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/gpio/machine.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
 324 /* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
 325 static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
 326         .dev_id         = "i2c-gpio.0",
 327         .table          = {
 328                 /* Use local offsets on gpiochip/port "G" */
 329                 GPIO_LOOKUP_IDX("G", 1, NULL, 0,
 330                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 331                 GPIO_LOOKUP_IDX("G", 0, NULL, 1,
 332                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 333                 { }
 334         },
 335 };
 336
 337 static struct platform_device ep93xx_i2c_device = {
 338         .name           = "i2c-gpio",
 339         .id             = 0,
 340         .dev            = {
 341                 .platform_data  = NULL,
 342         },
 343 };
 344
 345 /**
 346  * ep93xx_register_i2c - Register the i2c platform device.
 347  * @devices:    platform specific i2c bus device information (__initdata)
 348  * @num:        the number of devices on the i2c bus
 349  */
 350 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
 351 {
 352         /*
 353          * FIXME: this just sets the two pins as non-opendrain, as no
 354          * platforms tries to do that anyway. Flag the applicable lines
 355          * as open drain in the GPIO_LOOKUP above and the driver or
 356          * gpiolib will handle open drain/open drain emulation as need
 357          * be. Right now i2c-gpio emulates open drain which is not
 358          * optimal.
 359          */
 360         __raw_writel((0 << 1) | (0 << 0),
 361                      EP93XX_GPIO_EEDRIVE);
 362
 363         i2c_register_board_info(0, devices, num);
 364         gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
 365         platform_device_register(&ep93xx_i2c_device);
 366 }
 367
 368 /*************************************************************************
 369  * EP93xx SPI peripheral handling
 370  *************************************************************************/
 371 static struct ep93xx_spi_info ep93xx_spi_master_data;
 372
 373 static struct resource ep93xx_spi_resources[] = {
 374         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 375         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 376 };
 377
 378 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 379
 380 static struct platform_device ep93xx_spi_device = {
 381         .name           = "ep93xx-spi",
 382         .id             = 0,
 383         .dev            = {
 384                 .platform_data          = &ep93xx_spi_master_data,
 385                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 386                 .dma_mask               = &ep93xx_spi_dma_mask,
 387         },
 388         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 389         .resource       = ep93xx_spi_resources,
 390 };
 391
 392 /**
 393  * ep93xx_register_spi() - registers spi platform device
 394  * @info: ep93xx board specific spi master info (__initdata)
 395  * @devices: SPI devices to register (__initdata)
 396  * @num: number of SPI devices to register
 397  *
 398  * This function registers platform device for the EP93xx SPI controller and
 399  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 400  */
 401 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 402                                 struct spi_board_info *devices, int num)
 403 {
 404         /*
 405          * When SPI is used, we need to make sure that I2S is muxed off from
 406          * SPI pins.
 407          */
 408         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 409
 410         ep93xx_spi_master_data = *info;
 411         spi_register_board_info(devices, num);
 412         platform_device_register(&ep93xx_spi_device);
 413 }
 414
 415 /*************************************************************************
 416  * EP93xx LEDs
 417  *************************************************************************/
 418 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 419         {
 420                 .name   = "platform:grled",
 421                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 422         }, {
 423                 .name   = "platform:rdled",
 424                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 425         },
 426 };
 427
 428 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
 429         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 430         .leds           = ep93xx_led_pins,
 431 };
 432
 433 /*************************************************************************
 434  * EP93xx pwm peripheral handling
 435  *************************************************************************/
 436 static struct resource ep93xx_pwm0_resource[] = {
 437         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 438 };
 439
 440 static struct platform_device ep93xx_pwm0_device = {
 441         .name           = "ep93xx-pwm",
 442         .id             = 0,
 443         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 444         .resource       = ep93xx_pwm0_resource,
 445 };
 446
 447 static struct resource ep93xx_pwm1_resource[] = {
 448         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 449 };
 450
 451 static struct platform_device ep93xx_pwm1_device = {
 452         .name           = "ep93xx-pwm",
 453         .id             = 1,
 454         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 455         .resource       = ep93xx_pwm1_resource,
 456 };
 457
 458 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 459 {
 460         if (pwm0)
 461                 platform_device_register(&ep93xx_pwm0_device);
 462
 463         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 464         if (pwm1)
 465                 platform_device_register(&ep93xx_pwm1_device);
 466 }
 467
 468 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 469 {
 470         int err;
 471
 472         if (pdev->id == 0) {
 473                 err = 0;
 474         } else if (pdev->id == 1) {
 475                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 476                                    dev_name(&pdev->dev));
 477                 if (err)
 478                         return err;
 479                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 480                 if (err)
 481                         goto fail;
 482
 483                 /* PWM 1 output on EGPIO[14] */
 484                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 485         } else {
 486                 err = -ENODEV;
 487         }
 488
 489         return err;
 490
 491 fail:
 492         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 493         return err;
 494 }
 495 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 496
 497 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 498 {
 499         if (pdev->id == 1) {
 500                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 501                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 502
 503                 /* EGPIO[14] used for GPIO */
 504                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 505         }
 506 }
 507 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 508
 509
 510 /*************************************************************************
 511  * EP93xx video peripheral handling
 512  *************************************************************************/
 513 static struct ep93xxfb_mach_info ep93xxfb_data;
 514
 515 static struct resource ep93xx_fb_resource[] = {
 516         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 517 };
 518
 519 static struct platform_device ep93xx_fb_device = {
 520         .name                   = "ep93xx-fb",
 521         .id                     = -1,
 522         .dev                    = {
 523                 .platform_data          = &ep93xxfb_data,
 524                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 525                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 526         },
 527         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 528         .resource               = ep93xx_fb_resource,
 529 };
 530
 531 /* The backlight use a single register in the framebuffer's register space */
 532 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 533
 534 static struct resource ep93xx_bl_resources[] = {
 535         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 536                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 537 };
 538
 539 static struct platform_device ep93xx_bl_device = {
 540         .name           = "ep93xx-bl",
 541         .id             = -1,
 542         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 543         .resource       = ep93xx_bl_resources,
 544 };
 545
 546 /**
 547  * ep93xx_register_fb - Register the framebuffer platform device.
 548  * @data:       platform specific framebuffer configuration (__initdata)
 549  */
 550 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 551 {
 552         ep93xxfb_data = *data;
 553         platform_device_register(&ep93xx_fb_device);
 554         platform_device_register(&ep93xx_bl_device);
 555 }
 556
 557
 558 /*************************************************************************
 559  * EP93xx matrix keypad peripheral handling
 560  *************************************************************************/
 561 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 562
 563 static struct resource ep93xx_keypad_resource[] = {
 564         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 565         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 566 };
 567
 568 static struct platform_device ep93xx_keypad_device = {
 569         .name           = "ep93xx-keypad",
 570         .id             = -1,
 571         .dev            = {
 572                 .platform_data  = &ep93xx_keypad_data,
 573         },
 574         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 575         .resource       = ep93xx_keypad_resource,
 576 };
 577
 578 /**
 579  * ep93xx_register_keypad - Register the keypad platform device.
 580  * @data:       platform specific keypad configuration (__initdata)
 581  */
 582 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 583 {
 584         ep93xx_keypad_data = *data;
 585         platform_device_register(&ep93xx_keypad_device);
 586 }
 587
 588 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 589 {
 590         int err;
 591         int i;
 592
 593         for (i = 0; i < 8; i++) {
 594                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 595                 if (err)
 596                         goto fail_gpio_c;
 597                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 598                 if (err)
 599                         goto fail_gpio_d;
 600         }
 601
 602         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 603         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 604                                  EP93XX_SYSCON_DEVCFG_GONK);
 605
 606         return 0;
 607
 608 fail_gpio_d:
 609         gpio_free(EP93XX_GPIO_LINE_C(i));
 610 fail_gpio_c:
 611         for (--i; i >= 0; --i) {
 612                 gpio_free(EP93XX_GPIO_LINE_C(i));
 613                 gpio_free(EP93XX_GPIO_LINE_D(i));
 614         }
 615         return err;
 616 }
 617 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 618
 619 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 620 {
 621         int i;
 622
 623         for (i = 0; i < 8; i++) {
 624                 gpio_free(EP93XX_GPIO_LINE_C(i));
 625                 gpio_free(EP93XX_GPIO_LINE_D(i));
 626         }
 627
 628         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 629         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 630                                EP93XX_SYSCON_DEVCFG_GONK);
 631 }
 632 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 633
 634 /*************************************************************************
 635  * EP93xx I2S audio peripheral handling
 636  *************************************************************************/
 637 static struct resource ep93xx_i2s_resource[] = {
 638         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 639         DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
 640 };
 641
 642 static struct platform_device ep93xx_i2s_device = {
 643         .name           = "ep93xx-i2s",
 644         .id             = -1,
 645         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 646         .resource       = ep93xx_i2s_resource,
 647 };
 648
 649 static struct platform_device ep93xx_pcm_device = {
 650         .name           = "ep93xx-pcm-audio",
 651         .id             = -1,
 652 };
 653
 654 void __init ep93xx_register_i2s(void)
 655 {
 656         platform_device_register(&ep93xx_i2s_device);
 657         platform_device_register(&ep93xx_pcm_device);
 658 }
 659
 660 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 661                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 662
 663 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 664                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 665
 666 int ep93xx_i2s_acquire(void)
 667 {
 668         unsigned val;
 669
 670         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 671                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 672
 673         /*
 674          * This is potentially racy with the clock api for i2s_mclk, sclk and
 675          * lrclk. Since the i2s driver is the only user of those clocks we
 676          * rely on it to prevent parallel use of this function and the
 677          * clock api for the i2s clocks.
 678          */
 679         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 680         val &= ~EP93XX_I2SCLKDIV_MASK;
 681         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 682         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 683
 684         return 0;
 685 }
 686 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 687
 688 void ep93xx_i2s_release(void)
 689 {
 690         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 691 }
 692 EXPORT_SYMBOL(ep93xx_i2s_release);
 693
 694 /*************************************************************************
 695  * EP93xx AC97 audio peripheral handling
 696  *************************************************************************/
 697 static struct resource ep93xx_ac97_resources[] = {
 698         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 699         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 700 };
 701
 702 static struct platform_device ep93xx_ac97_device = {
 703         .name           = "ep93xx-ac97",
 704         .id             = -1,
 705         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 706         .resource       = ep93xx_ac97_resources,
 707 };
 708
 709 void __init ep93xx_register_ac97(void)
 710 {
 711         /*
 712          * Make sure that the AC97 pins are not used by I2S.
 713          */
 714         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 715
 716         platform_device_register(&ep93xx_ac97_device);
 717         platform_device_register(&ep93xx_pcm_device);
 718 }
 719
 720 /*************************************************************************
 721  * EP93xx Watchdog
 722  *************************************************************************/
 723 static struct resource ep93xx_wdt_resources[] = {
 724         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 725 };
 726
 727 static struct platform_device ep93xx_wdt_device = {
 728         .name           = "ep93xx-wdt",
 729         .id             = -1,
 730         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 731         .resource       = ep93xx_wdt_resources,
 732 };
 733
 734 /*************************************************************************
 735  * EP93xx IDE
 736  *************************************************************************/
 737 static struct resource ep93xx_ide_resources[] = {
 738         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 739         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 740 };
 741
 742 static struct platform_device ep93xx_ide_device = {
 743         .name           = "ep93xx-ide",
 744         .id             = -1,
 745         .dev            = {
 746                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 747                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 748         },
 749         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 750         .resource       = ep93xx_ide_resources,
 751 };
 752
 753 void __init ep93xx_register_ide(void)
 754 {
 755         platform_device_register(&ep93xx_ide_device);
 756 }
 757
 758 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 759 {
 760         int err;
 761         int i;
 762
 763         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 764         if (err)
 765                 return err;
 766         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 767         if (err)
 768                 goto fail_egpio15;
 769         for (i = 2; i < 8; i++) {
 770                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 771                 if (err)
 772                         goto fail_gpio_e;
 773         }
 774         for (i = 4; i < 8; i++) {
 775                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 776                 if (err)
 777                         goto fail_gpio_g;
 778         }
 779         for (i = 0; i < 8; i++) {
 780                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 781                 if (err)
 782                         goto fail_gpio_h;
 783         }
 784
 785         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 786         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 787                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 788                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 789         return 0;
 790
 791 fail_gpio_h:
 792         for (--i; i >= 0; --i)
 793                 gpio_free(EP93XX_GPIO_LINE_H(i));
 794         i = 8;
 795 fail_gpio_g:
 796         for (--i; i >= 4; --i)
 797                 gpio_free(EP93XX_GPIO_LINE_G(i));
 798         i = 8;
 799 fail_gpio_e:
 800         for (--i; i >= 2; --i)
 801                 gpio_free(EP93XX_GPIO_LINE_E(i));
 802         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 803 fail_egpio15:
 804         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 805         return err;
 806 }
 807 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 808
 809 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 810 {
 811         int i;
 812
 813         for (i = 2; i < 8; i++)
 814                 gpio_free(EP93XX_GPIO_LINE_E(i));
 815         for (i = 4; i < 8; i++)
 816                 gpio_free(EP93XX_GPIO_LINE_G(i));
 817         for (i = 0; i < 8; i++)
 818                 gpio_free(EP93XX_GPIO_LINE_H(i));
 819         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 820         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 821
 822
 823         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 824         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 825                                EP93XX_SYSCON_DEVCFG_GONIDE |
 826                                EP93XX_SYSCON_DEVCFG_HONIDE);
 827 }
 828 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 829
 830 /*************************************************************************
 831  * EP93xx ADC
 832  *************************************************************************/
 833 static struct resource ep93xx_adc_resources[] = {
 834         DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
 835         DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
 836 };
 837
 838 static struct platform_device ep93xx_adc_device = {
 839         .name           = "ep93xx-adc",
 840         .id             = -1,
 841         .num_resources  = ARRAY_SIZE(ep93xx_adc_resources),
 842         .resource       = ep93xx_adc_resources,
 843 };
 844
 845 void __init ep93xx_register_adc(void)
 846 {
 847         /* Power up ADC, deactivate Touch Screen Controller */
 848         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
 849                                 EP93XX_SYSCON_DEVCFG_ADCPD);
 850
 851         platform_device_register(&ep93xx_adc_device);
 852 }
 853
 854 /*************************************************************************
 855  * EP93xx Security peripheral
 856  *************************************************************************/
 857
 858 /*
 859  * The Maverick Key is 256 bits of micro fuses blown at the factory during
 860  * manufacturing to uniquely identify a part.
 861  *
 862  * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
 863  */
 864 #define EP93XX_SECURITY_REG(x)          (EP93XX_SECURITY_BASE + (x))
 865 #define EP93XX_SECURITY_SECFLG          EP93XX_SECURITY_REG(0x2400)
 866 #define EP93XX_SECURITY_FUSEFLG         EP93XX_SECURITY_REG(0x2410)
 867 #define EP93XX_SECURITY_UNIQID          EP93XX_SECURITY_REG(0x2440)
 868 #define EP93XX_SECURITY_UNIQCHK         EP93XX_SECURITY_REG(0x2450)
 869 #define EP93XX_SECURITY_UNIQVAL         EP93XX_SECURITY_REG(0x2460)
 870 #define EP93XX_SECURITY_SECID1          EP93XX_SECURITY_REG(0x2500)
 871 #define EP93XX_SECURITY_SECID2          EP93XX_SECURITY_REG(0x2504)
 872 #define EP93XX_SECURITY_SECCHK1         EP93XX_SECURITY_REG(0x2520)
 873 #define EP93XX_SECURITY_SECCHK2         EP93XX_SECURITY_REG(0x2524)
 874 #define EP93XX_SECURITY_UNIQID2         EP93XX_SECURITY_REG(0x2700)
 875 #define EP93XX_SECURITY_UNIQID3         EP93XX_SECURITY_REG(0x2704)
 876 #define EP93XX_SECURITY_UNIQID4         EP93XX_SECURITY_REG(0x2708)
 877 #define EP93XX_SECURITY_UNIQID5         EP93XX_SECURITY_REG(0x270c)
 878
 879 static char ep93xx_soc_id[33];
 880
 881 static const char __init *ep93xx_get_soc_id(void)
 882 {
 883         unsigned int id, id2, id3, id4, id5;
 884
 885         if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
 886                 return "bad Hamming code";
 887
 888         id = __raw_readl(EP93XX_SECURITY_UNIQID);
 889         id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
 890         id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
 891         id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
 892         id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
 893
 894         if (id != id2)
 895                 return "invalid";
 896
 897         /* Toss the unique ID into the entropy pool */
 898         add_device_randomness(&id2, 4);
 899         add_device_randomness(&id3, 4);
 900         add_device_randomness(&id4, 4);
 901         add_device_randomness(&id5, 4);
 902
 903         snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
 904                  "%08x%08x%08x%08x", id2, id3, id4, id5);
 905
 906         return ep93xx_soc_id;
 907 }
 908
 909 static const char __init *ep93xx_get_soc_rev(void)
 910 {
 911         int rev = ep93xx_chip_revision();
 912
 913         switch (rev) {
 914         case EP93XX_CHIP_REV_D0:
 915                 return "D0";
 916         case EP93XX_CHIP_REV_D1:
 917                 return "D1";
 918         case EP93XX_CHIP_REV_E0:
 919                 return "E0";
 920         case EP93XX_CHIP_REV_E1:
 921                 return "E1";
 922         case EP93XX_CHIP_REV_E2:
 923                 return "E2";
 924         default:
 925                 return "unknown";
 926         }
 927 }
 928
 929 static const char __init *ep93xx_get_machine_name(void)
 930 {
 931         return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
 932 }
 933
 934 static struct device __init *ep93xx_init_soc(void)
 935 {
 936         struct soc_device_attribute *soc_dev_attr;
 937         struct soc_device *soc_dev;
 938
 939         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 940         if (!soc_dev_attr)
 941                 return NULL;
 942
 943         soc_dev_attr->machine = ep93xx_get_machine_name();
 944         soc_dev_attr->family = "Cirrus Logic EP93xx";
 945         soc_dev_attr->revision = ep93xx_get_soc_rev();
 946         soc_dev_attr->soc_id = ep93xx_get_soc_id();
 947
 948         soc_dev = soc_device_register(soc_dev_attr);
 949         if (IS_ERR(soc_dev)) {
 950                 kfree(soc_dev_attr->machine);
 951                 kfree(soc_dev_attr);
 952                 return NULL;
 953         }
 954
 955         return soc_device_to_device(soc_dev);
 956 }
 957
 958 struct device __init *ep93xx_init_devices(void)
 959 {
 960         struct device *parent;
 961
 962         /* Disallow access to MaverickCrunch initially */
 963         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 964
 965         /* Default all ports to GPIO */
 966         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 967                                EP93XX_SYSCON_DEVCFG_GONK |
 968                                EP93XX_SYSCON_DEVCFG_EONIDE |
 969                                EP93XX_SYSCON_DEVCFG_GONIDE |
 970                                EP93XX_SYSCON_DEVCFG_HONIDE);
 971
 972         parent = ep93xx_init_soc();
 973
 974         /* Get the GPIO working early, other devices need it */
 975         platform_device_register(&ep93xx_gpio_device);
 976
 977         amba_device_register(&uart1_device, &iomem_resource);
 978         amba_device_register(&uart2_device, &iomem_resource);
 979         amba_device_register(&uart3_device, &iomem_resource);
 980
 981         platform_device_register(&ep93xx_rtc_device);
 982         platform_device_register(&ep93xx_ohci_device);
 983         platform_device_register(&ep93xx_wdt_device);
 984
 985         gpio_led_register_device(-1, &ep93xx_led_data);
 986
 987         return parent;
 988 }
 989
 990 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
 991 {
 992         /*
 993          * Set then clear the SWRST bit to initiate a software reset
 994          */
 995         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 996         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
 997
 998         while (1)
 999                 ;
1000 }
1001
1002 void __init ep93xx_init_late(void)
1003 {
1004         crunch_init();
1005 }