From patchwork Sat May 5 02:15:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 10381901 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 767EB60467 for ; Sat, 5 May 2018 02:15:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6635729613 for ; Sat, 5 May 2018 02:15:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 57E7D29618; Sat, 5 May 2018 02:15:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 28C0A29613 for ; Sat, 5 May 2018 02:15:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751961AbeEECPR (ORCPT ); Fri, 4 May 2018 22:15:17 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:61626 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751736AbeEECPP (ORCPT ); Fri, 4 May 2018 22:15:15 -0400 X-UUID: a7d2e701f39e49a9b493ecc19862824f-20180505 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1205178517; Sat, 05 May 2018 10:15:12 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Sat, 5 May 2018 10:15:09 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Sat, 5 May 2018 10:15:09 +0800 From: Chunfeng Yun To: Kishon Vijay Abraham I CC: Matthias Brugger , Rob Herring , Mark Rutland , Ian Campbell , Ryder Lee , Chunfeng Yun , , , , , Subject: [PATCH v2 2/2] phy: mediatek: add XS-PHY driver Date: Sat, 5 May 2018 10:15:06 +0800 Message-ID: <1525486506-19301-3-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1525486506-19301-1-git-send-email-chunfeng.yun@mediatek.com> References: <1525486506-19301-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Support XS-PHY for MediaTek SoCs with USB3.1 GEN2 controller Signed-off-by: Chunfeng Yun --- drivers/phy/mediatek/Kconfig | 9 + drivers/phy/mediatek/Makefile | 1 + drivers/phy/mediatek/phy-mtk-xsphy.c | 600 ++++++++++++++++++++++++++++++++++ 3 files changed, 610 insertions(+) create mode 100644 drivers/phy/mediatek/phy-mtk-xsphy.c diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig index 88ab4e2..8857d00 100644 --- a/drivers/phy/mediatek/Kconfig +++ b/drivers/phy/mediatek/Kconfig @@ -12,3 +12,12 @@ config PHY_MTK_TPHY different banks layout, the T-PHY with shared banks between multi-ports is first version, otherwise is second veriosn, so you can easily distinguish them by banks layout. + +config PHY_MTK_XSPHY + tristate "MediaTek XS-PHY Driver" + depends on ARCH_MEDIATEK && OF + select GENERIC_PHY + help + Enable this to support the SuperSpeedPlus XS-PHY transceiver for + USB3.1 GEN2 controllers on MediaTek chips. The driver supports + multiple USB2.0, USB3.1 GEN2 ports. diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile index 1bdab14..ee49edc 100644 --- a/drivers/phy/mediatek/Makefile +++ b/drivers/phy/mediatek/Makefile @@ -4,3 +4,4 @@ # obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o +obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o diff --git a/drivers/phy/mediatek/phy-mtk-xsphy.c b/drivers/phy/mediatek/phy-mtk-xsphy.c new file mode 100644 index 0000000..020cd02 --- /dev/null +++ b/drivers/phy/mediatek/phy-mtk-xsphy.c @@ -0,0 +1,600 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MediaTek USB3.1 gen2 xsphy Driver + * + * Copyright (c) 2018 MediaTek Inc. + * Author: Chunfeng Yun + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* u2 phy banks */ +#define SSUSB_SIFSLV_MISC 0x000 +#define SSUSB_SIFSLV_U2FREQ 0x100 +#define SSUSB_SIFSLV_U2PHY_COM 0x300 + +/* u3 phy shared banks */ +#define SSPXTP_SIFSLV_DIG_GLB 0x000 +#define SSPXTP_SIFSLV_PHYA_GLB 0x100 + +/* u3 phy banks */ +#define SSPXTP_SIFSLV_DIG_LN_TOP 0x000 +#define SSPXTP_SIFSLV_DIG_LN_TX0 0x100 +#define SSPXTP_SIFSLV_DIG_LN_RX0 0x200 +#define SSPXTP_SIFSLV_DIG_LN_DAIF 0x300 +#define SSPXTP_SIFSLV_PHYA_LN 0x400 + +#define XSP_U2FREQ_FMCR0 ((SSUSB_SIFSLV_U2FREQ) + 0x00) +#define P2F_RG_FREQDET_EN BIT(24) +#define P2F_RG_CYCLECNT GENMASK(23, 0) +#define P2F_RG_CYCLECNT_VAL(x) ((P2F_RG_CYCLECNT) & (x)) + +#define XSP_U2FREQ_MMONR0 ((SSUSB_SIFSLV_U2FREQ) + 0x0c) + +#define XSP_U2FREQ_FMMONR1 ((SSUSB_SIFSLV_U2FREQ) + 0x10) +#define P2F_RG_FRCK_EN BIT(8) +#define P2F_USB_FM_VALID BIT(0) + +#define XSP_USBPHYACR0 ((SSUSB_SIFSLV_U2PHY_COM) + 0x00) +#define P2A0_RG_INTR_EN BIT(5) + +#define XSP_USBPHYACR1 ((SSUSB_SIFSLV_U2PHY_COM) + 0x04) +#define P2A1_RG_INTR_CAL GENMASK(23, 19) +#define P2A1_RG_INTR_CAL_VAL(x) ((0x1f & (x)) << 19) +#define P2A1_RG_VRT_SEL GENMASK(14, 12) +#define P2A1_RG_VRT_SEL_VAL(x) ((0x7 & (x)) << 12) +#define P2A1_RG_TERM_SEL GENMASK(10, 8) +#define P2A1_RG_TERM_SEL_VAL(x) ((0x7 & (x)) << 8) + +#define XSP_USBPHYACR5 ((SSUSB_SIFSLV_U2PHY_COM) + 0x014) +#define P2A5_RG_HSTX_SRCAL_EN BIT(15) +#define P2A5_RG_HSTX_SRCTRL GENMASK(14, 12) +#define P2A5_RG_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12) + +#define XSP_USBPHYACR6 ((SSUSB_SIFSLV_U2PHY_COM) + 0x018) +#define P2A6_RG_BC11_SW_EN BIT(23) +#define P2A6_RG_OTG_VBUSCMP_EN BIT(20) + +#define XSP_U2PHYDTM1 ((SSUSB_SIFSLV_U2PHY_COM) + 0x06C) +#define P2D_FORCE_IDDIG BIT(9) +#define P2D_RG_VBUSVALID BIT(5) +#define P2D_RG_SESSEND BIT(4) +#define P2D_RG_AVALID BIT(2) +#define P2D_RG_IDDIG BIT(1) + +#define SSPXTP_PHYA_GLB_00 ((SSPXTP_SIFSLV_PHYA_GLB) + 0x00) +#define RG_XTP_GLB_BIAS_INTR_CTRL GENMASK(21, 16) +#define RG_XTP_GLB_BIAS_INTR_CTRL_VAL(x) ((0x3f & (x)) << 16) + +#define SSPXTP_PHYA_LN_04 ((SSPXTP_SIFSLV_PHYA_LN) + 0x04) +#define RG_XTP_LN0_TX_IMPSEL GENMASK(4, 0) +#define RG_XTP_LN0_TX_IMPSEL_VAL(x) (0x1f & (x)) + +#define SSPXTP_PHYA_LN_14 ((SSPXTP_SIFSLV_PHYA_LN) + 0x014) +#define RG_XTP_LN0_RX_IMPSEL GENMASK(4, 0) +#define RG_XTP_LN0_RX_IMPSEL_VAL(x) (0x1f & (x)) + +#define XSP_REF_CLK 26 /* MHZ */ +#define XSP_SLEW_RATE_COEF 17 +#define XSP_SR_COEF_DIVISOR 1000 +#define XSP_FM_DET_CYCLE_CNT 1024 + +struct xsphy_instance { + struct phy *phy; + void __iomem *port_base; + struct clk *ref_clk; /* reference clock of anolog phy */ + u32 index; + u32 type; + /* only for HQA test */ + int efuse_intr; + int efuse_tx_imp; + int efuse_rx_imp; + /* u2 eye diagram */ + int eye_src; + int eye_vrt; + int eye_term; +}; + +struct mtk_xsphy { + struct device *dev; + void __iomem *glb_base; /* only shared u3 sif */ + struct xsphy_instance **phys; + int nphys; + int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */ + int src_coef; /* coefficient for slew rate calibrate */ +}; + +static void u2_phy_slew_rate_calibrate(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + void __iomem *pbase = inst->port_base; + int calib_val; + int fm_out; + u32 tmp; + + /* use force value */ + if (inst->eye_src) + return; + + /* enable USB ring oscillator */ + tmp = readl(pbase + XSP_USBPHYACR5); + tmp |= P2A5_RG_HSTX_SRCAL_EN; + writel(tmp, pbase + XSP_USBPHYACR5); + udelay(1); /* wait clock stable */ + + /* enable free run clock */ + tmp = readl(pbase + XSP_U2FREQ_FMMONR1); + tmp |= P2F_RG_FRCK_EN; + writel(tmp, pbase + XSP_U2FREQ_FMMONR1); + + /* set cycle count as 1024 */ + tmp = readl(pbase + XSP_U2FREQ_FMCR0); + tmp &= ~(P2F_RG_CYCLECNT); + tmp |= P2F_RG_CYCLECNT_VAL(XSP_FM_DET_CYCLE_CNT); + writel(tmp, pbase + XSP_U2FREQ_FMCR0); + + /* enable frequency meter */ + tmp = readl(pbase + XSP_U2FREQ_FMCR0); + tmp |= P2F_RG_FREQDET_EN; + writel(tmp, pbase + XSP_U2FREQ_FMCR0); + + /* ignore return value */ + readl_poll_timeout(pbase + XSP_U2FREQ_FMMONR1, tmp, + (tmp & P2F_USB_FM_VALID), 10, 200); + + fm_out = readl(pbase + XSP_U2FREQ_MMONR0); + + /* disable frequency meter */ + tmp = readl(pbase + XSP_U2FREQ_FMCR0); + tmp &= ~P2F_RG_FREQDET_EN; + writel(tmp, pbase + XSP_U2FREQ_FMCR0); + + /* disable free run clock */ + tmp = readl(pbase + XSP_U2FREQ_FMMONR1); + tmp &= ~P2F_RG_FRCK_EN; + writel(tmp, pbase + XSP_U2FREQ_FMMONR1); + + if (fm_out) { + /* (1024 / FM_OUT) x reference clock frequency x coefficient */ + tmp = xsphy->src_ref_clk * xsphy->src_coef; + tmp = (tmp * XSP_FM_DET_CYCLE_CNT) / fm_out; + calib_val = DIV_ROUND_CLOSEST(tmp, XSP_SR_COEF_DIVISOR); + } else { + /* if FM detection fail, set default value */ + calib_val = 3; + } + dev_dbg(xsphy->dev, "phy.%d, fm_out:%d, calib:%d (clk:%d, coef:%d)\n", + inst->index, fm_out, calib_val, + xsphy->src_ref_clk, xsphy->src_coef); + + /* set HS slew rate */ + tmp = readl(pbase + XSP_USBPHYACR5); + tmp &= ~P2A5_RG_HSTX_SRCTRL; + tmp |= P2A5_RG_HSTX_SRCTRL_VAL(calib_val); + writel(tmp, pbase + XSP_USBPHYACR5); + + /* disable USB ring oscillator */ + tmp = readl(pbase + XSP_USBPHYACR5); + tmp &= ~P2A5_RG_HSTX_SRCAL_EN; + writel(tmp, pbase + XSP_USBPHYACR5); +} + +static void u2_phy_instance_init(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + void __iomem *pbase = inst->port_base; + u32 tmp; + + /* DP/DM BC1.1 path Disable */ + tmp = readl(pbase + XSP_USBPHYACR6); + tmp &= ~P2A6_RG_BC11_SW_EN; + writel(tmp, pbase + XSP_USBPHYACR6); + + tmp = readl(pbase + XSP_USBPHYACR0); + tmp |= P2A0_RG_INTR_EN; + writel(tmp, pbase + XSP_USBPHYACR0); +} + +static void u2_phy_instance_power_on(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + void __iomem *pbase = inst->port_base; + u32 index = inst->index; + u32 tmp; + + tmp = readl(pbase + XSP_USBPHYACR6); + tmp |= P2A6_RG_OTG_VBUSCMP_EN; + writel(tmp, pbase + XSP_USBPHYACR6); + + tmp = readl(pbase + XSP_U2PHYDTM1); + tmp |= P2D_RG_VBUSVALID | P2D_RG_AVALID; + tmp &= ~P2D_RG_SESSEND; + writel(tmp, pbase + XSP_U2PHYDTM1); + + dev_dbg(xsphy->dev, "%s(%d)\n", __func__, index); +} + +static void u2_phy_instance_power_off(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + void __iomem *pbase = inst->port_base; + u32 index = inst->index; + u32 tmp; + + tmp = readl(pbase + XSP_USBPHYACR6); + tmp &= ~P2A6_RG_OTG_VBUSCMP_EN; + writel(tmp, pbase + XSP_USBPHYACR6); + + tmp = readl(pbase + XSP_U2PHYDTM1); + tmp &= ~(P2D_RG_VBUSVALID | P2D_RG_AVALID); + tmp |= P2D_RG_SESSEND; + writel(tmp, pbase + XSP_U2PHYDTM1); + + dev_dbg(xsphy->dev, "%s(%d)\n", __func__, index); +} + +static void u2_phy_instance_set_mode(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst, + enum phy_mode mode) +{ + u32 tmp; + + tmp = readl(inst->port_base + XSP_U2PHYDTM1); + switch (mode) { + case PHY_MODE_USB_DEVICE: + tmp |= P2D_FORCE_IDDIG | P2D_RG_IDDIG; + break; + case PHY_MODE_USB_HOST: + tmp |= P2D_FORCE_IDDIG; + tmp &= ~P2D_RG_IDDIG; + break; + case PHY_MODE_USB_OTG: + tmp &= ~(P2D_FORCE_IDDIG | P2D_RG_IDDIG); + break; + default: + return; + } + writel(tmp, inst->port_base + XSP_U2PHYDTM1); +} + +static void phy_parse_property(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + struct device *dev = &inst->phy->dev; + + switch (inst->type) { + case PHY_TYPE_USB2: + device_property_read_u32(dev, "mediatek,efuse-intr", + &inst->efuse_intr); + device_property_read_u32(dev, "mediatek,eye-src", + &inst->eye_src); + device_property_read_u32(dev, "mediatek,eye-vrt", + &inst->eye_vrt); + device_property_read_u32(dev, "mediatek,eye-term", + &inst->eye_term); + dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d\n", + inst->efuse_intr, inst->eye_src, + inst->eye_vrt, inst->eye_term); + break; + case PHY_TYPE_USB3: + device_property_read_u32(dev, "mediatek,efuse-intr", + &inst->efuse_intr); + device_property_read_u32(dev, "mediatek,efuse-tx-imp", + &inst->efuse_tx_imp); + device_property_read_u32(dev, "mediatek,efuse-rx-imp", + &inst->efuse_rx_imp); + dev_dbg(dev, "intr:%d, tx-imp:%d, rx-imp:%d\n", + inst->efuse_intr, inst->efuse_tx_imp, + inst->efuse_rx_imp); + break; + default: + dev_err(xsphy->dev, "incompatible phy type\n"); + return; + } +} + +static void u2_phy_props_set(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + void __iomem *pbase = inst->port_base; + u32 tmp; + + if (inst->efuse_intr) { + tmp = readl(pbase + XSP_USBPHYACR1); + tmp &= ~P2A1_RG_INTR_CAL; + tmp |= P2A1_RG_INTR_CAL_VAL(inst->efuse_intr); + writel(tmp, pbase + XSP_USBPHYACR1); + } + + if (inst->eye_src) { + tmp = readl(pbase + XSP_USBPHYACR5); + tmp &= ~P2A5_RG_HSTX_SRCTRL; + tmp |= P2A5_RG_HSTX_SRCTRL_VAL(inst->eye_src); + writel(tmp, pbase + XSP_USBPHYACR5); + } + + if (inst->eye_vrt) { + tmp = readl(pbase + XSP_USBPHYACR1); + tmp &= ~P2A1_RG_VRT_SEL; + tmp |= P2A1_RG_VRT_SEL_VAL(inst->eye_vrt); + writel(tmp, pbase + XSP_USBPHYACR1); + } + + if (inst->eye_term) { + tmp = readl(pbase + XSP_USBPHYACR1); + tmp &= ~P2A1_RG_TERM_SEL; + tmp |= P2A1_RG_TERM_SEL_VAL(inst->eye_term); + writel(tmp, pbase + XSP_USBPHYACR1); + } +} + +static void u3_phy_props_set(struct mtk_xsphy *xsphy, + struct xsphy_instance *inst) +{ + void __iomem *pbase = inst->port_base; + u32 tmp; + + if (inst->efuse_intr) { + tmp = readl(xsphy->glb_base + SSPXTP_PHYA_GLB_00); + tmp &= ~RG_XTP_GLB_BIAS_INTR_CTRL; + tmp |= RG_XTP_GLB_BIAS_INTR_CTRL_VAL(inst->efuse_intr); + writel(tmp, xsphy->glb_base + SSPXTP_PHYA_GLB_00); + } + + if (inst->efuse_tx_imp) { + tmp = readl(pbase + SSPXTP_PHYA_LN_04); + tmp &= ~RG_XTP_LN0_TX_IMPSEL; + tmp |= RG_XTP_LN0_TX_IMPSEL_VAL(inst->efuse_tx_imp); + writel(tmp, pbase + SSPXTP_PHYA_LN_04); + } + + if (inst->efuse_rx_imp) { + tmp = readl(pbase + SSPXTP_PHYA_LN_14); + tmp &= ~RG_XTP_LN0_RX_IMPSEL; + tmp |= RG_XTP_LN0_RX_IMPSEL_VAL(inst->efuse_rx_imp); + writel(tmp, pbase + SSPXTP_PHYA_LN_14); + } +} + +static int mtk_phy_init(struct phy *phy) +{ + struct xsphy_instance *inst = phy_get_drvdata(phy); + struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent); + int ret; + + ret = clk_prepare_enable(inst->ref_clk); + if (ret) { + dev_err(xsphy->dev, "failed to enable ref_clk\n"); + return ret; + } + + switch (inst->type) { + case PHY_TYPE_USB2: + u2_phy_instance_init(xsphy, inst); + u2_phy_props_set(xsphy, inst); + break; + case PHY_TYPE_USB3: + u3_phy_props_set(xsphy, inst); + break; + default: + dev_err(xsphy->dev, "incompatible phy type\n"); + clk_disable_unprepare(inst->ref_clk); + return -EINVAL; + } + + return 0; +} + +static int mtk_phy_power_on(struct phy *phy) +{ + struct xsphy_instance *inst = phy_get_drvdata(phy); + struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent); + + if (inst->type == PHY_TYPE_USB2) { + u2_phy_instance_power_on(xsphy, inst); + u2_phy_slew_rate_calibrate(xsphy, inst); + } + + return 0; +} + +static int mtk_phy_power_off(struct phy *phy) +{ + struct xsphy_instance *inst = phy_get_drvdata(phy); + struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent); + + if (inst->type == PHY_TYPE_USB2) + u2_phy_instance_power_off(xsphy, inst); + + return 0; +} + +static int mtk_phy_exit(struct phy *phy) +{ + struct xsphy_instance *inst = phy_get_drvdata(phy); + + clk_disable_unprepare(inst->ref_clk); + return 0; +} + +static int mtk_phy_set_mode(struct phy *phy, enum phy_mode mode) +{ + struct xsphy_instance *inst = phy_get_drvdata(phy); + struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent); + + if (inst->type == PHY_TYPE_USB2) + u2_phy_instance_set_mode(xsphy, inst, mode); + + return 0; +} + +static struct phy *mtk_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct mtk_xsphy *xsphy = dev_get_drvdata(dev); + struct xsphy_instance *inst = NULL; + struct device_node *phy_np = args->np; + int index; + + if (args->args_count != 1) { + dev_err(dev, "invalid number of cells in 'phy' property\n"); + return ERR_PTR(-EINVAL); + } + + for (index = 0; index < xsphy->nphys; index++) + if (phy_np == xsphy->phys[index]->phy->dev.of_node) { + inst = xsphy->phys[index]; + break; + } + + if (!inst) { + dev_err(dev, "failed to find appropriate phy\n"); + return ERR_PTR(-EINVAL); + } + + inst->type = args->args[0]; + if (!(inst->type == PHY_TYPE_USB2 || + inst->type == PHY_TYPE_USB3)) { + dev_err(dev, "unsupported phy type: %d\n", inst->type); + return ERR_PTR(-EINVAL); + } + + phy_parse_property(xsphy, inst); + + return inst->phy; +} + +static const struct phy_ops mtk_xsphy_ops = { + .init = mtk_phy_init, + .exit = mtk_phy_exit, + .power_on = mtk_phy_power_on, + .power_off = mtk_phy_power_off, + .set_mode = mtk_phy_set_mode, + .owner = THIS_MODULE, +}; + +static const struct of_device_id mtk_xsphy_id_table[] = { + { .compatible = "mediatek,xsphy", }, + { }, +}; +MODULE_DEVICE_TABLE(of, mtk_xsphy_id_table); + +static int mtk_xsphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *child_np; + struct phy_provider *provider; + struct resource *glb_res; + struct mtk_xsphy *xsphy; + struct resource res; + int port, retval; + + xsphy = devm_kzalloc(dev, sizeof(*xsphy), GFP_KERNEL); + if (!xsphy) + return -ENOMEM; + + xsphy->nphys = of_get_child_count(np); + xsphy->phys = devm_kcalloc(dev, xsphy->nphys, + sizeof(*xsphy->phys), GFP_KERNEL); + if (!xsphy->phys) + return -ENOMEM; + + xsphy->dev = dev; + platform_set_drvdata(pdev, xsphy); + + glb_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + /* optional, may not exist if no u3 phys */ + if (glb_res) { + /* get banks shared by multiple u3 phys */ + xsphy->glb_base = devm_ioremap_resource(dev, glb_res); + if (IS_ERR(xsphy->glb_base)) { + dev_err(dev, "failed to remap glb regs\n"); + return PTR_ERR(xsphy->glb_base); + } + } + + xsphy->src_ref_clk = XSP_REF_CLK; + xsphy->src_coef = XSP_SLEW_RATE_COEF; + /* update parameters of slew rate calibrate if exist */ + device_property_read_u32(dev, "mediatek,src-ref-clk-mhz", + &xsphy->src_ref_clk); + device_property_read_u32(dev, "mediatek,src-coef", &xsphy->src_coef); + + port = 0; + for_each_child_of_node(np, child_np) { + struct xsphy_instance *inst; + struct phy *phy; + + inst = devm_kzalloc(dev, sizeof(*inst), GFP_KERNEL); + if (!inst) { + retval = -ENOMEM; + goto put_child; + } + + xsphy->phys[port] = inst; + + phy = devm_phy_create(dev, child_np, &mtk_xsphy_ops); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create phy\n"); + retval = PTR_ERR(phy); + goto put_child; + } + + retval = of_address_to_resource(child_np, 0, &res); + if (retval) { + dev_err(dev, "failed to get address resource(id-%d)\n", + port); + goto put_child; + } + + inst->port_base = devm_ioremap_resource(&phy->dev, &res); + if (IS_ERR(inst->port_base)) { + dev_err(dev, "failed to remap phy regs\n"); + retval = PTR_ERR(inst->port_base); + goto put_child; + } + + inst->phy = phy; + inst->index = port; + phy_set_drvdata(phy, inst); + port++; + + inst->ref_clk = devm_clk_get(&phy->dev, "ref"); + if (IS_ERR(inst->ref_clk)) { + dev_err(dev, "failed to get ref_clk(id-%d)\n", port); + retval = PTR_ERR(inst->ref_clk); + goto put_child; + } + } + + provider = devm_of_phy_provider_register(dev, mtk_phy_xlate); + return PTR_ERR_OR_ZERO(provider); + +put_child: + of_node_put(child_np); + return retval; +} + +static struct platform_driver mtk_xsphy_driver = { + .probe = mtk_xsphy_probe, + .driver = { + .name = "mtk-xsphy", + .of_match_table = mtk_xsphy_id_table, + }, +}; + +module_platform_driver(mtk_xsphy_driver); + +MODULE_AUTHOR("Chunfeng Yun "); +MODULE_DESCRIPTION("MediaTek USB XS-PHY driver"); +MODULE_LICENSE("GPL v2");