116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/*
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* linux/arch/sh/boards/renesas/hs7751rvoip/irq.c
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*
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* Copyright (C) 2000 Kazumoto Kojima
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*
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* Renesas Technology Sales HS7751RVoIP Support.
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*
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* Modified for HS7751RVoIP by
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* Atom Create Engineering Co., Ltd. 2002.
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* Lineo uSolutions, Inc. 2003.
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*/
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/hs7751rvoip.h>
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static int mask_pos[] = {8, 9, 10, 11, 12, 13, 0, 1, 2, 3, 4, 5, 6, 7};
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static void enable_hs7751rvoip_irq(unsigned int irq);
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static void disable_hs7751rvoip_irq(unsigned int irq);
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/* shutdown is same as "disable" */
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#define shutdown_hs7751rvoip_irq disable_hs7751rvoip_irq
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static void ack_hs7751rvoip_irq(unsigned int irq);
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static void end_hs7751rvoip_irq(unsigned int irq);
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static unsigned int startup_hs7751rvoip_irq(unsigned int irq)
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{
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enable_hs7751rvoip_irq(irq);
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return 0; /* never anything pending */
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}
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static void disable_hs7751rvoip_irq(unsigned int irq)
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{
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unsigned short val;
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unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]);
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/* Set the priority in IPR to 0 */
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val = ctrl_inw(IRLCNTR3);
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val &= mask;
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ctrl_outw(val, IRLCNTR3);
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}
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static void enable_hs7751rvoip_irq(unsigned int irq)
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{
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unsigned short val;
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unsigned short value = (0x0001 << mask_pos[irq]);
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/* Set priority in IPR back to original value */
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val = ctrl_inw(IRLCNTR3);
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val |= value;
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ctrl_outw(val, IRLCNTR3);
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}
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static void ack_hs7751rvoip_irq(unsigned int irq)
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{
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disable_hs7751rvoip_irq(irq);
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}
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static void end_hs7751rvoip_irq(unsigned int irq)
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{
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if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
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enable_hs7751rvoip_irq(irq);
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}
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static struct hw_interrupt_type hs7751rvoip_irq_type = {
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.typename = "HS7751RVoIP IRQ",
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.startup = startup_hs7751rvoip_irq,
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.shutdown = shutdown_hs7751rvoip_irq,
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.enable = enable_hs7751rvoip_irq,
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.disable = disable_hs7751rvoip_irq,
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.ack = ack_hs7751rvoip_irq,
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.end = end_hs7751rvoip_irq,
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};
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static void make_hs7751rvoip_irq(unsigned int irq)
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{
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disable_irq_nosync(irq);
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irq_desc[irq].chip = &hs7751rvoip_irq_type;
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disable_hs7751rvoip_irq(irq);
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}
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/*
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* Initialize IRQ setting
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*/
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void __init init_hs7751rvoip_IRQ(void)
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{
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int i;
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/* IRL0=ON HOOK1
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* IRL1=OFF HOOK1
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* IRL2=ON HOOK2
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* IRL3=OFF HOOK2
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* IRL4=Ringing Detection
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* IRL5=CODEC
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* IRL6=Ethernet
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* IRL7=Ethernet Hub
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* IRL8=USB Communication
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* IRL9=USB Connection
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* IRL10=USB DMA
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* IRL11=CF Card
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* IRL12=PCMCIA
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* IRL13=PCI Slot
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*/
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ctrl_outw(0x9876, IRLCNTR1);
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ctrl_outw(0xdcba, IRLCNTR2);
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ctrl_outw(0x0050, IRLCNTR4);
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ctrl_outw(0x4321, IRLCNTR5);
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for (i=0; i<14; i++)
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make_hs7751rvoip_irq(i);
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}
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