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/sys_soc.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 #include <linux/reboot.h>
  39 #include <linux/usb/ohci_pdriver.h>
  40 #include <linux/random.h>
  41
  42 #include <mach/hardware.h>
  43 #include <linux/platform_data/video-ep93xx.h>
  44 #include <linux/platform_data/keypad-ep93xx.h>
  45 #include <linux/platform_data/spi-ep93xx.h>
  46 #include <mach/gpio-ep93xx.h>
  47
  48 #include <asm/mach/arch.h>
  49 #include <asm/mach/map.h>
  50
  51 #include "soc.h"
  52
  53 /*************************************************************************
  54  * Static I/O mappings that are needed for all EP93xx platforms
  55  *************************************************************************/
  56 static struct map_desc ep93xx_io_desc[] __initdata = {
  57         {
  58                 .virtual        = EP93XX_AHB_VIRT_BASE,
  59                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  60                 .length         = EP93XX_AHB_SIZE,
  61                 .type           = MT_DEVICE,
  62         }, {
  63                 .virtual        = EP93XX_APB_VIRT_BASE,
  64                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  65                 .length         = EP93XX_APB_SIZE,
  66                 .type           = MT_DEVICE,
  67         },
  68 };
  69
  70 void __init ep93xx_map_io(void)
  71 {
  72         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  73 }
  74
  75 /*************************************************************************
  76  * EP93xx IRQ handling
  77  *************************************************************************/
  78 void __init ep93xx_init_irq(void)
  79 {
  80         vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
  81         vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
  82 }
  83
  84
  85 /*************************************************************************
  86  * EP93xx System Controller Software Locked register handling
  87  *************************************************************************/
  88
  89 /*
  90  * syscon_swlock prevents anything else from writing to the syscon
  91  * block while a software locked register is being written.
  92  */
  93 static DEFINE_SPINLOCK(syscon_swlock);
  94
  95 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
  96 {
  97         unsigned long flags;
  98
  99         spin_lock_irqsave(&syscon_swlock, flags);
 100
 101         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 102         __raw_writel(val, reg);
 103
 104         spin_unlock_irqrestore(&syscon_swlock, flags);
 105 }
 106
 107 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 108 {
 109         unsigned long flags;
 110         unsigned int val;
 111
 112         spin_lock_irqsave(&syscon_swlock, flags);
 113
 114         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 115         val &= ~clear_bits;
 116         val |= set_bits;
 117         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 118         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 119
 120         spin_unlock_irqrestore(&syscon_swlock, flags);
 121 }
 122
 123 /**
 124  * ep93xx_chip_revision() - returns the EP93xx chip revision
 125  *
 126  * See <mach/platform.h> for more information.
 127  */
 128 unsigned int ep93xx_chip_revision(void)
 129 {
 130         unsigned int v;
 131
 132         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 133         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 134         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 135         return v;
 136 }
 137 EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
 138
 139 /*************************************************************************
 140  * EP93xx GPIO
 141  *************************************************************************/
 142 static struct resource ep93xx_gpio_resource[] = {
 143         DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
 144 };
 145
 146 static struct platform_device ep93xx_gpio_device = {
 147         .name           = "gpio-ep93xx",
 148         .id             = -1,
 149         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 150         .resource       = ep93xx_gpio_resource,
 151 };
 152
 153 /*************************************************************************
 154  * EP93xx peripheral handling
 155  *************************************************************************/
 156 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 157
 158 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 159                                   void __iomem *base, unsigned int mctrl)
 160 {
 161         unsigned int mcr;
 162
 163         mcr = 0;
 164         if (mctrl & TIOCM_RTS)
 165                 mcr |= 2;
 166         if (mctrl & TIOCM_DTR)
 167                 mcr |= 1;
 168
 169         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 170 }
 171
 172 static struct amba_pl010_data ep93xx_uart_data = {
 173         .set_mctrl      = ep93xx_uart_set_mctrl,
 174 };
 175
 176 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
 177         { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
 178
 179 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
 180         { IRQ_EP93XX_UART2 }, NULL);
 181
 182 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
 183         { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
 184
 185 static struct resource ep93xx_rtc_resource[] = {
 186         DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
 187 };
 188
 189 static struct platform_device ep93xx_rtc_device = {
 190         .name           = "ep93xx-rtc",
 191         .id             = -1,
 192         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 193         .resource       = ep93xx_rtc_resource,
 194 };
 195
 196 /*************************************************************************
 197  * EP93xx OHCI USB Host
 198  *************************************************************************/
 199
 200 static struct clk *ep93xx_ohci_host_clock;
 201
 202 static int ep93xx_ohci_power_on(struct platform_device *pdev)
 203 {
 204         if (!ep93xx_ohci_host_clock) {
 205                 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
 206                 if (IS_ERR(ep93xx_ohci_host_clock))
 207                         return PTR_ERR(ep93xx_ohci_host_clock);
 208         }
 209
 210         return clk_enable(ep93xx_ohci_host_clock);
 211 }
 212
 213 static void ep93xx_ohci_power_off(struct platform_device *pdev)
 214 {
 215         clk_disable(ep93xx_ohci_host_clock);
 216 }
 217
 218 static struct usb_ohci_pdata ep93xx_ohci_pdata = {
 219         .power_on       = ep93xx_ohci_power_on,
 220         .power_off      = ep93xx_ohci_power_off,
 221         .power_suspend  = ep93xx_ohci_power_off,
 222 };
 223
 224 static struct resource ep93xx_ohci_resources[] = {
 225         DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
 226         DEFINE_RES_IRQ(IRQ_EP93XX_USB),
 227 };
 228
 229 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
 230
 231 static struct platform_device ep93xx_ohci_device = {
 232         .name           = "ohci-platform",
 233         .id             = -1,
 234         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 235         .resource       = ep93xx_ohci_resources,
 236         .dev            = {
 237                 .dma_mask               = &ep93xx_ohci_dma_mask,
 238                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 239                 .platform_data          = &ep93xx_ohci_pdata,
 240         },
 241 };
 242
 243 /*************************************************************************
 244  * EP93xx physmap'ed flash
 245  *************************************************************************/
 246 static struct physmap_flash_data ep93xx_flash_data;
 247
 248 static struct resource ep93xx_flash_resource = {
 249         .flags          = IORESOURCE_MEM,
 250 };
 251
 252 static struct platform_device ep93xx_flash = {
 253         .name           = "physmap-flash",
 254         .id             = 0,
 255         .dev            = {
 256                 .platform_data  = &ep93xx_flash_data,
 257         },
 258         .num_resources  = 1,
 259         .resource       = &ep93xx_flash_resource,
 260 };
 261
 262 /**
 263  * ep93xx_register_flash() - Register the external flash device.
 264  * @width:      bank width in octets
 265  * @start:      resource start address
 266  * @size:       resource size
 267  */
 268 void __init ep93xx_register_flash(unsigned int width,
 269                                   resource_size_t start, resource_size_t size)
 270 {
 271         ep93xx_flash_data.width         = width;
 272
 273         ep93xx_flash_resource.start     = start;
 274         ep93xx_flash_resource.end       = start + size - 1;
 275
 276         platform_device_register(&ep93xx_flash);
 277 }
 278
 279
 280 /*************************************************************************
 281  * EP93xx ethernet peripheral handling
 282  *************************************************************************/
 283 static struct ep93xx_eth_data ep93xx_eth_data;
 284
 285 static struct resource ep93xx_eth_resource[] = {
 286         DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
 287         DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
 288 };
 289
 290 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 291
 292 static struct platform_device ep93xx_eth_device = {
 293         .name           = "ep93xx-eth",
 294         .id             = -1,
 295         .dev            = {
 296                 .platform_data          = &ep93xx_eth_data,
 297                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 298                 .dma_mask               = &ep93xx_eth_dma_mask,
 299         },
 300         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 301         .resource       = ep93xx_eth_resource,
 302 };
 303
 304 /**
 305  * ep93xx_register_eth - Register the built-in ethernet platform device.
 306  * @data:       platform specific ethernet configuration (__initdata)
 307  * @copy_addr:  flag indicating that the MAC address should be copied
 308  *              from the IndAd registers (as programmed by the bootloader)
 309  */
 310 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 311 {
 312         if (copy_addr)
 313                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 314
 315         ep93xx_eth_data = *data;
 316         platform_device_register(&ep93xx_eth_device);
 317 }
 318
 319
 320 /*************************************************************************
 321  * EP93xx i2c peripheral handling
 322  *************************************************************************/
 323 static struct i2c_gpio_platform_data ep93xx_i2c_data;
 324
 325 static struct platform_device ep93xx_i2c_device = {
 326         .name           = "i2c-gpio",
 327         .id             = 0,
 328         .dev            = {
 329                 .platform_data  = &ep93xx_i2c_data,
 330         },
 331 };
 332
 333 /**
 334  * ep93xx_register_i2c - Register the i2c platform device.
 335  * @data:       platform specific i2c-gpio configuration (__initdata)
 336  * @devices:    platform specific i2c bus device information (__initdata)
 337  * @num:        the number of devices on the i2c bus
 338  */
 339 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data,
 340                                 struct i2c_board_info *devices, int num)
 341 {
 342         /*
 343          * Set the EEPROM interface pin drive type control.
 344          * Defines the driver type for the EECLK and EEDAT pins as either
 345          * open drain, which will require an external pull-up, or a normal
 346          * CMOS driver.
 347          */
 348         if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT)
 349                 pr_warning("sda != EEDAT, open drain has no effect\n");
 350         if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK)
 351                 pr_warning("scl != EECLK, open drain has no effect\n");
 352
 353         __raw_writel((data->sda_is_open_drain << 1) |
 354                      (data->scl_is_open_drain << 0),
 355                      EP93XX_GPIO_EEDRIVE);
 356
 357         ep93xx_i2c_data = *data;
 358         i2c_register_board_info(0, devices, num);
 359         platform_device_register(&ep93xx_i2c_device);
 360 }
 361
 362 /*************************************************************************
 363  * EP93xx SPI peripheral handling
 364  *************************************************************************/
 365 static struct ep93xx_spi_info ep93xx_spi_master_data;
 366
 367 static struct resource ep93xx_spi_resources[] = {
 368         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 369         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 370 };
 371
 372 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 373
 374 static struct platform_device ep93xx_spi_device = {
 375         .name           = "ep93xx-spi",
 376         .id             = 0,
 377         .dev            = {
 378                 .platform_data          = &ep93xx_spi_master_data,
 379                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 380                 .dma_mask               = &ep93xx_spi_dma_mask,
 381         },
 382         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 383         .resource       = ep93xx_spi_resources,
 384 };
 385
 386 /**
 387  * ep93xx_register_spi() - registers spi platform device
 388  * @info: ep93xx board specific spi master info (__initdata)
 389  * @devices: SPI devices to register (__initdata)
 390  * @num: number of SPI devices to register
 391  *
 392  * This function registers platform device for the EP93xx SPI controller and
 393  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 394  */
 395 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 396                                 struct spi_board_info *devices, int num)
 397 {
 398         /*
 399          * When SPI is used, we need to make sure that I2S is muxed off from
 400          * SPI pins.
 401          */
 402         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 403
 404         ep93xx_spi_master_data = *info;
 405         spi_register_board_info(devices, num);
 406         platform_device_register(&ep93xx_spi_device);
 407 }
 408
 409 /*************************************************************************
 410  * EP93xx LEDs
 411  *************************************************************************/
 412 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 413         {
 414                 .name   = "platform:grled",
 415                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 416         }, {
 417                 .name   = "platform:rdled",
 418                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 419         },
 420 };
 421
 422 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
 423         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 424         .leds           = ep93xx_led_pins,
 425 };
 426
 427 /*************************************************************************
 428  * EP93xx pwm peripheral handling
 429  *************************************************************************/
 430 static struct resource ep93xx_pwm0_resource[] = {
 431         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 432 };
 433
 434 static struct platform_device ep93xx_pwm0_device = {
 435         .name           = "ep93xx-pwm",
 436         .id             = 0,
 437         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 438         .resource       = ep93xx_pwm0_resource,
 439 };
 440
 441 static struct resource ep93xx_pwm1_resource[] = {
 442         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 443 };
 444
 445 static struct platform_device ep93xx_pwm1_device = {
 446         .name           = "ep93xx-pwm",
 447         .id             = 1,
 448         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 449         .resource       = ep93xx_pwm1_resource,
 450 };
 451
 452 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 453 {
 454         if (pwm0)
 455                 platform_device_register(&ep93xx_pwm0_device);
 456
 457         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 458         if (pwm1)
 459                 platform_device_register(&ep93xx_pwm1_device);
 460 }
 461
 462 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 463 {
 464         int err;
 465
 466         if (pdev->id == 0) {
 467                 err = 0;
 468         } else if (pdev->id == 1) {
 469                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 470                                    dev_name(&pdev->dev));
 471                 if (err)
 472                         return err;
 473                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 474                 if (err)
 475                         goto fail;
 476
 477                 /* PWM 1 output on EGPIO[14] */
 478                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 479         } else {
 480                 err = -ENODEV;
 481         }
 482
 483         return err;
 484
 485 fail:
 486         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 487         return err;
 488 }
 489 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 490
 491 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 492 {
 493         if (pdev->id == 1) {
 494                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 495                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 496
 497                 /* EGPIO[14] used for GPIO */
 498                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 499         }
 500 }
 501 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 502
 503
 504 /*************************************************************************
 505  * EP93xx video peripheral handling
 506  *************************************************************************/
 507 static struct ep93xxfb_mach_info ep93xxfb_data;
 508
 509 static struct resource ep93xx_fb_resource[] = {
 510         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 511 };
 512
 513 static struct platform_device ep93xx_fb_device = {
 514         .name                   = "ep93xx-fb",
 515         .id                     = -1,
 516         .dev                    = {
 517                 .platform_data          = &ep93xxfb_data,
 518                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 519                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 520         },
 521         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 522         .resource               = ep93xx_fb_resource,
 523 };
 524
 525 /* The backlight use a single register in the framebuffer's register space */
 526 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 527
 528 static struct resource ep93xx_bl_resources[] = {
 529         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 530                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 531 };
 532
 533 static struct platform_device ep93xx_bl_device = {
 534         .name           = "ep93xx-bl",
 535         .id             = -1,
 536         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 537         .resource       = ep93xx_bl_resources,
 538 };
 539
 540 /**
 541  * ep93xx_register_fb - Register the framebuffer platform device.
 542  * @data:       platform specific framebuffer configuration (__initdata)
 543  */
 544 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 545 {
 546         ep93xxfb_data = *data;
 547         platform_device_register(&ep93xx_fb_device);
 548         platform_device_register(&ep93xx_bl_device);
 549 }
 550
 551
 552 /*************************************************************************
 553  * EP93xx matrix keypad peripheral handling
 554  *************************************************************************/
 555 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 556
 557 static struct resource ep93xx_keypad_resource[] = {
 558         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 559         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 560 };
 561
 562 static struct platform_device ep93xx_keypad_device = {
 563         .name           = "ep93xx-keypad",
 564         .id             = -1,
 565         .dev            = {
 566                 .platform_data  = &ep93xx_keypad_data,
 567         },
 568         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 569         .resource       = ep93xx_keypad_resource,
 570 };
 571
 572 /**
 573  * ep93xx_register_keypad - Register the keypad platform device.
 574  * @data:       platform specific keypad configuration (__initdata)
 575  */
 576 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 577 {
 578         ep93xx_keypad_data = *data;
 579         platform_device_register(&ep93xx_keypad_device);
 580 }
 581
 582 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 583 {
 584         int err;
 585         int i;
 586
 587         for (i = 0; i < 8; i++) {
 588                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 589                 if (err)
 590                         goto fail_gpio_c;
 591                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 592                 if (err)
 593                         goto fail_gpio_d;
 594         }
 595
 596         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 597         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 598                                  EP93XX_SYSCON_DEVCFG_GONK);
 599
 600         return 0;
 601
 602 fail_gpio_d:
 603         gpio_free(EP93XX_GPIO_LINE_C(i));
 604 fail_gpio_c:
 605         for (--i; i >= 0; --i) {
 606                 gpio_free(EP93XX_GPIO_LINE_C(i));
 607                 gpio_free(EP93XX_GPIO_LINE_D(i));
 608         }
 609         return err;
 610 }
 611 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 612
 613 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 614 {
 615         int i;
 616
 617         for (i = 0; i < 8; i++) {
 618                 gpio_free(EP93XX_GPIO_LINE_C(i));
 619                 gpio_free(EP93XX_GPIO_LINE_D(i));
 620         }
 621
 622         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 623         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 624                                EP93XX_SYSCON_DEVCFG_GONK);
 625 }
 626 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 627
 628 /*************************************************************************
 629  * EP93xx I2S audio peripheral handling
 630  *************************************************************************/
 631 static struct resource ep93xx_i2s_resource[] = {
 632         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 633 };
 634
 635 static struct platform_device ep93xx_i2s_device = {
 636         .name           = "ep93xx-i2s",
 637         .id             = -1,
 638         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 639         .resource       = ep93xx_i2s_resource,
 640 };
 641
 642 static struct platform_device ep93xx_pcm_device = {
 643         .name           = "ep93xx-pcm-audio",
 644         .id             = -1,
 645 };
 646
 647 void __init ep93xx_register_i2s(void)
 648 {
 649         platform_device_register(&ep93xx_i2s_device);
 650         platform_device_register(&ep93xx_pcm_device);
 651 }
 652
 653 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 654                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 655
 656 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 657                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 658
 659 int ep93xx_i2s_acquire(void)
 660 {
 661         unsigned val;
 662
 663         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 664                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 665
 666         /*
 667          * This is potentially racy with the clock api for i2s_mclk, sclk and
 668          * lrclk. Since the i2s driver is the only user of those clocks we
 669          * rely on it to prevent parallel use of this function and the
 670          * clock api for the i2s clocks.
 671          */
 672         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 673         val &= ~EP93XX_I2SCLKDIV_MASK;
 674         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 675         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 676
 677         return 0;
 678 }
 679 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 680
 681 void ep93xx_i2s_release(void)
 682 {
 683         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 684 }
 685 EXPORT_SYMBOL(ep93xx_i2s_release);
 686
 687 /*************************************************************************
 688  * EP93xx AC97 audio peripheral handling
 689  *************************************************************************/
 690 static struct resource ep93xx_ac97_resources[] = {
 691         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 692         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 693 };
 694
 695 static struct platform_device ep93xx_ac97_device = {
 696         .name           = "ep93xx-ac97",
 697         .id             = -1,
 698         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 699         .resource       = ep93xx_ac97_resources,
 700 };
 701
 702 void __init ep93xx_register_ac97(void)
 703 {
 704         /*
 705          * Make sure that the AC97 pins are not used by I2S.
 706          */
 707         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 708
 709         platform_device_register(&ep93xx_ac97_device);
 710         platform_device_register(&ep93xx_pcm_device);
 711 }
 712
 713 /*************************************************************************
 714  * EP93xx Watchdog
 715  *************************************************************************/
 716 static struct resource ep93xx_wdt_resources[] = {
 717         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 718 };
 719
 720 static struct platform_device ep93xx_wdt_device = {
 721         .name           = "ep93xx-wdt",
 722         .id             = -1,
 723         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 724         .resource       = ep93xx_wdt_resources,
 725 };
 726
 727 /*************************************************************************
 728  * EP93xx IDE
 729  *************************************************************************/
 730 static struct resource ep93xx_ide_resources[] = {
 731         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 732         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 733 };
 734
 735 static struct platform_device ep93xx_ide_device = {
 736         .name           = "ep93xx-ide",
 737         .id             = -1,
 738         .dev            = {
 739                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 740                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 741         },
 742         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 743         .resource       = ep93xx_ide_resources,
 744 };
 745
 746 void __init ep93xx_register_ide(void)
 747 {
 748         platform_device_register(&ep93xx_ide_device);
 749 }
 750
 751 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 752 {
 753         int err;
 754         int i;
 755
 756         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 757         if (err)
 758                 return err;
 759         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 760         if (err)
 761                 goto fail_egpio15;
 762         for (i = 2; i < 8; i++) {
 763                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 764                 if (err)
 765                         goto fail_gpio_e;
 766         }
 767         for (i = 4; i < 8; i++) {
 768                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 769                 if (err)
 770                         goto fail_gpio_g;
 771         }
 772         for (i = 0; i < 8; i++) {
 773                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 774                 if (err)
 775                         goto fail_gpio_h;
 776         }
 777
 778         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 779         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 780                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 781                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 782         return 0;
 783
 784 fail_gpio_h:
 785         for (--i; i >= 0; --i)
 786                 gpio_free(EP93XX_GPIO_LINE_H(i));
 787         i = 8;
 788 fail_gpio_g:
 789         for (--i; i >= 4; --i)
 790                 gpio_free(EP93XX_GPIO_LINE_G(i));
 791         i = 8;
 792 fail_gpio_e:
 793         for (--i; i >= 2; --i)
 794                 gpio_free(EP93XX_GPIO_LINE_E(i));
 795         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 796 fail_egpio15:
 797         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 798         return err;
 799 }
 800 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 801
 802 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 803 {
 804         int i;
 805
 806         for (i = 2; i < 8; i++)
 807                 gpio_free(EP93XX_GPIO_LINE_E(i));
 808         for (i = 4; i < 8; i++)
 809                 gpio_free(EP93XX_GPIO_LINE_G(i));
 810         for (i = 0; i < 8; i++)
 811                 gpio_free(EP93XX_GPIO_LINE_H(i));
 812         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 813         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 814
 815
 816         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 817         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 818                                EP93XX_SYSCON_DEVCFG_GONIDE |
 819                                EP93XX_SYSCON_DEVCFG_HONIDE);
 820 }
 821 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 822
 823 /*************************************************************************
 824  * EP93xx Security peripheral
 825  *************************************************************************/
 826
 827 /*
 828  * The Maverick Key is 256 bits of micro fuses blown at the factory during
 829  * manufacturing to uniquely identify a part.
 830  *
 831  * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
 832  */
 833 #define EP93XX_SECURITY_REG(x)          (EP93XX_SECURITY_BASE + (x))
 834 #define EP93XX_SECURITY_SECFLG          EP93XX_SECURITY_REG(0x2400)
 835 #define EP93XX_SECURITY_FUSEFLG         EP93XX_SECURITY_REG(0x2410)
 836 #define EP93XX_SECURITY_UNIQID          EP93XX_SECURITY_REG(0x2440)
 837 #define EP93XX_SECURITY_UNIQCHK         EP93XX_SECURITY_REG(0x2450)
 838 #define EP93XX_SECURITY_UNIQVAL         EP93XX_SECURITY_REG(0x2460)
 839 #define EP93XX_SECURITY_SECID1          EP93XX_SECURITY_REG(0x2500)
 840 #define EP93XX_SECURITY_SECID2          EP93XX_SECURITY_REG(0x2504)
 841 #define EP93XX_SECURITY_SECCHK1         EP93XX_SECURITY_REG(0x2520)
 842 #define EP93XX_SECURITY_SECCHK2         EP93XX_SECURITY_REG(0x2524)
 843 #define EP93XX_SECURITY_UNIQID2         EP93XX_SECURITY_REG(0x2700)
 844 #define EP93XX_SECURITY_UNIQID3         EP93XX_SECURITY_REG(0x2704)
 845 #define EP93XX_SECURITY_UNIQID4         EP93XX_SECURITY_REG(0x2708)
 846 #define EP93XX_SECURITY_UNIQID5         EP93XX_SECURITY_REG(0x270c)
 847
 848 static char ep93xx_soc_id[33];
 849
 850 static const char __init *ep93xx_get_soc_id(void)
 851 {
 852         unsigned int id, id2, id3, id4, id5;
 853
 854         if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
 855                 return "bad Hamming code";
 856
 857         id = __raw_readl(EP93XX_SECURITY_UNIQID);
 858         id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
 859         id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
 860         id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
 861         id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
 862
 863         if (id != id2)
 864                 return "invalid";
 865
 866         /* Toss the unique ID into the entropy pool */
 867         add_device_randomness(&id2, 4);
 868         add_device_randomness(&id3, 4);
 869         add_device_randomness(&id4, 4);
 870         add_device_randomness(&id5, 4);
 871
 872         snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
 873                  "%08x%08x%08x%08x", id2, id3, id4, id5);
 874
 875         return ep93xx_soc_id;
 876 }
 877
 878 static const char __init *ep93xx_get_soc_rev(void)
 879 {
 880         int rev = ep93xx_chip_revision();
 881
 882         switch (rev) {
 883         case EP93XX_CHIP_REV_D0:
 884                 return "D0";
 885         case EP93XX_CHIP_REV_D1:
 886                 return "D1";
 887         case EP93XX_CHIP_REV_E0:
 888                 return "E0";
 889         case EP93XX_CHIP_REV_E1:
 890                 return "E1";
 891         case EP93XX_CHIP_REV_E2:
 892                 return "E2";
 893         default:
 894                 return "unknown";
 895         }
 896 }
 897
 898 static const char __init *ep93xx_get_machine_name(void)
 899 {
 900         return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
 901 }
 902
 903 static struct device __init *ep93xx_init_soc(void)
 904 {
 905         struct soc_device_attribute *soc_dev_attr;
 906         struct soc_device *soc_dev;
 907
 908         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 909         if (!soc_dev_attr)
 910                 return NULL;
 911
 912         soc_dev_attr->machine = ep93xx_get_machine_name();
 913         soc_dev_attr->family = "Cirrus Logic EP93xx";
 914         soc_dev_attr->revision = ep93xx_get_soc_rev();
 915         soc_dev_attr->soc_id = ep93xx_get_soc_id();
 916
 917         soc_dev = soc_device_register(soc_dev_attr);
 918         if (IS_ERR(soc_dev)) {
 919                 kfree(soc_dev_attr->machine);
 920                 kfree(soc_dev_attr);
 921                 return NULL;
 922         }
 923
 924         return soc_device_to_device(soc_dev);
 925 }
 926
 927 struct device __init *ep93xx_init_devices(void)
 928 {
 929         struct device *parent;
 930
 931         /* Disallow access to MaverickCrunch initially */
 932         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 933
 934         /* Default all ports to GPIO */
 935         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 936                                EP93XX_SYSCON_DEVCFG_GONK |
 937                                EP93XX_SYSCON_DEVCFG_EONIDE |
 938                                EP93XX_SYSCON_DEVCFG_GONIDE |
 939                                EP93XX_SYSCON_DEVCFG_HONIDE);
 940
 941         parent = ep93xx_init_soc();
 942
 943         /* Get the GPIO working early, other devices need it */
 944         platform_device_register(&ep93xx_gpio_device);
 945
 946         amba_device_register(&uart1_device, &iomem_resource);
 947         amba_device_register(&uart2_device, &iomem_resource);
 948         amba_device_register(&uart3_device, &iomem_resource);
 949
 950         platform_device_register(&ep93xx_rtc_device);
 951         platform_device_register(&ep93xx_ohci_device);
 952         platform_device_register(&ep93xx_wdt_device);
 953
 954         gpio_led_register_device(-1, &ep93xx_led_data);
 955
 956         return parent;
 957 }
 958
 959 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
 960 {
 961         /*
 962          * Set then clear the SWRST bit to initiate a software reset
 963          */
 964         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 965         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 966
 967         while (1)
 968                 ;
 969 }
 970
 971 void __init ep93xx_init_late(void)
 972 {
 973         crunch_init();
 974 }