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arch
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mips
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loongson
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common
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serial.c

serial.c 2.3 KB
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  1. /*
    2. 

  2.  * This file is subject to the terms and conditions of the GNU General Public
    3. 

  3.  * License.  See the file "COPYING" in the main directory of this archive
    4. 

  4.  * for more details.
    5. 

  5.  *
    6. 

  6.  * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
    7. 

  7.  *
    8. 

  8.  * Copyright (C) 2009 Lemote, Inc.
    9. 

  9.  * Author: Yan hua (yanhua@lemote.com)
    10. 

  10.  * Author: Wu Zhangjin (wuzhangjin@gmail.com)
    11. 

  11.  */
    12. 

  12. 

  13. #include <linux/io.h>
    14. 

  14. #include <linux/init.h>
    15. 

  15. #include <linux/serial_8250.h>
    16. 

  16. 

  17. #include <asm/bootinfo.h>
    18. 

  18. 

  19. #include <loongson.h>
    20. 

  20. #include <machine.h>
    21. 

  21. 

  22. #define PORT(int, clk)			\
    23. 

  23. {								\
    24. 

  24. 	.irq		= int,					\
    25. 

  25. 	.uartclk	= clk,					\
    26. 

  26. 	.iotype		= UPIO_PORT,				\
    27. 

  27. 	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
    28. 

  28. 	.regshift	= 0,					\
    29. 

  29. }
    30. 

  30. 

  31. #define PORT_M(int, clk)				\
    32. 

  32. {								\
    33. 

  33. 	.irq		= MIPS_CPU_IRQ_BASE + (int),		\
    34. 

  34. 	.uartclk	= clk,					\
    35. 

  35. 	.iotype		= UPIO_MEM,				\
    36. 

  36. 	.membase	= (void __iomem *)NULL,			\
    37. 

  37. 	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
    38. 

  38. 	.regshift	= 0,					\
    39. 

  39. }
    40. 

  40. 

  41. static struct plat_serial8250_port uart8250_data[][2] = {
    42. 

  42. 	[MACH_LOONGSON_UNKNOWN]		{},
    43. 

  43. 	[MACH_LEMOTE_FL2E]              {PORT(4, 1843200), {} },
    44. 

  44. 	[MACH_LEMOTE_FL2F]              {PORT(3, 1843200), {} },
    45. 

  45. 	[MACH_LEMOTE_ML2F7]             {PORT_M(3, 3686400), {} },
    46. 

  46. 	[MACH_LEMOTE_YL2F89]            {PORT_M(3, 3686400), {} },
    47. 

  47. 	[MACH_DEXXON_GDIUM2F10]         {PORT_M(3, 3686400), {} },
    48. 

  48. 	[MACH_LEMOTE_NAS]               {PORT_M(3, 3686400), {} },
    49. 

  49. 	[MACH_LEMOTE_LL2F]              {PORT(3, 1843200), {} },
    50. 

  50. 	[MACH_LEMOTE_A1004]             {PORT_M(2, 33177600), {} },
    51. 

  51. 	[MACH_LEMOTE_A1101]             {PORT_M(2, 25000000), {} },
    52. 

  52. 	[MACH_LEMOTE_A1201]             {PORT_M(2, 25000000), {} },
    53. 

  53. 	[MACH_LEMOTE_A1205]             {PORT_M(2, 25000000), {} },
    54. 

  54. 	[MACH_LOONGSON_END]		{},
    55. 

  55. };
    56. 

  56. 

  57. static struct platform_device uart8250_device = {
    58. 

  58. 	.name = "serial8250",
    59. 

  59. 	.id = PLAT8250_DEV_PLATFORM,
    60. 

  60. };
    61. 

  61. 

  62. static int __init serial_init(void)
    63. 

  63. {
    64. 

  64. 	unsigned char iotype;
    65. 

  65. 

  66. 	iotype = uart8250_data[mips_machtype][0].iotype;
    67. 

  67. 

  68. 	if (UPIO_MEM == iotype)
    69. 

  69. 		uart8250_data[mips_machtype][0].membase =
    70. 

  70. 			(void __iomem *)_loongson_uart_base;
    71. 

  71. 	else if (UPIO_PORT == iotype)
    72. 

  72. 		uart8250_data[mips_machtype][0].iobase =
    73. 

  73. 		    loongson_uart_base - LOONGSON_PCIIO_BASE;
    74. 

  74. 

  75. 	uart8250_device.dev.platform_data = uart8250_data[mips_machtype];
    76. 

  76. 

  77. 	return platform_device_register(&uart8250_device);
    78. 

  78. }
    79. 

  79. 

  80. device_initcall(serial_init);
    81.