forked from len0rd/rockbox
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2014 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "stddef.h"
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#include "target.h"
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#include "system.h"
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#include "logf.h"
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#include "memory.h"
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/**
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*
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* Global
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*
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*/
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enum pp_family_t
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{
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UNKNOWN,
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PP502x,
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PP611x
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};
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static enum pp_family_t g_pp_family = UNKNOWN;
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#define USEC_TIMER (*(volatile unsigned long *)(0x60005010))
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// NOTE only valid for PP502x and above */
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#define PP_VER1 (*(volatile unsigned long *)(0x70000000))
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#define PP_VER2 (*(volatile unsigned long *)(0x70000004))
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struct hwstub_target_desc_t __attribute__((aligned(2))) target_descriptor =
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{
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sizeof(struct hwstub_target_desc_t),
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HWSTUB_DT_TARGET,
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HWSTUB_TARGET_PP,
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"PP502x / PP611x"
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};
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static struct hwstub_pp_desc_t __attribute__((aligned(2))) pp_descriptor =
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{
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sizeof(struct hwstub_pp_desc_t),
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HWSTUB_DT_PP,
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0, {' ', ' '},
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};
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static uint16_t char2hex(uint8_t c)
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{
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if(c >= '0' && c <= '9')
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return c - '0';
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else
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return 0xf;
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}
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void target_init(void)
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{
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/* try to read version for PP502x */
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if(PP_VER2 >> 16 != ('P' | 'P' << 8))
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{
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logf("unidentified PP family\n");
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g_pp_family = UNKNOWN;
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}
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else
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{
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pp_descriptor.wChipID = char2hex((PP_VER2 >> 8) & 0xff) << 12 |
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char2hex(PP_VER2 & 0xff) << 8 |
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char2hex((PP_VER1 >> 24) & 0xff) << 4 |
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char2hex((PP_VER1 >> 16) & 0xff);
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pp_descriptor.bRevision[0] = (PP_VER1 >> 8) & 0xff;
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pp_descriptor.bRevision[1] = PP_VER1 & 0xff;
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if(pp_descriptor.wChipID >= 0x6110)
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{
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logf("identified PP611x family\n");
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g_pp_family = PP611x;
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}
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else
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{
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logf("identified PP502x family\n");
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g_pp_family = PP502x;
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}
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}
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}
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void target_get_desc(int desc, void **buffer)
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{
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if(desc == HWSTUB_DT_PP)
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*buffer = &pp_descriptor;
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else
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*buffer = NULL;
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}
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void target_get_config_desc(void *buffer, int *size)
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{
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memcpy(buffer, &pp_descriptor, sizeof(pp_descriptor));
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*size += sizeof(pp_descriptor);
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}
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void target_udelay(int us)
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{
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uint32_t end = USEC_TIMER + us;
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while(USEC_TIMER <= end);
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}
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void target_mdelay(int ms)
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{
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return target_udelay(ms * 1000);
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}
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