renesas_sdhi.h

  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/device.h>
 13#include <linux/dmaengine.h>
 14#include <linux/platform_device.h>
 15#include <linux/workqueue.h>
 16#include "tmio_mmc.h"
 17
 18struct renesas_sdhi_scc {
 19	unsigned long clk_rate;	/* clock rate for SDR104 */
 20	u32 tap;		/* sampling clock position for SDR104/HS400 (8 TAP) */
 21	u32 tap_hs400_4tap;	/* sampling clock position for HS400 (4 TAP) */
 22};
 23
 24#define SDHI_FLAG_NEED_CLKH_FALLBACK	BIT(0)
 25
 26struct renesas_sdhi_of_data {
 27	unsigned long tmio_flags;
 28	u32	      tmio_ocr_mask;
 29	unsigned long capabilities;
 30	unsigned long capabilities2;
 31	enum dma_slave_buswidth dma_buswidth;
 32	dma_addr_t dma_rx_offset;
 33	unsigned int bus_shift;
 34	int scc_offset;
 35	struct renesas_sdhi_scc *taps;
 36	int taps_num;
 37	unsigned int max_blk_count;
 38	unsigned short max_segs;
 39	unsigned long sdhi_flags;
 40};
 41
 42#define SDHI_CALIB_TABLE_MAX 32
 43
 44#define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q)
 45
 46struct renesas_sdhi_quirks {
 47	bool hs400_disabled;
 48	bool hs400_4taps;
 49	bool fixed_addr_mode;
 50	bool dma_one_rx_only;
 51	bool manual_tap_correction;
 52	bool old_info1_layout;
 53	u32 hs400_bad_taps;
 54	const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
 55};
 56
 57struct renesas_sdhi_of_data_with_quirks {
 58	const struct renesas_sdhi_of_data *of_data;
 59	const struct renesas_sdhi_quirks *quirks;
 60};
 61
 62/* We want both end_flags to be set before we mark DMA as finished */
 63#define SDHI_DMA_END_FLAG_DMA		0
 64#define SDHI_DMA_END_FLAG_ACCESS	1
 65
 66struct renesas_sdhi_dma {
 67	unsigned long end_flags;
 68	enum dma_slave_buswidth dma_buswidth;
 69	dma_filter_fn filter;
 70	void (*enable)(struct tmio_mmc_host *host, bool enable);
 71	struct completion dma_dataend;
 72	struct work_struct dma_complete;
 73};
 74
 75struct renesas_sdhi {
 76	struct clk *clk;
 77	struct clk *clkh;
 78	struct clk *clk_cd;
 79	struct tmio_mmc_data mmc_data;
 80	struct renesas_sdhi_dma dma_priv;
 81	const struct renesas_sdhi_quirks *quirks;
 82	struct pinctrl *pinctrl;
 83	struct pinctrl_state *pins_default, *pins_uhs;
 84	void __iomem *scc_ctl;
 85	u32 scc_tappos;
 86	u32 scc_tappos_hs400;
 87	const u8 *adjust_hs400_calib_table;
 88	bool needs_adjust_hs400;
 89	bool card_is_sdio;
 90
 91	/* Tuning values: 1 for success, 0 for failure */
 92	DECLARE_BITMAP(taps, BITS_PER_LONG);
 93	/* Sampling data comparison: 1 for match, 0 for mismatch */
 94	DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
 95	unsigned int tap_num;
 96	unsigned int tap_set;
 97
 98	struct reset_control *rstc;
 99	struct tmio_mmc_host *host;
100	struct regulator_dev *rdev;
101};
102
103#define host_to_priv(host) \
104	container_of((host)->pdata, struct renesas_sdhi, mmc_data)
105
106int renesas_sdhi_probe(struct platform_device *pdev,
107		       const struct tmio_mmc_dma_ops *dma_ops,
108		       const struct renesas_sdhi_of_data *of_data,
109		       const struct renesas_sdhi_quirks *quirks);
110void renesas_sdhi_remove(struct platform_device *pdev);
111int renesas_sdhi_suspend(struct device *dev);
112int renesas_sdhi_resume(struct device *dev);
113#endif