1/*
2 * arch/powerpc/platforms/83xx/mpc837x_mds.c
3 *
4 * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
5 *
6 * MPC837x MDS board specific routines
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation;  either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/pci.h>
15#include <linux/of.h>
16#include <linux/of_platform.h>
17
18#include <asm/time.h>
19#include <asm/ipic.h>
20#include <asm/udbg.h>
21#include <asm/prom.h>
22#include <sysdev/fsl_pci.h>
23
24#include "mpc83xx.h"
25
26#define BCSR12_USB_SER_MASK	0x8a
27#define BCSR12_USB_SER_PIN	0x80
28#define BCSR12_USB_SER_DEVICE	0x02
29
30static int mpc837xmds_usb_cfg(void)
31{
32	struct device_node *np;
33	const void *phy_type, *mode;
34	void __iomem *bcsr_regs = NULL;
35	u8 bcsr12;
36	int ret;
37
38	ret = mpc837x_usb_cfg();
39	if (ret)
40		return ret;
41	/* Map BCSR area */
42	np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
43	if (np) {
44		bcsr_regs = of_iomap(np, 0);
45		of_node_put(np);
46	}
47	if (!bcsr_regs)
48		return -1;
49
50	np = of_find_node_by_name(NULL, "usb");
51	if (!np) {
52		ret = -ENODEV;
53		goto out;
54	}
55	phy_type = of_get_property(np, "phy_type", NULL);
56	if (phy_type && !strcmp(phy_type, "ulpi")) {
57		clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
58	} else if (phy_type && !strcmp(phy_type, "serial")) {
59		mode = of_get_property(np, "dr_mode", NULL);
60		bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
61		bcsr12 |= BCSR12_USB_SER_PIN;
62		if (mode && !strcmp(mode, "peripheral"))
63			bcsr12 |= BCSR12_USB_SER_DEVICE;
64		out_8(bcsr_regs + 12, bcsr12);
65	} else {
66		printk(KERN_ERR "USB DR: unsupported PHY\n");
67	}
68
69	of_node_put(np);
70out:
71	iounmap(bcsr_regs);
72	return ret;
73}
74
75/* ************************************************************************
76 *
77 * Setup the architecture
78 *
79 */
80static void __init mpc837x_mds_setup_arch(void)
81{
82	if (ppc_md.progress)
83		ppc_md.progress("mpc837x_mds_setup_arch()", 0);
84
85	mpc83xx_setup_pci();
86	mpc837xmds_usb_cfg();
87}
88
89machine_device_initcall(mpc837x_mds, mpc83xx_declare_of_platform_devices);
90
91/*
92 * Called very early, MMU is off, device-tree isn't unflattened
93 */
94static int __init mpc837x_mds_probe(void)
95{
96        unsigned long root = of_get_flat_dt_root();
97
98        return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
99}
100
101define_machine(mpc837x_mds) {
102	.name			= "MPC837x MDS",
103	.probe			= mpc837x_mds_probe,
104	.setup_arch		= mpc837x_mds_setup_arch,
105	.init_IRQ		= mpc83xx_ipic_init_IRQ,
106	.get_irq		= ipic_get_irq,
107	.restart		= mpc83xx_restart,
108	.time_init		= mpc83xx_time_init,
109	.calibrate_decr		= generic_calibrate_decr,
110	.progress		= udbg_progress,
111};
112