release/src-rt-6.x/linux/linux-2.6/arch/sh/boards/renesas/r7780rp/irq.c

   1 /*
   2  * Renesas Solutions Highlander R7780RP-1 Support.
   3  *
   4  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
   5  * Copyright (C) 2006  Paul Mundt
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file "COPYING" in the main directory of this archive
   9  * for more details.
  10  */
  11 #include <linux/init.h>
  12 #include <linux/irq.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/io.h>
  15 #include <asm/r7780rp.h>
  16
  17 #ifdef CONFIG_SH_R7780RP
  18 static int mask_pos[] = {15, 14, 13, 12, 11, 10, 9, 8, 7, 5, 6, 4, 0, 1, 2, 0};
  19 #elif defined(CONFIG_SH_R7780MP)
  20 static int mask_pos[] = {12, 11, 9, 14, 15, 8, 13, 6, 5, 4, 3, 2, 0, 0, 1, 0};
  21 #elif defined(CONFIG_SH_R7785RP)
  22 static int mask_pos[] = {2, 11, 2, 2, 2, 2, 9, 8, 7, 5, 10, 2, 2, 2, 2, 2};
  23 #endif
  24
  25 static void enable_r7780rp_irq(unsigned int irq)
  26 {
  27         /* Set priority in IPR back to original value */
  28         ctrl_outw(ctrl_inw(IRLCNTR1) | (1 << mask_pos[irq]), IRLCNTR1);
  29 }
  30
  31 static void disable_r7780rp_irq(unsigned int irq)
  32 {
  33         /* Set the priority in IPR to 0 */
  34         ctrl_outw(ctrl_inw(IRLCNTR1) & (0xffff ^ (1 << mask_pos[irq])),
  35                   IRLCNTR1);
  36 }
  37
  38 static struct irq_chip r7780rp_irq_chip __read_mostly = {
  39         .name           = "R7780RP",
  40         .mask           = disable_r7780rp_irq,
  41         .unmask         = enable_r7780rp_irq,
  42         .mask_ack       = disable_r7780rp_irq,
  43 };
  44
  45 void make_r7780rp_irq(unsigned int irq)
  46 {
  47         disable_irq_nosync(irq);
  48         set_irq_chip_and_handler_name(irq, &r7780rp_irq_chip,
  49                                       handle_level_irq, "level");
  50         enable_r7780rp_irq(irq);
  51 }