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authorJon Loeliger <jdl@freescale.com>2007-03-07 14:48:45 -0600
committerKumar Gala <galak@kernel.crashing.org>2007-03-26 17:03:25 -0500
commit3e4e97f42e134e1fe46bdf36bd5d874f5b4f8755 (patch)
tree21b019e1c7258a408bec7059ddfee939f2b8e7f1 /arch/powerpc/sysdev
parente0e3c8d432ab9503b167e53d60b145f0e26bb1e2 (diff)
[POWERPC] 86xx/85xx: Move 8641 PCI-Express to arch/powerpc/sysdev/fsl_pcie.c.
This move sets the stage for the use of generic PCI Express code in 85xx and 86xx parts from FSL. Subsequent patches for 8548 and 8544 will be able to use this shared code. Signed-off-by: Jon Loeliger <jdl@freescale.com> Acked-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r--arch/powerpc/sysdev/Makefile1
-rw-r--r--arch/powerpc/sysdev/fsl_pcie.c171
2 files changed, 172 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index e57379d22b61..83fbbfc779a1 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_PPC_PMI) += pmi.o
obj-$(CONFIG_U3_DART) += dart_iommu.o
obj-$(CONFIG_MMIO_NVRAM) += mmio_nvram.o
obj-$(CONFIG_FSL_SOC) += fsl_soc.o
+obj-$(CONFIG_FSL_PCIE) += fsl_pcie.o
obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o
obj-$(CONFIG_QUICC_ENGINE) += qe_lib/
diff --git a/arch/powerpc/sysdev/fsl_pcie.c b/arch/powerpc/sysdev/fsl_pcie.c
new file mode 100644
index 000000000000..041c07e8b665
--- /dev/null
+++ b/arch/powerpc/sysdev/fsl_pcie.c
@@ -0,0 +1,171 @@
+/*
+ * Support for indirect PCI bridges.
+ *
+ * Copyright (C) 1998 Gabriel Paubert.
+ *
+ * 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.
+ *
+ * "Temporary" MPC8548 Errata file -
+ * The standard indirect_pci code should work with future silicon versions.
+ */
+
+#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/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+
+#define PCI_CFG_OUT out_be32
+
+/* ERRATA PCI-Ex 14 PCIE Controller timeout */
+#define PCIE_FIX out_be32(hose->cfg_addr+0x4, 0x0400ffff)
+
+
+static int
+indirect_read_config_pcie(struct pci_bus *bus, unsigned int devfn, int offset,
+ int len, u32 *val)
+{
+ struct pci_controller *hose = bus->sysdata;
+ volatile void __iomem *cfg_data;
+ u32 temp;
+
+ if (ppc_md.pci_exclude_device)
+ if (ppc_md.pci_exclude_device(bus->number, devfn))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /* Possible artifact of CDCpp50937 needs further investigation */
+ if (devfn != 0x0 && bus->number == 0xff)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ PCIE_FIX;
+ if (bus->number == 0xff) {
+ PCI_CFG_OUT(hose->cfg_addr,
+ (0x80000000 | ((offset & 0xf00) << 16) |
+ ((bus->number - hose->bus_offset) << 16)
+ | (devfn << 8) | ((offset & 0xfc) )));
+ } else {
+ PCI_CFG_OUT(hose->cfg_addr,
+ (0x80000001 | ((offset & 0xf00) << 16) |
+ ((bus->number - hose->bus_offset) << 16)
+ | (devfn << 8) | ((offset & 0xfc) )));
+ }
+
+ /*
+ * Note: the caller has already checked that offset is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ /* ERRATA PCI-Ex 12 - Configuration Address/Data Alignment */
+ cfg_data = hose->cfg_data;
+ PCIE_FIX;
+ temp = in_le32(cfg_data);
+ switch (len) {
+ case 1:
+ *val = (temp >> (((offset & 3))*8)) & 0xff;
+ break;
+ case 2:
+ *val = (temp >> (((offset & 3))*8)) & 0xffff;
+ break;
+ default:
+ *val = temp;
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+indirect_write_config_pcie(struct pci_bus *bus, unsigned int devfn, int offset,
+ int len, u32 val)
+{
+ struct pci_controller *hose = bus->sysdata;
+ volatile void __iomem *cfg_data;
+ u32 temp;
+
+ if (ppc_md.pci_exclude_device)
+ if (ppc_md.pci_exclude_device(bus->number, devfn))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /* Possible artifact of CDCpp50937 needs further investigation */
+ if (devfn != 0x0 && bus->number == 0xff)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ PCIE_FIX;
+ if (bus->number == 0xff) {
+ PCI_CFG_OUT(hose->cfg_addr,
+ (0x80000000 | ((offset & 0xf00) << 16) |
+ ((bus->number - hose->bus_offset) << 16)
+ | (devfn << 8) | ((offset & 0xfc) )));
+ } else {
+ PCI_CFG_OUT(hose->cfg_addr,
+ (0x80000001 | ((offset & 0xf00) << 16) |
+ ((bus->number - hose->bus_offset) << 16)
+ | (devfn << 8) | ((offset & 0xfc) )));
+ }
+
+ /*
+ * Note: the caller has already checked that offset is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ /* ERRATA PCI-Ex 12 - Configuration Address/Data Alignment */
+ cfg_data = hose->cfg_data;
+ switch (len) {
+ case 1:
+ PCIE_FIX;
+ temp = in_le32(cfg_data);
+ temp = (temp & ~(0xff << ((offset & 3) * 8))) |
+ (val << ((offset & 3) * 8));
+ PCIE_FIX;
+ out_le32(cfg_data, temp);
+ break;
+ case 2:
+ PCIE_FIX;
+ temp = in_le32(cfg_data);
+ temp = (temp & ~(0xffff << ((offset & 3) * 8)));
+ temp |= (val << ((offset & 3) * 8)) ;
+ PCIE_FIX;
+ out_le32(cfg_data, temp);
+ break;
+ default:
+ PCIE_FIX;
+ out_le32(cfg_data, val);
+ break;
+ }
+ PCIE_FIX;
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops indirect_pcie_ops = {
+ indirect_read_config_pcie,
+ indirect_write_config_pcie
+};
+
+void __init
+setup_indirect_pcie_nomap(struct pci_controller* hose, void __iomem * cfg_addr,
+ void __iomem * cfg_data)
+{
+ hose->cfg_addr = cfg_addr;
+ hose->cfg_data = cfg_data;
+ hose->ops = &indirect_pcie_ops;
+}
+
+void __init
+setup_indirect_pcie(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
+{
+ unsigned long base = cfg_addr & PAGE_MASK;
+ void __iomem *mbase, *addr, *data;
+
+ mbase = ioremap(base, PAGE_SIZE);
+ addr = mbase + (cfg_addr & ~PAGE_MASK);
+ if ((cfg_data & PAGE_MASK) != base)
+ mbase = ioremap(cfg_data & PAGE_MASK, PAGE_SIZE);
+ data = mbase + (cfg_data & ~PAGE_MASK);
+ setup_indirect_pcie_nomap(hose, addr, data);
+}