1/*
2 * arch/arm/mach-ixp4xx/fsg-setup.c
3 *
4 * FSG 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: Rod Whitby <rod@whitby.id.au>
14 * Maintainers: http://www.nslu2-linux.org/
15 *
16 */
17#include <linux/gpio.h>
18#include <linux/if_ether.h>
19#include <linux/irq.h>
20#include <linux/serial.h>
21#include <linux/serial_8250.h>
22#include <linux/leds.h>
23#include <linux/reboot.h>
24#include <linux/i2c.h>
25#include <linux/i2c-gpio.h>
26#include <linux/io.h>
27#include <asm/mach-types.h>
28#include <asm/mach/arch.h>
29#include <asm/mach/flash.h>
30
31#define FSG_SDA_PIN		12
32#define FSG_SCL_PIN		13
33
34#define FSG_SB_GPIO		4	/* sync button */
35#define FSG_RB_GPIO		9	/* reset button */
36#define FSG_UB_GPIO		10	/* usb button */
37
38static struct flash_platform_data fsg_flash_data = {
39	.map_name		= "cfi_probe",
40	.width			= 2,
41};
42
43static struct resource fsg_flash_resource = {
44	.flags			= IORESOURCE_MEM,
45};
46
47static struct platform_device fsg_flash = {
48	.name			= "IXP4XX-Flash",
49	.id			= 0,
50	.dev = {
51		.platform_data	= &fsg_flash_data,
52	},
53	.num_resources		= 1,
54	.resource		= &fsg_flash_resource,
55};
56
57static struct i2c_gpio_platform_data fsg_i2c_gpio_data = {
58	.sda_pin		= FSG_SDA_PIN,
59	.scl_pin		= FSG_SCL_PIN,
60};
61
62static struct platform_device fsg_i2c_gpio = {
63	.name			= "i2c-gpio",
64	.id			= 0,
65	.dev = {
66		.platform_data	= &fsg_i2c_gpio_data,
67	},
68};
69
70static struct i2c_board_info __initdata fsg_i2c_board_info [] = {
71	{
72		I2C_BOARD_INFO("isl1208", 0x6f),
73	},
74};
75
76static struct resource fsg_uart_resources[] = {
77	{
78		.start		= IXP4XX_UART1_BASE_PHYS,
79		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
80		.flags		= IORESOURCE_MEM,
81	},
82	{
83		.start		= IXP4XX_UART2_BASE_PHYS,
84		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
85		.flags		= IORESOURCE_MEM,
86	}
87};
88
89static struct plat_serial8250_port fsg_uart_data[] = {
90	{
91		.mapbase	= IXP4XX_UART1_BASE_PHYS,
92		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
93		.irq		= IRQ_IXP4XX_UART1,
94		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
95		.iotype		= UPIO_MEM,
96		.regshift	= 2,
97		.uartclk	= IXP4XX_UART_XTAL,
98	},
99	{
100		.mapbase	= IXP4XX_UART2_BASE_PHYS,
101		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
102		.irq		= IRQ_IXP4XX_UART2,
103		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
104		.iotype		= UPIO_MEM,
105		.regshift	= 2,
106		.uartclk	= IXP4XX_UART_XTAL,
107	},
108	{ }
109};
110
111static struct platform_device fsg_uart = {
112	.name			= "serial8250",
113	.id			= PLAT8250_DEV_PLATFORM,
114	.dev = {
115		.platform_data	= fsg_uart_data,
116	},
117	.num_resources		= ARRAY_SIZE(fsg_uart_resources),
118	.resource		= fsg_uart_resources,
119};
120
121static struct platform_device fsg_leds = {
122	.name		= "fsg-led",
123	.id		= -1,
124};
125
126/* Built-in 10/100 Ethernet MAC interfaces */
127static struct eth_plat_info fsg_plat_eth[] = {
128	{
129		.phy		= 5,
130		.rxq		= 3,
131		.txreadyq	= 20,
132	}, {
133		.phy		= 4,
134		.rxq		= 4,
135		.txreadyq	= 21,
136	}
137};
138
139static struct platform_device fsg_eth[] = {
140	{
141		.name			= "ixp4xx_eth",
142		.id			= IXP4XX_ETH_NPEB,
143		.dev = {
144			.platform_data	= fsg_plat_eth,
145		},
146	}, {
147		.name			= "ixp4xx_eth",
148		.id			= IXP4XX_ETH_NPEC,
149		.dev = {
150			.platform_data	= fsg_plat_eth + 1,
151		},
152	}
153};
154
155static struct platform_device *fsg_devices[] __initdata = {
156	&fsg_i2c_gpio,
157	&fsg_flash,
158	&fsg_leds,
159	&fsg_eth[0],
160	&fsg_eth[1],
161};
162
163static irqreturn_t fsg_power_handler(int irq, void *dev_id)
164{
165	/* Signal init to do the ctrlaltdel action, this will bypass init if
166	 * it hasn't started and do a kernel_restart.
167	 */
168	ctrl_alt_del();
169
170	return IRQ_HANDLED;
171}
172
173static irqreturn_t fsg_reset_handler(int irq, void *dev_id)
174{
175	/* This is the paper-clip reset which does an emergency reboot. */
176	printk(KERN_INFO "Restarting system.\n");
177	machine_restart(NULL);
178
179	/* This should never be reached. */
180	return IRQ_HANDLED;
181}
182
183static void __init fsg_init(void)
184{
185	uint8_t __iomem *f;
186
187	ixp4xx_sys_init();
188
189	fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
190	fsg_flash_resource.end =
191		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
192
193	*IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE;
194	*IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0;
195
196	/* Configure CS2 for operation, 8bit and writable */
197	*IXP4XX_EXP_CS2 = 0xbfff0002;
198
199	i2c_register_board_info(0, fsg_i2c_board_info,
200				ARRAY_SIZE(fsg_i2c_board_info));
201
202	/* This is only useful on a modified machine, but it is valuable
203	 * to have it first in order to see debug messages, and so that
204	 * it does *not* get removed if platform_add_devices fails!
205	 */
206	(void)platform_device_register(&fsg_uart);
207
208	platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices));
209
210	if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler,
211			IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) {
212
213		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
214			gpio_to_irq(FSG_RB_GPIO));
215	}
216
217	if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler,
218			IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) {
219
220		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
221			gpio_to_irq(FSG_SB_GPIO));
222	}
223
224	/*
225	 * Map in a portion of the flash and read the MAC addresses.
226	 * Since it is stored in BE in the flash itself, we need to
227	 * byteswap it if we're in LE mode.
228	 */
229	f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000);
230	if (f) {
231#ifdef __ARMEB__
232		int i;
233		for (i = 0; i < 6; i++) {
234			fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i);
235			fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i);
236		}
237#else
238
239		/*
240		  Endian-swapped reads from unaligned addresses are
241		  required to extract the two MACs from the big-endian
242		  Redboot config area in flash.
243		*/
244
245		fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421);
246		fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420);
247		fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427);
248		fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426);
249		fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425);
250		fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424);
251
252		fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439);
253		fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F);
254		fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E);
255		fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D);
256		fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C);
257		fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443);
258#endif
259		iounmap(f);
260	}
261	printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n",
262	       fsg_plat_eth[0].hwaddr);
263	printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n",
264	       fsg_plat_eth[1].hwaddr);
265
266}
267
268MACHINE_START(FSG, "Freecom FSG-3")
269	/* Maintainer: www.nslu2-linux.org */
270	.map_io		= ixp4xx_map_io,
271	.init_early	= ixp4xx_init_early,
272	.init_irq	= ixp4xx_init_irq,
273	.init_time	= ixp4xx_timer_init,
274	.atag_offset	= 0x100,
275	.init_machine	= fsg_init,
276#if defined(CONFIG_PCI)
277	.dma_zone_size	= SZ_64M,
278#endif
279	.restart	= ixp4xx_restart,
280MACHINE_END
281
282