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 #include <linux/export.h>
  37 #include <linux/irqchip/arm-vic.h>
  38
  39 #include <mach/hardware.h>
  40 #include <linux/platform_data/video-ep93xx.h>
  41 #include <linux/platform_data/keypad-ep93xx.h>
  42 #include <linux/platform_data/spi-ep93xx.h>
  43 #include <mach/gpio-ep93xx.h>
  44
  45 #include <asm/mach/map.h>
  46 #include <asm/mach/time.h>
  47
  48 #include "soc.h"
  49
  50 /*************************************************************************
  51  * Static I/O mappings that are needed for all EP93xx platforms
  52  *************************************************************************/
  53 static struct map_desc ep93xx_io_desc[] __initdata = {
  54         {
  55                 .virtual        = EP93XX_AHB_VIRT_BASE,
  56                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  57                 .length         = EP93XX_AHB_SIZE,
  58                 .type           = MT_DEVICE,
  59         }, {
  60                 .virtual        = EP93XX_APB_VIRT_BASE,
  61                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  62                 .length         = EP93XX_APB_SIZE,
  63                 .type           = MT_DEVICE,
  64         },
  65 };
  66
  67 void __init ep93xx_map_io(void)
  68 {
  69         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  70 }
  71
  72
  73 /*************************************************************************
  74  * Timer handling for EP93xx
  75  *************************************************************************
  76  * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
  77  * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
  78  * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
  79  * is free-running, and can't generate interrupts.
  80  *
  81  * The 508 kHz timers are ideal for use for the timer interrupt, as the
  82  * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
  83  * bit timers (timer 1) since we don't need more than 16 bits of reload
  84  * value as long as HZ >= 8.
  85  *
  86  * The higher clock rate of timer 4 makes it a better choice than the
  87  * other timers for use in gettimeoffset(), while the fact that it can't
  88  * generate interrupts means we don't have to worry about not being able
  89  * to use this timer for something else.  We also use timer 4 for keeping
  90  * track of lost jiffies.
  91  */
  92 #define EP93XX_TIMER_REG(x)             (EP93XX_TIMER_BASE + (x))
  93 #define EP93XX_TIMER1_LOAD              EP93XX_TIMER_REG(0x00)
  94 #define EP93XX_TIMER1_VALUE             EP93XX_TIMER_REG(0x04)
  95 #define EP93XX_TIMER1_CONTROL           EP93XX_TIMER_REG(0x08)
  96 #define EP93XX_TIMER123_CONTROL_ENABLE  (1 << 7)
  97 #define EP93XX_TIMER123_CONTROL_MODE    (1 << 6)
  98 #define EP93XX_TIMER123_CONTROL_CLKSEL  (1 << 3)
  99 #define EP93XX_TIMER1_CLEAR             EP93XX_TIMER_REG(0x0c)
 100 #define EP93XX_TIMER2_LOAD              EP93XX_TIMER_REG(0x20)
 101 #define EP93XX_TIMER2_VALUE             EP93XX_TIMER_REG(0x24)
 102 #define EP93XX_TIMER2_CONTROL           EP93XX_TIMER_REG(0x28)
 103 #define EP93XX_TIMER2_CLEAR             EP93XX_TIMER_REG(0x2c)
 104 #define EP93XX_TIMER4_VALUE_LOW         EP93XX_TIMER_REG(0x60)
 105 #define EP93XX_TIMER4_VALUE_HIGH        EP93XX_TIMER_REG(0x64)
 106 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
 107 #define EP93XX_TIMER3_LOAD              EP93XX_TIMER_REG(0x80)
 108 #define EP93XX_TIMER3_VALUE             EP93XX_TIMER_REG(0x84)
 109 #define EP93XX_TIMER3_CONTROL           EP93XX_TIMER_REG(0x88)
 110 #define EP93XX_TIMER3_CLEAR             EP93XX_TIMER_REG(0x8c)
 111
 112 #define EP93XX_TIMER123_CLOCK           508469
 113 #define EP93XX_TIMER4_CLOCK             983040
 114
 115 #define TIMER1_RELOAD                   ((EP93XX_TIMER123_CLOCK / HZ) - 1)
 116 #define TIMER4_TICKS_PER_JIFFY          DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 117
 118 static unsigned int last_jiffy_time;
 119
 120 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 121 {
 122         /* Writing any value clears the timer interrupt */
 123         __raw_writel(1, EP93XX_TIMER1_CLEAR);
 124
 125         /* Recover lost jiffies */
 126         while ((signed long)
 127                 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
 128                                                 >= TIMER4_TICKS_PER_JIFFY) {
 129                 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
 130                 timer_tick();
 131         }
 132
 133         return IRQ_HANDLED;
 134 }
 135
 136 static struct irqaction ep93xx_timer_irq = {
 137         .name           = "ep93xx timer",
 138         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 139         .handler        = ep93xx_timer_interrupt,
 140 };
 141
 142 static u32 ep93xx_gettimeoffset(void)
 143 {
 144         int offset;
 145
 146         offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
 147
 148         /*
 149          * Timer 4 is based on a 983.04 kHz reference clock,
 150          * so dividing by 983040 gives the fraction of a second,
 151          * so dividing by 0.983040 converts to uS.
 152          * Refactor the calculation to avoid overflow.
 153          * Finally, multiply by 1000 to give nS.
 154          */
 155         return (offset + (53 * offset / 3072)) * 1000;
 156 }
 157
 158 void __init ep93xx_timer_init(void)
 159 {
 160         u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
 161                     EP93XX_TIMER123_CONTROL_CLKSEL;
 162
 163         arch_gettimeoffset = ep93xx_gettimeoffset;
 164
 165         /* Enable periodic HZ timer.  */
 166         __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
 167         __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
 168         __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
 169                         EP93XX_TIMER1_CONTROL);
 170
 171         /* Enable lost jiffy timer.  */
 172         __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
 173                         EP93XX_TIMER4_VALUE_HIGH);
 174
 175         setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
 176 }
 177
 178
 179 /*************************************************************************
 180  * EP93xx IRQ handling
 181  *************************************************************************/
 182 void __init ep93xx_init_irq(void)
 183 {
 184         vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
 185         vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
 186 }
 187
 188
 189 /*************************************************************************
 190  * EP93xx System Controller Software Locked register handling
 191  *************************************************************************/
 192
 193 /*
 194  * syscon_swlock prevents anything else from writing to the syscon
 195  * block while a software locked register is being written.
 196  */
 197 static DEFINE_SPINLOCK(syscon_swlock);
 198
 199 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
 200 {
 201         unsigned long flags;
 202
 203         spin_lock_irqsave(&syscon_swlock, flags);
 204
 205         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 206         __raw_writel(val, reg);
 207
 208         spin_unlock_irqrestore(&syscon_swlock, flags);
 209 }
 210
 211 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 212 {
 213         unsigned long flags;
 214         unsigned int val;
 215
 216         spin_lock_irqsave(&syscon_swlock, flags);
 217
 218         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 219         val &= ~clear_bits;
 220         val |= set_bits;
 221         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 222         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 223
 224         spin_unlock_irqrestore(&syscon_swlock, flags);
 225 }
 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 GPIO
 244  *************************************************************************/
 245 static struct resource ep93xx_gpio_resource[] = {
 246         DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
 247 };
 248
 249 static struct platform_device ep93xx_gpio_device = {
 250         .name           = "gpio-ep93xx",
 251         .id             = -1,
 252         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 253         .resource       = ep93xx_gpio_resource,
 254 };
 255
 256 /*************************************************************************
 257  * EP93xx peripheral handling
 258  *************************************************************************/
 259 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 260
 261 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 262                                   void __iomem *base, unsigned int mctrl)
 263 {
 264         unsigned int mcr;
 265
 266         mcr = 0;
 267         if (mctrl & TIOCM_RTS)
 268                 mcr |= 2;
 269         if (mctrl & TIOCM_DTR)
 270                 mcr |= 1;
 271
 272         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 273 }
 274
 275 static struct amba_pl010_data ep93xx_uart_data = {
 276         .set_mctrl      = ep93xx_uart_set_mctrl,
 277 };
 278
 279 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
 280         { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
 281
 282 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
 283         { IRQ_EP93XX_UART2 }, &ep93xx_uart_data);
 284
 285 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
 286         { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
 287
 288 static struct resource ep93xx_rtc_resource[] = {
 289         DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
 290 };
 291
 292 static struct platform_device ep93xx_rtc_device = {
 293         .name           = "ep93xx-rtc",
 294         .id             = -1,
 295         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 296         .resource       = ep93xx_rtc_resource,
 297 };
 298
 299
 300 static struct resource ep93xx_ohci_resources[] = {
 301         DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
 302         DEFINE_RES_IRQ(IRQ_EP93XX_USB),
 303 };
 304
 305
 306 static struct platform_device ep93xx_ohci_device = {
 307         .name           = "ep93xx-ohci",
 308         .id             = -1,
 309         .dev            = {
 310                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 311                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 312         },
 313         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 314         .resource       = ep93xx_ohci_resources,
 315 };
 316
 317
 318 /*************************************************************************
 319  * EP93xx physmap'ed flash
 320  *************************************************************************/
 321 static struct physmap_flash_data ep93xx_flash_data;
 322
 323 static struct resource ep93xx_flash_resource = {
 324         .flags          = IORESOURCE_MEM,
 325 };
 326
 327 static struct platform_device ep93xx_flash = {
 328         .name           = "physmap-flash",
 329         .id             = 0,
 330         .dev            = {
 331                 .platform_data  = &ep93xx_flash_data,
 332         },
 333         .num_resources  = 1,
 334         .resource       = &ep93xx_flash_resource,
 335 };
 336
 337 /**
 338  * ep93xx_register_flash() - Register the external flash device.
 339  * @width:      bank width in octets
 340  * @start:      resource start address
 341  * @size:       resource size
 342  */
 343 void __init ep93xx_register_flash(unsigned int width,
 344                                   resource_size_t start, resource_size_t size)
 345 {
 346         ep93xx_flash_data.width         = width;
 347
 348         ep93xx_flash_resource.start     = start;
 349         ep93xx_flash_resource.end       = start + size - 1;
 350
 351         platform_device_register(&ep93xx_flash);
 352 }
 353
 354
 355 /*************************************************************************
 356  * EP93xx ethernet peripheral handling
 357  *************************************************************************/
 358 static struct ep93xx_eth_data ep93xx_eth_data;
 359
 360 static struct resource ep93xx_eth_resource[] = {
 361         DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
 362         DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
 363 };
 364
 365 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 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                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 373                 .dma_mask               = &ep93xx_eth_dma_mask,
 374         },
 375         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 376         .resource       = ep93xx_eth_resource,
 377 };
 378
 379 /**
 380  * ep93xx_register_eth - Register the built-in ethernet platform device.
 381  * @data:       platform specific ethernet configuration (__initdata)
 382  * @copy_addr:  flag indicating that the MAC address should be copied
 383  *              from the IndAd registers (as programmed by the bootloader)
 384  */
 385 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 386 {
 387         if (copy_addr)
 388                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 389
 390         ep93xx_eth_data = *data;
 391         platform_device_register(&ep93xx_eth_device);
 392 }
 393
 394
 395 /*************************************************************************
 396  * EP93xx i2c peripheral handling
 397  *************************************************************************/
 398 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 399
 400 static struct platform_device ep93xx_i2c_device = {
 401         .name           = "i2c-gpio",
 402         .id             = 0,
 403         .dev            = {
 404                 .platform_data  = &ep93xx_i2c_data,
 405         },
 406 };
 407
 408 /**
 409  * ep93xx_register_i2c - Register the i2c platform device.
 410  * @data:       platform specific i2c-gpio configuration (__initdata)
 411  * @devices:    platform specific i2c bus device information (__initdata)
 412  * @num:        the number of devices on the i2c bus
 413  */
 414 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 415                                 struct i2c_board_info *devices, int num)
 416 {
 417         /*
 418          * Set the EEPROM interface pin drive type control.
 419          * Defines the driver type for the EECLK and EEDAT pins as either
 420          * open drain, which will require an external pull-up, or a normal
 421          * CMOS driver.
 422          */
 423         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 424                 pr_warning("sda != EEDAT, open drain has no effect\n");
 425         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 426                 pr_warning("scl != EECLK, open drain has no effect\n");
 427
 428         __raw_writel((data->sda_is_open_drain << 1) |
 429                      (data->scl_is_open_drain << 0),
 430                      EP93XX_GPIO_EEDRIVE);
 431
 432         ep93xx_i2c_data = *data;
 433         i2c_register_board_info(0, devices, num);
 434         platform_device_register(&ep93xx_i2c_device);
 435 }
 436
 437 /*************************************************************************
 438  * EP93xx SPI peripheral handling
 439  *************************************************************************/
 440 static struct ep93xx_spi_info ep93xx_spi_master_data;
 441
 442 static struct resource ep93xx_spi_resources[] = {
 443         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 444         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 445 };
 446
 447 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 448
 449 static struct platform_device ep93xx_spi_device = {
 450         .name           = "ep93xx-spi",
 451         .id             = 0,
 452         .dev            = {
 453                 .platform_data          = &ep93xx_spi_master_data,
 454                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 455                 .dma_mask               = &ep93xx_spi_dma_mask,
 456         },
 457         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 458         .resource       = ep93xx_spi_resources,
 459 };
 460
 461 /**
 462  * ep93xx_register_spi() - registers spi platform device
 463  * @info: ep93xx board specific spi master info (__initdata)
 464  * @devices: SPI devices to register (__initdata)
 465  * @num: number of SPI devices to register
 466  *
 467  * This function registers platform device for the EP93xx SPI controller and
 468  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 469  */
 470 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 471                                 struct spi_board_info *devices, int num)
 472 {
 473         /*
 474          * When SPI is used, we need to make sure that I2S is muxed off from
 475          * SPI pins.
 476          */
 477         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 478
 479         ep93xx_spi_master_data = *info;
 480         spi_register_board_info(devices, num);
 481         platform_device_register(&ep93xx_spi_device);
 482 }
 483
 484 /*************************************************************************
 485  * EP93xx LEDs
 486  *************************************************************************/
 487 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 488         {
 489                 .name   = "platform:grled",
 490                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 491         }, {
 492                 .name   = "platform:rdled",
 493                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 494         },
 495 };
 496
 497 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
 498         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 499         .leds           = ep93xx_led_pins,
 500 };
 501
 502 /*************************************************************************
 503  * EP93xx pwm peripheral handling
 504  *************************************************************************/
 505 static struct resource ep93xx_pwm0_resource[] = {
 506         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 507 };
 508
 509 static struct platform_device ep93xx_pwm0_device = {
 510         .name           = "ep93xx-pwm",
 511         .id             = 0,
 512         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 513         .resource       = ep93xx_pwm0_resource,
 514 };
 515
 516 static struct resource ep93xx_pwm1_resource[] = {
 517         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 518 };
 519
 520 static struct platform_device ep93xx_pwm1_device = {
 521         .name           = "ep93xx-pwm",
 522         .id             = 1,
 523         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 524         .resource       = ep93xx_pwm1_resource,
 525 };
 526
 527 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 528 {
 529         if (pwm0)
 530                 platform_device_register(&ep93xx_pwm0_device);
 531
 532         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 533         if (pwm1)
 534                 platform_device_register(&ep93xx_pwm1_device);
 535 }
 536
 537 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 538 {
 539         int err;
 540
 541         if (pdev->id == 0) {
 542                 err = 0;
 543         } else if (pdev->id == 1) {
 544                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 545                                    dev_name(&pdev->dev));
 546                 if (err)
 547                         return err;
 548                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 549                 if (err)
 550                         goto fail;
 551
 552                 /* PWM 1 output on EGPIO[14] */
 553                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 554         } else {
 555                 err = -ENODEV;
 556         }
 557
 558         return err;
 559
 560 fail:
 561         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 562         return err;
 563 }
 564 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 565
 566 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 567 {
 568         if (pdev->id == 1) {
 569                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 570                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 571
 572                 /* EGPIO[14] used for GPIO */
 573                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 574         }
 575 }
 576 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 577
 578
 579 /*************************************************************************
 580  * EP93xx video peripheral handling
 581  *************************************************************************/
 582 static struct ep93xxfb_mach_info ep93xxfb_data;
 583
 584 static struct resource ep93xx_fb_resource[] = {
 585         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 586 };
 587
 588 static struct platform_device ep93xx_fb_device = {
 589         .name                   = "ep93xx-fb",
 590         .id                     = -1,
 591         .dev                    = {
 592                 .platform_data          = &ep93xxfb_data,
 593                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 594                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 595         },
 596         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 597         .resource               = ep93xx_fb_resource,
 598 };
 599
 600 /* The backlight use a single register in the framebuffer's register space */
 601 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 602
 603 static struct resource ep93xx_bl_resources[] = {
 604         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 605                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 606 };
 607
 608 static struct platform_device ep93xx_bl_device = {
 609         .name           = "ep93xx-bl",
 610         .id             = -1,
 611         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 612         .resource       = ep93xx_bl_resources,
 613 };
 614
 615 /**
 616  * ep93xx_register_fb - Register the framebuffer platform device.
 617  * @data:       platform specific framebuffer configuration (__initdata)
 618  */
 619 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 620 {
 621         ep93xxfb_data = *data;
 622         platform_device_register(&ep93xx_fb_device);
 623         platform_device_register(&ep93xx_bl_device);
 624 }
 625
 626
 627 /*************************************************************************
 628  * EP93xx matrix keypad peripheral handling
 629  *************************************************************************/
 630 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 631
 632 static struct resource ep93xx_keypad_resource[] = {
 633         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 634         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 635 };
 636
 637 static struct platform_device ep93xx_keypad_device = {
 638         .name           = "ep93xx-keypad",
 639         .id             = -1,
 640         .dev            = {
 641                 .platform_data  = &ep93xx_keypad_data,
 642         },
 643         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 644         .resource       = ep93xx_keypad_resource,
 645 };
 646
 647 /**
 648  * ep93xx_register_keypad - Register the keypad platform device.
 649  * @data:       platform specific keypad configuration (__initdata)
 650  */
 651 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 652 {
 653         ep93xx_keypad_data = *data;
 654         platform_device_register(&ep93xx_keypad_device);
 655 }
 656
 657 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 658 {
 659         int err;
 660         int i;
 661
 662         for (i = 0; i < 8; i++) {
 663                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 664                 if (err)
 665                         goto fail_gpio_c;
 666                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 667                 if (err)
 668                         goto fail_gpio_d;
 669         }
 670
 671         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 672         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 673                                  EP93XX_SYSCON_DEVCFG_GONK);
 674
 675         return 0;
 676
 677 fail_gpio_d:
 678         gpio_free(EP93XX_GPIO_LINE_C(i));
 679 fail_gpio_c:
 680         for (--i; i >= 0; --i) {
 681                 gpio_free(EP93XX_GPIO_LINE_C(i));
 682                 gpio_free(EP93XX_GPIO_LINE_D(i));
 683         }
 684         return err;
 685 }
 686 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 687
 688 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 689 {
 690         int i;
 691
 692         for (i = 0; i < 8; i++) {
 693                 gpio_free(EP93XX_GPIO_LINE_C(i));
 694                 gpio_free(EP93XX_GPIO_LINE_D(i));
 695         }
 696
 697         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 698         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 699                                EP93XX_SYSCON_DEVCFG_GONK);
 700 }
 701 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 702
 703 /*************************************************************************
 704  * EP93xx I2S audio peripheral handling
 705  *************************************************************************/
 706 static struct resource ep93xx_i2s_resource[] = {
 707         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 708 };
 709
 710 static struct platform_device ep93xx_i2s_device = {
 711         .name           = "ep93xx-i2s",
 712         .id             = -1,
 713         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 714         .resource       = ep93xx_i2s_resource,
 715 };
 716
 717 static struct platform_device ep93xx_pcm_device = {
 718         .name           = "ep93xx-pcm-audio",
 719         .id             = -1,
 720 };
 721
 722 void __init ep93xx_register_i2s(void)
 723 {
 724         platform_device_register(&ep93xx_i2s_device);
 725         platform_device_register(&ep93xx_pcm_device);
 726 }
 727
 728 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 729                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 730
 731 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 732                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 733
 734 int ep93xx_i2s_acquire(void)
 735 {
 736         unsigned val;
 737
 738         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 739                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 740
 741         /*
 742          * This is potentially racy with the clock api for i2s_mclk, sclk and
 743          * lrclk. Since the i2s driver is the only user of those clocks we
 744          * rely on it to prevent parallel use of this function and the
 745          * clock api for the i2s clocks.
 746          */
 747         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 748         val &= ~EP93XX_I2SCLKDIV_MASK;
 749         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 750         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 751
 752         return 0;
 753 }
 754 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 755
 756 void ep93xx_i2s_release(void)
 757 {
 758         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 759 }
 760 EXPORT_SYMBOL(ep93xx_i2s_release);
 761
 762 /*************************************************************************
 763  * EP93xx AC97 audio peripheral handling
 764  *************************************************************************/
 765 static struct resource ep93xx_ac97_resources[] = {
 766         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 767         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 768 };
 769
 770 static struct platform_device ep93xx_ac97_device = {
 771         .name           = "ep93xx-ac97",
 772         .id             = -1,
 773         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 774         .resource       = ep93xx_ac97_resources,
 775 };
 776
 777 void __init ep93xx_register_ac97(void)
 778 {
 779         /*
 780          * Make sure that the AC97 pins are not used by I2S.
 781          */
 782         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 783
 784         platform_device_register(&ep93xx_ac97_device);
 785         platform_device_register(&ep93xx_pcm_device);
 786 }
 787
 788 /*************************************************************************
 789  * EP93xx Watchdog
 790  *************************************************************************/
 791 static struct resource ep93xx_wdt_resources[] = {
 792         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 793 };
 794
 795 static struct platform_device ep93xx_wdt_device = {
 796         .name           = "ep93xx-wdt",
 797         .id             = -1,
 798         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 799         .resource       = ep93xx_wdt_resources,
 800 };
 801
 802 /*************************************************************************
 803  * EP93xx IDE
 804  *************************************************************************/
 805 static struct resource ep93xx_ide_resources[] = {
 806         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 807         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 808 };
 809
 810 static struct platform_device ep93xx_ide_device = {
 811         .name           = "ep93xx-ide",
 812         .id             = -1,
 813         .dev            = {
 814                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 815                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 816         },
 817         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 818         .resource       = ep93xx_ide_resources,
 819 };
 820
 821 void __init ep93xx_register_ide(void)
 822 {
 823         platform_device_register(&ep93xx_ide_device);
 824 }
 825
 826 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 827 {
 828         int err;
 829         int i;
 830
 831         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 832         if (err)
 833                 return err;
 834         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 835         if (err)
 836                 goto fail_egpio15;
 837         for (i = 2; i < 8; i++) {
 838                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 839                 if (err)
 840                         goto fail_gpio_e;
 841         }
 842         for (i = 4; i < 8; i++) {
 843                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 844                 if (err)
 845                         goto fail_gpio_g;
 846         }
 847         for (i = 0; i < 8; i++) {
 848                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 849                 if (err)
 850                         goto fail_gpio_h;
 851         }
 852
 853         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 854         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 855                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 856                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 857         return 0;
 858
 859 fail_gpio_h:
 860         for (--i; i >= 0; --i)
 861                 gpio_free(EP93XX_GPIO_LINE_H(i));
 862         i = 8;
 863 fail_gpio_g:
 864         for (--i; i >= 4; --i)
 865                 gpio_free(EP93XX_GPIO_LINE_G(i));
 866         i = 8;
 867 fail_gpio_e:
 868         for (--i; i >= 2; --i)
 869                 gpio_free(EP93XX_GPIO_LINE_E(i));
 870         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 871 fail_egpio15:
 872         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 873         return err;
 874 }
 875 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 876
 877 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 878 {
 879         int i;
 880
 881         for (i = 2; i < 8; i++)
 882                 gpio_free(EP93XX_GPIO_LINE_E(i));
 883         for (i = 4; i < 8; i++)
 884                 gpio_free(EP93XX_GPIO_LINE_G(i));
 885         for (i = 0; i < 8; i++)
 886                 gpio_free(EP93XX_GPIO_LINE_H(i));
 887         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 888         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 889
 890
 891         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 892         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 893                                EP93XX_SYSCON_DEVCFG_GONIDE |
 894                                EP93XX_SYSCON_DEVCFG_HONIDE);
 895 }
 896 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 897
 898 void __init ep93xx_init_devices(void)
 899 {
 900         /* Disallow access to MaverickCrunch initially */
 901         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 902
 903         /* Default all ports to GPIO */
 904         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 905                                EP93XX_SYSCON_DEVCFG_GONK |
 906                                EP93XX_SYSCON_DEVCFG_EONIDE |
 907                                EP93XX_SYSCON_DEVCFG_GONIDE |
 908                                EP93XX_SYSCON_DEVCFG_HONIDE);
 909
 910         /* Get the GPIO working early, other devices need it */
 911         platform_device_register(&ep93xx_gpio_device);
 912
 913         amba_device_register(&uart1_device, &iomem_resource);
 914         amba_device_register(&uart2_device, &iomem_resource);
 915         amba_device_register(&uart3_device, &iomem_resource);
 916
 917         platform_device_register(&ep93xx_rtc_device);
 918         platform_device_register(&ep93xx_ohci_device);
 919         platform_device_register(&ep93xx_wdt_device);
 920
 921         gpio_led_register_device(-1, &ep93xx_led_data);
 922 }
 923
 924 void ep93xx_restart(char mode, const char *cmd)
 925 {
 926         /*
 927          * Set then clear the SWRST bit to initiate a software reset
 928          */
 929         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 930         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 931
 932         while (1)
 933                 ;
 934 }
 935
 936 void __init ep93xx_init_late(void)
 937 {
 938         crunch_init();
 939 }