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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Renesas Mobile SDHI
*
* Copyright (C) 2017 Horms Solutions Ltd., Simon Horman
* Copyright (C) 2017-19 Renesas Electronics Corporation
*/
#ifndef RENESAS_SDHI_H
#define RENESAS_SDHI_H
#include <linux/dmaengine.h>
#include <linux/platform_device.h>
#include "tmio_mmc.h"
struct renesas_sdhi_scc {
unsigned long clk_rate; /* clock rate for SDR104 */
u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */
u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */
};
#define SDHI_FLAG_NEED_CLKH_FALLBACK BIT(0)
struct renesas_sdhi_of_data {
unsigned long tmio_flags;
u32 tmio_ocr_mask;
unsigned long capabilities;
unsigned long capabilities2;
enum dma_slave_buswidth dma_buswidth;
dma_addr_t dma_rx_offset;
unsigned int bus_shift;
int scc_offset;
struct renesas_sdhi_scc *taps;
int taps_num;
unsigned int max_blk_count;
unsigned short max_segs;
unsigned long sdhi_flags;
};
#define SDHI_CALIB_TABLE_MAX 32
#define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q)
struct renesas_sdhi_quirks {
bool hs400_disabled;
bool hs400_4taps;
bool fixed_addr_mode;
bool dma_one_rx_only;
bool manual_tap_correction;
bool old_info1_layout;
u32 hs400_bad_taps;
const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
};
struct renesas_sdhi_of_data_with_quirks {
const struct renesas_sdhi_of_data *of_data;
const struct renesas_sdhi_quirks *quirks;
};
/* We want both end_flags to be set before we mark DMA as finished */
#define SDHI_DMA_END_FLAG_DMA 0
#define SDHI_DMA_END_FLAG_ACCESS 1
struct renesas_sdhi_dma {
unsigned long end_flags;
enum dma_slave_buswidth dma_buswidth;
dma_filter_fn filter;
void (*enable)(struct tmio_mmc_host *host, bool enable);
struct completion dma_dataend;
struct tasklet_struct dma_complete;
};
struct renesas_sdhi {
struct clk *clk;
struct clk *clkh;
struct clk *clk_cd;
struct tmio_mmc_data mmc_data;
struct renesas_sdhi_dma dma_priv;
const struct renesas_sdhi_quirks *quirks;
struct pinctrl *pinctrl;
struct pinctrl_state *pins_default, *pins_uhs;
void __iomem *scc_ctl;
u32 scc_tappos;
u32 scc_tappos_hs400;
const u8 *adjust_hs400_calib_table;
bool needs_adjust_hs400;
/* Tuning values: 1 for success, 0 for failure */
DECLARE_BITMAP(taps, BITS_PER_LONG);
/* Sampling data comparison: 1 for match, 0 for mismatch */
DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
unsigned int tap_num;
unsigned int tap_set;
struct reset_control *rstc;
};
#define host_to_priv(host) \
container_of((host)->pdata, struct renesas_sdhi, mmc_data)
int renesas_sdhi_probe(struct platform_device *pdev,
const struct tmio_mmc_dma_ops *dma_ops,
const struct renesas_sdhi_of_data *of_data,
const struct renesas_sdhi_quirks *quirks);
void renesas_sdhi_remove(struct platform_device *pdev);
#endif
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