On 22/09/23 04:49, Drew Fustini wrote: > Add support for the mmc controller in the T-Head TH1520 with the new > compatible "thead,th1520-dwcmshc". Implement custom sdhci_ops for > set_uhs_signaling, reset, voltage_switch, and platform_execute_tuning. > > Signed-off-by: Drew Fustini <dfustini@xxxxxxxxxxxx> > --- > drivers/mmc/host/sdhci-of-dwcmshc.c | 456 ++++++++++++++++++++++++++++++++++++ > 1 file changed, 456 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c > index 3a3bae6948a8..7294bf1afb7d 100644 > --- a/drivers/mmc/host/sdhci-of-dwcmshc.c > +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c > @@ -35,6 +35,26 @@ > #define DWCMSHC_CARD_IS_EMMC BIT(0) > #define DWCMSHC_ENHANCED_STROBE BIT(8) > #define DWCMSHC_EMMC_ATCTRL 0x40 > +/* Tuning and auto-tuning fields in AT_CTRL_R control register */ > +#define AT_CTRL_AT_EN 0x1 /* autotuning is enabled */ > +#define AT_CTRL_CI_SEL_SHIFT 0x1 /* bit 1 */ > +#define AT_CTRL_CI_SEL 0x1 /* interval to drive center phase select */ > +#define AT_CTRL_SWIN_TH_EN_SHIFT 0x2 /* bit 2 */ > +#define AT_CTRL_SWIN_TH_EN 0x1 /* sampling window threshold enable */ > +#define AT_CTRL_RPT_TUNE_ERR_SHIFT 0x3 /* bit 3 */ > +#define AT_CTRL_RPT_TUNE_ERR 0x1 /* enable reporting framing errors */ > +#define AT_CTRL_SW_TUNE_EN_SHIFT 0x4 /* bit 4 */ > +#define AT_CTRL_SW_TUNE_EN 0x1 /* enable software managed tuning */ > +#define AT_CTRL_WIN_EDGE_SEL_SHIFT 0x8 /* bits [11:8] */ > +#define AT_CTRL_WIN_EDGE_SEL 0xf /* sampling window edge select */ > +#define AT_CTRL_TUNE_CLK_STOP_EN_SHIFT 0x10 /* bit 16 */ > +#define AT_CTRL_TUNE_CLK_STOP_EN 0x1 /* clocks stopped during phase code change */ > +#define AT_CTRL_PRE_CHANGE_DLY_SHIFT 0x11 /* bits [18:17] */ > +#define AT_CTRL_PRE_CHANGE_DLY 0x1 /* 2-cycle latency */ > +#define AT_CTRL_POST_CHANGE_DLY_SHIFT 0x13 /* bits [20:19] */ > +#define AT_CTRL_POST_CHANGE_DLY 0x3 /* 4-cycle latency */ > +#define AT_CTRL_SWIN_TH_VAL_SHIFT 0x18 /* bits [31:24] */ > +#define AT_CTRL_SWIN_TH_VAL 0x9 /* sampling window threshold */ Here and elsewhere, please try to make use of BIT(), GENMASK(), FIELD_PREP(), FIELD_GET()
