diff options
Diffstat (limited to 'target/linux/ipq806x/patches-3.18/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-3.18/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-3.18/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch b/target/linux/ipq806x/patches-3.18/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch new file mode 100644 index 0000000..25803b8 --- /dev/null +++ b/target/linux/ipq806x/patches-3.18/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch @@ -0,0 +1,511 @@ +--- a/drivers/phy/Kconfig ++++ b/drivers/phy/Kconfig +@@ -256,4 +256,15 @@ config PHY_STIH41X_USB + Enable this to support the USB transceiver that is part of + STMicroelectronics STiH41x SoC series. + ++config PHY_QCOM_DWC3 ++ tristate "QCOM DWC3 USB PHY support" ++ depends on ARCH_QCOM ++ depends on HAS_IOMEM ++ depends on OF ++ select GENERIC_PHY ++ help ++ This option enables support for the Synopsis PHYs present inside the ++ Qualcomm USB3.0 DWC3 controller. This driver supports both HS and SS ++ PHY controllers. ++ + endmenu +--- a/drivers/phy/Makefile ++++ b/drivers/phy/Makefile +@@ -31,3 +31,4 @@ obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += + obj-$(CONFIG_PHY_XGENE) += phy-xgene.o + obj-$(CONFIG_PHY_STIH407_USB) += phy-stih407-usb.o + obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o ++obj-$(CONFIG_PHY_QCOM_DWC3) += phy-qcom-dwc3.o +--- /dev/null ++++ b/drivers/phy/phy-qcom-dwc3.c +@@ -0,0 +1,483 @@ ++/* Copyright (c) 2013-2014, Code Aurora Forum. All rights reserved. ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 and ++ * only version 2 as published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ */ ++ ++#include <linux/clk.h> ++#include <linux/err.h> ++#include <linux/io.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/phy/phy.h> ++#include <linux/platform_device.h> ++#include <linux/delay.h> ++ ++/** ++ * USB QSCRATCH Hardware registers ++ */ ++#define QSCRATCH_GENERAL_CFG (0x08) ++#define HSUSB_PHY_CTRL_REG (0x10) ++ ++/* PHY_CTRL_REG */ ++#define HSUSB_CTRL_DMSEHV_CLAMP BIT(24) ++#define HSUSB_CTRL_USB2_SUSPEND BIT(23) ++#define HSUSB_CTRL_UTMI_CLK_EN BIT(21) ++#define HSUSB_CTRL_UTMI_OTG_VBUS_VALID BIT(20) ++#define HSUSB_CTRL_USE_CLKCORE BIT(18) ++#define HSUSB_CTRL_DPSEHV_CLAMP BIT(17) ++#define HSUSB_CTRL_COMMONONN BIT(11) ++#define HSUSB_CTRL_ID_HV_CLAMP BIT(9) ++#define HSUSB_CTRL_OTGSESSVLD_CLAMP BIT(8) ++#define HSUSB_CTRL_CLAMP_EN BIT(7) ++#define HSUSB_CTRL_RETENABLEN BIT(1) ++#define HSUSB_CTRL_POR BIT(0) ++ ++/* QSCRATCH_GENERAL_CFG */ ++#define HSUSB_GCFG_XHCI_REV BIT(2) ++ ++/** ++ * USB QSCRATCH Hardware registers ++ */ ++#define SSUSB_PHY_CTRL_REG (0x00) ++#define SSUSB_PHY_PARAM_CTRL_1 (0x04) ++#define SSUSB_PHY_PARAM_CTRL_2 (0x08) ++#define CR_PROTOCOL_DATA_IN_REG (0x0c) ++#define CR_PROTOCOL_DATA_OUT_REG (0x10) ++#define CR_PROTOCOL_CAP_ADDR_REG (0x14) ++#define CR_PROTOCOL_CAP_DATA_REG (0x18) ++#define CR_PROTOCOL_READ_REG (0x1c) ++#define CR_PROTOCOL_WRITE_REG (0x20) ++ ++/* PHY_CTRL_REG */ ++#define SSUSB_CTRL_REF_USE_PAD BIT(28) ++#define SSUSB_CTRL_TEST_POWERDOWN BIT(27) ++#define SSUSB_CTRL_LANE0_PWR_PRESENT BIT(24) ++#define SSUSB_CTRL_SS_PHY_EN BIT(8) ++#define SSUSB_CTRL_SS_PHY_RESET BIT(7) ++ ++/* SSPHY control registers */ ++#define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * lane) ++#define SSPHY_CTRL_TX_OVRD_DRV_LO(lane) (0x1002 + 0x100 * lane) ++ ++/* 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) ++#define RX_OVRD_IN_HI_RX_EQ_OVRD BIT(11) ++#define RX_OVRD_IN_HI_RX_EQ_MASK 0x0700 ++#define RX_OVRD_IN_HI_RX_EQ_SHIFT 8 ++#define RX_OVRD_IN_HI_RX_EQ_EN_OVRD BIT(7) ++#define RX_OVRD_IN_HI_RX_EQ_EN BIT(6) ++#define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD BIT(5) ++#define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK 0x0018 ++#define RX_OVRD_IN_HI_RX_RATE_OVRD BIT(2) ++#define RX_OVRD_IN_HI_RX_RATE_MASK 0x0003 ++ ++/* TX OVRD DRV LO register bits */ ++#define TX_OVRD_DRV_LO_AMPLITUDE_MASK 0x007F ++#define TX_OVRD_DRV_LO_PREEMPH_MASK 0x3F80 ++#define TX_OVRD_DRV_LO_PREEMPH_SHIFT 7 ++#define TX_OVRD_DRV_LO_EN BIT(14) ++ ++struct qcom_dwc3_usb_phy { ++ void __iomem *base; ++ struct device *dev; ++ struct phy *phy; ++ ++ int (*phy_init)(struct qcom_dwc3_usb_phy *phy_dwc3); ++ int (*phy_exit)(struct qcom_dwc3_usb_phy *phy_dwc3); ++ ++ struct clk *xo_clk; ++ struct clk *ref_clk; ++}; ++ ++/** ++ * Write register and read back masked value to confirm it is written ++ * ++ * @base - QCOM DWC3 PHY base virtual address. ++ * @offset - register offset. ++ * @mask - register bitmask specifying what should be updated ++ * @val - value to write. ++ */ ++static inline void qcom_dwc3_phy_write_readback( ++ struct qcom_dwc3_usb_phy *phy_dwc3, u32 offset, ++ const u32 mask, u32 val) ++{ ++ u32 write_val, tmp = readl(phy_dwc3->base + offset); ++ ++ tmp &= ~mask; /* retain other bits */ ++ write_val = tmp | val; ++ ++ writel(write_val, phy_dwc3->base + offset); ++ ++ /* Read back to see if val was written */ ++ tmp = readl(phy_dwc3->base + offset); ++ tmp &= mask; /* clear other bits */ ++ ++ if (tmp != val) ++ dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n", ++ val, offset); ++} ++ ++static int wait_for_latch(void __iomem *addr) ++{ ++ u32 retry = 10; ++ ++ while (true) { ++ if (!readl(addr)) ++ break; ++ ++ if (--retry == 0) ++ return -ETIMEDOUT; ++ ++ usleep_range(10, 20); ++ } ++ ++ return 0; ++} ++ ++/** ++ * Write SSPHY register ++ * ++ * @base - QCOM DWC3 PHY base virtual address. ++ * @addr - SSPHY address to write. ++ * @val - value to write. ++ */ ++static int qcom_dwc3_ss_write_phycreg(void __iomem *base, u32 addr, u32 val) ++{ ++ int ret; ++ ++ writel(addr, base + CR_PROTOCOL_DATA_IN_REG); ++ writel(0x1, base + CR_PROTOCOL_CAP_ADDR_REG); ++ ++ ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG); ++ if (ret) ++ goto err_wait; ++ ++ writel(val, base + CR_PROTOCOL_DATA_IN_REG); ++ writel(0x1, base + CR_PROTOCOL_CAP_DATA_REG); ++ ++ ret = wait_for_latch(base + CR_PROTOCOL_CAP_DATA_REG); ++ if (ret) ++ goto err_wait; ++ ++ writel(0x1, base + CR_PROTOCOL_WRITE_REG); ++ ++ ret = wait_for_latch(base + CR_PROTOCOL_WRITE_REG); ++ ++err_wait: ++ return ret; ++} ++ ++/** ++ * Read SSPHY register. ++ * ++ * @base - QCOM DWC3 PHY base virtual address. ++ * @addr - SSPHY address to read. ++ */ ++static int qcom_dwc3_ss_read_phycreg(void __iomem *base, u32 addr, u32 *val) ++{ ++ int ret; ++ bool first_read = true; ++ ++ writel(addr, base + CR_PROTOCOL_DATA_IN_REG); ++ writel(0x1, base + CR_PROTOCOL_CAP_ADDR_REG); ++ ++ ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG); ++ if (ret) ++ goto err_wait; ++ ++ /* ++ * Due to hardware bug, first read of SSPHY register might be ++ * incorrect. Hence as workaround, SW should perform SSPHY register ++ * read twice, but use only second read and ignore first read. ++ */ ++retry: ++ writel(0x1, base + CR_PROTOCOL_READ_REG); ++ ++ ret = wait_for_latch(base + CR_PROTOCOL_READ_REG); ++ if (ret) ++ goto err_wait; ++ ++ if (first_read) { ++ readl(base + CR_PROTOCOL_DATA_OUT_REG); ++ first_read = false; ++ goto retry; ++ } ++ ++ *val = readl(base + CR_PROTOCOL_DATA_OUT_REG); ++ ++err_wait: ++ return ret; ++} ++ ++static int qcom_dwc3_phy_power_on(struct phy *phy) ++{ ++ int ret; ++ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy); ++ ++ 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; ++} ++ ++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 qcom_dwc3_usb_phy *phy_dwc3) ++{ ++ u32 val; ++ ++ /* ++ * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel ++ * enable clamping, and disable RETENTION (power-on default is ENABLED) ++ */ ++ val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP | ++ HSUSB_CTRL_RETENABLEN | HSUSB_CTRL_COMMONONN | ++ HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP | ++ HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID | ++ HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70; ++ ++ /* use core clock if external reference is not present */ ++ if (!phy_dwc3->xo_clk) ++ val |= HSUSB_CTRL_USE_CLKCORE; ++ ++ writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG); ++ usleep_range(2000, 2200); ++ ++ /* Disable (bypass) VBUS and ID filters */ ++ writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG); ++ ++ return 0; ++} ++ ++static int qcom_dwc3_ss_phy_init(struct qcom_dwc3_usb_phy *phy_dwc3) ++{ ++ int ret; ++ u32 data = 0; ++ ++ /* reset phy */ ++ data = readl_relaxed(phy_dwc3->base + SSUSB_PHY_CTRL_REG); ++ writel_relaxed(data | SSUSB_CTRL_SS_PHY_RESET, ++ phy_dwc3->base + SSUSB_PHY_CTRL_REG); ++ usleep_range(2000, 2200); ++ writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG); ++ ++ /* clear REF_PAD if we don't have XO clk */ ++ if (!phy_dwc3->xo_clk) ++ data &= ~SSUSB_CTRL_REF_USE_PAD; ++ else ++ data |= SSUSB_CTRL_REF_USE_PAD; ++ ++ writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG); ++ msleep(30); ++ ++ data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT; ++ writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG); ++ ++ /* ++ * 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_OVRD set to 1 ++ */ ++ ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base, ++ SSPHY_CTRL_RX_OVRD_IN_HI(0), &data); ++ if (ret) ++ goto err_phy_trans; ++ ++ 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 |= RX_OVRD_IN_HI_RX_EQ_OVRD; ++ ret = qcom_dwc3_ss_write_phycreg(phy_dwc3->base, ++ SSPHY_CTRL_RX_OVRD_IN_HI(0), data); ++ if (ret) ++ goto err_phy_trans; ++ ++ /* ++ * 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.EN set to 1. ++ */ ++ ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base, ++ SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data); ++ if (ret) ++ goto err_phy_trans; ++ ++ data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK; ++ data |= 0x16 << TX_OVRD_DRV_LO_PREEMPH_SHIFT; ++ data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK; ++ data |= 0x7f; ++ data |= TX_OVRD_DRV_LO_EN; ++ ret = qcom_dwc3_ss_write_phycreg(phy_dwc3->base, ++ SSPHY_CTRL_TX_OVRD_DRV_LO(0), data); ++ if (ret) ++ goto err_phy_trans; ++ ++ /* ++ * 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 ++ */ ++ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1, ++ 0x07f03f07, 0x07f01605); ++ ++err_phy_trans: ++ return ret; ++} ++ ++static int qcom_dwc3_ss_phy_exit(struct qcom_dwc3_usb_phy *phy_dwc3) ++{ ++ /* Sequence to put SSPHY in low power state: ++ * 1. Clear REF_PHY_EN in PHY_CTRL_REG ++ * 2. Clear REF_USE_PAD in PHY_CTRL_REG ++ * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention ++ * 4. Disable SSPHY ref clk ++ */ ++ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG, ++ SSUSB_CTRL_SS_PHY_EN, 0x0); ++ 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); ++ ++ return 0; ++} ++ ++static int qcom_dwc3_phy_init(struct phy *phy) ++{ ++ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy); ++ ++ if (phy_dwc3->phy_init) ++ return phy_dwc3->phy_init(phy_dwc3); ++ ++ return 0; ++} ++ ++static int qcom_dwc3_phy_exit(struct phy *phy) ++{ ++ struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy); ++ ++ if (phy_dwc3->phy_exit) ++ return qcom_dwc3_ss_phy_exit(phy_dwc3); ++ ++ return 0; ++} ++ ++static struct phy_ops qcom_dwc3_phy_ops = { ++ .init = qcom_dwc3_phy_init, ++ .exit = qcom_dwc3_phy_exit, ++ .power_on = qcom_dwc3_phy_power_on, ++ .power_off = qcom_dwc3_phy_power_off, ++ .owner = THIS_MODULE, ++}; ++ ++static const struct of_device_id qcom_dwc3_phy_table[] = { ++ { .compatible = "qcom,dwc3-hs-usb-phy", }, ++ { .compatible = "qcom,dwc3-ss-usb-phy", }, ++ { /* Sentinel */ } ++}; ++MODULE_DEVICE_TABLE(of, qcom_dwc3_phy_table); ++ ++static int qcom_dwc3_phy_probe(struct platform_device *pdev) ++{ ++ struct qcom_dwc3_usb_phy *phy_dwc3; ++ struct phy_provider *phy_provider; ++ struct resource *res; ++ ++ phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL); ++ if (!phy_dwc3) ++ return -ENOMEM; ++ ++ platform_set_drvdata(pdev, phy_dwc3); ++ ++ phy_dwc3->dev = &pdev->dev; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ phy_dwc3->base = devm_ioremap_resource(phy_dwc3->dev, res); ++ if (IS_ERR(phy_dwc3->base)) ++ return PTR_ERR(phy_dwc3->base); ++ ++ phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref"); ++ if (IS_ERR(phy_dwc3->ref_clk)) { ++ dev_dbg(phy_dwc3->dev, "cannot get reference clock\n"); ++ return PTR_ERR(phy_dwc3->ref_clk); ++ } ++ ++ if (of_device_is_compatible(pdev->dev.of_node, ++ "qcom,dwc3-hs-usb-phy")) { ++ clk_set_rate(phy_dwc3->ref_clk, 60000000); ++ phy_dwc3->phy_init = qcom_dwc3_hs_phy_init; ++ } else if (of_device_is_compatible(pdev->dev.of_node, ++ "qcom,dwc3-ss-usb-phy")) { ++ phy_dwc3->phy_init = qcom_dwc3_ss_phy_init; ++ phy_dwc3->phy_exit = qcom_dwc3_ss_phy_exit; ++ clk_set_rate(phy_dwc3->ref_clk, 125000000); ++ } else { ++ dev_err(phy_dwc3->dev, "Unknown phy\n"); ++ return -EINVAL; ++ } ++ ++ phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo"); ++ if (IS_ERR(phy_dwc3->xo_clk)) { ++ dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n"); ++ phy_dwc3->xo_clk = NULL; ++ } ++ ++ phy_dwc3->phy = devm_phy_create(phy_dwc3->dev, NULL, &qcom_dwc3_phy_ops, ++ NULL); ++ ++ if (IS_ERR(phy_dwc3->phy)) ++ return PTR_ERR(phy_dwc3->phy); ++ ++ phy_set_drvdata(phy_dwc3->phy, phy_dwc3); ++ ++ phy_provider = devm_of_phy_provider_register(phy_dwc3->dev, ++ of_phy_simple_xlate); ++ ++ if (IS_ERR(phy_provider)) ++ return PTR_ERR(phy_provider); ++ ++ return 0; ++} ++ ++static struct platform_driver qcom_dwc3_phy_driver = { ++ .probe = qcom_dwc3_phy_probe, ++ .driver = { ++ .name = "qcom-dwc3-usb-phy", ++ .owner = THIS_MODULE, ++ .of_match_table = qcom_dwc3_phy_table, ++ }, ++}; ++ ++module_platform_driver(qcom_dwc3_phy_driver); ++ ++MODULE_ALIAS("platform:phy-qcom-dwc3"); ++MODULE_LICENSE("GPL v2"); ++MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>"); ++MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); ++MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver"); |