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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3145d8a6 RW |
2 | /* |
3 | * arch/arm/mach-ixp4xx/nas100d-setup.c | |
4 | * | |
5 | * NAS 100d board-setup | |
6 | * | |
c7d1623e RW |
7 | * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> |
8 | * | |
9 | * based on ixdp425-setup.c: | |
3145d8a6 | 10 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
c7d1623e RW |
11 | * based on nas100d-power.c: |
12 | * Copyright (C) 2005 Tower Technologies | |
13 | * based on nas100d-io.c | |
14 | * Copyright (C) 2004 Karen Spearel | |
3145d8a6 RW |
15 | * |
16 | * Author: Alessandro Zummo <a.zummo@towertech.it> | |
17 | * Author: Rod Whitby <rod@whitby.id.au> | |
18 | * Maintainers: http://www.nslu2-linux.org/ | |
19 | * | |
20 | */ | |
2f8163ba | 21 | #include <linux/gpio.h> |
b7edc84a | 22 | #include <linux/if_ether.h> |
c7d1623e RW |
23 | #include <linux/irq.h> |
24 | #include <linux/jiffies.h> | |
25 | #include <linux/timer.h> | |
3145d8a6 RW |
26 | #include <linux/serial.h> |
27 | #include <linux/serial_8250.h> | |
df6934b3 | 28 | #include <linux/leds.h> |
c7d1623e | 29 | #include <linux/reboot.h> |
400d8231 | 30 | #include <linux/i2c.h> |
b2e63555 | 31 | #include <linux/gpio/machine.h> |
fced80c7 | 32 | #include <linux/io.h> |
3145d8a6 RW |
33 | #include <asm/mach-types.h> |
34 | #include <asm/mach/arch.h> | |
35 | #include <asm/mach/flash.h> | |
36 | ||
dc8ef8cd LW |
37 | #include "irqs.h" |
38 | ||
23fa6846 KH |
39 | #define NAS100D_SDA_PIN 5 |
40 | #define NAS100D_SCL_PIN 6 | |
41 | ||
42 | /* Buttons */ | |
43 | #define NAS100D_PB_GPIO 14 /* power button */ | |
44 | #define NAS100D_RB_GPIO 4 /* reset button */ | |
45 | ||
46 | /* Power control */ | |
47 | #define NAS100D_PO_GPIO 12 /* power off */ | |
48 | ||
49 | /* LEDs */ | |
50 | #define NAS100D_LED_WLAN_GPIO 0 | |
51 | #define NAS100D_LED_DISK_GPIO 3 | |
52 | #define NAS100D_LED_PWR_GPIO 15 | |
53 | ||
3145d8a6 RW |
54 | static struct flash_platform_data nas100d_flash_data = { |
55 | .map_name = "cfi_probe", | |
56 | .width = 2, | |
57 | }; | |
58 | ||
59 | static struct resource nas100d_flash_resource = { | |
3145d8a6 RW |
60 | .flags = IORESOURCE_MEM, |
61 | }; | |
62 | ||
63 | static struct platform_device nas100d_flash = { | |
64 | .name = "IXP4XX-Flash", | |
65 | .id = 0, | |
66 | .dev.platform_data = &nas100d_flash_data, | |
67 | .num_resources = 1, | |
68 | .resource = &nas100d_flash_resource, | |
69 | }; | |
70 | ||
400d8231 RW |
71 | static struct i2c_board_info __initdata nas100d_i2c_board_info [] = { |
72 | { | |
3760f736 | 73 | I2C_BOARD_INFO("pcf8563", 0x51), |
400d8231 RW |
74 | }, |
75 | }; | |
76 | ||
1208ebf2 | 77 | static struct gpio_led nas100d_led_pins[] = { |
df6934b3 | 78 | { |
6c152bee | 79 | .name = "nas100d:green:wlan", |
1208ebf2 RW |
80 | .gpio = NAS100D_LED_WLAN_GPIO, |
81 | .active_low = true, | |
df6934b3 RW |
82 | }, |
83 | { | |
6c152bee | 84 | .name = "nas100d:blue:power", /* (off=flashing) */ |
1208ebf2 RW |
85 | .gpio = NAS100D_LED_PWR_GPIO, |
86 | .active_low = true, | |
df6934b3 RW |
87 | }, |
88 | { | |
6c152bee | 89 | .name = "nas100d:yellow:disk", |
1208ebf2 RW |
90 | .gpio = NAS100D_LED_DISK_GPIO, |
91 | .active_low = true, | |
df6934b3 RW |
92 | }, |
93 | }; | |
94 | ||
1208ebf2 RW |
95 | static struct gpio_led_platform_data nas100d_led_data = { |
96 | .num_leds = ARRAY_SIZE(nas100d_led_pins), | |
97 | .leds = nas100d_led_pins, | |
98 | }; | |
99 | ||
df6934b3 | 100 | static struct platform_device nas100d_leds = { |
1208ebf2 | 101 | .name = "leds-gpio", |
df6934b3 | 102 | .id = -1, |
1208ebf2 | 103 | .dev.platform_data = &nas100d_led_data, |
df6934b3 | 104 | }; |
df6934b3 | 105 | |
b2e63555 | 106 | static struct gpiod_lookup_table nas100d_i2c_gpiod_table = { |
f59c303b | 107 | .dev_id = "i2c-gpio.0", |
b2e63555 LW |
108 | .table = { |
109 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SDA_PIN, | |
4d0ce62c | 110 | NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 111 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SCL_PIN, |
4d0ce62c | 112 | NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 113 | }, |
3145d8a6 RW |
114 | }; |
115 | ||
5a4a2387 MLJ |
116 | static struct platform_device nas100d_i2c_gpio = { |
117 | .name = "i2c-gpio", | |
3145d8a6 | 118 | .id = 0, |
5a4a2387 | 119 | .dev = { |
b2e63555 | 120 | .platform_data = NULL, |
5a4a2387 | 121 | }, |
3145d8a6 RW |
122 | }; |
123 | ||
124 | static struct resource nas100d_uart_resources[] = { | |
125 | { | |
126 | .start = IXP4XX_UART1_BASE_PHYS, | |
127 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
128 | .flags = IORESOURCE_MEM, | |
129 | }, | |
130 | { | |
131 | .start = IXP4XX_UART2_BASE_PHYS, | |
132 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
133 | .flags = IORESOURCE_MEM, | |
134 | } | |
135 | }; | |
136 | ||
137 | static struct plat_serial8250_port nas100d_uart_data[] = { | |
138 | { | |
139 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
140 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
141 | .irq = IRQ_IXP4XX_UART1, | |
142 | .flags = UPF_BOOT_AUTOCONF, | |
143 | .iotype = UPIO_MEM, | |
144 | .regshift = 2, | |
145 | .uartclk = IXP4XX_UART_XTAL, | |
146 | }, | |
147 | { | |
148 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
149 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
150 | .irq = IRQ_IXP4XX_UART2, | |
151 | .flags = UPF_BOOT_AUTOCONF, | |
152 | .iotype = UPIO_MEM, | |
153 | .regshift = 2, | |
154 | .uartclk = IXP4XX_UART_XTAL, | |
155 | }, | |
156 | { } | |
157 | }; | |
158 | ||
159 | static struct platform_device nas100d_uart = { | |
160 | .name = "serial8250", | |
161 | .id = PLAT8250_DEV_PLATFORM, | |
162 | .dev.platform_data = nas100d_uart_data, | |
163 | .num_resources = 2, | |
164 | .resource = nas100d_uart_resources, | |
165 | }; | |
166 | ||
b7edc84a RW |
167 | /* Built-in 10/100 Ethernet MAC interfaces */ |
168 | static struct eth_plat_info nas100d_plat_eth[] = { | |
169 | { | |
170 | .phy = 0, | |
171 | .rxq = 3, | |
172 | .txreadyq = 20, | |
173 | } | |
174 | }; | |
175 | ||
176 | static struct platform_device nas100d_eth[] = { | |
177 | { | |
178 | .name = "ixp4xx_eth", | |
179 | .id = IXP4XX_ETH_NPEB, | |
180 | .dev.platform_data = nas100d_plat_eth, | |
181 | } | |
182 | }; | |
183 | ||
3145d8a6 | 184 | static struct platform_device *nas100d_devices[] __initdata = { |
5a4a2387 | 185 | &nas100d_i2c_gpio, |
3145d8a6 | 186 | &nas100d_flash, |
df6934b3 | 187 | &nas100d_leds, |
b7edc84a | 188 | &nas100d_eth[0], |
3145d8a6 RW |
189 | }; |
190 | ||
191 | static void nas100d_power_off(void) | |
192 | { | |
193 | /* This causes the box to drop the power and go dead. */ | |
194 | ||
8040dd09 LW |
195 | /* enable the pwr cntl gpio and assert power off */ |
196 | gpio_direction_output(NAS100D_PO_GPIO, 1); | |
3145d8a6 RW |
197 | } |
198 | ||
c7d1623e RW |
199 | /* This is used to make sure the power-button pusher is serious. The button |
200 | * must be held until the value of this counter reaches zero. | |
201 | */ | |
202 | static int power_button_countdown; | |
203 | ||
204 | /* Must hold the button down for at least this many counts to be processed */ | |
205 | #define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ | |
206 | ||
24ed960a | 207 | static void nas100d_power_handler(struct timer_list *unused); |
1d27e3e2 | 208 | static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler); |
c7d1623e | 209 | |
24ed960a | 210 | static void nas100d_power_handler(struct timer_list *unused) |
c7d1623e RW |
211 | { |
212 | /* This routine is called twice per second to check the | |
213 | * state of the power button. | |
214 | */ | |
215 | ||
216 | if (gpio_get_value(NAS100D_PB_GPIO)) { | |
217 | ||
218 | /* IO Pin is 1 (button pushed) */ | |
219 | if (power_button_countdown > 0) | |
220 | power_button_countdown--; | |
221 | ||
222 | } else { | |
223 | ||
224 | /* Done on button release, to allow for auto-power-on mods. */ | |
225 | if (power_button_countdown == 0) { | |
226 | /* Signal init to do the ctrlaltdel action, | |
227 | * this will bypass init if it hasn't started | |
228 | * and do a kernel_restart. | |
229 | */ | |
230 | ctrl_alt_del(); | |
231 | ||
232 | /* Change the state of the power LED to "blink" */ | |
8040dd09 | 233 | gpio_set_value(NAS100D_LED_PWR_GPIO, 0); |
c7d1623e RW |
234 | } else { |
235 | power_button_countdown = PBUTTON_HOLDDOWN_COUNT; | |
236 | } | |
237 | } | |
238 | ||
239 | mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); | |
240 | } | |
241 | ||
242 | static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) | |
243 | { | |
244 | /* This is the paper-clip reset, it shuts the machine down directly. */ | |
245 | machine_power_off(); | |
246 | ||
247 | return IRQ_HANDLED; | |
248 | } | |
249 | ||
8040dd09 LW |
250 | static int __init nas100d_gpio_init(void) |
251 | { | |
252 | if (!machine_is_nas100d()) | |
253 | return 0; | |
254 | ||
255 | /* | |
256 | * The power button on the Iomega NAS100d is on GPIO 14, but | |
257 | * it cannot handle interrupts on that GPIO line. So we'll | |
258 | * have to poll it with a kernel timer. | |
259 | */ | |
260 | ||
261 | /* Request the power off GPIO */ | |
262 | gpio_request(NAS100D_PO_GPIO, "power off"); | |
263 | ||
264 | /* Make sure that the power button GPIO is set up as an input */ | |
265 | gpio_request(NAS100D_PB_GPIO, "power button"); | |
266 | gpio_direction_input(NAS100D_PB_GPIO); | |
267 | ||
268 | /* Set the initial value for the power button IRQ handler */ | |
269 | power_button_countdown = PBUTTON_HOLDDOWN_COUNT; | |
270 | ||
271 | mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); | |
272 | ||
273 | return 0; | |
274 | } | |
275 | device_initcall(nas100d_gpio_init); | |
276 | ||
3145d8a6 RW |
277 | static void __init nas100d_init(void) |
278 | { | |
b7edc84a RW |
279 | uint8_t __iomem *f; |
280 | int i; | |
281 | ||
3145d8a6 RW |
282 | ixp4xx_sys_init(); |
283 | ||
dcc8fa50 AZ |
284 | /* gpio 14 and 15 are _not_ clocks */ |
285 | *IXP4XX_GPIO_GPCLKR = 0; | |
286 | ||
54e269ea DS |
287 | nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
288 | nas100d_flash_resource.end = | |
289 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
290 | ||
b2e63555 | 291 | gpiod_add_lookup_table(&nas100d_i2c_gpiod_table); |
400d8231 RW |
292 | i2c_register_board_info(0, nas100d_i2c_board_info, |
293 | ARRAY_SIZE(nas100d_i2c_board_info)); | |
294 | ||
cc50a0df MLJ |
295 | /* |
296 | * This is only useful on a modified machine, but it is valuable | |
df6934b3 RW |
297 | * to have it first in order to see debug messages, and so that |
298 | * it does *not* get removed if platform_add_devices fails! | |
299 | */ | |
300 | (void)platform_device_register(&nas100d_uart); | |
301 | ||
3145d8a6 | 302 | platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices)); |
b7edc84a | 303 | |
c7d1623e RW |
304 | pm_power_off = nas100d_power_off; |
305 | ||
306 | if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler, | |
1ee6564d | 307 | IRQF_TRIGGER_LOW, "NAS100D reset button", NULL) < 0) { |
c7d1623e RW |
308 | |
309 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
310 | gpio_to_irq(NAS100D_RB_GPIO)); | |
311 | } | |
312 | ||
b7edc84a RW |
313 | /* |
314 | * Map in a portion of the flash and read the MAC address. | |
315 | * Since it is stored in BE in the flash itself, we need to | |
316 | * byteswap it if we're in LE mode. | |
317 | */ | |
318 | f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000); | |
319 | if (f) { | |
320 | for (i = 0; i < 6; i++) | |
321 | #ifdef __ARMEB__ | |
322 | nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i); | |
323 | #else | |
324 | nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3)); | |
325 | #endif | |
326 | iounmap(f); | |
327 | } | |
e174961c JB |
328 | printk(KERN_INFO "NAS100D: Using MAC address %pM for port 0\n", |
329 | nas100d_plat_eth[0].hwaddr); | |
b7edc84a | 330 | |
3145d8a6 RW |
331 | } |
332 | ||
333 | MACHINE_START(NAS100D, "Iomega NAS 100d") | |
334 | /* Maintainer: www.nslu2-linux.org */ | |
e022c729 | 335 | .atag_offset = 0x100, |
3145d8a6 | 336 | .map_io = ixp4xx_map_io, |
f449588c | 337 | .init_early = ixp4xx_init_early, |
3145d8a6 | 338 | .init_irq = ixp4xx_init_irq, |
6bb27d73 | 339 | .init_time = ixp4xx_timer_init, |
3145d8a6 | 340 | .init_machine = nas100d_init, |
7553ee77 NP |
341 | #if defined(CONFIG_PCI) |
342 | .dma_zone_size = SZ_64M, | |
343 | #endif | |
d1b860fb | 344 | .restart = ixp4xx_restart, |
3145d8a6 | 345 | MACHINE_END |