drivers/staging/meilhaus/me0600_ext_irq.h

   1 /**
   2  * @file me0600_ext_irq.h
   3  *
   4  * @brief ME-630 external interrupt implementation.
   5  * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
   6  * @author Guenter Gebhardt
   7  */
   8
   9 #ifndef _ME0600_EXT_IRQ_H_
  10 #define _ME0600_EXT_IRQ_H_
  11
  12 #include <linux/sched.h>
  13
  14 #include "mesubdevice.h"
  15 #include "meslock.h"
  16
  17 #ifdef __KERNEL__
  18
  19 /**
  20  * @brief The ME-630 external interrupt subdevice class.
  21  */
  22 typedef struct me0600_ext_irq_subdevice {
  23         /* Inheritance */
  24         me_subdevice_t base;                    /**< The subdevice base class. */
  25
  26         /* Attributes */
  27         spinlock_t subdevice_lock;              /**< Spin lock to protect the subdevice from concurrent access. */
  28         spinlock_t *intcsr_lock;                /**< Spin lock to protect #intcsr. */
  29
  30         wait_queue_head_t wait_queue;           /**< Queue to put on threads waiting for an interrupt. */
  31
  32         int irq;                                /**< The irq number assigned by PCI BIOS. */
  33         int rised;                              /**< If true an interrupt has occured. */
  34         unsigned int n;                         /**< The number of interrupt since the driver was loaded. */
  35         unsigned int lintno;                    /**< The number of the local PCI interrupt. */
  36
  37         uint32_t intcsr;                        /**< The PLX interrupt control and status register. */
  38         uint32_t reset_reg;                     /**< The control register. */
  39 } me0600_ext_irq_subdevice_t;
  40
  41 /**
  42  * @brief The constructor to generate a ME-630 external interrupt instance.
  43  *
  44  * @param plx_reg_base The register base address of the PLX chip as returned by the PCI BIOS.
  45  * @param me0600_reg_base The register base address of the ME-630 device as returned by the PCI BIOS.
  46  * @param irq The irq assigned by the PCI BIOS.
  47  *
  48  * @return Pointer to new instance on success.\n
  49  * NULL on error.
  50  */
  51 me0600_ext_irq_subdevice_t *me0600_ext_irq_constructor(uint32_t plx_reg_base,
  52                                                        uint32_t me0600_reg_base,
  53                                                        spinlock_t * intcsr_lock,
  54                                                        unsigned int ext_irq_idx,
  55                                                        int irq);
  56
  57 #endif
  58 #endif