arch/arm/plat-spear/include/plat/shirq.h

   1 /*
   2  * arch/arm/plat-spear/include/plat/shirq.h
   3  *
   4  * SPEAr platform shared irq layer header file
   5  *
   6  * Copyright (C) 2009 ST Microelectronics
   7  * Viresh Kumar <viresh.linux@gmail.com>
   8  *
   9  * This file is licensed under the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12  */
  13
  14 #ifndef __PLAT_SHIRQ_H
  15 #define __PLAT_SHIRQ_H
  16
  17 #include <linux/irq.h>
  18 #include <linux/types.h>
  19
  20 /*
  21  * struct shirq_dev_config: shared irq device configuration
  22  *
  23  * virq: virtual irq number of device
  24  * enb_mask: enable mask of device
  25  * status_mask: status mask of device
  26  * clear_mask: clear mask of device
  27  */
  28 struct shirq_dev_config {
  29         u32 virq;
  30         u32 enb_mask;
  31         u32 status_mask;
  32         u32 clear_mask;
  33 };
  34
  35 /*
  36  * struct shirq_regs: shared irq register configuration
  37  *
  38  * base: base address of shared irq register
  39  * enb_reg: enable register offset
  40  * reset_to_enb: val 1 indicates, we need to clear bit for enabling interrupt
  41  * status_reg: status register offset
  42  * status_reg_mask: status register valid mask
  43  * clear_reg: clear register offset
  44  * reset_to_clear: val 1 indicates, we need to clear bit for clearing interrupt
  45  */
  46 struct shirq_regs {
  47         void __iomem *base;
  48         u32 enb_reg;
  49         u32 reset_to_enb;
  50         u32 status_reg;
  51         u32 status_reg_mask;
  52         u32 clear_reg;
  53         u32 reset_to_clear;
  54 };
  55
  56 /*
  57  * struct spear_shirq: shared irq structure
  58  *
  59  * irq: hardware irq number
  60  * dev_config: array of device config structures which are using "irq" line
  61  * dev_count: size of dev_config array
  62  * regs: register configuration for shared irq block
  63  */
  64 struct spear_shirq {
  65         u32 irq;
  66         struct shirq_dev_config *dev_config;
  67         u32 dev_count;
  68         struct shirq_regs regs;
  69 };
  70
  71 int spear_shirq_register(struct spear_shirq *shirq);
  72
  73 #endif /* __PLAT_SHIRQ_H */