2 * arch/arm/mach-ep93xx/ts72xx.c
3 * Technologic Systems TS72xx SBC support.
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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.
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
19 #include <linux/m48t86.h>
20 #include <linux/mtd/physmap.h>
21 #include <linux/mtd/nand.h>
22 #include <linux/mtd/partitions.h>
24 #include <mach/hardware.h>
25 #include <mach/ts72xx.h>
27 #include <asm/mach-types.h>
28 #include <asm/mach/map.h>
29 #include <asm/mach/arch.h>
32 static struct map_desc ts72xx_io_desc[] __initdata = {
34 .virtual = TS72XX_MODEL_VIRT_BASE,
35 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
36 .length = TS72XX_MODEL_SIZE,
39 .virtual = TS72XX_OPTIONS_VIRT_BASE,
40 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
41 .length = TS72XX_OPTIONS_SIZE,
44 .virtual = TS72XX_OPTIONS2_VIRT_BASE,
45 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
46 .length = TS72XX_OPTIONS2_SIZE,
49 .virtual = TS72XX_RTC_INDEX_VIRT_BASE,
50 .pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
51 .length = TS72XX_RTC_INDEX_SIZE,
54 .virtual = TS72XX_RTC_DATA_VIRT_BASE,
55 .pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
56 .length = TS72XX_RTC_DATA_SIZE,
61 static void __init ts72xx_map_io(void)
64 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
68 /*************************************************************************
70 *************************************************************************/
71 #define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
72 #define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
74 static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
75 int cmd, unsigned int ctrl)
77 struct nand_chip *chip = mtd->priv;
79 if (ctrl & NAND_CTRL_CHANGE) {
80 void __iomem *addr = chip->IO_ADDR_R;
83 addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
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 */
90 __raw_writeb(bits, addr);
93 if (cmd != NAND_CMD_NONE)
94 __raw_writeb(cmd, chip->IO_ADDR_W);
97 static int ts72xx_nand_device_ready(struct mtd_info *mtd)
99 struct nand_chip *chip = mtd->priv;
100 void __iomem *addr = chip->IO_ADDR_R;
102 addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
104 return !!(__raw_readb(addr) & 0x20);
107 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
109 #define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
110 #define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
112 static struct mtd_partition ts72xx_nand_parts[] = {
114 .name = "TS-BOOTROM",
116 .size = TS72XX_BOOTROM_PART_SIZE,
117 .mask_flags = MTD_WRITEABLE, /* force read-only */
120 .offset = MTDPART_OFS_APPEND,
121 .size = 0, /* filled in later */
124 .offset = MTDPART_OFS_APPEND,
125 .size = MTDPART_SIZ_FULL,
126 .mask_flags = MTD_WRITEABLE, /* force read-only */
130 static void ts72xx_nand_set_parts(uint64_t size,
131 struct platform_nand_chip *chip)
133 /* Factory TS-72xx boards only come with 32MiB or 128MiB NAND options */
134 if (size == SZ_32M || size == SZ_128M) {
135 /* Set the "Linux" partition size */
136 ts72xx_nand_parts[1].size = size - TS72XX_REDBOOT_PART_SIZE;
138 chip->partitions = ts72xx_nand_parts;
139 chip->nr_partitions = ARRAY_SIZE(ts72xx_nand_parts);
141 pr_warning("Unknown nand disk size:%lluMiB\n", size >> 20);
145 static struct platform_nand_data ts72xx_nand_data = {
150 .part_probe_types = ts72xx_nand_part_probes,
151 .set_parts = ts72xx_nand_set_parts,
154 .cmd_ctrl = ts72xx_nand_hwcontrol,
155 .dev_ready = ts72xx_nand_device_ready,
159 static struct resource ts72xx_nand_resource[] = {
161 .start = 0, /* filled in later */
162 .end = 0, /* filled in later */
163 .flags = IORESOURCE_MEM,
167 static struct platform_device ts72xx_nand_flash = {
170 .dev.platform_data = &ts72xx_nand_data,
171 .resource = ts72xx_nand_resource,
172 .num_resources = ARRAY_SIZE(ts72xx_nand_resource),
176 /*************************************************************************
177 * NOR flash (TS-7200 only)
178 *************************************************************************/
179 static struct physmap_flash_data ts72xx_nor_data = {
183 static struct resource ts72xx_nor_resource = {
184 .start = EP93XX_CS6_PHYS_BASE,
185 .end = EP93XX_CS6_PHYS_BASE + SZ_16M - 1,
186 .flags = IORESOURCE_MEM,
189 static struct platform_device ts72xx_nor_flash = {
190 .name = "physmap-flash",
192 .dev.platform_data = &ts72xx_nor_data,
193 .resource = &ts72xx_nor_resource,
197 static void __init ts72xx_register_flash(void)
199 if (board_is_ts7200()) {
200 platform_device_register(&ts72xx_nor_flash);
202 resource_size_t start;
204 if (is_ts9420_installed())
205 start = EP93XX_CS7_PHYS_BASE;
207 start = EP93XX_CS6_PHYS_BASE;
209 ts72xx_nand_resource[0].start = start;
210 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
212 platform_device_register(&ts72xx_nand_flash);
217 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
219 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
220 return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
223 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
225 __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
226 __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
229 static struct m48t86_ops ts72xx_rtc_ops = {
230 .readbyte = ts72xx_rtc_readbyte,
231 .writebyte = ts72xx_rtc_writebyte,
234 static struct platform_device ts72xx_rtc_device = {
235 .name = "rtc-m48t86",
238 .platform_data = &ts72xx_rtc_ops,
243 static struct resource ts72xx_wdt_resources[] = {
245 .start = TS72XX_WDT_CONTROL_PHYS_BASE,
246 .end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
247 .flags = IORESOURCE_MEM,
250 .start = TS72XX_WDT_FEED_PHYS_BASE,
251 .end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
252 .flags = IORESOURCE_MEM,
256 static struct platform_device ts72xx_wdt_device = {
257 .name = "ts72xx-wdt",
259 .num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
260 .resource = ts72xx_wdt_resources,
263 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
267 static void __init ts72xx_init_machine(void)
269 ep93xx_init_devices();
270 ts72xx_register_flash();
271 platform_device_register(&ts72xx_rtc_device);
272 platform_device_register(&ts72xx_wdt_device);
274 ep93xx_register_eth(&ts72xx_eth_data, 1);
277 MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
278 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
279 .phys_io = EP93XX_APB_PHYS_BASE,
280 .io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
281 .boot_params = EP93XX_SDCE3_PHYS_BASE_SYNC + 0x100,
282 .map_io = ts72xx_map_io,
283 .init_irq = ep93xx_init_irq,
284 .timer = &ep93xx_timer,
285 .init_machine = ts72xx_init_machine,