malta-platform.c 2.0 KB

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  1. /*
  2. * This file is subject to the terms and conditions of the GNU General Public
  3. * License. See the file "COPYING" in the main directory of this archive
  4. * for more details.
  5. *
  6. * Copyright (C) 2006, 07 MIPS Technologies, Inc.
  7. * written by Ralf Baechle (ralf@linux-mips.org)
  8. * written by Ralf Baechle <ralf@linux-mips.org>
  9. *
  10. * Copyright (C) 2008 Wind River Systems, Inc.
  11. * updated by Tiejun Chen <tiejun.chen@windriver.com>
  12. *
  13. * 1. Probe driver for the Malta's UART ports:
  14. *
  15. * o 2 ports in the SMC SuperIO
  16. * o 1 port in the CBUS UART, a discrete 16550 which normally is only used
  17. * for bringups.
  18. *
  19. * We don't use 8250_platform.c on Malta as it would result in the CBUS
  20. * UART becoming ttyS0.
  21. *
  22. * 2. Register RTC-CMOS platform device on Malta.
  23. */
  24. #include <linux/init.h>
  25. #include <linux/serial_8250.h>
  26. #include <linux/irq.h>
  27. #include <linux/platform_device.h>
  28. #include <asm/mips-boards/maltaint.h>
  29. #define SMC_PORT(base, int) \
  30. { \
  31. .iobase = base, \
  32. .irq = int, \
  33. .uartclk = 1843200, \
  34. .iotype = UPIO_PORT, \
  35. .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
  36. .regshift = 0, \
  37. }
  38. #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
  39. static struct plat_serial8250_port uart8250_data[] = {
  40. SMC_PORT(0x3F8, 4),
  41. SMC_PORT(0x2F8, 3),
  42. #ifndef CONFIG_MIPS_CMP
  43. {
  44. .mapbase = 0x1f000900, /* The CBUS UART */
  45. .irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
  46. .uartclk = 3686400, /* Twice the usual clk! */
  47. .iotype = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ?
  48. UPIO_MEM32BE : UPIO_MEM32,
  49. .flags = CBUS_UART_FLAGS,
  50. .regshift = 3,
  51. },
  52. #endif
  53. { },
  54. };
  55. static struct platform_device malta_uart8250_device = {
  56. .name = "serial8250",
  57. .id = PLAT8250_DEV_PLATFORM,
  58. .dev = {
  59. .platform_data = uart8250_data,
  60. },
  61. };
  62. static struct platform_device *malta_devices[] __initdata = {
  63. &malta_uart8250_device,
  64. };
  65. static int __init malta_add_devices(void)
  66. {
  67. return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
  68. }
  69. device_initcall(malta_add_devices);