/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}