1 files changed, 140 insertions, 0 deletions
diff --git a/src/devices/pcix_device.c b/src/devices/pcix_device.c
new file mode 100644
index 0000000000..8915e56a1b
--- /dev/null
+++ b/src/devices/pcix_device.c
@@ -0,0 +1,140 @@
+/* (c) 2005 Linux Networx GPL see COPYING for details */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pcix.h>
+
+
+static void pcix_tune_dev(device_t dev)
+{
+	unsigned cap;
+	unsigned status, orig_cmd, cmd;
+	unsigned max_read, max_tran;
+
+	if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) {
+		return;
+	}
+	cap = pci_find_capability(dev, PCI_CAP_ID_PCIX);
+	if (!cap) {
+		return;
+	}
+	printk_debug("%s PCI-X tuning\n", dev_path(dev));
+	status = pci_read_config32(dev, cap + PCI_X_STATUS);
+	orig_cmd = cmd = pci_read_config16(dev,cap + PCI_X_CMD);
+
+	max_read = (status & PCI_X_STATUS_MAX_READ) >> 21;
+	max_tran = (status & PCI_X_STATUS_MAX_SPLIT) >> 23;
+	if (max_read != ((cmd & PCI_X_CMD_MAX_READ) >> 2)) {
+		cmd &= ~PCI_X_CMD_MAX_READ;
+		cmd |= max_read << 2;
+	}
+	if (max_tran != ((cmd & PCI_X_CMD_MAX_SPLIT) >> 4)) {
+		cmd &= ~PCI_X_CMD_MAX_SPLIT;
+		cmd |= max_tran << 4;
+	}
+	/* Don't attempt to handle PCI-X errors */
+	cmd &= ~PCI_X_CMD_DPERR_E;
+	/* Enable Relaxed Ordering */
+	cmd |= PCI_X_CMD_ERO;
+	if (orig_cmd != cmd) {
+		pci_write_config16(dev, cap + PCI_X_CMD, cmd);
+	}
+}
+
+unsigned int pcix_scan_bus(struct bus *bus,
+	unsigned min_devfn, unsigned max_devfn, unsigned int max)
+{
+	device_t child;
+	max = pci_scan_bus(bus, min_devfn, max_devfn, max);
+	for(child = bus->children; child; child = child->sibling) {
+		if (	(child->path.u.pci.devfn < min_devfn) ||
+			(child->path.u.pci.devfn > max_devfn))
+		{
+			continue;
+		}
+		pcix_tune_dev(child);
+	}
+	return max;
+}
+
+const char *pcix_speed(unsigned sstatus)
+{
+	static const char conventional[] = "Conventional PCI";
+	static const char pcix_66mhz[] = "66MHz PCI-X";
+	static const char pcix_100mhz[] = "100MHz PCI-X";
+	static const char pcix_133mhz[] = "133MHz PCI-X";
+	static const char pcix_266mhz[] = "266MHz PCI-X";
+	static const char pcix_533mhz[] = "533MHZ PCI-X";
+	static const char unknown[] = "Unknown";
+		
+	const char *result;
+	result = unknown;
+	switch(PCI_X_SSTATUS_MFREQ(sstatus)) {
+	case PCI_X_SSTATUS_CONVENTIONAL_PCI:	
+		result = conventional; 
+		break;
+	case PCI_X_SSTATUS_MODE1_66MHZ:
+		result = pcix_66mhz;
+		break;
+	case PCI_X_SSTATUS_MODE1_100MHZ:
+		result = pcix_100mhz;
+		break;
+		
+	case PCI_X_SSTATUS_MODE1_133MHZ:
+		result = pcix_133mhz;
+		break;
+		
+	case PCI_X_SSTATUS_MODE2_266MHZ_REF_66MHZ:
+	case PCI_X_SSTATUS_MODE2_266MHZ_REF_100MHZ:
+	case PCI_X_SSTATUS_MODE2_266MHZ_REF_133MHZ:
+		result = pcix_266mhz;
+		break;
+		
+	case PCI_X_SSTATUS_MODE2_533MHZ_REF_66MHZ:
+	case PCI_X_SSTATUS_MODE2_533MHZ_REF_100MHZ:
+	case PCI_X_SSTATUS_MODE2_533MHZ_REF_133MHZ:
+		result = pcix_533mhz;
+		break;
+	}
+	return result;
+}
+
+unsigned int pcix_scan_bridge(device_t dev, unsigned int max)
+{
+	unsigned pos;
+	unsigned sstatus;
+
+	/* Find the PCI-X capability */
+	pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
+	sstatus = pci_read_config16(dev, pos + PCI_X_SEC_STATUS);
+
+	if (PCI_X_SSTATUS_MFREQ(sstatus) == PCI_X_SSTATUS_CONVENTIONAL_PCI) {
+		max = do_pci_scan_bridge(dev, max, pci_scan_bus);
+	} else {
+		max = do_pci_scan_bridge(dev, max, pcix_scan_bus);
+	}
+
+	/* Print the PCI-X bus speed */
+	printk_debug("PCI: %02x: %s\n", dev->link[0].secondary, pcix_speed(sstatus));
+
+	return max;
+}
+
+
+/** Default device operations for PCI-X bridges */
+static struct pci_operations pcix_bus_ops_pci = {
+	.set_subsystem = 0,
+};
+
+struct device_operations default_pcix_ops_bus = {
+	.read_resources   = pci_bus_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_bus_enable_resources,
+	.init		  = 0,
+	.scan_bus	  = pcix_scan_bridge,
+	.enable           = 0,
+	.reset_bus        = pci_bus_reset,
+	.ops_pci          = &pcix_bus_ops_pci,
+};