Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Toshiba RBTX4927 specific interrupt handlers |
| 3 | * |
| 4 | * Author: MontaVista Software, Inc. |
| 5 | * source@mvista.com |
| 6 | * |
| 7 | * Copyright 2001-2002 MontaVista Software Inc. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your |
| 12 | * option) any later version. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 16 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 19 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 20 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 21 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| 22 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| 23 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License along |
| 26 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 27 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 28 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | /* |
Atsushi Nemoto | bb72f1f | 2008-07-24 00:25:21 +0900 | [diff] [blame] | 30 | * I8259A_IRQ_BASE+00 |
| 31 | * I8259A_IRQ_BASE+01 PS2/Keyboard |
| 32 | * I8259A_IRQ_BASE+02 Cascade RBTX4927-ISA (irqs 8-15) |
| 33 | * I8259A_IRQ_BASE+03 |
| 34 | * I8259A_IRQ_BASE+04 |
| 35 | * I8259A_IRQ_BASE+05 |
| 36 | * I8259A_IRQ_BASE+06 |
| 37 | * I8259A_IRQ_BASE+07 |
| 38 | * I8259A_IRQ_BASE+08 |
| 39 | * I8259A_IRQ_BASE+09 |
| 40 | * I8259A_IRQ_BASE+10 |
| 41 | * I8259A_IRQ_BASE+11 |
| 42 | * I8259A_IRQ_BASE+12 PS2/Mouse (not supported at this time) |
| 43 | * I8259A_IRQ_BASE+13 |
| 44 | * I8259A_IRQ_BASE+14 IDE |
| 45 | * I8259A_IRQ_BASE+15 |
| 46 | * |
| 47 | * MIPS_CPU_IRQ_BASE+00 Software 0 |
| 48 | * MIPS_CPU_IRQ_BASE+01 Software 1 |
| 49 | * MIPS_CPU_IRQ_BASE+02 Cascade TX4927-CP0 |
| 50 | * MIPS_CPU_IRQ_BASE+03 Multiplexed -- do not use |
| 51 | * MIPS_CPU_IRQ_BASE+04 Multiplexed -- do not use |
| 52 | * MIPS_CPU_IRQ_BASE+05 Multiplexed -- do not use |
| 53 | * MIPS_CPU_IRQ_BASE+06 Multiplexed -- do not use |
| 54 | * MIPS_CPU_IRQ_BASE+07 CPU TIMER |
| 55 | * |
| 56 | * TXX9_IRQ_BASE+00 |
| 57 | * TXX9_IRQ_BASE+01 |
| 58 | * TXX9_IRQ_BASE+02 |
| 59 | * TXX9_IRQ_BASE+03 Cascade RBTX4927-IOC |
| 60 | * TXX9_IRQ_BASE+04 |
| 61 | * TXX9_IRQ_BASE+05 RBTX4927 RTL-8019AS ethernet |
| 62 | * TXX9_IRQ_BASE+06 |
| 63 | * TXX9_IRQ_BASE+07 |
| 64 | * TXX9_IRQ_BASE+08 TX4927 SerialIO Channel 0 |
| 65 | * TXX9_IRQ_BASE+09 TX4927 SerialIO Channel 1 |
| 66 | * TXX9_IRQ_BASE+10 |
| 67 | * TXX9_IRQ_BASE+11 |
| 68 | * TXX9_IRQ_BASE+12 |
| 69 | * TXX9_IRQ_BASE+13 |
| 70 | * TXX9_IRQ_BASE+14 |
| 71 | * TXX9_IRQ_BASE+15 |
| 72 | * TXX9_IRQ_BASE+16 TX4927 PCI PCI-C |
| 73 | * TXX9_IRQ_BASE+17 |
| 74 | * TXX9_IRQ_BASE+18 |
| 75 | * TXX9_IRQ_BASE+19 |
| 76 | * TXX9_IRQ_BASE+20 |
| 77 | * TXX9_IRQ_BASE+21 |
| 78 | * TXX9_IRQ_BASE+22 TX4927 PCI PCI-ERR |
| 79 | * TXX9_IRQ_BASE+23 TX4927 PCI PCI-PMA (not used) |
| 80 | * TXX9_IRQ_BASE+24 |
| 81 | * TXX9_IRQ_BASE+25 |
| 82 | * TXX9_IRQ_BASE+26 |
| 83 | * TXX9_IRQ_BASE+27 |
| 84 | * TXX9_IRQ_BASE+28 |
| 85 | * TXX9_IRQ_BASE+29 |
| 86 | * TXX9_IRQ_BASE+30 |
| 87 | * TXX9_IRQ_BASE+31 |
| 88 | * |
| 89 | * RBTX4927_IRQ_IOC+00 FPCIB0 PCI-D (SouthBridge) |
| 90 | * RBTX4927_IRQ_IOC+01 FPCIB0 PCI-C (SouthBridge) |
| 91 | * RBTX4927_IRQ_IOC+02 FPCIB0 PCI-B (SouthBridge/IDE/pin=1,INTR) |
| 92 | * RBTX4927_IRQ_IOC+03 FPCIB0 PCI-A (SouthBridge/USB/pin=4) |
| 93 | * RBTX4927_IRQ_IOC+04 |
| 94 | * RBTX4927_IRQ_IOC+05 |
| 95 | * RBTX4927_IRQ_IOC+06 |
| 96 | * RBTX4927_IRQ_IOC+07 |
| 97 | * |
| 98 | * NOTES: |
| 99 | * SouthBridge/INTR is mapped to SouthBridge/A=PCI-B/#58 |
| 100 | * SouthBridge/ISA/pin=0 no pci irq used by this device |
| 101 | * SouthBridge/IDE/pin=1 no pci irq used by this device, using INTR |
| 102 | * via ISA IRQ14 |
| 103 | * SouthBridge/USB/pin=4 using pci irq SouthBridge/D=PCI-A=#59 |
| 104 | * SouthBridge/PMC/pin=0 no pci irq used by this device |
| 105 | * SuperIO/PS2/Keyboard, using INTR via ISA IRQ1 |
| 106 | * SuperIO/PS2/Mouse, using INTR via ISA IRQ12 (mouse not currently supported) |
| 107 | * JP7 is not bus master -- do NOT use -- only 4 pci bus master's |
| 108 | * allowed -- SouthBridge, JP4, JP5, JP6 |
| 109 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #include <asm/io.h> |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 115 | #include <asm/mipsregs.h> |
| 116 | #include <asm/txx9/generic.h> |
Atsushi Nemoto | 22b1d70 | 2008-07-11 00:31:36 +0900 | [diff] [blame] | 117 | #include <asm/txx9/rbtx4927.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq); |
| 120 | static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | #define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC" |
Ralf Baechle | 94dee17 | 2006-07-02 14:41:42 +0100 | [diff] [blame] | 123 | static struct irq_chip toshiba_rbtx4927_irq_ioc_type = { |
Atsushi Nemoto | 70d21cd | 2007-01-15 00:07:25 +0900 | [diff] [blame] | 124 | .name = TOSHIBA_RBTX4927_IOC_NAME, |
Atsushi Nemoto | 1603b5a | 2006-11-02 02:08:36 +0900 | [diff] [blame] | 125 | .ack = toshiba_rbtx4927_irq_ioc_disable, |
| 126 | .mask = toshiba_rbtx4927_irq_ioc_disable, |
| 127 | .mask_ack = toshiba_rbtx4927_irq_ioc_disable, |
| 128 | .unmask = toshiba_rbtx4927_irq_ioc_enable, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 131 | static int toshiba_rbtx4927_irq_nested(int sw_irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Atsushi Nemoto | b29eee4 | 2008-04-16 02:00:45 +0900 | [diff] [blame] | 133 | u8 level3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Atsushi Nemoto | 94a4c32 | 2008-07-19 01:51:47 +0900 | [diff] [blame] | 135 | level3 = readb(rbtx4927_imstat_addr) & 0x1f; |
Atsushi Nemoto | 89d63fe | 2008-07-11 00:33:08 +0900 | [diff] [blame] | 136 | if (level3) |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 137 | sw_irq = RBTX4927_IRQ_IOC + fls(level3) - 1; |
Atsushi Nemoto | bb72f1f | 2008-07-24 00:25:21 +0900 | [diff] [blame] | 138 | return sw_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | static void __init toshiba_rbtx4927_irq_ioc_init(void) |
| 142 | { |
| 143 | int i; |
| 144 | |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 145 | for (i = RBTX4927_IRQ_IOC; |
| 146 | i < RBTX4927_IRQ_IOC + RBTX4927_NR_IRQ_IOC; i++) |
Atsushi Nemoto | 1417836 | 2006-11-14 01:13:18 +0900 | [diff] [blame] | 147 | set_irq_chip_and_handler(i, &toshiba_rbtx4927_irq_ioc_type, |
| 148 | handle_level_irq); |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 149 | set_irq_chained_handler(RBTX4927_IRQ_IOCINT, handle_simple_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq) |
| 153 | { |
Atsushi Nemoto | b29eee4 | 2008-04-16 02:00:45 +0900 | [diff] [blame] | 154 | unsigned char v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Atsushi Nemoto | 94a4c32 | 2008-07-19 01:51:47 +0900 | [diff] [blame] | 156 | v = readb(rbtx4927_imask_addr); |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 157 | v |= (1 << (irq - RBTX4927_IRQ_IOC)); |
Atsushi Nemoto | 94a4c32 | 2008-07-19 01:51:47 +0900 | [diff] [blame] | 158 | writeb(v, rbtx4927_imask_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq) |
| 162 | { |
Atsushi Nemoto | b29eee4 | 2008-04-16 02:00:45 +0900 | [diff] [blame] | 163 | unsigned char v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Atsushi Nemoto | 94a4c32 | 2008-07-19 01:51:47 +0900 | [diff] [blame] | 165 | v = readb(rbtx4927_imask_addr); |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 166 | v &= ~(1 << (irq - RBTX4927_IRQ_IOC)); |
Atsushi Nemoto | 94a4c32 | 2008-07-19 01:51:47 +0900 | [diff] [blame] | 167 | writeb(v, rbtx4927_imask_addr); |
Atsushi Nemoto | a02eb8d | 2007-08-28 00:28:09 +0900 | [diff] [blame] | 168 | mmiowb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Atsushi Nemoto | edcaf1a | 2008-07-11 23:27:54 +0900 | [diff] [blame] | 172 | static int rbtx4927_irq_dispatch(int pending) |
| 173 | { |
| 174 | int irq; |
| 175 | |
| 176 | if (pending & STATUSF_IP7) /* cpu timer */ |
| 177 | irq = MIPS_CPU_IRQ_BASE + 7; |
| 178 | else if (pending & STATUSF_IP2) { /* tx4927 pic */ |
| 179 | irq = txx9_irq(); |
| 180 | if (irq == RBTX4927_IRQ_IOCINT) |
| 181 | irq = toshiba_rbtx4927_irq_nested(irq); |
| 182 | } else if (pending & STATUSF_IP0) /* user line 0 */ |
| 183 | irq = MIPS_CPU_IRQ_BASE + 0; |
| 184 | else if (pending & STATUSF_IP1) /* user line 1 */ |
| 185 | irq = MIPS_CPU_IRQ_BASE + 1; |
| 186 | else |
| 187 | irq = -1; |
| 188 | return irq; |
| 189 | } |
| 190 | |
| 191 | void __init rbtx4927_irq_setup(void) |
| 192 | { |
| 193 | txx9_irq_dispatch = rbtx4927_irq_dispatch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | tx4927_irq_init(); |
| 195 | toshiba_rbtx4927_irq_ioc_init(); |
Atsushi Nemoto | c87abd7 | 2007-08-02 23:36:02 +0900 | [diff] [blame] | 196 | /* Onboard 10M Ether: High Active */ |
| 197 | set_irq_type(RBTX4927_RTL_8019_IRQ, IRQF_TRIGGER_HIGH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |