arch/arm/mach-versatile/core.c

   1 /*
   2  *  linux/arch/arm/mach-versatile/core.c
   3  *
   4  *  Copyright (C) 1999 - 2003 ARM Limited
   5  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   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
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21 #include <linux/init.h>
  22 #include <linux/device.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/sysdev.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/amba/bus.h>
  28 #include <linux/amba/clcd.h>
  29 #include <linux/clocksource.h>
  30 #include <linux/clockchips.h>
  31
  32 #include <asm/cnt32_to_63.h>
  33 #include <asm/system.h>
  34 #include <asm/hardware.h>
  35 #include <asm/io.h>
  36 #include <asm/irq.h>
  37 #include <asm/leds.h>
  38 #include <asm/hardware/arm_timer.h>
  39 #include <asm/hardware/icst307.h>
  40 #include <asm/hardware/vic.h>
  41 #include <asm/mach-types.h>
  42
  43 #include <asm/mach/arch.h>
  44 #include <asm/mach/flash.h>
  45 #include <asm/mach/irq.h>
  46 #include <asm/mach/time.h>
  47 #include <asm/mach/map.h>
  48 #include <asm/mach/mmc.h>
  49
  50 #include "core.h"
  51 #include "clock.h"
  52
  53 /*
  54  * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
  55  * is the (PA >> 12).
  56  *
  57  * Setup a VA for the Versatile Vectored Interrupt Controller.
  58  */
  59 #define __io_address(n)         __io(IO_ADDRESS(n))
  60 #define VA_VIC_BASE             __io_address(VERSATILE_VIC_BASE)
  61 #define VA_SIC_BASE             __io_address(VERSATILE_SIC_BASE)
  62
  63 static void sic_mask_irq(unsigned int irq)
  64 {
  65         irq -= IRQ_SIC_START;
  66         writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
  67 }
  68
  69 static void sic_unmask_irq(unsigned int irq)
  70 {
  71         irq -= IRQ_SIC_START;
  72         writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_SET);
  73 }
  74
  75 static struct irq_chip sic_chip = {
  76         .name   = "SIC",
  77         .ack    = sic_mask_irq,
  78         .mask   = sic_mask_irq,
  79         .unmask = sic_unmask_irq,
  80 };
  81
  82 static void
  83 sic_handle_irq(unsigned int irq, struct irq_desc *desc)
  84 {
  85         unsigned long status = readl(VA_SIC_BASE + SIC_IRQ_STATUS);
  86
  87         if (status == 0) {
  88                 do_bad_IRQ(irq, desc);
  89                 return;
  90         }
  91
  92         do {
  93                 irq = ffs(status) - 1;
  94                 status &= ~(1 << irq);
  95
  96                 irq += IRQ_SIC_START;
  97
  98                 desc = irq_desc + irq;
  99                 desc_handle_irq(irq, desc);
 100         } while (status);
 101 }
 102
 103 #if 1
 104 #define IRQ_MMCI0A      IRQ_VICSOURCE22
 105 #define IRQ_AACI        IRQ_VICSOURCE24
 106 #define IRQ_ETH         IRQ_VICSOURCE25
 107 #define PIC_MASK        0xFFD00000
 108 #else
 109 #define IRQ_MMCI0A      IRQ_SIC_MMCI0A
 110 #define IRQ_AACI        IRQ_SIC_AACI
 111 #define IRQ_ETH         IRQ_SIC_ETH
 112 #define PIC_MASK        0
 113 #endif
 114
 115 void __init versatile_init_irq(void)
 116 {
 117         unsigned int i;
 118
 119         vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0);
 120
 121         set_irq_chained_handler(IRQ_VICSOURCE31, sic_handle_irq);
 122
 123         /* Do second interrupt controller */
 124         writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
 125
 126         for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
 127                 if ((PIC_MASK & (1 << (i - IRQ_SIC_START))) == 0) {
 128                         set_irq_chip(i, &sic_chip);
 129                         set_irq_handler(i, handle_level_irq);
 130                         set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
 131                 }
 132         }
 133
 134         /*
 135          * Interrupts on secondary controller from 0 to 8 are routed to
 136          * source 31 on PIC.
 137          * Interrupts from 21 to 31 are routed directly to the VIC on
 138          * the corresponding number on primary controller. This is controlled
 139          * by setting PIC_ENABLEx.
 140          */
 141         writel(PIC_MASK, VA_SIC_BASE + SIC_INT_PIC_ENABLE);
 142 }
 143
 144 static struct map_desc versatile_io_desc[] __initdata = {
 145         {
 146                 .virtual        =  IO_ADDRESS(VERSATILE_SYS_BASE),
 147                 .pfn            = __phys_to_pfn(VERSATILE_SYS_BASE),
 148                 .length         = SZ_4K,
 149                 .type           = MT_DEVICE
 150         }, {
 151                 .virtual        =  IO_ADDRESS(VERSATILE_SIC_BASE),
 152                 .pfn            = __phys_to_pfn(VERSATILE_SIC_BASE),
 153                 .length         = SZ_4K,
 154                 .type           = MT_DEVICE
 155         }, {
 156                 .virtual        =  IO_ADDRESS(VERSATILE_VIC_BASE),
 157                 .pfn            = __phys_to_pfn(VERSATILE_VIC_BASE),
 158                 .length         = SZ_4K,
 159                 .type           = MT_DEVICE
 160         }, {
 161                 .virtual        =  IO_ADDRESS(VERSATILE_SCTL_BASE),
 162                 .pfn            = __phys_to_pfn(VERSATILE_SCTL_BASE),
 163                 .length         = SZ_4K * 9,
 164                 .type           = MT_DEVICE
 165         },
 166 #ifdef CONFIG_MACH_VERSATILE_AB
 167         {
 168                 .virtual        =  IO_ADDRESS(VERSATILE_GPIO0_BASE),
 169                 .pfn            = __phys_to_pfn(VERSATILE_GPIO0_BASE),
 170                 .length         = SZ_4K,
 171                 .type           = MT_DEVICE
 172         }, {
 173                 .virtual        =  IO_ADDRESS(VERSATILE_IB2_BASE),
 174                 .pfn            = __phys_to_pfn(VERSATILE_IB2_BASE),
 175                 .length         = SZ_64M,
 176                 .type           = MT_DEVICE
 177         },
 178 #endif
 179 #ifdef CONFIG_DEBUG_LL
 180         {
 181                 .virtual        =  IO_ADDRESS(VERSATILE_UART0_BASE),
 182                 .pfn            = __phys_to_pfn(VERSATILE_UART0_BASE),
 183                 .length         = SZ_4K,
 184                 .type           = MT_DEVICE
 185         },
 186 #endif
 187 #ifdef CONFIG_PCI
 188         {
 189                 .virtual        =  IO_ADDRESS(VERSATILE_PCI_CORE_BASE),
 190                 .pfn            = __phys_to_pfn(VERSATILE_PCI_CORE_BASE),
 191                 .length         = SZ_4K,
 192                 .type           = MT_DEVICE
 193         }, {
 194                 .virtual        =  (unsigned long)VERSATILE_PCI_VIRT_BASE,
 195                 .pfn            = __phys_to_pfn(VERSATILE_PCI_BASE),
 196                 .length         = VERSATILE_PCI_BASE_SIZE,
 197                 .type           = MT_DEVICE
 198         }, {
 199                 .virtual        =  (unsigned long)VERSATILE_PCI_CFG_VIRT_BASE,
 200                 .pfn            = __phys_to_pfn(VERSATILE_PCI_CFG_BASE),
 201                 .length         = VERSATILE_PCI_CFG_BASE_SIZE,
 202                 .type           = MT_DEVICE
 203         },
 204 #if 0
 205         {
 206                 .virtual        =  VERSATILE_PCI_VIRT_MEM_BASE0,
 207                 .pfn            = __phys_to_pfn(VERSATILE_PCI_MEM_BASE0),
 208                 .length         = SZ_16M,
 209                 .type           = MT_DEVICE
 210         }, {
 211                 .virtual        =  VERSATILE_PCI_VIRT_MEM_BASE1,
 212                 .pfn            = __phys_to_pfn(VERSATILE_PCI_MEM_BASE1),
 213                 .length         = SZ_16M,
 214                 .type           = MT_DEVICE
 215         }, {
 216                 .virtual        =  VERSATILE_PCI_VIRT_MEM_BASE2,
 217                 .pfn            = __phys_to_pfn(VERSATILE_PCI_MEM_BASE2),
 218                 .length         = SZ_16M,
 219                 .type           = MT_DEVICE
 220         },
 221 #endif
 222 #endif
 223 };
 224
 225 void __init versatile_map_io(void)
 226 {
 227         iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
 228 }
 229
 230 #define VERSATILE_REFCOUNTER    (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET)
 231
 232 /*
 233  * This is the Versatile sched_clock implementation.  This has
 234  * a resolution of 41.7ns, and a maximum value of about 35583 days.
 235  *
 236  * The return value is guaranteed to be monotonic in that range as
 237  * long as there is always less than 89 seconds between successive
 238  * calls to this function.
 239  */
 240 unsigned long long sched_clock(void)
 241 {
 242         unsigned long long v = cnt32_to_63(readl(VERSATILE_REFCOUNTER));
 243
 244         /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */
 245         v *= 125<<1;
 246         do_div(v, 3<<1);
 247
 248         return v;
 249 }
 250
 251
 252 #define VERSATILE_FLASHCTRL    (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET)
 253
 254 static int versatile_flash_init(void)
 255 {
 256         u32 val;
 257
 258         val = __raw_readl(VERSATILE_FLASHCTRL);
 259         val &= ~VERSATILE_FLASHPROG_FLVPPEN;
 260         __raw_writel(val, VERSATILE_FLASHCTRL);
 261
 262         return 0;
 263 }
 264
 265 static void versatile_flash_exit(void)
 266 {
 267         u32 val;
 268
 269         val = __raw_readl(VERSATILE_FLASHCTRL);
 270         val &= ~VERSATILE_FLASHPROG_FLVPPEN;
 271         __raw_writel(val, VERSATILE_FLASHCTRL);
 272 }
 273
 274 static void versatile_flash_set_vpp(int on)
 275 {
 276         u32 val;
 277
 278         val = __raw_readl(VERSATILE_FLASHCTRL);
 279         if (on)
 280                 val |= VERSATILE_FLASHPROG_FLVPPEN;
 281         else
 282                 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
 283         __raw_writel(val, VERSATILE_FLASHCTRL);
 284 }
 285
 286 static struct flash_platform_data versatile_flash_data = {
 287         .map_name               = "cfi_probe",
 288         .width                  = 4,
 289         .init                   = versatile_flash_init,
 290         .exit                   = versatile_flash_exit,
 291         .set_vpp                = versatile_flash_set_vpp,
 292 };
 293
 294 static struct resource versatile_flash_resource = {
 295         .start                  = VERSATILE_FLASH_BASE,
 296         .end                    = VERSATILE_FLASH_BASE + VERSATILE_FLASH_SIZE - 1,
 297         .flags                  = IORESOURCE_MEM,
 298 };
 299
 300 static struct platform_device versatile_flash_device = {
 301         .name                   = "armflash",
 302         .id                     = 0,
 303         .dev                    = {
 304                 .platform_data  = &versatile_flash_data,
 305         },
 306         .num_resources          = 1,
 307         .resource               = &versatile_flash_resource,
 308 };
 309
 310 static struct resource smc91x_resources[] = {
 311         [0] = {
 312                 .start          = VERSATILE_ETH_BASE,
 313                 .end            = VERSATILE_ETH_BASE + SZ_64K - 1,
 314                 .flags          = IORESOURCE_MEM,
 315         },
 316         [1] = {
 317                 .start          = IRQ_ETH,
 318                 .end            = IRQ_ETH,
 319                 .flags          = IORESOURCE_IRQ,
 320         },
 321 };
 322
 323 static struct platform_device smc91x_device = {
 324         .name           = "smc91x",
 325         .id             = 0,
 326         .num_resources  = ARRAY_SIZE(smc91x_resources),
 327         .resource       = smc91x_resources,
 328 };
 329
 330 static struct resource versatile_i2c_resource = {
 331         .start                  = VERSATILE_I2C_BASE,
 332         .end                    = VERSATILE_I2C_BASE + SZ_4K - 1,
 333         .flags                  = IORESOURCE_MEM,
 334 };
 335
 336 static struct platform_device versatile_i2c_device = {
 337         .name                   = "versatile-i2c",
 338         .id                     = -1,
 339         .num_resources          = 1,
 340         .resource               = &versatile_i2c_resource,
 341 };
 342
 343 #define VERSATILE_SYSMCI        (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET)
 344
 345 unsigned int mmc_status(struct device *dev)
 346 {
 347         struct amba_device *adev = container_of(dev, struct amba_device, dev);
 348         u32 mask;
 349
 350         if (adev->res.start == VERSATILE_MMCI0_BASE)
 351                 mask = 1;
 352         else
 353                 mask = 2;
 354
 355         return readl(VERSATILE_SYSMCI) & mask;
 356 }
 357
 358 static struct mmc_platform_data mmc0_plat_data = {
 359         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 360         .status         = mmc_status,
 361 };
 362
 363 /*
 364  * Clock handling
 365  */
 366 static const struct icst307_params versatile_oscvco_params = {
 367         .ref            = 24000,
 368         .vco_max        = 200000,
 369         .vd_min         = 4 + 8,
 370         .vd_max         = 511 + 8,
 371         .rd_min         = 1 + 2,
 372         .rd_max         = 127 + 2,
 373 };
 374
 375 static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
 376 {
 377         void __iomem *sys_lock = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LOCK_OFFSET;
 378         void __iomem *sys_osc = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_OSCCLCD_OFFSET;
 379         u32 val;
 380
 381         val = readl(sys_osc) & ~0x7ffff;
 382         val |= vco.v | (vco.r << 9) | (vco.s << 16);
 383
 384         writel(0xa05f, sys_lock);
 385         writel(val, sys_osc);
 386         writel(0, sys_lock);
 387 }
 388
 389 static struct clk versatile_clcd_clk = {
 390         .name   = "CLCDCLK",
 391         .params = &versatile_oscvco_params,
 392         .setvco = versatile_oscvco_set,
 393 };
 394
 395 /*
 396  * CLCD support.
 397  */
 398 #define SYS_CLCD_MODE_MASK      (3 << 0)
 399 #define SYS_CLCD_MODE_888       (0 << 0)
 400 #define SYS_CLCD_MODE_5551      (1 << 0)
 401 #define SYS_CLCD_MODE_565_RLSB  (2 << 0)
 402 #define SYS_CLCD_MODE_565_BLSB  (3 << 0)
 403 #define SYS_CLCD_NLCDIOON       (1 << 2)
 404 #define SYS_CLCD_VDDPOSSWITCH   (1 << 3)
 405 #define SYS_CLCD_PWR3V5SWITCH   (1 << 4)
 406 #define SYS_CLCD_ID_MASK        (0x1f << 8)
 407 #define SYS_CLCD_ID_SANYO_3_8   (0x00 << 8)
 408 #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
 409 #define SYS_CLCD_ID_EPSON_2_2   (0x02 << 8)
 410 #define SYS_CLCD_ID_SANYO_2_5   (0x07 << 8)
 411 #define SYS_CLCD_ID_VGA         (0x1f << 8)
 412
 413 static struct clcd_panel vga = {
 414         .mode           = {
 415                 .name           = "VGA",
 416                 .refresh        = 60,
 417                 .xres           = 640,
 418                 .yres           = 480,
 419                 .pixclock       = 39721,
 420                 .left_margin    = 40,
 421                 .right_margin   = 24,
 422                 .upper_margin   = 32,
 423                 .lower_margin   = 11,
 424                 .hsync_len      = 96,
 425                 .vsync_len      = 2,
 426                 .sync           = 0,
 427                 .vmode          = FB_VMODE_NONINTERLACED,
 428         },
 429         .width          = -1,
 430         .height         = -1,
 431         .tim2           = TIM2_BCD | TIM2_IPC,
 432         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 433         .bpp            = 16,
 434 };
 435
 436 static struct clcd_panel sanyo_3_8_in = {
 437         .mode           = {
 438                 .name           = "Sanyo QVGA",
 439                 .refresh        = 116,
 440                 .xres           = 320,
 441                 .yres           = 240,
 442                 .pixclock       = 100000,
 443                 .left_margin    = 6,
 444                 .right_margin   = 6,
 445                 .upper_margin   = 5,
 446                 .lower_margin   = 5,
 447                 .hsync_len      = 6,
 448                 .vsync_len      = 6,
 449                 .sync           = 0,
 450                 .vmode          = FB_VMODE_NONINTERLACED,
 451         },
 452         .width          = -1,
 453         .height         = -1,
 454         .tim2           = TIM2_BCD,
 455         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 456         .bpp            = 16,
 457 };
 458
 459 static struct clcd_panel sanyo_2_5_in = {
 460         .mode           = {
 461                 .name           = "Sanyo QVGA Portrait",
 462                 .refresh        = 116,
 463                 .xres           = 240,
 464                 .yres           = 320,
 465                 .pixclock       = 100000,
 466                 .left_margin    = 20,
 467                 .right_margin   = 10,
 468                 .upper_margin   = 2,
 469                 .lower_margin   = 2,
 470                 .hsync_len      = 10,
 471                 .vsync_len      = 2,
 472                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 473                 .vmode          = FB_VMODE_NONINTERLACED,
 474         },
 475         .width          = -1,
 476         .height         = -1,
 477         .tim2           = TIM2_IVS | TIM2_IHS | TIM2_IPC,
 478         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 479         .bpp            = 16,
 480 };
 481
 482 static struct clcd_panel epson_2_2_in = {
 483         .mode           = {
 484                 .name           = "Epson QCIF",
 485                 .refresh        = 390,
 486                 .xres           = 176,
 487                 .yres           = 220,
 488                 .pixclock       = 62500,
 489                 .left_margin    = 3,
 490                 .right_margin   = 2,
 491                 .upper_margin   = 1,
 492                 .lower_margin   = 0,
 493                 .hsync_len      = 3,
 494                 .vsync_len      = 2,
 495                 .sync           = 0,
 496                 .vmode          = FB_VMODE_NONINTERLACED,
 497         },
 498         .width          = -1,
 499         .height         = -1,
 500         .tim2           = TIM2_BCD | TIM2_IPC,
 501         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 502         .bpp            = 16,
 503 };
 504
 505 /*
 506  * Detect which LCD panel is connected, and return the appropriate
 507  * clcd_panel structure.  Note: we do not have any information on
 508  * the required timings for the 8.4in panel, so we presently assume
 509  * VGA timings.
 510  */
 511 static struct clcd_panel *versatile_clcd_panel(void)
 512 {
 513         void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
 514         struct clcd_panel *panel = &vga;
 515         u32 val;
 516
 517         val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
 518         if (val == SYS_CLCD_ID_SANYO_3_8)
 519                 panel = &sanyo_3_8_in;
 520         else if (val == SYS_CLCD_ID_SANYO_2_5)
 521                 panel = &sanyo_2_5_in;
 522         else if (val == SYS_CLCD_ID_EPSON_2_2)
 523                 panel = &epson_2_2_in;
 524         else if (val == SYS_CLCD_ID_VGA)
 525                 panel = &vga;
 526         else {
 527                 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
 528                         val);
 529                 panel = &vga;
 530         }
 531
 532         return panel;
 533 }
 534
 535 /*
 536  * Disable all display connectors on the interface module.
 537  */
 538 static void versatile_clcd_disable(struct clcd_fb *fb)
 539 {
 540         void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
 541         u32 val;
 542
 543         val = readl(sys_clcd);
 544         val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
 545         writel(val, sys_clcd);
 546
 547 #ifdef CONFIG_MACH_VERSATILE_AB
 548         /*
 549          * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
 550          */
 551         if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
 552                 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
 553                 unsigned long ctrl;
 554
 555                 ctrl = readl(versatile_ib2_ctrl);
 556                 ctrl &= ~0x01;
 557                 writel(ctrl, versatile_ib2_ctrl);
 558         }
 559 #endif
 560 }
 561
 562 /*
 563  * Enable the relevant connector on the interface module.
 564  */
 565 static void versatile_clcd_enable(struct clcd_fb *fb)
 566 {
 567         void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
 568         u32 val;
 569
 570         val = readl(sys_clcd);
 571         val &= ~SYS_CLCD_MODE_MASK;
 572
 573         switch (fb->fb.var.green.length) {
 574         case 5:
 575                 val |= SYS_CLCD_MODE_5551;
 576                 break;
 577         case 6:
 578                 val |= SYS_CLCD_MODE_565_RLSB;
 579                 break;
 580         case 8:
 581                 val |= SYS_CLCD_MODE_888;
 582                 break;
 583         }
 584
 585         /*
 586          * Set the MUX
 587          */
 588         writel(val, sys_clcd);
 589
 590         /*
 591          * And now enable the PSUs
 592          */
 593         val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
 594         writel(val, sys_clcd);
 595
 596 #ifdef CONFIG_MACH_VERSATILE_AB
 597         /*
 598          * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
 599          */
 600         if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
 601                 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
 602                 unsigned long ctrl;
 603
 604                 ctrl = readl(versatile_ib2_ctrl);
 605                 ctrl |= 0x01;
 606                 writel(ctrl, versatile_ib2_ctrl);
 607         }
 608 #endif
 609 }
 610
 611 static unsigned long framesize = SZ_1M;
 612
 613 static int versatile_clcd_setup(struct clcd_fb *fb)
 614 {
 615         dma_addr_t dma;
 616
 617         fb->panel               = versatile_clcd_panel();
 618
 619         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
 620                                                     &dma, GFP_KERNEL);
 621         if (!fb->fb.screen_base) {
 622                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
 623                 return -ENOMEM;
 624         }
 625
 626         fb->fb.fix.smem_start   = dma;
 627         fb->fb.fix.smem_len     = framesize;
 628
 629         return 0;
 630 }
 631
 632 static int versatile_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 633 {
 634         return dma_mmap_writecombine(&fb->dev->dev, vma,
 635                                      fb->fb.screen_base,
 636                                      fb->fb.fix.smem_start,
 637                                      fb->fb.fix.smem_len);
 638 }
 639
 640 static void versatile_clcd_remove(struct clcd_fb *fb)
 641 {
 642         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 643                               fb->fb.screen_base, fb->fb.fix.smem_start);
 644 }
 645
 646 static struct clcd_board clcd_plat_data = {
 647         .name           = "Versatile",
 648         .check          = clcdfb_check,
 649         .decode         = clcdfb_decode,
 650         .disable        = versatile_clcd_disable,
 651         .enable         = versatile_clcd_enable,
 652         .setup          = versatile_clcd_setup,
 653         .mmap           = versatile_clcd_mmap,
 654         .remove         = versatile_clcd_remove,
 655 };
 656
 657 #define AACI_IRQ        { IRQ_AACI, NO_IRQ }
 658 #define AACI_DMA        { 0x80, 0x81 }
 659 #define MMCI0_IRQ       { IRQ_MMCI0A,IRQ_SIC_MMCI0B }
 660 #define MMCI0_DMA       { 0x84, 0 }
 661 #define KMI0_IRQ        { IRQ_SIC_KMI0, NO_IRQ }
 662 #define KMI0_DMA        { 0, 0 }
 663 #define KMI1_IRQ        { IRQ_SIC_KMI1, NO_IRQ }
 664 #define KMI1_DMA        { 0, 0 }
 665
 666 /*
 667  * These devices are connected directly to the multi-layer AHB switch
 668  */
 669 #define SMC_IRQ         { NO_IRQ, NO_IRQ }
 670 #define SMC_DMA         { 0, 0 }
 671 #define MPMC_IRQ        { NO_IRQ, NO_IRQ }
 672 #define MPMC_DMA        { 0, 0 }
 673 #define CLCD_IRQ        { IRQ_CLCDINT, NO_IRQ }
 674 #define CLCD_DMA        { 0, 0 }
 675 #define DMAC_IRQ        { IRQ_DMAINT, NO_IRQ }
 676 #define DMAC_DMA        { 0, 0 }
 677
 678 /*
 679  * These devices are connected via the core APB bridge
 680  */
 681 #define SCTL_IRQ        { NO_IRQ, NO_IRQ }
 682 #define SCTL_DMA        { 0, 0 }
 683 #define WATCHDOG_IRQ    { IRQ_WDOGINT, NO_IRQ }
 684 #define WATCHDOG_DMA    { 0, 0 }
 685 #define GPIO0_IRQ       { IRQ_GPIOINT0, NO_IRQ }
 686 #define GPIO0_DMA       { 0, 0 }
 687 #define GPIO1_IRQ       { IRQ_GPIOINT1, NO_IRQ }
 688 #define GPIO1_DMA       { 0, 0 }
 689 #define RTC_IRQ         { IRQ_RTCINT, NO_IRQ }
 690 #define RTC_DMA         { 0, 0 }
 691
 692 /*
 693  * These devices are connected via the DMA APB bridge
 694  */
 695 #define SCI_IRQ         { IRQ_SCIINT, NO_IRQ }
 696 #define SCI_DMA         { 7, 6 }
 697 #define UART0_IRQ       { IRQ_UARTINT0, NO_IRQ }
 698 #define UART0_DMA       { 15, 14 }
 699 #define UART1_IRQ       { IRQ_UARTINT1, NO_IRQ }
 700 #define UART1_DMA       { 13, 12 }
 701 #define UART2_IRQ       { IRQ_UARTINT2, NO_IRQ }
 702 #define UART2_DMA       { 11, 10 }
 703 #define SSP_IRQ         { IRQ_SSPINT, NO_IRQ }
 704 #define SSP_DMA         { 9, 8 }
 705
 706 /* FPGA Primecells */
 707 AMBA_DEVICE(aaci,  "fpga:04", AACI,     NULL);
 708 AMBA_DEVICE(mmc0,  "fpga:05", MMCI0,    &mmc0_plat_data);
 709 AMBA_DEVICE(kmi0,  "fpga:06", KMI0,     NULL);
 710 AMBA_DEVICE(kmi1,  "fpga:07", KMI1,     NULL);
 711
 712 /* DevChip Primecells */
 713 AMBA_DEVICE(smc,   "dev:00",  SMC,      NULL);
 714 AMBA_DEVICE(mpmc,  "dev:10",  MPMC,     NULL);
 715 AMBA_DEVICE(clcd,  "dev:20",  CLCD,     &clcd_plat_data);
 716 AMBA_DEVICE(dmac,  "dev:30",  DMAC,     NULL);
 717 AMBA_DEVICE(sctl,  "dev:e0",  SCTL,     NULL);
 718 AMBA_DEVICE(wdog,  "dev:e1",  WATCHDOG, NULL);
 719 AMBA_DEVICE(gpio0, "dev:e4",  GPIO0,    NULL);
 720 AMBA_DEVICE(gpio1, "dev:e5",  GPIO1,    NULL);
 721 AMBA_DEVICE(rtc,   "dev:e8",  RTC,      NULL);
 722 AMBA_DEVICE(sci0,  "dev:f0",  SCI,      NULL);
 723 AMBA_DEVICE(uart0, "dev:f1",  UART0,    NULL);
 724 AMBA_DEVICE(uart1, "dev:f2",  UART1,    NULL);
 725 AMBA_DEVICE(uart2, "dev:f3",  UART2,    NULL);
 726 AMBA_DEVICE(ssp0,  "dev:f4",  SSP,      NULL);
 727
 728 static struct amba_device *amba_devs[] __initdata = {
 729         &dmac_device,
 730         &uart0_device,
 731         &uart1_device,
 732         &uart2_device,
 733         &smc_device,
 734         &mpmc_device,
 735         &clcd_device,
 736         &sctl_device,
 737         &wdog_device,
 738         &gpio0_device,
 739         &gpio1_device,
 740         &rtc_device,
 741         &sci0_device,
 742         &ssp0_device,
 743         &aaci_device,
 744         &mmc0_device,
 745         &kmi0_device,
 746         &kmi1_device,
 747 };
 748
 749 #ifdef CONFIG_LEDS
 750 #define VA_LEDS_BASE (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET)
 751
 752 static void versatile_leds_event(led_event_t ledevt)
 753 {
 754         unsigned long flags;
 755         u32 val;
 756
 757         local_irq_save(flags);
 758         val = readl(VA_LEDS_BASE);
 759
 760         switch (ledevt) {
 761         case led_idle_start:
 762                 val = val & ~VERSATILE_SYS_LED0;
 763                 break;
 764
 765         case led_idle_end:
 766                 val = val | VERSATILE_SYS_LED0;
 767                 break;
 768
 769         case led_timer:
 770                 val = val ^ VERSATILE_SYS_LED1;
 771                 break;
 772
 773         case led_halted:
 774                 val = 0;
 775                 break;
 776
 777         default:
 778                 break;
 779         }
 780
 781         writel(val, VA_LEDS_BASE);
 782         local_irq_restore(flags);
 783 }
 784 #endif  /* CONFIG_LEDS */
 785
 786 void __init versatile_init(void)
 787 {
 788         int i;
 789
 790         clk_register(&versatile_clcd_clk);
 791
 792         platform_device_register(&versatile_flash_device);
 793         platform_device_register(&versatile_i2c_device);
 794         platform_device_register(&smc91x_device);
 795
 796         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 797                 struct amba_device *d = amba_devs[i];
 798                 amba_device_register(d, &iomem_resource);
 799         }
 800
 801 #ifdef CONFIG_LEDS
 802         leds_event = versatile_leds_event;
 803 #endif
 804 }
 805
 806 /*
 807  * Where is the timer (VA)?
 808  */
 809 #define TIMER0_VA_BASE           __io_address(VERSATILE_TIMER0_1_BASE)
 810 #define TIMER1_VA_BASE          (__io_address(VERSATILE_TIMER0_1_BASE) + 0x20)
 811 #define TIMER2_VA_BASE           __io_address(VERSATILE_TIMER2_3_BASE)
 812 #define TIMER3_VA_BASE          (__io_address(VERSATILE_TIMER2_3_BASE) + 0x20)
 813 #define VA_IC_BASE               __io_address(VERSATILE_VIC_BASE)
 814
 815 /*
 816  * How long is the timer interval?
 817  */
 818 #define TIMER_INTERVAL  (TICKS_PER_uSEC * mSEC_10)
 819 #if TIMER_INTERVAL >= 0x100000
 820 #define TIMER_RELOAD    (TIMER_INTERVAL >> 8)
 821 #define TIMER_DIVISOR   (TIMER_CTRL_DIV256)
 822 #define TICKS2USECS(x)  (256 * (x) / TICKS_PER_uSEC)
 823 #elif TIMER_INTERVAL >= 0x10000
 824 #define TIMER_RELOAD    (TIMER_INTERVAL >> 4)           /* Divide by 16 */
 825 #define TIMER_DIVISOR   (TIMER_CTRL_DIV16)
 826 #define TICKS2USECS(x)  (16 * (x) / TICKS_PER_uSEC)
 827 #else
 828 #define TIMER_RELOAD    (TIMER_INTERVAL)
 829 #define TIMER_DIVISOR   (TIMER_CTRL_DIV1)
 830 #define TICKS2USECS(x)  ((x) / TICKS_PER_uSEC)
 831 #endif
 832
 833 static void timer_set_mode(enum clock_event_mode mode,
 834                            struct clock_event_device *clk)
 835 {
 836         unsigned long ctrl;
 837
 838         switch(mode) {
 839         case CLOCK_EVT_MODE_PERIODIC:
 840                 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
 841
 842                 ctrl = TIMER_CTRL_PERIODIC;
 843                 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE;
 844                 break;
 845         case CLOCK_EVT_MODE_ONESHOT:
 846                 /* period set, and timer enabled in 'next_event' hook */
 847                 ctrl = TIMER_CTRL_ONESHOT;
 848                 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE;
 849                 break;
 850         case CLOCK_EVT_MODE_UNUSED:
 851         case CLOCK_EVT_MODE_SHUTDOWN:
 852         default:
 853                 ctrl = 0;
 854         }
 855
 856         writel(ctrl, TIMER0_VA_BASE + TIMER_CTRL);
 857 }
 858
 859 static int timer_set_next_event(unsigned long evt,
 860                                 struct clock_event_device *unused)
 861 {
 862         unsigned long ctrl = readl(TIMER0_VA_BASE + TIMER_CTRL);
 863
 864         writel(evt, TIMER0_VA_BASE + TIMER_LOAD);
 865         writel(ctrl | TIMER_CTRL_ENABLE, TIMER0_VA_BASE + TIMER_CTRL);
 866
 867         return 0;
 868 }
 869
 870 static struct clock_event_device timer0_clockevent =     {
 871         .name           = "timer0",
 872         .shift          = 32,
 873         .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 874         .set_mode       = timer_set_mode,
 875         .set_next_event = timer_set_next_event,
 876 };
 877
 878 /*
 879  * IRQ handler for the timer
 880  */
 881 static irqreturn_t versatile_timer_interrupt(int irq, void *dev_id)
 882 {
 883         struct clock_event_device *evt = &timer0_clockevent;
 884
 885         writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
 886
 887         evt->event_handler(evt);
 888
 889         return IRQ_HANDLED;
 890 }
 891
 892 static struct irqaction versatile_timer_irq = {
 893         .name           = "Versatile Timer Tick",
 894         .flags          = IRQF_DISABLED | IRQF_TIMER,
 895         .handler        = versatile_timer_interrupt,
 896 };
 897
 898 static cycle_t versatile_get_cycles(void)
 899 {
 900         return ~readl(TIMER3_VA_BASE + TIMER_VALUE);
 901 }
 902
 903 static struct clocksource clocksource_versatile = {
 904         .name           = "timer3",
 905         .rating         = 200,
 906         .read           = versatile_get_cycles,
 907         .mask           = CLOCKSOURCE_MASK(32),
 908         .shift          = 20,
 909         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 910 };
 911
 912 static int __init versatile_clocksource_init(void)
 913 {
 914         /* setup timer3 as free-running clocksource */
 915         writel(0, TIMER3_VA_BASE + TIMER_CTRL);
 916         writel(0xffffffff, TIMER3_VA_BASE + TIMER_LOAD);
 917         writel(0xffffffff, TIMER3_VA_BASE + TIMER_VALUE);
 918         writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
 919                TIMER3_VA_BASE + TIMER_CTRL);
 920
 921         clocksource_versatile.mult =
 922                 clocksource_khz2mult(1000, clocksource_versatile.shift);
 923         clocksource_register(&clocksource_versatile);
 924
 925         return 0;
 926 }
 927
 928 /*
 929  * Set up timer interrupt, and return the current time in seconds.
 930  */
 931 static void __init versatile_timer_init(void)
 932 {
 933         u32 val;
 934
 935         /*
 936          * set clock frequency:
 937          *      VERSATILE_REFCLK is 32KHz
 938          *      VERSATILE_TIMCLK is 1MHz
 939          */
 940         val = readl(__io_address(VERSATILE_SCTL_BASE));
 941         writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
 942                (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
 943                (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
 944                (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
 945                __io_address(VERSATILE_SCTL_BASE));
 946
 947         /*
 948          * Initialise to a known state (all timers off)
 949          */
 950         writel(0, TIMER0_VA_BASE + TIMER_CTRL);
 951         writel(0, TIMER1_VA_BASE + TIMER_CTRL);
 952         writel(0, TIMER2_VA_BASE + TIMER_CTRL);
 953         writel(0, TIMER3_VA_BASE + TIMER_CTRL);
 954
 955         /*
 956          * Make irqs happen for the system timer
 957          */
 958         setup_irq(IRQ_TIMERINT0_1, &versatile_timer_irq);
 959
 960         versatile_clocksource_init();
 961
 962         timer0_clockevent.mult =
 963                 div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift);
 964         timer0_clockevent.max_delta_ns =
 965                 clockevent_delta2ns(0xffffffff, &timer0_clockevent);
 966         timer0_clockevent.min_delta_ns =
 967                 clockevent_delta2ns(0xf, &timer0_clockevent);
 968
 969         timer0_clockevent.cpumask = cpumask_of_cpu(0);
 970         clockevents_register_device(&timer0_clockevent);
 971 }
 972
 973 struct sys_timer versatile_timer = {
 974         .init           = versatile_timer_init,
 975 };
 976