diff mbox series

[2/2] phy: usb: suppress OC condition for 7439b2

Message ID	1686859578-45242-3-git-send-email-justin.chen@broadcom.com
State	New
Headers	Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; From: Justin Chen <justin.chen@broadcom.com> To: linux-phy@lists.infradead.org Cc: bcm-kernel-feedback-list@broadcom.com, florian.fainelli@broadcom.com, Justin Chen <justin.chen@broadcom.com>, Justin Chen <justinpopo6@gmail.com>, Al Cooper <alcooperx@gmail.com>, Vinod Koul <vkoul@kernel.org>, Kishon Vijay Abraham I <kishon@kernel.org>, linux-kernel@vger.kernel.org (open list:BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER) Subject: [PATCH 2/2] phy: usb: suppress OC condition for 7439b2 Date: Thu, 15 Jun 2023 13:06:17 -0700 Message-Id: <1686859578-45242-3-git-send-email-justin.chen@broadcom.com> In-Reply-To: <1686859578-45242-1-git-send-email-justin.chen@broadcom.com> References: <1686859578-45242-1-git-send-email-justin.chen@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000077a56105fe309a53" Precedence: bulk
Series	[1/2] phy: usb: Turn off phy when port is in suspend \| [1/2] phy: usb: Turn off phy when port is in suspend [2/2] phy: usb: suppress OC condition for 7439b2

Commit Message

Justin Chen June 15, 2023, 8:06 p.m. UTC

  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(+)

Comments

Florian Fainelli June 19, 2023, 10:39 a.m. UTC | #1

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>

diff mbox series

Patch

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,