diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-11-19 14:13:57 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-12-17 08:26:24 +0100 |
| commit | 1970701f808095d28289c4add99a81be4ddd3790 (patch) | |
| tree | 2ca7b954bdb4baa3d7561425779d8c82e4534c31 /drivers/mmc/host | |
| parent | 0f4e2054c971c827dc9463ff14c7f8f90972eb52 (diff) | |
mmc: tmio: introduce mask for 'always 1' bits
Some variants (namely Renesas SDHI) have bits in the STATS and IRQ_MASK
registers which are 'always 1' and should be written as such. Introduce
a seperate mask for this and apply it whenever such a register is
written.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi_core.c | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.h | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index a049b01206f1..31a351a20dc0 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -722,6 +722,7 @@ int renesas_sdhi_probe(struct platform_device *pdev, host->ops.card_busy = renesas_sdhi_card_busy; host->ops.start_signal_voltage_switch = renesas_sdhi_start_signal_voltage_switch; + host->sdcard_irq_setbit_mask = TMIO_STAT_ALWAYS_SET_27; } /* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */ diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index 5f6dfb86e43e..c03529e3f01a 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -70,6 +70,7 @@ #define TMIO_STAT_DAT0 BIT(23) /* only known on R-Car so far */ #define TMIO_STAT_RXRDY BIT(24) #define TMIO_STAT_TXRQ BIT(25) +#define TMIO_STAT_ALWAYS_SET_27 BIT(27) /* only known on R-Car 2+ so far */ #define TMIO_STAT_ILL_FUNC BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */ #define TMIO_STAT_SCLKDIVEN BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */ #define TMIO_STAT_CMD_BUSY BIT(30) @@ -154,6 +155,7 @@ struct tmio_mmc_host { u32 sdcard_irq_mask; u32 sdio_irq_mask; unsigned int clk_cache; + u32 sdcard_irq_setbit_mask; spinlock_t lock; /* protect host private data */ unsigned long last_req_ts; @@ -268,6 +270,9 @@ static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int addr, u32 val) { + if (addr == CTL_IRQ_MASK || addr == CTL_STATUS) + val |= host->sdcard_irq_setbit_mask; + iowrite16(val & 0xffff, host->ctl + (addr << host->bus_shift)); iowrite16(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); } |