1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Common PowerQUICC II code.
5 * Author: Scott Wood <scottwood@freescale.com>
6 * Copyright (c) 2007 Freescale Semiconductor
8 * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
9 * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
10 * Copyright (c) 2006 MontaVista Software, Inc.
15 #include <asm/pci-bridge.h>
17 #include <platforms/82xx/pq2.h>
19 #define RMR_CSRE 0x00000001
21 void __noreturn pq2_restart(char *cmd)
24 setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
26 /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
27 mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
28 in_8(&cpm2_immr->im_clkrst.res[0]);
30 panic("Restart failed\n");
34 static int pq2_pci_exclude_device(struct pci_controller *hose,
37 if (bus == 0 && PCI_SLOT(devfn) == 0)
38 return PCIBIOS_DEVICE_NOT_FOUND;
40 return PCIBIOS_SUCCESSFUL;
43 static void __init pq2_pci_add_bridge(struct device_node *np)
45 struct pci_controller *hose;
48 if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
51 pci_add_flags(PCI_REASSIGN_ALL_BUS);
53 hose = pcibios_alloc_controller(np);
59 setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
60 pci_process_bridge_OF_ranges(hose, np, 1);
65 printk(KERN_ERR "No valid PCI reg property in device tree\n");
68 void __init pq2_init_pci(void)
70 struct device_node *np;
72 ppc_md.pci_exclude_device = pq2_pci_exclude_device;
74 for_each_compatible_node(np, NULL, "fsl,pq2-pci")
75 pq2_pci_add_bridge(np);