[U-Boot] [PATCH v5 6/7] phy: Add USB PHY driver for the cadence USB3
Sherry Sun
sherry.sun at nxp.com
Wed Aug 28 08:05:15 UTC 2019
Hi Jean,
>
> Hi Sherry,
>
> On 21/08/2019 16:36, Sherry Sun wrote:
> > The cdns3-usb-phy driver supports both host and peripheral mode of usb
> > driver which use cadence usb3 IP.
> >
> > Signed-off-by: Sherry Sun <sherry.sun at nxp.com>
> > ---
> > drivers/phy/Kconfig | 8 ++
> > drivers/phy/Makefile | 1 +
> > drivers/phy/cdns3-usb-phy.c | 241
> ++++++++++++++++++++++++++++++++++++
> > 3 files changed, 250 insertions(+)
> > create mode 100644 drivers/phy/cdns3-usb-phy.c
> >
> > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index
> > 3942f035eb..1837b32c31 100644
> > --- a/drivers/phy/Kconfig
> > +++ b/drivers/phy/Kconfig
> > @@ -205,4 +205,12 @@ config MT76X8_USB_PHY
> >
> > This PHY is found on MT76x8 devices supporting USB.
> >
> > +config CDNS3_USB_PHY
> > + bool "Support CDNS3 USB PHY"
> > + depends on PHY
> > + help
> > + Support for the USB PHY in CDNS3 IP.
> > +
> > + This PHY is found on CDNS3 IP devices supporting USB.
> > +
> > endmenu
> > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index
> > 3157f1b7ee..0e062214d3 100644
> > --- a/drivers/phy/Makefile
> > +++ b/drivers/phy/Makefile
> > @@ -22,4 +22,5 @@ obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-
> usbh-phy.o
> > obj-$(CONFIG_OMAP_USB2_PHY) += omap-usb2-phy.o
> > obj-$(CONFIG_KEYSTONE_USB_PHY) += keystone-usb-phy.o
> > obj-$(CONFIG_MT76X8_USB_PHY) += mt76x8-usb-phy.o
> > +obj-$(CONFIG_CDNS3_USB_PHY) += cdns3-usb-phy.o
> > obj-$(CONFIG_PHY_DA8XX_USB) += phy-da8xx-usb.o diff --git
> > a/drivers/phy/cdns3-usb-phy.c b/drivers/phy/cdns3-usb-phy.c new file
> > mode 100644 index 0000000000..c0d308075b
> > --- /dev/null
> > +++ b/drivers/phy/cdns3-usb-phy.c
> > @@ -0,0 +1,241 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright 2019 NXP
> > + *
> > + * Cadence3 USB PHY driver
> > + *
> > + * Author: Sherry Sun <sherry.sun at nxp.com> */
> > +
> > +#include <common.h>
> > +#include <clk.h>
> > +#include <dm.h>
> > +#include <generic-phy.h>
> > +#include <asm/io.h>
> > +
> > +/* PHY registers */
> > +#define PHY_PMA_CMN_CTRL1 (0xC800 * 4)
> > +#define TB_ADDR_CMN_DIAG_HSCLK_SEL (0x01e0 * 4)
> > +#define TB_ADDR_CMN_PLL0_VCOCAL_INIT_TMR (0x0084 * 4)
> > +#define TB_ADDR_CMN_PLL0_VCOCAL_ITER_TMR (0x0085 * 4)
> > +#define TB_ADDR_CMN_PLL0_INTDIV (0x0094 * 4)
> > +#define TB_ADDR_CMN_PLL0_FRACDIV (0x0095 * 4)
> > +#define TB_ADDR_CMN_PLL0_HIGH_THR (0x0096 * 4)
> > +#define TB_ADDR_CMN_PLL0_SS_CTRL1 (0x0098 * 4)
> > +#define TB_ADDR_CMN_PLL0_SS_CTRL2 (0x0099 * 4)
> > +#define TB_ADDR_CMN_PLL0_DSM_DIAG (0x0097 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_OVRD (0x01c2 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_FBH_OVRD (0x01c0 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_FBL_OVRD (0x01c1 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_V2I_TUNE (0x01C5 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_CP_TUNE (0x01C6 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_LF_PROG (0x01C7 * 4)
> > +#define TB_ADDR_CMN_DIAG_PLL0_TEST_MODE (0x01c4 * 4)
> > +#define TB_ADDR_CMN_PSM_CLK_CTRL (0x0061 * 4)
> > +#define TB_ADDR_XCVR_DIAG_RX_LANE_CAL_RST_TMR (0x40ea * 4)
> > +#define TB_ADDR_XCVR_PSM_RCTRL (0x4001 * 4)
> > +#define TB_ADDR_TX_PSC_A0 (0x4100 * 4)
> > +#define TB_ADDR_TX_PSC_A1 (0x4101 * 4)
> > +#define TB_ADDR_TX_PSC_A2 (0x4102 * 4)
> > +#define TB_ADDR_TX_PSC_A3 (0x4103 * 4)
> > +#define TB_ADDR_TX_DIAG_ECTRL_OVRD (0x41f5 * 4)
> > +#define TB_ADDR_TX_PSC_CAL (0x4106 * 4)
> > +#define TB_ADDR_TX_PSC_RDY (0x4107 * 4)
> > +#define TB_ADDR_RX_PSC_A0 (0x8000 * 4)
> > +#define TB_ADDR_RX_PSC_A1 (0x8001 * 4)
> > +#define TB_ADDR_RX_PSC_A2 (0x8002 * 4)
> > +#define TB_ADDR_RX_PSC_A3 (0x8003 * 4)
> > +#define TB_ADDR_RX_PSC_CAL (0x8006 * 4)
> > +#define TB_ADDR_RX_PSC_RDY (0x8007 * 4)
> > +#define TB_ADDR_TX_TXCC_MGNLS_MULT_000 (0x4058 * 4)
> > +#define TB_ADDR_TX_DIAG_BGREF_PREDRV_DELAY (0x41e7 * 4)
> > +#define TB_ADDR_RX_SLC_CU_ITER_TMR (0x80e3 * 4)
> > +#define TB_ADDR_RX_SIGDET_HL_FILT_TMR (0x8090 * 4)
> > +#define TB_ADDR_RX_SAMP_DAC_CTRL (0x8058 * 4)
> > +#define TB_ADDR_RX_DIAG_SIGDET_TUNE (0x81dc * 4)
> > +#define TB_ADDR_RX_DIAG_LFPSDET_TUNE2 (0x81df * 4)
> > +#define TB_ADDR_RX_DIAG_BS_TM (0x81f5 * 4)
> > +#define TB_ADDR_RX_DIAG_DFE_CTRL1 (0x81d3 * 4)
> > +#define TB_ADDR_RX_DIAG_ILL_IQE_TRIM4 (0x81c7 * 4)
> > +#define TB_ADDR_RX_DIAG_ILL_E_TRIM0 (0x81c2 * 4)
> > +#define TB_ADDR_RX_DIAG_ILL_IQ_TRIM0 (0x81c1 * 4)
> > +#define TB_ADDR_RX_DIAG_ILL_IQE_TRIM6 (0x81c9 * 4)
> > +#define TB_ADDR_RX_DIAG_RXFE_TM3 (0x81f8 * 4)
> > +#define TB_ADDR_RX_DIAG_RXFE_TM4 (0x81f9 * 4)
> > +#define TB_ADDR_RX_DIAG_LFPSDET_TUNE (0x81dd * 4)
> > +#define TB_ADDR_RX_DIAG_DFE_CTRL3 (0x81d5 * 4)
> > +#define TB_ADDR_RX_DIAG_SC2C_DELAY (0x81e1 * 4)
> > +#define TB_ADDR_RX_REE_VGA_GAIN_NODFE (0x81bf * 4)
> > +#define TB_ADDR_XCVR_PSM_CAL_TMR (0x4002 * 4)
> > +#define TB_ADDR_XCVR_PSM_A0BYP_TMR (0x4004 * 4)
> > +#define TB_ADDR_XCVR_PSM_A0IN_TMR (0x4003 * 4)
> > +#define TB_ADDR_XCVR_PSM_A1IN_TMR (0x4005 * 4)
> > +#define TB_ADDR_XCVR_PSM_A2IN_TMR (0x4006 * 4)
> > +#define TB_ADDR_XCVR_PSM_A3IN_TMR (0x4007 * 4)
> > +#define TB_ADDR_XCVR_PSM_A4IN_TMR (0x4008 * 4)
> > +#define TB_ADDR_XCVR_PSM_A5IN_TMR (0x4009 * 4)
> > +#define TB_ADDR_XCVR_PSM_A0OUT_TMR (0x400a * 4)
> > +#define TB_ADDR_XCVR_PSM_A1OUT_TMR (0x400b * 4)
> > +#define TB_ADDR_XCVR_PSM_A2OUT_TMR (0x400c * 4)
> > +#define TB_ADDR_XCVR_PSM_A3OUT_TMR (0x400d * 4)
> > +#define TB_ADDR_XCVR_PSM_A4OUT_TMR (0x400e * 4)
> > +#define TB_ADDR_XCVR_PSM_A5OUT_TMR (0x400f * 4)
> > +#define TB_ADDR_TX_RCVDET_EN_TMR (0x4122 * 4)
> > +#define TB_ADDR_TX_RCVDET_ST_TMR (0x4123 * 4)
> > +#define TB_ADDR_XCVR_DIAG_LANE_FCM_EN_MGN_TMR (0x40f2 * 4)
> > +
> > +struct cdns3_usb_phy {
> > + struct clk phy_clk;
> > + void __iomem *phy_regs;
> > +};
> > +
> > +static int cdns3_usb_phy_init(struct phy *phy) {
> > + struct udevice *dev = phy->dev;
> > + struct cdns3_usb_phy *priv = dev_get_priv(dev);
> > + void __iomem *regs = priv->phy_regs;
> > +
> > + writel(0x0830, regs + PHY_PMA_CMN_CTRL1);
> > + writel(0x10, regs + TB_ADDR_CMN_DIAG_HSCLK_SEL);
> > + writel(0x00F0, regs + TB_ADDR_CMN_PLL0_VCOCAL_INIT_TMR);
> > + writel(0x0018, regs + TB_ADDR_CMN_PLL0_VCOCAL_ITER_TMR);
> > + writel(0x00D0, regs + TB_ADDR_CMN_PLL0_INTDIV);
> > + writel(0x4aaa, regs + TB_ADDR_CMN_PLL0_FRACDIV);
> > + writel(0x0034, regs + TB_ADDR_CMN_PLL0_HIGH_THR);
> > + writel(0x1ee, regs + TB_ADDR_CMN_PLL0_SS_CTRL1);
> > + writel(0x7F03, regs + TB_ADDR_CMN_PLL0_SS_CTRL2);
> > + writel(0x0020, regs + TB_ADDR_CMN_PLL0_DSM_DIAG);
> > + writel(0x0000, regs + TB_ADDR_CMN_DIAG_PLL0_OVRD);
> > + writel(0x0000, regs + TB_ADDR_CMN_DIAG_PLL0_FBH_OVRD);
> > + writel(0x0000, regs + TB_ADDR_CMN_DIAG_PLL0_FBL_OVRD);
> > + writel(0x0007, regs + TB_ADDR_CMN_DIAG_PLL0_V2I_TUNE);
> > + writel(0x0027, regs + TB_ADDR_CMN_DIAG_PLL0_CP_TUNE);
> > + writel(0x0008, regs + TB_ADDR_CMN_DIAG_PLL0_LF_PROG);
> > + writel(0x0022, regs + TB_ADDR_CMN_DIAG_PLL0_TEST_MODE);
> > + writel(0x000a, regs + TB_ADDR_CMN_PSM_CLK_CTRL);
> > + writel(0x139, regs + TB_ADDR_XCVR_DIAG_RX_LANE_CAL_RST_TMR);
> > + writel(0xbefc, regs + TB_ADDR_XCVR_PSM_RCTRL);
> > +
> > + writel(0x7799, regs + TB_ADDR_TX_PSC_A0);
> > + writel(0x7798, regs + TB_ADDR_TX_PSC_A1);
> > + writel(0x509b, regs + TB_ADDR_TX_PSC_A2);
> > + writel(0x3, regs + TB_ADDR_TX_DIAG_ECTRL_OVRD);
> > + writel(0x509b, regs + TB_ADDR_TX_PSC_A3);
> > + writel(0x2090, regs + TB_ADDR_TX_PSC_CAL);
> > + writel(0x2090, regs + TB_ADDR_TX_PSC_RDY);
> > +
> > + writel(0xA6FD, regs + TB_ADDR_RX_PSC_A0);
> > + writel(0xA6FD, regs + TB_ADDR_RX_PSC_A1);
> > + writel(0xA410, regs + TB_ADDR_RX_PSC_A2);
> > + writel(0x2410, regs + TB_ADDR_RX_PSC_A3);
> > +
> > + writel(0x23FF, regs + TB_ADDR_RX_PSC_CAL);
> > + writel(0x2010, regs + TB_ADDR_RX_PSC_RDY);
> > +
> > + writel(0x0020, regs + TB_ADDR_TX_TXCC_MGNLS_MULT_000);
> > + writel(0x00ff, regs + TB_ADDR_TX_DIAG_BGREF_PREDRV_DELAY);
> > + writel(0x0002, regs + TB_ADDR_RX_SLC_CU_ITER_TMR);
> > + writel(0x0013, regs + TB_ADDR_RX_SIGDET_HL_FILT_TMR);
> > + writel(0x0000, regs + TB_ADDR_RX_SAMP_DAC_CTRL);
> > + writel(0x1004, regs + TB_ADDR_RX_DIAG_SIGDET_TUNE);
> > + writel(0x4041, regs + TB_ADDR_RX_DIAG_LFPSDET_TUNE2);
> > + writel(0x0480, regs + TB_ADDR_RX_DIAG_BS_TM);
> > + writel(0x8006, regs + TB_ADDR_RX_DIAG_DFE_CTRL1);
> > + writel(0x003f, regs + TB_ADDR_RX_DIAG_ILL_IQE_TRIM4);
> > + writel(0x543f, regs + TB_ADDR_RX_DIAG_ILL_E_TRIM0);
> > + writel(0x543f, regs + TB_ADDR_RX_DIAG_ILL_IQ_TRIM0);
> > + writel(0x0000, regs + TB_ADDR_RX_DIAG_ILL_IQE_TRIM6);
> > + writel(0x8000, regs + TB_ADDR_RX_DIAG_RXFE_TM3);
> > + writel(0x0003, regs + TB_ADDR_RX_DIAG_RXFE_TM4);
> > + writel(0x2408, regs + TB_ADDR_RX_DIAG_LFPSDET_TUNE);
> > + writel(0x05ca, regs + TB_ADDR_RX_DIAG_DFE_CTRL3);
> > + writel(0x0258, regs + TB_ADDR_RX_DIAG_SC2C_DELAY);
> > + writel(0x1fff, regs + TB_ADDR_RX_REE_VGA_GAIN_NODFE);
> > +
> > + writel(0x02c6, regs + TB_ADDR_XCVR_PSM_CAL_TMR);
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A0BYP_TMR);
> > + writel(0x02c6, regs + TB_ADDR_XCVR_PSM_A0IN_TMR);
> > + writel(0x0010, regs + TB_ADDR_XCVR_PSM_A1IN_TMR);
> > + writel(0x0010, regs + TB_ADDR_XCVR_PSM_A2IN_TMR);
> > + writel(0x0010, regs + TB_ADDR_XCVR_PSM_A3IN_TMR);
> > + writel(0x0010, regs + TB_ADDR_XCVR_PSM_A4IN_TMR);
> > + writel(0x0010, regs + TB_ADDR_XCVR_PSM_A5IN_TMR);
> > +
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A0OUT_TMR);
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A1OUT_TMR);
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A2OUT_TMR);
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A3OUT_TMR);
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A4OUT_TMR);
> > + writel(0x0002, regs + TB_ADDR_XCVR_PSM_A5OUT_TMR);
> > +
> > + /* Change rx detect parameter */
> > + writel(0x960, regs + TB_ADDR_TX_RCVDET_EN_TMR);
> > + writel(0x01e0, regs + TB_ADDR_TX_RCVDET_ST_TMR);
> > + writel(0x0090, regs +
> TB_ADDR_XCVR_DIAG_LANE_FCM_EN_MGN_TMR);
> > +
> > + udelay(10);
> > + return 0;
> > +}
>
> Where do all those hard-coded values come from? Is this something that
> would work for all platforms implementing this PHY ?
>
These values are from Cadence USB 3.0 PHY User Guide, and certainly it can work for all platforms which use this PHY.
> Is there a linux driver for this PHY ?
Yes, the cdns3 phy driver in kernel is phy-cadence-sierra.c,
but it is shared with pcie, and it has a lot of differences with this PHY driver in uboot.
Best regards
Sherry sun
>
> JJ
>
> > +
> > +struct phy_ops cdns3_usb_phy_ops = {
> > + .init = cdns3_usb_phy_init,
> > +};
> > +
> > +static int cdns3_usb_phy_remove(struct udevice *dev) { #if
> > +CONFIG_IS_ENABLED(CLK)
> > + struct cdns3_usb_phy *priv = dev_get_priv(dev);
> > + int ret;
> > +
> > + if (priv->phy_clk.dev) {
> > + ret = clk_disable(&priv->phy_clk);
> > + if (ret)
> > + return ret;
> > +
> > + ret = clk_free(&priv->phy_clk);
> > + if (ret)
> > + return ret;
> > + }
> > +#endif
> > +
> > + return 0;
> > +}
> > +
> > +static int cdns3_usb_phy_probe(struct udevice *dev) {
> > + struct cdns3_usb_phy *priv = dev_get_priv(dev);
> > +
> > +#if CONFIG_IS_ENABLED(CLK)
> > + int ret;
> > +
> > + ret = clk_get_by_name(dev, "main_clk", &priv->phy_clk);
> > + if (ret) {
> > + printf("Failed to get phy_clk\n");
> > + return ret;
> > + }
> > +
> > + ret = clk_enable(&priv->phy_clk);
> > + if (ret) {
> > + printf("Failed to enable phy_clk\n");
> > + return ret;
> > + }
> > +#endif
> > + priv->phy_regs = (void *__iomem)devfdt_get_addr(dev);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct udevice_id cdns3_usb_phy_ids[] = {
> > + { .compatible = "cdns,usb3-phy" },
>
>
> > + { }
> > +};
> > +
> > +U_BOOT_DRIVER(cdns3_usb_phy) = {
> > + .name = "cdns3_usb_phy",
> > + .id = UCLASS_PHY,
> > + .of_match = cdns3_usb_phy_ids,
> > + .probe = cdns3_usb_phy_probe,
> > + .remove = cdns3_usb_phy_remove,
> > + .ops = &cdns3_usb_phy_ops,
> > + .priv_auto_alloc_size = sizeof(struct cdns3_usb_phy), };
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