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
pq2_restart(char * cmd)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 }
NOKPROBE_SYMBOL(pq2_restart)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
pq2_pci_add_bridge(struct device_node * np)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
pq2_init_pci(void)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