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Diffstat (limited to 'arch/powerpc/platforms/maple/pci.c')
-rw-r--r--arch/powerpc/platforms/maple/pci.c522
1 files changed, 522 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/maple/pci.c b/arch/powerpc/platforms/maple/pci.c
new file mode 100644
index 000000000000..340c21caeae2
--- /dev/null
+++ b/arch/powerpc/platforms/maple/pci.c
@@ -0,0 +1,522 @@
+/*
+ * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
+ * IBM Corp.
+ *
+ * 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.
+ */
+
+#define DEBUG
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <asm/iommu.h>
+#include <asm/ppc-pci.h>
+
+#include "maple.h"
+
+#ifdef DEBUG
+#define DBG(x...) printk(x)
+#else
+#define DBG(x...)
+#endif
+
+static struct pci_controller *u3_agp, *u3_ht;
+
+static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
+{
+ for (; node != 0;node = node->sibling) {
+ int * bus_range;
+ unsigned int *class_code;
+ int len;
+
+ /* For PCI<->PCI bridges or CardBus bridges, we go down */
+ class_code = (unsigned int *) get_property(node, "class-code", NULL);
+ if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
+ (*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
+ continue;
+ bus_range = (int *) get_property(node, "bus-range", &len);
+ if (bus_range != NULL && len > 2 * sizeof(int)) {
+ if (bus_range[1] > higher)
+ higher = bus_range[1];
+ }
+ higher = fixup_one_level_bus_range(node->child, higher);
+ }
+ return higher;
+}
+
+/* This routine fixes the "bus-range" property of all bridges in the
+ * system since they tend to have their "last" member wrong on macs
+ *
+ * Note that the bus numbers manipulated here are OF bus numbers, they
+ * are not Linux bus numbers.
+ */
+static void __init fixup_bus_range(struct device_node *bridge)
+{
+ int * bus_range;
+ int len;
+
+ /* Lookup the "bus-range" property for the hose */
+ bus_range = (int *) get_property(bridge, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int)) {
+ printk(KERN_WARNING "Can't get bus-range for %s\n",
+ bridge->full_name);
+ return;
+ }
+ bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
+}
+
+
+#define U3_AGP_CFA0(devfn, off) \
+ ((1 << (unsigned long)PCI_SLOT(dev_fn)) \
+ | (((unsigned long)PCI_FUNC(dev_fn)) << 8) \
+ | (((unsigned long)(off)) & 0xFCUL))
+
+#define U3_AGP_CFA1(bus, devfn, off) \
+ ((((unsigned long)(bus)) << 16) \
+ |(((unsigned long)(devfn)) << 8) \
+ |(((unsigned long)(off)) & 0xFCUL) \
+ |1UL)
+
+static unsigned long u3_agp_cfg_access(struct pci_controller* hose,
+ u8 bus, u8 dev_fn, u8 offset)
+{
+ unsigned int caddr;
+
+ if (bus == hose->first_busno) {
+ if (dev_fn < (11 << 3))
+ return 0;
+ caddr = U3_AGP_CFA0(dev_fn, offset);
+ } else
+ caddr = U3_AGP_CFA1(bus, dev_fn, offset);
+
+ /* Uninorth will return garbage if we don't read back the value ! */
+ do {
+ out_le32(hose->cfg_addr, caddr);
+ } while (in_le32(hose->cfg_addr) != caddr);
+
+ offset &= 0x07;
+ return ((unsigned long)hose->cfg_data) + offset;
+}
+
+static int u3_agp_read_config(struct pci_bus *bus, unsigned int devfn,
+ int offset, int len, u32 *val)
+{
+ struct pci_controller *hose;
+ unsigned long addr;
+
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
+ if (!addr)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ /*
+ * Note: the caller has already checked that offset is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ switch (len) {
+ case 1:
+ *val = in_8((u8 *)addr);
+ break;
+ case 2:
+ *val = in_le16((u16 *)addr);
+ break;
+ default:
+ *val = in_le32((u32 *)addr);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int u3_agp_write_config(struct pci_bus *bus, unsigned int devfn,
+ int offset, int len, u32 val)
+{
+ struct pci_controller *hose;
+ unsigned long addr;
+
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
+ if (!addr)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ /*
+ * Note: the caller has already checked that offset is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ switch (len) {
+ case 1:
+ out_8((u8 *)addr, val);
+ (void) in_8((u8 *)addr);
+ break;
+ case 2:
+ out_le16((u16 *)addr, val);
+ (void) in_le16((u16 *)addr);
+ break;
+ default:
+ out_le32((u32 *)addr, val);
+ (void) in_le32((u32 *)addr);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops u3_agp_pci_ops =
+{
+ u3_agp_read_config,
+ u3_agp_write_config
+};
+
+
+#define U3_HT_CFA0(devfn, off) \
+ ((((unsigned long)devfn) << 8) | offset)
+#define U3_HT_CFA1(bus, devfn, off) \
+ (U3_HT_CFA0(devfn, off) \
+ + (((unsigned long)bus) << 16) \
+ + 0x01000000UL)
+
+static unsigned long u3_ht_cfg_access(struct pci_controller* hose,
+ u8 bus, u8 devfn, u8 offset)
+{
+ if (bus == hose->first_busno) {
+ if (PCI_SLOT(devfn) == 0)
+ return 0;
+ return ((unsigned long)hose->cfg_data) + U3_HT_CFA0(devfn, offset);
+ } else
+ return ((unsigned long)hose->cfg_data) + U3_HT_CFA1(bus, devfn, offset);
+}
+
+static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
+ int offset, int len, u32 *val)
+{
+ struct pci_controller *hose;
+ unsigned long addr;
+
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
+ if (!addr)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /*
+ * Note: the caller has already checked that offset is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ switch (len) {
+ case 1:
+ *val = in_8((u8 *)addr);
+ break;
+ case 2:
+ *val = in_le16((u16 *)addr);
+ break;
+ default:
+ *val = in_le32((u32 *)addr);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
+ int offset, int len, u32 val)
+{
+ struct pci_controller *hose;
+ unsigned long addr;
+
+ hose = pci_bus_to_host(bus);
+ if (hose == NULL)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
+ if (!addr)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ /*
+ * Note: the caller has already checked that offset is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ switch (len) {
+ case 1:
+ out_8((u8 *)addr, val);
+ (void) in_8((u8 *)addr);
+ break;
+ case 2:
+ out_le16((u16 *)addr, val);
+ (void) in_le16((u16 *)addr);
+ break;
+ default:
+ out_le32((u32 *)addr, val);
+ (void) in_le32((u32 *)addr);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops u3_ht_pci_ops =
+{
+ u3_ht_read_config,
+ u3_ht_write_config
+};
+
+static void __init setup_u3_agp(struct pci_controller* hose)
+{
+ /* On G5, we move AGP up to high bus number so we don't need
+ * to reassign bus numbers for HT. If we ever have P2P bridges
+ * on AGP, we'll have to move pci_assign_all_buses to the
+ * pci_controller structure so we enable it for AGP and not for
+ * HT childs.
+ * We hard code the address because of the different size of
+ * the reg address cell, we shall fix that by killing struct
+ * reg_property and using some accessor functions instead
+ */
+ hose->first_busno = 0xf0;
+ hose->last_busno = 0xff;
+ hose->ops = &u3_agp_pci_ops;
+ hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
+ hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
+
+ u3_agp = hose;
+}
+
+static void __init setup_u3_ht(struct pci_controller* hose)
+{
+ hose->ops = &u3_ht_pci_ops;
+
+ /* We hard code the address because of the different size of
+ * the reg address cell, we shall fix that by killing struct
+ * reg_property and using some accessor functions instead
+ */
+ hose->cfg_data = (volatile unsigned char *)ioremap(0xf2000000, 0x02000000);
+
+ hose->first_busno = 0;
+ hose->last_busno = 0xef;
+
+ u3_ht = hose;
+}
+
+static int __init add_bridge(struct device_node *dev)
+{
+ int len;
+ struct pci_controller *hose;
+ char* disp_name;
+ int *bus_range;
+ int primary = 1;
+ struct property *of_prop;
+
+ DBG("Adding PCI host bridge %s\n", dev->full_name);
+
+ bus_range = (int *) get_property(dev, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int)) {
+ printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
+ dev->full_name);
+ }
+
+ hose = alloc_bootmem(sizeof(struct pci_controller));
+ if (hose == NULL)
+ return -ENOMEM;
+ pci_setup_pci_controller(hose);
+
+ hose->arch_data = dev;
+ hose->first_busno = bus_range ? bus_range[0] : 0;
+ hose->last_busno = bus_range ? bus_range[1] : 0xff;
+
+ of_prop = alloc_bootmem(sizeof(struct property) +
+ sizeof(hose->global_number));
+ if (of_prop) {
+ memset(of_prop, 0, sizeof(struct property));
+ of_prop->name = "linux,pci-domain";
+ of_prop->length = sizeof(hose->global_number);
+ of_prop->value = (unsigned char *)&of_prop[1];
+ memcpy(of_prop->value, &hose->global_number, sizeof(hose->global_number));
+ prom_add_property(dev, of_prop);
+ }
+
+ disp_name = NULL;
+ if (device_is_compatible(dev, "u3-agp")) {
+ setup_u3_agp(hose);
+ disp_name = "U3-AGP";
+ primary = 0;
+ } else if (device_is_compatible(dev, "u3-ht")) {
+ setup_u3_ht(hose);
+ disp_name = "U3-HT";
+ primary = 1;
+ }
+ printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
+ disp_name, hose->first_busno, hose->last_busno);
+
+ /* Interpret the "ranges" property */
+ /* This also maps the I/O region and sets isa_io/mem_base */
+ pci_process_bridge_OF_ranges(hose, dev, primary);
+ pci_setup_phb_io(hose, primary);
+
+ /* Fixup "bus-range" OF property */
+ fixup_bus_range(dev);
+
+ return 0;
+}
+
+
+void __init maple_pcibios_fixup(void)
+{
+ struct pci_dev *dev = NULL;
+
+ DBG(" -> maple_pcibios_fixup\n");
+
+ for_each_pci_dev(dev)
+ pci_read_irq_line(dev);
+
+ /* Do the mapping of the IO space */
+ phbs_remap_io();
+
+ DBG(" <- maple_pcibios_fixup\n");
+}
+
+static void __init maple_fixup_phb_resources(void)
+{
+ struct pci_controller *hose, *tmp;
+
+ list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+ unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;
+ hose->io_resource.start += offset;
+ hose->io_resource.end += offset;
+ printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
+ hose->global_number,
+ hose->io_resource.start, hose->io_resource.end);
+ }
+}
+
+void __init maple_pci_init(void)
+{
+ struct device_node *np, *root;
+ struct device_node *ht = NULL;
+
+ /* Probe root PCI hosts, that is on U3 the AGP host and the
+ * HyperTransport host. That one is actually "kept" around
+ * and actually added last as it's resource management relies
+ * on the AGP resources to have been setup first
+ */
+ root = of_find_node_by_path("/");
+ if (root == NULL) {
+ printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
+ return;
+ }
+ for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
+ if (np->name == NULL)
+ continue;
+ if (strcmp(np->name, "pci") == 0) {
+ if (add_bridge(np) == 0)
+ of_node_get(np);
+ }
+ if (strcmp(np->name, "ht") == 0) {
+ of_node_get(np);
+ ht = np;
+ }
+ }
+ of_node_put(root);
+
+ /* Now setup the HyperTransport host if we found any
+ */
+ if (ht && add_bridge(ht) != 0)
+ of_node_put(ht);
+
+ /* Fixup the IO resources on our host bridges as the common code
+ * does it only for childs of the host bridges
+ */
+ maple_fixup_phb_resources();
+
+ /* Setup the linkage between OF nodes and PHBs */
+ pci_devs_phb_init();
+
+ /* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
+ * assume there is no P2P bridge on the AGP bus, which should be a
+ * safe assumptions hopefully.
+ */
+ if (u3_agp) {
+ struct device_node *np = u3_agp->arch_data;
+ PCI_DN(np)->busno = 0xf0;
+ for (np = np->child; np; np = np->sibling)
+ PCI_DN(np)->busno = 0xf0;
+ }
+
+ /* Tell pci.c to use the common resource allocation mecanism */
+ pci_probe_only = 0;
+
+ /* Allow all IO */
+ io_page_mask = -1;
+}
+
+int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
+{
+ struct device_node *np;
+ int irq = channel ? 15 : 14;
+
+ if (pdev->vendor != PCI_VENDOR_ID_AMD ||
+ pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
+ return irq;
+
+ np = pci_device_to_OF_node(pdev);
+ if (np == NULL)
+ return irq;
+ if (np->n_intrs < 2)
+ return irq;
+ return np->intrs[channel & 0x1].line;
+}
+
+/* XXX: To remove once all firmwares are ok */
+static void fixup_maple_ide(struct pci_dev* dev)
+{
+#if 0 /* Enable this to enable IDE port 0 */
+ {
+ u8 v;
+
+ pci_read_config_byte(dev, 0x40, &v);
+ v |= 2;
+ pci_write_config_byte(dev, 0x40, v);
+ }
+#endif
+#if 0 /* fix bus master base */
+ pci_write_config_dword(dev, 0x20, 0xcc01);
+ printk("old ide resource: %lx -> %lx \n",
+ dev->resource[4].start, dev->resource[4].end);
+ dev->resource[4].start = 0xcc00;
+ dev->resource[4].end = 0xcc10;
+#endif
+#if 1 /* Enable this to fixup IDE sense/polarity of irqs in IO-APICs */
+ {
+ struct pci_dev *apicdev;
+ u32 v;
+
+ apicdev = pci_get_slot (dev->bus, PCI_DEVFN(5,0));
+ if (apicdev == NULL)
+ printk("IDE Fixup IRQ: Can't find IO-APIC !\n");
+ else {
+ pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*14);
+ pci_read_config_dword(apicdev, 0xf4, &v);
+ v &= ~0x00000022;
+ pci_write_config_dword(apicdev, 0xf4, v);
+ pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*15);
+ pci_read_config_dword(apicdev, 0xf4, &v);
+ v &= ~0x00000022;
+ pci_write_config_dword(apicdev, 0xf4, v);
+ pci_dev_put(apicdev);
+ }
+ }
+#endif
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_IDE,
+ fixup_maple_ide);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-05 18:28:58 +0300