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135 lines
2.9 KiB
135 lines
2.9 KiB
/*
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* linux/arch/sh/boards/renesas/rts7751r2d/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 RTS7751R2D Support.
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*
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* Modified for RTS7751R2D by
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* Atom Create Engineering Co., Ltd. 2002.
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*/
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#include <linux/config.h>
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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/rts7751r2d/rts7751r2d.h>
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#if defined(CONFIG_RTS7751R2D_REV11)
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static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0};
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#else
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static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0};
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#endif
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extern int voyagergx_irq_demux(int irq);
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extern void setup_voyagergx_irq(void);
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static void enable_rts7751r2d_irq(unsigned int irq);
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static void disable_rts7751r2d_irq(unsigned int irq);
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/* shutdown is same as "disable" */
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#define shutdown_rts7751r2d_irq disable_rts7751r2d_irq
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static void ack_rts7751r2d_irq(unsigned int irq);
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static void end_rts7751r2d_irq(unsigned int irq);
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static unsigned int startup_rts7751r2d_irq(unsigned int irq)
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{
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enable_rts7751r2d_irq(irq);
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return 0; /* never anything pending */
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}
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static void disable_rts7751r2d_irq(unsigned int irq)
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{
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unsigned long flags;
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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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local_irq_save(flags);
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val = ctrl_inw(IRLCNTR1);
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val &= mask;
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ctrl_outw(val, IRLCNTR1);
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local_irq_restore(flags);
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}
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static void enable_rts7751r2d_irq(unsigned int irq)
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{
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unsigned long flags;
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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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local_irq_save(flags);
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val = ctrl_inw(IRLCNTR1);
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val |= value;
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ctrl_outw(val, IRLCNTR1);
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local_irq_restore(flags);
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}
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int rts7751r2d_irq_demux(int irq)
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{
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int demux_irq;
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demux_irq = voyagergx_irq_demux(irq);
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return demux_irq;
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}
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static void ack_rts7751r2d_irq(unsigned int irq)
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{
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disable_rts7751r2d_irq(irq);
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}
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static void end_rts7751r2d_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_rts7751r2d_irq(irq);
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}
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static struct hw_interrupt_type rts7751r2d_irq_type = {
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.typename = "RTS7751R2D IRQ",
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.startup = startup_rts7751r2d_irq,
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.shutdown = shutdown_rts7751r2d_irq,
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.enable = enable_rts7751r2d_irq,
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.disable = disable_rts7751r2d_irq,
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.ack = ack_rts7751r2d_irq,
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.end = end_rts7751r2d_irq,
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};
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static void make_rts7751r2d_irq(unsigned int irq)
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{
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disable_irq_nosync(irq);
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irq_desc[irq].handler = &rts7751r2d_irq_type;
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disable_rts7751r2d_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_rts7751r2d_IRQ(void)
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{
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int i;
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/* IRL0=KEY Input
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* IRL1=Ethernet
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* IRL2=CF Card
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* IRL3=CF Card Insert
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* IRL4=PCMCIA
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* IRL5=VOYAGER
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* IRL6=RTC Alarm
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* IRL7=RTC Timer
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* IRL8=SD Card
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* IRL9=PCI Slot #1
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* IRL10=PCI Slot #2
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* IRL11=Extention #0
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* IRL12=Extention #1
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* IRL13=Extention #2
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* IRL14=Extention #3
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*/
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for (i=0; i<15; i++)
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make_rts7751r2d_irq(i);
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setup_voyagergx_irq();
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}
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