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| author | Rui Feng <rui_feng@realsil.com.cn> | 2020-10-29 02:57:48 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-11-16 11:59:28 +0100 |
| commit | 5afe802132f242f5520d2acac09ea05d31e3c7cf (patch) | |
| tree | cdcf4af682254aee57971e5b2a791c2569e59937 /drivers/misc/cardreader/rts5261.c | |
| parent | mmc: core: Initial support for SD express card/host (diff) | |
| download | linux-5afe802132f242f5520d2acac09ea05d31e3c7cf.tar.xz linux-5afe802132f242f5520d2acac09ea05d31e3c7cf.zip | |
misc: rtsx: Add SD Express mode support for RTS5261
RTS5261 support SD mode and PCIe/NVMe mode. The workflow is as follows.
1.RTS5261 work in SD mode and set MMC_CAPS2_SD_EXP flag.
2.If card is plugged in, Host send CMD8 to ask card's PCIe availability.
3.If the card has PCIe availability and WP is not set, init_sd_express() will be invoked,
RTS5261 switch to PCIe/NVMe mode.
4.Mmc driver handover it to NVMe driver.
5.If card is unplugged, RTS5261 will switch to SD mode.
Signed-off-by: Rui Feng <rui_feng@realsil.com.cn>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/1603936668-3363-1-git-send-email-rui_feng@realsil.com.cn
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/misc/cardreader/rts5261.c')
| -rw-r--r-- | drivers/misc/cardreader/rts5261.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c index 471961487ff8..536c90d4fd76 100644 --- a/drivers/misc/cardreader/rts5261.c +++ b/drivers/misc/cardreader/rts5261.c @@ -738,8 +738,12 @@ void rts5261_init_params(struct rtsx_pcr *pcr) { struct rtsx_cr_option *option = &pcr->option; struct rtsx_hw_param *hw_param = &pcr->hw_param; + u8 val; pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104; + rtsx_pci_read_register(pcr, RTS5261_FW_STATUS, &val); + if (!(val & RTS5261_EXPRESS_LINK_FAIL_MASK)) + pcr->extra_caps |= EXTRA_CAPS_SD_EXPRESS; pcr->num_slots = 1; pcr->ops = &rts5261_pcr_ops; |