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/hardware/vic.h>
27 #include <asm/mach-types.h>
28 #include <asm/mach/map.h>
29 #include <asm/mach/arch.h>
30
31 #include "soc.h"
32
33 static struct map_desc ts72xx_io_desc[] __initdata = {
34 {
35 .virtual = TS72XX_MODEL_VIRT_BASE,
36 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
37 .length = TS72XX_MODEL_SIZE,
38 .type = MT_DEVICE,
39 }, {
40 .virtual = TS72XX_OPTIONS_VIRT_BASE,
41 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
42 .length = TS72XX_OPTIONS_SIZE,
43 .type = MT_DEVICE,
44 }, {
45 .virtual = TS72XX_OPTIONS2_VIRT_BASE,
46 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
47 .length = TS72XX_OPTIONS2_SIZE,
48 .type = MT_DEVICE,
49 }, {
50 .virtual = TS72XX_RTC_INDEX_VIRT_BASE,
51 .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
52 .length = TS72XX_RTC_INDEX_SIZE,
53 .type = MT_DEVICE,
54 }, {
55 .virtual = TS72XX_RTC_DATA_VIRT_BASE,
56 .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
57 .length = TS72XX_RTC_DATA_SIZE,
58 .type = MT_DEVICE,
59 }
60 };
61
ts72xx_map_io(void)62 static void __init ts72xx_map_io(void)
63 {
64 ep93xx_map_io();
65 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
66 }
67
68
69 /*************************************************************************
70 * NAND flash
71 *************************************************************************/
72 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
73 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
74
ts72xx_nand_hwcontrol(struct mtd_info * mtd,int cmd,unsigned int ctrl)75 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
76 int cmd, unsigned int ctrl)
77 {
78 struct nand_chip *chip = mtd->priv;
79
80 if (ctrl & NAND_CTRL_CHANGE) {
81 void __iomem *addr = chip->IO_ADDR_R;
82 unsigned char bits;
83
84 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
85
86 bits = __raw_readb(addr) & ~0x07;
87 bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
88 bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
89 bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
90
91 __raw_writeb(bits, addr);
92 }
93
94 if (cmd != NAND_CMD_NONE)
95 __raw_writeb(cmd, chip->IO_ADDR_W);
96 }
97
ts72xx_nand_device_ready(struct mtd_info * mtd)98 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
99 {
100 struct nand_chip *chip = mtd->priv;
101 void __iomem *addr = chip->IO_ADDR_R;
102
103 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
104
105 return !!(__raw_readb(addr) & 0x20);
106 }
107
108 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
109
110 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
111 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
112
113 static struct mtd_partition ts72xx_nand_parts[] = {
114 {
115 .name = "TS-BOOTROM",
116 .offset = 0,
117 .size = TS72XX_BOOTROM_PART_SIZE,
118 .mask_flags = MTD_WRITEABLE, /* force read-only */
119 }, {
120 .name = "Linux",
121 .offset = MTDPART_OFS_RETAIN,
122 .size = TS72XX_REDBOOT_PART_SIZE,
123 /* leave so much for last partition */
124 }, {
125 .name = "RedBoot",
126 .offset = MTDPART_OFS_APPEND,
127 .size = MTDPART_SIZ_FULL,
128 .mask_flags = MTD_WRITEABLE, /* force read-only */
129 },
130 };
131
132 static struct platform_nand_data ts72xx_nand_data = {
133 .chip = {
134 .nr_chips = 1,
135 .chip_offset = 0,
136 .chip_delay = 15,
137 .part_probe_types = ts72xx_nand_part_probes,
138 .partitions = ts72xx_nand_parts,
139 .nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
140 },
141 .ctrl = {
142 .cmd_ctrl = ts72xx_nand_hwcontrol,
143 .dev_ready = ts72xx_nand_device_ready,
144 },
145 };
146
147 static struct resource ts72xx_nand_resource[] = {
148 {
149 .start = 0, /* filled in later */
150 .end = 0, /* filled in later */
151 .flags = IORESOURCE_MEM,
152 },
153 };
154
155 static struct platform_device ts72xx_nand_flash = {
156 .name = "gen_nand",
157 .id = -1,
158 .dev.platform_data = &ts72xx_nand_data,
159 .resource = ts72xx_nand_resource,
160 .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
161 };
162
163
ts72xx_register_flash(void)164 static void __init ts72xx_register_flash(void)
165 {
166 /*
167 * TS7200 has NOR flash all other TS72xx board have NAND flash.
168 */
169 if (board_is_ts7200()) {
170 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
171 } else {
172 resource_size_t start;
173
174 if (is_ts9420_installed())
175 start = EP93XX_CS7_PHYS_BASE;
176 else
177 start = EP93XX_CS6_PHYS_BASE;
178
179 ts72xx_nand_resource[0].start = start;
180 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
181
182 platform_device_register(&ts72xx_nand_flash);
183 }
184 }
185
186
ts72xx_rtc_readbyte(unsigned long addr)187 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
188 {
189 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
190 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
191 }
192
ts72xx_rtc_writebyte(unsigned char value,unsigned long addr)193 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
194 {
195 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
196 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
197 }
198
199 static struct m48t86_ops ts72xx_rtc_ops = {
200 .readbyte = ts72xx_rtc_readbyte,
201 .writebyte = ts72xx_rtc_writebyte,
202 };
203
204 static struct platform_device ts72xx_rtc_device = {
205 .name = "rtc-m48t86",
206 .id = -1,
207 .dev = {
208 .platform_data = &ts72xx_rtc_ops,
209 },
210 .num_resources = 0,
211 };
212
213 static struct resource ts72xx_wdt_resources[] = {
214 {
215 .start = TS72XX_WDT_CONTROL_PHYS_BASE,
216 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
217 .flags = IORESOURCE_MEM,
218 },
219 {
220 .start = TS72XX_WDT_FEED_PHYS_BASE,
221 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
222 .flags = IORESOURCE_MEM,
223 },
224 };
225
226 static struct platform_device ts72xx_wdt_device = {
227 .name = "ts72xx-wdt",
228 .id = -1,
229 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
230 .resource = ts72xx_wdt_resources,
231 };
232
233 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
234 .phy_id = 1,
235 };
236
ts72xx_init_machine(void)237 static void __init ts72xx_init_machine(void)
238 {
239 ep93xx_init_devices();
240 ts72xx_register_flash();
241 platform_device_register(&ts72xx_rtc_device);
242 platform_device_register(&ts72xx_wdt_device);
243
244 ep93xx_register_eth(&ts72xx_eth_data, 1);
245 }
246
247 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
248 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
249 .atag_offset = 0x100,
250 .map_io = ts72xx_map_io,
251 .init_irq = ep93xx_init_irq,
252 .handle_irq = vic_handle_irq,
253 .timer = &ep93xx_timer,
254 .init_machine = ts72xx_init_machine,
255 .restart = ep93xx_restart,
256 MACHINE_END
257