1/*
2 * Freescale Lite5200 board support
3 *
4 * Written by: Grant Likely <grant.likely@secretlab.ca>
5 *
6 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
7 * Copyright 2006 Freescale Semiconductor, Inc. All rights reserved.
8 *
9 * Description:
10 * This program is free software; you can redistribute  it and/or modify it
11 * under  the terms of  the GNU General  Public License as published by the
12 * Free Software Foundation;  either version 2 of the  License, or (at your
13 * option) any later version.
14 */
15
16#undef DEBUG
17
18#include <linux/init.h>
19#include <linux/pci.h>
20#include <linux/of.h>
21#include <linux/of_address.h>
22#include <linux/root_dev.h>
23#include <linux/initrd.h>
24#include <asm/time.h>
25#include <asm/io.h>
26#include <asm/machdep.h>
27#include <asm/prom.h>
28#include <asm/mpc52xx.h>
29
30/* ************************************************************************
31 *
32 * Setup the architecture
33 *
34 */
35
36/* mpc5200 device tree match tables */
37static const struct of_device_id mpc5200_cdm_ids[] __initconst = {
38	{ .compatible = "fsl,mpc5200-cdm", },
39	{ .compatible = "mpc5200-cdm", },
40	{}
41};
42
43static const struct of_device_id mpc5200_gpio_ids[] __initconst = {
44	{ .compatible = "fsl,mpc5200-gpio", },
45	{ .compatible = "mpc5200-gpio", },
46	{}
47};
48
49/*
50 * Fix clock configuration.
51 *
52 * Firmware is supposed to be responsible for this.  If you are creating a
53 * new board port, do *NOT* duplicate this code.  Fix your boot firmware
54 * to set it correctly in the first place
55 */
56static void __init
57lite5200_fix_clock_config(void)
58{
59	struct device_node *np;
60	struct mpc52xx_cdm  __iomem *cdm;
61	/* Map zones */
62	np = of_find_matching_node(NULL, mpc5200_cdm_ids);
63	cdm = of_iomap(np, 0);
64	of_node_put(np);
65	if (!cdm) {
66		printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
67		       __func__);
68		return;
69	}
70
71	/* Use internal 48 Mhz */
72	out_8(&cdm->ext_48mhz_en, 0x00);
73	out_8(&cdm->fd_enable, 0x01);
74	if (in_be32(&cdm->rstcfg) & 0x40)	/* Assumes 33Mhz clock */
75		out_be16(&cdm->fd_counters, 0x0001);
76	else
77		out_be16(&cdm->fd_counters, 0x5555);
78
79	/* Unmap the regs */
80	iounmap(cdm);
81}
82
83/*
84 * Fix setting of port_config register.
85 *
86 * Firmware is supposed to be responsible for this.  If you are creating a
87 * new board port, do *NOT* duplicate this code.  Fix your boot firmware
88 * to set it correctly in the first place
89 */
90static void __init
91lite5200_fix_port_config(void)
92{
93	struct device_node *np;
94	struct mpc52xx_gpio __iomem *gpio;
95	u32 port_config;
96
97	np = of_find_matching_node(NULL, mpc5200_gpio_ids);
98	gpio = of_iomap(np, 0);
99	of_node_put(np);
100	if (!gpio) {
101		printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
102		       __func__);
103		return;
104	}
105
106	/* Set port config */
107	port_config = in_be32(&gpio->port_config);
108
109	port_config &= ~0x00800000;	/* 48Mhz internal, pin is GPIO	*/
110
111	port_config &= ~0x00007000;	/* USB port : Differential mode	*/
112	port_config |=  0x00001000;	/*            USB 1 only	*/
113
114	port_config &= ~0x03000000;	/* ATA CS is on csb_4/5		*/
115	port_config |=  0x01000000;
116
117	pr_debug("port_config: old:%x new:%x\n",
118	         in_be32(&gpio->port_config), port_config);
119	out_be32(&gpio->port_config, port_config);
120
121	/* Unmap zone */
122	iounmap(gpio);
123}
124
125#ifdef CONFIG_PM
126static void lite5200_suspend_prepare(void __iomem *mbar)
127{
128	u8 pin = 1;	/* GPIO_WKUP_1 (GPIO_PSC2_4) */
129	u8 level = 0;	/* wakeup on low level */
130	mpc52xx_set_wakeup_gpio(pin, level);
131
132	/*
133	 * power down usb port
134	 * this needs to be called before of-ohci suspend code
135	 */
136
137	/* set ports to "power switched" and "powered at the same time"
138	 * USB Rh descriptor A: NPS = 0, PSM = 0 */
139	out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
140	/* USB Rh status: LPS = 1 - turn off power */
141	out_be32(mbar + 0x1050, 0x00000001);
142}
143
144static void lite5200_resume_finish(void __iomem *mbar)
145{
146	/* USB Rh status: LPSC = 1 - turn on power */
147	out_be32(mbar + 0x1050, 0x00010000);
148}
149#endif
150
151static void __init lite5200_setup_arch(void)
152{
153	if (ppc_md.progress)
154		ppc_md.progress("lite5200_setup_arch()", 0);
155
156	/* Map important registers from the internal memory map */
157	mpc52xx_map_common_devices();
158
159	/* Some mpc5200 & mpc5200b related configuration */
160	mpc5200_setup_xlb_arbiter();
161
162	/* Fix things that firmware should have done. */
163	lite5200_fix_clock_config();
164	lite5200_fix_port_config();
165
166#ifdef CONFIG_PM
167	mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
168	mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
169	lite5200_pm_init();
170#endif
171
172	mpc52xx_setup_pci();
173}
174
175static const char * const board[] __initconst = {
176	"fsl,lite5200",
177	"fsl,lite5200b",
178	NULL,
179};
180
181/*
182 * Called very early, MMU is off, device-tree isn't unflattened
183 */
184static int __init lite5200_probe(void)
185{
186	return of_flat_dt_match(of_get_flat_dt_root(), board);
187}
188
189define_machine(lite5200) {
190	.name 		= "lite5200",
191	.probe 		= lite5200_probe,
192	.setup_arch 	= lite5200_setup_arch,
193	.init		= mpc52xx_declare_of_platform_devices,
194	.init_IRQ 	= mpc52xx_init_irq,
195	.get_irq 	= mpc52xx_get_irq,
196	.restart	= mpc52xx_restart,
197	.calibrate_decr	= generic_calibrate_decr,
198};
199