summaryrefslogtreecommitdiffstats
path: root/arch/arm/boards/panda/board.c
blob: f1fbd5e94409280a72e6b941178e0253f41c3350 (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
184
185
186
187
188
189
190
191
192
193
#include <common.h>
#include <console.h>
#include <init.h>
#include <fs.h>
#include <driver.h>
#include <io.h>
#include <ns16550.h>
#include <asm/armlinux.h>
#include <linux/stat.h>
#include <generated/mach-types.h>
#include <mach/omap4-silicon.h>
#include <mach/omap4-devices.h>
#include <mach/sdrc.h>
#include <mach/sys_info.h>
#include <mach/syslib.h>
#include <mach/control.h>
#include <usb/ehci.h>
#include <linux/err.h>
#include <sizes.h>
#include <asm/mmu.h>
#include <mach/gpio.h>
#include <envfs.h>
#include <mach/xload.h>
#include <i2c/i2c.h>
#include <gpio.h>
#include <led.h>

static int board_revision;

#define GPIO_HUB_POWER 1
#define GPIO_HUB_NRESET_39 39
#define GPIO_HUB_NRESET_62 62
#define GPIO_BOARD_ID0 182
#define GPIO_BOARD_ID1 101
#define GPIO_BOARD_ID2 171

static int panda_console_init(void)
{
	omap44xx_add_uart3();

	return 0;
}
console_initcall(panda_console_init);

static int panda_mem_init(void)
{
	omap_add_ram0(SZ_1G);

	return 0;
}
mem_initcall(panda_mem_init);

#ifdef CONFIG_USB_EHCI
static struct ehci_platform_data ehci_pdata = {
	.flags = 0,
};

static void panda_ehci_init(void)
{
	u32 val;
	int hub_nreset;

	if (board_revision)
		hub_nreset = GPIO_HUB_NRESET_62;
	else
		hub_nreset = GPIO_HUB_NRESET_39;

	/* disable the power to the usb hub prior to init */
	gpio_direction_output(GPIO_HUB_POWER, 0);
	gpio_set_value(GPIO_HUB_POWER, 0);

	/* reset phy+hub */
	gpio_direction_output(hub_nreset, 0);
	gpio_set_value(hub_nreset, 0);
	gpio_set_value(hub_nreset, 1);
	val = readl(0x4a009358);
	val |= (1 << 24);
	val |= 0x2;
	writel(val, 0x4a009358);
	writel(0x7, 0x4a008180);
	mdelay(10);

	writel(0x00000014, 0x4a064010);
	writel(0x8000001c, 0x4a064040);

	/* enable power to hub */
	gpio_set_value(GPIO_HUB_POWER, 1);

	omap44xx_add_ehci(&ehci_pdata);
}
#else
static void panda_ehci_init(void)
{}
#endif

static void __init panda_boardrev_init(void)
{
	board_revision = gpio_get_value(GPIO_BOARD_ID0);
	board_revision |= (gpio_get_value(GPIO_BOARD_ID1)<<1);
	board_revision |= (gpio_get_value(GPIO_BOARD_ID2)<<2);

	pr_info("PandaBoard Revision: %03d\n", board_revision);
}

static struct i2c_board_info i2c_devices[] = {
	{
		I2C_BOARD_INFO("twl6030", 0x48),
	},
};

struct gpio_led panda_leds[] = {
	{
		.gpio = 7,
		.led = {
			.name = "heartbeat",
		},
	},
};

static void panda_led_init(void)
{
	led_gpio_register(&panda_leds[0]);
	led_set_trigger(LED_TRIGGER_HEARTBEAT, &panda_leds[0].led);
}

static int panda_devices_init(void)
{
	panda_boardrev_init();

	if (gpio_get_value(182)) {
		/* enable software ioreq */
		sr32(OMAP44XX_SCRM_AUXCLK3, 8, 1, 0x1);
		/* set for sys_clk (38.4MHz) */
		sr32(OMAP44XX_SCRM_AUXCLK3, 1, 2, 0x0);
		/* set divisor to 2 */
		sr32(OMAP44XX_SCRM_AUXCLK3, 16, 4, 0x1);
		/* set the clock source to active */
		sr32(OMAP44XX_SCRM_ALTCLKSRC, 0, 1, 0x1);
		/* enable clocks */
		sr32(OMAP44XX_SCRM_ALTCLKSRC, 2, 2, 0x3);
	} else {
		/* enable software ioreq */
		sr32(OMAP44XX_SCRM_AUXCLK1, 8, 1, 0x1);
		/* set for PER_DPLL */
		sr32(OMAP44XX_SCRM_AUXCLK1, 1, 2, 0x2);
		/* set divisor to 16 */
		sr32(OMAP44XX_SCRM_AUXCLK1, 16, 4, 0xf);
		/* set the clock source to active */
		sr32(OMAP44XX_SCRM_ALTCLKSRC, 0, 1, 0x1);
		/* enable clocks */
		sr32(OMAP44XX_SCRM_ALTCLKSRC, 2, 2, 0x3);
	}

	i2c_register_board_info(0, i2c_devices, ARRAY_SIZE(i2c_devices));
	omap44xx_add_i2c1(NULL);
	omap44xx_add_mmc1(NULL);

	panda_ehci_init();

	panda_led_init();
	armlinux_set_bootparams((void *)0x80000100);
	armlinux_set_architecture(MACH_TYPE_OMAP4_PANDA);

	return 0;
}
device_initcall(panda_devices_init);

#ifdef CONFIG_DEFAULT_ENVIRONMENT
static int panda_env_init(void)
{
	struct stat s;
	char *diskdev = "/dev/disk0.0";
	int ret;

	ret = stat(diskdev, &s);
	if (ret) {
		printf("no %s. using default env\n", diskdev);
		return 0;
	}

	mkdir ("/boot", 0666);
	ret = mount(diskdev, "fat", "/boot");
	if (ret) {
		printf("failed to mount %s\n", diskdev);
		return 0;
	}

	default_environment_path = "/boot/bareboxenv";

	return 0;
}
late_initcall(panda_env_init);
#endif