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 and assert power off */
201	gpio_direction_output(NSLU2_PO_GPIO, 1);
202}
203
204static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
205{
206	/* Signal init to do the ctrlaltdel action, this will bypass init if
207	 * it hasn't started and do a kernel_restart.
208	 */
209	ctrl_alt_del();
210
211	return IRQ_HANDLED;
212}
213
214static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
215{
216	/* This is the paper-clip reset, it shuts the machine down directly.
217	 */
218	machine_power_off();
219
220	return IRQ_HANDLED;
221}
222
223static int __init nslu2_gpio_init(void)
224{
225	if (!machine_is_nslu2())
226		return 0;
227
228	/* Request the power off GPIO */
229	return gpio_request(NSLU2_PO_GPIO, "power off");
230}
231device_initcall(nslu2_gpio_init);
232
233static void __init nslu2_timer_init(void)
234{
235    /* The xtal on this machine is non-standard. */
236    ixp4xx_timer_freq = NSLU2_FREQ;
237
238    /* Call standard timer_init function. */
239    ixp4xx_timer_init();
240}
241
242static void __init nslu2_init(void)
243{
244	uint8_t __iomem *f;
245	int i;
246
247	ixp4xx_sys_init();
248
249	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
250	nslu2_flash_resource.end =
251		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
252
 
253	i2c_register_board_info(0, nslu2_i2c_board_info,
254				ARRAY_SIZE(nslu2_i2c_board_info));
255
256	/*
257	 * This is only useful on a modified machine, but it is valuable
258	 * to have it first in order to see debug messages, and so that
259	 * it does *not* get removed if platform_add_devices fails!
260	 */
261	(void)platform_device_register(&nslu2_uart);
262
263	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
264
265	pm_power_off = nslu2_power_off;
266
267	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
268		IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {
269
270		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
271			gpio_to_irq(NSLU2_RB_GPIO));
272	}
273
274	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
275		IRQF_TRIGGER_HIGH, "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	}
280
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	}
296	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
297	       nslu2_plat_eth[0].hwaddr);
298
299}
300
301MACHINE_START(NSLU2, "Linksys NSLU2")
302	/* Maintainer: www.nslu2-linux.org */
303	.atag_offset	= 0x100,
304	.map_io		= ixp4xx_map_io,
305	.init_early	= ixp4xx_init_early,
306	.init_irq	= ixp4xx_init_irq,
307	.init_time	= nslu2_timer_init,
308	.init_machine	= nslu2_init,
309#if defined(CONFIG_PCI)
310	.dma_zone_size	= SZ_64M,
311#endif
312	.restart	= ixp4xx_restart,
313MACHINE_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#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
 55static struct flash_platform_data nslu2_flash_data = {
 56	.map_name		= "cfi_probe",
 57	.width			= 2,
 58};
 59
 60static struct resource nslu2_flash_resource = {
 61	.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
 72static struct gpiod_lookup_table nslu2_i2c_gpiod_table = {
 73	.dev_id		= "i2c-gpio.0",
 74	.table		= {
 75		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SDA_PIN,
 76				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 77		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SCL_PIN,
 78				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 79	},
 80};
 81
 82static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
 83	{
 84		I2C_BOARD_INFO("x1205", 0x6f),
 85	},
 86};
 87
 88static struct gpio_led nslu2_led_pins[] = {
 89	{
 90		.name		= "nslu2:green:ready",
 91		.gpio		= NSLU2_LED_GRN_GPIO,
 92	},
 93	{
 94		.name		= "nslu2:red:status",
 95		.gpio		= NSLU2_LED_RED_GPIO,
 96	},
 97	{
 98		.name		= "nslu2:green:disk-1",
 99		.gpio		= NSLU2_LED_DISK1_GPIO,
100		.active_low	= true,
101	},
102	{
103		.name		= "nslu2:green:disk-2",
104		.gpio		= NSLU2_LED_DISK2_GPIO,
105		.active_low	= true,
106	},
107};
108
109static struct gpio_led_platform_data nslu2_led_data = {
110	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
111	.leds			= nslu2_led_pins,
112};
113
114static struct platform_device nslu2_leds = {
115	.name			= "leds-gpio",
116	.id			= -1,
117	.dev.platform_data	= &nslu2_led_data,
118};
119
120static struct platform_device nslu2_i2c_gpio = {
121	.name			= "i2c-gpio",
122	.id			= 0,
123	.dev	 = {
124		.platform_data	= NULL,
125	},
126};
127
128static struct platform_device nslu2_beeper = {
129	.name			= "ixp4xx-beeper",
130	.id			= NSLU2_GPIO_BUZZ,
131	.num_resources		= 0,
132};
133
134static 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
147static 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
169static 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
177/* Built-in 10/100 Ethernet MAC interfaces */
178static struct eth_plat_info nslu2_plat_eth[] = {
179	{
180		.phy		= 1,
181		.rxq		= 3,
182		.txreadyq	= 20,
183	}
184};
185
186static 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
194static struct platform_device *nslu2_devices[] __initdata = {
195	&nslu2_i2c_gpio,
196	&nslu2_flash,
197	&nslu2_beeper,
198	&nslu2_leds,
199	&nslu2_eth[0],
200};
201
202static void nslu2_power_off(void)
203{
204	/* This causes the box to drop the power and go dead. */
205
206	/* enable the pwr cntl gpio and assert power off */
207	gpio_direction_output(NSLU2_PO_GPIO, 1);
208}
209
210static 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
220static 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
229static 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}
237device_initcall(nslu2_gpio_init);
238
239static void __init nslu2_timer_init(void)
240{
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}
247
248static void __init nslu2_init(void)
249{
250	uint8_t __iomem *f;
251	int i;
252
253	ixp4xx_sys_init();
254
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
259	gpiod_add_lookup_table(&nslu2_i2c_gpiod_table);
260	i2c_register_board_info(0, nslu2_i2c_board_info,
261				ARRAY_SIZE(nslu2_i2c_board_info));
262
263	/*
264	 * This is only useful on a modified machine, but it is valuable
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
270	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
271
272	pm_power_off = nslu2_power_off;
273
274	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
275		IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {
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,
282		IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) {
283
284		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
285			gpio_to_irq(NSLU2_PB_GPIO));
286	}
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	}
303	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
304	       nslu2_plat_eth[0].hwaddr);
305
306}
307
308MACHINE_START(NSLU2, "Linksys NSLU2")
309	/* Maintainer: www.nslu2-linux.org */
310	.atag_offset	= 0x100,
311	.map_io		= ixp4xx_map_io,
312	.init_early	= ixp4xx_init_early,
313	.init_irq	= ixp4xx_init_irq,
314	.init_time	= nslu2_timer_init,
315	.init_machine	= nslu2_init,
316#if defined(CONFIG_PCI)
317	.dma_zone_size	= SZ_64M,
318#endif
319	.restart	= ixp4xx_restart,
320MACHINE_END