summaryrefslogtreecommitdiffstats
path: root/arch/mips/ath79/pci.c
blob: d90e07136383d49b4523719282916187de0652cf (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
/*
 *  Atheros AR71XX/AR724X specific PCI setup code
 *
 *  Copyright (C) 2011 René Bolldorf <xsecute@googlemail.com>
 *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
 *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
 *
 *  Parts of this file are based on Atheros' 2.6.15 BSP
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License version 2 as published
 *  by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/resource.h>
#include <linux/platform_device.h>
#include <asm/mach-ath79/ar71xx_regs.h>
#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/irq.h>
#include "pci.h"

static int (*ath79_pci_plat_dev_init)(struct pci_dev *dev);
static const struct ath79_pci_irq *ath79_pci_irq_map __initdata;
static unsigned ath79_pci_nr_irqs __initdata;

static const struct ath79_pci_irq ar71xx_pci_irq_map[] __initconst = {
	{
		.slot	= 17,
		.pin	= 1,
		.irq	= ATH79_PCI_IRQ(0),
	}, {
		.slot	= 18,
		.pin	= 1,
		.irq	= ATH79_PCI_IRQ(1),
	}, {
		.slot	= 19,
		.pin	= 1,
		.irq	= ATH79_PCI_IRQ(2),
	}
};

static const struct ath79_pci_irq ar724x_pci_irq_map[] __initconst = {
	{
		.slot	= 0,
		.pin	= 1,
		.irq	= ATH79_PCI_IRQ(0),
	}
};

int __init pcibios_map_irq(const struct pci_dev *dev, uint8_t slot, uint8_t pin)
{
	int irq = -1;
	int i;

	if (ath79_pci_nr_irqs == 0 ||
	    ath79_pci_irq_map == NULL) {
		if (soc_is_ar71xx()) {
			ath79_pci_irq_map = ar71xx_pci_irq_map;
			ath79_pci_nr_irqs = ARRAY_SIZE(ar71xx_pci_irq_map);
		} else if (soc_is_ar724x() ||
			   soc_is_ar9342() ||
			   soc_is_ar9344()) {
			ath79_pci_irq_map = ar724x_pci_irq_map;
			ath79_pci_nr_irqs = ARRAY_SIZE(ar724x_pci_irq_map);
		} else {
			pr_crit("pci %s: invalid irq map\n",
				pci_name((struct pci_dev *) dev));
			return irq;
		}
	}

	for (i = 0; i < ath79_pci_nr_irqs; i++) {
		const struct ath79_pci_irq *entry;

		entry = &ath79_pci_irq_map[i];
		if (entry->bus == dev->bus->number &&
		    entry->slot == slot &&
		    entry->pin == pin) {
			irq = entry->irq;
			break;
		}
	}

	if (irq < 0)
		pr_crit("pci %s: no irq found for pin %u\n",
			pci_name((struct pci_dev *) dev), pin);
	else
		pr_info("pci %s: using irq %d for pin %u\n",
			pci_name((struct pci_dev *) dev), irq, pin);

	return irq;
}

int pcibios_plat_dev_init(struct pci_dev *dev)
{
	if (ath79_pci_plat_dev_init)
		return ath79_pci_plat_dev_init(dev);

	return 0;
}

void __init ath79_pci_set_irq_map(unsigned nr_irqs,
				  const struct ath79_pci_irq *map)
{
	ath79_pci_nr_irqs = nr_irqs;
	ath79_pci_irq_map = map;
}

void __init ath79_pci_set_plat_dev_init(int (*func)(struct pci_dev *dev))
{
	ath79_pci_plat_dev_init = func;
}

static struct platform_device *
ath79_register_pci_ar71xx(void)
{
	struct platform_device *pdev;
	struct resource res[2];

	memset(res, 0, sizeof(res));

	res[0].name = "cfg_base";
	res[0].flags = IORESOURCE_MEM;
	res[0].start = AR71XX_PCI_CFG_BASE;
	res[0].end = AR71XX_PCI_CFG_BASE + AR71XX_PCI_CFG_SIZE - 1;

	res[1].flags = IORESOURCE_IRQ;
	res[1].start = ATH79_CPU_IRQ_IP2;
	res[1].end = ATH79_CPU_IRQ_IP2;

	pdev = platform_device_register_simple("ar71xx-pci", -1,
					       res, ARRAY_SIZE(res));
	return pdev;
}

static struct platform_device *
ath79_register_pci_ar724x(int id,
			  unsigned long cfg_base,
			  unsigned long ctrl_base,
			  int irq)
{
	struct platform_device *pdev;
	struct resource res[3];

	memset(res, 0, sizeof(res));

	res[0].name = "cfg_base";
	res[0].flags = IORESOURCE_MEM;
	res[0].start = cfg_base;
	res[0].end = cfg_base + AR724X_PCI_CFG_SIZE - 1;

	res[1].name = "ctrl_base";
	res[1].flags = IORESOURCE_MEM;
	res[1].start = ctrl_base;
	res[1].end = ctrl_base + AR724X_PCI_CTRL_SIZE - 1;

	res[2].flags = IORESOURCE_IRQ;
	res[2].start = irq;
	res[2].end = irq;

	pdev = platform_device_register_simple("ar724x-pci", id,
					       res, ARRAY_SIZE(res));
	return pdev;
}

int __init ath79_register_pci(void)
{
	struct platform_device *pdev = NULL;

	if (soc_is_ar71xx()) {
		pdev = ath79_register_pci_ar71xx();
	} else if (soc_is_ar724x()) {
		pdev = ath79_register_pci_ar724x(-1,
						 AR724X_PCI_CFG_BASE,
						 AR724X_PCI_CTRL_BASE,
						 ATH79_CPU_IRQ_IP2);
	} else if (soc_is_ar9342() ||
		   soc_is_ar9344()) {
		u32 bootstrap;

		bootstrap = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
		if ((bootstrap & AR934X_BOOTSTRAP_PCIE_RC) == 0)
			return -ENODEV;

		pdev = ath79_register_pci_ar724x(-1,
						 AR724X_PCI_CFG_BASE,
						 AR724X_PCI_CTRL_BASE,
						 ATH79_IP2_IRQ(0));
	} else {
		/* No PCI support */
		return -ENODEV;
	}

	if (!pdev)
		pr_err("unable to register PCI controller device\n");

	return pdev ? 0 : -ENODEV;
}
OpenPOWER on IntegriCloud