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 <linux/workqueue.h> 15 #include "tmio_mmc.h" 16 17 struct renesas_sdhi_scc { 18 unsigned long clk_rate; /* clock rate for SDR104 */ 19 u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */ 20 u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */ 21 }; 22 23 #define SDHI_FLAG_NEED_CLKH_FALLBACK BIT(0) 24 25 struct renesas_sdhi_of_data { 26 unsigned long tmio_flags; 27 u32 tmio_ocr_mask; 28 unsigned long capabilities; 29 unsigned long capabilities2; 30 enum dma_slave_buswidth dma_buswidth; 31 dma_addr_t dma_rx_offset; 32 unsigned int bus_shift; 33 int scc_offset; 34 struct renesas_sdhi_scc *taps; 35 int taps_num; 36 unsigned int max_blk_count; 37 unsigned short max_segs; 38 unsigned long sdhi_flags; 39 }; 40 41 #define SDHI_CALIB_TABLE_MAX 32 42 43 #define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q) 44 45 struct renesas_sdhi_quirks { 46 bool hs400_disabled; 47 bool hs400_4taps; 48 bool fixed_addr_mode; 49 bool dma_one_rx_only; 50 bool manual_tap_correction; 51 bool old_info1_layout; 52 u32 hs400_bad_taps; 53 const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX]; 54 }; 55 56 struct renesas_sdhi_of_data_with_quirks { 57 const struct renesas_sdhi_of_data *of_data; 58 const struct renesas_sdhi_quirks *quirks; 59 }; 60 61 /* We want both end_flags to be set before we mark DMA as finished */ 62 #define SDHI_DMA_END_FLAG_DMA 0 63 #define SDHI_DMA_END_FLAG_ACCESS 1 64 65 struct renesas_sdhi_dma { 66 unsigned long end_flags; 67 enum dma_slave_buswidth dma_buswidth; 68 dma_filter_fn filter; 69 void (*enable)(struct tmio_mmc_host *host, bool enable); 70 struct completion dma_dataend; 71 struct work_struct dma_complete; 72 }; 73 74 struct renesas_sdhi { 75 struct clk *clk; 76 struct clk *clkh; 77 struct clk *clk_cd; 78 struct tmio_mmc_data mmc_data; 79 struct renesas_sdhi_dma dma_priv; 80 const struct renesas_sdhi_quirks *quirks; 81 struct pinctrl *pinctrl; 82 struct pinctrl_state *pins_default, *pins_uhs; 83 void __iomem *scc_ctl; 84 u32 scc_tappos; 85 u32 scc_tappos_hs400; 86 const u8 *adjust_hs400_calib_table; 87 bool needs_adjust_hs400; 88 89 /* Tuning values: 1 for success, 0 for failure */ 90 DECLARE_BITMAP(taps, BITS_PER_LONG); 91 /* Sampling data comparison: 1 for match, 0 for mismatch */ 92 DECLARE_BITMAP(smpcmp, BITS_PER_LONG); 93 unsigned int tap_num; 94 unsigned int tap_set; 95 96 struct reset_control *rstc; 97 struct tmio_mmc_host *host; 98 struct regulator_dev *rdev; 99 }; 100 101 #define host_to_priv(host) \ 102 container_of((host)->pdata, struct renesas_sdhi, mmc_data) 103 104 int renesas_sdhi_probe(struct platform_device *pdev, 105 const struct tmio_mmc_dma_ops *dma_ops, 106 const struct renesas_sdhi_of_data *of_data, 107 const struct renesas_sdhi_quirks *quirks); 108 void renesas_sdhi_remove(struct platform_device *pdev); 109 #endif 110