/arch/arm/mach-shark/core.c

https://bitbucket.org/evzijst/gittest · C · 114 lines · 88 code · 18 blank · 8 comment · 1 complexity · 7db21d21d43c326a45b642e3fa05365f MD5 · raw file 

    

  1. /*
    2. 

  2.  *  linux/arch/arm/mach-shark/arch.c
    3. 

  3.  *
    4. 

  4.  *  Architecture specific stuff.
    5. 

  5.  */
    6. 

  6. #include <linux/kernel.h>
    7. 

  7. #include <linux/init.h>
    8. 

  8. #include <linux/interrupt.h>
    9. 

  9. #include <linux/sched.h>
    10. 

  10. #include <linux/serial_8250.h>
    11. 

  11. 

  12. #include <asm/setup.h>
    13. 

  13. #include <asm/mach-types.h>
    14. 

  14. #include <asm/io.h>
    15. 

  15. #include <asm/leds.h>
    16. 

  16. #include <asm/param.h>
    17. 

  17. 

  18. #include <asm/mach/map.h>
    19. 

  19. #include <asm/mach/arch.h>
    20. 

  20. #include <asm/mach/time.h>
    21. 

  21. 

  22. static struct plat_serial8250_port serial_platform_data[] = {
    23. 

  23. 	{
    24. 

  24. 		.iobase		= 0x3f8,
    25. 

  25. 		.irq		= 4,
    26. 

  26. 		.uartclk	= 1843200,
    27. 

  27. 		.regshift	= 2,
    28. 

  28. 		.iotype		= UPIO_PORT,
    29. 

  29. 		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
    30. 

  30. 	},
    31. 

  31. 	{
    32. 

  32. 		.iobase		= 0x2f8,
    33. 

  33. 		.irq		= 3,
    34. 

  34. 		.uartclk	= 1843200,
    35. 

  35. 		.regshift	= 2,
    36. 

  36. 		.iotype		= UPIO_PORT,
    37. 

  37. 		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
    38. 

  38. 	},
    39. 

  39. 	{ },
    40. 

  40. };
    41. 

  41. 

  42. static struct platform_device serial_device = {
    43. 

  43. 	.name			= "serial8250",
    44. 

  44. 	.id			= 0,
    45. 

  45. 	.dev			= {
    46. 

  46. 		.platform_data	= serial_platform_data,
    47. 

  47. 	},
    48. 

  48. };
    49. 

  49. 

  50. static int __init shark_init(void)
    51. 

  51. {
    52. 

  52. 	int ret;
    53. 

  53. 

  54. 	if (machine_is_shark())
    55. 

  55. 		ret = platform_device_register(&serial_device);
    56. 

  56. 

  57. 	return ret;
    58. 

  58. }
    59. 

  59. 

  60. arch_initcall(shark_init);
    61. 

  61. 

  62. extern void shark_init_irq(void);
    63. 

  63. 

  64. static struct map_desc shark_io_desc[] __initdata = {
    65. 

  65. 	{ IO_BASE	, IO_START	, IO_SIZE	, MT_DEVICE }
    66. 

  66. };
    67. 

  67. 

  68. static void __init shark_map_io(void)
    69. 

  69. {
    70. 

  70. 	iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
    71. 

  71. }
    72. 

  72. 

  73. #define IRQ_TIMER 0
    74. 

  74. #define HZ_TIME ((1193180 + HZ/2) / HZ)
    75. 

  75. 

  76. static irqreturn_t
    77. 

  77. shark_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
    78. 

  78. {
    79. 

  79. 	write_seqlock(&xtime_lock);
    80. 

  80. 	timer_tick(regs);
    81. 

  81. 	write_sequnlock(&xtime_lock);
    82. 

  82. 	return IRQ_HANDLED;
    83. 

  83. }
    84. 

  84. 

  85. static struct irqaction shark_timer_irq = {
    86. 

  86. 	.name		= "Shark Timer Tick",
    87. 

  87. 	.flags		= SA_INTERRUPT,
    88. 

  88. 	.handler	= shark_timer_interrupt
    89. 

  89. };
    90. 

  90. 

  91. /*
    92. 

  92.  * Set up timer interrupt, and return the current time in seconds.
    93. 

  93.  */
    94. 

  94. static void __init shark_timer_init(void)
    95. 

  95. {
    96. 

  96. 	outb(0x34, 0x43);               /* binary, mode 0, LSB/MSB, Ch 0 */
    97. 

  97. 	outb(HZ_TIME & 0xff, 0x40);     /* LSB of count */
    98. 

  98. 	outb(HZ_TIME >> 8, 0x40);
    99. 

  99. 

  100. 	setup_irq(IRQ_TIMER, &shark_timer_irq);
    101. 

  101. }
    102. 

  102. 

  103. static struct sys_timer shark_timer = {
    104. 

  104. 	.init		= shark_timer_init,
    105. 

  105. };
    106. 

  106. 

  107. MACHINE_START(SHARK, "Shark")
    108. 

  108. 	MAINTAINER("Alexander Schulz")
    109. 

  109. 	BOOT_MEM(0x08000000, 0x40000000, 0xe0000000)
    110. 

  110. 	BOOT_PARAMS(0x08003000)
    111. 

  111. 	MAPIO(shark_map_io)
    112. 

  112. 	INITIRQ(shark_init_irq)
    113. 

  113. 	.timer		= &shark_timer,
    114. 

  114. MACHINE_END
    115.