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/dmaengine.h> 13 #include <linux/platform_device.h> 14 #include "tmio_mmc.h" 15 16 struct renesas_sdhi_scc { 17 unsigned long clk_rate; /* clock rate for SDR104 */ 18 u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */ 19 u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */ 20 }; 21 22 #define SDHI_FLAG_NEED_CLKH_FALLBACK BIT(0) 23 24 struct renesas_sdhi_of_data { 25 unsigned long tmio_flags; 26 u32 tmio_ocr_mask; 27 unsigned long capabilities; 28 unsigned long capabilities2; 29 enum dma_slave_buswidth dma_buswidth; 30 dma_addr_t dma_rx_offset; 31 unsigned int bus_shift; 32 int scc_offset; 33 struct renesas_sdhi_scc *taps; 34 int taps_num; 35 unsigned int max_blk_count; 36 unsigned short max_segs; 37 unsigned long sdhi_flags; 38 }; 39 40 #define SDHI_CALIB_TABLE_MAX 32 41 42 #define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q) 43 44 struct renesas_sdhi_quirks { 45 bool hs400_disabled; 46 bool hs400_4taps; 47 bool fixed_addr_mode; 48 bool dma_one_rx_only; 49 bool manual_tap_correction; 50 bool old_info1_layout; 51 u32 hs400_bad_taps; 52 const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX]; 53 }; 54 55 struct renesas_sdhi_of_data_with_quirks { 56 const struct renesas_sdhi_of_data *of_data; 57 const struct renesas_sdhi_quirks *quirks; 58 }; 59 60 /* We want both end_flags to be set before we mark DMA as finished */ 61 #define SDHI_DMA_END_FLAG_DMA 0 62 #define SDHI_DMA_END_FLAG_ACCESS 1 63 64 struct renesas_sdhi_dma { 65 unsigned long end_flags; 66 enum dma_slave_buswidth dma_buswidth; 67 dma_filter_fn filter; 68 void (*enable)(struct tmio_mmc_host *host, bool enable); 69 struct completion dma_dataend; 70 struct tasklet_struct dma_complete; 71 }; 72 73 struct renesas_sdhi { 74 struct clk *clk; 75 struct clk *clkh; 76 struct clk *clk_cd; 77 struct tmio_mmc_data mmc_data; 78 struct renesas_sdhi_dma dma_priv; 79 const struct renesas_sdhi_quirks *quirks; 80 struct pinctrl *pinctrl; 81 struct pinctrl_state *pins_default, *pins_uhs; 82 void __iomem *scc_ctl; 83 u32 scc_tappos; 84 u32 scc_tappos_hs400; 85 const u8 *adjust_hs400_calib_table; 86 bool needs_adjust_hs400; 87 88 /* Tuning values: 1 for success, 0 for failure */ 89 DECLARE_BITMAP(taps, BITS_PER_LONG); 90 /* Sampling data comparison: 1 for match, 0 for mismatch */ 91 DECLARE_BITMAP(smpcmp, BITS_PER_LONG); 92 unsigned int tap_num; 93 unsigned int tap_set; 94 95 struct reset_control *rstc; 96 }; 97 98 #define host_to_priv(host) \ 99 container_of((host)->pdata, struct renesas_sdhi, mmc_data) 100 101 int renesas_sdhi_probe(struct platform_device *pdev, 102 const struct tmio_mmc_dma_ops *dma_ops, 103 const struct renesas_sdhi_of_data *of_data, 104 const struct renesas_sdhi_quirks *quirks); 105 void renesas_sdhi_remove(struct platform_device *pdev); 106 #endif 107