MIPS: TXx9: Add TX4939 SoC support

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 create mode 100644 arch/mips/pci/pci-tx4939.c
 create mode 100644 arch/mips/txx9/generic/irq_tx4939.c
 create mode 100644 arch/mips/txx9/generic/setup_tx4939.c
 create mode 100644 include/asm-mips/txx9/tx4939.h

1 files changed, 109 insertions, 0 deletions

diff --git a/arch/mips/pci/pci-tx4939.c b/arch/mips/pci/pci-tx4939.c
new file mode 100644
index 000000000000..5fecf1cdc325
--- /dev/null
+++ b/arch/mips/pci/pci-tx4939.c
@@ -0,0 +1,109 @@
+/*
+ * linux/arch/mips/pci/pci-tx4939.c
+ *
+ * Based on linux/arch/mips/txx9/rbtx4939/setup.c,
+ *          and RBTX49xx patch from CELF patch archive.
+ *
+ * Copyright 2001, 2003-2005 MontaVista Software Inc.
+ * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
+ * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <asm/txx9/generic.h>
+#include <asm/txx9/tx4939.h>
+
+int __init tx4939_report_pciclk(void)
+{
+        int pciclk = 0;
+
+        pr_info("PCIC --%s PCICLK:",
+                (__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66) ?
+                " PCI66" : "");
+        if (__raw_readq(&tx4939_ccfgptr->pcfg) & TX4939_PCFG_PCICLKEN_ALL) {
+                pciclk = txx9_master_clock * 20 / 6;
+                if (!(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66))
+                        pciclk /= 2;
+                printk(KERN_CONT "Internal(%u.%uMHz)",
+                       (pciclk + 50000) / 1000000,
+                       ((pciclk + 50000) / 100000) % 10);
+        } else {
+                printk(KERN_CONT "External");
+                pciclk = -1;
+        }
+        printk(KERN_CONT "\n");
+        return pciclk;
+}
+
+void __init tx4939_report_pci1clk(void)
+{
+        unsigned int pciclk = txx9_master_clock * 20 / 6;
+
+        pr_info("PCIC1 -- PCICLK:%u.%uMHz\n",
+                (pciclk + 50000) / 1000000,
+                ((pciclk + 50000) / 100000) % 10);
+}
+
+int __init tx4939_pcic1_map_irq(const struct pci_dev *dev, u8 slot)
+{
+        if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4939_pcic1ptr) {
+                switch (slot) {
+                case TX4927_PCIC_IDSEL_AD_TO_SLOT(31):
+                        if (__raw_readq(&tx4939_ccfgptr->pcfg) &
+                            TX4939_PCFG_ET0MODE)
+                                return TXX9_IRQ_BASE + TX4939_IR_ETH(0);
+                        break;
+                case TX4927_PCIC_IDSEL_AD_TO_SLOT(30):
+                        if (__raw_readq(&tx4939_ccfgptr->pcfg) &
+                            TX4939_PCFG_ET1MODE)
+                                return TXX9_IRQ_BASE + TX4939_IR_ETH(1);
+                        break;
+                }
+                return 0;
+        }
+        return -1;
+}
+
+int __init tx4939_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+        int irq = tx4939_pcic1_map_irq(dev, slot);
+
+        if (irq >= 0)
+                return irq;
+        irq = pin;
+        /* IRQ rotation */
+        irq--;  /* 0-3 */
+        irq = (irq + 33 - slot) % 4;
+        irq++;  /* 1-4 */
+
+        switch (irq) {
+        case 1:
+                irq = TXX9_IRQ_BASE + TX4939_IR_INTA;
+                break;
+        case 2:
+                irq = TXX9_IRQ_BASE + TX4939_IR_INTB;
+                break;
+        case 3:
+                irq = TXX9_IRQ_BASE + TX4939_IR_INTC;
+                break;
+        case 4:
+                irq = TXX9_IRQ_BASE + TX4939_IR_INTD;
+                break;
+        }
+        return irq;
+}
+
+void __init tx4939_setup_pcierr_irq(void)
+{
+        if (request_irq(TXX9_IRQ_BASE + TX4939_IR_PCIERR,
+                        tx4927_pcierr_interrupt,
+                        IRQF_DISABLED, "PCI error",
+                        (void *)TX4939_PCIC_REG))
+                pr_warning("Failed to request irq for PCIERR\n");
+}