s3c244x-irq.c 3.5 KB

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  1. /* linux/arch/arm/plat-s3c24xx/s3c244x-irq.c
  2. *
  3. * Copyright (c) 2003,2004 Simtec Electronics
  4. * Ben Dooks <ben@simtec.co.uk>
  5. *
  6. * This program is free software; you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License as published by
  8. * the Free Software Foundation; either version 2 of the License, or
  9. * (at your option) any later version.
  10. *
  11. * This program is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with this program; if not, write to the Free Software
  18. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19. *
  20. */
  21. #include <linux/init.h>
  22. #include <linux/module.h>
  23. #include <linux/interrupt.h>
  24. #include <linux/ioport.h>
  25. #include <linux/ptrace.h>
  26. #include <linux/sysdev.h>
  27. #include <asm/hardware.h>
  28. #include <asm/irq.h>
  29. #include <asm/io.h>
  30. #include <asm/mach/irq.h>
  31. #include <asm/arch/regs-irq.h>
  32. #include <asm/arch/regs-gpio.h>
  33. #include <asm/plat-s3c24xx/cpu.h>
  34. #include <asm/plat-s3c24xx/pm.h>
  35. #include <asm/plat-s3c24xx/irq.h>
  36. /* camera irq */
  37. static void s3c_irq_demux_cam(unsigned int irq,
  38. struct irq_desc *desc)
  39. {
  40. unsigned int subsrc, submsk;
  41. struct irq_desc *mydesc;
  42. /* read the current pending interrupts, and the mask
  43. * for what it is available */
  44. subsrc = __raw_readl(S3C2410_SUBSRCPND);
  45. submsk = __raw_readl(S3C2410_INTSUBMSK);
  46. subsrc &= ~submsk;
  47. subsrc >>= 11;
  48. subsrc &= 3;
  49. if (subsrc != 0) {
  50. if (subsrc & 1) {
  51. mydesc = irq_desc + IRQ_S3C2440_CAM_C;
  52. desc_handle_irq(IRQ_S3C2440_CAM_C, mydesc);
  53. }
  54. if (subsrc & 2) {
  55. mydesc = irq_desc + IRQ_S3C2440_CAM_P;
  56. desc_handle_irq(IRQ_S3C2440_CAM_P, mydesc);
  57. }
  58. }
  59. }
  60. #define INTMSK_CAM (1UL << (IRQ_CAM - IRQ_EINT0))
  61. static void
  62. s3c_irq_cam_mask(unsigned int irqno)
  63. {
  64. s3c_irqsub_mask(irqno, INTMSK_CAM, 3<<11);
  65. }
  66. static void
  67. s3c_irq_cam_unmask(unsigned int irqno)
  68. {
  69. s3c_irqsub_unmask(irqno, INTMSK_CAM);
  70. }
  71. static void
  72. s3c_irq_cam_ack(unsigned int irqno)
  73. {
  74. s3c_irqsub_maskack(irqno, INTMSK_CAM, 3<<11);
  75. }
  76. static struct irq_chip s3c_irq_cam = {
  77. .mask = s3c_irq_cam_mask,
  78. .unmask = s3c_irq_cam_unmask,
  79. .ack = s3c_irq_cam_ack,
  80. };
  81. static int s3c244x_irq_add(struct sys_device *sysdev)
  82. {
  83. unsigned int irqno;
  84. set_irq_chip(IRQ_NFCON, &s3c_irq_level_chip);
  85. set_irq_handler(IRQ_NFCON, handle_level_irq);
  86. set_irq_flags(IRQ_NFCON, IRQF_VALID);
  87. /* add chained handler for camera */
  88. set_irq_chip(IRQ_CAM, &s3c_irq_level_chip);
  89. set_irq_handler(IRQ_CAM, handle_level_irq);
  90. set_irq_chained_handler(IRQ_CAM, s3c_irq_demux_cam);
  91. for (irqno = IRQ_S3C2440_CAM_C; irqno <= IRQ_S3C2440_CAM_P; irqno++) {
  92. set_irq_chip(irqno, &s3c_irq_cam);
  93. set_irq_handler(irqno, handle_level_irq);
  94. set_irq_flags(irqno, IRQF_VALID);
  95. }
  96. return 0;
  97. }
  98. static struct sysdev_driver s3c2440_irq_driver = {
  99. .add = s3c244x_irq_add,
  100. .suspend = s3c24xx_irq_suspend,
  101. .resume = s3c24xx_irq_resume,
  102. };
  103. static int s3c2440_irq_init(void)
  104. {
  105. return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_irq_driver);
  106. }
  107. arch_initcall(s3c2440_irq_init);
  108. static struct sysdev_driver s3c2442_irq_driver = {
  109. .add = s3c244x_irq_add,
  110. .suspend = s3c24xx_irq_suspend,
  111. .resume = s3c24xx_irq_resume,
  112. };
  113. static int s3c2442_irq_init(void)
  114. {
  115. return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_irq_driver);
  116. }
  117. arch_initcall(s3c2442_irq_init);