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 | |
15 | struct 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 | |
23 | struct 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 | |
43 | struct 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 | |
54 | struct 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 | |
63 | struct 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 | |
72 | struct 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 | |
100 | int 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); |
104 | void renesas_sdhi_remove(struct platform_device *pdev); |
105 | #endif |
106 | |