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path: root/drivers/pci/pci_indirect.c
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Diffstat (limited to 'drivers/pci/pci_indirect.c')
-rw-r--r--drivers/pci/pci_indirect.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/pci/pci_indirect.c b/drivers/pci/pci_indirect.c
new file mode 100644
index 0000000..a8220fb
--- /dev/null
+++ b/drivers/pci/pci_indirect.c
@@ -0,0 +1,138 @@
+/*
+ * 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.
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_PCI
+#if (!defined(__I386__) && !defined(CONFIG_IXDP425))
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <pci.h>
+
+#define cfg_read(val, addr, type, op) *val = op((type)(addr))
+#define cfg_write(val, addr, type, op) op((type *)(addr), (val))
+
+#ifdef CONFIG_IXP425
+extern unsigned char in_8 (volatile unsigned *addr);
+extern unsigned short in_le16 (volatile unsigned *addr);
+extern unsigned in_le32 (volatile unsigned *addr);
+extern void out_8 (volatile unsigned *addr, char val);
+extern void out_le16 (volatile unsigned *addr, unsigned short val);
+extern void out_le32 (volatile unsigned *addr, unsigned int val);
+#endif /* CONFIG_IXP425 */
+
+#if defined(CONFIG_MPC8260)
+#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
+static int \
+indirect_##rw##_config_##size(struct pci_controller *hose, \
+ pci_dev_t dev, int offset, type val) \
+{ \
+ u32 b, d,f; \
+ b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
+ b = b - hose->first_busno; \
+ dev = PCI_BDF(b, d, f); \
+ out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
+ sync(); \
+ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
+ return 0; \
+}
+#elif defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
+#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
+static int \
+indirect_##rw##_config_##size(struct pci_controller *hose, \
+ pci_dev_t dev, int offset, type val) \
+{ \
+ u32 b, d,f; \
+ b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
+ b = b - hose->first_busno; \
+ dev = PCI_BDF(b, d, f); \
+ *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
+ sync(); \
+ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
+ return 0; \
+}
+#elif defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SPE)
+#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
+static int \
+indirect_##rw##_config_##size(struct pci_controller *hose, \
+ pci_dev_t dev, int offset, type val) \
+{ \
+ u32 b, d,f; \
+ b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
+ b = b - hose->first_busno; \
+ dev = PCI_BDF(b, d, f); \
+ if (PCI_BUS(dev) > 0) \
+ out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000001); \
+ else \
+ out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
+ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
+ return 0; \
+}
+#else
+#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
+static int \
+indirect_##rw##_config_##size(struct pci_controller *hose, \
+ pci_dev_t dev, int offset, type val) \
+{ \
+ u32 b, d,f; \
+ b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
+ b = b - hose->first_busno; \
+ dev = PCI_BDF(b, d, f); \
+ out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
+ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
+ return 0; \
+}
+#endif
+
+#define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask) \
+static int \
+indirect_##rw##_config_##size(struct pci_controller *hose, \
+ pci_dev_t dev, int offset, type val) \
+{ \
+ unsigned int msr = mfmsr(); \
+ mtmsr(msr & ~(MSR_EE | MSR_CE)); \
+ out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
+ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
+ out_le32(hose->cfg_addr, 0x00000000); \
+ mtmsr(msr); \
+ return 0; \
+}
+
+INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
+INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
+INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
+#ifdef CONFIG_405GP
+INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
+INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
+INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
+#else
+INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
+INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
+INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
+#endif
+
+void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
+{
+ pci_set_ops(hose,
+ indirect_read_config_byte,
+ indirect_read_config_word,
+ indirect_read_config_dword,
+ indirect_write_config_byte,
+ indirect_write_config_word,
+ indirect_write_config_dword);
+
+ hose->cfg_addr = (unsigned int *) cfg_addr;
+ hose->cfg_data = (unsigned char *) cfg_data;
+}
+
+#endif /* !__I386__ && !CONFIG_IXDP425 */
+#endif /* CONFIG_PCI */