From 2cdcec4fedd6a5ee77bd551e6be7505f2230cd43 Mon Sep 17 00:00:00 2001 From: Tuomas Tynkkynen Date: Mon, 12 Aug 2013 16:06:49 +0300 Subject: [PATCH] usb: host: add has_tdi_phy_lpm capability bit The has_hostpc capability bit indicates that the host controller has the HOSTPC register extensions, but at the same time enables clock disabling power saving features with the PHY Low Power Clock Disable (PHCD) bit. However, some host controllers have the HOSTPC extensions but don't support the low-power feature, so the PHCD bit must not be set on those controllers. Add a separate capability bit for the low-power feature instead, and change all existing users of has_hostpc to use this new capability bit. The idea for this commit is taken from an old 2012 commit that never got merged ("disociate chipidea PHY low power suspend control from hostpc") Inspired-by: Matthieu CASTET Signed-off-by: Tuomas Tynkkynen Acked-by: Alan Stern Tested-by: Stephen Warren Reviewed-by: Stephen Warren Signed-off-by: Felipe Balbi --- drivers/usb/chipidea/host.c | 1 + drivers/usb/host/ehci-hub.c | 14 +++++++------- drivers/usb/host/ehci.h | 1 + 3 files changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index 40d0fda4f66c..9b3aaf132bc3 100644 --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -63,6 +63,7 @@ static int host_start(struct ci_hdrc *ci) ehci = hcd_to_ehci(hcd); ehci->caps = ci->hw_bank.cap; ehci->has_hostpc = ci->hw_bank.lpm; + ehci->has_tdi_phy_lpm = ci->hw_bank.lpm; ret = usb_add_hcd(hcd, 0, 0); if (ret) diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 6dce37555c4f..6280bd269e12 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -183,7 +183,7 @@ static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, spin_lock_irq(&ehci->lock); /* clear phy low-power mode before changing wakeup flags */ - if (ehci->has_hostpc) { + if (ehci->has_tdi_phy_lpm) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; @@ -217,7 +217,7 @@ static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, } /* enter phy low-power mode again */ - if (ehci->has_hostpc) { + if (ehci->has_tdi_phy_lpm) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; @@ -309,7 +309,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) } } - if (changed && ehci->has_hostpc) { + if (changed && ehci->has_tdi_phy_lpm) { spin_unlock_irq(&ehci->lock); msleep(5); /* 5 ms for HCD to enter low-power mode */ spin_lock_irq(&ehci->lock); @@ -435,7 +435,7 @@ static int ehci_bus_resume (struct usb_hcd *hcd) goto shutdown; /* clear phy low-power mode before resume */ - if (ehci->bus_suspended && ehci->has_hostpc) { + if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { i = HCS_N_PORTS(ehci->hcs_params); while (i--) { if (test_bit(i, &ehci->bus_suspended)) { @@ -788,7 +788,7 @@ static int ehci_hub_control ( goto error; /* clear phy low-power mode before resume */ - if (ehci->has_hostpc) { + if (ehci->has_tdi_phy_lpm) { temp1 = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, hostpc_reg); @@ -1032,12 +1032,12 @@ static int ehci_hub_control ( /* After above check the port must be connected. * Set appropriate bit thus could put phy into low power - * mode if we have hostpc feature + * mode if we have tdi_phy_lpm feature */ temp &= ~PORT_WKCONN_E; temp |= PORT_WKDISC_E | PORT_WKOC_E; ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); - if (ehci->has_hostpc) { + if (ehci->has_tdi_phy_lpm) { spin_unlock_irqrestore(&ehci->lock, flags); msleep(5);/* 5ms for HCD enter low pwr mode */ spin_lock_irqsave(&ehci->lock, flags); diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 64f9a08e959c..d034d94a7fea 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -210,6 +210,7 @@ struct ehci_hcd { /* one per controller */ #define OHCI_HCCTRL_LEN 0x4 __hc32 *ohci_hcctrl_reg; unsigned has_hostpc:1; + unsigned has_tdi_phy_lpm:1; unsigned has_ppcd:1; /* support per-port change bits */ u8 sbrn; /* packed release number */ -- GitLab