From e8d6fd46f5f3c5860fa7fa98004de9bd97c0d869 Mon Sep 17 00:00:00 2001 From: Senthilkumar N L Date: Tue, 6 Jan 2015 12:52:23 +0530 Subject: [PATCH 34/37] qcom: ipq4019: Add IPQ4019 USB HS/SS PHY drivers These drivers handles control and configuration of the HS and SS USB PHY transceivers. Signed-off-by: Senthilkumar N L --- drivers/usb/phy/Kconfig | 11 ++ drivers/usb/phy/Makefile | 2 + drivers/usb/phy/phy-qca-baldur.c | 262 ++++++++++++++++++++++++++++++++++++++ drivers/usb/phy/phy-qca-uniphy.c | 171 +++++++++++++++++++++++++ 4 files changed, 446 insertions(+) create mode 100644 drivers/usb/phy/phy-qca-baldur.c create mode 100644 drivers/usb/phy/phy-qca-uniphy.c --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -194,6 +194,17 @@ config USB_MXS_PHY MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x. +config USB_IPQ4019_PHY + tristate "IPQ4019 PHY wrappers support" + depends on (USB || USB_GADGET) && ARCH_QCOM + select USB_PHY + help + Enable this to support the USB PHY transceivers on QCA961x chips. + It handles PHY initialization, clock management required after + resetting the hardware and power management. + This driver is required even for peripheral only or host only + mode configurations. + config USB_ULPI bool "Generic ULPI Transceiver Driver" depends on ARM || ARM64 --- a/drivers/usb/phy/Makefile +++ b/drivers/usb/phy/Makefile @@ -21,6 +21,8 @@ obj-$(CONFIG_USB_GPIO_VBUS) += phy-gpio obj-$(CONFIG_USB_ISP1301) += phy-isp1301.o obj-$(CONFIG_USB_MSM_OTG) += phy-msm-usb.o obj-$(CONFIG_USB_QCOM_8X16_PHY) += phy-qcom-8x16-usb.o +obj-$(CONFIG_USB_IPQ4019_PHY) += phy-qca-baldur.o +obj-$(CONFIG_USB_IPQ4019_PHY) += phy-qca-uniphy.o obj-$(CONFIG_USB_MV_OTG) += phy-mv-usb.o obj-$(CONFIG_USB_MXS_PHY) += phy-mxs-usb.o obj-$(CONFIG_USB_ULPI) += phy-ulpi.o --- /dev/null +++ b/drivers/usb/phy/phy-qca-baldur.c @@ -0,0 +1,262 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/** + * USB Hardware registers + */ +#define PHY_CTRL0_ADDR 0x000 +#define PHY_CTRL1_ADDR 0x004 +#define PHY_CTRL2_ADDR 0x008 +#define PHY_CTRL3_ADDR 0x00C +#define PHY_CTRL4_ADDR 0x010 +#define PHY_MISC_ADDR 0x024 +#define PHY_IPG_ADDR 0x030 + +#define PHY_CTRL0_EMU_ADDR 0x180 +#define PHY_CTRL1_EMU_ADDR 0x184 +#define PHY_CTRL2_EMU_ADDR 0x188 +#define PHY_CTRL3_EMU_ADDR 0x18C +#define PHY_CTRL4_EMU_ADDR 0x190 +#define PHY_MISC_EMU_ADDR 0x1A4 +#define PHY_IPG_EMU_ADDR 0x1B0 + +#define PHY_CTRL0_VAL 0xA4600015 +#define PHY_CTRL1_VAL 0x09500000 +#define PHY_CTRL2_VAL 0x00058180 +#define PHY_CTRL3_VAL 0x6DB6DCD6 +#define PHY_CTRL4_VAL 0x836DB6DB +#define PHY_MISC_VAL 0x3803FB0C +#define PHY_IPG_VAL 0x47323232 + +#define PHY_CTRL0_EMU_VAL 0xb4000015 +#define PHY_CTRL1_EMU_VAL 0x09500000 +#define PHY_CTRL2_EMU_VAL 0x00058180 +#define PHY_CTRL3_EMU_VAL 0x6DB6DCD6 +#define PHY_CTRL4_EMU_VAL 0x836DB6DB +#define PHY_MISC_EMU_VAL 0x3803FB0C +#define PHY_IPG_EMU_VAL 0x47323232 + +#define USB30_HS_PHY_HOST_MODE (0x01 << 21) +#define USB20_HS_PHY_HOST_MODE (0x01 << 5) + +/* used to differentiate between USB3 HS and USB2 HS PHY */ +struct qca_baldur_hs_data { + unsigned int usb3_hs_phy; + unsigned int phy_config_offset; +}; + +struct qca_baldur_hs_phy { + struct device *dev; + struct usb_phy phy; + + void __iomem *base; + void __iomem *qscratch_base; + + struct reset_control *por_rst; + struct reset_control *srif_rst; + + unsigned int host; + unsigned int emulation; + const struct qca_baldur_hs_data *data; +}; + +#define phy_to_dw_phy(x) container_of((x), struct qca_baldur_hs_phy, phy) + +static int qca_baldur_phy_read(struct usb_phy *x, u32 reg) +{ + struct qca_baldur_hs_phy *phy = phy_to_dw_phy(x); + + return readl(phy->base + reg); +} + +static int qca_baldur_phy_write(struct usb_phy *x, u32 val, u32 reg) +{ + struct qca_baldur_hs_phy *phy = phy_to_dw_phy(x); + + writel(val, phy->base + reg); + return 0; +} + +static int qca_baldur_hs_phy_init(struct usb_phy *x) +{ + struct qca_baldur_hs_phy *phy = phy_to_dw_phy(x); + + /* assert HS PHY POR reset */ + reset_control_assert(phy->por_rst); + msleep(10); + + /* assert HS PHY SRIF reset */ + reset_control_assert(phy->srif_rst); + msleep(10); + + /* deassert HS PHY SRIF reset and program HS PHY registers */ + reset_control_deassert(phy->srif_rst); + msleep(10); + + if (!phy->emulation) { + /* perform PHY register writes */ + writel(PHY_CTRL0_VAL, phy->base + PHY_CTRL0_ADDR); + writel(PHY_CTRL1_VAL, phy->base + PHY_CTRL1_ADDR); + writel(PHY_CTRL2_VAL, phy->base + PHY_CTRL2_ADDR); + writel(PHY_CTRL3_VAL, phy->base + PHY_CTRL3_ADDR); + writel(PHY_CTRL4_VAL, phy->base + PHY_CTRL4_ADDR); + writel(PHY_MISC_VAL, phy->base + PHY_MISC_ADDR); + writel(PHY_IPG_VAL, phy->base + PHY_IPG_ADDR); + } else { + /* perform PHY register writes */ + writel(PHY_CTRL0_EMU_VAL, phy->base + PHY_CTRL0_EMU_ADDR); + writel(PHY_CTRL1_EMU_VAL, phy->base + PHY_CTRL1_EMU_ADDR); + writel(PHY_CTRL2_EMU_VAL, phy->base + PHY_CTRL2_EMU_ADDR); + writel(PHY_CTRL3_EMU_VAL, phy->base + PHY_CTRL3_EMU_ADDR); + writel(PHY_CTRL4_EMU_VAL, phy->base + PHY_CTRL4_EMU_ADDR); + writel(PHY_MISC_EMU_VAL, phy->base + PHY_MISC_EMU_ADDR); + writel(PHY_IPG_EMU_VAL, phy->base + PHY_IPG_EMU_ADDR); + } + + msleep(10); + + /* de-assert USB3 HS PHY POR reset */ + reset_control_deassert(phy->por_rst); + + return 0; +} + +static int qca_baldur_hs_get_resources(struct qca_baldur_hs_phy *phy) +{ + struct platform_device *pdev = to_platform_device(phy->dev); + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy->base = devm_ioremap_resource(phy->dev, res); + if (IS_ERR(phy->base)) + return PTR_ERR(phy->base); + + phy->por_rst = devm_reset_control_get(phy->dev, "por_rst"); + if (IS_ERR(phy->por_rst)) + return PTR_ERR(phy->por_rst); + + phy->srif_rst = devm_reset_control_get(phy->dev, "srif_rst"); + if (IS_ERR(phy->srif_rst)) + return PTR_ERR(phy->srif_rst); + + return 0; +} + +static void qca_baldur_hs_put_resources(struct qca_baldur_hs_phy *phy) +{ + reset_control_assert(phy->srif_rst); + reset_control_assert(phy->por_rst); +} + +static int qca_baldur_hs_remove(struct platform_device *pdev) +{ + struct qca_baldur_hs_phy *phy = platform_get_drvdata(pdev); + + usb_remove_phy(&phy->phy); + return 0; +} + +static void qca_baldur_hs_phy_shutdown(struct usb_phy *x) +{ + struct qca_baldur_hs_phy *phy = phy_to_dw_phy(x); + + qca_baldur_hs_put_resources(phy); +} + +static struct usb_phy_io_ops qca_baldur_io_ops = { + .read = qca_baldur_phy_read, + .write = qca_baldur_phy_write, +}; + +static const struct qca_baldur_hs_data usb3_hs_data = { + .usb3_hs_phy = 1, + .phy_config_offset = USB30_HS_PHY_HOST_MODE, +}; + +static const struct qca_baldur_hs_data usb2_hs_data = { + .usb3_hs_phy = 0, + .phy_config_offset = USB20_HS_PHY_HOST_MODE, +}; + +static const struct of_device_id qca_baldur_hs_id_table[] = { + { .compatible = "qca,baldur-usb3-hsphy", .data = &usb3_hs_data }, + { .compatible = "qca,baldur-usb2-hsphy", .data = &usb2_hs_data }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, qca_baldur_hs_id_table); + +static int qca_baldur_hs_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct qca_baldur_hs_phy *phy; + int err; + + match = of_match_device(qca_baldur_hs_id_table, &pdev->dev); + if (!match) + return -ENODEV; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + platform_set_drvdata(pdev, phy); + phy->dev = &pdev->dev; + + phy->data = match->data; + + err = qca_baldur_hs_get_resources(phy); + if (err < 0) { + dev_err(&pdev->dev, "failed to request resources: %d\n", err); + return err; + } + + phy->phy.dev = phy->dev; + phy->phy.label = "qca-baldur-hsphy"; + phy->phy.init = qca_baldur_hs_phy_init; + phy->phy.shutdown = qca_baldur_hs_phy_shutdown; + phy->phy.type = USB_PHY_TYPE_USB2; + phy->phy.io_ops = &qca_baldur_io_ops; + + err = usb_add_phy_dev(&phy->phy); + return err; +} + +static struct platform_driver qca_baldur_hs_driver = { + .probe = qca_baldur_hs_probe, + .remove = qca_baldur_hs_remove, + .driver = { + .name = "qca-baldur-hsphy", + .owner = THIS_MODULE, + .of_match_table = qca_baldur_hs_id_table, + }, +}; + +module_platform_driver(qca_baldur_hs_driver); + +MODULE_ALIAS("platform:qca-baldur-hsphy"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("USB3 QCA BALDUR HSPHY driver"); --- /dev/null +++ b/drivers/usb/phy/phy-qca-uniphy.c @@ -0,0 +1,171 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct qca_uni_ss_phy { + struct usb_phy phy; + struct device *dev; + + void __iomem *base; + + struct reset_control *por_rst; + + unsigned int host; +}; + +#define phy_to_dw_phy(x) container_of((x), struct qca_uni_ss_phy, phy) + +/** + * Write register + * + * @base - PHY base virtual address. + * @offset - register offset. + */ +static u32 qca_uni_ss_read(void __iomem *base, u32 offset) +{ + u32 value; + value = readl_relaxed(base + offset); + return value; +} + +/** + * Write register + * + * @base - PHY base virtual address. + * @offset - register offset. + * @val - value to write. + */ +static void qca_uni_ss_write(void __iomem *base, u32 offset, u32 val) +{ + writel(val, base + offset); + udelay(100); +} + +static void qca_uni_ss_phy_shutdown(struct usb_phy *x) +{ + struct qca_uni_ss_phy *phy = phy_to_dw_phy(x); + + /* assert SS PHY POR reset */ + reset_control_assert(phy->por_rst); +} + +static int qca_uni_ss_phy_init(struct usb_phy *x) +{ + struct qca_uni_ss_phy *phy = phy_to_dw_phy(x); + + /* assert SS PHY POR reset */ + reset_control_assert(phy->por_rst); + + msleep(10); + + msleep(10); + + /* deassert SS PHY POR reset */ + reset_control_deassert(phy->por_rst); + + return 0; +} + +static int qca_uni_ss_get_resources(struct platform_device *pdev, + struct qca_uni_ss_phy *phy) +{ + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy->base = devm_ioremap_resource(phy->dev, res); + if (IS_ERR(phy->base)) + return PTR_ERR(phy->base); + + phy->por_rst = devm_reset_control_get(phy->dev, "por_rst"); + if (IS_ERR(phy->por_rst)) + return PTR_ERR(phy->por_rst); + + return 0; +} + +static int qca_uni_ss_remove(struct platform_device *pdev) +{ + struct qca_uni_ss_phy *phy = platform_get_drvdata(pdev); + + usb_remove_phy(&phy->phy); + return 0; +} + +static const struct of_device_id qca_uni_ss_id_table[] = { + { .compatible = "qca,uni-ssphy" }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, qca_uni_ss_id_table); + +static int qca_uni_ss_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct device_node *np = pdev->dev.of_node; + struct qca_uni_ss_phy *phy; + int ret; + + match = of_match_device(qca_uni_ss_id_table, &pdev->dev); + if (!match) + return -ENODEV; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + platform_set_drvdata(pdev, phy); + phy->dev = &pdev->dev; + + ret = qca_uni_ss_get_resources(pdev, phy); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request resources: %d\n", ret); + return ret; + } + + phy->phy.dev = phy->dev; + phy->phy.label = "qca-uni-ssphy"; + phy->phy.init = qca_uni_ss_phy_init; + phy->phy.shutdown = qca_uni_ss_phy_shutdown; + phy->phy.type = USB_PHY_TYPE_USB3; + + ret = usb_add_phy_dev(&phy->phy); + return ret; +} + +static struct platform_driver qca_uni_ss_driver = { + .probe = qca_uni_ss_probe, + .remove = qca_uni_ss_remove, + .driver = { + .name = "qca-uni-ssphy", + .owner = THIS_MODULE, + .of_match_table = qca_uni_ss_id_table, + }, +}; + +module_platform_driver(qca_uni_ss_driver); + +MODULE_ALIAS("platform:qca-uni-ssphy"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("USB3 QCA UNI SSPHY driver");