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Linux kernel mirror (for testing)
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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
41struct renesas_sdhi_quirks {
42 bool hs400_disabled;
43 bool hs400_4taps;
44 bool fixed_addr_mode;
45 bool dma_one_rx_only;
46 bool manual_tap_correction;
47 u32 hs400_bad_taps;
48 const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
49};
50
51struct renesas_sdhi_of_data_with_quirks {
52 const struct renesas_sdhi_of_data *of_data;
53 const struct renesas_sdhi_quirks *quirks;
54};
55
56struct tmio_mmc_dma {
57 enum dma_slave_buswidth dma_buswidth;
58 bool (*filter)(struct dma_chan *chan, void *arg);
59 void (*enable)(struct tmio_mmc_host *host, bool enable);
60 struct completion dma_dataend;
61 struct tasklet_struct dma_complete;
62};
63
64struct renesas_sdhi {
65 struct clk *clk;
66 struct clk *clkh;
67 struct clk *clk_cd;
68 struct tmio_mmc_data mmc_data;
69 struct tmio_mmc_dma dma_priv;
70 const struct renesas_sdhi_quirks *quirks;
71 struct pinctrl *pinctrl;
72 struct pinctrl_state *pins_default, *pins_uhs;
73 void __iomem *scc_ctl;
74 u32 scc_tappos;
75 u32 scc_tappos_hs400;
76 const u8 *adjust_hs400_calib_table;
77 bool needs_adjust_hs400;
78
79 /* Tuning values: 1 for success, 0 for failure */
80 DECLARE_BITMAP(taps, BITS_PER_LONG);
81 /* Sampling data comparison: 1 for match, 0 for mismatch */
82 DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
83 unsigned int tap_num;
84 unsigned int tap_set;
85
86 struct reset_control *rstc;
87};
88
89#define host_to_priv(host) \
90 container_of((host)->pdata, struct renesas_sdhi, mmc_data)
91
92int renesas_sdhi_probe(struct platform_device *pdev,
93 const struct tmio_mmc_dma_ops *dma_ops,
94 const struct renesas_sdhi_of_data *of_data,
95 const struct renesas_sdhi_quirks *quirks);
96int renesas_sdhi_remove(struct platform_device *pdev);
97#endif