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ipq806x: dwc3: Fix power_on and power_off sequence

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Picking commit from QSDK
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-msm/commit/drivers/phy/phy-qcom-dwc3.c?h=eggplant&id=d316437c9cdb70023a760342678f32e27241725a

The commit fixes:
- dwc3 phy module unloading
- possibly fixes FS#177 when some devices were improperly enumerated as HS while being SS thus stucking the driver during boot.

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
v19.07.3_mercusys_ac12_duma
Pavel Kubelun 7 years ago committed by Felix Fietkau
parent c263e18a53
commit 6617f3c6ab
1 changed files with 58 additions and 29 deletions
Show Stats Download Patch File Download Diff File

87
target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch
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@ -7,8 +7,8 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
---
drivers/phy/Kconfig | 12 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-qcom-dwc3.c | 546 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 559 insertions(+)
drivers/phy/phy-qcom-dwc3.c | 575 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 588 insertions(+)
create mode 100644 drivers/phy/phy-qcom-dwc3.c
--- a/drivers/phy/Kconfig
@ -39,7 +39,7 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+obj-$(CONFIG_PHY_QCOM_DWC3) += phy-qcom-dwc3.o
--- /dev/null
+++ b/drivers/phy/phy-qcom-dwc3.c
@@ -0,0 +1,546 @@
@@ -0,0 +1,575 @@
+/* Copyright (c) 2014-2015, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
@ -299,36 +299,21 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ return ret;
+}
+
+static int qcom_dwc3_phy_power_on(struct phy *phy)
+static int qcom_dwc3_hs_phy_init(struct phy *phy)
+{
+ int ret;
+ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+ int ret;
+ u32 val;
+
+ ret = clk_prepare_enable(phy_dwc3->xo_clk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(phy_dwc3->ref_clk);
+ if (ret)
+ if (ret) {
+ clk_disable_unprepare(phy_dwc3->xo_clk);
+
+ return ret;
+}
+
+static int qcom_dwc3_phy_power_off(struct phy *phy)
+{
+ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+
+ clk_disable_unprepare(phy_dwc3->ref_clk);
+ clk_disable_unprepare(phy_dwc3->xo_clk);
+
+ return 0;
+}
+
+static int qcom_dwc3_hs_phy_init(struct phy *phy)
+{
+ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+ u32 val;
+ return ret;
+ }
+
+ /*
+ * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
@ -353,12 +338,32 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ return 0;
+}
+
+static int qcom_dwc3_hs_phy_exit(struct phy *phy)
+{
+ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+
+ clk_disable_unprepare(phy_dwc3->ref_clk);
+ clk_disable_unprepare(phy_dwc3->xo_clk);
+
+ return 0;
+}
+
+static int qcom_dwc3_ss_phy_init(struct phy *phy)
+{
+ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+ int ret;
+ u32 data = 0;
+
+ ret = clk_prepare_enable(phy_dwc3->xo_clk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(phy_dwc3->ref_clk);
+ if (ret) {
+ clk_disable_unprepare(phy_dwc3->xo_clk);
+ return ret;
+ }
+
+ /* reset phy */
+ data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+ writel(data | SSUSB_CTRL_SS_PHY_RESET,
@ -381,6 +386,30 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+
+ /*
+ * WORKAROUND: There is SSPHY suspend bug due to which USB enumerates
+ * in HS mode instead of SS mode. Workaround it by asserting
+ * LANE0.TX_ALT_BLOCK.EN_ALT_BUS to enable TX to use alt bus mode
+ */
+ ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base, 0x102D, &data);
+ if (ret)
+ goto err_phy_trans;
+
+ data |= (1 << 7);
+ ret = qcom_dwc3_ss_write_phycreg(phy_dwc3, 0x102D, data);
+ if (ret)
+ goto err_phy_trans;
+
+ ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base, 0x1010, &data);
+ if (ret)
+ goto err_phy_trans;
+
+ data &= ~0xff0;
+ data |= 0x20;
+ ret = qcom_dwc3_ss_write_phycreg(phy_dwc3, 0x1010, data);
+ if (ret)
+ goto err_phy_trans;
+
+ /*
+ * Fix RX Equalization setting as follows
+ * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
+ * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
@ -462,7 +491,10 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
+ SSUSB_CTRL_REF_USE_PAD, 0x0);
+ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
+ 0x0, SSUSB_CTRL_TEST_POWERDOWN);
+ SSUSB_CTRL_TEST_POWERDOWN, 0x0);
+
+ clk_disable_unprepare(phy_dwc3->ref_clk);
+ clk_disable_unprepare(phy_dwc3->xo_clk);
+
+ return 0;
+}
@ -470,8 +502,7 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+static const struct qcom_dwc3_phy_drvdata qcom_dwc3_hs_drvdata = {
+ .ops = {
+ .init = qcom_dwc3_hs_phy_init,
+ .power_on = qcom_dwc3_phy_power_on,
+ .power_off = qcom_dwc3_phy_power_off,
+ .exit = qcom_dwc3_hs_phy_exit,
+ .owner = THIS_MODULE,
+ },
+ .clk_rate = 60000000,
@ -481,8 +512,6 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ .ops = {
+ .init = qcom_dwc3_ss_phy_init,
+ .exit = qcom_dwc3_ss_phy_exit,
+ .power_on = qcom_dwc3_phy_power_on,
+ .power_off = qcom_dwc3_phy_power_off,
+ .owner = THIS_MODULE,
+ },
+ .clk_rate = 125000000,

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