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x86: Fix compilation bug in kprobes' twobyte_is_boostable
[linux-btrfs-devel.git] / arch / arm / mach-ep93xx / ts72xx.c
blobc2d2cf40ead920f323a717185b9fc715d704d96d
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19 #include <linux/m48t86.h>
20 #include <linux/mtd/nand.h>
21 #include <linux/mtd/partitions.h>
22
23 #include <mach/hardware.h>
24 #include <mach/ts72xx.h>
25
26 #include <asm/mach-types.h>
27 #include <asm/mach/map.h>
28 #include <asm/mach/arch.h>
29
30
31 static struct map_desc ts72xx_io_desc[] __initdata = {
32 {
33 .virtual = TS72XX_MODEL_VIRT_BASE,
34 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
35 .length = TS72XX_MODEL_SIZE,
36 .type = MT_DEVICE,
37 }, {
38 .virtual = TS72XX_OPTIONS_VIRT_BASE,
39 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
40 .length = TS72XX_OPTIONS_SIZE,
41 .type = MT_DEVICE,
42 }, {
43 .virtual = TS72XX_OPTIONS2_VIRT_BASE,
44 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
45 .length = TS72XX_OPTIONS2_SIZE,
46 .type = MT_DEVICE,
47 }, {
48 .virtual = TS72XX_RTC_INDEX_VIRT_BASE,
49 .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
50 .length = TS72XX_RTC_INDEX_SIZE,
51 .type = MT_DEVICE,
52 }, {
53 .virtual = TS72XX_RTC_DATA_VIRT_BASE,
54 .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
55 .length = TS72XX_RTC_DATA_SIZE,
56 .type = MT_DEVICE,
57 }
58 };
59
60 static void __init ts72xx_map_io(void)
61 {
62 ep93xx_map_io();
63 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
64 }
65
66
67 /*************************************************************************
68 * NAND flash
69 *************************************************************************/
70 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
71 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
72
73 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
74 int cmd, unsigned int ctrl)
75 {
76 struct nand_chip *chip = mtd->priv;
77
78 if (ctrl & NAND_CTRL_CHANGE) {
79 void __iomem *addr = chip->IO_ADDR_R;
80 unsigned char bits;
81
82 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
83
84 bits = __raw_readb(addr) & ~0x07;
85 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
86 bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
87 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
88
89 __raw_writeb(bits, addr);
90 }
91
92 if (cmd != NAND_CMD_NONE)
93 __raw_writeb(cmd, chip->IO_ADDR_W);
94 }
95
96 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
97 {
98 struct nand_chip *chip = mtd->priv;
99 void __iomem *addr = chip->IO_ADDR_R;
100
101 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
102
103 return !!(__raw_readb(addr) & 0x20);
104 }
105
106 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
107
108 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
109 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
110
111 static struct mtd_partition ts72xx_nand_parts[] = {
112 {
113 .name = "TS-BOOTROM",
114 .offset = 0,
115 .size = TS72XX_BOOTROM_PART_SIZE,
116 .mask_flags = MTD_WRITEABLE, /* force read-only */
117 }, {
118 .name = "Linux",
119 .offset = MTDPART_OFS_APPEND,
120 .size = 0, /* filled in later */
121 }, {
122 .name = "RedBoot",
123 .offset = MTDPART_OFS_APPEND,
124 .size = MTDPART_SIZ_FULL,
125 .mask_flags = MTD_WRITEABLE, /* force read-only */
126 },
127 };
128
129 static void ts72xx_nand_set_parts(uint64_t size,
130 struct platform_nand_chip *chip)
131 {
132 /* Factory TS-72xx boards only come with 32MiB or 128MiB NAND options */
133 if (size == SZ_32M || size == SZ_128M) {
134 /* Set the "Linux" partition size */
135 ts72xx_nand_parts[1].size = size - TS72XX_REDBOOT_PART_SIZE;
136
137 chip->partitions = ts72xx_nand_parts;
138 chip->nr_partitions = ARRAY_SIZE(ts72xx_nand_parts);
139 } else {
140 pr_warning("Unknown nand disk size:%lluMiB\n", size >> 20);
141 }
142 }
143
144 static struct platform_nand_data ts72xx_nand_data = {
145 .chip = {
146 .nr_chips = 1,
147 .chip_offset = 0,
148 .chip_delay = 15,
149 .part_probe_types = ts72xx_nand_part_probes,
150 .set_parts = ts72xx_nand_set_parts,
151 },
152 .ctrl = {
153 .cmd_ctrl = ts72xx_nand_hwcontrol,
154 .dev_ready = ts72xx_nand_device_ready,
155 },
156 };
157
158 static struct resource ts72xx_nand_resource[] = {
159 {
160 .start = 0, /* filled in later */
161 .end = 0, /* filled in later */
162 .flags = IORESOURCE_MEM,
163 },
164 };
165
166 static struct platform_device ts72xx_nand_flash = {
167 .name = "gen_nand",
168 .id = -1,
169 .dev.platform_data = &ts72xx_nand_data,
170 .resource = ts72xx_nand_resource,
171 .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
172 };
173
174
175 static void __init ts72xx_register_flash(void)
176 {
177 /*
178 * TS7200 has NOR flash all other TS72xx board have NAND flash.
179 */
180 if (board_is_ts7200()) {
181 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
182 } else {
183 resource_size_t start;
184
185 if (is_ts9420_installed())
186 start = EP93XX_CS7_PHYS_BASE;
187 else
188 start = EP93XX_CS6_PHYS_BASE;
189
190 ts72xx_nand_resource[0].start = start;
191 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
192
193 platform_device_register(&ts72xx_nand_flash);
194 }
195 }
196
197
198 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
199 {
200 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
201 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
202 }
203
204 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
205 {
206 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
207 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
208 }
209
210 static struct m48t86_ops ts72xx_rtc_ops = {
211 .readbyte = ts72xx_rtc_readbyte,
212 .writebyte = ts72xx_rtc_writebyte,
213 };
214
215 static struct platform_device ts72xx_rtc_device = {
216 .name = "rtc-m48t86",
217 .id = -1,
218 .dev = {
219 .platform_data = &ts72xx_rtc_ops,
220 },
221 .num_resources = 0,
222 };
223
224 static struct resource ts72xx_wdt_resources[] = {
225 {
226 .start = TS72XX_WDT_CONTROL_PHYS_BASE,
227 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
228 .flags = IORESOURCE_MEM,
229 },
230 {
231 .start = TS72XX_WDT_FEED_PHYS_BASE,
232 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
233 .flags = IORESOURCE_MEM,
234 },
235 };
236
237 static struct platform_device ts72xx_wdt_device = {
238 .name = "ts72xx-wdt",
239 .id = -1,
240 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
241 .resource = ts72xx_wdt_resources,
242 };
243
244 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
245 .phy_id = 1,
246 };
247
248 static void __init ts72xx_init_machine(void)
249 {
250 ep93xx_init_devices();
251 ts72xx_register_flash();
252 platform_device_register(&ts72xx_rtc_device);
253 platform_device_register(&ts72xx_wdt_device);
254
255 ep93xx_register_eth(&ts72xx_eth_data, 1);
256 }
257
258 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
259 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
260 .boot_params = EP93XX_SDCE3_PHYS_BASE_SYNC + 0x100,
261 .map_io = ts72xx_map_io,
262 .init_irq = ep93xx_init_irq,
263 .timer = &ep93xx_timer,
264 .init_machine = ts72xx_init_machine,
265 MACHINE_END
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