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