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/uaccess.h>
  26 #include <linux/termios.h>
  27 #include <linux/amba/bus.h>
  28 #include <linux/amba/serial.h>
  29 #include <linux/mtd/physmap.h>
  30 #include <linux/i2c.h>
  31 #include <linux/gpio/machine.h>
  32 #include <linux/spi/spi.h>
  33 #include <linux/export.h>
  34 #include <linux/irqchip/arm-vic.h>
  35 #include <linux/reboot.h>
  36 #include <linux/usb/ohci_pdriver.h>
  37 #include <linux/random.h>
  38
  39 #include "hardware.h"
  40 #include <linux/platform_data/video-ep93xx.h>
  41 #include <linux/platform_data/keypad-ep93xx.h>
  42 #include <linux/platform_data/spi-ep93xx.h>
  43 #include <linux/soc/cirrus/ep93xx.h>
  44
  45 #include "gpio-ep93xx.h"
  46
  47 #include <asm/mach/arch.h>
  48 #include <asm/mach/map.h>
  49
  50 #include "soc.h"
  51 #include "irqs.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, IRQ_EP93XX_VIC0, EP93XX_VIC1_VALID_IRQ_MASK, 0);
  81         vic_init(EP93XX_VIC2_BASE, IRQ_EP93XX_VIC1, 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 "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_prepare_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
 346 static struct platform_device ep93xx_i2c_device = {
 347         .name           = "i2c-gpio",
 348         .id             = 0,
 349         .dev            = {
 350                 .platform_data  = NULL,
 351         },
 352 };
 353
 354 /**
 355  * ep93xx_register_i2c - Register the i2c platform device.
 356  * @devices:    platform specific i2c bus device information (__initdata)
 357  * @num:        the number of devices on the i2c bus
 358  */
 359 void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
 360 {
 361         /*
 362          * FIXME: this just sets the two pins as non-opendrain, as no
 363          * platforms tries to do that anyway. Flag the applicable lines
 364          * as open drain in the GPIO_LOOKUP above and the driver or
 365          * gpiolib will handle open drain/open drain emulation as need
 366          * be. Right now i2c-gpio emulates open drain which is not
 367          * optimal.
 368          */
 369         __raw_writel((0 << 1) | (0 << 0),
 370                      EP93XX_GPIO_EEDRIVE);
 371
 372         i2c_register_board_info(0, devices, num);
 373         gpiod_add_lookup_table(&ep93xx_i2c_gpiod_table);
 374         platform_device_register(&ep93xx_i2c_device);
 375 }
 376
 377 /*************************************************************************
 378  * EP93xx SPI peripheral handling
 379  *************************************************************************/
 380 static struct ep93xx_spi_info ep93xx_spi_master_data;
 381
 382 static struct resource ep93xx_spi_resources[] = {
 383         DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18),
 384         DEFINE_RES_IRQ(IRQ_EP93XX_SSP),
 385 };
 386
 387 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32);
 388
 389 static struct platform_device ep93xx_spi_device = {
 390         .name           = "ep93xx-spi",
 391         .id             = 0,
 392         .dev            = {
 393                 .platform_data          = &ep93xx_spi_master_data,
 394                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 395                 .dma_mask               = &ep93xx_spi_dma_mask,
 396         },
 397         .num_resources  = ARRAY_SIZE(ep93xx_spi_resources),
 398         .resource       = ep93xx_spi_resources,
 399 };
 400
 401 /**
 402  * ep93xx_register_spi() - registers spi platform device
 403  * @info: ep93xx board specific spi master info (__initdata)
 404  * @devices: SPI devices to register (__initdata)
 405  * @num: number of SPI devices to register
 406  *
 407  * This function registers platform device for the EP93xx SPI controller and
 408  * also makes sure that SPI pins are muxed so that I2S is not using those pins.
 409  */
 410 void __init ep93xx_register_spi(struct ep93xx_spi_info *info,
 411                                 struct spi_board_info *devices, int num)
 412 {
 413         /*
 414          * When SPI is used, we need to make sure that I2S is muxed off from
 415          * SPI pins.
 416          */
 417         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP);
 418
 419         ep93xx_spi_master_data = *info;
 420         spi_register_board_info(devices, num);
 421         platform_device_register(&ep93xx_spi_device);
 422 }
 423
 424 /*************************************************************************
 425  * EP93xx LEDs
 426  *************************************************************************/
 427 static const struct gpio_led ep93xx_led_pins[] __initconst = {
 428         {
 429                 .name   = "platform:grled",
 430         }, {
 431                 .name   = "platform: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 static struct gpiod_lookup_table ep93xx_leds_gpio_table = {
 441         .dev_id = "leds-gpio",
 442         .table = {
 443                 /* Use local offsets on gpiochip/port "E" */
 444                 GPIO_LOOKUP_IDX("E", 0, NULL, 0, GPIO_ACTIVE_HIGH),
 445                 GPIO_LOOKUP_IDX("E", 1, NULL, 1, GPIO_ACTIVE_HIGH),
 446                 { }
 447         },
 448 };
 449
 450 /*************************************************************************
 451  * EP93xx pwm peripheral handling
 452  *************************************************************************/
 453 static struct resource ep93xx_pwm0_resource[] = {
 454         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10),
 455 };
 456
 457 static struct platform_device ep93xx_pwm0_device = {
 458         .name           = "ep93xx-pwm",
 459         .id             = 0,
 460         .num_resources  = ARRAY_SIZE(ep93xx_pwm0_resource),
 461         .resource       = ep93xx_pwm0_resource,
 462 };
 463
 464 static struct resource ep93xx_pwm1_resource[] = {
 465         DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10),
 466 };
 467
 468 static struct platform_device ep93xx_pwm1_device = {
 469         .name           = "ep93xx-pwm",
 470         .id             = 1,
 471         .num_resources  = ARRAY_SIZE(ep93xx_pwm1_resource),
 472         .resource       = ep93xx_pwm1_resource,
 473 };
 474
 475 void __init ep93xx_register_pwm(int pwm0, int pwm1)
 476 {
 477         if (pwm0)
 478                 platform_device_register(&ep93xx_pwm0_device);
 479
 480         /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */
 481         if (pwm1)
 482                 platform_device_register(&ep93xx_pwm1_device);
 483 }
 484
 485 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev)
 486 {
 487         int err;
 488
 489         if (pdev->id == 0) {
 490                 err = 0;
 491         } else if (pdev->id == 1) {
 492                 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14,
 493                                    dev_name(&pdev->dev));
 494                 if (err)
 495                         return err;
 496                 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0);
 497                 if (err)
 498                         goto fail;
 499
 500                 /* PWM 1 output on EGPIO[14] */
 501                 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG);
 502         } else {
 503                 err = -ENODEV;
 504         }
 505
 506         return err;
 507
 508 fail:
 509         gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 510         return err;
 511 }
 512 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio);
 513
 514 void ep93xx_pwm_release_gpio(struct platform_device *pdev)
 515 {
 516         if (pdev->id == 1) {
 517                 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14);
 518                 gpio_free(EP93XX_GPIO_LINE_EGPIO14);
 519
 520                 /* EGPIO[14] used for GPIO */
 521                 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG);
 522         }
 523 }
 524 EXPORT_SYMBOL(ep93xx_pwm_release_gpio);
 525
 526
 527 /*************************************************************************
 528  * EP93xx video peripheral handling
 529  *************************************************************************/
 530 static struct ep93xxfb_mach_info ep93xxfb_data;
 531
 532 static struct resource ep93xx_fb_resource[] = {
 533         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800),
 534 };
 535
 536 static struct platform_device ep93xx_fb_device = {
 537         .name                   = "ep93xx-fb",
 538         .id                     = -1,
 539         .dev                    = {
 540                 .platform_data          = &ep93xxfb_data,
 541                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 542                 .dma_mask               = &ep93xx_fb_device.dev.coherent_dma_mask,
 543         },
 544         .num_resources          = ARRAY_SIZE(ep93xx_fb_resource),
 545         .resource               = ep93xx_fb_resource,
 546 };
 547
 548 /* The backlight use a single register in the framebuffer's register space */
 549 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20
 550
 551 static struct resource ep93xx_bl_resources[] = {
 552         DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE +
 553                        EP93XX_RASTER_REG_BRIGHTNESS, 0x04),
 554 };
 555
 556 static struct platform_device ep93xx_bl_device = {
 557         .name           = "ep93xx-bl",
 558         .id             = -1,
 559         .num_resources  = ARRAY_SIZE(ep93xx_bl_resources),
 560         .resource       = ep93xx_bl_resources,
 561 };
 562
 563 /**
 564  * ep93xx_register_fb - Register the framebuffer platform device.
 565  * @data:       platform specific framebuffer configuration (__initdata)
 566  */
 567 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 568 {
 569         ep93xxfb_data = *data;
 570         platform_device_register(&ep93xx_fb_device);
 571         platform_device_register(&ep93xx_bl_device);
 572 }
 573
 574
 575 /*************************************************************************
 576  * EP93xx matrix keypad peripheral handling
 577  *************************************************************************/
 578 static struct ep93xx_keypad_platform_data ep93xx_keypad_data;
 579
 580 static struct resource ep93xx_keypad_resource[] = {
 581         DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c),
 582         DEFINE_RES_IRQ(IRQ_EP93XX_KEY),
 583 };
 584
 585 static struct platform_device ep93xx_keypad_device = {
 586         .name           = "ep93xx-keypad",
 587         .id             = -1,
 588         .dev            = {
 589                 .platform_data  = &ep93xx_keypad_data,
 590         },
 591         .num_resources  = ARRAY_SIZE(ep93xx_keypad_resource),
 592         .resource       = ep93xx_keypad_resource,
 593 };
 594
 595 /**
 596  * ep93xx_register_keypad - Register the keypad platform device.
 597  * @data:       platform specific keypad configuration (__initdata)
 598  */
 599 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
 600 {
 601         ep93xx_keypad_data = *data;
 602         platform_device_register(&ep93xx_keypad_device);
 603 }
 604
 605 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
 606 {
 607         int err;
 608         int i;
 609
 610         for (i = 0; i < 8; i++) {
 611                 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
 612                 if (err)
 613                         goto fail_gpio_c;
 614                 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
 615                 if (err)
 616                         goto fail_gpio_d;
 617         }
 618
 619         /* Enable the keypad controller; GPIO ports C and D used for keypad */
 620         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 621                                  EP93XX_SYSCON_DEVCFG_GONK);
 622
 623         return 0;
 624
 625 fail_gpio_d:
 626         gpio_free(EP93XX_GPIO_LINE_C(i));
 627 fail_gpio_c:
 628         for (--i; i >= 0; --i) {
 629                 gpio_free(EP93XX_GPIO_LINE_C(i));
 630                 gpio_free(EP93XX_GPIO_LINE_D(i));
 631         }
 632         return err;
 633 }
 634 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
 635
 636 void ep93xx_keypad_release_gpio(struct platform_device *pdev)
 637 {
 638         int i;
 639
 640         for (i = 0; i < 8; i++) {
 641                 gpio_free(EP93XX_GPIO_LINE_C(i));
 642                 gpio_free(EP93XX_GPIO_LINE_D(i));
 643         }
 644
 645         /* Disable the keypad controller; GPIO ports C and D used for GPIO */
 646         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 647                                EP93XX_SYSCON_DEVCFG_GONK);
 648 }
 649 EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
 650
 651 /*************************************************************************
 652  * EP93xx I2S audio peripheral handling
 653  *************************************************************************/
 654 static struct resource ep93xx_i2s_resource[] = {
 655         DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100),
 656         DEFINE_RES_IRQ(IRQ_EP93XX_SAI),
 657 };
 658
 659 static struct platform_device ep93xx_i2s_device = {
 660         .name           = "ep93xx-i2s",
 661         .id             = -1,
 662         .num_resources  = ARRAY_SIZE(ep93xx_i2s_resource),
 663         .resource       = ep93xx_i2s_resource,
 664 };
 665
 666 static struct platform_device ep93xx_pcm_device = {
 667         .name           = "ep93xx-pcm-audio",
 668         .id             = -1,
 669 };
 670
 671 void __init ep93xx_register_i2s(void)
 672 {
 673         platform_device_register(&ep93xx_i2s_device);
 674         platform_device_register(&ep93xx_pcm_device);
 675 }
 676
 677 #define EP93XX_SYSCON_DEVCFG_I2S_MASK   (EP93XX_SYSCON_DEVCFG_I2SONSSP | \
 678                                          EP93XX_SYSCON_DEVCFG_I2SONAC97)
 679
 680 #define EP93XX_I2SCLKDIV_MASK           (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \
 681                                          EP93XX_SYSCON_I2SCLKDIV_SPOL)
 682
 683 int ep93xx_i2s_acquire(void)
 684 {
 685         unsigned val;
 686
 687         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97,
 688                         EP93XX_SYSCON_DEVCFG_I2S_MASK);
 689
 690         /*
 691          * This is potentially racy with the clock api for i2s_mclk, sclk and
 692          * lrclk. Since the i2s driver is the only user of those clocks we
 693          * rely on it to prevent parallel use of this function and the
 694          * clock api for the i2s clocks.
 695          */
 696         val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV);
 697         val &= ~EP93XX_I2SCLKDIV_MASK;
 698         val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL;
 699         ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV);
 700
 701         return 0;
 702 }
 703 EXPORT_SYMBOL(ep93xx_i2s_acquire);
 704
 705 void ep93xx_i2s_release(void)
 706 {
 707         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK);
 708 }
 709 EXPORT_SYMBOL(ep93xx_i2s_release);
 710
 711 /*************************************************************************
 712  * EP93xx AC97 audio peripheral handling
 713  *************************************************************************/
 714 static struct resource ep93xx_ac97_resources[] = {
 715         DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac),
 716         DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR),
 717 };
 718
 719 static struct platform_device ep93xx_ac97_device = {
 720         .name           = "ep93xx-ac97",
 721         .id             = -1,
 722         .num_resources  = ARRAY_SIZE(ep93xx_ac97_resources),
 723         .resource       = ep93xx_ac97_resources,
 724 };
 725
 726 void __init ep93xx_register_ac97(void)
 727 {
 728         /*
 729          * Make sure that the AC97 pins are not used by I2S.
 730          */
 731         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97);
 732
 733         platform_device_register(&ep93xx_ac97_device);
 734         platform_device_register(&ep93xx_pcm_device);
 735 }
 736
 737 /*************************************************************************
 738  * EP93xx Watchdog
 739  *************************************************************************/
 740 static struct resource ep93xx_wdt_resources[] = {
 741         DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08),
 742 };
 743
 744 static struct platform_device ep93xx_wdt_device = {
 745         .name           = "ep93xx-wdt",
 746         .id             = -1,
 747         .num_resources  = ARRAY_SIZE(ep93xx_wdt_resources),
 748         .resource       = ep93xx_wdt_resources,
 749 };
 750
 751 /*************************************************************************
 752  * EP93xx IDE
 753  *************************************************************************/
 754 static struct resource ep93xx_ide_resources[] = {
 755         DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
 756         DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
 757 };
 758
 759 static struct platform_device ep93xx_ide_device = {
 760         .name           = "ep93xx-ide",
 761         .id             = -1,
 762         .dev            = {
 763                 .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
 764                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 765         },
 766         .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
 767         .resource       = ep93xx_ide_resources,
 768 };
 769
 770 void __init ep93xx_register_ide(void)
 771 {
 772         platform_device_register(&ep93xx_ide_device);
 773 }
 774
 775 int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
 776 {
 777         int err;
 778         int i;
 779
 780         err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
 781         if (err)
 782                 return err;
 783         err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
 784         if (err)
 785                 goto fail_egpio15;
 786         for (i = 2; i < 8; i++) {
 787                 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
 788                 if (err)
 789                         goto fail_gpio_e;
 790         }
 791         for (i = 4; i < 8; i++) {
 792                 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
 793                 if (err)
 794                         goto fail_gpio_g;
 795         }
 796         for (i = 0; i < 8; i++) {
 797                 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
 798                 if (err)
 799                         goto fail_gpio_h;
 800         }
 801
 802         /* GPIO ports E[7:2], G[7:4] and H used by IDE */
 803         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 804                                  EP93XX_SYSCON_DEVCFG_GONIDE |
 805                                  EP93XX_SYSCON_DEVCFG_HONIDE);
 806         return 0;
 807
 808 fail_gpio_h:
 809         for (--i; i >= 0; --i)
 810                 gpio_free(EP93XX_GPIO_LINE_H(i));
 811         i = 8;
 812 fail_gpio_g:
 813         for (--i; i >= 4; --i)
 814                 gpio_free(EP93XX_GPIO_LINE_G(i));
 815         i = 8;
 816 fail_gpio_e:
 817         for (--i; i >= 2; --i)
 818                 gpio_free(EP93XX_GPIO_LINE_E(i));
 819         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 820 fail_egpio15:
 821         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 822         return err;
 823 }
 824 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
 825
 826 void ep93xx_ide_release_gpio(struct platform_device *pdev)
 827 {
 828         int i;
 829
 830         for (i = 2; i < 8; i++)
 831                 gpio_free(EP93XX_GPIO_LINE_E(i));
 832         for (i = 4; i < 8; i++)
 833                 gpio_free(EP93XX_GPIO_LINE_G(i));
 834         for (i = 0; i < 8; i++)
 835                 gpio_free(EP93XX_GPIO_LINE_H(i));
 836         gpio_free(EP93XX_GPIO_LINE_EGPIO15);
 837         gpio_free(EP93XX_GPIO_LINE_EGPIO2);
 838
 839
 840         /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
 841         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
 842                                EP93XX_SYSCON_DEVCFG_GONIDE |
 843                                EP93XX_SYSCON_DEVCFG_HONIDE);
 844 }
 845 EXPORT_SYMBOL(ep93xx_ide_release_gpio);
 846
 847 /*************************************************************************
 848  * EP93xx ADC
 849  *************************************************************************/
 850 static struct resource ep93xx_adc_resources[] = {
 851         DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
 852         DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
 853 };
 854
 855 static struct platform_device ep93xx_adc_device = {
 856         .name           = "ep93xx-adc",
 857         .id             = -1,
 858         .num_resources  = ARRAY_SIZE(ep93xx_adc_resources),
 859         .resource       = ep93xx_adc_resources,
 860 };
 861
 862 void __init ep93xx_register_adc(void)
 863 {
 864         /* Power up ADC, deactivate Touch Screen Controller */
 865         ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
 866                                 EP93XX_SYSCON_DEVCFG_ADCPD);
 867
 868         platform_device_register(&ep93xx_adc_device);
 869 }
 870
 871 /*************************************************************************
 872  * EP93xx Security peripheral
 873  *************************************************************************/
 874
 875 /*
 876  * The Maverick Key is 256 bits of micro fuses blown at the factory during
 877  * manufacturing to uniquely identify a part.
 878  *
 879  * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key
 880  */
 881 #define EP93XX_SECURITY_REG(x)          (EP93XX_SECURITY_BASE + (x))
 882 #define EP93XX_SECURITY_SECFLG          EP93XX_SECURITY_REG(0x2400)
 883 #define EP93XX_SECURITY_FUSEFLG         EP93XX_SECURITY_REG(0x2410)
 884 #define EP93XX_SECURITY_UNIQID          EP93XX_SECURITY_REG(0x2440)
 885 #define EP93XX_SECURITY_UNIQCHK         EP93XX_SECURITY_REG(0x2450)
 886 #define EP93XX_SECURITY_UNIQVAL         EP93XX_SECURITY_REG(0x2460)
 887 #define EP93XX_SECURITY_SECID1          EP93XX_SECURITY_REG(0x2500)
 888 #define EP93XX_SECURITY_SECID2          EP93XX_SECURITY_REG(0x2504)
 889 #define EP93XX_SECURITY_SECCHK1         EP93XX_SECURITY_REG(0x2520)
 890 #define EP93XX_SECURITY_SECCHK2         EP93XX_SECURITY_REG(0x2524)
 891 #define EP93XX_SECURITY_UNIQID2         EP93XX_SECURITY_REG(0x2700)
 892 #define EP93XX_SECURITY_UNIQID3         EP93XX_SECURITY_REG(0x2704)
 893 #define EP93XX_SECURITY_UNIQID4         EP93XX_SECURITY_REG(0x2708)
 894 #define EP93XX_SECURITY_UNIQID5         EP93XX_SECURITY_REG(0x270c)
 895
 896 static char ep93xx_soc_id[33];
 897
 898 static const char __init *ep93xx_get_soc_id(void)
 899 {
 900         unsigned int id, id2, id3, id4, id5;
 901
 902         if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1)
 903                 return "bad Hamming code";
 904
 905         id = __raw_readl(EP93XX_SECURITY_UNIQID);
 906         id2 = __raw_readl(EP93XX_SECURITY_UNIQID2);
 907         id3 = __raw_readl(EP93XX_SECURITY_UNIQID3);
 908         id4 = __raw_readl(EP93XX_SECURITY_UNIQID4);
 909         id5 = __raw_readl(EP93XX_SECURITY_UNIQID5);
 910
 911         if (id != id2)
 912                 return "invalid";
 913
 914         /* Toss the unique ID into the entropy pool */
 915         add_device_randomness(&id2, 4);
 916         add_device_randomness(&id3, 4);
 917         add_device_randomness(&id4, 4);
 918         add_device_randomness(&id5, 4);
 919
 920         snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
 921                  "%08x%08x%08x%08x", id2, id3, id4, id5);
 922
 923         return ep93xx_soc_id;
 924 }
 925
 926 static const char __init *ep93xx_get_soc_rev(void)
 927 {
 928         int rev = ep93xx_chip_revision();
 929
 930         switch (rev) {
 931         case EP93XX_CHIP_REV_D0:
 932                 return "D0";
 933         case EP93XX_CHIP_REV_D1:
 934                 return "D1";
 935         case EP93XX_CHIP_REV_E0:
 936                 return "E0";
 937         case EP93XX_CHIP_REV_E1:
 938                 return "E1";
 939         case EP93XX_CHIP_REV_E2:
 940                 return "E2";
 941         default:
 942                 return "unknown";
 943         }
 944 }
 945
 946 static const char __init *ep93xx_get_machine_name(void)
 947 {
 948         return kasprintf(GFP_KERNEL,"%s", machine_desc->name);
 949 }
 950
 951 static struct device __init *ep93xx_init_soc(void)
 952 {
 953         struct soc_device_attribute *soc_dev_attr;
 954         struct soc_device *soc_dev;
 955
 956         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 957         if (!soc_dev_attr)
 958                 return NULL;
 959
 960         soc_dev_attr->machine = ep93xx_get_machine_name();
 961         soc_dev_attr->family = "Cirrus Logic EP93xx";
 962         soc_dev_attr->revision = ep93xx_get_soc_rev();
 963         soc_dev_attr->soc_id = ep93xx_get_soc_id();
 964
 965         soc_dev = soc_device_register(soc_dev_attr);
 966         if (IS_ERR(soc_dev)) {
 967                 kfree(soc_dev_attr->machine);
 968                 kfree(soc_dev_attr);
 969                 return NULL;
 970         }
 971
 972         return soc_device_to_device(soc_dev);
 973 }
 974
 975 struct device __init *ep93xx_init_devices(void)
 976 {
 977         struct device *parent;
 978
 979         /* Disallow access to MaverickCrunch initially */
 980         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA);
 981
 982         /* Default all ports to GPIO */
 983         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
 984                                EP93XX_SYSCON_DEVCFG_GONK |
 985                                EP93XX_SYSCON_DEVCFG_EONIDE |
 986                                EP93XX_SYSCON_DEVCFG_GONIDE |
 987                                EP93XX_SYSCON_DEVCFG_HONIDE);
 988
 989         parent = ep93xx_init_soc();
 990
 991         /* Get the GPIO working early, other devices need it */
 992         platform_device_register(&ep93xx_gpio_device);
 993
 994         amba_device_register(&uart1_device, &iomem_resource);
 995         amba_device_register(&uart2_device, &iomem_resource);
 996         amba_device_register(&uart3_device, &iomem_resource);
 997
 998         platform_device_register(&ep93xx_rtc_device);
 999         platform_device_register(&ep93xx_ohci_device);
1000         platform_device_register(&ep93xx_wdt_device);
1001
1002         gpiod_add_lookup_table(&ep93xx_leds_gpio_table);
1003         gpio_led_register_device(-1, &ep93xx_led_data);
1004
1005         return parent;
1006 }
1007
1008 void ep93xx_restart(enum reboot_mode mode, const char *cmd)
1009 {
1010         /*
1011          * Set then clear the SWRST bit to initiate a software reset
1012          */
1013         ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1014         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST);
1015
1016         while (1)
1017                 ;
1018 }