1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Common PowerQUICC II code. 4 * 5 * Author: Scott Wood <scottwood@freescale.com> 6 * Copyright (c) 2007 Freescale Semiconductor 7 * 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. 11 */ 12 13 #include <asm/cpm2.h> 14 #include <asm/io.h> 15 #include <asm/pci-bridge.h> 16 17 #include <platforms/82xx/pq2.h> 18 19 #define RMR_CSRE 0x00000001 20 21 void __noreturn pq2_restart(char *cmd) 22 { 23 local_irq_disable(); 24 setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE); 25 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]); 29 30 panic("Restart failed\n"); 31 } 32 33 #ifdef CONFIG_PCI 34 static int pq2_pci_exclude_device(struct pci_controller *hose, 35 u_char bus, u8 devfn) 36 { 37 if (bus == 0 && PCI_SLOT(devfn) == 0) 38 return PCIBIOS_DEVICE_NOT_FOUND; 39 else 40 return PCIBIOS_SUCCESSFUL; 41 } 42 43 static void __init pq2_pci_add_bridge(struct device_node *np) 44 { 45 struct pci_controller *hose; 46 struct resource r; 47 48 if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b) 49 goto err; 50 51 pci_add_flags(PCI_REASSIGN_ALL_BUS); 52 53 hose = pcibios_alloc_controller(np); 54 if (!hose) 55 return; 56 57 hose->dn = np; 58 59 setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0); 60 pci_process_bridge_OF_ranges(hose, np, 1); 61 62 return; 63 64 err: 65 printk(KERN_ERR "No valid PCI reg property in device tree\n"); 66 } 67 68 void __init pq2_init_pci(void) 69 { 70 struct device_node *np; 71 72 ppc_md.pci_exclude_device = pq2_pci_exclude_device; 73 74 for_each_compatible_node(np, NULL, "fsl,pq2-pci") 75 pq2_pci_add_bridge(np); 76 } 77 #endif 78