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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 | .boot_params = 0x00000100, |
304 | .map_io = ixp4xx_map_io, |
305 | .init_irq = ixp4xx_init_irq, |
306 | .timer = &nslu2_timer, |
307 | .init_machine = nslu2_init, |
308 | MACHINE_END |
309 |
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