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