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/amba/pl061.h>
  30 #include <linux/amba/mmci.h>
  31 #include <linux/clocksource.h>
  32 #include <linux/clockchips.h>
  33 #include <linux/cnt32_to_63.h>
  34 #include <linux/io.h>
  35 #include <linux/gfp.h>
  36
  37 #include <asm/clkdev.h>
  38 #include <asm/system.h>
  39 #include <mach/hardware.h>
  40 #include <asm/irq.h>
  41 #include <asm/leds.h>
  42 #include <asm/hardware/arm_timer.h>
  43 #include <asm/hardware/icst307.h>
  44 #include <asm/hardware/vic.h>
  45 #include <asm/mach-types.h>
  46
  47 #include <asm/mach/arch.h>
  48 #include <asm/mach/flash.h>
  49 #include <asm/mach/irq.h>
  50 #include <asm/mach/time.h>
  51 #include <asm/mach/map.h>
  52
  53 #include "core.h"
  54 #include "clock.h"
  55
  56 /*
  57  * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
  58  * is the (PA >> 12).
  59  *
  60  * Setup a VA for the Versatile Vectored Interrupt Controller.
  61  */
  62 #define __io_address(n)         __io(IO_ADDRESS(n))
  63 #define VA_VIC_BASE             __io_address(VERSATILE_VIC_BASE)
  64 #define VA_SIC_BASE             __io_address(VERSATILE_SIC_BASE)
  65
  66 static void sic_mask_irq(unsigned int irq)
  67 {
  68         irq -= IRQ_SIC_START;
  69         writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
  70 }
  71
  72 static void sic_unmask_irq(unsigned int irq)
  73 {
  74         irq -= IRQ_SIC_START;
  75         writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_SET);
  76 }
  77
  78 static struct irq_chip sic_chip = {
  79         .name   = "SIC",
  80         .ack    = sic_mask_irq,
  81         .mask   = sic_mask_irq,
  82         .unmask = sic_unmask_irq,
  83 };
  84
  85 static void
  86 sic_handle_irq(unsigned int irq, struct irq_desc *desc)
  87 {
  88         unsigned long status = readl(VA_SIC_BASE + SIC_IRQ_STATUS);
  89
  90         if (status == 0) {
  91                 do_bad_IRQ(irq, desc);
  92                 return;
  93         }
  94
  95         do {
  96                 irq = ffs(status) - 1;
  97                 status &= ~(1 << irq);
  98
  99                 irq += IRQ_SIC_START;
 100
 101                 generic_handle_irq(irq);
 102         } while (status);
 103 }
 104
 105 #if 1
 106 #define IRQ_MMCI0A      IRQ_VICSOURCE22
 107 #define IRQ_AACI        IRQ_VICSOURCE24
 108 #define IRQ_ETH         IRQ_VICSOURCE25
 109 #define PIC_MASK        0xFFD00000
 110 #else
 111 #define IRQ_MMCI0A      IRQ_SIC_MMCI0A
 112 #define IRQ_AACI        IRQ_SIC_AACI
 113 #define IRQ_ETH         IRQ_SIC_ETH
 114 #define PIC_MASK        0
 115 #endif
 116
 117 void __init versatile_init_irq(void)
 118 {
 119         unsigned int i;
 120
 121         vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0, 0);
 122
 123         set_irq_chained_handler(IRQ_VICSOURCE31, sic_handle_irq);
 124
 125         /* Do second interrupt controller */
 126         writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
 127
 128         for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
 129                 if ((PIC_MASK & (1 << (i - IRQ_SIC_START))) == 0) {
 130                         set_irq_chip(i, &sic_chip);
 131                         set_irq_handler(i, handle_level_irq);
 132                         set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
 133                 }
 134         }
 135
 136         /*
 137          * Interrupts on secondary controller from 0 to 8 are routed to
 138          * source 31 on PIC.
 139          * Interrupts from 21 to 31 are routed directly to the VIC on
 140          * the corresponding number on primary controller. This is controlled
 141          * by setting PIC_ENABLEx.
 142          */
 143         writel(PIC_MASK, VA_SIC_BASE + SIC_INT_PIC_ENABLE);
 144 }
 145
 146 static struct map_desc versatile_io_desc[] __initdata = {
 147         {
 148                 .virtual        =  IO_ADDRESS(VERSATILE_SYS_BASE),
 149                 .pfn            = __phys_to_pfn(VERSATILE_SYS_BASE),
 150                 .length         = SZ_4K,
 151                 .type           = MT_DEVICE
 152         }, {
 153                 .virtual        =  IO_ADDRESS(VERSATILE_SIC_BASE),
 154                 .pfn            = __phys_to_pfn(VERSATILE_SIC_BASE),
 155                 .length         = SZ_4K,
 156                 .type           = MT_DEVICE
 157         }, {
 158                 .virtual        =  IO_ADDRESS(VERSATILE_VIC_BASE),
 159                 .pfn            = __phys_to_pfn(VERSATILE_VIC_BASE),
 160                 .length         = SZ_4K,
 161                 .type           = MT_DEVICE
 162         }, {
 163                 .virtual        =  IO_ADDRESS(VERSATILE_SCTL_BASE),
 164                 .pfn            = __phys_to_pfn(VERSATILE_SCTL_BASE),
 165                 .length         = SZ_4K * 9,
 166                 .type           = MT_DEVICE
 167         },
 168 #ifdef CONFIG_MACH_VERSATILE_AB
 169         {
 170                 .virtual        =  IO_ADDRESS(VERSATILE_GPIO0_BASE),
 171                 .pfn            = __phys_to_pfn(VERSATILE_GPIO0_BASE),
 172                 .length         = SZ_4K,
 173                 .type           = MT_DEVICE
 174         }, {
 175                 .virtual        =  IO_ADDRESS(VERSATILE_IB2_BASE),
 176                 .pfn            = __phys_to_pfn(VERSATILE_IB2_BASE),
 177                 .length         = SZ_64M,
 178                 .type           = MT_DEVICE
 179         },
 180 #endif
 181 #ifdef CONFIG_DEBUG_LL
 182         {
 183                 .virtual        =  IO_ADDRESS(VERSATILE_UART0_BASE),
 184                 .pfn            = __phys_to_pfn(VERSATILE_UART0_BASE),
 185                 .length         = SZ_4K,
 186                 .type           = MT_DEVICE
 187         },
 188 #endif
 189 #ifdef CONFIG_PCI
 190         {
 191                 .virtual        =  IO_ADDRESS(VERSATILE_PCI_CORE_BASE),
 192                 .pfn            = __phys_to_pfn(VERSATILE_PCI_CORE_BASE),
 193                 .length         = SZ_4K,
 194                 .type           = MT_DEVICE
 195         }, {
 196                 .virtual        =  (unsigned long)VERSATILE_PCI_VIRT_BASE,
 197                 .pfn            = __phys_to_pfn(VERSATILE_PCI_BASE),
 198                 .length         = VERSATILE_PCI_BASE_SIZE,
 199                 .type           = MT_DEVICE
 200         }, {
 201                 .virtual        =  (unsigned long)VERSATILE_PCI_CFG_VIRT_BASE,
 202                 .pfn            = __phys_to_pfn(VERSATILE_PCI_CFG_BASE),
 203                 .length         = VERSATILE_PCI_CFG_BASE_SIZE,
 204                 .type           = MT_DEVICE
 205         },
 206 #if 0
 207         {
 208                 .virtual        =  VERSATILE_PCI_VIRT_MEM_BASE0,
 209                 .pfn            = __phys_to_pfn(VERSATILE_PCI_MEM_BASE0),
 210                 .length         = SZ_16M,
 211                 .type           = MT_DEVICE
 212         }, {
 213                 .virtual        =  VERSATILE_PCI_VIRT_MEM_BASE1,
 214                 .pfn            = __phys_to_pfn(VERSATILE_PCI_MEM_BASE1),
 215                 .length         = SZ_16M,
 216                 .type           = MT_DEVICE
 217         }, {
 218                 .virtual        =  VERSATILE_PCI_VIRT_MEM_BASE2,
 219                 .pfn            = __phys_to_pfn(VERSATILE_PCI_MEM_BASE2),
 220                 .length         = SZ_16M,
 221                 .type           = MT_DEVICE
 222         },
 223 #endif
 224 #endif
 225 };
 226
 227 void __init versatile_map_io(void)
 228 {
 229         iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
 230 }
 231
 232 #define VERSATILE_REFCOUNTER    (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET)
 233
 234 /*
 235  * This is the Versatile sched_clock implementation.  This has
 236  * a resolution of 41.7ns, and a maximum value of about 35583 days.
 237  *
 238  * The return value is guaranteed to be monotonic in that range as
 239  * long as there is always less than 89 seconds between successive
 240  * calls to this function.
 241  */
 242 unsigned long long sched_clock(void)
 243 {
 244         unsigned long long v = cnt32_to_63(readl(VERSATILE_REFCOUNTER));
 245
 246         /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */
 247         v *= 125<<1;
 248         do_div(v, 3<<1);
 249
 250         return v;
 251 }
 252
 253
 254 #define VERSATILE_FLASHCTRL    (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET)
 255
 256 static int versatile_flash_init(void)
 257 {
 258         u32 val;
 259
 260         val = __raw_readl(VERSATILE_FLASHCTRL);
 261         val &= ~VERSATILE_FLASHPROG_FLVPPEN;
 262         __raw_writel(val, VERSATILE_FLASHCTRL);
 263
 264         return 0;
 265 }
 266
 267 static void versatile_flash_exit(void)
 268 {
 269         u32 val;
 270
 271         val = __raw_readl(VERSATILE_FLASHCTRL);
 272         val &= ~VERSATILE_FLASHPROG_FLVPPEN;
 273         __raw_writel(val, VERSATILE_FLASHCTRL);
 274 }
 275
 276 static void versatile_flash_set_vpp(int on)
 277 {
 278         u32 val;
 279
 280         val = __raw_readl(VERSATILE_FLASHCTRL);
 281         if (on)
 282                 val |= VERSATILE_FLASHPROG_FLVPPEN;
 283         else
 284                 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
 285         __raw_writel(val, VERSATILE_FLASHCTRL);
 286 }
 287
 288 static struct flash_platform_data versatile_flash_data = {
 289         .map_name               = "cfi_probe",
 290         .width                  = 4,
 291         .init                   = versatile_flash_init,
 292         .exit                   = versatile_flash_exit,
 293         .set_vpp                = versatile_flash_set_vpp,
 294 };
 295
 296 static struct resource versatile_flash_resource = {
 297         .start                  = VERSATILE_FLASH_BASE,
 298         .end                    = VERSATILE_FLASH_BASE + VERSATILE_FLASH_SIZE - 1,
 299         .flags                  = IORESOURCE_MEM,
 300 };
 301
 302 static struct platform_device versatile_flash_device = {
 303         .name                   = "armflash",
 304         .id                     = 0,
 305         .dev                    = {
 306                 .platform_data  = &versatile_flash_data,
 307         },
 308         .num_resources          = 1,
 309         .resource               = &versatile_flash_resource,
 310 };
 311
 312 static struct resource smc91x_resources[] = {
 313         [0] = {
 314                 .start          = VERSATILE_ETH_BASE,
 315                 .end            = VERSATILE_ETH_BASE + SZ_64K - 1,
 316                 .flags          = IORESOURCE_MEM,
 317         },
 318         [1] = {
 319                 .start          = IRQ_ETH,
 320                 .end            = IRQ_ETH,
 321                 .flags          = IORESOURCE_IRQ,
 322         },
 323 };
 324
 325 static struct platform_device smc91x_device = {
 326         .name           = "smc91x",
 327         .id             = 0,
 328         .num_resources  = ARRAY_SIZE(smc91x_resources),
 329         .resource       = smc91x_resources,
 330 };
 331
 332 static struct resource versatile_i2c_resource = {
 333         .start                  = VERSATILE_I2C_BASE,
 334         .end                    = VERSATILE_I2C_BASE + SZ_4K - 1,
 335         .flags                  = IORESOURCE_MEM,
 336 };
 337
 338 static struct platform_device versatile_i2c_device = {
 339         .name                   = "versatile-i2c",
 340         .id                     = 0,
 341         .num_resources          = 1,
 342         .resource               = &versatile_i2c_resource,
 343 };
 344
 345 static struct i2c_board_info versatile_i2c_board_info[] = {
 346         {
 347                 I2C_BOARD_INFO("ds1338", 0xd0 >> 1),
 348         },
 349 };
 350
 351 static int __init versatile_i2c_init(void)
 352 {
 353         return i2c_register_board_info(0, versatile_i2c_board_info,
 354                                        ARRAY_SIZE(versatile_i2c_board_info));
 355 }
 356 arch_initcall(versatile_i2c_init);
 357
 358 #define VERSATILE_SYSMCI        (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET)
 359
 360 unsigned int mmc_status(struct device *dev)
 361 {
 362         struct amba_device *adev = container_of(dev, struct amba_device, dev);
 363         u32 mask;
 364
 365         if (adev->res.start == VERSATILE_MMCI0_BASE)
 366                 mask = 1;
 367         else
 368                 mask = 2;
 369
 370         return readl(VERSATILE_SYSMCI) & mask;
 371 }
 372
 373 static struct mmci_platform_data mmc0_plat_data = {
 374         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 375         .status         = mmc_status,
 376         .gpio_wp        = -1,
 377         .gpio_cd        = -1,
 378 };
 379
 380 /*
 381  * Clock handling
 382  */
 383 static const struct icst307_params versatile_oscvco_params = {
 384         .ref            = 24000,
 385         .vco_max        = 200000,
 386         .vd_min         = 4 + 8,
 387         .vd_max         = 511 + 8,
 388         .rd_min         = 1 + 2,
 389         .rd_max         = 127 + 2,
 390 };
 391
 392 static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
 393 {
 394         void __iomem *sys = __io_address(VERSATILE_SYS_BASE);
 395         void __iomem *sys_lock = sys + VERSATILE_SYS_LOCK_OFFSET;
 396         u32 val;
 397
 398         val = readl(sys + clk->oscoff) & ~0x7ffff;
 399         val |= vco.v | (vco.r << 9) | (vco.s << 16);
 400
 401         writel(0xa05f, sys_lock);
 402         writel(val, sys + clk->oscoff);
 403         writel(0, sys_lock);
 404 }
 405
 406 static struct clk osc4_clk = {
 407         .params = &versatile_oscvco_params,
 408         .oscoff = VERSATILE_SYS_OSCCLCD_OFFSET,
 409         .setvco = versatile_oscvco_set,
 410 };
 411
 412 /*
 413  * These are fixed clocks.
 414  */
 415 static struct clk ref24_clk = {
 416         .rate   = 24000000,
 417 };
 418
 419 static struct clk_lookup lookups[] = {
 420         {       /* UART0 */
 421                 .dev_id         = "dev:f1",
 422                 .clk            = &ref24_clk,
 423         }, {    /* UART1 */
 424                 .dev_id         = "dev:f2",
 425                 .clk            = &ref24_clk,
 426         }, {    /* UART2 */
 427                 .dev_id         = "dev:f3",
 428                 .clk            = &ref24_clk,
 429         }, {    /* UART3 */
 430                 .dev_id         = "fpga:09",
 431                 .clk            = &ref24_clk,
 432         }, {    /* KMI0 */
 433                 .dev_id         = "fpga:06",
 434                 .clk            = &ref24_clk,
 435         }, {    /* KMI1 */
 436                 .dev_id         = "fpga:07",
 437                 .clk            = &ref24_clk,
 438         }, {    /* MMC0 */
 439                 .dev_id         = "fpga:05",
 440                 .clk            = &ref24_clk,
 441         }, {    /* MMC1 */
 442                 .dev_id         = "fpga:0b",
 443                 .clk            = &ref24_clk,
 444         }, {    /* CLCD */
 445                 .dev_id         = "dev:20",
 446                 .clk            = &osc4_clk,
 447         }
 448 };
 449
 450 /*
 451  * CLCD support.
 452  */
 453 #define SYS_CLCD_MODE_MASK      (3 << 0)
 454 #define SYS_CLCD_MODE_888       (0 << 0)
 455 #define SYS_CLCD_MODE_5551      (1 << 0)
 456 #define SYS_CLCD_MODE_565_RLSB  (2 << 0)
 457 #define SYS_CLCD_MODE_565_BLSB  (3 << 0)
 458 #define SYS_CLCD_NLCDIOON       (1 << 2)
 459 #define SYS_CLCD_VDDPOSSWITCH   (1 << 3)
 460 #define SYS_CLCD_PWR3V5SWITCH   (1 << 4)
 461 #define SYS_CLCD_ID_MASK        (0x1f << 8)
 462 #define SYS_CLCD_ID_SANYO_3_8   (0x00 << 8)
 463 #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
 464 #define SYS_CLCD_ID_EPSON_2_2   (0x02 << 8)
 465 #define SYS_CLCD_ID_SANYO_2_5   (0x07 << 8)
 466 #define SYS_CLCD_ID_VGA         (0x1f << 8)
 467
 468 static struct clcd_panel vga = {
 469         .mode           = {
 470                 .name           = "VGA",
 471                 .refresh        = 60,
 472                 .xres           = 640,
 473                 .yres           = 480,
 474                 .pixclock       = 39721,
 475                 .left_margin    = 40,
 476                 .right_margin   = 24,
 477                 .upper_margin   = 32,
 478                 .lower_margin   = 11,
 479                 .hsync_len      = 96,
 480                 .vsync_len      = 2,
 481                 .sync           = 0,
 482                 .vmode          = FB_VMODE_NONINTERLACED,
 483         },
 484         .width          = -1,
 485         .height         = -1,
 486         .tim2           = TIM2_BCD | TIM2_IPC,
 487         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 488         .bpp            = 16,
 489 };
 490
 491 static struct clcd_panel sanyo_3_8_in = {
 492         .mode           = {
 493                 .name           = "Sanyo QVGA",
 494                 .refresh        = 116,
 495                 .xres           = 320,
 496                 .yres           = 240,
 497                 .pixclock       = 100000,
 498                 .left_margin    = 6,
 499                 .right_margin   = 6,
 500                 .upper_margin   = 5,
 501                 .lower_margin   = 5,
 502                 .hsync_len      = 6,
 503                 .vsync_len      = 6,
 504                 .sync           = 0,
 505                 .vmode          = FB_VMODE_NONINTERLACED,
 506         },
 507         .width          = -1,
 508         .height         = -1,
 509         .tim2           = TIM2_BCD,
 510         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 511         .bpp            = 16,
 512 };
 513
 514 static struct clcd_panel sanyo_2_5_in = {
 515         .mode           = {
 516                 .name           = "Sanyo QVGA Portrait",
 517                 .refresh        = 116,
 518                 .xres           = 240,
 519                 .yres           = 320,
 520                 .pixclock       = 100000,
 521                 .left_margin    = 20,
 522                 .right_margin   = 10,
 523                 .upper_margin   = 2,
 524                 .lower_margin   = 2,
 525                 .hsync_len      = 10,
 526                 .vsync_len      = 2,
 527                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 528                 .vmode          = FB_VMODE_NONINTERLACED,
 529         },
 530         .width          = -1,
 531         .height         = -1,
 532         .tim2           = TIM2_IVS | TIM2_IHS | TIM2_IPC,
 533         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 534         .bpp            = 16,
 535 };
 536
 537 static struct clcd_panel epson_2_2_in = {
 538         .mode           = {
 539                 .name           = "Epson QCIF",
 540                 .refresh        = 390,
 541                 .xres           = 176,
 542                 .yres           = 220,
 543                 .pixclock       = 62500,
 544                 .left_margin    = 3,
 545                 .right_margin   = 2,
 546                 .upper_margin   = 1,
 547                 .lower_margin   = 0,
 548                 .hsync_len      = 3,
 549                 .vsync_len      = 2,
 550                 .sync           = 0,
 551                 .vmode          = FB_VMODE_NONINTERLACED,
 552         },
 553         .width          = -1,
 554         .height         = -1,
 555         .tim2           = TIM2_BCD | TIM2_IPC,
 556         .cntl           = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
 557         .bpp            = 16,
 558 };
 559
 560 /*
 561  * Detect which LCD panel is connected, and return the appropriate
 562  * clcd_panel structure.  Note: we do not have any information on
 563  * the required timings for the 8.4in panel, so we presently assume
 564  * VGA timings.
 565  */
 566 static struct clcd_panel *versatile_clcd_panel(void)
 567 {
 568         void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
 569         struct clcd_panel *panel = &vga;
 570         u32 val;
 571
 572         val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
 573         if (val == SYS_CLCD_ID_SANYO_3_8)
 574                 panel = &sanyo_3_8_in;
 575         else if (val == SYS_CLCD_ID_SANYO_2_5)
 576                 panel = &sanyo_2_5_in;
 577         else if (val == SYS_CLCD_ID_EPSON_2_2)
 578                 panel = &epson_2_2_in;
 579         else if (val == SYS_CLCD_ID_VGA)
 580                 panel = &vga;
 581         else {
 582                 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
 583                         val);
 584                 panel = &vga;
 585         }
 586
 587         return panel;
 588 }
 589
 590 /*
 591  * Disable all display connectors on the interface module.
 592  */
 593 static void versatile_clcd_disable(struct clcd_fb *fb)
 594 {
 595         void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
 596         u32 val;
 597
 598         val = readl(sys_clcd);
 599         val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
 600         writel(val, sys_clcd);
 601
 602 #ifdef CONFIG_MACH_VERSATILE_AB
 603         /*
 604          * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
 605          */
 606         if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
 607                 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
 608                 unsigned long ctrl;
 609
 610                 ctrl = readl(versatile_ib2_ctrl);
 611                 ctrl &= ~0x01;
 612                 writel(ctrl, versatile_ib2_ctrl);
 613         }
 614 #endif
 615 }
 616
 617 /*
 618  * Enable the relevant connector on the interface module.
 619  */
 620 static void versatile_clcd_enable(struct clcd_fb *fb)
 621 {
 622         void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
 623         u32 val;
 624
 625         val = readl(sys_clcd);
 626         val &= ~SYS_CLCD_MODE_MASK;
 627
 628         switch (fb->fb.var.green.length) {
 629         case 5:
 630                 val |= SYS_CLCD_MODE_5551;
 631                 break;
 632         case 6:
 633                 val |= SYS_CLCD_MODE_565_RLSB;
 634                 break;
 635         case 8:
 636                 val |= SYS_CLCD_MODE_888;
 637                 break;
 638         }
 639
 640         /*
 641          * Set the MUX
 642          */
 643         writel(val, sys_clcd);
 644
 645         /*
 646          * And now enable the PSUs
 647          */
 648         val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
 649         writel(val, sys_clcd);
 650
 651 #ifdef CONFIG_MACH_VERSATILE_AB
 652         /*
 653          * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
 654          */
 655         if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
 656                 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
 657                 unsigned long ctrl;
 658
 659                 ctrl = readl(versatile_ib2_ctrl);
 660                 ctrl |= 0x01;
 661                 writel(ctrl, versatile_ib2_ctrl);
 662         }
 663 #endif
 664 }
 665
 666 static unsigned long framesize = SZ_1M;
 667
 668 static int versatile_clcd_setup(struct clcd_fb *fb)
 669 {
 670         dma_addr_t dma;
 671
 672         fb->panel               = versatile_clcd_panel();
 673
 674         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
 675                                                     &dma, GFP_KERNEL);
 676         if (!fb->fb.screen_base) {
 677                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
 678                 return -ENOMEM;
 679         }
 680
 681         fb->fb.fix.smem_start   = dma;
 682         fb->fb.fix.smem_len     = framesize;
 683
 684         return 0;
 685 }
 686
 687 static int versatile_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 688 {
 689         return dma_mmap_writecombine(&fb->dev->dev, vma,
 690                                      fb->fb.screen_base,
 691                                      fb->fb.fix.smem_start,
 692                                      fb->fb.fix.smem_len);
 693 }
 694
 695 static void versatile_clcd_remove(struct clcd_fb *fb)
 696 {
 697         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 698                               fb->fb.screen_base, fb->fb.fix.smem_start);
 699 }
 700
 701 static struct clcd_board clcd_plat_data = {
 702         .name           = "Versatile",
 703         .check          = clcdfb_check,
 704         .decode         = clcdfb_decode,
 705         .disable        = versatile_clcd_disable,
 706         .enable         = versatile_clcd_enable,
 707         .setup          = versatile_clcd_setup,
 708         .mmap           = versatile_clcd_mmap,
 709         .remove         = versatile_clcd_remove,
 710 };
 711
 712 static struct pl061_platform_data gpio0_plat_data = {
 713         .gpio_base      = 0,
 714         .irq_base       = IRQ_GPIO0_START,
 715 };
 716
 717 static struct pl061_platform_data gpio1_plat_data = {
 718         .gpio_base      = 8,
 719         .irq_base       = IRQ_GPIO1_START,
 720 };
 721
 722 #define AACI_IRQ        { IRQ_AACI, NO_IRQ }
 723 #define AACI_DMA        { 0x80, 0x81 }
 724 #define MMCI0_IRQ       { IRQ_MMCI0A,IRQ_SIC_MMCI0B }
 725 #define MMCI0_DMA       { 0x84, 0 }
 726 #define KMI0_IRQ        { IRQ_SIC_KMI0, NO_IRQ }
 727 #define KMI0_DMA        { 0, 0 }
 728 #define KMI1_IRQ        { IRQ_SIC_KMI1, NO_IRQ }
 729 #define KMI1_DMA        { 0, 0 }
 730
 731 /*
 732  * These devices are connected directly to the multi-layer AHB switch
 733  */
 734 #define SMC_IRQ         { NO_IRQ, NO_IRQ }
 735 #define SMC_DMA         { 0, 0 }
 736 #define MPMC_IRQ        { NO_IRQ, NO_IRQ }
 737 #define MPMC_DMA        { 0, 0 }
 738 #define CLCD_IRQ        { IRQ_CLCDINT, NO_IRQ }
 739 #define CLCD_DMA        { 0, 0 }
 740 #define DMAC_IRQ        { IRQ_DMAINT, NO_IRQ }
 741 #define DMAC_DMA        { 0, 0 }
 742
 743 /*
 744  * These devices are connected via the core APB bridge
 745  */
 746 #define SCTL_IRQ        { NO_IRQ, NO_IRQ }
 747 #define SCTL_DMA        { 0, 0 }
 748 #define WATCHDOG_IRQ    { IRQ_WDOGINT, NO_IRQ }
 749 #define WATCHDOG_DMA    { 0, 0 }
 750 #define GPIO0_IRQ       { IRQ_GPIOINT0, NO_IRQ }
 751 #define GPIO0_DMA       { 0, 0 }
 752 #define GPIO1_IRQ       { IRQ_GPIOINT1, NO_IRQ }
 753 #define GPIO1_DMA       { 0, 0 }
 754 #define RTC_IRQ         { IRQ_RTCINT, NO_IRQ }
 755 #define RTC_DMA         { 0, 0 }
 756
 757 /*
 758  * These devices are connected via the DMA APB bridge
 759  */
 760 #define SCI_IRQ         { IRQ_SCIINT, NO_IRQ }
 761 #define SCI_DMA         { 7, 6 }
 762 #define UART0_IRQ       { IRQ_UARTINT0, NO_IRQ }
 763 #define UART0_DMA       { 15, 14 }
 764 #define UART1_IRQ       { IRQ_UARTINT1, NO_IRQ }
 765 #define UART1_DMA       { 13, 12 }
 766 #define UART2_IRQ       { IRQ_UARTINT2, NO_IRQ }
 767 #define UART2_DMA       { 11, 10 }
 768 #define SSP_IRQ         { IRQ_SSPINT, NO_IRQ }
 769 #define SSP_DMA         { 9, 8 }
 770
 771 /* FPGA Primecells */
 772 AMBA_DEVICE(aaci,  "fpga:04", AACI,     NULL);
 773 AMBA_DEVICE(mmc0,  "fpga:05", MMCI0,    &mmc0_plat_data);
 774 AMBA_DEVICE(kmi0,  "fpga:06", KMI0,     NULL);
 775 AMBA_DEVICE(kmi1,  "fpga:07", KMI1,     NULL);
 776
 777 /* DevChip Primecells */
 778 AMBA_DEVICE(smc,   "dev:00",  SMC,      NULL);
 779 AMBA_DEVICE(mpmc,  "dev:10",  MPMC,     NULL);
 780 AMBA_DEVICE(clcd,  "dev:20",  CLCD,     &clcd_plat_data);
 781 AMBA_DEVICE(dmac,  "dev:30",  DMAC,     NULL);
 782 AMBA_DEVICE(sctl,  "dev:e0",  SCTL,     NULL);
 783 AMBA_DEVICE(wdog,  "dev:e1",  WATCHDOG, NULL);
 784 AMBA_DEVICE(gpio0, "dev:e4",  GPIO0,    &gpio0_plat_data);
 785 AMBA_DEVICE(gpio1, "dev:e5",  GPIO1,    &gpio1_plat_data);
 786 AMBA_DEVICE(rtc,   "dev:e8",  RTC,      NULL);
 787 AMBA_DEVICE(sci0,  "dev:f0",  SCI,      NULL);
 788 AMBA_DEVICE(uart0, "dev:f1",  UART0,    NULL);
 789 AMBA_DEVICE(uart1, "dev:f2",  UART1,    NULL);
 790 AMBA_DEVICE(uart2, "dev:f3",  UART2,    NULL);
 791 AMBA_DEVICE(ssp0,  "dev:f4",  SSP,      NULL);
 792
 793 static struct amba_device *amba_devs[] __initdata = {
 794         &dmac_device,
 795         &uart0_device,
 796         &uart1_device,
 797         &uart2_device,
 798         &smc_device,
 799         &mpmc_device,
 800         &clcd_device,
 801         &sctl_device,
 802         &wdog_device,
 803         &gpio0_device,
 804         &gpio1_device,
 805         &rtc_device,
 806         &sci0_device,
 807         &ssp0_device,
 808         &aaci_device,
 809         &mmc0_device,
 810         &kmi0_device,
 811         &kmi1_device,
 812 };
 813
 814 #ifdef CONFIG_LEDS
 815 #define VA_LEDS_BASE (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET)
 816
 817 static void versatile_leds_event(led_event_t ledevt)
 818 {
 819         unsigned long flags;
 820         u32 val;
 821
 822         local_irq_save(flags);
 823         val = readl(VA_LEDS_BASE);
 824
 825         switch (ledevt) {
 826         case led_idle_start:
 827                 val = val & ~VERSATILE_SYS_LED0;
 828                 break;
 829
 830         case led_idle_end:
 831                 val = val | VERSATILE_SYS_LED0;
 832                 break;
 833
 834         case led_timer:
 835                 val = val ^ VERSATILE_SYS_LED1;
 836                 break;
 837
 838         case led_halted:
 839                 val = 0;
 840                 break;
 841
 842         default:
 843                 break;
 844         }
 845
 846         writel(val, VA_LEDS_BASE);
 847         local_irq_restore(flags);
 848 }
 849 #endif  /* CONFIG_LEDS */
 850
 851 void __init versatile_init(void)
 852 {
 853         int i;
 854
 855         clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 856
 857         platform_device_register(&versatile_flash_device);
 858         platform_device_register(&versatile_i2c_device);
 859         platform_device_register(&smc91x_device);
 860
 861         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 862                 struct amba_device *d = amba_devs[i];
 863                 amba_device_register(d, &iomem_resource);
 864         }
 865
 866 #ifdef CONFIG_LEDS
 867         leds_event = versatile_leds_event;
 868 #endif
 869 }
 870
 871 /*
 872  * Where is the timer (VA)?
 873  */
 874 #define TIMER0_VA_BASE           __io_address(VERSATILE_TIMER0_1_BASE)
 875 #define TIMER1_VA_BASE          (__io_address(VERSATILE_TIMER0_1_BASE) + 0x20)
 876 #define TIMER2_VA_BASE           __io_address(VERSATILE_TIMER2_3_BASE)
 877 #define TIMER3_VA_BASE          (__io_address(VERSATILE_TIMER2_3_BASE) + 0x20)
 878 #define VA_IC_BASE               __io_address(VERSATILE_VIC_BASE)
 879
 880 /*
 881  * How long is the timer interval?
 882  */
 883 #define TIMER_INTERVAL  (TICKS_PER_uSEC * mSEC_10)
 884 #if TIMER_INTERVAL >= 0x100000
 885 #define TIMER_RELOAD    (TIMER_INTERVAL >> 8)
 886 #define TIMER_DIVISOR   (TIMER_CTRL_DIV256)
 887 #define TICKS2USECS(x)  (256 * (x) / TICKS_PER_uSEC)
 888 #elif TIMER_INTERVAL >= 0x10000
 889 #define TIMER_RELOAD    (TIMER_INTERVAL >> 4)           /* Divide by 16 */
 890 #define TIMER_DIVISOR   (TIMER_CTRL_DIV16)
 891 #define TICKS2USECS(x)  (16 * (x) / TICKS_PER_uSEC)
 892 #else
 893 #define TIMER_RELOAD    (TIMER_INTERVAL)
 894 #define TIMER_DIVISOR   (TIMER_CTRL_DIV1)
 895 #define TICKS2USECS(x)  ((x) / TICKS_PER_uSEC)
 896 #endif
 897
 898 static void timer_set_mode(enum clock_event_mode mode,
 899                            struct clock_event_device *clk)
 900 {
 901         unsigned long ctrl;
 902
 903         switch(mode) {
 904         case CLOCK_EVT_MODE_PERIODIC:
 905                 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
 906
 907                 ctrl = TIMER_CTRL_PERIODIC;
 908                 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE;
 909                 break;
 910         case CLOCK_EVT_MODE_ONESHOT:
 911                 /* period set, and timer enabled in 'next_event' hook */
 912                 ctrl = TIMER_CTRL_ONESHOT;
 913                 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE;
 914                 break;
 915         case CLOCK_EVT_MODE_UNUSED:
 916         case CLOCK_EVT_MODE_SHUTDOWN:
 917         default:
 918                 ctrl = 0;
 919         }
 920
 921         writel(ctrl, TIMER0_VA_BASE + TIMER_CTRL);
 922 }
 923
 924 static int timer_set_next_event(unsigned long evt,
 925                                 struct clock_event_device *unused)
 926 {
 927         unsigned long ctrl = readl(TIMER0_VA_BASE + TIMER_CTRL);
 928
 929         writel(evt, TIMER0_VA_BASE + TIMER_LOAD);
 930         writel(ctrl | TIMER_CTRL_ENABLE, TIMER0_VA_BASE + TIMER_CTRL);
 931
 932         return 0;
 933 }
 934
 935 static struct clock_event_device timer0_clockevent =     {
 936         .name           = "timer0",
 937         .shift          = 32,
 938         .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 939         .set_mode       = timer_set_mode,
 940         .set_next_event = timer_set_next_event,
 941 };
 942
 943 /*
 944  * IRQ handler for the timer
 945  */
 946 static irqreturn_t versatile_timer_interrupt(int irq, void *dev_id)
 947 {
 948         struct clock_event_device *evt = &timer0_clockevent;
 949
 950         writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
 951
 952         evt->event_handler(evt);
 953
 954         return IRQ_HANDLED;
 955 }
 956
 957 static struct irqaction versatile_timer_irq = {
 958         .name           = "Versatile Timer Tick",
 959         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 960         .handler        = versatile_timer_interrupt,
 961 };
 962
 963 static cycle_t versatile_get_cycles(struct clocksource *cs)
 964 {
 965         return ~readl(TIMER3_VA_BASE + TIMER_VALUE);
 966 }
 967
 968 static struct clocksource clocksource_versatile = {
 969         .name           = "timer3",
 970         .rating         = 200,
 971         .read           = versatile_get_cycles,
 972         .mask           = CLOCKSOURCE_MASK(32),
 973         .shift          = 20,
 974         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 975 };
 976
 977 static int __init versatile_clocksource_init(void)
 978 {
 979         /* setup timer3 as free-running clocksource */
 980         writel(0, TIMER3_VA_BASE + TIMER_CTRL);
 981         writel(0xffffffff, TIMER3_VA_BASE + TIMER_LOAD);
 982         writel(0xffffffff, TIMER3_VA_BASE + TIMER_VALUE);
 983         writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
 984                TIMER3_VA_BASE + TIMER_CTRL);
 985
 986         clocksource_versatile.mult =
 987                 clocksource_khz2mult(1000, clocksource_versatile.shift);
 988         clocksource_register(&clocksource_versatile);
 989
 990         return 0;
 991 }
 992
 993 /*
 994  * Set up timer interrupt, and return the current time in seconds.
 995  */
 996 static void __init versatile_timer_init(void)
 997 {
 998         u32 val;
 999
1000         /*
1001          * set clock frequency:
1002          *      VERSATILE_REFCLK is 32KHz
1003          *      VERSATILE_TIMCLK is 1MHz
1004          */
1005         val = readl(__io_address(VERSATILE_SCTL_BASE));
1006         writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
1007                (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
1008                (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
1009                (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
1010                __io_address(VERSATILE_SCTL_BASE));
1011
1012         /*
1013          * Initialise to a known state (all timers off)
1014          */
1015         writel(0, TIMER0_VA_BASE + TIMER_CTRL);
1016         writel(0, TIMER1_VA_BASE + TIMER_CTRL);
1017         writel(0, TIMER2_VA_BASE + TIMER_CTRL);
1018         writel(0, TIMER3_VA_BASE + TIMER_CTRL);
1019
1020         /*
1021          * Make irqs happen for the system timer
1022          */
1023         setup_irq(IRQ_TIMERINT0_1, &versatile_timer_irq);
1024
1025         versatile_clocksource_init();
1026
1027         timer0_clockevent.mult =
1028                 div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift);
1029         timer0_clockevent.max_delta_ns =
1030                 clockevent_delta2ns(0xffffffff, &timer0_clockevent);
1031         timer0_clockevent.min_delta_ns =
1032                 clockevent_delta2ns(0xf, &timer0_clockevent);
1033
1034         timer0_clockevent.cpumask = cpumask_of(0);
1035         clockevents_register_device(&timer0_clockevent);
1036 }
1037
1038 struct sys_timer versatile_timer = {
1039         .init           = versatile_timer_init,
1040 };
1041