arch/arm/mach-imx/mx1-camera-fiq.S

   1 /*
   2  *  Copyright (C) 2008 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
   3  *
   4  *  Based on linux/arch/arm/lib/floppydma.S
   5  *      Copyright (C) 1995, 1996 Russell King
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/linkage.h>
  12 #include <asm/assembler.h>
  13
  14                 .text
  15                 .global mx1_camera_sof_fiq_end
  16                 .global mx1_camera_sof_fiq_start
  17 mx1_camera_sof_fiq_start:
  18                 @ enable dma
  19                 ldr     r12, [r9]
  20                 orr     r12, r12, #0x00000001
  21                 str     r12, [r9]
  22                 @ unmask DMA interrupt
  23                 ldr     r12, [r8]
  24                 bic     r12, r12, r13
  25                 str     r12, [r8]
  26                 @ disable SOF interrupt
  27                 ldr     r12, [r10]
  28                 bic     r12, r12, #0x00010000
  29                 str     r12, [r10]
  30                 @ clear SOF flag
  31                 mov     r12, #0x00010000
  32                 str     r12, [r11]
  33                 @ return from FIQ
  34                 subs    pc, lr, #4
  35 mx1_camera_sof_fiq_end: