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
pq2_restart(char * cmd)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
pq2_pci_exclude_device(struct pci_controller * hose,u_char bus,u8 devfn)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
pq2_pci_add_bridge(struct device_node * np)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 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
57
58 hose = pcibios_alloc_controller(np);
59 if (!hose)
60 return;
61
62 hose->dn = 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
pq2_init_pci(void)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