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/device.h> 13 #include <linux/dmaengine.h> 14 #include <linux/platform_device.h> 15 #include <linux/workqueue.h> 16 #include "tmio_mmc.h" 17 18 struct renesas_sdhi_scc { 19 unsigned long clk_rate; /* clock rate for SDR104 */ 20 u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */ 21 u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */ 22 }; 23 24 #define SDHI_FLAG_NEED_CLKH_FALLBACK BIT(0) 25 26 struct renesas_sdhi_of_data { 27 unsigned long tmio_flags; 28 u32 tmio_ocr_mask; 29 unsigned long capabilities; 30 unsigned long capabilities2; 31 enum dma_slave_buswidth dma_buswidth; 32 dma_addr_t dma_rx_offset; 33 unsigned int bus_shift; 34 int scc_offset; 35 struct renesas_sdhi_scc *taps; 36 int taps_num; 37 unsigned int max_blk_count; 38 unsigned short max_segs; 39 unsigned long sdhi_flags; 40 }; 41 42 #define SDHI_CALIB_TABLE_MAX 32 43 44 #define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q) 45 46 struct renesas_sdhi_quirks { 47 bool hs400_disabled; 48 bool hs400_4taps; 49 bool fixed_addr_mode; 50 bool dma_one_rx_only; 51 bool manual_tap_correction; 52 bool old_info1_layout; 53 u32 hs400_bad_taps; 54 const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX]; 55 }; 56 57 struct renesas_sdhi_of_data_with_quirks { 58 const struct renesas_sdhi_of_data *of_data; 59 const struct renesas_sdhi_quirks *quirks; 60 }; 61 62 /* We want both end_flags to be set before we mark DMA as finished */ 63 #define SDHI_DMA_END_FLAG_DMA 0 64 #define SDHI_DMA_END_FLAG_ACCESS 1 65 66 struct renesas_sdhi_dma { 67 unsigned long end_flags; 68 enum dma_slave_buswidth dma_buswidth; 69 dma_filter_fn filter; 70 void (*enable)(struct tmio_mmc_host *host, bool enable); 71 struct completion dma_dataend; 72 struct work_struct dma_complete; 73 }; 74 75 struct renesas_sdhi { 76 struct clk *clk; 77 struct clk *clkh; 78 struct clk *clk_cd; 79 struct tmio_mmc_data mmc_data; 80 struct renesas_sdhi_dma dma_priv; 81 const struct renesas_sdhi_quirks *quirks; 82 struct pinctrl *pinctrl; 83 struct pinctrl_state *pins_default, *pins_uhs; 84 void __iomem *scc_ctl; 85 u32 scc_tappos; 86 u32 scc_tappos_hs400; 87 const u8 *adjust_hs400_calib_table; 88 bool needs_adjust_hs400; 89 bool card_is_sdio; 90 91 /* Tuning values: 1 for success, 0 for failure */ 92 DECLARE_BITMAP(taps, BITS_PER_LONG); 93 /* Sampling data comparison: 1 for match, 0 for mismatch */ 94 DECLARE_BITMAP(smpcmp, BITS_PER_LONG); 95 unsigned int tap_num; 96 unsigned int tap_set; 97 98 struct reset_control *rstc; 99 struct tmio_mmc_host *host; 100 struct regulator_dev *rdev; 101 }; 102 103 #define host_to_priv(host) \ 104 container_of((host)->pdata, struct renesas_sdhi, mmc_data) 105 106 int renesas_sdhi_probe(struct platform_device *pdev, 107 const struct tmio_mmc_dma_ops *dma_ops, 108 const struct renesas_sdhi_of_data *of_data, 109 const struct renesas_sdhi_quirks *quirks); 110 void renesas_sdhi_remove(struct platform_device *pdev); 111 int renesas_sdhi_suspend(struct device *dev); 112 int renesas_sdhi_resume(struct device *dev); 113 #endif 114