1/*
  2 * arch/arm/mach-ixp4xx/nslu2-setup.c
  3 *
  4 * NSLU2 board-setup
  5 *
  6 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
  7 *
  8 * based on ixdp425-setup.c:
  9 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
 10 * based on nslu2-power.c:
 11 *	Copyright (C) 2005 Tower Technologies
 12 *
 13 * Author: Mark Rakes <mrakes at mac.com>
 14 * Author: Rod Whitby <rod@whitby.id.au>
 15 * Author: Alessandro Zummo <a.zummo@towertech.it>
 16 * Maintainers: http://www.nslu2-linux.org/
 17 *
 18 */
 19#include <linux/gpio.h>
 20#include <linux/if_ether.h>
 21#include <linux/irq.h>
 22#include <linux/serial.h>
 23#include <linux/serial_8250.h>
 24#include <linux/leds.h>
 25#include <linux/reboot.h>
 26#include <linux/i2c.h>
 27#include <linux/i2c-gpio.h>
 28#include <linux/io.h>
 29#include <asm/mach-types.h>
 30#include <asm/mach/arch.h>
 31#include <asm/mach/flash.h>
 32#include <asm/mach/time.h>
 33
 
 
 34#define NSLU2_SDA_PIN		7
 35#define NSLU2_SCL_PIN		6
 36
 37/* NSLU2 Timer */
 38#define NSLU2_FREQ 66000000
 39
 40/* Buttons */
 41#define NSLU2_PB_GPIO		5	/* power button */
 42#define NSLU2_PO_GPIO		8	/* power off */
 43#define NSLU2_RB_GPIO		12	/* reset button */
 44
 45/* Buzzer */
 46#define NSLU2_GPIO_BUZZ		4
 47
 48/* LEDs */
 49#define NSLU2_LED_RED_GPIO	0
 50#define NSLU2_LED_GRN_GPIO	1
 51#define NSLU2_LED_DISK1_GPIO	3
 52#define NSLU2_LED_DISK2_GPIO	2
 53
 54static struct flash_platform_data nslu2_flash_data = {
 55	.map_name		= "cfi_probe",
 56	.width			= 2,
 57};
 58
 59static struct resource nslu2_flash_resource = {
 60	.flags			= IORESOURCE_MEM,
 61};
 62
 63static struct platform_device nslu2_flash = {
 64	.name			= "IXP4XX-Flash",
 65	.id			= 0,
 66	.dev.platform_data	= &nslu2_flash_data,
 67	.num_resources		= 1,
 68	.resource		= &nslu2_flash_resource,
 69};
 70
 71static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
 72	.sda_pin		= NSLU2_SDA_PIN,
 73	.scl_pin		= NSLU2_SCL_PIN,
 
 
 
 
 
 74};
 75
 76static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
 77	{
 78		I2C_BOARD_INFO("x1205", 0x6f),
 79	},
 80};
 81
 82static struct gpio_led nslu2_led_pins[] = {
 83	{
 84		.name		= "nslu2:green:ready",
 85		.gpio		= NSLU2_LED_GRN_GPIO,
 86	},
 87	{
 88		.name		= "nslu2:red:status",
 89		.gpio		= NSLU2_LED_RED_GPIO,
 90	},
 91	{
 92		.name		= "nslu2:green:disk-1",
 93		.gpio		= NSLU2_LED_DISK1_GPIO,
 94		.active_low	= true,
 95	},
 96	{
 97		.name		= "nslu2:green:disk-2",
 98		.gpio		= NSLU2_LED_DISK2_GPIO,
 99		.active_low	= true,
100	},
101};
102
103static struct gpio_led_platform_data nslu2_led_data = {
104	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
105	.leds			= nslu2_led_pins,
106};
107
108static struct platform_device nslu2_leds = {
109	.name			= "leds-gpio",
110	.id			= -1,
111	.dev.platform_data	= &nslu2_led_data,
112};
113
114static struct platform_device nslu2_i2c_gpio = {
115	.name			= "i2c-gpio",
116	.id			= 0,
117	.dev	 = {
118		.platform_data	= &nslu2_i2c_gpio_data,
 
 
 
 
 
 
 
119	},
120};
121
122static struct platform_device nslu2_beeper = {
123	.name			= "ixp4xx-beeper",
124	.id			= NSLU2_GPIO_BUZZ,
125	.num_resources		= 0,
 
126};
127
128static struct resource nslu2_uart_resources[] = {
129	{
130		.start		= IXP4XX_UART1_BASE_PHYS,
131		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
132		.flags		= IORESOURCE_MEM,
133	},
134	{
135		.start		= IXP4XX_UART2_BASE_PHYS,
136		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
137		.flags		= IORESOURCE_MEM,
138	}
139};
140
141static struct plat_serial8250_port nslu2_uart_data[] = {
142	{
143		.mapbase	= IXP4XX_UART1_BASE_PHYS,
144		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
145		.irq		= IRQ_IXP4XX_UART1,
146		.flags		= UPF_BOOT_AUTOCONF,
147		.iotype		= UPIO_MEM,
148		.regshift	= 2,
149		.uartclk	= IXP4XX_UART_XTAL,
150	},
151	{
152		.mapbase	= IXP4XX_UART2_BASE_PHYS,
153		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
154		.irq		= IRQ_IXP4XX_UART2,
155		.flags		= UPF_BOOT_AUTOCONF,
156		.iotype		= UPIO_MEM,
157		.regshift	= 2,
158		.uartclk	= IXP4XX_UART_XTAL,
159	},
160	{ }
161};
162
163static struct platform_device nslu2_uart = {
164	.name			= "serial8250",
165	.id			= PLAT8250_DEV_PLATFORM,
166	.dev.platform_data	= nslu2_uart_data,
167	.num_resources		= 2,
168	.resource		= nslu2_uart_resources,
169};
170
171/* Built-in 10/100 Ethernet MAC interfaces */
 
 
 
 
 
 
 
 
172static struct eth_plat_info nslu2_plat_eth[] = {
173	{
174		.phy		= 1,
175		.rxq		= 3,
176		.txreadyq	= 20,
177	}
178};
179
180static struct platform_device nslu2_eth[] = {
181	{
182		.name			= "ixp4xx_eth",
183		.id			= IXP4XX_ETH_NPEB,
184		.dev.platform_data	= nslu2_plat_eth,
 
 
185	}
186};
187
188static struct platform_device *nslu2_devices[] __initdata = {
189	&nslu2_i2c_gpio,
190	&nslu2_flash,
191	&nslu2_beeper,
192	&nslu2_leds,
193	&nslu2_eth[0],
194};
195
196static void nslu2_power_off(void)
197{
198	/* This causes the box to drop the power and go dead. */
199
200	/* enable the pwr cntl gpio */
201	gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
202
203	/* do the deed */
204	gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
205}
206
207static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
208{
209	/* Signal init to do the ctrlaltdel action, this will bypass init if
210	 * it hasn't started and do a kernel_restart.
211	 */
212	ctrl_alt_del();
213
214	return IRQ_HANDLED;
215}
216
217static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
218{
219	/* This is the paper-clip reset, it shuts the machine down directly.
220	 */
221	machine_power_off();
222
223	return IRQ_HANDLED;
224}
225
 
 
 
 
 
 
 
 
 
 
226static void __init nslu2_timer_init(void)
227{
228    /* The xtal on this machine is non-standard. */
229    ixp4xx_timer_freq = NSLU2_FREQ;
230
231    /* Call standard timer_init function. */
232    ixp4xx_timer_init();
233}
234
235static struct sys_timer nslu2_timer = {
236    .init   = nslu2_timer_init,
237};
238
239static void __init nslu2_init(void)
240{
241	uint8_t __iomem *f;
242	int i;
243
244	ixp4xx_sys_init();
245
246	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
247	nslu2_flash_resource.end =
248		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
249
 
250	i2c_register_board_info(0, nslu2_i2c_board_info,
251				ARRAY_SIZE(nslu2_i2c_board_info));
252
253	/*
254	 * This is only useful on a modified machine, but it is valuable
255	 * to have it first in order to see debug messages, and so that
256	 * it does *not* get removed if platform_add_devices fails!
257	 */
258	(void)platform_device_register(&nslu2_uart);
259
260	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
261
262	pm_power_off = nslu2_power_off;
263
264	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
265		IRQF_DISABLED | IRQF_TRIGGER_LOW,
266		"NSLU2 reset button", NULL) < 0) {
267
268		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
269			gpio_to_irq(NSLU2_RB_GPIO));
270	}
271
272	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
273		IRQF_DISABLED | IRQF_TRIGGER_HIGH,
274		"NSLU2 power button", NULL) < 0) {
275
276		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
277			gpio_to_irq(NSLU2_PB_GPIO));
278	}
279
280	/*
281	 * Map in a portion of the flash and read the MAC address.
282	 * Since it is stored in BE in the flash itself, we need to
283	 * byteswap it if we're in LE mode.
284	 */
285	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
286	if (f) {
287		for (i = 0; i < 6; i++)
288#ifdef __ARMEB__
289			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
290#else
291			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
292#endif
293		iounmap(f);
294	}
295	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
296	       nslu2_plat_eth[0].hwaddr);
297
298}
299
300MACHINE_START(NSLU2, "Linksys NSLU2")
301	/* Maintainer: www.nslu2-linux.org */
302	.atag_offset	= 0x100,
303	.map_io		= ixp4xx_map_io,
304	.init_early	= ixp4xx_init_early,
305	.init_irq	= ixp4xx_init_irq,
306	.timer          = &nslu2_timer,
307	.init_machine	= nslu2_init,
308#if defined(CONFIG_PCI)
309	.dma_zone_size	= SZ_64M,
310#endif
311	.restart	= ixp4xx_restart,
312MACHINE_END

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * arch/arm/mach-ixp4xx/nslu2-setup.c
  4 *
  5 * NSLU2 board-setup
  6 *
  7 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
  8 *
  9 * based on ixdp425-setup.c:
 10 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
 11 * based on nslu2-power.c:
 12 *	Copyright (C) 2005 Tower Technologies
 13 *
 14 * Author: Mark Rakes <mrakes at mac.com>
 15 * Author: Rod Whitby <rod@whitby.id.au>
 16 * Author: Alessandro Zummo <a.zummo@towertech.it>
 17 * Maintainers: http://www.nslu2-linux.org/
 18 *
 19 */
 20#include <linux/gpio.h>
 21#include <linux/if_ether.h>
 22#include <linux/irq.h>
 23#include <linux/serial.h>
 24#include <linux/serial_8250.h>
 25#include <linux/leds.h>
 26#include <linux/reboot.h>
 27#include <linux/i2c.h>
 28#include <linux/gpio/machine.h>
 29#include <linux/io.h>
 30#include <asm/mach-types.h>
 31#include <asm/mach/arch.h>
 32#include <asm/mach/flash.h>
 33#include <asm/mach/time.h>
 34
 35#include "irqs.h"
 36
 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
 57static struct flash_platform_data nslu2_flash_data = {
 58	.map_name		= "cfi_probe",
 59	.width			= 2,
 60};
 61
 62static struct resource nslu2_flash_resource = {
 63	.flags			= IORESOURCE_MEM,
 64};
 65
 66static 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
 74static struct gpiod_lookup_table nslu2_i2c_gpiod_table = {
 75	.dev_id		= "i2c-gpio.0",
 76	.table		= {
 77		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SDA_PIN,
 78				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 79		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SCL_PIN,
 80				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 81	},
 82};
 83
 84static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
 85	{
 86		I2C_BOARD_INFO("x1205", 0x6f),
 87	},
 88};
 89
 90static struct gpio_led nslu2_led_pins[] = {
 91	{
 92		.name		= "nslu2:green:ready",
 93		.gpio		= NSLU2_LED_GRN_GPIO,
 94	},
 95	{
 96		.name		= "nslu2:red:status",
 97		.gpio		= NSLU2_LED_RED_GPIO,
 98	},
 99	{
100		.name		= "nslu2:green:disk-1",
101		.gpio		= NSLU2_LED_DISK1_GPIO,
102		.active_low	= true,
103	},
104	{
105		.name		= "nslu2:green:disk-2",
106		.gpio		= NSLU2_LED_DISK2_GPIO,
107		.active_low	= true,
108	},
109};
110
111static struct gpio_led_platform_data nslu2_led_data = {
112	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
113	.leds			= nslu2_led_pins,
114};
115
116static struct platform_device nslu2_leds = {
117	.name			= "leds-gpio",
118	.id			= -1,
119	.dev.platform_data	= &nslu2_led_data,
120};
121
122static struct platform_device nslu2_i2c_gpio = {
123	.name			= "i2c-gpio",
124	.id			= 0,
125	.dev	 = {
126		.platform_data	= NULL,
127	},
128};
129
130static struct resource nslu2_beeper_resources[] = {
131	{
132		.start	= IRQ_IXP4XX_TIMER2,
133		.flags	= IORESOURCE_IRQ,
134	},
135};
136
137static struct platform_device nslu2_beeper = {
138	.name			= "ixp4xx-beeper",
139	.id			= NSLU2_GPIO_BUZZ,
140	.resource		= nslu2_beeper_resources,
141	.num_resources		= ARRAY_SIZE(nslu2_beeper_resources),
142};
143
144static 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
157static 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
179static 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
187/* Built-in 10/100 Ethernet MAC interfaces */
188static struct resource nslu2_eth_resources[] = {
189	{
190		.start		= IXP4XX_EthB_BASE_PHYS,
191		.end		= IXP4XX_EthB_BASE_PHYS + 0x0fff,
192		.flags		= IORESOURCE_MEM,
193	},
194};
195
196static struct eth_plat_info nslu2_plat_eth[] = {
197	{
198		.phy		= 1,
199		.rxq		= 3,
200		.txreadyq	= 20,
201	}
202};
203
204static struct platform_device nslu2_eth[] = {
205	{
206		.name			= "ixp4xx_eth",
207		.id			= IXP4XX_ETH_NPEB,
208		.dev.platform_data	= nslu2_plat_eth,
209		.num_resources		= ARRAY_SIZE(nslu2_eth_resources),
210		.resource		= nslu2_eth_resources,
211	}
212};
213
214static struct platform_device *nslu2_devices[] __initdata = {
215	&nslu2_i2c_gpio,
216	&nslu2_flash,
217	&nslu2_beeper,
218	&nslu2_leds,
219	&nslu2_eth[0],
220};
221
222static void nslu2_power_off(void)
223{
224	/* This causes the box to drop the power and go dead. */
225
226	/* enable the pwr cntl gpio and assert power off */
227	gpio_direction_output(NSLU2_PO_GPIO, 1);
 
 
 
228}
229
230static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
231{
232	/* Signal init to do the ctrlaltdel action, this will bypass init if
233	 * it hasn't started and do a kernel_restart.
234	 */
235	ctrl_alt_del();
236
237	return IRQ_HANDLED;
238}
239
240static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
241{
242	/* This is the paper-clip reset, it shuts the machine down directly.
243	 */
244	machine_power_off();
245
246	return IRQ_HANDLED;
247}
248
249static int __init nslu2_gpio_init(void)
250{
251	if (!machine_is_nslu2())
252		return 0;
253
254	/* Request the power off GPIO */
255	return gpio_request(NSLU2_PO_GPIO, "power off");
256}
257device_initcall(nslu2_gpio_init);
258
259static void __init nslu2_timer_init(void)
260{
261    /* The xtal on this machine is non-standard. */
262    ixp4xx_timer_freq = NSLU2_FREQ;
263
264    /* Call standard timer_init function. */
265    ixp4xx_timer_init();
266}
267
 
 
 
 
268static void __init nslu2_init(void)
269{
270	uint8_t __iomem *f;
271	int i;
272
273	ixp4xx_sys_init();
274
275	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
276	nslu2_flash_resource.end =
277		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
278
279	gpiod_add_lookup_table(&nslu2_i2c_gpiod_table);
280	i2c_register_board_info(0, nslu2_i2c_board_info,
281				ARRAY_SIZE(nslu2_i2c_board_info));
282
283	/*
284	 * This is only useful on a modified machine, but it is valuable
285	 * to have it first in order to see debug messages, and so that
286	 * it does *not* get removed if platform_add_devices fails!
287	 */
288	(void)platform_device_register(&nslu2_uart);
289
290	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
291
292	pm_power_off = nslu2_power_off;
293
294	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
295		IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {
 
296
297		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
298			gpio_to_irq(NSLU2_RB_GPIO));
299	}
300
301	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
302		IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) {
 
303
304		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
305			gpio_to_irq(NSLU2_PB_GPIO));
306	}
307
308	/*
309	 * Map in a portion of the flash and read the MAC address.
310	 * Since it is stored in BE in the flash itself, we need to
311	 * byteswap it if we're in LE mode.
312	 */
313	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
314	if (f) {
315		for (i = 0; i < 6; i++)
316#ifdef __ARMEB__
317			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
318#else
319			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
320#endif
321		iounmap(f);
322	}
323	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
324	       nslu2_plat_eth[0].hwaddr);
325
326}
327
328MACHINE_START(NSLU2, "Linksys NSLU2")
329	/* Maintainer: www.nslu2-linux.org */
330	.atag_offset	= 0x100,
331	.map_io		= ixp4xx_map_io,
332	.init_early	= ixp4xx_init_early,
333	.init_irq	= ixp4xx_init_irq,
334	.init_time	= nslu2_timer_init,
335	.init_machine	= nslu2_init,
336#if defined(CONFIG_PCI)
337	.dma_zone_size	= SZ_64M,
338#endif
339	.restart	= ixp4xx_restart,
340MACHINE_END