1/*
2 * arch/arm/mach-ixp4xx/gtwx5715-setup.c
3 *
4 * Gemtek GTWX5715 (Linksys WRV54G) board setup
5 *
6 * Copyright (C) 2004 George T. Joseph
7 * Derived from Coyote
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
22 *
23 */
24
25#include <linux/init.h>
26#include <linux/device.h>
27#include <linux/serial.h>
28#include <linux/tty.h>
29#include <linux/serial_8250.h>
30#include <linux/slab.h>
31
32#include <asm/types.h>
33#include <asm/setup.h>
34#include <asm/memory.h>
35#include <asm/hardware.h>
36#include <asm/irq.h>
37#include <asm/mach-types.h>
38#include <asm/mach/arch.h>
39#include <asm/mach/flash.h>
40#include <asm/arch/gtwx5715.h>
41
42/*
43 * Xscale UART registers are 32 bits wide with only the least
44 * significant 8 bits having any meaning.  From a configuration
45 * perspective, this means 2 things...
46 *
47 *   Setting .regshift = 2 so that the standard 16550 registers
48 *   line up on every 4th byte.
49 *
50 *   Shifting the register start virtual address +3 bytes when
51 *   compiled big-endian.  Since register writes are done on a
52 *   single byte basis, if the shift isn't done the driver will
53 *   write the value into the most significant byte of the register,
54 *   which is ignored, instead of the least significant.
55 */
56
57#ifdef	__ARMEB__
58#define	REG_OFFSET	3
59#else
60#define	REG_OFFSET	0
61#endif
62
63/*
64 * Only the second or "console" uart is connected on the gtwx5715.
65 */
66
67static struct resource gtwx5715_uart_resources[] = {
68	{
69		.start	= IXP4XX_UART2_BASE_PHYS,
70		.end	= IXP4XX_UART2_BASE_PHYS + 0x0fff,
71		.flags	= IORESOURCE_MEM,
72	},
73	{
74		.start	= IRQ_IXP4XX_UART2,
75		.end	= IRQ_IXP4XX_UART2,
76		.flags	= IORESOURCE_IRQ,
77	},
78	{ },
79};
80
81
82static struct plat_serial8250_port gtwx5715_uart_platform_data[] = {
83	{
84	.mapbase	= IXP4XX_UART2_BASE_PHYS,
85	.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
86	.irq		= IRQ_IXP4XX_UART2,
87	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
88	.iotype		= UPIO_MEM,
89	.regshift	= 2,
90	.uartclk	= IXP4XX_UART_XTAL,
91	},
92	{ },
93};
94
95static struct platform_device gtwx5715_uart_device = {
96	.name		= "serial8250",
97	.id		= PLAT8250_DEV_PLATFORM,
98	.dev			= {
99		.platform_data	= gtwx5715_uart_platform_data,
100	},
101	.num_resources	= 2,
102	.resource	= gtwx5715_uart_resources,
103};
104
105static struct flash_platform_data gtwx5715_flash_data = {
106	.map_name	= "cfi_probe",
107	.width		= 2,
108};
109
110static struct resource gtwx5715_flash_resource = {
111	.flags		= IORESOURCE_MEM,
112};
113
114static struct platform_device gtwx5715_flash = {
115	.name		= "IXP4XX-Flash",
116	.id		= 0,
117	.dev		= {
118		.platform_data = &gtwx5715_flash_data,
119	},
120	.num_resources	= 1,
121	.resource	= &gtwx5715_flash_resource,
122};
123
124static struct platform_device *gtwx5715_devices[] __initdata = {
125	&gtwx5715_uart_device,
126	&gtwx5715_flash,
127};
128
129static void __init gtwx5715_init(void)
130{
131	ixp4xx_sys_init();
132
133	gtwx5715_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
134	gtwx5715_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + SZ_8M - 1;
135
136	platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices));
137}
138
139
140MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)")
141	/* Maintainer: George Joseph */
142	.phys_io	= IXP4XX_UART2_BASE_PHYS,
143	.io_pg_offst	= ((IXP4XX_UART2_BASE_VIRT) >> 18) & 0xfffc,
144	.map_io		= ixp4xx_map_io,
145	.init_irq	= ixp4xx_init_irq,
146	.timer		= &ixp4xx_timer,
147	.boot_params	= 0x0100,
148	.init_machine	= gtwx5715_init,
149MACHINE_END
150