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
  38 #include <mach/hardware.h>
  39 #include <mach/fb.h>
  40 #include <mach/ep93xx_keypad.h>
  41 #include <mach/ep93xx_spi.h>
  42
  43 #include <asm/mach/map.h>
  44 #include <asm/mach/time.h>
  45
  46 #include <asm/hardware/vic.h>
  47
  48
  49 /*************************************************************************
  50  * Static I/O mappings that are needed for all EP93xx platforms
  51  *************************************************************************/
  52 static struct map_desc ep93xx_io_desc[] __initdata = {
  53         {
  54                 .virtual        = EP93XX_AHB_VIRT_BASE,
  55                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  56                 .length         = EP93XX_AHB_SIZE,
  57                 .type           = MT_DEVICE,
  58         }, {
  59                 .virtual        = EP93XX_APB_VIRT_BASE,
  60                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  61                 .length         = EP93XX_APB_SIZE,
  62                 .type           = MT_DEVICE,
  63         },
  64 };
  65
  66 void __init ep93xx_map_io(void)
  67 {
  68         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  69 }
  70
  71
  72 /*************************************************************************
  73  * Timer handling for EP93xx
  74  *************************************************************************
  75  * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
  76  * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
  77  * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
  78  * is free-running, and can't generate interrupts.
  79  *
  80  * The 508 kHz timers are ideal for use for the timer interrupt, as the
  81  * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
  82  * bit timers (timer 1) since we don't need more than 16 bits of reload
  83  * value as long as HZ >= 8.
  84  *
  85  * The higher clock rate of timer 4 makes it a better choice than the
  86  * other timers for use in gettimeoffset(), while the fact that it can't
  87  * generate interrupts means we don't have to worry about not being able
  88  * to use this timer for something else.  We also use timer 4 for keeping
  89  * track of lost jiffies.
  90  */
  91 #define EP93XX_TIMER_REG(x)             (EP93XX_TIMER_BASE + (x))
  92 #define EP93XX_TIMER1_LOAD              EP93XX_TIMER_REG(0x00)
  93 #define EP93XX_TIMER1_VALUE             EP93XX_TIMER_REG(0x04)
  94 #define EP93XX_TIMER1_CONTROL           EP93XX_TIMER_REG(0x08)
  95 #define EP93XX_TIMER123_CONTROL_ENABLE  (1 << 7)
  96 #define EP93XX_TIMER123_CONTROL_MODE    (1 << 6)
  97 #define EP93XX_TIMER123_CONTROL_CLKSEL  (1 << 3)
  98 #define EP93XX_TIMER1_CLEAR             EP93XX_TIMER_REG(0x0c)
  99 #define EP93XX_TIMER2_LOAD              EP93XX_TIMER_REG(0x20)
 100 #define EP93XX_TIMER2_VALUE             EP93XX_TIMER_REG(0x24)
 101 #define EP93XX_TIMER2_CONTROL           EP93XX_TIMER_REG(0x28)
 102 #define EP93XX_TIMER2_CLEAR             EP93XX_TIMER_REG(0x2c)
 103 #define EP93XX_TIMER4_VALUE_LOW         EP93XX_TIMER_REG(0x60)
 104 #define EP93XX_TIMER4_VALUE_HIGH        EP93XX_TIMER_REG(0x64)
 105 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
 106 #define EP93XX_TIMER3_LOAD              EP93XX_TIMER_REG(0x80)
 107 #define EP93XX_TIMER3_VALUE             EP93XX_TIMER_REG(0x84)
 108 #define EP93XX_TIMER3_CONTROL           EP93XX_TIMER_REG(0x88)
 109 #define EP93XX_TIMER3_CLEAR             EP93XX_TIMER_REG(0x8c)
 110
 111 #define EP93XX_TIMER123_CLOCK           508469
 112 #define EP93XX_TIMER4_CLOCK             983040
 113
 114 #define TIMER1_RELOAD                   ((EP93XX_TIMER123_CLOCK / HZ) - 1)
 115 #define TIMER4_TICKS_PER_JIFFY          DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 116
 117 static unsigned int last_jiffy_time;
 118
 119 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 120 {
 121         /* Writing any value clears the timer interrupt */
 122         __raw_writel(1, EP93XX_TIMER1_CLEAR);
 123
 124         /* Recover lost jiffies */
 125         while ((signed long)
 126                 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
 127                                                 >= TIMER4_TICKS_PER_JIFFY) {
 128                 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
 129                 timer_tick();
 130         }
 131
 132         return IRQ_HANDLED;
 133 }
 134
 135 static struct irqaction ep93xx_timer_irq = {
 136         .name           = "ep93xx timer",
 137         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 138         .handler        = ep93xx_timer_interrupt,
 139 };
 140
 141 static void __init ep93xx_timer_init(void)
 142 {
 143         u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
 144                     EP93XX_TIMER123_CONTROL_CLKSEL;
 145
 146         /* Enable periodic HZ timer.  */
 147         __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
 148         __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
 149         __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
 150                         EP93XX_TIMER1_CONTROL);
 151
 152         /* Enable lost jiffy timer.  */
 153         __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
 154                         EP93XX_TIMER4_VALUE_HIGH);
 155
 156         setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
 157 }
 158
 159 static unsigned long ep93xx_gettimeoffset(void)
 160 {
 161         int offset;
 162
 163         offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
 164
 165         /* Calculate (1000000 / 983040) * offset.  */
 166         return offset + (53 * offset / 3072);
 167 }
 168
 169 struct sys_timer ep93xx_timer = {
 170         .init           = ep93xx_timer_init,
 171         .offset         = ep93xx_gettimeoffset,
 172 };
 173
 174
 175 /*************************************************************************
 176  * EP93xx IRQ handling
 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
 184
 185 /*************************************************************************
 186  * EP93xx System Controller Software Locked register handling
 187  *************************************************************************/
 188
 189 /*
 190  * syscon_swlock prevents anything else from writing to the syscon
 191  * block while a software locked register is being written.
 192  */
 193 static DEFINE_SPINLOCK(syscon_swlock);
 194
 195 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
 196 {
 197         unsigned long flags;
 198
 199         spin_lock_irqsave(&syscon_swlock, flags);
 200
 201         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 202         __raw_writel(val, reg);
 203
 204         spin_unlock_irqrestore(&syscon_swlock, flags);
 205 }
 206 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write);
 207
 208 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 209 {
 210         unsigned long flags;
 211         unsigned int val;
 212
 213         spin_lock_irqsave(&syscon_swlock, flags);
 214
 215         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 216         val &= ~clear_bits;
 217         val |= set_bits;
 218         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 219         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 220
 221         spin_unlock_irqrestore(&syscon_swlock, flags);
 222 }
 223 EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
 224
 225 /**
 226  * ep93xx_chip_revision() - returns the EP93xx chip revision
 227  *
 228  * See <mach/platform.h> for more information.
 229  */
 230 unsigned int ep93xx_chip_revision(void)
 231 {
 232         unsigned int v;
 233
 234         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 235         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 236         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 237         return v;
 238 }
 239
 240 /*************************************************************************
 241  * EP93xx GPIO
 242  *************************************************************************/
 243 static struct resource ep93xx_gpio_resource[] = {
 244         {
 245                 .start          = EP93XX_GPIO_PHYS_BASE,
 246                 .end            = EP93XX_GPIO_PHYS_BASE + 0xcc - 1,
 247                 .flags          = IORESOURCE_MEM,
 248         },
 249 };
 250
 251 static struct platform_device ep93xx_gpio_device = {
 252         .name           = "gpio-ep93xx",
 253         .id             = -1,
 254         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 255         .resource       = ep93xx_gpio_resource,
 256 };
 257
 258 /*************************************************************************
 259  * EP93xx peripheral handling
 260  *************************************************************************/
 261 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 262
 263 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 264                                   void __iomem *base, unsigned int mctrl)
 265 {
 266         unsigned int mcr;
 267
 268         mcr = 0;
 269         if (mctrl & TIOCM_RTS)
 270                 mcr |= 2;
 271         if (mctrl & TIOCM_DTR)
 272                 mcr |= 1;
 273
 274         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 275 }
 276
 277 static struct amba_pl010_data ep93xx_uart_data = {
 278         .set_mctrl      = ep93xx_uart_set_mctrl,
 279 };
 280
 281 static struct amba_device uart1_device = {
 282         .dev            = {
 283                 .init_name      = "apb:uart1",
 284                 .platform_data  = &ep93xx_uart_data,
 285         },
 286         .res            = {
 287                 .start  = EP93XX_UART1_PHYS_BASE,
 288                 .end    = EP93XX_UART1_PHYS_BASE + 0x0fff,
 289                 .flags  = IORESOURCE_MEM,
 290         },
 291         .irq            = { IRQ_EP93XX_UART1, NO_IRQ },
 292         .periphid       = 0x00041010,
 293 };
 294
 295 static struct amba_device uart2_device = {
 296         .dev            = {
 297                 .init_name      = "apb:uart2",
 298                 .platform_data  = &ep93xx_uart_data,
 299         },
 300         .res            = {
 301                 .start  = EP93XX_UART2_PHYS_BASE,
 302                 .end    = EP93XX_UART2_PHYS_BASE + 0x0fff,
 303                 .flags  = IORESOURCE_MEM,
 304         },
 305         .irq            = { IRQ_EP93XX_UART2, NO_IRQ },
 306         .periphid       = 0x00041010,
 307 };
 308
 309 static struct amba_device uart3_device = {
 310         .dev            = {
 311                 .init_name      = "apb:uart3",
 312                 .platform_data  = &ep93xx_uart_data,
 313         },
 314         .res            = {
 315                 .start  = EP93XX_UART3_PHYS_BASE,
 316                 .end    = EP93XX_UART3_PHYS_BASE + 0x0fff,
 317                 .flags  = IORESOURCE_MEM,
 318         },
 319         .irq            = { IRQ_EP93XX_UART3, NO_IRQ },
 320         .periphid       = 0x00041010,
 321 };
 322
 323
 324 static struct resource ep93xx_rtc_resource[] = {
 325         {
 326                 .start          = EP93XX_RTC_PHYS_BASE,
 327                 .end            = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
 328                 .flags          = IORESOURCE_MEM,
 329         },
 330 };
 331
 332 static struct platform_device ep93xx_rtc_device = {
 333         .name           = "ep93xx-rtc",
 334         .id             = -1,
 335         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 336         .resource       = ep93xx_rtc_resource,
 337 };
 338
 339
 340 static struct resource ep93xx_ohci_resources[] = {
 341         [0] = {
 342                 .start  = EP93XX_USB_PHYS_BASE,
 343                 .end    = EP93XX_USB_PHYS_BASE + 0x0fff,
 344                 .flags  = IORESOURCE_MEM,
 345         },
 346         [1] = {
 347                 .start  = IRQ_EP93XX_USB,
 348                 .end    = IRQ_EP93XX_USB,
 349                 .flags  = IORESOURCE_IRQ,
 350         },
 351 };
 352
 353
 354 static struct platform_device ep93xx_ohci_device = {
 355         .name           = "ep93xx-ohci",
 356         .id             = -1,
 357         .dev            = {
 358                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 359                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 360         },
 361         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 362         .resource       = ep93xx_ohci_resources,
 363 };
 364
 365
 366 /*************************************************************************
 367  * EP93xx physmap'ed flash
 368  *************************************************************************/
 369 static struct physmap_flash_data ep93xx_flash_data;
 370
 371 static struct resource ep93xx_flash_resource = {
 372         .flags          = IORESOURCE_MEM,
 373 };
 374
 375 static struct platform_device ep93xx_flash = {
 376         .name           = "physmap-flash",
 377         .id             = 0,
 378         .dev            = {
 379                 .platform_data  = &ep93xx_flash_data,
 380         },
 381         .num_resources  = 1,
 382         .resource       = &ep93xx_flash_resource,
 383 };
 384
 385 /**
 386  * ep93xx_register_flash() - Register the external flash device.
 387  * @width:      bank width in octets
 388  * @start:      resource start address
 389  * @size:       resource size
 390  */
 391 void __init ep93xx_register_flash(unsigned int width,
 392                                   resource_size_t start, resource_size_t size)
 393 {
 394         ep93xx_flash_data.width         = width;
 395
 396         ep93xx_flash_resource.start     = start;
 397         ep93xx_flash_resource.end       = start + size - 1;
 398
 399         platform_device_register(&ep93xx_flash);
 400 }
 401
 402
 403 /*************************************************************************
 404  * EP93xx ethernet peripheral handling
 405  *************************************************************************/
 406 static struct ep93xx_eth_data ep93xx_eth_data;
 407
 408 static struct resource ep93xx_eth_resource[] = {
 409         {
 410                 .start  = EP93XX_ETHERNET_PHYS_BASE,
 411                 .end    = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
 412                 .flags  = IORESOURCE_MEM,
 413         }, {
 414                 .start  = IRQ_EP93XX_ETHERNET,
 415                 .end    = IRQ_EP93XX_ETHERNET,
 416                 .flags  = IORESOURCE_IRQ,
 417         }
 418 };
 419
 420 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 421
 422 static struct platform_device ep93xx_eth_device = {
 423         .name           = "ep93xx-eth",
 424         .id             = -1,
 425         .dev            = {
 426                 .platform_data          = &ep93xx_eth_data,
 427                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 428                 .dma_mask               = &ep93xx_eth_dma_mask,
 429         },
 430         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 431         .resource       = ep93xx_eth_resource,
 432 };
 433
 434 /**
 435  * ep93xx_register_eth - Register the built-in ethernet platform device.
 436  * @data:       platform specific ethernet configuration (__initdata)
 437  * @copy_addr:  flag indicating that the MAC address should be copied
 438  *              from the IndAd registers (as programmed by the bootloader)
 439  */
 440 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 441 {
 442         if (copy_addr)
 443                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 444
 445         ep93xx_eth_data = *data;
 446         platform_device_register(&ep93xx_eth_device);
 447 }
 448
 449
 450 /*************************************************************************
 451  * EP93xx i2c peripheral handling
 452  *************************************************************************/
 453 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 454
 455 static struct platform_device ep93xx_i2c_device = {
 456         .name           = "i2c-gpio",
 457         .id             = 0,
 458         .dev            = {
 459                 .platform_data  = &ep93xx_i2c_data,
 460         },
 461 };
 462
 463 /**
 464  * ep93xx_register_i2c - Register the i2c platform device.
 465  * @data:       platform specific i2c-gpio configuration (__initdata)
 466  * @devices:    platform specific i2c bus device information (__initdata)
 467  * @num:        the number of devices on the i2c bus
 468  */
 469 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 470                                 struct i2c_board_info *devices, int num)
 471 {
 472         /*
 473          * Set the EEPROM interface pin drive type control.
 474          * Defines the driver type for the EECLK and EEDAT pins as either
 475          * open drain, which will require an external pull-up, or a normal
 476          * CMOS driver.
 477          */
 478         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 479                 pr_warning("sda != EEDAT, open drain has no effect\n");
 480         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 481                 pr_warning("scl != EECLK, open drain has no effect\n");
 482
 483         __raw_writel((data->sda_is_open_drain << 1) |
 484                      (data->scl_is_open_drain << 0),
 485                      EP93XX_GPIO_EEDRIVE);
 486
 487         ep93xx_i2c_data = *data;
 488         i2c_register_board_info(0, devices, num);
 489         platform_device_register(&ep93xx_i2c_device);
 490 }
 491
 492 /*************************************************************************
 493  * EP93xx SPI peripheral handling
 494  *************************************************************************/
 495 static struct ep93xx_spi_info ep93xx_spi_master_data;
 496
 497 static struct resource ep93xx_spi_resources[] = {
 498         {
 499                 .start  = EP93XX_SPI_PHYS_BASE,
 500                 .end    = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
 501                 .flags  = IORESOURCE_MEM,
 502         },
 503         {
 504                 .start  = IRQ_EP93XX_SSP,
 505                 .end    = IRQ_EP93XX_SSP,
 506                 .flags  = IORESOURCE_IRQ,
 507         },
 508 };
 509
 510 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 511
 512 static struct platform_device ep93xx_spi_device = {
 513         .name           = "ep93xx-spi",
 514         .id             = 0,
 515         .dev            = {
 516                 .platform_data          = &ep93xx_spi_master_data,
 517                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 518                 .dma_mask               = &ep93xx_spi_dma_mask,
 519         },
 520         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 521         .resource       = ep93xx_spi_resources,
 522 };
 523
 524 /**
 525  * ep93xx_register_spi() - registers spi platform device
 526  * @info: ep93xx board specific spi master info (__initdata)
 527  * @devices: SPI devices to register (__initdata)
 528  * @num: number of SPI devices to register
 529  *
 530  * This function registers platform device for the EP93xx SPI controller and
 531  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 532  */
 533 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 534                                 struct spi_board_info *devices, int num)
 535 {
 536         /*
 537          * When SPI is used, we need to make sure that I2S is muxed off from
 538          * SPI pins.
 539          */
 540         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 541
 542         ep93xx_spi_master_data = *info;
 543         spi_register_board_info(devices, num);
 544         platform_device_register(&ep93xx_spi_device);
 545 }
 546
 547 /*************************************************************************
 548  * EP93xx LEDs
 549  *************************************************************************/
 550 static struct gpio_led ep93xx_led_pins[] = {
 551         {
 552                 .name   = "platform:grled",
 553                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 554         }, {
 555                 .name   = "platform:rdled",
 556                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 557         },
 558 };
 559
 560 static struct gpio_led_platform_data ep93xx_led_data = {
 561         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 562         .leds           = ep93xx_led_pins,
 563 };
 564
 565 static struct platform_device ep93xx_leds = {
 566         .name           = "leds-gpio",
 567         .id             = -1,
 568         .dev            = {
 569                 .platform_data  = &ep93xx_led_data,
 570         },
 571 };
 572
 573
 574 /*************************************************************************
 575  * EP93xx pwm peripheral handling
 576  *************************************************************************/
 577 static struct resource ep93xx_pwm0_resource[] = {
 578         {
 579                 .start  = EP93XX_PWM_PHYS_BASE,
 580                 .end    = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
 581                 .flags  = IORESOURCE_MEM,
 582         },
 583 };
 584
 585 static struct platform_device ep93xx_pwm0_device = {
 586         .name           = "ep93xx-pwm",
 587         .id             = 0,
 588         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 589         .resource       = ep93xx_pwm0_resource,
 590 };
 591
 592 static struct resource ep93xx_pwm1_resource[] = {
 593         {
 594                 .start  = EP93XX_PWM_PHYS_BASE + 0x20,
 595                 .end    = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
 596                 .flags  = IORESOURCE_MEM,
 597         },
 598 };
 599
 600 static struct platform_device ep93xx_pwm1_device = {
 601         .name           = "ep93xx-pwm",
 602         .id             = 1,
 603         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 604         .resource       = ep93xx_pwm1_resource,
 605 };
 606
 607 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 608 {
 609         if (pwm0)
 610                 platform_device_register(&ep93xx_pwm0_device);
 611
 612         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 613         if (pwm1)
 614                 platform_device_register(&ep93xx_pwm1_device);
 615 }
 616
 617 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 618 {
 619         int err;
 620
 621         if (pdev->id == 0) {
 622                 err = 0;
 623         } else if (pdev->id == 1) {
 624                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 625                                    dev_name(&pdev->dev));
 626                 if (err)
 627                         return err;
 628                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 629                 if (err)
 630                         goto fail;
 631
 632                 /* PWM 1 output on EGPIO[14] */
 633                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 634         } else {
 635                 err = -ENODEV;
 636         }
 637
 638         return err;
 639
 640 fail:
 641         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 642         return err;
 643 }
 644 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 645
 646 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 647 {
 648         if (pdev->id == 1) {
 649                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 650                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 651
 652                 /* EGPIO[14] used for GPIO */
 653                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 654         }
 655 }
 656 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 657
 658
 659 /*************************************************************************
 660  * EP93xx video peripheral handling
 661  *************************************************************************/
 662 static struct ep93xxfb_mach_info ep93xxfb_data;
 663
 664 static struct resource ep93xx_fb_resource[] = {
 665         {
 666                 .start          = EP93XX_RASTER_PHYS_BASE,
 667                 .end            = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
 668                 .flags          = IORESOURCE_MEM,
 669         },
 670 };
 671
 672 static struct platform_device ep93xx_fb_device = {
 673         .name                   = "ep93xx-fb",
 674         .id                     = -1,
 675         .dev                    = {
 676                 .platform_data          = &ep93xxfb_data,
 677                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 678                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 679         },
 680         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 681         .resource               = ep93xx_fb_resource,
 682 };
 683
 684 static struct platform_device ep93xx_bl_device = {
 685         .name           = "ep93xx-bl",
 686         .id             = -1,
 687 };
 688
 689 /**
 690  * ep93xx_register_fb - Register the framebuffer platform device.
 691  * @data:       platform specific framebuffer configuration (__initdata)
 692  */
 693 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 694 {
 695         ep93xxfb_data = *data;
 696         platform_device_register(&ep93xx_fb_device);
 697         platform_device_register(&ep93xx_bl_device);
 698 }
 699
 700
 701 /*************************************************************************
 702  * EP93xx matrix keypad peripheral handling
 703  *************************************************************************/
 704 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 705
 706 static struct resource ep93xx_keypad_resource[] = {
 707         {
 708                 .start  = EP93XX_KEY_MATRIX_PHYS_BASE,
 709                 .end    = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
 710                 .flags  = IORESOURCE_MEM,
 711         }, {
 712                 .start  = IRQ_EP93XX_KEY,
 713                 .end    = IRQ_EP93XX_KEY,
 714                 .flags  = IORESOURCE_IRQ,
 715         },
 716 };
 717
 718 static struct platform_device ep93xx_keypad_device = {
 719         .name           = "ep93xx-keypad",
 720         .id             = -1,
 721         .dev            = {
 722                 .platform_data  = &ep93xx_keypad_data,
 723         },
 724         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 725         .resource       = ep93xx_keypad_resource,
 726 };
 727
 728 /**
 729  * ep93xx_register_keypad - Register the keypad platform device.
 730  * @data:       platform specific keypad configuration (__initdata)
 731  */
 732 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 733 {
 734         ep93xx_keypad_data = *data;
 735         platform_device_register(&ep93xx_keypad_device);
 736 }
 737
 738 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 739 {
 740         int err;
 741         int i;
 742
 743         for (i = 0; i < 8; i++) {
 744                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 745                 if (err)
 746                         goto fail_gpio_c;
 747                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 748                 if (err)
 749                         goto fail_gpio_d;
 750         }
 751
 752         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 753         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 754                                  EP93XX_SYSCON_DEVCFG_GONK);
 755
 756         return 0;
 757
 758 fail_gpio_d:
 759         gpio_free(EP93XX_GPIO_LINE_C(i));
 760 fail_gpio_c:
 761         for ( ; i >= 0; --i) {
 762                 gpio_free(EP93XX_GPIO_LINE_C(i));
 763                 gpio_free(EP93XX_GPIO_LINE_D(i));
 764         }
 765         return err;
 766 }
 767 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 768
 769 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 770 {
 771         int i;
 772
 773         for (i = 0; i < 8; i++) {
 774                 gpio_free(EP93XX_GPIO_LINE_C(i));
 775                 gpio_free(EP93XX_GPIO_LINE_D(i));
 776         }
 777
 778         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 779         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 780                                EP93XX_SYSCON_DEVCFG_GONK);
 781 }
 782 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 783
 784 /*************************************************************************
 785  * EP93xx I2S audio peripheral handling
 786  *************************************************************************/
 787 static struct resource ep93xx_i2s_resource[] = {
 788         {
 789                 .start  = EP93XX_I2S_PHYS_BASE,
 790                 .end    = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
 791                 .flags  = IORESOURCE_MEM,
 792         },
 793 };
 794
 795 static struct platform_device ep93xx_i2s_device = {
 796         .name           = "ep93xx-i2s",
 797         .id             = -1,
 798         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 799         .resource       = ep93xx_i2s_resource,
 800 };
 801
 802 static struct platform_device ep93xx_pcm_device = {
 803         .name           = "ep93xx-pcm-audio",
 804         .id             = -1,
 805 };
 806
 807 void __init ep93xx_register_i2s(void)
 808 {
 809         platform_device_register(&ep93xx_i2s_device);
 810         platform_device_register(&ep93xx_pcm_device);
 811 }
 812
 813 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 814                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 815
 816 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 817                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 818
 819 int ep93xx_i2s_acquire(unsigned i2s_pins, unsigned i2s_config)
 820 {
 821         unsigned val;
 822
 823         /* Sanity check */
 824         if (i2s_pins & ~EP93XX_SYSCON_DEVCFG_I2S_MASK)
 825                 return -EINVAL;
 826         if (i2s_config & ~EP93XX_I2SCLKDIV_MASK)
 827                 return -EINVAL;
 828
 829         /* Must have only one of I2SONSSP/I2SONAC97 set */
 830         if ((i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONSSP) ==
 831             (i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONAC97))
 832                 return -EINVAL;
 833
 834         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 835         ep93xx_devcfg_set_bits(i2s_pins);
 836
 837         /*
 838          * This is potentially racy with the clock api for i2s_mclk, sclk and
 839          * lrclk. Since the i2s driver is the only user of those clocks we
 840          * rely on it to prevent parallel use of this function and the
 841          * clock api for the i2s clocks.
 842          */
 843         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 844         val &= ~EP93XX_I2SCLKDIV_MASK;
 845         val |= i2s_config;
 846         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 847
 848         return 0;
 849 }
 850 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 851
 852 void ep93xx_i2s_release(void)
 853 {
 854         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 855 }
 856 EXPORT_SYMBOL(ep93xx_i2s_release);
 857
 858 /*************************************************************************
 859  * EP93xx AC97 audio peripheral handling
 860  *************************************************************************/
 861 static struct resource ep93xx_ac97_resources[] = {
 862         {
 863                 .start  = EP93XX_AAC_PHYS_BASE,
 864                 .end    = EP93XX_AAC_PHYS_BASE + 0xac - 1,
 865                 .flags  = IORESOURCE_MEM,
 866         },
 867         {
 868                 .start  = IRQ_EP93XX_AACINTR,
 869                 .end    = IRQ_EP93XX_AACINTR,
 870                 .flags  = IORESOURCE_IRQ,
 871         },
 872 };
 873
 874 static struct platform_device ep93xx_ac97_device = {
 875         .name           = "ep93xx-ac97",
 876         .id             = -1,
 877         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 878         .resource       = ep93xx_ac97_resources,
 879 };
 880
 881 void __init ep93xx_register_ac97(void)
 882 {
 883         /*
 884          * Make sure that the AC97 pins are not used by I2S.
 885          */
 886         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 887
 888         platform_device_register(&ep93xx_ac97_device);
 889         platform_device_register(&ep93xx_pcm_device);
 890 }
 891
 892 void __init ep93xx_init_devices(void)
 893 {
 894         /* Disallow access to MaverickCrunch initially */
 895         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 896
 897         /* Get the GPIO working early, other devices need it */
 898         platform_device_register(&ep93xx_gpio_device);
 899
 900         amba_device_register(&uart1_device, &iomem_resource);
 901         amba_device_register(&uart2_device, &iomem_resource);
 902         amba_device_register(&uart3_device, &iomem_resource);
 903
 904         platform_device_register(&ep93xx_rtc_device);
 905         platform_device_register(&ep93xx_ohci_device);
 906         platform_device_register(&ep93xx_leds);
 907 }