ae7319e588c7e59ca570173d47d1e95a0fe06d0f
[pandora-kernel.git] / arch / arm / mach-ep93xx / ts72xx.c
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/physmap.h>
21 #include <linux/mtd/nand.h>
22 #include <linux/mtd/partitions.h>
23
24 #include <mach/hardware.h>
25 #include <mach/ts72xx.h>
26
27 #include <asm/mach-types.h>
28 #include <asm/mach/map.h>
29 #include <asm/mach/arch.h>
30
31
32 static struct map_desc ts72xx_io_desc[] __initdata = {
33         {
34                 .virtual        = 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        = 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        = 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        = 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        = 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
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
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
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 static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
108
109 #define TS72XX_BOOTROM_PART_SIZE        (SZ_16K)
110 #define TS72XX_REDBOOT_PART_SIZE        (SZ_2M + SZ_1M)
111
112 static struct mtd_partition ts72xx_nand_parts[] = {
113         {
114                 .name           = "TS-BOOTROM",
115                 .offset         = 0,
116                 .size           = TS72XX_BOOTROM_PART_SIZE,
117                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
118         }, {
119                 .name           = "Linux",
120                 .offset         = MTDPART_OFS_APPEND,
121                 .size           = 0,                    /* filled in later */
122         }, {
123                 .name           = "RedBoot",
124                 .offset         = MTDPART_OFS_APPEND,
125                 .size           = MTDPART_SIZ_FULL,
126                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
127         },
128 };
129
130 static void ts72xx_nand_set_parts(uint64_t size,
131                                   struct platform_nand_chip *chip)
132 {
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;
137
138                 chip->partitions = ts72xx_nand_parts;
139                 chip->nr_partitions = ARRAY_SIZE(ts72xx_nand_parts);
140         } else {
141                 pr_warning("Unknown nand disk size:%lluMiB\n", size >> 20);
142         }
143 }
144
145 static struct platform_nand_data ts72xx_nand_data = {
146         .chip = {
147                 .nr_chips       = 1,
148                 .chip_offset    = 0,
149                 .chip_delay     = 15,
150                 .part_probe_types = ts72xx_nand_part_probes,
151                 .set_parts      = ts72xx_nand_set_parts,
152         },
153         .ctrl = {
154                 .cmd_ctrl       = ts72xx_nand_hwcontrol,
155                 .dev_ready      = ts72xx_nand_device_ready,
156         },
157 };
158
159 static struct resource ts72xx_nand_resource[] = {
160         {
161                 .start          = 0,                    /* filled in later */
162                 .end            = 0,                    /* filled in later */
163                 .flags          = IORESOURCE_MEM,
164         },
165 };
166
167 static struct platform_device ts72xx_nand_flash = {
168         .name                   = "gen_nand",
169         .id                     = -1,
170         .dev.platform_data      = &ts72xx_nand_data,
171         .resource               = ts72xx_nand_resource,
172         .num_resources          = ARRAY_SIZE(ts72xx_nand_resource),
173 };
174
175
176 /*************************************************************************
177  * NOR flash (TS-7200 only)
178  *************************************************************************/
179 static struct physmap_flash_data ts72xx_nor_data = {
180         .width          = 2,
181 };
182
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,
187 };
188
189 static struct platform_device ts72xx_nor_flash = {
190         .name                   = "physmap-flash",
191         .id                     = 0,
192         .dev.platform_data      = &ts72xx_nor_data,
193         .resource               = &ts72xx_nor_resource,
194         .num_resources          = 1,
195 };
196
197 static void __init ts72xx_register_flash(void)
198 {
199         if (board_is_ts7200()) {
200                 platform_device_register(&ts72xx_nor_flash);
201         } else {
202                 resource_size_t start;
203
204                 if (is_ts9420_installed())
205                         start = EP93XX_CS7_PHYS_BASE;
206                 else
207                         start = EP93XX_CS6_PHYS_BASE;
208
209                 ts72xx_nand_resource[0].start = start;
210                 ts72xx_nand_resource[0].end = start + SZ_16M - 1;
211
212                 platform_device_register(&ts72xx_nand_flash);
213         }
214 }
215
216
217 static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
218 {
219         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
220         return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
221 }
222
223 static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
224 {
225         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
226         __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
227 }
228
229 static struct m48t86_ops ts72xx_rtc_ops = {
230         .readbyte       = ts72xx_rtc_readbyte,
231         .writebyte      = ts72xx_rtc_writebyte,
232 };
233
234 static struct platform_device ts72xx_rtc_device = {
235         .name           = "rtc-m48t86",
236         .id             = -1,
237         .dev            = {
238                 .platform_data  = &ts72xx_rtc_ops,
239         },
240         .num_resources  = 0,
241 };
242
243 static struct resource ts72xx_wdt_resources[] = {
244         {
245                 .start  = TS72XX_WDT_CONTROL_PHYS_BASE,
246                 .end    = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
247                 .flags  = IORESOURCE_MEM,
248         },
249         {
250                 .start  = TS72XX_WDT_FEED_PHYS_BASE,
251                 .end    = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
252                 .flags  = IORESOURCE_MEM,
253         },
254 };
255
256 static struct platform_device ts72xx_wdt_device = {
257         .name           = "ts72xx-wdt",
258         .id             = -1,
259         .num_resources  = ARRAY_SIZE(ts72xx_wdt_resources),
260         .resource       = ts72xx_wdt_resources,
261 };
262
263 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
264         .phy_id         = 1,
265 };
266
267 static void __init ts72xx_init_machine(void)
268 {
269         ep93xx_init_devices();
270         ts72xx_register_flash();
271         platform_device_register(&ts72xx_rtc_device);
272         platform_device_register(&ts72xx_wdt_device);
273
274         ep93xx_register_eth(&ts72xx_eth_data, 1);
275 }
276
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,
286 MACHINE_END