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
32static 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
61static 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
74static 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
97static 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
110static 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
129static 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
143static 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
151static 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
160static 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
183static 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
189static 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
195static struct m48t86_ops ts72xx_rtc_ops = {
196	.readbyte	= ts72xx_rtc_readbyte,
197	.writebyte	= ts72xx_rtc_writebyte,
198};
199
200static 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
209static 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
222static 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
229static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
230	.phy_id		= 1,
231};
232
233static 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
243MACHINE_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,
252MACHINE_END
253