arch/arm/mach-ep93xx/core.c

   1 /*
   2  * arch/arm/mach-ep93xx/core.c
   3  * Core routines for Cirrus EP93xx chips.
   4  *
   5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6  * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
   7  *
   8  * Thanks go to Michael Burian and Ray Lehtiniemi for their key
   9  * role in the ep93xx linux community.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  */
  16
  17 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/timex.h>
  25 #include <linux/irq.h>
  26 #include <linux/io.h>
  27 #include <linux/gpio.h>
  28 #include <linux/leds.h>
  29 #include <linux/termios.h>
  30 #include <linux/amba/bus.h>
  31 #include <linux/amba/serial.h>
  32 #include <linux/i2c.h>
  33 #include <linux/i2c-gpio.h>
  34 #include <linux/spi/spi.h>
  35
  36 #include <mach/hardware.h>
  37 #include <mach/fb.h>
  38 #include <mach/ep93xx_keypad.h>
  39 #include <mach/ep93xx_spi.h>
  40
  41 #include <asm/mach/map.h>
  42 #include <asm/mach/time.h>
  43
  44 #include <asm/hardware/vic.h>
  45
  46
  47 /*************************************************************************
  48  * Static I/O mappings that are needed for all EP93xx platforms
  49  *************************************************************************/
  50 static struct map_desc ep93xx_io_desc[] __initdata = {
  51         {
  52                 .virtual        = EP93XX_AHB_VIRT_BASE,
  53                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  54                 .length         = EP93XX_AHB_SIZE,
  55                 .type           = MT_DEVICE,
  56         }, {
  57                 .virtual        = EP93XX_APB_VIRT_BASE,
  58                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  59                 .length         = EP93XX_APB_SIZE,
  60                 .type           = MT_DEVICE,
  61         },
  62 };
  63
  64 void __init ep93xx_map_io(void)
  65 {
  66         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  67 }
  68
  69
  70 /*************************************************************************
  71  * Timer handling for EP93xx
  72  *************************************************************************
  73  * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
  74  * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
  75  * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
  76  * is free-running, and can't generate interrupts.
  77  *
  78  * The 508 kHz timers are ideal for use for the timer interrupt, as the
  79  * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
  80  * bit timers (timer 1) since we don't need more than 16 bits of reload
  81  * value as long as HZ >= 8.
  82  *
  83  * The higher clock rate of timer 4 makes it a better choice than the
  84  * other timers for use in gettimeoffset(), while the fact that it can't
  85  * generate interrupts means we don't have to worry about not being able
  86  * to use this timer for something else.  We also use timer 4 for keeping
  87  * track of lost jiffies.
  88  */
  89 #define EP93XX_TIMER_REG(x)             (EP93XX_TIMER_BASE + (x))
  90 #define EP93XX_TIMER1_LOAD              EP93XX_TIMER_REG(0x00)
  91 #define EP93XX_TIMER1_VALUE             EP93XX_TIMER_REG(0x04)
  92 #define EP93XX_TIMER1_CONTROL           EP93XX_TIMER_REG(0x08)
  93 #define EP93XX_TIMER123_CONTROL_ENABLE  (1 << 7)
  94 #define EP93XX_TIMER123_CONTROL_MODE    (1 << 6)
  95 #define EP93XX_TIMER123_CONTROL_CLKSEL  (1 << 3)
  96 #define EP93XX_TIMER1_CLEAR             EP93XX_TIMER_REG(0x0c)
  97 #define EP93XX_TIMER2_LOAD              EP93XX_TIMER_REG(0x20)
  98 #define EP93XX_TIMER2_VALUE             EP93XX_TIMER_REG(0x24)
  99 #define EP93XX_TIMER2_CONTROL           EP93XX_TIMER_REG(0x28)
 100 #define EP93XX_TIMER2_CLEAR             EP93XX_TIMER_REG(0x2c)
 101 #define EP93XX_TIMER4_VALUE_LOW         EP93XX_TIMER_REG(0x60)
 102 #define EP93XX_TIMER4_VALUE_HIGH        EP93XX_TIMER_REG(0x64)
 103 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
 104 #define EP93XX_TIMER3_LOAD              EP93XX_TIMER_REG(0x80)
 105 #define EP93XX_TIMER3_VALUE             EP93XX_TIMER_REG(0x84)
 106 #define EP93XX_TIMER3_CONTROL           EP93XX_TIMER_REG(0x88)
 107 #define EP93XX_TIMER3_CLEAR             EP93XX_TIMER_REG(0x8c)
 108
 109 #define EP93XX_TIMER123_CLOCK           508469
 110 #define EP93XX_TIMER4_CLOCK             983040
 111
 112 #define TIMER1_RELOAD                   ((EP93XX_TIMER123_CLOCK / HZ) - 1)
 113 #define TIMER4_TICKS_PER_JIFFY          DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 114
 115 static unsigned int last_jiffy_time;
 116
 117 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 118 {
 119         /* Writing any value clears the timer interrupt */
 120         __raw_writel(1, EP93XX_TIMER1_CLEAR);
 121
 122         /* Recover lost jiffies */
 123         while ((signed long)
 124                 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
 125                                                 >= TIMER4_TICKS_PER_JIFFY) {
 126                 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
 127                 timer_tick();
 128         }
 129
 130         return IRQ_HANDLED;
 131 }
 132
 133 static struct irqaction ep93xx_timer_irq = {
 134         .name           = "ep93xx timer",
 135         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 136         .handler        = ep93xx_timer_interrupt,
 137 };
 138
 139 static void __init ep93xx_timer_init(void)
 140 {
 141         u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
 142                     EP93XX_TIMER123_CONTROL_CLKSEL;
 143
 144         /* Enable periodic HZ timer.  */
 145         __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
 146         __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
 147         __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
 148                         EP93XX_TIMER1_CONTROL);
 149
 150         /* Enable lost jiffy timer.  */
 151         __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
 152                         EP93XX_TIMER4_VALUE_HIGH);
 153
 154         setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
 155 }
 156
 157 static unsigned long ep93xx_gettimeoffset(void)
 158 {
 159         int offset;
 160
 161         offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
 162
 163         /* Calculate (1000000 / 983040) * offset.  */
 164         return offset + (53 * offset / 3072);
 165 }
 166
 167 struct sys_timer ep93xx_timer = {
 168         .init           = ep93xx_timer_init,
 169         .offset         = ep93xx_gettimeoffset,
 170 };
 171
 172
 173 /*************************************************************************
 174  * EP93xx IRQ handling
 175  *************************************************************************/
 176 extern void ep93xx_gpio_init_irq(void);
 177
 178 void __init ep93xx_init_irq(void)
 179 {
 180         vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
 181         vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
 182
 183         ep93xx_gpio_init_irq();
 184 }
 185
 186
 187 /*************************************************************************
 188  * EP93xx System Controller Software Locked register handling
 189  *************************************************************************/
 190
 191 /*
 192  * syscon_swlock prevents anything else from writing to the syscon
 193  * block while a software locked register is being written.
 194  */
 195 static DEFINE_SPINLOCK(syscon_swlock);
 196
 197 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
 198 {
 199         unsigned long flags;
 200
 201         spin_lock_irqsave(&syscon_swlock, flags);
 202
 203         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 204         __raw_writel(val, reg);
 205
 206         spin_unlock_irqrestore(&syscon_swlock, flags);
 207 }
 208 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write);
 209
 210 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 211 {
 212         unsigned long flags;
 213         unsigned int val;
 214
 215         spin_lock_irqsave(&syscon_swlock, flags);
 216
 217         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 218         val |= set_bits;
 219         val &= ~clear_bits;
 220         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 221         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 222
 223         spin_unlock_irqrestore(&syscon_swlock, flags);
 224 }
 225 EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
 226
 227 /**
 228  * ep93xx_chip_revision() - returns the EP93xx chip revision
 229  *
 230  * See <mach/platform.h> for more information.
 231  */
 232 unsigned int ep93xx_chip_revision(void)
 233 {
 234         unsigned int v;
 235
 236         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 237         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 238         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 239         return v;
 240 }
 241
 242 /*************************************************************************
 243  * EP93xx peripheral handling
 244  *************************************************************************/
 245 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 246
 247 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 248                                   void __iomem *base, unsigned int mctrl)
 249 {
 250         unsigned int mcr;
 251
 252         mcr = 0;
 253         if (!(mctrl & TIOCM_RTS))
 254                 mcr |= 2;
 255         if (!(mctrl & TIOCM_DTR))
 256                 mcr |= 1;
 257
 258         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 259 }
 260
 261 static struct amba_pl010_data ep93xx_uart_data = {
 262         .set_mctrl      = ep93xx_uart_set_mctrl,
 263 };
 264
 265 static struct amba_device uart1_device = {
 266         .dev            = {
 267                 .init_name      = "apb:uart1",
 268                 .platform_data  = &ep93xx_uart_data,
 269         },
 270         .res            = {
 271                 .start  = EP93XX_UART1_PHYS_BASE,
 272                 .end    = EP93XX_UART1_PHYS_BASE + 0x0fff,
 273                 .flags  = IORESOURCE_MEM,
 274         },
 275         .irq            = { IRQ_EP93XX_UART1, NO_IRQ },
 276         .periphid       = 0x00041010,
 277 };
 278
 279 static struct amba_device uart2_device = {
 280         .dev            = {
 281                 .init_name      = "apb:uart2",
 282                 .platform_data  = &ep93xx_uart_data,
 283         },
 284         .res            = {
 285                 .start  = EP93XX_UART2_PHYS_BASE,
 286                 .end    = EP93XX_UART2_PHYS_BASE + 0x0fff,
 287                 .flags  = IORESOURCE_MEM,
 288         },
 289         .irq            = { IRQ_EP93XX_UART2, NO_IRQ },
 290         .periphid       = 0x00041010,
 291 };
 292
 293 static struct amba_device uart3_device = {
 294         .dev            = {
 295                 .init_name      = "apb:uart3",
 296                 .platform_data  = &ep93xx_uart_data,
 297         },
 298         .res            = {
 299                 .start  = EP93XX_UART3_PHYS_BASE,
 300                 .end    = EP93XX_UART3_PHYS_BASE + 0x0fff,
 301                 .flags  = IORESOURCE_MEM,
 302         },
 303         .irq            = { IRQ_EP93XX_UART3, NO_IRQ },
 304         .periphid       = 0x00041010,
 305 };
 306
 307
 308 static struct resource ep93xx_rtc_resource[] = {
 309         {
 310                 .start          = EP93XX_RTC_PHYS_BASE,
 311                 .end            = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
 312                 .flags          = IORESOURCE_MEM,
 313         },
 314 };
 315
 316 static struct platform_device ep93xx_rtc_device = {
 317         .name           = "ep93xx-rtc",
 318         .id             = -1,
 319         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 320         .resource       = ep93xx_rtc_resource,
 321 };
 322
 323
 324 static struct resource ep93xx_ohci_resources[] = {
 325         [0] = {
 326                 .start  = EP93XX_USB_PHYS_BASE,
 327                 .end    = EP93XX_USB_PHYS_BASE + 0x0fff,
 328                 .flags  = IORESOURCE_MEM,
 329         },
 330         [1] = {
 331                 .start  = IRQ_EP93XX_USB,
 332                 .end    = IRQ_EP93XX_USB,
 333                 .flags  = IORESOURCE_IRQ,
 334         },
 335 };
 336
 337
 338 static struct platform_device ep93xx_ohci_device = {
 339         .name           = "ep93xx-ohci",
 340         .id             = -1,
 341         .dev            = {
 342                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 343                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 344         },
 345         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 346         .resource       = ep93xx_ohci_resources,
 347 };
 348
 349
 350 /*************************************************************************
 351  * EP93xx ethernet peripheral handling
 352  *************************************************************************/
 353 static struct ep93xx_eth_data ep93xx_eth_data;
 354
 355 static struct resource ep93xx_eth_resource[] = {
 356         {
 357                 .start  = EP93XX_ETHERNET_PHYS_BASE,
 358                 .end    = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
 359                 .flags  = IORESOURCE_MEM,
 360         }, {
 361                 .start  = IRQ_EP93XX_ETHERNET,
 362                 .end    = IRQ_EP93XX_ETHERNET,
 363                 .flags  = IORESOURCE_IRQ,
 364         }
 365 };
 366
 367 static struct platform_device ep93xx_eth_device = {
 368         .name           = "ep93xx-eth",
 369         .id             = -1,
 370         .dev            = {
 371                 .platform_data  = &ep93xx_eth_data,
 372         },
 373         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 374         .resource       = ep93xx_eth_resource,
 375 };
 376
 377 /**
 378  * ep93xx_register_eth - Register the built-in ethernet platform device.
 379  * @data:       platform specific ethernet configuration (__initdata)
 380  * @copy_addr:  flag indicating that the MAC address should be copied
 381  *              from the IndAd registers (as programmed by the bootloader)
 382  */
 383 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 384 {
 385         if (copy_addr)
 386                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 387
 388         ep93xx_eth_data = *data;
 389         platform_device_register(&ep93xx_eth_device);
 390 }
 391
 392
 393 /*************************************************************************
 394  * EP93xx i2c peripheral handling
 395  *************************************************************************/
 396 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 397
 398 static struct platform_device ep93xx_i2c_device = {
 399         .name           = "i2c-gpio",
 400         .id             = 0,
 401         .dev            = {
 402                 .platform_data  = &ep93xx_i2c_data,
 403         },
 404 };
 405
 406 /**
 407  * ep93xx_register_i2c - Register the i2c platform device.
 408  * @data:       platform specific i2c-gpio configuration (__initdata)
 409  * @devices:    platform specific i2c bus device information (__initdata)
 410  * @num:        the number of devices on the i2c bus
 411  */
 412 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 413                                 struct i2c_board_info *devices, int num)
 414 {
 415         /*
 416          * Set the EEPROM interface pin drive type control.
 417          * Defines the driver type for the EECLK and EEDAT pins as either
 418          * open drain, which will require an external pull-up, or a normal
 419          * CMOS driver.
 420          */
 421         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 422                 pr_warning("sda != EEDAT, open drain has no effect\n");
 423         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 424                 pr_warning("scl != EECLK, open drain has no effect\n");
 425
 426         __raw_writel((data->sda_is_open_drain << 1) |
 427                      (data->scl_is_open_drain << 0),
 428                      EP93XX_GPIO_EEDRIVE);
 429
 430         ep93xx_i2c_data = *data;
 431         i2c_register_board_info(0, devices, num);
 432         platform_device_register(&ep93xx_i2c_device);
 433 }
 434
 435 /*************************************************************************
 436  * EP93xx SPI peripheral handling
 437  *************************************************************************/
 438 static struct ep93xx_spi_info ep93xx_spi_master_data;
 439
 440 static struct resource ep93xx_spi_resources[] = {
 441         {
 442                 .start  = EP93XX_SPI_PHYS_BASE,
 443                 .end    = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
 444                 .flags  = IORESOURCE_MEM,
 445         },
 446         {
 447                 .start  = IRQ_EP93XX_SSP,
 448                 .end    = IRQ_EP93XX_SSP,
 449                 .flags  = IORESOURCE_IRQ,
 450         },
 451 };
 452
 453 static struct platform_device ep93xx_spi_device = {
 454         .name           = "ep93xx-spi",
 455         .id             = 0,
 456         .dev            = {
 457                 .platform_data = &ep93xx_spi_master_data,
 458         },
 459         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 460         .resource       = ep93xx_spi_resources,
 461 };
 462
 463 /**
 464  * ep93xx_register_spi() - registers spi platform device
 465  * @info: ep93xx board specific spi master info (__initdata)
 466  * @devices: SPI devices to register (__initdata)
 467  * @num: number of SPI devices to register
 468  *
 469  * This function registers platform device for the EP93xx SPI controller and
 470  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 471  */
 472 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 473                                 struct spi_board_info *devices, int num)
 474 {
 475         /*
 476          * When SPI is used, we need to make sure that I2S is muxed off from
 477          * SPI pins.
 478          */
 479         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 480
 481         ep93xx_spi_master_data = *info;
 482         spi_register_board_info(devices, num);
 483         platform_device_register(&ep93xx_spi_device);
 484 }
 485
 486 /*************************************************************************
 487  * EP93xx LEDs
 488  *************************************************************************/
 489 static struct gpio_led ep93xx_led_pins[] = {
 490         {
 491                 .name   = "platform:grled",
 492                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 493         }, {
 494                 .name   = "platform:rdled",
 495                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 496         },
 497 };
 498
 499 static struct gpio_led_platform_data ep93xx_led_data = {
 500         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 501         .leds           = ep93xx_led_pins,
 502 };
 503
 504 static struct platform_device ep93xx_leds = {
 505         .name           = "leds-gpio",
 506         .id             = -1,
 507         .dev            = {
 508                 .platform_data  = &ep93xx_led_data,
 509         },
 510 };
 511
 512
 513 /*************************************************************************
 514  * EP93xx pwm peripheral handling
 515  *************************************************************************/
 516 static struct resource ep93xx_pwm0_resource[] = {
 517         {
 518                 .start  = EP93XX_PWM_PHYS_BASE,
 519                 .end    = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
 520                 .flags  = IORESOURCE_MEM,
 521         },
 522 };
 523
 524 static struct platform_device ep93xx_pwm0_device = {
 525         .name           = "ep93xx-pwm",
 526         .id             = 0,
 527         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 528         .resource       = ep93xx_pwm0_resource,
 529 };
 530
 531 static struct resource ep93xx_pwm1_resource[] = {
 532         {
 533                 .start  = EP93XX_PWM_PHYS_BASE + 0x20,
 534                 .end    = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
 535                 .flags  = IORESOURCE_MEM,
 536         },
 537 };
 538
 539 static struct platform_device ep93xx_pwm1_device = {
 540         .name           = "ep93xx-pwm",
 541         .id             = 1,
 542         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 543         .resource       = ep93xx_pwm1_resource,
 544 };
 545
 546 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 547 {
 548         if (pwm0)
 549                 platform_device_register(&ep93xx_pwm0_device);
 550
 551         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 552         if (pwm1)
 553                 platform_device_register(&ep93xx_pwm1_device);
 554 }
 555
 556 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 557 {
 558         int err;
 559
 560         if (pdev->id == 0) {
 561                 err = 0;
 562         } else if (pdev->id == 1) {
 563                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 564                                    dev_name(&pdev->dev));
 565                 if (err)
 566                         return err;
 567                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 568                 if (err)
 569                         goto fail;
 570
 571                 /* PWM 1 output on EGPIO[14] */
 572                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 573         } else {
 574                 err = -ENODEV;
 575         }
 576
 577         return err;
 578
 579 fail:
 580         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 581         return err;
 582 }
 583 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 584
 585 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 586 {
 587         if (pdev->id == 1) {
 588                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 589                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 590
 591                 /* EGPIO[14] used for GPIO */
 592                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 593         }
 594 }
 595 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 596
 597
 598 /*************************************************************************
 599  * EP93xx video peripheral handling
 600  *************************************************************************/
 601 static struct ep93xxfb_mach_info ep93xxfb_data;
 602
 603 static struct resource ep93xx_fb_resource[] = {
 604         {
 605                 .start          = EP93XX_RASTER_PHYS_BASE,
 606                 .end            = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
 607                 .flags          = IORESOURCE_MEM,
 608         },
 609 };
 610
 611 static struct platform_device ep93xx_fb_device = {
 612         .name                   = "ep93xx-fb",
 613         .id                     = -1,
 614         .dev                    = {
 615                 .platform_data          = &ep93xxfb_data,
 616                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 617                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 618         },
 619         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 620         .resource               = ep93xx_fb_resource,
 621 };
 622
 623 /**
 624  * ep93xx_register_fb - Register the framebuffer platform device.
 625  * @data:       platform specific framebuffer configuration (__initdata)
 626  */
 627 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 628 {
 629         ep93xxfb_data = *data;
 630         platform_device_register(&ep93xx_fb_device);
 631 }
 632
 633
 634 /*************************************************************************
 635  * EP93xx matrix keypad peripheral handling
 636  *************************************************************************/
 637 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 638
 639 static struct resource ep93xx_keypad_resource[] = {
 640         {
 641                 .start  = EP93XX_KEY_MATRIX_PHYS_BASE,
 642                 .end    = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
 643                 .flags  = IORESOURCE_MEM,
 644         }, {
 645                 .start  = IRQ_EP93XX_KEY,
 646                 .end    = IRQ_EP93XX_KEY,
 647                 .flags  = IORESOURCE_IRQ,
 648         },
 649 };
 650
 651 static struct platform_device ep93xx_keypad_device = {
 652         .name           = "ep93xx-keypad",
 653         .id             = -1,
 654         .dev            = {
 655                 .platform_data  = &ep93xx_keypad_data,
 656         },
 657         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 658         .resource       = ep93xx_keypad_resource,
 659 };
 660
 661 /**
 662  * ep93xx_register_keypad - Register the keypad platform device.
 663  * @data:       platform specific keypad configuration (__initdata)
 664  */
 665 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 666 {
 667         ep93xx_keypad_data = *data;
 668         platform_device_register(&ep93xx_keypad_device);
 669 }
 670
 671 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 672 {
 673         int err;
 674         int i;
 675
 676         for (i = 0; i < 8; i++) {
 677                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 678                 if (err)
 679                         goto fail_gpio_c;
 680                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 681                 if (err)
 682                         goto fail_gpio_d;
 683         }
 684
 685         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 686         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 687                                  EP93XX_SYSCON_DEVCFG_GONK);
 688
 689         return 0;
 690
 691 fail_gpio_d:
 692         gpio_free(EP93XX_GPIO_LINE_C(i));
 693 fail_gpio_c:
 694         for ( ; i >= 0; --i) {
 695                 gpio_free(EP93XX_GPIO_LINE_C(i));
 696                 gpio_free(EP93XX_GPIO_LINE_D(i));
 697         }
 698         return err;
 699 }
 700 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 701
 702 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 703 {
 704         int i;
 705
 706         for (i = 0; i < 8; i++) {
 707                 gpio_free(EP93XX_GPIO_LINE_C(i));
 708                 gpio_free(EP93XX_GPIO_LINE_D(i));
 709         }
 710
 711         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 712         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 713                                EP93XX_SYSCON_DEVCFG_GONK);
 714 }
 715 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 716
 717
 718 extern void ep93xx_gpio_init(void);
 719
 720 void __init ep93xx_init_devices(void)
 721 {
 722         /* Disallow access to MaverickCrunch initially */
 723         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 724
 725         ep93xx_gpio_init();
 726
 727         amba_device_register(&uart1_device, &iomem_resource);
 728         amba_device_register(&uart2_device, &iomem_resource);
 729         amba_device_register(&uart3_device, &iomem_resource);
 730
 731         platform_device_register(&ep93xx_rtc_device);
 732         platform_device_register(&ep93xx_ohci_device);
 733         platform_device_register(&ep93xx_leds);
 734 }