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};