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SubjectRe: [PATCH v3 07/13] phy: usb: Add support for new Synopsis USB controller on the 7216
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Date
Hi,

On 10/12/19 6:51 PM, Al Cooper wrote:
> The 7216 has the new USB XHCI controller from Synopsis. While
> this new controller and the PHY are similar to the STB versions,
> the major differences are:
>
> - Many of the registers and fields in the CTRL block have been
> removed or changed.
> - A new set of Synopsis control registers, BCHP_USB_XHCI_GBL, were
> added.

Is it not Synopsys?

Thanks
Kishon

> - MDIO functionality has been replaced with direct access registers
> in the BCHP_USB_XHCI_GBL block.
> - Power up PHY defaults that had to be changed by MDIO in previous
> chips will now power up with the correct defaults.
>
> A new init module was created for this new Synopsis USB controller.
> A new compatible string was added and the driver will dispatch
> into one of two init modules based on it. A "reg-names" field was
> added so the driver can more easily get optional registers.
> A DT bindings document was also added for this driver.
>
> Signed-off-by: Al Cooper <alcooperx@gmail.com>
> ---
> drivers/phy/broadcom/Makefile | 2 +-
> .../phy/broadcom/phy-brcm-usb-init-synopsis.c | 171 ++++++++++++++++++
> drivers/phy/broadcom/phy-brcm-usb-init.h | 2 +
> drivers/phy/broadcom/phy-brcm-usb.c | 70 +++++--
> 4 files changed, 227 insertions(+), 18 deletions(-)
> create mode 100644 drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c
>
> diff --git a/drivers/phy/broadcom/Makefile b/drivers/phy/broadcom/Makefile
> index f453c7d3ffff..88523e2be861 100644
> --- a/drivers/phy/broadcom/Makefile
> +++ b/drivers/phy/broadcom/Makefile
> @@ -8,7 +8,7 @@ obj-$(CONFIG_PHY_NS2_USB_DRD) += phy-bcm-ns2-usbdrd.o
> obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
> obj-$(CONFIG_PHY_BRCM_USB) += phy-brcm-usb-dvr.o
>
> -phy-brcm-usb-dvr-objs := phy-brcm-usb.o phy-brcm-usb-init.o
> +phy-brcm-usb-dvr-objs := phy-brcm-usb.o phy-brcm-usb-init.o phy-brcm-usb-init-synopsis.o
>
> obj-$(CONFIG_PHY_BCM_SR_PCIE) += phy-bcm-sr-pcie.o
> obj-$(CONFIG_PHY_BCM_SR_USB) += phy-bcm-sr-usb.o
> diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c
> new file mode 100644
> index 000000000000..57663492b228
> --- /dev/null
> +++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsis.c
> @@ -0,0 +1,171 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (c) 2018, Broadcom */
> +
> +/*
> + * This module contains USB PHY initialization for power up and S3 resume
> + * for newer Synopsis based USB hardware first used on the bcm7216.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +
> +#include <linux/soc/brcmstb/brcmstb.h>
> +#include "phy-brcm-usb-init.h"
> +
> +/* Register definitions for the USB CTRL block */
> +#define USB_CTRL_SETUP 0x00
> +#define USB_CTRL_SETUP_STRAP_IPP_SEL_MASK 0x02000000
> +#define USB_CTRL_SETUP_SCB2_EN_MASK 0x00008000
> +#define USB_CTRL_SETUP_SCB1_EN_MASK 0x00004000
> +#define USB_CTRL_SETUP_SOFT_SHUTDOWN_MASK 0x00000200
> +#define USB_CTRL_SETUP_IPP_MASK 0x00000020
> +#define USB_CTRL_SETUP_IOC_MASK 0x00000010
> +#define USB_CTRL_USB_PM 0x04
> +#define USB_CTRL_USB_PM_USB_PWRDN_MASK 0x80000000
> +#define USB_CTRL_USB_PM_SOFT_RESET_MASK 0x40000000
> +#define USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK 0x00800000
> +#define USB_CTRL_USB_PM_XHC_SOFT_RESETB_MASK 0x00400000
> +#define USB_CTRL_USB_PM_STATUS 0x08
> +#define USB_CTRL_USB_DEVICE_CTL1 0x10
> +#define USB_CTRL_USB_DEVICE_CTL1_PORT_MODE_MASK 0x00000003
> +
> +
> +static void xhci_soft_reset(struct brcm_usb_init_params *params,
> + int on_off)
> +{
> + void __iomem *ctrl = params->ctrl_regs;
> +
> + /* Assert reset */
> + if (on_off)
> + USB_CTRL_UNSET(ctrl, USB_PM, XHC_SOFT_RESETB);
> + /* De-assert reset */
> + else
> + USB_CTRL_SET(ctrl, USB_PM, XHC_SOFT_RESETB);
> +}
> +
> +static void usb_init_ipp(struct brcm_usb_init_params *params)
> +{
> + void __iomem *ctrl = params->ctrl_regs;
> + u32 reg;
> + u32 orig_reg;
> +
> + pr_debug("%s\n", __func__);
> +
> + orig_reg = reg = brcm_usb_readl(USB_CTRL_REG(ctrl, SETUP));
> + if (params->ipp != 2)
> + /* override ipp strap pin (if it exits) */
> + reg &= ~(USB_CTRL_MASK(SETUP, STRAP_IPP_SEL));
> +
> + /* Override the default OC and PP polarity */
> + reg &= ~(USB_CTRL_MASK(SETUP, IPP) | USB_CTRL_MASK(SETUP, IOC));
> + if (params->ioc)
> + reg |= USB_CTRL_MASK(SETUP, IOC);
> + if (params->ipp == 1)
> + reg |= USB_CTRL_MASK(SETUP, IPP);
> + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, SETUP));
> +
> + /*
> + * If we're changing IPP, make sure power is off long enough
> + * to turn off any connected devices.
> + */
> + if ((reg ^ orig_reg) & USB_CTRL_MASK(SETUP, IPP))
> + msleep(50);
> +}
> +
> +static void usb_init_common(struct brcm_usb_init_params *params)
> +{
> + u32 reg;
> + void __iomem *ctrl = params->ctrl_regs;
> +
> + pr_debug("%s\n", __func__);
> +
> + USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN);
> + /* 1 millisecond - for USB clocks to settle down */
> + usleep_range(1000, 2000);
> +
> + if (USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE)) {
> + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
> + reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE);
> + reg |= params->mode;
> + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
> + }
> + switch (params->mode) {
> + case USB_CTLR_MODE_HOST:
> + USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB);
> + break;
> + default:
> + USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB);
> + USB_CTRL_SET(ctrl, USB_PM, BDC_SOFT_RESETB);
> + break;
> + }
> +}
> +
> +static void usb_init_xhci(struct brcm_usb_init_params *params)
> +{
> + pr_debug("%s\n", __func__);
> +
> + xhci_soft_reset(params, 0);
> +}
> +
> +static void usb_uninit_common(struct brcm_usb_init_params *params)
> +{
> + void __iomem *ctrl = params->ctrl_regs;
> +
> + pr_debug("%s\n", __func__);
> +
> + USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN);
> +
> +}
> +
> +static void usb_uninit_xhci(struct brcm_usb_init_params *params)
> +{
> +
> + pr_debug("%s\n", __func__);
> +
> + xhci_soft_reset(params, 1);
> +}
> +
> +static int usb_get_dual_select(struct brcm_usb_init_params *params)
> +{
> + void __iomem *ctrl = params->ctrl_regs;
> + u32 reg = 0;
> +
> + pr_debug("%s\n", __func__);
> +
> + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
> + reg &= USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE);
> + return reg;
> +}
> +
> +static void usb_set_dual_select(struct brcm_usb_init_params *params, int mode)
> +{
> + void __iomem *ctrl = params->ctrl_regs;
> + u32 reg;
> +
> + pr_debug("%s\n", __func__);
> +
> + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
> + reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE);
> + reg |= mode;
> + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
> +}
> +
> +
> +static const struct brcm_usb_init_ops bcm7216_ops = {
> + .init_ipp = usb_init_ipp,
> + .init_common = usb_init_common,
> + .init_xhci = usb_init_xhci,
> + .uninit_common = usb_uninit_common,
> + .uninit_xhci = usb_uninit_xhci,
> + .get_dual_select = usb_get_dual_select,
> + .set_dual_select = usb_set_dual_select,
> +};
> +
> +void brcm_usb_dvr_init_7216(struct brcm_usb_init_params *params)
> +{
> +
> + pr_debug("%s\n", __func__);
> +
> + params->family_name = "7216";
> + params->ops = &bcm7216_ops;
> +}
> diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.h b/drivers/phy/broadcom/phy-brcm-usb-init.h
> index 7701872d1136..db6851c55335 100644
> --- a/drivers/phy/broadcom/phy-brcm-usb-init.h
> +++ b/drivers/phy/broadcom/phy-brcm-usb-init.h
> @@ -43,6 +43,7 @@ struct brcm_usb_init_ops {
> struct brcm_usb_init_params {
> void __iomem *ctrl_regs;
> void __iomem *xhci_ec_regs;
> + void __iomem *xhci_gbl_regs;
> int ioc;
> int ipp;
> int mode;
> @@ -55,6 +56,7 @@ struct brcm_usb_init_params {
> };
>
> void brcm_usb_dvr_init_7445(struct brcm_usb_init_params *params);
> +void brcm_usb_dvr_init_7216(struct brcm_usb_init_params *params);
>
> static inline u32 brcm_usb_readl(void __iomem *addr)
> {
> diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c
> index 9d93c5599511..64379ede480e 100644
> --- a/drivers/phy/broadcom/phy-brcm-usb.c
> +++ b/drivers/phy/broadcom/phy-brcm-usb.c
> @@ -241,6 +241,15 @@ static const struct attribute_group brcm_usb_phy_group = {
> .attrs = brcm_usb_phy_attrs,
> };
>
> +static const struct of_device_id brcm_usb_dt_ids[] = {
> + {
> + .compatible = "brcm,bcm7216-usb-phy",
> + .data = &brcm_usb_dvr_init_7216,
> + },
> + { .compatible = "brcm,brcmstb-usb-phy" },
> + { /* sentinel */ }
> +};
> +
> static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
> struct brcm_usb_phy_data *priv,
> struct device_node *dn)
> @@ -316,13 +325,16 @@ static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
>
> static int brcm_usb_phy_probe(struct platform_device *pdev)
> {
> - struct resource *res;
> + struct resource *res_ctrl;
> + struct resource *res_xhciec = NULL;
> + struct resource *res_xhcigbl = NULL;
> struct device *dev = &pdev->dev;
> struct brcm_usb_phy_data *priv;
> struct phy_provider *phy_provider;
> struct device_node *dn = pdev->dev.of_node;
> int err;
> const char *mode;
> + const struct of_device_id *match;
>
> priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> @@ -331,30 +343,59 @@ static int brcm_usb_phy_probe(struct platform_device *pdev)
>
> priv->ini.family_id = brcmstb_get_family_id();
> priv->ini.product_id = brcmstb_get_product_id();
> - brcm_usb_dvr_init_7445(&priv->ini);
> +
> + match = of_match_node(brcm_usb_dt_ids, dev->of_node);
> + if (match && match->data) {
> + void (*dvr_init)(struct brcm_usb_init_params *params);
> +
> + dvr_init = match->data;
> + (*dvr_init)(&priv->ini);
> + } else {
> + brcm_usb_dvr_init_7445(&priv->ini);
> + }
> +
> dev_dbg(dev, "Best mapping table is for %s\n",
> priv->ini.family_name);
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!res) {
> - dev_err(dev, "can't get USB_CTRL base address\n");
> - return -EINVAL;
> +
> + /* Newer DT node has reg-names. xhci_ec and xhci_gbl are optional. */
> + res_ctrl = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
> + if (res_ctrl != NULL) {
> + res_xhciec = platform_get_resource_byname(pdev,
> + IORESOURCE_MEM,
> + "xhci_ec");
> + res_xhcigbl = platform_get_resource_byname(pdev,
> + IORESOURCE_MEM,
> + "xhci_gbl");
> + } else {
> + /* Older DT node without reg-names, use index */
> + res_ctrl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (res_ctrl == NULL) {
> + dev_err(dev, "can't get CTRL base address\n");
> + return -EINVAL;
> + }
> + res_xhciec = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> }
> - priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
> + priv->ini.ctrl_regs = devm_ioremap_resource(dev, res_ctrl);
> if (IS_ERR(priv->ini.ctrl_regs)) {
> dev_err(dev, "can't map CTRL register space\n");
> return -EINVAL;
> }
> -
> - /* The XHCI EC registers are optional */
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> - if (res) {
> + if (res_xhciec) {
> priv->ini.xhci_ec_regs =
> - devm_ioremap_resource(dev, res);
> + devm_ioremap_resource(dev, res_xhciec);
> if (IS_ERR(priv->ini.xhci_ec_regs)) {
> dev_err(dev, "can't map XHCI EC register space\n");
> return -EINVAL;
> }
> }
> + if (res_xhcigbl) {
> + priv->ini.xhci_gbl_regs =
> + devm_ioremap_resource(dev, res_xhcigbl);
> + if (IS_ERR(priv->ini.xhci_gbl_regs)) {
> + dev_err(dev, "can't map XHCI Global register space\n");
> + return -EINVAL;
> + }
> + }
>
> of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
> of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);
> @@ -480,11 +521,6 @@ static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
> SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
> };
>
> -static const struct of_device_id brcm_usb_dt_ids[] = {
> - { .compatible = "brcm,brcmstb-usb-phy" },
> - { /* sentinel */ }
> -};
> -
> MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);
>
> static struct platform_driver brcm_usb_driver = {
>

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