mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 23:25:54 +00:00
5fb6bf51f6
When tuning HS400, if all TAPS are good, we can utilize the SMPCMP register to select the optimal TAP. For that, we populate a second bitmap with SMPCMP results and query it in case the regular bitmap is full (= all good). Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com> Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://lore.kernel.org/r/20200408094638.10375-4-wsa+renesas@sang-engineering.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/* 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) */
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
struct renesas_sdhi_quirks {
|
|
bool hs400_disabled;
|
|
bool hs400_4taps;
|
|
};
|
|
|
|
struct tmio_mmc_dma {
|
|
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 *clk_cd;
|
|
struct tmio_mmc_data mmc_data;
|
|
struct tmio_mmc_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;
|
|
bool doing_tune;
|
|
|
|
/* 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 long tap_set;
|
|
};
|
|
|
|
#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);
|
|
int renesas_sdhi_remove(struct platform_device *pdev);
|
|
#endif
|