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 int renesas_sdhi_remove(struct platform_device *pdev); 105 #endif 106