add initial 2.6.28 support for brcm47xx target
[openwrt/svn-archive/archive.git] / target / linux / brcm47xx / files-2.6.23 / arch / mips / bcm947xx / irq.c
1 /*
2 * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
3 * Copyright (C) 2008 Michael Buesch <mb@bu3sch.de>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
11 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
13 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
14 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
15 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
16 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
17 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
18 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
19 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
20 *
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/interrupt.h>
29 #include <linux/irq.h>
30 #include <linux/module.h>
31 #include <linux/smp.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/ssb/ssb.h>
35
36 #include <asm/cpu.h>
37 #include <asm/io.h>
38 #include <asm/irq.h>
39 #include <asm/irq_cpu.h>
40
41
42 extern struct ssb_bus ssb;
43
44
45 void plat_irq_dispatch(void)
46 {
47 u32 cause;
48
49 cause = read_c0_cause() & read_c0_status() & CAUSEF_IP;
50
51 clear_c0_status(cause);
52
53 if (cause & CAUSEF_IP7)
54 do_IRQ(7);
55 if (cause & CAUSEF_IP2)
56 do_IRQ(2);
57 if (cause & CAUSEF_IP3)
58 do_IRQ(3);
59 if (cause & CAUSEF_IP4)
60 do_IRQ(4);
61 if (cause & CAUSEF_IP5)
62 do_IRQ(5);
63 if (cause & CAUSEF_IP6)
64 do_IRQ(6);
65 }
66
67 void __init arch_init_irq(void)
68 {
69 mips_cpu_irq_init();
70 }
71
72 int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
73 {
74 int res;
75
76 res = ssb_pcibios_map_irq(dev, slot, pin);
77 if (res < 0) {
78 printk(KERN_ALERT "PCI: Failed to map IRQ of device %s\n",
79 dev->dev.bus_id);
80 return 0;
81 }
82 /* IRQ-0 and IRQ-1 are software interrupts. */
83 WARN_ON((res == 0) || (res == 1));
84
85 return res;
86 }