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b4d86f37ea
All recent SDHI instances can be reset via the reset controller. If one is found, use it instead of the open coded reset. This is to get a future-proof sane reset state. Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20210317091622.31890-4-wsa+renesas@sang-engineering.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Renesas Mobile SDHI
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*
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* Copyright (C) 2017 Horms Solutions Ltd., Simon Horman
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* Copyright (C) 2017-19 Renesas Electronics Corporation
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*/
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#ifndef RENESAS_SDHI_H
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#define RENESAS_SDHI_H
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#include <linux/platform_device.h>
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#include "tmio_mmc.h"
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struct renesas_sdhi_scc {
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unsigned long clk_rate; /* clock rate for SDR104 */
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u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */
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u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */
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};
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struct renesas_sdhi_of_data {
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unsigned long tmio_flags;
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u32 tmio_ocr_mask;
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unsigned long capabilities;
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unsigned long capabilities2;
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enum dma_slave_buswidth dma_buswidth;
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dma_addr_t dma_rx_offset;
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unsigned int bus_shift;
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int scc_offset;
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struct renesas_sdhi_scc *taps;
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int taps_num;
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unsigned int max_blk_count;
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unsigned short max_segs;
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};
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#define SDHI_CALIB_TABLE_MAX 32
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struct renesas_sdhi_quirks {
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bool hs400_disabled;
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bool hs400_4taps;
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u32 hs400_bad_taps;
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const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
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};
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struct tmio_mmc_dma {
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enum dma_slave_buswidth dma_buswidth;
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bool (*filter)(struct dma_chan *chan, void *arg);
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void (*enable)(struct tmio_mmc_host *host, bool enable);
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struct completion dma_dataend;
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struct tasklet_struct dma_complete;
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};
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struct renesas_sdhi {
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struct clk *clk;
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struct clk *clk_cd;
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struct tmio_mmc_data mmc_data;
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struct tmio_mmc_dma dma_priv;
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const struct renesas_sdhi_quirks *quirks;
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struct pinctrl *pinctrl;
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struct pinctrl_state *pins_default, *pins_uhs;
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void __iomem *scc_ctl;
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u32 scc_tappos;
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u32 scc_tappos_hs400;
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const u8 *adjust_hs400_calib_table;
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bool needs_adjust_hs400;
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/* Tuning values: 1 for success, 0 for failure */
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DECLARE_BITMAP(taps, BITS_PER_LONG);
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/* Sampling data comparison: 1 for match, 0 for mismatch */
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DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
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unsigned int tap_num;
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unsigned int tap_set;
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struct reset_control *rstc;
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};
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#define host_to_priv(host) \
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container_of((host)->pdata, struct renesas_sdhi, mmc_data)
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int renesas_sdhi_probe(struct platform_device *pdev,
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const struct tmio_mmc_dma_ops *dma_ops);
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int renesas_sdhi_remove(struct platform_device *pdev);
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#endif
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