1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Renesas Mobile SDHI
  4 *
  5 * Copyright (C) 2017 Horms Solutions Ltd., Simon Horman
  6 * Copyright (C) 2017-19 Renesas Electronics Corporation
  7 */
  8
  9#ifndef RENESAS_SDHI_H
 10#define RENESAS_SDHI_H
 11
 12#include <linux/dmaengine.h>
 13#include <linux/platform_device.h>
 14#include "tmio_mmc.h"
 15
 16struct renesas_sdhi_scc {
 17	unsigned long clk_rate;	/* clock rate for SDR104 */
 18	u32 tap;		/* sampling clock position for SDR104/HS400 (8 TAP) */
 19	u32 tap_hs400_4tap;	/* sampling clock position for HS400 (4 TAP) */
 20};
 21
 22#define SDHI_FLAG_NEED_CLKH_FALLBACK	BIT(0)
 23
 24struct renesas_sdhi_of_data {
 25	unsigned long tmio_flags;
 26	u32	      tmio_ocr_mask;
 27	unsigned long capabilities;
 28	unsigned long capabilities2;
 29	enum dma_slave_buswidth dma_buswidth;
 30	dma_addr_t dma_rx_offset;
 31	unsigned int bus_shift;
 32	int scc_offset;
 33	struct renesas_sdhi_scc *taps;
 34	int taps_num;
 35	unsigned int max_blk_count;
 36	unsigned short max_segs;
 37	unsigned long sdhi_flags;
 38};
 39
 40#define SDHI_CALIB_TABLE_MAX 32
 41
 42#define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q)
 43
 44struct renesas_sdhi_quirks {
 45	bool hs400_disabled;
 46	bool hs400_4taps;
 47	bool fixed_addr_mode;
 48	bool dma_one_rx_only;
 49	bool manual_tap_correction;
 50	bool old_info1_layout;
 51	u32 hs400_bad_taps;
 52	const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
 53};
 54
 55struct renesas_sdhi_of_data_with_quirks {
 56	const struct renesas_sdhi_of_data *of_data;
 57	const struct renesas_sdhi_quirks *quirks;
 58};
 59
 60/* We want both end_flags to be set before we mark DMA as finished */
 61#define SDHI_DMA_END_FLAG_DMA		0
 62#define SDHI_DMA_END_FLAG_ACCESS	1
 63
 64struct renesas_sdhi_dma {
 65	unsigned long end_flags;
 66	enum dma_slave_buswidth dma_buswidth;
 67	dma_filter_fn filter;
 68	void (*enable)(struct tmio_mmc_host *host, bool enable);
 69	struct completion dma_dataend;
 70	struct tasklet_struct dma_complete;
 71};
 72
 73struct renesas_sdhi {
 74	struct clk *clk;
 75	struct clk *clkh;
 76	struct clk *clk_cd;
 77	struct tmio_mmc_data mmc_data;
 78	struct renesas_sdhi_dma dma_priv;
 79	const struct renesas_sdhi_quirks *quirks;
 80	struct pinctrl *pinctrl;
 81	struct pinctrl_state *pins_default, *pins_uhs;
 82	void __iomem *scc_ctl;
 83	u32 scc_tappos;
 84	u32 scc_tappos_hs400;
 85	const u8 *adjust_hs400_calib_table;
 86	bool needs_adjust_hs400;
 87
 88	/* Tuning values: 1 for success, 0 for failure */
 89	DECLARE_BITMAP(taps, BITS_PER_LONG);
 90	/* Sampling data comparison: 1 for match, 0 for mismatch */
 91	DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
 92	unsigned int tap_num;
 93	unsigned int tap_set;
 94
 95	struct reset_control *rstc;
 96};
 97
 98#define host_to_priv(host) \
 99	container_of((host)->pdata, struct renesas_sdhi, mmc_data)
100
101int renesas_sdhi_probe(struct platform_device *pdev,
102		       const struct tmio_mmc_dma_ops *dma_ops,
103		       const struct renesas_sdhi_of_data *of_data,
104		       const struct renesas_sdhi_quirks *quirks);
105void renesas_sdhi_remove(struct platform_device *pdev);
106#endif