s3c2410.c 3.1 KB

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  1. /* linux/arch/arm/mach-s3c2410/s3c2410.c
  2. *
  3. * Copyright (c) 2003-2005 Simtec Electronics
  4. * Ben Dooks <ben@simtec.co.uk>
  5. *
  6. * http://www.simtec.co.uk/products/EB2410ITX/
  7. *
  8. * This program is free software; you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License version 2 as
  10. * published by the Free Software Foundation.
  11. */
  12. #include <linux/kernel.h>
  13. #include <linux/types.h>
  14. #include <linux/interrupt.h>
  15. #include <linux/list.h>
  16. #include <linux/timer.h>
  17. #include <linux/init.h>
  18. #include <linux/sysdev.h>
  19. #include <linux/serial_core.h>
  20. #include <linux/platform_device.h>
  21. #include <asm/mach/arch.h>
  22. #include <asm/mach/map.h>
  23. #include <asm/mach/irq.h>
  24. #include <asm/hardware.h>
  25. #include <asm/io.h>
  26. #include <asm/irq.h>
  27. #include <asm/arch/regs-clock.h>
  28. #include <asm/arch/regs-serial.h>
  29. #include <asm/plat-s3c24xx/s3c2410.h>
  30. #include <asm/plat-s3c24xx/cpu.h>
  31. #include <asm/plat-s3c24xx/devs.h>
  32. #include <asm/plat-s3c24xx/clock.h>
  33. /* Initial IO mappings */
  34. static struct map_desc s3c2410_iodesc[] __initdata = {
  35. IODESC_ENT(CLKPWR),
  36. IODESC_ENT(LCD),
  37. IODESC_ENT(TIMER),
  38. IODESC_ENT(WATCHDOG),
  39. };
  40. /* our uart devices */
  41. /* uart registration process */
  42. void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  43. {
  44. s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
  45. }
  46. /* s3c2410_map_io
  47. *
  48. * register the standard cpu IO areas, and any passed in from the
  49. * machine specific initialisation.
  50. */
  51. void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size)
  52. {
  53. /* register our io-tables */
  54. iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
  55. iotable_init(mach_desc, mach_size);
  56. }
  57. void __init s3c2410_init_clocks(int xtal)
  58. {
  59. unsigned long tmp;
  60. unsigned long fclk;
  61. unsigned long hclk;
  62. unsigned long pclk;
  63. /* now we've got our machine bits initialised, work out what
  64. * clocks we've got */
  65. fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
  66. tmp = __raw_readl(S3C2410_CLKDIVN);
  67. /* work out clock scalings */
  68. hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
  69. pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
  70. /* print brieft summary of clocks, etc */
  71. printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
  72. print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
  73. /* initialise the clocks here, to allow other things like the
  74. * console to use them
  75. */
  76. s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
  77. s3c2410_baseclk_add();
  78. }
  79. struct sysdev_class s3c2410_sysclass = {
  80. set_kset_name("s3c2410-core"),
  81. };
  82. static struct sys_device s3c2410_sysdev = {
  83. .cls = &s3c2410_sysclass,
  84. };
  85. /* need to register class before we actually register the device, and
  86. * we also need to ensure that it has been initialised before any of the
  87. * drivers even try to use it (even if not on an s3c2410 based system)
  88. * as a driver which may support both 2410 and 2440 may try and use it.
  89. */
  90. static int __init s3c2410_core_init(void)
  91. {
  92. return sysdev_class_register(&s3c2410_sysclass);
  93. }
  94. core_initcall(s3c2410_core_init);
  95. int __init s3c2410_init(void)
  96. {
  97. printk("S3C2410: Initialising architecture\n");
  98. return sysdev_register(&s3c2410_sysdev);
  99. }