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/platform_device.h>
13#include "tmio_mmc.h"
14
15struct renesas_sdhi_scc {
16	unsigned long clk_rate;	/* clock rate for SDR104 */
17	u32 tap;		/* sampling clock position for SDR104/HS400 (8 TAP) */
18	u32 tap_hs400_4tap;	/* sampling clock position for HS400 (4 TAP) */
19};
20
21struct renesas_sdhi_of_data {
22	unsigned long tmio_flags;
23	u32	      tmio_ocr_mask;
24	unsigned long capabilities;
25	unsigned long capabilities2;
26	enum dma_slave_buswidth dma_buswidth;
27	dma_addr_t dma_rx_offset;
28	unsigned int bus_shift;
29	int scc_offset;
30	struct renesas_sdhi_scc *taps;
31	int taps_num;
32	unsigned int max_blk_count;
33	unsigned short max_segs;
34};
35
36struct renesas_sdhi_quirks {
37	bool hs400_disabled;
38	bool hs400_4taps;
39	u32 hs400_bad_taps;
40};
41
42struct tmio_mmc_dma {
43	enum dma_slave_buswidth dma_buswidth;
44	bool (*filter)(struct dma_chan *chan, void *arg);
45	void (*enable)(struct tmio_mmc_host *host, bool enable);
46	struct completion	dma_dataend;
47	struct tasklet_struct	dma_complete;
48};
49
50struct renesas_sdhi {
51	struct clk *clk;
52	struct clk *clk_cd;
53	struct tmio_mmc_data mmc_data;
54	struct tmio_mmc_dma dma_priv;
55	const struct renesas_sdhi_quirks *quirks;
56	struct pinctrl *pinctrl;
57	struct pinctrl_state *pins_default, *pins_uhs;
58	void __iomem *scc_ctl;
59	u32 scc_tappos;
60	u32 scc_tappos_hs400;
61	bool doing_tune;
62
63	/* Tuning values: 1 for success, 0 for failure */
64	DECLARE_BITMAP(taps, BITS_PER_LONG);
65	/* Sampling data comparison: 1 for match, 0 for mismatch */
66	DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
67	unsigned int tap_num;
68	unsigned int tap_set;
69};
70
71#define host_to_priv(host) \
72	container_of((host)->pdata, struct renesas_sdhi, mmc_data)
73
74int renesas_sdhi_probe(struct platform_device *pdev,
75		       const struct tmio_mmc_dma_ops *dma_ops);
76int renesas_sdhi_remove(struct platform_device *pdev);
77#endif