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[linux-2.6.git] / 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/gpio.h>
24
25 #include <mach/hardware.h>
26 #include <mach/irqs.h>
27 #include <asm/mach/map.h>
28 #include <asm/hardware/vic.h>
29
30 #include <asm/cacheflush.h>
31 #include <asm/hardware/cache-l2x0.h>
32
33 /* The 8815 has 4 GPIO blocks, let's register them immediately */
34 static struct nmk_gpio_platform_data cpu8815_gpio[] = {
35         {
36                 .name = "GPIO-0-31",
37                 .first_gpio = 0,
38                 .first_irq = NOMADIK_GPIO_TO_IRQ(0),
39                 .parent_irq = IRQ_GPIO0,
40         }, {
41                 .name = "GPIO-32-63",
42                 .first_gpio = 32,
43                 .first_irq = NOMADIK_GPIO_TO_IRQ(32),
44                 .parent_irq = IRQ_GPIO1,
45         }, {
46                 .name = "GPIO-64-95",
47                 .first_gpio = 64,
48                 .first_irq = NOMADIK_GPIO_TO_IRQ(64),
49                 .parent_irq = IRQ_GPIO2,
50         }, {
51                 .name = "GPIO-96-127", /* 124..127 not routed to pin */
52                 .first_gpio = 96,
53                 .first_irq = NOMADIK_GPIO_TO_IRQ(96),
54                 .parent_irq = IRQ_GPIO3,
55         }
56 };
57
58 #define __MEM_4K_RESOURCE(x) \
59         .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
60
61 static struct amba_device cpu8815_amba_gpio[] = {
62         {
63                 .dev = {
64                         .init_name = "gpio0",
65                         .platform_data = cpu8815_gpio + 0,
66                 },
67                 __MEM_4K_RESOURCE(NOMADIK_GPIO0_BASE),
68         }, {
69                 .dev = {
70                         .init_name = "gpio1",
71                         .platform_data = cpu8815_gpio + 1,
72                 },
73                 __MEM_4K_RESOURCE(NOMADIK_GPIO1_BASE),
74         }, {
75                 .dev = {
76                         .init_name = "gpio2",
77                         .platform_data = cpu8815_gpio + 2,
78                 },
79                 __MEM_4K_RESOURCE(NOMADIK_GPIO2_BASE),
80         }, {
81                 .dev = {
82                         .init_name = "gpio3",
83                         .platform_data = cpu8815_gpio + 3,
84                 },
85                 __MEM_4K_RESOURCE(NOMADIK_GPIO3_BASE),
86         },
87 };
88
89 static struct amba_device *amba_devs[] __initdata = {
90         cpu8815_amba_gpio + 0,
91         cpu8815_amba_gpio + 1,
92         cpu8815_amba_gpio + 2,
93         cpu8815_amba_gpio + 3,
94 };
95
96 static int __init cpu8815_init(void)
97 {
98         int i;
99
100         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
101                 amba_device_register(amba_devs[i], &iomem_resource);
102         return 0;
103 }
104 arch_initcall(cpu8815_init);
105
106 /* All SoC devices live in the same area (see hardware.h) */
107 static struct map_desc nomadik_io_desc[] __initdata = {
108         {
109                 .virtual =      NOMADIK_IO_VIRTUAL,
110                 .pfn =          __phys_to_pfn(NOMADIK_IO_PHYSICAL),
111                 .length =       NOMADIK_IO_SIZE,
112                 .type =         MT_DEVICE,
113         }
114         /* static ram and secured ram may be added later */
115 };
116
117 void __init cpu8815_map_io(void)
118 {
119         iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
120 }
121
122 void __init cpu8815_init_irq(void)
123 {
124         /* This modified VIC cell has two register blocks, at 0 and 0x20 */
125         vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
126         vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
127 }
128
129 /*
130  * This function is called from the board init ("init_machine").
131  */
132  void __init cpu8815_platform_init(void)
133 {
134 #ifdef CONFIG_CACHE_L2X0
135         /* At full speed latency must be >=2, so 0x249 in low bits */
136         l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
137 #endif
138          return;
139 }