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Diffstat (limited to 'arch/powerpc/platforms/powermac/pci.c')
-rw-r--r--arch/powerpc/platforms/powermac/pci.c210
1 files changed, 179 insertions, 31 deletions
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index 5aab261075d..f671ed25390 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -1,7 +1,7 @@
/*
* Support for PCI bridges found on Power Macintoshes.
*
- * Copyright (C) 2003 Benjamin Herrenschmuidt (benh@kernel.crashing.org)
+ * Copyright (C) 2003-2005 Benjamin Herrenschmuidt (benh@kernel.crashing.org)
* Copyright (C) 1997 Paul Mackerras (paulus@samba.org)
*
* This program is free software; you can redistribute it and/or
@@ -25,7 +25,7 @@
#include <asm/pmac_feature.h>
#include <asm/grackle.h>
#ifdef CONFIG_PPC64
-#include <asm/iommu.h>
+//#include <asm/iommu.h>
#include <asm/ppc-pci.h>
#endif
@@ -44,6 +44,7 @@ static int add_bridge(struct device_node *dev);
static int has_uninorth;
#ifdef CONFIG_PPC64
static struct pci_controller *u3_agp;
+static struct pci_controller *u4_pcie;
static struct pci_controller *u3_ht;
#endif /* CONFIG_PPC64 */
@@ -97,11 +98,8 @@ static void __init fixup_bus_range(struct device_node *bridge)
/* 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);
+ if (bus_range == NULL || len < 2 * sizeof(int))
return;
- }
bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
}
@@ -128,14 +126,14 @@ static void __init fixup_bus_range(struct device_node *bridge)
*/
#define MACRISC_CFA0(devfn, off) \
- ((1 << (unsigned long)PCI_SLOT(dev_fn)) \
- | (((unsigned long)PCI_FUNC(dev_fn)) << 8) \
- | (((unsigned long)(off)) & 0xFCUL))
+ ((1 << (unsigned int)PCI_SLOT(dev_fn)) \
+ | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
+ | (((unsigned int)(off)) & 0xFCUL))
#define MACRISC_CFA1(bus, devfn, off) \
- ((((unsigned long)(bus)) << 16) \
- |(((unsigned long)(devfn)) << 8) \
- |(((unsigned long)(off)) & 0xFCUL) \
+ ((((unsigned int)(bus)) << 16) \
+ |(((unsigned int)(devfn)) << 8) \
+ |(((unsigned int)(off)) & 0xFCUL) \
|1UL)
static unsigned long macrisc_cfg_access(struct pci_controller* hose,
@@ -168,7 +166,8 @@ static int macrisc_read_config(struct pci_bus *bus, unsigned int devfn,
hose = pci_bus_to_host(bus);
if (hose == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
-
+ if (offset >= 0x100)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
@@ -199,7 +198,8 @@ static int macrisc_write_config(struct pci_bus *bus, unsigned int devfn,
hose = pci_bus_to_host(bus);
if (hose == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
-
+ if (offset >= 0x100)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
addr = macrisc_cfg_access(hose, bus->number, devfn, offset);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
@@ -234,12 +234,13 @@ static struct pci_ops macrisc_pci_ops =
/*
* Verify that a specific (bus, dev_fn) exists on chaos
*/
-static int
-chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
+static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
{
struct device_node *np;
u32 *vendor, *device;
+ if (offset >= 0x100)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
np = pci_busdev_to_OF_node(bus, devfn);
if (np == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
@@ -341,10 +342,10 @@ static int u3_ht_skip_device(struct pci_controller *hose,
}
#define U3_HT_CFA0(devfn, off) \
- ((((unsigned long)devfn) << 8) | offset)
+ ((((unsigned int)devfn) << 8) | offset)
#define U3_HT_CFA1(bus, devfn, off) \
(U3_HT_CFA0(devfn, off) \
- + (((unsigned long)bus) << 16) \
+ + (((unsigned int)bus) << 16) \
+ 0x01000000UL)
static unsigned long u3_ht_cfg_access(struct pci_controller* hose,
@@ -370,7 +371,8 @@ static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
hose = pci_bus_to_host(bus);
if (hose == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
-
+ if (offset >= 0x100)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
@@ -419,7 +421,8 @@ static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
hose = pci_bus_to_host(bus);
if (hose == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
-
+ if (offset >= 0x100)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
if (!addr)
return PCIBIOS_DEVICE_NOT_FOUND;
@@ -459,6 +462,112 @@ static struct pci_ops u3_ht_pci_ops =
u3_ht_read_config,
u3_ht_write_config
};
+
+#define U4_PCIE_CFA0(devfn, off) \
+ ((1 << ((unsigned int)PCI_SLOT(dev_fn))) \
+ | (((unsigned int)PCI_FUNC(dev_fn)) << 8) \
+ | ((((unsigned int)(off)) >> 8) << 28) \
+ | (((unsigned int)(off)) & 0xfcU))
+
+#define U4_PCIE_CFA1(bus, devfn, off) \
+ ((((unsigned int)(bus)) << 16) \
+ |(((unsigned int)(devfn)) << 8) \
+ | ((((unsigned int)(off)) >> 8) << 28) \
+ |(((unsigned int)(off)) & 0xfcU) \
+ |1UL)
+
+static unsigned long u4_pcie_cfg_access(struct pci_controller* hose,
+ u8 bus, u8 dev_fn, int offset)
+{
+ unsigned int caddr;
+
+ if (bus == hose->first_busno) {
+ caddr = U4_PCIE_CFA0(dev_fn, offset);
+ } else
+ caddr = U4_PCIE_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 &= 0x03;
+ return ((unsigned long)hose->cfg_data) + offset;
+}
+
+static int u4_pcie_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;
+ if (offset >= 0x1000)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ addr = u4_pcie_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 u4_pcie_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;
+ if (offset >= 0x1000)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ addr = u4_pcie_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 u4_pcie_pci_ops =
+{
+ u4_pcie_read_config,
+ u4_pcie_write_config
+};
+
#endif /* CONFIG_PPC64 */
#ifdef CONFIG_PPC32
@@ -628,15 +737,36 @@ static void __init setup_u3_agp(struct pci_controller* hose)
hose->ops = &macrisc_pci_ops;
hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
-
u3_agp = hose;
}
+static void __init setup_u4_pcie(struct pci_controller* hose)
+{
+ /* We currently only implement the "non-atomic" config space, to
+ * be optimised later.
+ */
+ hose->ops = &u4_pcie_pci_ops;
+ hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
+ hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);
+
+ /* The bus contains a bridge from root -> device, we need to
+ * make it visible on bus 0 so that we pick the right type
+ * of config cycles. If we didn't, we would have to force all
+ * config cycles to be type 1. So we override the "bus-range"
+ * property here
+ */
+ hose->first_busno = 0x00;
+ hose->last_busno = 0xff;
+ u4_pcie = hose;
+}
+
static void __init setup_u3_ht(struct pci_controller* hose)
{
struct device_node *np = (struct device_node *)hose->arch_data;
+ struct pci_controller *other = NULL;
int i, cur;
+
hose->ops = &u3_ht_pci_ops;
/* We hard code the address because of the different size of
@@ -670,11 +800,20 @@ static void __init setup_u3_ht(struct pci_controller* hose)
u3_ht = hose;
- if (u3_agp == NULL) {
- DBG("U3 has no AGP, using full resource range\n");
+ if (u3_agp != NULL)
+ other = u3_agp;
+ else if (u4_pcie != NULL)
+ other = u4_pcie;
+
+ if (other == NULL) {
+ DBG("U3/4 has no AGP/PCIE, using full resource range\n");
return;
}
+ /* Fixup bus range vs. PCIE */
+ if (u4_pcie)
+ hose->last_busno = u4_pcie->first_busno - 1;
+
/* We "remove" the AGP resources from the resources allocated to HT,
* that is we create "holes". However, that code does assumptions
* that so far happen to be true (cross fingers...), typically that
@@ -682,7 +821,7 @@ static void __init setup_u3_ht(struct pci_controller* hose)
*/
cur = 0;
for (i=0; i<3; i++) {
- struct resource *res = &u3_agp->mem_resources[i];
+ struct resource *res = &other->mem_resources[i];
if (res->flags != IORESOURCE_MEM)
continue;
/* We don't care about "fine" resources */
@@ -777,9 +916,13 @@ static int __init add_bridge(struct device_node *dev)
setup_u3_ht(hose);
disp_name = "U3-HT";
primary = 1;
+ } else if (device_is_compatible(dev, "u4-pcie")) {
+ setup_u4_pcie(hose);
+ disp_name = "U4-PCIE";
+ primary = 0;
}
- printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
- disp_name, hose->first_busno, hose->last_busno);
+ printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number:"
+ " %d->%d\n", disp_name, hose->first_busno, hose->last_busno);
#endif /* CONFIG_PPC64 */
/* 32 bits only bridges */
@@ -900,6 +1043,8 @@ void __init pmac_pci_init(void)
pci_setup_phb_io(u3_ht, 1);
if (u3_agp)
pci_setup_phb_io(u3_agp, 0);
+ if (u4_pcie)
+ pci_setup_phb_io(u4_pcie, 0);
/*
* On ppc64, fixup the IO resources on our host bridges as
@@ -912,7 +1057,8 @@ void __init pmac_pci_init(void)
/* 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.
+ * safe assumptions for now. We should do something better in the
+ * future though
*/
if (u3_agp) {
struct device_node *np = u3_agp->arch_data;
@@ -920,7 +1066,6 @@ void __init pmac_pci_init(void)
for (np = np->child; np; np = np->sibling)
PCI_DN(np)->busno = 0xf0;
}
-
/* pmac_check_ht_link(); */
/* Tell pci.c to not use the common resource allocation mechanism */
@@ -1127,7 +1272,8 @@ void pmac_pci_fixup_pciata(struct pci_dev* dev)
good:
pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
if ((progif & 5) != 5) {
- printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n", pci_name(dev));
+ printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
+ pci_name(dev));
(void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
(progif & 5) != 5)
@@ -1153,7 +1299,8 @@ static void fixup_k2_sata(struct pci_dev* dev)
for (i = 0; i < 6; i++) {
dev->resource[i].start = dev->resource[i].end = 0;
dev->resource[i].flags = 0;
- pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
+ 0);
}
} else {
pci_read_config_word(dev, PCI_COMMAND, &cmd);
@@ -1162,7 +1309,8 @@ static void fixup_k2_sata(struct pci_dev* dev)
for (i = 0; i < 5; i++) {
dev->resource[i].start = dev->resource[i].end = 0;
dev->resource[i].flags = 0;
- pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, 0);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i,
+ 0);
}
}
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-02 11:27:04 +0000