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