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         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB),
 145         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX),
 146         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX),
 147         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX),
 148         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX),
 149         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX),
 150         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX),
 151         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX),
 152         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX),
 153 };
 154
 155 static struct platform_device ep93xx_gpio_device = {
 156         .name           = "gpio-ep93xx",
 157         .id             = -1,
 158         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 159         .resource       = ep93xx_gpio_resource,
 160 };
 161
 162 /*************************************************************************
 163  * EP93xx peripheral handling
 164  *************************************************************************/
 165 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 166
 167 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 168                                   void __iomem *base, unsigned int mctrl)
 169 {
 170         unsigned int mcr;
 171
 172         mcr = 0;
 173         if (mctrl & TIOCM_RTS)
 174                 mcr |= 2;
 175         if (mctrl & TIOCM_DTR)
 176                 mcr |= 1;
 177
 178         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 179 }
 180
 181 static struct amba_pl010_data ep93xx_uart_data = {
 182         .set_mctrl      = ep93xx_uart_set_mctrl,
 183 };
 184
 185 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
 186         { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
 187
 188 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
 189         { IRQ_EP93XX_UART2 }, NULL);
 190
 191 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
 192         { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
 193
 194 static struct resource ep93xx_rtc_resource[] = {
 195         DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
 196 };
 197
 198 static struct platform_device ep93xx_rtc_device = {
 199         .name           = "ep93xx-rtc",
 200         .id             = -1,
 201         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 202         .resource       = ep93xx_rtc_resource,
 203 };
 204
 205 /*************************************************************************
 206  * EP93xx OHCI USB Host
 207  *************************************************************************/
 208
 209 static struct clk *ep93xx_ohci_host_clock;
 210
 211 static int ep93xx_ohci_power_on(struct platform_device *pdev)
 212 {
 213         if (!ep93xx_ohci_host_clock) {
 214                 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
 215                 if (IS_ERR(ep93xx_ohci_host_clock))
 216                         return PTR_ERR(ep93xx_ohci_host_clock);
 217         }
 218
 219         return clk_enable(ep93xx_ohci_host_clock);
 220 }
 221
 222 static void ep93xx_ohci_power_off(struct platform_device *pdev)
 223 {
 224         clk_disable(ep93xx_ohci_host_clock);
 225 }
 226
 227 static struct usb_ohci_pdata ep93xx_ohci_pdata = {
 228         .power_on       = ep93xx_ohci_power_on,
 229         .power_off      = ep93xx_ohci_power_off,
 230         .power_suspend  = ep93xx_ohci_power_off,
 231 };
 232
 233 static struct resource ep93xx_ohci_resources[] = {
 234         DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
 235         DEFINE_RES_IRQ(IRQ_EP93XX_USB),
 236 };
 237
 238 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
 239
 240 static struct platform_device ep93xx_ohci_device = {
 241         .name           = "ohci-platform",
 242         .id             = -1,
 243         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 244         .resource       = ep93xx_ohci_resources,
 245         .dev            = {
 246                 .dma_mask               = &ep93xx_ohci_dma_mask,
 247                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 248                 .platform_data          = &ep93xx_ohci_pdata,
 249         },
 250 };
 251
 252 /*************************************************************************
 253  * EP93xx physmap'ed flash
 254  *************************************************************************/
 255 static struct physmap_flash_data ep93xx_flash_data;
 256
 257 static struct resource ep93xx_flash_resource = {
 258         .flags          = IORESOURCE_MEM,
 259 };
 260
 261 static struct platform_device ep93xx_flash = {
 262         .name           = "physmap-flash",
 263         .id             = 0,
 264         .dev            = {
 265                 .platform_data  = &ep93xx_flash_data,
 266         },
 267         .num_resources  = 1,
 268         .resource       = &ep93xx_flash_resource,
 269 };
 270
 271 /**
 272  * ep93xx_register_flash() - Register the external flash device.
 273  * @width:      bank width in octets
 274  * @start:      resource start address
 275  * @size:       resource size
 276  */
 277 void __init ep93xx_register_flash(unsigned int width,
 278                                   resource_size_t start, resource_size_t size)
 279 {
 280         ep93xx_flash_data.width         = width;
 281
 282         ep93xx_flash_resource.start     = start;
 283         ep93xx_flash_resource.end       = start + size - 1;
 284
 285         platform_device_register(&ep93xx_flash);
 286 }
 287
 288
 289 /*************************************************************************
 290  * EP93xx ethernet peripheral handling
 291  *************************************************************************/
 292 static struct ep93xx_eth_data ep93xx_eth_data;
 293
 294 static struct resource ep93xx_eth_resource[] = {
 295         DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
 296         DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
 297 };
 298
 299 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 300
 301 static struct platform_device ep93xx_eth_device = {
 302         .name           = "ep93xx-eth",
 303         .id             = -1,
 304         .dev            = {
 305                 .platform_data          = &ep93xx_eth_data,
 306                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 307                 .dma_mask               = &ep93xx_eth_dma_mask,
 308         },
 309         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 310         .resource       = ep93xx_eth_resource,
 311 };
 312
 313 /**
 314  * ep93xx_register_eth - Register the built-in ethernet platform device.
 315  * @data:       platform specific ethernet configuration (__initdata)
 316  * @copy_addr:  flag indicating that the MAC address should be copied
 317  *              from the IndAd registers (as programmed by the bootloader)
 318  */
 319 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 320 {
 321         if (copy_addr)
 322                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 323
 324         ep93xx_eth_data = *data;
 325         platform_device_register(&ep93xx_eth_device);
 326 }
 327
 328
 329 /*************************************************************************
 330  * EP93xx i2c peripheral handling
 331  *************************************************************************/
 332
 333 /* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
 334 static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
 335         .dev_id         = "i2c-gpio.0",
 336         .table          = {
 337                 /* Use local offsets on gpiochip/port "G" */
 338                 GPIO_LOOKUP_IDX("G", 1, NULL, 0,
 339                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 340                 GPIO_LOOKUP_IDX("G", 0, NULL, 1,
 341                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 342         },
 343 };
 344
 345 static struct platform_device ep93xx_i2c_device = {
 346         .name           = "i2c-gpio",
 347         .id             = 0,
 348         .dev            = {
 349                 .platform_data  = NULL,
 350         },
 351 };
 352
 353 /**
 354  * ep93xx_register_i2c - Register the i2c platform device.
 355  * @devices:    platform specific i2c bus device information (__initdata)
 356  * @num:        the number of devices on the i2c bus
 357  */
 358 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
 359 {
 360         /*
 361          * FIXME: this just sets the two pins as non-opendrain, as no
 362          * platforms tries to do that anyway. Flag the applicable lines
 363          * as open drain in the GPIO_LOOKUP above and the driver or
 364          * gpiolib will handle open drain/open drain emulation as need
 365          * be. Right now i2c-gpio emulates open drain which is not
 366          * optimal.
 367          */
 368         __raw_writel((0 << 1) | (0 << 0),
 369                      EP93XX_GPIO_EEDRIVE);
 370
 371         i2c_register_board_info(0, devices, num);
 372         gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
 373         platform_device_register(&ep93xx_i2c_device);
 374 }
 375
 376 /*************************************************************************
 377  * EP93xx SPI peripheral handling
 378  *************************************************************************/
 379 static struct ep93xx_spi_info ep93xx_spi_master_data;
 380
 381 static struct resource ep93xx_spi_resources[] = {
 382         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 383         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 384 };
 385
 386 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 387
 388 static struct platform_device ep93xx_spi_device = {
 389         .name           = "ep93xx-spi",
 390         .id             = 0,
 391         .dev            = {
 392                 .platform_data          = &ep93xx_spi_master_data,
 393                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 394                 .dma_mask               = &ep93xx_spi_dma_mask,
 395         },
 396         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 397         .resource       = ep93xx_spi_resources,
 398 };
 399
 400 /**
 401  * ep93xx_register_spi() - registers spi platform device
 402  * @info: ep93xx board specific spi master info (__initdata)
 403  * @devices: SPI devices to register (__initdata)
 404  * @num: number of SPI devices to register
 405  *
 406  * This function registers platform device for the EP93xx SPI controller and
 407  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 408  */
 409 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 410                                 struct spi_board_info *devices, int num)
 411 {
 412         /*
 413          * When SPI is used, we need to make sure that I2S is muxed off from
 414          * SPI pins.
 415          */
 416         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 417
 418         ep93xx_spi_master_data = *info;
 419         spi_register_board_info(devices, num);
 420         platform_device_register(&ep93xx_spi_device);
 421 }
 422
 423 /*************************************************************************
 424  * EP93xx LEDs
 425  *************************************************************************/
 426 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 427         {
 428                 .name   = "platform:grled",
 429                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 430         }, {
 431                 .name   = "platform:rdled",
 432                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 433         },
 434 };
 435
 436 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
 437         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 438         .leds           = ep93xx_led_pins,
 439 };
 440
 441 /*************************************************************************
 442  * EP93xx pwm peripheral handling
 443  *************************************************************************/
 444 static struct resource ep93xx_pwm0_resource[] = {
 445         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 446 };
 447
 448 static struct platform_device ep93xx_pwm0_device = {
 449         .name           = "ep93xx-pwm",
 450         .id             = 0,
 451         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 452         .resource       = ep93xx_pwm0_resource,
 453 };
 454
 455 static struct resource ep93xx_pwm1_resource[] = {
 456         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 457 };
 458
 459 static struct platform_device ep93xx_pwm1_device = {
 460         .name           = "ep93xx-pwm",
 461         .id             = 1,
 462         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 463         .resource       = ep93xx_pwm1_resource,
 464 };
 465
 466 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 467 {
 468         if (pwm0)
 469                 platform_device_register(&ep93xx_pwm0_device);
 470
 471         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 472         if (pwm1)
 473                 platform_device_register(&ep93xx_pwm1_device);
 474 }
 475
 476 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 477 {
 478         int err;
 479
 480         if (pdev->id == 0) {
 481                 err = 0;
 482         } else if (pdev->id == 1) {
 483                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 484                                    dev_name(&pdev->dev));
 485                 if (err)
 486                         return err;
 487                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 488                 if (err)
 489                         goto fail;
 490
 491                 /* PWM 1 output on EGPIO[14] */
 492                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 493         } else {
 494                 err = -ENODEV;
 495         }
 496
 497         return err;
 498
 499 fail:
 500         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 501         return err;
 502 }
 503 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 504
 505 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 506 {
 507         if (pdev->id == 1) {
 508                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 509                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 510
 511                 /* EGPIO[14] used for GPIO */
 512                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 513         }
 514 }
 515 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 516
 517
 518 /*************************************************************************
 519  * EP93xx video peripheral handling
 520  *************************************************************************/
 521 static struct ep93xxfb_mach_info ep93xxfb_data;
 522
 523 static struct resource ep93xx_fb_resource[] = {
 524         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 525 };
 526
 527 static struct platform_device ep93xx_fb_device = {
 528         .name                   = "ep93xx-fb",
 529         .id                     = -1,
 530         .dev                    = {
 531                 .platform_data          = &ep93xxfb_data,
 532                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 533                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 534         },
 535         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 536         .resource               = ep93xx_fb_resource,
 537 };
 538
 539 /* The backlight use a single register in the framebuffer's register space */
 540 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 541
 542 static struct resource ep93xx_bl_resources[] = {
 543         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 544                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 545 };
 546
 547 static struct platform_device ep93xx_bl_device = {
 548         .name           = "ep93xx-bl",
 549         .id             = -1,
 550         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 551         .resource       = ep93xx_bl_resources,
 552 };
 553
 554 /**
 555  * ep93xx_register_fb - Register the framebuffer platform device.
 556  * @data:       platform specific framebuffer configuration (__initdata)
 557  */
 558 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 559 {
 560         ep93xxfb_data = *data;
 561         platform_device_register(&ep93xx_fb_device);
 562         platform_device_register(&ep93xx_bl_device);
 563 }
 564
 565
 566 /*************************************************************************
 567  * EP93xx matrix keypad peripheral handling
 568  *************************************************************************/
 569 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 570
 571 static struct resource ep93xx_keypad_resource[] = {
 572         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 573         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 574 };
 575
 576 static struct platform_device ep93xx_keypad_device = {
 577         .name           = "ep93xx-keypad",
 578         .id             = -1,
 579         .dev            = {
 580                 .platform_data  = &ep93xx_keypad_data,
 581         },
 582         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 583         .resource       = ep93xx_keypad_resource,
 584 };
 585
 586 /**
 587  * ep93xx_register_keypad - Register the keypad platform device.
 588  * @data:       platform specific keypad configuration (__initdata)
 589  */
 590 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 591 {
 592         ep93xx_keypad_data = *data;
 593         platform_device_register(&ep93xx_keypad_device);
 594 }
 595
 596 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 597 {
 598         int err;
 599         int i;
 600
 601         for (i = 0; i < 8; i++) {
 602                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 603                 if (err)
 604                         goto fail_gpio_c;
 605                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 606                 if (err)
 607                         goto fail_gpio_d;
 608         }
 609
 610         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 611         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 612                                  EP93XX_SYSCON_DEVCFG_GONK);
 613
 614         return 0;
 615
 616 fail_gpio_d:
 617         gpio_free(EP93XX_GPIO_LINE_C(i));
 618 fail_gpio_c:
 619         for (--i; i >= 0; --i) {
 620                 gpio_free(EP93XX_GPIO_LINE_C(i));
 621                 gpio_free(EP93XX_GPIO_LINE_D(i));
 622         }
 623         return err;
 624 }
 625 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 626
 627 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 628 {
 629         int i;
 630
 631         for (i = 0; i < 8; i++) {
 632                 gpio_free(EP93XX_GPIO_LINE_C(i));
 633                 gpio_free(EP93XX_GPIO_LINE_D(i));
 634         }
 635
 636         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 637         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 638                                EP93XX_SYSCON_DEVCFG_GONK);
 639 }
 640 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 641
 642 /*************************************************************************
 643  * EP93xx I2S audio peripheral handling
 644  *************************************************************************/
 645 static struct resource ep93xx_i2s_resource[] = {
 646         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 647         DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
 648 };
 649
 650 static struct platform_device ep93xx_i2s_device = {
 651         .name           = "ep93xx-i2s",
 652         .id             = -1,
 653         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 654         .resource       = ep93xx_i2s_resource,
 655 };
 656
 657 static struct platform_device ep93xx_pcm_device = {
 658         .name           = "ep93xx-pcm-audio",
 659         .id             = -1,
 660 };
 661
 662 void __init ep93xx_register_i2s(void)
 663 {
 664         platform_device_register(&ep93xx_i2s_device);
 665         platform_device_register(&ep93xx_pcm_device);
 666 }
 667
 668 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 669                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 670
 671 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 672                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 673
 674 int ep93xx_i2s_acquire(void)
 675 {
 676         unsigned val;
 677
 678         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 679                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 680
 681         /*
 682          * This is potentially racy with the clock api for i2s_mclk, sclk and
 683          * lrclk. Since the i2s driver is the only user of those clocks we
 684          * rely on it to prevent parallel use of this function and the
 685          * clock api for the i2s clocks.
 686          */
 687         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 688         val &= ~EP93XX_I2SCLKDIV_MASK;
 689         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 690         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 691
 692         return 0;
 693 }
 694 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 695
 696 void ep93xx_i2s_release(void)
 697 {
 698         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 699 }
 700 EXPORT_SYMBOL(ep93xx_i2s_release);
 701
 702 /*************************************************************************
 703  * EP93xx AC97 audio peripheral handling
 704  *************************************************************************/
 705 static struct resource ep93xx_ac97_resources[] = {
 706         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 707         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 708 };
 709
 710 static struct platform_device ep93xx_ac97_device = {
 711         .name           = "ep93xx-ac97",
 712         .id             = -1,
 713         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 714         .resource       = ep93xx_ac97_resources,
 715 };
 716
 717 void __init ep93xx_register_ac97(void)
 718 {
 719         /*
 720          * Make sure that the AC97 pins are not used by I2S.
 721          */
 722         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 723
 724         platform_device_register(&ep93xx_ac97_device);
 725         platform_device_register(&ep93xx_pcm_device);
 726 }
 727
 728 /*************************************************************************
 729  * EP93xx Watchdog
 730  *************************************************************************/
 731 static struct resource ep93xx_wdt_resources[] = {
 732         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 733 };
 734
 735 static struct platform_device ep93xx_wdt_device = {
 736         .name           = "ep93xx-wdt",
 737         .id             = -1,
 738         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 739         .resource       = ep93xx_wdt_resources,
 740 };
 741
 742 /*************************************************************************
 743  * EP93xx IDE
 744  *************************************************************************/
 745 static struct resource ep93xx_ide_resources[] = {
 746         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 747         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 748 };
 749
 750 static struct platform_device ep93xx_ide_device = {
 751         .name           = "ep93xx-ide",
 752         .id             = -1,
 753         .dev            = {
 754                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 755                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 756         },
 757         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 758         .resource       = ep93xx_ide_resources,
 759 };
 760
 761 void __init ep93xx_register_ide(void)
 762 {
 763         platform_device_register(&ep93xx_ide_device);
 764 }
 765
 766 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 767 {
 768         int err;
 769         int i;
 770
 771         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 772         if (err)
 773                 return err;
 774         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 775         if (err)
 776                 goto fail_egpio15;
 777         for (i = 2; i < 8; i++) {
 778                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 779                 if (err)
 780                         goto fail_gpio_e;
 781         }
 782         for (i = 4; i < 8; i++) {
 783                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 784                 if (err)
 785                         goto fail_gpio_g;
 786         }
 787         for (i = 0; i < 8; i++) {
 788                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 789                 if (err)
 790                         goto fail_gpio_h;
 791         }
 792
 793         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 794         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 795                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 796                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 797         return 0;
 798
 799 fail_gpio_h:
 800         for (--i; i >= 0; --i)
 801                 gpio_free(EP93XX_GPIO_LINE_H(i));
 802         i = 8;
 803 fail_gpio_g:
 804         for (--i; i >= 4; --i)
 805                 gpio_free(EP93XX_GPIO_LINE_G(i));
 806         i = 8;
 807 fail_gpio_e:
 808         for (--i; i >= 2; --i)
 809                 gpio_free(EP93XX_GPIO_LINE_E(i));
 810         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 811 fail_egpio15:
 812         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 813         return err;
 814 }
 815 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 816
 817 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 818 {
 819         int i;
 820
 821         for (i = 2; i < 8; i++)
 822                 gpio_free(EP93XX_GPIO_LINE_E(i));
 823         for (i = 4; i < 8; i++)
 824                 gpio_free(EP93XX_GPIO_LINE_G(i));
 825         for (i = 0; i < 8; i++)
 826                 gpio_free(EP93XX_GPIO_LINE_H(i));
 827         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 828         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 829
 830
 831         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 832         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 833                                EP93XX_SYSCON_DEVCFG_GONIDE |
 834                                EP93XX_SYSCON_DEVCFG_HONIDE);
 835 }
 836 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 837
 838 /*************************************************************************
 839  * EP93xx ADC
 840  *************************************************************************/
 841 static struct resource ep93xx_adc_resources[] = {
 842         DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
 843         DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
 844 };
 845
 846 static struct platform_device ep93xx_adc_device = {
 847         .name           = "ep93xx-adc",
 848         .id             = -1,
 849         .num_resources  = ARRAY_SIZE(ep93xx_adc_resources),
 850         .resource       = ep93xx_adc_resources,
 851 };
 852
 853 void __init ep93xx_register_adc(void)
 854 {
 855         /* Power up ADC, deactivate Touch Screen Controller */
 856         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
 857                                 EP93XX_SYSCON_DEVCFG_ADCPD);
 858
 859         platform_device_register(&ep93xx_adc_device);
 860 }
 861
 862 /*************************************************************************
 863  * EP93xx Security peripheral
 864  *************************************************************************/
 865
 866 /*
 867  * The Maverick Key is 256 bits of micro fuses blown at the factory during
 868  * manufacturing to uniquely identify a part.
 869  *
 870  * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
 871  */
 872 #define EP93XX_SECURITY_REG(x)          (EP93XX_SECURITY_BASE + (x))
 873 #define EP93XX_SECURITY_SECFLG          EP93XX_SECURITY_REG(0x2400)
 874 #define EP93XX_SECURITY_FUSEFLG         EP93XX_SECURITY_REG(0x2410)
 875 #define EP93XX_SECURITY_UNIQID          EP93XX_SECURITY_REG(0x2440)
 876 #define EP93XX_SECURITY_UNIQCHK         EP93XX_SECURITY_REG(0x2450)
 877 #define EP93XX_SECURITY_UNIQVAL         EP93XX_SECURITY_REG(0x2460)
 878 #define EP93XX_SECURITY_SECID1          EP93XX_SECURITY_REG(0x2500)
 879 #define EP93XX_SECURITY_SECID2          EP93XX_SECURITY_REG(0x2504)
 880 #define EP93XX_SECURITY_SECCHK1         EP93XX_SECURITY_REG(0x2520)
 881 #define EP93XX_SECURITY_SECCHK2         EP93XX_SECURITY_REG(0x2524)
 882 #define EP93XX_SECURITY_UNIQID2         EP93XX_SECURITY_REG(0x2700)
 883 #define EP93XX_SECURITY_UNIQID3         EP93XX_SECURITY_REG(0x2704)
 884 #define EP93XX_SECURITY_UNIQID4         EP93XX_SECURITY_REG(0x2708)
 885 #define EP93XX_SECURITY_UNIQID5         EP93XX_SECURITY_REG(0x270c)
 886
 887 static char ep93xx_soc_id[33];
 888
 889 static const char __init *ep93xx_get_soc_id(void)
 890 {
 891         unsigned int id, id2, id3, id4, id5;
 892
 893         if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
 894                 return "bad Hamming code";
 895
 896         id = __raw_readl(EP93XX_SECURITY_UNIQID);
 897         id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
 898         id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
 899         id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
 900         id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
 901
 902         if (id != id2)
 903                 return "invalid";
 904
 905         /* Toss the unique ID into the entropy pool */
 906         add_device_randomness(&id2, 4);
 907         add_device_randomness(&id3, 4);
 908         add_device_randomness(&id4, 4);
 909         add_device_randomness(&id5, 4);
 910
 911         snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
 912                  "%08x%08x%08x%08x", id2, id3, id4, id5);
 913
 914         return ep93xx_soc_id;
 915 }
 916
 917 static const char __init *ep93xx_get_soc_rev(void)
 918 {
 919         int rev = ep93xx_chip_revision();
 920
 921         switch (rev) {
 922         case EP93XX_CHIP_REV_D0:
 923                 return "D0";
 924         case EP93XX_CHIP_REV_D1:
 925                 return "D1";
 926         case EP93XX_CHIP_REV_E0:
 927                 return "E0";
 928         case EP93XX_CHIP_REV_E1:
 929                 return "E1";
 930         case EP93XX_CHIP_REV_E2:
 931                 return "E2";
 932         default:
 933                 return "unknown";
 934         }
 935 }
 936
 937 static const char __init *ep93xx_get_machine_name(void)
 938 {
 939         return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
 940 }
 941
 942 static struct device __init *ep93xx_init_soc(void)
 943 {
 944         struct soc_device_attribute *soc_dev_attr;
 945         struct soc_device *soc_dev;
 946
 947         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 948         if (!soc_dev_attr)
 949                 return NULL;
 950
 951         soc_dev_attr->machine = ep93xx_get_machine_name();
 952         soc_dev_attr->family = "Cirrus Logic EP93xx";
 953         soc_dev_attr->revision = ep93xx_get_soc_rev();
 954         soc_dev_attr->soc_id = ep93xx_get_soc_id();
 955
 956         soc_dev = soc_device_register(soc_dev_attr);
 957         if (IS_ERR(soc_dev)) {
 958                 kfree(soc_dev_attr->machine);
 959                 kfree(soc_dev_attr);
 960                 return NULL;
 961         }
 962
 963         return soc_device_to_device(soc_dev);
 964 }
 965
 966 struct device __init *ep93xx_init_devices(void)
 967 {
 968         struct device *parent;
 969
 970         /* Disallow access to MaverickCrunch initially */
 971         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 972
 973         /* Default all ports to GPIO */
 974         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 975                                EP93XX_SYSCON_DEVCFG_GONK |
 976                                EP93XX_SYSCON_DEVCFG_EONIDE |
 977                                EP93XX_SYSCON_DEVCFG_GONIDE |
 978                                EP93XX_SYSCON_DEVCFG_HONIDE);
 979
 980         parent = ep93xx_init_soc();
 981
 982         /* Get the GPIO working early, other devices need it */
 983         platform_device_register(&ep93xx_gpio_device);
 984
 985         amba_device_register(&uart1_device, &iomem_resource);
 986         amba_device_register(&uart2_device, &iomem_resource);
 987         amba_device_register(&uart3_device, &iomem_resource);
 988
 989         platform_device_register(&ep93xx_rtc_device);
 990         platform_device_register(&ep93xx_ohci_device);
 991         platform_device_register(&ep93xx_wdt_device);
 992
 993         gpio_led_register_device(-1, &ep93xx_led_data);
 994
 995         return parent;
 996 }
 997
 998 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
 999 {
1000         /*
1001          * Set then clear the SWRST bit to initiate a software reset
1002          */
1003         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1004         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1005
1006         while (1)
1007                 ;
1008 }
1009
1010 void __init ep93xx_init_late(void)
1011 {
1012         crunch_init();
1013 }