Linux Kernel  3.7.1
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pci.c
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1 /*
2  * Atheros AR71XX/AR724X specific PCI setup code
3  *
4  * Copyright (C) 2011 RenĂ© Bolldorf <[email protected]>
5  * Copyright (C) 2008-2011 Gabor Juhos <[email protected]>
6  * Copyright (C) 2008 Imre Kaloz <[email protected]>
7  *
8  * Parts of this file are based on Atheros' 2.6.15 BSP
9  *
10  * This program is free software; you can redistribute it and/or modify it
11  * under the terms of the GNU General Public License version 2 as published
12  * by the Free Software Foundation.
13  */
14 
15 #include <linux/init.h>
16 #include <linux/pci.h>
18 #include <asm/mach-ath79/ath79.h>
19 #include <asm/mach-ath79/irq.h>
20 #include <asm/mach-ath79/pci.h>
21 #include "pci.h"
22 
23 static int (*ath79_pci_plat_dev_init)(struct pci_dev *dev);
24 static const struct ath79_pci_irq *ath79_pci_irq_map __initdata;
25 static unsigned ath79_pci_nr_irqs __initdata;
26 
27 static const struct ath79_pci_irq ar71xx_pci_irq_map[] __initconst = {
28  {
29  .slot = 17,
30  .pin = 1,
31  .irq = ATH79_PCI_IRQ(0),
32  }, {
33  .slot = 18,
34  .pin = 1,
35  .irq = ATH79_PCI_IRQ(1),
36  }, {
37  .slot = 19,
38  .pin = 1,
39  .irq = ATH79_PCI_IRQ(2),
40  }
41 };
42 
43 static const struct ath79_pci_irq ar724x_pci_irq_map[] __initconst = {
44  {
45  .slot = 0,
46  .pin = 1,
47  .irq = ATH79_PCI_IRQ(0),
48  }
49 };
50 
52 {
53  int irq = -1;
54  int i;
55 
56  if (ath79_pci_nr_irqs == 0 ||
57  ath79_pci_irq_map == NULL) {
58  if (soc_is_ar71xx()) {
59  ath79_pci_irq_map = ar71xx_pci_irq_map;
60  ath79_pci_nr_irqs = ARRAY_SIZE(ar71xx_pci_irq_map);
61  } else if (soc_is_ar724x() ||
62  soc_is_ar9342() ||
63  soc_is_ar9344()) {
64  ath79_pci_irq_map = ar724x_pci_irq_map;
65  ath79_pci_nr_irqs = ARRAY_SIZE(ar724x_pci_irq_map);
66  } else {
67  pr_crit("pci %s: invalid irq map\n",
68  pci_name((struct pci_dev *) dev));
69  return irq;
70  }
71  }
72 
73  for (i = 0; i < ath79_pci_nr_irqs; i++) {
74  const struct ath79_pci_irq *entry;
75 
76  entry = &ath79_pci_irq_map[i];
77  if (entry->slot == slot && entry->pin == pin) {
78  irq = entry->irq;
79  break;
80  }
81  }
82 
83  if (irq < 0)
84  pr_crit("pci %s: no irq found for pin %u\n",
85  pci_name((struct pci_dev *) dev), pin);
86  else
87  pr_info("pci %s: using irq %d for pin %u\n",
88  pci_name((struct pci_dev *) dev), irq, pin);
89 
90  return irq;
91 }
92 
94 {
95  if (ath79_pci_plat_dev_init)
96  return ath79_pci_plat_dev_init(dev);
97 
98  return 0;
99 }
100 
102  const struct ath79_pci_irq *map)
103 {
104  ath79_pci_nr_irqs = nr_irqs;
105  ath79_pci_irq_map = map;
106 }
107 
109 {
110  ath79_pci_plat_dev_init = func;
111 }
112 
114 {
115  if (soc_is_ar71xx())
116  return ar71xx_pcibios_init();
117 
118  if (soc_is_ar724x())
120 
121  if (soc_is_ar9342() || soc_is_ar9344()) {
122  u32 bootstrap;
123 
124  bootstrap = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
125  if (bootstrap & AR934X_BOOTSTRAP_PCIE_RC)
127  }
128 
129  return -ENODEV;
130 }