arch/arm/mach-ep93xx/core.c

   1 /*
   2  * arch/arm/mach-ep93xx/core.c
   3  * Core routines for Cirrus EP93xx chips.
   4  *
   5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6  * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
   7  *
   8  * Thanks go to Michael Burian and Ray Lehtiniemi for their key
   9  * role in the ep93xx linux community.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  */
  16
  17 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/timex.h>
  25 #include <linux/irq.h>
  26 #include <linux/io.h>
  27 #include <linux/gpio.h>
  28 #include <linux/leds.h>
  29 #include <linux/termios.h>
  30 #include <linux/amba/bus.h>
  31 #include <linux/amba/serial.h>
  32 #include <linux/mtd/physmap.h>
  33 #include <linux/i2c.h>
  34 #include <linux/i2c-gpio.h>
  35 #include <linux/spi/spi.h>
  36
  37 #include <mach/hardware.h>
  38 #include <mach/fb.h>
  39 #include <mach/ep93xx_keypad.h>
  40 #include <mach/ep93xx_spi.h>
  41
  42 #include <asm/mach/map.h>
  43 #include <asm/mach/time.h>
  44
  45 #include <asm/hardware/vic.h>
  46
  47
  48 /*************************************************************************
  49  * Static I/O mappings that are needed for all EP93xx platforms
  50  *************************************************************************/
  51 static struct map_desc ep93xx_io_desc[] __initdata = {
  52         {
  53                 .virtual        = EP93XX_AHB_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  55                 .length         = EP93XX_AHB_SIZE,
  56                 .type           = MT_DEVICE,
  57         }, {
  58                 .virtual        = EP93XX_APB_VIRT_BASE,
  59                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  60                 .length         = EP93XX_APB_SIZE,
  61                 .type           = MT_DEVICE,
  62         },
  63 };
  64
  65 void __init ep93xx_map_io(void)
  66 {
  67         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  68 }
  69
  70
  71 /*************************************************************************
  72  * Timer handling for EP93xx
  73  *************************************************************************
  74  * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
  75  * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
  76  * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
  77  * is free-running, and can't generate interrupts.
  78  *
  79  * The 508 kHz timers are ideal for use for the timer interrupt, as the
  80  * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
  81  * bit timers (timer 1) since we don't need more than 16 bits of reload
  82  * value as long as HZ >= 8.
  83  *
  84  * The higher clock rate of timer 4 makes it a better choice than the
  85  * other timers for use in gettimeoffset(), while the fact that it can't
  86  * generate interrupts means we don't have to worry about not being able
  87  * to use this timer for something else.  We also use timer 4 for keeping
  88  * track of lost jiffies.
  89  */
  90 #define EP93XX_TIMER_REG(x)             (EP93XX_TIMER_BASE + (x))
  91 #define EP93XX_TIMER1_LOAD              EP93XX_TIMER_REG(0x00)
  92 #define EP93XX_TIMER1_VALUE             EP93XX_TIMER_REG(0x04)
  93 #define EP93XX_TIMER1_CONTROL           EP93XX_TIMER_REG(0x08)
  94 #define EP93XX_TIMER123_CONTROL_ENABLE  (1 << 7)
  95 #define EP93XX_TIMER123_CONTROL_MODE    (1 << 6)
  96 #define EP93XX_TIMER123_CONTROL_CLKSEL  (1 << 3)
  97 #define EP93XX_TIMER1_CLEAR             EP93XX_TIMER_REG(0x0c)
  98 #define EP93XX_TIMER2_LOAD              EP93XX_TIMER_REG(0x20)
  99 #define EP93XX_TIMER2_VALUE             EP93XX_TIMER_REG(0x24)
 100 #define EP93XX_TIMER2_CONTROL           EP93XX_TIMER_REG(0x28)
 101 #define EP93XX_TIMER2_CLEAR             EP93XX_TIMER_REG(0x2c)
 102 #define EP93XX_TIMER4_VALUE_LOW         EP93XX_TIMER_REG(0x60)
 103 #define EP93XX_TIMER4_VALUE_HIGH        EP93XX_TIMER_REG(0x64)
 104 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
 105 #define EP93XX_TIMER3_LOAD              EP93XX_TIMER_REG(0x80)
 106 #define EP93XX_TIMER3_VALUE             EP93XX_TIMER_REG(0x84)
 107 #define EP93XX_TIMER3_CONTROL           EP93XX_TIMER_REG(0x88)
 108 #define EP93XX_TIMER3_CLEAR             EP93XX_TIMER_REG(0x8c)
 109
 110 #define EP93XX_TIMER123_CLOCK           508469
 111 #define EP93XX_TIMER4_CLOCK             983040
 112
 113 #define TIMER1_RELOAD                   ((EP93XX_TIMER123_CLOCK / HZ) - 1)
 114 #define TIMER4_TICKS_PER_JIFFY          DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 115
 116 static unsigned int last_jiffy_time;
 117
 118 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 119 {
 120         /* Writing any value clears the timer interrupt */
 121         __raw_writel(1, EP93XX_TIMER1_CLEAR);
 122
 123         /* Recover lost jiffies */
 124         while ((signed long)
 125                 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
 126                                                 >= TIMER4_TICKS_PER_JIFFY) {
 127                 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
 128                 timer_tick();
 129         }
 130
 131         return IRQ_HANDLED;
 132 }
 133
 134 static struct irqaction ep93xx_timer_irq = {
 135         .name           = "ep93xx timer",
 136         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 137         .handler        = ep93xx_timer_interrupt,
 138 };
 139
 140 static void __init ep93xx_timer_init(void)
 141 {
 142         u32 tmode = EP93XX_TIMER123_CONTROL_MODE |
 143                     EP93XX_TIMER123_CONTROL_CLKSEL;
 144
 145         /* Enable periodic HZ timer.  */
 146         __raw_writel(tmode, EP93XX_TIMER1_CONTROL);
 147         __raw_writel(TIMER1_RELOAD, EP93XX_TIMER1_LOAD);
 148         __raw_writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE,
 149                         EP93XX_TIMER1_CONTROL);
 150
 151         /* Enable lost jiffy timer.  */
 152         __raw_writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE,
 153                         EP93XX_TIMER4_VALUE_HIGH);
 154
 155         setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
 156 }
 157
 158 static unsigned long ep93xx_gettimeoffset(void)
 159 {
 160         int offset;
 161
 162         offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
 163
 164         /* Calculate (1000000 / 983040) * offset.  */
 165         return offset + (53 * offset / 3072);
 166 }
 167
 168 struct sys_timer ep93xx_timer = {
 169         .init           = ep93xx_timer_init,
 170         .offset         = ep93xx_gettimeoffset,
 171 };
 172
 173
 174 /*************************************************************************
 175  * EP93xx IRQ handling
 176  *************************************************************************/
 177 extern void ep93xx_gpio_init_irq(void);
 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         ep93xx_gpio_init_irq();
 185 }
 186
 187
 188 /*************************************************************************
 189  * EP93xx System Controller Software Locked register handling
 190  *************************************************************************/
 191
 192 /*
 193  * syscon_swlock prevents anything else from writing to the syscon
 194  * block while a software locked register is being written.
 195  */
 196 static DEFINE_SPINLOCK(syscon_swlock);
 197
 198 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
 199 {
 200         unsigned long flags;
 201
 202         spin_lock_irqsave(&syscon_swlock, flags);
 203
 204         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 205         __raw_writel(val, reg);
 206
 207         spin_unlock_irqrestore(&syscon_swlock, flags);
 208 }
 209 EXPORT_SYMBOL(ep93xx_syscon_swlocked_write);
 210
 211 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 212 {
 213         unsigned long flags;
 214         unsigned int val;
 215
 216         spin_lock_irqsave(&syscon_swlock, flags);
 217
 218         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 219         val &= ~clear_bits;
 220         val |= set_bits;
 221         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 222         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 223
 224         spin_unlock_irqrestore(&syscon_swlock, flags);
 225 }
 226 EXPORT_SYMBOL(ep93xx_devcfg_set_clear);
 227
 228 /**
 229  * ep93xx_chip_revision() - returns the EP93xx chip revision
 230  *
 231  * See <mach/platform.h> for more information.
 232  */
 233 unsigned int ep93xx_chip_revision(void)
 234 {
 235         unsigned int v;
 236
 237         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 238         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 239         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 240         return v;
 241 }
 242
 243 /*************************************************************************
 244  * EP93xx peripheral handling
 245  *************************************************************************/
 246 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 247
 248 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 249                                   void __iomem *base, unsigned int mctrl)
 250 {
 251         unsigned int mcr;
 252
 253         mcr = 0;
 254         if (!(mctrl & TIOCM_RTS))
 255                 mcr |= 2;
 256         if (!(mctrl & TIOCM_DTR))
 257                 mcr |= 1;
 258
 259         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 260 }
 261
 262 static struct amba_pl010_data ep93xx_uart_data = {
 263         .set_mctrl      = ep93xx_uart_set_mctrl,
 264 };
 265
 266 static struct amba_device uart1_device = {
 267         .dev            = {
 268                 .init_name      = "apb:uart1",
 269                 .platform_data  = &ep93xx_uart_data,
 270         },
 271         .res            = {
 272                 .start  = EP93XX_UART1_PHYS_BASE,
 273                 .end    = EP93XX_UART1_PHYS_BASE + 0x0fff,
 274                 .flags  = IORESOURCE_MEM,
 275         },
 276         .irq            = { IRQ_EP93XX_UART1, NO_IRQ },
 277         .periphid       = 0x00041010,
 278 };
 279
 280 static struct amba_device uart2_device = {
 281         .dev            = {
 282                 .init_name      = "apb:uart2",
 283                 .platform_data  = &ep93xx_uart_data,
 284         },
 285         .res            = {
 286                 .start  = EP93XX_UART2_PHYS_BASE,
 287                 .end    = EP93XX_UART2_PHYS_BASE + 0x0fff,
 288                 .flags  = IORESOURCE_MEM,
 289         },
 290         .irq            = { IRQ_EP93XX_UART2, NO_IRQ },
 291         .periphid       = 0x00041010,
 292 };
 293
 294 static struct amba_device uart3_device = {
 295         .dev            = {
 296                 .init_name      = "apb:uart3",
 297                 .platform_data  = &ep93xx_uart_data,
 298         },
 299         .res            = {
 300                 .start  = EP93XX_UART3_PHYS_BASE,
 301                 .end    = EP93XX_UART3_PHYS_BASE + 0x0fff,
 302                 .flags  = IORESOURCE_MEM,
 303         },
 304         .irq            = { IRQ_EP93XX_UART3, NO_IRQ },
 305         .periphid       = 0x00041010,
 306 };
 307
 308
 309 static struct resource ep93xx_rtc_resource[] = {
 310         {
 311                 .start          = EP93XX_RTC_PHYS_BASE,
 312                 .end            = EP93XX_RTC_PHYS_BASE + 0x10c - 1,
 313                 .flags          = IORESOURCE_MEM,
 314         },
 315 };
 316
 317 static struct platform_device ep93xx_rtc_device = {
 318         .name           = "ep93xx-rtc",
 319         .id             = -1,
 320         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 321         .resource       = ep93xx_rtc_resource,
 322 };
 323
 324
 325 static struct resource ep93xx_ohci_resources[] = {
 326         [0] = {
 327                 .start  = EP93XX_USB_PHYS_BASE,
 328                 .end    = EP93XX_USB_PHYS_BASE + 0x0fff,
 329                 .flags  = IORESOURCE_MEM,
 330         },
 331         [1] = {
 332                 .start  = IRQ_EP93XX_USB,
 333                 .end    = IRQ_EP93XX_USB,
 334                 .flags  = IORESOURCE_IRQ,
 335         },
 336 };
 337
 338
 339 static struct platform_device ep93xx_ohci_device = {
 340         .name           = "ep93xx-ohci",
 341         .id             = -1,
 342         .dev            = {
 343                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 344                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 345         },
 346         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 347         .resource       = ep93xx_ohci_resources,
 348 };
 349
 350
 351 /*************************************************************************
 352  * EP93xx physmap'ed flash
 353  *************************************************************************/
 354 static struct physmap_flash_data ep93xx_flash_data;
 355
 356 static struct resource ep93xx_flash_resource = {
 357         .flags          = IORESOURCE_MEM,
 358 };
 359
 360 static struct platform_device ep93xx_flash = {
 361         .name           = "physmap-flash",
 362         .id             = 0,
 363         .dev            = {
 364                 .platform_data  = &ep93xx_flash_data,
 365         },
 366         .num_resources  = 1,
 367         .resource       = &ep93xx_flash_resource,
 368 };
 369
 370 /**
 371  * ep93xx_register_flash() - Register the external flash device.
 372  * @width:      bank width in octets
 373  * @start:      resource start address
 374  * @size:       resource size
 375  */
 376 void __init ep93xx_register_flash(unsigned int width,
 377                                   resource_size_t start, resource_size_t size)
 378 {
 379         ep93xx_flash_data.width         = width;
 380
 381         ep93xx_flash_resource.start     = start;
 382         ep93xx_flash_resource.end       = start + size - 1;
 383
 384         platform_device_register(&ep93xx_flash);
 385 }
 386
 387
 388 /*************************************************************************
 389  * EP93xx ethernet peripheral handling
 390  *************************************************************************/
 391 static struct ep93xx_eth_data ep93xx_eth_data;
 392
 393 static struct resource ep93xx_eth_resource[] = {
 394         {
 395                 .start  = EP93XX_ETHERNET_PHYS_BASE,
 396                 .end    = EP93XX_ETHERNET_PHYS_BASE + 0xffff,
 397                 .flags  = IORESOURCE_MEM,
 398         }, {
 399                 .start  = IRQ_EP93XX_ETHERNET,
 400                 .end    = IRQ_EP93XX_ETHERNET,
 401                 .flags  = IORESOURCE_IRQ,
 402         }
 403 };
 404
 405 static struct platform_device ep93xx_eth_device = {
 406         .name           = "ep93xx-eth",
 407         .id             = -1,
 408         .dev            = {
 409                 .platform_data  = &ep93xx_eth_data,
 410         },
 411         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 412         .resource       = ep93xx_eth_resource,
 413 };
 414
 415 /**
 416  * ep93xx_register_eth - Register the built-in ethernet platform device.
 417  * @data:       platform specific ethernet configuration (__initdata)
 418  * @copy_addr:  flag indicating that the MAC address should be copied
 419  *              from the IndAd registers (as programmed by the bootloader)
 420  */
 421 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 422 {
 423         if (copy_addr)
 424                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 425
 426         ep93xx_eth_data = *data;
 427         platform_device_register(&ep93xx_eth_device);
 428 }
 429
 430
 431 /*************************************************************************
 432  * EP93xx i2c peripheral handling
 433  *************************************************************************/
 434 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 435
 436 static struct platform_device ep93xx_i2c_device = {
 437         .name           = "i2c-gpio",
 438         .id             = 0,
 439         .dev            = {
 440                 .platform_data  = &ep93xx_i2c_data,
 441         },
 442 };
 443
 444 /**
 445  * ep93xx_register_i2c - Register the i2c platform device.
 446  * @data:       platform specific i2c-gpio configuration (__initdata)
 447  * @devices:    platform specific i2c bus device information (__initdata)
 448  * @num:        the number of devices on the i2c bus
 449  */
 450 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 451                                 struct i2c_board_info *devices, int num)
 452 {
 453         /*
 454          * Set the EEPROM interface pin drive type control.
 455          * Defines the driver type for the EECLK and EEDAT pins as either
 456          * open drain, which will require an external pull-up, or a normal
 457          * CMOS driver.
 458          */
 459         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 460                 pr_warning("sda != EEDAT, open drain has no effect\n");
 461         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 462                 pr_warning("scl != EECLK, open drain has no effect\n");
 463
 464         __raw_writel((data->sda_is_open_drain << 1) |
 465                      (data->scl_is_open_drain << 0),
 466                      EP93XX_GPIO_EEDRIVE);
 467
 468         ep93xx_i2c_data = *data;
 469         i2c_register_board_info(0, devices, num);
 470         platform_device_register(&ep93xx_i2c_device);
 471 }
 472
 473 /*************************************************************************
 474  * EP93xx SPI peripheral handling
 475  *************************************************************************/
 476 static struct ep93xx_spi_info ep93xx_spi_master_data;
 477
 478 static struct resource ep93xx_spi_resources[] = {
 479         {
 480                 .start  = EP93XX_SPI_PHYS_BASE,
 481                 .end    = EP93XX_SPI_PHYS_BASE + 0x18 - 1,
 482                 .flags  = IORESOURCE_MEM,
 483         },
 484         {
 485                 .start  = IRQ_EP93XX_SSP,
 486                 .end    = IRQ_EP93XX_SSP,
 487                 .flags  = IORESOURCE_IRQ,
 488         },
 489 };
 490
 491 static struct platform_device ep93xx_spi_device = {
 492         .name           = "ep93xx-spi",
 493         .id             = 0,
 494         .dev            = {
 495                 .platform_data = &ep93xx_spi_master_data,
 496         },
 497         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 498         .resource       = ep93xx_spi_resources,
 499 };
 500
 501 /**
 502  * ep93xx_register_spi() - registers spi platform device
 503  * @info: ep93xx board specific spi master info (__initdata)
 504  * @devices: SPI devices to register (__initdata)
 505  * @num: number of SPI devices to register
 506  *
 507  * This function registers platform device for the EP93xx SPI controller and
 508  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 509  */
 510 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 511                                 struct spi_board_info *devices, int num)
 512 {
 513         /*
 514          * When SPI is used, we need to make sure that I2S is muxed off from
 515          * SPI pins.
 516          */
 517         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 518
 519         ep93xx_spi_master_data = *info;
 520         spi_register_board_info(devices, num);
 521         platform_device_register(&ep93xx_spi_device);
 522 }
 523
 524 /*************************************************************************
 525  * EP93xx LEDs
 526  *************************************************************************/
 527 static struct gpio_led ep93xx_led_pins[] = {
 528         {
 529                 .name   = "platform:grled",
 530                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 531         }, {
 532                 .name   = "platform:rdled",
 533                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 534         },
 535 };
 536
 537 static struct gpio_led_platform_data ep93xx_led_data = {
 538         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 539         .leds           = ep93xx_led_pins,
 540 };
 541
 542 static struct platform_device ep93xx_leds = {
 543         .name           = "leds-gpio",
 544         .id             = -1,
 545         .dev            = {
 546                 .platform_data  = &ep93xx_led_data,
 547         },
 548 };
 549
 550
 551 /*************************************************************************
 552  * EP93xx pwm peripheral handling
 553  *************************************************************************/
 554 static struct resource ep93xx_pwm0_resource[] = {
 555         {
 556                 .start  = EP93XX_PWM_PHYS_BASE,
 557                 .end    = EP93XX_PWM_PHYS_BASE + 0x10 - 1,
 558                 .flags  = IORESOURCE_MEM,
 559         },
 560 };
 561
 562 static struct platform_device ep93xx_pwm0_device = {
 563         .name           = "ep93xx-pwm",
 564         .id             = 0,
 565         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 566         .resource       = ep93xx_pwm0_resource,
 567 };
 568
 569 static struct resource ep93xx_pwm1_resource[] = {
 570         {
 571                 .start  = EP93XX_PWM_PHYS_BASE + 0x20,
 572                 .end    = EP93XX_PWM_PHYS_BASE + 0x30 - 1,
 573                 .flags  = IORESOURCE_MEM,
 574         },
 575 };
 576
 577 static struct platform_device ep93xx_pwm1_device = {
 578         .name           = "ep93xx-pwm",
 579         .id             = 1,
 580         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 581         .resource       = ep93xx_pwm1_resource,
 582 };
 583
 584 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 585 {
 586         if (pwm0)
 587                 platform_device_register(&ep93xx_pwm0_device);
 588
 589         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 590         if (pwm1)
 591                 platform_device_register(&ep93xx_pwm1_device);
 592 }
 593
 594 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 595 {
 596         int err;
 597
 598         if (pdev->id == 0) {
 599                 err = 0;
 600         } else if (pdev->id == 1) {
 601                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 602                                    dev_name(&pdev->dev));
 603                 if (err)
 604                         return err;
 605                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 606                 if (err)
 607                         goto fail;
 608
 609                 /* PWM 1 output on EGPIO[14] */
 610                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 611         } else {
 612                 err = -ENODEV;
 613         }
 614
 615         return err;
 616
 617 fail:
 618         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 619         return err;
 620 }
 621 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 622
 623 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 624 {
 625         if (pdev->id == 1) {
 626                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 627                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 628
 629                 /* EGPIO[14] used for GPIO */
 630                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 631         }
 632 }
 633 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 634
 635
 636 /*************************************************************************
 637  * EP93xx video peripheral handling
 638  *************************************************************************/
 639 static struct ep93xxfb_mach_info ep93xxfb_data;
 640
 641 static struct resource ep93xx_fb_resource[] = {
 642         {
 643                 .start          = EP93XX_RASTER_PHYS_BASE,
 644                 .end            = EP93XX_RASTER_PHYS_BASE + 0x800 - 1,
 645                 .flags          = IORESOURCE_MEM,
 646         },
 647 };
 648
 649 static struct platform_device ep93xx_fb_device = {
 650         .name                   = "ep93xx-fb",
 651         .id                     = -1,
 652         .dev                    = {
 653                 .platform_data          = &ep93xxfb_data,
 654                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 655                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 656         },
 657         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 658         .resource               = ep93xx_fb_resource,
 659 };
 660
 661 static struct platform_device ep93xx_bl_device = {
 662         .name           = "ep93xx-bl",
 663         .id             = -1,
 664 };
 665
 666 /**
 667  * ep93xx_register_fb - Register the framebuffer platform device.
 668  * @data:       platform specific framebuffer configuration (__initdata)
 669  */
 670 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 671 {
 672         ep93xxfb_data = *data;
 673         platform_device_register(&ep93xx_fb_device);
 674         platform_device_register(&ep93xx_bl_device);
 675 }
 676
 677
 678 /*************************************************************************
 679  * EP93xx matrix keypad peripheral handling
 680  *************************************************************************/
 681 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 682
 683 static struct resource ep93xx_keypad_resource[] = {
 684         {
 685                 .start  = EP93XX_KEY_MATRIX_PHYS_BASE,
 686                 .end    = EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
 687                 .flags  = IORESOURCE_MEM,
 688         }, {
 689                 .start  = IRQ_EP93XX_KEY,
 690                 .end    = IRQ_EP93XX_KEY,
 691                 .flags  = IORESOURCE_IRQ,
 692         },
 693 };
 694
 695 static struct platform_device ep93xx_keypad_device = {
 696         .name           = "ep93xx-keypad",
 697         .id             = -1,
 698         .dev            = {
 699                 .platform_data  = &ep93xx_keypad_data,
 700         },
 701         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 702         .resource       = ep93xx_keypad_resource,
 703 };
 704
 705 /**
 706  * ep93xx_register_keypad - Register the keypad platform device.
 707  * @data:       platform specific keypad configuration (__initdata)
 708  */
 709 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 710 {
 711         ep93xx_keypad_data = *data;
 712         platform_device_register(&ep93xx_keypad_device);
 713 }
 714
 715 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 716 {
 717         int err;
 718         int i;
 719
 720         for (i = 0; i < 8; i++) {
 721                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 722                 if (err)
 723                         goto fail_gpio_c;
 724                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 725                 if (err)
 726                         goto fail_gpio_d;
 727         }
 728
 729         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 730         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 731                                  EP93XX_SYSCON_DEVCFG_GONK);
 732
 733         return 0;
 734
 735 fail_gpio_d:
 736         gpio_free(EP93XX_GPIO_LINE_C(i));
 737 fail_gpio_c:
 738         for ( ; i >= 0; --i) {
 739                 gpio_free(EP93XX_GPIO_LINE_C(i));
 740                 gpio_free(EP93XX_GPIO_LINE_D(i));
 741         }
 742         return err;
 743 }
 744 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 745
 746 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 747 {
 748         int i;
 749
 750         for (i = 0; i < 8; i++) {
 751                 gpio_free(EP93XX_GPIO_LINE_C(i));
 752                 gpio_free(EP93XX_GPIO_LINE_D(i));
 753         }
 754
 755         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 756         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 757                                EP93XX_SYSCON_DEVCFG_GONK);
 758 }
 759 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 760
 761 /*************************************************************************
 762  * EP93xx I2S audio peripheral handling
 763  *************************************************************************/
 764 static struct resource ep93xx_i2s_resource[] = {
 765         {
 766                 .start  = EP93XX_I2S_PHYS_BASE,
 767                 .end    = EP93XX_I2S_PHYS_BASE + 0x100 - 1,
 768                 .flags  = IORESOURCE_MEM,
 769         },
 770 };
 771
 772 static struct platform_device ep93xx_i2s_device = {
 773         .name           = "ep93xx-i2s",
 774         .id             = -1,
 775         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 776         .resource       = ep93xx_i2s_resource,
 777 };
 778
 779 static struct platform_device ep93xx_pcm_device = {
 780         .name           = "ep93xx-pcm-audio",
 781         .id             = -1,
 782 };
 783
 784 void __init ep93xx_register_i2s(void)
 785 {
 786         platform_device_register(&ep93xx_i2s_device);
 787         platform_device_register(&ep93xx_pcm_device);
 788 }
 789
 790 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 791                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 792
 793 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 794                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 795
 796 int ep93xx_i2s_acquire(unsigned i2s_pins, unsigned i2s_config)
 797 {
 798         unsigned val;
 799
 800         /* Sanity check */
 801         if (i2s_pins & ~EP93XX_SYSCON_DEVCFG_I2S_MASK)
 802                 return -EINVAL;
 803         if (i2s_config & ~EP93XX_I2SCLKDIV_MASK)
 804                 return -EINVAL;
 805
 806         /* Must have only one of I2SONSSP/I2SONAC97 set */
 807         if ((i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONSSP) ==
 808             (i2s_pins & EP93XX_SYSCON_DEVCFG_I2SONAC97))
 809                 return -EINVAL;
 810
 811         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 812         ep93xx_devcfg_set_bits(i2s_pins);
 813
 814         /*
 815          * This is potentially racy with the clock api for i2s_mclk, sclk and
 816          * lrclk. Since the i2s driver is the only user of those clocks we
 817          * rely on it to prevent parallel use of this function and the
 818          * clock api for the i2s clocks.
 819          */
 820         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 821         val &= ~EP93XX_I2SCLKDIV_MASK;
 822         val |= i2s_config;
 823         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 824
 825         return 0;
 826 }
 827 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 828
 829 void ep93xx_i2s_release(void)
 830 {
 831         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 832 }
 833 EXPORT_SYMBOL(ep93xx_i2s_release);
 834
 835 /*************************************************************************
 836  * EP93xx AC97 audio peripheral handling
 837  *************************************************************************/
 838 static struct resource ep93xx_ac97_resources[] = {
 839         {
 840                 .start  = EP93XX_AAC_PHYS_BASE,
 841                 .end    = EP93XX_AAC_PHYS_BASE + 0xac - 1,
 842                 .flags  = IORESOURCE_MEM,
 843         },
 844         {
 845                 .start  = IRQ_EP93XX_AACINTR,
 846                 .end    = IRQ_EP93XX_AACINTR,
 847                 .flags  = IORESOURCE_IRQ,
 848         },
 849 };
 850
 851 static struct platform_device ep93xx_ac97_device = {
 852         .name           = "ep93xx-ac97",
 853         .id             = -1,
 854         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 855         .resource       = ep93xx_ac97_resources,
 856 };
 857
 858 void __init ep93xx_register_ac97(void)
 859 {
 860         /*
 861          * Make sure that the AC97 pins are not used by I2S.
 862          */
 863         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 864
 865         platform_device_register(&ep93xx_ac97_device);
 866         platform_device_register(&ep93xx_pcm_device);
 867 }
 868
 869 extern void ep93xx_gpio_init(void);
 870
 871 void __init ep93xx_init_devices(void)
 872 {
 873         /* Disallow access to MaverickCrunch initially */
 874         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 875
 876         ep93xx_gpio_init();
 877
 878         amba_device_register(&uart1_device, &iomem_resource);
 879         amba_device_register(&uart2_device, &iomem_resource);
 880         amba_device_register(&uart3_device, &iomem_resource);
 881
 882         platform_device_register(&ep93xx_rtc_device);
 883         platform_device_register(&ep93xx_ohci_device);
 884         platform_device_register(&ep93xx_leds);
 885 }