mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-21 07:59:55 +02:00
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
|
/*
|
||
|
|
* BCM47XX Sonics SiliconBackplane SDRAM controller core hardware definitions.
|
||
|
|
*
|
||
|
|
* Copyright 2006, Broadcom Corporation
|
||
|
|
* All Rights Reserved.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
|
||
|
|
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
|
||
|
|
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
|
||
|
|
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
|
||
|
|
*
|
||
|
|
* $Id: sbsdram.h,v 1.1.1.9 2006/03/02 13:03:52 honor Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _SBSDRAM_H
|
||
|
|
#define _SBSDRAM_H
|
||
|
|
|
||
|
|
#ifndef _LANGUAGE_ASSEMBLY
|
||
|
|
|
||
|
|
/* Sonics side: SDRAM core registers */
|
||
|
|
typedef volatile struct sbsdramregs {
|
||
|
|
uint32 initcontrol; /* Generates external SDRAM initialization sequence */
|
||
|
|
uint32 config; /* Initializes external SDRAM mode register */
|
||
|
|
uint32 refresh; /* Controls external SDRAM refresh rate */
|
||
|
|
uint32 pad1;
|
||
|
|
uint32 pad2;
|
||
|
|
} sbsdramregs_t;
|
||
|
|
|
||
|
|
/* SDRAM simulation */
|
||
|
|
#ifdef RAMSZ
|
||
|
|
#define SDRAMSZ RAMSZ
|
||
|
|
#else
|
||
|
|
#define SDRAMSZ (4 * 1024 * 1024)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
extern uchar sdrambuf[SDRAMSZ];
|
||
|
|
|
||
|
|
#endif /* _LANGUAGE_ASSEMBLY */
|
||
|
|
|
||
|
|
/* SDRAM initialization control (initcontrol) register bits */
|
||
|
|
#define SDRAM_CBR 0x0001 /* Writing 1 generates refresh cycle and toggles bit */
|
||
|
|
#define SDRAM_PRE 0x0002 /* Writing 1 generates precharge cycle and toggles bit */
|
||
|
|
#define SDRAM_MRS 0x0004 /* Writing 1 generates mode register select cycle and toggles bit */
|
||
|
|
#define SDRAM_EN 0x0008 /* When set, enables access to SDRAM */
|
||
|
|
#define SDRAM_16Mb 0x0000 /* Use 16 Megabit SDRAM */
|
||
|
|
#define SDRAM_64Mb 0x0010 /* Use 64 Megabit SDRAM */
|
||
|
|
#define SDRAM_128Mb 0x0020 /* Use 128 Megabit SDRAM */
|
||
|
|
#define SDRAM_RSVMb 0x0030 /* Use special SDRAM */
|
||
|
|
#define SDRAM_RST 0x0080 /* Writing 1 causes soft reset of controller */
|
||
|
|
#define SDRAM_SELFREF 0x0100 /* Writing 1 enables self refresh mode */
|
||
|
|
#define SDRAM_PWRDOWN 0x0200 /* Writing 1 causes controller to power down */
|
||
|
|
#define SDRAM_32BIT 0x0400 /* When set, indicates 32 bit SDRAM interface */
|
||
|
|
#define SDRAM_9BITCOL 0x0800 /* When set, indicates 9 bit column */
|
||
|
|
|
||
|
|
/* SDRAM configuration (config) register bits */
|
||
|
|
#define SDRAM_BURSTFULL 0x0000 /* Use full page bursts */
|
||
|
|
#define SDRAM_BURST8 0x0001 /* Use burst of 8 */
|
||
|
|
#define SDRAM_BURST4 0x0002 /* Use burst of 4 */
|
||
|
|
#define SDRAM_BURST2 0x0003 /* Use burst of 2 */
|
||
|
|
#define SDRAM_CAS3 0x0000 /* Use CAS latency of 3 */
|
||
|
|
#define SDRAM_CAS2 0x0004 /* Use CAS latency of 2 */
|
||
|
|
|
||
|
|
/* SDRAM refresh control (refresh) register bits */
|
||
|
|
#define SDRAM_REF(p) (((p)&0xff) | SDRAM_REF_EN) /* Refresh period */
|
||
|
|
#define SDRAM_REF_EN 0x8000 /* Writing 1 enables periodic refresh */
|
||
|
|
|
||
|
|
/* SDRAM Core default Init values (OCP ID 0x803) */
|
||
|
|
#define SDRAM_INIT MEM4MX16X2
|
||
|
|
#define SDRAM_CONFIG SDRAM_BURSTFULL
|
||
|
|
#define SDRAM_REFRESH SDRAM_REF(0x40)
|
||
|
|
|
||
|
|
#define MEM1MX16 0x009 /* 2 MB */
|
||
|
|
#define MEM1MX16X2 0x409 /* 4 MB */
|
||
|
|
#define MEM2MX8X2 0x809 /* 4 MB */
|
||
|
|
#define MEM2MX8X4 0xc09 /* 8 MB */
|
||
|
|
#define MEM2MX32 0x439 /* 8 MB */
|
||
|
|
#define MEM4MX16 0x019 /* 8 MB */
|
||
|
|
#define MEM4MX16X2 0x419 /* 16 MB */
|
||
|
|
#define MEM8MX8X2 0x819 /* 16 MB */
|
||
|
|
#define MEM8MX16 0x829 /* 16 MB */
|
||
|
|
#define MEM4MX32 0x429 /* 16 MB */
|
||
|
|
#define MEM8MX8X4 0xc19 /* 32 MB */
|
||
|
|
#define MEM8MX16X2 0xc29 /* 32 MB */
|
||
|
|
|
||
|
|
#endif /* _SBSDRAM_H */
|