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fuze+: add more clocking code, add dma code, add ssp code, add stub usb code, update storage to SD + MMC, beginning of the driver

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30010 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly 2011-06-17 22:30:58 +00:00
parent d4800fa385
commit 2cf3313382
15 changed files with 1069 additions and 4 deletions
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100
firmware/target/arm/imx233/mmc-imx233.c Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by Amaury Pouly
*
* 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.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "mmc.h"
#include "sdmmc.h"
#include "ssp-imx233.h"
#include "pinctrl-imx233.h"
#include "button-target.h"
#ifdef SANSA_FUZEPLUS
#define MMC_SSP 2
#else
#error You need to configure the ssp to use
#endif
int mmc_init(void)
{
imx233_ssp_start(MMC_SSP);
imx233_ssp_softreset(MMC_SSP);
imx233_ssp_set_mode(MMC_SSP, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
#ifdef SANSA_FUZEPLUS
/** Sansa Fuze+ has an internal eMMC 8-bit wide flash, power gate is pin PWM3 */
imx233_set_pin_function(1, 29, PINCTRL_FUNCTION_GPIO);
imx233_enable_gpio_output(1, 29, true);
imx233_set_gpio_output(1, 29, false);
imx233_ssp_setup_ssp2_sd_mmc_pins(true, 8, PINCTRL_DRIVE_8mA);
#endif
/* SSPCLK @ 120MHz
* gives bitrate of 120 / 100 / 3 = 400kHz */
imx233_ssp_set_timings(MMC_SSP, 100, 2);
imx233_ssp_set_timeout(MMC_SSP, 0xffff);
imx233_ssp_sd_mmc_power_up_sequence(MMC_SSP);
/* go to idle state */
int ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, SD_GO_IDLE_STATE, 0, SSP_NO_RESP, NULL, 0, false, NULL);
if(ret != 0)
return -1;
/* send op cond until the card respond with busy bit set; it must complete within 1sec */
unsigned timeout = current_tick + HZ;
do
{
uint32_t ocr;
ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 1, 0x40ff8000, SSP_SHORT_RESP, NULL, 0, false, &ocr);
if(ret == 0 && ocr & (1 << 31))
break;
}while(!TIME_AFTER(current_tick, timeout));
if(ret != 0)
return -2;
uint32_t cid[4];
ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 2, 0, SSP_LONG_RESP, NULL, 0, false, cid);
if(ret != 0)
return -3;
return 0;
}
int mmc_num_drives(int first_drive)
{
(void) first_drive;
return 1;
}
int mmc_read_sectors(IF_MD2(int drive,) unsigned long start, int count, void* buf)
{
IF_MD((void) drive);
(void) start;
(void) count;
(void) buf;
return -1;
}
int mmc_write_sectors(IF_MD2(int drive,) unsigned long start, int count, const void* buf)
{
IF_MD((void) drive);
(void) start;
(void) count;
(void) buf;
return -1;
}