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 <linux/kprobes.h> 14 15 #include <asm/cpm2.h> 16 #include <asm/io.h> 17 #include <asm/pci-bridge.h> 18 19 #include <platforms/82xx/pq2.h> 20 21 #define RMR_CSRE 0x00000001 22 23 void __noreturn pq2_restart(char *cmd) 24 { 25 local_irq_disable(); 26 setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE); 27 28 /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */ 29 mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR)); 30 in_8(&cpm2_immr->im_clkrst.res[0]); 31 32 panic("Restart failed\n"); 33 } 34 NOKPROBE_SYMBOL(pq2_restart) 35 36 #ifdef CONFIG_PCI 37 static int pq2_pci_exclude_device(struct pci_controller *hose, 38 u_char bus, u8 devfn) 39 { 40 if (bus == 0 && PCI_SLOT(devfn) == 0) 41 return PCIBIOS_DEVICE_NOT_FOUND; 42 else 43 return PCIBIOS_SUCCESSFUL; 44 } 45 46 static void __init pq2_pci_add_bridge(struct device_node *np) 47 { 48 struct pci_controller *hose; 49 struct resource r; 50 51 if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b) 52 goto err; 53 54 pci_add_flags(PCI_REASSIGN_ALL_BUS); 55 56 hose = pcibios_alloc_controller(np); 57 if (!hose) 58 return; 59 60 hose->dn = np; 61 62 setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0); 63 pci_process_bridge_OF_ranges(hose, np, 1); 64 65 return; 66 67 err: 68 printk(KERN_ERR "No valid PCI reg property in device tree\n"); 69 } 70 71 void __init pq2_init_pci(void) 72 { 73 struct device_node *np; 74 75 ppc_md.pci_exclude_device = pq2_pci_exclude_device; 76 77 for_each_compatible_node(np, NULL, "fsl,pq2-pci") 78 pq2_pci_add_bridge(np); 79 } 80 #endif 81