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3145d8a6 RW |
1 | /* |
2 | * arch/arm/mach-ixp4xx/nas100d-setup.c | |
3 | * | |
4 | * NAS 100d board-setup | |
5 | * | |
c7d1623e RW |
6 | * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> |
7 | * | |
8 | * based on ixdp425-setup.c: | |
3145d8a6 | 9 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
c7d1623e RW |
10 | * based on nas100d-power.c: |
11 | * Copyright (C) 2005 Tower Technologies | |
12 | * based on nas100d-io.c | |
13 | * Copyright (C) 2004 Karen Spearel | |
3145d8a6 RW |
14 | * |
15 | * Author: Alessandro Zummo <a.zummo@towertech.it> | |
16 | * Author: Rod Whitby <rod@whitby.id.au> | |
17 | * Maintainers: http://www.nslu2-linux.org/ | |
18 | * | |
19 | */ | |
20 | ||
b7edc84a | 21 | #include <linux/if_ether.h> |
c7d1623e RW |
22 | #include <linux/irq.h> |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/timer.h> | |
3145d8a6 RW |
25 | #include <linux/serial.h> |
26 | #include <linux/serial_8250.h> | |
df6934b3 | 27 | #include <linux/leds.h> |
c7d1623e | 28 | #include <linux/reboot.h> |
400d8231 | 29 | #include <linux/i2c.h> |
5a4a2387 | 30 | #include <linux/i2c-gpio.h> |
3145d8a6 RW |
31 | |
32 | #include <asm/mach-types.h> | |
33 | #include <asm/mach/arch.h> | |
34 | #include <asm/mach/flash.h> | |
b7edc84a | 35 | #include <asm/io.h> |
c7d1623e | 36 | #include <asm/gpio.h> |
3145d8a6 RW |
37 | |
38 | static struct flash_platform_data nas100d_flash_data = { | |
39 | .map_name = "cfi_probe", | |
40 | .width = 2, | |
41 | }; | |
42 | ||
43 | static struct resource nas100d_flash_resource = { | |
3145d8a6 RW |
44 | .flags = IORESOURCE_MEM, |
45 | }; | |
46 | ||
47 | static struct platform_device nas100d_flash = { | |
48 | .name = "IXP4XX-Flash", | |
49 | .id = 0, | |
50 | .dev.platform_data = &nas100d_flash_data, | |
51 | .num_resources = 1, | |
52 | .resource = &nas100d_flash_resource, | |
53 | }; | |
54 | ||
400d8231 RW |
55 | static struct i2c_board_info __initdata nas100d_i2c_board_info [] = { |
56 | { | |
57 | I2C_BOARD_INFO("rtc-pcf8563", 0x51), | |
58 | }, | |
59 | }; | |
60 | ||
1208ebf2 | 61 | static struct gpio_led nas100d_led_pins[] = { |
df6934b3 RW |
62 | { |
63 | .name = "wlan", /* green led */ | |
1208ebf2 RW |
64 | .gpio = NAS100D_LED_WLAN_GPIO, |
65 | .active_low = true, | |
df6934b3 RW |
66 | }, |
67 | { | |
14645eba | 68 | .name = "power", /* blue power led (off=flashing) */ |
1208ebf2 RW |
69 | .gpio = NAS100D_LED_PWR_GPIO, |
70 | .active_low = true, | |
df6934b3 RW |
71 | }, |
72 | { | |
73 | .name = "disk", /* yellow led */ | |
1208ebf2 RW |
74 | .gpio = NAS100D_LED_DISK_GPIO, |
75 | .active_low = true, | |
df6934b3 RW |
76 | }, |
77 | }; | |
78 | ||
1208ebf2 RW |
79 | static struct gpio_led_platform_data nas100d_led_data = { |
80 | .num_leds = ARRAY_SIZE(nas100d_led_pins), | |
81 | .leds = nas100d_led_pins, | |
82 | }; | |
83 | ||
df6934b3 | 84 | static struct platform_device nas100d_leds = { |
1208ebf2 | 85 | .name = "leds-gpio", |
df6934b3 | 86 | .id = -1, |
1208ebf2 | 87 | .dev.platform_data = &nas100d_led_data, |
df6934b3 | 88 | }; |
df6934b3 | 89 | |
5a4a2387 | 90 | static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = { |
3145d8a6 RW |
91 | .sda_pin = NAS100D_SDA_PIN, |
92 | .scl_pin = NAS100D_SCL_PIN, | |
93 | }; | |
94 | ||
5a4a2387 MLJ |
95 | static struct platform_device nas100d_i2c_gpio = { |
96 | .name = "i2c-gpio", | |
3145d8a6 | 97 | .id = 0, |
5a4a2387 MLJ |
98 | .dev = { |
99 | .platform_data = &nas100d_i2c_gpio_data, | |
100 | }, | |
3145d8a6 RW |
101 | }; |
102 | ||
103 | static struct resource nas100d_uart_resources[] = { | |
104 | { | |
105 | .start = IXP4XX_UART1_BASE_PHYS, | |
106 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
107 | .flags = IORESOURCE_MEM, | |
108 | }, | |
109 | { | |
110 | .start = IXP4XX_UART2_BASE_PHYS, | |
111 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
112 | .flags = IORESOURCE_MEM, | |
113 | } | |
114 | }; | |
115 | ||
116 | static struct plat_serial8250_port nas100d_uart_data[] = { | |
117 | { | |
118 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
119 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
120 | .irq = IRQ_IXP4XX_UART1, | |
121 | .flags = UPF_BOOT_AUTOCONF, | |
122 | .iotype = UPIO_MEM, | |
123 | .regshift = 2, | |
124 | .uartclk = IXP4XX_UART_XTAL, | |
125 | }, | |
126 | { | |
127 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
128 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
129 | .irq = IRQ_IXP4XX_UART2, | |
130 | .flags = UPF_BOOT_AUTOCONF, | |
131 | .iotype = UPIO_MEM, | |
132 | .regshift = 2, | |
133 | .uartclk = IXP4XX_UART_XTAL, | |
134 | }, | |
135 | { } | |
136 | }; | |
137 | ||
138 | static struct platform_device nas100d_uart = { | |
139 | .name = "serial8250", | |
140 | .id = PLAT8250_DEV_PLATFORM, | |
141 | .dev.platform_data = nas100d_uart_data, | |
142 | .num_resources = 2, | |
143 | .resource = nas100d_uart_resources, | |
144 | }; | |
145 | ||
b7edc84a RW |
146 | /* Built-in 10/100 Ethernet MAC interfaces */ |
147 | static struct eth_plat_info nas100d_plat_eth[] = { | |
148 | { | |
149 | .phy = 0, | |
150 | .rxq = 3, | |
151 | .txreadyq = 20, | |
152 | } | |
153 | }; | |
154 | ||
155 | static struct platform_device nas100d_eth[] = { | |
156 | { | |
157 | .name = "ixp4xx_eth", | |
158 | .id = IXP4XX_ETH_NPEB, | |
159 | .dev.platform_data = nas100d_plat_eth, | |
160 | } | |
161 | }; | |
162 | ||
3145d8a6 | 163 | static struct platform_device *nas100d_devices[] __initdata = { |
5a4a2387 | 164 | &nas100d_i2c_gpio, |
3145d8a6 | 165 | &nas100d_flash, |
df6934b3 | 166 | &nas100d_leds, |
b7edc84a | 167 | &nas100d_eth[0], |
3145d8a6 RW |
168 | }; |
169 | ||
170 | static void nas100d_power_off(void) | |
171 | { | |
172 | /* This causes the box to drop the power and go dead. */ | |
173 | ||
174 | /* enable the pwr cntl gpio */ | |
175 | gpio_line_config(NAS100D_PO_GPIO, IXP4XX_GPIO_OUT); | |
176 | ||
177 | /* do the deed */ | |
178 | gpio_line_set(NAS100D_PO_GPIO, IXP4XX_GPIO_HIGH); | |
179 | } | |
180 | ||
c7d1623e RW |
181 | /* This is used to make sure the power-button pusher is serious. The button |
182 | * must be held until the value of this counter reaches zero. | |
183 | */ | |
184 | static int power_button_countdown; | |
185 | ||
186 | /* Must hold the button down for at least this many counts to be processed */ | |
187 | #define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ | |
188 | ||
189 | static void nas100d_power_handler(unsigned long data); | |
190 | static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0); | |
191 | ||
192 | static void nas100d_power_handler(unsigned long data) | |
193 | { | |
194 | /* This routine is called twice per second to check the | |
195 | * state of the power button. | |
196 | */ | |
197 | ||
198 | if (gpio_get_value(NAS100D_PB_GPIO)) { | |
199 | ||
200 | /* IO Pin is 1 (button pushed) */ | |
201 | if (power_button_countdown > 0) | |
202 | power_button_countdown--; | |
203 | ||
204 | } else { | |
205 | ||
206 | /* Done on button release, to allow for auto-power-on mods. */ | |
207 | if (power_button_countdown == 0) { | |
208 | /* Signal init to do the ctrlaltdel action, | |
209 | * this will bypass init if it hasn't started | |
210 | * and do a kernel_restart. | |
211 | */ | |
212 | ctrl_alt_del(); | |
213 | ||
214 | /* Change the state of the power LED to "blink" */ | |
215 | gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW); | |
216 | } else { | |
217 | power_button_countdown = PBUTTON_HOLDDOWN_COUNT; | |
218 | } | |
219 | } | |
220 | ||
221 | mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); | |
222 | } | |
223 | ||
224 | static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) | |
225 | { | |
226 | /* This is the paper-clip reset, it shuts the machine down directly. */ | |
227 | machine_power_off(); | |
228 | ||
229 | return IRQ_HANDLED; | |
230 | } | |
231 | ||
3145d8a6 RW |
232 | static void __init nas100d_init(void) |
233 | { | |
b7edc84a RW |
234 | DECLARE_MAC_BUF(mac_buf); |
235 | uint8_t __iomem *f; | |
236 | int i; | |
237 | ||
3145d8a6 RW |
238 | ixp4xx_sys_init(); |
239 | ||
dcc8fa50 AZ |
240 | /* gpio 14 and 15 are _not_ clocks */ |
241 | *IXP4XX_GPIO_GPCLKR = 0; | |
242 | ||
54e269ea DS |
243 | nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
244 | nas100d_flash_resource.end = | |
245 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
246 | ||
400d8231 RW |
247 | i2c_register_board_info(0, nas100d_i2c_board_info, |
248 | ARRAY_SIZE(nas100d_i2c_board_info)); | |
249 | ||
cc50a0df MLJ |
250 | /* |
251 | * This is only useful on a modified machine, but it is valuable | |
df6934b3 RW |
252 | * to have it first in order to see debug messages, and so that |
253 | * it does *not* get removed if platform_add_devices fails! | |
254 | */ | |
255 | (void)platform_device_register(&nas100d_uart); | |
256 | ||
3145d8a6 | 257 | platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices)); |
b7edc84a | 258 | |
c7d1623e RW |
259 | pm_power_off = nas100d_power_off; |
260 | ||
261 | if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler, | |
262 | IRQF_DISABLED | IRQF_TRIGGER_LOW, | |
263 | "NAS100D reset button", NULL) < 0) { | |
264 | ||
265 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
266 | gpio_to_irq(NAS100D_RB_GPIO)); | |
267 | } | |
268 | ||
269 | /* The power button on the Iomega NAS100d is on GPIO 14, but | |
270 | * it cannot handle interrupts on that GPIO line. So we'll | |
271 | * have to poll it with a kernel timer. | |
272 | */ | |
273 | ||
274 | /* Make sure that the power button GPIO is set up as an input */ | |
275 | gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN); | |
276 | ||
277 | /* Set the initial value for the power button IRQ handler */ | |
278 | power_button_countdown = PBUTTON_HOLDDOWN_COUNT; | |
279 | ||
280 | mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); | |
281 | ||
b7edc84a RW |
282 | /* |
283 | * Map in a portion of the flash and read the MAC address. | |
284 | * Since it is stored in BE in the flash itself, we need to | |
285 | * byteswap it if we're in LE mode. | |
286 | */ | |
287 | f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000); | |
288 | if (f) { | |
289 | for (i = 0; i < 6; i++) | |
290 | #ifdef __ARMEB__ | |
291 | nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i); | |
292 | #else | |
293 | nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3)); | |
294 | #endif | |
295 | iounmap(f); | |
296 | } | |
297 | printk(KERN_INFO "NAS100D: Using MAC address %s for port 0\n", | |
298 | print_mac(mac_buf, nas100d_plat_eth[0].hwaddr)); | |
299 | ||
3145d8a6 RW |
300 | } |
301 | ||
302 | MACHINE_START(NAS100D, "Iomega NAS 100d") | |
303 | /* Maintainer: www.nslu2-linux.org */ | |
3145d8a6 RW |
304 | .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS, |
305 | .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC, | |
306 | .boot_params = 0x00000100, | |
307 | .map_io = ixp4xx_map_io, | |
308 | .init_irq = ixp4xx_init_irq, | |
309 | .timer = &ixp4xx_timer, | |
310 | .init_machine = nas100d_init, | |
311 | MACHINE_END |