \
59        .dev = { \
60            .platform_data = &cpu8815_gpio[block], \
61        }, \
62    }
63
64static struct nmk_gpio_platform_data cpu8815_gpio[] = {
65    {
66        .name = "GPIO-0-31",
67        .first_gpio = 0,
68        .first_irq = NOMADIK_GPIO_TO_IRQ(0),
69    }, {
70        .name = "GPIO-32-63",
71        .first_gpio = 32,
72        .first_irq = NOMADIK_GPIO_TO_IRQ(32),
73    }, {
74        .name = "GPIO-64-95",
75        .first_gpio = 64,
76        .first_irq = NOMADIK_GPIO_TO_IRQ(64),
77    }, {
78        .name = "GPIO-96-127", /* 124..127 not routed to pin */
79        .first_gpio = 96,
80        .first_irq = NOMADIK_GPIO_TO_IRQ(96),
81    }
82};
83
84static struct resource cpu8815_gpio_resources[] = {
85    GPIO_RESOURCE(0),
86    GPIO_RESOURCE(1),
87    GPIO_RESOURCE(2),
88    GPIO_RESOURCE(3),
89};
90
91static struct platform_device cpu8815_platform_gpio[] = {
92    GPIO_DEVICE(0),
93    GPIO_DEVICE(1),
94    GPIO_DEVICE(2),
95    GPIO_DEVICE(3),
96};
97
98static struct amba_device cpu8815_amba_rng = {
99    .dev = {
100        .init_name = "rng",
101    },
102    __MEM_4K_RESOURCE(NOMADIK_RNG_BASE),
103};
104
105static struct platform_device *platform_devs[] __initdata = {
106    cpu8815_platform_gpio + 0,
107    cpu8815_platform_gpio + 1,
108    cpu8815_platform_gpio + 2,
109    cpu8815_platform_gpio + 3,
110};
111
112static struct amba_device *amba_devs[] __initdata = {
113    &cpu8815_amba_rng
114};
115
116static int __init cpu8815_init(void)
117{
118    int i;
119
120    platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
121    for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
122        amba_device_register(amba_devs[i], &iomem_resource);
123    return 0;
124}
125arch_initcall(cpu8815_init);
126
127/* All SoC devices live in the same area (see hardware.h) */
128static struct map_desc nomadik_io_desc[] __initdata = {
129    {
130        .virtual = NOMADIK_IO_VIRTUAL,
131        .pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL),
132        .length = NOMADIK_IO_SIZE,
133        .type = MT_DEVICE,
134    }
135    /* static ram and secured ram may be added later */
136};
137
138void __init cpu8815_map_io(void)
139{
140    iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
141}
142
143void __init cpu8815_init_irq(void)
144{
145    /* This modified VIC cell has two register blocks, at 0 and 0x20 */
146    vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0);
147    vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
148
149    /*
150     * Init clocks here so that they are available for system timer
151     * initialization.
152     */
153    clk_init();
154}
155
156/*
157 * This function is called from the board init ("init_machine").
158 */
159 void __init cpu8815_platform_init(void)
160{
161#ifdef CONFIG_CACHE_L2X0
162    /* At full speed latency must be >=2, so 0x249 in low bits */
163    l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
164#endif
165     return;
166}
167

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