| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * linux/arch/sh/boards/renesas/hs7751rvoip/irq.c |
| 3 | * |
| 4 | * Copyright (C) 2000 Kazumoto Kojima |
| 5 | * |
| 6 | * Renesas Technology Sales HS7751RVoIP Support. |
| 7 | * |
| 8 | * Modified for HS7751RVoIP by |
| 9 | * Atom Create Engineering Co., Ltd. 2002. |
| 10 | * Lineo uSolutions, Inc. 2003. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/config.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/irq.h> |
| 16 | #include <asm/io.h> |
| 17 | #include <asm/irq.h> |
| 18 | #include <asm/hs7751rvoip/hs7751rvoip.h> |
| 19 | |
| 20 | static int mask_pos[] = {8, 9, 10, 11, 12, 13, 0, 1, 2, 3, 4, 5, 6, 7}; |
| 21 | |
| 22 | static void enable_hs7751rvoip_irq(unsigned int irq); |
| 23 | static void disable_hs7751rvoip_irq(unsigned int irq); |
| 24 | |
| 25 | /* shutdown is same as "disable" */ |
| 26 | #define shutdown_hs7751rvoip_irq disable_hs7751rvoip_irq |
| 27 | |
| 28 | static void ack_hs7751rvoip_irq(unsigned int irq); |
| 29 | static void end_hs7751rvoip_irq(unsigned int irq); |
| 30 | |
| 31 | static unsigned int startup_hs7751rvoip_irq(unsigned int irq) |
| 32 | { |
| 33 | enable_hs7751rvoip_irq(irq); |
| 34 | return 0; /* never anything pending */ |
| 35 | } |
| 36 | |
| 37 | static void disable_hs7751rvoip_irq(unsigned int irq) |
| 38 | { |
| 39 | unsigned long flags; |
| 40 | unsigned short val; |
| 41 | unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]); |
| 42 | |
| 43 | /* Set the priority in IPR to 0 */ |
| 44 | local_irq_save(flags); |
| 45 | val = ctrl_inw(IRLCNTR3); |
| 46 | val &= mask; |
| 47 | ctrl_outw(val, IRLCNTR3); |
| 48 | local_irq_restore(flags); |
| 49 | } |
| 50 | |
| 51 | static void enable_hs7751rvoip_irq(unsigned int irq) |
| 52 | { |
| 53 | unsigned long flags; |
| 54 | unsigned short val; |
| 55 | unsigned short value = (0x0001 << mask_pos[irq]); |
| 56 | |
| 57 | /* Set priority in IPR back to original value */ |
| 58 | local_irq_save(flags); |
| 59 | val = ctrl_inw(IRLCNTR3); |
| 60 | val |= value; |
| 61 | ctrl_outw(val, IRLCNTR3); |
| 62 | local_irq_restore(flags); |
| 63 | } |
| 64 | |
| 65 | static void ack_hs7751rvoip_irq(unsigned int irq) |
| 66 | { |
| 67 | disable_hs7751rvoip_irq(irq); |
| 68 | } |
| 69 | |
| 70 | static void end_hs7751rvoip_irq(unsigned int irq) |
| 71 | { |
| 72 | if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) |
| 73 | enable_hs7751rvoip_irq(irq); |
| 74 | } |
| 75 | |
| 76 | static struct hw_interrupt_type hs7751rvoip_irq_type = { |
| 77 | "HS7751RVoIP IRQ", |
| 78 | startup_hs7751rvoip_irq, |
| 79 | shutdown_hs7751rvoip_irq, |
| 80 | enable_hs7751rvoip_irq, |
| 81 | disable_hs7751rvoip_irq, |
| 82 | ack_hs7751rvoip_irq, |
| 83 | end_hs7751rvoip_irq, |
| 84 | }; |
| 85 | |
| 86 | static void make_hs7751rvoip_irq(unsigned int irq) |
| 87 | { |
| 88 | disable_irq_nosync(irq); |
| 89 | irq_desc[irq].handler = &hs7751rvoip_irq_type; |
| 90 | disable_hs7751rvoip_irq(irq); |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Initialize IRQ setting |
| 95 | */ |
| 96 | void __init init_hs7751rvoip_IRQ(void) |
| 97 | { |
| 98 | int i; |
| 99 | |
| 100 | /* IRL0=ON HOOK1 |
| 101 | * IRL1=OFF HOOK1 |
| 102 | * IRL2=ON HOOK2 |
| 103 | * IRL3=OFF HOOK2 |
| 104 | * IRL4=Ringing Detection |
| 105 | * IRL5=CODEC |
| 106 | * IRL6=Ethernet |
| 107 | * IRL7=Ethernet Hub |
| 108 | * IRL8=USB Communication |
| 109 | * IRL9=USB Connection |
| 110 | * IRL10=USB DMA |
| 111 | * IRL11=CF Card |
| 112 | * IRL12=PCMCIA |
| 113 | * IRL13=PCI Slot |
| 114 | */ |
| 115 | ctrl_outw(0x9876, IRLCNTR1); |
| 116 | ctrl_outw(0xdcba, IRLCNTR2); |
| 117 | ctrl_outw(0x0050, IRLCNTR4); |
| 118 | ctrl_outw(0x4321, IRLCNTR5); |
| 119 | |
| 120 | for (i=0; i<14; i++) |
| 121 | make_hs7751rvoip_irq(i); |
| 122 | } |