include/linux/irqchip/spear-shirq.h

   1 /*
   2  * SPEAr platform shared irq layer header file
   3  *
   4  * Copyright (C) 2009-2012 ST Microelectronics
   5  * Viresh Kumar <viresh.linux@gmail.com>
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2. This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #ifndef __SPEAR_SHIRQ_H
  13 #define __SPEAR_SHIRQ_H
  14
  15 #include <linux/irq.h>
  16 #include <linux/types.h>
  17
  18 /*
  19  * struct shirq_regs: shared irq register configuration
  20  *
  21  * enb_reg: enable register offset
  22  * reset_to_enb: val 1 indicates, we need to clear bit for enabling interrupt
  23  * status_reg: status register offset
  24  * status_reg_mask: status register valid mask
  25  * clear_reg: clear register offset
  26  * reset_to_clear: val 1 indicates, we need to clear bit for clearing interrupt
  27  */
  28 struct shirq_regs {
  29         u32 enb_reg;
  30         u32 reset_to_enb;
  31         u32 status_reg;
  32         u32 clear_reg;
  33         u32 reset_to_clear;
  34 };
  35
  36 /*
  37  * struct spear_shirq: shared irq structure
  38  *
  39  * irq: hardware irq number
  40  * irq_base: base irq in linux domain
  41  * irq_nr: no. of shared interrupts in a particular block
  42  * irq_bit_off: starting bit offset in the status register
  43  * invalid_irq: irq group is currently disabled
  44  * base: base address of shared irq register
  45  * regs: register configuration for shared irq block
  46  */
  47 struct spear_shirq {
  48         u32 irq;
  49         u32 irq_base;
  50         u32 irq_nr;
  51         u32 irq_bit_off;
  52         int invalid_irq;
  53         void __iomem *base;
  54         struct shirq_regs regs;
  55 };
  56
  57 int __init spear300_shirq_of_init(struct device_node *np,
  58                 struct device_node *parent);
  59 int __init spear310_shirq_of_init(struct device_node *np,
  60                 struct device_node *parent);
  61 int __init spear320_shirq_of_init(struct device_node *np,
  62                 struct device_node *parent);
  63
  64 #endif /* __SPEAR_SHIRQ_H */