Merge branch 'rio.b19' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/bird
[linux-2.6] / arch / arm / mach-ep93xx / ts72xx.c
1 /*
2  * arch/arm/mach-ep93xx/ts72xx.c
3  * Technologic Systems TS72xx SBC support.
4  *
5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or (at
10  * your option) any later version.
11  */
12
13 #include <linux/config.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/mm.h>
17 #include <linux/sched.h>
18 #include <linux/interrupt.h>
19 #include <linux/mtd/physmap.h>
20 #include <linux/platform_device.h>
21 #include <linux/m48t86.h>
22 #include <asm/io.h>
23 #include <asm/hardware.h>
24 #include <asm/mach-types.h>
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
27
28 static struct map_desc ts72xx_io_desc[] __initdata = {
29         {
30                 .virtual        = TS72XX_MODEL_VIRT_BASE,
31                 .pfn            = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
32                 .length         = TS72XX_MODEL_SIZE,
33                 .type           = MT_DEVICE,
34         }, {
35                 .virtual        = TS72XX_OPTIONS_VIRT_BASE,
36                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
37                 .length         = TS72XX_OPTIONS_SIZE,
38                 .type           = MT_DEVICE,
39         }, {
40                 .virtual        = TS72XX_OPTIONS2_VIRT_BASE,
41                 .pfn            = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
42                 .length         = TS72XX_OPTIONS2_SIZE,
43                 .type           = MT_DEVICE,
44         }, {
45                 .virtual        = TS72XX_RTC_INDEX_VIRT_BASE,
46                 .pfn            = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
47                 .length         = TS72XX_RTC_INDEX_SIZE,
48                 .type           = MT_DEVICE,
49         }, {
50                 .virtual        = TS72XX_RTC_DATA_VIRT_BASE,
51                 .pfn            = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
52                 .length         = TS72XX_RTC_DATA_SIZE,
53                 .type           = MT_DEVICE,
54         }
55 };
56
57 static struct map_desc ts72xx_nand_io_desc[] __initdata = {
58         {
59                 .virtual        = TS72XX_NAND_DATA_VIRT_BASE,
60                 .pfn            = __phys_to_pfn(TS72XX_NAND1_DATA_PHYS_BASE),
61                 .length         = TS72XX_NAND_DATA_SIZE,
62                 .type           = MT_DEVICE,
63         }, {
64                 .virtual        = TS72XX_NAND_CONTROL_VIRT_BASE,
65                 .pfn            = __phys_to_pfn(TS72XX_NAND1_CONTROL_PHYS_BASE),
66                 .length         = TS72XX_NAND_CONTROL_SIZE,
67                 .type           = MT_DEVICE,
68         }, {
69                 .virtual        = TS72XX_NAND_BUSY_VIRT_BASE,
70                 .pfn            = __phys_to_pfn(TS72XX_NAND1_BUSY_PHYS_BASE),
71                 .length         = TS72XX_NAND_BUSY_SIZE,
72                 .type           = MT_DEVICE,
73         }
74 };
75
76 static struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
77         {
78                 .virtual        = TS72XX_NAND_DATA_VIRT_BASE,
79                 .pfn            = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
80                 .length         = TS72XX_NAND_DATA_SIZE,
81                 .type           = MT_DEVICE,
82         }, {
83                 .virtual        = TS72XX_NAND_CONTROL_VIRT_BASE,
84                 .pfn            = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
85                 .length         = TS72XX_NAND_CONTROL_SIZE,
86                 .type           = MT_DEVICE,
87         }, {
88                 .virtual        = TS72XX_NAND_BUSY_VIRT_BASE,
89                 .pfn            = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
90                 .length         = TS72XX_NAND_BUSY_SIZE,
91                 .type           = MT_DEVICE,
92         }
93 };
94
95 static void __init ts72xx_map_io(void)
96 {
97         ep93xx_map_io();
98         iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
99
100         /*
101          * The TS-7200 has NOR flash, the other models have NAND flash.
102          */
103         if (!board_is_ts7200()) {
104                 if (is_ts9420_installed()) {
105                         iotable_init(ts72xx_alternate_nand_io_desc,
106                                 ARRAY_SIZE(ts72xx_alternate_nand_io_desc));
107                 } else {
108                         iotable_init(ts72xx_nand_io_desc,
109                                 ARRAY_SIZE(ts72xx_nand_io_desc));
110                 }
111         }
112 }
113
114 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
115 {
116         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
117         return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
118 }
119
120 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
121 {
122         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
123         __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
124 }
125
126 static struct m48t86_ops ts72xx_rtc_ops = {
127         .readbyte               = ts72xx_rtc_readbyte,
128         .writebyte              = ts72xx_rtc_writebyte,
129 };
130
131 static struct platform_device ts72xx_rtc_device = {
132         .name                   = "rtc-m48t86",
133         .id                     = -1,
134         .dev                    = {
135                 .platform_data          = &ts72xx_rtc_ops,
136         },
137         .num_resources          = 0,
138 };
139
140 static void __init ts72xx_init_machine(void)
141 {
142         ep93xx_init_devices();
143         if (board_is_ts7200())
144                 physmap_configure(TS72XX_NOR_PHYS_BASE, 0x01000000, 1, NULL);
145         platform_device_register(&ts72xx_rtc_device);
146 }
147
148 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
149         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
150         .phys_io        = EP93XX_APB_PHYS_BASE,
151         .io_pg_offst    = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
152         .boot_params    = 0x00000100,
153         .map_io         = ts72xx_map_io,
154         .init_irq       = ep93xx_init_irq,
155         .timer          = &ep93xx_timer,
156         .init_machine   = ts72xx_init_machine,
157 MACHINE_END