1 files changed, 199 insertions, 0 deletions

diff --git a/arch/mips/txx9/rbtx4927/irq.c b/arch/mips/txx9/rbtx4927/irq.c
new file mode 100644
index 00000000000..70f13211bc2
--- /dev/null
+++ b/arch/mips/txx9/rbtx4927/irq.c
@@ -0,0 +1,199 @@
+/*
+ * 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.
+ */
+/*
+IRQ  Device
+00   RBTX4927-ISA/00
+01   RBTX4927-ISA/01 PS2/Keyboard
+02   RBTX4927-ISA/02 Cascade RBTX4927-ISA (irqs 8-15)
+03   RBTX4927-ISA/03
+04   RBTX4927-ISA/04
+05   RBTX4927-ISA/05
+06   RBTX4927-ISA/06
+07   RBTX4927-ISA/07
+08   RBTX4927-ISA/08
+09   RBTX4927-ISA/09
+10   RBTX4927-ISA/10
+11   RBTX4927-ISA/11
+12   RBTX4927-ISA/12 PS2/Mouse (not supported at this time)
+13   RBTX4927-ISA/13
+14   RBTX4927-ISA/14 IDE
+15   RBTX4927-ISA/15
+
+16   TX4927-CP0/00 Software 0
+17   TX4927-CP0/01 Software 1
+18   TX4927-CP0/02 Cascade TX4927-CP0
+19   TX4927-CP0/03 Multiplexed -- do not use
+20   TX4927-CP0/04 Multiplexed -- do not use
+21   TX4927-CP0/05 Multiplexed -- do not use
+22   TX4927-CP0/06 Multiplexed -- do not use
+23   TX4927-CP0/07 CPU TIMER
+
+24   TX4927-PIC/00
+25   TX4927-PIC/01
+26   TX4927-PIC/02
+27   TX4927-PIC/03 Cascade RBTX4927-IOC
+28   TX4927-PIC/04
+29   TX4927-PIC/05 RBTX4927 RTL-8019AS ethernet
+30   TX4927-PIC/06
+31   TX4927-PIC/07
+32   TX4927-PIC/08 TX4927 SerialIO Channel 0
+33   TX4927-PIC/09 TX4927 SerialIO Channel 1
+34   TX4927-PIC/10
+35   TX4927-PIC/11
+36   TX4927-PIC/12
+37   TX4927-PIC/13
+38   TX4927-PIC/14
+39   TX4927-PIC/15
+40   TX4927-PIC/16 TX4927 PCI PCI-C
+41   TX4927-PIC/17
+42   TX4927-PIC/18
+43   TX4927-PIC/19
+44   TX4927-PIC/20
+45   TX4927-PIC/21
+46   TX4927-PIC/22 TX4927 PCI PCI-ERR
+47   TX4927-PIC/23 TX4927 PCI PCI-PMA (not used)
+48   TX4927-PIC/24
+49   TX4927-PIC/25
+50   TX4927-PIC/26
+51   TX4927-PIC/27
+52   TX4927-PIC/28
+53   TX4927-PIC/29
+54   TX4927-PIC/30
+55   TX4927-PIC/31
+
+56 RBTX4927-IOC/00 FPCIB0 PCI-D PJ4/A PJ5/B SB/C PJ6/D PJ7/A (SouthBridge/NotUsed)        [RTL-8139=PJ4]
+57 RBTX4927-IOC/01 FPCIB0 PCI-C PJ4/D PJ5/A SB/B PJ6/C PJ7/D (SouthBridge/NotUsed)        [RTL-8139=PJ5]
+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]
+59 RBTX4927-IOC/03 FPCIB0 PCI-A PJ4/B PJ5/C SB/D PJ6/A PJ7/B (SouthBridge/USB/pin=4)      [RTL-8139=PJ6]
+60 RBTX4927-IOC/04
+61 RBTX4927-IOC/05
+62 RBTX4927-IOC/06
+63 RBTX4927-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 <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,
+};
+#define TOSHIBA_RBTX4927_IOC_INTR_ENAB (void __iomem *)0xbc002000UL
+#define TOSHIBA_RBTX4927_IOC_INTR_STAT (void __iomem *)0xbc002006UL
+
+static int toshiba_rbtx4927_irq_nested(int sw_irq)
+{
+        u8 level3;
+
+        level3 = readb(TOSHIBA_RBTX4927_IOC_INTR_STAT) & 0x1f;
+        if (level3)
+                sw_irq = RBTX4927_IRQ_IOC + fls(level3) - 1;
+        return (sw_irq);
+}
+
+static void __init toshiba_rbtx4927_irq_ioc_init(void)
+{
+        int i;
+
+        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(TOSHIBA_RBTX4927_IOC_INTR_ENAB);
+        v |= (1 << (irq - RBTX4927_IRQ_IOC));
+        writeb(v, TOSHIBA_RBTX4927_IOC_INTR_ENAB);
+}
+
+static void toshiba_rbtx4927_irq_ioc_disable(unsigned int irq)
+{
+        unsigned char v;
+
+        v = readb(TOSHIBA_RBTX4927_IOC_INTR_ENAB);
+        v &= ~(1 << (irq - RBTX4927_IRQ_IOC));
+        writeb(v, TOSHIBA_RBTX4927_IOC_INTR_ENAB);
+        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);
+}