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gerrit.cesnet.cz / github / trini / u-boot / 4e0499ebb0ac53aca45735ed63a3230df3280fb8 / . / board / eNET / eNET_pci.c
blob: a03090e54061ad15748cb4a0072fbbad5b5a933f [file] [log] [blame]
Graeme Russ5b34a292009-08-23 12:59:58 +1000[diff] [blame]1/*
Graeme Russdbf71152011-04-13 19:43:26 +1000[diff] [blame]2 * (C) Copyright 2008,2009
3 * Graeme Russ, <graeme.russ@gmail.com>
Graeme Russ5b34a292009-08-23 12:59:58 +1000[diff] [blame]4 *
5 * (C) Copyright 2002
Graeme Russdbf71152011-04-13 19:43:26 +1000[diff] [blame]6 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
Graeme Russ5b34a292009-08-23 12:59:58 +1000[diff] [blame]7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
Graeme Russdbf71152011-04-13 19:43:26 +1000[diff] [blame]26
Graeme Russ5b34a292009-08-23 12:59:58 +1000[diff] [blame]27#include <common.h>
28#include <pci.h>
29#include <asm/pci.h>
30#include <asm/ic/pci.h>
31
32static void pci_enet_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
33{
34 /* a configurable lists of IRQs to steal when we need one */
35 static int irq_list[] = {
36 CONFIG_SYS_FIRST_PCI_IRQ,
37 CONFIG_SYS_SECOND_PCI_IRQ,
38 CONFIG_SYS_THIRD_PCI_IRQ,
39 CONFIG_SYS_FORTH_PCI_IRQ
40 };
41 static int next_irq_index=0;
42
43 uchar tmp_pin;
44 int pin;
45
46 pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
47 pin = tmp_pin;
48
49 pin -= 1; /* PCI config space use 1-based numbering */
50 if (pin == -1) {
51 return; /* device use no irq */
52 }
53
54 /* map device number + pin to a pin on the sc520 */
55 switch (PCI_DEV(dev)) {
56 case 12: /* First Ethernet Chip */
57 pin += SC520_PCI_INTA;
58 break;
59
60 case 13: /* Second Ethernet Chip */
61 pin += SC520_PCI_INTB;
62 break;
63
64 default:
65 return;
66 }
67
68 pin &= 3; /* wrap around */
69
70 if (sc520_pci_ints[pin] == -1) {
71 /* re-route one interrupt for us */
72 if (next_irq_index > 3) {
73 return;
74 }
75 if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
76 return;
77 }
78 next_irq_index++;
79 }
80
81 if (-1 != sc520_pci_ints[pin]) {
82 pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
83 sc520_pci_ints[pin]);
84 }
85 printf("fixup_irq: device %d pin %c irq %d\n",
86 PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
87}
88
89static struct pci_controller enet_hose = {
90 fixup_irq: pci_enet_fixup_irq,
91};
92
93void pci_init_board(void)
94{
95 pci_sc520_init(&enet_hose);
96}
Graeme Russ21e67e72010-04-24 00:05:54 +1000[diff] [blame]97
98int pci_set_regions(struct pci_controller *hose)
99{
100 /* System memory space */
101 pci_set_region(hose->regions + 0,
102 SC520_PCI_MEMORY_BUS,
103 SC520_PCI_MEMORY_PHYS,
104 SC520_PCI_MEMORY_SIZE,
105 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
106
107 /* ISA/PCI memory space */
108 pci_set_region(hose->regions + 1,
109 SC520_ISA_MEM_BUS,
110 SC520_ISA_MEM_PHYS,
111 SC520_ISA_MEM_SIZE,
112 PCI_REGION_MEM);
113
114 /* PCI I/O space */
115 pci_set_region(hose->regions + 2,
116 SC520_PCI_IO_BUS,
117 SC520_PCI_IO_PHYS,
118 SC520_PCI_IO_SIZE,
119 PCI_REGION_IO);
120
121 /* ISA/PCI I/O space */
122 pci_set_region(hose->regions + 3,
123 SC520_ISA_IO_BUS,
124 SC520_ISA_IO_PHYS,
125 SC520_ISA_IO_SIZE,
126 PCI_REGION_IO);
127
128 return 4;
129}