]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a7918f39 AZ |
2 | /* |
3 | * arch/arm/mach-ixp4xx/nslu2-setup.c | |
4 | * | |
5 | * NSLU2 board-setup | |
6 | * | |
0929ac3e RW |
7 | * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> |
8 | * | |
9 | * based on ixdp425-setup.c: | |
a7918f39 | 10 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
0929ac3e RW |
11 | * based on nslu2-power.c: |
12 | * Copyright (C) 2005 Tower Technologies | |
a7918f39 AZ |
13 | * |
14 | * Author: Mark Rakes <mrakes at mac.com> | |
e22b04fb | 15 | * Author: Rod Whitby <rod@whitby.id.au> |
0929ac3e | 16 | * Author: Alessandro Zummo <a.zummo@towertech.it> |
a7918f39 AZ |
17 | * Maintainers: http://www.nslu2-linux.org/ |
18 | * | |
a7918f39 | 19 | */ |
2f8163ba | 20 | #include <linux/gpio.h> |
b7edc84a | 21 | #include <linux/if_ether.h> |
0929ac3e | 22 | #include <linux/irq.h> |
a7918f39 AZ |
23 | #include <linux/serial.h> |
24 | #include <linux/serial_8250.h> | |
e22b04fb | 25 | #include <linux/leds.h> |
0929ac3e | 26 | #include <linux/reboot.h> |
e28067d5 | 27 | #include <linux/i2c.h> |
b2e63555 | 28 | #include <linux/gpio/machine.h> |
fced80c7 | 29 | #include <linux/io.h> |
a7918f39 AZ |
30 | #include <asm/mach-types.h> |
31 | #include <asm/mach/arch.h> | |
32 | #include <asm/mach/flash.h> | |
435c5da0 | 33 | #include <asm/mach/time.h> |
a7918f39 | 34 | |
dc8ef8cd LW |
35 | #include "irqs.h" |
36 | ||
c1117c63 KH |
37 | #define NSLU2_SDA_PIN 7 |
38 | #define NSLU2_SCL_PIN 6 | |
39 | ||
40 | /* NSLU2 Timer */ | |
41 | #define NSLU2_FREQ 66000000 | |
42 | ||
43 | /* Buttons */ | |
44 | #define NSLU2_PB_GPIO 5 /* power button */ | |
45 | #define NSLU2_PO_GPIO 8 /* power off */ | |
46 | #define NSLU2_RB_GPIO 12 /* reset button */ | |
47 | ||
48 | /* Buzzer */ | |
49 | #define NSLU2_GPIO_BUZZ 4 | |
50 | ||
51 | /* LEDs */ | |
52 | #define NSLU2_LED_RED_GPIO 0 | |
53 | #define NSLU2_LED_GRN_GPIO 1 | |
54 | #define NSLU2_LED_DISK1_GPIO 3 | |
55 | #define NSLU2_LED_DISK2_GPIO 2 | |
56 | ||
a7918f39 AZ |
57 | static struct flash_platform_data nslu2_flash_data = { |
58 | .map_name = "cfi_probe", | |
59 | .width = 2, | |
60 | }; | |
61 | ||
62 | static struct resource nslu2_flash_resource = { | |
a7918f39 AZ |
63 | .flags = IORESOURCE_MEM, |
64 | }; | |
65 | ||
66 | static struct platform_device nslu2_flash = { | |
67 | .name = "IXP4XX-Flash", | |
68 | .id = 0, | |
69 | .dev.platform_data = &nslu2_flash_data, | |
70 | .num_resources = 1, | |
71 | .resource = &nslu2_flash_resource, | |
72 | }; | |
73 | ||
b2e63555 | 74 | static struct gpiod_lookup_table nslu2_i2c_gpiod_table = { |
f59c303b | 75 | .dev_id = "i2c-gpio.0", |
b2e63555 LW |
76 | .table = { |
77 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SDA_PIN, | |
4d0ce62c | 78 | NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 79 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SCL_PIN, |
4d0ce62c | 80 | NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 81 | }, |
a7918f39 AZ |
82 | }; |
83 | ||
e28067d5 RW |
84 | static struct i2c_board_info __initdata nslu2_i2c_board_info [] = { |
85 | { | |
3760f736 | 86 | I2C_BOARD_INFO("x1205", 0x6f), |
e28067d5 RW |
87 | }, |
88 | }; | |
89 | ||
1208ebf2 | 90 | static struct gpio_led nslu2_led_pins[] = { |
e22b04fb | 91 | { |
6c152bee | 92 | .name = "nslu2:green:ready", |
1208ebf2 | 93 | .gpio = NSLU2_LED_GRN_GPIO, |
e22b04fb RW |
94 | }, |
95 | { | |
6c152bee | 96 | .name = "nslu2:red:status", |
1208ebf2 | 97 | .gpio = NSLU2_LED_RED_GPIO, |
e22b04fb RW |
98 | }, |
99 | { | |
6c152bee | 100 | .name = "nslu2:green:disk-1", |
1208ebf2 RW |
101 | .gpio = NSLU2_LED_DISK1_GPIO, |
102 | .active_low = true, | |
e22b04fb RW |
103 | }, |
104 | { | |
6c152bee | 105 | .name = "nslu2:green:disk-2", |
1208ebf2 RW |
106 | .gpio = NSLU2_LED_DISK2_GPIO, |
107 | .active_low = true, | |
e22b04fb RW |
108 | }, |
109 | }; | |
110 | ||
1208ebf2 RW |
111 | static struct gpio_led_platform_data nslu2_led_data = { |
112 | .num_leds = ARRAY_SIZE(nslu2_led_pins), | |
113 | .leds = nslu2_led_pins, | |
114 | }; | |
115 | ||
e22b04fb | 116 | static struct platform_device nslu2_leds = { |
1208ebf2 | 117 | .name = "leds-gpio", |
e22b04fb | 118 | .id = -1, |
1208ebf2 | 119 | .dev.platform_data = &nslu2_led_data, |
e22b04fb | 120 | }; |
e22b04fb | 121 | |
5a4a2387 MLJ |
122 | static struct platform_device nslu2_i2c_gpio = { |
123 | .name = "i2c-gpio", | |
a7918f39 | 124 | .id = 0, |
5a4a2387 | 125 | .dev = { |
b2e63555 | 126 | .platform_data = NULL, |
5a4a2387 | 127 | }, |
a7918f39 AZ |
128 | }; |
129 | ||
075df31a LW |
130 | static struct resource nslu2_beeper_resources[] = { |
131 | { | |
132 | .start = IRQ_IXP4XX_TIMER2, | |
133 | .flags = IORESOURCE_IRQ, | |
134 | }, | |
135 | }; | |
136 | ||
bc66d449 AZ |
137 | static struct platform_device nslu2_beeper = { |
138 | .name = "ixp4xx-beeper", | |
139 | .id = NSLU2_GPIO_BUZZ, | |
075df31a LW |
140 | .resource = nslu2_beeper_resources, |
141 | .num_resources = ARRAY_SIZE(nslu2_beeper_resources), | |
bc66d449 AZ |
142 | }; |
143 | ||
a7918f39 AZ |
144 | static struct resource nslu2_uart_resources[] = { |
145 | { | |
146 | .start = IXP4XX_UART1_BASE_PHYS, | |
147 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
148 | .flags = IORESOURCE_MEM, | |
149 | }, | |
150 | { | |
151 | .start = IXP4XX_UART2_BASE_PHYS, | |
152 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
153 | .flags = IORESOURCE_MEM, | |
154 | } | |
155 | }; | |
156 | ||
157 | static struct plat_serial8250_port nslu2_uart_data[] = { | |
158 | { | |
159 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
160 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
161 | .irq = IRQ_IXP4XX_UART1, | |
162 | .flags = UPF_BOOT_AUTOCONF, | |
163 | .iotype = UPIO_MEM, | |
164 | .regshift = 2, | |
165 | .uartclk = IXP4XX_UART_XTAL, | |
166 | }, | |
167 | { | |
168 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
169 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
170 | .irq = IRQ_IXP4XX_UART2, | |
171 | .flags = UPF_BOOT_AUTOCONF, | |
172 | .iotype = UPIO_MEM, | |
173 | .regshift = 2, | |
174 | .uartclk = IXP4XX_UART_XTAL, | |
175 | }, | |
176 | { } | |
177 | }; | |
178 | ||
179 | static struct platform_device nslu2_uart = { | |
180 | .name = "serial8250", | |
181 | .id = PLAT8250_DEV_PLATFORM, | |
182 | .dev.platform_data = nslu2_uart_data, | |
183 | .num_resources = 2, | |
184 | .resource = nslu2_uart_resources, | |
185 | }; | |
186 | ||
b7edc84a RW |
187 | /* Built-in 10/100 Ethernet MAC interfaces */ |
188 | static struct eth_plat_info nslu2_plat_eth[] = { | |
189 | { | |
190 | .phy = 1, | |
191 | .rxq = 3, | |
192 | .txreadyq = 20, | |
193 | } | |
194 | }; | |
195 | ||
196 | static struct platform_device nslu2_eth[] = { | |
197 | { | |
198 | .name = "ixp4xx_eth", | |
199 | .id = IXP4XX_ETH_NPEB, | |
200 | .dev.platform_data = nslu2_plat_eth, | |
201 | } | |
202 | }; | |
203 | ||
a7918f39 | 204 | static struct platform_device *nslu2_devices[] __initdata = { |
5a4a2387 | 205 | &nslu2_i2c_gpio, |
a7918f39 | 206 | &nslu2_flash, |
bc66d449 | 207 | &nslu2_beeper, |
e22b04fb | 208 | &nslu2_leds, |
b7edc84a | 209 | &nslu2_eth[0], |
a7918f39 AZ |
210 | }; |
211 | ||
212 | static void nslu2_power_off(void) | |
213 | { | |
214 | /* This causes the box to drop the power and go dead. */ | |
215 | ||
8040dd09 LW |
216 | /* enable the pwr cntl gpio and assert power off */ |
217 | gpio_direction_output(NSLU2_PO_GPIO, 1); | |
a7918f39 AZ |
218 | } |
219 | ||
0929ac3e RW |
220 | static irqreturn_t nslu2_power_handler(int irq, void *dev_id) |
221 | { | |
222 | /* Signal init to do the ctrlaltdel action, this will bypass init if | |
223 | * it hasn't started and do a kernel_restart. | |
224 | */ | |
225 | ctrl_alt_del(); | |
226 | ||
227 | return IRQ_HANDLED; | |
228 | } | |
229 | ||
230 | static irqreturn_t nslu2_reset_handler(int irq, void *dev_id) | |
231 | { | |
232 | /* This is the paper-clip reset, it shuts the machine down directly. | |
233 | */ | |
234 | machine_power_off(); | |
235 | ||
236 | return IRQ_HANDLED; | |
237 | } | |
238 | ||
8040dd09 LW |
239 | static int __init nslu2_gpio_init(void) |
240 | { | |
241 | if (!machine_is_nslu2()) | |
242 | return 0; | |
243 | ||
244 | /* Request the power off GPIO */ | |
245 | return gpio_request(NSLU2_PO_GPIO, "power off"); | |
246 | } | |
247 | device_initcall(nslu2_gpio_init); | |
248 | ||
435c5da0 | 249 | static void __init nslu2_timer_init(void) |
a7918f39 | 250 | { |
435c5da0 MLJ |
251 | /* The xtal on this machine is non-standard. */ |
252 | ixp4xx_timer_freq = NSLU2_FREQ; | |
253 | ||
254 | /* Call standard timer_init function. */ | |
255 | ixp4xx_timer_init(); | |
256 | } | |
84904d0e | 257 | |
435c5da0 MLJ |
258 | static void __init nslu2_init(void) |
259 | { | |
b7edc84a RW |
260 | uint8_t __iomem *f; |
261 | int i; | |
262 | ||
a7918f39 AZ |
263 | ixp4xx_sys_init(); |
264 | ||
3dfaf7a6 MM |
265 | nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
266 | nslu2_flash_resource.end = | |
267 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
268 | ||
b2e63555 | 269 | gpiod_add_lookup_table(&nslu2_i2c_gpiod_table); |
e28067d5 RW |
270 | i2c_register_board_info(0, nslu2_i2c_board_info, |
271 | ARRAY_SIZE(nslu2_i2c_board_info)); | |
272 | ||
cc50a0df MLJ |
273 | /* |
274 | * This is only useful on a modified machine, but it is valuable | |
e22b04fb RW |
275 | * to have it first in order to see debug messages, and so that |
276 | * it does *not* get removed if platform_add_devices fails! | |
277 | */ | |
278 | (void)platform_device_register(&nslu2_uart); | |
279 | ||
a7918f39 | 280 | platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices)); |
b7edc84a | 281 | |
0929ac3e RW |
282 | pm_power_off = nslu2_power_off; |
283 | ||
284 | if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler, | |
1ee6564d | 285 | IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) { |
0929ac3e RW |
286 | |
287 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
288 | gpio_to_irq(NSLU2_RB_GPIO)); | |
289 | } | |
290 | ||
291 | if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler, | |
1ee6564d | 292 | IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) { |
0929ac3e RW |
293 | |
294 | printk(KERN_DEBUG "Power Button IRQ %d not available\n", | |
295 | gpio_to_irq(NSLU2_PB_GPIO)); | |
296 | } | |
b7edc84a RW |
297 | |
298 | /* | |
299 | * Map in a portion of the flash and read the MAC address. | |
300 | * Since it is stored in BE in the flash itself, we need to | |
301 | * byteswap it if we're in LE mode. | |
302 | */ | |
303 | f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000); | |
304 | if (f) { | |
305 | for (i = 0; i < 6; i++) | |
306 | #ifdef __ARMEB__ | |
307 | nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i); | |
308 | #else | |
309 | nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3)); | |
310 | #endif | |
311 | iounmap(f); | |
312 | } | |
e174961c JB |
313 | printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n", |
314 | nslu2_plat_eth[0].hwaddr); | |
b7edc84a | 315 | |
a7918f39 AZ |
316 | } |
317 | ||
318 | MACHINE_START(NSLU2, "Linksys NSLU2") | |
319 | /* Maintainer: www.nslu2-linux.org */ | |
e022c729 | 320 | .atag_offset = 0x100, |
a7918f39 | 321 | .map_io = ixp4xx_map_io, |
f449588c | 322 | .init_early = ixp4xx_init_early, |
a7918f39 | 323 | .init_irq = ixp4xx_init_irq, |
6bb27d73 | 324 | .init_time = nslu2_timer_init, |
a7918f39 | 325 | .init_machine = nslu2_init, |
7553ee77 NP |
326 | #if defined(CONFIG_PCI) |
327 | .dma_zone_size = SZ_64M, | |
328 | #endif | |
d1b860fb | 329 | .restart = ixp4xx_restart, |
a7918f39 | 330 | MACHINE_END |