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 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 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_ohci_suspend(struct platform_device *dev)
 267 {
 268         struct tc6393xb_platform_data *tcpd = dev_get_platdata(dev->dev.parent);
 269
 270         /* We can't properly store/restore OHCI state, so fail here */
 271         if (tcpd->resume_restore)
 272                 return -EBUSY;
 273
 274         return tc6393xb_ohci_disable(dev);
 275 }
 276
 277 static int tc6393xb_fb_enable(struct platform_device *dev)
 278 {
 279         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 280         unsigned long flags;
 281         u16 ccr;
 282
 283         spin_lock_irqsave(&tc6393xb->lock, flags);
 284
 285         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 286         ccr &= ~SCR_CCR_MCLK_MASK;
 287         ccr |= SCR_CCR_MCLK_48;
 288         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 289
 290         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 291
 292         return 0;
 293 }
 294
 295 static int tc6393xb_fb_disable(struct platform_device *dev)
 296 {
 297         struct tc6393xb *tc6393xb = dev_get_drvdata(dev->dev.parent);
 298         unsigned long flags;
 299         u16 ccr;
 300
 301         spin_lock_irqsave(&tc6393xb->lock, flags);
 302
 303         ccr = tmio_ioread16(tc6393xb->scr + SCR_CCR);
 304         ccr &= ~SCR_CCR_MCLK_MASK;
 305         ccr |= SCR_CCR_MCLK_OFF;
 306         tmio_iowrite16(ccr, tc6393xb->scr + SCR_CCR);
 307
 308         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 309
 310         return 0;
 311 }
 312
 313 int tc6393xb_lcd_set_power(struct platform_device *fb, bool on)
 314 {
 315         struct platform_device *dev = to_platform_device(fb->dev.parent);
 316         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 317         u8 fer;
 318         unsigned long flags;
 319
 320         spin_lock_irqsave(&tc6393xb->lock, flags);
 321
 322         fer = ioread8(tc6393xb->scr + SCR_FER);
 323         if (on)
 324                 fer |= SCR_FER_SLCDEN;
 325         else
 326                 fer &= ~SCR_FER_SLCDEN;
 327         iowrite8(fer, tc6393xb->scr + SCR_FER);
 328
 329         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 330
 331         return 0;
 332 }
 333 EXPORT_SYMBOL(tc6393xb_lcd_set_power);
 334
 335 int tc6393xb_lcd_mode(struct platform_device *fb,
 336                                         const struct fb_videomode *mode) {
 337         struct platform_device *dev = to_platform_device(fb->dev.parent);
 338         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 339         unsigned long flags;
 340
 341         spin_lock_irqsave(&tc6393xb->lock, flags);
 342
 343         iowrite16(mode->pixclock, tc6393xb->scr + SCR_PLL1CR + 0);
 344         iowrite16(mode->pixclock >> 16, tc6393xb->scr + SCR_PLL1CR + 2);
 345
 346         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 347
 348         return 0;
 349 }
 350 EXPORT_SYMBOL(tc6393xb_lcd_mode);
 351
 352 static int tc6393xb_mmc_enable(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_enable(tc6393xb->scr + 0x200, 0,
 358                 tc6393xb_mmc_resources[0].start & 0xfffe);
 359
 360         return 0;
 361 }
 362
 363 static int tc6393xb_mmc_resume(struct platform_device *mmc)
 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_resume(tc6393xb->scr + 0x200, 0,
 369                 tc6393xb_mmc_resources[0].start & 0xfffe);
 370
 371         return 0;
 372 }
 373
 374 static void tc6393xb_mmc_pwr(struct platform_device *mmc, int state)
 375 {
 376         struct platform_device *dev = to_platform_device(mmc->dev.parent);
 377         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 378
 379         tmio_core_mmc_pwr(tc6393xb->scr + 0x200, 0, state);
 380 }
 381
 382 static void tc6393xb_mmc_clk_div(struct platform_device *mmc, int state)
 383 {
 384         struct platform_device *dev = to_platform_device(mmc->dev.parent);
 385         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 386
 387         tmio_core_mmc_clk_div(tc6393xb->scr + 0x200, 0, state);
 388 }
 389
 390 static struct tmio_mmc_data tc6393xb_mmc_data = {
 391         .hclk = 24000000,
 392         .set_pwr = tc6393xb_mmc_pwr,
 393         .set_clk_div = tc6393xb_mmc_clk_div,
 394 };
 395
 396 static struct mfd_cell tc6393xb_cells[] = {
 397         [TC6393XB_CELL_NAND] = {
 398                 .name = "tmio-nand",
 399                 .enable = tc6393xb_nand_enable,
 400                 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
 401                 .resources = tc6393xb_nand_resources,
 402         },
 403         [TC6393XB_CELL_MMC] = {
 404                 .name = "tmio-mmc",
 405                 .enable = tc6393xb_mmc_enable,
 406                 .resume = tc6393xb_mmc_resume,
 407                 .platform_data = &tc6393xb_mmc_data,
 408                 .pdata_size    = sizeof(tc6393xb_mmc_data),
 409                 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
 410                 .resources = tc6393xb_mmc_resources,
 411         },
 412         [TC6393XB_CELL_OHCI] = {
 413                 .name = "tmio-ohci",
 414                 .num_resources = ARRAY_SIZE(tc6393xb_ohci_resources),
 415                 .resources = tc6393xb_ohci_resources,
 416                 .enable = tc6393xb_ohci_enable,
 417                 .suspend = tc6393xb_ohci_suspend,
 418                 .resume = tc6393xb_ohci_enable,
 419                 .disable = tc6393xb_ohci_disable,
 420         },
 421         [TC6393XB_CELL_FB] = {
 422                 .name = "tmio-fb",
 423                 .num_resources = ARRAY_SIZE(tc6393xb_fb_resources),
 424                 .resources = tc6393xb_fb_resources,
 425                 .enable = tc6393xb_fb_enable,
 426                 .suspend = tc6393xb_fb_disable,
 427                 .resume = tc6393xb_fb_enable,
 428                 .disable = tc6393xb_fb_disable,
 429         },
 430 };
 431
 432 /*--------------------------------------------------------------------------*/
 433
 434 static int tc6393xb_gpio_get(struct gpio_chip *chip,
 435                 unsigned offset)
 436 {
 437         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 438
 439         /* XXX: does dsr also represent inputs? */
 440         return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
 441                 & TC_GPIO_BIT(offset);
 442 }
 443
 444 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
 445                 unsigned offset, int value)
 446 {
 447         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 448         u8  dsr;
 449
 450         dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 451         if (value)
 452                 dsr |= TC_GPIO_BIT(offset);
 453         else
 454                 dsr &= ~TC_GPIO_BIT(offset);
 455
 456         tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
 457 }
 458
 459 static void tc6393xb_gpio_set(struct gpio_chip *chip,
 460                 unsigned offset, int value)
 461 {
 462         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 463         unsigned long flags;
 464
 465         spin_lock_irqsave(&tc6393xb->lock, flags);
 466
 467         __tc6393xb_gpio_set(chip, offset, value);
 468
 469         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 470 }
 471
 472 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
 473                         unsigned offset)
 474 {
 475         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 476         unsigned long flags;
 477         u8 doecr;
 478
 479         spin_lock_irqsave(&tc6393xb->lock, flags);
 480
 481         doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 482         doecr &= ~TC_GPIO_BIT(offset);
 483         tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 484
 485         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 486
 487         return 0;
 488 }
 489
 490 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
 491                         unsigned offset, int value)
 492 {
 493         struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
 494         unsigned long flags;
 495         u8 doecr;
 496
 497         spin_lock_irqsave(&tc6393xb->lock, flags);
 498
 499         __tc6393xb_gpio_set(chip, offset, value);
 500
 501         doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 502         doecr |= TC_GPIO_BIT(offset);
 503         tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
 504
 505         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 506
 507         return 0;
 508 }
 509
 510 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
 511 {
 512         tc6393xb->gpio.label = "tc6393xb";
 513         tc6393xb->gpio.base = gpio_base;
 514         tc6393xb->gpio.ngpio = 16;
 515         tc6393xb->gpio.set = tc6393xb_gpio_set;
 516         tc6393xb->gpio.get = tc6393xb_gpio_get;
 517         tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
 518         tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
 519
 520         return gpiochip_add(&tc6393xb->gpio);
 521 }
 522
 523 /*--------------------------------------------------------------------------*/
 524
 525 static void
 526 tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
 527 {
 528         struct tc6393xb *tc6393xb = irq_desc_get_handler_data(desc);
 529         unsigned int isr;
 530         unsigned int i, irq_base;
 531
 532         irq_base = tc6393xb->irq_base;
 533
 534         while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
 535                                 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
 536                 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
 537                         if (isr & (1 << i))
 538                                 generic_handle_irq(irq_base + i);
 539                 }
 540 }
 541
 542 static void tc6393xb_irq_ack(struct irq_data *data)
 543 {
 544 }
 545
 546 static void tc6393xb_irq_mask(struct irq_data *data)
 547 {
 548         struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
 549         unsigned long flags;
 550         u8 imr;
 551
 552         spin_lock_irqsave(&tc6393xb->lock, flags);
 553         imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
 554         imr |= 1 << (data->irq - tc6393xb->irq_base);
 555         tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
 556         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 557 }
 558
 559 static void tc6393xb_irq_unmask(struct irq_data *data)
 560 {
 561         struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data);
 562         unsigned long flags;
 563         u8 imr;
 564
 565         spin_lock_irqsave(&tc6393xb->lock, flags);
 566         imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
 567         imr &= ~(1 << (data->irq - tc6393xb->irq_base));
 568         tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
 569         spin_unlock_irqrestore(&tc6393xb->lock, flags);
 570 }
 571
 572 static struct irq_chip tc6393xb_chip = {
 573         .name           = "tc6393xb",
 574         .irq_ack        = tc6393xb_irq_ack,
 575         .irq_mask       = tc6393xb_irq_mask,
 576         .irq_unmask     = tc6393xb_irq_unmask,
 577 };
 578
 579 static void tc6393xb_attach_irq(struct platform_device *dev)
 580 {
 581         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 582         unsigned int irq, irq_base;
 583
 584         irq_base = tc6393xb->irq_base;
 585
 586         for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
 587                 irq_set_chip_and_handler(irq, &tc6393xb_chip, handle_edge_irq);
 588                 irq_set_chip_data(irq, tc6393xb);
 589                 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
 590         }
 591
 592         irq_set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
 593         irq_set_chained_handler_and_data(tc6393xb->irq, tc6393xb_irq,
 594                                          tc6393xb);
 595 }
 596
 597 static void tc6393xb_detach_irq(struct platform_device *dev)
 598 {
 599         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 600         unsigned int irq, irq_base;
 601
 602         irq_set_chained_handler_and_data(tc6393xb->irq, NULL, NULL);
 603
 604         irq_base = tc6393xb->irq_base;
 605
 606         for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
 607                 irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
 608                 irq_set_chip(irq, NULL);
 609                 irq_set_chip_data(irq, NULL);
 610         }
 611 }
 612
 613 /*--------------------------------------------------------------------------*/
 614
 615 static int tc6393xb_probe(struct platform_device *dev)
 616 {
 617         struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
 618         struct tc6393xb *tc6393xb;
 619         struct resource *iomem, *rscr;
 620         int ret;
 621
 622         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 623         if (!iomem)
 624                 return -EINVAL;
 625
 626         tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
 627         if (!tc6393xb) {
 628                 ret = -ENOMEM;
 629                 goto err_kzalloc;
 630         }
 631
 632         spin_lock_init(&tc6393xb->lock);
 633
 634         platform_set_drvdata(dev, tc6393xb);
 635
 636         ret = platform_get_irq(dev, 0);
 637         if (ret >= 0)
 638                 tc6393xb->irq = ret;
 639         else
 640                 goto err_noirq;
 641
 642         tc6393xb->iomem = iomem;
 643         tc6393xb->irq_base = tcpd->irq_base;
 644
 645         tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
 646         if (IS_ERR(tc6393xb->clk)) {
 647                 ret = PTR_ERR(tc6393xb->clk);
 648                 goto err_clk_get;
 649         }
 650
 651         rscr = &tc6393xb->rscr;
 652         rscr->name = "tc6393xb-core";
 653         rscr->start = iomem->start;
 654         rscr->end = iomem->start + 0xff;
 655         rscr->flags = IORESOURCE_MEM;
 656
 657         ret = request_resource(iomem, rscr);
 658         if (ret)
 659                 goto err_request_scr;
 660
 661         tc6393xb->scr = ioremap(rscr->start, resource_size(rscr));
 662         if (!tc6393xb->scr) {
 663                 ret = -ENOMEM;
 664                 goto err_ioremap;
 665         }
 666
 667         ret = clk_prepare_enable(tc6393xb->clk);
 668         if (ret)
 669                 goto err_clk_enable;
 670
 671         ret = tcpd->enable(dev);
 672         if (ret)
 673                 goto err_enable;
 674
 675         iowrite8(0,                             tc6393xb->scr + SCR_FER);
 676         iowrite16(tcpd->scr_pll2cr,             tc6393xb->scr + SCR_PLL2CR);
 677         iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48,
 678                                                 tc6393xb->scr + SCR_CCR);
 679         iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
 680                   SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
 681                   BIT(15),                      tc6393xb->scr + SCR_MCR);
 682         iowrite16(tcpd->scr_gper,               tc6393xb->scr + SCR_GPER);
 683         iowrite8(0,                             tc6393xb->scr + SCR_IRR);
 684         iowrite8(0xbf,                          tc6393xb->scr + SCR_IMR);
 685
 686         printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
 687                         tmio_ioread8(tc6393xb->scr + SCR_REVID),
 688                         (unsigned long) iomem->start, tc6393xb->irq);
 689
 690         tc6393xb->gpio.base = -1;
 691
 692         if (tcpd->gpio_base >= 0) {
 693                 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
 694                 if (ret)
 695                         goto err_gpio_add;
 696         }
 697
 698         tc6393xb_attach_irq(dev);
 699
 700         if (tcpd->setup) {
 701                 ret = tcpd->setup(dev);
 702                 if (ret)
 703                         goto err_setup;
 704         }
 705
 706         tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = tcpd->nand_data;
 707         tc6393xb_cells[TC6393XB_CELL_NAND].pdata_size =
 708                                                 sizeof(*tcpd->nand_data);
 709         tc6393xb_cells[TC6393XB_CELL_FB].platform_data = tcpd->fb_data;
 710         tc6393xb_cells[TC6393XB_CELL_FB].pdata_size = sizeof(*tcpd->fb_data);
 711
 712         ret = mfd_add_devices(&dev->dev, dev->id,
 713                               tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
 714                               iomem, tcpd->irq_base, NULL);
 715
 716         if (!ret)
 717                 return 0;
 718
 719         if (tcpd->teardown)
 720                 tcpd->teardown(dev);
 721
 722 err_setup:
 723         tc6393xb_detach_irq(dev);
 724
 725 err_gpio_add:
 726         if (tc6393xb->gpio.base != -1)
 727                 gpiochip_remove(&tc6393xb->gpio);
 728         tcpd->disable(dev);
 729 err_enable:
 730         clk_disable_unprepare(tc6393xb->clk);
 731 err_clk_enable:
 732         iounmap(tc6393xb->scr);
 733 err_ioremap:
 734         release_resource(&tc6393xb->rscr);
 735 err_request_scr:
 736         clk_put(tc6393xb->clk);
 737 err_noirq:
 738 err_clk_get:
 739         kfree(tc6393xb);
 740 err_kzalloc:
 741         return ret;
 742 }
 743
 744 static int tc6393xb_remove(struct platform_device *dev)
 745 {
 746         struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
 747         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 748         int ret;
 749
 750         mfd_remove_devices(&dev->dev);
 751
 752         if (tcpd->teardown)
 753                 tcpd->teardown(dev);
 754
 755         tc6393xb_detach_irq(dev);
 756
 757         if (tc6393xb->gpio.base != -1)
 758                 gpiochip_remove(&tc6393xb->gpio);
 759
 760         ret = tcpd->disable(dev);
 761         clk_disable_unprepare(tc6393xb->clk);
 762         iounmap(tc6393xb->scr);
 763         release_resource(&tc6393xb->rscr);
 764         clk_put(tc6393xb->clk);
 765         kfree(tc6393xb);
 766
 767         return ret;
 768 }
 769
 770 #ifdef CONFIG_PM
 771 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
 772 {
 773         struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
 774         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 775         int i, ret;
 776
 777         tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
 778         tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
 779
 780         for (i = 0; i < 3; i++) {
 781                 tc6393xb->suspend_state.gpo_dsr[i] =
 782                         ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
 783                 tc6393xb->suspend_state.gpo_doecr[i] =
 784                         ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
 785                 tc6393xb->suspend_state.gpi_bcr[i] =
 786                         ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
 787         }
 788         ret = tcpd->suspend(dev);
 789         clk_disable_unprepare(tc6393xb->clk);
 790
 791         return ret;
 792 }
 793
 794 static int tc6393xb_resume(struct platform_device *dev)
 795 {
 796         struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev);
 797         struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
 798         int ret;
 799         int i;
 800
 801         clk_prepare_enable(tc6393xb->clk);
 802
 803         ret = tcpd->resume(dev);
 804         if (ret)
 805                 return ret;
 806
 807         if (!tcpd->resume_restore)
 808                 return 0;
 809
 810         iowrite8(tc6393xb->suspend_state.fer,   tc6393xb->scr + SCR_FER);
 811         iowrite16(tcpd->scr_pll2cr,             tc6393xb->scr + SCR_PLL2CR);
 812         iowrite16(tc6393xb->suspend_state.ccr,  tc6393xb->scr + SCR_CCR);
 813         iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
 814                   SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
 815                   BIT(15),                      tc6393xb->scr + SCR_MCR);
 816         iowrite16(tcpd->scr_gper,               tc6393xb->scr + SCR_GPER);
 817         iowrite8(0,                             tc6393xb->scr + SCR_IRR);
 818         iowrite8(0xbf,                          tc6393xb->scr + SCR_IMR);
 819
 820         for (i = 0; i < 3; i++) {
 821                 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
 822                                         tc6393xb->scr + SCR_GPO_DSR(i));
 823                 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
 824                                         tc6393xb->scr + SCR_GPO_DOECR(i));
 825                 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
 826                                         tc6393xb->scr + SCR_GPI_BCR(i));
 827         }
 828
 829         return 0;
 830 }
 831 #else
 832 #define tc6393xb_suspend NULL
 833 #define tc6393xb_resume NULL
 834 #endif
 835
 836 static struct platform_driver tc6393xb_driver = {
 837         .probe = tc6393xb_probe,
 838         .remove = tc6393xb_remove,
 839         .suspend = tc6393xb_suspend,
 840         .resume = tc6393xb_resume,
 841
 842         .driver = {
 843                 .name = "tc6393xb",
 844         },
 845 };
 846
 847 static int __init tc6393xb_init(void)
 848 {
 849         return platform_driver_register(&tc6393xb_driver);
 850 }
 851
 852 static void __exit tc6393xb_exit(void)
 853 {
 854         platform_driver_unregister(&tc6393xb_driver);
 855 }
 856
 857 subsys_initcall(tc6393xb_init);
 858 module_exit(tc6393xb_exit);
 859
 860 MODULE_LICENSE("GPL v2");
 861 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
 862 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
 863 MODULE_ALIAS("platform:tc6393xb");
 864