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/*
*
* 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);
}
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