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| author | Rui Feng <rui_feng@realsil.com.cn> | 2020-10-29 09:57:48 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-11-16 11:59:28 +0100 |
| commit | 5afe802132f242f5520d2acac09ea05d31e3c7cf (patch) | |
| tree | cdcf4af682254aee57971e5b2a791c2569e59937 /drivers/misc/cardreader/rtsx_pcr.c | |
| parent | ead49373d2916080509f51fc6a4ee8f9bc021b9b (diff) | |
| download | lwn-5afe802132f242f5520d2acac09ea05d31e3c7cf.tar.gz lwn-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/rtsx_pcr.c')
| -rw-r--r-- | drivers/misc/cardreader/rtsx_pcr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c index 5d15607027e9..56f63fa7f646 100644 --- a/drivers/misc/cardreader/rtsx_pcr.c +++ b/drivers/misc/cardreader/rtsx_pcr.c @@ -990,6 +990,11 @@ static irqreturn_t rtsx_pci_isr(int irq, void *dev_id) } else { pcr->card_removed |= SD_EXIST; pcr->card_inserted &= ~SD_EXIST; + if (PCI_PID(pcr) == PID_5261) { + rtsx_pci_write_register(pcr, RTS5261_FW_STATUS, + RTS5261_EXPRESS_LINK_FAIL_MASK, 0); + pcr->extra_caps |= EXTRA_CAPS_SD_EXPRESS; + } } pcr->dma_error_count = 0; } |