aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/52xx/lite5200.c
blob: 1cfc00dfb99a656f488249ea71adbe258084832b (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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/*
 * Freescale Lite5200 board support
 *
 * Written by: Grant Likely <grant.likely@secretlab.ca>
 *
 * Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
 * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
 *
 * Description:
 * 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.
 */

#undef DEBUG

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>

#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ipic.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
#include <asm/of_platform.h>

#include <asm/mpc52xx.h>

/* ************************************************************************
 *
 * Setup the architecture
 *
 */

static void __init
lite5200_setup_cpu(void)
{
	struct mpc52xx_gpio __iomem *gpio;
	u32 port_config;

	/* Map zones */
	gpio = mpc52xx_find_and_map("mpc5200-gpio");
	if (!gpio) {
		printk(KERN_ERR __FILE__ ": "
			"Error while mapping GPIO register for port config. "
			"Expect some abnormal behavior\n");
		goto error;
	}

	/* Set port config */
	port_config = in_be32(&gpio->port_config);

	port_config &= ~0x00800000;	/* 48Mhz internal, pin is GPIO	*/

	port_config &= ~0x00007000;	/* USB port : Differential mode	*/
	port_config |=  0x00001000;	/*            USB 1 only	*/

	port_config &= ~0x03000000;	/* ATA CS is on csb_4/5		*/
	port_config |=  0x01000000;

	pr_debug("port_config: old:%x new:%x\n",
	         in_be32(&gpio->port_config), port_config);
	out_be32(&gpio->port_config, port_config);

	/* Unmap zone */
error:
	iounmap(gpio);
}

#ifdef CONFIG_PM
static u32 descr_a;
static void lite5200_suspend_prepare(void __iomem *mbar)
{
	u8 pin = 1;	/* GPIO_WKUP_1 (GPIO_PSC2_4) */
	u8 level = 0;	/* wakeup on low level */
	mpc52xx_set_wakeup_gpio(pin, level);

	/*
	 * power down usb port
	 * this needs to be called before of-ohci suspend code
	 */
	descr_a = in_be32(mbar + 0x1048);
	out_be32(mbar + 0x1048, (descr_a & ~0x200) | 0x100);
}

static void lite5200_resume_finish(void __iomem *mbar)
{
	out_be32(mbar + 0x1048, descr_a);
}
#endif

static void __init lite5200_setup_arch(void)
{
	struct device_node *np;

	if (ppc_md.progress)
		ppc_md.progress("lite5200_setup_arch()", 0);

	np = of_find_node_by_type(NULL, "cpu");
	if (np) {
		const unsigned int *fp =
			of_get_property(np, "clock-frequency", NULL);
		if (fp != 0)
			loops_per_jiffy = *fp / HZ;
		else
			loops_per_jiffy = 50000000 / HZ;
		of_node_put(np);
	}

	/* CPU & Port mux setup */
	mpc52xx_setup_cpu();	/* Generic */
	lite5200_setup_cpu();	/* Platorm specific */

#ifdef CONFIG_PM
	mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
	mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
	mpc52xx_pm_init();
#endif

#ifdef CONFIG_PCI
	np = of_find_node_by_type(NULL, "pci");
	if (np) {
		mpc52xx_add_bridge(np);
		of_node_put(np);
	}
#endif

#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
		ROOT_DEV = Root_RAM0;
	else
#endif
#ifdef  CONFIG_ROOT_NFS
		ROOT_DEV = Root_NFS;
#else
		ROOT_DEV = Root_HDA1;
#endif

}

void lite5200_show_cpuinfo(struct seq_file *m)
{
	struct device_node* np = of_find_all_nodes(NULL);
	const char *model = NULL;

	if (np)
		model = of_get_property(np, "model", NULL);

	seq_printf(m, "vendor\t\t:	Freescale Semiconductor\n");
	seq_printf(m, "machine\t\t:	%s\n", model ? model : "unknown");

	of_node_put(np);
}

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init lite5200_probe(void)
{
	unsigned long node = of_get_flat_dt_root();
	const char *model = of_get_flat_dt_prop(node, "model", NULL);

	if (!of_flat_dt_is_compatible(node, "fsl,lite5200") &&
	    !of_flat_dt_is_compatible(node, "fsl,lite5200b"))
		return 0;
	pr_debug("%s board found\n", model ? model : "unknown");

	return 1;
}

define_machine(lite5200) {
	.name 		= "lite5200",
	.probe 		= lite5200_probe,
	.setup_arch 	= lite5200_setup_arch,
	.init		= mpc52xx_declare_of_platform_devices,
	.init_IRQ 	= mpc52xx_init_irq,
	.get_irq 	= mpc52xx_get_irq,
	.show_cpuinfo	= lite5200_show_cpuinfo,
	.calibrate_decr	= generic_calibrate_decr,
};