diff options
Diffstat (limited to 'drivers/mmc/host/renesas_sdhi.h')
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h new file mode 100644 index 0000000000..c1fb9740ea --- /dev/null +++ b/drivers/mmc/host/renesas_sdhi.h @@ -0,0 +1,105 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Renesas Mobile SDHI + * + * Copyright (C) 2017 Horms Solutions Ltd., Simon Horman + * Copyright (C) 2017-19 Renesas Electronics Corporation + */ + +#ifndef RENESAS_SDHI_H +#define RENESAS_SDHI_H + +#include <linux/platform_device.h> +#include "tmio_mmc.h" + +struct renesas_sdhi_scc { + unsigned long clk_rate; /* clock rate for SDR104 */ + u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */ + u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */ +}; + +#define SDHI_FLAG_NEED_CLKH_FALLBACK BIT(0) + +struct renesas_sdhi_of_data { + unsigned long tmio_flags; + u32 tmio_ocr_mask; + unsigned long capabilities; + unsigned long capabilities2; + enum dma_slave_buswidth dma_buswidth; + dma_addr_t dma_rx_offset; + unsigned int bus_shift; + int scc_offset; + struct renesas_sdhi_scc *taps; + int taps_num; + unsigned int max_blk_count; + unsigned short max_segs; + unsigned long sdhi_flags; +}; + +#define SDHI_CALIB_TABLE_MAX 32 + +#define sdhi_has_quirk(p, q) ((p)->quirks && (p)->quirks->q) + +struct renesas_sdhi_quirks { + bool hs400_disabled; + bool hs400_4taps; + bool fixed_addr_mode; + bool dma_one_rx_only; + bool manual_tap_correction; + bool old_info1_layout; + u32 hs400_bad_taps; + const u8 (*hs400_calib_table)[SDHI_CALIB_TABLE_MAX]; +}; + +struct renesas_sdhi_of_data_with_quirks { + const struct renesas_sdhi_of_data *of_data; + const struct renesas_sdhi_quirks *quirks; +}; + +/* We want both end_flags to be set before we mark DMA as finished */ +#define SDHI_DMA_END_FLAG_DMA 0 +#define SDHI_DMA_END_FLAG_ACCESS 1 + +struct renesas_sdhi_dma { + unsigned long end_flags; + enum dma_slave_buswidth dma_buswidth; + bool (*filter)(struct dma_chan *chan, void *arg); + void (*enable)(struct tmio_mmc_host *host, bool enable); + struct completion dma_dataend; + struct tasklet_struct dma_complete; +}; + +struct renesas_sdhi { + struct clk *clk; + struct clk *clkh; + struct clk *clk_cd; + struct tmio_mmc_data mmc_data; + struct renesas_sdhi_dma dma_priv; + const struct renesas_sdhi_quirks *quirks; + struct pinctrl *pinctrl; + struct pinctrl_state *pins_default, *pins_uhs; + void __iomem *scc_ctl; + u32 scc_tappos; + u32 scc_tappos_hs400; + const u8 *adjust_hs400_calib_table; + bool needs_adjust_hs400; + + /* Tuning values: 1 for success, 0 for failure */ + DECLARE_BITMAP(taps, BITS_PER_LONG); + /* Sampling data comparison: 1 for match, 0 for mismatch */ + DECLARE_BITMAP(smpcmp, BITS_PER_LONG); + unsigned int tap_num; + unsigned int tap_set; + + struct reset_control *rstc; +}; + +#define host_to_priv(host) \ + container_of((host)->pdata, struct renesas_sdhi, mmc_data) + +int renesas_sdhi_probe(struct platform_device *pdev, + const struct tmio_mmc_dma_ops *dma_ops, + const struct renesas_sdhi_of_data *of_data, + const struct renesas_sdhi_quirks *quirks); +void renesas_sdhi_remove(struct platform_device *pdev); +#endif |