diff options
Diffstat (limited to 'src/mainboard/axus/tc320/irq_tables.c')
| -rw-r--r-- | src/mainboard/axus/tc320/irq_tables.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/mainboard/axus/tc320/irq_tables.c b/src/mainboard/axus/tc320/irq_tables.c new file mode 100644 index 0000000000..32fa002960 --- /dev/null +++ b/src/mainboard/axus/tc320/irq_tables.c @@ -0,0 +1,122 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2007 Juergen Beisert <juergen@kreuzholzen.de> + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Interrupt routing description for the AXUS TC320 board. + * It was not possible to read back the PIRQ table. There was no BIOS to ask + * for it, only a bootloader for an embedded OS. + * But with the method described here: + * http://linuxbios.org/Creating_Valid_IRQ_Tables + * it was possible to detect the physical IRQ routing on this board. + * + * This is the physical routing on this board: + * + * IRQ 5530 USB Network + * controller northbridge device device + * 00.13.0 00.0e.00 + * -------------------------------------------- + * 11 INTA# INTA# n.c. + * 15 INTB# n.c. INTA# + * INTC# n.c. n.c. + * INTD# n.c. n.c. + */ + +#include <arch/pirq_routing.h> + +#define INT_A 0x01 +#define INT_B 0x02 +#define INT_C 0x03 +#define INT_D 0x04 + +/* + * The USB controller should be connected to IRQ11, + * the network controller should be connected to IRQ15. + */ + +#define IRQ_BITMAP_LINK0 0x0800 +#define IRQ_BITMAP_LINK1 0x8000 +#define IRQ_BITMAP_LINK2 0x0000 +#define IRQ_BITMAP_LINK3 0x0000 + +/** Reserved interrupt channels for exclusive PCI usage. */ +#define IRQ_DEVOTED_TO_PCI (IRQ_BITMAP_LINK0 | IRQ_BITMAP_LINK1) + +/** + * Routing description. + * Documentation at: http://www.microsoft.com/whdc/archive/pciirq.mspx + */ +const struct irq_routing_table intel_irq_routing_table = { + .signature = PIRQ_SIGNATURE, /* PIRQ signature */ + .version = PIRQ_VERSION, /* PIRQ version */ + .size = 32 + 16 * IRQ_SLOT_COUNT,/* Max. IRQ_SLOT_COUNT devices */ + .rtr_bus = 0x00, /* Interrupt router bus */ + .rtr_devfn = (0x12 << 3) | 0x0, /* Interrupt router device */ + .exclusive_irqs = IRQ_DEVOTED_TO_PCI, /* IRQs devoted to PCI */ + .rtr_vendor = 0x1078, /* Vendor */ + .rtr_device = 0x0100, /* Device */ + .miniport_data = 0, /* Crap (miniport) */ + .checksum = 0xe3, /* Checksum */ + .slots = { + /* + * Definition for "slot#1". There is no real slot, + * the USB device is embedded... + */ + [0] = { + .bus = 0x00, + .devfn = (0x13 << 3) | 0x0, + .irq = { + /* Link Bitmap */ + [0] = { INT_A, IRQ_BITMAP_LINK0 }, + [1] = { INT_B, IRQ_BITMAP_LINK1 }, + [2] = { INT_C, IRQ_BITMAP_LINK2 }, + [3] = { INT_D, IRQ_BITMAP_LINK3 }, + }, + .slot = 0x0, + }, + /* + * Definition for "slot#2". There is no real slot, + * the network device is soldered... + */ + [1] = { + .bus = 0x00, + .devfn = (0x0e << 3) | 0x0, + .irq = { + /* Link Bitmap */ + [0] = { INT_B, IRQ_BITMAP_LINK1 }, + [1] = { INT_C, IRQ_BITMAP_LINK2 }, + [2] = { INT_D, IRQ_BITMAP_LINK3 }, + [3] = { INT_A, IRQ_BITMAP_LINK0 }, + }, + .slot = 0x0, + } + } +}; + +/** + * Copy the IRQ routing table to memory. + * + * @param[in] addr Destination address (between 0xF0000...0x100000). + * @return TODO. + */ +unsigned long write_pirq_routing_table(unsigned long addr) +{ + return copy_pirq_routing_table(addr); +} |