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>
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 5f6dfb8..c03529e 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));
}