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/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 struct renesas_sdhi_of_data {
  22         unsigned long tmio_flags;
  23         u32           tmio_ocr_mask;
  24         unsigned long capabilities;
  25         unsigned long capabilities2;
  26         enum dma_slave_buswidth dma_buswidth;
  27         dma_addr_t dma_rx_offset;
  28         unsigned int bus_shift;
  29         int scc_offset;
  30         struct renesas_sdhi_scc *taps;
  31         int taps_num;
  32         unsigned int max_blk_count;
  33         unsigned short max_segs;
  34 };
  35
  36 #define SDHI_CALIB_TABLE_MAX 32
  37
  38 struct renesas_sdhi_quirks {
  39         bool hs400_disabled;
  40         bool hs400_4taps;
  41         u32 hs400_bad_taps;
  42         const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX];
  43 };
  44
  45 struct tmio_mmc_dma {
  46         enum dma_slave_buswidth dma_buswidth;
  47         bool (*filter)(struct dma_chan *chan, void *arg);
  48         void (*enable)(struct tmio_mmc_host *host, bool enable);
  49         struct completion       dma_dataend;
  50         struct tasklet_struct   dma_complete;
  51 };
  52
  53 struct renesas_sdhi {
  54         struct clk *clk;
  55         struct clk *clk_cd;
  56         struct tmio_mmc_data mmc_data;
  57         struct tmio_mmc_dma dma_priv;
  58         const struct renesas_sdhi_quirks *quirks;
  59         struct pinctrl *pinctrl;
  60         struct pinctrl_state *pins_default, *pins_uhs;
  61         void __iomem *scc_ctl;
  62         u32 scc_tappos;
  63         u32 scc_tappos_hs400;
  64         const u8 *adjust_hs400_calib_table;
  65         bool needs_adjust_hs400;
  66
  67         /* Tuning values: 1 for success, 0 for failure */
  68         DECLARE_BITMAP(taps, BITS_PER_LONG);
  69         /* Sampling data comparison: 1 for match, 0 for mismatch */
  70         DECLARE_BITMAP(smpcmp, BITS_PER_LONG);
  71         unsigned int tap_num;
  72         unsigned int tap_set;
  73 };
  74
  75 #define host_to_priv(host) \
  76         container_of((host)->pdata, struct renesas_sdhi, mmc_data)
  77
  78 int renesas_sdhi_probe(struct platform_device *pdev,
  79                        const struct tmio_mmc_dma_ops *dma_ops);
  80 int renesas_sdhi_remove(struct platform_device *pdev);
  81 #endif