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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2020-04-15 11:29:14 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-04-27 21:17:24 +0200 |
| commit | 2ecf39baba92bbe729f777ac27d9ebad3a17f65f (patch) | |
| tree | 7e5ab47e04b8c4c97eab2c59ae9f5cb764c80cf4 | |
| parent | ef7544a30304cf8cde50699b8bc2f40d10500bb1 (diff) | |
| download | barebox-2ecf39baba92bbe729f777ac27d9ebad3a17f65f.tar.gz barebox-2ecf39baba92bbe729f777ac27d9ebad3a17f65f.tar.xz | |
mci: sdhci: implement sdhci_reset()
SDHCI reset is common between many SDHCI variants. Add a library
function, so it can be reused.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | drivers/mci/sdhci.c | 11 | ||||
| -rw-r--r-- | drivers/mci/sdhci.h | 3 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mci/sdhci.c b/drivers/mci/sdhci.c index 172c8343a1..dba26b2665 100644 --- a/drivers/mci/sdhci.c +++ b/drivers/mci/sdhci.c @@ -138,3 +138,14 @@ int sdhci_transfer_data(struct sdhci *sdhci, struct mci_data *data) return 0; } + +int sdhci_reset(struct sdhci *sdhci, u8 mask) +{ + u8 val; + + sdhci_write8(sdhci, SDHCI_SOFTWARE_RESET, mask); + + return sdhci_read8_poll_timeout(sdhci, SDHCI_SOFTWARE_RESET, + val, !(val & mask), + 100 * USEC_PER_MSEC); +} diff --git a/drivers/mci/sdhci.h b/drivers/mci/sdhci.h index 8c250a4d89..ac7e155473 100644 --- a/drivers/mci/sdhci.h +++ b/drivers/mci/sdhci.h @@ -71,6 +71,8 @@ #define SDHCI_TIMEOUT_CONTROL 0x2e #define SDHCI_SOFTWARE_RESET 0x2f #define SDHCI_RESET_ALL BIT(0) +#define SDHCI_RESET_CMD BIT(1) +#define SDHCI_RESET_DATA BIT(2) #define SDHCI_INT_STATUS 0x30 #define SDHCI_INT_NORMAL_STATUS 0x30 #define SDHCI_INT_DATA_END_BIT BIT(22) @@ -146,6 +148,7 @@ void sdhci_set_cmd_xfer_mode(struct sdhci *host, struct mci_cmd *cmd, struct mci_data *data, bool dma, u32 *command, u32 *xfer); int sdhci_transfer_data(struct sdhci *sdhci, struct mci_data *data); +int sdhci_reset(struct sdhci *sdhci, u8 mask); #define sdhci_read8_poll_timeout(sdhci, reg, val, cond, timeout_us) \ read_poll_timeout(sdhci_read8, val, cond, timeout_us, sdhci, reg) |