1 /* 2 * arch/arm/mach-ep93xx/core.c 3 * Core routines for Cirrus EP93xx chips. 4 * 5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> 6 * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org> 7 * 8 * Thanks go to Michael Burian and Ray Lehtiniemi for their key 9 * role in the ep93xx linux community. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or (at 14 * your option) any later version. 15 */ 16 17 #define pr_fmt(fmt) "ep93xx " KBUILD_MODNAME ": " fmt 18 19 #include <linux/kernel.h> 20 #include <linux/init.h> 21 #include <linux/platform_device.h> 22 #include <linux/interrupt.h> 23 #include <linux/dma-mapping.h> 24 #include <linux/sys_soc.h> 25 #include <linux/irq.h> 26 #include <linux/io.h> 27 #include <linux/gpio.h> 28 #include <linux/leds.h> 29 #include <linux/termios.h> 30 #include <linux/amba/bus.h> 31 #include <linux/amba/serial.h> 32 #include <linux/mtd/physmap.h> 33 #include <linux/i2c.h> 34 #include <linux/i2c-gpio.h> 35 #include <linux/spi/spi.h> 36 #include <linux/export.h> 37 #include <linux/irqchip/arm-vic.h> 38 #include <linux/reboot.h> 39 #include <linux/usb/ohci_pdriver.h> 40 #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 ep93xx_map_io(void)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 *************************************************************************/ ep93xx_init_irq(void)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 ep93xx_syscon_swlocked_write(unsigned int val,void __iomem * reg)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 ep93xx_devcfg_set_clear(unsigned int set_bits,unsigned int clear_bits)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 */ ep93xx_chip_revision(void)128 unsigned int ep93xx_chip_revision(void) 129 { 130 unsigned int v; 131 132 v = __raw_readl(EP93XX_SYSCON_SYSCFG); 133 v &= EP93XX_SYSCON_SYSCFG_REV_MASK; 134 v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT; 135 return v; 136 } 137 EXPORT_SYMBOL_GPL(ep93xx_chip_revision); 138 139 /************************************************************************* 140 * EP93xx GPIO 141 *************************************************************************/ 142 static struct resource ep93xx_gpio_resource[] = { 143 DEFINE_RES_MEM(EP93XX_GPIO_PHYS_BASE, 0xcc), 144 }; 145 146 static struct platform_device ep93xx_gpio_device = { 147 .name = "gpio-ep93xx", 148 .id = -1, 149 .num_resources = ARRAY_SIZE(ep93xx_gpio_resource), 150 .resource = ep93xx_gpio_resource, 151 }; 152 153 /************************************************************************* 154 * EP93xx peripheral handling 155 *************************************************************************/ 156 #define EP93XX_UART_MCR_OFFSET (0x0100) 157 ep93xx_uart_set_mctrl(struct amba_device * dev,void __iomem * base,unsigned int mctrl)158 static void ep93xx_uart_set_mctrl(struct amba_device *dev, 159 void __iomem *base, unsigned int mctrl) 160 { 161 unsigned int mcr; 162 163 mcr = 0; 164 if (mctrl & TIOCM_RTS) 165 mcr |= 2; 166 if (mctrl & TIOCM_DTR) 167 mcr |= 1; 168 169 __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET); 170 } 171 172 static struct amba_pl010_data ep93xx_uart_data = { 173 .set_mctrl = ep93xx_uart_set_mctrl, 174 }; 175 176 static AMBA_APB_DEVICE(uart1, "apb:uart1", 0x00041010, EP93XX_UART1_PHYS_BASE, 177 { IRQ_EP93XX_UART1 }, &ep93xx_uart_data); 178 179 static AMBA_APB_DEVICE(uart2, "apb:uart2", 0x00041010, EP93XX_UART2_PHYS_BASE, 180 { IRQ_EP93XX_UART2 }, NULL); 181 182 static AMBA_APB_DEVICE(uart3, "apb:uart3", 0x00041010, EP93XX_UART3_PHYS_BASE, 183 { IRQ_EP93XX_UART3 }, &ep93xx_uart_data); 184 185 static struct resource ep93xx_rtc_resource[] = { 186 DEFINE_RES_MEM(EP93XX_RTC_PHYS_BASE, 0x10c), 187 }; 188 189 static struct platform_device ep93xx_rtc_device = { 190 .name = "ep93xx-rtc", 191 .id = -1, 192 .num_resources = ARRAY_SIZE(ep93xx_rtc_resource), 193 .resource = ep93xx_rtc_resource, 194 }; 195 196 /************************************************************************* 197 * EP93xx OHCI USB Host 198 *************************************************************************/ 199 200 static struct clk *ep93xx_ohci_host_clock; 201 ep93xx_ohci_power_on(struct platform_device * pdev)202 static int ep93xx_ohci_power_on(struct platform_device *pdev) 203 { 204 if (!ep93xx_ohci_host_clock) { 205 ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL); 206 if (IS_ERR(ep93xx_ohci_host_clock)) 207 return PTR_ERR(ep93xx_ohci_host_clock); 208 } 209 210 return clk_enable(ep93xx_ohci_host_clock); 211 } 212 ep93xx_ohci_power_off(struct platform_device * pdev)213 static void ep93xx_ohci_power_off(struct platform_device *pdev) 214 { 215 clk_disable(ep93xx_ohci_host_clock); 216 } 217 218 static struct usb_ohci_pdata ep93xx_ohci_pdata = { 219 .power_on = ep93xx_ohci_power_on, 220 .power_off = ep93xx_ohci_power_off, 221 .power_suspend = ep93xx_ohci_power_off, 222 }; 223 224 static struct resource ep93xx_ohci_resources[] = { 225 DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000), 226 DEFINE_RES_IRQ(IRQ_EP93XX_USB), 227 }; 228 229 static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32); 230 231 static struct platform_device ep93xx_ohci_device = { 232 .name = "ohci-platform", 233 .id = -1, 234 .num_resources = ARRAY_SIZE(ep93xx_ohci_resources), 235 .resource = ep93xx_ohci_resources, 236 .dev = { 237 .dma_mask = &ep93xx_ohci_dma_mask, 238 .coherent_dma_mask = DMA_BIT_MASK(32), 239 .platform_data = &ep93xx_ohci_pdata, 240 }, 241 }; 242 243 /************************************************************************* 244 * EP93xx physmap'ed flash 245 *************************************************************************/ 246 static struct physmap_flash_data ep93xx_flash_data; 247 248 static struct resource ep93xx_flash_resource = { 249 .flags = IORESOURCE_MEM, 250 }; 251 252 static struct platform_device ep93xx_flash = { 253 .name = "physmap-flash", 254 .id = 0, 255 .dev = { 256 .platform_data = &ep93xx_flash_data, 257 }, 258 .num_resources = 1, 259 .resource = &ep93xx_flash_resource, 260 }; 261 262 /** 263 * ep93xx_register_flash() - Register the external flash device. 264 * @width: bank width in octets 265 * @start: resource start address 266 * @size: resource size 267 */ ep93xx_register_flash(unsigned int width,resource_size_t start,resource_size_t size)268 void __init ep93xx_register_flash(unsigned int width, 269 resource_size_t start, resource_size_t size) 270 { 271 ep93xx_flash_data.width = width; 272 273 ep93xx_flash_resource.start = start; 274 ep93xx_flash_resource.end = start + size - 1; 275 276 platform_device_register(&ep93xx_flash); 277 } 278 279 280 /************************************************************************* 281 * EP93xx ethernet peripheral handling 282 *************************************************************************/ 283 static struct ep93xx_eth_data ep93xx_eth_data; 284 285 static struct resource ep93xx_eth_resource[] = { 286 DEFINE_RES_MEM(EP93XX_ETHERNET_PHYS_BASE, 0x10000), 287 DEFINE_RES_IRQ(IRQ_EP93XX_ETHERNET), 288 }; 289 290 static u64 ep93xx_eth_dma_mask = DMA_BIT_MASK(32); 291 292 static struct platform_device ep93xx_eth_device = { 293 .name = "ep93xx-eth", 294 .id = -1, 295 .dev = { 296 .platform_data = &ep93xx_eth_data, 297 .coherent_dma_mask = DMA_BIT_MASK(32), 298 .dma_mask = &ep93xx_eth_dma_mask, 299 }, 300 .num_resources = ARRAY_SIZE(ep93xx_eth_resource), 301 .resource = ep93xx_eth_resource, 302 }; 303 304 /** 305 * ep93xx_register_eth - Register the built-in ethernet platform device. 306 * @data: platform specific ethernet configuration (__initdata) 307 * @copy_addr: flag indicating that the MAC address should be copied 308 * from the IndAd registers (as programmed by the bootloader) 309 */ ep93xx_register_eth(struct ep93xx_eth_data * data,int copy_addr)310 void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr) 311 { 312 if (copy_addr) 313 memcpy_fromio(data->dev_addr, EP93XX_ETHERNET_BASE + 0x50, 6); 314 315 ep93xx_eth_data = *data; 316 platform_device_register(&ep93xx_eth_device); 317 } 318 319 320 /************************************************************************* 321 * EP93xx i2c peripheral handling 322 *************************************************************************/ 323 static struct i2c_gpio_platform_data ep93xx_i2c_data; 324 325 static struct platform_device ep93xx_i2c_device = { 326 .name = "i2c-gpio", 327 .id = 0, 328 .dev = { 329 .platform_data = &ep93xx_i2c_data, 330 }, 331 }; 332 333 /** 334 * ep93xx_register_i2c - Register the i2c platform device. 335 * @data: platform specific i2c-gpio configuration (__initdata) 336 * @devices: platform specific i2c bus device information (__initdata) 337 * @num: the number of devices on the i2c bus 338 */ ep93xx_register_i2c(struct i2c_gpio_platform_data * data,struct i2c_board_info * devices,int num)339 void __init ep93xx_register_i2c(struct i2c_gpio_platform_data *data, 340 struct i2c_board_info *devices, int num) 341 { 342 /* 343 * Set the EEPROM interface pin drive type control. 344 * Defines the driver type for the EECLK and EEDAT pins as either 345 * open drain, which will require an external pull-up, or a normal 346 * CMOS driver. 347 */ 348 if (data->sda_is_open_drain && data->sda_pin != EP93XX_GPIO_LINE_EEDAT) 349 pr_warning("sda != EEDAT, open drain has no effect\n"); 350 if (data->scl_is_open_drain && data->scl_pin != EP93XX_GPIO_LINE_EECLK) 351 pr_warning("scl != EECLK, open drain has no effect\n"); 352 353 __raw_writel((data->sda_is_open_drain << 1) | 354 (data->scl_is_open_drain << 0), 355 EP93XX_GPIO_EEDRIVE); 356 357 ep93xx_i2c_data = *data; 358 i2c_register_board_info(0, devices, num); 359 platform_device_register(&ep93xx_i2c_device); 360 } 361 362 /************************************************************************* 363 * EP93xx SPI peripheral handling 364 *************************************************************************/ 365 static struct ep93xx_spi_info ep93xx_spi_master_data; 366 367 static struct resource ep93xx_spi_resources[] = { 368 DEFINE_RES_MEM(EP93XX_SPI_PHYS_BASE, 0x18), 369 DEFINE_RES_IRQ(IRQ_EP93XX_SSP), 370 }; 371 372 static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32); 373 374 static struct platform_device ep93xx_spi_device = { 375 .name = "ep93xx-spi", 376 .id = 0, 377 .dev = { 378 .platform_data = &ep93xx_spi_master_data, 379 .coherent_dma_mask = DMA_BIT_MASK(32), 380 .dma_mask = &ep93xx_spi_dma_mask, 381 }, 382 .num_resources = ARRAY_SIZE(ep93xx_spi_resources), 383 .resource = ep93xx_spi_resources, 384 }; 385 386 /** 387 * ep93xx_register_spi() - registers spi platform device 388 * @info: ep93xx board specific spi master info (__initdata) 389 * @devices: SPI devices to register (__initdata) 390 * @num: number of SPI devices to register 391 * 392 * This function registers platform device for the EP93xx SPI controller and 393 * also makes sure that SPI pins are muxed so that I2S is not using those pins. 394 */ ep93xx_register_spi(struct ep93xx_spi_info * info,struct spi_board_info * devices,int num)395 void __init ep93xx_register_spi(struct ep93xx_spi_info *info, 396 struct spi_board_info *devices, int num) 397 { 398 /* 399 * When SPI is used, we need to make sure that I2S is muxed off from 400 * SPI pins. 401 */ 402 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONSSP); 403 404 ep93xx_spi_master_data = *info; 405 spi_register_board_info(devices, num); 406 platform_device_register(&ep93xx_spi_device); 407 } 408 409 /************************************************************************* 410 * EP93xx LEDs 411 *************************************************************************/ 412 static const struct gpio_led ep93xx_led_pins[] __initconst = { 413 { 414 .name = "platform:grled", 415 .gpio = EP93XX_GPIO_LINE_GRLED, 416 }, { 417 .name = "platform:rdled", 418 .gpio = EP93XX_GPIO_LINE_RDLED, 419 }, 420 }; 421 422 static const struct gpio_led_platform_data ep93xx_led_data __initconst = { 423 .num_leds = ARRAY_SIZE(ep93xx_led_pins), 424 .leds = ep93xx_led_pins, 425 }; 426 427 /************************************************************************* 428 * EP93xx pwm peripheral handling 429 *************************************************************************/ 430 static struct resource ep93xx_pwm0_resource[] = { 431 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE, 0x10), 432 }; 433 434 static struct platform_device ep93xx_pwm0_device = { 435 .name = "ep93xx-pwm", 436 .id = 0, 437 .num_resources = ARRAY_SIZE(ep93xx_pwm0_resource), 438 .resource = ep93xx_pwm0_resource, 439 }; 440 441 static struct resource ep93xx_pwm1_resource[] = { 442 DEFINE_RES_MEM(EP93XX_PWM_PHYS_BASE + 0x20, 0x10), 443 }; 444 445 static struct platform_device ep93xx_pwm1_device = { 446 .name = "ep93xx-pwm", 447 .id = 1, 448 .num_resources = ARRAY_SIZE(ep93xx_pwm1_resource), 449 .resource = ep93xx_pwm1_resource, 450 }; 451 ep93xx_register_pwm(int pwm0,int pwm1)452 void __init ep93xx_register_pwm(int pwm0, int pwm1) 453 { 454 if (pwm0) 455 platform_device_register(&ep93xx_pwm0_device); 456 457 /* NOTE: EP9307 does not have PWMOUT1 (pin EGPIO14) */ 458 if (pwm1) 459 platform_device_register(&ep93xx_pwm1_device); 460 } 461 ep93xx_pwm_acquire_gpio(struct platform_device * pdev)462 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev) 463 { 464 int err; 465 466 if (pdev->id == 0) { 467 err = 0; 468 } else if (pdev->id == 1) { 469 err = gpio_request(EP93XX_GPIO_LINE_EGPIO14, 470 dev_name(&pdev->dev)); 471 if (err) 472 return err; 473 err = gpio_direction_output(EP93XX_GPIO_LINE_EGPIO14, 0); 474 if (err) 475 goto fail; 476 477 /* PWM 1 output on EGPIO[14] */ 478 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_PONG); 479 } else { 480 err = -ENODEV; 481 } 482 483 return err; 484 485 fail: 486 gpio_free(EP93XX_GPIO_LINE_EGPIO14); 487 return err; 488 } 489 EXPORT_SYMBOL(ep93xx_pwm_acquire_gpio); 490 ep93xx_pwm_release_gpio(struct platform_device * pdev)491 void ep93xx_pwm_release_gpio(struct platform_device *pdev) 492 { 493 if (pdev->id == 1) { 494 gpio_direction_input(EP93XX_GPIO_LINE_EGPIO14); 495 gpio_free(EP93XX_GPIO_LINE_EGPIO14); 496 497 /* EGPIO[14] used for GPIO */ 498 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_PONG); 499 } 500 } 501 EXPORT_SYMBOL(ep93xx_pwm_release_gpio); 502 503 504 /************************************************************************* 505 * EP93xx video peripheral handling 506 *************************************************************************/ 507 static struct ep93xxfb_mach_info ep93xxfb_data; 508 509 static struct resource ep93xx_fb_resource[] = { 510 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE, 0x800), 511 }; 512 513 static struct platform_device ep93xx_fb_device = { 514 .name = "ep93xx-fb", 515 .id = -1, 516 .dev = { 517 .platform_data = &ep93xxfb_data, 518 .coherent_dma_mask = DMA_BIT_MASK(32), 519 .dma_mask = &ep93xx_fb_device.dev.coherent_dma_mask, 520 }, 521 .num_resources = ARRAY_SIZE(ep93xx_fb_resource), 522 .resource = ep93xx_fb_resource, 523 }; 524 525 /* The backlight use a single register in the framebuffer's register space */ 526 #define EP93XX_RASTER_REG_BRIGHTNESS 0x20 527 528 static struct resource ep93xx_bl_resources[] = { 529 DEFINE_RES_MEM(EP93XX_RASTER_PHYS_BASE + 530 EP93XX_RASTER_REG_BRIGHTNESS, 0x04), 531 }; 532 533 static struct platform_device ep93xx_bl_device = { 534 .name = "ep93xx-bl", 535 .id = -1, 536 .num_resources = ARRAY_SIZE(ep93xx_bl_resources), 537 .resource = ep93xx_bl_resources, 538 }; 539 540 /** 541 * ep93xx_register_fb - Register the framebuffer platform device. 542 * @data: platform specific framebuffer configuration (__initdata) 543 */ ep93xx_register_fb(struct ep93xxfb_mach_info * data)544 void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data) 545 { 546 ep93xxfb_data = *data; 547 platform_device_register(&ep93xx_fb_device); 548 platform_device_register(&ep93xx_bl_device); 549 } 550 551 552 /************************************************************************* 553 * EP93xx matrix keypad peripheral handling 554 *************************************************************************/ 555 static struct ep93xx_keypad_platform_data ep93xx_keypad_data; 556 557 static struct resource ep93xx_keypad_resource[] = { 558 DEFINE_RES_MEM(EP93XX_KEY_MATRIX_PHYS_BASE, 0x0c), 559 DEFINE_RES_IRQ(IRQ_EP93XX_KEY), 560 }; 561 562 static struct platform_device ep93xx_keypad_device = { 563 .name = "ep93xx-keypad", 564 .id = -1, 565 .dev = { 566 .platform_data = &ep93xx_keypad_data, 567 }, 568 .num_resources = ARRAY_SIZE(ep93xx_keypad_resource), 569 .resource = ep93xx_keypad_resource, 570 }; 571 572 /** 573 * ep93xx_register_keypad - Register the keypad platform device. 574 * @data: platform specific keypad configuration (__initdata) 575 */ ep93xx_register_keypad(struct ep93xx_keypad_platform_data * data)576 void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data) 577 { 578 ep93xx_keypad_data = *data; 579 platform_device_register(&ep93xx_keypad_device); 580 } 581 ep93xx_keypad_acquire_gpio(struct platform_device * pdev)582 int ep93xx_keypad_acquire_gpio(struct platform_device *pdev) 583 { 584 int err; 585 int i; 586 587 for (i = 0; i < 8; i++) { 588 err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev)); 589 if (err) 590 goto fail_gpio_c; 591 err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev)); 592 if (err) 593 goto fail_gpio_d; 594 } 595 596 /* Enable the keypad controller; GPIO ports C and D used for keypad */ 597 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS | 598 EP93XX_SYSCON_DEVCFG_GONK); 599 600 return 0; 601 602 fail_gpio_d: 603 gpio_free(EP93XX_GPIO_LINE_C(i)); 604 fail_gpio_c: 605 for (--i; i >= 0; --i) { 606 gpio_free(EP93XX_GPIO_LINE_C(i)); 607 gpio_free(EP93XX_GPIO_LINE_D(i)); 608 } 609 return err; 610 } 611 EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio); 612 ep93xx_keypad_release_gpio(struct platform_device * pdev)613 void ep93xx_keypad_release_gpio(struct platform_device *pdev) 614 { 615 int i; 616 617 for (i = 0; i < 8; i++) { 618 gpio_free(EP93XX_GPIO_LINE_C(i)); 619 gpio_free(EP93XX_GPIO_LINE_D(i)); 620 } 621 622 /* Disable the keypad controller; GPIO ports C and D used for GPIO */ 623 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS | 624 EP93XX_SYSCON_DEVCFG_GONK); 625 } 626 EXPORT_SYMBOL(ep93xx_keypad_release_gpio); 627 628 /************************************************************************* 629 * EP93xx I2S audio peripheral handling 630 *************************************************************************/ 631 static struct resource ep93xx_i2s_resource[] = { 632 DEFINE_RES_MEM(EP93XX_I2S_PHYS_BASE, 0x100), 633 }; 634 635 static struct platform_device ep93xx_i2s_device = { 636 .name = "ep93xx-i2s", 637 .id = -1, 638 .num_resources = ARRAY_SIZE(ep93xx_i2s_resource), 639 .resource = ep93xx_i2s_resource, 640 }; 641 642 static struct platform_device ep93xx_pcm_device = { 643 .name = "ep93xx-pcm-audio", 644 .id = -1, 645 }; 646 ep93xx_register_i2s(void)647 void __init ep93xx_register_i2s(void) 648 { 649 platform_device_register(&ep93xx_i2s_device); 650 platform_device_register(&ep93xx_pcm_device); 651 } 652 653 #define EP93XX_SYSCON_DEVCFG_I2S_MASK (EP93XX_SYSCON_DEVCFG_I2SONSSP | \ 654 EP93XX_SYSCON_DEVCFG_I2SONAC97) 655 656 #define EP93XX_I2SCLKDIV_MASK (EP93XX_SYSCON_I2SCLKDIV_ORIDE | \ 657 EP93XX_SYSCON_I2SCLKDIV_SPOL) 658 ep93xx_i2s_acquire(void)659 int ep93xx_i2s_acquire(void) 660 { 661 unsigned val; 662 663 ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_I2SONAC97, 664 EP93XX_SYSCON_DEVCFG_I2S_MASK); 665 666 /* 667 * This is potentially racy with the clock api for i2s_mclk, sclk and 668 * lrclk. Since the i2s driver is the only user of those clocks we 669 * rely on it to prevent parallel use of this function and the 670 * clock api for the i2s clocks. 671 */ 672 val = __raw_readl(EP93XX_SYSCON_I2SCLKDIV); 673 val &= ~EP93XX_I2SCLKDIV_MASK; 674 val |= EP93XX_SYSCON_I2SCLKDIV_ORIDE | EP93XX_SYSCON_I2SCLKDIV_SPOL; 675 ep93xx_syscon_swlocked_write(val, EP93XX_SYSCON_I2SCLKDIV); 676 677 return 0; 678 } 679 EXPORT_SYMBOL(ep93xx_i2s_acquire); 680 ep93xx_i2s_release(void)681 void ep93xx_i2s_release(void) 682 { 683 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2S_MASK); 684 } 685 EXPORT_SYMBOL(ep93xx_i2s_release); 686 687 /************************************************************************* 688 * EP93xx AC97 audio peripheral handling 689 *************************************************************************/ 690 static struct resource ep93xx_ac97_resources[] = { 691 DEFINE_RES_MEM(EP93XX_AAC_PHYS_BASE, 0xac), 692 DEFINE_RES_IRQ(IRQ_EP93XX_AACINTR), 693 }; 694 695 static struct platform_device ep93xx_ac97_device = { 696 .name = "ep93xx-ac97", 697 .id = -1, 698 .num_resources = ARRAY_SIZE(ep93xx_ac97_resources), 699 .resource = ep93xx_ac97_resources, 700 }; 701 ep93xx_register_ac97(void)702 void __init ep93xx_register_ac97(void) 703 { 704 /* 705 * Make sure that the AC97 pins are not used by I2S. 706 */ 707 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_I2SONAC97); 708 709 platform_device_register(&ep93xx_ac97_device); 710 platform_device_register(&ep93xx_pcm_device); 711 } 712 713 /************************************************************************* 714 * EP93xx Watchdog 715 *************************************************************************/ 716 static struct resource ep93xx_wdt_resources[] = { 717 DEFINE_RES_MEM(EP93XX_WATCHDOG_PHYS_BASE, 0x08), 718 }; 719 720 static struct platform_device ep93xx_wdt_device = { 721 .name = "ep93xx-wdt", 722 .id = -1, 723 .num_resources = ARRAY_SIZE(ep93xx_wdt_resources), 724 .resource = ep93xx_wdt_resources, 725 }; 726 727 /************************************************************************* 728 * EP93xx IDE 729 *************************************************************************/ 730 static struct resource ep93xx_ide_resources[] = { 731 DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38), 732 DEFINE_RES_IRQ(IRQ_EP93XX_EXT3), 733 }; 734 735 static struct platform_device ep93xx_ide_device = { 736 .name = "ep93xx-ide", 737 .id = -1, 738 .dev = { 739 .dma_mask = &ep93xx_ide_device.dev.coherent_dma_mask, 740 .coherent_dma_mask = DMA_BIT_MASK(32), 741 }, 742 .num_resources = ARRAY_SIZE(ep93xx_ide_resources), 743 .resource = ep93xx_ide_resources, 744 }; 745 ep93xx_register_ide(void)746 void __init ep93xx_register_ide(void) 747 { 748 platform_device_register(&ep93xx_ide_device); 749 } 750 ep93xx_ide_acquire_gpio(struct platform_device * pdev)751 int ep93xx_ide_acquire_gpio(struct platform_device *pdev) 752 { 753 int err; 754 int i; 755 756 err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev)); 757 if (err) 758 return err; 759 err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev)); 760 if (err) 761 goto fail_egpio15; 762 for (i = 2; i < 8; i++) { 763 err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev)); 764 if (err) 765 goto fail_gpio_e; 766 } 767 for (i = 4; i < 8; i++) { 768 err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev)); 769 if (err) 770 goto fail_gpio_g; 771 } 772 for (i = 0; i < 8; i++) { 773 err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev)); 774 if (err) 775 goto fail_gpio_h; 776 } 777 778 /* GPIO ports E[7:2], G[7:4] and H used by IDE */ 779 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE | 780 EP93XX_SYSCON_DEVCFG_GONIDE | 781 EP93XX_SYSCON_DEVCFG_HONIDE); 782 return 0; 783 784 fail_gpio_h: 785 for (--i; i >= 0; --i) 786 gpio_free(EP93XX_GPIO_LINE_H(i)); 787 i = 8; 788 fail_gpio_g: 789 for (--i; i >= 4; --i) 790 gpio_free(EP93XX_GPIO_LINE_G(i)); 791 i = 8; 792 fail_gpio_e: 793 for (--i; i >= 2; --i) 794 gpio_free(EP93XX_GPIO_LINE_E(i)); 795 gpio_free(EP93XX_GPIO_LINE_EGPIO15); 796 fail_egpio15: 797 gpio_free(EP93XX_GPIO_LINE_EGPIO2); 798 return err; 799 } 800 EXPORT_SYMBOL(ep93xx_ide_acquire_gpio); 801 ep93xx_ide_release_gpio(struct platform_device * pdev)802 void ep93xx_ide_release_gpio(struct platform_device *pdev) 803 { 804 int i; 805 806 for (i = 2; i < 8; i++) 807 gpio_free(EP93XX_GPIO_LINE_E(i)); 808 for (i = 4; i < 8; i++) 809 gpio_free(EP93XX_GPIO_LINE_G(i)); 810 for (i = 0; i < 8; i++) 811 gpio_free(EP93XX_GPIO_LINE_H(i)); 812 gpio_free(EP93XX_GPIO_LINE_EGPIO15); 813 gpio_free(EP93XX_GPIO_LINE_EGPIO2); 814 815 816 /* GPIO ports E[7:2], G[7:4] and H used by GPIO */ 817 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE | 818 EP93XX_SYSCON_DEVCFG_GONIDE | 819 EP93XX_SYSCON_DEVCFG_HONIDE); 820 } 821 EXPORT_SYMBOL(ep93xx_ide_release_gpio); 822 823 /************************************************************************* 824 * EP93xx Security peripheral 825 *************************************************************************/ 826 827 /* 828 * The Maverick Key is 256 bits of micro fuses blown at the factory during 829 * manufacturing to uniquely identify a part. 830 * 831 * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key 832 */ 833 #define EP93XX_SECURITY_REG(x) (EP93XX_SECURITY_BASE + (x)) 834 #define EP93XX_SECURITY_SECFLG EP93XX_SECURITY_REG(0x2400) 835 #define EP93XX_SECURITY_FUSEFLG EP93XX_SECURITY_REG(0x2410) 836 #define EP93XX_SECURITY_UNIQID EP93XX_SECURITY_REG(0x2440) 837 #define EP93XX_SECURITY_UNIQCHK EP93XX_SECURITY_REG(0x2450) 838 #define EP93XX_SECURITY_UNIQVAL EP93XX_SECURITY_REG(0x2460) 839 #define EP93XX_SECURITY_SECID1 EP93XX_SECURITY_REG(0x2500) 840 #define EP93XX_SECURITY_SECID2 EP93XX_SECURITY_REG(0x2504) 841 #define EP93XX_SECURITY_SECCHK1 EP93XX_SECURITY_REG(0x2520) 842 #define EP93XX_SECURITY_SECCHK2 EP93XX_SECURITY_REG(0x2524) 843 #define EP93XX_SECURITY_UNIQID2 EP93XX_SECURITY_REG(0x2700) 844 #define EP93XX_SECURITY_UNIQID3 EP93XX_SECURITY_REG(0x2704) 845 #define EP93XX_SECURITY_UNIQID4 EP93XX_SECURITY_REG(0x2708) 846 #define EP93XX_SECURITY_UNIQID5 EP93XX_SECURITY_REG(0x270c) 847 848 static char ep93xx_soc_id[33]; 849 ep93xx_get_soc_id(void)850 static const char __init *ep93xx_get_soc_id(void) 851 { 852 unsigned int id, id2, id3, id4, id5; 853 854 if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1) 855 return "bad Hamming code"; 856 857 id = __raw_readl(EP93XX_SECURITY_UNIQID); 858 id2 = __raw_readl(EP93XX_SECURITY_UNIQID2); 859 id3 = __raw_readl(EP93XX_SECURITY_UNIQID3); 860 id4 = __raw_readl(EP93XX_SECURITY_UNIQID4); 861 id5 = __raw_readl(EP93XX_SECURITY_UNIQID5); 862 863 if (id != id2) 864 return "invalid"; 865 866 /* Toss the unique ID into the entropy pool */ 867 add_device_randomness(&id2, 4); 868 add_device_randomness(&id3, 4); 869 add_device_randomness(&id4, 4); 870 add_device_randomness(&id5, 4); 871 872 snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id), 873 "%08x%08x%08x%08x", id2, id3, id4, id5); 874 875 return ep93xx_soc_id; 876 } 877 ep93xx_get_soc_rev(void)878 static const char __init *ep93xx_get_soc_rev(void) 879 { 880 int rev = ep93xx_chip_revision(); 881 882 switch (rev) { 883 case EP93XX_CHIP_REV_D0: 884 return "D0"; 885 case EP93XX_CHIP_REV_D1: 886 return "D1"; 887 case EP93XX_CHIP_REV_E0: 888 return "E0"; 889 case EP93XX_CHIP_REV_E1: 890 return "E1"; 891 case EP93XX_CHIP_REV_E2: 892 return "E2"; 893 default: 894 return "unknown"; 895 } 896 } 897 ep93xx_get_machine_name(void)898 static const char __init *ep93xx_get_machine_name(void) 899 { 900 return kasprintf(GFP_KERNEL,"%s", machine_desc->name); 901 } 902 ep93xx_init_soc(void)903 static struct device __init *ep93xx_init_soc(void) 904 { 905 struct soc_device_attribute *soc_dev_attr; 906 struct soc_device *soc_dev; 907 908 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); 909 if (!soc_dev_attr) 910 return NULL; 911 912 soc_dev_attr->machine = ep93xx_get_machine_name(); 913 soc_dev_attr->family = "Cirrus Logic EP93xx"; 914 soc_dev_attr->revision = ep93xx_get_soc_rev(); 915 soc_dev_attr->soc_id = ep93xx_get_soc_id(); 916 917 soc_dev = soc_device_register(soc_dev_attr); 918 if (IS_ERR(soc_dev)) { 919 kfree(soc_dev_attr->machine); 920 kfree(soc_dev_attr); 921 return NULL; 922 } 923 924 return soc_device_to_device(soc_dev); 925 } 926 ep93xx_init_devices(void)927 struct device __init *ep93xx_init_devices(void) 928 { 929 struct device *parent; 930 931 /* Disallow access to MaverickCrunch initially */ 932 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA); 933 934 /* Default all ports to GPIO */ 935 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS | 936 EP93XX_SYSCON_DEVCFG_GONK | 937 EP93XX_SYSCON_DEVCFG_EONIDE | 938 EP93XX_SYSCON_DEVCFG_GONIDE | 939 EP93XX_SYSCON_DEVCFG_HONIDE); 940 941 parent = ep93xx_init_soc(); 942 943 /* Get the GPIO working early, other devices need it */ 944 platform_device_register(&ep93xx_gpio_device); 945 946 amba_device_register(&uart1_device, &iomem_resource); 947 amba_device_register(&uart2_device, &iomem_resource); 948 amba_device_register(&uart3_device, &iomem_resource); 949 950 platform_device_register(&ep93xx_rtc_device); 951 platform_device_register(&ep93xx_ohci_device); 952 platform_device_register(&ep93xx_wdt_device); 953 954 gpio_led_register_device(-1, &ep93xx_led_data); 955 956 return parent; 957 } 958 ep93xx_restart(enum reboot_mode mode,const char * cmd)959 void ep93xx_restart(enum reboot_mode mode, const char *cmd) 960 { 961 /* 962 * Set then clear the SWRST bit to initiate a software reset 963 */ 964 ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_SWRST); 965 ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_SWRST); 966 967 while (1) 968 ; 969 } 970 ep93xx_init_late(void)971 void __init ep93xx_init_late(void) 972 { 973 crunch_init(); 974 } 975