1 /* 2 * Common PowerQUICC II code. 3 * 4 * Author: Scott Wood <scottwood@freescale.com> 5 * Copyright (c) 2007 Freescale Semiconductor 6 * 7 * Based on code by Vitaly Bordug <vbordug@ru.mvista.com> 8 * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com> 9 * Copyright (c) 2006 MontaVista Software, Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 */ 16 17 #include <asm/cpm2.h> 18 #include <asm/io.h> 19 #include <asm/pci-bridge.h> 20 #include <asm/system.h> 21 22 #include <platforms/82xx/pq2.h> 23 24 #define RMR_CSRE 0x00000001 25 26 void pq2_restart(char *cmd) 27 { 28 local_irq_disable(); 29 setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE); 30 31 /* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */ 32 mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR)); 33 in_8(&cpm2_immr->im_clkrst.res[0]); 34 35 panic("Restart failed\n"); 36 } 37 38 #ifdef CONFIG_PCI 39 static int pq2_pci_exclude_device(struct pci_controller *hose, 40 u_char bus, u8 devfn) 41 { 42 if (bus == 0 && PCI_SLOT(devfn) == 0) 43 return PCIBIOS_DEVICE_NOT_FOUND; 44 else 45 return PCIBIOS_SUCCESSFUL; 46 } 47 48 static void __init pq2_pci_add_bridge(struct device_node *np) 49 { 50 struct pci_controller *hose; 51 struct resource r; 52 53 if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b) 54 goto err; 55 56 pci_assign_all_buses = 1; 57 58 hose = pcibios_alloc_controller(np); 59 if (!hose) 60 return; 61 62 hose->arch_data = np; 63 64 setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0); 65 pci_process_bridge_OF_ranges(hose, np, 1); 66 67 return; 68 69 err: 70 printk(KERN_ERR "No valid PCI reg property in device tree\n"); 71 } 72 73 void __init pq2_init_pci(void) 74 { 75 struct device_node *np = NULL; 76 77 ppc_md.pci_exclude_device = pq2_pci_exclude_device; 78 79 while ((np = of_find_compatible_node(np, NULL, "fsl,pq2-pci"))) 80 pq2_pci_add_bridge(np); 81 } 82 #endif 83