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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/cchips/voyagergx/irq.c
downloadlinux-stericsson-9e734775f7c22d2f89943ad6c745571f1930105f.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sh/cchips/voyagergx/irq.c')
-rw-r--r--arch/sh/cchips/voyagergx/irq.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/arch/sh/cchips/voyagergx/irq.c b/arch/sh/cchips/voyagergx/irq.c
new file mode 100644
index 000000000000..3079234cb65b
--- /dev/null
+++ b/arch/sh/cchips/voyagergx/irq.c
@@ -0,0 +1,194 @@
+/* -------------------------------------------------------------------- */
+/* setup_voyagergx.c: */
+/* -------------------------------------------------------------------- */
+/* 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 program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ 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.
+
+ Copyright 2003 (c) Lineo uSolutions,Inc.
+*/
+/* -------------------------------------------------------------------- */
+
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/rts7751r2d/rts7751r2d.h>
+#include <asm/rts7751r2d/voyagergx_reg.h>
+
+static void disable_voyagergx_irq(unsigned int irq)
+{
+ unsigned long flags, val;
+ unsigned long mask = 1 << (irq - VOYAGER_IRQ_BASE);
+
+ pr_debug("disable_voyagergx_irq(%d): mask=%x\n", irq, mask);
+ local_irq_save(flags);
+ val = inl(VOYAGER_INT_MASK);
+ val &= ~mask;
+ outl(val, VOYAGER_INT_MASK);
+ local_irq_restore(flags);
+}
+
+
+static void enable_voyagergx_irq(unsigned int irq)
+{
+ unsigned long flags, val;
+ unsigned long mask = 1 << (irq - VOYAGER_IRQ_BASE);
+
+ pr_debug("disable_voyagergx_irq(%d): mask=%x\n", irq, mask);
+ local_irq_save(flags);
+ val = inl(VOYAGER_INT_MASK);
+ val |= mask;
+ outl(val, VOYAGER_INT_MASK);
+ local_irq_restore(flags);
+}
+
+
+static void mask_and_ack_voyagergx(unsigned int irq)
+{
+ disable_voyagergx_irq(irq);
+}
+
+static void end_voyagergx_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ enable_voyagergx_irq(irq);
+}
+
+static unsigned int startup_voyagergx_irq(unsigned int irq)
+{
+ enable_voyagergx_irq(irq);
+ return 0;
+}
+
+static void shutdown_voyagergx_irq(unsigned int irq)
+{
+ disable_voyagergx_irq(irq);
+}
+
+static struct hw_interrupt_type voyagergx_irq_type = {
+ "VOYAGERGX-IRQ",
+ startup_voyagergx_irq,
+ shutdown_voyagergx_irq,
+ enable_voyagergx_irq,
+ disable_voyagergx_irq,
+ mask_and_ack_voyagergx,
+ end_voyagergx_irq,
+};
+
+static irqreturn_t voyagergx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ printk(KERN_INFO
+ "VoyagerGX: spurious interrupt, status: 0x%x\n",
+ inl(INT_STATUS));
+ return IRQ_HANDLED;
+}
+
+
+/*====================================================*/
+
+static struct {
+ int (*func)(int, void *);
+ void *dev;
+} voyagergx_demux[VOYAGER_IRQ_NUM];
+
+void voyagergx_register_irq_demux(int irq,
+ int (*demux)(int irq, void *dev), void *dev)
+{
+ voyagergx_demux[irq - VOYAGER_IRQ_BASE].func = demux;
+ voyagergx_demux[irq - VOYAGER_IRQ_BASE].dev = dev;
+}
+
+void voyagergx_unregister_irq_demux(int irq)
+{
+ voyagergx_demux[irq - VOYAGER_IRQ_BASE].func = 0;
+}
+
+int voyagergx_irq_demux(int irq)
+{
+
+ if (irq == IRQ_VOYAGER ) {
+ unsigned long i = 0, bit __attribute__ ((unused));
+ unsigned long val = inl(INT_STATUS);
+#if 1
+ if ( val & ( 1 << 1 )){
+ i = 1;
+ } else if ( val & ( 1 << 2 )){
+ i = 2;
+ } else if ( val & ( 1 << 6 )){
+ i = 6;
+ } else if( val & ( 1 << 10 )){
+ i = 10;
+ } else if( val & ( 1 << 11 )){
+ i = 11;
+ } else if( val & ( 1 << 12 )){
+ i = 12;
+ } else if( val & ( 1 << 17 )){
+ i = 17;
+ } else {
+ printk("Unexpected IRQ irq = %d status = 0x%08lx\n", irq, val);
+ }
+ pr_debug("voyagergx_irq_demux %d \n", i);
+#else
+ for (bit = 1, i = 0 ; i < VOYAGER_IRQ_NUM ; bit <<= 1, i++)
+ if (val & bit)
+ break;
+#endif
+ if (i < VOYAGER_IRQ_NUM) {
+ irq = VOYAGER_IRQ_BASE + i;
+ if (voyagergx_demux[i].func != 0)
+ irq = voyagergx_demux[i].func(irq, voyagergx_demux[i].dev);
+ }
+ }
+ return irq;
+}
+
+static struct irqaction irq0 = { voyagergx_interrupt, SA_INTERRUPT, 0, "VOYAGERGX", NULL, NULL};
+
+void __init setup_voyagergx_irq(void)
+{
+ int i, flag;
+
+ printk(KERN_INFO "VoyagerGX configured at 0x%x on irq %d(mapped into %d to %d)\n",
+ VOYAGER_BASE,
+ IRQ_VOYAGER,
+ VOYAGER_IRQ_BASE,
+ VOYAGER_IRQ_BASE + VOYAGER_IRQ_NUM - 1);
+
+ for (i=0; i<VOYAGER_IRQ_NUM; i++) {
+ flag = 0;
+ switch (VOYAGER_IRQ_BASE + i) {
+ case VOYAGER_USBH_IRQ:
+ case VOYAGER_8051_IRQ:
+ case VOYAGER_UART0_IRQ:
+ case VOYAGER_UART1_IRQ:
+ case VOYAGER_AC97_IRQ:
+ flag = 1;
+ }
+ if (flag == 1)
+ irq_desc[VOYAGER_IRQ_BASE + i].handler = &voyagergx_irq_type;
+ }
+
+ setup_irq(IRQ_VOYAGER, &irq0);
+}
+