104 lines
4.2 KiB
C
104 lines
4.2 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) 2011 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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#ifndef __SSP_IMX233_H__
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#define __SSP_IMX233_H__
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#include "cpu.h"
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#include "system.h"
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#include "system-target.h"
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#include "pinctrl-imx233.h"
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#include "dma-imx233.h"
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#include "regs/regs-ssp.h"
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#define IMX233_NR_SSP 2
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/* ssp can value 1 or 2 */
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#define __SSP_SELECT(ssp, ssp1, ssp2) ((ssp) == 1 ? (ssp1) : (ssp2))
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#define INT_SRC_SSP_DMA(ssp) __SSP_SELECT(ssp, INT_SRC_SSP1_DMA, INT_SRC_SSP2_DMA)
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#define INT_SRC_SSP_ERROR(ssp) __SSP_SELECT(ssp, INT_SRC_SSP1_ERROR, INT_SRC_SSP2_ERROR)
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#define BP_SSP_CTRL1_ALL_IRQ 0
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#define BM_SSP_CTRL1_ALL_IRQ \
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BM_OR8(SSP_CTRL1, SDIO_IRQ, RESP_ERR_IRQ, RESP_TIMEOUT_IRQ, DATA_TIMEOUT_IRQ, \
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DATA_CRC_IRQ, FIFO_UNDERRUN_IRQ, RECV_TIMEOUT_IRQ, FIFO_OVERRUN_IRQ)
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#define BM_SSP_CTRL1_ALL_IRQ_EN \
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BM_OR8(SSP_CTRL1, SDIO_IRQ_EN, RESP_ERR_IRQ_EN, RESP_TIMEOUT_IRQ_EN, DATA_TIMEOUT_IRQ_EN, \
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DATA_CRC_IRQ_EN, FIFO_UNDERRUN_EN, RECV_TIMEOUT_IRQ_EN, FIFO_OVERRUN_IRQ_EN)
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#define BM_SSP_CTRL1_TIMEOUT_IRQ \
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BM_OR3(SSP_CTRL1, RESP_TIMEOUT_IRQ, DATA_TIMEOUT_IRQ, RECV_TIMEOUT_IRQ)
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#define IMX233_MAX_SSP_XFER_SIZE IMX233_MAX_SINGLE_DMA_XFER_SIZE
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enum imx233_ssp_error_t
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{
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SSP_SUCCESS = 0,
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SSP_ERROR = -1,
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SSP_TIMEOUT = -2,
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};
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enum imx233_ssp_resp_t
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{
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SSP_NO_RESP = 0,
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SSP_SHORT_RESP,
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SSP_LONG_RESP
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};
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typedef void (*ssp_detect_cb_t)(int ssp);
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void imx233_ssp_init(void);
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void imx233_ssp_start(int ssp);
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void imx233_ssp_stop(int ssp);
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/* only softreset between start and stop or it might hang ! */
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void imx233_ssp_softreset(int ssp);
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void imx233_ssp_set_timings(int ssp, int divide, int rate, int timeout);
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void imx233_ssp_set_mode(int ssp, unsigned mode);
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void imx233_ssp_set_bus_width(int ssp, unsigned width);
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/* block_size uses the SSP format so it's actually the log_2 of the block_size */
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void imx233_ssp_set_block_size(int ssp, unsigned log_block_size);
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/* SD/MMC facilities */
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enum imx233_ssp_error_t imx233_ssp_sd_mmc_transfer(int ssp, uint8_t cmd,
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uint32_t cmd_arg, enum imx233_ssp_resp_t resp, void *buffer, unsigned block_count,
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bool wait4irq, bool read, uint32_t *resp_ptr);
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void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
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unsigned drive_strength, bool use_alt);
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void imx233_ssp_setup_ssp2_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
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unsigned drive_strength);
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/* after callback is fired, imx233_ssp_sdmmc_setup_detect needs to be called
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* to enable detection again. If first_time is true, the callback will
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* be called if the sd card is inserted when the function is called, otherwise
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* it will be called on the next insertion change.
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* By default, sd_detect=1 means sd inserted; invert reverses this behaviour */
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void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn,
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bool first_time, bool invert);
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/* needs prior setup with imx233_ssp_sdmmc_setup_detect */
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bool imx233_ssp_sdmmc_is_detect_inverted(int spp);
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/* raw value of the detect pin */
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bool imx233_ssp_sdmmc_detect_raw(int ssp);
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/* corrected value given the invert setting */
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bool imx233_ssp_sdmmc_detect(int ssp);
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/* SD/MMC requires that the card be provided the clock during an init sequence of
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* at least 1msec (or 74 clocks). Does NOT touch the clock so it has to be correct. */
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void imx233_ssp_sd_mmc_power_up_sequence(int ssp);
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#endif /* __SSP_IMX233_H__ */
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