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Diffstat (limited to 'cpu/mpc86xx/pcie_indirect.c')
-rw-r--r--cpu/mpc86xx/pcie_indirect.c199
1 files changed, 199 insertions, 0 deletions
diff --git a/cpu/mpc86xx/pcie_indirect.c b/cpu/mpc86xx/pcie_indirect.c
new file mode 100644
index 0000000..b00ad76
--- /dev/null
+++ b/cpu/mpc86xx/pcie_indirect.c
@@ -0,0 +1,199 @@
+/*
+ * Support for indirect PCI bridges.
+ *
+ * Copyright (c) Freescale Semiconductor, Inc.
+ * 2006. All rights reserved.
+ *
+ * Jason Jin <Jason.jin@freescale.com>
+ *
+ * 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.
+ *
+ * partly derived from
+ * arch/powerpc/platforms/86xx/mpc86xx_pcie.c
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_PCI
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <pci.h>
+
+#define PCI_CFG_OUT out_be32
+#define PEX_FIX out_be32(hose->cfg_addr+0x4, 0x0400ffff)
+
+static int
+indirect_read_config_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ int len,
+ u32 *val)
+{
+ int bus = PCI_BUS(dev);
+
+ volatile unsigned char *cfg_data;
+ u32 temp;
+
+ PEX_FIX;
+ if (bus == 0xff) {
+ PCI_CFG_OUT(hose->cfg_addr,
+ dev | (offset & 0xfc) | 0x80000001);
+ } else {
+ PCI_CFG_OUT(hose->cfg_addr,
+ dev | (offset & 0xfc) | 0x80000000);
+ }
+ /*
+ * 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;
+ PEX_FIX;
+ temp = in_le32((u32 *) 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 0;
+}
+
+static int
+indirect_write_config_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ int len,
+ u32 val)
+{
+ int bus = PCI_BUS(dev);
+ volatile unsigned char *cfg_data;
+ u32 temp;
+
+ PEX_FIX;
+ if (bus == 0xff) {
+ PCI_CFG_OUT(hose->cfg_addr,
+ dev | (offset & 0xfc) | 0x80000001);
+ } else {
+ PCI_CFG_OUT(hose->cfg_addr,
+ dev | (offset & 0xfc) | 0x80000000);
+ }
+
+ /*
+ * 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:
+ PEX_FIX;
+ temp = in_le32((u32 *) cfg_data);
+ temp = (temp & ~(0xff << ((offset & 3) * 8))) |
+ (val << ((offset & 3) * 8));
+ PEX_FIX;
+ out_le32((u32 *) cfg_data, temp);
+ break;
+ case 2:
+ PEX_FIX;
+ temp = in_le32((u32 *) cfg_data);
+ temp = (temp & ~(0xffff << ((offset & 3) * 8)));
+ temp |= (val << ((offset & 3) * 8));
+ PEX_FIX;
+ out_le32((u32 *) cfg_data, temp);
+ break;
+ default:
+ PEX_FIX;
+ out_le32((u32 *) cfg_data, val);
+ break;
+ }
+ PEX_FIX;
+ return 0;
+}
+
+static int
+indirect_read_config_byte_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ u8 *val)
+{
+ u32 val32;
+ indirect_read_config_pcie(hose, dev, offset, 1, &val32);
+ *val = (u8) val32;
+ return 0;
+}
+
+static int
+indirect_read_config_word_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ u16 *val)
+{
+ u32 val32;
+ indirect_read_config_pcie(hose, dev, offset, 2, &val32);
+ *val = (u16) val32;
+ return 0;
+}
+
+static int
+indirect_read_config_dword_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ u32 *val)
+{
+ return indirect_read_config_pcie(hose, dev, offset, 4, val);
+}
+
+static int
+indirect_write_config_byte_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ u8 val)
+{
+ return indirect_write_config_pcie(hose, dev, offset, 1, (u32) val);
+}
+
+static int
+indirect_write_config_word_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ unsigned short val)
+{
+ return indirect_write_config_pcie(hose, dev, offset, 2, (u32) val);
+}
+
+static int
+indirect_write_config_dword_pcie(struct pci_controller *hose,
+ pci_dev_t dev,
+ int offset,
+ u32 val)
+{
+ return indirect_write_config_pcie(hose, dev, offset, 4, val);
+}
+
+void
+pcie_setup_indirect(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
+{
+ pci_set_ops(hose,
+ indirect_read_config_byte_pcie,
+ indirect_read_config_word_pcie,
+ indirect_read_config_dword_pcie,
+ indirect_write_config_byte_pcie,
+ indirect_write_config_word_pcie,
+ indirect_write_config_dword_pcie);
+
+ hose->cfg_addr = (unsigned int *)cfg_addr;
+ hose->cfg_data = (unsigned char *)cfg_data;
+}
+
+#endif /* CONFIG_PCI */