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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 | |
c1117c63 KH |
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 | ||
a7918f39 AZ |
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 = { | |
a7918f39 AZ |
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 | ||
b2e63555 | 72 | static struct gpiod_lookup_table nslu2_i2c_gpiod_table = { |
f59c303b | 73 | .dev_id = "i2c-gpio.0", |
b2e63555 LW |
74 | .table = { |
75 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SDA_PIN, | |
4d0ce62c | 76 | NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 77 | GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SCL_PIN, |
4d0ce62c | 78 | NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
b2e63555 | 79 | }, |
a7918f39 AZ |
80 | }; |
81 | ||
e28067d5 RW |
82 | static struct i2c_board_info __initdata nslu2_i2c_board_info [] = { |
83 | { | |
3760f736 | 84 | I2C_BOARD_INFO("x1205", 0x6f), |
e28067d5 RW |
85 | }, |
86 | }; | |
87 | ||
1208ebf2 | 88 | static struct gpio_led nslu2_led_pins[] = { |
e22b04fb | 89 | { |
6c152bee | 90 | .name = "nslu2:green:ready", |
1208ebf2 | 91 | .gpio = NSLU2_LED_GRN_GPIO, |
e22b04fb RW |
92 | }, |
93 | { | |
6c152bee | 94 | .name = "nslu2:red:status", |
1208ebf2 | 95 | .gpio = NSLU2_LED_RED_GPIO, |
e22b04fb RW |
96 | }, |
97 | { | |
6c152bee | 98 | .name = "nslu2:green:disk-1", |
1208ebf2 RW |
99 | .gpio = NSLU2_LED_DISK1_GPIO, |
100 | .active_low = true, | |
e22b04fb RW |
101 | }, |
102 | { | |
6c152bee | 103 | .name = "nslu2:green:disk-2", |
1208ebf2 RW |
104 | .gpio = NSLU2_LED_DISK2_GPIO, |
105 | .active_low = true, | |
e22b04fb RW |
106 | }, |
107 | }; | |
108 | ||
1208ebf2 RW |
109 | static struct gpio_led_platform_data nslu2_led_data = { |
110 | .num_leds = ARRAY_SIZE(nslu2_led_pins), | |
111 | .leds = nslu2_led_pins, | |
112 | }; | |
113 | ||
e22b04fb | 114 | static struct platform_device nslu2_leds = { |
1208ebf2 | 115 | .name = "leds-gpio", |
e22b04fb | 116 | .id = -1, |
1208ebf2 | 117 | .dev.platform_data = &nslu2_led_data, |
e22b04fb | 118 | }; |
e22b04fb | 119 | |
5a4a2387 MLJ |
120 | static struct platform_device nslu2_i2c_gpio = { |
121 | .name = "i2c-gpio", | |
a7918f39 | 122 | .id = 0, |
5a4a2387 | 123 | .dev = { |
b2e63555 | 124 | .platform_data = NULL, |
5a4a2387 | 125 | }, |
a7918f39 AZ |
126 | }; |
127 | ||
bc66d449 AZ |
128 | static struct platform_device nslu2_beeper = { |
129 | .name = "ixp4xx-beeper", | |
130 | .id = NSLU2_GPIO_BUZZ, | |
131 | .num_resources = 0, | |
132 | }; | |
133 | ||
a7918f39 AZ |
134 | static struct resource nslu2_uart_resources[] = { |
135 | { | |
136 | .start = IXP4XX_UART1_BASE_PHYS, | |
137 | .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, | |
138 | .flags = IORESOURCE_MEM, | |
139 | }, | |
140 | { | |
141 | .start = IXP4XX_UART2_BASE_PHYS, | |
142 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
143 | .flags = IORESOURCE_MEM, | |
144 | } | |
145 | }; | |
146 | ||
147 | static struct plat_serial8250_port nslu2_uart_data[] = { | |
148 | { | |
149 | .mapbase = IXP4XX_UART1_BASE_PHYS, | |
150 | .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, | |
151 | .irq = IRQ_IXP4XX_UART1, | |
152 | .flags = UPF_BOOT_AUTOCONF, | |
153 | .iotype = UPIO_MEM, | |
154 | .regshift = 2, | |
155 | .uartclk = IXP4XX_UART_XTAL, | |
156 | }, | |
157 | { | |
158 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
159 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
160 | .irq = IRQ_IXP4XX_UART2, | |
161 | .flags = UPF_BOOT_AUTOCONF, | |
162 | .iotype = UPIO_MEM, | |
163 | .regshift = 2, | |
164 | .uartclk = IXP4XX_UART_XTAL, | |
165 | }, | |
166 | { } | |
167 | }; | |
168 | ||
169 | static struct platform_device nslu2_uart = { | |
170 | .name = "serial8250", | |
171 | .id = PLAT8250_DEV_PLATFORM, | |
172 | .dev.platform_data = nslu2_uart_data, | |
173 | .num_resources = 2, | |
174 | .resource = nslu2_uart_resources, | |
175 | }; | |
176 | ||
b7edc84a RW |
177 | /* Built-in 10/100 Ethernet MAC interfaces */ |
178 | static struct eth_plat_info nslu2_plat_eth[] = { | |
179 | { | |
180 | .phy = 1, | |
181 | .rxq = 3, | |
182 | .txreadyq = 20, | |
183 | } | |
184 | }; | |
185 | ||
186 | static struct platform_device nslu2_eth[] = { | |
187 | { | |
188 | .name = "ixp4xx_eth", | |
189 | .id = IXP4XX_ETH_NPEB, | |
190 | .dev.platform_data = nslu2_plat_eth, | |
191 | } | |
192 | }; | |
193 | ||
a7918f39 | 194 | static struct platform_device *nslu2_devices[] __initdata = { |
5a4a2387 | 195 | &nslu2_i2c_gpio, |
a7918f39 | 196 | &nslu2_flash, |
bc66d449 | 197 | &nslu2_beeper, |
e22b04fb | 198 | &nslu2_leds, |
b7edc84a | 199 | &nslu2_eth[0], |
a7918f39 AZ |
200 | }; |
201 | ||
202 | static void nslu2_power_off(void) | |
203 | { | |
204 | /* This causes the box to drop the power and go dead. */ | |
205 | ||
8040dd09 LW |
206 | /* enable the pwr cntl gpio and assert power off */ |
207 | gpio_direction_output(NSLU2_PO_GPIO, 1); | |
a7918f39 AZ |
208 | } |
209 | ||
0929ac3e RW |
210 | static irqreturn_t nslu2_power_handler(int irq, void *dev_id) |
211 | { | |
212 | /* Signal init to do the ctrlaltdel action, this will bypass init if | |
213 | * it hasn't started and do a kernel_restart. | |
214 | */ | |
215 | ctrl_alt_del(); | |
216 | ||
217 | return IRQ_HANDLED; | |
218 | } | |
219 | ||
220 | static irqreturn_t nslu2_reset_handler(int irq, void *dev_id) | |
221 | { | |
222 | /* This is the paper-clip reset, it shuts the machine down directly. | |
223 | */ | |
224 | machine_power_off(); | |
225 | ||
226 | return IRQ_HANDLED; | |
227 | } | |
228 | ||
8040dd09 LW |
229 | static int __init nslu2_gpio_init(void) |
230 | { | |
231 | if (!machine_is_nslu2()) | |
232 | return 0; | |
233 | ||
234 | /* Request the power off GPIO */ | |
235 | return gpio_request(NSLU2_PO_GPIO, "power off"); | |
236 | } | |
237 | device_initcall(nslu2_gpio_init); | |
238 | ||
435c5da0 | 239 | static void __init nslu2_timer_init(void) |
a7918f39 | 240 | { |
435c5da0 MLJ |
241 | /* The xtal on this machine is non-standard. */ |
242 | ixp4xx_timer_freq = NSLU2_FREQ; | |
243 | ||
244 | /* Call standard timer_init function. */ | |
245 | ixp4xx_timer_init(); | |
246 | } | |
84904d0e | 247 | |
435c5da0 MLJ |
248 | static void __init nslu2_init(void) |
249 | { | |
b7edc84a RW |
250 | uint8_t __iomem *f; |
251 | int i; | |
252 | ||
a7918f39 AZ |
253 | ixp4xx_sys_init(); |
254 | ||
3dfaf7a6 MM |
255 | nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
256 | nslu2_flash_resource.end = | |
257 | IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; | |
258 | ||
b2e63555 | 259 | gpiod_add_lookup_table(&nslu2_i2c_gpiod_table); |
e28067d5 RW |
260 | i2c_register_board_info(0, nslu2_i2c_board_info, |
261 | ARRAY_SIZE(nslu2_i2c_board_info)); | |
262 | ||
cc50a0df MLJ |
263 | /* |
264 | * This is only useful on a modified machine, but it is valuable | |
e22b04fb RW |
265 | * to have it first in order to see debug messages, and so that |
266 | * it does *not* get removed if platform_add_devices fails! | |
267 | */ | |
268 | (void)platform_device_register(&nslu2_uart); | |
269 | ||
a7918f39 | 270 | platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices)); |
b7edc84a | 271 | |
0929ac3e RW |
272 | pm_power_off = nslu2_power_off; |
273 | ||
274 | if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler, | |
1ee6564d | 275 | IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) { |
0929ac3e RW |
276 | |
277 | printk(KERN_DEBUG "Reset Button IRQ %d not available\n", | |
278 | gpio_to_irq(NSLU2_RB_GPIO)); | |
279 | } | |
280 | ||
281 | if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler, | |
1ee6564d | 282 | IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) { |
0929ac3e RW |
283 | |
284 | printk(KERN_DEBUG "Power Button IRQ %d not available\n", | |
285 | gpio_to_irq(NSLU2_PB_GPIO)); | |
286 | } | |
b7edc84a RW |
287 | |
288 | /* | |
289 | * Map in a portion of the flash and read the MAC address. | |
290 | * Since it is stored in BE in the flash itself, we need to | |
291 | * byteswap it if we're in LE mode. | |
292 | */ | |
293 | f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000); | |
294 | if (f) { | |
295 | for (i = 0; i < 6; i++) | |
296 | #ifdef __ARMEB__ | |
297 | nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i); | |
298 | #else | |
299 | nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3)); | |
300 | #endif | |
301 | iounmap(f); | |
302 | } | |
e174961c JB |
303 | printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n", |
304 | nslu2_plat_eth[0].hwaddr); | |
b7edc84a | 305 | |
a7918f39 AZ |
306 | } |
307 | ||
308 | MACHINE_START(NSLU2, "Linksys NSLU2") | |
309 | /* Maintainer: www.nslu2-linux.org */ | |
e022c729 | 310 | .atag_offset = 0x100, |
a7918f39 | 311 | .map_io = ixp4xx_map_io, |
f449588c | 312 | .init_early = ixp4xx_init_early, |
a7918f39 | 313 | .init_irq = ixp4xx_init_irq, |
6bb27d73 | 314 | .init_time = nslu2_timer_init, |
a7918f39 | 315 | .init_machine = nslu2_init, |
7553ee77 NP |
316 | #if defined(CONFIG_PCI) |
317 | .dma_zone_size = SZ_64M, | |
318 | #endif | |
d1b860fb | 319 | .restart = ixp4xx_restart, |
a7918f39 | 320 | MACHINE_END |