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Date: Wed, 1 Jun 2022 14:53:11 -0500
From: Andrew Halaney <ahalaney@...hat.com>
To: Harsh Agarwal <quic_harshq@...cinc.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Felipe Balbi <balbi@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, quic_pkondeti@...cinc.com,
quic_ppratap@...cinc.com, quic_jackp@...cinc.com
Subject: Re: [PATCH 3/3] usb: dwc3: Refactor PHY logic to support Multiport
Controller
On Tue, May 31, 2022 at 01:50:17PM +0530, Harsh Agarwal wrote:
> Currently the DWC3 driver supports only single port controller
> which requires at most 2 PHYs ie HS and SS PHYs.
>
> But some SOCs have a "multiport" USB DWC3 controller where a
> single controller supports multiple ports and each port have
> their own PHYs. Refactor PHY logic to support the same.
>
> Signed-off-by: Harsh Agarwal <quic_harshq@...cinc.com>
> ---
> drivers/usb/dwc3/core.c | 400 +++++++++++++++++++++++++++++++++-------------
> drivers/usb/dwc3/core.h | 12 +-
> drivers/usb/dwc3/drd.c | 16 +-
> drivers/usb/dwc3/gadget.c | 4 +-
> 4 files changed, 305 insertions(+), 127 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 5734219..5cc799e 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -120,7 +120,7 @@ static void __dwc3_set_mode(struct work_struct *work)
> {
> struct dwc3 *dwc = work_to_dwc(work);
> unsigned long flags;
> - int ret;
> + int i, ret;
> u32 reg;
>
> mutex_lock(&dwc->mutex);
> @@ -189,10 +189,13 @@ static void __dwc3_set_mode(struct work_struct *work)
> if (ret) {
> dev_err(dwc->dev, "failed to initialize host\n");
> } else {
> - if (dwc->usb2_phy)
> - otg_set_vbus(dwc->usb2_phy->otg, true);
> - phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
> - phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + if (dwc->usb2_phy[i])
> + otg_set_vbus(dwc->usb2_phy[i]->otg, true);
> + phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
> + }
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
> if (dwc->dis_split_quirk) {
> reg = dwc3_readl(dwc->regs, DWC3_GUCTL3);
> reg |= DWC3_GUCTL3_SPLITDISABLE;
> @@ -205,10 +208,10 @@ static void __dwc3_set_mode(struct work_struct *work)
>
> dwc3_event_buffers_setup(dwc);
>
> - if (dwc->usb2_phy)
> - otg_set_vbus(dwc->usb2_phy->otg, false);
> - phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
> - phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
> + if (dwc->usb2_phy[0])
> + otg_set_vbus(dwc->usb2_phy[0]->otg, false);
> + phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
> + phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
>
> ret = dwc3_gadget_init(dwc);
> if (ret)
> @@ -656,6 +659,7 @@ static int dwc3_core_ulpi_init(struct dwc3 *dwc)
> */
> static int dwc3_phy_setup(struct dwc3 *dwc)
> {
> + int i;
> unsigned int hw_mode;
> u32 reg;
>
> @@ -716,7 +720,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
> if (dwc->dis_del_phy_power_chg_quirk)
> reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
>
> - dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
>
> reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
>
> @@ -730,7 +735,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
> } else if (dwc->hsphy_interface &&
> !strncmp(dwc->hsphy_interface, "ulpi", 4)) {
> reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> } else {
> /* Relying on default value. */
> if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
> @@ -787,7 +793,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
> if (dwc->dis_u2_freeclk_exists_quirk)
> reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
>
> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
>
> return 0;
> }
> @@ -826,17 +833,23 @@ static void dwc3_clk_disable(struct dwc3 *dwc)
>
> static void dwc3_core_exit(struct dwc3 *dwc)
> {
> + int i;
> dwc3_event_buffers_cleanup(dwc);
>
> - usb_phy_shutdown(dwc->usb2_phy);
> - usb_phy_shutdown(dwc->usb3_phy);
> - phy_exit(dwc->usb2_generic_phy);
> - phy_exit(dwc->usb3_generic_phy);
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + usb_phy_shutdown(dwc->usb2_phy[i]);
> + usb_phy_set_suspend(dwc->usb2_phy[i], 1);
> + phy_exit(dwc->usb2_generic_phy[i]);
> + phy_power_off(dwc->usb2_generic_phy[i]);
> + }
> +
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + usb_phy_shutdown(dwc->usb3_phy[i]);
> + usb_phy_set_suspend(dwc->usb3_phy[i], 1);
> + phy_exit(dwc->usb3_generic_phy[i]);
> + phy_power_off(dwc->usb3_generic_phy[i]);
> + }
>
> - usb_phy_set_suspend(dwc->usb2_phy, 1);
> - usb_phy_set_suspend(dwc->usb3_phy, 1);
> - phy_power_off(dwc->usb2_generic_phy);
> - phy_power_off(dwc->usb3_generic_phy);
> dwc3_clk_disable(dwc);
> reset_control_assert(dwc->reset);
> }
> @@ -1039,7 +1052,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
> {
> unsigned int hw_mode;
> u32 reg;
> - int ret;
> + int ret, i;
>
> hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
>
> @@ -1067,16 +1080,24 @@ static int dwc3_core_init(struct dwc3 *dwc)
> dwc->phys_ready = true;
> }
>
> - usb_phy_init(dwc->usb2_phy);
> - usb_phy_init(dwc->usb3_phy);
> - ret = phy_init(dwc->usb2_generic_phy);
> - if (ret < 0)
> - goto err0a;
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + usb_phy_init(dwc->usb2_phy[i]);
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + usb_phy_init(dwc->usb3_phy[i]);
>
> - ret = phy_init(dwc->usb3_generic_phy);
> - if (ret < 0) {
> - phy_exit(dwc->usb2_generic_phy);
> - goto err0a;
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + ret = phy_init(dwc->usb2_generic_phy[i]);
> + if (ret < 0)
> + goto err0a;
Should we clean up the prior phys that did not fail? There's a couple
loops where that question stands in this patch.
> + }
> +
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + ret = phy_init(dwc->usb3_generic_phy[i]);
> + if (ret < 0) {
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + phy_exit(dwc->usb2_generic_phy[i]);
> + goto err0a;
> + }
> }
>
> ret = dwc3_core_soft_reset(dwc);
> @@ -1086,15 +1107,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
> if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
> !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
> if (!dwc->dis_u3_susphy_quirk) {
> - reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
> - reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> - dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(i));
> + reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> + dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
> + }
> }
>
> if (!dwc->dis_u2_susphy_quirk) {
> - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> - reg |= DWC3_GUSB2PHYCFG_SUSPHY;
> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
> + reg |= DWC3_GUSB2PHYCFG_SUSPHY;
> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> + }
> }
> }
>
> @@ -1113,15 +1138,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
>
> dwc3_set_incr_burst_type(dwc);
>
> - usb_phy_set_suspend(dwc->usb2_phy, 0);
> - usb_phy_set_suspend(dwc->usb3_phy, 0);
> - ret = phy_power_on(dwc->usb2_generic_phy);
> - if (ret < 0)
> - goto err2;
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + usb_phy_set_suspend(dwc->usb2_phy[i], 0);
> + ret = phy_power_on(dwc->usb2_generic_phy[i]);
> + if (ret < 0)
> + goto err2;
> + }
>
> - ret = phy_power_on(dwc->usb3_generic_phy);
> - if (ret < 0)
> - goto err3;
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + usb_phy_set_suspend(dwc->usb3_phy[i], 0);
> + ret = phy_power_on(dwc->usb3_generic_phy[i]);
> + if (ret < 0)
> + goto err3;
> + }
>
> ret = dwc3_event_buffers_setup(dwc);
> if (ret) {
> @@ -1229,20 +1258,29 @@ static int dwc3_core_init(struct dwc3 *dwc)
> return 0;
>
> err4:
> - phy_power_off(dwc->usb3_generic_phy);
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + phy_power_off(dwc->usb3_generic_phy[i]);
>
> err3:
> - phy_power_off(dwc->usb2_generic_phy);
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + phy_power_off(dwc->usb2_generic_phy[i]);
>
> err2:
> - usb_phy_set_suspend(dwc->usb2_phy, 1);
> - usb_phy_set_suspend(dwc->usb3_phy, 1);
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + usb_phy_set_suspend(dwc->usb2_phy[i], 1);
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + usb_phy_set_suspend(dwc->usb3_phy[i], 1);
>
> err1:
> - usb_phy_shutdown(dwc->usb2_phy);
> - usb_phy_shutdown(dwc->usb3_phy);
> - phy_exit(dwc->usb2_generic_phy);
> - phy_exit(dwc->usb3_generic_phy);
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + usb_phy_shutdown(dwc->usb2_phy[i]);
> + phy_exit(dwc->usb2_generic_phy[i]);
> + }
> +
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + usb_phy_shutdown(dwc->usb3_phy[i]);
> + phy_exit(dwc->usb3_generic_phy[i]);
> + }
>
> err0a:
> dwc3_ulpi_exit(dwc);
> @@ -1251,53 +1289,172 @@ static int dwc3_core_init(struct dwc3 *dwc)
> return ret;
> }
>
> -static int dwc3_core_get_phy(struct dwc3 *dwc)
> +static struct usb_phy *dwc3_core_get_phy_by_handle_with_node(struct device *dev,
> + const char *phandle, u8 index, struct device_node *lookup_node)
> +{
> + struct device_node *node;
> + struct usb_phy *phy;
> +
> + node = of_parse_phandle(lookup_node, phandle, index);
> + if (!node) {
> + dev_err(dev, "failed to get %s phandle in %pOF node\n", phandle,
> + dev->of_node);
> + return ERR_PTR(-ENODEV);
> + }
> + phy = devm_usb_get_phy_by_node(dev, node, NULL);
> + of_node_put(node);
> + return phy;
> +}
> +
> +static int dwc3_count_phys(struct dwc3 *dwc, struct device_node *lookup_node)
> +{
> + int count;
> +
> + count = of_count_phandle_with_args(lookup_node, "phys", NULL);
> +
> + if (count == -ENOENT)
> + count = of_count_phandle_with_args(lookup_node, "usb-phy", NULL);
> +
> + if (count == 1) {
> + dwc->num_usb2_phy++;
> + } else if (count == 2) {
> + dwc->num_usb2_phy++;
> + dwc->num_usb3_phy++;
> + } else {
> + return count;
> + }
> + return 0;
> +}
> +
> +static int dwc3_extract_num_phys(struct dwc3 *dwc)
> +{
> + struct device_node *ports, *port;
> + int ret;
> +
> + /* Find if any "multiport" child is present inside DWC3*/
Nit, space after DWC3
> + for_each_available_child_of_node(dwc->dev->of_node, ports) {
> + if (!strcmp(ports->name, "multiport"))
> + break;
> + }
> + if (!ports) {
> + dwc->num_usb2_phy = 1;
> + dwc->num_usb3_phy = 1;
> + } else {
> + for_each_available_child_of_node(ports, port) {
> + ret = dwc3_count_phys(dwc, port);
> + if (ret)
> + return ret;
> + }
> + }
> + dev_info(dwc->dev, "Num of HS and SS PHY are %u %u\n", dwc->num_usb2_phy,
> + dwc->num_usb3_phy);
> +
> + dwc->usb2_phy = devm_kzalloc(dwc->dev,
> + sizeof(*dwc->usb2_phy) * dwc->num_usb2_phy, GFP_KERNEL);
> + if (!dwc->usb2_phy)
> + return -ENOMEM;
> +
> + dwc->usb3_phy = devm_kzalloc(dwc->dev,
> + sizeof(*dwc->usb3_phy) * dwc->num_usb3_phy, GFP_KERNEL);
> + if (!dwc->usb3_phy)
> + return -ENOMEM;
> +
> + dwc->usb2_generic_phy = devm_kzalloc(dwc->dev,
> + sizeof(*dwc->usb2_generic_phy) * dwc->num_usb2_phy, GFP_KERNEL);
> + if (!dwc->usb2_generic_phy)
> + return -ENOMEM;
> +
> + dwc->usb3_generic_phy = devm_kzalloc(dwc->dev,
> + sizeof(*dwc->usb3_generic_phy) * dwc->num_usb3_phy, GFP_KERNEL);
> + if (!dwc->usb3_generic_phy)
> + return -ENOMEM;
> +
> + return 0;
> +}
> +
> +static int dwc3_core_get_phy_by_node(struct dwc3 *dwc,
> + struct device_node *lookup_node, int i)
> {
> struct device *dev = dwc->dev;
> - struct device_node *node = dev->of_node;
> - int ret;
> + int ret;
>
> - if (node) {
> - dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
> - dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
> + if (lookup_node) {
> + dwc->usb2_phy[i] = devm_of_usb_get_phy_by_phandle(dev,
> + "usb-phy", 0, lookup_node);
> + dwc->usb3_phy[i] = devm_of_usb_get_phy_by_phandle(dev,
> + "usb-phy", 1, lookup_node);
> } else {
> - dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
> - dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
> + dwc->usb2_phy[i] = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
> + dwc->usb3_phy[i] = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
> }
>
> - if (IS_ERR(dwc->usb2_phy)) {
> - ret = PTR_ERR(dwc->usb2_phy);
> + if (IS_ERR(dwc->usb2_phy[i])) {
> + ret = PTR_ERR(dwc->usb2_phy[i]);
> if (ret == -ENXIO || ret == -ENODEV)
> - dwc->usb2_phy = NULL;
> + dwc->usb2_phy[i] = NULL;
> else
> return dev_err_probe(dev, ret, "no usb2 phy configured\n");
> }
>
> - if (IS_ERR(dwc->usb3_phy)) {
> - ret = PTR_ERR(dwc->usb3_phy);
> + if (IS_ERR(dwc->usb3_phy[i])) {
> + ret = PTR_ERR(dwc->usb3_phy[i]);
> if (ret == -ENXIO || ret == -ENODEV)
> - dwc->usb3_phy = NULL;
> + dwc->usb3_phy[i] = NULL;
> else
> return dev_err_probe(dev, ret, "no usb3 phy configured\n");
> }
>
> - dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
> - if (IS_ERR(dwc->usb2_generic_phy)) {
> - ret = PTR_ERR(dwc->usb2_generic_phy);
> - if (ret == -ENOSYS || ret == -ENODEV)
> - dwc->usb2_generic_phy = NULL;
> + dwc->usb2_generic_phy[i] = devm_of_phy_get(dev, lookup_node, "usb2-phy");
> + if (IS_ERR(dwc->usb2_generic_phy[i])) {
> + ret = PTR_ERR(dwc->usb2_generic_phy[i]);
> + if (ret == -ENODEV)
I think this can be -ENOSYS if !CONFIG_GENERIC_PHY
> + dwc->usb2_generic_phy[i] = NULL;
> else
> return dev_err_probe(dev, ret, "no usb2 phy configured\n");
> }
>
> - dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
> - if (IS_ERR(dwc->usb3_generic_phy)) {
> - ret = PTR_ERR(dwc->usb3_generic_phy);
> - if (ret == -ENOSYS || ret == -ENODEV)
> - dwc->usb3_generic_phy = NULL;
> + dwc->usb3_generic_phy[i] = devm_of_phy_get(dev, lookup_node, "usb3-phy");
> + if (IS_ERR(dwc->usb3_generic_phy[i])) {
> + ret = PTR_ERR(dwc->usb3_generic_phy[i]);
> + if (ret == -ENODEV)
> + dwc->usb3_generic_phy[i] = NULL;
> else
> return dev_err_probe(dev, ret, "no usb3 phy configured\n");
> }
> + return 0;
> +}
> +
> +static int dwc3_core_get_phy(struct dwc3 *dwc)
> +{
> + struct device *dev = dwc->dev;
> + struct device_node *node = dev->of_node;
> + struct device_node *ports, *port;
> + int ret, i = 0;
> +
> + ret = dwc3_extract_num_phys(dwc);
> + if (ret) {
> + dev_err(dwc->dev, "Unable to extract number of PHYs\n");
> + return ret;
> + }
> +
> + /* Find if any "multiport" child is present inside DWC3*/
Nit, space after DWC3
> + for_each_available_child_of_node(node, ports) {
> + if (!strcmp(ports->name, "multiport"))
> + break;
> + }
> +
> + if (!ports) {
> + ret = dwc3_core_get_phy_by_node(dwc, node, 0);
> + if (ret)
> + return ret;
> + } else {
> + for_each_available_child_of_node(ports, port) {
> + ret = dwc3_core_get_phy_by_node(dwc, port, i);
> + if (ret)
> + return ret;
> + i++;
> + }
> + }
>
> return 0;
> }
> @@ -1305,16 +1462,16 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
> static int dwc3_core_init_mode(struct dwc3 *dwc)
> {
> struct device *dev = dwc->dev;
> - int ret;
> + int i, ret;
>
> switch (dwc->dr_mode) {
> case USB_DR_MODE_PERIPHERAL:
> dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
>
> - if (dwc->usb2_phy)
> - otg_set_vbus(dwc->usb2_phy->otg, false);
> - phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
> - phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
> + if (dwc->usb2_phy[0])
> + otg_set_vbus(dwc->usb2_phy[0]->otg, false);
> + phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
> + phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
>
> ret = dwc3_gadget_init(dwc);
> if (ret)
> @@ -1323,10 +1480,15 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
> case USB_DR_MODE_HOST:
> dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
>
> - if (dwc->usb2_phy)
> - otg_set_vbus(dwc->usb2_phy->otg, true);
> - phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
> - phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + if (dwc->usb2_phy[i])
> + otg_set_vbus(dwc->usb2_phy[i]->otg, true);
> + phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
> + }
> +
> +
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
>
> ret = dwc3_host_init(dwc);
> if (ret)
> @@ -1674,7 +1836,7 @@ static int dwc3_probe(struct platform_device *pdev)
> struct resource *res, dwc_res;
> struct dwc3 *dwc;
>
> - int ret;
> + int ret, i;
>
> void __iomem *regs;
>
> @@ -1839,15 +2001,18 @@ static int dwc3_probe(struct platform_device *pdev)
> dwc3_debugfs_exit(dwc);
> dwc3_event_buffers_cleanup(dwc);
>
> - usb_phy_shutdown(dwc->usb2_phy);
> - usb_phy_shutdown(dwc->usb3_phy);
> - phy_exit(dwc->usb2_generic_phy);
> - phy_exit(dwc->usb3_generic_phy);
> -
> - usb_phy_set_suspend(dwc->usb2_phy, 1);
> - usb_phy_set_suspend(dwc->usb3_phy, 1);
> - phy_power_off(dwc->usb2_generic_phy);
> - phy_power_off(dwc->usb3_generic_phy);
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + usb_phy_shutdown(dwc->usb2_phy[i]);
> + usb_phy_set_suspend(dwc->usb2_phy[i], 1);
> + phy_exit(dwc->usb2_generic_phy[i]);
> + phy_power_off(dwc->usb2_generic_phy[i]);
> + }
> + for (i = 0; i < dwc->num_usb3_phy; i++) {
> + usb_phy_shutdown(dwc->usb3_phy[i]);
> + usb_phy_set_suspend(dwc->usb3_phy[i], 1);
> + phy_exit(dwc->usb3_generic_phy[i]);
> + phy_power_off(dwc->usb3_generic_phy[i]);
> + }
>
> dwc3_ulpi_exit(dwc);
>
> @@ -1929,6 +2094,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
>
> static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
> {
> + int i;
> unsigned long flags;
> u32 reg;
>
> @@ -1951,17 +2117,21 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
> /* Let controller to suspend HSPHY before PHY driver suspends */
> if (dwc->dis_u2_susphy_quirk ||
> dwc->dis_enblslpm_quirk) {
> - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> - reg |= DWC3_GUSB2PHYCFG_ENBLSLPM |
> - DWC3_GUSB2PHYCFG_SUSPHY;
> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> -
> - /* Give some time for USB2 PHY to suspend */
> - usleep_range(5000, 6000);
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
> + reg |= DWC3_GUSB2PHYCFG_ENBLSLPM |
> + DWC3_GUSB2PHYCFG_SUSPHY;
> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> +
> + /* Give some time for USB2 PHY to suspend */
> + usleep_range(5000, 6000);
> + }
> }
>
> - phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
> - phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + phy_pm_runtime_put_sync(dwc->usb2_generic_phy[i]);
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + phy_pm_runtime_put_sync(dwc->usb3_generic_phy[i]);
> break;
> case DWC3_GCTL_PRTCAP_OTG:
> /* do nothing during runtime_suspend */
> @@ -1989,7 +2159,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
> static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
> {
> unsigned long flags;
> - int ret;
> + int i, ret;
> u32 reg;
>
> switch (dwc->current_dr_role) {
> @@ -2012,17 +2182,21 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
> break;
> }
> /* Restore GUSB2PHYCFG bits that were modified in suspend */
> - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> - if (dwc->dis_u2_susphy_quirk)
> - reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
> + for (i = 0; i < dwc->num_usb2_phy; i++) {
> + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
> + if (dwc->dis_u2_susphy_quirk)
> + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
>
> - if (dwc->dis_enblslpm_quirk)
> - reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
> + if (dwc->dis_enblslpm_quirk)
> + reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
>
> - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> + }
>
> - phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
> - phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
> + for (i = 0; i < dwc->num_usb2_phy; i++)
> + phy_pm_runtime_get_sync(dwc->usb2_generic_phy[i]);
> + for (i = 0; i < dwc->num_usb3_phy; i++)
> + phy_pm_runtime_get_sync(dwc->usb3_generic_phy[i]);
> break;
> case DWC3_GCTL_PRTCAP_OTG:
> /* nothing to do on runtime_resume */
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index 81c486b..c169bf1 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -1020,6 +1020,8 @@ struct dwc3_scratchpad_array {
> * @usb_psy: pointer to power supply interface.
> * @usb2_phy: pointer to USB2 PHY
> * @usb3_phy: pointer to USB3 PHY
> + * @num_usb2_phy: Number of HS ports controlled by the core
> + * @num_dsphy: Number of SS ports controlled by the core
s/num_dsphy/num_usb3_phy/
> * @usb2_generic_phy: pointer to USB2 PHY
> * @usb3_generic_phy: pointer to USB3 PHY
> * @phys_ready: flag to indicate that PHYs are ready
> @@ -1147,11 +1149,13 @@ struct dwc3 {
>
> struct reset_control *reset;
>
> - struct usb_phy *usb2_phy;
> - struct usb_phy *usb3_phy;
> + struct usb_phy **usb2_phy;
> + struct usb_phy **usb3_phy;
> + u32 num_usb2_phy;
> + u32 num_usb3_phy;
>
> - struct phy *usb2_generic_phy;
> - struct phy *usb3_generic_phy;
> + struct phy **usb2_generic_phy;
> + struct phy **usb3_generic_phy;
>
> bool phys_ready;
>
> diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
> index 039bf24..404643f 100644
> --- a/drivers/usb/dwc3/drd.c
> +++ b/drivers/usb/dwc3/drd.c
> @@ -384,10 +384,10 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
> if (ret) {
> dev_err(dwc->dev, "failed to initialize host\n");
> } else {
> - if (dwc->usb2_phy)
> - otg_set_vbus(dwc->usb2_phy->otg, true);
> - if (dwc->usb2_generic_phy)
> - phy_set_mode(dwc->usb2_generic_phy,
> + if (dwc->usb2_phy[0])
> + otg_set_vbus(dwc->usb2_phy[0]->otg, true);
> + if (dwc->usb2_generic_phy[0])
> + phy_set_mode(dwc->usb2_generic_phy[0],
> PHY_MODE_USB_HOST);
> }
> break;
> @@ -398,10 +398,10 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
> dwc3_event_buffers_setup(dwc);
> spin_unlock_irqrestore(&dwc->lock, flags);
>
> - if (dwc->usb2_phy)
> - otg_set_vbus(dwc->usb2_phy->otg, false);
> - if (dwc->usb2_generic_phy)
> - phy_set_mode(dwc->usb2_generic_phy,
> + if (dwc->usb2_phy[0])
> + otg_set_vbus(dwc->usb2_phy[0]->otg, false);
> + if (dwc->usb2_generic_phy[0])
> + phy_set_mode(dwc->usb2_generic_phy[0],
> PHY_MODE_USB_DEVICE);
> ret = dwc3_gadget_init(dwc);
> if (ret)
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 00427d1..e3b2a17 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -2872,8 +2872,8 @@ static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
> union power_supply_propval val = {0};
> int ret;
>
> - if (dwc->usb2_phy)
> - return usb_phy_set_power(dwc->usb2_phy, mA);
> + if (dwc->usb2_phy[0])
> + return usb_phy_set_power(dwc->usb2_phy[0], mA);
>
> if (!dwc->usb_psy)
> return -EOPNOTSUPP;
> --
> 2.7.4
>
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