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1da177e4 LT |
1 | /* |
2 | * arch/arm/mach-ixp4xx/gtwx5715-setup.c | |
3 | * | |
4 | * Gemtek GTWX5715 (Linksys WRV54G) board settup | |
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 | ||
31 | #include <asm/types.h> | |
32 | #include <asm/setup.h> | |
33 | #include <asm/memory.h> | |
34 | #include <asm/hardware.h> | |
35 | #include <asm/irq.h> | |
36 | #include <asm/mach-types.h> | |
37 | #include <asm/mach/arch.h> | |
38 | #include <asm/mach/flash.h> | |
39 | #include <asm/arch/gtwx5715.h> | |
40 | ||
41 | /* | |
42 | * Xscale UART registers are 32 bits wide with only the least | |
43 | * significant 8 bits having any meaning. From a configuration | |
44 | * perspective, this means 2 things... | |
45 | * | |
46 | * Setting .regshift = 2 so that the standard 16550 registers | |
47 | * line up on every 4th byte. | |
48 | * | |
49 | * Shifting the register start virtual address +3 bytes when | |
50 | * compiled big-endian. Since register writes are done on a | |
51 | * single byte basis, if the shift isn't done the driver will | |
52 | * write the value into the most significant byte of the register, | |
53 | * which is ignored, instead of the least significant. | |
54 | */ | |
55 | ||
56 | #ifdef __ARMEB__ | |
57 | #define REG_OFFSET 3 | |
58 | #else | |
59 | #define REG_OFFSET 0 | |
60 | #endif | |
61 | ||
62 | /* | |
63 | * Only the second or "console" uart is connected on the gtwx5715. | |
64 | */ | |
65 | ||
66 | static struct resource gtwx5715_uart_resources[] = { | |
67 | { | |
68 | .start = IXP4XX_UART2_BASE_PHYS, | |
69 | .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, | |
70 | .flags = IORESOURCE_MEM, | |
71 | }, | |
72 | { | |
73 | .start = IRQ_IXP4XX_UART2, | |
74 | .end = IRQ_IXP4XX_UART2, | |
75 | .flags = IORESOURCE_IRQ, | |
76 | }, | |
77 | { }, | |
78 | }; | |
79 | ||
80 | ||
81 | static struct plat_serial8250_port gtwx5715_uart_platform_data[] = { | |
82 | { | |
83 | .mapbase = IXP4XX_UART2_BASE_PHYS, | |
84 | .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, | |
85 | .irq = IRQ_IXP4XX_UART2, | |
86 | .flags = UPF_BOOT_AUTOCONF, | |
87 | .iotype = UPIO_MEM, | |
88 | .regshift = 2, | |
89 | .uartclk = IXP4XX_UART_XTAL, | |
90 | }, | |
91 | { }, | |
92 | }; | |
93 | ||
94 | static struct platform_device gtwx5715_uart_device = { | |
95 | .name = "serial8250", | |
96 | .id = 0, | |
97 | .dev = { | |
98 | .platform_data = gtwx5715_uart_platform_data, | |
99 | }, | |
100 | .num_resources = 2, | |
101 | .resource = gtwx5715_uart_resources, | |
102 | }; | |
103 | ||
104 | ||
105 | void __init gtwx5715_map_io(void) | |
106 | { | |
107 | ixp4xx_map_io(); | |
108 | } | |
109 | ||
110 | static struct flash_platform_data gtwx5715_flash_data = { | |
111 | .map_name = "cfi_probe", | |
112 | .width = 2, | |
113 | }; | |
114 | ||
115 | static struct resource gtwx5715_flash_resource = { | |
116 | .start = GTWX5715_FLASH_BASE, | |
117 | .end = GTWX5715_FLASH_BASE + GTWX5715_FLASH_SIZE, | |
118 | .flags = IORESOURCE_MEM, | |
119 | }; | |
120 | ||
121 | static struct platform_device gtwx5715_flash = { | |
122 | .name = "IXP4XX-Flash", | |
123 | .id = 0, | |
124 | .dev = { | |
125 | .platform_data = >wx5715_flash_data, | |
126 | }, | |
127 | .num_resources = 1, | |
128 | .resource = >wx5715_flash_resource, | |
129 | }; | |
130 | ||
131 | static struct platform_device *gtwx5715_devices[] __initdata = { | |
132 | >wx5715_uart_device, | |
133 | >wx5715_flash, | |
134 | }; | |
135 | ||
136 | static void __init gtwx5715_init(void) | |
137 | { | |
138 | platform_add_devices(gtwx5715_devices, ARRAY_SIZE(gtwx5715_devices)); | |
139 | } | |
140 | ||
141 | ||
142 | MACHINE_START(GTWX5715, "Gemtek GTWX5715 (Linksys WRV54G)") | |
143 | MAINTAINER("George Joseph") | |
144 | BOOT_MEM(PHYS_OFFSET, IXP4XX_UART2_BASE_PHYS, | |
145 | IXP4XX_UART2_BASE_VIRT) | |
146 | MAPIO(gtwx5715_map_io) | |
147 | INITIRQ(ixp4xx_init_irq) | |
148 | .timer = &ixp4xx_timer, | |
149 | BOOT_PARAMS(0x0100) | |
150 | INIT_MACHINE(gtwx5715_init) | |
151 | MACHINE_END | |
152 | ||
153 |