arch/arm/mach-shmobile/setup-r8a7740.c

   1 /*
   2  * R8A7740 processor support
   3  *
   4  * Copyright (C) 2011  Renesas Solutions Corp.
   5  * Copyright (C) 2011  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   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; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20 #include <linux/delay.h>
  21 #include <linux/dma-mapping.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/io.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/of_platform.h>
  27 #include <linux/serial_sci.h>
  28 #include <linux/sh_dma.h>
  29 #include <linux/sh_timer.h>
  30 #include <linux/dma-mapping.h>
  31 #include <mach/dma-register.h>
  32 #include <mach/r8a7740.h>
  33 #include <mach/pm-rmobile.h>
  34 #include <mach/common.h>
  35 #include <mach/irqs.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/mach/map.h>
  38 #include <asm/mach/arch.h>
  39 #include <asm/mach/time.h>
  40
  41 static struct map_desc r8a7740_io_desc[] __initdata = {
  42          /*
  43           * for CPGA/INTC/PFC
  44           * 0xe6000000-0xefffffff -> 0xe6000000-0xefffffff
  45           */
  46         {
  47                 .virtual        = 0xe6000000,
  48                 .pfn            = __phys_to_pfn(0xe6000000),
  49                 .length         = 160 << 20,
  50                 .type           = MT_DEVICE_NONSHARED
  51         },
  52 #ifdef CONFIG_CACHE_L2X0
  53         /*
  54          * for l2x0_init()
  55          * 0xf0100000-0xf0101000 -> 0xf0002000-0xf0003000
  56          */
  57         {
  58                 .virtual        = 0xf0002000,
  59                 .pfn            = __phys_to_pfn(0xf0100000),
  60                 .length         = PAGE_SIZE,
  61                 .type           = MT_DEVICE_NONSHARED
  62         },
  63 #endif
  64 };
  65
  66 void __init r8a7740_map_io(void)
  67 {
  68         iotable_init(r8a7740_io_desc, ARRAY_SIZE(r8a7740_io_desc));
  69 }
  70
  71 /* SCIFA0 */
  72 static struct plat_sci_port scif0_platform_data = {
  73         .mapbase        = 0xe6c40000,
  74         .flags          = UPF_BOOT_AUTOCONF,
  75         .scscr          = SCSCR_RE | SCSCR_TE,
  76         .scbrr_algo_id  = SCBRR_ALGO_4,
  77         .type           = PORT_SCIFA,
  78         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c00)),
  79 };
  80
  81 static struct platform_device scif0_device = {
  82         .name           = "sh-sci",
  83         .id             = 0,
  84         .dev            = {
  85                 .platform_data  = &scif0_platform_data,
  86         },
  87 };
  88
  89 /* SCIFA1 */
  90 static struct plat_sci_port scif1_platform_data = {
  91         .mapbase        = 0xe6c50000,
  92         .flags          = UPF_BOOT_AUTOCONF,
  93         .scscr          = SCSCR_RE | SCSCR_TE,
  94         .scbrr_algo_id  = SCBRR_ALGO_4,
  95         .type           = PORT_SCIFA,
  96         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c20)),
  97 };
  98
  99 static struct platform_device scif1_device = {
 100         .name           = "sh-sci",
 101         .id             = 1,
 102         .dev            = {
 103                 .platform_data  = &scif1_platform_data,
 104         },
 105 };
 106
 107 /* SCIFA2 */
 108 static struct plat_sci_port scif2_platform_data = {
 109         .mapbase        = 0xe6c60000,
 110         .flags          = UPF_BOOT_AUTOCONF,
 111         .scscr          = SCSCR_RE | SCSCR_TE,
 112         .scbrr_algo_id  = SCBRR_ALGO_4,
 113         .type           = PORT_SCIFA,
 114         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c40)),
 115 };
 116
 117 static struct platform_device scif2_device = {
 118         .name           = "sh-sci",
 119         .id             = 2,
 120         .dev            = {
 121                 .platform_data  = &scif2_platform_data,
 122         },
 123 };
 124
 125 /* SCIFA3 */
 126 static struct plat_sci_port scif3_platform_data = {
 127         .mapbase        = 0xe6c70000,
 128         .flags          = UPF_BOOT_AUTOCONF,
 129         .scscr          = SCSCR_RE | SCSCR_TE,
 130         .scbrr_algo_id  = SCBRR_ALGO_4,
 131         .type           = PORT_SCIFA,
 132         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c60)),
 133 };
 134
 135 static struct platform_device scif3_device = {
 136         .name           = "sh-sci",
 137         .id             = 3,
 138         .dev            = {
 139                 .platform_data  = &scif3_platform_data,
 140         },
 141 };
 142
 143 /* SCIFA4 */
 144 static struct plat_sci_port scif4_platform_data = {
 145         .mapbase        = 0xe6c80000,
 146         .flags          = UPF_BOOT_AUTOCONF,
 147         .scscr          = SCSCR_RE | SCSCR_TE,
 148         .scbrr_algo_id  = SCBRR_ALGO_4,
 149         .type           = PORT_SCIFA,
 150         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d20)),
 151 };
 152
 153 static struct platform_device scif4_device = {
 154         .name           = "sh-sci",
 155         .id             = 4,
 156         .dev            = {
 157                 .platform_data  = &scif4_platform_data,
 158         },
 159 };
 160
 161 /* SCIFA5 */
 162 static struct plat_sci_port scif5_platform_data = {
 163         .mapbase        = 0xe6cb0000,
 164         .flags          = UPF_BOOT_AUTOCONF,
 165         .scscr          = SCSCR_RE | SCSCR_TE,
 166         .scbrr_algo_id  = SCBRR_ALGO_4,
 167         .type           = PORT_SCIFA,
 168         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d40)),
 169 };
 170
 171 static struct platform_device scif5_device = {
 172         .name           = "sh-sci",
 173         .id             = 5,
 174         .dev            = {
 175                 .platform_data  = &scif5_platform_data,
 176         },
 177 };
 178
 179 /* SCIFA6 */
 180 static struct plat_sci_port scif6_platform_data = {
 181         .mapbase        = 0xe6cc0000,
 182         .flags          = UPF_BOOT_AUTOCONF,
 183         .scscr          = SCSCR_RE | SCSCR_TE,
 184         .scbrr_algo_id  = SCBRR_ALGO_4,
 185         .type           = PORT_SCIFA,
 186         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x04c0)),
 187 };
 188
 189 static struct platform_device scif6_device = {
 190         .name           = "sh-sci",
 191         .id             = 6,
 192         .dev            = {
 193                 .platform_data  = &scif6_platform_data,
 194         },
 195 };
 196
 197 /* SCIFA7 */
 198 static struct plat_sci_port scif7_platform_data = {
 199         .mapbase        = 0xe6cd0000,
 200         .flags          = UPF_BOOT_AUTOCONF,
 201         .scscr          = SCSCR_RE | SCSCR_TE,
 202         .scbrr_algo_id  = SCBRR_ALGO_4,
 203         .type           = PORT_SCIFA,
 204         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x04e0)),
 205 };
 206
 207 static struct platform_device scif7_device = {
 208         .name           = "sh-sci",
 209         .id             = 7,
 210         .dev            = {
 211                 .platform_data  = &scif7_platform_data,
 212         },
 213 };
 214
 215 /* SCIFB */
 216 static struct plat_sci_port scifb_platform_data = {
 217         .mapbase        = 0xe6c30000,
 218         .flags          = UPF_BOOT_AUTOCONF,
 219         .scscr          = SCSCR_RE | SCSCR_TE,
 220         .scbrr_algo_id  = SCBRR_ALGO_4,
 221         .type           = PORT_SCIFB,
 222         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d60)),
 223 };
 224
 225 static struct platform_device scifb_device = {
 226         .name           = "sh-sci",
 227         .id             = 8,
 228         .dev            = {
 229                 .platform_data  = &scifb_platform_data,
 230         },
 231 };
 232
 233 /* CMT */
 234 static struct sh_timer_config cmt10_platform_data = {
 235         .name = "CMT10",
 236         .channel_offset = 0x10,
 237         .timer_bit = 0,
 238         .clockevent_rating = 125,
 239         .clocksource_rating = 125,
 240 };
 241
 242 static struct resource cmt10_resources[] = {
 243         [0] = {
 244                 .name   = "CMT10",
 245                 .start  = 0xe6138010,
 246                 .end    = 0xe613801b,
 247                 .flags  = IORESOURCE_MEM,
 248         },
 249         [1] = {
 250                 .start  = evt2irq(0x0b00),
 251                 .flags  = IORESOURCE_IRQ,
 252         },
 253 };
 254
 255 static struct platform_device cmt10_device = {
 256         .name           = "sh_cmt",
 257         .id             = 10,
 258         .dev = {
 259                 .platform_data  = &cmt10_platform_data,
 260         },
 261         .resource       = cmt10_resources,
 262         .num_resources  = ARRAY_SIZE(cmt10_resources),
 263 };
 264
 265 static struct platform_device *r8a7740_early_devices[] __initdata = {
 266         &scif0_device,
 267         &scif1_device,
 268         &scif2_device,
 269         &scif3_device,
 270         &scif4_device,
 271         &scif5_device,
 272         &scif6_device,
 273         &scif7_device,
 274         &scifb_device,
 275         &cmt10_device,
 276 };
 277
 278 /* DMA */
 279 static const struct sh_dmae_slave_config r8a7740_dmae_slaves[] = {
 280         {
 281                 .slave_id       = SHDMA_SLAVE_SDHI0_TX,
 282                 .addr           = 0xe6850030,
 283                 .chcr           = CHCR_TX(XMIT_SZ_16BIT),
 284                 .mid_rid        = 0xc1,
 285         }, {
 286                 .slave_id       = SHDMA_SLAVE_SDHI0_RX,
 287                 .addr           = 0xe6850030,
 288                 .chcr           = CHCR_RX(XMIT_SZ_16BIT),
 289                 .mid_rid        = 0xc2,
 290         }, {
 291                 .slave_id       = SHDMA_SLAVE_SDHI1_TX,
 292                 .addr           = 0xe6860030,
 293                 .chcr           = CHCR_TX(XMIT_SZ_16BIT),
 294                 .mid_rid        = 0xc9,
 295         }, {
 296                 .slave_id       = SHDMA_SLAVE_SDHI1_RX,
 297                 .addr           = 0xe6860030,
 298                 .chcr           = CHCR_RX(XMIT_SZ_16BIT),
 299                 .mid_rid        = 0xca,
 300         }, {
 301                 .slave_id       = SHDMA_SLAVE_SDHI2_TX,
 302                 .addr           = 0xe6870030,
 303                 .chcr           = CHCR_TX(XMIT_SZ_16BIT),
 304                 .mid_rid        = 0xcd,
 305         }, {
 306                 .slave_id       = SHDMA_SLAVE_SDHI2_RX,
 307                 .addr           = 0xe6870030,
 308                 .chcr           = CHCR_RX(XMIT_SZ_16BIT),
 309                 .mid_rid        = 0xce,
 310         }, {
 311                 .slave_id       = SHDMA_SLAVE_FSIA_TX,
 312                 .addr           = 0xfe1f0024,
 313                 .chcr           = CHCR_TX(XMIT_SZ_32BIT),
 314                 .mid_rid        = 0xb1,
 315         }, {
 316                 .slave_id       = SHDMA_SLAVE_FSIA_RX,
 317                 .addr           = 0xfe1f0020,
 318                 .chcr           = CHCR_RX(XMIT_SZ_32BIT),
 319                 .mid_rid        = 0xb2,
 320         }, {
 321                 .slave_id       = SHDMA_SLAVE_FSIB_TX,
 322                 .addr           = 0xfe1f0064,
 323                 .chcr           = CHCR_TX(XMIT_SZ_32BIT),
 324                 .mid_rid        = 0xb5,
 325         },
 326 };
 327
 328 #define DMA_CHANNEL(a, b, c)                    \
 329 {                                               \
 330         .offset         = a,                    \
 331         .dmars          = b,                    \
 332         .dmars_bit      = c,                    \
 333         .chclr_offset   = (0x220 - 0x20) + a    \
 334 }
 335
 336 static const struct sh_dmae_channel r8a7740_dmae_channels[] = {
 337         DMA_CHANNEL(0x00, 0, 0),
 338         DMA_CHANNEL(0x10, 0, 8),
 339         DMA_CHANNEL(0x20, 4, 0),
 340         DMA_CHANNEL(0x30, 4, 8),
 341         DMA_CHANNEL(0x50, 8, 0),
 342         DMA_CHANNEL(0x60, 8, 8),
 343 };
 344
 345 static struct sh_dmae_pdata dma_platform_data = {
 346         .slave          = r8a7740_dmae_slaves,
 347         .slave_num      = ARRAY_SIZE(r8a7740_dmae_slaves),
 348         .channel        = r8a7740_dmae_channels,
 349         .channel_num    = ARRAY_SIZE(r8a7740_dmae_channels),
 350         .ts_low_shift   = TS_LOW_SHIFT,
 351         .ts_low_mask    = TS_LOW_BIT << TS_LOW_SHIFT,
 352         .ts_high_shift  = TS_HI_SHIFT,
 353         .ts_high_mask   = TS_HI_BIT << TS_HI_SHIFT,
 354         .ts_shift       = dma_ts_shift,
 355         .ts_shift_num   = ARRAY_SIZE(dma_ts_shift),
 356         .dmaor_init     = DMAOR_DME,
 357         .chclr_present  = 1,
 358 };
 359
 360 /* Resource order important! */
 361 static struct resource r8a7740_dmae0_resources[] = {
 362         {
 363                 /* Channel registers and DMAOR */
 364                 .start  = 0xfe008020,
 365                 .end    = 0xfe00828f,
 366                 .flags  = IORESOURCE_MEM,
 367         },
 368         {
 369                 /* DMARSx */
 370                 .start  = 0xfe009000,
 371                 .end    = 0xfe00900b,
 372                 .flags  = IORESOURCE_MEM,
 373         },
 374         {
 375                 .name   = "error_irq",
 376                 .start  = evt2irq(0x20c0),
 377                 .end    = evt2irq(0x20c0),
 378                 .flags  = IORESOURCE_IRQ,
 379         },
 380         {
 381                 /* IRQ for channels 0-5 */
 382                 .start  = evt2irq(0x2000),
 383                 .end    = evt2irq(0x20a0),
 384                 .flags  = IORESOURCE_IRQ,
 385         },
 386 };
 387
 388 /* Resource order important! */
 389 static struct resource r8a7740_dmae1_resources[] = {
 390         {
 391                 /* Channel registers and DMAOR */
 392                 .start  = 0xfe018020,
 393                 .end    = 0xfe01828f,
 394                 .flags  = IORESOURCE_MEM,
 395         },
 396         {
 397                 /* DMARSx */
 398                 .start  = 0xfe019000,
 399                 .end    = 0xfe01900b,
 400                 .flags  = IORESOURCE_MEM,
 401         },
 402         {
 403                 .name   = "error_irq",
 404                 .start  = evt2irq(0x21c0),
 405                 .end    = evt2irq(0x21c0),
 406                 .flags  = IORESOURCE_IRQ,
 407         },
 408         {
 409                 /* IRQ for channels 0-5 */
 410                 .start  = evt2irq(0x2100),
 411                 .end    = evt2irq(0x21a0),
 412                 .flags  = IORESOURCE_IRQ,
 413         },
 414 };
 415
 416 /* Resource order important! */
 417 static struct resource r8a7740_dmae2_resources[] = {
 418         {
 419                 /* Channel registers and DMAOR */
 420                 .start  = 0xfe028020,
 421                 .end    = 0xfe02828f,
 422                 .flags  = IORESOURCE_MEM,
 423         },
 424         {
 425                 /* DMARSx */
 426                 .start  = 0xfe029000,
 427                 .end    = 0xfe02900b,
 428                 .flags  = IORESOURCE_MEM,
 429         },
 430         {
 431                 .name   = "error_irq",
 432                 .start  = evt2irq(0x22c0),
 433                 .end    = evt2irq(0x22c0),
 434                 .flags  = IORESOURCE_IRQ,
 435         },
 436         {
 437                 /* IRQ for channels 0-5 */
 438                 .start  = evt2irq(0x2200),
 439                 .end    = evt2irq(0x22a0),
 440                 .flags  = IORESOURCE_IRQ,
 441         },
 442 };
 443
 444 static struct platform_device dma0_device = {
 445         .name           = "sh-dma-engine",
 446         .id             = 0,
 447         .resource       = r8a7740_dmae0_resources,
 448         .num_resources  = ARRAY_SIZE(r8a7740_dmae0_resources),
 449         .dev            = {
 450                 .platform_data  = &dma_platform_data,
 451         },
 452 };
 453
 454 static struct platform_device dma1_device = {
 455         .name           = "sh-dma-engine",
 456         .id             = 1,
 457         .resource       = r8a7740_dmae1_resources,
 458         .num_resources  = ARRAY_SIZE(r8a7740_dmae1_resources),
 459         .dev            = {
 460                 .platform_data  = &dma_platform_data,
 461         },
 462 };
 463
 464 static struct platform_device dma2_device = {
 465         .name           = "sh-dma-engine",
 466         .id             = 2,
 467         .resource       = r8a7740_dmae2_resources,
 468         .num_resources  = ARRAY_SIZE(r8a7740_dmae2_resources),
 469         .dev            = {
 470                 .platform_data  = &dma_platform_data,
 471         },
 472 };
 473
 474 /* USB-DMAC */
 475 static const struct sh_dmae_channel r8a7740_usb_dma_channels[] = {
 476         {
 477                 .offset = 0,
 478         }, {
 479                 .offset = 0x20,
 480         },
 481 };
 482
 483 static const struct sh_dmae_slave_config r8a7740_usb_dma_slaves[] = {
 484         {
 485                 .slave_id       = SHDMA_SLAVE_USBHS_TX,
 486                 .chcr           = USBTS_INDEX2VAL(USBTS_XMIT_SZ_8BYTE),
 487         }, {
 488                 .slave_id       = SHDMA_SLAVE_USBHS_RX,
 489                 .chcr           = USBTS_INDEX2VAL(USBTS_XMIT_SZ_8BYTE),
 490         },
 491 };
 492
 493 static struct sh_dmae_pdata usb_dma_platform_data = {
 494         .slave          = r8a7740_usb_dma_slaves,
 495         .slave_num      = ARRAY_SIZE(r8a7740_usb_dma_slaves),
 496         .channel        = r8a7740_usb_dma_channels,
 497         .channel_num    = ARRAY_SIZE(r8a7740_usb_dma_channels),
 498         .ts_low_shift   = USBTS_LOW_SHIFT,
 499         .ts_low_mask    = USBTS_LOW_BIT << USBTS_LOW_SHIFT,
 500         .ts_high_shift  = USBTS_HI_SHIFT,
 501         .ts_high_mask   = USBTS_HI_BIT << USBTS_HI_SHIFT,
 502         .ts_shift       = dma_usbts_shift,
 503         .ts_shift_num   = ARRAY_SIZE(dma_usbts_shift),
 504         .dmaor_init     = DMAOR_DME,
 505         .chcr_offset    = 0x14,
 506         .chcr_ie_bit    = 1 << 5,
 507         .dmaor_is_32bit = 1,
 508         .needs_tend_set = 1,
 509         .no_dmars       = 1,
 510         .slave_only     = 1,
 511 };
 512
 513 static struct resource r8a7740_usb_dma_resources[] = {
 514         {
 515                 /* Channel registers and DMAOR */
 516                 .start  = 0xe68a0020,
 517                 .end    = 0xe68a0064 - 1,
 518                 .flags  = IORESOURCE_MEM,
 519         },
 520         {
 521                 /* VCR/SWR/DMICR */
 522                 .start  = 0xe68a0000,
 523                 .end    = 0xe68a0014 - 1,
 524                 .flags  = IORESOURCE_MEM,
 525         },
 526         {
 527                 /* IRQ for channels */
 528                 .start  = evt2irq(0x0a00),
 529                 .end    = evt2irq(0x0a00),
 530                 .flags  = IORESOURCE_IRQ,
 531         },
 532 };
 533
 534 static struct platform_device usb_dma_device = {
 535         .name           = "sh-dma-engine",
 536         .id             = 3,
 537         .resource       = r8a7740_usb_dma_resources,
 538         .num_resources  = ARRAY_SIZE(r8a7740_usb_dma_resources),
 539         .dev            = {
 540                 .platform_data  = &usb_dma_platform_data,
 541         },
 542 };
 543
 544 /* I2C */
 545 static struct resource i2c0_resources[] = {
 546         [0] = {
 547                 .name   = "IIC0",
 548                 .start  = 0xfff20000,
 549                 .end    = 0xfff20425 - 1,
 550                 .flags  = IORESOURCE_MEM,
 551         },
 552         [1] = {
 553                 .start  = intcs_evt2irq(0xe00),
 554                 .end    = intcs_evt2irq(0xe60),
 555                 .flags  = IORESOURCE_IRQ,
 556         },
 557 };
 558
 559 static struct resource i2c1_resources[] = {
 560         [0] = {
 561                 .name   = "IIC1",
 562                 .start  = 0xe6c20000,
 563                 .end    = 0xe6c20425 - 1,
 564                 .flags  = IORESOURCE_MEM,
 565         },
 566         [1] = {
 567                 .start  = evt2irq(0x780), /* IIC1_ALI1 */
 568                 .end    = evt2irq(0x7e0), /* IIC1_DTEI1 */
 569                 .flags  = IORESOURCE_IRQ,
 570         },
 571 };
 572
 573 static struct platform_device i2c0_device = {
 574         .name           = "i2c-sh_mobile",
 575         .id             = 0,
 576         .resource       = i2c0_resources,
 577         .num_resources  = ARRAY_SIZE(i2c0_resources),
 578 };
 579
 580 static struct platform_device i2c1_device = {
 581         .name           = "i2c-sh_mobile",
 582         .id             = 1,
 583         .resource       = i2c1_resources,
 584         .num_resources  = ARRAY_SIZE(i2c1_resources),
 585 };
 586
 587 static struct resource pmu_resources[] = {
 588         [0] = {
 589                 .start  = evt2irq(0x19a0),
 590                 .end    = evt2irq(0x19a0),
 591                 .flags  = IORESOURCE_IRQ,
 592         },
 593 };
 594
 595 static struct platform_device pmu_device = {
 596         .name   = "arm-pmu",
 597         .id     = -1,
 598         .num_resources = ARRAY_SIZE(pmu_resources),
 599         .resource = pmu_resources,
 600 };
 601
 602 static struct platform_device *r8a7740_late_devices[] __initdata = {
 603         &i2c0_device,
 604         &i2c1_device,
 605         &dma0_device,
 606         &dma1_device,
 607         &dma2_device,
 608         &usb_dma_device,
 609         &pmu_device,
 610 };
 611
 612 /*
 613  * r8a7740 chip has lasting errata on MERAM buffer.
 614  * this is work-around for it.
 615  * see
 616  *      "Media RAM (MERAM)" on r8a7740 documentation
 617  */
 618 #define MEBUFCNTR       0xFE950098
 619 void r8a7740_meram_workaround(void)
 620 {
 621         void __iomem *reg;
 622
 623         reg = ioremap_nocache(MEBUFCNTR, 4);
 624         if (reg) {
 625                 iowrite32(0x01600164, reg);
 626                 iounmap(reg);
 627         }
 628 }
 629
 630 #define ICCR    0x0004
 631 #define ICSTART 0x0070
 632
 633 #define i2c_read(reg, offset)           ioread8(reg + offset)
 634 #define i2c_write(reg, offset, data)    iowrite8(data, reg + offset)
 635
 636 /*
 637  * r8a7740 chip has lasting errata on I2C I/O pad reset.
 638  * this is work-around for it.
 639  */
 640 static void r8a7740_i2c_workaround(struct platform_device *pdev)
 641 {
 642         struct resource *res;
 643         void __iomem *reg;
 644
 645         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 646         if (unlikely(!res)) {
 647                 pr_err("r8a7740 i2c workaround fail (cannot find resource)\n");
 648                 return;
 649         }
 650
 651         reg = ioremap(res->start, resource_size(res));
 652         if (unlikely(!reg)) {
 653                 pr_err("r8a7740 i2c workaround fail (cannot map IO)\n");
 654                 return;
 655         }
 656
 657         i2c_write(reg, ICCR, i2c_read(reg, ICCR) | 0x80);
 658         i2c_read(reg, ICCR); /* dummy read */
 659
 660         i2c_write(reg, ICSTART, i2c_read(reg, ICSTART) | 0x10);
 661         i2c_read(reg, ICSTART); /* dummy read */
 662
 663         udelay(10);
 664
 665         i2c_write(reg, ICCR, 0x01);
 666         i2c_write(reg, ICSTART, 0x00);
 667
 668         udelay(10);
 669
 670         i2c_write(reg, ICCR, 0x10);
 671         udelay(10);
 672         i2c_write(reg, ICCR, 0x00);
 673         udelay(10);
 674         i2c_write(reg, ICCR, 0x10);
 675         udelay(10);
 676
 677         iounmap(reg);
 678 }
 679
 680 void __init r8a7740_add_standard_devices(void)
 681 {
 682         /* I2C work-around */
 683         r8a7740_i2c_workaround(&i2c0_device);
 684         r8a7740_i2c_workaround(&i2c1_device);
 685
 686         r8a7740_init_pm_domains();
 687
 688         /* add devices */
 689         platform_add_devices(r8a7740_early_devices,
 690                             ARRAY_SIZE(r8a7740_early_devices));
 691         platform_add_devices(r8a7740_late_devices,
 692                              ARRAY_SIZE(r8a7740_late_devices));
 693
 694         /* add devices to PM domain  */
 695
 696         rmobile_add_device_to_domain("A3SP",    &scif0_device);
 697         rmobile_add_device_to_domain("A3SP",    &scif1_device);
 698         rmobile_add_device_to_domain("A3SP",    &scif2_device);
 699         rmobile_add_device_to_domain("A3SP",    &scif3_device);
 700         rmobile_add_device_to_domain("A3SP",    &scif4_device);
 701         rmobile_add_device_to_domain("A3SP",    &scif5_device);
 702         rmobile_add_device_to_domain("A3SP",    &scif6_device);
 703         rmobile_add_device_to_domain("A3SP",    &scif7_device);
 704         rmobile_add_device_to_domain("A3SP",    &scifb_device);
 705         rmobile_add_device_to_domain("A3SP",    &i2c1_device);
 706 }
 707
 708 static void __init r8a7740_earlytimer_init(void)
 709 {
 710         r8a7740_clock_init(0);
 711         shmobile_earlytimer_init();
 712 }
 713
 714 void __init r8a7740_add_early_devices(void)
 715 {
 716         early_platform_add_devices(r8a7740_early_devices,
 717                                    ARRAY_SIZE(r8a7740_early_devices));
 718
 719         /* setup early console here as well */
 720         shmobile_setup_console();
 721
 722         /* override timer setup with soc-specific code */
 723         shmobile_timer.init = r8a7740_earlytimer_init;
 724 }
 725
 726 #ifdef CONFIG_USE_OF
 727
 728 void __init r8a7740_add_early_devices_dt(void)
 729 {
 730         shmobile_setup_delay(800, 1, 3); /* Cortex-A9 @ 800MHz */
 731
 732         early_platform_add_devices(r8a7740_early_devices,
 733                                    ARRAY_SIZE(r8a7740_early_devices));
 734
 735         /* setup early console here as well */
 736         shmobile_setup_console();
 737 }
 738
 739 static const struct of_dev_auxdata r8a7740_auxdata_lookup[] __initconst = {
 740         { }
 741 };
 742
 743 void __init r8a7740_add_standard_devices_dt(void)
 744 {
 745         /* clocks are setup late during boot in the case of DT */
 746         r8a7740_clock_init(0);
 747
 748         platform_add_devices(r8a7740_early_devices,
 749                             ARRAY_SIZE(r8a7740_early_devices));
 750
 751         of_platform_populate(NULL, of_default_bus_match_table,
 752                              r8a7740_auxdata_lookup, NULL);
 753 }
 754
 755 static const char *r8a7740_boards_compat_dt[] __initdata = {
 756         "renesas,r8a7740",
 757         NULL,
 758 };
 759
 760 DT_MACHINE_START(R8A7740_DT, "Generic R8A7740 (Flattened Device Tree)")
 761         .map_io         = r8a7740_map_io,
 762         .init_early     = r8a7740_add_early_devices_dt,
 763         .init_irq       = r8a7740_init_irq,
 764         .handle_irq     = shmobile_handle_irq_intc,
 765         .init_machine   = r8a7740_add_standard_devices_dt,
 766         .timer          = &shmobile_timer,
 767         .dt_compat      = r8a7740_boards_compat_dt,
 768 MACHINE_END
 769
 770 #endif /* CONFIG_USE_OF */