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