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
25 #include <asm/mach-types.h>
26 #include <asm/mach/map.h>
27 #include <asm/mach/arch.h>
28
29 #include "soc.h"
30 #include "ts72xx.h"
31
32 static struct map_desc ts72xx_io_desc[] __initdata = {
33 {
34 .virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE,
35 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
36 .length = TS72XX_MODEL_SIZE,
37 .type = MT_DEVICE,
38 }, {
39 .virtual = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
40 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
41 .length = TS72XX_OPTIONS_SIZE,
42 .type = MT_DEVICE,
43 }, {
44 .virtual = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
45 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
46 .length = TS72XX_OPTIONS2_SIZE,
47 .type = MT_DEVICE,
48 }, {
49 .virtual = (unsigned long)TS72XX_RTC_INDEX_VIRT_BASE,
50 .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
51 .length = TS72XX_RTC_INDEX_SIZE,
52 .type = MT_DEVICE,
53 }, {
54 .virtual = (unsigned long)TS72XX_RTC_DATA_VIRT_BASE,
55 .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
56 .length = TS72XX_RTC_DATA_SIZE,
57 .type = MT_DEVICE,
58 }
59 };
60
ts72xx_map_io(void)61 static void __init ts72xx_map_io(void)
62 {
63 ep93xx_map_io();
64 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
65 }
66
67
68 /*************************************************************************
69 * NAND flash
70 *************************************************************************/
71 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
72 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
73
ts72xx_nand_hwcontrol(struct mtd_info * mtd,int cmd,unsigned int ctrl)74 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
75 int cmd, unsigned int ctrl)
76 {
77 struct nand_chip *chip = mtd->priv;
78
79 if (ctrl & NAND_CTRL_CHANGE) {
80 void __iomem *addr = chip->IO_ADDR_R;
81 unsigned char bits;
82
83 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
84
85 bits = __raw_readb(addr) & ~0x07;
86 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
87 bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
88 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
89
90 __raw_writeb(bits, addr);
91 }
92
93 if (cmd != NAND_CMD_NONE)
94 __raw_writeb(cmd, chip->IO_ADDR_W);
95 }
96
ts72xx_nand_device_ready(struct mtd_info * mtd)97 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
98 {
99 struct nand_chip *chip = mtd->priv;
100 void __iomem *addr = chip->IO_ADDR_R;
101
102 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
103
104 return !!(__raw_readb(addr) & 0x20);
105 }
106
107 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
108 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
109
110 static struct mtd_partition ts72xx_nand_parts[] = {
111 {
112 .name = "TS-BOOTROM",
113 .offset = 0,
114 .size = TS72XX_BOOTROM_PART_SIZE,
115 .mask_flags = MTD_WRITEABLE, /* force read-only */
116 }, {
117 .name = "Linux",
118 .offset = MTDPART_OFS_RETAIN,
119 .size = TS72XX_REDBOOT_PART_SIZE,
120 /* leave so much for last partition */
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 struct platform_nand_data ts72xx_nand_data = {
130 .chip = {
131 .nr_chips = 1,
132 .chip_offset = 0,
133 .chip_delay = 15,
134 .partitions = ts72xx_nand_parts,
135 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
136 },
137 .ctrl = {
138 .cmd_ctrl = ts72xx_nand_hwcontrol,
139 .dev_ready = ts72xx_nand_device_ready,
140 },
141 };
142
143 static struct resource ts72xx_nand_resource[] = {
144 {
145 .start = 0, /* filled in later */
146 .end = 0, /* filled in later */
147 .flags = IORESOURCE_MEM,
148 },
149 };
150
151 static struct platform_device ts72xx_nand_flash = {
152 .name = "gen_nand",
153 .id = -1,
154 .dev.platform_data = &ts72xx_nand_data,
155 .resource = ts72xx_nand_resource,
156 .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
157 };
158
159
ts72xx_register_flash(void)160 static void __init ts72xx_register_flash(void)
161 {
162 /*
163 * TS7200 has NOR flash all other TS72xx board have NAND flash.
164 */
165 if (board_is_ts7200()) {
166 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
167 } else {
168 resource_size_t start;
169
170 if (is_ts9420_installed())
171 start = EP93XX_CS7_PHYS_BASE;
172 else
173 start = EP93XX_CS6_PHYS_BASE;
174
175 ts72xx_nand_resource[0].start = start;
176 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
177
178 platform_device_register(&ts72xx_nand_flash);
179 }
180 }
181
182
ts72xx_rtc_readbyte(unsigned long addr)183 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
184 {
185 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
186 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
187 }
188
ts72xx_rtc_writebyte(unsigned char value,unsigned long addr)189 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
190 {
191 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
192 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
193 }
194
195 static struct m48t86_ops ts72xx_rtc_ops = {
196 .readbyte = ts72xx_rtc_readbyte,
197 .writebyte = ts72xx_rtc_writebyte,
198 };
199
200 static struct platform_device ts72xx_rtc_device = {
201 .name = "rtc-m48t86",
202 .id = -1,
203 .dev = {
204 .platform_data = &ts72xx_rtc_ops,
205 },
206 .num_resources = 0,
207 };
208
209 static struct resource ts72xx_wdt_resources[] = {
210 {
211 .start = TS72XX_WDT_CONTROL_PHYS_BASE,
212 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
213 .flags = IORESOURCE_MEM,
214 },
215 {
216 .start = TS72XX_WDT_FEED_PHYS_BASE,
217 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
218 .flags = IORESOURCE_MEM,
219 },
220 };
221
222 static struct platform_device ts72xx_wdt_device = {
223 .name = "ts72xx-wdt",
224 .id = -1,
225 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
226 .resource = ts72xx_wdt_resources,
227 };
228
229 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
230 .phy_id = 1,
231 };
232
ts72xx_init_machine(void)233 static void __init ts72xx_init_machine(void)
234 {
235 ep93xx_init_devices();
236 ts72xx_register_flash();
237 platform_device_register(&ts72xx_rtc_device);
238 platform_device_register(&ts72xx_wdt_device);
239
240 ep93xx_register_eth(&ts72xx_eth_data, 1);
241 }
242
243 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
244 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
245 .atag_offset = 0x100,
246 .map_io = ts72xx_map_io,
247 .init_irq = ep93xx_init_irq,
248 .init_time = ep93xx_timer_init,
249 .init_machine = ts72xx_init_machine,
250 .init_late = ep93xx_init_late,
251 .restart = ep93xx_restart,
252 MACHINE_END
253