From: Gerlando Falauto <gerlando.falauto@keymile.com>
To: Matthew Garrett <matthew.garrett@nebula.com>, netdev@vger.kernel.org
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
kishon@ti.com, Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: [PATCH V3] net/dt: Add support for overriding phy configuration from device tree
Date: Thu, 10 Jul 2014 14:37:38 +0200 [thread overview]
Message-ID: <53BE8912.4090804@keymile.com> (raw)
In-Reply-To: <1389999459-9483-1-git-send-email-matthew.garrett@nebula.com>
Hi Matthew,
On 01/17/2014 11:57 PM, Matthew Garrett wrote:
> Some hardware may be broken in interesting and board-specific ways, such
> that various bits of functionality don't work. This patch provides a
> mechanism for overriding mii registers during init based on the contents of
> the device tree data, allowing board-specific fixups without having to
> pollute generic code.
[six months later]
I assume nothing ever came out of this patch... is that right?
Thank you,
Gerlando
>
> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
> ---
>
> V3: Break the main function out into some helper functions and store the
> values in some structs.
>
> Documentation/devicetree/bindings/net/phy.txt | 21 +++++++
> drivers/net/phy/phy_device.c | 29 ++++++++-
> drivers/of/of_net.c | 87 +++++++++++++++++++++++++++
> include/linux/of_net.h | 12 ++++
> 4 files changed, 148 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/net/phy.txt b/Documentation/devicetree/bindings/net/phy.txt
> index 7cd18fb..fc50f02 100644
> --- a/Documentation/devicetree/bindings/net/phy.txt
> +++ b/Documentation/devicetree/bindings/net/phy.txt
> @@ -23,6 +23,21 @@ Optional Properties:
> assume clause 22. The compatible list may also contain other
> elements.
>
> +The following properties may be added to either the phy node or the parent
> +ethernet device. If not present, the hardware defaults will be used.
> +
> +- phy-mii-advertise-10half: 1 to advertise half-duplex 10MBit, 0 to disable
> +- phy-mii-advertise-10full: 1 to advertise full-duplex 10MBit, 0 to disable
> +- phy-mii-advertise-100half: 1 to advertise half-duplex 100MBit, 0 to disable
> +- phy-mii-advertise-100full: 1 to advertise full-duplex 100MBit, 0 to disable
> +- phy-mii-advertise-100base4: 1 to advertise 100base4, 0 to disable
> +- phy-mii-advertise-1000half: 1 to advertise half-duplex 1000MBit, 0 to disable
> +- phy-mii-advertise-1000full: 1 to advertise full-duplex 1000MBit, 0 to disable
> +- phy-mii-manual-master: 1 to enable manual master/slave configuration, 0
> + to disable manual master/slave configuration
> +- phy-mii-as-master: 1 to configure phy to act as master, 0 to configure phy
> + to act as slave. Ignored if manual master/slave configuration is not enabled.
> +
> Example:
>
> ethernet-phy@0 {
> @@ -32,4 +47,10 @@ ethernet-phy@0 {
> interrupts = <35 1>;
> reg = <0>;
> device_type = "ethernet-phy";
> + // Disable advertising of full duplex 1000MBit
> + phy-mii-advertise-1000full = <0>;
> + // Force manual phy master/slave configuration
> + phy-mii-manual-master = <1>;
> + // Forcibly configure phy as slave
> + phy-mii-as-master = <0>;
> };
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index d6447b3..91793bc 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -33,6 +33,7 @@
> #include <linux/mii.h>
> #include <linux/ethtool.h>
> #include <linux/phy.h>
> +#include <linux/of_net.h>
>
> #include <asm/io.h>
> #include <asm/irq.h>
> @@ -497,6 +498,28 @@ void phy_disconnect(struct phy_device *phydev)
> }
> EXPORT_SYMBOL(phy_disconnect);
>
> +int phy_override_from_of(struct phy_device *phydev)
> +{
> + int reg, regval;
> + u16 val, mask;
> +
> + /* Check for phy register overrides from OF */
> + for (reg = 0; reg < 16; reg++) {
> + if (!of_get_mii_register(phydev, reg, &val, &mask)) {
> + if (!mask)
> + continue;
> + regval = phy_read(phydev, reg);
> + if (regval < 0)
> + continue;
> + regval &= ~mask;
> + regval |= val;
> + phy_write(phydev, reg, regval);
> + }
> + }
> +
> + return 0;
> +}
> +
> int phy_init_hw(struct phy_device *phydev)
> {
> int ret;
> @@ -508,7 +531,11 @@ int phy_init_hw(struct phy_device *phydev)
> if (ret < 0)
> return ret;
>
> - return phydev->drv->config_init(phydev);
> + ret = phydev->drv->config_init(phydev);
> + if (ret < 0)
> + return ret;
> +
> + return phy_override_from_of(phydev);
> }
>
> /**
> diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
> index 8f9be2e..75751b7 100644
> --- a/drivers/of/of_net.c
> +++ b/drivers/of/of_net.c
> @@ -93,3 +93,90 @@ const void *of_get_mac_address(struct device_node *np)
> return NULL;
> }
> EXPORT_SYMBOL(of_get_mac_address);
> +
> +struct mii_override {
> + char *prop;
> + u32 supported;
> + u16 value;
> +};
> +
> +static struct mii_override mii_advertise_override[] = {
> + { "phy-mii-advertise-10half", SUPPORTED_10baseT_Half,
> + ADVERTISE_10HALF },
> + { "phy-mii-advertise-10full", SUPPORTED_10baseT_Full,
> + ADVERTISE_10FULL },
> + { "phy-mii-advertise-100half", SUPPORTED_100baseT_Half,
> + ADVERTISE_100HALF },
> + { "phy-mii-advertise-100full", SUPPORTED_100baseT_Full,
> + ADVERTISE_100FULL },
> + { "phy-mii-advertise-100base4", 0, ADVERTISE_100BASE4 },
> + { NULL },
> +};
> +
> +static struct mii_override mii_gigabit_override[] = {
> + { "phy-mii-advertise-1000half", SUPPORTED_1000baseT_Half,
> + ADVERTISE_1000HALF },
> + { "phy-mii-advertise-1000full", SUPPORTED_1000baseT_Full,
> + ADVERTISE_1000FULL },
> + { "phy-mii-as-master", 0, CTL1000_AS_MASTER },
> + { "phy-mii-manual-master", 0, CTL1000_ENABLE_MASTER },
> + { NULL },
> +};
> +
> +static void mii_handle_override(struct mii_override *override_list,
> + struct phy_device *phydev, u16 *val, u16 *mask)
> +{
> + struct device *dev = &phydev->dev;
> + struct device_node *np = dev->of_node;
> + struct mii_override *override;
> + u32 tmp;
> +
> + if (!np && dev->parent->of_node)
> + np = dev->parent->of_node;
> +
> + if (!np)
> + return;
> +
> + for (override = &override_list[0]; override->prop != NULL; override++) {
> + if (!of_property_read_u32(np, override->prop, &tmp)) {
> + if (tmp) {
> + *val |= override->value;
> + phydev->advertising |= override->supported;
> + } else {
> + phydev->advertising &= ~(override->supported);
> + }
> +
> + *mask |= override->value;
> + }
> + }
> +
> + return;
> +}
> +
> +/**
> + * Provide phy register overrides from the device tree. Some hardware may
> + * be broken in interesting and board-specific ways, so we want a mechanism
> + * for the board data to provide overrides for default values. This should be
> + * called during phy init.
> + */
> +int of_get_mii_register(struct phy_device *phydev, int reg, u16 *val,
> + u16 *mask)
> +{
> + *val = 0;
> + *mask = 0;
> +
> + switch (reg) {
> + case MII_ADVERTISE:
> + mii_handle_override(mii_advertise_override, phydev, val, mask);
> + break;
> +
> + case MII_CTRL1000:
> + mii_handle_override(mii_gigabit_override, phydev, val, mask);
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> + return 0;
> +}
> +EXPORT_SYMBOL(of_get_mii_register);
> diff --git a/include/linux/of_net.h b/include/linux/of_net.h
> index 34597c8..2e478bc 100644
> --- a/include/linux/of_net.h
> +++ b/include/linux/of_net.h
> @@ -7,10 +7,14 @@
> #ifndef __LINUX_OF_NET_H
> #define __LINUX_OF_NET_H
>
> +#include <linux/phy.h>
> +
> #ifdef CONFIG_OF_NET
> #include <linux/of.h>
> extern int of_get_phy_mode(struct device_node *np);
> extern const void *of_get_mac_address(struct device_node *np);
> +extern int of_get_mii_register(struct phy_device *np, int reg, u16 *val,
> + u16 *mask);
> #else
> static inline int of_get_phy_mode(struct device_node *np)
> {
> @@ -21,6 +25,14 @@ static inline const void *of_get_mac_address(struct device_node *np)
> {
> return NULL;
> }
> +static inline int of_get_mii_register(struct phy_device *np, int reg, u16 *val,
> + u16 *mask)
> +{
> + *val = 0;
> + *mask = 0;
> +
> + return -EINVAL;
> +}
> #endif
>
> #endif /* __LINUX_OF_NET_H */
>
next prev parent reply other threads:[~2014-07-10 12:45 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 21:38 [PATCH] net/dt: Add support for overriding phy configuration from device tree Matthew Garrett
2014-01-16 13:59 ` Gerhard Sittig
2014-01-16 14:40 ` Matthew Garrett
[not found] ` <20140116135905.GV20094-kDjWylLy9wD0K7fsECOQyeGNnDKD8DIp@public.gmane.org>
2014-01-16 14:47 ` [PATCH V2] " Matthew Garrett
[not found] ` <1389883631-1480-1-git-send-email-matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org>
2014-01-16 15:16 ` Arnd Bergmann
[not found] ` < 1389999459-9483-1-git-send-email-matthew.garrett@nebula.com>
2014-01-17 22:57 ` [PATCH V3] " Matthew Garrett
2014-01-19 15:34 ` Ben Hutchings
[not found] ` <1390145654.16433.102.camel-nDn/Rdv9kqW9Jme8/bJn5UCKIB8iOfG2tUK59QYPAWc@public.gmane.org>
2014-02-04 19:01 ` Florian Fainelli
2014-02-04 17:15 ` Grant Likely
2014-02-04 20:39 ` Florian Fainelli
2014-02-04 21:40 ` Ben Hutchings
2014-02-04 22:48 ` Florian Fainelli
2014-02-05 9:47 ` Grant Likely
2014-02-05 9:51 ` David Laight
[not found] ` <063D6719AE5E284EB5DD2968C1650D6D0F6B8BCA-VkEWCZq2GCInGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2014-02-07 22:43 ` Florian Fainelli
2014-02-10 16:14 ` Gerlando Falauto
[not found] ` <52F8FB03.6040606-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-02-10 17:09 ` Florian Fainelli
2014-02-11 9:09 ` Gerlando Falauto
[not found] ` <52F9E8E6.1090006-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-02-11 17:43 ` Florian Fainelli
2014-02-12 8:57 ` Gerlando Falauto
2014-07-10 12:37 ` Gerlando Falauto [this message]
[not found] ` <53BE8912.4090804-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-07-22 23:40 ` Florian Fainelli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=53BE8912.4090804@keymile.com \
--to=gerlando.falauto@keymile.com \
--cc=devicetree@vger.kernel.org \
--cc=f.fainelli@gmail.com \
--cc=kishon@ti.com \
--cc=linux-kernel@vger.kernel.org \
--cc=matthew.garrett@nebula.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).