bc9d920ae54f0f28a58597682abcc0e9c0c99c5e
[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
30 #include <asm/mach-types.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/flash.h>
33 #include <asm/mach/time.h>
34 #include <asm/gpio.h>
35
36 static struct flash_platform_data nslu2_flash_data = {
37         .map_name               = "cfi_probe",
38         .width                  = 2,
39 };
40
41 static struct resource nslu2_flash_resource = {
42         .flags                  = IORESOURCE_MEM,
43 };
44
45 static struct platform_device nslu2_flash = {
46         .name                   = "IXP4XX-Flash",
47         .id                     = 0,
48         .dev.platform_data      = &nslu2_flash_data,
49         .num_resources          = 1,
50         .resource               = &nslu2_flash_resource,
51 };
52
53 static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
54         .sda_pin                = NSLU2_SDA_PIN,
55         .scl_pin                = NSLU2_SCL_PIN,
56 };
57
58 static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
59         {
60                 I2C_BOARD_INFO("x1205", 0x6f),
61         },
62 };
63
64 static struct gpio_led nslu2_led_pins[] = {
65         {
66                 .name           = "nslu2:green:ready",
67                 .gpio           = NSLU2_LED_GRN_GPIO,
68         },
69         {
70                 .name           = "nslu2:red:status",
71                 .gpio           = NSLU2_LED_RED_GPIO,
72         },
73         {
74                 .name           = "nslu2:green:disk-1",
75                 .gpio           = NSLU2_LED_DISK1_GPIO,
76                 .active_low     = true,
77         },
78         {
79                 .name           = "nslu2:green:disk-2",
80                 .gpio           = NSLU2_LED_DISK2_GPIO,
81                 .active_low     = true,
82         },
83 };
84
85 static struct gpio_led_platform_data nslu2_led_data = {
86         .num_leds               = ARRAY_SIZE(nslu2_led_pins),
87         .leds                   = nslu2_led_pins,
88 };
89
90 static struct platform_device nslu2_leds = {
91         .name                   = "leds-gpio",
92         .id                     = -1,
93         .dev.platform_data      = &nslu2_led_data,
94 };
95
96 static struct platform_device nslu2_i2c_gpio = {
97         .name                   = "i2c-gpio",
98         .id                     = 0,
99         .dev     = {
100                 .platform_data  = &nslu2_i2c_gpio_data,
101         },
102 };
103
104 static struct platform_device nslu2_beeper = {
105         .name                   = "ixp4xx-beeper",
106         .id                     = NSLU2_GPIO_BUZZ,
107         .num_resources          = 0,
108 };
109
110 static struct resource nslu2_uart_resources[] = {
111         {
112                 .start          = IXP4XX_UART1_BASE_PHYS,
113                 .end            = IXP4XX_UART1_BASE_PHYS + 0x0fff,
114                 .flags          = IORESOURCE_MEM,
115         },
116         {
117                 .start          = IXP4XX_UART2_BASE_PHYS,
118                 .end            = IXP4XX_UART2_BASE_PHYS + 0x0fff,
119                 .flags          = IORESOURCE_MEM,
120         }
121 };
122
123 static struct plat_serial8250_port nslu2_uart_data[] = {
124         {
125                 .mapbase        = IXP4XX_UART1_BASE_PHYS,
126                 .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
127                 .irq            = IRQ_IXP4XX_UART1,
128                 .flags          = UPF_BOOT_AUTOCONF,
129                 .iotype         = UPIO_MEM,
130                 .regshift       = 2,
131                 .uartclk        = IXP4XX_UART_XTAL,
132         },
133         {
134                 .mapbase        = IXP4XX_UART2_BASE_PHYS,
135                 .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
136                 .irq            = IRQ_IXP4XX_UART2,
137                 .flags          = UPF_BOOT_AUTOCONF,
138                 .iotype         = UPIO_MEM,
139                 .regshift       = 2,
140                 .uartclk        = IXP4XX_UART_XTAL,
141         },
142         { }
143 };
144
145 static struct platform_device nslu2_uart = {
146         .name                   = "serial8250",
147         .id                     = PLAT8250_DEV_PLATFORM,
148         .dev.platform_data      = nslu2_uart_data,
149         .num_resources          = 2,
150         .resource               = nslu2_uart_resources,
151 };
152
153 /* Built-in 10/100 Ethernet MAC interfaces */
154 static struct eth_plat_info nslu2_plat_eth[] = {
155         {
156                 .phy            = 1,
157                 .rxq            = 3,
158                 .txreadyq       = 20,
159         }
160 };
161
162 static struct platform_device nslu2_eth[] = {
163         {
164                 .name                   = "ixp4xx_eth",
165                 .id                     = IXP4XX_ETH_NPEB,
166                 .dev.platform_data      = nslu2_plat_eth,
167         }
168 };
169
170 static struct platform_device *nslu2_devices[] __initdata = {
171         &nslu2_i2c_gpio,
172         &nslu2_flash,
173         &nslu2_beeper,
174         &nslu2_leds,
175         &nslu2_eth[0],
176 };
177
178 static void nslu2_power_off(void)
179 {
180         /* This causes the box to drop the power and go dead. */
181
182         /* enable the pwr cntl gpio */
183         gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
184
185         /* do the deed */
186         gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
187 }
188
189 static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
190 {
191         /* Signal init to do the ctrlaltdel action, this will bypass init if
192          * it hasn't started and do a kernel_restart.
193          */
194         ctrl_alt_del();
195
196         return IRQ_HANDLED;
197 }
198
199 static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
200 {
201         /* This is the paper-clip reset, it shuts the machine down directly.
202          */
203         machine_power_off();
204
205         return IRQ_HANDLED;
206 }
207
208 static void __init nslu2_timer_init(void)
209 {
210     /* The xtal on this machine is non-standard. */
211     ixp4xx_timer_freq = NSLU2_FREQ;
212
213     /* Call standard timer_init function. */
214     ixp4xx_timer_init();
215 }
216
217 static struct sys_timer nslu2_timer = {
218     .init   = nslu2_timer_init,
219 };
220
221 static void __init nslu2_init(void)
222 {
223         DECLARE_MAC_BUF(mac_buf);
224         uint8_t __iomem *f;
225         int i;
226
227         ixp4xx_sys_init();
228
229         nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
230         nslu2_flash_resource.end =
231                 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
232
233         i2c_register_board_info(0, nslu2_i2c_board_info,
234                                 ARRAY_SIZE(nslu2_i2c_board_info));
235
236         /*
237          * This is only useful on a modified machine, but it is valuable
238          * to have it first in order to see debug messages, and so that
239          * it does *not* get removed if platform_add_devices fails!
240          */
241         (void)platform_device_register(&nslu2_uart);
242
243         platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
244
245         pm_power_off = nslu2_power_off;
246
247         if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
248                 IRQF_DISABLED | IRQF_TRIGGER_LOW,
249                 "NSLU2 reset button", NULL) < 0) {
250
251                 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
252                         gpio_to_irq(NSLU2_RB_GPIO));
253         }
254
255         if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
256                 IRQF_DISABLED | IRQF_TRIGGER_HIGH,
257                 "NSLU2 power button", NULL) < 0) {
258
259                 printk(KERN_DEBUG "Power Button IRQ %d not available\n",
260                         gpio_to_irq(NSLU2_PB_GPIO));
261         }
262
263         /*
264          * Map in a portion of the flash and read the MAC address.
265          * Since it is stored in BE in the flash itself, we need to
266          * byteswap it if we're in LE mode.
267          */
268         f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
269         if (f) {
270                 for (i = 0; i < 6; i++)
271 #ifdef __ARMEB__
272                         nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
273 #else
274                         nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
275 #endif
276                 iounmap(f);
277         }
278         printk(KERN_INFO "NSLU2: Using MAC address %s for port 0\n",
279                print_mac(mac_buf, nslu2_plat_eth[0].hwaddr));
280
281 }
282
283 MACHINE_START(NSLU2, "Linksys NSLU2")
284         /* Maintainer: www.nslu2-linux.org */
285         .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
286         .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
287         .boot_params    = 0x00000100,
288         .map_io         = ixp4xx_map_io,
289         .init_irq       = ixp4xx_init_irq,
290         .timer          = &nslu2_timer,
291         .init_machine   = nslu2_init,
292 MACHINE_END