summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-spear6xx/spear6xx.c
blob: b997b1b10ba0bd6fa63c378677138ab01a722cbd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/*
 * arch/arm/mach-spear6xx/spear6xx.c
 *
 * SPEAr6XX machines common source file
 *
 * Copyright (C) 2009 ST Microelectronics
 * Rajeev Kumar<rajeev-dlh.kumar@st.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/types.h>
#include <linux/amba/pl061.h>
#include <linux/ptrace.h>
#include <linux/io.h>
#include <asm/hardware/vic.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <mach/generic.h>
#include <mach/hardware.h>
#include <mach/irqs.h>

/* Add spear6xx machines common devices here */
/* uart device registration */
struct amba_device uart_device[] = {
	{
		.dev = {
			.init_name = "uart0",
		},
		.res = {
			.start = SPEAR6XX_ICM1_UART0_BASE,
			.end = SPEAR6XX_ICM1_UART0_BASE + SZ_4K - 1,
			.flags = IORESOURCE_MEM,
		},
		.irq = {IRQ_UART_0},
	}, {
		.dev = {
			.init_name = "uart1",
		},
		.res = {
			.start = SPEAR6XX_ICM1_UART1_BASE,
			.end = SPEAR6XX_ICM1_UART1_BASE + SZ_4K - 1,
			.flags = IORESOURCE_MEM,
		},
		.irq = {IRQ_UART_1},
	}
};

/* gpio device registration */
static struct pl061_platform_data gpio_plat_data[] = {
	{
		.gpio_base	= 0,
		.irq_base	= SPEAR_GPIO0_INT_BASE,
	}, {
		.gpio_base	= 8,
		.irq_base	= SPEAR_GPIO1_INT_BASE,
	}, {
		.gpio_base	= 16,
		.irq_base	= SPEAR_GPIO2_INT_BASE,
	},
};

struct amba_device gpio_device[] = {
	{
		.dev = {
			.init_name = "gpio0",
			.platform_data = &gpio_plat_data[0],
		},
		.res = {
			.start = SPEAR6XX_CPU_GPIO_BASE,
			.end = SPEAR6XX_CPU_GPIO_BASE + SZ_4K - 1,
			.flags = IORESOURCE_MEM,
		},
		.irq = {IRQ_LOCAL_GPIO},
	}, {
		.dev = {
			.init_name = "gpio1",
			.platform_data = &gpio_plat_data[1],
		},
		.res = {
			.start = SPEAR6XX_ICM3_GPIO_BASE,
			.end = SPEAR6XX_ICM3_GPIO_BASE + SZ_4K - 1,
			.flags = IORESOURCE_MEM,
		},
		.irq = {IRQ_BASIC_GPIO},
	}, {
		.dev = {
			.init_name = "gpio2",
			.platform_data = &gpio_plat_data[2],
		},
		.res = {
			.start = SPEAR6XX_ICM2_GPIO_BASE,
			.end = SPEAR6XX_ICM2_GPIO_BASE + SZ_4K - 1,
			.flags = IORESOURCE_MEM,
		},
		.irq = {IRQ_APPL_GPIO},
	}
};

/* This will add devices, and do machine specific tasks */
void __init spear6xx_init(void)
{
	/* nothing to do for now */
}

/* This will initialize vic */
void __init spear6xx_init_irq(void)
{
	vic_init((void __iomem *)VA_SPEAR6XX_CPU_VIC_PRI_BASE, 0, ~0, 0);
	vic_init((void __iomem *)VA_SPEAR6XX_CPU_VIC_SEC_BASE, 32, ~0, 0);
}

/* Following will create static virtual/physical mappings */
static struct map_desc spear6xx_io_desc[] __initdata = {
	{
		.virtual	= VA_SPEAR6XX_ICM1_UART0_BASE,
		.pfn		= __phys_to_pfn(SPEAR6XX_ICM1_UART0_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE
	}, {
		.virtual	= VA_SPEAR6XX_CPU_VIC_PRI_BASE,
		.pfn		= __phys_to_pfn(SPEAR6XX_CPU_VIC_PRI_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE
	}, {
		.virtual	= VA_SPEAR6XX_CPU_VIC_SEC_BASE,
		.pfn		= __phys_to_pfn(SPEAR6XX_CPU_VIC_SEC_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE
	}, {
		.virtual	= VA_SPEAR6XX_ICM3_SYS_CTRL_BASE,
		.pfn		= __phys_to_pfn(SPEAR6XX_ICM3_SYS_CTRL_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE
	}, {
		.virtual	= VA_SPEAR6XX_ICM3_MISC_REG_BASE,
		.pfn		= __phys_to_pfn(SPEAR6XX_ICM3_MISC_REG_BASE),
		.length		= SZ_4K,
		.type		= MT_DEVICE
	},
};

/* This will create static memory mapping for selected devices */
void __init spear6xx_map_io(void)
{
	iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));

	/* This will initialize clock framework */
	spear6xx_clk_init();
}

static void __init spear6xx_timer_init(void)
{
	char pclk_name[] = "pll3_48m_clk";
	struct clk *gpt_clk, *pclk;

	/* get the system timer clock */
	gpt_clk = clk_get_sys("gpt0", NULL);
	if (IS_ERR(gpt_clk)) {
		pr_err("%s:couldn't get clk for gpt\n", __func__);
		BUG();
	}

	/* get the suitable parent clock for timer*/
	pclk = clk_get(NULL, pclk_name);
	if (IS_ERR(pclk)) {
		pr_err("%s:couldn't get %s as parent for gpt\n",
				__func__, pclk_name);
		BUG();
	}

	clk_set_parent(gpt_clk, pclk);
	clk_put(gpt_clk);
	clk_put(pclk);

	spear_setup_timer();
}

struct sys_timer spear6xx_timer = {
	.init = spear6xx_timer_init,
};
OpenPOWER on IntegriCloud