summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/85xx/tqm85xx.c
blob: 325de772725a6076a747dfc08ce132f8a34e67c4 (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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
/*
 * Based on MPC8560 ADS and arch/ppc tqm85xx ports
 *
 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
 *
 * Copyright 2008 Freescale Semiconductor Inc.
 *
 * Copyright (c) 2005-2006 DENX Software Engineering
 * Stefan Roese <sr@denx.de>
 *
 * Based on original work by
 * 	Kumar Gala <kumar.gala@freescale.com>
 *      Copyright 2004 Freescale Semiconductor Inc.
 *
 * 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.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of_platform.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpic.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>

#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#ifdef CONFIG_CPM2
#include <asm/cpm2.h>
#include <sysdev/cpm2_pic.h>

static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
{
	struct irq_chip *chip = irq_desc_get_chip(desc);
	int cascade_irq;

	while ((cascade_irq = cpm2_get_irq()) >= 0)
		generic_handle_irq(cascade_irq);

	chip->irq_eoi(&desc->irq_data);
}
#endif /* CONFIG_CPM2 */

static void __init tqm85xx_pic_init(void)
{
	struct mpic *mpic;
	struct resource r;
	struct device_node *np;
#ifdef CONFIG_CPM2
	int irq;
#endif

	np = of_find_node_by_type(NULL, "open-pic");
	if (!np) {
		printk(KERN_ERR "Could not find open-pic node\n");
		return;
	}

	if (of_address_to_resource(np, 0, &r)) {
		printk(KERN_ERR "Could not map mpic register space\n");
		of_node_put(np);
		return;
	}

	mpic = mpic_alloc(np, r.start,
			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
			0, 256, " OpenPIC  ");
	BUG_ON(mpic == NULL);
	of_node_put(np);

	mpic_init(mpic);

#ifdef CONFIG_CPM2
	/* Setup CPM2 PIC */
	np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
	if (np == NULL) {
		printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
		return;
	}
	irq = irq_of_parse_and_map(np, 0);

	if (irq == NO_IRQ) {
		of_node_put(np);
		printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
		return;
	}

	cpm2_pic_init(np);
	of_node_put(np);
	irq_set_chained_handler(irq, cpm2_cascade);
#endif
}

/*
 * Setup the architecture
 */
static void __init tqm85xx_setup_arch(void)
{
#ifdef CONFIG_PCI
	struct device_node *np;
#endif

	if (ppc_md.progress)
		ppc_md.progress("tqm85xx_setup_arch()", 0);

#ifdef CONFIG_CPM2
	cpm2_reset();
#endif

#ifdef CONFIG_PCI
	for_each_node_by_type(np, "pci") {
		if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
		    of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
			struct resource rsrc;
			if (!of_address_to_resource(np, 0, &rsrc)) {
				if ((rsrc.start & 0xfffff) == 0x8000)
					fsl_add_bridge(np, 1);
				else
					fsl_add_bridge(np, 0);
			}
		}
	}
#endif
}

static void tqm85xx_show_cpuinfo(struct seq_file *m)
{
	uint pvid, svid, phid1;

	pvid = mfspr(SPRN_PVR);
	svid = mfspr(SPRN_SVR);

	seq_printf(m, "Vendor\t\t: TQ Components\n");
	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
	seq_printf(m, "SVR\t\t: 0x%x\n", svid);

	/* Display cpu Pll setting */
	phid1 = mfspr(SPRN_HID1);
	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
}

static void __init tqm85xx_ti1520_fixup(struct pci_dev *pdev)
{
	unsigned int val;

	/* Do not do the fixup on other platforms! */
	if (!machine_is(tqm85xx))
		return;

	dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");

	/*
	 * Enable P2CCLK bit in system control register
	 * to enable CLOCK output to power chip
	 */
	pci_read_config_dword(pdev, 0x80, &val);
	pci_write_config_dword(pdev, 0x80, val | (1 << 27));

}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
		tqm85xx_ti1520_fixup);

static struct of_device_id __initdata of_bus_ids[] = {
	{ .compatible = "simple-bus", },
	{ .compatible = "gianfar", },
	{},
};

static int __init declare_of_platform_devices(void)
{
	of_platform_bus_probe(NULL, of_bus_ids, NULL);

	return 0;
}
machine_device_initcall(tqm85xx, declare_of_platform_devices);

static const char *board[] __initdata = {
	"tqc,tqm8540",
	"tqc,tqm8541",
	"tqc,tqm8548",
	"tqc,tqm8555",
	"tqc,tqm8560",
	NULL
};

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init tqm85xx_probe(void)
{
	return of_flat_dt_match(of_get_flat_dt_root(), board);
}

define_machine(tqm85xx) {
	.name			= "TQM85xx",
	.probe			= tqm85xx_probe,
	.setup_arch		= tqm85xx_setup_arch,
	.init_IRQ		= tqm85xx_pic_init,
	.show_cpuinfo		= tqm85xx_show_cpuinfo,
	.get_irq		= mpic_get_irq,
	.restart		= fsl_rstcr_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};