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 91struct 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 114enum { 115 TC6393XB_CELL_NAND, 116 TC6393XB_CELL_MMC, 117 TC6393XB_CELL_OHCI, 118 TC6393XB_CELL_FB, 119}; 120 121/*--------------------------------------------------------------------------*/ 122 123static 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 140static 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 158static 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 171static 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 199static 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 222static 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 244static 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 266static 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 277static 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 295static 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 313int 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} 333EXPORT_SYMBOL(tc6393xb_lcd_set_power); 334 335int 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} 350EXPORT_SYMBOL(tc6393xb_lcd_mode); 351 352static 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 363static 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 374static 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 382static 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 390static 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 396static 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 434static 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 444static 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 459static 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 472static 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 490static 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 510static 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 525static void tc6393xb_irq(struct irq_desc *desc) 526{ 527 struct tc6393xb *tc6393xb = irq_desc_get_handler_data(desc); 528 unsigned int isr; 529 unsigned int i, irq_base; 530 531 irq_base = tc6393xb->irq_base; 532 533 while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) & 534 ~tmio_ioread8(tc6393xb->scr + SCR_IMR))) 535 for (i = 0; i < TC6393XB_NR_IRQS; i++) { 536 if (isr & (1 << i)) 537 generic_handle_irq(irq_base + i); 538 } 539} 540 541static void tc6393xb_irq_ack(struct irq_data *data) 542{ 543} 544 545static void tc6393xb_irq_mask(struct irq_data *data) 546{ 547 struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data); 548 unsigned long flags; 549 u8 imr; 550 551 spin_lock_irqsave(&tc6393xb->lock, flags); 552 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR); 553 imr |= 1 << (data->irq - tc6393xb->irq_base); 554 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR); 555 spin_unlock_irqrestore(&tc6393xb->lock, flags); 556} 557 558static void tc6393xb_irq_unmask(struct irq_data *data) 559{ 560 struct tc6393xb *tc6393xb = irq_data_get_irq_chip_data(data); 561 unsigned long flags; 562 u8 imr; 563 564 spin_lock_irqsave(&tc6393xb->lock, flags); 565 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR); 566 imr &= ~(1 << (data->irq - tc6393xb->irq_base)); 567 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR); 568 spin_unlock_irqrestore(&tc6393xb->lock, flags); 569} 570 571static struct irq_chip tc6393xb_chip = { 572 .name = "tc6393xb", 573 .irq_ack = tc6393xb_irq_ack, 574 .irq_mask = tc6393xb_irq_mask, 575 .irq_unmask = tc6393xb_irq_unmask, 576}; 577 578static void tc6393xb_attach_irq(struct platform_device *dev) 579{ 580 struct tc6393xb *tc6393xb = platform_get_drvdata(dev); 581 unsigned int irq, irq_base; 582 583 irq_base = tc6393xb->irq_base; 584 585 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) { 586 irq_set_chip_and_handler(irq, &tc6393xb_chip, handle_edge_irq); 587 irq_set_chip_data(irq, tc6393xb); 588 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); 589 } 590 591 irq_set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING); 592 irq_set_chained_handler_and_data(tc6393xb->irq, tc6393xb_irq, 593 tc6393xb); 594} 595 596static void tc6393xb_detach_irq(struct platform_device *dev) 597{ 598 struct tc6393xb *tc6393xb = platform_get_drvdata(dev); 599 unsigned int irq, irq_base; 600 601 irq_set_chained_handler_and_data(tc6393xb->irq, NULL, NULL); 602 603 irq_base = tc6393xb->irq_base; 604 605 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) { 606 irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); 607 irq_set_chip(irq, NULL); 608 irq_set_chip_data(irq, NULL); 609 } 610} 611 612/*--------------------------------------------------------------------------*/ 613 614static int tc6393xb_probe(struct platform_device *dev) 615{ 616 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev); 617 struct tc6393xb *tc6393xb; 618 struct resource *iomem, *rscr; 619 int ret; 620 621 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); 622 if (!iomem) 623 return -EINVAL; 624 625 tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL); 626 if (!tc6393xb) { 627 ret = -ENOMEM; 628 goto err_kzalloc; 629 } 630 631 spin_lock_init(&tc6393xb->lock); 632 633 platform_set_drvdata(dev, tc6393xb); 634 635 ret = platform_get_irq(dev, 0); 636 if (ret >= 0) 637 tc6393xb->irq = ret; 638 else 639 goto err_noirq; 640 641 tc6393xb->iomem = iomem; 642 tc6393xb->irq_base = tcpd->irq_base; 643 644 tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI"); 645 if (IS_ERR(tc6393xb->clk)) { 646 ret = PTR_ERR(tc6393xb->clk); 647 goto err_clk_get; 648 } 649 650 rscr = &tc6393xb->rscr; 651 rscr->name = "tc6393xb-core"; 652 rscr->start = iomem->start; 653 rscr->end = iomem->start + 0xff; 654 rscr->flags = IORESOURCE_MEM; 655 656 ret = request_resource(iomem, rscr); 657 if (ret) 658 goto err_request_scr; 659 660 tc6393xb->scr = ioremap(rscr->start, resource_size(rscr)); 661 if (!tc6393xb->scr) { 662 ret = -ENOMEM; 663 goto err_ioremap; 664 } 665 666 ret = clk_prepare_enable(tc6393xb->clk); 667 if (ret) 668 goto err_clk_enable; 669 670 ret = tcpd->enable(dev); 671 if (ret) 672 goto err_enable; 673 674 iowrite8(0, tc6393xb->scr + SCR_FER); 675 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR); 676 iowrite16(SCR_CCR_UNK1 | SCR_CCR_HCLK_48, 677 tc6393xb->scr + SCR_CCR); 678 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN | 679 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN | 680 BIT(15), tc6393xb->scr + SCR_MCR); 681 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER); 682 iowrite8(0, tc6393xb->scr + SCR_IRR); 683 iowrite8(0xbf, tc6393xb->scr + SCR_IMR); 684 685 printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n", 686 tmio_ioread8(tc6393xb->scr + SCR_REVID), 687 (unsigned long) iomem->start, tc6393xb->irq); 688 689 tc6393xb->gpio.base = -1; 690 691 if (tcpd->gpio_base >= 0) { 692 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base); 693 if (ret) 694 goto err_gpio_add; 695 } 696 697 tc6393xb_attach_irq(dev); 698 699 if (tcpd->setup) { 700 ret = tcpd->setup(dev); 701 if (ret) 702 goto err_setup; 703 } 704 705 tc6393xb_cells[TC6393XB_CELL_NAND].platform_data = tcpd->nand_data; 706 tc6393xb_cells[TC6393XB_CELL_NAND].pdata_size = 707 sizeof(*tcpd->nand_data); 708 tc6393xb_cells[TC6393XB_CELL_FB].platform_data = tcpd->fb_data; 709 tc6393xb_cells[TC6393XB_CELL_FB].pdata_size = sizeof(*tcpd->fb_data); 710 711 ret = mfd_add_devices(&dev->dev, dev->id, 712 tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells), 713 iomem, tcpd->irq_base, NULL); 714 715 if (!ret) 716 return 0; 717 718 if (tcpd->teardown) 719 tcpd->teardown(dev); 720 721err_setup: 722 tc6393xb_detach_irq(dev); 723 724err_gpio_add: 725 if (tc6393xb->gpio.base != -1) 726 gpiochip_remove(&tc6393xb->gpio); 727 tcpd->disable(dev); 728err_enable: 729 clk_disable_unprepare(tc6393xb->clk); 730err_clk_enable: 731 iounmap(tc6393xb->scr); 732err_ioremap: 733 release_resource(&tc6393xb->rscr); 734err_request_scr: 735 clk_put(tc6393xb->clk); 736err_noirq: 737err_clk_get: 738 kfree(tc6393xb); 739err_kzalloc: 740 return ret; 741} 742 743static int tc6393xb_remove(struct platform_device *dev) 744{ 745 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev); 746 struct tc6393xb *tc6393xb = platform_get_drvdata(dev); 747 int ret; 748 749 mfd_remove_devices(&dev->dev); 750 751 if (tcpd->teardown) 752 tcpd->teardown(dev); 753 754 tc6393xb_detach_irq(dev); 755 756 if (tc6393xb->gpio.base != -1) 757 gpiochip_remove(&tc6393xb->gpio); 758 759 ret = tcpd->disable(dev); 760 clk_disable_unprepare(tc6393xb->clk); 761 iounmap(tc6393xb->scr); 762 release_resource(&tc6393xb->rscr); 763 clk_put(tc6393xb->clk); 764 kfree(tc6393xb); 765 766 return ret; 767} 768 769#ifdef CONFIG_PM 770static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state) 771{ 772 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev); 773 struct tc6393xb *tc6393xb = platform_get_drvdata(dev); 774 int i, ret; 775 776 tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR); 777 tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER); 778 779 for (i = 0; i < 3; i++) { 780 tc6393xb->suspend_state.gpo_dsr[i] = 781 ioread8(tc6393xb->scr + SCR_GPO_DSR(i)); 782 tc6393xb->suspend_state.gpo_doecr[i] = 783 ioread8(tc6393xb->scr + SCR_GPO_DOECR(i)); 784 tc6393xb->suspend_state.gpi_bcr[i] = 785 ioread8(tc6393xb->scr + SCR_GPI_BCR(i)); 786 } 787 ret = tcpd->suspend(dev); 788 clk_disable_unprepare(tc6393xb->clk); 789 790 return ret; 791} 792 793static int tc6393xb_resume(struct platform_device *dev) 794{ 795 struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev); 796 struct tc6393xb *tc6393xb = platform_get_drvdata(dev); 797 int ret; 798 int i; 799 800 clk_prepare_enable(tc6393xb->clk); 801 802 ret = tcpd->resume(dev); 803 if (ret) 804 return ret; 805 806 if (!tcpd->resume_restore) 807 return 0; 808 809 iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER); 810 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR); 811 iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR); 812 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN | 813 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN | 814 BIT(15), tc6393xb->scr + SCR_MCR); 815 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER); 816 iowrite8(0, tc6393xb->scr + SCR_IRR); 817 iowrite8(0xbf, tc6393xb->scr + SCR_IMR); 818 819 for (i = 0; i < 3; i++) { 820 iowrite8(tc6393xb->suspend_state.gpo_dsr[i], 821 tc6393xb->scr + SCR_GPO_DSR(i)); 822 iowrite8(tc6393xb->suspend_state.gpo_doecr[i], 823 tc6393xb->scr + SCR_GPO_DOECR(i)); 824 iowrite8(tc6393xb->suspend_state.gpi_bcr[i], 825 tc6393xb->scr + SCR_GPI_BCR(i)); 826 } 827 828 return 0; 829} 830#else 831#define tc6393xb_suspend NULL 832#define tc6393xb_resume NULL 833#endif 834 835static struct platform_driver tc6393xb_driver = { 836 .probe = tc6393xb_probe, 837 .remove = tc6393xb_remove, 838 .suspend = tc6393xb_suspend, 839 .resume = tc6393xb_resume, 840 841 .driver = { 842 .name = "tc6393xb", 843 }, 844}; 845 846static int __init tc6393xb_init(void) 847{ 848 return platform_driver_register(&tc6393xb_driver); 849} 850 851static void __exit tc6393xb_exit(void) 852{ 853 platform_driver_unregister(&tc6393xb_driver); 854} 855 856subsys_initcall(tc6393xb_init); 857module_exit(tc6393xb_exit); 858 859MODULE_LICENSE("GPL v2"); 860MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer"); 861MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller"); 862MODULE_ALIAS("platform:tc6393xb"); 863 864