[PATCH 1/2] phy: usb: Turn off phy when port is in suspend

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* [PATCH 1/2] phy: usb: Turn off phy when port is in suspend
       [not found] <1686859578-45242-1-git-send-email-justin.chen@broadcom.com>
@ 2023-06-15 20:06 ` Justin Chen
  2023-06-15 20:06 ` [PATCH 2/2] phy: usb: suppress OC condition for 7439b2 Justin Chen
  1 sibling, 0 replies; 3+ messages in thread
From: Justin Chen @ 2023-06-15 20:06 UTC (permalink / raw)
  To: linux-phy
  Cc: bcm-kernel-feedback-list, florian.fainelli, Justin Chen,
	Justin Chen, Al Cooper, Vinod Koul, Kishon Vijay Abraham I,
	open list:BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER

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The COMMONONN bit turns off the PHY when the host controller puts it
into suspend state. This can happen during the following...
- Nothing is connected to the port
- The host controller goes into low power mode whatever due to auto
  suspend or system suspend.

With COMMONONN we also must unset U2_FREECLK_EXISTS since the UTMI
clock is fed by the PHY.

With these changes we see a power savings of ~12mW when port is in
suspend.

Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Justin Chen <justin.chen@broadcom.com>
---
 drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c | 15 +++++++++++++--
 drivers/phy/broadcom/phy-brcm-usb-init.h          |  8 ++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
index 76cf4280d7ed..4c10cafded4e 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
+++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c
@@ -59,6 +59,8 @@
 #define   USB_CTLR_TP_DIAG1_wake_MASK			BIT(1)
 #define USB_CTRL_CTLR_CSHCR		0x50
 #define   USB_CTRL_CTLR_CSHCR_ctl_pme_en_MASK		BIT(18)
+#define USB_CTRL_P0_U2PHY_CFG1		0x68
+#define   USB_CTRL_P0_U2PHY_CFG1_COMMONONN_MASK		BIT(10)
 
 /* Register definitions for the USB_PHY block in 7211b0 */
 #define USB_PHY_PLL_CTL			0x00
@@ -90,6 +92,8 @@
 #define   BDC_EC_AXIRDA_RTS_MASK			GENMASK(31, 28)
 #define   BDC_EC_AXIRDA_RTS_SHIFT			28
 
+#define USB_XHCI_GBL_GUSB2PHYCFG	0x100
+#define   USB_XHCI_GBL_GUSB2PHYCFG_U2_FREECLK_EXISTS_MASK	BIT(30)
 
 static void usb_mdio_write_7211b0(struct brcm_usb_init_params *params,
 				  uint8_t addr, uint16_t data)
@@ -140,13 +144,17 @@ static void xhci_soft_reset(struct brcm_usb_init_params *params,
 			int on_off)
 {
 	void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
+	void __iomem *xhci_gbl = params->regs[BRCM_REGS_XHCI_GBL];
 
 	/* Assert reset */
-	if (on_off)
+	if (on_off) {
 		USB_CTRL_UNSET(ctrl, USB_PM, XHC_SOFT_RESETB);
 	/* De-assert reset */
-	else
+	} else {
 		USB_CTRL_SET(ctrl, USB_PM, XHC_SOFT_RESETB);
+		/* Required for COMMONONN to be set */
+		USB_XHCI_GBL_UNSET(xhci_gbl, GUSB2PHYCFG, U2_FREECLK_EXISTS);
+	}
 }
 
 static void usb_init_ipp(struct brcm_usb_init_params *params)
@@ -320,6 +328,9 @@ static void usb_init_common_7216(struct brcm_usb_init_params *params)
 	/* 1 millisecond - for USB clocks to settle down */
 	usleep_range(1000, 2000);
 
+	/* Disable PHY when port is suspended */
+	USB_CTRL_SET(ctrl, P0_U2PHY_CFG1, COMMONONN);
+
 	usb_wake_enable_7216(params, false);
 	usb_init_common(params);
 }
diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.h b/drivers/phy/broadcom/phy-brcm-usb-init.h
index f9fbf8fb80e5..c1a88f5cd4cd 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init.h
+++ b/drivers/phy/broadcom/phy-brcm-usb-init.h
@@ -34,6 +34,14 @@ enum brcmusb_reg_sel {
 	brcm_usb_ctrl_unset(USB_CTRL_REG(base, reg),		\
 			    USB_CTRL_##reg##_##field##_MASK)
 
+#define USB_XHCI_GBL_REG(base, reg) ((void __iomem *)base + USB_XHCI_GBL_##reg)
+#define USB_XHCI_GBL_SET(base, reg, field) \
+	brcm_usb_ctrl_set(USB_XHCI_GBL_REG(base, reg), \
+			  USB_XHCI_GBL_##reg##_##field##_MASK)
+#define USB_XHCI_GBL_UNSET(base, reg, field) \
+	brcm_usb_ctrl_unset(USB_XHCI_GBL_REG(base, reg), \
+			    USB_XHCI_GBL_##reg##_##field##_MASK)
+
 struct  brcm_usb_init_params;
 
 struct brcm_usb_init_ops {
-- 
2.7.4


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^ permalink raw reply	[flat|nested] 3+ messages in thread

* [PATCH 2/2] phy: usb: suppress OC condition for 7439b2
       [not found] <1686859578-45242-1-git-send-email-justin.chen@broadcom.com>
  2023-06-15 20:06 ` [PATCH 1/2] phy: usb: Turn off phy when port is in suspend Justin Chen
@ 2023-06-15 20:06 ` Justin Chen
  2023-06-19 10:39   ` Florian Fainelli
  1 sibling, 1 reply; 3+ messages in thread
From: Justin Chen @ 2023-06-15 20:06 UTC (permalink / raw)
  To: linux-phy
  Cc: bcm-kernel-feedback-list, florian.fainelli, Justin Chen,
	Justin Chen, Al Cooper, Vinod Koul, Kishon Vijay Abraham I,
	open list:BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER

[-- Attachment #1: Type: text/plain, Size: 6479 bytes --]

We hit a false positive OC for 7439b2 in DRD/device mode for the
second port. So disable the OC check for this use case. Add capability
to suppress OC condition for specific ports.

Signed-off-by: Justin Chen <justin.chen@broadcom.com>
---
 drivers/phy/broadcom/phy-brcm-usb-init.c | 34 ++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.c b/drivers/phy/broadcom/phy-brcm-usb-init.c
index a1ca83308f98..39536b6d96a9 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init.c
+++ b/drivers/phy/broadcom/phy-brcm-usb-init.c
@@ -35,6 +35,11 @@
 #define   USB_CTRL_SETUP_STRAP_IPP_SEL_MASK		BIT(25) /* option */
 #define   USB_CTRL_SETUP_CC_DRD_MODE_ENABLE_MASK	BIT(26) /* option */
 #define   USB_CTRL_SETUP_STRAP_CC_DRD_MODE_ENABLE_SEL_MASK BIT(27) /* opt */
+#define   USB_CTRL_SETUP_OC_DISABLE_PORT0_MASK		BIT(28)
+#define   USB_CTRL_SETUP_OC_DISABLE_PORT1_MASK		BIT(29)
+#define   USB_CTRL_SETUP_OC_DISABLE_MASK		GENMASK(29, 28) /* option */
+#define   USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK		BIT(30)
+#define   USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK		BIT(31)
 #define   USB_CTRL_SETUP_OC3_DISABLE_MASK		GENMASK(31, 30) /* option */
 #define USB_CTRL_PLL_CTL		0x04
 #define   USB_CTRL_PLL_CTL_PLL_SUSPEND_EN_MASK		BIT(27)
@@ -114,6 +119,8 @@ enum {
 	USB_CTRL_SETUP_SCB2_EN_SELECTOR,
 	USB_CTRL_SETUP_SS_EHCI64BIT_EN_SELECTOR,
 	USB_CTRL_SETUP_STRAP_IPP_SEL_SELECTOR,
+	USB_CTRL_SETUP_OC3_DISABLE_PORT0_SELECTOR,
+	USB_CTRL_SETUP_OC3_DISABLE_PORT1_SELECTOR,
 	USB_CTRL_SETUP_OC3_DISABLE_SELECTOR,
 	USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_SELECTOR,
 	USB_CTRL_USB_PM_BDC_SOFT_RESETB_SELECTOR,
@@ -190,6 +197,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		USB_CTRL_SETUP_STRAP_IPP_SEL_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
 		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
@@ -232,6 +241,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		0, /* USB_CTRL_SETUP_STRAP_IPP_SEL_MASK */
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK,
 		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
@@ -253,6 +264,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		0, /* USB_CTRL_SETUP_SCB2_EN_MASK */
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		USB_CTRL_SETUP_STRAP_IPP_SEL_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
 		USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK,
@@ -274,6 +287,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		0, /* USB_CTRL_SETUP_STRAP_IPP_SEL_MASK */
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK,
 		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
@@ -295,6 +310,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		0, /* USB_CTRL_SETUP_STRAP_IPP_SEL_MASK */
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
 		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
@@ -316,6 +333,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_VAR_MASK,
 		0, /* USB_CTRL_SETUP_STRAP_IPP_SEL_MASK */
+		0, /* USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK */
+		0, /* USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK */
 		0, /* USB_CTRL_SETUP_OC3_DISABLE_MASK */
 		USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK,
 		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
@@ -337,6 +356,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		USB_CTRL_SETUP_STRAP_IPP_SEL_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
 		USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK,
@@ -358,6 +379,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		USB_CTRL_SETUP_SCB2_EN_MASK,
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_VAR_MASK,
 		0, /* USB_CTRL_SETUP_STRAP_IPP_SEL_MASK */
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK,
 		0, /* USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK */
@@ -379,6 +402,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		0, /* USB_CTRL_SETUP_SCB2_EN_MASK */
 		USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK,
 		USB_CTRL_SETUP_STRAP_IPP_SEL_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
 		USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK,
@@ -400,6 +425,8 @@ usb_reg_bits_map_table[BRCM_FAMILY_COUNT][USB_CTRL_SELECTOR_COUNT] = {
 		0, /* USB_CTRL_SETUP_SCB2_EN_MASK */
 		0, /*USB_CTRL_SETUP_SS_EHCI64BIT_EN_MASK */
 		USB_CTRL_SETUP_STRAP_IPP_SEL_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT0_MASK,
+		USB_CTRL_SETUP_OC3_DISABLE_PORT1_MASK,
 		USB_CTRL_SETUP_OC3_DISABLE_MASK,
 		0, /* USB_CTRL_PLL_CTL_PLL_IDDQ_PWRDN_MASK */
 		USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK,
@@ -872,6 +899,13 @@ static void usb_init_common(struct brcm_usb_init_params *params)
 
 	brcmusb_memc_fix(params);
 
+	/* Workaround for false positive OC for 7439b2 in DRD/Device mode */
+	if ((params->family_id == 0x74390012) &&
+	    (params->supported_port_modes != USB_CTLR_MODE_HOST)) {
+		USB_CTRL_SET(ctrl, SETUP, OC_DISABLE_PORT1);
+		USB_CTRL_SET_FAMILY(params, SETUP, OC3_DISABLE_PORT1);
+	}
+
 	if (USB_CTRL_MASK_FAMILY(params, USB_DEVICE_CTL1, PORT_MODE)) {
 		reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
 		reg &= ~USB_CTRL_MASK_FAMILY(params, USB_DEVICE_CTL1,
-- 
2.7.4


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^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH 2/2] phy: usb: suppress OC condition for 7439b2
  2023-06-15 20:06 ` [PATCH 2/2] phy: usb: suppress OC condition for 7439b2 Justin Chen
@ 2023-06-19 10:39   ` Florian Fainelli
  0 siblings, 0 replies; 3+ messages in thread
From: Florian Fainelli @ 2023-06-19 10:39 UTC (permalink / raw)
  To: Justin Chen, linux-phy
  Cc: bcm-kernel-feedback-list, Justin Chen, Al Cooper, Vinod Koul,
	Kishon Vijay Abraham I,
	open list:BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER

[-- Attachment #1: Type: text/plain, Size: 364 bytes --]



On 6/15/2023 1:06 PM, Justin Chen wrote:
> We hit a false positive OC for 7439b2 in DRD/device mode for the
> second port. So disable the OC check for this use case. Add capability
> to suppress OC condition for specific ports.
> 
> Signed-off-by: Justin Chen <justin.chen@broadcom.com>

Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
-- 
Florian

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^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2023-06-19 10:39 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <1686859578-45242-1-git-send-email-justin.chen@broadcom.com>
2023-06-15 20:06 ` [PATCH 1/2] phy: usb: Turn off phy when port is in suspend Justin Chen
2023-06-15 20:06 ` [PATCH 2/2] phy: usb: suppress OC condition for 7439b2 Justin Chen
2023-06-19 10:39   ` Florian Fainelli

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