arch/arm/mach-clps711x/board-autcpu12.c

   1 /*
   2  *  linux/arch/arm/mach-clps711x/autcpu12.c
   3  *
   4  * (c) 2001 Thomas Gleixner, autronix automation <gleixner@autronix.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/types.h>
  23 #include <linux/string.h>
  24 #include <linux/mm.h>
  25 #include <linux/io.h>
  26 #include <linux/gpio.h>
  27 #include <linux/ioport.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/mtd/physmap.h>
  30 #include <linux/mtd/plat-ram.h>
  31 #include <linux/mtd/partitions.h>
  32 #include <linux/mtd/nand-gpio.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/basic_mmio_gpio.h>
  35
  36 #include <mach/hardware.h>
  37 #include <asm/sizes.h>
  38 #include <asm/setup.h>
  39 #include <asm/mach-types.h>
  40 #include <asm/mach/arch.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/page.h>
  43
  44 #include <asm/mach/map.h>
  45
  46 #include "common.h"
  47 #include "devices.h"
  48
  49 /* NOR flash */
  50 #define AUTCPU12_FLASH_BASE     (CS0_PHYS_BASE)
  51
  52 /* Board specific hardware definitions */
  53 #define AUTCPU12_CHAR_LCD_BASE  (CS1_PHYS_BASE + 0x00000000)
  54 #define AUTCPU12_CSAUX1_BASE    (CS1_PHYS_BASE + 0x04000000)
  55 #define AUTCPU12_CAN_BASE       (CS1_PHYS_BASE + 0x08000000)
  56 #define AUTCPU12_TOUCH_BASE     (CS1_PHYS_BASE + 0x0a000000)
  57 #define AUTCPU12_IO_BASE        (CS1_PHYS_BASE + 0x0c000000)
  58 #define AUTCPU12_LPT_BASE       (CS1_PHYS_BASE + 0x0e000000)
  59
  60 /* NVRAM */
  61 #define AUTCPU12_NVRAM_BASE     (CS1_PHYS_BASE + 0x02000000)
  62
  63 /* SmartMedia flash */
  64 #define AUTCPU12_SMC_BASE       (CS1_PHYS_BASE + 0x06000000)
  65 #define AUTCPU12_SMC_SEL_BASE   (AUTCPU12_SMC_BASE + 0x10)
  66
  67 /* Ethernet */
  68 #define AUTCPU12_CS8900_BASE    (CS2_PHYS_BASE + 0x300)
  69 #define AUTCPU12_CS8900_IRQ     (IRQ_EINT3)
  70
  71 /* NAND flash */
  72 #define AUTCPU12_MMGPIO_BASE    (CLPS711X_NR_GPIO)
  73 #define AUTCPU12_SMC_NCE        (AUTCPU12_MMGPIO_BASE + 0) /* Bit 0 */
  74 #define AUTCPU12_SMC_RDY        CLPS711X_GPIO(1, 2)
  75 #define AUTCPU12_SMC_ALE        CLPS711X_GPIO(1, 3)
  76 #define AUTCPU12_SMC_CLE        CLPS711X_GPIO(1, 4)
  77
  78 /* LCD contrast digital potentiometer */
  79 #define AUTCPU12_DPOT_CS        CLPS711X_GPIO(4, 0)
  80 #define AUTCPU12_DPOT_CLK       CLPS711X_GPIO(4, 1)
  81 #define AUTCPU12_DPOT_UD        CLPS711X_GPIO(4, 2)
  82
  83 static struct resource autcpu12_cs8900_resource[] __initdata = {
  84         DEFINE_RES_MEM(AUTCPU12_CS8900_BASE, SZ_1K),
  85         DEFINE_RES_IRQ(AUTCPU12_CS8900_IRQ),
  86 };
  87
  88 static struct resource autcpu12_nand_resource[] __initdata = {
  89         DEFINE_RES_MEM(AUTCPU12_SMC_BASE, SZ_16),
  90 };
  91
  92 static struct mtd_partition autcpu12_nand_parts[] __initdata = {
  93         {
  94                 .name   = "Flash partition 1",
  95                 .offset = 0,
  96                 .size   = SZ_8M,
  97         },
  98         {
  99                 .name   = "Flash partition 2",
 100                 .offset = MTDPART_OFS_APPEND,
 101                 .size   = MTDPART_SIZ_FULL,
 102         },
 103 };
 104
 105 static void __init autcpu12_adjust_parts(struct gpio_nand_platdata *pdata,
 106                                          size_t sz)
 107 {
 108         switch (sz) {
 109         case SZ_16M:
 110         case SZ_32M:
 111                 break;
 112         case SZ_64M:
 113         case SZ_128M:
 114                 pdata->parts[0].size = SZ_16M;
 115                 break;
 116         default:
 117                 pr_warn("Unsupported SmartMedia device size %u\n", sz);
 118                 break;
 119         }
 120 }
 121
 122 static struct gpio_nand_platdata autcpu12_nand_pdata __initdata = {
 123         .gpio_rdy       = AUTCPU12_SMC_RDY,
 124         .gpio_nce       = AUTCPU12_SMC_NCE,
 125         .gpio_ale       = AUTCPU12_SMC_ALE,
 126         .gpio_cle       = AUTCPU12_SMC_CLE,
 127         .gpio_nwp       = -1,
 128         .chip_delay     = 20,
 129         .parts          = autcpu12_nand_parts,
 130         .num_parts      = ARRAY_SIZE(autcpu12_nand_parts),
 131         .adjust_parts   = autcpu12_adjust_parts,
 132 };
 133
 134 static struct platform_device autcpu12_nand_pdev __initdata = {
 135         .name           = "gpio-nand",
 136         .id             = -1,
 137         .resource       = autcpu12_nand_resource,
 138         .num_resources  = ARRAY_SIZE(autcpu12_nand_resource),
 139         .dev            = {
 140                 .platform_data = &autcpu12_nand_pdata,
 141         },
 142 };
 143
 144 static struct resource autcpu12_mmgpio_resource[] __initdata = {
 145         DEFINE_RES_MEM_NAMED(AUTCPU12_SMC_SEL_BASE, SZ_1, "dat"),
 146 };
 147
 148 static struct bgpio_pdata autcpu12_mmgpio_pdata __initdata = {
 149         .base   = AUTCPU12_MMGPIO_BASE,
 150         .ngpio  = 8,
 151 };
 152
 153 static struct platform_device autcpu12_mmgpio_pdev __initdata = {
 154         .name           = "basic-mmio-gpio",
 155         .id             = -1,
 156         .resource       = autcpu12_mmgpio_resource,
 157         .num_resources  = ARRAY_SIZE(autcpu12_mmgpio_resource),
 158         .dev            = {
 159                 .platform_data = &autcpu12_mmgpio_pdata,
 160         },
 161 };
 162
 163 static const struct gpio const autcpu12_gpios[] __initconst = {
 164         { AUTCPU12_DPOT_CS,     GPIOF_OUT_INIT_HIGH,    "DPOT CS" },
 165         { AUTCPU12_DPOT_CLK,    GPIOF_OUT_INIT_LOW,     "DPOT CLK" },
 166         { AUTCPU12_DPOT_UD,     GPIOF_OUT_INIT_LOW,     "DPOT UD" },
 167 };
 168
 169 static struct mtd_partition autcpu12_flash_partitions[] = {
 170         {
 171                 .name   = "NOR.0",
 172                 .offset = 0,
 173                 .size   = MTDPART_SIZ_FULL,
 174         },
 175 };
 176
 177 static struct physmap_flash_data autcpu12_flash_pdata = {
 178         .width          = 4,
 179         .parts          = autcpu12_flash_partitions,
 180         .nr_parts       = ARRAY_SIZE(autcpu12_flash_partitions),
 181 };
 182
 183 static struct resource autcpu12_flash_resources[] __initdata = {
 184         DEFINE_RES_MEM(AUTCPU12_FLASH_BASE, SZ_8M),
 185 };
 186
 187 static struct platform_device autcpu12_flash_pdev __initdata = {
 188         .name           = "physmap-flash",
 189         .id             = 0,
 190         .resource       = autcpu12_flash_resources,
 191         .num_resources  = ARRAY_SIZE(autcpu12_flash_resources),
 192         .dev            = {
 193                 .platform_data  = &autcpu12_flash_pdata,
 194         },
 195 };
 196
 197 static struct resource autcpu12_nvram_resource[] __initdata = {
 198         DEFINE_RES_MEM(AUTCPU12_NVRAM_BASE, 0),
 199 };
 200
 201 static struct platdata_mtd_ram autcpu12_nvram_pdata = {
 202         .bankwidth      = 4,
 203 };
 204
 205 static struct platform_device autcpu12_nvram_pdev __initdata = {
 206         .name           = "mtd-ram",
 207         .id             = 0,
 208         .resource       = autcpu12_nvram_resource,
 209         .num_resources  = ARRAY_SIZE(autcpu12_nvram_resource),
 210         .dev            = {
 211                 .platform_data  = &autcpu12_nvram_pdata,
 212         },
 213 };
 214
 215 static void __init autcpu12_nvram_init(void)
 216 {
 217         void __iomem *nvram;
 218         unsigned int save[2];
 219         resource_size_t nvram_size = SZ_128K;
 220
 221         /*
 222          * Check for 32K/128K
 223          * Read ofs 0K
 224          * Read ofs 64K
 225          * Write complement to ofs 64K
 226          * Read and check result on ofs 0K
 227          * Restore contents
 228          */
 229         nvram = ioremap(autcpu12_nvram_resource[0].start, SZ_128K);
 230         if (nvram) {
 231                 save[0] = readl(nvram + 0);
 232                 save[1] = readl(nvram + SZ_64K);
 233                 writel(~save[0], nvram + SZ_64K);
 234                 if (readl(nvram + 0) != save[0]) {
 235                         writel(save[0], nvram + 0);
 236                         nvram_size = SZ_32K;
 237                 } else
 238                         writel(save[1], nvram + SZ_64K);
 239                 iounmap(nvram);
 240
 241                 autcpu12_nvram_resource[0].end =
 242                         autcpu12_nvram_resource[0].start + nvram_size - 1;
 243                 platform_device_register(&autcpu12_nvram_pdev);
 244         } else
 245                 pr_err("Failed to remap NVRAM resource\n");
 246 }
 247
 248 static void __init autcpu12_init(void)
 249 {
 250         clps711x_devices_init();
 251         platform_device_register(&autcpu12_flash_pdev);
 252         platform_device_register_simple("video-clps711x", 0, NULL, 0);
 253         platform_device_register_simple("cs89x0", 0, autcpu12_cs8900_resource,
 254                                         ARRAY_SIZE(autcpu12_cs8900_resource));
 255         platform_device_register(&autcpu12_mmgpio_pdev);
 256         autcpu12_nvram_init();
 257 }
 258
 259 static void __init autcpu12_init_late(void)
 260 {
 261         gpio_request_array(autcpu12_gpios, ARRAY_SIZE(autcpu12_gpios));
 262         platform_device_register(&autcpu12_nand_pdev);
 263 }
 264
 265 MACHINE_START(AUTCPU12, "autronix autcpu12")
 266         /* Maintainer: Thomas Gleixner */
 267         .atag_offset    = 0x20000,
 268         .map_io         = clps711x_map_io,
 269         .init_irq       = clps711x_init_irq,
 270         .init_time      = clps711x_timer_init,
 271         .init_machine   = autcpu12_init,
 272         .init_late      = autcpu12_init_late,
 273         .restart        = clps711x_restart,
 274 MACHINE_END
 275