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 struct amba_device uart1_device = {
 283         .dev            = {
 284                 .init_name      = "apb:uart1",
 285                 .platform_data  = &ep93xx_uart_data,
 286         },
 287         .res            = {
 288                 .start  = EP93XX_UART1_PHYS_BASE,
 289                 .end    = EP93XX_UART1_PHYS_BASE + 0x0fff,
 290                 .flags  = IORESOURCE_MEM,
 291         },
 292         .irq            = { IRQ_EP93XX_UART1, NO_IRQ },
 293         .periphid       = 0x00041010,
 294 };
 295
 296 static struct amba_device uart2_device = {
 297         .dev            = {
 298                 .init_name      = "apb:uart2",
 299                 .platform_data  = &ep93xx_uart_data,
 300         },
 301         .res            = {
 302                 .start  = EP93XX_UART2_PHYS_BASE,
 303                 .end    = EP93XX_UART2_PHYS_BASE + 0x0fff,
 304                 .flags  = IORESOURCE_MEM,
 305         },
 306         .irq            = { IRQ_EP93XX_UART2, NO_IRQ },
 307         .periphid       = 0x00041010,
 308 };
 309
 310 static struct amba_device uart3_device = {
 311         .dev            = {
 312                 .init_name      = "apb:uart3",
 313                 .platform_data  = &ep93xx_uart_data,
 314         },
 315         .res            = {
 316                 .start  = EP93XX_UART3_PHYS_BASE,
 317                 .end    = EP93XX_UART3_PHYS_BASE + 0x0fff,
 318                 .flags  = IORESOURCE_MEM,
 319         },
 320         .irq            = { IRQ_EP93XX_UART3, NO_IRQ },
 321         .periphid       = 0x00041010,
 322 };
 323
 324
 325 static struct resource ep93xx_rtc_resource[] = {
 326         {
 327                 .start          = EP93XX_RTC_PHYS_BASE,
 328                 .end            = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
 329                 .flags          = IORESOURCE_MEM,
 330         },
 331 };
 332
 333 static struct platform_device ep93xx_rtc_device = {
 334         .name           = "ep93xx-rtc",
 335         .id             = -1,
 336         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 337         .resource       = ep93xx_rtc_resource,
 338 };
 339
 340
 341 static struct resource ep93xx_ohci_resources[] = {
 342         [0] = {
 343                 .start  = EP93XX_USB_PHYS_BASE,
 344                 .end    = EP93XX_USB_PHYS_BASE + 0x0fff,
 345                 .flags  = IORESOURCE_MEM,
 346         },
 347         [1] = {
 348                 .start  = IRQ_EP93XX_USB,
 349                 .end    = IRQ_EP93XX_USB,
 350                 .flags  = IORESOURCE_IRQ,
 351         },
 352 };
 353
 354
 355 static struct platform_device ep93xx_ohci_device = {
 356         .name           = "ep93xx-ohci",
 357         .id             = -1,
 358         .dev            = {
 359                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 360                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 361         },
 362         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 363         .resource       = ep93xx_ohci_resources,
 364 };
 365
 366
 367 /*************************************************************************
 368  * EP93xx physmap'ed flash
 369  *************************************************************************/
 370 static struct physmap_flash_data ep93xx_flash_data;
 371
 372 static struct resource ep93xx_flash_resource = {
 373         .flags          = IORESOURCE_MEM,
 374 };
 375
 376 static struct platform_device ep93xx_flash = {
 377         .name           = "physmap-flash",
 378         .id             = 0,
 379         .dev            = {
 380                 .platform_data  = &ep93xx_flash_data,
 381         },
 382         .num_resources  = 1,
 383         .resource       = &ep93xx_flash_resource,
 384 };
 385
 386 /**
 387  * ep93xx_register_flash() - Register the external flash device.
 388  * @width:      bank width in octets
 389  * @start:      resource start address
 390  * @size:       resource size
 391  */
 392 void __init ep93xx_register_flash(unsigned int width,
 393                                   resource_size_t start, resource_size_t size)
 394 {
 395         ep93xx_flash_data.width         = width;
 396
 397         ep93xx_flash_resource.start     = start;
 398         ep93xx_flash_resource.end       = start + size - 1;
 399
 400         platform_device_register(&ep93xx_flash);
 401 }
 402
 403
 404 /*************************************************************************
 405  * EP93xx ethernet peripheral handling
 406  *************************************************************************/
 407 static struct ep93xx_eth_data ep93xx_eth_data;
 408
 409 static struct resource ep93xx_eth_resource[] = {
 410         {
 411                 .start  = EP93XX_ETHERNET_PHYS_BASE,
 412                 .end    = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
 413                 .flags  = IORESOURCE_MEM,
 414         }, {
 415                 .start  = IRQ_EP93XX_ETHERNET,
 416                 .end    = IRQ_EP93XX_ETHERNET,
 417                 .flags  = IORESOURCE_IRQ,
 418         }
 419 };
 420
 421 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 422
 423 static struct platform_device ep93xx_eth_device = {
 424         .name           = "ep93xx-eth",
 425         .id             = -1,
 426         .dev            = {
 427                 .platform_data          = &ep93xx_eth_data,
 428                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 429                 .dma_mask               = &ep93xx_eth_dma_mask,
 430         },
 431         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 432         .resource       = ep93xx_eth_resource,
 433 };
 434
 435 /**
 436  * ep93xx_register_eth - Register the built-in ethernet platform device.
 437  * @data:       platform specific ethernet configuration (__initdata)
 438  * @copy_addr:  flag indicating that the MAC address should be copied
 439  *              from the IndAd registers (as programmed by the bootloader)
 440  */
 441 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 442 {
 443         if (copy_addr)
 444                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 445
 446         ep93xx_eth_data = *data;
 447         platform_device_register(&ep93xx_eth_device);
 448 }
 449
 450
 451 /*************************************************************************
 452  * EP93xx i2c peripheral handling
 453  *************************************************************************/
 454 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 455
 456 static struct platform_device ep93xx_i2c_device = {
 457         .name           = "i2c-gpio",
 458         .id             = 0,
 459         .dev            = {
 460                 .platform_data  = &ep93xx_i2c_data,
 461         },
 462 };
 463
 464 /**
 465  * ep93xx_register_i2c - Register the i2c platform device.
 466  * @data:       platform specific i2c-gpio configuration (__initdata)
 467  * @devices:    platform specific i2c bus device information (__initdata)
 468  * @num:        the number of devices on the i2c bus
 469  */
 470 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 471                                 struct i2c_board_info *devices, int num)
 472 {
 473         /*
 474          * Set the EEPROM interface pin drive type control.
 475          * Defines the driver type for the EECLK and EEDAT pins as either
 476          * open drain, which will require an external pull-up, or a normal
 477          * CMOS driver.
 478          */
 479         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 480                 pr_warning("sda != EEDAT, open drain has no effect\n");
 481         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 482                 pr_warning("scl != EECLK, open drain has no effect\n");
 483
 484         __raw_writel((data->sda_is_open_drain << 1) |
 485                      (data->scl_is_open_drain << 0),
 486                      EP93XX_GPIO_EEDRIVE);
 487
 488         ep93xx_i2c_data = *data;
 489         i2c_register_board_info(0, devices, num);
 490         platform_device_register(&ep93xx_i2c_device);
 491 }
 492
 493 /*************************************************************************
 494  * EP93xx SPI peripheral handling
 495  *************************************************************************/
 496 static struct ep93xx_spi_info ep93xx_spi_master_data;
 497
 498 static struct resource ep93xx_spi_resources[] = {
 499         {
 500                 .start  = EP93XX_SPI_PHYS_BASE,
 501                 .end    = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
 502                 .flags  = IORESOURCE_MEM,
 503         },
 504         {
 505                 .start  = IRQ_EP93XX_SSP,
 506                 .end    = IRQ_EP93XX_SSP,
 507                 .flags  = IORESOURCE_IRQ,
 508         },
 509 };
 510
 511 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 512
 513 static struct platform_device ep93xx_spi_device = {
 514         .name           = "ep93xx-spi",
 515         .id             = 0,
 516         .dev            = {
 517                 .platform_data          = &ep93xx_spi_master_data,
 518                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 519                 .dma_mask               = &ep93xx_spi_dma_mask,
 520         },
 521         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 522         .resource       = ep93xx_spi_resources,
 523 };
 524
 525 /**
 526  * ep93xx_register_spi() - registers spi platform device
 527  * @info: ep93xx board specific spi master info (__initdata)
 528  * @devices: SPI devices to register (__initdata)
 529  * @num: number of SPI devices to register
 530  *
 531  * This function registers platform device for the EP93xx SPI controller and
 532  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 533  */
 534 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 535                                 struct spi_board_info *devices, int num)
 536 {
 537         /*
 538          * When SPI is used, we need to make sure that I2S is muxed off from
 539          * SPI pins.
 540          */
 541         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 542
 543         ep93xx_spi_master_data = *info;
 544         spi_register_board_info(devices, num);
 545         platform_device_register(&ep93xx_spi_device);
 546 }
 547
 548 /*************************************************************************
 549  * EP93xx LEDs
 550  *************************************************************************/
 551 static struct gpio_led ep93xx_led_pins[] = {
 552         {
 553                 .name   = "platform:grled",
 554                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 555         }, {
 556                 .name   = "platform:rdled",
 557                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 558         },
 559 };
 560
 561 static struct gpio_led_platform_data ep93xx_led_data = {
 562         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 563         .leds           = ep93xx_led_pins,
 564 };
 565
 566 static struct platform_device ep93xx_leds = {
 567         .name           = "leds-gpio",
 568         .id             = -1,
 569         .dev            = {
 570                 .platform_data  = &ep93xx_led_data,
 571         },
 572 };
 573
 574
 575 /*************************************************************************
 576  * EP93xx pwm peripheral handling
 577  *************************************************************************/
 578 static struct resource ep93xx_pwm0_resource[] = {
 579         {
 580                 .start  = EP93XX_PWM_PHYS_BASE,
 581                 .end    = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
 582                 .flags  = IORESOURCE_MEM,
 583         },
 584 };
 585
 586 static struct platform_device ep93xx_pwm0_device = {
 587         .name           = "ep93xx-pwm",
 588         .id             = 0,
 589         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 590         .resource       = ep93xx_pwm0_resource,
 591 };
 592
 593 static struct resource ep93xx_pwm1_resource[] = {
 594         {
 595                 .start  = EP93XX_PWM_PHYS_BASE + 0x20,
 596                 .end    = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
 597                 .flags  = IORESOURCE_MEM,
 598         },
 599 };
 600
 601 static struct platform_device ep93xx_pwm1_device = {
 602         .name           = "ep93xx-pwm",
 603         .id             = 1,
 604         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 605         .resource       = ep93xx_pwm1_resource,
 606 };
 607
 608 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 609 {
 610         if (pwm0)
 611                 platform_device_register(&ep93xx_pwm0_device);
 612
 613         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 614         if (pwm1)
 615                 platform_device_register(&ep93xx_pwm1_device);
 616 }
 617
 618 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 619 {
 620         int err;
 621
 622         if (pdev->id == 0) {
 623                 err = 0;
 624         } else if (pdev->id == 1) {
 625                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 626                                    dev_name(&pdev->dev));
 627                 if (err)
 628                         return err;
 629                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 630                 if (err)
 631                         goto fail;
 632
 633                 /* PWM 1 output on EGPIO[14] */
 634                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 635         } else {
 636                 err = -ENODEV;
 637         }
 638
 639         return err;
 640
 641 fail:
 642         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 643         return err;
 644 }
 645 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 646
 647 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 648 {
 649         if (pdev->id == 1) {
 650                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 651                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 652
 653                 /* EGPIO[14] used for GPIO */
 654                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 655         }
 656 }
 657 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 658
 659
 660 /*************************************************************************
 661  * EP93xx video peripheral handling
 662  *************************************************************************/
 663 static struct ep93xxfb_mach_info ep93xxfb_data;
 664
 665 static struct resource ep93xx_fb_resource[] = {
 666         {
 667                 .start          = EP93XX_RASTER_PHYS_BASE,
 668                 .end            = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
 669                 .flags          = IORESOURCE_MEM,
 670         },
 671 };
 672
 673 static struct platform_device ep93xx_fb_device = {
 674         .name                   = "ep93xx-fb",
 675         .id                     = -1,
 676         .dev                    = {
 677                 .platform_data          = &ep93xxfb_data,
 678                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 679                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 680         },
 681         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 682         .resource               = ep93xx_fb_resource,
 683 };
 684
 685 /* The backlight use a single register in the framebuffer's register space */
 686 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 687
 688 static struct resource ep93xx_bl_resources[] = {
 689         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 690                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 691 };
 692
 693 static struct platform_device ep93xx_bl_device = {
 694         .name           = "ep93xx-bl",
 695         .id             = -1,
 696         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 697         .resource       = ep93xx_bl_resources,
 698 };
 699
 700 /**
 701  * ep93xx_register_fb - Register the framebuffer platform device.
 702  * @data:       platform specific framebuffer configuration (__initdata)
 703  */
 704 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 705 {
 706         ep93xxfb_data = *data;
 707         platform_device_register(&ep93xx_fb_device);
 708         platform_device_register(&ep93xx_bl_device);
 709 }
 710
 711
 712 /*************************************************************************
 713  * EP93xx matrix keypad peripheral handling
 714  *************************************************************************/
 715 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 716
 717 static struct resource ep93xx_keypad_resource[] = {
 718         {
 719                 .start  = EP93XX_KEY_MATRIX_PHYS_BASE,
 720                 .end    = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
 721                 .flags  = IORESOURCE_MEM,
 722         }, {
 723                 .start  = IRQ_EP93XX_KEY,
 724                 .end    = IRQ_EP93XX_KEY,
 725                 .flags  = IORESOURCE_IRQ,
 726         },
 727 };
 728
 729 static struct platform_device ep93xx_keypad_device = {
 730         .name           = "ep93xx-keypad",
 731         .id             = -1,
 732         .dev            = {
 733                 .platform_data  = &ep93xx_keypad_data,
 734         },
 735         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 736         .resource       = ep93xx_keypad_resource,
 737 };
 738
 739 /**
 740  * ep93xx_register_keypad - Register the keypad platform device.
 741  * @data:       platform specific keypad configuration (__initdata)
 742  */
 743 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 744 {
 745         ep93xx_keypad_data = *data;
 746         platform_device_register(&ep93xx_keypad_device);
 747 }
 748
 749 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 750 {
 751         int err;
 752         int i;
 753
 754         for (i = 0; i < 8; i++) {
 755                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 756                 if (err)
 757                         goto fail_gpio_c;
 758                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 759                 if (err)
 760                         goto fail_gpio_d;
 761         }
 762
 763         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 764         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 765                                  EP93XX_SYSCON_DEVCFG_GONK);
 766
 767         return 0;
 768
 769 fail_gpio_d:
 770         gpio_free(EP93XX_GPIO_LINE_C(i));
 771 fail_gpio_c:
 772         for ( ; i >= 0; --i) {
 773                 gpio_free(EP93XX_GPIO_LINE_C(i));
 774                 gpio_free(EP93XX_GPIO_LINE_D(i));
 775         }
 776         return err;
 777 }
 778 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 779
 780 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 781 {
 782         int i;
 783
 784         for (i = 0; i < 8; i++) {
 785                 gpio_free(EP93XX_GPIO_LINE_C(i));
 786                 gpio_free(EP93XX_GPIO_LINE_D(i));
 787         }
 788
 789         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 790         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 791                                EP93XX_SYSCON_DEVCFG_GONK);
 792 }
 793 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 794
 795 /*************************************************************************
 796  * EP93xx I2S audio peripheral handling
 797  *************************************************************************/
 798 static struct resource ep93xx_i2s_resource[] = {
 799         {
 800                 .start  = EP93XX_I2S_PHYS_BASE,
 801                 .end    = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
 802                 .flags  = IORESOURCE_MEM,
 803         },
 804 };
 805
 806 static struct platform_device ep93xx_i2s_device = {
 807         .name           = "ep93xx-i2s",
 808         .id             = -1,
 809         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 810         .resource       = ep93xx_i2s_resource,
 811 };
 812
 813 static struct platform_device ep93xx_pcm_device = {
 814         .name           = "ep93xx-pcm-audio",
 815         .id             = -1,
 816 };
 817
 818 void __init ep93xx_register_i2s(void)
 819 {
 820         platform_device_register(&ep93xx_i2s_device);
 821         platform_device_register(&ep93xx_pcm_device);
 822 }
 823
 824 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 825                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 826
 827 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 828                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 829
 830 int ep93xx_i2s_acquire(void)
 831 {
 832         unsigned val;
 833
 834         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 835                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 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 |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 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 }
 908
 909 void ep93xx_restart(char mode, const char *cmd)
 910 {
 911         /*
 912          * Set then clear the SWRST bit to initiate a software reset
 913          */
 914         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 915         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 916
 917         while (1)
 918                 ;
 919 }