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 <mach/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 <mach/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
67 static 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
82 static 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
95 static 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
105 static struct flash_platform_data gtwx5715_flash_data = {
106 .map_name = "cfi_probe",
107 .width = 2,
108 };
109
110 static struct resource gtwx5715_flash_resource = {
111 .flags = IORESOURCE_MEM,
112 };
113
114 static struct platform_device gtwx5715_flash = {
115 .name = "IXP4XX-Flash",
116 .id = 0,
117 .dev = {
118 .platform_data = >wx5715_flash_data,
119 },
120 .num_resources = 1,
121 .resource = >wx5715_flash_resource,
122 };
123
124 static struct platform_device *gtwx5715_devices[] __initdata = {
125 >wx5715_uart_device,
126 >wx5715_flash,
127 };
128
gtwx5715_init(void)129 static 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
140 MACHINE_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,
149 MACHINE_END
150
151
152