* [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy
@ 2020-07-09 10:58 Peter Chen
2020-07-09 10:59 ` [PATCH 2/4] usb: chipidea: imx: add two picophy parameters tuning implementation Peter Chen
` (3 more replies)
0 siblings, 4 replies; 8+ messages in thread
From: Peter Chen @ 2020-07-09 10:58 UTC (permalink / raw)
To: shawnguo, robh+dt
Cc: devicetree, Peter Chen, linux-usb, linux-imx, kernel,
fabio.estevam, linux-arm-kernel, jun.li
Add two parameters which are used to tune USB signal for imx picophy,
picophy is used at imx7d, imx8mm, and imx8mn.
Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index 51376cbe5f3d..e9858dafb08f 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -100,6 +100,13 @@ i.mx specific properties
It's recommended to specify the over current polarity.
- power-active-high: power signal polarity is active high
- external-vbus-divider: enables off-chip resistor divider for Vbus
+- picophy,pre-emp-curr-control: HS Transmitter Pre-Emphasis Current
+ Control. This signal controls the amount of current sourced to the
+ USB_OTG*_DP and USB_OTG*_DN pins after a J-to-K or K-to-J transition.
+ Details can refer to TXPREEMPAMPTUNE0 bits of USBNC_n_PHY_CFG1.
+- picophy,dc-vol-level-adjust: HS DC Voltage Level Adjustment.
+ Adjust the high-speed transmitter DC level voltage, details can refer
+ to TXVREFTUNE0 bits of USBNC_n_PHY_CFG1.
Example:
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/4] usb: chipidea: imx: add two picophy parameters tuning implementation
2020-07-09 10:58 [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Peter Chen
@ 2020-07-09 10:59 ` Peter Chen
2020-07-09 10:59 ` [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning Peter Chen
` (2 subsequent siblings)
3 siblings, 0 replies; 8+ messages in thread
From: Peter Chen @ 2020-07-09 10:59 UTC (permalink / raw)
To: shawnguo, robh+dt
Cc: devicetree, Peter Chen, linux-usb, linux-imx, kernel,
fabio.estevam, linux-arm-kernel, jun.li
These two parameters are used to improve USB signal for board level,
in this commit, we read it from the dtb, and write to related register
during the initialization.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
drivers/usb/chipidea/ci_hdrc_imx.c | 5 +++++
drivers/usb/chipidea/ci_hdrc_imx.h | 2 ++
drivers/usb/chipidea/usbmisc_imx.c | 21 +++++++++++++++++++++
3 files changed, 28 insertions(+)
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
index 5ae16368a0c7..58de0f3ac0e9 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.c
+++ b/drivers/usb/chipidea/ci_hdrc_imx.c
@@ -165,6 +165,11 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
data->ulpi = 1;
+ of_property_read_u32(np, "picophy,pre-emp-curr-control",
+ &data->emp_curr_control);
+ of_property_read_u32(np, "picophy,dc-vol-level-adjust",
+ &data->dc_vol_level_adjust);
+
return data;
}
diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h b/drivers/usb/chipidea/ci_hdrc_imx.h
index 727d02b6dbd3..367bb0d0cb6b 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.h
+++ b/drivers/usb/chipidea/ci_hdrc_imx.h
@@ -25,6 +25,8 @@ struct imx_usbmisc_data {
unsigned int ext_id:1; /* ID from exteranl event */
unsigned int ext_vbus:1; /* Vbus from exteranl event */
struct usb_phy *usb_phy;
+ int emp_curr_control;
+ int dc_vol_level_adjust;
};
int imx_usbmisc_init(struct imx_usbmisc_data *data);
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index f136876cb4a3..f9881aed468f 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -128,6 +128,12 @@
#define MX7D_USB_OTG_PHY_STATUS_VBUS_VLD BIT(3)
#define MX7D_USB_OTG_PHY_STATUS_CHRGDET BIT(29)
+#define MX7D_USB_OTG_PHY_CFG1 0x30
+#define TXPREEMPAMPTUNE0_BIT 28
+#define TXPREEMPAMPTUNE0_MASK (3 << 28)
+#define TXVREFTUNE0_BIT 20
+#define TXVREFTUNE0_MASK (0xf << 20)
+
#define MX6_USB_OTG_WAKEUP_BITS (MX6_BM_WAKEUP_ENABLE | MX6_BM_VBUS_WAKEUP | \
MX6_BM_ID_WAKEUP)
@@ -649,6 +655,21 @@ static int usbmisc_imx7d_init(struct imx_usbmisc_data *data)
writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID
| MX7D_USBNC_AUTO_RESUME,
usbmisc->base + MX7D_USBNC_USB_CTRL2);
+ /* PHY tuning for signal quality */
+ reg = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG1);
+ if (data->emp_curr_control && data->emp_curr_control <=
+ (TXPREEMPAMPTUNE0_MASK >> TXPREEMPAMPTUNE0_BIT)) {
+ reg &= ~TXPREEMPAMPTUNE0_MASK;
+ reg |= (data->emp_curr_control << TXPREEMPAMPTUNE0_BIT);
+ }
+
+ if (data->dc_vol_level_adjust && data->dc_vol_level_adjust <=
+ (TXVREFTUNE0_MASK >> TXVREFTUNE0_BIT)) {
+ reg &= ~TXVREFTUNE0_MASK;
+ reg |= (data->dc_vol_level_adjust << TXVREFTUNE0_BIT);
+ }
+
+ writel(reg, usbmisc->base + MX7D_USB_OTG_PHY_CFG1);
}
spin_unlock_irqrestore(&usbmisc->lock, flags);
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning
2020-07-09 10:58 [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Peter Chen
2020-07-09 10:59 ` [PATCH 2/4] usb: chipidea: imx: add two picophy parameters tuning implementation Peter Chen
@ 2020-07-09 10:59 ` Peter Chen
2020-07-13 8:36 ` Shawn Guo
2020-07-09 10:59 ` [PATCH 4/4] ARM64: dts: fsl: imx8mn-evk: " Peter Chen
2020-07-13 8:31 ` [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Shawn Guo
3 siblings, 1 reply; 8+ messages in thread
From: Peter Chen @ 2020-07-09 10:59 UTC (permalink / raw)
To: shawnguo, robh+dt
Cc: devicetree, Peter Chen, linux-usb, linux-imx, kernel,
fabio.estevam, linux-arm-kernel, jun.li
With these two parameters tuning, it can pass USB eye diagram at evk board.
Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index 0f1d7f8aeac4..c432b628e1ed 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -324,6 +324,8 @@
srp-disable;
adp-disable;
usb-role-switch;
+ picophy,pre-emp-curr-control = <3>;
+ picophy,dc-vol-level-adjust = <7>;
status = "okay";
port {
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 4/4] ARM64: dts: fsl: imx8mn-evk: add two parameters for picophy tuning
2020-07-09 10:58 [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Peter Chen
2020-07-09 10:59 ` [PATCH 2/4] usb: chipidea: imx: add two picophy parameters tuning implementation Peter Chen
2020-07-09 10:59 ` [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning Peter Chen
@ 2020-07-09 10:59 ` Peter Chen
2020-07-13 8:31 ` [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Shawn Guo
3 siblings, 0 replies; 8+ messages in thread
From: Peter Chen @ 2020-07-09 10:59 UTC (permalink / raw)
To: shawnguo, robh+dt
Cc: devicetree, Peter Chen, linux-usb, linux-imx, kernel,
fabio.estevam, linux-arm-kernel, jun.li
With these two parameters tuning, it can pass USB eye diagram at evk board.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index 85fc0aa38c4f..a6e9035e6cd5 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -132,6 +132,8 @@
srp-disable;
adp-disable;
usb-role-switch;
+ picophy,pre-emp-curr-control = <3>;
+ picophy,dc-vol-level-adjust = <7>;
status = "okay";
port {
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy
2020-07-09 10:58 [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Peter Chen
` (2 preceding siblings ...)
2020-07-09 10:59 ` [PATCH 4/4] ARM64: dts: fsl: imx8mn-evk: " Peter Chen
@ 2020-07-13 8:31 ` Shawn Guo
2020-07-13 8:38 ` Peter Chen
3 siblings, 1 reply; 8+ messages in thread
From: Shawn Guo @ 2020-07-13 8:31 UTC (permalink / raw)
To: Peter Chen
Cc: devicetree, linux-usb, robh+dt, linux-imx, kernel, fabio.estevam,
linux-arm-kernel, jun.li
On Thu, Jul 09, 2020 at 06:58:59PM +0800, Peter Chen wrote:
> Add two parameters which are used to tune USB signal for imx picophy,
> picophy is used at imx7d, imx8mm, and imx8mn.
>
> Reviewed-by: Jun Li <jun.li@nxp.com>
> Signed-off-by: Peter Chen <peter.chen@nxp.com>
> ---
> Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> index 51376cbe5f3d..e9858dafb08f 100644
> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> @@ -100,6 +100,13 @@ i.mx specific properties
> It's recommended to specify the over current polarity.
> - power-active-high: power signal polarity is active high
> - external-vbus-divider: enables off-chip resistor divider for Vbus
> +- picophy,pre-emp-curr-control: HS Transmitter Pre-Emphasis Current
'picophy' should be documented in vendor-prefixes.yaml?
Shawn
> + Control. This signal controls the amount of current sourced to the
> + USB_OTG*_DP and USB_OTG*_DN pins after a J-to-K or K-to-J transition.
> + Details can refer to TXPREEMPAMPTUNE0 bits of USBNC_n_PHY_CFG1.
> +- picophy,dc-vol-level-adjust: HS DC Voltage Level Adjustment.
> + Adjust the high-speed transmitter DC level voltage, details can refer
> + to TXVREFTUNE0 bits of USBNC_n_PHY_CFG1.
>
> Example:
>
> --
> 2.17.1
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning
2020-07-09 10:59 ` [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning Peter Chen
@ 2020-07-13 8:36 ` Shawn Guo
2020-07-13 8:40 ` Peter Chen
0 siblings, 1 reply; 8+ messages in thread
From: Shawn Guo @ 2020-07-13 8:36 UTC (permalink / raw)
To: Peter Chen
Cc: devicetree, linux-usb, robh+dt, linux-imx, kernel, fabio.estevam,
linux-arm-kernel, jun.li
On Thu, Jul 09, 2020 at 06:59:01PM +0800, Peter Chen wrote:
> With these two parameters tuning, it can pass USB eye diagram at evk board.
>
> Reviewed-by: Jun Li <jun.li@nxp.com>
> Signed-off-by: Peter Chen <peter.chen@nxp.com>
It's not so consistent, but idiomatically we prefix arm i.MX
platform/dts patches like 'ARM: ...', but 'arm64: ...' for arm64 ones.
Also with 'imx8mm-evk' in prefix, it's good enough to know this is
fsl/imx patch, so I suggest prefix like:
'arm64: dts: imx8mm-evk: ...'
Shawn
> ---
> arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> index 0f1d7f8aeac4..c432b628e1ed 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> @@ -324,6 +324,8 @@
> srp-disable;
> adp-disable;
> usb-role-switch;
> + picophy,pre-emp-curr-control = <3>;
> + picophy,dc-vol-level-adjust = <7>;
> status = "okay";
>
> port {
> --
> 2.17.1
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy
2020-07-13 8:31 ` [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Shawn Guo
@ 2020-07-13 8:38 ` Peter Chen
0 siblings, 0 replies; 8+ messages in thread
From: Peter Chen @ 2020-07-13 8:38 UTC (permalink / raw)
To: Shawn Guo
Cc: devicetree, linux-usb, robh+dt, dl-linux-imx, kernel,
Fabio Estevam, linux-arm-kernel, Jun Li
> > ---
> > Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 7 +++++++
> > 1 file changed, 7 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> > b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> > index 51376cbe5f3d..e9858dafb08f 100644
> > --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> > +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> > @@ -100,6 +100,13 @@ i.mx specific properties
> > It's recommended to specify the over current polarity.
> > - power-active-high: power signal polarity is active high
> > - external-vbus-divider: enables off-chip resistor divider for Vbus
> > +- picophy,pre-emp-curr-control: HS Transmitter Pre-Emphasis Current
>
> 'picophy' should be documented in vendor-prefixes.yaml?
>
For chipidea binding doc, there is no vendor specific doc, only there are vendor
specific parts in general binding doc.
Peter
> Shawn
>
> > + Control. This signal controls the amount of current sourced to the
> > + USB_OTG*_DP and USB_OTG*_DN pins after a J-to-K or K-to-J transition.
> > + Details can refer to TXPREEMPAMPTUNE0 bits of USBNC_n_PHY_CFG1.
> > +- picophy,dc-vol-level-adjust: HS DC Voltage Level Adjustment.
> > + Adjust the high-speed transmitter DC level voltage, details can
> > +refer
> > + to TXVREFTUNE0 bits of USBNC_n_PHY_CFG1.
> >
> > Example:
> >
> > --
> > 2.17.1
> >
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning
2020-07-13 8:36 ` Shawn Guo
@ 2020-07-13 8:40 ` Peter Chen
0 siblings, 0 replies; 8+ messages in thread
From: Peter Chen @ 2020-07-13 8:40 UTC (permalink / raw)
To: Shawn Guo
Cc: devicetree, linux-usb, robh+dt, dl-linux-imx, kernel,
Fabio Estevam, linux-arm-kernel, Jun Li
> > Reviewed-by: Jun Li <jun.li@nxp.com>
> > Signed-off-by: Peter Chen <peter.chen@nxp.com>
>
> It's not so consistent, but idiomatically we prefix arm i.MX platform/dts patches like
> 'ARM: ...', but 'arm64: ...' for arm64 ones.
> Also with 'imx8mm-evk' in prefix, it's good enough to know this is fsl/imx patch, so I
> suggest prefix like:
>
> 'arm64: dts: imx8mm-evk: ...'
>
Thanks, will change.
Peter
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2020-07-13 8:41 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-09 10:58 [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Peter Chen
2020-07-09 10:59 ` [PATCH 2/4] usb: chipidea: imx: add two picophy parameters tuning implementation Peter Chen
2020-07-09 10:59 ` [PATCH 3/4] ARM64: dts: fsl: imx8mm-evk: add two parameters for picophy tuning Peter Chen
2020-07-13 8:36 ` Shawn Guo
2020-07-13 8:40 ` Peter Chen
2020-07-09 10:59 ` [PATCH 4/4] ARM64: dts: fsl: imx8mn-evk: " Peter Chen
2020-07-13 8:31 ` [PATCH 1/4] doc: dt-binding: ci-hdrc-usb2: add property for imx picophy Shawn Guo
2020-07-13 8:38 ` Peter Chen
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).