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   1 /* linux/arch/arm/mach-s3c2440/mach-osiris.c
   2  *
   3  * Copyright (c) 2005 Simtec Electronics
   4  *      http://armlinux.simtec.co.uk/
   5  *      Ben Dooks <ben@simtec.co.uk>
   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 version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/list.h>
  16 #include <linux/timer.h>
  17 #include <linux/init.h>
  18 #include <linux/device.h>
  19 #include <linux/sysdev.h>
  20 #include <linux/serial_core.h>
  21
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/map.h>
  24 #include <asm/mach/irq.h>
  25
  26 #include <asm/arch/osiris-map.h>
  27 #include <asm/arch/osiris-cpld.h>
  28
  29 #include <asm/hardware.h>
  30 #include <asm/io.h>
  31 #include <asm/irq.h>
  32 #include <asm/mach-types.h>
  33
  34 #include <asm/plat-s3c/regs-serial.h>
  35 #include <asm/arch/regs-gpio.h>
  36 #include <asm/arch/regs-mem.h>
  37 #include <asm/arch/regs-lcd.h>
  38 #include <asm/plat-s3c/nand.h>
  39
  40 #include <linux/mtd/mtd.h>
  41 #include <linux/mtd/nand.h>
  42 #include <linux/mtd/nand_ecc.h>
  43 #include <linux/mtd/partitions.h>
  44
  45 #include <asm/plat-s3c24xx/clock.h>
  46 #include <asm/plat-s3c24xx/devs.h>
  47 #include <asm/plat-s3c24xx/cpu.h>
  48
  49 /* onboard perihperal map */
  50
  51 static struct map_desc osiris_iodesc[] __initdata = {
  52   /* ISA IO areas (may be over-written later) */
  53
  54   {
  55           .virtual      = (u32)S3C24XX_VA_ISA_BYTE,
  56           .pfn          = __phys_to_pfn(S3C2410_CS5),
  57           .length       = SZ_16M,
  58           .type         = MT_DEVICE,
  59   }, {
  60           .virtual      = (u32)S3C24XX_VA_ISA_WORD,
  61           .pfn          = __phys_to_pfn(S3C2410_CS5),
  62           .length       = SZ_16M,
  63           .type         = MT_DEVICE,
  64   },
  65
  66   /* CPLD control registers */
  67
  68   {
  69           .virtual      = (u32)OSIRIS_VA_CTRL0,
  70           .pfn          = __phys_to_pfn(OSIRIS_PA_CTRL0),
  71           .length       = SZ_16K,
  72           .type         = MT_DEVICE,
  73   }, {
  74           .virtual      = (u32)OSIRIS_VA_CTRL1,
  75           .pfn          = __phys_to_pfn(OSIRIS_PA_CTRL1),
  76           .length       = SZ_16K,
  77           .type         = MT_DEVICE,
  78   }, {
  79           .virtual      = (u32)OSIRIS_VA_CTRL2,
  80           .pfn          = __phys_to_pfn(OSIRIS_PA_CTRL2),
  81           .length       = SZ_16K,
  82           .type         = MT_DEVICE,
  83   }, {
  84           .virtual      = (u32)OSIRIS_VA_IDREG,
  85           .pfn          = __phys_to_pfn(OSIRIS_PA_IDREG),
  86           .length       = SZ_16K,
  87           .type         = MT_DEVICE,
  88   },
  89 };
  90
  91 #define UCON S3C2410_UCON_DEFAULT | S3C2410_UCON_UCLK
  92 #define ULCON S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB
  93 #define UFCON S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE
  94
  95 static struct s3c24xx_uart_clksrc osiris_serial_clocks[] = {
  96         [0] = {
  97                 .name           = "uclk",
  98                 .divisor        = 1,
  99                 .min_baud       = 0,
 100                 .max_baud       = 0,
 101         },
 102         [1] = {
 103                 .name           = "pclk",
 104                 .divisor        = 1,
 105                 .min_baud       = 0,
 106                 .max_baud       = 0,
 107         }
 108 };
 109
 110 static struct s3c2410_uartcfg osiris_uartcfgs[] __initdata = {
 111         [0] = {
 112                 .hwport      = 0,
 113                 .flags       = 0,
 114                 .ucon        = UCON,
 115                 .ulcon       = ULCON,
 116                 .ufcon       = UFCON,
 117                 .clocks      = osiris_serial_clocks,
 118                 .clocks_size = ARRAY_SIZE(osiris_serial_clocks),
 119         },
 120         [1] = {
 121                 .hwport      = 1,
 122                 .flags       = 0,
 123                 .ucon        = UCON,
 124                 .ulcon       = ULCON,
 125                 .ufcon       = UFCON,
 126                 .clocks      = osiris_serial_clocks,
 127                 .clocks_size = ARRAY_SIZE(osiris_serial_clocks),
 128         },
 129         [2] = {
 130                 .hwport      = 2,
 131                 .flags       = 0,
 132                 .ucon        = UCON,
 133                 .ulcon       = ULCON,
 134                 .ufcon       = UFCON,
 135                 .clocks      = osiris_serial_clocks,
 136                 .clocks_size = ARRAY_SIZE(osiris_serial_clocks),
 137         }
 138 };
 139
 140 /* NAND Flash on Osiris board */
 141
 142 static int external_map[]   = { 2 };
 143 static int chip0_map[]      = { 0 };
 144 static int chip1_map[]      = { 1 };
 145
 146 static struct mtd_partition osiris_default_nand_part[] = {
 147         [0] = {
 148                 .name   = "Boot Agent",
 149                 .size   = SZ_16K,
 150                 .offset = 0,
 151         },
 152         [1] = {
 153                 .name   = "/boot",
 154                 .size   = SZ_4M - SZ_16K,
 155                 .offset = SZ_16K,
 156         },
 157         [2] = {
 158                 .name   = "user1",
 159                 .offset = SZ_4M,
 160                 .size   = SZ_32M - SZ_4M,
 161         },
 162         [3] = {
 163                 .name   = "user2",
 164                 .offset = SZ_32M,
 165                 .size   = MTDPART_SIZ_FULL,
 166         }
 167 };
 168
 169 static struct mtd_partition osiris_default_nand_part_large[] = {
 170         [0] = {
 171                 .name   = "Boot Agent",
 172                 .size   = SZ_128K,
 173                 .offset = 0,
 174         },
 175         [1] = {
 176                 .name   = "/boot",
 177                 .size   = SZ_4M - SZ_128K,
 178                 .offset = SZ_128K,
 179         },
 180         [2] = {
 181                 .name   = "user1",
 182                 .offset = SZ_4M,
 183                 .size   = SZ_32M - SZ_4M,
 184         },
 185         [3] = {
 186                 .name   = "user2",
 187                 .offset = SZ_32M,
 188                 .size   = MTDPART_SIZ_FULL,
 189         }
 190 };
 191
 192 /* the Osiris has 3 selectable slots for nand-flash, the two
 193  * on-board chip areas, as well as the external slot.
 194  *
 195  * Note, there is no current hot-plug support for the External
 196  * socket.
 197 */
 198
 199 static struct s3c2410_nand_set osiris_nand_sets[] = {
 200         [1] = {
 201                 .name           = "External",
 202                 .nr_chips       = 1,
 203                 .nr_map         = external_map,
 204                 .nr_partitions  = ARRAY_SIZE(osiris_default_nand_part),
 205                 .partitions     = osiris_default_nand_part,
 206         },
 207         [0] = {
 208                 .name           = "chip0",
 209                 .nr_chips       = 1,
 210                 .nr_map         = chip0_map,
 211                 .nr_partitions  = ARRAY_SIZE(osiris_default_nand_part),
 212                 .partitions     = osiris_default_nand_part,
 213         },
 214         [2] = {
 215                 .name           = "chip1",
 216                 .nr_chips       = 1,
 217                 .nr_map         = chip1_map,
 218                 .nr_partitions  = ARRAY_SIZE(osiris_default_nand_part),
 219                 .partitions     = osiris_default_nand_part,
 220         },
 221 };
 222
 223 static void osiris_nand_select(struct s3c2410_nand_set *set, int slot)
 224 {
 225         unsigned int tmp;
 226
 227         slot = set->nr_map[slot] & 3;
 228
 229         pr_debug("osiris_nand: selecting slot %d (set %p,%p)\n",
 230                  slot, set, set->nr_map);
 231
 232         tmp = __raw_readb(OSIRIS_VA_CTRL0);
 233         tmp &= ~OSIRIS_CTRL0_NANDSEL;
 234         tmp |= slot;
 235
 236         pr_debug("osiris_nand: ctrl0 now %02x\n", tmp);
 237
 238         __raw_writeb(tmp, OSIRIS_VA_CTRL0);
 239 }
 240
 241 static struct s3c2410_platform_nand osiris_nand_info = {
 242         .tacls          = 25,
 243         .twrph0         = 60,
 244         .twrph1         = 60,
 245         .nr_sets        = ARRAY_SIZE(osiris_nand_sets),
 246         .sets           = osiris_nand_sets,
 247         .select_chip    = osiris_nand_select,
 248 };
 249
 250 /* PCMCIA control and configuration */
 251
 252 static struct resource osiris_pcmcia_resource[] = {
 253         [0] = {
 254                 .start  = 0x0f000000,
 255                 .end    = 0x0f100000,
 256                 .flags  = IORESOURCE_MEM,
 257         },
 258         [1] = {
 259                 .start  = 0x0c000000,
 260                 .end    = 0x0c100000,
 261                 .flags  = IORESOURCE_MEM,
 262         }
 263 };
 264
 265 static struct platform_device osiris_pcmcia = {
 266         .name           = "osiris-pcmcia",
 267         .id             = -1,
 268         .num_resources  = ARRAY_SIZE(osiris_pcmcia_resource),
 269         .resource       = osiris_pcmcia_resource,
 270 };
 271
 272 /* Osiris power management device */
 273
 274 #ifdef CONFIG_PM
 275 static unsigned char pm_osiris_ctrl0;
 276
 277 static int osiris_pm_suspend(struct sys_device *sd, pm_message_t state)
 278 {
 279         unsigned int tmp;
 280
 281         pm_osiris_ctrl0 = __raw_readb(OSIRIS_VA_CTRL0);
 282         tmp = pm_osiris_ctrl0 & ~OSIRIS_CTRL0_NANDSEL;
 283
 284         /* ensure correct NAND slot is selected on resume */
 285         if ((pm_osiris_ctrl0 & OSIRIS_CTRL0_BOOT_INT) == 0)
 286                 tmp |= 2;
 287
 288         __raw_writeb(tmp, OSIRIS_VA_CTRL0);
 289
 290         /* ensure that an nRESET is not generated on resume. */
 291         s3c2410_gpio_setpin(S3C2410_GPA21, 1);
 292         s3c2410_gpio_cfgpin(S3C2410_GPA21, S3C2410_GPA21_OUT);
 293
 294         return 0;
 295 }
 296
 297 static int osiris_pm_resume(struct sys_device *sd)
 298 {
 299         if (pm_osiris_ctrl0 & OSIRIS_CTRL0_FIX8)
 300                 __raw_writeb(OSIRIS_CTRL1_FIX8, OSIRIS_VA_CTRL1);
 301
 302         __raw_writeb(pm_osiris_ctrl0, OSIRIS_VA_CTRL0);
 303
 304         s3c2410_gpio_cfgpin(S3C2410_GPA21, S3C2410_GPA21_nRSTOUT);
 305
 306         return 0;
 307 }
 308
 309 #else
 310 #define osiris_pm_suspend NULL
 311 #define osiris_pm_resume NULL
 312 #endif
 313
 314 static struct sysdev_class osiris_pm_sysclass = {
 315         .name           = "mach-osiris",
 316         .suspend        = osiris_pm_suspend,
 317         .resume         = osiris_pm_resume,
 318 };
 319
 320 static struct sys_device osiris_pm_sysdev = {
 321         .cls            = &osiris_pm_sysclass,
 322 };
 323
 324 /* Standard Osiris devices */
 325
 326 static struct platform_device *osiris_devices[] __initdata = {
 327         &s3c_device_i2c,
 328         &s3c_device_wdt,
 329         &s3c_device_nand,
 330         &osiris_pcmcia,
 331 };
 332
 333 static struct clk *osiris_clocks[] = {
 334         &s3c24xx_dclk0,
 335         &s3c24xx_dclk1,
 336         &s3c24xx_clkout0,
 337         &s3c24xx_clkout1,
 338         &s3c24xx_uclk,
 339 };
 340
 341 static void __init osiris_map_io(void)
 342 {
 343         unsigned long flags;
 344
 345         /* initialise the clocks */
 346
 347         s3c24xx_dclk0.parent = NULL;
 348         s3c24xx_dclk0.rate   = 12*1000*1000;
 349
 350         s3c24xx_dclk1.parent = NULL;
 351         s3c24xx_dclk1.rate   = 24*1000*1000;
 352
 353         s3c24xx_clkout0.parent  = &s3c24xx_dclk0;
 354         s3c24xx_clkout1.parent  = &s3c24xx_dclk1;
 355
 356         s3c24xx_uclk.parent  = &s3c24xx_clkout1;
 357
 358         s3c24xx_register_clocks(osiris_clocks, ARRAY_SIZE(osiris_clocks));
 359
 360         s3c_device_nand.dev.platform_data = &osiris_nand_info;
 361
 362         s3c24xx_init_io(osiris_iodesc, ARRAY_SIZE(osiris_iodesc));
 363         s3c24xx_init_clocks(0);
 364         s3c24xx_init_uarts(osiris_uartcfgs, ARRAY_SIZE(osiris_uartcfgs));
 365
 366         /* check for the newer revision boards with large page nand */
 367
 368         if ((__raw_readb(OSIRIS_VA_IDREG) & OSIRIS_ID_REVMASK) >= 4) {
 369                 printk(KERN_INFO "OSIRIS-B detected (revision %d)\n",
 370                        __raw_readb(OSIRIS_VA_IDREG) & OSIRIS_ID_REVMASK);
 371                 osiris_nand_sets[0].partitions = osiris_default_nand_part_large;
 372                 osiris_nand_sets[0].nr_partitions = ARRAY_SIZE(osiris_default_nand_part_large);
 373         } else {
 374                 /* write-protect line to the NAND */
 375                 s3c2410_gpio_setpin(S3C2410_GPA0, 1);
 376         }
 377
 378         /* fix bus configuration (nBE settings wrong on ABLE pre v2.20) */
 379
 380         local_irq_save(flags);
 381         __raw_writel(__raw_readl(S3C2410_BWSCON) | S3C2410_BWSCON_ST1 | S3C2410_BWSCON_ST2 | S3C2410_BWSCON_ST3 | S3C2410_BWSCON_ST4 | S3C2410_BWSCON_ST5, S3C2410_BWSCON);
 382         local_irq_restore(flags);
 383 }
 384
 385 static void __init osiris_init(void)
 386 {
 387         sysdev_class_register(&osiris_pm_sysclass);
 388         sysdev_register(&osiris_pm_sysdev);
 389
 390         platform_add_devices(osiris_devices, ARRAY_SIZE(osiris_devices));
 391 };
 392
 393 MACHINE_START(OSIRIS, "Simtec-OSIRIS")
 394         /* Maintainer: Ben Dooks <ben@simtec.co.uk> */
 395         .phys_io        = S3C2410_PA_UART,
 396         .io_pg_offst    = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
 397         .boot_params    = S3C2410_SDRAM_PA + 0x100,
 398         .map_io         = osiris_map_io,
 399         .init_machine   = osiris_init,
 400         .init_irq       = s3c24xx_init_irq,
 401         .init_machine   = osiris_init,
 402         .timer          = &s3c24xx_timer,
 403 MACHINE_END