| /* |
| * Toshiba RBTX4927 specific interrupt handlers |
| * |
| * Author: MontaVista Software, Inc. |
| * source@mvista.com |
| * |
| * Copyright 2001-2002 MontaVista Software Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| /* |
| * I8259A_IRQ_BASE+00 |
| * I8259A_IRQ_BASE+01 PS2/Keyboard |
| * I8259A_IRQ_BASE+02 Cascade RBTX4927-ISA (irqs 8-15) |
| * I8259A_IRQ_BASE+03 |
| * I8259A_IRQ_BASE+04 |
| * I8259A_IRQ_BASE+05 |
| * I8259A_IRQ_BASE+06 |
| * I8259A_IRQ_BASE+07 |
| * I8259A_IRQ_BASE+08 |
| * I8259A_IRQ_BASE+09 |
| * I8259A_IRQ_BASE+10 |
| * I8259A_IRQ_BASE+11 |
| * I8259A_IRQ_BASE+12 PS2/Mouse (not supported at this time) |
| * I8259A_IRQ_BASE+13 |
| * I8259A_IRQ_BASE+14 IDE |
| * I8259A_IRQ_BASE+15 |
| * |
| * MIPS_CPU_IRQ_BASE+00 Software 0 |
| * MIPS_CPU_IRQ_BASE+01 Software 1 |
| * MIPS_CPU_IRQ_BASE+02 Cascade TX4927-CP0 |
| * MIPS_CPU_IRQ_BASE+03 Multiplexed -- do not use |
| * MIPS_CPU_IRQ_BASE+04 Multiplexed -- do not use |
| * MIPS_CPU_IRQ_BASE+05 Multiplexed -- do not use |
| * MIPS_CPU_IRQ_BASE+06 Multiplexed -- do not use |
| * MIPS_CPU_IRQ_BASE+07 CPU TIMER |
| * |
| * TXX9_IRQ_BASE+00 |
| * TXX9_IRQ_BASE+01 |
| * TXX9_IRQ_BASE+02 |
| * TXX9_IRQ_BASE+03 Cascade RBTX4927-IOC |
| * TXX9_IRQ_BASE+04 |
| * TXX9_IRQ_BASE+05 RBTX4927 RTL-8019AS ethernet |
| * TXX9_IRQ_BASE+06 |
| * TXX9_IRQ_BASE+07 |
| * TXX9_IRQ_BASE+08 TX4927 SerialIO Channel 0 |
| * TXX9_IRQ_BASE+09 TX4927 SerialIO Channel 1 |
| * TXX9_IRQ_BASE+10 |
| * TXX9_IRQ_BASE+11 |
| * TXX9_IRQ_BASE+12 |
| * TXX9_IRQ_BASE+13 |
| * TXX9_IRQ_BASE+14 |
| * TXX9_IRQ_BASE+15 |
| * TXX9_IRQ_BASE+16 TX4927 PCI PCI-C |
| * TXX9_IRQ_BASE+17 |
| * TXX9_IRQ_BASE+18 |
| * TXX9_IRQ_BASE+19 |
| * TXX9_IRQ_BASE+20 |
| * TXX9_IRQ_BASE+21 |
| * TXX9_IRQ_BASE+22 TX4927 PCI PCI-ERR |
| * TXX9_IRQ_BASE+23 TX4927 PCI PCI-PMA (not used) |
| * TXX9_IRQ_BASE+24 |
| * TXX9_IRQ_BASE+25 |
| * TXX9_IRQ_BASE+26 |
| * TXX9_IRQ_BASE+27 |
| * TXX9_IRQ_BASE+28 |
| * TXX9_IRQ_BASE+29 |
| * TXX9_IRQ_BASE+30 |
| * TXX9_IRQ_BASE+31 |
| * |
| * RBTX4927_IRQ_IOC+00 FPCIB0 PCI-D (SouthBridge) |
| * RBTX4927_IRQ_IOC+01 FPCIB0 PCI-C (SouthBridge) |
| * RBTX4927_IRQ_IOC+02 FPCIB0 PCI-B (SouthBridge/IDE/pin=1,INTR) |
| * RBTX4927_IRQ_IOC+03 FPCIB0 PCI-A (SouthBridge/USB/pin=4) |
| * RBTX4927_IRQ_IOC+04 |
| * RBTX4927_IRQ_IOC+05 |
| * RBTX4927_IRQ_IOC+06 |
| * RBTX4927_IRQ_IOC+07 |
| * |
| * NOTES: |
| * SouthBridge/INTR is mapped to SouthBridge/A=PCI-B/#58 |
| * SouthBridge/ISA/pin=0 no pci irq used by this device |
| * SouthBridge/IDE/pin=1 no pci irq used by this device, using INTR |
| * via ISA IRQ14 |
| * SouthBridge/USB/pin=4 using pci irq SouthBridge/D=PCI-A=#59 |
| * SouthBridge/PMC/pin=0 no pci irq used by this device |
| * SuperIO/PS2/Keyboard, using INTR via ISA IRQ1 |
| * SuperIO/PS2/Mouse, using INTR via ISA IRQ12 (mouse not currently supported) |
| * JP7 is not bus master -- do NOT use -- only 4 pci bus master's |
| * allowed -- SouthBridge, JP4, JP5, JP6 |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <asm/io.h> |
| #include <asm/mipsregs.h> |
| #include <asm/txx9/generic.h> |
| #include <asm/txx9/rbtx4927.h> |
| |
| static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq); |
| static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq); |
| |
| #define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC" |
| static struct irq_chip toshiba_rbtx4927_irq_ioc_type = { |
| .name = TOSHIBA_RBTX4927_IOC_NAME, |
| .ack = toshiba_rbtx4927_irq_ioc_disable, |
| .mask = toshiba_rbtx4927_irq_ioc_disable, |
| .mask_ack = toshiba_rbtx4927_irq_ioc_disable, |
| .unmask = toshiba_rbtx4927_irq_ioc_enable, |
| }; |
| |
| static int toshiba_rbtx4927_irq_nested(int sw_irq) |
| { |
| u8 level3; |
| |
| level3 = readb(rbtx4927_imstat_addr) & 0x1f; |
| if (unlikely(!level3)) |
| return -1; |
| return RBTX4927_IRQ_IOC + __fls8(level3); |
| } |
| |
| static void __init toshiba_rbtx4927_irq_ioc_init(void) |
| { |
| int i; |
| |
| /* mask all IOC interrupts */ |
| writeb(0, rbtx4927_imask_addr); |
| /* clear SoftInt interrupts */ |
| writeb(0, rbtx4927_softint_addr); |
| |
| for (i = RBTX4927_IRQ_IOC; |
| i < RBTX4927_IRQ_IOC + RBTX4927_NR_IRQ_IOC; i++) |
| set_irq_chip_and_handler(i, &toshiba_rbtx4927_irq_ioc_type, |
| handle_level_irq); |
| set_irq_chained_handler(RBTX4927_IRQ_IOCINT, handle_simple_irq); |
| } |
| |
| static void toshiba_rbtx4927_irq_ioc_enable(unsigned int irq) |
| { |
| unsigned char v; |
| |
| v = readb(rbtx4927_imask_addr); |
| v |= (1 << (irq - RBTX4927_IRQ_IOC)); |
| writeb(v, rbtx4927_imask_addr); |
| } |
| |
| static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq) |
| { |
| unsigned char v; |
| |
| v = readb(rbtx4927_imask_addr); |
| v &= ~(1 << (irq - RBTX4927_IRQ_IOC)); |
| writeb(v, rbtx4927_imask_addr); |
| mmiowb(); |
| } |
| |
| |
| static int rbtx4927_irq_dispatch(int pending) |
| { |
| int irq; |
| |
| if (pending & STATUSF_IP7) /* cpu timer */ |
| irq = MIPS_CPU_IRQ_BASE + 7; |
| else if (pending & STATUSF_IP2) { /* tx4927 pic */ |
| irq = txx9_irq(); |
| if (irq == RBTX4927_IRQ_IOCINT) |
| irq = toshiba_rbtx4927_irq_nested(irq); |
| } else if (pending & STATUSF_IP0) /* user line 0 */ |
| irq = MIPS_CPU_IRQ_BASE + 0; |
| else if (pending & STATUSF_IP1) /* user line 1 */ |
| irq = MIPS_CPU_IRQ_BASE + 1; |
| else |
| irq = -1; |
| return irq; |
| } |
| |
| void __init rbtx4927_irq_setup(void) |
| { |
| txx9_irq_dispatch = rbtx4927_irq_dispatch; |
| tx4927_irq_init(); |
| toshiba_rbtx4927_irq_ioc_init(); |
| /* Onboard 10M Ether: High Active */ |
| set_irq_type(RBTX4927_RTL_8019_IRQ, IRQF_TRIGGER_HIGH); |
| } |
