96d355abba
At high speed, we need a drive strength of 8mA on the clock line to get stable transfers. Change-Id: Ida668db10cd3e10ad5740e35fd973f2fa394edb2
120 lines
4.8 KiB
C
120 lines
4.8 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
#ifndef __SSP_IMX233_H__
|
|
#define __SSP_IMX233_H__
|
|
|
|
#include "cpu.h"
|
|
#include "system.h"
|
|
#include "system-target.h"
|
|
#include "pinctrl-imx233.h"
|
|
#include "dma-imx233.h"
|
|
|
|
#include "regs/regs-ssp.h"
|
|
|
|
#if IMX233_SUBTARGET < 3700
|
|
#define IMX233_NR_SSP 1
|
|
#else
|
|
#define IMX233_NR_SSP 2
|
|
#endif
|
|
|
|
/* ssp can value 1 or 2 */
|
|
#if IMX233_NR_SSP >= 2
|
|
#define __SSP_SELECT(ssp, ssp1, ssp2) ((ssp) == 1 ? (ssp1) : (ssp2))
|
|
#else
|
|
#define __SSP_SELECT(ssp, ssp1, ssp2) (ssp1)
|
|
#endif
|
|
|
|
#define INT_SRC_SSP_DMA(ssp) __SSP_SELECT(ssp, INT_SRC_SSP1_DMA, INT_SRC_SSP2_DMA)
|
|
#define INT_SRC_SSP_ERROR(ssp) __SSP_SELECT(ssp, INT_SRC_SSP1_ERROR, INT_SRC_SSP2_ERROR)
|
|
|
|
#define BP_SSP_CTRL1_ALL_IRQ 0
|
|
#if IMX233_SUBTARGET < 3700
|
|
#define BM_SSP_CTRL1_ALL_IRQ \
|
|
BM_OR7(SSP_CTRL1, SDIO_IRQ, RESP_ERR_IRQ, RESP_TIMEOUT_IRQ, DATA_TIMEOUT_IRQ, \
|
|
DATA_CRC_IRQ, RECV_TIMEOUT_IRQ, RECV_OVRFLW_IRQ)
|
|
#define BM_SSP_CTRL1_ALL_IRQ_EN \
|
|
BM_OR7(SSP_CTRL1, SDIO_IRQ_EN, RESP_ERR_IRQ_EN, RESP_TIMEOUT_IRQ_EN, DATA_TIMEOUT_IRQ_EN, \
|
|
DATA_CRC_IRQ_EN, RECV_TIMEOUT_IRQ_EN, RECV_OVRFLW_IRQ_EN)
|
|
#else
|
|
#define BM_SSP_CTRL1_ALL_IRQ \
|
|
BM_OR8(SSP_CTRL1, SDIO_IRQ, RESP_ERR_IRQ, RESP_TIMEOUT_IRQ, DATA_TIMEOUT_IRQ, \
|
|
DATA_CRC_IRQ, FIFO_UNDERRUN_IRQ, RECV_TIMEOUT_IRQ, FIFO_OVERRUN_IRQ)
|
|
#define BM_SSP_CTRL1_ALL_IRQ_EN \
|
|
BM_OR8(SSP_CTRL1, SDIO_IRQ_EN, RESP_ERR_IRQ_EN, RESP_TIMEOUT_IRQ_EN, DATA_TIMEOUT_IRQ_EN, \
|
|
DATA_CRC_IRQ_EN, FIFO_UNDERRUN_EN, RECV_TIMEOUT_IRQ_EN, FIFO_OVERRUN_IRQ_EN)
|
|
#endif
|
|
|
|
#define BM_SSP_CTRL1_TIMEOUT_IRQ \
|
|
BM_OR3(SSP_CTRL1, RESP_TIMEOUT_IRQ, DATA_TIMEOUT_IRQ, RECV_TIMEOUT_IRQ)
|
|
|
|
#define IMX233_MAX_SSP_XFER_SIZE IMX233_MAX_SINGLE_DMA_XFER_SIZE
|
|
|
|
enum imx233_ssp_error_t
|
|
{
|
|
SSP_SUCCESS = 0,
|
|
SSP_ERROR = -1,
|
|
SSP_TIMEOUT = -2,
|
|
};
|
|
|
|
enum imx233_ssp_resp_t
|
|
{
|
|
SSP_NO_RESP = 0,
|
|
SSP_SHORT_RESP,
|
|
SSP_LONG_RESP
|
|
};
|
|
|
|
typedef void (*ssp_detect_cb_t)(int ssp);
|
|
|
|
void imx233_ssp_init(void);
|
|
void imx233_ssp_start(int ssp);
|
|
void imx233_ssp_stop(int ssp);
|
|
/* only softreset between start and stop or it might hang ! */
|
|
void imx233_ssp_softreset(int ssp);
|
|
void imx233_ssp_set_timings(int ssp, int divide, int rate, int timeout);
|
|
void imx233_ssp_set_mode(int ssp, unsigned mode);
|
|
void imx233_ssp_set_bus_width(int ssp, unsigned width);
|
|
/* block_size uses the SSP format so it's actually the log_2 of the block_size */
|
|
void imx233_ssp_set_block_size(int ssp, unsigned log_block_size);
|
|
/* SD/MMC facilities */
|
|
enum imx233_ssp_error_t imx233_ssp_sd_mmc_transfer(int ssp, uint8_t cmd,
|
|
uint32_t cmd_arg, enum imx233_ssp_resp_t resp, void *buffer, unsigned block_count,
|
|
bool wait4irq, bool read, uint32_t *resp_ptr);
|
|
/* pullups/alternative are ignored on targets which don't support it */
|
|
void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width, bool use_alt);
|
|
void imx233_ssp_setup_ssp2_sd_mmc_pins(bool enable_pullups, unsigned bus_width);
|
|
/* after callback is fired, imx233_ssp_sdmmc_setup_detect needs to be called
|
|
* to enable detection again. If first_time is true, the callback will
|
|
* be called if the sd card is inserted when the function is called, otherwise
|
|
* it will be called on the next insertion change.
|
|
* By default, sd_detect=1 means sd inserted; invert reverses this behaviour */
|
|
void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn,
|
|
bool first_time, bool invert);
|
|
/* needs prior setup with imx233_ssp_sdmmc_setup_detect */
|
|
bool imx233_ssp_sdmmc_is_detect_inverted(int spp);
|
|
/* raw value of the detect pin */
|
|
bool imx233_ssp_sdmmc_detect_raw(int ssp);
|
|
/* corrected value given the invert setting */
|
|
bool imx233_ssp_sdmmc_detect(int ssp);
|
|
/* SD/MMC requires that the card be provided the clock during an init sequence of
|
|
* at least 1msec (or 74 clocks). Does NOT touch the clock so it has to be correct. */
|
|
void imx233_ssp_sd_mmc_power_up_sequence(int ssp);
|
|
|
|
#endif /* __SSP_IMX233_H__ */
|