drivers/mmc/host/renesas_sdhi.h

   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 };
  99
 100 #define host_to_priv(host) \
 101         container_of((host)->pdata, struct renesas_sdhi, mmc_data)
 102
 103 int renesas_sdhi_probe(struct platform_device *pdev,
 104                        const struct tmio_mmc_dma_ops *dma_ops,
 105                        const struct renesas_sdhi_of_data *of_data,
 106                        const struct renesas_sdhi_quirks *quirks);
 107 void renesas_sdhi_remove(struct platform_device *pdev);
 108 #endif