Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/sh/boards/renesas/rts7751r2d/irq.c |
| 3 | * |
| 4 | * Copyright (C) 2000 Kazumoto Kojima |
| 5 | * |
| 6 | * Renesas Technology Sales RTS7751R2D Support. |
| 7 | * |
| 8 | * Modified for RTS7751R2D by |
| 9 | * Atom Create Engineering Co., Ltd. 2002. |
| 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/init.h> |
| 13 | #include <linux/irq.h> |
| 14 | #include <asm/io.h> |
| 15 | #include <asm/irq.h> |
| 16 | #include <asm/rts7751r2d/rts7751r2d.h> |
| 17 | |
| 18 | #if defined(CONFIG_RTS7751R2D_REV11) |
| 19 | static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0}; |
| 20 | #else |
| 21 | static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0}; |
| 22 | #endif |
| 23 | |
| 24 | extern int voyagergx_irq_demux(int irq); |
| 25 | extern void setup_voyagergx_irq(void); |
| 26 | |
| 27 | static void enable_rts7751r2d_irq(unsigned int irq); |
| 28 | static void disable_rts7751r2d_irq(unsigned int irq); |
| 29 | |
| 30 | /* shutdown is same as "disable" */ |
| 31 | #define shutdown_rts7751r2d_irq disable_rts7751r2d_irq |
| 32 | |
| 33 | static void ack_rts7751r2d_irq(unsigned int irq); |
| 34 | static void end_rts7751r2d_irq(unsigned int irq); |
| 35 | |
| 36 | static unsigned int startup_rts7751r2d_irq(unsigned int irq) |
| 37 | { |
| 38 | enable_rts7751r2d_irq(irq); |
| 39 | return 0; /* never anything pending */ |
| 40 | } |
| 41 | |
| 42 | static void disable_rts7751r2d_irq(unsigned int irq) |
| 43 | { |
| 44 | unsigned long flags; |
| 45 | unsigned short val; |
| 46 | unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]); |
| 47 | |
| 48 | /* Set the priority in IPR to 0 */ |
| 49 | local_irq_save(flags); |
| 50 | val = ctrl_inw(IRLCNTR1); |
| 51 | val &= mask; |
| 52 | ctrl_outw(val, IRLCNTR1); |
| 53 | local_irq_restore(flags); |
| 54 | } |
| 55 | |
| 56 | static void enable_rts7751r2d_irq(unsigned int irq) |
| 57 | { |
| 58 | unsigned long flags; |
| 59 | unsigned short val; |
| 60 | unsigned short value = (0x0001 << mask_pos[irq]); |
| 61 | |
| 62 | /* Set priority in IPR back to original value */ |
| 63 | local_irq_save(flags); |
| 64 | val = ctrl_inw(IRLCNTR1); |
| 65 | val |= value; |
| 66 | ctrl_outw(val, IRLCNTR1); |
| 67 | local_irq_restore(flags); |
| 68 | } |
| 69 | |
| 70 | int rts7751r2d_irq_demux(int irq) |
| 71 | { |
| 72 | int demux_irq; |
| 73 | |
| 74 | demux_irq = voyagergx_irq_demux(irq); |
| 75 | return demux_irq; |
| 76 | } |
| 77 | |
| 78 | static void ack_rts7751r2d_irq(unsigned int irq) |
| 79 | { |
| 80 | disable_rts7751r2d_irq(irq); |
| 81 | } |
| 82 | |
| 83 | static void end_rts7751r2d_irq(unsigned int irq) |
| 84 | { |
| 85 | if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) |
| 86 | enable_rts7751r2d_irq(irq); |
| 87 | } |
| 88 | |
| 89 | static struct hw_interrupt_type rts7751r2d_irq_type = { |
Thomas Gleixner | 08d0fd0 | 2005-09-10 00:26:42 -0700 | [diff] [blame] | 90 | .typename = "RTS7751R2D IRQ", |
| 91 | .startup = startup_rts7751r2d_irq, |
| 92 | .shutdown = shutdown_rts7751r2d_irq, |
| 93 | .enable = enable_rts7751r2d_irq, |
| 94 | .disable = disable_rts7751r2d_irq, |
| 95 | .ack = ack_rts7751r2d_irq, |
| 96 | .end = end_rts7751r2d_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | }; |
| 98 | |
| 99 | static void make_rts7751r2d_irq(unsigned int irq) |
| 100 | { |
| 101 | disable_irq_nosync(irq); |
Ingo Molnar | d1bef4e | 2006-06-29 02:24:36 -0700 | [diff] [blame] | 102 | irq_desc[irq].chip = &rts7751r2d_irq_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | disable_rts7751r2d_irq(irq); |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Initialize IRQ setting |
| 108 | */ |
| 109 | void __init init_rts7751r2d_IRQ(void) |
| 110 | { |
| 111 | int i; |
| 112 | |
| 113 | /* IRL0=KEY Input |
| 114 | * IRL1=Ethernet |
| 115 | * IRL2=CF Card |
| 116 | * IRL3=CF Card Insert |
| 117 | * IRL4=PCMCIA |
| 118 | * IRL5=VOYAGER |
| 119 | * IRL6=RTC Alarm |
| 120 | * IRL7=RTC Timer |
| 121 | * IRL8=SD Card |
| 122 | * IRL9=PCI Slot #1 |
| 123 | * IRL10=PCI Slot #2 |
| 124 | * IRL11=Extention #0 |
| 125 | * IRL12=Extention #1 |
| 126 | * IRL13=Extention #2 |
| 127 | * IRL14=Extention #3 |
| 128 | */ |
| 129 | |
| 130 | for (i=0; i<15; i++) |
| 131 | make_rts7751r2d_irq(i); |
| 132 | |
| 133 | setup_voyagergx_irq(); |
| 134 | } |