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Alessandro Zummoa7918f32005-11-10 14:05:04 +00001/*
2 * arch/arm/mach-ixp4xx/nslu2-setup.c
3 *
4 * NSLU2 board-setup
5 *
Rod Whitby0929ac32008-02-03 12:05:42 +01006 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
7 *
8 * based on ixdp425-setup.c:
Alessandro Zummoa7918f32005-11-10 14:05:04 +00009 * Copyright (C) 2003-2004 MontaVista Software, Inc.
Rod Whitby0929ac32008-02-03 12:05:42 +010010 * based on nslu2-power.c:
11 * Copyright (C) 2005 Tower Technologies
Alessandro Zummoa7918f32005-11-10 14:05:04 +000012 *
13 * Author: Mark Rakes <mrakes at mac.com>
Rod Whitbye22b04f2006-06-22 22:21:02 +010014 * Author: Rod Whitby <rod@whitby.id.au>
Rod Whitby0929ac32008-02-03 12:05:42 +010015 * Author: Alessandro Zummo <a.zummo@towertech.it>
Alessandro Zummoa7918f32005-11-10 14:05:04 +000016 * Maintainers: http://www.nslu2-linux.org/
17 *
Alessandro Zummoa7918f32005-11-10 14:05:04 +000018 */
19
Rod Whitbyb7edc842008-02-02 00:04:05 +010020#include <linux/if_ether.h>
Rod Whitby0929ac32008-02-03 12:05:42 +010021#include <linux/irq.h>
Alessandro Zummoa7918f32005-11-10 14:05:04 +000022#include <linux/serial.h>
23#include <linux/serial_8250.h>
Rod Whitbye22b04f2006-06-22 22:21:02 +010024#include <linux/leds.h>
Rod Whitby0929ac32008-02-03 12:05:42 +010025#include <linux/reboot.h>
Rod Whitbye28067d2008-01-29 00:36:12 +010026#include <linux/i2c.h>
Michael-Luke Jones5a4a2382008-01-27 18:14:46 +010027#include <linux/i2c-gpio.h>
Russell Kingfced80c2008-09-06 12:10:45 +010028#include <linux/io.h>
Alessandro Zummoa7918f32005-11-10 14:05:04 +000029#include <asm/mach-types.h>
30#include <asm/mach/arch.h>
31#include <asm/mach/flash.h>
Michael-Luke Jones435c5da2007-05-23 22:38:45 +010032#include <asm/mach/time.h>
Rod Whitby0929ac32008-02-03 12:05:42 +010033#include <asm/gpio.h>
Alessandro Zummoa7918f32005-11-10 14:05:04 +000034
Krzysztof HaƂasac1117c62009-11-16 16:02:02 +010035#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
Alessandro Zummoa7918f32005-11-10 14:05:04 +000055static struct flash_platform_data nslu2_flash_data = {
56 .map_name = "cfi_probe",
57 .width = 2,
58};
59
60static struct resource nslu2_flash_resource = {
Alessandro Zummoa7918f32005-11-10 14:05:04 +000061 .flags = IORESOURCE_MEM,
62};
63
64static 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
Michael-Luke Jones5a4a2382008-01-27 18:14:46 +010072static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
Alessandro Zummoa7918f32005-11-10 14:05:04 +000073 .sda_pin = NSLU2_SDA_PIN,
74 .scl_pin = NSLU2_SCL_PIN,
75};
76
Rod Whitbye28067d2008-01-29 00:36:12 +010077static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
78 {
Jean Delvare3760f732008-04-29 23:11:40 +020079 I2C_BOARD_INFO("x1205", 0x6f),
Rod Whitbye28067d2008-01-29 00:36:12 +010080 },
81};
82
Rod Whitby1208ebf2008-02-02 00:03:56 +010083static struct gpio_led nslu2_led_pins[] = {
Rod Whitbye22b04f2006-06-22 22:21:02 +010084 {
Richard Purdie6c152be2007-10-31 15:00:07 +010085 .name = "nslu2:green:ready",
Rod Whitby1208ebf2008-02-02 00:03:56 +010086 .gpio = NSLU2_LED_GRN_GPIO,
Rod Whitbye22b04f2006-06-22 22:21:02 +010087 },
88 {
Richard Purdie6c152be2007-10-31 15:00:07 +010089 .name = "nslu2:red:status",
Rod Whitby1208ebf2008-02-02 00:03:56 +010090 .gpio = NSLU2_LED_RED_GPIO,
Rod Whitbye22b04f2006-06-22 22:21:02 +010091 },
92 {
Richard Purdie6c152be2007-10-31 15:00:07 +010093 .name = "nslu2:green:disk-1",
Rod Whitby1208ebf2008-02-02 00:03:56 +010094 .gpio = NSLU2_LED_DISK1_GPIO,
95 .active_low = true,
Rod Whitbye22b04f2006-06-22 22:21:02 +010096 },
97 {
Richard Purdie6c152be2007-10-31 15:00:07 +010098 .name = "nslu2:green:disk-2",
Rod Whitby1208ebf2008-02-02 00:03:56 +010099 .gpio = NSLU2_LED_DISK2_GPIO,
100 .active_low = true,
Rod Whitbye22b04f2006-06-22 22:21:02 +0100101 },
102};
103
Rod Whitby1208ebf2008-02-02 00:03:56 +0100104static struct gpio_led_platform_data nslu2_led_data = {
105 .num_leds = ARRAY_SIZE(nslu2_led_pins),
106 .leds = nslu2_led_pins,
Rod Whitbye22b04f2006-06-22 22:21:02 +0100107};
Rod Whitby1208ebf2008-02-02 00:03:56 +0100108
109static struct platform_device nslu2_leds = {
110 .name = "leds-gpio",
111 .id = -1,
112 .dev.platform_data = &nslu2_led_data,
113};
Rod Whitbye22b04f2006-06-22 22:21:02 +0100114
Michael-Luke Jones5a4a2382008-01-27 18:14:46 +0100115static struct platform_device nslu2_i2c_gpio = {
116 .name = "i2c-gpio",
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000117 .id = 0,
Michael-Luke Jones5a4a2382008-01-27 18:14:46 +0100118 .dev = {
119 .platform_data = &nslu2_i2c_gpio_data,
120 },
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000121};
122
Alessandro Zummobc66d442006-02-22 21:12:06 +0000123static struct platform_device nslu2_beeper = {
124 .name = "ixp4xx-beeper",
125 .id = NSLU2_GPIO_BUZZ,
126 .num_resources = 0,
127};
128
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000129static 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
142static 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
164static 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
Rod Whitbyb7edc842008-02-02 00:04:05 +0100172/* Built-in 10/100 Ethernet MAC interfaces */
173static struct eth_plat_info nslu2_plat_eth[] = {
174 {
175 .phy = 1,
176 .rxq = 3,
177 .txreadyq = 20,
178 }
179};
180
181static 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
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000189static struct platform_device *nslu2_devices[] __initdata = {
Michael-Luke Jones5a4a2382008-01-27 18:14:46 +0100190 &nslu2_i2c_gpio,
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000191 &nslu2_flash,
Alessandro Zummobc66d442006-02-22 21:12:06 +0000192 &nslu2_beeper,
Rod Whitbye22b04f2006-06-22 22:21:02 +0100193 &nslu2_leds,
Rod Whitbyb7edc842008-02-02 00:04:05 +0100194 &nslu2_eth[0],
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000195};
196
197static 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
Rod Whitby0929ac32008-02-03 12:05:42 +0100208static 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
218static 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
Michael-Luke Jones435c5da2007-05-23 22:38:45 +0100227static 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
236static struct sys_timer nslu2_timer = {
237 .init = nslu2_timer_init,
238};
239
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000240static void __init nslu2_init(void)
241{
Rod Whitbyb7edc842008-02-02 00:04:05 +0100242 uint8_t __iomem *f;
243 int i;
244
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000245 ixp4xx_sys_init();
246
Martin Michlmayr3dfaf7a2006-02-16 22:36:12 +0000247 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
Rod Whitbye28067d2008-01-29 00:36:12 +0100251 i2c_register_board_info(0, nslu2_i2c_board_info,
252 ARRAY_SIZE(nslu2_i2c_board_info));
253
Michael-Luke Jonescc50a0d2007-05-23 22:41:53 +0100254 /*
255 * This is only useful on a modified machine, but it is valuable
Rod Whitbye22b04f2006-06-22 22:21:02 +0100256 * 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
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000261 platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
Rod Whitbyb7edc842008-02-02 00:04:05 +0100262
Rod Whitby0929ac32008-02-03 12:05:42 +0100263 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 }
Rod Whitbyb7edc842008-02-02 00:04:05 +0100280
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 }
Johannes Berge1749612008-10-27 15:59:26 -0700296 printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
297 nslu2_plat_eth[0].hwaddr);
Rod Whitbyb7edc842008-02-02 00:04:05 +0100298
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000299}
300
301MACHINE_START(NSLU2, "Linksys NSLU2")
302 /* Maintainer: www.nslu2-linux.org */
Nicolas Pitree022c722011-07-05 22:38:13 -0400303 .atag_offset = 0x100,
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000304 .map_io = ixp4xx_map_io,
305 .init_irq = ixp4xx_init_irq,
Michael-Luke Jones435c5da2007-05-23 22:38:45 +0100306 .timer = &nslu2_timer,
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000307 .init_machine = nslu2_init,
Nicolas Pitre7553ee72011-07-05 22:28:09 -0400308#if defined(CONFIG_PCI)
309 .dma_zone_size = SZ_64M,
310#endif
Alessandro Zummoa7918f32005-11-10 14:05:04 +0000311MACHINE_END