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