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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/init.h> |
| 12 | #include <linux/irq.h> |
Paul Mundt | 082c44d | 2006-10-19 16:16:18 +0900 | [diff] [blame] | 13 | #include <linux/io.h> |
| 14 | #include <asm/rts7751r2d.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #if defined(CONFIG_RTS7751R2D_REV11) |
| 17 | static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0}; |
| 18 | #else |
| 19 | static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0}; |
| 20 | #endif |
| 21 | |
| 22 | extern int voyagergx_irq_demux(int irq); |
| 23 | extern void setup_voyagergx_irq(void); |
| 24 | |
| 25 | static void enable_rts7751r2d_irq(unsigned int irq); |
| 26 | static void disable_rts7751r2d_irq(unsigned int irq); |
| 27 | |
| 28 | /* shutdown is same as "disable" */ |
| 29 | #define shutdown_rts7751r2d_irq disable_rts7751r2d_irq |
| 30 | |
| 31 | static void ack_rts7751r2d_irq(unsigned int irq); |
| 32 | static void end_rts7751r2d_irq(unsigned int irq); |
| 33 | |
| 34 | static unsigned int startup_rts7751r2d_irq(unsigned int irq) |
| 35 | { |
| 36 | enable_rts7751r2d_irq(irq); |
| 37 | return 0; /* never anything pending */ |
| 38 | } |
| 39 | |
| 40 | static void disable_rts7751r2d_irq(unsigned int irq) |
| 41 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | unsigned short val; |
| 43 | unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]); |
| 44 | |
| 45 | /* Set the priority in IPR to 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | val = ctrl_inw(IRLCNTR1); |
| 47 | val &= mask; |
| 48 | ctrl_outw(val, IRLCNTR1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | } |
| 50 | |
| 51 | static void enable_rts7751r2d_irq(unsigned int irq) |
| 52 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | unsigned short val; |
| 54 | unsigned short value = (0x0001 << mask_pos[irq]); |
| 55 | |
| 56 | /* Set priority in IPR back to original value */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | val = ctrl_inw(IRLCNTR1); |
| 58 | val |= value; |
| 59 | ctrl_outw(val, IRLCNTR1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | int rts7751r2d_irq_demux(int irq) |
| 63 | { |
| 64 | int demux_irq; |
| 65 | |
| 66 | demux_irq = voyagergx_irq_demux(irq); |
| 67 | return demux_irq; |
| 68 | } |
| 69 | |
| 70 | static void ack_rts7751r2d_irq(unsigned int irq) |
| 71 | { |
| 72 | disable_rts7751r2d_irq(irq); |
| 73 | } |
| 74 | |
| 75 | static void end_rts7751r2d_irq(unsigned int irq) |
| 76 | { |
| 77 | if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) |
| 78 | enable_rts7751r2d_irq(irq); |
| 79 | } |
| 80 | |
| 81 | static struct hw_interrupt_type rts7751r2d_irq_type = { |
Thomas Gleixner | 08d0fd0 | 2005-09-10 00:26:42 -0700 | [diff] [blame] | 82 | .typename = "RTS7751R2D IRQ", |
| 83 | .startup = startup_rts7751r2d_irq, |
| 84 | .shutdown = shutdown_rts7751r2d_irq, |
| 85 | .enable = enable_rts7751r2d_irq, |
| 86 | .disable = disable_rts7751r2d_irq, |
| 87 | .ack = ack_rts7751r2d_irq, |
| 88 | .end = end_rts7751r2d_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | static void make_rts7751r2d_irq(unsigned int irq) |
| 92 | { |
| 93 | disable_irq_nosync(irq); |
Ingo Molnar | d1bef4e | 2006-06-29 02:24:36 -0700 | [diff] [blame] | 94 | irq_desc[irq].chip = &rts7751r2d_irq_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | disable_rts7751r2d_irq(irq); |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Initialize IRQ setting |
| 100 | */ |
| 101 | void __init init_rts7751r2d_IRQ(void) |
| 102 | { |
| 103 | int i; |
| 104 | |
| 105 | /* IRL0=KEY Input |
| 106 | * IRL1=Ethernet |
| 107 | * IRL2=CF Card |
| 108 | * IRL3=CF Card Insert |
| 109 | * IRL4=PCMCIA |
| 110 | * IRL5=VOYAGER |
| 111 | * IRL6=RTC Alarm |
| 112 | * IRL7=RTC Timer |
| 113 | * IRL8=SD Card |
| 114 | * IRL9=PCI Slot #1 |
| 115 | * IRL10=PCI Slot #2 |
| 116 | * IRL11=Extention #0 |
| 117 | * IRL12=Extention #1 |
| 118 | * IRL13=Extention #2 |
| 119 | * IRL14=Extention #3 |
| 120 | */ |
| 121 | |
| 122 | for (i=0; i<15; i++) |
| 123 | make_rts7751r2d_irq(i); |
| 124 | |
| 125 | setup_voyagergx_irq(); |
| 126 | } |