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Diffstat (limited to 'arch/mips/ddb5xxx/common/nile4.c')
-rw-r--r--arch/mips/ddb5xxx/common/nile4.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/mips/ddb5xxx/common/nile4.c b/arch/mips/ddb5xxx/common/nile4.c
new file mode 100644
index 000000000000..7ec7d903ba97
--- /dev/null
+++ b/arch/mips/ddb5xxx/common/nile4.c
@@ -0,0 +1,130 @@
+/*
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * arch/mips/ddb5xxx/common/nile4.c
+ * misc low-level routines for vrc-5xxx controllers.
+ *
+ * derived from original code by Geert Uytterhoeven <geert@sonycom.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.
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+u32
+ddb_calc_pdar(u32 phys, u32 size, int width,
+ int on_memory_bus, int pci_visible)
+{
+ u32 maskbits;
+ u32 widthbits;
+
+ switch (size) {
+#if 0 /* We don't support 4 GB yet */
+ case 0x100000000: /* 4 GB */
+ maskbits = 4;
+ break;
+#endif
+ case 0x80000000: /* 2 GB */
+ maskbits = 5;
+ break;
+ case 0x40000000: /* 1 GB */
+ maskbits = 6;
+ break;
+ case 0x20000000: /* 512 MB */
+ maskbits = 7;
+ break;
+ case 0x10000000: /* 256 MB */
+ maskbits = 8;
+ break;
+ case 0x08000000: /* 128 MB */
+ maskbits = 9;
+ break;
+ case 0x04000000: /* 64 MB */
+ maskbits = 10;
+ break;
+ case 0x02000000: /* 32 MB */
+ maskbits = 11;
+ break;
+ case 0x01000000: /* 16 MB */
+ maskbits = 12;
+ break;
+ case 0x00800000: /* 8 MB */
+ maskbits = 13;
+ break;
+ case 0x00400000: /* 4 MB */
+ maskbits = 14;
+ break;
+ case 0x00200000: /* 2 MB */
+ maskbits = 15;
+ break;
+ case 0: /* OFF */
+ maskbits = 0;
+ break;
+ default:
+ panic("nile4_set_pdar: unsupported size %p", (void *) size);
+ }
+ switch (width) {
+ case 8:
+ widthbits = 0;
+ break;
+ case 16:
+ widthbits = 1;
+ break;
+ case 32:
+ widthbits = 2;
+ break;
+ case 64:
+ widthbits = 3;
+ break;
+ default:
+ panic("nile4_set_pdar: unsupported width %d", width);
+ }
+
+ return maskbits | (on_memory_bus ? 0x10 : 0) |
+ (pci_visible ? 0x20 : 0) | (widthbits << 6) |
+ (phys & 0xffe00000);
+}
+
+void
+ddb_set_pdar(u32 pdar, u32 phys, u32 size, int width,
+ int on_memory_bus, int pci_visible)
+{
+ u32 temp= ddb_calc_pdar(phys, size, width, on_memory_bus, pci_visible);
+ ddb_out32(pdar, temp);
+ ddb_out32(pdar + 4, 0);
+
+ /*
+ * When programming a PDAR, the register should be read immediately
+ * after writing it. This ensures that address decoders are properly
+ * configured.
+ * [jsun] is this really necessary?
+ */
+ ddb_in32(pdar);
+ ddb_in32(pdar + 4);
+}
+
+/*
+ * routines that mess with PCIINITx registers
+ */
+
+void ddb_set_pmr(u32 pmr, u32 type, u32 addr, u32 options)
+{
+ switch (type) {
+ case DDB_PCICMD_IACK: /* PCI Interrupt Acknowledge */
+ case DDB_PCICMD_IO: /* PCI I/O Space */
+ case DDB_PCICMD_MEM: /* PCI Memory Space */
+ case DDB_PCICMD_CFG: /* PCI Configuration Space */
+ break;
+ default:
+ panic("nile4_set_pmr: invalid type %d", type);
+ }
+ ddb_out32(pmr, (type << 1) | (addr & 0xffe00000) | options );
+ ddb_out32(pmr + 4, 0);
+}