summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/85xx/twr_p102x.c
blob: 1eadb6d0dc6406acbe24a5b946fb4a62b104b83e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
/*
 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
 *
 * Author: Michael Johnston <michael.johnston@freescale.com>
 *
 * Description:
 * TWR-P102x Board Setup
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/of_platform.h>

#include <asm/pci-bridge.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <asm/qe.h>
#include <asm/qe_ic.h>
#include <asm/fsl_guts.h>

#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include "smp.h"

#include "mpc85xx.h"

static void __init twr_p1025_pic_init(void)
{
	struct mpic *mpic;

#ifdef CONFIG_QUICC_ENGINE
	struct device_node *np;
#endif

	mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
			MPIC_SINGLE_DEST_CPU,
			0, 256, " OpenPIC  ");

	BUG_ON(mpic == NULL);
	mpic_init(mpic);

#ifdef CONFIG_QUICC_ENGINE
	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
	if (np) {
		qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
				qe_ic_cascade_high_mpic);
		of_node_put(np);
	} else
		pr_err("Could not find qe-ic node\n");
#endif
}

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init twr_p1025_setup_arch(void)
{
#ifdef CONFIG_QUICC_ENGINE
	struct device_node *np;
#endif

	if (ppc_md.progress)
		ppc_md.progress("twr_p1025_setup_arch()", 0);

	mpc85xx_smp_init();

	fsl_pci_assign_primary();

#ifdef CONFIG_QUICC_ENGINE
	mpc85xx_qe_init();
	mpc85xx_qe_par_io_init();

#if defined(CONFIG_UCC_GETH) || defined(CONFIG_SERIAL_QE)
	if (machine_is(twr_p1025)) {
		struct ccsr_guts __iomem *guts;

		np = of_find_compatible_node(NULL, NULL, "fsl,p1021-guts");
		if (np) {
			guts = of_iomap(np, 0);
			if (!guts)
				pr_err("twr_p1025: could not map global utilities register\n");
			else {
			/* P1025 has pins muxed for QE and other functions. To
			 * enable QE UEC mode, we need to set bit QE0 for UCC1
			 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
			 * and QE12 for QE MII management signals in PMUXCR
			 * register.
			 * Set QE mux bits in PMUXCR */
			setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
					MPC85xx_PMUXCR_QE(3) |
					MPC85xx_PMUXCR_QE(9) |
					MPC85xx_PMUXCR_QE(12));
			iounmap(guts);

#if defined(CONFIG_SERIAL_QE)
			/* On P1025TWR board, the UCC7 acted as UART port.
			 * However, The UCC7's CTS pin is low level in default,
			 * it will impact the transmission in full duplex
			 * communication. So disable the Flow control pin PA18.
			 * The UCC7 UART just can use RXD and TXD pins.
			 */
			par_io_config_pin(0, 18, 0, 0, 0, 0);
#endif
			/* Drive PB29 to CPLD low - CPLD will then change
			 * muxing from LBC to QE */
			par_io_config_pin(1, 29, 1, 0, 0, 0);
			par_io_data_set(1, 29, 0);
			}
			of_node_put(np);
		}
	}
#endif
#endif	/* CONFIG_QUICC_ENGINE */

	pr_info("TWR-P1025 board from Freescale Semiconductor\n");
}

machine_arch_initcall(twr_p1025, mpc85xx_common_publish_devices);

static int __init twr_p1025_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	return of_flat_dt_is_compatible(root, "fsl,TWR-P1025");
}

define_machine(twr_p1025) {
	.name			= "TWR-P1025",
	.probe			= twr_p1025_probe,
	.setup_arch		= twr_p1025_setup_arch,
	.init_IRQ		= twr_p1025_pic_init,
#ifdef CONFIG_PCI
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
#endif
	.get_irq		= mpic_get_irq,
	.restart		= fsl_rstcr_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};