1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Board setup routines for the Emerson/Artesyn MVME7100
4 *
5 * Copyright 2016 Elettra-Sincrotrone Trieste S.C.p.A.
6 *
7 * Author: Alessio Igor Bogani <alessio.bogani@elettra.eu>
8 *
9 * Based on earlier code by:
10 *
11 * Ajit Prem <ajit.prem@emerson.com>
12 * Copyright 2008 Emerson
13 *
14 * USB host fixup is borrowed by:
15 *
16 * Martyn Welch <martyn.welch@ge.com>
17 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
18 */
19
20#include <linux/pci.h>
21#include <linux/of.h>
22#include <linux/of_fdt.h>
23#include <linux/of_address.h>
24#include <asm/udbg.h>
25#include <asm/mpic.h>
26#include <sysdev/fsl_soc.h>
27#include <sysdev/fsl_pci.h>
28
29#include "mpc86xx.h"
30
31#define MVME7100_INTERRUPT_REG_2_OFFSET 0x05
32#define MVME7100_DS1375_MASK 0x40
33#define MVME7100_MAX6649_MASK 0x20
34#define MVME7100_ABORT_MASK 0x10
35
36/*
37 * Setup the architecture
38 */
39static void __init mvme7100_setup_arch(void)
40{
41 struct device_node *bcsr_node;
42 void __iomem *mvme7100_regs = NULL;
43 u8 reg;
44
45 if (ppc_md.progress)
46 ppc_md.progress("mvme7100_setup_arch()", 0);
47
48#ifdef CONFIG_SMP
49 mpc86xx_smp_init();
50#endif
51
52 fsl_pci_assign_primary();
53
54 /* Remap BCSR registers */
55 bcsr_node = of_find_compatible_node(NULL, NULL,
56 compat: "artesyn,mvme7100-bcsr");
57 if (bcsr_node) {
58 mvme7100_regs = of_iomap(node: bcsr_node, index: 0);
59 of_node_put(node: bcsr_node);
60 }
61
62 if (mvme7100_regs) {
63 /* Disable ds1375, max6649, and abort interrupts */
64 reg = readb(addr: mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET);
65 reg |= MVME7100_DS1375_MASK | MVME7100_MAX6649_MASK
66 | MVME7100_ABORT_MASK;
67 writeb(val: reg, addr: mvme7100_regs + MVME7100_INTERRUPT_REG_2_OFFSET);
68 } else
69 pr_warn("Unable to map board registers\n");
70
71 pr_info("MVME7100 board from Artesyn\n");
72}
73
74/*
75 * Called very early, device-tree isn't unflattened
76 */
77static int __init mvme7100_probe(void)
78{
79 unsigned long root = of_get_flat_dt_root();
80
81 return of_flat_dt_is_compatible(node: root, name: "artesyn,MVME7100");
82}
83
84static void mvme7100_usb_host_fixup(struct pci_dev *pdev)
85{
86 unsigned int val;
87
88 if (!machine_is(mvme7100))
89 return;
90
91 /* Ensure only ports 1 & 2 are enabled */
92 pci_read_config_dword(dev: pdev, where: 0xe0, val: &val);
93 pci_write_config_dword(dev: pdev, where: 0xe0, val: (val & ~7) | 0x2);
94
95 /* System clock is 48-MHz Oscillator and EHCI Enabled. */
96 pci_write_config_dword(dev: pdev, where: 0xe4, val: 1 << 5);
97}
98DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
99 mvme7100_usb_host_fixup);
100
101machine_arch_initcall(mvme7100, mpc86xx_common_publish_devices);
102
103define_machine(mvme7100) {
104 .name = "MVME7100",
105 .probe = mvme7100_probe,
106 .setup_arch = mvme7100_setup_arch,
107 .init_IRQ = mpc86xx_init_irq,
108 .get_irq = mpic_get_irq,
109 .time_init = mpc86xx_time_init,
110 .progress = udbg_progress,
111#ifdef CONFIG_PCI
112 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
113#endif
114};
115

source code of linux/arch/powerpc/platforms/86xx/mvme7100.c