1/*
2 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
3 *
4 * Author: Michael Johnston <michael.johnston@freescale.com>
5 *
6 * Description:
7 * TWR-P102x Board Setup
8 *
9 * This program is free software; you can redistribute  it and/or modify it
10 * under  the terms of  the GNU General  Public License as published by the
11 * Free Software Foundation;  either version 2 of the  License, or (at your
12 * option) any later version.
13 */
14
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/errno.h>
18#include <linux/fsl/guts.h>
19#include <linux/pci.h>
20#include <linux/of_platform.h>
21
22#include <asm/pci-bridge.h>
23#include <asm/udbg.h>
24#include <asm/mpic.h>
25#include <asm/qe.h>
26#include <asm/qe_ic.h>
27
28#include <sysdev/fsl_soc.h>
29#include <sysdev/fsl_pci.h>
30#include "smp.h"
31
32#include "mpc85xx.h"
33
34static void __init twr_p1025_pic_init(void)
35{
36	struct mpic *mpic;
37
38#ifdef CONFIG_QUICC_ENGINE
39	struct device_node *np;
40#endif
41
42	mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
43			MPIC_SINGLE_DEST_CPU,
44			0, 256, " OpenPIC  ");
45
46	BUG_ON(mpic == NULL);
47	mpic_init(mpic);
48
49#ifdef CONFIG_QUICC_ENGINE
50	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
51	if (np) {
52		qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
53				qe_ic_cascade_high_mpic);
54		of_node_put(np);
55	} else
56		pr_err("Could not find qe-ic node\n");
57#endif
58}
59
60/* ************************************************************************
61 *
62 * Setup the architecture
63 *
64 */
65static void __init twr_p1025_setup_arch(void)
66{
67#ifdef CONFIG_QUICC_ENGINE
68	struct device_node *np;
69#endif
70
71	if (ppc_md.progress)
72		ppc_md.progress("twr_p1025_setup_arch()", 0);
73
74	mpc85xx_smp_init();
75
76	fsl_pci_assign_primary();
77
78#ifdef CONFIG_QUICC_ENGINE
79	mpc85xx_qe_init();
80	mpc85xx_qe_par_io_init();
81
82#if IS_ENABLED(CONFIG_UCC_GETH) || IS_ENABLED(CONFIG_SERIAL_QE)
83	if (machine_is(twr_p1025)) {
84		struct ccsr_guts __iomem *guts;
85
86		np = of_find_compatible_node(NULL, NULL, "fsl,p1021-guts");
87		if (np) {
88			guts = of_iomap(np, 0);
89			if (!guts)
90				pr_err("twr_p1025: could not map global utilities register\n");
91			else {
92			/* P1025 has pins muxed for QE and other functions. To
93			 * enable QE UEC mode, we need to set bit QE0 for UCC1
94			 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
95			 * and QE12 for QE MII management signals in PMUXCR
96			 * register.
97			 * Set QE mux bits in PMUXCR */
98			setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
99					MPC85xx_PMUXCR_QE(3) |
100					MPC85xx_PMUXCR_QE(9) |
101					MPC85xx_PMUXCR_QE(12));
102			iounmap(guts);
103
104#if IS_ENABLED(CONFIG_SERIAL_QE)
105			/* On P1025TWR board, the UCC7 acted as UART port.
106			 * However, The UCC7's CTS pin is low level in default,
107			 * it will impact the transmission in full duplex
108			 * communication. So disable the Flow control pin PA18.
109			 * The UCC7 UART just can use RXD and TXD pins.
110			 */
111			par_io_config_pin(0, 18, 0, 0, 0, 0);
112#endif
113			/* Drive PB29 to CPLD low - CPLD will then change
114			 * muxing from LBC to QE */
115			par_io_config_pin(1, 29, 1, 0, 0, 0);
116			par_io_data_set(1, 29, 0);
117			}
118			of_node_put(np);
119		}
120	}
121#endif
122#endif	/* CONFIG_QUICC_ENGINE */
123
124	pr_info("TWR-P1025 board from Freescale Semiconductor\n");
125}
126
127machine_arch_initcall(twr_p1025, mpc85xx_common_publish_devices);
128
129static int __init twr_p1025_probe(void)
130{
131	unsigned long root = of_get_flat_dt_root();
132
133	return of_flat_dt_is_compatible(root, "fsl,TWR-P1025");
134}
135
136define_machine(twr_p1025) {
137	.name			= "TWR-P1025",
138	.probe			= twr_p1025_probe,
139	.setup_arch		= twr_p1025_setup_arch,
140	.init_IRQ		= twr_p1025_pic_init,
141#ifdef CONFIG_PCI
142	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
143#endif
144	.get_irq		= mpic_get_irq,
145	.restart		= fsl_rstcr_restart,
146	.calibrate_decr		= generic_calibrate_decr,
147	.progress		= udbg_progress,
148};
149