[PATCH 0/6] misc: rtsx: Clean up Realtek card reader driver

[PATCH 0/6] misc: rtsx: Clean up Realtek card reader driver

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

These are minor cleanups of the Realtek card reader driver.  They shouldn't
fix or break anything by themselves; they're just to make it slightly more
readable and maintainable.

Bjorn Helgaas (6):
  misc: rtsx: Remove unused pcr_ops
  misc: rtsx: Removed unused dev_aspm_mode
  misc: rtsx: Use ASPM_MASK_NEG instead of hard-coded value
  misc: rtsx: Use pcie_capability_clear_and_set_word() for
    PCI_EXP_LNKCTL
  misc: rtsx: Simplify rtsx_comm_set_aspm()
  misc: rtsx: Remove unnecessary rts5249_set_aspm(), rts5260_set_aspm()

 drivers/misc/cardreader/rts5249.c  | 29 --------------------
 drivers/misc/cardreader/rts5260.c  | 26 ------------------
 drivers/misc/cardreader/rts5261.c  | 38 +++-----------------------
 drivers/misc/cardreader/rtsx_pcr.c | 43 ++++++------------------------
 drivers/misc/cardreader/rtsx_pcr.h |  1 -
 include/linux/rtsx_pci.h           | 25 -----------------
 6 files changed, 12 insertions(+), 150 deletions(-)


base-commit: 8f3d9f354286745c751374f5f1fcafee6b3f3136
-- 
2.25.1

[PATCH 1/6] misc: rtsx: Remove unused pcr_ops

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Remove the following unused function pointers from struct pcr_ops:

  int (*set_ltr_latency)(struct rtsx_pcr *pcr, u32 latency);
  int (*set_l1off_sub)(struct rtsx_pcr *pcr, u8 val);
  void (*full_on)(struct rtsx_pcr *pcr);
  void (*power_saving)(struct rtsx_pcr *pcr);

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/misc/cardreader/rtsx_pcr.c | 15 +++------------
 include/linux/rtsx_pci.h           |  4 ----
 2 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index 06038b325b02..7145de2504c2 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -85,10 +85,7 @@ static int rtsx_comm_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
 
 int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
 {
-	if (pcr->ops->set_ltr_latency)
-		return pcr->ops->set_ltr_latency(pcr, latency);
-	else
-		return rtsx_comm_set_ltr_latency(pcr, latency);
+	return rtsx_comm_set_ltr_latency(pcr, latency);
 }
 
 static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
@@ -151,10 +148,7 @@ static void rtsx_comm_pm_full_on(struct rtsx_pcr *pcr)
 
 static void rtsx_pm_full_on(struct rtsx_pcr *pcr)
 {
-	if (pcr->ops->full_on)
-		pcr->ops->full_on(pcr);
-	else
-		rtsx_comm_pm_full_on(pcr);
+	rtsx_comm_pm_full_on(pcr);
 }
 
 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
@@ -1108,10 +1102,7 @@ static void rtsx_comm_pm_power_saving(struct rtsx_pcr *pcr)
 
 static void rtsx_pm_power_saving(struct rtsx_pcr *pcr)
 {
-	if (pcr->ops->power_saving)
-		pcr->ops->power_saving(pcr);
-	else
-		rtsx_comm_pm_power_saving(pcr);
+	rtsx_comm_pm_power_saving(pcr);
 }
 
 static void rtsx_pci_idle_work(struct work_struct *work)
diff --git a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h
index 65b8142a7fed..df86afb2b4fe 100644
--- a/include/linux/rtsx_pci.h
+++ b/include/linux/rtsx_pci.h
@@ -1080,11 +1080,7 @@ struct pcr_ops {
 	void		(*stop_cmd)(struct rtsx_pcr *pcr);
 
 	void (*set_aspm)(struct rtsx_pcr *pcr, bool enable);
-	int (*set_ltr_latency)(struct rtsx_pcr *pcr, u32 latency);
-	int (*set_l1off_sub)(struct rtsx_pcr *pcr, u8 val);
 	void (*set_l1off_cfg_sub_d0)(struct rtsx_pcr *pcr, int active);
-	void (*full_on)(struct rtsx_pcr *pcr);
-	void (*power_saving)(struct rtsx_pcr *pcr);
 	void (*enable_ocp)(struct rtsx_pcr *pcr);
 	void (*disable_ocp)(struct rtsx_pcr *pcr);
 	void (*init_ocp)(struct rtsx_pcr *pcr);
-- 
2.25.1

[PATCH 2/6] misc: rtsx: Removed unused dev_aspm_mode

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

The struct rtsx_cr_option.dev_aspm_mode member is never set to anything
other than DEV_ASPM_DYNAMIC (0).  Remove it and code that tests it.  No
functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/misc/cardreader/rts5249.c  | 19 ++++------------
 drivers/misc/cardreader/rts5260.c  | 18 ++++-----------
 drivers/misc/cardreader/rts5261.c  | 36 +++++-------------------------
 drivers/misc/cardreader/rtsx_pcr.c | 19 ++++------------
 include/linux/rtsx_pci.h           |  9 --------
 5 files changed, 18 insertions(+), 83 deletions(-)

diff --git a/drivers/misc/cardreader/rts5249.c b/drivers/misc/cardreader/rts5249.c
index 1a81cda948c1..5171fdd92f3c 100644
--- a/drivers/misc/cardreader/rts5249.c
+++ b/drivers/misc/cardreader/rts5249.c
@@ -349,25 +349,15 @@ static int rtsx_base_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 
 static void rts5249_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		if (enable)
-			val = pcr->aspm_en;
-		rtsx_pci_update_cfg_byte(pcr,
-			pcr->pcie_cap + PCI_EXP_LNKCTL,
-			ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		if (!enable)
-			val = FORCE_ASPM_CTL0;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-	}
+	if (enable)
+		val = pcr->aspm_en;
+	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
+				 ASPM_MASK_NEG, val);
 
 	pcr->aspm_enabled = enable;
 }
@@ -471,7 +461,6 @@ void rts5249_init_params(struct rtsx_pcr *pcr)
 	option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
 	option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
 	option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
-	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 	option->ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5249_DEF;
 	option->ltr_l1off_snooze_sspwrgate =
diff --git a/drivers/misc/cardreader/rts5260.c b/drivers/misc/cardreader/rts5260.c
index 711054ebad74..b4c1386382ea 100644
--- a/drivers/misc/cardreader/rts5260.c
+++ b/drivers/misc/cardreader/rts5260.c
@@ -572,24 +572,15 @@ static int rts5260_extra_init_hw(struct rtsx_pcr *pcr)
 
 static void rts5260_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		if (enable)
-			val = pcr->aspm_en;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		if (!enable)
-			val = FORCE_ASPM_CTL0;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-	}
+	if (enable)
+		val = pcr->aspm_en;
+	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
+				 ASPM_MASK_NEG, val);
 
 	pcr->aspm_enabled = enable;
 }
@@ -683,7 +674,6 @@ void rts5260_init_params(struct rtsx_pcr *pcr)
 	option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
 	option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
 	option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
-	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 	option->ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEF;
 	option->ltr_l1off_snooze_sspwrgate =
diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
index 78c3b1d424c3..807ffbd9c06d 100644
--- a/drivers/misc/cardreader/rts5261.c
+++ b/drivers/misc/cardreader/rts5261.c
@@ -518,51 +518,28 @@ static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
 
 static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		val = pcr->aspm_en;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		val = FORCE_ASPM_CTL0;
-		val |= (pcr->aspm_en & 0x02);
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-		val = pcr->aspm_en;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-	}
+	val = pcr->aspm_en;
+	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
+				 ASPM_MASK_NEG, val);
 	pcr->aspm_enabled = enable;
 
 }
 
 static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		val = 0;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		val = 0;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-		val = FORCE_ASPM_CTL0;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-	}
+	val = 0;
+	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
+				 ASPM_MASK_NEG, val);
 	rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
 	udelay(10);
 	pcr->aspm_enabled = enable;
@@ -784,7 +761,6 @@ void rts5261_init_params(struct rtsx_pcr *pcr)
 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 	option->ltr_l1off_sspwrgate = 0x7F;
 	option->ltr_l1off_snooze_sspwrgate = 0x78;
-	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
 
 	option->ocp_en = 1;
 	hw_param->interrupt_en |= SD_OC_INT_EN;
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index 7145de2504c2..ce3919e59719 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -90,24 +90,13 @@ int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
 
 static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
-
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		if (enable)
-			rtsx_pci_enable_aspm(pcr);
-		else
-			rtsx_pci_disable_aspm(pcr);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK;
-		u8 val = 0;
-
-		if (enable)
-			val = pcr->aspm_en;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL,  mask, val);
-	}
+	if (enable)
+		rtsx_pci_enable_aspm(pcr);
+	else
+		rtsx_pci_disable_aspm(pcr);
 
 	pcr->aspm_enabled = enable;
 }
diff --git a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h
index df86afb2b4fe..a75132a0cf8f 100644
--- a/include/linux/rtsx_pci.h
+++ b/include/linux/rtsx_pci.h
@@ -1104,13 +1104,6 @@ enum PDEV_STAT  {PDEV_STAT_IDLE, PDEV_STAT_RUN};
 #define L1_SNOOZE_TEST_EN		BIT(5)
 #define LTR_L1SS_PWR_GATE_CHECK_CARD_EN	BIT(6)
 
-enum dev_aspm_mode {
-	DEV_ASPM_DYNAMIC,
-	DEV_ASPM_BACKDOOR,
-	DEV_ASPM_STATIC,
-	DEV_ASPM_DISABLE,
-};
-
 /*
  * struct rtsx_cr_option  - card reader option
  * @dev_flags: device flags
@@ -1121,7 +1114,6 @@ enum dev_aspm_mode {
  * @ltr_active_latency: ltr mode active latency
  * @ltr_idle_latency: ltr mode idle latency
  * @ltr_l1off_latency: ltr mode l1off latency
- * @dev_aspm_mode: device aspm mode
  * @l1_snooze_delay: l1 snooze delay
  * @ltr_l1off_sspwrgate: ltr l1off sspwrgate
  * @ltr_l1off_snooze_sspwrgate: ltr l1off snooze sspwrgate
@@ -1138,7 +1130,6 @@ struct rtsx_cr_option {
 	u32 ltr_active_latency;
 	u32 ltr_idle_latency;
 	u32 ltr_l1off_latency;
-	enum dev_aspm_mode dev_aspm_mode;
 	u32 l1_snooze_delay;
 	u8 ltr_l1off_sspwrgate;
 	u8 ltr_l1off_snooze_sspwrgate;
-- 
2.25.1

[PATCH 3/6] misc: rtsx: Use ASPM_MASK_NEG instead of hard-coded value

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Use ASPM_MASK_NEG instead of hard-coded value, as other callers of
rtsx_pci_update_cfg_byte() do.  No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/misc/cardreader/rtsx_pcr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index ce3919e59719..afde5499bfb6 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -58,13 +58,13 @@ MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
 static inline void rtsx_pci_enable_aspm(struct rtsx_pcr *pcr)
 {
 	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-		0xFC, pcr->aspm_en);
+		ASPM_MASK_NEG, pcr->aspm_en);
 }
 
 static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
 {
 	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-		0xFC, 0);
+		ASPM_MASK_NEG, 0);
 }
 
 static int rtsx_comm_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
-- 
2.25.1

[PATCH 4/6] misc: rtsx: Use pcie_capability_clear_and_set_word() for PCI_EXP_LNKCTL

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Instead of using the driver-specific rtsx_pci_update_cfg_byte() to update
the PCIe Link Control Register, use pcie_capability_clear_and_set_word()
like the rest of the kernel does.  This makes it easier to maintain ASPM
across the PCI core and drivers.

Remove the now-unused rtsx_pci_update_cfg_byte() and ASPM_MASK_NEG
definitions.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/misc/cardreader/rts5249.c  |  9 +++------
 drivers/misc/cardreader/rts5260.c  |  9 +++------
 drivers/misc/cardreader/rts5261.c  | 14 ++++----------
 drivers/misc/cardreader/rtsx_pcr.c |  8 ++++----
 drivers/misc/cardreader/rtsx_pcr.h |  1 -
 include/linux/rtsx_pci.h           | 12 ------------
 6 files changed, 14 insertions(+), 39 deletions(-)

diff --git a/drivers/misc/cardreader/rts5249.c b/drivers/misc/cardreader/rts5249.c
index 5171fdd92f3c..d122608e9f79 100644
--- a/drivers/misc/cardreader/rts5249.c
+++ b/drivers/misc/cardreader/rts5249.c
@@ -349,15 +349,12 @@ static int rtsx_base_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 
 static void rts5249_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	u8 val = 0;
-
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (enable)
-		val = pcr->aspm_en;
-	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-				 ASPM_MASK_NEG, val);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC,
+					   enable ? pcr->aspm_en : 0);
 
 	pcr->aspm_enabled = enable;
 }
diff --git a/drivers/misc/cardreader/rts5260.c b/drivers/misc/cardreader/rts5260.c
index b4c1386382ea..75fc67d78d7f 100644
--- a/drivers/misc/cardreader/rts5260.c
+++ b/drivers/misc/cardreader/rts5260.c
@@ -572,15 +572,12 @@ static int rts5260_extra_init_hw(struct rtsx_pcr *pcr)
 
 static void rts5260_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	u8 val = 0;
-
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (enable)
-		val = pcr->aspm_en;
-	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-				 ASPM_MASK_NEG, val);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC,
+					   enable ?  pcr->aspm : 0);
 
 	pcr->aspm_enabled = enable;
 }
diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
index 807ffbd9c06d..5bf59957b31e 100644
--- a/drivers/misc/cardreader/rts5261.c
+++ b/drivers/misc/cardreader/rts5261.c
@@ -518,28 +518,22 @@ static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
 
 static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	u8 val = 0;
-
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	val = pcr->aspm_en;
-	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-				 ASPM_MASK_NEG, val);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
 	pcr->aspm_enabled = enable;
 
 }
 
 static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	u8 val = 0;
-
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	val = 0;
-	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-				 ASPM_MASK_NEG, val);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC, 0);
 	rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
 	udelay(10);
 	pcr->aspm_enabled = enable;
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index afde5499bfb6..a8ce9c3744be 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -57,14 +57,14 @@ MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
 
 static inline void rtsx_pci_enable_aspm(struct rtsx_pcr *pcr)
 {
-	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-		ASPM_MASK_NEG, pcr->aspm_en);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
 }
 
 static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
 {
-	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-		ASPM_MASK_NEG, 0);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC, 0);
 }
 
 static int rtsx_comm_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
diff --git a/drivers/misc/cardreader/rtsx_pcr.h b/drivers/misc/cardreader/rtsx_pcr.h
index ed391df52f4f..024cbd998b2a 100644
--- a/drivers/misc/cardreader/rtsx_pcr.h
+++ b/drivers/misc/cardreader/rtsx_pcr.h
@@ -29,7 +29,6 @@
 #define LTR_L1OFF_SNOOZE_SSPWRGATE_5249_DEF	0xAC
 #define LTR_L1OFF_SNOOZE_SSPWRGATE_5250_DEF	0xF8
 #define CMD_TIMEOUT_DEF		100
-#define ASPM_MASK_NEG		0xFC
 #define MASK_8_BIT_DEF		0xFF
 
 #define SSC_CLOCK_STABLE_WAIT	130
diff --git a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h
index a75132a0cf8f..e8780d4e4636 100644
--- a/include/linux/rtsx_pci.h
+++ b/include/linux/rtsx_pci.h
@@ -1307,18 +1307,6 @@ static inline u8 *rtsx_pci_get_cmd_data(struct rtsx_pcr *pcr)
 	return (u8 *)(pcr->host_cmds_ptr);
 }
 
-static inline int rtsx_pci_update_cfg_byte(struct rtsx_pcr *pcr, int addr,
-		u8 mask, u8 append)
-{
-	int err;
-	u8 val;
-
-	err = pci_read_config_byte(pcr->pci, addr, &val);
-	if (err < 0)
-		return err;
-	return pci_write_config_byte(pcr->pci, addr, (val & mask) | append);
-}
-
 static inline void rtsx_pci_write_be32(struct rtsx_pcr *pcr, u16 reg, u32 val)
 {
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg,     0xFF, val >> 24);
-- 
2.25.1

[PATCH 5/6] misc: rtsx: Simplify rtsx_comm_set_aspm()

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

Simplify rtsx_comm_set_aspm() and remove the now-unused
rtsx_pci_enable_aspm().

rtsx_pci_disable_aspm() is still used by rtsx_pci_init_hw().

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/misc/cardreader/rtsx_pcr.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
index a8ce9c3744be..aea4b5d85e9c 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -55,12 +55,6 @@ static const struct pci_device_id rtsx_pci_ids[] = {
 
 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
 
-static inline void rtsx_pci_enable_aspm(struct rtsx_pcr *pcr)
-{
-	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
-					   PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
-}
-
 static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
 {
 	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
@@ -93,10 +87,9 @@ static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (enable)
-		rtsx_pci_enable_aspm(pcr);
-	else
-		rtsx_pci_disable_aspm(pcr);
+	pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
+					   PCI_EXP_LNKCTL_ASPMC,
+					   enable ? pcr->aspm_en : 0);
 
 	pcr->aspm_enabled = enable;
 }
-- 
2.25.1

[PATCH 6/6] misc: rtsx: Remove unnecessary rts5249_set_aspm(), rts5260_set_aspm()

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas@google.com>

rts5249_set_aspm() and rts5260_set_aspm() do nothing more than the default
rtsx_comm_set_aspm() does, so remove them and use the default.  No
functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/misc/cardreader/rts5249.c | 15 ---------------
 drivers/misc/cardreader/rts5260.c | 13 -------------
 2 files changed, 28 deletions(-)

diff --git a/drivers/misc/cardreader/rts5249.c b/drivers/misc/cardreader/rts5249.c
index d122608e9f79..6c6c9e95a29f 100644
--- a/drivers/misc/cardreader/rts5249.c
+++ b/drivers/misc/cardreader/rts5249.c
@@ -347,18 +347,6 @@ static int rtsx_base_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 	return rtsx_pci_send_cmd(pcr, 100);
 }
 
-static void rts5249_set_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,
-					   enable ? pcr->aspm_en : 0);
-
-	pcr->aspm_enabled = enable;
-}
-
 static const struct pcr_ops rts5249_pcr_ops = {
 	.fetch_vendor_settings = rtsx_base_fetch_vendor_settings,
 	.extra_init_hw = rts5249_extra_init_hw,
@@ -371,7 +359,6 @@ static const struct pcr_ops rts5249_pcr_ops = {
 	.card_power_off = rtsx_base_card_power_off,
 	.switch_output_voltage = rtsx_base_switch_output_voltage,
 	.force_power_down = rtsx_base_force_power_down,
-	.set_aspm = rts5249_set_aspm,
 };
 
 /* SD Pull Control Enable:
@@ -598,7 +585,6 @@ static const struct pcr_ops rts524a_pcr_ops = {
 	.switch_output_voltage = rtsx_base_switch_output_voltage,
 	.force_power_down = rtsx_base_force_power_down,
 	.set_l1off_cfg_sub_d0 = rts5250_set_l1off_cfg_sub_d0,
-	.set_aspm = rts5249_set_aspm,
 };
 
 void rts524a_init_params(struct rtsx_pcr *pcr)
@@ -714,7 +700,6 @@ static const struct pcr_ops rts525a_pcr_ops = {
 	.switch_output_voltage = rts525a_switch_output_voltage,
 	.force_power_down = rtsx_base_force_power_down,
 	.set_l1off_cfg_sub_d0 = rts5250_set_l1off_cfg_sub_d0,
-	.set_aspm = rts5249_set_aspm,
 };
 
 void rts525a_init_params(struct rtsx_pcr *pcr)
diff --git a/drivers/misc/cardreader/rts5260.c b/drivers/misc/cardreader/rts5260.c
index 75fc67d78d7f..7a9dbb778e84 100644
--- a/drivers/misc/cardreader/rts5260.c
+++ b/drivers/misc/cardreader/rts5260.c
@@ -570,18 +570,6 @@ static int rts5260_extra_init_hw(struct rtsx_pcr *pcr)
 	return 0;
 }
 
-static void rts5260_set_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,
-					   enable ?  pcr->aspm : 0);
-
-	pcr->aspm_enabled = enable;
-}
-
 static void rts5260_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
 {
 	struct rtsx_cr_option *option = &pcr->option;
@@ -627,7 +615,6 @@ static const struct pcr_ops rts5260_pcr_ops = {
 	.switch_output_voltage = rts5260_switch_output_voltage,
 	.force_power_down = rtsx_base_force_power_down,
 	.stop_cmd = rts5260_stop_cmd,
-	.set_aspm = rts5260_set_aspm,
 	.set_l1off_cfg_sub_d0 = rts5260_set_l1off_cfg_sub_d0,
 	.enable_ocp = rts5260_enable_ocp,
 	.disable_ocp = rts5260_disable_ocp,
-- 
2.25.1

Re: [PATCH 0/6] misc: rtsx: Clean up Realtek card reader driver

[Greg Kroah-Hartman]

On Thu, May 21, 2020 at 01:05:39PM -0500, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
> 
> These are minor cleanups of the Realtek card reader driver.  They shouldn't
> fix or break anything by themselves; they're just to make it slightly more
> readable and maintainable.

Thanks for these, they all look sane and I've queued them up in my tree
now.

greg k-h