arch/arm/mach-ep93xx/core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/arm/mach-ep93xx/core.c
   4  * Core routines for Cirrus EP93xx chips.
   5  *
   6  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   7  * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
   8  *
   9  * Thanks go to Michael Burian and Ray Lehtiniemi for their key
  10  * role in the ep93xx linux community.
  11  */
  12
  13 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/sys_soc.h>
  21 #include <linux/irq.h>
  22 #include <linux/io.h>
  23 #include <linux/gpio.h>
  24 #include <linux/leds.h>
  25 #include <linux/termios.h>
  26 #include <linux/amba/bus.h>
  27 #include <linux/amba/serial.h>
  28 #include <linux/mtd/physmap.h>
  29 #include <linux/i2c.h>
  30 #include <linux/gpio/machine.h>
  31 #include <linux/spi/spi.h>
  32 #include <linux/export.h>
  33 #include <linux/irqchip/arm-vic.h>
  34 #include <linux/reboot.h>
  35 #include <linux/usb/ohci_pdriver.h>
  36 #include <linux/random.h>
  37
  38 #include "hardware.h"
  39 #include <linux/platform_data/video-ep93xx.h>
  40 #include <linux/platform_data/keypad-ep93xx.h>
  41 #include <linux/platform_data/spi-ep93xx.h>
  42 #include <linux/soc/cirrus/ep93xx.h>
  43
  44 #include "gpio-ep93xx.h"
  45
  46 #include <asm/mach/arch.h>
  47 #include <asm/mach/map.h>
  48
  49 #include "soc.h"
  50
  51 /*************************************************************************
  52  * Static I/O mappings that are needed for all EP93xx platforms
  53  *************************************************************************/
  54 static struct map_desc ep93xx_io_desc[] __initdata = {
  55         {
  56                 .virtual        = EP93XX_AHB_VIRT_BASE,
  57                 .pfn            = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
  58                 .length         = EP93XX_AHB_SIZE,
  59                 .type           = MT_DEVICE,
  60         }, {
  61                 .virtual        = EP93XX_APB_VIRT_BASE,
  62                 .pfn            = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
  63                 .length         = EP93XX_APB_SIZE,
  64                 .type           = MT_DEVICE,
  65         },
  66 };
  67
  68 void __init ep93xx_map_io(void)
  69 {
  70         iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
  71 }
  72
  73 /*************************************************************************
  74  * EP93xx IRQ handling
  75  *************************************************************************/
  76 void __init ep93xx_init_irq(void)
  77 {
  78         vic_init(EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
  79         vic_init(EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK, 0);
  80 }
  81
  82
  83 /*************************************************************************
  84  * EP93xx System Controller Software Locked register handling
  85  *************************************************************************/
  86
  87 /*
  88  * syscon_swlock prevents anything else from writing to the syscon
  89  * block while a software locked register is being written.
  90  */
  91 static DEFINE_SPINLOCK(syscon_swlock);
  92
  93 void ep93xx_syscon_swlocked_write(unsigned int val, void __iomem *reg)
  94 {
  95         unsigned long flags;
  96
  97         spin_lock_irqsave(&syscon_swlock, flags);
  98
  99         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 100         __raw_writel(val, reg);
 101
 102         spin_unlock_irqrestore(&syscon_swlock, flags);
 103 }
 104
 105 void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits)
 106 {
 107         unsigned long flags;
 108         unsigned int val;
 109
 110         spin_lock_irqsave(&syscon_swlock, flags);
 111
 112         val = __raw_readl(EP93XX_SYSCON_DEVCFG);
 113         val &= ~clear_bits;
 114         val |= set_bits;
 115         __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
 116         __raw_writel(val, EP93XX_SYSCON_DEVCFG);
 117
 118         spin_unlock_irqrestore(&syscon_swlock, flags);
 119 }
 120
 121 /**
 122  * ep93xx_chip_revision() - returns the EP93xx chip revision
 123  *
 124  * See "platform.h" for more information.
 125  */
 126 unsigned int ep93xx_chip_revision(void)
 127 {
 128         unsigned int v;
 129
 130         v = __raw_readl(EP93XX_SYSCON_SYSCFG);
 131         v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
 132         v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
 133         return v;
 134 }
 135 EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
 136
 137 /*************************************************************************
 138  * EP93xx GPIO
 139  *************************************************************************/
 140 static struct resource ep93xx_gpio_resource[] = {
 141         DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc),
 142         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO_AB),
 143         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO0MUX),
 144         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO1MUX),
 145         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO2MUX),
 146         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO3MUX),
 147         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO4MUX),
 148         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO5MUX),
 149         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO6MUX),
 150         DEFINE_RES_IRQ(IRQ_EP93XX_GPIO7MUX),
 151 };
 152
 153 static struct platform_device ep93xx_gpio_device = {
 154         .name           = "gpio-ep93xx",
 155         .id             = -1,
 156         .num_resources  = ARRAY_SIZE(ep93xx_gpio_resource),
 157         .resource       = ep93xx_gpio_resource,
 158 };
 159
 160 /*************************************************************************
 161  * EP93xx peripheral handling
 162  *************************************************************************/
 163 #define EP93XX_UART_MCR_OFFSET          (0x0100)
 164
 165 static void ep93xx_uart_set_mctrl(struct amba_device *dev,
 166                                   void __iomem *base, unsigned int mctrl)
 167 {
 168         unsigned int mcr;
 169
 170         mcr = 0;
 171         if (mctrl & TIOCM_RTS)
 172                 mcr |= 2;
 173         if (mctrl & TIOCM_DTR)
 174                 mcr |= 1;
 175
 176         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
 177 }
 178
 179 static struct amba_pl010_data ep93xx_uart_data = {
 180         .set_mctrl      = ep93xx_uart_set_mctrl,
 181 };
 182
 183 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE,
 184         { IRQ_EP93XX_UART1 }, &ep93xx_uart_data);
 185
 186 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE,
 187         { IRQ_EP93XX_UART2 }, NULL);
 188
 189 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE,
 190         { IRQ_EP93XX_UART3 }, &ep93xx_uart_data);
 191
 192 static struct resource ep93xx_rtc_resource[] = {
 193         DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c),
 194 };
 195
 196 static struct platform_device ep93xx_rtc_device = {
 197         .name           = "ep93xx-rtc",
 198         .id             = -1,
 199         .num_resources  = ARRAY_SIZE(ep93xx_rtc_resource),
 200         .resource       = ep93xx_rtc_resource,
 201 };
 202
 203 /*************************************************************************
 204  * EP93xx OHCI USB Host
 205  *************************************************************************/
 206
 207 static struct clk *ep93xx_ohci_host_clock;
 208
 209 static int ep93xx_ohci_power_on(struct platform_device *pdev)
 210 {
 211         if (!ep93xx_ohci_host_clock) {
 212                 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
 213                 if (IS_ERR(ep93xx_ohci_host_clock))
 214                         return PTR_ERR(ep93xx_ohci_host_clock);
 215         }
 216
 217         return clk_enable(ep93xx_ohci_host_clock);
 218 }
 219
 220 static void ep93xx_ohci_power_off(struct platform_device *pdev)
 221 {
 222         clk_disable(ep93xx_ohci_host_clock);
 223 }
 224
 225 static struct usb_ohci_pdata ep93xx_ohci_pdata = {
 226         .power_on       = ep93xx_ohci_power_on,
 227         .power_off      = ep93xx_ohci_power_off,
 228         .power_suspend  = ep93xx_ohci_power_off,
 229 };
 230
 231 static struct resource ep93xx_ohci_resources[] = {
 232         DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
 233         DEFINE_RES_IRQ(IRQ_EP93XX_USB),
 234 };
 235
 236 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
 237
 238 static struct platform_device ep93xx_ohci_device = {
 239         .name           = "ohci-platform",
 240         .id             = -1,
 241         .num_resources  = ARRAY_SIZE(ep93xx_ohci_resources),
 242         .resource       = ep93xx_ohci_resources,
 243         .dev            = {
 244                 .dma_mask               = &ep93xx_ohci_dma_mask,
 245                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 246                 .platform_data          = &ep93xx_ohci_pdata,
 247         },
 248 };
 249
 250 /*************************************************************************
 251  * EP93xx physmap'ed flash
 252  *************************************************************************/
 253 static struct physmap_flash_data ep93xx_flash_data;
 254
 255 static struct resource ep93xx_flash_resource = {
 256         .flags          = IORESOURCE_MEM,
 257 };
 258
 259 static struct platform_device ep93xx_flash = {
 260         .name           = "physmap-flash",
 261         .id             = 0,
 262         .dev            = {
 263                 .platform_data  = &ep93xx_flash_data,
 264         },
 265         .num_resources  = 1,
 266         .resource       = &ep93xx_flash_resource,
 267 };
 268
 269 /**
 270  * ep93xx_register_flash() - Register the external flash device.
 271  * @width:      bank width in octets
 272  * @start:      resource start address
 273  * @size:       resource size
 274  */
 275 void __init ep93xx_register_flash(unsigned int width,
 276                                   resource_size_t start, resource_size_t size)
 277 {
 278         ep93xx_flash_data.width         = width;
 279
 280         ep93xx_flash_resource.start     = start;
 281         ep93xx_flash_resource.end       = start + size - 1;
 282
 283         platform_device_register(&ep93xx_flash);
 284 }
 285
 286
 287 /*************************************************************************
 288  * EP93xx ethernet peripheral handling
 289  *************************************************************************/
 290 static struct ep93xx_eth_data ep93xx_eth_data;
 291
 292 static struct resource ep93xx_eth_resource[] = {
 293         DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000),
 294         DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET),
 295 };
 296
 297 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32);
 298
 299 static struct platform_device ep93xx_eth_device = {
 300         .name           = "ep93xx-eth",
 301         .id             = -1,
 302         .dev            = {
 303                 .platform_data          = &ep93xx_eth_data,
 304                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 305                 .dma_mask               = &ep93xx_eth_dma_mask,
 306         },
 307         .num_resources  = ARRAY_SIZE(ep93xx_eth_resource),
 308         .resource       = ep93xx_eth_resource,
 309 };
 310
 311 /**
 312  * ep93xx_register_eth - Register the built-in ethernet platform device.
 313  * @data:       platform specific ethernet configuration (__initdata)
 314  * @copy_addr:  flag indicating that the MAC address should be copied
 315  *              from the IndAd registers (as programmed by the bootloader)
 316  */
 317 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
 318 {
 319         if (copy_addr)
 320                 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6);
 321
 322         ep93xx_eth_data = *data;
 323         platform_device_register(&ep93xx_eth_device);
 324 }
 325
 326
 327 /*************************************************************************
 328  * EP93xx i2c peripheral handling
 329  *************************************************************************/
 330
 331 /* All EP93xx devices use the same two GPIO pins for I2C bit-banging */
 332 static struct gpiod_lookup_table ep93xx_i2c_gpiod_table = {
 333         .dev_id         = "i2c-gpio.0",
 334         .table          = {
 335                 /* Use local offsets on gpiochip/port "G" */
 336                 GPIO_LOOKUP_IDX("G", 1, NULL, 0,
 337                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 338                 GPIO_LOOKUP_IDX("G", 0, NULL, 1,
 339                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 340                 { }
 341         },
 342 };
 343
 344 static struct platform_device ep93xx_i2c_device = {
 345         .name           = "i2c-gpio",
 346         .id             = 0,
 347         .dev            = {
 348                 .platform_data  = NULL,
 349         },
 350 };
 351
 352 /**
 353  * ep93xx_register_i2c - Register the i2c platform device.
 354  * @devices:    platform specific i2c bus device information (__initdata)
 355  * @num:        the number of devices on the i2c bus
 356  */
 357 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
 358 {
 359         /*
 360          * FIXME: this just sets the two pins as non-opendrain, as no
 361          * platforms tries to do that anyway. Flag the applicable lines
 362          * as open drain in the GPIO_LOOKUP above and the driver or
 363          * gpiolib will handle open drain/open drain emulation as need
 364          * be. Right now i2c-gpio emulates open drain which is not
 365          * optimal.
 366          */
 367         __raw_writel((0 << 1) | (0 << 0),
 368                      EP93XX_GPIO_EEDRIVE);
 369
 370         i2c_register_board_info(0, devices, num);
 371         gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
 372         platform_device_register(&ep93xx_i2c_device);
 373 }
 374
 375 /*************************************************************************
 376  * EP93xx SPI peripheral handling
 377  *************************************************************************/
 378 static struct ep93xx_spi_info ep93xx_spi_master_data;
 379
 380 static struct resource ep93xx_spi_resources[] = {
 381         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 382         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 383 };
 384
 385 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 386
 387 static struct platform_device ep93xx_spi_device = {
 388         .name           = "ep93xx-spi",
 389         .id             = 0,
 390         .dev            = {
 391                 .platform_data          = &ep93xx_spi_master_data,
 392                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 393                 .dma_mask               = &ep93xx_spi_dma_mask,
 394         },
 395         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 396         .resource       = ep93xx_spi_resources,
 397 };
 398
 399 /**
 400  * ep93xx_register_spi() - registers spi platform device
 401  * @info: ep93xx board specific spi master info (__initdata)
 402  * @devices: SPI devices to register (__initdata)
 403  * @num: number of SPI devices to register
 404  *
 405  * This function registers platform device for the EP93xx SPI controller and
 406  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 407  */
 408 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 409                                 struct spi_board_info *devices, int num)
 410 {
 411         /*
 412          * When SPI is used, we need to make sure that I2S is muxed off from
 413          * SPI pins.
 414          */
 415         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 416
 417         ep93xx_spi_master_data = *info;
 418         spi_register_board_info(devices, num);
 419         platform_device_register(&ep93xx_spi_device);
 420 }
 421
 422 /*************************************************************************
 423  * EP93xx LEDs
 424  *************************************************************************/
 425 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 426         {
 427                 .name   = "platform:grled",
 428                 .gpio   = EP93XX_GPIO_LINE_GRLED,
 429         }, {
 430                 .name   = "platform:rdled",
 431                 .gpio   = EP93XX_GPIO_LINE_RDLED,
 432         },
 433 };
 434
 435 static const struct gpio_led_platform_data ep93xx_led_data __initconst = {
 436         .num_leds       = ARRAY_SIZE(ep93xx_led_pins),
 437         .leds           = ep93xx_led_pins,
 438 };
 439
 440 /*************************************************************************
 441  * EP93xx pwm peripheral handling
 442  *************************************************************************/
 443 static struct resource ep93xx_pwm0_resource[] = {
 444         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 445 };
 446
 447 static struct platform_device ep93xx_pwm0_device = {
 448         .name           = "ep93xx-pwm",
 449         .id             = 0,
 450         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 451         .resource       = ep93xx_pwm0_resource,
 452 };
 453
 454 static struct resource ep93xx_pwm1_resource[] = {
 455         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 456 };
 457
 458 static struct platform_device ep93xx_pwm1_device = {
 459         .name           = "ep93xx-pwm",
 460         .id             = 1,
 461         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 462         .resource       = ep93xx_pwm1_resource,
 463 };
 464
 465 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 466 {
 467         if (pwm0)
 468                 platform_device_register(&ep93xx_pwm0_device);
 469
 470         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 471         if (pwm1)
 472                 platform_device_register(&ep93xx_pwm1_device);
 473 }
 474
 475 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 476 {
 477         int err;
 478
 479         if (pdev->id == 0) {
 480                 err = 0;
 481         } else if (pdev->id == 1) {
 482                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 483                                    dev_name(&pdev->dev));
 484                 if (err)
 485                         return err;
 486                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 487                 if (err)
 488                         goto fail;
 489
 490                 /* PWM 1 output on EGPIO[14] */
 491                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 492         } else {
 493                 err = -ENODEV;
 494         }
 495
 496         return err;
 497
 498 fail:
 499         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 500         return err;
 501 }
 502 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 503
 504 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 505 {
 506         if (pdev->id == 1) {
 507                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 508                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 509
 510                 /* EGPIO[14] used for GPIO */
 511                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 512         }
 513 }
 514 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 515
 516
 517 /*************************************************************************
 518  * EP93xx video peripheral handling
 519  *************************************************************************/
 520 static struct ep93xxfb_mach_info ep93xxfb_data;
 521
 522 static struct resource ep93xx_fb_resource[] = {
 523         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 524 };
 525
 526 static struct platform_device ep93xx_fb_device = {
 527         .name                   = "ep93xx-fb",
 528         .id                     = -1,
 529         .dev                    = {
 530                 .platform_data          = &ep93xxfb_data,
 531                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 532                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 533         },
 534         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 535         .resource               = ep93xx_fb_resource,
 536 };
 537
 538 /* The backlight use a single register in the framebuffer's register space */
 539 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 540
 541 static struct resource ep93xx_bl_resources[] = {
 542         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 543                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 544 };
 545
 546 static struct platform_device ep93xx_bl_device = {
 547         .name           = "ep93xx-bl",
 548         .id             = -1,
 549         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 550         .resource       = ep93xx_bl_resources,
 551 };
 552
 553 /**
 554  * ep93xx_register_fb - Register the framebuffer platform device.
 555  * @data:       platform specific framebuffer configuration (__initdata)
 556  */
 557 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 558 {
 559         ep93xxfb_data = *data;
 560         platform_device_register(&ep93xx_fb_device);
 561         platform_device_register(&ep93xx_bl_device);
 562 }
 563
 564
 565 /*************************************************************************
 566  * EP93xx matrix keypad peripheral handling
 567  *************************************************************************/
 568 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 569
 570 static struct resource ep93xx_keypad_resource[] = {
 571         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 572         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 573 };
 574
 575 static struct platform_device ep93xx_keypad_device = {
 576         .name           = "ep93xx-keypad",
 577         .id             = -1,
 578         .dev            = {
 579                 .platform_data  = &ep93xx_keypad_data,
 580         },
 581         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 582         .resource       = ep93xx_keypad_resource,
 583 };
 584
 585 /**
 586  * ep93xx_register_keypad - Register the keypad platform device.
 587  * @data:       platform specific keypad configuration (__initdata)
 588  */
 589 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 590 {
 591         ep93xx_keypad_data = *data;
 592         platform_device_register(&ep93xx_keypad_device);
 593 }
 594
 595 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 596 {
 597         int err;
 598         int i;
 599
 600         for (i = 0; i < 8; i++) {
 601                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 602                 if (err)
 603                         goto fail_gpio_c;
 604                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 605                 if (err)
 606                         goto fail_gpio_d;
 607         }
 608
 609         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 610         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 611                                  EP93XX_SYSCON_DEVCFG_GONK);
 612
 613         return 0;
 614
 615 fail_gpio_d:
 616         gpio_free(EP93XX_GPIO_LINE_C(i));
 617 fail_gpio_c:
 618         for (--i; i >= 0; --i) {
 619                 gpio_free(EP93XX_GPIO_LINE_C(i));
 620                 gpio_free(EP93XX_GPIO_LINE_D(i));
 621         }
 622         return err;
 623 }
 624 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 625
 626 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 627 {
 628         int i;
 629
 630         for (i = 0; i < 8; i++) {
 631                 gpio_free(EP93XX_GPIO_LINE_C(i));
 632                 gpio_free(EP93XX_GPIO_LINE_D(i));
 633         }
 634
 635         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 636         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 637                                EP93XX_SYSCON_DEVCFG_GONK);
 638 }
 639 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 640
 641 /*************************************************************************
 642  * EP93xx I2S audio peripheral handling
 643  *************************************************************************/
 644 static struct resource ep93xx_i2s_resource[] = {
 645         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 646         DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
 647 };
 648
 649 static struct platform_device ep93xx_i2s_device = {
 650         .name           = "ep93xx-i2s",
 651         .id             = -1,
 652         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 653         .resource       = ep93xx_i2s_resource,
 654 };
 655
 656 static struct platform_device ep93xx_pcm_device = {
 657         .name           = "ep93xx-pcm-audio",
 658         .id             = -1,
 659 };
 660
 661 void __init ep93xx_register_i2s(void)
 662 {
 663         platform_device_register(&ep93xx_i2s_device);
 664         platform_device_register(&ep93xx_pcm_device);
 665 }
 666
 667 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 668                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 669
 670 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 671                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 672
 673 int ep93xx_i2s_acquire(void)
 674 {
 675         unsigned val;
 676
 677         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 678                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 679
 680         /*
 681          * This is potentially racy with the clock api for i2s_mclk, sclk and
 682          * lrclk. Since the i2s driver is the only user of those clocks we
 683          * rely on it to prevent parallel use of this function and the
 684          * clock api for the i2s clocks.
 685          */
 686         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 687         val &= ~EP93XX_I2SCLKDIV_MASK;
 688         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 689         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 690
 691         return 0;
 692 }
 693 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 694
 695 void ep93xx_i2s_release(void)
 696 {
 697         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 698 }
 699 EXPORT_SYMBOL(ep93xx_i2s_release);
 700
 701 /*************************************************************************
 702  * EP93xx AC97 audio peripheral handling
 703  *************************************************************************/
 704 static struct resource ep93xx_ac97_resources[] = {
 705         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 706         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 707 };
 708
 709 static struct platform_device ep93xx_ac97_device = {
 710         .name           = "ep93xx-ac97",
 711         .id             = -1,
 712         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 713         .resource       = ep93xx_ac97_resources,
 714 };
 715
 716 void __init ep93xx_register_ac97(void)
 717 {
 718         /*
 719          * Make sure that the AC97 pins are not used by I2S.
 720          */
 721         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 722
 723         platform_device_register(&ep93xx_ac97_device);
 724         platform_device_register(&ep93xx_pcm_device);
 725 }
 726
 727 /*************************************************************************
 728  * EP93xx Watchdog
 729  *************************************************************************/
 730 static struct resource ep93xx_wdt_resources[] = {
 731         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 732 };
 733
 734 static struct platform_device ep93xx_wdt_device = {
 735         .name           = "ep93xx-wdt",
 736         .id             = -1,
 737         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 738         .resource       = ep93xx_wdt_resources,
 739 };
 740
 741 /*************************************************************************
 742  * EP93xx IDE
 743  *************************************************************************/
 744 static struct resource ep93xx_ide_resources[] = {
 745         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 746         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 747 };
 748
 749 static struct platform_device ep93xx_ide_device = {
 750         .name           = "ep93xx-ide",
 751         .id             = -1,
 752         .dev            = {
 753                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 754                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 755         },
 756         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 757         .resource       = ep93xx_ide_resources,
 758 };
 759
 760 void __init ep93xx_register_ide(void)
 761 {
 762         platform_device_register(&ep93xx_ide_device);
 763 }
 764
 765 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 766 {
 767         int err;
 768         int i;
 769
 770         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 771         if (err)
 772                 return err;
 773         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 774         if (err)
 775                 goto fail_egpio15;
 776         for (i = 2; i < 8; i++) {
 777                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 778                 if (err)
 779                         goto fail_gpio_e;
 780         }
 781         for (i = 4; i < 8; i++) {
 782                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 783                 if (err)
 784                         goto fail_gpio_g;
 785         }
 786         for (i = 0; i < 8; i++) {
 787                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 788                 if (err)
 789                         goto fail_gpio_h;
 790         }
 791
 792         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 793         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 794                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 795                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 796         return 0;
 797
 798 fail_gpio_h:
 799         for (--i; i >= 0; --i)
 800                 gpio_free(EP93XX_GPIO_LINE_H(i));
 801         i = 8;
 802 fail_gpio_g:
 803         for (--i; i >= 4; --i)
 804                 gpio_free(EP93XX_GPIO_LINE_G(i));
 805         i = 8;
 806 fail_gpio_e:
 807         for (--i; i >= 2; --i)
 808                 gpio_free(EP93XX_GPIO_LINE_E(i));
 809         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 810 fail_egpio15:
 811         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 812         return err;
 813 }
 814 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 815
 816 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 817 {
 818         int i;
 819
 820         for (i = 2; i < 8; i++)
 821                 gpio_free(EP93XX_GPIO_LINE_E(i));
 822         for (i = 4; i < 8; i++)
 823                 gpio_free(EP93XX_GPIO_LINE_G(i));
 824         for (i = 0; i < 8; i++)
 825                 gpio_free(EP93XX_GPIO_LINE_H(i));
 826         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 827         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 828
 829
 830         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 831         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 832                                EP93XX_SYSCON_DEVCFG_GONIDE |
 833                                EP93XX_SYSCON_DEVCFG_HONIDE);
 834 }
 835 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 836
 837 /*************************************************************************
 838  * EP93xx ADC
 839  *************************************************************************/
 840 static struct resource ep93xx_adc_resources[] = {
 841         DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
 842         DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
 843 };
 844
 845 static struct platform_device ep93xx_adc_device = {
 846         .name           = "ep93xx-adc",
 847         .id             = -1,
 848         .num_resources  = ARRAY_SIZE(ep93xx_adc_resources),
 849         .resource       = ep93xx_adc_resources,
 850 };
 851
 852 void __init ep93xx_register_adc(void)
 853 {
 854         /* Power up ADC, deactivate Touch Screen Controller */
 855         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
 856                                 EP93XX_SYSCON_DEVCFG_ADCPD);
 857
 858         platform_device_register(&ep93xx_adc_device);
 859 }
 860
 861 /*************************************************************************
 862  * EP93xx Security peripheral
 863  *************************************************************************/
 864
 865 /*
 866  * The Maverick Key is 256 bits of micro fuses blown at the factory during
 867  * manufacturing to uniquely identify a part.
 868  *
 869  * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
 870  */
 871 #define EP93XX_SECURITY_REG(x)          (EP93XX_SECURITY_BASE + (x))
 872 #define EP93XX_SECURITY_SECFLG          EP93XX_SECURITY_REG(0x2400)
 873 #define EP93XX_SECURITY_FUSEFLG         EP93XX_SECURITY_REG(0x2410)
 874 #define EP93XX_SECURITY_UNIQID          EP93XX_SECURITY_REG(0x2440)
 875 #define EP93XX_SECURITY_UNIQCHK         EP93XX_SECURITY_REG(0x2450)
 876 #define EP93XX_SECURITY_UNIQVAL         EP93XX_SECURITY_REG(0x2460)
 877 #define EP93XX_SECURITY_SECID1          EP93XX_SECURITY_REG(0x2500)
 878 #define EP93XX_SECURITY_SECID2          EP93XX_SECURITY_REG(0x2504)
 879 #define EP93XX_SECURITY_SECCHK1         EP93XX_SECURITY_REG(0x2520)
 880 #define EP93XX_SECURITY_SECCHK2         EP93XX_SECURITY_REG(0x2524)
 881 #define EP93XX_SECURITY_UNIQID2         EP93XX_SECURITY_REG(0x2700)
 882 #define EP93XX_SECURITY_UNIQID3         EP93XX_SECURITY_REG(0x2704)
 883 #define EP93XX_SECURITY_UNIQID4         EP93XX_SECURITY_REG(0x2708)
 884 #define EP93XX_SECURITY_UNIQID5         EP93XX_SECURITY_REG(0x270c)
 885
 886 static char ep93xx_soc_id[33];
 887
 888 static const char __init *ep93xx_get_soc_id(void)
 889 {
 890         unsigned int id, id2, id3, id4, id5;
 891
 892         if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
 893                 return "bad Hamming code";
 894
 895         id = __raw_readl(EP93XX_SECURITY_UNIQID);
 896         id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
 897         id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
 898         id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
 899         id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
 900
 901         if (id != id2)
 902                 return "invalid";
 903
 904         /* Toss the unique ID into the entropy pool */
 905         add_device_randomness(&id2, 4);
 906         add_device_randomness(&id3, 4);
 907         add_device_randomness(&id4, 4);
 908         add_device_randomness(&id5, 4);
 909
 910         snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
 911                  "%08x%08x%08x%08x", id2, id3, id4, id5);
 912
 913         return ep93xx_soc_id;
 914 }
 915
 916 static const char __init *ep93xx_get_soc_rev(void)
 917 {
 918         int rev = ep93xx_chip_revision();
 919
 920         switch (rev) {
 921         case EP93XX_CHIP_REV_D0:
 922                 return "D0";
 923         case EP93XX_CHIP_REV_D1:
 924                 return "D1";
 925         case EP93XX_CHIP_REV_E0:
 926                 return "E0";
 927         case EP93XX_CHIP_REV_E1:
 928                 return "E1";
 929         case EP93XX_CHIP_REV_E2:
 930                 return "E2";
 931         default:
 932                 return "unknown";
 933         }
 934 }
 935
 936 static const char __init *ep93xx_get_machine_name(void)
 937 {
 938         return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
 939 }
 940
 941 static struct device __init *ep93xx_init_soc(void)
 942 {
 943         struct soc_device_attribute *soc_dev_attr;
 944         struct soc_device *soc_dev;
 945
 946         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 947         if (!soc_dev_attr)
 948                 return NULL;
 949
 950         soc_dev_attr->machine = ep93xx_get_machine_name();
 951         soc_dev_attr->family = "Cirrus Logic EP93xx";
 952         soc_dev_attr->revision = ep93xx_get_soc_rev();
 953         soc_dev_attr->soc_id = ep93xx_get_soc_id();
 954
 955         soc_dev = soc_device_register(soc_dev_attr);
 956         if (IS_ERR(soc_dev)) {
 957                 kfree(soc_dev_attr->machine);
 958                 kfree(soc_dev_attr);
 959                 return NULL;
 960         }
 961
 962         return soc_device_to_device(soc_dev);
 963 }
 964
 965 struct device __init *ep93xx_init_devices(void)
 966 {
 967         struct device *parent;
 968
 969         /* Disallow access to MaverickCrunch initially */
 970         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 971
 972         /* Default all ports to GPIO */
 973         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 974                                EP93XX_SYSCON_DEVCFG_GONK |
 975                                EP93XX_SYSCON_DEVCFG_EONIDE |
 976                                EP93XX_SYSCON_DEVCFG_GONIDE |
 977                                EP93XX_SYSCON_DEVCFG_HONIDE);
 978
 979         parent = ep93xx_init_soc();
 980
 981         /* Get the GPIO working early, other devices need it */
 982         platform_device_register(&ep93xx_gpio_device);
 983
 984         amba_device_register(&uart1_device, &iomem_resource);
 985         amba_device_register(&uart2_device, &iomem_resource);
 986         amba_device_register(&uart3_device, &iomem_resource);
 987
 988         platform_device_register(&ep93xx_rtc_device);
 989         platform_device_register(&ep93xx_ohci_device);
 990         platform_device_register(&ep93xx_wdt_device);
 991
 992         gpio_led_register_device(-1, &ep93xx_led_data);
 993
 994         return parent;
 995 }
 996
 997 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
 998 {
 999         /*
1000          * Set then clear the SWRST bit to initiate a software reset
1001          */
1002         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1003         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1004
1005         while (1)
1006                 ;
1007 }
1008
1009 void __init ep93xx_init_late(void)
1010 {
1011         crunch_init();
1012 }