2 * linux/arch/sh/boards/renesas/hs7751rvoip/irq.c
4 * Copyright (C) 2000 Kazumoto Kojima
6 * Renesas Technology Sales HS7751RVoIP Support.
8 * Modified for HS7751RVoIP by
9 * Atom Create Engineering Co., Ltd. 2002.
10 * Lineo uSolutions, Inc. 2003.
13 #include <linux/init.h>
14 #include <linux/irq.h>
15 #include <linux/interrupt.h>
18 #include <asm/hs7751rvoip.h>
20 static int mask_pos[] = {8, 9, 10, 11, 12, 13, 0, 1, 2, 3, 4, 5, 6, 7};
22 static void enable_hs7751rvoip_irq(unsigned int irq);
23 static void disable_hs7751rvoip_irq(unsigned int irq);
25 /* shutdown is same as "disable" */
26 #define shutdown_hs7751rvoip_irq disable_hs7751rvoip_irq
28 static void ack_hs7751rvoip_irq(unsigned int irq);
29 static void end_hs7751rvoip_irq(unsigned int irq);
31 static unsigned int startup_hs7751rvoip_irq(unsigned int irq)
33 enable_hs7751rvoip_irq(irq);
34 return 0; /* never anything pending */
37 static void disable_hs7751rvoip_irq(unsigned int irq)
40 unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]);
42 /* Set the priority in IPR to 0 */
43 val = ctrl_inw(IRLCNTR3);
45 ctrl_outw(val, IRLCNTR3);
48 static void enable_hs7751rvoip_irq(unsigned int irq)
51 unsigned short value = (0x0001 << mask_pos[irq]);
53 /* Set priority in IPR back to original value */
54 val = ctrl_inw(IRLCNTR3);
56 ctrl_outw(val, IRLCNTR3);
59 static void ack_hs7751rvoip_irq(unsigned int irq)
61 disable_hs7751rvoip_irq(irq);
64 static void end_hs7751rvoip_irq(unsigned int irq)
66 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
67 enable_hs7751rvoip_irq(irq);
70 static struct hw_interrupt_type hs7751rvoip_irq_type = {
71 .typename = "HS7751RVoIP IRQ",
72 .startup = startup_hs7751rvoip_irq,
73 .shutdown = shutdown_hs7751rvoip_irq,
74 .enable = enable_hs7751rvoip_irq,
75 .disable = disable_hs7751rvoip_irq,
76 .ack = ack_hs7751rvoip_irq,
77 .end = end_hs7751rvoip_irq,
80 static void make_hs7751rvoip_irq(unsigned int irq)
82 disable_irq_nosync(irq);
83 irq_desc[irq].chip = &hs7751rvoip_irq_type;
84 disable_hs7751rvoip_irq(irq);
88 * Initialize IRQ setting
90 void __init init_hs7751rvoip_IRQ(void)
98 * IRL4=Ringing Detection
102 * IRL8=USB Communication
103 * IRL9=USB Connection
109 ctrl_outw(0x9876, IRLCNTR1);
110 ctrl_outw(0xdcba, IRLCNTR2);
111 ctrl_outw(0x0050, IRLCNTR4);
112 ctrl_outw(0x4321, IRLCNTR5);
115 make_hs7751rvoip_irq(i);