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/mtd/physmap.h>
  33 #include <linux/i2c.h>
  34 #include <linux/i2c-gpio.h>
  35 #include <linux/spi/spi.h>
  36
  37 #include <mach/hardware.h>
  38 #include <mach/fb.h>
  39 #include <mach/ep93xx_keypad.h>
  40 #include <mach/ep93xx_spi.h>
  41
  42 #include <asm/mach/map.h>
  43 #include <asm/mach/time.h>
  44
  45 #include <asm/hardware/vic.h>
  46
  47
  48 /*************************************************************************
  49  * Static I/O mappings that are needed for all EP93xx platforms
  50  *************************************************************************/
  51 static struct map_desc ep93xx_io_desc[] __initdata = {
  52         {
  53                 .virtual        = EP93XX_AHB_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  55                 .length         = EP93XX_AHB_SIZE,
  56                 .type           = MT_DEVICE,
  57         }, {
  58                 .virtual        = EP93XX_APB_VIRT_BASE,
  59                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  60                 .length         = EP93XX_APB_SIZE,
  61                 .type           = MT_DEVICE,
  62         },
  63 };
  64
  65 void __init ep93xx_map_io(void)
  66 {
  67         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  68 }
  69
  70
  71 /*************************************************************************
  72  * Timer handling for EP93xx
  73  *************************************************************************
  74  * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
  75  * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
  76  * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
  77  * is free-running, and can't generate interrupts.
  78  *
  79  * The 508 kHz timers are ideal for use for the timer interrupt, as the
  80  * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
  81  * bit timers (timer 1) since we don't need more than 16 bits of reload
  82  * value as long as HZ >= 8.
  83  *
  84  * The higher clock rate of timer 4 makes it a better choice than the
  85  * other timers for use in gettimeoffset(), while the fact that it can't
  86  * generate interrupts means we don't have to worry about not being able
  87  * to use this timer for something else.  We also use timer 4 for keeping
  88  * track of lost jiffies.
  89  */
  90 #define EP93XX_TIMER_REG(x)             (EP93XX_TIMER_BASE + (x))
  91 #define EP93XX_TIMER1_LOAD              EP93XX_TIMER_REG(0x00)
  92 #define EP93XX_TIMER1_VALUE             EP93XX_TIMER_REG(0x04)
  93 #define EP93XX_TIMER1_CONTROL           EP93XX_TIMER_REG(0x08)
  94 #define EP93XX_TIMER123_CONTROL_ENABLE  (1 << 7)
  95 #define EP93XX_TIMER123_CONTROL_MODE    (1 << 6)
  96 #define EP93XX_TIMER123_CONTROL_CLKSEL  (1 << 3)
  97 #define EP93XX_TIMER1_CLEAR             EP93XX_TIMER_REG(0x0c)
  98 #define EP93XX_TIMER2_LOAD              EP93XX_TIMER_REG(0x20)
  99 #define EP93XX_TIMER2_VALUE             EP93XX_TIMER_REG(0x24)
 100 #define EP93XX_TIMER2_CONTROL           EP93XX_TIMER_REG(0x28)
 101 #define EP93XX_TIMER2_CLEAR             EP93XX_TIMER_REG(0x2c)
 102 #define EP93XX_TIMER4_VALUE_LOW         EP93XX_TIMER_REG(0x60)
 103 #define EP93XX_TIMER4_VALUE_HIGH        EP93XX_TIMER_REG(0x64)
 104 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
 105 #define EP93XX_TIMER3_LOAD              EP93XX_TIMER_REG(0x80)
 106 #define EP93XX_TIMER3_VALUE             EP93XX_TIMER_REG(0x84)
 107 #define EP93XX_TIMER3_CONTROL           EP93XX_TIMER_REG(0x88)
 108 #define EP93XX_TIMER3_CLEAR             EP93XX_TIMER_REG(0x8c)
 109
 110 #define EP93XX_TIMER123_CLOCK           508469
 111 #define EP93XX_TIMER4_CLOCK             983040
 112
 113 #define TIMER1_RELOAD                   ((EP93XX_TIMER123_CLOCK / HZ) - 1)
 114 #define TIMER4_TICKS_PER_JIFFY          DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 115
 116 static unsigned int last_jiffy_time;
 117
 118 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 119 {
 120         /* Writing any value clears the timer interrupt */
 121         __raw_writel(1, EP93XX_TIMER1_CLEAR);
 122
 123         /* Recover lost jiffies */
 124         while ((signed long)
 125                 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
 126                                                 >= TIMER4_TICKS_PER_JIFFY) {
 127                 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
 128                 timer_tick();
 129         }
 130
 131         return IRQ_HANDLED;
 132 }
 133
 134 static struct irqaction ep93xx_timer_irq = {
 135         .name           = "ep93xx timer",
 136         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 137         .handler        = ep93xx_timer_interrupt,
 138 };
 139
 140 static void __init ep93xx_timer_init(void)
 141 {
 142         u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
 143                     EP93XX_TIMER123_CONTROL_CLKSEL;
 144
 145         /* Enable periodic HZ timer.  */
 146         __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
 147         __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
 148         __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
 149                         EP93XX_TIMER1_CONTROL);
 150
 151         /* Enable lost jiffy timer.  */
 152         __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
 153                         EP93XX_TIMER4_VALUE_HIGH);
 154
 155         setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
 156 }
 157
 158 static unsigned long ep93xx_gettimeoffset(void)
 159 {
 160         int offset;
 161
 162         offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
 163
 164         /* Calculate (1000000 / 983040) * offset.  */
 165         return offset + (53 * offset / 3072);
 166 }
 167
 168 struct sys_timer ep93xx_timer = {
 169         .init           = ep93xx_timer_init,
 170         .offset         = ep93xx_gettimeoffset,
 171 };
 172
 173
 174 /*************************************************************************
 175  * EP93xx IRQ handling
 176  *************************************************************************/
 177 void __init ep93xx_init_irq(void)
 178 {
 179         vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
 180         vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
 181 }
 182
 183
 184 /*************************************************************************
 185  * EP93xx System Controller Software Locked register handling
 186  *************************************************************************/
 187
 188 /*
 189  * syscon_swlock prevents anything else from writing to the syscon
 190  * block while a software locked register is being written.
 191  */
 192 static DEFINE_SPINLOCK(syscon_swlock);
 193
 194 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
 195 {
 196         unsigned long flags;
 197
 198         spin_lock_irqsave(&syscon_swlock, flags);
 199
 200         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 201         __raw_writel(val, reg);
 202
 203         spin_unlock_irqrestore(&syscon_swlock, flags);
 204 }
 205 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write);
 206
 207 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 208 {
 209         unsigned long flags;
 210         unsigned int val;
 211
 212         spin_lock_irqsave(&syscon_swlock, flags);
 213
 214         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 215         val &= ~clear_bits;
 216         val |= set_bits;
 217         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 218         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 219
 220         spin_unlock_irqrestore(&syscon_swlock, flags);
 221 }
 222 EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
 223
 224 /**
 225  * ep93xx_chip_revision() - returns the EP93xx chip revision
 226  *
 227  * See <mach/platform.h> for more information.
 228  */
 229 unsigned int ep93xx_chip_revision(void)
 230 {
 231         unsigned int v;
 232
 233         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 234         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 235         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 236         return v;
 237 }
 238
 239 /*************************************************************************
 240  * EP93xx GPIO
 241  *************************************************************************/
 242 static struct resource ep93xx_gpio_resource[] = {
 243         {
 244                 .start          = EP93XX_GPIO_PHYS_BASE,
 245                 .end            = EP93XX_GPIO_PHYS_BASE + 0xcc - 1,
 246                 .flags          = IORESOURCE_MEM,
 247         },
 248 };
 249
 250 static struct platform_device ep93xx_gpio_device = {
 251         .name           = "gpio-ep93xx",
 252         .id             = -1,
 253         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 254         .resource       = ep93xx_gpio_resource,
 255 };
 256
 257 /*************************************************************************
 258  * EP93xx peripheral handling
 259  *************************************************************************/
 260 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 261
 262 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 263                                   void __iomem *base, unsigned int mctrl)
 264 {
 265         unsigned int mcr;
 266
 267         mcr = 0;
 268         if (mctrl & TIOCM_RTS)
 269                 mcr |= 2;
 270         if (mctrl & TIOCM_DTR)
 271                 mcr |= 1;
 272
 273         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 274 }
 275
 276 static struct amba_pl010_data ep93xx_uart_data = {
 277         .set_mctrl      = ep93xx_uart_set_mctrl,
 278 };
 279
 280 static struct amba_device uart1_device = {
 281         .dev            = {
 282                 .init_name      = "apb:uart1",
 283                 .platform_data  = &ep93xx_uart_data,
 284         },
 285         .res            = {
 286                 .start  = EP93XX_UART1_PHYS_BASE,
 287                 .end    = EP93XX_UART1_PHYS_BASE + 0x0fff,
 288                 .flags  = IORESOURCE_MEM,
 289         },
 290         .irq            = { IRQ_EP93XX_UART1, NO_IRQ },
 291         .periphid       = 0x00041010,
 292 };
 293
 294 static struct amba_device uart2_device = {
 295         .dev            = {
 296                 .init_name      = "apb:uart2",
 297                 .platform_data  = &ep93xx_uart_data,
 298         },
 299         .res            = {
 300                 .start  = EP93XX_UART2_PHYS_BASE,
 301                 .end    = EP93XX_UART2_PHYS_BASE + 0x0fff,
 302                 .flags  = IORESOURCE_MEM,
 303         },
 304         .irq            = { IRQ_EP93XX_UART2, NO_IRQ },
 305         .periphid       = 0x00041010,
 306 };
 307
 308 static struct amba_device uart3_device = {
 309         .dev            = {
 310                 .init_name      = "apb:uart3",
 311                 .platform_data  = &ep93xx_uart_data,
 312         },
 313         .res            = {
 314                 .start  = EP93XX_UART3_PHYS_BASE,
 315                 .end    = EP93XX_UART3_PHYS_BASE + 0x0fff,
 316                 .flags  = IORESOURCE_MEM,
 317         },
 318         .irq            = { IRQ_EP93XX_UART3, NO_IRQ },
 319         .periphid       = 0x00041010,
 320 };
 321
 322
 323 static struct resource ep93xx_rtc_resource[] = {
 324         {
 325                 .start          = EP93XX_RTC_PHYS_BASE,
 326                 .end            = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
 327                 .flags          = IORESOURCE_MEM,
 328         },
 329 };
 330
 331 static struct platform_device ep93xx_rtc_device = {
 332         .name           = "ep93xx-rtc",
 333         .id             = -1,
 334         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 335         .resource       = ep93xx_rtc_resource,
 336 };
 337
 338
 339 static struct resource ep93xx_ohci_resources[] = {
 340         [0] = {
 341                 .start  = EP93XX_USB_PHYS_BASE,
 342                 .end    = EP93XX_USB_PHYS_BASE + 0x0fff,
 343                 .flags  = IORESOURCE_MEM,
 344         },
 345         [1] = {
 346                 .start  = IRQ_EP93XX_USB,
 347                 .end    = IRQ_EP93XX_USB,
 348                 .flags  = IORESOURCE_IRQ,
 349         },
 350 };
 351
 352
 353 static struct platform_device ep93xx_ohci_device = {
 354         .name           = "ep93xx-ohci",
 355         .id             = -1,
 356         .dev            = {
 357                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 358                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 359         },
 360         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 361         .resource       = ep93xx_ohci_resources,
 362 };
 363
 364
 365 /*************************************************************************
 366  * EP93xx physmap'ed flash
 367  *************************************************************************/
 368 static struct physmap_flash_data ep93xx_flash_data;
 369
 370 static struct resource ep93xx_flash_resource = {
 371         .flags          = IORESOURCE_MEM,
 372 };
 373
 374 static struct platform_device ep93xx_flash = {
 375         .name           = "physmap-flash",
 376         .id             = 0,
 377         .dev            = {
 378                 .platform_data  = &ep93xx_flash_data,
 379         },
 380         .num_resources  = 1,
 381         .resource       = &ep93xx_flash_resource,
 382 };
 383
 384 /**
 385  * ep93xx_register_flash() - Register the external flash device.
 386  * @width:      bank width in octets
 387  * @start:      resource start address
 388  * @size:       resource size
 389  */
 390 void __init ep93xx_register_flash(unsigned int width,
 391                                   resource_size_t start, resource_size_t size)
 392 {
 393         ep93xx_flash_data.width         = width;
 394
 395         ep93xx_flash_resource.start     = start;
 396         ep93xx_flash_resource.end       = start + size - 1;
 397
 398         platform_device_register(&ep93xx_flash);
 399 }
 400
 401
 402 /*************************************************************************
 403  * EP93xx ethernet peripheral handling
 404  *************************************************************************/
 405 static struct ep93xx_eth_data ep93xx_eth_data;
 406
 407 static struct resource ep93xx_eth_resource[] = {
 408         {
 409                 .start  = EP93XX_ETHERNET_PHYS_BASE,
 410                 .end    = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
 411                 .flags  = IORESOURCE_MEM,
 412         }, {
 413                 .start  = IRQ_EP93XX_ETHERNET,
 414                 .end    = IRQ_EP93XX_ETHERNET,
 415                 .flags  = IORESOURCE_IRQ,
 416         }
 417 };
 418
 419 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 420
 421 static struct platform_device ep93xx_eth_device = {
 422         .name           = "ep93xx-eth",
 423         .id             = -1,
 424         .dev            = {
 425                 .platform_data          = &ep93xx_eth_data,
 426                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 427                 .dma_mask               = &ep93xx_eth_dma_mask,
 428         },
 429         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 430         .resource       = ep93xx_eth_resource,
 431 };
 432
 433 /**
 434  * ep93xx_register_eth - Register the built-in ethernet platform device.
 435  * @data:       platform specific ethernet configuration (__initdata)
 436  * @copy_addr:  flag indicating that the MAC address should be copied
 437  *              from the IndAd registers (as programmed by the bootloader)
 438  */
 439 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 440 {
 441         if (copy_addr)
 442                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 443
 444         ep93xx_eth_data = *data;
 445         platform_device_register(&ep93xx_eth_device);
 446 }
 447
 448
 449 /*************************************************************************
 450  * EP93xx i2c peripheral handling
 451  *************************************************************************/
 452 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 453
 454 static struct platform_device ep93xx_i2c_device = {
 455         .name           = "i2c-gpio",
 456         .id             = 0,
 457         .dev            = {
 458                 .platform_data  = &ep93xx_i2c_data,
 459         },
 460 };
 461
 462 /**
 463  * ep93xx_register_i2c - Register the i2c platform device.
 464  * @data:       platform specific i2c-gpio configuration (__initdata)
 465  * @devices:    platform specific i2c bus device information (__initdata)
 466  * @num:        the number of devices on the i2c bus
 467  */
 468 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 469                                 struct i2c_board_info *devices, int num)
 470 {
 471         /*
 472          * Set the EEPROM interface pin drive type control.
 473          * Defines the driver type for the EECLK and EEDAT pins as either
 474          * open drain, which will require an external pull-up, or a normal
 475          * CMOS driver.
 476          */
 477         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 478                 pr_warning("sda != EEDAT, open drain has no effect\n");
 479         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 480                 pr_warning("scl != EECLK, open drain has no effect\n");
 481
 482         __raw_writel((data->sda_is_open_drain << 1) |
 483                      (data->scl_is_open_drain << 0),
 484                      EP93XX_GPIO_EEDRIVE);
 485
 486         ep93xx_i2c_data = *data;
 487         i2c_register_board_info(0, devices, num);
 488         platform_device_register(&ep93xx_i2c_device);
 489 }
 490
 491 /*************************************************************************
 492  * EP93xx SPI peripheral handling
 493  *************************************************************************/
 494 static struct ep93xx_spi_info ep93xx_spi_master_data;
 495
 496 static struct resource ep93xx_spi_resources[] = {
 497         {
 498                 .start  = EP93XX_SPI_PHYS_BASE,
 499                 .end    = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
 500                 .flags  = IORESOURCE_MEM,
 501         },
 502         {
 503                 .start  = IRQ_EP93XX_SSP,
 504                 .end    = IRQ_EP93XX_SSP,
 505                 .flags  = IORESOURCE_IRQ,
 506         },
 507 };
 508
 509 static struct platform_device ep93xx_spi_device = {
 510         .name           = "ep93xx-spi",
 511         .id             = 0,
 512         .dev            = {
 513                 .platform_data = &ep93xx_spi_master_data,
 514         },
 515         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 516         .resource       = ep93xx_spi_resources,
 517 };
 518
 519 /**
 520  * ep93xx_register_spi() - registers spi platform device
 521  * @info: ep93xx board specific spi master info (__initdata)
 522  * @devices: SPI devices to register (__initdata)
 523  * @num: number of SPI devices to register
 524  *
 525  * This function registers platform device for the EP93xx SPI controller and
 526  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 527  */
 528 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 529                                 struct spi_board_info *devices, int num)
 530 {
 531         /*
 532          * When SPI is used, we need to make sure that I2S is muxed off from
 533          * SPI pins.
 534          */
 535         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 536
 537         ep93xx_spi_master_data = *info;
 538         spi_register_board_info(devices, num);
 539         platform_device_register(&ep93xx_spi_device);
 540 }
 541
 542 /*************************************************************************
 543  * EP93xx LEDs
 544  *************************************************************************/
 545 static struct gpio_led ep93xx_led_pins[] = {
 546         {
 547                 .name   = "platform:grled",
 548                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 549         }, {
 550                 .name   = "platform:rdled",
 551                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 552         },
 553 };
 554
 555 static struct gpio_led_platform_data ep93xx_led_data = {
 556         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 557         .leds           = ep93xx_led_pins,
 558 };
 559
 560 static struct platform_device ep93xx_leds = {
 561         .name           = "leds-gpio",
 562         .id             = -1,
 563         .dev            = {
 564                 .platform_data  = &ep93xx_led_data,
 565         },
 566 };
 567
 568
 569 /*************************************************************************
 570  * EP93xx pwm peripheral handling
 571  *************************************************************************/
 572 static struct resource ep93xx_pwm0_resource[] = {
 573         {
 574                 .start  = EP93XX_PWM_PHYS_BASE,
 575                 .end    = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
 576                 .flags  = IORESOURCE_MEM,
 577         },
 578 };
 579
 580 static struct platform_device ep93xx_pwm0_device = {
 581         .name           = "ep93xx-pwm",
 582         .id             = 0,
 583         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 584         .resource       = ep93xx_pwm0_resource,
 585 };
 586
 587 static struct resource ep93xx_pwm1_resource[] = {
 588         {
 589                 .start  = EP93XX_PWM_PHYS_BASE + 0x20,
 590                 .end    = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
 591                 .flags  = IORESOURCE_MEM,
 592         },
 593 };
 594
 595 static struct platform_device ep93xx_pwm1_device = {
 596         .name           = "ep93xx-pwm",
 597         .id             = 1,
 598         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 599         .resource       = ep93xx_pwm1_resource,
 600 };
 601
 602 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 603 {
 604         if (pwm0)
 605                 platform_device_register(&ep93xx_pwm0_device);
 606
 607         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 608         if (pwm1)
 609                 platform_device_register(&ep93xx_pwm1_device);
 610 }
 611
 612 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 613 {
 614         int err;
 615
 616         if (pdev->id == 0) {
 617                 err = 0;
 618         } else if (pdev->id == 1) {
 619                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 620                                    dev_name(&pdev->dev));
 621                 if (err)
 622                         return err;
 623                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 624                 if (err)
 625                         goto fail;
 626
 627                 /* PWM 1 output on EGPIO[14] */
 628                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 629         } else {
 630                 err = -ENODEV;
 631         }
 632
 633         return err;
 634
 635 fail:
 636         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 637         return err;
 638 }
 639 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 640
 641 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 642 {
 643         if (pdev->id == 1) {
 644                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 645                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 646
 647                 /* EGPIO[14] used for GPIO */
 648                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 649         }
 650 }
 651 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 652
 653
 654 /*************************************************************************
 655  * EP93xx video peripheral handling
 656  *************************************************************************/
 657 static struct ep93xxfb_mach_info ep93xxfb_data;
 658
 659 static struct resource ep93xx_fb_resource[] = {
 660         {
 661                 .start          = EP93XX_RASTER_PHYS_BASE,
 662                 .end            = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
 663                 .flags          = IORESOURCE_MEM,
 664         },
 665 };
 666
 667 static struct platform_device ep93xx_fb_device = {
 668         .name                   = "ep93xx-fb",
 669         .id                     = -1,
 670         .dev                    = {
 671                 .platform_data          = &ep93xxfb_data,
 672                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 673                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 674         },
 675         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 676         .resource               = ep93xx_fb_resource,
 677 };
 678
 679 static struct platform_device ep93xx_bl_device = {
 680         .name           = "ep93xx-bl",
 681         .id             = -1,
 682 };
 683
 684 /**
 685  * ep93xx_register_fb - Register the framebuffer platform device.
 686  * @data:       platform specific framebuffer configuration (__initdata)
 687  */
 688 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 689 {
 690         ep93xxfb_data = *data;
 691         platform_device_register(&ep93xx_fb_device);
 692         platform_device_register(&ep93xx_bl_device);
 693 }
 694
 695
 696 /*************************************************************************
 697  * EP93xx matrix keypad peripheral handling
 698  *************************************************************************/
 699 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 700
 701 static struct resource ep93xx_keypad_resource[] = {
 702         {
 703                 .start  = EP93XX_KEY_MATRIX_PHYS_BASE,
 704                 .end    = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
 705                 .flags  = IORESOURCE_MEM,
 706         }, {
 707                 .start  = IRQ_EP93XX_KEY,
 708                 .end    = IRQ_EP93XX_KEY,
 709                 .flags  = IORESOURCE_IRQ,
 710         },
 711 };
 712
 713 static struct platform_device ep93xx_keypad_device = {
 714         .name           = "ep93xx-keypad",
 715         .id             = -1,
 716         .dev            = {
 717                 .platform_data  = &ep93xx_keypad_data,
 718         },
 719         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 720         .resource       = ep93xx_keypad_resource,
 721 };
 722
 723 /**
 724  * ep93xx_register_keypad - Register the keypad platform device.
 725  * @data:       platform specific keypad configuration (__initdata)
 726  */
 727 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 728 {
 729         ep93xx_keypad_data = *data;
 730         platform_device_register(&ep93xx_keypad_device);
 731 }
 732
 733 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 734 {
 735         int err;
 736         int i;
 737
 738         for (i = 0; i < 8; i++) {
 739                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 740                 if (err)
 741                         goto fail_gpio_c;
 742                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 743                 if (err)
 744                         goto fail_gpio_d;
 745         }
 746
 747         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 748         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 749                                  EP93XX_SYSCON_DEVCFG_GONK);
 750
 751         return 0;
 752
 753 fail_gpio_d:
 754         gpio_free(EP93XX_GPIO_LINE_C(i));
 755 fail_gpio_c:
 756         for ( ; i >= 0; --i) {
 757                 gpio_free(EP93XX_GPIO_LINE_C(i));
 758                 gpio_free(EP93XX_GPIO_LINE_D(i));
 759         }
 760         return err;
 761 }
 762 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 763
 764 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 765 {
 766         int i;
 767
 768         for (i = 0; i < 8; i++) {
 769                 gpio_free(EP93XX_GPIO_LINE_C(i));
 770                 gpio_free(EP93XX_GPIO_LINE_D(i));
 771         }
 772
 773         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 774         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 775                                EP93XX_SYSCON_DEVCFG_GONK);
 776 }
 777 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 778
 779 /*************************************************************************
 780  * EP93xx I2S audio peripheral handling
 781  *************************************************************************/
 782 static struct resource ep93xx_i2s_resource[] = {
 783         {
 784                 .start  = EP93XX_I2S_PHYS_BASE,
 785                 .end    = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
 786                 .flags  = IORESOURCE_MEM,
 787         },
 788 };
 789
 790 static struct platform_device ep93xx_i2s_device = {
 791         .name           = "ep93xx-i2s",
 792         .id             = -1,
 793         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 794         .resource       = ep93xx_i2s_resource,
 795 };
 796
 797 static struct platform_device ep93xx_pcm_device = {
 798         .name           = "ep93xx-pcm-audio",
 799         .id             = -1,
 800 };
 801
 802 void __init ep93xx_register_i2s(void)
 803 {
 804         platform_device_register(&ep93xx_i2s_device);
 805         platform_device_register(&ep93xx_pcm_device);
 806 }
 807
 808 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 809                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 810
 811 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 812                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 813
 814 int ep93xx_i2s_acquire(unsigned i2s_pins, unsigned i2s_config)
 815 {
 816         unsigned val;
 817
 818         /* Sanity check */
 819         if (i2s_pins & ~EP93XX_SYSCON_DEVCFG_I2S_MASK)
 820                 return -EINVAL;
 821         if (i2s_config & ~EP93XX_I2SCLKDIV_MASK)
 822                 return -EINVAL;
 823
 824         /* Must have only one of I2SONSSP/I2SONAC97 set */
 825         if ((i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONSSP) ==
 826             (i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONAC97))
 827                 return -EINVAL;
 828
 829         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 830         ep93xx_devcfg_set_bits(i2s_pins);
 831
 832         /*
 833          * This is potentially racy with the clock api for i2s_mclk, sclk and
 834          * lrclk. Since the i2s driver is the only user of those clocks we
 835          * rely on it to prevent parallel use of this function and the
 836          * clock api for the i2s clocks.
 837          */
 838         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 839         val &= ~EP93XX_I2SCLKDIV_MASK;
 840         val |= i2s_config;
 841         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 842
 843         return 0;
 844 }
 845 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 846
 847 void ep93xx_i2s_release(void)
 848 {
 849         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 850 }
 851 EXPORT_SYMBOL(ep93xx_i2s_release);
 852
 853 /*************************************************************************
 854  * EP93xx AC97 audio peripheral handling
 855  *************************************************************************/
 856 static struct resource ep93xx_ac97_resources[] = {
 857         {
 858                 .start  = EP93XX_AAC_PHYS_BASE,
 859                 .end    = EP93XX_AAC_PHYS_BASE + 0xac - 1,
 860                 .flags  = IORESOURCE_MEM,
 861         },
 862         {
 863                 .start  = IRQ_EP93XX_AACINTR,
 864                 .end    = IRQ_EP93XX_AACINTR,
 865                 .flags  = IORESOURCE_IRQ,
 866         },
 867 };
 868
 869 static struct platform_device ep93xx_ac97_device = {
 870         .name           = "ep93xx-ac97",
 871         .id             = -1,
 872         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 873         .resource       = ep93xx_ac97_resources,
 874 };
 875
 876 void __init ep93xx_register_ac97(void)
 877 {
 878         /*
 879          * Make sure that the AC97 pins are not used by I2S.
 880          */
 881         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 882
 883         platform_device_register(&ep93xx_ac97_device);
 884         platform_device_register(&ep93xx_pcm_device);
 885 }
 886
 887 void __init ep93xx_init_devices(void)
 888 {
 889         /* Disallow access to MaverickCrunch initially */
 890         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 891
 892         /* Get the GPIO working early, other devices need it */
 893         platform_device_register(&ep93xx_gpio_device);
 894
 895         amba_device_register(&uart1_device, &iomem_resource);
 896         amba_device_register(&uart2_device, &iomem_resource);
 897         amba_device_register(&uart3_device, &iomem_resource);
 898
 899         platform_device_register(&ep93xx_rtc_device);
 900         platform_device_register(&ep93xx_ohci_device);
 901         platform_device_register(&ep93xx_leds);
 902 }