1 /* 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 */ 29 /* 30 IRQ Device 31 00 RBTX4927-ISA/00 32 01 RBTX4927-ISA/01 PS2/Keyboard 33 02 RBTX4927-ISA/02 Cascade RBTX4927-ISA (irqs 8-15) 34 03 RBTX4927-ISA/03 35 04 RBTX4927-ISA/04 36 05 RBTX4927-ISA/05 37 06 RBTX4927-ISA/06 38 07 RBTX4927-ISA/07 39 08 RBTX4927-ISA/08 40 09 RBTX4927-ISA/09 41 10 RBTX4927-ISA/10 42 11 RBTX4927-ISA/11 43 12 RBTX4927-ISA/12 PS2/Mouse (not supported at this time) 44 13 RBTX4927-ISA/13 45 14 RBTX4927-ISA/14 IDE 46 15 RBTX4927-ISA/15 47 48 16 TX4927-CP0/00 Software 0 49 17 TX4927-CP0/01 Software 1 50 18 TX4927-CP0/02 Cascade TX4927-CP0 51 19 TX4927-CP0/03 Multiplexed -- do not use 52 20 TX4927-CP0/04 Multiplexed -- do not use 53 21 TX4927-CP0/05 Multiplexed -- do not use 54 22 TX4927-CP0/06 Multiplexed -- do not use 55 23 TX4927-CP0/07 CPU TIMER 56 57 24 TX4927-PIC/00 58 25 TX4927-PIC/01 59 26 TX4927-PIC/02 60 27 TX4927-PIC/03 Cascade RBTX4927-IOC 61 28 TX4927-PIC/04 62 29 TX4927-PIC/05 RBTX4927 RTL-8019AS ethernet 63 30 TX4927-PIC/06 64 31 TX4927-PIC/07 65 32 TX4927-PIC/08 TX4927 SerialIO Channel 0 66 33 TX4927-PIC/09 TX4927 SerialIO Channel 1 67 34 TX4927-PIC/10 68 35 TX4927-PIC/11 69 36 TX4927-PIC/12 70 37 TX4927-PIC/13 71 38 TX4927-PIC/14 72 39 TX4927-PIC/15 73 40 TX4927-PIC/16 TX4927 PCI PCI-C 74 41 TX4927-PIC/17 75 42 TX4927-PIC/18 76 43 TX4927-PIC/19 77 44 TX4927-PIC/20 78 45 TX4927-PIC/21 79 46 TX4927-PIC/22 TX4927 PCI PCI-ERR 80 47 TX4927-PIC/23 TX4927 PCI PCI-PMA (not used) 81 48 TX4927-PIC/24 82 49 TX4927-PIC/25 83 50 TX4927-PIC/26 84 51 TX4927-PIC/27 85 52 TX4927-PIC/28 86 53 TX4927-PIC/29 87 54 TX4927-PIC/30 88 55 TX4927-PIC/31 89 90 56 RBTX4927-IOC/00 FPCIB0 PCI-D PJ4/A PJ5/B SB/C PJ6/D PJ7/A (SouthBridge/NotUsed) [RTL-8139=PJ4] 91 57 RBTX4927-IOC/01 FPCIB0 PCI-C PJ4/D PJ5/A SB/B PJ6/C PJ7/D (SouthBridge/NotUsed) [RTL-8139=PJ5] 92 58 RBTX4927-IOC/02 FPCIB0 PCI-B PJ4/C PJ5/D SB/A PJ6/B PJ7/C (SouthBridge/IDE/pin=1,INTR) [RTL-8139=NotSupported] 93 59 RBTX4927-IOC/03 FPCIB0 PCI-A PJ4/B PJ5/C SB/D PJ6/A PJ7/B (SouthBridge/USB/pin=4) [RTL-8139=PJ6] 94 60 RBTX4927-IOC/04 95 61 RBTX4927-IOC/05 96 62 RBTX4927-IOC/06 97 63 RBTX4927-IOC/07 98 99 NOTES: 100 SouthBridge/INTR is mapped to SouthBridge/A=PCI-B/#58 101 SouthBridge/ISA/pin=0 no pci irq used by this device 102 SouthBridge/IDE/pin=1 no pci irq used by this device, using INTR 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 allowed -- SouthBridge, JP4, JP5, JP6 108 */ 109 110 #include <linux/init.h> 111 #include <linux/types.h> 112 #include <linux/interrupt.h> 113 #include <asm/io.h> 114 #include <asm/mipsregs.h> 115 #include <asm/txx9/generic.h> 116 #include <asm/txx9/rbtx4927.h> 117 118 static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq); 119 static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq); 120 121 #define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC" 122 static struct irq_chip toshiba_rbtx4927_irq_ioc_type = { 123 .name = TOSHIBA_RBTX4927_IOC_NAME, 124 .ack = toshiba_rbtx4927_irq_ioc_disable, 125 .mask = toshiba_rbtx4927_irq_ioc_disable, 126 .mask_ack = toshiba_rbtx4927_irq_ioc_disable, 127 .unmask = toshiba_rbtx4927_irq_ioc_enable, 128 }; 129 #define TOSHIBA_RBTX4927_IOC_INTR_ENAB (void __iomem *)0xbc002000UL 130 #define TOSHIBA_RBTX4927_IOC_INTR_STAT (void __iomem *)0xbc002006UL 131 132 static int toshiba_rbtx4927_irq_nested(int sw_irq) 133 { 134 u8 level3; 135 136 level3 = readb(TOSHIBA_RBTX4927_IOC_INTR_STAT) & 0x1f; 137 if (level3) 138 sw_irq = RBTX4927_IRQ_IOC + fls(level3) - 1; 139 return (sw_irq); 140 } 141 142 static void __init toshiba_rbtx4927_irq_ioc_init(void) 143 { 144 int i; 145 146 for (i = RBTX4927_IRQ_IOC; 147 i < RBTX4927_IRQ_IOC + RBTX4927_NR_IRQ_IOC; i++) 148 set_irq_chip_and_handler(i, &toshiba_rbtx4927_irq_ioc_type, 149 handle_level_irq); 150 set_irq_chained_handler(RBTX4927_IRQ_IOCINT, handle_simple_irq); 151 } 152 153 static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq) 154 { 155 unsigned char v; 156 157 v = readb(TOSHIBA_RBTX4927_IOC_INTR_ENAB); 158 v |= (1 << (irq - RBTX4927_IRQ_IOC)); 159 writeb(v, TOSHIBA_RBTX4927_IOC_INTR_ENAB); 160 } 161 162 static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq) 163 { 164 unsigned char v; 165 166 v = readb(TOSHIBA_RBTX4927_IOC_INTR_ENAB); 167 v &= ~(1 << (irq - RBTX4927_IRQ_IOC)); 168 writeb(v, TOSHIBA_RBTX4927_IOC_INTR_ENAB); 169 mmiowb(); 170 } 171 172 173 static int rbtx4927_irq_dispatch(int pending) 174 { 175 int irq; 176 177 if (pending & STATUSF_IP7) /* cpu timer */ 178 irq = MIPS_CPU_IRQ_BASE + 7; 179 else if (pending & STATUSF_IP2) { /* tx4927 pic */ 180 irq = txx9_irq(); 181 if (irq == RBTX4927_IRQ_IOCINT) 182 irq = toshiba_rbtx4927_irq_nested(irq); 183 } else if (pending & STATUSF_IP0) /* user line 0 */ 184 irq = MIPS_CPU_IRQ_BASE + 0; 185 else if (pending & STATUSF_IP1) /* user line 1 */ 186 irq = MIPS_CPU_IRQ_BASE + 1; 187 else 188 irq = -1; 189 return irq; 190 } 191 192 void __init rbtx4927_irq_setup(void) 193 { 194 txx9_irq_dispatch = rbtx4927_irq_dispatch; 195 tx4927_irq_init(); 196 toshiba_rbtx4927_irq_ioc_init(); 197 /* Onboard 10M Ether: High Active */ 198 set_irq_type(RBTX4927_RTL_8019_IRQ, IRQF_TRIGGER_HIGH); 199 } 200