[linux-block.git] / arch / arm / mach-ixp4xx / nslu2-setup.c

// SPDX-License-Identifier: GPL-2.0
/*
 * arch/arm/mach-ixp4xx/nslu2-setup.c
 *
 * NSLU2 board-setup
 *
 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
 *
 * based on ixdp425-setup.c:
 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
 * based on nslu2-power.c:
 *	Copyright (C) 2005 Tower Technologies
 *
 * Author: Mark Rakes <mrakes at mac.com>
 * Author: Rod Whitby <rod@whitby.id.au>
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 * Maintainers: http://www.nslu2-linux.org/
 *
 */
#include <linux/gpio.h>
#include <linux/if_ether.h>
#include <linux/irq.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/leds.h>
#include <linux/reboot.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/io.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/time.h>

#define NSLU2_SDA_PIN		7
#define NSLU2_SCL_PIN		6

/* NSLU2 Timer */
#define NSLU2_FREQ 66000000

/* Buttons */
#define NSLU2_PB_GPIO		5	/* power button */
#define NSLU2_PO_GPIO		8	/* power off */
#define NSLU2_RB_GPIO		12	/* reset button */

/* Buzzer */
#define NSLU2_GPIO_BUZZ		4

/* LEDs */
#define NSLU2_LED_RED_GPIO	0
#define NSLU2_LED_GRN_GPIO	1
#define NSLU2_LED_DISK1_GPIO	3
#define NSLU2_LED_DISK2_GPIO	2

static struct flash_platform_data nslu2_flash_data = {
	.map_name		= "cfi_probe",
	.width			= 2,
};

static struct resource nslu2_flash_resource = {
	.flags			= IORESOURCE_MEM,
};

static struct platform_device nslu2_flash = {
	.name			= "IXP4XX-Flash",
	.id			= 0,
	.dev.platform_data	= &nslu2_flash_data,
	.num_resources		= 1,
	.resource		= &nslu2_flash_resource,
};

static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
	.sda_pin		= NSLU2_SDA_PIN,
	.scl_pin		= NSLU2_SCL_PIN,
};

static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
	{
		I2C_BOARD_INFO("x1205", 0x6f),
	},
};

static struct gpio_led nslu2_led_pins[] = {
	{
		.name		= "nslu2:green:ready",
		.gpio		= NSLU2_LED_GRN_GPIO,
	},
	{
		.name		= "nslu2:red:status",
		.gpio		= NSLU2_LED_RED_GPIO,
	},
	{
		.name		= "nslu2:green:disk-1",
		.gpio		= NSLU2_LED_DISK1_GPIO,
		.active_low	= true,
	},
	{
		.name		= "nslu2:green:disk-2",
		.gpio		= NSLU2_LED_DISK2_GPIO,
		.active_low	= true,
	},
};

static struct gpio_led_platform_data nslu2_led_data = {
	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
	.leds			= nslu2_led_pins,
};

static struct platform_device nslu2_leds = {
	.name			= "leds-gpio",
	.id			= -1,
	.dev.platform_data	= &nslu2_led_data,
};

static struct platform_device nslu2_i2c_gpio = {
	.name			= "i2c-gpio",
	.id			= 0,
	.dev	 = {
		.platform_data	= &nslu2_i2c_gpio_data,
	},
};

static struct platform_device nslu2_beeper = {
	.name			= "ixp4xx-beeper",
	.id			= NSLU2_GPIO_BUZZ,
	.num_resources		= 0,
};

static struct resource nslu2_uart_resources[] = {
	{
		.start		= IXP4XX_UART1_BASE_PHYS,
		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= IXP4XX_UART2_BASE_PHYS,
		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
		.flags		= IORESOURCE_MEM,
	}
};

static struct plat_serial8250_port nslu2_uart_data[] = {
	{
		.mapbase	= IXP4XX_UART1_BASE_PHYS,
		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
		.irq		= IRQ_IXP4XX_UART1,
		.flags		= UPF_BOOT_AUTOCONF,
		.iotype		= UPIO_MEM,
		.regshift	= 2,
		.uartclk	= IXP4XX_UART_XTAL,
	},
	{
		.mapbase	= IXP4XX_UART2_BASE_PHYS,
		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
		.irq		= IRQ_IXP4XX_UART2,
		.flags		= UPF_BOOT_AUTOCONF,
		.iotype		= UPIO_MEM,
		.regshift	= 2,
		.uartclk	= IXP4XX_UART_XTAL,
	},
	{ }
};

static struct platform_device nslu2_uart = {
	.name			= "serial8250",
	.id			= PLAT8250_DEV_PLATFORM,
	.dev.platform_data	= nslu2_uart_data,
	.num_resources		= 2,
	.resource		= nslu2_uart_resources,
};

/* Built-in 10/100 Ethernet MAC interfaces */
static struct eth_plat_info nslu2_plat_eth[] = {
	{
		.phy		= 1,
		.rxq		= 3,
		.txreadyq	= 20,
	}
};

static struct platform_device nslu2_eth[] = {
	{
		.name			= "ixp4xx_eth",
		.id			= IXP4XX_ETH_NPEB,
		.dev.platform_data	= nslu2_plat_eth,
	}
};

static struct platform_device *nslu2_devices[] __initdata = {
	&nslu2_i2c_gpio,
	&nslu2_flash,
	&nslu2_beeper,
	&nslu2_leds,
	&nslu2_eth[0],
};

static void nslu2_power_off(void)
{
	/* This causes the box to drop the power and go dead. */

	/* enable the pwr cntl gpio and assert power off */
	gpio_direction_output(NSLU2_PO_GPIO, 1);
}

static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
{
	/* Signal init to do the ctrlaltdel action, this will bypass init if
	 * it hasn't started and do a kernel_restart.
	 */
	ctrl_alt_del();

	return IRQ_HANDLED;
}

static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
{
	/* This is the paper-clip reset, it shuts the machine down directly.
	 */
	machine_power_off();

	return IRQ_HANDLED;
}

static int __init nslu2_gpio_init(void)
{
	if (!machine_is_nslu2())
		return 0;

	/* Request the power off GPIO */
	return gpio_request(NSLU2_PO_GPIO, "power off");
}
device_initcall(nslu2_gpio_init);

static void __init nslu2_timer_init(void)
{
    /* The xtal on this machine is non-standard. */
    ixp4xx_timer_freq = NSLU2_FREQ;

    /* Call standard timer_init function. */
    ixp4xx_timer_init();
}

static void __init nslu2_init(void)
{
	uint8_t __iomem *f;
	int i;

	ixp4xx_sys_init();

	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	nslu2_flash_resource.end =
		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

	i2c_register_board_info(0, nslu2_i2c_board_info,
				ARRAY_SIZE(nslu2_i2c_board_info));

	/*
	 * This is only useful on a modified machine, but it is valuable
	 * to have it first in order to see debug messages, and so that
	 * it does *not* get removed if platform_add_devices fails!
	 */
	(void)platform_device_register(&nslu2_uart);

	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));

	pm_power_off = nslu2_power_off;

	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
		IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {

		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
			gpio_to_irq(NSLU2_RB_GPIO));
	}

	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
		IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) {

		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
			gpio_to_irq(NSLU2_PB_GPIO));
	}

	/*
	 * Map in a portion of the flash and read the MAC address.
	 * Since it is stored in BE in the flash itself, we need to
	 * byteswap it if we're in LE mode.
	 */
	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
	if (f) {
		for (i = 0; i < 6; i++)
#ifdef __ARMEB__
			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
#else
			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
#endif
		iounmap(f);
	}
	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
	       nslu2_plat_eth[0].hwaddr);

}

MACHINE_START(NSLU2, "Linksys NSLU2")
	/* Maintainer: www.nslu2-linux.org */
	.atag_offset	= 0x100,
	.map_io		= ixp4xx_map_io,
	.init_early	= ixp4xx_init_early,
	.init_irq	= ixp4xx_init_irq,
	.init_time	= nslu2_timer_init,
	.init_machine	= nslu2_init,
#if defined(CONFIG_PCI)
	.dma_zone_size	= SZ_64M,
#endif
	.restart	= ixp4xx_restart,
MACHINE_END
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:
0929ac3e RW	12	* Copyright (C) 2005 Tower Technologies
a7918f39 AZ	13	*
a7918f39 AZ	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/
a7918f39 AZ	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>
a7918f39 AZ	24	#include <linux/serial_8250.h>
e22b04fb	25	#include <linux/leds.h>
0929ac3e	26	#include <linux/reboot.h>
e28067d5	27	#include <linux/i2c.h>
5a4a2387	28	#include <linux/i2c-gpio.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
5a4a2387	72	static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
a7918f39 AZ	73	.sda_pin = NSLU2_SDA_PIN,
	74	.scl_pin = NSLU2_SCL_PIN,
	75	};
	76
e28067d5 RW	77	static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
e28067d5 RW	78	{
3760f736	79	I2C_BOARD_INFO("x1205", 0x6f),
e28067d5 RW	80	},
	81	};
	82
1208ebf2	83	static struct gpio_led nslu2_led_pins[] = {
e22b04fb	84	{
6c152bee	85	.name = "nslu2:green:ready",
1208ebf2	86	.gpio = NSLU2_LED_GRN_GPIO,
e22b04fb RW	87	},
e22b04fb RW	88	{
6c152bee	89	.name = "nslu2:red:status",
1208ebf2	90	.gpio = NSLU2_LED_RED_GPIO,
e22b04fb RW	91	},
e22b04fb RW	92	{
6c152bee	93	.name = "nslu2:green:disk-1",
1208ebf2 RW	94	.gpio = NSLU2_LED_DISK1_GPIO,
1208ebf2 RW	95	.active_low = true,
e22b04fb RW	96	},
e22b04fb RW	97	{
6c152bee	98	.name = "nslu2:green:disk-2",
1208ebf2 RW	99	.gpio = NSLU2_LED_DISK2_GPIO,
1208ebf2 RW	100	.active_low = true,
e22b04fb RW	101	},
	102	};
	103
1208ebf2 RW	104	static struct gpio_led_platform_data nslu2_led_data = {
	105	.num_leds = ARRAY_SIZE(nslu2_led_pins),
	106	.leds = nslu2_led_pins,
	107	};
	108
e22b04fb	109	static struct platform_device nslu2_leds = {
1208ebf2	110	.name = "leds-gpio",
e22b04fb	111	.id = -1,
1208ebf2	112	.dev.platform_data = &nslu2_led_data,
e22b04fb	113	};
e22b04fb	114
5a4a2387 MLJ	115	static struct platform_device nslu2_i2c_gpio = {
5a4a2387 MLJ	116	.name = "i2c-gpio",
a7918f39	117	.id = 0,
5a4a2387 MLJ	118	.dev = {
	119	.platform_data = &nslu2_i2c_gpio_data,
	120	},
a7918f39 AZ	121	};
a7918f39 AZ	122
bc66d449 AZ	123	static struct platform_device nslu2_beeper = {
	124	.name = "ixp4xx-beeper",
	125	.id = NSLU2_GPIO_BUZZ,
	126	.num_resources = 0,
	127	};
	128
a7918f39 AZ	129	static 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
	142	static 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
	164	static 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
b7edc84a RW	172	/* Built-in 10/100 Ethernet MAC interfaces */
	173	static struct eth_plat_info nslu2_plat_eth[] = {
	174	{
	175	.phy = 1,
	176	.rxq = 3,
	177	.txreadyq = 20,
	178	}
	179	};
	180
	181	static 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
a7918f39	189	static struct platform_device *nslu2_devices[] __initdata = {
5a4a2387	190	&nslu2_i2c_gpio,
a7918f39	191	&nslu2_flash,
bc66d449	192	&nslu2_beeper,
e22b04fb	193	&nslu2_leds,
b7edc84a	194	&nslu2_eth[0],
a7918f39 AZ	195	};
	196
	197	static void nslu2_power_off(void)
	198	{
	199	/* This causes the box to drop the power and go dead. */
	200
8040dd09 LW	201	/* enable the pwr cntl gpio and assert power off */
8040dd09 LW	202	gpio_direction_output(NSLU2_PO_GPIO, 1);
a7918f39 AZ	203	}
a7918f39 AZ	204
0929ac3e RW	205	static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
	206	{
	207	/* Signal init to do the ctrlaltdel action, this will bypass init if
	208	* it hasn't started and do a kernel_restart.
	209	*/
	210	ctrl_alt_del();
	211
	212	return IRQ_HANDLED;
	213	}
	214
	215	static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
	216	{
	217	/* This is the paper-clip reset, it shuts the machine down directly.
	218	*/
	219	machine_power_off();
	220
	221	return IRQ_HANDLED;
	222	}
	223
8040dd09 LW	224	static int __init nslu2_gpio_init(void)
	225	{
	226	if (!machine_is_nslu2())
	227	return 0;
	228
	229	/* Request the power off GPIO */
	230	return gpio_request(NSLU2_PO_GPIO, "power off");
	231	}
	232	device_initcall(nslu2_gpio_init);
	233
435c5da0	234	static void __init nslu2_timer_init(void)
a7918f39	235	{
435c5da0 MLJ	236	/* The xtal on this machine is non-standard. */
	237	ixp4xx_timer_freq = NSLU2_FREQ;
	238
	239	/* Call standard timer_init function. */
	240	ixp4xx_timer_init();
	241	}
84904d0e	242
435c5da0 MLJ	243	static void __init nslu2_init(void)
435c5da0 MLJ	244	{
b7edc84a RW	245	uint8_t __iomem *f;
	246	int i;
	247
a7918f39 AZ	248	ixp4xx_sys_init();
a7918f39 AZ	249
3dfaf7a6 MM	250	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	251	nslu2_flash_resource.end =
	252	IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
	253
e28067d5 RW	254	i2c_register_board_info(0, nslu2_i2c_board_info,
	255	ARRAY_SIZE(nslu2_i2c_board_info));
	256
cc50a0df MLJ	257	/*
cc50a0df MLJ	258	* This is only useful on a modified machine, but it is valuable
e22b04fb RW	259	* to have it first in order to see debug messages, and so that
	260	* it does not get removed if platform_add_devices fails!
	261	*/
	262	(void)platform_device_register(&nslu2_uart);
	263
a7918f39	264	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
b7edc84a	265
0929ac3e RW	266	pm_power_off = nslu2_power_off;
	267
	268	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
1ee6564d	269	IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {
0929ac3e RW	270
	271	printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
	272	gpio_to_irq(NSLU2_RB_GPIO));
	273	}
	274
	275	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
1ee6564d	276	IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) {
0929ac3e RW	277
	278	printk(KERN_DEBUG "Power Button IRQ %d not available\n",
	279	gpio_to_irq(NSLU2_PB_GPIO));
	280	}
b7edc84a RW	281
	282	/*
	283	* Map in a portion of the flash and read the MAC address.
	284	* Since it is stored in BE in the flash itself, we need to
	285	* byteswap it if we're in LE mode.
	286	*/
	287	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
	288	if (f) {
	289	for (i = 0; i < 6; i++)
	290	#ifdef __ARMEB__
	291	nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
	292	#else
	293	nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
	294	#endif
	295	iounmap(f);
	296	}
e174961c JB	297	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
e174961c JB	298	nslu2_plat_eth[0].hwaddr);
b7edc84a	299
a7918f39 AZ	300	}
	301
	302	MACHINE_START(NSLU2, "Linksys NSLU2")
	303	/* Maintainer: www.nslu2-linux.org */
e022c729	304	.atag_offset = 0x100,
a7918f39	305	.map_io = ixp4xx_map_io,
f449588c	306	.init_early = ixp4xx_init_early,
a7918f39	307	.init_irq = ixp4xx_init_irq,
6bb27d73	308	.init_time = nslu2_timer_init,
a7918f39	309	.init_machine = nslu2_init,
7553ee77 NP	310	#if defined(CONFIG_PCI)
	311	.dma_zone_size = SZ_64M,
	312	#endif
d1b860fb	313	.restart = ixp4xx_restart,
a7918f39	314	MACHINE_END