[PATCH v2 13/13] misc: rtsx: Use pci_disable/enable_link_state()

From: Ilpo Järvinen
Date: Mon Sep 18 2023 - 12:32:32 EST


rtsx driver adjusts ASPM state itself which leaves ASPM service
driver in PCI core unaware of the link state changes the driver
implemented.

Call pci_disable_link_state() and pci_enable_link_state() instead of
adjusting ASPMC field in LNKCTL directly in the driver and let PCI core
handle the ASPM state management.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
drivers/misc/cardreader/rts5228.c | 6 ++----
drivers/misc/cardreader/rts5261.c | 6 ++----
drivers/misc/cardreader/rtsx_pcr.c | 8 +++++---
3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/misc/cardreader/rts5228.c b/drivers/misc/cardreader/rts5228.c
index f4ab09439da7..8d3216c64ad1 100644
--- a/drivers/misc/cardreader/rts5228.c
+++ b/drivers/misc/cardreader/rts5228.c
@@ -497,8 +497,7 @@ static void rts5228_enable_aspm(struct rtsx_pcr *pcr, bool enable)
val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
val |= (pcr->aspm_en & 0x02);
rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
- pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
+ pci_enable_link_state(pcr->pci, pcr->aspm_en);
pcr->aspm_enabled = enable;
}

@@ -509,8 +508,7 @@ static void rts5228_disable_aspm(struct rtsx_pcr *pcr, bool enable)
if (pcr->aspm_enabled == enable)
return;

- pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_ASPMC, 0);
+ pci_disable_link_state(pcr->pci, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
index 94af6bf8a25a..f1ef15683a2f 100644
--- a/drivers/misc/cardreader/rts5261.c
+++ b/drivers/misc/cardreader/rts5261.c
@@ -578,8 +578,7 @@ static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)

val |= (pcr->aspm_en & 0x02);
rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
- pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
+ pci_enable_link_state(pcr->pci, pcr->aspm_en);
pcr->aspm_enabled = enable;
}

@@ -591,8 +590,7 @@ static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
if (pcr->aspm_enabled == enable)
return;

- pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_ASPMC, 0);
+ pci_disable_link_state(pcr->pci, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1);
rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
udelay(10);
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index a3f4b52bb159..6efb792152f2 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -86,9 +86,11 @@ static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
return;

if (pcr->aspm_mode == ASPM_MODE_CFG) {
- pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
- PCI_EXP_LNKCTL_ASPMC,
- enable ? pcr->aspm_en : 0);
+ if (enable)
+ pci_enable_link_state(pcr->pci, pcr->aspm_en);
+ else
+ pci_disable_link_state(pcr->pci, PCIE_LINK_STATE_L0S |
+ PCIE_LINK_STATE_L1);
} else if (pcr->aspm_mode == ASPM_MODE_REG) {
if (pcr->aspm_en & 0x02)
rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, FORCE_ASPM_CTL0 |
--
2.30.2