summaryrefslogtreecommitdiff
path: root/drivers/mmc/host/renesas_sdhi.h
blob: 24958de274c174af42f196e282d38c7f31bd1686 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Renesas Mobile SDHI
 *
 * Copyright (C) 2017 Horms Solutions Ltd., Simon Horman
 * Copyright (C) 2017-19 Renesas Electronics Corporation
 */

#ifndef RENESAS_SDHI_H
#define RENESAS_SDHI_H

#include <linux/platform_device.h>
#include "tmio_mmc.h"

struct renesas_sdhi_scc {
	unsigned long clk_rate;	/* clock rate for SDR104 */
	u32 tap;		/* sampling clock position for SDR104/HS400 (8 TAP) */
	u32 tap_hs400_4tap;	/* sampling clock position for HS400 (4 TAP) */
};

struct renesas_sdhi_of_data {
	unsigned long tmio_flags;
	u32	      tmio_ocr_mask;
	unsigned long capabilities;
	unsigned long capabilities2;
	enum dma_slave_buswidth dma_buswidth;
	dma_addr_t dma_rx_offset;
	unsigned int bus_shift;
	int scc_offset;
	struct renesas_sdhi_scc *taps;
	int taps_num;
	unsigned int max_blk_count;
	unsigned short max_segs;
};

#define SDHI_CALIB_TABLE_MAX 32

struct renesas_sdhi_quirks {
	bool hs400_disabled;
	bool hs400_4taps;
	u32 hs400_bad_taps;
	const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
};

struct tmio_mmc_dma {
	enum dma_slave_buswidth dma_buswidth;
	bool (*filter)(struct dma_chan *chan, void *arg);
	void (*enable)(struct tmio_mmc_host *host, bool enable);
	struct completion	dma_dataend;
	struct tasklet_struct	dma_complete;
};

struct renesas_sdhi {
	struct clk *clk;
	struct clk *clk_cd;
	struct tmio_mmc_data mmc_data;
	struct tmio_mmc_dma dma_priv;
	const struct renesas_sdhi_quirks *quirks;
	struct pinctrl *pinctrl;
	struct pinctrl_state *pins_default, *pins_uhs;
	void __iomem *scc_ctl;
	u32 scc_tappos;
	u32 scc_tappos_hs400;
	const u8 *adjust_hs400_calib_table;
	bool needs_adjust_hs400;
	bool doing_tune;

	/* Tuning values: 1 for success, 0 for failure */
	DECLARE_BITMAP(taps, BITS_PER_LONG);
	/* Sampling data comparison: 1 for match, 0 for mismatch */
	DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
	unsigned int tap_num;
	unsigned int tap_set;
};

#define host_to_priv(host) \
	container_of((host)->pdata, struct renesas_sdhi, mmc_data)

int renesas_sdhi_probe(struct platform_device *pdev,
		       const struct tmio_mmc_dma_ops *dma_ops);
int renesas_sdhi_remove(struct platform_device *pdev);
#endif