Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6.git] / arch / arm / mach-ixp4xx / nslu2-setup.c
1 /*
2  * arch/arm/mach-ixp4xx/nslu2-setup.c
3  *
4  * NSLU2 board-setup
5  *
6  * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
7  *
8  * based on ixdp425-setup.c:
9  *      Copyright (C) 2003-2004 MontaVista Software, Inc.
10  * based on nslu2-power.c:
11  *      Copyright (C) 2005 Tower Technologies
12  *
13  * Author: Mark Rakes <mrakes at mac.com>
14  * Author: Rod Whitby <rod@whitby.id.au>
15  * Author: Alessandro Zummo <a.zummo@towertech.it>
16  * Maintainers: http://www.nslu2-linux.org/
17  *
18  */
19
20 #include <linux/if_ether.h>
21 #include <linux/irq.h>
22 #include <linux/serial.h>
23 #include <linux/serial_8250.h>
24 #include <linux/leds.h>
25 #include <linux/reboot.h>
26 #include <linux/i2c.h>
27 #include <linux/i2c-gpio.h>
28 #include <linux/io.h>
29 #include <asm/mach-types.h>
30 #include <asm/mach/arch.h>
31 #include <asm/mach/flash.h>
32 #include <asm/mach/time.h>
33 #include <asm/gpio.h>
34
35 #define NSLU2_SDA_PIN           7
36 #define NSLU2_SCL_PIN           6
37
38 /* NSLU2 Timer */
39 #define NSLU2_FREQ 66000000
40
41 /* Buttons */
42 #define NSLU2_PB_GPIO           5       /* power button */
43 #define NSLU2_PO_GPIO           8       /* power off */
44 #define NSLU2_RB_GPIO           12      /* reset button */
45
46 /* Buzzer */
47 #define NSLU2_GPIO_BUZZ         4
48
49 /* LEDs */
50 #define NSLU2_LED_RED_GPIO      0
51 #define NSLU2_LED_GRN_GPIO      1
52 #define NSLU2_LED_DISK1_GPIO    3
53 #define NSLU2_LED_DISK2_GPIO    2
54
55 static struct flash_platform_data nslu2_flash_data = {
56         .map_name               = "cfi_probe",
57         .width                  = 2,
58 };
59
60 static struct resource nslu2_flash_resource = {
61         .flags                  = IORESOURCE_MEM,
62 };
63
64 static struct platform_device nslu2_flash = {
65         .name                   = "IXP4XX-Flash",
66         .id                     = 0,
67         .dev.platform_data      = &nslu2_flash_data,
68         .num_resources          = 1,
69         .resource               = &nslu2_flash_resource,
70 };
71
72 static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
73         .sda_pin                = NSLU2_SDA_PIN,
74         .scl_pin                = NSLU2_SCL_PIN,
75 };
76
77 static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
78         {
79                 I2C_BOARD_INFO("x1205", 0x6f),
80         },
81 };
82
83 static struct gpio_led nslu2_led_pins[] = {
84         {
85                 .name           = "nslu2:green:ready",
86                 .gpio           = NSLU2_LED_GRN_GPIO,
87         },
88         {
89                 .name           = "nslu2:red:status",
90                 .gpio           = NSLU2_LED_RED_GPIO,
91         },
92         {
93                 .name           = "nslu2:green:disk-1",
94                 .gpio           = NSLU2_LED_DISK1_GPIO,
95                 .active_low     = true,
96         },
97         {
98                 .name           = "nslu2:green:disk-2",
99                 .gpio           = NSLU2_LED_DISK2_GPIO,
100                 .active_low     = true,
101         },
102 };
103
104 static struct gpio_led_platform_data nslu2_led_data = {
105         .num_leds               = ARRAY_SIZE(nslu2_led_pins),
106         .leds                   = nslu2_led_pins,
107 };
108
109 static struct platform_device nslu2_leds = {
110         .name                   = "leds-gpio",
111         .id                     = -1,
112         .dev.platform_data      = &nslu2_led_data,
113 };
114
115 static struct platform_device nslu2_i2c_gpio = {
116         .name                   = "i2c-gpio",
117         .id                     = 0,
118         .dev     = {
119                 .platform_data  = &nslu2_i2c_gpio_data,
120         },
121 };
122
123 static struct platform_device nslu2_beeper = {
124         .name                   = "ixp4xx-beeper",
125         .id                     = NSLU2_GPIO_BUZZ,
126         .num_resources          = 0,
127 };
128
129 static struct resource nslu2_uart_resources[] = {
130         {
131                 .start          = IXP4XX_UART1_BASE_PHYS,
132                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
133                 .flags          = IORESOURCE_MEM,
134         },
135         {
136                 .start          = IXP4XX_UART2_BASE_PHYS,
137                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
138                 .flags          = IORESOURCE_MEM,
139         }
140 };
141
142 static struct plat_serial8250_port nslu2_uart_data[] = {
143         {
144                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
145                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
146                 .irq            = IRQ_IXP4XX_UART1,
147                 .flags          = UPF_BOOT_AUTOCONF,
148                 .iotype         = UPIO_MEM,
149                 .regshift       = 2,
150                 .uartclk        = IXP4XX_UART_XTAL,
151         },
152         {
153                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
154                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
155                 .irq            = IRQ_IXP4XX_UART2,
156                 .flags          = UPF_BOOT_AUTOCONF,
157                 .iotype         = UPIO_MEM,
158                 .regshift       = 2,
159                 .uartclk        = IXP4XX_UART_XTAL,
160         },
161         { }
162 };
163
164 static struct platform_device nslu2_uart = {
165         .name                   = "serial8250",
166         .id                     = PLAT8250_DEV_PLATFORM,
167         .dev.platform_data      = nslu2_uart_data,
168         .num_resources          = 2,
169         .resource               = nslu2_uart_resources,
170 };
171
172 /* Built-in 10/100 Ethernet MAC interfaces */
173 static struct eth_plat_info nslu2_plat_eth[] = {
174         {
175                 .phy            = 1,
176                 .rxq            = 3,
177                 .txreadyq       = 20,
178         }
179 };
180
181 static struct platform_device nslu2_eth[] = {
182         {
183                 .name                   = "ixp4xx_eth",
184                 .id                     = IXP4XX_ETH_NPEB,
185                 .dev.platform_data      = nslu2_plat_eth,
186         }
187 };
188
189 static struct platform_device *nslu2_devices[] __initdata = {
190         &nslu2_i2c_gpio,
191         &nslu2_flash,
192         &nslu2_beeper,
193         &nslu2_leds,
194         &nslu2_eth[0],
195 };
196
197 static void nslu2_power_off(void)
198 {
199         /* This causes the box to drop the power and go dead. */
200
201         /* enable the pwr cntl gpio */
202         gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
203
204         /* do the deed */
205         gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
206 }
207
208 static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
209 {
210         /* Signal init to do the ctrlaltdel action, this will bypass init if
211          * it hasn't started and do a kernel_restart.
212          */
213         ctrl_alt_del();
214
215         return IRQ_HANDLED;
216 }
217
218 static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
219 {
220         /* This is the paper-clip reset, it shuts the machine down directly.
221          */
222         machine_power_off();
223
224         return IRQ_HANDLED;
225 }
226
227 static void __init nslu2_timer_init(void)
228 {
229     /* The xtal on this machine is non-standard. */
230     ixp4xx_timer_freq = NSLU2_FREQ;
231
232     /* Call standard timer_init function. */
233     ixp4xx_timer_init();
234 }
235
236 static struct sys_timer nslu2_timer = {
237     .init   = nslu2_timer_init,
238 };
239
240 static void __init nslu2_init(void)
241 {
242         uint8_t __iomem *f;
243         int i;
244
245         ixp4xx_sys_init();
246
247         nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
248         nslu2_flash_resource.end =
249                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
250
251         i2c_register_board_info(0, nslu2_i2c_board_info,
252                                 ARRAY_SIZE(nslu2_i2c_board_info));
253
254         /*
255          * This is only useful on a modified machine, but it is valuable
256          * to have it first in order to see debug messages, and so that
257          * it does *not* get removed if platform_add_devices fails!
258          */
259         (void)platform_device_register(&nslu2_uart);
260
261         platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
262
263         pm_power_off = nslu2_power_off;
264
265         if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
266                 IRQF_DISABLED | IRQF_TRIGGER_LOW,
267                 "NSLU2 reset button", NULL) < 0) {
268
269                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
270                         gpio_to_irq(NSLU2_RB_GPIO));
271         }
272
273         if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
274                 IRQF_DISABLED | IRQF_TRIGGER_HIGH,
275                 "NSLU2 power button", NULL) < 0) {
276
277                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
278                         gpio_to_irq(NSLU2_PB_GPIO));
279         }
280
281         /*
282          * Map in a portion of the flash and read the MAC address.
283          * Since it is stored in BE in the flash itself, we need to
284          * byteswap it if we're in LE mode.
285          */
286         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
287         if (f) {
288                 for (i = 0; i < 6; i++)
289 #ifdef __ARMEB__
290                         nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
291 #else
292                         nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
293 #endif
294                 iounmap(f);
295         }
296         printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
297                nslu2_plat_eth[0].hwaddr);
298
299 }
300
301 MACHINE_START(NSLU2, "Linksys NSLU2")
302         /* Maintainer: www.nslu2-linux.org */
303         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
304         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
305         .boot_params    = 0x00000100,
306         .map_io         = ixp4xx_map_io,
307         .init_irq       = ixp4xx_init_irq,
308         .timer          = &nslu2_timer,
309         .init_machine   = nslu2_init,
310 MACHINE_END