Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 79 insertions, 0 deletions

diff --git a/arch/mips/pci/fixup-jmr3927.c b/arch/mips/pci/fixup-jmr3927.c
new file mode 100644
index 000000000..d3102eeea
--- /dev/null
+++ b/arch/mips/pci/fixup-jmr3927.c
@@ -0,0 +1,79 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *      Board specific pci fixups.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *              ppopov@mvista.com or source@mvista.com
+ *
+ *  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.
+ */
+#include <linux/types.h>
+#include <asm/txx9/pci.h>
+#include <asm/txx9/jmr3927.h>
+
+int jmr3927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+        unsigned char irq = pin;
+
+        /* IRQ rotation (PICMG) */
+        irq--;                  /* 0-3 */
+        if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(23)) {
+                /* PCI CardSlot (IDSEL=A23, DevNu=12) */
+                /* PCIA => PCIC (IDSEL=A23) */
+                /* NOTE: JMR3927 JP1 must be set to OPEN */
+                irq = (irq + 2) % 4;
+        } else if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(22)) {
+                /* PCI CardSlot (IDSEL=A22, DevNu=11) */
+                /* PCIA => PCIA (IDSEL=A22) */
+                /* NOTE: JMR3927 JP1 must be set to OPEN */
+                irq = (irq + 0) % 4;
+        } else {
+                /* PCI Backplane */
+                if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
+                        irq = (irq + 33 - slot) % 4;
+                else
+                        irq = (irq + 3 + slot) % 4;
+        }
+        irq++;                  /* 1-4 */
+
+        switch (irq) {
+        case 1:
+                irq = JMR3927_IRQ_IOC_PCIA;
+                break;
+        case 2:
+                irq = JMR3927_IRQ_IOC_PCIB;
+                break;
+        case 3:
+                irq = JMR3927_IRQ_IOC_PCIC;
+                break;
+        case 4:
+                irq = JMR3927_IRQ_IOC_PCID;
+                break;
+        }
+
+        /* Check OnBoard Ethernet (IDSEL=A24, DevNu=13) */
+        if (dev->bus->parent == NULL &&
+            slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(24))
+                irq = JMR3927_IRQ_ETHER0;
+        return irq;
+}