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
  29 #define SCR_REVID       0x08            /* b Revision ID        */
  30 #define SCR_ISR         0x50            /* b Interrupt Status   */
  31 #define SCR_IMR         0x52            /* b Interrupt Mask     */
  32 #define SCR_IRR         0x54            /* b Interrupt Routing  */
  33 #define SCR_GPER        0x60            /* w GP Enable          */
  34 #define SCR_GPI_SR(i)   (0x64 + (i))    /* b3 GPI Status        */
  35 #define SCR_GPI_IMR(i)  (0x68 + (i))    /* b3 GPI INT Mask      */
  36 #define SCR_GPI_EDER(i) (0x6c + (i))    /* b3 GPI Edge Detect Enable */
  37 #define SCR_GPI_LIR(i)  (0x70 + (i))    /* b3 GPI Level Invert  */
  38 #define SCR_GPO_DSR(i)  (0x78 + (i))    /* b3 GPO Data Set      */
  39 #define SCR_GPO_DOECR(i) (0x7c + (i))   /* b3 GPO Data OE Control */
  40 #define SCR_GP_IARCR(i) (0x80 + (i))    /* b3 GP Internal Active Register Control */
  41 #define SCR_GP_IARLCR(i) (0x84 + (i))   /* b3 GP INTERNAL Active Register Level Control */
  42 #define SCR_GPI_BCR(i)  (0x88 + (i))    /* b3 GPI Buffer Control */
  43 #define SCR_GPA_IARCR   0x8c            /* w GPa Internal Active Register Control */
  44 #define SCR_GPA_IARLCR  0x90            /* w GPa Internal Active Register Level Control */
  45 #define SCR_GPA_BCR     0x94            /* w GPa Buffer Control */
  46 #define SCR_CCR         0x98            /* w Clock Control      */
  47 #define SCR_PLL2CR      0x9a            /* w PLL2 Control       */
  48 #define SCR_PLL1CR      0x9c            /* l PLL1 Control       */
  49 #define SCR_DIARCR      0xa0            /* b Device Internal Active Register Control */
  50 #define SCR_DBOCR       0xa1            /* b Device Buffer Off Control */
  51 #define SCR_FER         0xe0            /* b Function Enable    */
  52 #define SCR_MCR         0xe4            /* w Mode Control       */
  53 #define SCR_CONFIG      0xfc            /* b Configuration Control */
  54 #define SCR_DEBUG       0xff            /* b Debug              */
  55
  56 #define SCR_CCR_CK32K   BIT(0)
  57 #define SCR_CCR_USBCK   BIT(1)
  58 #define SCR_CCR_UNK1    BIT(4)
  59 #define SCR_CCR_MCLK_MASK       (7 << 8)
  60 #define SCR_CCR_MCLK_OFF        (0 << 8)
  61 #define SCR_CCR_MCLK_12 (1 << 8)
  62 #define SCR_CCR_MCLK_24 (2 << 8)
  63 #define SCR_CCR_MCLK_48 (3 << 8)
  64 #define SCR_CCR_HCLK_MASK       (3 << 12)
  65 #define SCR_CCR_HCLK_24 (0 << 12)
  66 #define SCR_CCR_HCLK_48 (1 << 12)
  67
  68 #define SCR_FER_USBEN           BIT(0)  /* USB host enable */
  69 #define SCR_FER_LCDCVEN         BIT(1)  /* polysilicon TFT enable */
  70 #define SCR_FER_SLCDEN          BIT(2)  /* SLCD enable */
  71
  72 #define SCR_MCR_RDY_MASK                (3 << 0)
  73 #define SCR_MCR_RDY_OPENDRAIN   (0 << 0)
  74 #define SCR_MCR_RDY_TRISTATE    (1 << 0)
  75 #define SCR_MCR_RDY_PUSHPULL    (2 << 0)
  76 #define SCR_MCR_RDY_UNK         BIT(2)
  77 #define SCR_MCR_RDY_EN          BIT(3)
  78 #define SCR_MCR_INT_MASK                (3 << 4)
  79 #define SCR_MCR_INT_OPENDRAIN   (0 << 4)
  80 #define SCR_MCR_INT_TRISTATE    (1 << 4)
  81 #define SCR_MCR_INT_PUSHPULL    (2 << 4)
  82 #define SCR_MCR_INT_UNK         BIT(6)
  83 #define SCR_MCR_INT_EN          BIT(7)
  84 /* bits 8 - 16 are unknown */
  85
  86 #define TC_GPIO_BIT(i)          (1 << (i & 0x7))
  87
  88 /*--------------------------------------------------------------------------*/
  89
  90 struct tc6393xb {
  91         void __iomem            *scr;
  92
  93         struct gpio_chip        gpio;
  94
  95         struct clk              *clk; /* 3,6 Mhz */
  96
  97         spinlock_t              lock; /* protects RMW cycles */
  98
  99         struct {
 100                 u8              fer;
 101                 u16             ccr;
 102                 u8              gpi_bcr[3];
 103                 u8              gpo_dsr[3];
 104                 u8              gpo_doecr[3];
 105         } suspend_state;
 106
 107         struct resource         rscr;
 108         struct resource         *iomem;
 109         int                     irq;
 110         int                     irq_base;
 111 };
 112
 113 enum {
 114         TC6393XB_CELL_NAND,
 115         TC6393XB_CELL_MMC,
 116         TC6393XB_CELL_OHCI,
 117         TC6393XB_CELL_FB,
 118 };
 119
 120 /*--------------------------------------------------------------------------*/
 121
 122 static int tc6393xb_nand_enable(struct platform_device *nand)
 123 {
 124         struct platform_device *dev = to_platform_device(nand->dev.parent);
 125         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 126         unsigned long flags;
 127
 128         spin_lock_irqsave(&tc6393xb->lock, flags);
 129
 130         /* SMD buffer on */
 131         dev_dbg(&dev->dev, "SMD buffer on\n");
 132         tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
 133
 134         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 135
 136         return 0;
 137 }
 138
 139 static struct resource __devinitdata tc6393xb_nand_resources[] = {
 140         {
 141                 .start  = 0x1000,
 142                 .end    = 0x1007,
 143                 .flags  = IORESOURCE_MEM,
 144         },
 145         {
 146                 .start  = 0x0100,
 147                 .end    = 0x01ff,
 148                 .flags  = IORESOURCE_MEM,
 149         },
 150         {
 151                 .start  = IRQ_TC6393_NAND,
 152                 .end    = IRQ_TC6393_NAND,
 153                 .flags  = IORESOURCE_IRQ,
 154         },
 155 };
 156
 157 static struct resource __devinitdata tc6393xb_mmc_resources[] = {
 158         {
 159                 .start  = 0x800,
 160                 .end    = 0x9ff,
 161                 .flags  = IORESOURCE_MEM,
 162         },
 163         {
 164                 .start  = 0x200,
 165                 .end    = 0x2ff,
 166                 .flags  = IORESOURCE_MEM,
 167         },
 168         {
 169                 .start  = IRQ_TC6393_MMC,
 170                 .end    = IRQ_TC6393_MMC,
 171                 .flags  = IORESOURCE_IRQ,
 172         },
 173 };
 174
 175 static const struct resource tc6393xb_ohci_resources[] = {
 176         {
 177                 .start  = 0x3000,
 178                 .end    = 0x31ff,
 179                 .flags  = IORESOURCE_MEM,
 180         },
 181         {
 182                 .start  = 0x0300,
 183                 .end    = 0x03ff,
 184                 .flags  = IORESOURCE_MEM,
 185         },
 186         {
 187                 .start  = 0x010000,
 188                 .end    = 0x017fff,
 189                 .flags  = IORESOURCE_MEM,
 190         },
 191         {
 192                 .start  = 0x018000,
 193                 .end    = 0x01ffff,
 194                 .flags  = IORESOURCE_MEM,
 195         },
 196         {
 197                 .start  = IRQ_TC6393_OHCI,
 198                 .end    = IRQ_TC6393_OHCI,
 199                 .flags  = IORESOURCE_IRQ,
 200         },
 201 };
 202
 203 static struct resource __devinitdata tc6393xb_fb_resources[] = {
 204         {
 205                 .start  = 0x5000,
 206                 .end    = 0x51ff,
 207                 .flags  = IORESOURCE_MEM,
 208         },
 209         {
 210                 .start  = 0x0500,
 211                 .end    = 0x05ff,
 212                 .flags  = IORESOURCE_MEM,
 213         },
 214         {
 215                 .start  = 0x100000,
 216                 .end    = 0x1fffff,
 217                 .flags  = IORESOURCE_MEM,
 218         },
 219         {
 220                 .start  = IRQ_TC6393_FB,
 221                 .end    = IRQ_TC6393_FB,
 222                 .flags  = IORESOURCE_IRQ,
 223         },
 224 };
 225
 226 static int tc6393xb_ohci_enable(struct platform_device *dev)
 227 {
 228         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 229         unsigned long flags;
 230         u16 ccr;
 231         u8 fer;
 232
 233         spin_lock_irqsave(&tc6393xb->lock, flags);
 234
 235         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 236         ccr |= SCR_CCR_USBCK;
 237         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 238
 239         fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
 240         fer |= SCR_FER_USBEN;
 241         tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
 242
 243         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 244
 245         return 0;
 246 }
 247
 248 static int tc6393xb_ohci_disable(struct platform_device *dev)
 249 {
 250         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 251         unsigned long flags;
 252         u16 ccr;
 253         u8 fer;
 254
 255         spin_lock_irqsave(&tc6393xb->lock, flags);
 256
 257         fer = tmio_ioread8(tc6393xb->scr + SCR_FER);
 258         fer &= ~SCR_FER_USBEN;
 259         tmio_iowrite8(fer, tc6393xb->scr + SCR_FER);
 260
 261         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 262         ccr &= ~SCR_CCR_USBCK;
 263         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 264
 265         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 266
 267         return 0;
 268 }
 269
 270 static int tc6393xb_fb_enable(struct platform_device *dev)
 271 {
 272         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 273         unsigned long flags;
 274         u16 ccr;
 275
 276         spin_lock_irqsave(&tc6393xb->lock, flags);
 277
 278         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 279         ccr &= ~SCR_CCR_MCLK_MASK;
 280         ccr |= SCR_CCR_MCLK_48;
 281         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 282
 283         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 284
 285         return 0;
 286 }
 287
 288 static int tc6393xb_fb_disable(struct platform_device *dev)
 289 {
 290         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 291         unsigned long flags;
 292         u16 ccr;
 293
 294         spin_lock_irqsave(&tc6393xb->lock, flags);
 295
 296         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 297         ccr &= ~SCR_CCR_MCLK_MASK;
 298         ccr |= SCR_CCR_MCLK_OFF;
 299         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 300
 301         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 302
 303         return 0;
 304 }
 305
 306 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
 307 {
 308         struct platform_device *dev = to_platform_device(fb->dev.parent);
 309         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 310         u8 fer;
 311         unsigned long flags;
 312
 313         spin_lock_irqsave(&tc6393xb->lock, flags);
 314
 315         fer = ioread8(tc6393xb->scr + SCR_FER);
 316         if (on)
 317                 fer |= SCR_FER_SLCDEN;
 318         else
 319                 fer &= ~SCR_FER_SLCDEN;
 320         iowrite8(fer, tc6393xb->scr + SCR_FER);
 321
 322         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 323
 324         return 0;
 325 }
 326 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
 327
 328 int tc6393xb_lcd_mode(struct platform_device *fb,
 329                                         const struct fb_videomode *mode) {
 330         struct platform_device *dev = to_platform_device(fb->dev.parent);
 331         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 332         unsigned long flags;
 333
 334         spin_lock_irqsave(&tc6393xb->lock, flags);
 335
 336         iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
 337         iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
 338
 339         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 340
 341         return 0;
 342 }
 343 EXPORT_SYMBOL(tc6393xb_lcd_mode);
 344
 345 static struct mfd_cell __devinitdata tc6393xb_cells[] = {
 346         [TC6393XB_CELL_NAND] = {
 347                 .name = "tmio-nand",
 348                 .enable = tc6393xb_nand_enable,
 349                 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
 350                 .resources = tc6393xb_nand_resources,
 351         },
 352         [TC6393XB_CELL_MMC] = {
 353                 .name = "tmio-mmc",
 354                 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
 355                 .resources = tc6393xb_mmc_resources,
 356         },
 357         [TC6393XB_CELL_OHCI] = {
 358                 .name = "tmio-ohci",
 359                 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
 360                 .resources = tc6393xb_ohci_resources,
 361                 .enable = tc6393xb_ohci_enable,
 362                 .suspend = tc6393xb_ohci_disable,
 363                 .resume = tc6393xb_ohci_enable,
 364                 .disable = tc6393xb_ohci_disable,
 365         },
 366         [TC6393XB_CELL_FB] = {
 367                 .name = "tmio-fb",
 368                 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
 369                 .resources = tc6393xb_fb_resources,
 370                 .enable = tc6393xb_fb_enable,
 371                 .suspend = tc6393xb_fb_disable,
 372                 .resume = tc6393xb_fb_enable,
 373                 .disable = tc6393xb_fb_disable,
 374         },
 375 };
 376
 377 /*--------------------------------------------------------------------------*/
 378
 379 static int tc6393xb_gpio_get(struct gpio_chip *chip,
 380                 unsigned offset)
 381 {
 382         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 383
 384         /* XXX: does dsr also represent inputs? */
 385         return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
 386                 & TC_GPIO_BIT(offset);
 387 }
 388
 389 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
 390                 unsigned offset, int value)
 391 {
 392         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 393         u8  dsr;
 394
 395         dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 396         if (value)
 397                 dsr |= TC_GPIO_BIT(offset);
 398         else
 399                 dsr &= ~TC_GPIO_BIT(offset);
 400
 401         tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 402 }
 403
 404 static void tc6393xb_gpio_set(struct gpio_chip *chip,
 405                 unsigned offset, int value)
 406 {
 407         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 408         unsigned long flags;
 409
 410         spin_lock_irqsave(&tc6393xb->lock, flags);
 411
 412         __tc6393xb_gpio_set(chip, offset, value);
 413
 414         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 415 }
 416
 417 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
 418                         unsigned offset)
 419 {
 420         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 421         unsigned long flags;
 422         u8 doecr;
 423
 424         spin_lock_irqsave(&tc6393xb->lock, flags);
 425
 426         doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 427         doecr &= ~TC_GPIO_BIT(offset);
 428         tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 429
 430         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 431
 432         return 0;
 433 }
 434
 435 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
 436                         unsigned offset, int value)
 437 {
 438         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 439         unsigned long flags;
 440         u8 doecr;
 441
 442         spin_lock_irqsave(&tc6393xb->lock, flags);
 443
 444         __tc6393xb_gpio_set(chip, offset, value);
 445
 446         doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 447         doecr |= TC_GPIO_BIT(offset);
 448         tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 449
 450         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 451
 452         return 0;
 453 }
 454
 455 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
 456 {
 457         tc6393xb->gpio.label = "tc6393xb";
 458         tc6393xb->gpio.base = gpio_base;
 459         tc6393xb->gpio.ngpio = 16;
 460         tc6393xb->gpio.set = tc6393xb_gpio_set;
 461         tc6393xb->gpio.get = tc6393xb_gpio_get;
 462         tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
 463         tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
 464
 465         return gpiochip_add(&tc6393xb->gpio);
 466 }
 467
 468 /*--------------------------------------------------------------------------*/
 469
 470 static void
 471 tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
 472 {
 473         struct tc6393xb *tc6393xb = get_irq_data(irq);
 474         unsigned int isr;
 475         unsigned int i, irq_base;
 476
 477         irq_base = tc6393xb->irq_base;
 478
 479         while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
 480                                 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
 481                 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
 482                         if (isr & (1 << i))
 483                                 generic_handle_irq(irq_base + i);
 484                 }
 485 }
 486
 487 static void tc6393xb_irq_ack(unsigned int irq)
 488 {
 489 }
 490
 491 static void tc6393xb_irq_mask(unsigned int irq)
 492 {
 493         struct tc6393xb *tc6393xb = get_irq_chip_data(irq);
 494         unsigned long flags;
 495         u8 imr;
 496
 497         spin_lock_irqsave(&tc6393xb->lock, flags);
 498         imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
 499         imr |= 1 << (irq - tc6393xb->irq_base);
 500         tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
 501         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 502 }
 503
 504 static void tc6393xb_irq_unmask(unsigned int irq)
 505 {
 506         struct tc6393xb *tc6393xb = get_irq_chip_data(irq);
 507         unsigned long flags;
 508         u8 imr;
 509
 510         spin_lock_irqsave(&tc6393xb->lock, flags);
 511         imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
 512         imr &= ~(1 << (irq - tc6393xb->irq_base));
 513         tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
 514         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 515 }
 516
 517 static struct irq_chip tc6393xb_chip = {
 518         .name   = "tc6393xb",
 519         .ack    = tc6393xb_irq_ack,
 520         .mask   = tc6393xb_irq_mask,
 521         .unmask = tc6393xb_irq_unmask,
 522 };
 523
 524 static void tc6393xb_attach_irq(struct platform_device *dev)
 525 {
 526         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 527         unsigned int irq, irq_base;
 528
 529         irq_base = tc6393xb->irq_base;
 530
 531         for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
 532                 set_irq_chip(irq, &tc6393xb_chip);
 533                 set_irq_chip_data(irq, tc6393xb);
 534                 set_irq_handler(irq, handle_edge_irq);
 535                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 536         }
 537
 538         set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
 539         set_irq_data(tc6393xb->irq, tc6393xb);
 540         set_irq_chained_handler(tc6393xb->irq, tc6393xb_irq);
 541 }
 542
 543 static void tc6393xb_detach_irq(struct platform_device *dev)
 544 {
 545         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 546         unsigned int irq, irq_base;
 547
 548         set_irq_chained_handler(tc6393xb->irq, NULL);
 549         set_irq_data(tc6393xb->irq, NULL);
 550
 551         irq_base = tc6393xb->irq_base;
 552
 553         for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
 554                 set_irq_flags(irq, 0);
 555                 set_irq_chip(irq, NULL);
 556                 set_irq_chip_data(irq, NULL);
 557         }
 558 }
 559
 560 /*--------------------------------------------------------------------------*/
 561
 562 static int __devinit tc6393xb_probe(struct platform_device *dev)
 563 {
 564         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 565         struct tc6393xb *tc6393xb;
 566         struct resource *iomem, *rscr;
 567         int ret, temp;
 568
 569         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 570         if (!iomem)
 571                 return -EINVAL;
 572
 573         tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
 574         if (!tc6393xb) {
 575                 ret = -ENOMEM;
 576                 goto err_kzalloc;
 577         }
 578
 579         spin_lock_init(&tc6393xb->lock);
 580
 581         platform_set_drvdata(dev, tc6393xb);
 582
 583         ret = platform_get_irq(dev, 0);
 584         if (ret >= 0)
 585                 tc6393xb->irq = ret;
 586         else
 587                 goto err_noirq;
 588
 589         tc6393xb->iomem = iomem;
 590         tc6393xb->irq_base = tcpd->irq_base;
 591
 592         tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
 593         if (IS_ERR(tc6393xb->clk)) {
 594                 ret = PTR_ERR(tc6393xb->clk);
 595                 goto err_clk_get;
 596         }
 597
 598         rscr = &tc6393xb->rscr;
 599         rscr->name = "tc6393xb-core";
 600         rscr->start = iomem->start;
 601         rscr->end = iomem->start + 0xff;
 602         rscr->flags = IORESOURCE_MEM;
 603
 604         ret = request_resource(iomem, rscr);
 605         if (ret)
 606                 goto err_request_scr;
 607
 608         tc6393xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
 609         if (!tc6393xb->scr) {
 610                 ret = -ENOMEM;
 611                 goto err_ioremap;
 612         }
 613
 614         ret = clk_enable(tc6393xb->clk);
 615         if (ret)
 616                 goto err_clk_enable;
 617
 618         ret = tcpd->enable(dev);
 619         if (ret)
 620                 goto err_enable;
 621
 622         iowrite8(0,                             tc6393xb->scr + SCR_FER);
 623         iowrite16(tcpd->scr_pll2cr,             tc6393xb->scr + SCR_PLL2CR);
 624         iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
 625                                                 tc6393xb->scr + SCR_CCR);
 626         iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
 627                   SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
 628                   BIT(15),                      tc6393xb->scr + SCR_MCR);
 629         iowrite16(tcpd->scr_gper,               tc6393xb->scr + SCR_GPER);
 630         iowrite8(0,                             tc6393xb->scr + SCR_IRR);
 631         iowrite8(0xbf,                          tc6393xb->scr + SCR_IMR);
 632
 633         printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
 634                         tmio_ioread8(tc6393xb->scr + SCR_REVID),
 635                         (unsigned long) iomem->start, tc6393xb->irq);
 636
 637         tc6393xb->gpio.base = -1;
 638
 639         if (tcpd->gpio_base >= 0) {
 640                 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
 641                 if (ret)
 642                         goto err_gpio_add;
 643         }
 644
 645         tc6393xb_attach_irq(dev);
 646
 647         if (tcpd->setup) {
 648                 ret = tcpd->setup(dev);
 649                 if (ret)
 650                         goto err_setup;
 651         }
 652
 653         tc6393xb_cells[TC6393XB_CELL_NAND].driver_data = tcpd->nand_data;
 654         tc6393xb_cells[TC6393XB_CELL_NAND].platform_data =
 655                 &tc6393xb_cells[TC6393XB_CELL_NAND];
 656         tc6393xb_cells[TC6393XB_CELL_NAND].data_size =
 657                 sizeof(tc6393xb_cells[TC6393XB_CELL_NAND]);
 658
 659         tc6393xb_cells[TC6393XB_CELL_MMC].platform_data =
 660                 &tc6393xb_cells[TC6393XB_CELL_MMC];
 661         tc6393xb_cells[TC6393XB_CELL_MMC].data_size =
 662                 sizeof(tc6393xb_cells[TC6393XB_CELL_MMC]);
 663
 664         tc6393xb_cells[TC6393XB_CELL_OHCI].platform_data =
 665                 &tc6393xb_cells[TC6393XB_CELL_OHCI];
 666         tc6393xb_cells[TC6393XB_CELL_OHCI].data_size =
 667                 sizeof(tc6393xb_cells[TC6393XB_CELL_OHCI]);
 668
 669         tc6393xb_cells[TC6393XB_CELL_FB].driver_data = tcpd->fb_data;
 670         tc6393xb_cells[TC6393XB_CELL_FB].platform_data =
 671                 &tc6393xb_cells[TC6393XB_CELL_FB];
 672         tc6393xb_cells[TC6393XB_CELL_FB].data_size =
 673                 sizeof(tc6393xb_cells[TC6393XB_CELL_FB]);
 674
 675         ret = mfd_add_devices(&dev->dev, dev->id,
 676                         tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
 677                         iomem, tcpd->irq_base);
 678
 679         if (!ret)
 680                 return 0;
 681
 682         if (tcpd->teardown)
 683                 tcpd->teardown(dev);
 684
 685 err_setup:
 686         tc6393xb_detach_irq(dev);
 687
 688 err_gpio_add:
 689         if (tc6393xb->gpio.base != -1)
 690                 temp = gpiochip_remove(&tc6393xb->gpio);
 691         tcpd->disable(dev);
 692 err_clk_enable:
 693         clk_disable(tc6393xb->clk);
 694 err_enable:
 695         iounmap(tc6393xb->scr);
 696 err_ioremap:
 697         release_resource(&tc6393xb->rscr);
 698 err_request_scr:
 699         clk_put(tc6393xb->clk);
 700 err_noirq:
 701 err_clk_get:
 702         kfree(tc6393xb);
 703 err_kzalloc:
 704         return ret;
 705 }
 706
 707 static int __devexit tc6393xb_remove(struct platform_device *dev)
 708 {
 709         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 710         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 711         int ret;
 712
 713         mfd_remove_devices(&dev->dev);
 714
 715         if (tcpd->teardown)
 716                 tcpd->teardown(dev);
 717
 718         tc6393xb_detach_irq(dev);
 719
 720         if (tc6393xb->gpio.base != -1) {
 721                 ret = gpiochip_remove(&tc6393xb->gpio);
 722                 if (ret) {
 723                         dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
 724                         return ret;
 725                 }
 726         }
 727
 728         ret = tcpd->disable(dev);
 729         clk_disable(tc6393xb->clk);
 730         iounmap(tc6393xb->scr);
 731         release_resource(&tc6393xb->rscr);
 732         platform_set_drvdata(dev, NULL);
 733         clk_put(tc6393xb->clk);
 734         kfree(tc6393xb);
 735
 736         return ret;
 737 }
 738
 739 #ifdef CONFIG_PM
 740 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
 741 {
 742         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 743         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 744         int i, ret;
 745
 746         tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
 747         tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
 748
 749         for (i = 0; i < 3; i++) {
 750                 tc6393xb->suspend_state.gpo_dsr[i] =
 751                         ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
 752                 tc6393xb->suspend_state.gpo_doecr[i] =
 753                         ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
 754                 tc6393xb->suspend_state.gpi_bcr[i] =
 755                         ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
 756         }
 757         ret = tcpd->suspend(dev);
 758         clk_disable(tc6393xb->clk);
 759
 760         return ret;
 761 }
 762
 763 static int tc6393xb_resume(struct platform_device *dev)
 764 {
 765         struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
 766         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 767         int ret;
 768         int i;
 769
 770         clk_enable(tc6393xb->clk);
 771
 772         ret = tcpd->resume(dev);
 773         if (ret)
 774                 return ret;
 775
 776         if (!tcpd->resume_restore)
 777                 return 0;
 778
 779         iowrite8(tc6393xb->suspend_state.fer,   tc6393xb->scr + SCR_FER);
 780         iowrite16(tcpd->scr_pll2cr,             tc6393xb->scr + SCR_PLL2CR);
 781         iowrite16(tc6393xb->suspend_state.ccr,  tc6393xb->scr + SCR_CCR);
 782         iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
 783                   SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
 784                   BIT(15),                      tc6393xb->scr + SCR_MCR);
 785         iowrite16(tcpd->scr_gper,               tc6393xb->scr + SCR_GPER);
 786         iowrite8(0,                             tc6393xb->scr + SCR_IRR);
 787         iowrite8(0xbf,                          tc6393xb->scr + SCR_IMR);
 788
 789         for (i = 0; i < 3; i++) {
 790                 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
 791                                         tc6393xb->scr + SCR_GPO_DSR(i));
 792                 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
 793                                         tc6393xb->scr + SCR_GPO_DOECR(i));
 794                 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
 795                                         tc6393xb->scr + SCR_GPI_BCR(i));
 796         }
 797
 798         return 0;
 799 }
 800 #else
 801 #define tc6393xb_suspend NULL
 802 #define tc6393xb_resume NULL
 803 #endif
 804
 805 static struct platform_driver tc6393xb_driver = {
 806         .probe = tc6393xb_probe,
 807         .remove = __devexit_p(tc6393xb_remove),
 808         .suspend = tc6393xb_suspend,
 809         .resume = tc6393xb_resume,
 810
 811         .driver = {
 812                 .name = "tc6393xb",
 813                 .owner = THIS_MODULE,
 814         },
 815 };
 816
 817 static int __init tc6393xb_init(void)
 818 {
 819         return platform_driver_register(&tc6393xb_driver);
 820 }
 821
 822 static void __exit tc6393xb_exit(void)
 823 {
 824         platform_driver_unregister(&tc6393xb_driver);
 825 }
 826
 827 subsys_initcall(tc6393xb_init);
 828 module_exit(tc6393xb_exit);
 829
 830 MODULE_LICENSE("GPL v2");
 831 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
 832 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
 833 MODULE_ALIAS("platform:tc6393xb");