arch/arm/mach-ep93xx/core.c

   1 /*
   2  * arch/arm/mach-ep93xx/core.c
   3  * Core routines for Cirrus EP93xx chips.
   4  *
   5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6  * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
   7  *
   8  * Thanks go to Michael Burian and Ray Lehtiniemi for their key
   9  * role in the ep93xx linux community.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  */
  16
  17 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/timex.h>
  25 #include <linux/irq.h>
  26 #include <linux/io.h>
  27 #include <linux/gpio.h>
  28 #include <linux/leds.h>
  29 #include <linux/termios.h>
  30 #include <linux/amba/bus.h>
  31 #include <linux/amba/serial.h>
  32 #include <linux/mtd/physmap.h>
  33 #include <linux/i2c.h>
  34 #include <linux/i2c-gpio.h>
  35 #include <linux/spi/spi.h>
  36 #include <linux/export.h>
  37 #include <linux/irqchip/arm-vic.h>
  38
  39 #include <mach/hardware.h>
  40 #include <linux/platform_data/video-ep93xx.h>
  41 #include <linux/platform_data/keypad-ep93xx.h>
  42 #include <linux/platform_data/spi-ep93xx.h>
  43 #include <mach/gpio-ep93xx.h>
  44
  45 #include <asm/mach/map.h>
  46 #include <asm/mach/time.h>
  47
  48 #include "soc.h"
  49
  50 /*************************************************************************
  51  * Static I/O mappings that are needed for all EP93xx platforms
  52  *************************************************************************/
  53 static struct map_desc ep93xx_io_desc[] __initdata = {
  54         {
  55                 .virtual        = EP93XX_AHB_VIRT_BASE,
  56                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  57                 .length         = EP93XX_AHB_SIZE,
  58                 .type           = MT_DEVICE,
  59         }, {
  60                 .virtual        = EP93XX_APB_VIRT_BASE,
  61                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  62                 .length         = EP93XX_APB_SIZE,
  63                 .type           = MT_DEVICE,
  64         },
  65 };
  66
  67 void __init ep93xx_map_io(void)
  68 {
  69         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  70 }
  71
  72
  73 /*************************************************************************
  74  * Timer handling for EP93xx
  75  *************************************************************************
  76  * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
  77  * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
  78  * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
  79  * is free-running, and can't generate interrupts.
  80  *
  81  * The 508 kHz timers are ideal for use for the timer interrupt, as the
  82  * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
  83  * bit timers (timer 1) since we don't need more than 16 bits of reload
  84  * value as long as HZ >= 8.
  85  *
  86  * The higher clock rate of timer 4 makes it a better choice than the
  87  * other timers for use in gettimeoffset(), while the fact that it can't
  88  * generate interrupts means we don't have to worry about not being able
  89  * to use this timer for something else.  We also use timer 4 for keeping
  90  * track of lost jiffies.
  91  */
  92 #define EP93XX_TIMER_REG(x)             (EP93XX_TIMER_BASE + (x))
  93 #define EP93XX_TIMER1_LOAD              EP93XX_TIMER_REG(0x00)
  94 #define EP93XX_TIMER1_VALUE             EP93XX_TIMER_REG(0x04)
  95 #define EP93XX_TIMER1_CONTROL           EP93XX_TIMER_REG(0x08)
  96 #define EP93XX_TIMER123_CONTROL_ENABLE  (1 << 7)
  97 #define EP93XX_TIMER123_CONTROL_MODE    (1 << 6)
  98 #define EP93XX_TIMER123_CONTROL_CLKSEL  (1 << 3)
  99 #define EP93XX_TIMER1_CLEAR             EP93XX_TIMER_REG(0x0c)
 100 #define EP93XX_TIMER2_LOAD              EP93XX_TIMER_REG(0x20)
 101 #define EP93XX_TIMER2_VALUE             EP93XX_TIMER_REG(0x24)
 102 #define EP93XX_TIMER2_CONTROL           EP93XX_TIMER_REG(0x28)
 103 #define EP93XX_TIMER2_CLEAR             EP93XX_TIMER_REG(0x2c)
 104 #define EP93XX_TIMER4_VALUE_LOW         EP93XX_TIMER_REG(0x60)
 105 #define EP93XX_TIMER4_VALUE_HIGH        EP93XX_TIMER_REG(0x64)
 106 #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8)
 107 #define EP93XX_TIMER3_LOAD              EP93XX_TIMER_REG(0x80)
 108 #define EP93XX_TIMER3_VALUE             EP93XX_TIMER_REG(0x84)
 109 #define EP93XX_TIMER3_CONTROL           EP93XX_TIMER_REG(0x88)
 110 #define EP93XX_TIMER3_CLEAR             EP93XX_TIMER_REG(0x8c)
 111
 112 #define EP93XX_TIMER123_CLOCK           508469
 113 #define EP93XX_TIMER4_CLOCK             983040
 114
 115 #define TIMER1_RELOAD                   ((EP93XX_TIMER123_CLOCK / HZ) - 1)
 116 #define TIMER4_TICKS_PER_JIFFY          DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 117
 118 static unsigned int last_jiffy_time;
 119
 120 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 121 {
 122         /* Writing any value clears the timer interrupt */
 123         __raw_writel(1, EP93XX_TIMER1_CLEAR);
 124
 125         /* Recover lost jiffies */
 126         while ((signed long)
 127                 (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time)
 128                                                 >= TIMER4_TICKS_PER_JIFFY) {
 129                 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
 130                 timer_tick();
 131         }
 132
 133         return IRQ_HANDLED;
 134 }
 135
 136 static struct irqaction ep93xx_timer_irq = {
 137         .name           = "ep93xx timer",
 138         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 139         .handler        = ep93xx_timer_interrupt,
 140 };
 141
 142 static 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
 208 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 209 {
 210         unsigned long flags;
 211         unsigned int val;
 212
 213         spin_lock_irqsave(&syscon_swlock, flags);
 214
 215         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 216         val &= ~clear_bits;
 217         val |= set_bits;
 218         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 219         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 220
 221         spin_unlock_irqrestore(&syscon_swlock, flags);
 222 }
 223
 224 /**
 225  * ep93xx_chip_revision() - returns the EP93xx chip revision
 226  *
 227  * See <mach/platform.h> for more information.
 228  */
 229 unsigned int ep93xx_chip_revision(void)
 230 {
 231         unsigned int v;
 232
 233         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 234         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 235         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 236         return v;
 237 }
 238
 239 /*************************************************************************
 240  * EP93xx GPIO
 241  *************************************************************************/
 242 static struct resource ep93xx_gpio_resource[] = {
 243         DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
 244 };
 245
 246 static struct platform_device ep93xx_gpio_device = {
 247         .name           = "gpio-ep93xx",
 248         .id             = -1,
 249         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 250         .resource       = ep93xx_gpio_resource,
 251 };
 252
 253 /*************************************************************************
 254  * EP93xx peripheral handling
 255  *************************************************************************/
 256 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 257
 258 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 259                                   void __iomem *base, unsigned int mctrl)
 260 {
 261         unsigned int mcr;
 262
 263         mcr = 0;
 264         if (mctrl & TIOCM_RTS)
 265                 mcr |= 2;
 266         if (mctrl & TIOCM_DTR)
 267                 mcr |= 1;
 268
 269         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 270 }
 271
 272 static struct amba_pl010_data ep93xx_uart_data = {
 273         .set_mctrl      = ep93xx_uart_set_mctrl,
 274 };
 275
 276 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
 277         { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
 278
 279 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
 280         { IRQ_EP93XX_UART2 }, &ep93xx_uart_data);
 281
 282 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
 283         { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
 284
 285 static struct resource ep93xx_rtc_resource[] = {
 286         DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
 287 };
 288
 289 static struct platform_device ep93xx_rtc_device = {
 290         .name           = "ep93xx-rtc",
 291         .id             = -1,
 292         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 293         .resource       = ep93xx_rtc_resource,
 294 };
 295
 296
 297 static struct resource ep93xx_ohci_resources[] = {
 298         DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
 299         DEFINE_RES_IRQ(IRQ_EP93XX_USB),
 300 };
 301
 302
 303 static struct platform_device ep93xx_ohci_device = {
 304         .name           = "ep93xx-ohci",
 305         .id             = -1,
 306         .dev            = {
 307                 .dma_mask               = &ep93xx_ohci_device.dev.coherent_dma_mask,
 308                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 309         },
 310         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 311         .resource       = ep93xx_ohci_resources,
 312 };
 313
 314
 315 /*************************************************************************
 316  * EP93xx physmap'ed flash
 317  *************************************************************************/
 318 static struct physmap_flash_data ep93xx_flash_data;
 319
 320 static struct resource ep93xx_flash_resource = {
 321         .flags          = IORESOURCE_MEM,
 322 };
 323
 324 static struct platform_device ep93xx_flash = {
 325         .name           = "physmap-flash",
 326         .id             = 0,
 327         .dev            = {
 328                 .platform_data  = &ep93xx_flash_data,
 329         },
 330         .num_resources  = 1,
 331         .resource       = &ep93xx_flash_resource,
 332 };
 333
 334 /**
 335  * ep93xx_register_flash() - Register the external flash device.
 336  * @width:      bank width in octets
 337  * @start:      resource start address
 338  * @size:       resource size
 339  */
 340 void __init ep93xx_register_flash(unsigned int width,
 341                                   resource_size_t start, resource_size_t size)
 342 {
 343         ep93xx_flash_data.width         = width;
 344
 345         ep93xx_flash_resource.start     = start;
 346         ep93xx_flash_resource.end       = start + size - 1;
 347
 348         platform_device_register(&ep93xx_flash);
 349 }
 350
 351
 352 /*************************************************************************
 353  * EP93xx ethernet peripheral handling
 354  *************************************************************************/
 355 static struct ep93xx_eth_data ep93xx_eth_data;
 356
 357 static struct resource ep93xx_eth_resource[] = {
 358         DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
 359         DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
 360 };
 361
 362 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 363
 364 static struct platform_device ep93xx_eth_device = {
 365         .name           = "ep93xx-eth",
 366         .id             = -1,
 367         .dev            = {
 368                 .platform_data          = &ep93xx_eth_data,
 369                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 370                 .dma_mask               = &ep93xx_eth_dma_mask,
 371         },
 372         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 373         .resource       = ep93xx_eth_resource,
 374 };
 375
 376 /**
 377  * ep93xx_register_eth - Register the built-in ethernet platform device.
 378  * @data:       platform specific ethernet configuration (__initdata)
 379  * @copy_addr:  flag indicating that the MAC address should be copied
 380  *              from the IndAd registers (as programmed by the bootloader)
 381  */
 382 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 383 {
 384         if (copy_addr)
 385                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 386
 387         ep93xx_eth_data = *data;
 388         platform_device_register(&ep93xx_eth_device);
 389 }
 390
 391
 392 /*************************************************************************
 393  * EP93xx i2c peripheral handling
 394  *************************************************************************/
 395 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 396
 397 static struct platform_device ep93xx_i2c_device = {
 398         .name           = "i2c-gpio",
 399         .id             = 0,
 400         .dev            = {
 401                 .platform_data  = &ep93xx_i2c_data,
 402         },
 403 };
 404
 405 /**
 406  * ep93xx_register_i2c - Register the i2c platform device.
 407  * @data:       platform specific i2c-gpio configuration (__initdata)
 408  * @devices:    platform specific i2c bus device information (__initdata)
 409  * @num:        the number of devices on the i2c bus
 410  */
 411 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 412                                 struct i2c_board_info *devices, int num)
 413 {
 414         /*
 415          * Set the EEPROM interface pin drive type control.
 416          * Defines the driver type for the EECLK and EEDAT pins as either
 417          * open drain, which will require an external pull-up, or a normal
 418          * CMOS driver.
 419          */
 420         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 421                 pr_warning("sda != EEDAT, open drain has no effect\n");
 422         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 423                 pr_warning("scl != EECLK, open drain has no effect\n");
 424
 425         __raw_writel((data->sda_is_open_drain << 1) |
 426                      (data->scl_is_open_drain << 0),
 427                      EP93XX_GPIO_EEDRIVE);
 428
 429         ep93xx_i2c_data = *data;
 430         i2c_register_board_info(0, devices, num);
 431         platform_device_register(&ep93xx_i2c_device);
 432 }
 433
 434 /*************************************************************************
 435  * EP93xx SPI peripheral handling
 436  *************************************************************************/
 437 static struct ep93xx_spi_info ep93xx_spi_master_data;
 438
 439 static struct resource ep93xx_spi_resources[] = {
 440         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 441         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 442 };
 443
 444 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 445
 446 static struct platform_device ep93xx_spi_device = {
 447         .name           = "ep93xx-spi",
 448         .id             = 0,
 449         .dev            = {
 450                 .platform_data          = &ep93xx_spi_master_data,
 451                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 452                 .dma_mask               = &ep93xx_spi_dma_mask,
 453         },
 454         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 455         .resource       = ep93xx_spi_resources,
 456 };
 457
 458 /**
 459  * ep93xx_register_spi() - registers spi platform device
 460  * @info: ep93xx board specific spi master info (__initdata)
 461  * @devices: SPI devices to register (__initdata)
 462  * @num: number of SPI devices to register
 463  *
 464  * This function registers platform device for the EP93xx SPI controller and
 465  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 466  */
 467 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 468                                 struct spi_board_info *devices, int num)
 469 {
 470         /*
 471          * When SPI is used, we need to make sure that I2S is muxed off from
 472          * SPI pins.
 473          */
 474         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 475
 476         ep93xx_spi_master_data = *info;
 477         spi_register_board_info(devices, num);
 478         platform_device_register(&ep93xx_spi_device);
 479 }
 480
 481 /*************************************************************************
 482  * EP93xx LEDs
 483  *************************************************************************/
 484 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 485         {
 486                 .name   = "platform:grled",
 487                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 488         }, {
 489                 .name   = "platform:rdled",
 490                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 491         },
 492 };
 493
 494 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
 495         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 496         .leds           = ep93xx_led_pins,
 497 };
 498
 499 /*************************************************************************
 500  * EP93xx pwm peripheral handling
 501  *************************************************************************/
 502 static struct resource ep93xx_pwm0_resource[] = {
 503         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 504 };
 505
 506 static struct platform_device ep93xx_pwm0_device = {
 507         .name           = "ep93xx-pwm",
 508         .id             = 0,
 509         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 510         .resource       = ep93xx_pwm0_resource,
 511 };
 512
 513 static struct resource ep93xx_pwm1_resource[] = {
 514         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 515 };
 516
 517 static struct platform_device ep93xx_pwm1_device = {
 518         .name           = "ep93xx-pwm",
 519         .id             = 1,
 520         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 521         .resource       = ep93xx_pwm1_resource,
 522 };
 523
 524 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 525 {
 526         if (pwm0)
 527                 platform_device_register(&ep93xx_pwm0_device);
 528
 529         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 530         if (pwm1)
 531                 platform_device_register(&ep93xx_pwm1_device);
 532 }
 533
 534 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 535 {
 536         int err;
 537
 538         if (pdev->id == 0) {
 539                 err = 0;
 540         } else if (pdev->id == 1) {
 541                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 542                                    dev_name(&pdev->dev));
 543                 if (err)
 544                         return err;
 545                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 546                 if (err)
 547                         goto fail;
 548
 549                 /* PWM 1 output on EGPIO[14] */
 550                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 551         } else {
 552                 err = -ENODEV;
 553         }
 554
 555         return err;
 556
 557 fail:
 558         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 559         return err;
 560 }
 561 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 562
 563 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 564 {
 565         if (pdev->id == 1) {
 566                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 567                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 568
 569                 /* EGPIO[14] used for GPIO */
 570                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 571         }
 572 }
 573 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 574
 575
 576 /*************************************************************************
 577  * EP93xx video peripheral handling
 578  *************************************************************************/
 579 static struct ep93xxfb_mach_info ep93xxfb_data;
 580
 581 static struct resource ep93xx_fb_resource[] = {
 582         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 583 };
 584
 585 static struct platform_device ep93xx_fb_device = {
 586         .name                   = "ep93xx-fb",
 587         .id                     = -1,
 588         .dev                    = {
 589                 .platform_data          = &ep93xxfb_data,
 590                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 591                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 592         },
 593         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 594         .resource               = ep93xx_fb_resource,
 595 };
 596
 597 /* The backlight use a single register in the framebuffer's register space */
 598 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 599
 600 static struct resource ep93xx_bl_resources[] = {
 601         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 602                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 603 };
 604
 605 static struct platform_device ep93xx_bl_device = {
 606         .name           = "ep93xx-bl",
 607         .id             = -1,
 608         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 609         .resource       = ep93xx_bl_resources,
 610 };
 611
 612 /**
 613  * ep93xx_register_fb - Register the framebuffer platform device.
 614  * @data:       platform specific framebuffer configuration (__initdata)
 615  */
 616 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 617 {
 618         ep93xxfb_data = *data;
 619         platform_device_register(&ep93xx_fb_device);
 620         platform_device_register(&ep93xx_bl_device);
 621 }
 622
 623
 624 /*************************************************************************
 625  * EP93xx matrix keypad peripheral handling
 626  *************************************************************************/
 627 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 628
 629 static struct resource ep93xx_keypad_resource[] = {
 630         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 631         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 632 };
 633
 634 static struct platform_device ep93xx_keypad_device = {
 635         .name           = "ep93xx-keypad",
 636         .id             = -1,
 637         .dev            = {
 638                 .platform_data  = &ep93xx_keypad_data,
 639         },
 640         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 641         .resource       = ep93xx_keypad_resource,
 642 };
 643
 644 /**
 645  * ep93xx_register_keypad - Register the keypad platform device.
 646  * @data:       platform specific keypad configuration (__initdata)
 647  */
 648 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 649 {
 650         ep93xx_keypad_data = *data;
 651         platform_device_register(&ep93xx_keypad_device);
 652 }
 653
 654 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 655 {
 656         int err;
 657         int i;
 658
 659         for (i = 0; i < 8; i++) {
 660                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 661                 if (err)
 662                         goto fail_gpio_c;
 663                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 664                 if (err)
 665                         goto fail_gpio_d;
 666         }
 667
 668         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 669         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 670                                  EP93XX_SYSCON_DEVCFG_GONK);
 671
 672         return 0;
 673
 674 fail_gpio_d:
 675         gpio_free(EP93XX_GPIO_LINE_C(i));
 676 fail_gpio_c:
 677         for (--i; i >= 0; --i) {
 678                 gpio_free(EP93XX_GPIO_LINE_C(i));
 679                 gpio_free(EP93XX_GPIO_LINE_D(i));
 680         }
 681         return err;
 682 }
 683 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 684
 685 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 686 {
 687         int i;
 688
 689         for (i = 0; i < 8; i++) {
 690                 gpio_free(EP93XX_GPIO_LINE_C(i));
 691                 gpio_free(EP93XX_GPIO_LINE_D(i));
 692         }
 693
 694         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 695         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 696                                EP93XX_SYSCON_DEVCFG_GONK);
 697 }
 698 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 699
 700 /*************************************************************************
 701  * EP93xx I2S audio peripheral handling
 702  *************************************************************************/
 703 static struct resource ep93xx_i2s_resource[] = {
 704         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 705 };
 706
 707 static struct platform_device ep93xx_i2s_device = {
 708         .name           = "ep93xx-i2s",
 709         .id             = -1,
 710         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 711         .resource       = ep93xx_i2s_resource,
 712 };
 713
 714 static struct platform_device ep93xx_pcm_device = {
 715         .name           = "ep93xx-pcm-audio",
 716         .id             = -1,
 717 };
 718
 719 void __init ep93xx_register_i2s(void)
 720 {
 721         platform_device_register(&ep93xx_i2s_device);
 722         platform_device_register(&ep93xx_pcm_device);
 723 }
 724
 725 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 726                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 727
 728 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 729                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 730
 731 int ep93xx_i2s_acquire(void)
 732 {
 733         unsigned val;
 734
 735         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 736                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 737
 738         /*
 739          * This is potentially racy with the clock api for i2s_mclk, sclk and
 740          * lrclk. Since the i2s driver is the only user of those clocks we
 741          * rely on it to prevent parallel use of this function and the
 742          * clock api for the i2s clocks.
 743          */
 744         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 745         val &= ~EP93XX_I2SCLKDIV_MASK;
 746         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 747         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 748
 749         return 0;
 750 }
 751 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 752
 753 void ep93xx_i2s_release(void)
 754 {
 755         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 756 }
 757 EXPORT_SYMBOL(ep93xx_i2s_release);
 758
 759 /*************************************************************************
 760  * EP93xx AC97 audio peripheral handling
 761  *************************************************************************/
 762 static struct resource ep93xx_ac97_resources[] = {
 763         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 764         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 765 };
 766
 767 static struct platform_device ep93xx_ac97_device = {
 768         .name           = "ep93xx-ac97",
 769         .id             = -1,
 770         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 771         .resource       = ep93xx_ac97_resources,
 772 };
 773
 774 void __init ep93xx_register_ac97(void)
 775 {
 776         /*
 777          * Make sure that the AC97 pins are not used by I2S.
 778          */
 779         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 780
 781         platform_device_register(&ep93xx_ac97_device);
 782         platform_device_register(&ep93xx_pcm_device);
 783 }
 784
 785 /*************************************************************************
 786  * EP93xx Watchdog
 787  *************************************************************************/
 788 static struct resource ep93xx_wdt_resources[] = {
 789         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 790 };
 791
 792 static struct platform_device ep93xx_wdt_device = {
 793         .name           = "ep93xx-wdt",
 794         .id             = -1,
 795         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 796         .resource       = ep93xx_wdt_resources,
 797 };
 798
 799 /*************************************************************************
 800  * EP93xx IDE
 801  *************************************************************************/
 802 static struct resource ep93xx_ide_resources[] = {
 803         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 804         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 805 };
 806
 807 static struct platform_device ep93xx_ide_device = {
 808         .name           = "ep93xx-ide",
 809         .id             = -1,
 810         .dev            = {
 811                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 812                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 813         },
 814         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 815         .resource       = ep93xx_ide_resources,
 816 };
 817
 818 void __init ep93xx_register_ide(void)
 819 {
 820         platform_device_register(&ep93xx_ide_device);
 821 }
 822
 823 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 824 {
 825         int err;
 826         int i;
 827
 828         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 829         if (err)
 830                 return err;
 831         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 832         if (err)
 833                 goto fail_egpio15;
 834         for (i = 2; i < 8; i++) {
 835                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 836                 if (err)
 837                         goto fail_gpio_e;
 838         }
 839         for (i = 4; i < 8; i++) {
 840                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 841                 if (err)
 842                         goto fail_gpio_g;
 843         }
 844         for (i = 0; i < 8; i++) {
 845                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 846                 if (err)
 847                         goto fail_gpio_h;
 848         }
 849
 850         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 851         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 852                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 853                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 854         return 0;
 855
 856 fail_gpio_h:
 857         for (--i; i >= 0; --i)
 858                 gpio_free(EP93XX_GPIO_LINE_H(i));
 859         i = 8;
 860 fail_gpio_g:
 861         for (--i; i >= 4; --i)
 862                 gpio_free(EP93XX_GPIO_LINE_G(i));
 863         i = 8;
 864 fail_gpio_e:
 865         for (--i; i >= 2; --i)
 866                 gpio_free(EP93XX_GPIO_LINE_E(i));
 867         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 868 fail_egpio15:
 869         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 870         return err;
 871 }
 872 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 873
 874 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 875 {
 876         int i;
 877
 878         for (i = 2; i < 8; i++)
 879                 gpio_free(EP93XX_GPIO_LINE_E(i));
 880         for (i = 4; i < 8; i++)
 881                 gpio_free(EP93XX_GPIO_LINE_G(i));
 882         for (i = 0; i < 8; i++)
 883                 gpio_free(EP93XX_GPIO_LINE_H(i));
 884         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 885         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 886
 887
 888         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 889         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 890                                EP93XX_SYSCON_DEVCFG_GONIDE |
 891                                EP93XX_SYSCON_DEVCFG_HONIDE);
 892 }
 893 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 894
 895 void __init ep93xx_init_devices(void)
 896 {
 897         /* Disallow access to MaverickCrunch initially */
 898         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 899
 900         /* Default all ports to GPIO */
 901         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 902                                EP93XX_SYSCON_DEVCFG_GONK |
 903                                EP93XX_SYSCON_DEVCFG_EONIDE |
 904                                EP93XX_SYSCON_DEVCFG_GONIDE |
 905                                EP93XX_SYSCON_DEVCFG_HONIDE);
 906
 907         /* Get the GPIO working early, other devices need it */
 908         platform_device_register(&ep93xx_gpio_device);
 909
 910         amba_device_register(&uart1_device, &iomem_resource);
 911         amba_device_register(&uart2_device, &iomem_resource);
 912         amba_device_register(&uart3_device, &iomem_resource);
 913
 914         platform_device_register(&ep93xx_rtc_device);
 915         platform_device_register(&ep93xx_ohci_device);
 916         platform_device_register(&ep93xx_wdt_device);
 917
 918         gpio_led_register_device(-1, &ep93xx_led_data);
 919 }
 920
 921 void ep93xx_restart(char mode, const char *cmd)
 922 {
 923         /*
 924          * Set then clear the SWRST bit to initiate a software reset
 925          */
 926         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 927         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 928
 929         while (1)
 930                 ;
 931 }
 932
 933 void __init ep93xx_init_late(void)
 934 {
 935         crunch_init();
 936 }