1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Based on MPC8560 ADS and arch/ppc tqm85xx ports
4  *
5  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
6  *
7  * Copyright 2008 Freescale Semiconductor Inc.
8  *
9  * Copyright (c) 2005-2006 DENX Software Engineering
10  * Stefan Roese <sr@denx.de>
11  *
12  * Based on original work by
13  * 	Kumar Gala <kumar.gala@freescale.com>
14  *      Copyright 2004 Freescale Semiconductor Inc.
15  */
16 
17 #include <linux/stddef.h>
18 #include <linux/kernel.h>
19 #include <linux/pci.h>
20 #include <linux/kdev_t.h>
21 #include <linux/delay.h>
22 #include <linux/seq_file.h>
23 #include <linux/of_platform.h>
24 
25 #include <asm/time.h>
26 #include <asm/machdep.h>
27 #include <asm/pci-bridge.h>
28 #include <asm/mpic.h>
29 #include <mm/mmu_decl.h>
30 #include <asm/udbg.h>
31 
32 #include <sysdev/fsl_soc.h>
33 #include <sysdev/fsl_pci.h>
34 
35 #include "mpc85xx.h"
36 
37 #ifdef CONFIG_CPM2
38 #include <asm/cpm2.h>
39 #endif /* CONFIG_CPM2 */
40 
41 static void __init tqm85xx_pic_init(void)
42 {
43 	struct mpic *mpic = mpic_alloc(NULL, 0,
44 			MPIC_BIG_ENDIAN,
45 			0, 256, " OpenPIC  ");
46 	BUG_ON(mpic == NULL);
47 	mpic_init(mpic);
48 
49 	mpc85xx_cpm2_pic_init();
50 }
51 
52 /*
53  * Setup the architecture
54  */
55 static void __init tqm85xx_setup_arch(void)
56 {
57 	if (ppc_md.progress)
58 		ppc_md.progress("tqm85xx_setup_arch()", 0);
59 
60 #ifdef CONFIG_CPM2
61 	cpm2_reset();
62 #endif
63 
64 	fsl_pci_assign_primary();
65 }
66 
67 static void tqm85xx_show_cpuinfo(struct seq_file *m)
68 {
69 	uint pvid, svid, phid1;
70 
71 	pvid = mfspr(SPRN_PVR);
72 	svid = mfspr(SPRN_SVR);
73 
74 	seq_printf(m, "Vendor\t\t: TQ Components\n");
75 	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
76 	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
77 
78 	/* Display cpu Pll setting */
79 	phid1 = mfspr(SPRN_HID1);
80 	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
81 }
82 
83 static void tqm85xx_ti1520_fixup(struct pci_dev *pdev)
84 {
85 	unsigned int val;
86 
87 	/* Do not do the fixup on other platforms! */
88 	if (!machine_is(tqm85xx))
89 		return;
90 
91 	dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
92 
93 	/*
94 	 * Enable P2CCLK bit in system control register
95 	 * to enable CLOCK output to power chip
96 	 */
97 	pci_read_config_dword(pdev, 0x80, &val);
98 	pci_write_config_dword(pdev, 0x80, val | (1 << 27));
99 
100 }
101 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
102 		tqm85xx_ti1520_fixup);
103 
104 machine_arch_initcall(tqm85xx, mpc85xx_common_publish_devices);
105 
106 static const char * const board[] __initconst = {
107 	"tqc,tqm8540",
108 	"tqc,tqm8541",
109 	"tqc,tqm8548",
110 	"tqc,tqm8555",
111 	"tqc,tqm8560",
112 	NULL
113 };
114 
115 /*
116  * Called very early, device-tree isn't unflattened
117  */
118 static int __init tqm85xx_probe(void)
119 {
120 	return of_device_compatible_match(of_root, board);
121 }
122 
123 define_machine(tqm85xx) {
124 	.name			= "TQM85xx",
125 	.probe			= tqm85xx_probe,
126 	.setup_arch		= tqm85xx_setup_arch,
127 	.init_IRQ		= tqm85xx_pic_init,
128 	.show_cpuinfo		= tqm85xx_show_cpuinfo,
129 	.get_irq		= mpic_get_irq,
130 	.progress		= udbg_progress,
131 };
132