arch/sh/boards/mach-sdk7786/irq.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SDK7786 FPGA IRQ Controller Support.
   4  *
   5  * Copyright (C) 2010  Matt Fleming
   6  * Copyright (C) 2010  Paul Mundt
   7  */
   8 #include <linux/irq.h>
   9 #include <mach/fpga.h>
  10 #include <mach/irq.h>
  11
  12 enum {
  13         ATA_IRQ_BIT             = 1,
  14         SPI_BUSY_BIT            = 2,
  15         LIRQ5_BIT               = 3,
  16         LIRQ6_BIT               = 4,
  17         LIRQ7_BIT               = 5,
  18         LIRQ8_BIT               = 6,
  19         KEY_IRQ_BIT             = 7,
  20         PEN_IRQ_BIT             = 8,
  21         ETH_IRQ_BIT             = 9,
  22         RTC_ALARM_BIT           = 10,
  23         CRYSTAL_FAIL_BIT        = 12,
  24         ETH_PME_BIT             = 14,
  25 };
  26
  27 void __init sdk7786_init_irq(void)
  28 {
  29         unsigned int tmp;
  30
  31         /* Enable priority encoding for all IRLs */
  32         fpga_write_reg(fpga_read_reg(INTMSR) | 0x0303, INTMSR);
  33
  34         /* Clear FPGA interrupt status registers */
  35         fpga_write_reg(0x0000, INTASR);
  36         fpga_write_reg(0x0000, INTBSR);
  37
  38         /* Unmask FPGA interrupts */
  39         tmp = fpga_read_reg(INTAMR);
  40         tmp &= ~(1 << ETH_IRQ_BIT);
  41         fpga_write_reg(tmp, INTAMR);
  42
  43         plat_irq_setup_pins(IRQ_MODE_IRL7654_MASK);
  44         plat_irq_setup_pins(IRQ_MODE_IRL3210_MASK);
  45 }