superio.c 1.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2013 Imagination Technologies
  4. * Author: Paul Burton <paul.burton@mips.com>
  5. *
  6. * Setup code for the FDC37M817 super I/O controller
  7. */
  8. #include <common.h>
  9. #include <asm/io.h>
  10. #define SIO_CONF_PORT 0x3f0
  11. #define SIO_DATA_PORT 0x3f1
  12. enum sio_conf_key {
  13. SIOCONF_DEVNUM = 0x07,
  14. SIOCONF_ACTIVATE = 0x30,
  15. SIOCONF_ENTER_SETUP = 0x55,
  16. SIOCONF_BASE_HIGH = 0x60,
  17. SIOCONF_BASE_LOW = 0x61,
  18. SIOCONF_PRIMARY_INT = 0x70,
  19. SIOCONF_EXIT_SETUP = 0xaa,
  20. SIOCONF_MODE = 0xf0,
  21. };
  22. static struct {
  23. u8 key;
  24. u8 data;
  25. } sio_config[] = {
  26. /* tty0 */
  27. { SIOCONF_DEVNUM, 0x04 },
  28. { SIOCONF_BASE_HIGH, 0x03 },
  29. { SIOCONF_BASE_LOW, 0xf8 },
  30. { SIOCONF_MODE, 0x02 },
  31. { SIOCONF_PRIMARY_INT, 0x04 },
  32. { SIOCONF_ACTIVATE, 0x01 },
  33. /* tty1 */
  34. { SIOCONF_DEVNUM, 0x05 },
  35. { SIOCONF_BASE_HIGH, 0x02 },
  36. { SIOCONF_BASE_LOW, 0xf8 },
  37. { SIOCONF_MODE, 0x02 },
  38. { SIOCONF_PRIMARY_INT, 0x03 },
  39. { SIOCONF_ACTIVATE, 0x01 },
  40. };
  41. void malta_superio_init(void)
  42. {
  43. unsigned i;
  44. /* enter config state */
  45. outb(SIOCONF_ENTER_SETUP, SIO_CONF_PORT);
  46. /* configure peripherals */
  47. for (i = 0; i < ARRAY_SIZE(sio_config); i++) {
  48. outb(sio_config[i].key, SIO_CONF_PORT);
  49. outb(sio_config[i].data, SIO_DATA_PORT);
  50. }
  51. /* exit config state */
  52. outb(SIOCONF_EXIT_SETUP, SIO_CONF_PORT);
  53. }