generic.c 1.5 KB

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  1. /*
  2. * arch/arm/mach-imx/generic.c
  3. *
  4. * author: Sascha Hauer
  5. * Created: april 20th, 2004
  6. * Copyright: Synertronixx GmbH
  7. *
  8. * Common code for i.MX machines
  9. *
  10. * SPDX-License-Identifier: GPL-2.0+
  11. */
  12. #include <common.h>
  13. #ifdef CONFIG_IMX
  14. #include <asm/arch/imx-regs.h>
  15. void imx_gpio_mode(int gpio_mode)
  16. {
  17. unsigned int pin = gpio_mode & GPIO_PIN_MASK;
  18. unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5;
  19. unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10;
  20. unsigned int tmp;
  21. /* Pullup enable */
  22. if(gpio_mode & GPIO_PUEN)
  23. PUEN(port) |= (1<<pin);
  24. else
  25. PUEN(port) &= ~(1<<pin);
  26. /* Data direction */
  27. if(gpio_mode & GPIO_OUT)
  28. DDIR(port) |= 1<<pin;
  29. else
  30. DDIR(port) &= ~(1<<pin);
  31. /* Primary / alternate function */
  32. if(gpio_mode & GPIO_AF)
  33. GPR(port) |= (1<<pin);
  34. else
  35. GPR(port) &= ~(1<<pin);
  36. /* use as gpio? */
  37. if( ocr == 3 )
  38. GIUS(port) |= (1<<pin);
  39. else
  40. GIUS(port) &= ~(1<<pin);
  41. /* Output / input configuration */
  42. /* FIXME: I'm not very sure about OCR and ICONF, someone
  43. * should have a look over it
  44. */
  45. if(pin<16) {
  46. tmp = OCR1(port);
  47. tmp &= ~( 3<<(pin*2));
  48. tmp |= (ocr << (pin*2));
  49. OCR1(port) = tmp;
  50. if( gpio_mode & GPIO_AOUT )
  51. ICONFA1(port) &= ~( 3<<(pin*2));
  52. if( gpio_mode & GPIO_BOUT )
  53. ICONFB1(port) &= ~( 3<<(pin*2));
  54. } else {
  55. tmp = OCR2(port);
  56. tmp &= ~( 3<<((pin-16)*2));
  57. tmp |= (ocr << ((pin-16)*2));
  58. OCR2(port) = tmp;
  59. if( gpio_mode & GPIO_AOUT )
  60. ICONFA2(port) &= ~( 3<<((pin-16)*2));
  61. if( gpio_mode & GPIO_BOUT )
  62. ICONFB2(port) &= ~( 3<<((pin-16)*2));
  63. }
  64. }
  65. #endif /* CONFIG_IMX */