[PATCH v2 3/5] usb: phy: add usb3.0 phy driver for mt65xx SoCs
chunfeng yun
chunfeng.yun at mediatek.com
Mon Jul 20 08:41:19 PDT 2015
On Fri, 2015-07-10 at 08:42 +0200, Sascha Hauer wrote:
> On Wed, Jul 08, 2015 at 05:41:05PM +0800, Chunfeng Yun wrote:
> > Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>
> > ---
> > drivers/usb/phy/Kconfig | 10 +
> > drivers/usb/phy/Makefile | 1 +
> > drivers/usb/phy/phy-mt65xx-usb3.c | 856 ++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 867 insertions(+)
> > create mode 100644 drivers/usb/phy/phy-mt65xx-usb3.c
> >
> > diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> > index 869c0cfcad..66ded00 100644
> > --- a/drivers/usb/phy/Kconfig
> > +++ b/drivers/usb/phy/Kconfig
> > @@ -152,6 +152,16 @@ config USB_MSM_OTG
> > This driver is not supported on boards like trout which
> > has an external PHY.
> >
> > +config USB_MT65XX_USB3_PHY
> > + tristate "Mediatek USB3.0 PHY controller Driver"
> > + depends on ARCH_MEDIATEK || COMPILE_TEST
> > + select USB_PHY
> > + help
> > + Say 'Y' here to add support for Mediatek USB3.0 PHY driver
> > + for mt65xx SoCs. it supports two usb2.0 ports and
> > + one usb3.0 port.
> > + To compile this driver as a module, choose M here
> > +
> > config USB_MV_OTG
> > tristate "Marvell USB OTG support"
> > depends on USB_EHCI_MV && USB_MV_UDC && PM
> > diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
> > index e36ab1d..414ef57 100644
> > --- a/drivers/usb/phy/Makefile
> > +++ b/drivers/usb/phy/Makefile
> > @@ -20,6 +20,7 @@ obj-$(CONFIG_USB_EHCI_TEGRA) += phy-tegra-usb.o
> > obj-$(CONFIG_USB_GPIO_VBUS) += phy-gpio-vbus-usb.o
> > obj-$(CONFIG_USB_ISP1301) += phy-isp1301.o
> > obj-$(CONFIG_USB_MSM_OTG) += phy-msm-usb.o
> > +obj-$(CONFIG_USB_MT65XX_USB3_PHY) += phy-mt65xx-usb3.o
> > obj-$(CONFIG_USB_MV_OTG) += phy-mv-usb.o
> > obj-$(CONFIG_USB_MXS_PHY) += phy-mxs-usb.o
> > obj-$(CONFIG_USB_RCAR_PHY) += phy-rcar-usb.o
> > diff --git a/drivers/usb/phy/phy-mt65xx-usb3.c b/drivers/usb/phy/phy-mt65xx-usb3.c
> > new file mode 100644
> > index 0000000..38ee6f3
> > --- /dev/null
> > +++ b/drivers/usb/phy/phy-mt65xx-usb3.c
> > @@ -0,0 +1,856 @@
> > +/*
> > + * Copyright (c) 2015 MediaTek Inc.
> > + * Author: Chunfeng.Yun <chunfeng.yun at mediatek.com>
> > + *
> > + * This software is licensed under the terms of the GNU General Public
> > + * License version 2, as published by the Free Software Foundation, and
> > + * may be copied, distributed, and modified under those terms.
> > + *
> > + * 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/delay.h>
> > +#include <linux/err.h>
> > +#include <linux/export.h>
> > +#include <linux/gpio.h>
> > +#include <linux/io.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/mfd/syscon.h>
> > +#include <linux/module.h>
> > +#include <linux/of_address.h>
> > +#include <linux/of_device.h>
> > +#include <linux/of_gpio.h>
> > +#include <linux/of.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/regmap.h>
> > +#include <linux/regulator/consumer.h>
> > +#include <linux/resource.h>
> > +#include <linux/slab.h>
> > +#include <linux/usb/of.h>
> > +#include <linux/usb/otg.h>
> > +#include <linux/usb/phy.h>
> > +
> > +/*
> > + * relative to MAC base address
> > + */
> > +#define SSUSB_USB3_MAC_CSR_BASE (0x1400)
> > +#define SSUSB_USB3_SYS_CSR_BASE (0x1400)
> > +#define SSUSB_USB2_CSR_BASE (0x2400)
>
> Please drop the unnecessary braces.
>
ok
> > +
> > +/*
> > + * for sifslv1 register
> > + * relative to USB3_SIF_BASE base address
> > + */
> > +#define SSUSB_SIFSLV_IPPC_BASE (0x700)
> > +
> > +/*
> > + * for sifslv2 register
> > + * relative to USB3_SIF_BASE base address
> > + */
> > +#define SSUSB_SIFSLV_U2PHY_COM_BASE (0x10800)
> > +#define SSUSB_SIFSLV_U3PHYD_BASE (0x10900)
> > +#define SSUSB_SIFSLV_U2FREQ_BASE (0x10f00)
> > +#define SSUSB_USB30_PHYA_SIV_B_BASE (0x10b00)
> > +#define SSUSB_SIFSLV_U3PHYA_DA_BASE (0x10c00)
> > +#define SSUSB_SIFSLV_SPLLC (0x10000)
> > +
> > +/*port1 refs. +0x800(refer to port0)*/
> > +#define U3P_PORT_OFFSET (0x800) /*based on port0 */
> > +#define U3P_PHY_BASE(index) ((U3P_PORT_OFFSET) * (index))
>
> According to my datasheet port(idx) base is at:
>
> sif_base + 0x800 + 0x100 * idx
>
> Am I missing something here?
Maybe, ssusb_sifslv_u2_phy_com_T28_Xp etc(X = 1,2,3,4)
and their interval is 0x800
> > +
> > +#define U3P_IP_PW_CTRL0 (SSUSB_SIFSLV_IPPC_BASE + 0x0000)
> > +#define CTRL0_IP_SW_RST (0x1 << 0)
> > +
> > +#define U3P_IP_PW_CTRL1 (SSUSB_SIFSLV_IPPC_BASE + 0x0004)
> > +#define CTRL1_IP_HOST_PDN (0x1 << 0)
> > +
> > +#define U3P_IP_PW_CTRL2 (SSUSB_SIFSLV_IPPC_BASE + 0x0008)
> > +#define CTRL2_IP_DEV_PDN (0x1 << 0)
> > +
> > +#define U3P_IP_PW_STS1 (SSUSB_SIFSLV_IPPC_BASE + 0x0010)
> > +#define STS1_IP_SLEEP_STS (0x1 << 30)
> > +#define STS1_U3_MAC_RST (0x1 << 16)
> > +#define STS1_SYS125_RST (0x1 << 10)
> > +#define STS1_REF_RST (0x1 << 8)
> > +#define STS1_SYSPLL_STABLE (0x1 << 0)
> > +
> > +#define U3P_IP_PW_STS2 (SSUSB_SIFSLV_IPPC_BASE + 0x0014)
> > +#define STS2_U2_MAC_RST (0x1 << 0)
> > +
> > +#define U3P_IP_XHCI_CAP (SSUSB_SIFSLV_IPPC_BASE + 0x0024)
> > +#define CAP_U3_PORT_NUM(p) ((p) & 0xff)
> > +#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff)
> > +
> > +#define U3P_U3_CTRL_0P (SSUSB_SIFSLV_IPPC_BASE + 0x0030)
> > +#define CTRL_U3_PORT_HOST_SEL (0x1 << 2)
> > +#define CTRL_U3_PORT_PDN (0x1 << 1)
> > +#define CTRL_U3_PORT_DIS (0x1 << 0)
> > +
> > +#define U3P_U2_CTRL_0P (SSUSB_SIFSLV_IPPC_BASE + 0x0050)
> > +#define CTRL_U2_PORT_HOST_SEL (0x1 << 2)
> > +#define CTRL_U2_PORT_PDN (0x1 << 1)
> > +#define CTRL_U2_PORT_DIS (0x1 << 0)
> > +
> > +#define U3P_U3_CTRL(p) (U3P_U3_CTRL_0P + ((p) * 0x08))
> > +#define U3P_U2_CTRL(p) (U3P_U2_CTRL_0P + ((p) * 0x08))
> > +
> > +#define U3P_USBPHYACR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0000)
> > +#define PA0_RG_U2PLL_FORCE_ON (0x1 << 15)
> > +
> > +#define U3P_USBPHYACR2 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0008)
> > +#define PA2_RG_SIF_U2PLL_FORCE_EN (0x1 << 18)
> > +
> > +#define U3P_USBPHYACR5 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0014)
> > +#define PA5_RG_U2_HSTX_SRCTRL (0x7 << 12)
> > +#define PA5_RG_U2_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12)
> > +#define PA5_RG_U2_HS_100U_U3_EN (0x1 << 11)
> > +
> > +#define U3P_USBPHYACR6 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0018)
> > +#define PA6_RG_U2_ISO_EN (0x1 << 31)
> > +#define PA6_RG_U2_BC11_SW_EN (0x1 << 23)
> > +#define PA6_RG_U2_OTG_VBUSCMP_EN (0x1 << 20)
> > +
> > +#define U3P_U2PHYACR4 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0020)
> > +#define P2C_RG_USB20_GPIO_CTL (0x1 << 9)
> > +#define P2C_USB20_GPIO_MODE (0x1 << 8)
> > +#define P2C_U2_GPIO_CTR_MSK (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)
> > +
> > +#define U3D_U2PHYDCR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0060)
> > +#define P2C_RG_SIF_U2PLL_FORCE_ON (0x1 << 24)
> > +
> > +#define U3P_U2PHYDTM0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0068)
> > +#define P2C_FORCE_UART_EN (0x1 << 26)
> > +#define P2C_FORCE_DATAIN (0x1 << 23)
> > +#define P2C_FORCE_DM_PULLDOWN (0x1 << 21)
> > +#define P2C_FORCE_DP_PULLDOWN (0x1 << 20)
> > +#define P2C_FORCE_XCVRSEL (0x1 << 19)
> > +#define P2C_FORCE_SUSPENDM (0x1 << 18)
> > +#define P2C_FORCE_TERMSEL (0x1 << 17)
> > +#define P2C_RG_DATAIN (0xf << 10)
> > +#define P2C_RG_DATAIN_VAL(x) ((0xf & (x)) << 10)
> > +#define P2C_RG_DMPULLDOWN (0x1 << 7)
> > +#define P2C_RG_DPPULLDOWN (0x1 << 6)
> > +#define P2C_RG_XCVRSEL (0x3 << 4)
> > +#define P2C_RG_XCVRSEL_VAL(x) ((0x3 & (x)) << 4)
> > +#define P2C_RG_SUSPENDM (0x1 << 3)
> > +#define P2C_RG_TERMSEL (0x1 << 2)
> > +#define P2C_DTM0_PART_MASK \
> > + (P2C_FORCE_DATAIN | P2C_FORCE_DM_PULLDOWN | \
> > + P2C_FORCE_DP_PULLDOWN | P2C_FORCE_XCVRSEL | \
> > + P2C_FORCE_TERMSEL | P2C_RG_DMPULLDOWN | \
> > + P2C_RG_DPPULLDOWN | P2C_RG_TERMSEL)
> > +
> > +#define U3P_U2PHYDTM1 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x006C)
> > +#define P2C_RG_UART_EN (0x1 << 16)
> > +#define P2C_RG_VBUSVALID (0x1 << 5)
> > +#define P2C_RG_SESSEND (0x1 << 4)
> > +#define P2C_RG_AVALID (0x1 << 2)
> > +
> > +#define U3P_U3_PHYA_REG0 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0000)
> > +#define P3A_RG_U3_VUSB10_ON (1 << 5)
> > +
> > +#define U3P_U3_PHYA_REG6 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0018)
> > +#define P3A_RG_TX_EIDLE_CM (0xf << 28)
> > +#define P3A_RG_TX_EIDLE_CM_VAL(x) ((0xf & (x)) << 28)
> > +
> > +#define U3P_U3_PHYA_REG9 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0024)
> > +#define P3A_RG_RX_DAC_MUX (0x1f << 1)
> > +#define P3A_RG_RX_DAC_MUX_VAL(x) ((0x1f & (x)) << 1)
> > +
> > +#define U3P_U3PHYA_DA_REG0 (SSUSB_SIFSLV_U3PHYA_DA_BASE + 0x0)
> > +#define P3A_RG_XTAL_EXT_EN_U3 (0x3 << 10)
> > +#define P3A_RG_XTAL_EXT_EN_U3_VAL(x) ((0x3 & (x)) << 10)
> > +
> > +#define U3P_PHYD_CDR1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x5c)
> > +#define P3D_RG_CDR_BIR_LTD1 (0x1f << 24)
> > +#define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24)
> > +#define P3D_RG_CDR_BIR_LTD0 (0x1f << 8)
> > +#define P3D_RG_CDR_BIR_LTD0_VAL(x) ((0x1f & (x)) << 8)
> > +
> > +#define U3P_XTALCTL3 (SSUSB_SIFSLV_SPLLC + 0x18)
> > +#define XC3_RG_U3_XTAL_RX_PWD (0x1 << 9)
> > +#define XC3_RG_U3_FRC_XTAL_RX_PWD (0x1 << 8)
> > +
> > +#define U3P_UX_EXIT_LFPS_PARAM (SSUSB_USB3_MAC_CSR_BASE + 0x00A0)
> > +#define RX_UX_EXIT_REF (0xff << 8)
> > +#define RX_UX_EXIT_REF_VAL (0x3 << 8)
> > +
> > +#define U3P_REF_CLK_PARAM (SSUSB_USB3_MAC_CSR_BASE + 0x00B0)
> > +#define REF_CLK_1000NS (0xff << 0)
> > +#define REF_CLK_VAL_DEF (0xa << 0)
> > +
> > +#define U3P_LINK_PM_TIMER (SSUSB_USB3_SYS_CSR_BASE + 0x0208)
> > +#define PM_LC_TIMEOUT (0xf << 0)
> > +#define PM_LC_TIMEOUT_VAL (0x3 << 0)
> > +
> > +#define U3P_TIMING_PULSE_CTRL (SSUSB_USB3_SYS_CSR_BASE + 0x02B4)
> > +#define U3T_CNT_1US (0xff << 0)
> > +#define U3T_CNT_1US_VAL (0x3f << 0) /* 62.5MHz: 63 */
> > +
> > +#define U3P_U2_TIMING_PARAM (SSUSB_USB2_CSR_BASE + 0x0040)
> > +#define U2T_VAL_1US (0xff << 0)
> > +#define U2T_VAL_1US_VAL (0x3f << 0) /* 62.5MHz: 63 */
> > +
> > +
> > +#define PERI_WK_CTRL0 0x400
> > +#define UWK_CTL1_1P_LS_E (0x1 << 0)
> > +#define UWK_CTL1_1P_LS_C(x) (((x) & 0xf) << 1)
> > +#define UWK_CTR0_0P_LS_NE (0x1 << 7) /* negedge for 0p linestate*/
> > +#define UWK_CTR0_0P_LS_PE (0x1 << 8) /* posedge */
> > +
> > +#define PERI_WK_CTRL1 0x404
> > +#define UWK_CTL1_IS_P (0x1 << 6) /* polarity for ip sleep */
> > +#define UWK_CTL1_0P_LS_P (0x1 << 7)
> > +#define UWK_CTL1_IDDIG_P (0x1 << 9) /* polarity */
> > +#define UWK_CTL1_IDDIG_E (0x1 << 10) /* enable debounce */
> > +#define UWK_CTL1_IDDIG_C(x) (((x) & 0xf) << 11) /* cycle debounce */
> > +#define UWK_CTL1_0P_LS_E (0x1 << 20)
> > +#define UWK_CTL1_0P_LS_C(x) (((x) & 0xf) << 21)
> > +#define UWK_CTL1_IS_E (0x1 << 25)
> > +#define UWK_CTL1_IS_C(x) (((x) & 0xf) << 26)
> > +
> > +enum ssusb_wakeup_src {
> > + SSUSB_WK_IP_SLEEP = 1,
> > + SSUSB_WK_LINE_STATE = 2,
> > +};
> > +
> > +struct mt65xx_u3phy {
> > + struct usb_phy phy;
> > + struct device *dev;
> > + void __iomem *mac_base; /* only device-mac regs, exclude xhci's */
> > + void __iomem *sif_base; /* include sif & sif2 */
> > + struct regmap *pericfg;
> > + struct clk *wk_deb_p0; /* port0's wakeup debounce clock */
> > + struct clk *wk_deb_p1;
> > + struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
> > + int wakeup_src;
> > + int u2port_num;
> > +};
> > +
> > +
> > +static void u3p_writel(void __iomem *base, u32 offset, u32 data)
> > +{
> > + writel(data, base + offset);
> > +}
>
> Never ever name a function 'writel' that has the arguments reversed to
> the original writel function.
>
Remove it later
> > +
> > +static u32 u3p_readl(void __iomem *base, u32 offset)
> > +{
> > + return readl(base + offset);
> > +}
> > +
> > +static void u3p_setmsk(void __iomem *base, u32 offset, u32 msk)
> > +{
> > + void __iomem *addr = base + offset;
> > +
> > + writel((readl(addr) | msk), addr);
> > +}
> > +
> > +static void u3p_clrmsk(void __iomem *base, u32 offset, u32 msk)
> > +{
> > + void __iomem *addr = base + offset;
> > +
> > + writel((readl(addr) & ~msk), addr);
> > +}
> > +
> > +static void u3p_setval(void __iomem *base, u32 offset,
> > + u32 mask, u32 value)
> > +{
> > + void __iomem *addr = base + offset;
> > + unsigned int new_value;
> > +
> > + new_value = (readl(addr) & ~mask) | value;
> > + writel(new_value, addr);
> > +}
> > +
> > +static void phy_index_power_on(struct mt65xx_u3phy *u3phy, int index)
> > +{
> > + void __iomem *sif_base = u3phy->sif_base + U3P_PHY_BASE(index);
> > +
> > + if (!index) {
> > + /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
> > + u3p_setmsk(sif_base, U3P_U3_PHYA_REG0, P3A_RG_U3_VUSB10_ON);
> > + /* power domain iso disable */
> > + u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_ISO_EN);
> > + }
> > +
> > + /* switch to USB function. (system register, force ip into usb mode) */
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_UART_EN);
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_UART_EN);
> > + if (!index)
> > + u3p_clrmsk(sif_base, U3P_U2PHYACR4, P2C_U2_GPIO_CTR_MSK);
> > +
> > + /* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_SUSPENDM);
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM0,
> > + P2C_RG_XCVRSEL | P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
> > +
> > + /* DP/DM BC1.1 path Disable */
> > + u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_BC11_SW_EN);
> > + /* OTG Enable */
> > + u3p_setmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_OTG_VBUSCMP_EN);
> > + u3p_setval(sif_base, U3P_U3PHYA_DA_REG0, P3A_RG_XTAL_EXT_EN_U3,
> > + P3A_RG_XTAL_EXT_EN_U3_VAL(2));
> > + u3p_setval(sif_base, U3P_U3_PHYA_REG9, P3A_RG_RX_DAC_MUX,
> > + P3A_RG_RX_DAC_MUX_VAL(4));
> > +
> > + if (!index) {
> > + u3p_setmsk(sif_base, U3P_XTALCTL3, XC3_RG_U3_XTAL_RX_PWD);
> > + u3p_setmsk(sif_base, U3P_XTALCTL3, XC3_RG_U3_FRC_XTAL_RX_PWD);
> > + /* [mt8173]disable Change 100uA current from SSUSB */
> > + u3p_clrmsk(sif_base, U3P_USBPHYACR5, PA5_RG_U2_HS_100U_U3_EN);
> > + }
> > + u3p_setval(sif_base, U3P_U3_PHYA_REG6, P3A_RG_TX_EIDLE_CM,
> > + P3A_RG_TX_EIDLE_CM_VAL(0xe));
> > + u3p_setval(sif_base, U3P_PHYD_CDR1, P3D_RG_CDR_BIR_LTD0,
> > + P3D_RG_CDR_BIR_LTD0_VAL(0xc));
> > + u3p_setval(sif_base, U3P_PHYD_CDR1, P3D_RG_CDR_BIR_LTD1,
> > + P3D_RG_CDR_BIR_LTD1_VAL(0x3));
> > +
> > + udelay(800);
> > + u3p_setmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_VBUSVALID | P2C_RG_AVALID);
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_SESSEND);
> > +
> > + /* USB 2.0 slew rate calibration */
> > + u3p_setval(sif_base, U3P_USBPHYACR5, PA5_RG_U2_HSTX_SRCTRL,
> > + PA5_RG_U2_HSTX_SRCTRL_VAL(4));
> > +
> > + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> > +}
> > +
> > +static void phy_index_power_off(struct mt65xx_u3phy *u3phy, int index)
> > +{
> > + void __iomem *sif_base = u3phy->sif_base + U3P_PHY_BASE(index);
> > +
> > + /* switch to USB function. (system register, force ip into usb mode) */
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_UART_EN);
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_UART_EN);
>
> That's the same register sequence as above in power_on. Do you really
> need to do this twice or is this more something that should be done
> during initialization once?
>
I will put them into init function
> > + if (!index)
> > + u3p_clrmsk(sif_base, U3P_U2PHYACR4, P2C_U2_GPIO_CTR_MSK);
> > +
> > + u3p_setmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_SUSPENDM);
> > + u3p_setval(sif_base, U3P_U2PHYDTM0,
> > + P2C_RG_XCVRSEL, P2C_RG_XCVRSEL_VAL(1));
> > + u3p_setval(sif_base, U3P_U2PHYDTM0,
> > + P2C_RG_DATAIN, P2C_RG_DATAIN_VAL(0));
> > + u3p_setmsk(sif_base, U3P_U2PHYDTM0, P2C_DTM0_PART_MASK);
>
> That's four read/write accesses in a row which is really hard to read.
> This should really be something like:
>
> val = readl(sif_base + U3P_U2PHYDTM0);
> val &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN)
> val |= P2C_FORCE_SUSPENDM | P2C_RG_XCVRSEL_VAL(1);
> writel(val, sif_base + U3P_U2PHYDTM0);
>
> Those read/modify/write access functions often have the tendency to lead
> to inefficient code.
>
Sometimes the bits should be set by sequence, check it later.
> Generally review your register accesses. There are several bits that are
> cleared multiple times but never set, like:
>
> U3P_U2PHYDTM0, P2C_FORCE_UART_EN -> cleared multiple times, never set
> U3P_USBPHYACR6, PA6_RG_U2_BC11_SW_EN -> cleared mutliple times, never set
> U3P_U2PHYDTM1, P2C_RG_UART_EN -> cleared mutliple times, never set
>
> This probably belongs to some init code executed once.
>
OK,
> > + /* DP/DM BC1.1 path Disable */
> > + u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_BC11_SW_EN);
> > + /* OTG Disable */
> > + u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_OTG_VBUSCMP_EN);
> > + if (!index) {
> > + /* Change 100uA current switch to USB2.0 */
> > + u3p_clrmsk(sif_base, U3P_USBPHYACR5, PA5_RG_U2_HS_100U_U3_EN);
> > + }
> > + udelay(800);
> > +
> > + /* let suspendm=0, set utmi into analog power down */
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_RG_SUSPENDM);
> > + udelay(1);
> > +
> > + u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_VBUSVALID | P2C_RG_AVALID);
> > + u3p_setmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_SESSEND);
> > + if (!index) {
> > + /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
> > + u3p_clrmsk(sif_base, U3P_U3_PHYA_REG0, P3A_RG_U3_VUSB10_ON);
> > + }
> > + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> > +}
> > +
> > +static void u3phy_power_on(struct mt65xx_u3phy *u3phy)
> > +{
> > + phy_index_power_on(u3phy, 0);
> > + if (u3phy->u2port_num > 1)
> > + phy_index_power_on(u3phy, 1);
> > +}
> > +
> > +static void u3phy_power_off(struct mt65xx_u3phy *u3phy)
> > +{
> > + phy_index_power_off(u3phy, 0);
> > + if (u3phy->u2port_num > 1)
> > + phy_index_power_off(u3phy, 1);
> > +}
> > +
> > +static int check_ip_clk_status(struct mt65xx_u3phy *u3phy)
> > +{
> > + int ret;
> > + int u3_port_num;
> > + int u2_port_num;
> > + u32 xhci_cap;
> > + u32 val;
> > + void __iomem *sif_base = u3phy->sif_base;
> > +
> > + xhci_cap = u3p_readl(sif_base, U3P_IP_XHCI_CAP);
> > + u3_port_num = CAP_U3_PORT_NUM(xhci_cap);
> > + u2_port_num = CAP_U2_PORT_NUM(xhci_cap);
> > +
> > + ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
> > + (val & STS1_SYSPLL_STABLE), 100, 10000);
> > + if (ret) {
> > + dev_err(u3phy->dev, "sypll is not stable!!!\n");
> > + return ret;
> > + }
> > +
> > + ret = eadl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
> > + (val & STS1_REF_RST), 100, 10000);
> > + if (ret) {
> > + dev_err(u3phy->dev, "ref_clk is still active!!!\n");
> > + return ret;
> > + }
> > +
> > + ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
> > + (val & STS1_SYS125_RST), 100, 10000);
> > + if (ret) {
> > + dev_err(u3phy->dev, "sys125_ck is still active!!!\n");
> > + return ret;
> > + }
> > +
> > + if (u3_port_num) {
> > + ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
> > + (val & STS1_U3_MAC_RST), 100, 10000);
> > + if (ret) {
> > + dev_err(u3phy->dev, "mac3_mac_ck is still active!!!\n");
> > + return ret;
> > + }
> > + }
> > +
> > + if (u2_port_num) {
> > + ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS2, val,
> > + (val & STS2_U2_MAC_RST), 100, 10000);
> > + if (ret) {
> > + dev_err(u3phy->dev, "mac2_sys_ck is still active!!!\n");
> > + return ret;
> > + }
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int u3phy_ports_enable(struct mt65xx_u3phy *u3phy)
> > +{
> > + int i;
> > + u32 temp;
> > + int u3_port_num;
> > + int u2_port_num;
> > + void __iomem *sif_base = u3phy->sif_base;
> > +
> > + temp = u3p_readl(sif_base, U3P_IP_XHCI_CAP);
> > + u3_port_num = CAP_U3_PORT_NUM(temp);
> > + u2_port_num = CAP_U2_PORT_NUM(temp);
> > + dev_dbg(u3phy->dev, "%s u2p:%d, u3p:%d\n",
> > + __func__, u2_port_num, u3_port_num);
> > +
> > + /* power on host ip */
> > + u3p_clrmsk(sif_base, U3P_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);
> > +
> > + /* power on and enable all u3 ports */
> > + for (i = 0; i < u3_port_num; i++) {
> > + temp = u3p_readl(sif_base, U3P_U3_CTRL(i));
> > + temp &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
> > + temp |= CTRL_U3_PORT_HOST_SEL;
> > + u3p_writel(sif_base, U3P_U3_CTRL(i), temp);
> > + }
> > +
> > + /* power on and enable all u2 ports */
> > + for (i = 0; i < u2_port_num; i++) {
> > + temp = u3p_readl(sif_base, U3P_U2_CTRL(i));
> > + temp &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
> > + temp |= CTRL_U2_PORT_HOST_SEL;
> > + u3p_writel(sif_base, U3P_U2_CTRL(i), temp);
> > + }
> > + return check_ip_clk_status(u3phy);
> > +}
> > +
> > +static int u3phy_ports_disable(struct mt65xx_u3phy *u3phy)
> > +{
> > + int i;
> > + u32 temp;
> > + int ret;
> > + int u3_port_num;
> > + int u2_port_num;
> > + void __iomem *sif_base = u3phy->sif_base;
> > +
> > + temp = u3p_readl(sif_base, U3P_IP_XHCI_CAP);
> > + u3_port_num = CAP_U3_PORT_NUM(temp);
> > + u2_port_num = CAP_U2_PORT_NUM(temp);
> > + dev_dbg(u3phy->dev, "%s u2p:%d, u3p:%d\n",
> > + __func__, u2_port_num, u3_port_num);
> > +
> > + /* power on and enable all u3 ports */
>
> This comment seems wrong.
>
Yes, It is my mistake
> > + for (i = 0; i < u3_port_num; i++) {
> > + temp = u3p_readl(sif_base, U3P_U3_CTRL(i));
> > + temp |= CTRL_U3_PORT_PDN;
> > + u3p_writel(sif_base, U3P_U3_CTRL(i), temp);
> > + }
> > +
> > + /* power on and enable all u2 ports */
>
> ditto
>
> > + for (i = 0; i < u2_port_num; i++) {
> > + temp = u3p_readl(sif_base, U3P_U2_CTRL(i));
> > + temp |= CTRL_U2_PORT_PDN;
> > + u3p_writel(sif_base, U3P_U2_CTRL(i), temp);
> > + }
> > +
> > + /* power off host ip */
> > + u3p_setmsk(sif_base, U3P_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);
> > + u3p_setmsk(sif_base, U3P_IP_PW_CTRL2, CTRL2_IP_DEV_PDN);
> > +
> > + ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, temp,
> > + (temp & STS1_IP_SLEEP_STS), 100, 100000);
> > + if (ret) {
> > + dev_err(u3phy->dev, "ip sleep failed!!!\n");
> > + return ret;
> > + }
> > + return 0;
> > +}
> > +
> > +static void u3phy_timing_init(struct mt65xx_u3phy *u3phy)
> > +{
> > + void __iomem *mbase = u3phy->mac_base;
> > + int u3_port_num;
> > + u32 temp;
> > +
> > + temp = u3p_readl(u3phy->sif_base, U3P_IP_XHCI_CAP);
> > + u3_port_num = CAP_U3_PORT_NUM(temp);
> > +
> > + if (u3_port_num) {
> > + /* set MAC reference clock speed */
> > + u3p_setval(mbase, U3P_UX_EXIT_LFPS_PARAM,
> > + RX_UX_EXIT_REF, RX_UX_EXIT_REF_VAL);
> > + /* set REF_CLK */
> > + u3p_setval(mbase, U3P_REF_CLK_PARAM,
> > + REF_CLK_1000NS, REF_CLK_VAL_DEF);
> > + /* set SYS_CLK */
> > + u3p_setval(mbase, U3P_TIMING_PULSE_CTRL,
> > + U3T_CNT_1US, U3T_CNT_1US_VAL);
> > + /* set LINK_PM_TIMER=3 */
> > + u3p_setval(mbase, U3P_LINK_PM_TIMER,
> > + PM_LC_TIMEOUT, PM_LC_TIMEOUT_VAL);
>
> This fiddles in the register space of the xhci controller. Should be
> done in the xhci driver, not here in the phy driver.
>
done
> > + }
> > + u3p_setval(mbase, U3P_U2_TIMING_PARAM, U2T_VAL_1US, U2T_VAL_1US_VAL);
> > +}
> > +
> > +static int u3phy_clks_enable(struct mt65xx_u3phy *u3phy)
> > +{
> > + int ret;
> > +
> > + ret = clk_prepare_enable(u3phy->u3phya_ref);
> > + if (ret) {
> > + dev_err(u3phy->dev, "failed to enable u3phya_ref\n");
> > + goto u3phya_ref_err;
> > + }
> > + ret = clk_prepare_enable(u3phy->wk_deb_p0);
> > + if (ret) {
> > + dev_err(u3phy->dev, "failed to enable wk_deb_p0\n");
> > + goto usb_p0_err;
> > + }
> > + if (u3phy->u2port_num > 1) {
> > + ret = clk_prepare_enable(u3phy->wk_deb_p1);
> > + if (ret) {
> > + dev_err(u3phy->dev, "failed to enable wk_deb_p1\n");
> > + goto usb_p1_err;
> > + }
> > + }
> > + udelay(50);
> > +
> > + return 0;
> > +
> > +usb_p1_err:
> > + clk_disable_unprepare(u3phy->wk_deb_p0);
> > +usb_p0_err:
> > + clk_disable_unprepare(u3phy->u3phya_ref);
> > +u3phya_ref_err:
> > + return -EINVAL;
> > +}
> > +
> > +static void u3phy_clks_disable(struct mt65xx_u3phy *u3phy)
> > +{
> > + if (u3phy->u2port_num > 1)
> > + clk_disable_unprepare(u3phy->wk_deb_p1);
> > + clk_disable_unprepare(u3phy->wk_deb_p0);
> > + clk_disable_unprepare(u3phy->u3phya_ref);
> > +}
> > +
> > +/* only clocks can be turn off for ip-sleep wakeup mode */
> > +static void usb_wakeup_ip_sleep_en(struct mt65xx_u3phy *u3phy)
> > +{
> > + u32 tmp;
> > + struct regmap *pericfg = u3phy->pericfg;
> > +
> > + regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
> > + tmp &= ~UWK_CTL1_IS_P;
> > + tmp &= ~(UWK_CTL1_IS_C(0xf));
> > + tmp |= UWK_CTL1_IS_C(0x8);
> > + regmap_write(pericfg, PERI_WK_CTRL1, tmp);
> > + regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_IS_E);
> > +
> > + regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
> > + dev_dbg(u3phy->dev, "%s(): WK_CTRL1[P6,E25,C26:29]=%#x\n", __func__,
> > + tmp);
> > +}
> > +
> > +static void usb_wakeup_ip_sleep_dis(struct mt65xx_u3phy *u3phy)
> > +{
> > + u32 tmp;
> > +
> > + regmap_read(u3phy->pericfg, PERI_WK_CTRL1, &tmp);
> > + tmp &= ~UWK_CTL1_IS_E;
> > + regmap_write(u3phy->pericfg, PERI_WK_CTRL1, tmp);
> > +}
> > +
> > +/*
> > +* for line-state wakeup mode, phy's power should not power-down
> > +* and only support cable plug in/out
> > +*/
> > +static void usb_wakeup_line_state_en(struct mt65xx_u3phy *u3phy)
> > +{
> > + u32 tmp;
> > + struct regmap *pericfg = u3phy->pericfg;
> > +
> > + /* line-state of u2-port0 */
> > + regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
> > + tmp &= ~UWK_CTL1_0P_LS_P;
> > + tmp &= ~(UWK_CTL1_0P_LS_C(0xf));
> > + tmp |= UWK_CTL1_0P_LS_C(0x8);
> > + regmap_write(pericfg, PERI_WK_CTRL1, tmp);
> > + regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
> > + regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_0P_LS_E);
> > +
> > + /* line-state of u2-port1 if support */
> > + if (u3phy->u2port_num > 1) {
> > + regmap_read(pericfg, PERI_WK_CTRL0, &tmp);
> > + tmp &= ~(UWK_CTL1_1P_LS_C(0xf));
> > + tmp |= UWK_CTL1_1P_LS_C(0x8);
> > + regmap_write(pericfg, PERI_WK_CTRL0, tmp);
> > + regmap_write(pericfg, PERI_WK_CTRL0, tmp | UWK_CTL1_1P_LS_E);
> > + }
> > +}
> > +
> > +static void usb_wakeup_line_state_dis(struct mt65xx_u3phy *u3phy)
> > +{
> > + u32 tmp;
> > + struct regmap *pericfg = u3phy->pericfg;
> > +
> > + regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
> > + tmp &= ~UWK_CTL1_0P_LS_E;
> > + regmap_write(pericfg, PERI_WK_CTRL1, tmp);
> > +
> > + if (u3phy->u2port_num > 1) {
> > + regmap_read(pericfg, PERI_WK_CTRL0, &tmp);
> > + tmp &= ~UWK_CTL1_1P_LS_E;
> > + regmap_write(pericfg, PERI_WK_CTRL0, tmp);
> > + }
> > +}
> > +
> > +static void usb_wakeup_enable(struct mt65xx_u3phy *u3phy)
> > +{
> > + if (u3phy->wakeup_src == SSUSB_WK_IP_SLEEP)
> > + usb_wakeup_ip_sleep_en(u3phy);
> > + else if (u3phy->wakeup_src == SSUSB_WK_LINE_STATE)
> > + usb_wakeup_line_state_en(u3phy);
> > +}
> > +
> > +static void usb_wakeup_disable(struct mt65xx_u3phy *u3phy)
> > +{
> > + if (u3phy->wakeup_src == SSUSB_WK_IP_SLEEP)
> > + usb_wakeup_ip_sleep_dis(u3phy);
> > + else if (u3phy->wakeup_src == SSUSB_WK_LINE_STATE)
> > + usb_wakeup_line_state_dis(u3phy);
> > +}
> > +
> > +static int mt65xx_u3phy_init(struct usb_phy *phy)
> > +{
> > + struct mt65xx_u3phy *u3phy;
> > + int ret;
> > +
> > + u3phy = container_of(phy, struct mt65xx_u3phy, phy);
> > + dev_dbg(u3phy->dev, "%s+\n", __func__);
> > +
> > + ret = pm_runtime_get_sync(u3phy->dev);
> > + if (ret < 0)
> > + goto pm_err;
> > +
> > + ret = u3phy_clks_enable(u3phy);
> > + if (ret) {
> > + dev_err(u3phy->dev, "failed to enable clks\n");
> > + goto clks_err;
> > + }
> > +
> > + /* reset whole ip */
> > + u3p_setmsk(u3phy->sif_base, U3P_IP_PW_CTRL0, CTRL0_IP_SW_RST);
> > + u3p_clrmsk(u3phy->sif_base, U3P_IP_PW_CTRL0, CTRL0_IP_SW_RST);
> > +
> > + ret = u3phy_ports_enable(u3phy);
> > + if (ret) {
> > + dev_err(u3phy->dev, "failed to enable ports\n");
> > + goto port_err;
> > + }
> > + u3phy_timing_init(u3phy);
> > + u3phy_power_on(u3phy);
> > + msleep(40);
> > +
> > + return 0;
> > +
> > +port_err:
> > + u3phy_clks_disable(u3phy);
> > +clks_err:
> > + pm_runtime_put_sync(u3phy->dev);
> > +pm_err:
> > + return ret;
> > +}
> > +
> > +
> > +static void mt65xx_u3phy_shutdown(struct usb_phy *phy)
> > +{
> > + struct mt65xx_u3phy *u3phy;
> > +
> > + u3phy = container_of(phy, struct mt65xx_u3phy, phy);
> > + u3phy_power_off(u3phy);
> > + u3phy_clks_disable(u3phy);
> > + pm_runtime_put_sync(u3phy->dev);
> > +}
> > +
> > +
> > +static int mt65xx_u3phy_suspend(struct usb_phy *x, int suspend)
> > +{
> > + struct mt65xx_u3phy *u3phy = container_of(x, struct mt65xx_u3phy, phy);
> > +
> > + if (suspend) {
> > + u3phy_ports_disable(u3phy);
> > + u3phy_power_off(u3phy);
> > + u3phy_clks_disable(u3phy);
> > + usb_wakeup_enable(u3phy);
> > + } else {
> > + usb_wakeup_disable(u3phy);
> > + u3phy_clks_enable(u3phy);
> > + u3phy_power_on(u3phy);
> > + u3phy_ports_enable(u3phy);
> > + }
> > + return 0;
> > +}
> > +
> > +
> > +static const struct of_device_id mt65xx_u3phy_id_table[] = {
> > + { .compatible = "mediatek,mt8173-u3phy",},
> > + { },
> > +};
> > +MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
> > +
> > +
> > +static int mt65xx_u3phy_probe(struct platform_device *pdev)
> > +{
> > + struct device *dev = &pdev->dev;
> > + struct device_node *np = dev->of_node;
> > + struct resource *mac_res;
> > + struct resource *sif_res;
> > + struct mt65xx_u3phy *u3phy;
> > + int retval = -ENOMEM;
> > +
> > + u3phy = devm_kzalloc(&pdev->dev, sizeof(*u3phy), GFP_KERNEL);
> > + if (!u3phy)
> > + goto err;
>
> No need for goto if all you do there is to return. return here.
Ok, I will revise it
Thank you very much.
>
> Sascha
>
>
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