diff options
author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-07-15 12:07:58 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-27 16:58:37 +0300 |
commit | 6b587394c65c23d5ba05a33e5899e2ed8dab3c97 (patch) | |
tree | 675abaf38feeb6f7798d562d403f8e1380b0923b /drivers/usb/mtu3/mtu3_plat.c | |
parent | 427c66422e14b8468ee005aa6edf76ef0c2a8fc2 (diff) | |
download | linux-6b587394c65c23d5ba05a33e5899e2ed8dab3c97.tar.xz |
usb: mtu3: support suspend/resume for dual-role mode
Support suspend/resume for dual-role mode including the single
port and multi-ports supported by host controller, when the host
supports mult-ports, only port0 (u2/u3) is used to support dual
role mode.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1626340078-29111-14-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/mtu3/mtu3_plat.c')
-rw-r--r-- | drivers/usb/mtu3/mtu3_plat.c | 84 |
1 files changed, 61 insertions, 23 deletions
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index e174ada689f2..81266f34986f 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -45,6 +45,29 @@ int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks) return 0; } +static int wait_for_ip_sleep(struct ssusb_mtk *ssusb) +{ + bool sleep_check = true; + u32 value; + int ret; + + if (!ssusb->is_host) + sleep_check = ssusb_gadget_ip_sleep_check(ssusb); + + if (!sleep_check) + return 0; + + /* wait for ip enter sleep mode */ + ret = readl_poll_timeout(ssusb->ippc_base + U3D_SSUSB_IP_PW_STS1, value, + (value & SSUSB_IP_SLEEP_STS), 100, 100000); + if (ret) { + dev_err(ssusb->dev, "ip sleep failed!!!\n"); + ret = -EBUSY; + } + + return ret; +} + static int ssusb_phy_init(struct ssusb_mtk *ssusb) { int i; @@ -421,6 +444,28 @@ static int mtu3_remove(struct platform_device *pdev) return 0; } +static int resume_ip_and_ports(struct ssusb_mtk *ssusb, pm_message_t msg) +{ + switch (ssusb->dr_mode) { + case USB_DR_MODE_PERIPHERAL: + ssusb_gadget_resume(ssusb, msg); + break; + case USB_DR_MODE_HOST: + ssusb_host_resume(ssusb, false); + break; + case USB_DR_MODE_OTG: + ssusb_host_resume(ssusb, !ssusb->is_host); + if (!ssusb->is_host) + ssusb_gadget_resume(ssusb, msg); + + break; + default: + return -EINVAL; + } + + return 0; +} + static int mtu3_suspend_common(struct device *dev, pm_message_t msg) { struct ssusb_mtk *ssusb = dev_get_drvdata(dev); @@ -432,26 +477,36 @@ static int mtu3_suspend_common(struct device *dev, pm_message_t msg) case USB_DR_MODE_PERIPHERAL: ret = ssusb_gadget_suspend(ssusb, msg); if (ret) - return ret; + goto err; break; case USB_DR_MODE_HOST: ssusb_host_suspend(ssusb); break; case USB_DR_MODE_OTG: - if (!ssusb->is_host) - return 0; - + if (!ssusb->is_host) { + ret = ssusb_gadget_suspend(ssusb, msg); + if (ret) + goto err; + } ssusb_host_suspend(ssusb); break; default: return -EINVAL; } + + ret = wait_for_ip_sleep(ssusb); + if (ret) + goto sleep_err; + ssusb_phy_power_off(ssusb); clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks); ssusb_wakeup_set(ssusb, true); - return 0; +sleep_err: + resume_ip_and_ports(ssusb, msg); +err: + return ret; } static int mtu3_resume_common(struct device *dev, pm_message_t msg) @@ -470,24 +525,7 @@ static int mtu3_resume_common(struct device *dev, pm_message_t msg) if (ret) goto phy_err; - switch (ssusb->dr_mode) { - case USB_DR_MODE_PERIPHERAL: - ssusb_gadget_resume(ssusb, msg); - break; - case USB_DR_MODE_HOST: - ssusb_host_resume(ssusb, false); - break; - case USB_DR_MODE_OTG: - if (!ssusb->is_host) - return 0; - - ssusb_host_resume(ssusb, true); - break; - default: - return -EINVAL; - } - - return 0; + return resume_ip_and_ports(ssusb, msg); phy_err: clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks); |