IRQ setup for EPIA
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1174 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/devices/pci_device.c b/src/devices/pci_device.c
index a4789d2..a91381f 100644
--- a/src/devices/pci_device.c
+++ b/src/devices/pci_device.c
@@ -14,6 +14,7 @@
#include <stdint.h>
#include <bitops.h>
#include <string.h>
+#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
@@ -679,3 +680,68 @@
printk_spew("%s returns max %d\n", __FUNCTION__, max);
return max;
}
+/*
+ Tell the EISA int controller this int must be level triggered
+ THIS IS A KLUDGE -- sorry, this needs to get cleaned up.
+*/
+static void pci_level_irq(unsigned char intNum)
+{
+ unsigned intBits = inb(0x4d0) | (((unsigned) inb(0x4d1)) << 8);
+
+ intBits |= (1 << intNum);
+
+ // Write new values
+ outb((unsigned char) intBits, 0x4d0);
+ outb((unsigned char) (intBits >> 8), 0x4d1);
+}
+
+
+/*
+ This function assigns IRQs for all functions contained within
+ the indicated device address. If the device does not exist or does
+ not require interrupts then this function has no effect.
+
+ This function should be called for each PCI slot in your system.
+
+ pIntAtoD is an array of IRQ #s that are assigned to PINTA through PINTD of
+ this slot.
+ The particular irq #s that are passed in depend on the routing inside
+ your southbridge and on your motherboard.
+
+ -kevinh@ispiri.com
+*/
+void pci_assign_irqs(unsigned bus, unsigned slot,
+ const unsigned char pIntAtoD[4])
+{
+ unsigned functNum;
+ device_t pdev;
+ unsigned char line;
+ unsigned char irq;
+ unsigned char readback;
+
+ /* Each slot may contain up to eight functions */
+ for (functNum = 0; functNum < 8; functNum++) {
+ pdev = dev_find_slot(bus, (slot << 3) + functNum);
+
+ if (pdev) {
+ line = pci_read_config8(pdev, PCI_INTERRUPT_PIN);
+
+ // PCI spec says all other values are reserved
+ if ((line >= 1) && (line <= 4)) {
+ irq = pIntAtoD[line - 1];
+
+ printk_debug("Assigning IRQ %d to %d:%x.%d\n", \
+ irq, bus, slot, functNum);
+
+ pci_write_config8(pdev, PCI_INTERRUPT_LINE,\
+ pIntAtoD[line - 1]);
+
+ readback = pci_read_config8(pdev, PCI_INTERRUPT_LINE);
+ printk_debug(" Readback = %d\n", readback);
+
+ // Change to level triggered
+ pci_level_irq(pIntAtoD[line - 1]);
+ }
+ }
+ }
+}
diff --git a/src/southbridge/via/vt8231/vt8231.c b/src/southbridge/via/vt8231/vt8231.c
index 95e2ca5..e849be1 100644
--- a/src/southbridge/via/vt8231/vt8231.c
+++ b/src/southbridge/via/vt8231/vt8231.c
@@ -146,12 +146,64 @@
* in the C code.
*/
static void vt8231_pci_enable(struct southbridge_via_vt8231_config *conf) {
+ /*
unsigned long busdevfn = 0x8000;
if (conf->enable_ide) {
printk_spew("%s: enabling IDE function\n", __FUNCTION__);
}
-
+ */
}
+
+/* PIRQ init
+ */
+void pci_assign_irqs(unsigned bus, unsigned slot, const unsigned char pIntAtoD[4]);
+
+
+static const unsigned char southbridgeIrqs[4] = { 11, 5, 10, 12 };
+static const unsigned char enetIrqs[4] = { 11, 5, 10, 12 };
+static const unsigned char slotIrqs[4] = { 5, 10, 12, 11 };
+
+/*
+ Our IDSEL mappings are as follows
+ PCI slot is AD31 (device 15) (00:14.0)
+ Southbridge is AD28 (device 12) (00:11.0)
+*/
+static void pci_routing_fixup(void)
+{
+ device_t dev;
+
+ dev = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, 0);
+ printk_info("%s: dev is %p\n", __FUNCTION__, dev);
+ if (dev) {
+ /* initialize PCI interupts - these assignments depend
+ on the PCB routing of PINTA-D
+
+ PINTA = IRQ11
+ PINTB = IRQ5
+ PINTC = IRQ10
+ PINTD = IRQ12
+ */
+ pci_write_config8(dev, 0x55, 0xb0);
+ pci_write_config8(dev, 0x56, 0xa5);
+ pci_write_config8(dev, 0x57, 0xc0);
+ }
+
+ // Standard southbridge components
+ printk_info("setting southbridge\n");
+ pci_assign_irqs(0, 0x11, southbridgeIrqs);
+
+ // Ethernet built into southbridge
+ printk_info("setting ethernet\n");
+ pci_assign_irqs(0, 0x12, enetIrqs);
+
+ // PCI slot
+ printk_info("setting pci slot\n");
+ pci_assign_irqs(0, 0x14, slotIrqs);
+ printk_info("%s: DONE\n", __FUNCTION__);
+}
+
+
+
static void vt8231_init(struct southbridge_via_vt8231_config *conf)
{
unsigned char enables;
@@ -377,6 +429,13 @@
case CONF_PASS_POST_PCI:
vt8231_init(conf);
+ printk_err("FUCK! ROUTING FIXUP!\n");
+ pci_routing_fixup();
+
+ break;
+ case CONF_PASS_PRE_BOOT:
+ printk_err("FUCK! ROUTING FIXUP!\n");
+ pci_routing_fixup();
break;
default: