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-rw-r--r--arch/powerpc/platforms/82xx/pq2.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/82xx/pq2.c b/arch/powerpc/platforms/82xx/pq2.c
new file mode 100644
index 000000000..3b5cb39a5
--- /dev/null
+++ b/arch/powerpc/platforms/82xx/pq2.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Common PowerQUICC II code.
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ * Copyright (c) 2007 Freescale Semiconductor
+ *
+ * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
+ * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
+ * Copyright (c) 2006 MontaVista Software, Inc.
+ */
+
+#include <linux/kprobes.h>
+
+#include <asm/cpm2.h>
+#include <asm/io.h>
+#include <asm/pci-bridge.h>
+
+#include <platforms/82xx/pq2.h>
+
+#define RMR_CSRE 0x00000001
+
+void __noreturn pq2_restart(char *cmd)
+{
+ local_irq_disable();
+ setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
+
+ /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
+ mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
+ in_8(&cpm2_immr->im_clkrst.res[0]);
+
+ panic("Restart failed\n");
+}
+NOKPROBE_SYMBOL(pq2_restart)
+
+#ifdef CONFIG_PCI
+static int pq2_pci_exclude_device(struct pci_controller *hose,
+ u_char bus, u8 devfn)
+{
+ if (bus == 0 && PCI_SLOT(devfn) == 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ else
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static void __init pq2_pci_add_bridge(struct device_node *np)
+{
+ struct pci_controller *hose;
+ struct resource r;
+
+ if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
+ goto err;
+
+ pci_add_flags(PCI_REASSIGN_ALL_BUS);
+
+ hose = pcibios_alloc_controller(np);
+ if (!hose)
+ return;
+
+ hose->dn = np;
+
+ setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
+ pci_process_bridge_OF_ranges(hose, np, 1);
+
+ return;
+
+err:
+ printk(KERN_ERR "No valid PCI reg property in device tree\n");
+}
+
+void __init pq2_init_pci(void)
+{
+ struct device_node *np;
+
+ ppc_md.pci_exclude_device = pq2_pci_exclude_device;
+
+ for_each_compatible_node(np, NULL, "fsl,pq2-pci")
+ pq2_pci_add_bridge(np);
+}
+#endif