diff options
Diffstat (limited to 'board/eNET/eNET_pci.c')
| -rw-r--r-- | board/eNET/eNET_pci.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/board/eNET/eNET_pci.c b/board/eNET/eNET_pci.c new file mode 100644 index 0000000..e80a8fe --- /dev/null +++ b/board/eNET/eNET_pci.c @@ -0,0 +1,95 @@ +/* + * (C) Copyright 2008 + * Graeme Russ, graeme.russ@gmail.com. + * + * (C) Copyright 2002 + * Daniel Engström, Omicron Ceti AB <daniel@omicron.se>. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> +#include <pci.h> +#include <asm/pci.h> +#include <asm/ic/pci.h> + +static void pci_enet_fixup_irq(struct pci_controller *hose, pci_dev_t dev) +{ + /* a configurable lists of IRQs to steal when we need one */ + static int irq_list[] = { + CONFIG_SYS_FIRST_PCI_IRQ, + CONFIG_SYS_SECOND_PCI_IRQ, + CONFIG_SYS_THIRD_PCI_IRQ, + CONFIG_SYS_FORTH_PCI_IRQ + }; + static int next_irq_index=0; + + uchar tmp_pin; + int pin; + + pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin); + pin = tmp_pin; + + pin -= 1; /* PCI config space use 1-based numbering */ + if (pin == -1) { + return; /* device use no irq */ + } + + /* map device number + pin to a pin on the sc520 */ + switch (PCI_DEV(dev)) { + case 12: /* First Ethernet Chip */ + pin += SC520_PCI_INTA; + break; + + case 13: /* Second Ethernet Chip */ + pin += SC520_PCI_INTB; + break; + + default: + return; + } + + pin &= 3; /* wrap around */ + + if (sc520_pci_ints[pin] == -1) { + /* re-route one interrupt for us */ + if (next_irq_index > 3) { + return; + } + if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) { + return; + } + next_irq_index++; + } + + if (-1 != sc520_pci_ints[pin]) { + pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, + sc520_pci_ints[pin]); + } + printf("fixup_irq: device %d pin %c irq %d\n", + PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]); +} + +static struct pci_controller enet_hose = { + fixup_irq: pci_enet_fixup_irq, +}; + +void pci_init_board(void) +{ + pci_sc520_init(&enet_hose); +} |