diff options
author | David S. Miller <davem@davemloft.net> | 2008-10-11 12:39:35 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-10-11 12:39:35 -0700 |
commit | 56c5d900dbb8e042bfad035d18433476931d8f93 (patch) | |
tree | 00b793965beeef10db03e0ff021d2d965c410759 /arch/mips/txx9/rbtx4939/irq.c | |
parent | 4dd95b63ae25c5cad6986829b5e8788e9faa0330 (diff) | |
parent | ead9d23d803ea3a73766c3cb27bf7563ac8d7266 (diff) | |
download | op-kernel-dev-56c5d900dbb8e042bfad035d18433476931d8f93.zip op-kernel-dev-56c5d900dbb8e042bfad035d18433476931d8f93.tar.gz |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
sound/core/memalloc.c
Diffstat (limited to 'arch/mips/txx9/rbtx4939/irq.c')
-rw-r--r-- | arch/mips/txx9/rbtx4939/irq.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/arch/mips/txx9/rbtx4939/irq.c b/arch/mips/txx9/rbtx4939/irq.c new file mode 100644 index 0000000..500cc0a --- /dev/null +++ b/arch/mips/txx9/rbtx4939/irq.c @@ -0,0 +1,96 @@ +/* + * Toshiba RBTX4939 interrupt routines + * Based on linux/arch/mips/txx9/rbtx4938/irq.c, + * and RBTX49xx patch from CELF patch archive. + * + * Copyright (C) 2000-2001,2005-2006 Toshiba Corporation + * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the + * terms of the GNU General Public License version 2. This program is + * licensed "as is" without any warranty of any kind, whether express + * or implied. + */ +#include <linux/init.h> +#include <linux/interrupt.h> +#include <asm/mipsregs.h> +#include <asm/txx9/rbtx4939.h> + +/* + * RBTX4939 IOC controller definition + */ + +static void rbtx4939_ioc_irq_unmask(unsigned int irq) +{ + int ioc_nr = irq - RBTX4939_IRQ_IOC; + + writeb(readb(rbtx4939_ien_addr) | (1 << ioc_nr), rbtx4939_ien_addr); +} + +static void rbtx4939_ioc_irq_mask(unsigned int irq) +{ + int ioc_nr = irq - RBTX4939_IRQ_IOC; + + writeb(readb(rbtx4939_ien_addr) & ~(1 << ioc_nr), rbtx4939_ien_addr); + mmiowb(); +} + +static struct irq_chip rbtx4939_ioc_irq_chip = { + .name = "IOC", + .ack = rbtx4939_ioc_irq_mask, + .mask = rbtx4939_ioc_irq_mask, + .mask_ack = rbtx4939_ioc_irq_mask, + .unmask = rbtx4939_ioc_irq_unmask, +}; + + +static inline int rbtx4939_ioc_irqroute(void) +{ + unsigned char istat = readb(rbtx4939_ifac2_addr); + + if (unlikely(istat == 0)) + return -1; + return RBTX4939_IRQ_IOC + __fls8(istat); +} + +static int rbtx4939_irq_dispatch(int pending) +{ + int irq; + + if (pending & CAUSEF_IP7) + return MIPS_CPU_IRQ_BASE + 7; + irq = tx4939_irq(); + if (likely(irq >= 0)) { + /* redirect IOC interrupts */ + switch (irq) { + case RBTX4939_IRQ_IOCINT: + irq = rbtx4939_ioc_irqroute(); + break; + } + } else if (pending & CAUSEF_IP0) + irq = MIPS_CPU_IRQ_BASE + 0; + else if (pending & CAUSEF_IP1) + irq = MIPS_CPU_IRQ_BASE + 1; + else + irq = -1; + return irq; +} + +void __init rbtx4939_irq_setup(void) +{ + int i; + + /* mask all IOC interrupts */ + writeb(0, rbtx4939_ien_addr); + + /* clear SoftInt interrupts */ + writeb(0, rbtx4939_softint_addr); + + txx9_irq_dispatch = rbtx4939_irq_dispatch; + + tx4939_irq_init(); + for (i = RBTX4939_IRQ_IOC; + i < RBTX4939_IRQ_IOC + RBTX4939_NR_IRQ_IOC; i++) + set_irq_chip_and_handler(i, &rbtx4939_ioc_irq_chip, + handle_level_irq); + + set_irq_chained_handler(RBTX4939_IRQ_IOCINT, handle_simple_irq); +} |