[RFC PATCH v1 13/13] misc: rtsx: Use pci_disable/enable_link_state()

From: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
To: linux-pci@vger.kernel.org, "Bjorn Helgaas" <helgaas@kernel.org>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Rob Herring" <robh@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Lukas Wunner" <lukas@wunner.de>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	"Heiner Kallweit" <hkallweit1@gmail.com>,
	"Emmanuel Grumbach" <emmanuel.grumbach@intel.com>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Subject: [RFC PATCH v1 13/13] misc: rtsx: Use pci_disable/enable_link_state()
Date: Fri,  2 Jun 2023 14:47:50 +0300	[thread overview]
Message-ID: <20230602114751.19671-14-ilpo.jarvinen@linux.intel.com> (raw)
In-Reply-To: <20230602114751.19671-1-ilpo.jarvinen@linux.intel.com>

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@linux.intel.com>
---
 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 cfebad51d1d8..74a2651b5550 100644
--- a/drivers/misc/cardreader/rts5228.c
+++ b/drivers/misc/cardreader/rts5228.c
@@ -515,8 +515,7 @@ 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;
 }
 
@@ -527,8 +526,7 @@ 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 b1e76030cafd..03221db00b86 100644
--- a/drivers/misc/cardreader/rts5261.c
+++ b/drivers/misc/cardreader/rts5261.c
@@ -596,8 +596,7 @@ 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;
 }
 
@@ -609,8 +608,7 @@ 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 32b7783e9d4f..3c3edbb9c837 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

