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 #include <mach/gpio-ep93xx.h>
  43
  44 #include <asm/mach/map.h>
  45 #include <asm/mach/time.h>
  46
  47 #include <asm/hardware/vic.h>
  48
  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 void __init ep93xx_timer_init(void)
 143 {
 144         u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
 145                     EP93XX_TIMER123_CONTROL_CLKSEL;
 146
 147         /* Enable periodic HZ timer.  */
 148         __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
 149         __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
 150         __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
 151                         EP93XX_TIMER1_CONTROL);
 152
 153         /* Enable lost jiffy timer.  */
 154         __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
 155                         EP93XX_TIMER4_VALUE_HIGH);
 156
 157         setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
 158 }
 159
 160 static unsigned long ep93xx_gettimeoffset(void)
 161 {
 162         int offset;
 163
 164         offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
 165
 166         /* Calculate (1000000 / 983040) * offset.  */
 167         return offset + (53 * offset / 3072);
 168 }
 169
 170 struct sys_timer ep93xx_timer = {
 171         .init           = ep93xx_timer_init,
 172         .offset         = ep93xx_gettimeoffset,
 173 };
 174
 175
 176 /*************************************************************************
 177  * EP93xx IRQ handling
 178  *************************************************************************/
 179 void __init ep93xx_init_irq(void)
 180 {
 181         vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
 182         vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
 183 }
 184
 185
 186 /*************************************************************************
 187  * EP93xx System Controller Software Locked register handling
 188  *************************************************************************/
 189
 190 /*
 191  * syscon_swlock prevents anything else from writing to the syscon
 192  * block while a software locked register is being written.
 193  */
 194 static DEFINE_SPINLOCK(syscon_swlock);
 195
 196 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
 197 {
 198         unsigned long flags;
 199
 200         spin_lock_irqsave(&syscon_swlock, flags);
 201
 202         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 203         __raw_writel(val, reg);
 204
 205         spin_unlock_irqrestore(&syscon_swlock, flags);
 206 }
 207 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write);
 208
 209 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 210 {
 211         unsigned long flags;
 212         unsigned int val;
 213
 214         spin_lock_irqsave(&syscon_swlock, flags);
 215
 216         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 217         val &= ~clear_bits;
 218         val |= set_bits;
 219         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 220         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 221
 222         spin_unlock_irqrestore(&syscon_swlock, flags);
 223 }
 224 EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
 225
 226 /**
 227  * ep93xx_chip_revision() - returns the EP93xx chip revision
 228  *
 229  * See <mach/platform.h> for more information.
 230  */
 231 unsigned int ep93xx_chip_revision(void)
 232 {
 233         unsigned int v;
 234
 235         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 236         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 237         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 238         return v;
 239 }
 240
 241 /*************************************************************************
 242  * EP93xx GPIO
 243  *************************************************************************/
 244 static struct resource ep93xx_gpio_resource[] = {
 245         {
 246                 .start          = EP93XX_GPIO_PHYS_BASE,
 247                 .end            = EP93XX_GPIO_PHYS_BASE + 0xcc - 1,
 248                 .flags          = IORESOURCE_MEM,
 249         },
 250 };
 251
 252 static struct platform_device ep93xx_gpio_device = {
 253         .name           = "gpio-ep93xx",
 254         .id             = -1,
 255         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 256         .resource       = ep93xx_gpio_resource,
 257 };
 258
 259 /*************************************************************************
 260  * EP93xx peripheral handling
 261  *************************************************************************/
 262 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 263
 264 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 265                                   void __iomem *base, unsigned int mctrl)
 266 {
 267         unsigned int mcr;
 268
 269         mcr = 0;
 270         if (mctrl & TIOCM_RTS)
 271                 mcr |= 2;
 272         if (mctrl & TIOCM_DTR)
 273                 mcr |= 1;
 274
 275         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 276 }
 277
 278 static struct amba_pl010_data ep93xx_uart_data = {
 279         .set_mctrl      = ep93xx_uart_set_mctrl,
 280 };
 281
 282 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
 283         { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
 284
 285 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
 286         { IRQ_EP93XX_UART2 }, &ep93xx_uart_data);
 287
 288 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
 289         { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
 290
 291 static struct resource ep93xx_rtc_resource[] = {
 292         {
 293                 .start          = EP93XX_RTC_PHYS_BASE,
 294                 .end            = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
 295                 .flags          = IORESOURCE_MEM,
 296         },
 297 };
 298
 299 static struct platform_device ep93xx_rtc_device = {
 300         .name           = "ep93xx-rtc",
 301         .id             = -1,
 302         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 303         .resource       = ep93xx_rtc_resource,
 304 };
 305
 306
 307 static struct resource ep93xx_ohci_resources[] = {
 308         [0] = {
 309                 .start  = EP93XX_USB_PHYS_BASE,
 310                 .end    = EP93XX_USB_PHYS_BASE + 0x0fff,
 311                 .flags  = IORESOURCE_MEM,
 312         },
 313         [1] = {
 314                 .start  = IRQ_EP93XX_USB,
 315                 .end    = IRQ_EP93XX_USB,
 316                 .flags  = IORESOURCE_IRQ,
 317         },
 318 };
 319
 320
 321 static struct platform_device ep93xx_ohci_device = {
 322         .name           = "ep93xx-ohci",
 323         .id             = -1,
 324         .dev            = {
 325                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 326                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 327         },
 328         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 329         .resource       = ep93xx_ohci_resources,
 330 };
 331
 332
 333 /*************************************************************************
 334  * EP93xx physmap'ed flash
 335  *************************************************************************/
 336 static struct physmap_flash_data ep93xx_flash_data;
 337
 338 static struct resource ep93xx_flash_resource = {
 339         .flags          = IORESOURCE_MEM,
 340 };
 341
 342 static struct platform_device ep93xx_flash = {
 343         .name           = "physmap-flash",
 344         .id             = 0,
 345         .dev            = {
 346                 .platform_data  = &ep93xx_flash_data,
 347         },
 348         .num_resources  = 1,
 349         .resource       = &ep93xx_flash_resource,
 350 };
 351
 352 /**
 353  * ep93xx_register_flash() - Register the external flash device.
 354  * @width:      bank width in octets
 355  * @start:      resource start address
 356  * @size:       resource size
 357  */
 358 void __init ep93xx_register_flash(unsigned int width,
 359                                   resource_size_t start, resource_size_t size)
 360 {
 361         ep93xx_flash_data.width         = width;
 362
 363         ep93xx_flash_resource.start     = start;
 364         ep93xx_flash_resource.end       = start + size - 1;
 365
 366         platform_device_register(&ep93xx_flash);
 367 }
 368
 369
 370 /*************************************************************************
 371  * EP93xx ethernet peripheral handling
 372  *************************************************************************/
 373 static struct ep93xx_eth_data ep93xx_eth_data;
 374
 375 static struct resource ep93xx_eth_resource[] = {
 376         {
 377                 .start  = EP93XX_ETHERNET_PHYS_BASE,
 378                 .end    = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
 379                 .flags  = IORESOURCE_MEM,
 380         }, {
 381                 .start  = IRQ_EP93XX_ETHERNET,
 382                 .end    = IRQ_EP93XX_ETHERNET,
 383                 .flags  = IORESOURCE_IRQ,
 384         }
 385 };
 386
 387 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 388
 389 static struct platform_device ep93xx_eth_device = {
 390         .name           = "ep93xx-eth",
 391         .id             = -1,
 392         .dev            = {
 393                 .platform_data          = &ep93xx_eth_data,
 394                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 395                 .dma_mask               = &ep93xx_eth_dma_mask,
 396         },
 397         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 398         .resource       = ep93xx_eth_resource,
 399 };
 400
 401 /**
 402  * ep93xx_register_eth - Register the built-in ethernet platform device.
 403  * @data:       platform specific ethernet configuration (__initdata)
 404  * @copy_addr:  flag indicating that the MAC address should be copied
 405  *              from the IndAd registers (as programmed by the bootloader)
 406  */
 407 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 408 {
 409         if (copy_addr)
 410                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 411
 412         ep93xx_eth_data = *data;
 413         platform_device_register(&ep93xx_eth_device);
 414 }
 415
 416
 417 /*************************************************************************
 418  * EP93xx i2c peripheral handling
 419  *************************************************************************/
 420 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 421
 422 static struct platform_device ep93xx_i2c_device = {
 423         .name           = "i2c-gpio",
 424         .id             = 0,
 425         .dev            = {
 426                 .platform_data  = &ep93xx_i2c_data,
 427         },
 428 };
 429
 430 /**
 431  * ep93xx_register_i2c - Register the i2c platform device.
 432  * @data:       platform specific i2c-gpio configuration (__initdata)
 433  * @devices:    platform specific i2c bus device information (__initdata)
 434  * @num:        the number of devices on the i2c bus
 435  */
 436 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 437                                 struct i2c_board_info *devices, int num)
 438 {
 439         /*
 440          * Set the EEPROM interface pin drive type control.
 441          * Defines the driver type for the EECLK and EEDAT pins as either
 442          * open drain, which will require an external pull-up, or a normal
 443          * CMOS driver.
 444          */
 445         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 446                 pr_warning("sda != EEDAT, open drain has no effect\n");
 447         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 448                 pr_warning("scl != EECLK, open drain has no effect\n");
 449
 450         __raw_writel((data->sda_is_open_drain << 1) |
 451                      (data->scl_is_open_drain << 0),
 452                      EP93XX_GPIO_EEDRIVE);
 453
 454         ep93xx_i2c_data = *data;
 455         i2c_register_board_info(0, devices, num);
 456         platform_device_register(&ep93xx_i2c_device);
 457 }
 458
 459 /*************************************************************************
 460  * EP93xx SPI peripheral handling
 461  *************************************************************************/
 462 static struct ep93xx_spi_info ep93xx_spi_master_data;
 463
 464 static struct resource ep93xx_spi_resources[] = {
 465         {
 466                 .start  = EP93XX_SPI_PHYS_BASE,
 467                 .end    = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
 468                 .flags  = IORESOURCE_MEM,
 469         },
 470         {
 471                 .start  = IRQ_EP93XX_SSP,
 472                 .end    = IRQ_EP93XX_SSP,
 473                 .flags  = IORESOURCE_IRQ,
 474         },
 475 };
 476
 477 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 478
 479 static struct platform_device ep93xx_spi_device = {
 480         .name           = "ep93xx-spi",
 481         .id             = 0,
 482         .dev            = {
 483                 .platform_data          = &ep93xx_spi_master_data,
 484                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 485                 .dma_mask               = &ep93xx_spi_dma_mask,
 486         },
 487         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 488         .resource       = ep93xx_spi_resources,
 489 };
 490
 491 /**
 492  * ep93xx_register_spi() - registers spi platform device
 493  * @info: ep93xx board specific spi master info (__initdata)
 494  * @devices: SPI devices to register (__initdata)
 495  * @num: number of SPI devices to register
 496  *
 497  * This function registers platform device for the EP93xx SPI controller and
 498  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 499  */
 500 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 501                                 struct spi_board_info *devices, int num)
 502 {
 503         /*
 504          * When SPI is used, we need to make sure that I2S is muxed off from
 505          * SPI pins.
 506          */
 507         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 508
 509         ep93xx_spi_master_data = *info;
 510         spi_register_board_info(devices, num);
 511         platform_device_register(&ep93xx_spi_device);
 512 }
 513
 514 /*************************************************************************
 515  * EP93xx LEDs
 516  *************************************************************************/
 517 static struct gpio_led ep93xx_led_pins[] = {
 518         {
 519                 .name   = "platform:grled",
 520                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 521         }, {
 522                 .name   = "platform:rdled",
 523                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 524         },
 525 };
 526
 527 static struct gpio_led_platform_data ep93xx_led_data = {
 528         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 529         .leds           = ep93xx_led_pins,
 530 };
 531
 532 static struct platform_device ep93xx_leds = {
 533         .name           = "leds-gpio",
 534         .id             = -1,
 535         .dev            = {
 536                 .platform_data  = &ep93xx_led_data,
 537         },
 538 };
 539
 540
 541 /*************************************************************************
 542  * EP93xx pwm peripheral handling
 543  *************************************************************************/
 544 static struct resource ep93xx_pwm0_resource[] = {
 545         {
 546                 .start  = EP93XX_PWM_PHYS_BASE,
 547                 .end    = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
 548                 .flags  = IORESOURCE_MEM,
 549         },
 550 };
 551
 552 static struct platform_device ep93xx_pwm0_device = {
 553         .name           = "ep93xx-pwm",
 554         .id             = 0,
 555         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 556         .resource       = ep93xx_pwm0_resource,
 557 };
 558
 559 static struct resource ep93xx_pwm1_resource[] = {
 560         {
 561                 .start  = EP93XX_PWM_PHYS_BASE + 0x20,
 562                 .end    = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
 563                 .flags  = IORESOURCE_MEM,
 564         },
 565 };
 566
 567 static struct platform_device ep93xx_pwm1_device = {
 568         .name           = "ep93xx-pwm",
 569         .id             = 1,
 570         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 571         .resource       = ep93xx_pwm1_resource,
 572 };
 573
 574 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 575 {
 576         if (pwm0)
 577                 platform_device_register(&ep93xx_pwm0_device);
 578
 579         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 580         if (pwm1)
 581                 platform_device_register(&ep93xx_pwm1_device);
 582 }
 583
 584 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 585 {
 586         int err;
 587
 588         if (pdev->id == 0) {
 589                 err = 0;
 590         } else if (pdev->id == 1) {
 591                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 592                                    dev_name(&pdev->dev));
 593                 if (err)
 594                         return err;
 595                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 596                 if (err)
 597                         goto fail;
 598
 599                 /* PWM 1 output on EGPIO[14] */
 600                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 601         } else {
 602                 err = -ENODEV;
 603         }
 604
 605         return err;
 606
 607 fail:
 608         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 609         return err;
 610 }
 611 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 612
 613 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 614 {
 615         if (pdev->id == 1) {
 616                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 617                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 618
 619                 /* EGPIO[14] used for GPIO */
 620                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 621         }
 622 }
 623 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 624
 625
 626 /*************************************************************************
 627  * EP93xx video peripheral handling
 628  *************************************************************************/
 629 static struct ep93xxfb_mach_info ep93xxfb_data;
 630
 631 static struct resource ep93xx_fb_resource[] = {
 632         {
 633                 .start          = EP93XX_RASTER_PHYS_BASE,
 634                 .end            = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
 635                 .flags          = IORESOURCE_MEM,
 636         },
 637 };
 638
 639 static struct platform_device ep93xx_fb_device = {
 640         .name                   = "ep93xx-fb",
 641         .id                     = -1,
 642         .dev                    = {
 643                 .platform_data          = &ep93xxfb_data,
 644                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 645                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 646         },
 647         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 648         .resource               = ep93xx_fb_resource,
 649 };
 650
 651 static struct platform_device ep93xx_bl_device = {
 652         .name           = "ep93xx-bl",
 653         .id             = -1,
 654 };
 655
 656 /**
 657  * ep93xx_register_fb - Register the framebuffer platform device.
 658  * @data:       platform specific framebuffer configuration (__initdata)
 659  */
 660 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 661 {
 662         ep93xxfb_data = *data;
 663         platform_device_register(&ep93xx_fb_device);
 664         platform_device_register(&ep93xx_bl_device);
 665 }
 666
 667
 668 /*************************************************************************
 669  * EP93xx matrix keypad peripheral handling
 670  *************************************************************************/
 671 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 672
 673 static struct resource ep93xx_keypad_resource[] = {
 674         {
 675                 .start  = EP93XX_KEY_MATRIX_PHYS_BASE,
 676                 .end    = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
 677                 .flags  = IORESOURCE_MEM,
 678         }, {
 679                 .start  = IRQ_EP93XX_KEY,
 680                 .end    = IRQ_EP93XX_KEY,
 681                 .flags  = IORESOURCE_IRQ,
 682         },
 683 };
 684
 685 static struct platform_device ep93xx_keypad_device = {
 686         .name           = "ep93xx-keypad",
 687         .id             = -1,
 688         .dev            = {
 689                 .platform_data  = &ep93xx_keypad_data,
 690         },
 691         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 692         .resource       = ep93xx_keypad_resource,
 693 };
 694
 695 /**
 696  * ep93xx_register_keypad - Register the keypad platform device.
 697  * @data:       platform specific keypad configuration (__initdata)
 698  */
 699 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 700 {
 701         ep93xx_keypad_data = *data;
 702         platform_device_register(&ep93xx_keypad_device);
 703 }
 704
 705 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 706 {
 707         int err;
 708         int i;
 709
 710         for (i = 0; i < 8; i++) {
 711                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 712                 if (err)
 713                         goto fail_gpio_c;
 714                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 715                 if (err)
 716                         goto fail_gpio_d;
 717         }
 718
 719         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 720         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 721                                  EP93XX_SYSCON_DEVCFG_GONK);
 722
 723         return 0;
 724
 725 fail_gpio_d:
 726         gpio_free(EP93XX_GPIO_LINE_C(i));
 727 fail_gpio_c:
 728         for ( ; i >= 0; --i) {
 729                 gpio_free(EP93XX_GPIO_LINE_C(i));
 730                 gpio_free(EP93XX_GPIO_LINE_D(i));
 731         }
 732         return err;
 733 }
 734 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 735
 736 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 737 {
 738         int i;
 739
 740         for (i = 0; i < 8; i++) {
 741                 gpio_free(EP93XX_GPIO_LINE_C(i));
 742                 gpio_free(EP93XX_GPIO_LINE_D(i));
 743         }
 744
 745         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 746         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 747                                EP93XX_SYSCON_DEVCFG_GONK);
 748 }
 749 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 750
 751 /*************************************************************************
 752  * EP93xx I2S audio peripheral handling
 753  *************************************************************************/
 754 static struct resource ep93xx_i2s_resource[] = {
 755         {
 756                 .start  = EP93XX_I2S_PHYS_BASE,
 757                 .end    = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
 758                 .flags  = IORESOURCE_MEM,
 759         },
 760 };
 761
 762 static struct platform_device ep93xx_i2s_device = {
 763         .name           = "ep93xx-i2s",
 764         .id             = -1,
 765         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 766         .resource       = ep93xx_i2s_resource,
 767 };
 768
 769 static struct platform_device ep93xx_pcm_device = {
 770         .name           = "ep93xx-pcm-audio",
 771         .id             = -1,
 772 };
 773
 774 void __init ep93xx_register_i2s(void)
 775 {
 776         platform_device_register(&ep93xx_i2s_device);
 777         platform_device_register(&ep93xx_pcm_device);
 778 }
 779
 780 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 781                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 782
 783 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 784                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 785
 786 int ep93xx_i2s_acquire(void)
 787 {
 788         unsigned val;
 789
 790         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 791                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 792
 793         /*
 794          * This is potentially racy with the clock api for i2s_mclk, sclk and
 795          * lrclk. Since the i2s driver is the only user of those clocks we
 796          * rely on it to prevent parallel use of this function and the
 797          * clock api for the i2s clocks.
 798          */
 799         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 800         val &= ~EP93XX_I2SCLKDIV_MASK;
 801         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 802         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 803
 804         return 0;
 805 }
 806 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 807
 808 void ep93xx_i2s_release(void)
 809 {
 810         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 811 }
 812 EXPORT_SYMBOL(ep93xx_i2s_release);
 813
 814 /*************************************************************************
 815  * EP93xx AC97 audio peripheral handling
 816  *************************************************************************/
 817 static struct resource ep93xx_ac97_resources[] = {
 818         {
 819                 .start  = EP93XX_AAC_PHYS_BASE,
 820                 .end    = EP93XX_AAC_PHYS_BASE + 0xac - 1,
 821                 .flags  = IORESOURCE_MEM,
 822         },
 823         {
 824                 .start  = IRQ_EP93XX_AACINTR,
 825                 .end    = IRQ_EP93XX_AACINTR,
 826                 .flags  = IORESOURCE_IRQ,
 827         },
 828 };
 829
 830 static struct platform_device ep93xx_ac97_device = {
 831         .name           = "ep93xx-ac97",
 832         .id             = -1,
 833         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 834         .resource       = ep93xx_ac97_resources,
 835 };
 836
 837 void __init ep93xx_register_ac97(void)
 838 {
 839         /*
 840          * Make sure that the AC97 pins are not used by I2S.
 841          */
 842         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 843
 844         platform_device_register(&ep93xx_ac97_device);
 845         platform_device_register(&ep93xx_pcm_device);
 846 }
 847
 848 void __init ep93xx_init_devices(void)
 849 {
 850         /* Disallow access to MaverickCrunch initially */
 851         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 852
 853         /* Get the GPIO working early, other devices need it */
 854         platform_device_register(&ep93xx_gpio_device);
 855
 856         amba_device_register(&uart1_device, &iomem_resource);
 857         amba_device_register(&uart2_device, &iomem_resource);
 858         amba_device_register(&uart3_device, &iomem_resource);
 859
 860         platform_device_register(&ep93xx_rtc_device);
 861         platform_device_register(&ep93xx_ohci_device);
 862         platform_device_register(&ep93xx_leds);
 863 }
 864
 865 void ep93xx_restart(char mode, const char *cmd)
 866 {
 867         /*
 868          * Set then clear the SWRST bit to initiate a software reset
 869          */
 870         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 871         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 872
 873         while (1)
 874                 ;
 875 }