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This is required for Tegra which requires device specific actions for power management to be executed during USB state transitions. Signed-off-by: Jim Lin Reviewed-by: Jon Hunter Tested-by: Jon Hunter Acked-by: Thierry Reding --- v5: new change v6: adjust parameter alignment (xhci.h hub_control) v7: change commit message drivers/usb/host/xhci.c | 2 ++ drivers/usb/host/xhci.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 902f410874e8..3c7bf0a0e0b4 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -5461,6 +5461,8 @@ void xhci_init_driver(struct hc_driver *drv, drv->check_bandwidth = over->check_bandwidth; if (over->reset_bandwidth) drv->reset_bandwidth = over->reset_bandwidth; + if (over->hub_control) + drv->hub_control = over->hub_control; } } EXPORT_SYMBOL_GPL(xhci_init_driver); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 5a75fe563123..f51b674fc10c 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1943,6 +1943,8 @@ struct xhci_driver_overrides { struct usb_host_endpoint *ep); int (*check_bandwidth)(struct usb_hcd *, struct usb_device *); void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *); + int (*hub_control)(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength); }; #define XHCI_CFC_DELAY 10 From patchwork Fri Nov 11 10:18:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Lin X-Patchwork-Id: 18661 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp658224wru; Fri, 11 Nov 2022 02:23:51 -0800 (PST) X-Google-Smtp-Source: AA0mqf7DPZGIOPsO8bpX0NxV77hzBmD1lcycd8bF7HnF5J9bud7cchJSM8TmwoXkJxX3O1dDxvgN X-Received: by 2002:a17:906:abc8:b0:78a:643e:6892 with SMTP id kq8-20020a170906abc800b0078a643e6892mr1288035ejb.662.1668162231628; Fri, 11 Nov 2022 02:23:51 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1668162231; cv=pass; d=google.com; s=arc-20160816; b=KLRew99pW3BiZ4POCnf/QR3oxfk6IRfRb7juigY37pRERGWoeEo/97VsprqBGIyQVa GVcAj0zPD22sv2wnDoHUq7N7YixyeOCIfeCR6CYCaa3Smt90Ubqc35HlECYfLjc0Oz8N bbLdzT/Mcnxk4hGzAO2aDeOOUcj3pFEi8OkMT2T+xAJwaGMKLQ2BusR867IsIivY/X7R eZpqjvDpmh/pA+H/7foBmzTc1D6EBzitE4BpcCl7S/rZh5+3uL06OJ96LNkxMz8OJ4fN QDS4qGZ09x+cu4i2AZSdb3j+Ex1ViEOxgJ96F2Yf7PJN2mbqaRyft3dDRIDwJOBciny3 MIOw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=3pAtFPgvHnO2SjScGb+WcStiNW+rvjoDKiE7Cz2zFPs=; b=M+DLclAhjkNa2uACMrAeGMK1s4AC0lAH48S5TFRAvhcyM1Pn48h0jxKWCP0P+56aYV ZC5SCmSjtoJqcQBzccD+dbnJJOxL9i4zjB5j9Y8oVPjZZuLQyCC1OmBCCOCgzXF2CfMZ 4GzOmhb4lepyNx9PjNOzycyAwRLVEFr/RI/B0FTeJXqQJSNXg4sbnU8iKT2oayFUCu5k xItVso9jCy3v05X2hwbsd8wY+9yu1ebvM2PaY9zdfPV6mokBVpT28/y/mHcczySQIaIX 2JmqKO4yXfQguY++FGAcn5BmweD3mtoYPHGy+Kwj/9ZlfzYqqdA5ajNmvLr5F+DCvH1L wrvg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@Nvidia.com header.s=selector2 header.b=Mk7Z37Il; arc=pass (i=1 spf=pass spfdomain=nvidia.com dmarc=pass fromdomain=nvidia.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=nvidia.com Received: from out1.vger.email (out1.vger.email. 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To allow these host drivers to call the xhci_hub_control() function from within their own hub_control() callback and be built as a module, export the symbol for xhci_hub_control. Signed-off-by: Jim Lin Reviewed-by: Jon Hunter Tested-by: Jon Hunter Acked-by: Thierry Reding --- v5: new change v6: modify commit message v7: change commit message drivers/usb/host/xhci-hub.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index af946c42b6f0..4f20cdae2a89 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1604,6 +1604,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, spin_unlock_irqrestore(&xhci->lock, flags); return retval; } +EXPORT_SYMBOL_GPL(xhci_hub_control); /* * Returns 0 if the status hasn't changed, or the number of bytes in buf. 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Nov 2022 10:20:40.2871 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1ed96838-49a2-4627-ebbb-08dac3ce6227 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT091.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6254 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749194807387557879?= X-GMAIL-MSGID: =?utf-8?q?1749194845785862403?= From: Petlozu Pravareshwar Program USB2 pad PD controls during port connect/disconnect, port suspend/resume, and test mode, to reduce power consumption on disconnect or suspend. Signed-off-by: Petlozu Pravareshwar Co-developed-by: Jim Lin Signed-off-by: Jim Lin Reviewed-by: Jon Hunter Tested-by: Jon Hunter Acked-by: Thierry Reding --- v2: Fix issue that wrong tegra->phys[] may be accessed on tegra124 v3: No change on copyright v4: Remove hcd_to_tegra_xusb() function which is used only once. v5: Update .hub_control in tegra_xhci_overrides (xhci-tegra.c) Invoke xhci_hub_control() directly (xhci-tegra.c) v6: Change author to Petlozu Changed from u32 to u8 for variable enable_utmi_pad_after_lp0_exit Modified tegra_xhci_disable_phy_wake(), tegra_xhci_program_utmi_power_lp0_exit(), tegra_xhci_hub_control() v7: no change drivers/usb/host/xhci-tegra.c | 125 ++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index c8af2cd2216d..b5ed06ddbbac 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -274,6 +274,7 @@ struct tegra_xusb { bool suspended; struct tegra_xusb_context context; + u8 lp0_utmi_pad_mask; }; static struct hc_driver __read_mostly tegra_xhci_hc_driver; @@ -1951,10 +1952,24 @@ static void tegra_xhci_disable_phy_wake(struct tegra_xusb *tegra) struct tegra_xusb_padctl *padctl = tegra->padctl; unsigned int i; + for (i = 0; i < tegra->num_usb_phys; i++) { + struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i); + + if (!phy) + continue; + + if (tegra_xusb_padctl_remote_wake_detected(padctl, phy)) + tegra_phy_xusb_utmi_pad_power_on(phy); + } + for (i = 0; i < tegra->num_phys; i++) { if (!tegra->phys[i]) continue; + if (tegra_xusb_padctl_remote_wake_detected(padctl, tegra->phys[i])) + dev_dbg(tegra->dev, "%pOF remote wake detected\n", + tegra->phys[i]->dev.of_node); + tegra_xusb_padctl_disable_phy_wake(padctl, tegra->phys[i]); } } @@ -1972,6 +1987,28 @@ static void tegra_xhci_disable_phy_sleepwalk(struct tegra_xusb *tegra) } } +static void tegra_xhci_program_utmi_power_lp0_exit(struct tegra_xusb *tegra) +{ + unsigned int i, index_to_usb2; + struct phy *phy; + + for (i = 0; i < tegra->soc->num_types; i++) { + if (strcmp(tegra->soc->phy_types[i].name, "usb2") == 0) + index_to_usb2 = i; + } + + for (i = 0; i < tegra->num_usb_phys; i++) { + if (!is_host_mode_phy(tegra, index_to_usb2, i)) + continue; + + phy = tegra_xusb_get_phy(tegra, "usb2", i); + if (tegra->lp0_utmi_pad_mask & BIT(i)) + tegra_phy_xusb_utmi_pad_power_on(phy); + else + tegra_phy_xusb_utmi_pad_power_down(phy); + } +} + static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool runtime) { struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd); @@ -1980,6 +2017,7 @@ static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool runtime) unsigned int i; int err; u32 usbcmd; + u32 portsc; dev_dbg(dev, "entering ELPG\n"); @@ -1993,6 +2031,15 @@ static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool runtime) goto out; } + for (i = 0; i < tegra->num_usb_phys; i++) { + if (!xhci->usb2_rhub.ports[i]) + continue; + portsc = readl(xhci->usb2_rhub.ports[i]->addr); + tegra->lp0_utmi_pad_mask &= ~BIT(i); + if (((portsc & PORT_PLS_MASK) == XDEV_U3) || ((portsc & DEV_SPEED_MASK) == XDEV_FS)) + tegra->lp0_utmi_pad_mask |= BIT(i); + } + err = xhci_suspend(xhci, wakeup); if (err < 0) { dev_err(tegra->dev, "failed to suspend XHCI: %d\n", err); @@ -2066,6 +2113,8 @@ static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool runtime) phy_power_on(tegra->phys[i]); } + if (tegra->suspended) + tegra_xhci_program_utmi_power_lp0_exit(tegra); tegra_xusb_config(tegra); tegra_xusb_restore_context(tegra); @@ -2437,8 +2486,84 @@ static int tegra_xhci_setup(struct usb_hcd *hcd) return xhci_gen_setup(hcd, tegra_xhci_quirks); } +static int tegra_xhci_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value, u16 index, + char *buf, u16 length) +{ + struct tegra_xusb *tegra = dev_get_drvdata(hcd->self.controller); + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + struct xhci_hub *rhub; + struct xhci_bus_state *bus_state; + int port = (index & 0xff) - 1; + unsigned int i; + struct xhci_port **ports; + u32 portsc; + int ret; + struct phy *phy; + + rhub = &xhci->usb2_rhub; + bus_state = &rhub->bus_state; + if (bus_state->resuming_ports && hcd->speed == HCD_USB2) { + ports = rhub->ports; + i = rhub->num_ports; + while (i--) { + if (!test_bit(i, &bus_state->resuming_ports)) + continue; + portsc = readl(ports[i]->addr); + if ((portsc & PORT_PLS_MASK) == XDEV_RESUME) + tegra_phy_xusb_utmi_pad_power_on( + tegra_xusb_get_phy(tegra, "usb2", (int) i)); + } + } + + if (hcd->speed == HCD_USB2) { + phy = tegra_xusb_get_phy(tegra, "usb2", port); + if ((type_req == ClearPortFeature) && (value == USB_PORT_FEAT_SUSPEND)) { + if (!index || index > rhub->num_ports) + return -EPIPE; + tegra_phy_xusb_utmi_pad_power_on(phy); + } + if ((type_req == SetPortFeature) && (value == USB_PORT_FEAT_RESET)) { + if (!index || index > rhub->num_ports) + return -EPIPE; + ports = rhub->ports; + portsc = readl(ports[port]->addr); + if (portsc & PORT_CONNECT) + tegra_phy_xusb_utmi_pad_power_on(phy); + } + } + + ret = xhci_hub_control(hcd, type_req, value, index, buf, length); + if (ret < 0) + return ret; + + if (hcd->speed == HCD_USB2) { + /* Use phy where we set previously */ + if ((type_req == SetPortFeature) && (value == USB_PORT_FEAT_SUSPEND)) + /* We don't suspend the PAD while HNP role swap happens on the OTG port */ + if (!((hcd->self.otg_port == (port + 1)) && hcd->self.b_hnp_enable)) + tegra_phy_xusb_utmi_pad_power_down(phy); + + if ((type_req == ClearPortFeature) && (value == USB_PORT_FEAT_C_CONNECTION)) { + ports = rhub->ports; + portsc = readl(ports[port]->addr); + if (!(portsc & PORT_CONNECT)) { + /* We don't suspend the PAD while HNP role swap happens on the OTG + * port + */ + if (!((hcd->self.otg_port == (port + 1)) && hcd->self.b_hnp_enable)) + tegra_phy_xusb_utmi_pad_power_down(phy); + } + } + if ((type_req == SetPortFeature) && (value == USB_PORT_FEAT_TEST)) + tegra_phy_xusb_utmi_pad_power_on(phy); + } + + return ret; +} + static const struct xhci_driver_overrides tegra_xhci_overrides __initconst = { .reset = tegra_xhci_setup, + .hub_control = tegra_xhci_hub_control, }; static int __init tegra_xusb_init(void)