* [PATCH usb-next v9 1/8] dt-bindings: usb: add the documentation for USB HCDs
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
@ 2018-02-11 21:06 ` Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 2/8] usb: add a flag to skip PHY initialization to struct usb_hcd Martin Blumenstingl
` (6 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
A USB HCD may have several PHYs which need to be configured before the
the HCD starts working.
This adds the documentation for such a USB HCD as well as a reference to
the new "usb-hcd.txt" from all bindings that implement a USB HCD which
support one USB PHY per port.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Reviewed-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Tested-by: Yixun Lan <yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ@public.gmane.org>
---
Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt | 5 ++++-
Documentation/devicetree/bindings/usb/mediatek,mtu3.txt | 5 ++++-
Documentation/devicetree/bindings/usb/usb-ehci.txt | 6 ++++--
Documentation/devicetree/bindings/usb/usb-hcd.txt | 9 +++++++++
Documentation/devicetree/bindings/usb/usb-ohci.txt | 6 ++++--
Documentation/devicetree/bindings/usb/usb-uhci.txt | 3 +++
Documentation/devicetree/bindings/usb/usb-xhci.txt | 5 +++++
7 files changed, 33 insertions(+), 6 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/usb-hcd.txt
diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
index 88d9f4a4b280..266c2d917a28 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
@@ -32,7 +32,7 @@ Required properties:
"mcu_ck": mcu_bus clock for register access,
"dma_ck": dma_bus clock for data transfer by DMA
- - phys : a list of phandle + phy specifier pairs
+ - phys : see usb-hcd.txt in the current directory
Optional properties:
- wakeup-source : enable USB remote wakeup;
@@ -52,6 +52,9 @@ Optional properties:
See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
- imod-interval-ns: default interrupt moderation interval is 5000ns
+additionally the properties from usb-hcd.txt (in the current directory) are
+supported.
+
Example:
usb30: usb@11270000 {
compatible = "mediatek,mt8173-xhci";
diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
index d589a1ef96a1..3382b5cb471d 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
@@ -17,7 +17,7 @@ Required properties:
- clock-names : must contain "sys_ck" for clock of controller,
the following clocks are optional:
"ref_ck", "mcu_ck" and "dam_ck";
- - phys : a list of phandle + phy specifier pairs
+ - phys : see usb-hcd.txt in the current directory
- dr_mode : should be one of "host", "peripheral" or "otg",
refer to usb/generic.txt
@@ -53,6 +53,9 @@ Optional properties:
- mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
bit1 for u3port1, ... etc;
+additionally the properties from usb-hcd.txt (in the current directory) are
+supported.
+
Sub-nodes:
The xhci should be added as subnode to mtu3 as shown in the following example
if host mode is enabled. The DT binding details of xhci can be found in:
diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
index 3efde12b5d68..0f1b75386207 100644
--- a/Documentation/devicetree/bindings/usb/usb-ehci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt
@@ -16,10 +16,12 @@ Optional properties:
- has-transaction-translator : boolean, set this if EHCI have a Transaction
Translator built into the root hub.
- clocks : a list of phandle + clock specifier pairs
- - phys : phandle + phy specifier pair
- - phy-names : "usb"
+ - phys : see usb-hcd.txt in the current directory
- resets : phandle + reset specifier pair
+additionally the properties from usb-hcd.txt (in the current directory) are
+supported.
+
Example (Sequoia 440EPx):
ehci@e0000300 {
compatible = "ibm,usb-ehci-440epx", "usb-ehci";
diff --git a/Documentation/devicetree/bindings/usb/usb-hcd.txt b/Documentation/devicetree/bindings/usb/usb-hcd.txt
new file mode 100644
index 000000000000..50529b838c9c
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usb-hcd.txt
@@ -0,0 +1,9 @@
+Generic USB HCD (Host Controller Device) Properties
+
+Optional properties:
+- phys: a list of all USB PHYs on this HCD
+
+Example:
+ &usb1 {
+ phys = <&usb2_phy1>, <&usb3_phy1>;
+ };
diff --git a/Documentation/devicetree/bindings/usb/usb-ohci.txt b/Documentation/devicetree/bindings/usb/usb-ohci.txt
index 09e70c875bc6..a8d2103d1f3d 100644
--- a/Documentation/devicetree/bindings/usb/usb-ohci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-ohci.txt
@@ -13,10 +13,12 @@ Optional properties:
- remote-wakeup-connected: remote wakeup is wired on the platform
- num-ports : u32, to override the detected port count
- clocks : a list of phandle + clock specifier pairs
-- phys : phandle + phy specifier pair
-- phy-names : "usb"
+- phys : see usb-hcd.txt in the current directory
- resets : a list of phandle + reset specifier pairs
+additionally the properties from usb-hcd.txt (in the current directory) are
+supported.
+
Example:
ohci0: usb@1c14400 {
diff --git a/Documentation/devicetree/bindings/usb/usb-uhci.txt b/Documentation/devicetree/bindings/usb/usb-uhci.txt
index 298133416c97..cc2e6f7d602e 100644
--- a/Documentation/devicetree/bindings/usb/usb-uhci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-uhci.txt
@@ -6,6 +6,9 @@ Required properties:
- reg : Should contain 1 register ranges(address and length)
- interrupts : UHCI controller interrupt
+additionally the properties from usb-hcd.txt (in the current directory) are
+supported.
+
Example:
uhci@d8007b00 {
diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt
index e2ea59bbca93..2f7663bb69ff 100644
--- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
@@ -32,6 +32,11 @@ Optional properties:
- usb3-lpm-capable: determines if platform is USB3 LPM capable
- quirk-broken-port-ped: set if the controller has broken port disable mechanism
- imod-interval-ns: default interrupt moderation interval is 5000ns
+ - phys : see usb-hcd.txt in the current directory
+
+additionally the properties from usb-hcd.txt (in the current directory) are
+supported.
+
Example:
usb@f0931000 {
--
2.16.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 2/8] usb: add a flag to skip PHY initialization to struct usb_hcd
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2018-02-11 21:06 ` [PATCH usb-next v9 1/8] dt-bindings: usb: add the documentation for USB HCDs Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
[not found] ` <20180211210651.2046-3-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2018-02-11 21:06 ` [PATCH usb-next v9 3/8] usb: core: add a wrapper for the USB PHYs on the HCD Martin Blumenstingl
` (5 subsequent siblings)
7 siblings, 1 reply; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
The USB HCD core driver parses the device-tree node for "phys" and
"usb-phys" properties. It also manages the power state of these PHYs
automatically.
However, drivers may opt-out of this behavior by setting "phy" or
"usb_phy" in struct usb_hcd to a non-null value. An example where this
is required is the "Qualcomm USB2 controller", implemented by the
chipidea driver. The hardware requires that the PHY is only powered on
after the "reset completed" event from the controller is received.
A follow-up patch will allow the USB HCD core driver to manage more than
one PHY. Add a new "bool skip_phy_initialization" field to struct
usb_hcd so drivers can opt-out of any PHY management provided by the USB
HCD core driver. The new field will be used in that patch as well.
This also updates the existing drivers so they use the new flag if they
want to opt out of the PHY management provided by the USB HCD core
driver. This means that for these drivers the new "multiple PHY"
handling (which will be added in a follow-up patch) will be disabled as
well.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
---
drivers/usb/chipidea/host.c | 5 +----
drivers/usb/core/hcd.c | 4 ++--
drivers/usb/host/ehci-fsl.c | 2 ++
drivers/usb/host/ehci-platform.c | 4 ++--
drivers/usb/host/ehci-tegra.c | 1 +
drivers/usb/host/ohci-omap.c | 1 +
drivers/usb/host/ohci-platform.c | 4 ++--
drivers/usb/host/xhci-plat.c | 1 +
include/linux/usb/hcd.h | 6 ++++++
9 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 19d60ed7e41f..493ef826ef4c 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -124,10 +124,7 @@ static int host_start(struct ci_hdrc *ci)
hcd->power_budget = ci->platdata->power_budget;
hcd->tpl_support = ci->platdata->tpl_support;
- if (ci->phy)
- hcd->phy = ci->phy;
- else
- hcd->usb_phy = ci->usb_phy;
+ hcd->skip_phy_initialization = ci->phy || ci->usb_phy;
ehci = hcd_to_ehci(hcd);
ehci->caps = ci->hw_bank.cap;
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index fc32391a34d5..f2307470a31e 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2727,7 +2727,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
int retval;
struct usb_device *rhdev;
- if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->usb_phy) {
+ if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->skip_phy_initialization) {
struct usb_phy *phy = usb_get_phy_dev(hcd->self.sysdev, 0);
if (IS_ERR(phy)) {
@@ -2745,7 +2745,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
}
}
- if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) {
+ if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->skip_phy_initialization) {
struct phy *phy = phy_get(hcd->self.sysdev, "usb");
if (IS_ERR(phy)) {
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index c5094cb88cd5..009de5e4e136 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -155,6 +155,8 @@ static int fsl_ehci_drv_probe(struct platform_device *pdev)
retval = -ENODEV;
goto err2;
}
+
+ hcd->skip_phy_initialization = true;
}
#endif
return retval;
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index b065a960adc2..40fbc4925378 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -219,9 +219,9 @@ static int ehci_platform_probe(struct platform_device *dev)
if (IS_ERR(priv->phys[phy_num])) {
err = PTR_ERR(priv->phys[phy_num]);
goto err_put_hcd;
- } else if (!hcd->phy) {
+ } else {
/* Avoiding phy_get() in usb_add_hcd() */
- hcd->phy = priv->phys[phy_num];
+ hcd->skip_phy_initialization = true;
}
}
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index c809f7d2f08f..9a8442a66b14 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -461,6 +461,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
goto cleanup_clk_en;
}
hcd->usb_phy = u_phy;
+ hcd->skip_phy_initialization = true;
tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node,
"nvidia,needs-double-reset");
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 0201c49bc4fc..2255cbd73fb5 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -230,6 +230,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd)
} else {
return -EPROBE_DEFER;
}
+ hcd->skip_phy_initialization = true;
ohci->start_hnp = start_hnp;
}
#endif
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 1e6c954f4b3f..bd605e79ae7d 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -186,9 +186,9 @@ static int ohci_platform_probe(struct platform_device *dev)
if (IS_ERR(priv->phys[phy_num])) {
err = PTR_ERR(priv->phys[phy_num]);
goto err_put_hcd;
- } else if (!hcd->phy) {
+ } else {
/* Avoiding phy_get() in usb_add_hcd() */
- hcd->phy = priv->phys[phy_num];
+ hcd->skip_phy_initialization = true;
}
}
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 6f038306c14d..ef01bc18bcf3 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -284,6 +284,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
ret = usb_phy_init(hcd->usb_phy);
if (ret)
goto put_usb3_hcd;
+ hcd->skip_phy_initialization = true;
}
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 176900528822..b46fb6dd43ab 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -98,6 +98,12 @@ struct usb_hcd {
*/
const struct hc_driver *driver; /* hw-specific hooks */
+ /*
+ * do not manage the PHY state in the HCD core, instead let the driver
+ * handle this (for example if the PHY can only be turned on after a
+ * specific event)
+ */
+ bool skip_phy_initialization;
/*
* OTG and some Host controllers need software interaction with phys;
* other external phys should be software-transparent
--
2.16.1
--
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^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 3/8] usb: core: add a wrapper for the USB PHYs on the HCD
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
2018-02-11 21:06 ` [PATCH usb-next v9 1/8] dt-bindings: usb: add the documentation for USB HCDs Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 2/8] usb: add a flag to skip PHY initialization to struct usb_hcd Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 4/8] usb: core: hcd: integrate the PHY wrapper into the HCD core Martin Blumenstingl
` (4 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl,
Chunfeng Yun
Many SoC platforms have separate devices for the USB PHY which are
registered through the generic PHY framework. These PHYs have to be
enabled to make the USB controller actually work. They also have to be
disabled again on shutdown/suspend.
Currently (at least) the following HCI platform drivers are using custom
code to obtain all PHYs via devicetree for the roothub/controller and
disable/enable them when required:
- ehci-platform.c has ehci_platform_power_{on,off}
- xhci-mtk.c has xhci_mtk_phy_{init,exit,power_on,power_off}
- ohci-platform.c has ohci_platform_power_{on,off}
With this new wrapper the USB PHYs can be specified directly in the
USB controller's devicetree node (just like on the drivers listed
above). This allows SoCs like the Amlogic Meson GXL family to operate
correctly once this is wired up correctly. These SoCs use a dwc3
controller and require all USB PHYs to be initialized (if one of the USB
PHYs it not initialized then none of USB port works at all).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Tested-by: Yixun Lan <yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ@public.gmane.org>
Cc: Neil Armstrong <narmstrong-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
Cc: Chunfeng Yun <chunfeng.yun-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
drivers/usb/core/Makefile | 2 +-
drivers/usb/core/phy.c | 158 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/usb/core/phy.h | 7 ++
3 files changed, 166 insertions(+), 1 deletion(-)
create mode 100644 drivers/usb/core/phy.c
create mode 100644 drivers/usb/core/phy.h
diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index 92c9cefb4317..18e874b0441e 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -6,7 +6,7 @@
usbcore-y := usb.o hub.o hcd.o urb.o message.o driver.o
usbcore-y += config.o file.o buffer.o sysfs.o endpoint.o
usbcore-y += devio.o notify.o generic.o quirks.o devices.o
-usbcore-y += port.o
+usbcore-y += phy.o port.o
usbcore-$(CONFIG_OF) += of.o
usbcore-$(CONFIG_USB_PCI) += hcd-pci.o
diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c
new file mode 100644
index 000000000000..09b7c43c0ea4
--- /dev/null
+++ b/drivers/usb/core/phy.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * A wrapper for multiple PHYs which passes all phy_* function calls to
+ * multiple (actual) PHY devices. This is comes handy when initializing
+ * all PHYs on a HCD and to keep them all in the same state.
+ *
+ * Copyright (C) 2018 Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/phy/phy.h>
+#include <linux/of.h>
+
+#include "phy.h"
+
+struct usb_phy_roothub {
+ struct phy *phy;
+ struct list_head list;
+};
+
+static struct usb_phy_roothub *usb_phy_roothub_alloc(struct device *dev)
+{
+ struct usb_phy_roothub *roothub_entry;
+
+ roothub_entry = devm_kzalloc(dev, sizeof(*roothub_entry), GFP_KERNEL);
+ if (!roothub_entry)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&roothub_entry->list);
+
+ return roothub_entry;
+}
+
+static int usb_phy_roothub_add_phy(struct device *dev, int index,
+ struct list_head *list)
+{
+ struct usb_phy_roothub *roothub_entry;
+ struct phy *phy = devm_of_phy_get_by_index(dev, dev->of_node, index);
+
+ if (IS_ERR_OR_NULL(phy)) {
+ if (!phy || PTR_ERR(phy) == -ENODEV)
+ return 0;
+ else
+ return PTR_ERR(phy);
+ }
+
+ roothub_entry = usb_phy_roothub_alloc(dev);
+ if (IS_ERR(roothub_entry))
+ return PTR_ERR(roothub_entry);
+
+ roothub_entry->phy = phy;
+
+ list_add_tail(&roothub_entry->list, list);
+
+ return 0;
+}
+
+struct usb_phy_roothub *usb_phy_roothub_init(struct device *dev)
+{
+ struct usb_phy_roothub *phy_roothub;
+ struct usb_phy_roothub *roothub_entry;
+ struct list_head *head;
+ int i, num_phys, err;
+
+ num_phys = of_count_phandle_with_args(dev->of_node, "phys",
+ "#phy-cells");
+ if (num_phys <= 0)
+ return NULL;
+
+ phy_roothub = usb_phy_roothub_alloc(dev);
+ if (IS_ERR(phy_roothub))
+ return phy_roothub;
+
+ for (i = 0; i < num_phys; i++) {
+ err = usb_phy_roothub_add_phy(dev, i, &phy_roothub->list);
+ if (err)
+ goto err_out;
+ }
+
+ head = &phy_roothub->list;
+
+ list_for_each_entry(roothub_entry, head, list) {
+ err = phy_init(roothub_entry->phy);
+ if (err)
+ goto err_exit_phys;
+ }
+
+ return phy_roothub;
+
+err_exit_phys:
+ list_for_each_entry_continue_reverse(roothub_entry, head, list)
+ phy_exit(roothub_entry->phy);
+
+err_out:
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(usb_phy_roothub_init);
+
+int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub)
+{
+ struct usb_phy_roothub *roothub_entry;
+ struct list_head *head;
+ int err, ret = 0;
+
+ if (!phy_roothub)
+ return 0;
+
+ head = &phy_roothub->list;
+
+ list_for_each_entry(roothub_entry, head, list) {
+ err = phy_exit(roothub_entry->phy);
+ if (err)
+ ret = ret;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_phy_roothub_exit);
+
+int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub)
+{
+ struct usb_phy_roothub *roothub_entry;
+ struct list_head *head;
+ int err;
+
+ if (!phy_roothub)
+ return 0;
+
+ head = &phy_roothub->list;
+
+ list_for_each_entry(roothub_entry, head, list) {
+ err = phy_power_on(roothub_entry->phy);
+ if (err)
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ list_for_each_entry_continue_reverse(roothub_entry, head, list)
+ phy_power_off(roothub_entry->phy);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(usb_phy_roothub_power_on);
+
+void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub)
+{
+ struct usb_phy_roothub *roothub_entry;
+
+ if (!phy_roothub)
+ return;
+
+ list_for_each_entry_reverse(roothub_entry, &phy_roothub->list, list)
+ phy_power_off(roothub_entry->phy);
+}
+EXPORT_SYMBOL_GPL(usb_phy_roothub_power_off);
diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h
new file mode 100644
index 000000000000..6fde59bfbff8
--- /dev/null
+++ b/drivers/usb/core/phy.h
@@ -0,0 +1,7 @@
+struct usb_phy_roothub;
+
+struct usb_phy_roothub *usb_phy_roothub_init(struct device *dev);
+int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub);
+
+int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub);
+void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub);
--
2.16.1
--
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^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 4/8] usb: core: hcd: integrate the PHY wrapper into the HCD core
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
` (2 preceding siblings ...)
2018-02-11 21:06 ` [PATCH usb-next v9 3/8] usb: core: add a wrapper for the USB PHYs on the HCD Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 5/8] usb: host: xhci-mtk: remove custom USB PHY handling Martin Blumenstingl
` (3 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
This integrates the PHY wrapper into the core hcd infrastructure.
Multiple PHYs which are part of the HCD's device tree node are now
managed (= powered on/off when needed), by the new usb_phy_roothub code.
Suspend and resume is also supported, however not for
runtime/auto-suspend (which is triggered for example when no devices are
connected to the USB bus). This is needed on some SoCs (for example
Amlogic Meson GXL) because if the PHYs are disabled during auto-suspend
then devices which are plugged in afterwards are not seen by the host.
One example where this is required is the Amlogic GXL and GXM SoCs:
They are using a dwc3 USB controller with up to three ports enabled on
the internal roothub. Each port has it's own PHY which must be enabled
(if one of the PHYs is left disabled then none of the USB ports works at
all).
The new logic works on the Amlogic GXL and GXM SoCs because the dwc3
driver internally creates a xhci-hcd which then registers a HCD which
then triggers our new PHY wrapper.
USB controller drivers can opt out of this by setting
"skip_phy_initialization" in struct usb_hcd to true. This is identical
to how it works for a single USB PHY, so the "multiple PHY" handling is
disabled for drivers that opted out of the management logic of a single
PHY.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Acked-by: Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>
Acked-by: Chunfeng Yun <chunfeng.yun-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
Tested-by: Yixun Lan <yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ@public.gmane.org>
---
drivers/usb/core/hcd.c | 31 +++++++++++++++++++++++++++++++
include/linux/usb/hcd.h | 1 +
2 files changed, 32 insertions(+)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index f2307470a31e..32797c25ac3b 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -37,6 +37,7 @@
#include <linux/usb/otg.h>
#include "usb.h"
+#include "phy.h"
/*-------------------------------------------------------------------------*/
@@ -2260,6 +2261,9 @@ int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
usb_set_device_state(rhdev, USB_STATE_SUSPENDED);
hcd->state = HC_STATE_SUSPENDED;
+ if (!PMSG_IS_AUTO(msg))
+ usb_phy_roothub_power_off(hcd->phy_roothub);
+
/* Did we race with a root-hub wakeup event? */
if (rhdev->do_remote_wakeup) {
char buffer[6];
@@ -2296,6 +2300,13 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume");
return 0;
}
+
+ if (!PMSG_IS_AUTO(msg)) {
+ status = usb_phy_roothub_power_on(hcd->phy_roothub);
+ if (status)
+ return status;
+ }
+
if (!hcd->driver->bus_resume)
return -ENOENT;
if (HCD_RH_RUNNING(hcd))
@@ -2333,6 +2344,7 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
}
} else {
hcd->state = old_state;
+ usb_phy_roothub_power_off(hcd->phy_roothub);
dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
"resume", status);
if (status != -ESHUTDOWN)
@@ -2769,6 +2781,18 @@ int usb_add_hcd(struct usb_hcd *hcd,
}
}
+ if (!hcd->skip_phy_initialization) {
+ hcd->phy_roothub = usb_phy_roothub_init(hcd->self.sysdev);
+ if (IS_ERR(hcd->phy_roothub)) {
+ retval = PTR_ERR(hcd->phy_roothub);
+ goto err_phy_roothub_init;
+ }
+
+ retval = usb_phy_roothub_power_on(hcd->phy_roothub);
+ if (retval)
+ goto err_usb_phy_roothub_power_on;
+ }
+
dev_info(hcd->self.controller, "%s\n", hcd->product_desc);
/* Keep old behaviour if authorized_default is not in [0, 1]. */
@@ -2933,6 +2957,10 @@ int usb_add_hcd(struct usb_hcd *hcd,
err_register_bus:
hcd_buffer_destroy(hcd);
err_create_buf:
+ usb_phy_roothub_power_off(hcd->phy_roothub);
+err_usb_phy_roothub_power_on:
+ usb_phy_roothub_exit(hcd->phy_roothub);
+err_phy_roothub_init:
if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
phy_power_off(hcd->phy);
phy_exit(hcd->phy);
@@ -3017,6 +3045,9 @@ void usb_remove_hcd(struct usb_hcd *hcd)
usb_deregister_bus(&hcd->self);
hcd_buffer_destroy(hcd);
+ usb_phy_roothub_power_off(hcd->phy_roothub);
+ usb_phy_roothub_exit(hcd->phy_roothub);
+
if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
phy_power_off(hcd->phy);
phy_exit(hcd->phy);
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index b46fb6dd43ab..b85e3d4fb0c5 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -110,6 +110,7 @@ struct usb_hcd {
*/
struct usb_phy *usb_phy;
struct phy *phy;
+ struct usb_phy_roothub *phy_roothub;
/* Flags that need to be manipulated atomically because they can
* change while the host controller is running. Always use
--
2.16.1
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 5/8] usb: host: xhci-mtk: remove custom USB PHY handling
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
` (3 preceding siblings ...)
2018-02-11 21:06 ` [PATCH usb-next v9 4/8] usb: core: hcd: integrate the PHY wrapper into the HCD core Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 6/8] usb: host: ehci-platform: " Martin Blumenstingl
` (2 subsequent siblings)
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the xhci-mtk driver as the core
HCD code now handles this.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
---
drivers/usb/host/xhci-mtk.c | 98 +--------------------------------------------
1 file changed, 2 insertions(+), 96 deletions(-)
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index b0ab4d5e2751..7334da9e9779 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -14,7 +14,6 @@
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
@@ -352,62 +351,6 @@ static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
static struct hc_driver __read_mostly xhci_mtk_hc_driver;
-static int xhci_mtk_phy_init(struct xhci_hcd_mtk *mtk)
-{
- int i;
- int ret;
-
- for (i = 0; i < mtk->num_phys; i++) {
- ret = phy_init(mtk->phys[i]);
- if (ret)
- goto exit_phy;
- }
- return 0;
-
-exit_phy:
- for (; i > 0; i--)
- phy_exit(mtk->phys[i - 1]);
-
- return ret;
-}
-
-static int xhci_mtk_phy_exit(struct xhci_hcd_mtk *mtk)
-{
- int i;
-
- for (i = 0; i < mtk->num_phys; i++)
- phy_exit(mtk->phys[i]);
-
- return 0;
-}
-
-static int xhci_mtk_phy_power_on(struct xhci_hcd_mtk *mtk)
-{
- int i;
- int ret;
-
- for (i = 0; i < mtk->num_phys; i++) {
- ret = phy_power_on(mtk->phys[i]);
- if (ret)
- goto power_off_phy;
- }
- return 0;
-
-power_off_phy:
- for (; i > 0; i--)
- phy_power_off(mtk->phys[i - 1]);
-
- return ret;
-}
-
-static void xhci_mtk_phy_power_off(struct xhci_hcd_mtk *mtk)
-{
- unsigned int i;
-
- for (i = 0; i < mtk->num_phys; i++)
- phy_power_off(mtk->phys[i]);
-}
-
static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk)
{
int ret;
@@ -488,8 +431,6 @@ static int xhci_mtk_probe(struct platform_device *pdev)
struct xhci_hcd *xhci;
struct resource *res;
struct usb_hcd *hcd;
- struct phy *phy;
- int phy_num;
int ret = -ENODEV;
int irq;
@@ -529,16 +470,6 @@ static int xhci_mtk_probe(struct platform_device *pdev)
return ret;
}
- mtk->num_phys = of_count_phandle_with_args(node,
- "phys", "#phy-cells");
- if (mtk->num_phys > 0) {
- mtk->phys = devm_kcalloc(dev, mtk->num_phys,
- sizeof(*mtk->phys), GFP_KERNEL);
- if (!mtk->phys)
- return -ENOMEM;
- } else {
- mtk->num_phys = 0;
- }
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
device_enable_async_suspend(dev);
@@ -596,23 +527,6 @@ static int xhci_mtk_probe(struct platform_device *pdev)
mtk->has_ippc = false;
}
- for (phy_num = 0; phy_num < mtk->num_phys; phy_num++) {
- phy = devm_of_phy_get_by_index(dev, node, phy_num);
- if (IS_ERR(phy)) {
- ret = PTR_ERR(phy);
- goto put_usb2_hcd;
- }
- mtk->phys[phy_num] = phy;
- }
-
- ret = xhci_mtk_phy_init(mtk);
- if (ret)
- goto put_usb2_hcd;
-
- ret = xhci_mtk_phy_power_on(mtk);
- if (ret)
- goto exit_phys;
-
device_init_wakeup(dev, true);
xhci = hcd_to_xhci(hcd);
@@ -630,7 +544,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
dev_name(dev), hcd);
if (!xhci->shared_hcd) {
ret = -ENOMEM;
- goto power_off_phys;
+ goto disable_device_wakeup;
}
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
@@ -653,13 +567,9 @@ static int xhci_mtk_probe(struct platform_device *pdev)
xhci_mtk_sch_exit(mtk);
usb_put_hcd(xhci->shared_hcd);
-power_off_phys:
- xhci_mtk_phy_power_off(mtk);
+disable_device_wakeup:
device_init_wakeup(dev, false);
-exit_phys:
- xhci_mtk_phy_exit(mtk);
-
put_usb2_hcd:
usb_put_hcd(hcd);
@@ -682,8 +592,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
usb_remove_hcd(xhci->shared_hcd);
- xhci_mtk_phy_power_off(mtk);
- xhci_mtk_phy_exit(mtk);
device_init_wakeup(&dev->dev, false);
usb_remove_hcd(hcd);
@@ -718,7 +626,6 @@ static int __maybe_unused xhci_mtk_suspend(struct device *dev)
del_timer_sync(&xhci->shared_hcd->rh_timer);
xhci_mtk_host_disable(mtk);
- xhci_mtk_phy_power_off(mtk);
xhci_mtk_clks_disable(mtk);
usb_wakeup_set(mtk, true);
return 0;
@@ -732,7 +639,6 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
usb_wakeup_set(mtk, false);
xhci_mtk_clks_enable(mtk);
- xhci_mtk_phy_power_on(mtk);
xhci_mtk_host_enable(mtk);
xhci_dbg(xhci, "%s: restart port polling\n", __func__);
--
2.16.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 6/8] usb: host: ehci-platform: remove custom USB PHY handling
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
` (4 preceding siblings ...)
2018-02-11 21:06 ` [PATCH usb-next v9 5/8] usb: host: xhci-mtk: remove custom USB PHY handling Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 7/8] usb: host: ohci-platform: " Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 8/8] usb: core: hcd: remove support for initializing a single PHY Martin Blumenstingl
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the ehci-platform driver as the
core HCD code now handles this.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Acked-by: Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>
---
drivers/usb/host/ehci-platform.c | 55 +++-------------------------------------
1 file changed, 4 insertions(+), 51 deletions(-)
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 40fbc4925378..4c306fb6b069 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -27,7 +27,6 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/usb.h>
@@ -44,8 +43,6 @@
struct ehci_platform_priv {
struct clk *clks[EHCI_MAX_CLKS];
struct reset_control *rsts;
- struct phy **phys;
- int num_phys;
bool reset_on_resume;
};
@@ -80,7 +77,7 @@ static int ehci_platform_power_on(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
- int clk, ret, phy_num;
+ int clk, ret;
for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
ret = clk_prepare_enable(priv->clks[clk]);
@@ -88,24 +85,8 @@ static int ehci_platform_power_on(struct platform_device *dev)
goto err_disable_clks;
}
- for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
- ret = phy_init(priv->phys[phy_num]);
- if (ret)
- goto err_exit_phy;
- ret = phy_power_on(priv->phys[phy_num]);
- if (ret) {
- phy_exit(priv->phys[phy_num]);
- goto err_exit_phy;
- }
- }
-
return 0;
-err_exit_phy:
- while (--phy_num >= 0) {
- phy_power_off(priv->phys[phy_num]);
- phy_exit(priv->phys[phy_num]);
- }
err_disable_clks:
while (--clk >= 0)
clk_disable_unprepare(priv->clks[clk]);
@@ -117,12 +98,7 @@ static void ehci_platform_power_off(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
- int clk, phy_num;
-
- for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
- phy_power_off(priv->phys[phy_num]);
- phy_exit(priv->phys[phy_num]);
- }
+ int clk;
for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
if (priv->clks[clk])
@@ -149,7 +125,7 @@ static int ehci_platform_probe(struct platform_device *dev)
struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ehci_platform_priv *priv;
struct ehci_hcd *ehci;
- int err, irq, phy_num, clk = 0;
+ int err, irq, clk = 0;
if (usb_disabled())
return -ENODEV;
@@ -202,29 +178,6 @@ static int ehci_platform_probe(struct platform_device *dev)
"has-transaction-translator"))
hcd->has_tt = 1;
- priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
- "phys", "#phy-cells");
-
- if (priv->num_phys > 0) {
- priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
- sizeof(struct phy *), GFP_KERNEL);
- if (!priv->phys)
- return -ENOMEM;
- } else
- priv->num_phys = 0;
-
- for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
- priv->phys[phy_num] = devm_of_phy_get_by_index(
- &dev->dev, dev->dev.of_node, phy_num);
- if (IS_ERR(priv->phys[phy_num])) {
- err = PTR_ERR(priv->phys[phy_num]);
- goto err_put_hcd;
- } else {
- /* Avoiding phy_get() in usb_add_hcd() */
- hcd->skip_phy_initialization = true;
- }
- }
-
for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
if (IS_ERR(priv->clks[clk])) {
@@ -306,7 +259,7 @@ static int ehci_platform_probe(struct platform_device *dev)
err_put_clks:
while (--clk >= 0)
clk_put(priv->clks[clk]);
-err_put_hcd:
+
if (pdata == &ehci_platform_defaults)
dev->dev.platform_data = NULL;
--
2.16.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 7/8] usb: host: ohci-platform: remove custom USB PHY handling
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
` (5 preceding siblings ...)
2018-02-11 21:06 ` [PATCH usb-next v9 6/8] usb: host: ehci-platform: " Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
2018-02-11 21:06 ` [PATCH usb-next v9 8/8] usb: core: hcd: remove support for initializing a single PHY Martin Blumenstingl
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the ohci-platform driver as the
core HCD code now handles this.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
Acked-by: Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>
---
drivers/usb/host/ohci-platform.c | 56 ++++------------------------------------
1 file changed, 5 insertions(+), 51 deletions(-)
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index bd605e79ae7d..65a1c3fdc88c 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -21,7 +21,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
-#include <linux/phy/phy.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
@@ -38,8 +38,6 @@
struct ohci_platform_priv {
struct clk *clks[OHCI_MAX_CLKS];
struct reset_control *resets;
- struct phy **phys;
- int num_phys;
};
static const char hcd_name[] = "ohci-platform";
@@ -48,7 +46,7 @@ static int ohci_platform_power_on(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
- int clk, ret, phy_num;
+ int clk, ret;
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
ret = clk_prepare_enable(priv->clks[clk]);
@@ -56,24 +54,8 @@ static int ohci_platform_power_on(struct platform_device *dev)
goto err_disable_clks;
}
- for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
- ret = phy_init(priv->phys[phy_num]);
- if (ret)
- goto err_exit_phy;
- ret = phy_power_on(priv->phys[phy_num]);
- if (ret) {
- phy_exit(priv->phys[phy_num]);
- goto err_exit_phy;
- }
- }
-
return 0;
-err_exit_phy:
- while (--phy_num >= 0) {
- phy_power_off(priv->phys[phy_num]);
- phy_exit(priv->phys[phy_num]);
- }
err_disable_clks:
while (--clk >= 0)
clk_disable_unprepare(priv->clks[clk]);
@@ -85,12 +67,7 @@ static void ohci_platform_power_off(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
- int clk, phy_num;
-
- for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
- phy_power_off(priv->phys[phy_num]);
- phy_exit(priv->phys[phy_num]);
- }
+ int clk;
for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
if (priv->clks[clk])
@@ -117,7 +94,7 @@ static int ohci_platform_probe(struct platform_device *dev)
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ohci_platform_priv *priv;
struct ohci_hcd *ohci;
- int err, irq, phy_num, clk = 0;
+ int err, irq, clk = 0;
if (usb_disabled())
return -ENODEV;
@@ -169,29 +146,6 @@ static int ohci_platform_probe(struct platform_device *dev)
of_property_read_u32(dev->dev.of_node, "num-ports",
&ohci->num_ports);
- priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
- "phys", "#phy-cells");
-
- if (priv->num_phys > 0) {
- priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
- sizeof(struct phy *), GFP_KERNEL);
- if (!priv->phys)
- return -ENOMEM;
- } else
- priv->num_phys = 0;
-
- for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
- priv->phys[phy_num] = devm_of_phy_get_by_index(
- &dev->dev, dev->dev.of_node, phy_num);
- if (IS_ERR(priv->phys[phy_num])) {
- err = PTR_ERR(priv->phys[phy_num]);
- goto err_put_hcd;
- } else {
- /* Avoiding phy_get() in usb_add_hcd() */
- hcd->skip_phy_initialization = true;
- }
- }
-
for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
if (IS_ERR(priv->clks[clk])) {
@@ -277,7 +231,7 @@ static int ohci_platform_probe(struct platform_device *dev)
err_put_clks:
while (--clk >= 0)
clk_put(priv->clks[clk]);
-err_put_hcd:
+
if (pdata == &ohci_platform_defaults)
dev->dev.platform_data = NULL;
--
2.16.1
--
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the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH usb-next v9 8/8] usb: core: hcd: remove support for initializing a single PHY
[not found] ` <20180211210651.2046-1-martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
` (6 preceding siblings ...)
2018-02-11 21:06 ` [PATCH usb-next v9 7/8] usb: host: ohci-platform: " Martin Blumenstingl
@ 2018-02-11 21:06 ` Martin Blumenstingl
7 siblings, 0 replies; 12+ messages in thread
From: Martin Blumenstingl @ 2018-02-11 21:06 UTC (permalink / raw)
To: linux-usb-u79uwXL29TY76Z2rM5mHXA,
mathias.nyman-ral2JQCrhuEAvxtiuMwx3w, arnd-r2nGTMty4D4,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r,
felipe.balbi-VuQAYsv1563Yd54FQh9/CA
Cc: linux-omap-u79uwXL29TY76Z2rM5mHXA,
linux-tegra-u79uwXL29TY76Z2rM5mHXA,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
jonathanh-DDmLM1+adcrQT0dZR+AlfA,
thierry.reding-Re5JQEeQqe8AvxtiuMwx3w,
stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz,
linux-ci5G2KO2hbZ+pU9mqzGVBQ, Peter.Chen-3arQi8VN3Tc,
matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w, mark.rutland-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
narmstrong-rdvid1DuHRBWk0Htik3J/w,
linux-amlogic-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
yixun.lan-LpR1jeaWuhtBDgjK7y7TUQ, Martin Blumenstingl
With the new PHY wrapper in place we can now handle multiple PHYs.
Remove the code which handles only one generic PHY as this is now
covered (with support for multiple PHYs as well as suspend/resume
support) by the new PHY wrapper.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
---
drivers/usb/core/hcd.c | 37 -------------------------------------
include/linux/usb/hcd.h | 1 -
2 files changed, 38 deletions(-)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 32797c25ac3b..5a92d8f7c484 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2757,30 +2757,6 @@ int usb_add_hcd(struct usb_hcd *hcd,
}
}
- if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->skip_phy_initialization) {
- struct phy *phy = phy_get(hcd->self.sysdev, "usb");
-
- if (IS_ERR(phy)) {
- retval = PTR_ERR(phy);
- if (retval == -EPROBE_DEFER)
- goto err_phy;
- } else {
- retval = phy_init(phy);
- if (retval) {
- phy_put(phy);
- goto err_phy;
- }
- retval = phy_power_on(phy);
- if (retval) {
- phy_exit(phy);
- phy_put(phy);
- goto err_phy;
- }
- hcd->phy = phy;
- hcd->remove_phy = 1;
- }
- }
-
if (!hcd->skip_phy_initialization) {
hcd->phy_roothub = usb_phy_roothub_init(hcd->self.sysdev);
if (IS_ERR(hcd->phy_roothub)) {
@@ -2961,13 +2937,6 @@ int usb_add_hcd(struct usb_hcd *hcd,
err_usb_phy_roothub_power_on:
usb_phy_roothub_exit(hcd->phy_roothub);
err_phy_roothub_init:
- if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
- phy_power_off(hcd->phy);
- phy_exit(hcd->phy);
- phy_put(hcd->phy);
- hcd->phy = NULL;
- }
-err_phy:
if (hcd->remove_phy && hcd->usb_phy) {
usb_phy_shutdown(hcd->usb_phy);
usb_put_phy(hcd->usb_phy);
@@ -3048,12 +3017,6 @@ void usb_remove_hcd(struct usb_hcd *hcd)
usb_phy_roothub_power_off(hcd->phy_roothub);
usb_phy_roothub_exit(hcd->phy_roothub);
- if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
- phy_power_off(hcd->phy);
- phy_exit(hcd->phy);
- phy_put(hcd->phy);
- hcd->phy = NULL;
- }
if (hcd->remove_phy && hcd->usb_phy) {
usb_phy_shutdown(hcd->usb_phy);
usb_put_phy(hcd->usb_phy);
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index b85e3d4fb0c5..68694afd4a46 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -109,7 +109,6 @@ struct usb_hcd {
* other external phys should be software-transparent
*/
struct usb_phy *usb_phy;
- struct phy *phy;
struct usb_phy_roothub *phy_roothub;
/* Flags that need to be manipulated atomically because they can
--
2.16.1
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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^ permalink raw reply related [flat|nested] 12+ messages in thread