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ipq806x: Update HSIO recommended usb phy settings

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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=cf82fdf4bdd081cd81bb081f7815b915bc8bb851

The comit adjusts USB dwc3 phy default values as per QSDK recomendation and allows to set it through DT.

Commit message:
"SoC version based values will be recovered from the device node.
If device node does not have such values, defaults are applied.

Change-Id: Ia77b5b7fe95ce1a433885df1761091bced98d989
Signed-off-by: Gokul Sriram Palanisamy <gpalan@codeaurora.org>"

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>
master
Pavel Kubelun 8 years ago committed by Felix Fietkau
parent a4c1767897
commit c263e18a53
1 changed files with 77 additions and 15 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 92
      target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch

92
target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch
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@ -5,10 +5,10 @@ Subject: [PATCH 32/69] phy: add qcom dwc3 phy
Signed-off-by: Andy Gross <agross@codeaurora.org>
---
drivers/phy/Kconfig | 12 ++
drivers/phy/Kconfig | 12 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-qcom-dwc3.c | 484 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 497 insertions(+)
drivers/phy/phy-qcom-dwc3.c | 546 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 559 insertions(+)
create mode 100644 drivers/phy/phy-qcom-dwc3.c
--- a/drivers/phy/Kconfig
@ -32,14 +32,14 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
endmenu
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -60,3 +60,4 @@ obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-
@@ -60,3 +60,4 @@ obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
obj-$(CONFIG_ARCH_TEGRA) += tegra/
obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
+obj-$(CONFIG_PHY_QCOM_DWC3) += phy-qcom-dwc3.o
--- /dev/null
+++ b/drivers/phy/phy-qcom-dwc3.c
@@ -0,0 +1,484 @@
@@ -0,0 +1,546 @@
+/* Copyright (c) 2014-2015, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
@ -108,6 +108,33 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+#define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * lane)
+#define SSPHY_CTRL_TX_OVRD_DRV_LO(lane) (0x1002 + 0x100 * lane)
+
+/* SSPHY SoC version specific values */
+#define SSPHY_RX_EQ_VALUE 4 /* Override value for rx_eq */
+#define SSPHY_TX_DEEMPH_3_5DB 23 /* Override value for transmit
+ preemphasis */
+#define SSPHY_MPLL_VALUE 0 /* Override value for mpll */
+
+/* QSCRATCH PHY_PARAM_CTRL1 fields */
+#define PHY_PARAM_CTRL1_TX_FULL_SWING_MASK 0x07f00000u
+#define PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK 0x000fc000u
+#define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK 0x00003f00u
+#define PHY_PARAM_CTRL1_LOS_BIAS_MASK 0x000000f8u
+
+#define PHY_PARAM_CTRL1_MASK \
+ (PHY_PARAM_CTRL1_TX_FULL_SWING_MASK | \
+ PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK | \
+ PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK | \
+ PHY_PARAM_CTRL1_LOS_BIAS_MASK)
+
+#define PHY_PARAM_CTRL1_TX_FULL_SWING(x) \
+ (((x) << 20) & PHY_PARAM_CTRL1_TX_FULL_SWING_MASK)
+#define PHY_PARAM_CTRL1_TX_DEEMPH_6DB(x) \
+ (((x) << 14) & PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK)
+#define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(x) \
+ (((x) << 8) & PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK)
+#define PHY_PARAM_CTRL1_LOS_BIAS(x) \
+ (((x) << 3) & PHY_PARAM_CTRL1_LOS_BIAS_MASK)
+
+/* RX OVRD IN HI bits */
+#define RX_OVRD_IN_HI_RX_RESET_OVRD BIT(13)
+#define RX_OVRD_IN_HI_RX_RX_RESET BIT(12)
@ -138,6 +165,9 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ struct device *dev;
+ struct clk *xo_clk;
+ struct clk *ref_clk;
+ u32 rx_eq;
+ u32 tx_deamp_3_5db;
+ u32 mpll;
+};
+
+struct qcom_dwc3_phy_drvdata {
@ -354,7 +384,7 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ * 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
+ * LANE0.RX_OVRD_IN_HI.RX_EQ set to 3
+ * LANE0.RX_OVRD_IN_HI.RX_EQ set based on SoC version
+ * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
+ */
+ ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
@ -365,7 +395,7 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
+ data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
+ data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
+ data |= 0x3 << RX_OVRD_IN_HI_RX_EQ_SHIFT;
+ data |= phy_dwc3->rx_eq << RX_OVRD_IN_HI_RX_EQ_SHIFT;
+ data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
+ ret = qcom_dwc3_ss_write_phycreg(phy_dwc3,
+ SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
@ -374,8 +404,8 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+
+ /*
+ * Set EQ and TX launch amplitudes as follows
+ * LANE0.TX_OVRD_DRV_LO.PREEMPH set to 22
+ * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 127
+ * LANE0.TX_OVRD_DRV_LO.PREEMPH set based on SoC version
+ * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 110
+ * LANE0.TX_OVRD_DRV_LO.EN set to 1.
+ */
+ ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
@ -384,23 +414,35 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ goto err_phy_trans;
+
+ data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
+ data |= 0x16 << TX_OVRD_DRV_LO_PREEMPH_SHIFT;
+ data |= phy_dwc3->tx_deamp_3_5db << TX_OVRD_DRV_LO_PREEMPH_SHIFT;
+ data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
+ data |= 0x7f;
+ data |= 0x6E;
+ data |= TX_OVRD_DRV_LO_EN;
+ ret = qcom_dwc3_ss_write_phycreg(phy_dwc3,
+ SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
+ if (ret)
+ goto err_phy_trans;
+
+ qcom_dwc3_ss_write_phycreg(phy_dwc3, 0x30, phy_dwc3->mpll);
+
+ /*
+ * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
+ * TX_FULL_SWING [26:20] amplitude to 127
+ * TX_DEEMPH_3_5DB [13:8] to 22
+ * LOS_BIAS [2:0] to 0x5
+ * TX_FULL_SWING [26:20] amplitude to 110
+ * TX_DEEMPH_6DB [19:14] to 32
+ * TX_DEEMPH_3_5DB [13:8] set based on SoC version
+ * LOS_BIAS [7:3] to 9
+ */
+ data = readl(phy_dwc3->base + SSUSB_PHY_PARAM_CTRL_1);
+
+ data &= ~PHY_PARAM_CTRL1_MASK;
+
+ data |= PHY_PARAM_CTRL1_TX_FULL_SWING(0x6e) |
+ PHY_PARAM_CTRL1_TX_DEEMPH_6DB(0x20) |
+ PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(phy_dwc3->tx_deamp_3_5db) |
+ PHY_PARAM_CTRL1_LOS_BIAS(0x9);
+
+ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
+ 0x07f03f07, 0x07f01605);
+ PHY_PARAM_CTRL1_MASK, data);
+
+err_phy_trans:
+ return ret;
@ -461,6 +503,7 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ struct resource *res;
+ const struct of_device_id *match;
+ const struct qcom_dwc3_phy_drvdata *data;
+ struct device_node *np;
+
+ phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
+ if (!phy_dwc3)
@ -490,6 +533,25 @@ Signed-off-by: Andy Gross <agross@codeaurora.org>
+ phy_dwc3->xo_clk = NULL;
+ }
+
+ /* Parse device node to probe HSIO settings */
+ np = of_node_get(pdev->dev.of_node);
+ if (!of_compat_cmp(match->compatible, "qcom,dwc3-ss-usb-phy",
+ strlen(match->compatible))) {
+
+ if (of_property_read_u32(np, "rx_eq", &phy_dwc3->rx_eq) ||
+ of_property_read_u32(np, "tx_deamp_3_5db",
+ &phy_dwc3->tx_deamp_3_5db) ||
+ of_property_read_u32(np, "mpll", &phy_dwc3->mpll)) {
+
+ dev_err(phy_dwc3->dev, "cannot get HSIO settings from device node, using default values\n");
+
+ /* Default HSIO settings */
+ phy_dwc3->rx_eq = SSPHY_RX_EQ_VALUE;
+ phy_dwc3->tx_deamp_3_5db = SSPHY_TX_DEEMPH_3_5DB;
+ phy_dwc3->mpll = SSPHY_MPLL_VALUE;
+ }
+ }
+
+ generic_phy = devm_phy_create(phy_dwc3->dev, pdev->dev.of_node,
+ &data->ops);
+

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