aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-ixp4xx/nas100d-setup.c
blob: 1010eb7b0083c6a0f33a63fe373d9567c9ea5b7a (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
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
/*
 * arch/arm/mach-ixp4xx/nas100d-setup.c
 *
 * NAS 100d 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 nas100d-power.c:
 *	Copyright (C) 2005 Tower Technologies
 * based on nas100d-io.c
 *	Copyright (C) 2004 Karen Spearel
 *
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 * Author: Rod Whitby <rod@whitby.id.au>
 * Maintainers: http://www.nslu2-linux.org/
 *
 */
#include <linux/gpio.h>
#include <linux/if_ether.h>
#include <linux/irq.h>
#include <linux/jiffies.h>
#include <linux/timer.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>

#define NAS100D_SDA_PIN		5
#define NAS100D_SCL_PIN		6

/* Buttons */
#define NAS100D_PB_GPIO         14   /* power button */
#define NAS100D_RB_GPIO         4    /* reset button */

/* Power control */
#define NAS100D_PO_GPIO         12   /* power off */

/* LEDs */
#define NAS100D_LED_WLAN_GPIO	0
#define NAS100D_LED_DISK_GPIO	3
#define NAS100D_LED_PWR_GPIO	15

static struct flash_platform_data nas100d_flash_data = {
	.map_name		= "cfi_probe",
	.width			= 2,
};

static struct resource nas100d_flash_resource = {
	.flags			= IORESOURCE_MEM,
};

static struct platform_device nas100d_flash = {
	.name			= "IXP4XX-Flash",
	.id			= 0,
	.dev.platform_data	= &nas100d_flash_data,
	.num_resources		= 1,
	.resource		= &nas100d_flash_resource,
};

static struct i2c_board_info __initdata nas100d_i2c_board_info [] = {
	{
		I2C_BOARD_INFO("pcf8563", 0x51),
	},
};

static struct gpio_led nas100d_led_pins[] = {
	{
		.name		= "nas100d:green:wlan",
		.gpio		= NAS100D_LED_WLAN_GPIO,
		.active_low	= true,
	},
	{
		.name		= "nas100d:blue:power",  /* (off=flashing) */
		.gpio		= NAS100D_LED_PWR_GPIO,
		.active_low	= true,
	},
	{
		.name		= "nas100d:yellow:disk",
		.gpio		= NAS100D_LED_DISK_GPIO,
		.active_low	= true,
	},
};

static struct gpio_led_platform_data nas100d_led_data = {
	.num_leds		= ARRAY_SIZE(nas100d_led_pins),
	.leds			= nas100d_led_pins,
};

static struct platform_device nas100d_leds = {
	.name			= "leds-gpio",
	.id			= -1,
	.dev.platform_data	= &nas100d_led_data,
};

static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = {
	.sda_pin		= NAS100D_SDA_PIN,
	.scl_pin		= NAS100D_SCL_PIN,
};

static struct platform_device nas100d_i2c_gpio = {
	.name			= "i2c-gpio",
	.id			= 0,
	.dev	 = {
		.platform_data	= &nas100d_i2c_gpio_data,
	},
};

static struct resource nas100d_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 nas100d_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 nas100d_uart = {
	.name			= "serial8250",
	.id			= PLAT8250_DEV_PLATFORM,
	.dev.platform_data	= nas100d_uart_data,
	.num_resources		= 2,
	.resource		= nas100d_uart_resources,
};

/* Built-in 10/100 Ethernet MAC interfaces */
static struct eth_plat_info nas100d_plat_eth[] = {
	{
		.phy		= 0,
		.rxq		= 3,
		.txreadyq	= 20,
	}
};

static struct platform_device nas100d_eth[] = {
	{
		.name			= "ixp4xx_eth",
		.id			= IXP4XX_ETH_NPEB,
		.dev.platform_data	= nas100d_plat_eth,
	}
};

static struct platform_device *nas100d_devices[] __initdata = {
	&nas100d_i2c_gpio,
	&nas100d_flash,
	&nas100d_leds,
	&nas100d_eth[0],
};

static void nas100d_power_off(void)
{
	/* This causes the box to drop the power and go dead. */

	/* enable the pwr cntl gpio */
	gpio_line_config(NAS100D_PO_GPIO, IXP4XX_GPIO_OUT);

	/* do the deed */
	gpio_line_set(NAS100D_PO_GPIO, IXP4XX_GPIO_HIGH);
}

/* This is used to make sure the power-button pusher is serious.  The button
 * must be held until the value of this counter reaches zero.
 */
static int power_button_countdown;

/* Must hold the button down for at least this many counts to be processed */
#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */

static void nas100d_power_handler(unsigned long data);
static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0);

static void nas100d_power_handler(unsigned long data)
{
	/* This routine is called twice per second to check the
	 * state of the power button.
	 */

	if (gpio_get_value(NAS100D_PB_GPIO)) {

		/* IO Pin is 1 (button pushed) */
		if (power_button_countdown > 0)
			power_button_countdown--;

	} else {

		/* Done on button release, to allow for auto-power-on mods. */
		if (power_button_countdown == 0) {
			/* Signal init to do the ctrlaltdel action,
			 * this will bypass init if it hasn't started
			 * and do a kernel_restart.
			 */
			ctrl_alt_del();

			/* Change the state of the power LED to "blink" */
			gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
		} else {
			power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
		}
	}

	mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
}

static irqreturn_t nas100d_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 nas100d_init(void)
{
	uint8_t __iomem *f;
	int i;

	ixp4xx_sys_init();

	/* gpio 14 and 15 are _not_ clocks */
	*IXP4XX_GPIO_GPCLKR = 0;

	nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	nas100d_flash_resource.end =
		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

	i2c_register_board_info(0, nas100d_i2c_board_info,
				ARRAY_SIZE(nas100d_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(&nas100d_uart);

	platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices));

	pm_power_off = nas100d_power_off;

	if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler,
		IRQF_DISABLED | IRQF_TRIGGER_LOW,
		"NAS100D reset button", NULL) < 0) {

		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
			gpio_to_irq(NAS100D_RB_GPIO));
	}

	/* The power button on the Iomega NAS100d is on GPIO 14, but
	 * it cannot handle interrupts on that GPIO line.  So we'll
	 * have to poll it with a kernel timer.
	 */

	/* Make sure that the power button GPIO is set up as an input */
	gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN);

	/* Set the initial value for the power button IRQ handler */
	power_button_countdown = PBUTTON_HOLDDOWN_COUNT;

	mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));

	/*
	 * 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), 0x1000000);
	if (f) {
		for (i = 0; i < 6; i++)
#ifdef __ARMEB__
			nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i);
#else
			nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3));
#endif
		iounmap(f);
	}
	printk(KERN_INFO "NAS100D: Using MAC address %pM for port 0\n",
	       nas100d_plat_eth[0].hwaddr);

}

MACHINE_START(NAS100D, "Iomega NAS 100d")
	/* Maintainer: www.nslu2-linux.org */
	.atag_offset	= 0x100,
	.map_io		= ixp4xx_map_io,
	.init_irq	= ixp4xx_init_irq,
	.timer          = &ixp4xx_timer,
	.init_machine	= nas100d_init,
#if defined(CONFIG_PCI)
	.dma_zone_size	= SZ_64M,
#endif
	.restart	= ixp4xx_restart,
MACHINE_END