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1026 |
ivang |
/*
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* hw_init.c: set up sh7045F internal subunits
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* Pin and memory assignments assume
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* target is Hitachi SH7045F EVB ("lcevb")
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*
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* Provides two initialization routines:
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* A. 'void early_hw_init(void)' for 'start.S'
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* sets up hw needed for early RTEMS boot, and
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* B. 'void bsp_hw_init(void)' for 'bspstart.c'
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* sets up hardware used by this BSP.
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*
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* Author: John M. Mills (jmills@tga.com)
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* COPYRIGHT(c) 2000, TGA Technologies, Inc
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* Norcross, GA 30071 U.S.A
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* Adapted from Hitachi EVB7045F tutorial files by:
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* John M. Mills (jmills@tga.com)
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* TGA Technologies, Inc.
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* 100 Pinnacle Way, Suite 140
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* Norcross, GA 30071 U.S.A.
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*
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*
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* This file may be copied and distributed in accordance
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* the above-referenced license. It is provided for critique and
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* developmental purposes without any warranty nor representation
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* by the authors or by TGA Technologies.
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*
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* hw_init.c,v 1.3 2000/06/12 14:59:51 joel Exp
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*/
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#include <bsp.h>
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#include <stdlib.h>
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#include <rtems/libio.h>
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#include <iosupp.h>
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#include <rtems/score/sh_io.h>
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#include <rtems/score/iosh7045.h>
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/* exported entries */
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extern void bsp_hw_init (void);
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extern void early_hw_init (void);
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/* called from 'start.S' on "#ifdef START_HW_INIT" */
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void early_hw_init (void)
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{
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#ifdef STANDALONE_EVB
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/* STANDALONE_EVB minimally sets up bus and DRAM here */
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/* no STANDALONE_EVB accepts defaults from debug monitor */
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/* FIXME: replace 'magic numbers' with logical names */
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write16(0x2020, BSC_BCR1); /* Bus width access - 32-bit on CS1 */
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write16(0xF3DD, BSC_BCR2); /* Idle cycles CS3-CS0 - 0 idle cycles*/
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write16(0xFF3F, BSC_WCR1); /* Waits for CS3-CS0 - 3 waits on CS1 */
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write16(0x000F, BSC_WCR2); /* Waits for DRAM/DMA access - default */
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write16(0x0000, BSC_DCR); /* DRAM control - default */
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write16(0x0000, BSC_RTCSR); /* DRAM refresh - default */
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write16(0x0000, BSC_RTCNT); /* DRAM refresh counter - default*/
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write16(0x0000, BSC_RTCOR); /* DRAM refresh compare match - default */
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#endif
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/* add early-init functions here */
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};
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/* to be called from 'bspstart.c' */
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void bsp_hw_init (void)
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{
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int a;
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unsigned8 temp8;
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unsigned16 temp16;
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#ifdef STANDALONE_EVB
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/* STANDALONE_EVB: sets up PFC */
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/* no STANDALONE_EVB: accepts defaults, adds RESET */
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/* FIXME: replace 'magic numbers' */
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write16(0x5000, PFC_PACRH); /* Pin function controller - WRHH, WRHL */
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write16(0x1550, PFC_PACRL1); /* Pin fun. controller - WRH,WRL,RD,CS1 */
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write16(0x0000, PFC_PBCR1); /* Pin function controller - default */
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write16(0x2005, PFC_PBCR2); /* Pin fcn. controller - A18,A17,A16 */
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write16(0xFFFF, PFC_PCCR); /* Pin function controller - A15-A0 */
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write16(0x5555, PFC_PDCRH1); /* Pin function controller - D31-D24 */
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write16(0x5555, PFC_PDCRH2); /* Pin function controller - D23-D16 */
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write16(0xFFFF, PFC_PDCRL); /* Pin function controller - D15-D0 */
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write16(0x0000, PFC_IFCR); /* Pin function controller - default */
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write16(0x0000, PFC_PACRL2); /* default disconnects all I/O pins;*/
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/* [re-connected by DEVICE_open()] */
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#endif
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/* default hardware setup for SH7045F EVB */
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/* PFC: General I/O except pin 13 (reset): */
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temp16 = read16(PFC_PECR1);
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temp16 |= 0x0800;
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write16(temp16, PFC_PECR1);
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/* All I/O lines bits 7-0: */
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write16(0x00, PFC_PECR2);
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/* P5 (LED) out, all other pins in: */
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temp16 = read16(PFC_PEIOR);
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temp16 |= 0x0020;
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write16(temp16, PFC_PEIOR);
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}
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