aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-ixp4xx/nslu2-setup.c
blob: ac81ccb26bfea8b63902f83041b66137fb11896f (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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/*
 * arch/arm/mach-ixp4xx/nslu2-setup.c
 *
 * NSLU2 board-setup
 *
 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
 *
 * based on ixdp425-setup.c:
 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
 * based on nslu2-power.c:
 *	Copyright (C) 2005 Tower Technologies
 *
 * Author: Mark Rakes <mrakes at mac.com>
 * Author: Rod Whitby <rod@whitby.id.au>
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 * Maintainers: http://www.nslu2-linux.org/
 *
 */
#include <linux/gpio.h>
#include <linux/if_ether.h>
#include <linux/irq.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/leds.h>
#include <linux/reboot.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/io.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/time.h>

#define NSLU2_SDA_PIN		7
#define NSLU2_SCL_PIN		6

/* NSLU2 Timer */
#define NSLU2_FREQ 66000000

/* Buttons */
#define NSLU2_PB_GPIO		5	/* power button */
#define NSLU2_PO_GPIO		8	/* power off */
#define NSLU2_RB_GPIO		12	/* reset button */

/* Buzzer */
#define NSLU2_GPIO_BUZZ		4

/* LEDs */
#define NSLU2_LED_RED_GPIO	0
#define NSLU2_LED_GRN_GPIO	1
#define NSLU2_LED_DISK1_GPIO	3
#define NSLU2_LED_DISK2_GPIO	2

static struct flash_platform_data nslu2_flash_data = {
	.map_name		= "cfi_probe",
	.width			= 2,
};

static struct resource nslu2_flash_resource = {
	.flags			= IORESOURCE_MEM,
};

static struct platform_device nslu2_flash = {
	.name			= "IXP4XX-Flash",
	.id			= 0,
	.dev.platform_data	= &nslu2_flash_data,
	.num_resources		= 1,
	.resource		= &nslu2_flash_resource,
};

static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
	.sda_pin		= NSLU2_SDA_PIN,
	.scl_pin		= NSLU2_SCL_PIN,
};

static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
	{
		I2C_BOARD_INFO("x1205", 0x6f),
	},
};

static struct gpio_led nslu2_led_pins[] = {
	{
		.name		= "nslu2:green:ready",
		.gpio		= NSLU2_LED_GRN_GPIO,
	},
	{
		.name		= "nslu2:red:status",
		.gpio		= NSLU2_LED_RED_GPIO,
	},
	{
		.name		= "nslu2:green:disk-1",
		.gpio		= NSLU2_LED_DISK1_GPIO,
		.active_low	= true,
	},
	{
		.name		= "nslu2:green:disk-2",
		.gpio		= NSLU2_LED_DISK2_GPIO,
		.active_low	= true,
	},
};

static struct gpio_led_platform_data nslu2_led_data = {
	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
	.leds			= nslu2_led_pins,
};

static struct platform_device nslu2_leds = {
	.name			= "leds-gpio",
	.id			= -1,
	.dev.platform_data	= &nslu2_led_data,
};

static struct platform_device nslu2_i2c_gpio = {
	.name			= "i2c-gpio",
	.id			= 0,
	.dev	 = {
		.platform_data	= &nslu2_i2c_gpio_data,
	},
};

static struct platform_device nslu2_beeper = {
	.name			= "ixp4xx-beeper",
	.id			= NSLU2_GPIO_BUZZ,
	.num_resources		= 0,
};

static struct resource nslu2_uart_resources[] = {
	{
		.start		= IXP4XX_UART1_BASE_PHYS,
		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= IXP4XX_UART2_BASE_PHYS,
		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
		.flags		= IORESOURCE_MEM,
	}
};

static struct plat_serial8250_port nslu2_uart_data[] = {
	{
		.mapbase	= IXP4XX_UART1_BASE_PHYS,
		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
		.irq		= IRQ_IXP4XX_UART1,
		.flags		= UPF_BOOT_AUTOCONF,
		.iotype		= UPIO_MEM,
		.regshift	= 2,
		.uartclk	= IXP4XX_UART_XTAL,
	},
	{
		.mapbase	= IXP4XX_UART2_BASE_PHYS,
		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
		.irq		= IRQ_IXP4XX_UART2,
		.flags		= UPF_BOOT_AUTOCONF,
		.iotype		= UPIO_MEM,
		.regshift	= 2,
		.uartclk	= IXP4XX_UART_XTAL,
	},
	{ }
};

static struct platform_device nslu2_uart = {
	.name			= "serial8250",
	.id			= PLAT8250_DEV_PLATFORM,
	.dev.platform_data	= nslu2_uart_data,
	.num_resources		= 2,
	.resource		= nslu2_uart_resources,
};

/* Built-in 10/100 Ethernet MAC interfaces */
static struct eth_plat_info nslu2_plat_eth[] = {
	{
		.phy		= 1,
		.rxq		= 3,
		.txreadyq	= 20,
	}
};

static struct platform_device nslu2_eth[] = {
	{
		.name			= "ixp4xx_eth",
		.id			= IXP4XX_ETH_NPEB,
		.dev.platform_data	= nslu2_plat_eth,
	}
};

static struct platform_device *nslu2_devices[] __initdata = {
	&nslu2_i2c_gpio,
	&nslu2_flash,
	&nslu2_beeper,
	&nslu2_leds,
	&nslu2_eth[0],
};

static void nslu2_power_off(void)
{
	/* This causes the box to drop the power and go dead. */

	/* enable the pwr cntl gpio */
	gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);

	/* do the deed */
	gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
}

static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
{
	/* Signal init to do the ctrlaltdel action, this will bypass init if
	 * it hasn't started and do a kernel_restart.
	 */
	ctrl_alt_del();

	return IRQ_HANDLED;
}

static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
{
	/* This is the paper-clip reset, it shuts the machine down directly.
	 */
	machine_power_off();

	return IRQ_HANDLED;
}

static void __init nslu2_timer_init(void)
{
    /* The xtal on this machine is non-standard. */
    ixp4xx_timer_freq = NSLU2_FREQ;

    /* Call standard timer_init function. */
    ixp4xx_timer_init();
}

static struct sys_timer nslu2_timer = {
    .init   = nslu2_timer_init,
};

static void __init nslu2_init(void)
{
	uint8_t __iomem *f;
	int i;

	ixp4xx_sys_init();

	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	nslu2_flash_resource.end =
		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

	i2c_register_board_info(0, nslu2_i2c_board_info,
				ARRAY_SIZE(nslu2_i2c_board_info));

	/*
	 * This is only useful on a modified machine, but it is valuable
	 * to have it first in order to see debug messages, and so that
	 * it does *not* get removed if platform_add_devices fails!
	 */
	(void)platform_device_register(&nslu2_uart);

	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));

	pm_power_off = nslu2_power_off;

	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
		IRQF_DISABLED | IRQF_TRIGGER_LOW,
		"NSLU2 reset button", NULL) < 0) {

		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
			gpio_to_irq(NSLU2_RB_GPIO));
	}

	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
		IRQF_DISABLED | IRQF_TRIGGER_HIGH,
		"NSLU2 power button", NULL) < 0) {

		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
			gpio_to_irq(NSLU2_PB_GPIO));
	}

	/*
	 * Map in a portion of the flash and read the MAC address.
	 * Since it is stored in BE in the flash itself, we need to
	 * byteswap it if we're in LE mode.
	 */
	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
	if (f) {
		for (i = 0; i < 6; i++)
#ifdef __ARMEB__
			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
#else
			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
#endif
		iounmap(f);
	}
	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
	       nslu2_plat_eth[0].hwaddr);

}

MACHINE_START(NSLU2, "Linksys NSLU2")
	/* Maintainer: www.nslu2-linux.org */
	.atag_offset	= 0x100,
	.map_io		= ixp4xx_map_io,
	.init_irq	= ixp4xx_init_irq,
	.timer          = &nslu2_timer,
	.init_machine	= nslu2_init,
#if defined(CONFIG_PCI)
	.dma_zone_size	= SZ_64M,
#endif
MACHINE_END