arch/powerpc/include/asm/qe_ic.h

   1 /*
   2  * Copyright (C) 2006 Freescale Semiconductor, Inc. All rights reserved.
   3  *
   4  * Authors:     Shlomi Gridish <gridish@freescale.com>
   5  *              Li Yang <leoli@freescale.com>
   6  *
   7  * Description:
   8  * QE IC external definitions and structure.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15 #ifndef _ASM_POWERPC_QE_IC_H
  16 #define _ASM_POWERPC_QE_IC_H
  17
  18 #include <linux/irq.h>
  19
  20 struct device_node;
  21 struct qe_ic;
  22
  23 #define NUM_OF_QE_IC_GROUPS     6
  24
  25 /* Flags when we init the QE IC */
  26 #define QE_IC_SPREADMODE_GRP_W                  0x00000001
  27 #define QE_IC_SPREADMODE_GRP_X                  0x00000002
  28 #define QE_IC_SPREADMODE_GRP_Y                  0x00000004
  29 #define QE_IC_SPREADMODE_GRP_Z                  0x00000008
  30 #define QE_IC_SPREADMODE_GRP_RISCA              0x00000010
  31 #define QE_IC_SPREADMODE_GRP_RISCB              0x00000020
  32
  33 #define QE_IC_LOW_SIGNAL                        0x00000100
  34 #define QE_IC_HIGH_SIGNAL                       0x00000200
  35
  36 #define QE_IC_GRP_W_PRI0_DEST_SIGNAL_HIGH       0x00001000
  37 #define QE_IC_GRP_W_PRI1_DEST_SIGNAL_HIGH       0x00002000
  38 #define QE_IC_GRP_X_PRI0_DEST_SIGNAL_HIGH       0x00004000
  39 #define QE_IC_GRP_X_PRI1_DEST_SIGNAL_HIGH       0x00008000
  40 #define QE_IC_GRP_Y_PRI0_DEST_SIGNAL_HIGH       0x00010000
  41 #define QE_IC_GRP_Y_PRI1_DEST_SIGNAL_HIGH       0x00020000
  42 #define QE_IC_GRP_Z_PRI0_DEST_SIGNAL_HIGH       0x00040000
  43 #define QE_IC_GRP_Z_PRI1_DEST_SIGNAL_HIGH       0x00080000
  44 #define QE_IC_GRP_RISCA_PRI0_DEST_SIGNAL_HIGH   0x00100000
  45 #define QE_IC_GRP_RISCA_PRI1_DEST_SIGNAL_HIGH   0x00200000
  46 #define QE_IC_GRP_RISCB_PRI0_DEST_SIGNAL_HIGH   0x00400000
  47 #define QE_IC_GRP_RISCB_PRI1_DEST_SIGNAL_HIGH   0x00800000
  48 #define QE_IC_GRP_W_DEST_SIGNAL_SHIFT           (12)
  49
  50 /* QE interrupt sources groups */
  51 enum qe_ic_grp_id {
  52         QE_IC_GRP_W = 0,        /* QE interrupt controller group W */
  53         QE_IC_GRP_X,            /* QE interrupt controller group X */
  54         QE_IC_GRP_Y,            /* QE interrupt controller group Y */
  55         QE_IC_GRP_Z,            /* QE interrupt controller group Z */
  56         QE_IC_GRP_RISCA,        /* QE interrupt controller RISC group A */
  57         QE_IC_GRP_RISCB         /* QE interrupt controller RISC group B */
  58 };
  59
  60 #ifdef CONFIG_QUICC_ENGINE
  61 void qe_ic_init(struct device_node *node, unsigned int flags,
  62                 void (*low_handler)(struct irq_desc *desc),
  63                 void (*high_handler)(struct irq_desc *desc));
  64 unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic);
  65 unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic);
  66 #else
  67 static inline void qe_ic_init(struct device_node *node, unsigned int flags,
  68                 void (*low_handler)(struct irq_desc *desc),
  69                 void (*high_handler)(struct irq_desc *desc))
  70 {}
  71 static inline unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic)
  72 { return 0; }
  73 static inline unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic)
  74 { return 0; }
  75 #endif /* CONFIG_QUICC_ENGINE */
  76
  77 void qe_ic_set_highest_priority(unsigned int virq, int high);
  78 int qe_ic_set_priority(unsigned int virq, unsigned int priority);
  79 int qe_ic_set_high_priority(unsigned int virq, unsigned int priority, int high);
  80
  81 static inline void qe_ic_cascade_low_ipic(struct irq_desc *desc)
  82 {
  83         struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
  84         unsigned int cascade_irq = qe_ic_get_low_irq(qe_ic);
  85
  86         if (cascade_irq != NO_IRQ)
  87                 generic_handle_irq(cascade_irq);
  88 }
  89
  90 static inline void qe_ic_cascade_high_ipic(struct irq_desc *desc)
  91 {
  92         struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
  93         unsigned int cascade_irq = qe_ic_get_high_irq(qe_ic);
  94
  95         if (cascade_irq != NO_IRQ)
  96                 generic_handle_irq(cascade_irq);
  97 }
  98
  99 static inline void qe_ic_cascade_low_mpic(struct irq_desc *desc)
 100 {
 101         struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
 102         unsigned int cascade_irq = qe_ic_get_low_irq(qe_ic);
 103         struct irq_chip *chip = irq_desc_get_chip(desc);
 104
 105         if (cascade_irq != NO_IRQ)
 106                 generic_handle_irq(cascade_irq);
 107
 108         chip->irq_eoi(&desc->irq_data);
 109 }
 110
 111 static inline void qe_ic_cascade_high_mpic(struct irq_desc *desc)
 112 {
 113         struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
 114         unsigned int cascade_irq = qe_ic_get_high_irq(qe_ic);
 115         struct irq_chip *chip = irq_desc_get_chip(desc);
 116
 117         if (cascade_irq != NO_IRQ)
 118                 generic_handle_irq(cascade_irq);
 119
 120         chip->irq_eoi(&desc->irq_data);
 121 }
 122
 123 static inline void qe_ic_cascade_muxed_mpic(struct irq_desc *desc)
 124 {
 125         struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
 126         unsigned int cascade_irq;
 127         struct irq_chip *chip = irq_desc_get_chip(desc);
 128
 129         cascade_irq = qe_ic_get_high_irq(qe_ic);
 130         if (cascade_irq == NO_IRQ)
 131                 cascade_irq = qe_ic_get_low_irq(qe_ic);
 132
 133         if (cascade_irq != NO_IRQ)
 134                 generic_handle_irq(cascade_irq);
 135
 136         chip->irq_eoi(&desc->irq_data);
 137 }
 138
 139 #endif /* _ASM_POWERPC_QE_IC_H */