drivers/mfd/tc6393xb.c

   1 /*
   2  * Toshiba TC6393XB SoC support
   3  *
   4  * Copyright(c) 2005-2006 Chris Humbert
   5  * Copyright(c) 2005 Dirk Opfer
   6  * Copyright(c) 2005 Ian Molton <spyro@f2s.com>
   7  * Copyright(c) 2007 Dmitry Baryshkov
   8  *
   9  * Based on code written by Sharp/Lineo for 2.4 kernels
  10  * Based on locomo.c
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/io.h>
  20 #include <linux/irq.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/clk.h>
  23 #include <linux/err.h>
  24 #include <linux/mfd/core.h>
  25 #include <linux/mfd/tmio.h>
  26 #include <linux/mfd/tc6393xb.h>
  27 #include <linux/gpio.h>
  28 #include <linux/slab.h>
  29
  30 #define SCR_REVID       0x08            /* b Revision ID        */
  31 #define SCR_ISR         0x50            /* b Interrupt Status   */
  32 #define SCR_IMR         0x52            /* b Interrupt Mask     */
  33 #define SCR_IRR         0x54            /* b Interrupt Routing  */
  34 #define SCR_GPER        0x60            /* w GP Enable          */
  35 #define SCR_GPI_SR(i)   (0x64 + (i))    /* b3 GPI Status        */
  36 #define SCR_GPI_IMR(i)  (0x68 + (i))    /* b3 GPI INT Mask      */
  37 #define SCR_GPI_EDER(i) (0x6c + (i))    /* b3 GPI Edge Detect Enable */
  38 #define SCR_GPI_LIR(i)  (0x70 + (i))    /* b3 GPI Level Invert  */
  39 #define SCR_GPO_DSR(i)  (0x78 + (i))    /* b3 GPO Data Set      */
  40 #define SCR_GPO_DOECR(i) (0x7c + (i))   /* b3 GPO Data OE Control */
  41 #define SCR_GP_IARCR(i) (0x80 + (i))    /* b3 GP Internal Active Register Control */
  42 #define SCR_GP_IARLCR(i) (0x84 + (i))   /* b3 GP INTERNAL Active Register Level Control */
  43 #define SCR_GPI_BCR(i)  (0x88 + (i))    /* b3 GPI Buffer Control */
  44 #define SCR_GPA_IARCR   0x8c            /* w GPa Internal Active Register Control */
  45 #define SCR_GPA_IARLCR  0x90            /* w GPa Internal Active Register Level Control */
  46 #define SCR_GPA_BCR     0x94            /* w GPa Buffer Control */
  47 #define SCR_CCR         0x98            /* w Clock Control      */
  48 #define SCR_PLL2CR      0x9a            /* w PLL2 Control       */
  49 #define SCR_PLL1CR      0x9c            /* l PLL1 Control       */
  50 #define SCR_DIARCR      0xa0            /* b Device Internal Active Register Control */
  51 #define SCR_DBOCR       0xa1            /* b Device Buffer Off Control */
  52 #define SCR_FER         0xe0            /* b Function Enable    */
  53 #define SCR_MCR         0xe4            /* w Mode Control       */
  54 #define SCR_CONFIG      0xfc            /* b Configuration Control */
  55 #define SCR_DEBUG       0xff            /* b Debug              */
  56
  57 #define SCR_CCR_CK32K   BIT(0)
  58 #define SCR_CCR_USBCK   BIT(1)
  59 #define SCR_CCR_UNK1    BIT(4)
  60 #define SCR_CCR_MCLK_MASK       (7 << 8)
  61 #define SCR_CCR_MCLK_OFF        (0 << 8)
  62 #define SCR_CCR_MCLK_12 (1 << 8)
  63 #define SCR_CCR_MCLK_24 (2 << 8)
  64 #define SCR_CCR_MCLK_48 (3 << 8)
  65 #define SCR_CCR_HCLK_MASK       (3 << 12)
  66 #define SCR_CCR_HCLK_24 (0 << 12)
  67 #define SCR_CCR_HCLK_48 (1 << 12)
  68
  69 #define SCR_FER_USBEN           BIT(0)  /* USB host enable */
  70 #define SCR_FER_LCDCVEN         BIT(1)  /* polysilicon TFT enable */
  71 #define SCR_FER_SLCDEN          BIT(2)  /* SLCD enable */
  72
  73 #define SCR_MCR_RDY_MASK                (3 << 0)
  74 #define SCR_MCR_RDY_OPENDRAIN   (0 << 0)
  75 #define SCR_MCR_RDY_TRISTATE    (1 << 0)
  76 #define SCR_MCR_RDY_PUSHPULL    (2 << 0)
  77 #define SCR_MCR_RDY_UNK         BIT(2)
  78 #define SCR_MCR_RDY_EN          BIT(3)
  79 #define SCR_MCR_INT_MASK                (3 << 4)
  80 #define SCR_MCR_INT_OPENDRAIN   (0 << 4)
  81 #define SCR_MCR_INT_TRISTATE    (1 << 4)
  82 #define SCR_MCR_INT_PUSHPULL    (2 << 4)
  83 #define SCR_MCR_INT_UNK         BIT(6)
  84 #define SCR_MCR_INT_EN          BIT(7)
  85 /* bits 8 - 16 are unknown */
  86
  87 #define TC_GPIO_BIT(i)          (1 << (i & 0x7))
  88
  89 /*--------------------------------------------------------------------------*/
  90
  91 struct tc6393xb {
  92         void __iomem            *scr;
  93
  94         struct gpio_chip        gpio;
  95
  96         struct clk              *clk; /* 3,6 Mhz */
  97
  98         spinlock_t              lock; /* protects RMW cycles */
  99
 100         struct {
 101                 u8              fer;
 102                 u16             ccr;
 103                 u8              gpi_bcr[3];
 104                 u8              gpo_dsr[3];
 105                 u8              gpo_doecr[3];
 106         } suspend_state;
 107
 108         struct resource         rscr;
 109         struct resource         *iomem;
 110         int                     irq;
 111         int                     irq_base;
 112 };
 113
 114 enum {
 115         TC6393XB_CELL_NAND,
 116         TC6393XB_CELL_MMC,
 117         TC6393XB_CELL_OHCI,
 118         TC6393XB_CELL_FB,
 119 };
 120
 121 /*--------------------------------------------------------------------------*/
 122
 123 static int tc6393xb_nand_enable(struct platform_device *nand)
 124 {
 125         struct platform_device *dev = to_platform_device(nand->dev.parent);
 126         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 127         unsigned long flags;
 128
 129         spin_lock_irqsave(&tc6393xb->lock, flags);
 130
 131         /* SMD buffer on */
 132         dev_dbg(&dev->dev, "SMD buffer on\n");
 133         tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
 134
 135         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 136
 137         return 0;
 138 }
 139
 140 static struct resource __devinitdata tc6393xb_nand_resources[] = {
 141         {
 142                 .start  = 0x1000,
 143                 .end    = 0x1007,
 144                 .flags  = IORESOURCE_MEM,
 145         },
 146         {
 147                 .start  = 0x0100,
 148                 .end    = 0x01ff,
 149                 .flags  = IORESOURCE_MEM,
 150         },
 151         {
 152                 .start  = IRQ_TC6393_NAND,
 153                 .end    = IRQ_TC6393_NAND,
 154                 .flags  = IORESOURCE_IRQ,
 155         },
 156 };
 157
 158 static struct resource tc6393xb_mmc_resources[] = {
 159         {
 160                 .start  = 0x800,
 161                 .end    = 0x9ff,
 162                 .flags  = IORESOURCE_MEM,
 163         },
 164         {
 165                 .start  = IRQ_TC6393_MMC,
 166                 .end    = IRQ_TC6393_MMC,
 167                 .flags  = IORESOURCE_IRQ,
 168         },
 169 };
 170
 171 static const struct resource tc6393xb_ohci_resources[] = {
 172         {
 173                 .start  = 0x3000,
 174                 .end    = 0x31ff,
 175                 .flags  = IORESOURCE_MEM,
 176         },
 177         {
 178                 .start  = 0x0300,
 179                 .end    = 0x03ff,
 180                 .flags  = IORESOURCE_MEM,
 181         },
 182         {
 183                 .start  = 0x010000,
 184                 .end    = 0x017fff,
 185                 .flags  = IORESOURCE_MEM,
 186         },
 187         {
 188                 .start  = 0x018000,
 189                 .end    = 0x01ffff,
 190                 .flags  = IORESOURCE_MEM,
 191         },
 192         {
 193                 .start  = IRQ_TC6393_OHCI,
 194                 .end    = IRQ_TC6393_OHCI,
 195                 .flags  = IORESOURCE_IRQ,
 196         },
 197 };
 198
 199 static struct resource __devinitdata tc6393xb_fb_resources[] = {
 200         {
 201                 .start  = 0x5000,
 202                 .end    = 0x51ff,
 203                 .flags  = IORESOURCE_MEM,
 204         },
 205         {
 206                 .start  = 0x0500,
 207                 .end    = 0x05ff,
 208                 .flags  = IORESOURCE_MEM,
 209         },
 210         {
 211                 .start  = 0x100000,
 212                 .end    = 0x1fffff,
 213                 .flags  = IORESOURCE_MEM,
 214         },
 215         {
 216                 .start  = IRQ_TC6393_FB,
 217                 .end    = IRQ_TC6393_FB,
 218                 .flags  = IORESOURCE_IRQ,
 219         },
 220 };
 221
 222 static int tc6393xb_ohci_enable(struct platform_device *dev)
 223 {
 224         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 225         unsigned long flags;
 226         u16 ccr;
 227         u8 fer;
 228
 229         spin_lock_irqsave(&tc6393xb->lock, flags);
 230
 231         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 232         ccr |= SCR_CCR_USBCK;
 233         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 234
 235         fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
 236         fer |= SCR_FER_USBEN;
 237         tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
 238
 239         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 240
 241         return 0;
 242 }
 243
 244 static int tc6393xb_ohci_disable(struct platform_device *dev)
 245 {
 246         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 247         unsigned long flags;
 248         u16 ccr;
 249         u8 fer;
 250
 251         spin_lock_irqsave(&tc6393xb->lock, flags);
 252
 253         fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
 254         fer &= ~SCR_FER_USBEN;
 255         tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
 256
 257         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 258         ccr &= ~SCR_CCR_USBCK;
 259         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 260
 261         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 262
 263         return 0;
 264 }
 265
 266 static int tc6393xb_fb_enable(struct platform_device *dev)
 267 {
 268         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 269         unsigned long flags;
 270         u16 ccr;
 271
 272         spin_lock_irqsave(&tc6393xb->lock, flags);
 273
 274         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 275         ccr &= ~SCR_CCR_MCLK_MASK;
 276         ccr |= SCR_CCR_MCLK_48;
 277         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 278
 279         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 280
 281         return 0;
 282 }
 283
 284 static int tc6393xb_fb_disable(struct platform_device *dev)
 285 {
 286         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 287         unsigned long flags;
 288         u16 ccr;
 289
 290         spin_lock_irqsave(&tc6393xb->lock, flags);
 291
 292         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 293         ccr &= ~SCR_CCR_MCLK_MASK;
 294         ccr |= SCR_CCR_MCLK_OFF;
 295         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 296
 297         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 298
 299         return 0;
 300 }
 301
 302 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
 303 {
 304         struct platform_device *dev = to_platform_device(fb->dev.parent);
 305         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 306         u8 fer;
 307         unsigned long flags;
 308
 309         spin_lock_irqsave(&tc6393xb->lock, flags);
 310
 311         fer = ioread8(tc6393xb->scr + SCR_FER);
 312         if (on)
 313                 fer |= SCR_FER_SLCDEN;
 314         else
 315                 fer &= ~SCR_FER_SLCDEN;
 316         iowrite8(fer, tc6393xb->scr + SCR_FER);
 317
 318         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 319
 320         return 0;
 321 }
 322 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
 323
 324 int tc6393xb_lcd_mode(struct platform_device *fb,
 325                                         const struct fb_videomode *mode) {
 326         struct platform_device *dev = to_platform_device(fb->dev.parent);
 327         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 328         unsigned long flags;
 329
 330         spin_lock_irqsave(&tc6393xb->lock, flags);
 331
 332         iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
 333         iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
 334
 335         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 336
 337         return 0;
 338 }
 339 EXPORT_SYMBOL(tc6393xb_lcd_mode);
 340
 341 static int tc6393xb_mmc_enable(struct platform_device *mmc)
 342 {
 343         struct platform_device *dev = to_platform_device(mmc->dev.parent);
 344         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 345
 346         tmio_core_mmc_enable(tc6393xb->scr + 0x200, 0,
 347                 tc6393xb_mmc_resources[0].start & 0xfffe);
 348
 349         return 0;
 350 }
 351
 352 static int tc6393xb_mmc_resume(struct platform_device *mmc)
 353 {
 354         struct platform_device *dev = to_platform_device(mmc->dev.parent);
 355         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 356
 357         tmio_core_mmc_resume(tc6393xb->scr + 0x200, 0,
 358                 tc6393xb_mmc_resources[0].start & 0xfffe);
 359
 360         return 0;
 361 }
 362
 363 static void tc6393xb_mmc_pwr(struct platform_device *mmc, int state)
 364 {
 365         struct platform_device *dev = to_platform_device(mmc->dev.parent);
 366         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 367
 368         tmio_core_mmc_pwr(tc6393xb->scr + 0x200, 0, state);
 369 }
 370
 371 static void tc6393xb_mmc_clk_div(struct platform_device *mmc, int state)
 372 {
 373         struct platform_device *dev = to_platform_device(mmc->dev.parent);
 374         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 375
 376         tmio_core_mmc_clk_div(tc6393xb->scr + 0x200, 0, state);
 377 }
 378
 379 static struct tmio_mmc_data tc6393xb_mmc_data = {
 380         .hclk = 24000000,
 381         .set_pwr = tc6393xb_mmc_pwr,
 382         .set_clk_div = tc6393xb_mmc_clk_div,
 383 };
 384
 385 static struct mfd_cell __devinitdata tc6393xb_cells[] = {
 386         [TC6393XB_CELL_NAND] = {
 387                 .name = "tmio-nand",
 388                 .enable = tc6393xb_nand_enable,
 389                 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
 390                 .resources = tc6393xb_nand_resources,
 391         },
 392         [TC6393XB_CELL_MMC] = {
 393                 .name = "tmio-mmc",
 394                 .enable = tc6393xb_mmc_enable,
 395                 .resume = tc6393xb_mmc_resume,
 396                 .mfd_data = &tc6393xb_mmc_data,
 397                 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
 398                 .resources = tc6393xb_mmc_resources,
 399         },
 400         [TC6393XB_CELL_OHCI] = {
 401                 .name = "tmio-ohci",
 402                 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
 403                 .resources = tc6393xb_ohci_resources,
 404                 .enable = tc6393xb_ohci_enable,
 405                 .suspend = tc6393xb_ohci_disable,
 406                 .resume = tc6393xb_ohci_enable,
 407                 .disable = tc6393xb_ohci_disable,
 408         },
 409         [TC6393XB_CELL_FB] = {
 410                 .name = "tmio-fb",
 411                 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
 412                 .resources = tc6393xb_fb_resources,
 413                 .enable = tc6393xb_fb_enable,
 414                 .suspend = tc6393xb_fb_disable,
 415                 .resume = tc6393xb_fb_enable,
 416                 .disable = tc6393xb_fb_disable,
 417         },
 418 };
 419
 420 /*--------------------------------------------------------------------------*/
 421
 422 static int tc6393xb_gpio_get(struct gpio_chip *chip,
 423                 unsigned offset)
 424 {
 425         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 426
 427         /* XXX: does dsr also represent inputs? */
 428         return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
 429                 & TC_GPIO_BIT(offset);
 430 }
 431
 432 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
 433                 unsigned offset, int value)
 434 {
 435         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 436         u8  dsr;
 437
 438         dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 439         if (value)
 440                 dsr |= TC_GPIO_BIT(offset);
 441         else
 442                 dsr &= ~TC_GPIO_BIT(offset);
 443
 444         tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 445 }
 446
 447 static void tc6393xb_gpio_set(struct gpio_chip *chip,
 448                 unsigned offset, int value)
 449 {
 450         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 451         unsigned long flags;
 452
 453         spin_lock_irqsave(&tc6393xb->lock, flags);
 454
 455         __tc6393xb_gpio_set(chip, offset, value);
 456
 457         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 458 }
 459
 460 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
 461                         unsigned offset)
 462 {
 463         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 464         unsigned long flags;
 465         u8 doecr;
 466
 467         spin_lock_irqsave(&tc6393xb->lock, flags);
 468
 469         doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 470         doecr &= ~TC_GPIO_BIT(offset);
 471         tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 472
 473         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 474
 475         return 0;
 476 }
 477
 478 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
 479                         unsigned offset, int value)
 480 {
 481         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 482         unsigned long flags;
 483         u8 doecr;
 484
 485         spin_lock_irqsave(&tc6393xb->lock, flags);
 486
 487         __tc6393xb_gpio_set(chip, offset, value);
 488
 489         doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 490         doecr |= TC_GPIO_BIT(offset);
 491         tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 492
 493         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 494
 495         return 0;
 496 }
 497
 498 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
 499 {
 500         tc6393xb->gpio.label = "tc6393xb";
 501         tc6393xb->gpio.base = gpio_base;
 502         tc6393xb->gpio.ngpio = 16;
 503         tc6393xb->gpio.set = tc6393xb_gpio_set;
 504         tc6393xb->gpio.get = tc6393xb_gpio_get;
 505         tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
 506         tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
 507
 508         return gpiochip_add(&tc6393xb->gpio);
 509 }
 510
 511 /*--------------------------------------------------------------------------*/
 512
 513 static void
 514 tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
 515 {
 516         struct tc6393xb *tc6393xb = get_irq_data(irq);
 517         unsigned int isr;
 518         unsigned int i, irq_base;
 519
 520         irq_base = tc6393xb->irq_base;
 521
 522         while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
 523                                 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
 524                 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
 525                         if (isr & (1 << i))
 526                                 generic_handle_irq(irq_base + i);
 527                 }
 528 }
 529
 530 static void tc6393xb_irq_ack(struct irq_data *data)
 531 {
 532 }
 533
 534 static void tc6393xb_irq_mask(struct irq_data *data)
 535 {
 536         struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
 537         unsigned long flags;
 538         u8 imr;
 539
 540         spin_lock_irqsave(&tc6393xb->lock, flags);
 541         imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
 542         imr |= 1 << (data->irq - tc6393xb->irq_base);
 543         tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
 544         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 545 }
 546
 547 static void tc6393xb_irq_unmask(struct irq_data *data)
 548 {
 549         struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
 550         unsigned long flags;
 551         u8 imr;
 552
 553         spin_lock_irqsave(&tc6393xb->lock, flags);
 554         imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
 555         imr &= ~(1 << (data->irq - tc6393xb->irq_base));
 556         tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
 557         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 558 }
 559
 560 static struct irq_chip tc6393xb_chip = {
 561         .name           = "tc6393xb",
 562         .irq_ack        = tc6393xb_irq_ack,
 563         .irq_mask       = tc6393xb_irq_mask,
 564         .irq_unmask     = tc6393xb_irq_unmask,
 565 };
 566
 567 static void tc6393xb_attach_irq(struct platform_device *dev)
 568 {
 569         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 570         unsigned int irq, irq_base;
 571
 572         irq_base = tc6393xb->irq_base;
 573
 574         for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
 575                 set_irq_chip(irq, &tc6393xb_chip);
 576                 set_irq_chip_data(irq, tc6393xb);
 577                 set_irq_handler(irq, handle_edge_irq);
 578                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 579         }
 580
 581         set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
 582         set_irq_data(tc6393xb->irq, tc6393xb);
 583         set_irq_chained_handler(tc6393xb->irq, tc6393xb_irq);
 584 }
 585
 586 static void tc6393xb_detach_irq(struct platform_device *dev)
 587 {
 588         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 589         unsigned int irq, irq_base;
 590
 591         set_irq_chained_handler(tc6393xb->irq, NULL);
 592         set_irq_data(tc6393xb->irq, NULL);
 593
 594         irq_base = tc6393xb->irq_base;
 595
 596         for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
 597                 set_irq_flags(irq, 0);
 598                 set_irq_chip(irq, NULL);
 599                 set_irq_chip_data(irq, NULL);
 600         }
 601 }
 602
 603 /*--------------------------------------------------------------------------*/
 604
 605 static int __devinit tc6393xb_probe(struct platform_device *dev)
 606 {
 607         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 608         struct tc6393xb *tc6393xb;
 609         struct resource *iomem, *rscr;
 610         int ret, temp;
 611
 612         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 613         if (!iomem)
 614                 return -EINVAL;
 615
 616         tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
 617         if (!tc6393xb) {
 618                 ret = -ENOMEM;
 619                 goto err_kzalloc;
 620         }
 621
 622         spin_lock_init(&tc6393xb->lock);
 623
 624         platform_set_drvdata(dev, tc6393xb);
 625
 626         ret = platform_get_irq(dev, 0);
 627         if (ret >= 0)
 628                 tc6393xb->irq = ret;
 629         else
 630                 goto err_noirq;
 631
 632         tc6393xb->iomem = iomem;
 633         tc6393xb->irq_base = tcpd->irq_base;
 634
 635         tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
 636         if (IS_ERR(tc6393xb->clk)) {
 637                 ret = PTR_ERR(tc6393xb->clk);
 638                 goto err_clk_get;
 639         }
 640
 641         rscr = &tc6393xb->rscr;
 642         rscr->name = "tc6393xb-core";
 643         rscr->start = iomem->start;
 644         rscr->end = iomem->start + 0xff;
 645         rscr->flags = IORESOURCE_MEM;
 646
 647         ret = request_resource(iomem, rscr);
 648         if (ret)
 649                 goto err_request_scr;
 650
 651         tc6393xb->scr = ioremap(rscr->start, resource_size(rscr));
 652         if (!tc6393xb->scr) {
 653                 ret = -ENOMEM;
 654                 goto err_ioremap;
 655         }
 656
 657         ret = clk_enable(tc6393xb->clk);
 658         if (ret)
 659                 goto err_clk_enable;
 660
 661         ret = tcpd->enable(dev);
 662         if (ret)
 663                 goto err_enable;
 664
 665         iowrite8(0,                             tc6393xb->scr + SCR_FER);
 666         iowrite16(tcpd->scr_pll2cr,             tc6393xb->scr + SCR_PLL2CR);
 667         iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
 668                                                 tc6393xb->scr + SCR_CCR);
 669         iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
 670                   SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
 671                   BIT(15),                      tc6393xb->scr + SCR_MCR);
 672         iowrite16(tcpd->scr_gper,               tc6393xb->scr + SCR_GPER);
 673         iowrite8(0,                             tc6393xb->scr + SCR_IRR);
 674         iowrite8(0xbf,                          tc6393xb->scr + SCR_IMR);
 675
 676         printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
 677                         tmio_ioread8(tc6393xb->scr + SCR_REVID),
 678                         (unsigned long) iomem->start, tc6393xb->irq);
 679
 680         tc6393xb->gpio.base = -1;
 681
 682         if (tcpd->gpio_base >= 0) {
 683                 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
 684                 if (ret)
 685                         goto err_gpio_add;
 686         }
 687
 688         tc6393xb_attach_irq(dev);
 689
 690         if (tcpd->setup) {
 691                 ret = tcpd->setup(dev);
 692                 if (ret)
 693                         goto err_setup;
 694         }
 695
 696         tc6393xb_cells[TC6393XB_CELL_NAND].mfd_data = tcpd->nand_data;
 697         tc6393xb_cells[TC6393XB_CELL_FB].mfd_data = tcpd->fb_data;
 698
 699         ret = mfd_add_devices(&dev->dev, dev->id,
 700                         tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
 701                         iomem, tcpd->irq_base);
 702
 703         if (!ret)
 704                 return 0;
 705
 706         if (tcpd->teardown)
 707                 tcpd->teardown(dev);
 708
 709 err_setup:
 710         tc6393xb_detach_irq(dev);
 711
 712 err_gpio_add:
 713         if (tc6393xb->gpio.base != -1)
 714                 temp = gpiochip_remove(&tc6393xb->gpio);
 715         tcpd->disable(dev);
 716 err_enable:
 717         clk_disable(tc6393xb->clk);
 718 err_clk_enable:
 719         iounmap(tc6393xb->scr);
 720 err_ioremap:
 721         release_resource(&tc6393xb->rscr);
 722 err_request_scr:
 723         clk_put(tc6393xb->clk);
 724 err_noirq:
 725 err_clk_get:
 726         kfree(tc6393xb);
 727 err_kzalloc:
 728         return ret;
 729 }
 730
 731 static int __devexit tc6393xb_remove(struct platform_device *dev)
 732 {
 733         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 734         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 735         int ret;
 736
 737         mfd_remove_devices(&dev->dev);
 738
 739         if (tcpd->teardown)
 740                 tcpd->teardown(dev);
 741
 742         tc6393xb_detach_irq(dev);
 743
 744         if (tc6393xb->gpio.base != -1) {
 745                 ret = gpiochip_remove(&tc6393xb->gpio);
 746                 if (ret) {
 747                         dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
 748                         return ret;
 749                 }
 750         }
 751
 752         ret = tcpd->disable(dev);
 753         clk_disable(tc6393xb->clk);
 754         iounmap(tc6393xb->scr);
 755         release_resource(&tc6393xb->rscr);
 756         platform_set_drvdata(dev, NULL);
 757         clk_put(tc6393xb->clk);
 758         kfree(tc6393xb);
 759
 760         return ret;
 761 }
 762
 763 #ifdef CONFIG_PM
 764 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
 765 {
 766         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 767         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 768         int i, ret;
 769
 770         tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
 771         tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
 772
 773         for (i = 0; i < 3; i++) {
 774                 tc6393xb->suspend_state.gpo_dsr[i] =
 775                         ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
 776                 tc6393xb->suspend_state.gpo_doecr[i] =
 777                         ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
 778                 tc6393xb->suspend_state.gpi_bcr[i] =
 779                         ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
 780         }
 781         ret = tcpd->suspend(dev);
 782         clk_disable(tc6393xb->clk);
 783
 784         return ret;
 785 }
 786
 787 static int tc6393xb_resume(struct platform_device *dev)
 788 {
 789         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 790         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 791         int ret;
 792         int i;
 793
 794         clk_enable(tc6393xb->clk);
 795
 796         ret = tcpd->resume(dev);
 797         if (ret)
 798                 return ret;
 799
 800         if (!tcpd->resume_restore)
 801                 return 0;
 802
 803         iowrite8(tc6393xb->suspend_state.fer,   tc6393xb->scr + SCR_FER);
 804         iowrite16(tcpd->scr_pll2cr,             tc6393xb->scr + SCR_PLL2CR);
 805         iowrite16(tc6393xb->suspend_state.ccr,  tc6393xb->scr + SCR_CCR);
 806         iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
 807                   SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
 808                   BIT(15),                      tc6393xb->scr + SCR_MCR);
 809         iowrite16(tcpd->scr_gper,               tc6393xb->scr + SCR_GPER);
 810         iowrite8(0,                             tc6393xb->scr + SCR_IRR);
 811         iowrite8(0xbf,                          tc6393xb->scr + SCR_IMR);
 812
 813         for (i = 0; i < 3; i++) {
 814                 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
 815                                         tc6393xb->scr + SCR_GPO_DSR(i));
 816                 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
 817                                         tc6393xb->scr + SCR_GPO_DOECR(i));
 818                 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
 819                                         tc6393xb->scr + SCR_GPI_BCR(i));
 820         }
 821
 822         return 0;
 823 }
 824 #else
 825 #define tc6393xb_suspend NULL
 826 #define tc6393xb_resume NULL
 827 #endif
 828
 829 static struct platform_driver tc6393xb_driver = {
 830         .probe = tc6393xb_probe,
 831         .remove = __devexit_p(tc6393xb_remove),
 832         .suspend = tc6393xb_suspend,
 833         .resume = tc6393xb_resume,
 834
 835         .driver = {
 836                 .name = "tc6393xb",
 837                 .owner = THIS_MODULE,
 838         },
 839 };
 840
 841 static int __init tc6393xb_init(void)
 842 {
 843         return platform_driver_register(&tc6393xb_driver);
 844 }
 845
 846 static void __exit tc6393xb_exit(void)
 847 {
 848         platform_driver_unregister(&tc6393xb_driver);
 849 }
 850
 851 subsys_initcall(tc6393xb_init);
 852 module_exit(tc6393xb_exit);
 853
 854 MODULE_LICENSE("GPL v2");
 855 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
 856 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
 857 MODULE_ALIAS("platform:tc6393xb");
 858