From: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Bin Liu <b-liu-l0cyMroinI0@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Kishon Vijay Abraham I <kishon-l0cyMroinI0@public.gmane.org>
Cc: Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: [PATCH v3 2/4] phy-sun4i-usb: Add support for peripheral-only mode
Date: Sun, 5 Jun 2016 16:59:34 +0200 [thread overview]
Message-ID: <1465138776-6003-2-git-send-email-hdegoede@redhat.com> (raw)
In-Reply-To: <1465138776-6003-1-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Use the new of_usb_get_dr_mode_by_phy() function to get the dr_mode
from the musb controller node instead of assuming that having an id_det
gpio means otg mode, and not having one means host mode.
Implement peripheral-only mode by adding a sun4i_usb_phy0_get_id_det
helper which looks at the dr_mode, always registering our extcon and
always monitoring vbus.
If dr_mode is not specified in the dts, do not register phy0 as we then
do not know how to treat it. This is actually a good thing as this means
we will not be registering phy0 on devices where the otg controller is
not enabled in the devicetree.
Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
Changes in v2:
-Adjust for of_usb_get_dr_mode_by_phy now taking an args0 parameter
Changes in v3:
-Only toggle the phy vbus-det bit on id-change on systems without vbus-det
when in otg mode
---
drivers/phy/phy-sun4i-usb.c | 68 ++++++++++++++++++++++++++++++---------------
1 file changed, 46 insertions(+), 22 deletions(-)
diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
index bae54f7..e3cbaae 100644
--- a/drivers/phy/phy-sun4i-usb.c
+++ b/drivers/phy/phy-sun4i-usb.c
@@ -40,6 +40,7 @@
#include <linux/power_supply.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
+#include <linux/usb/of.h>
#include <linux/workqueue.h>
#define REG_ISCR 0x00
@@ -109,6 +110,7 @@ struct sun4i_usb_phy_cfg {
struct sun4i_usb_phy_data {
void __iomem *base;
const struct sun4i_usb_phy_cfg *cfg;
+ enum usb_dr_mode dr_mode;
struct mutex mutex;
struct sun4i_usb_phy {
struct phy *phy;
@@ -119,6 +121,7 @@ struct sun4i_usb_phy_data {
bool regulator_on;
int index;
} phys[MAX_PHYS];
+ int first_phy;
/* phy0 / otg related variables */
struct extcon_dev *extcon;
bool phy0_init;
@@ -285,16 +288,10 @@ static int sun4i_usb_phy_init(struct phy *_phy)
sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
- if (data->id_det_gpio) {
- /* OTG mode, force ISCR and cable state updates */
- data->id_det = -1;
- data->vbus_det = -1;
- queue_delayed_work(system_wq, &data->detect, 0);
- } else {
- /* Host only mode */
- sun4i_usb_phy0_set_id_detect(_phy, 0);
- sun4i_usb_phy0_set_vbus_detect(_phy, 1);
- }
+ /* Force ISCR and cable state updates */
+ data->id_det = -1;
+ data->vbus_det = -1;
+ queue_delayed_work(system_wq, &data->detect, 0);
}
return 0;
@@ -319,6 +316,19 @@ static int sun4i_usb_phy_exit(struct phy *_phy)
return 0;
}
+static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
+{
+ switch (data->dr_mode) {
+ case USB_DR_MODE_OTG:
+ return gpiod_get_value_cansleep(data->id_det_gpio);
+ case USB_DR_MODE_HOST:
+ return 0;
+ case USB_DR_MODE_PERIPHERAL:
+ default:
+ return 1;
+ }
+}
+
static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
{
if (data->vbus_det_gpio)
@@ -414,7 +424,10 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
struct phy *phy0 = data->phys[0].phy;
int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
- id_det = gpiod_get_value_cansleep(data->id_det_gpio);
+ if (phy0 == NULL)
+ return;
+
+ id_det = sun4i_usb_phy0_get_id_det(data);
vbus_det = sun4i_usb_phy0_get_vbus_det(data);
mutex_lock(&phy0->mutex);
@@ -430,7 +443,8 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
* without vbus detection report vbus low for long enough for
* the musb-ip to end the current device session.
*/
- if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) {
+ if (data->dr_mode == USB_DR_MODE_OTG &&
+ !sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) {
sun4i_usb_phy0_set_vbus_detect(phy0, 0);
msleep(200);
sun4i_usb_phy0_set_vbus_detect(phy0, 1);
@@ -456,7 +470,8 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
* without vbus detection report vbus low for long enough to
* the musb-ip to end the current host session.
*/
- if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) {
+ if (data->dr_mode == USB_DR_MODE_OTG &&
+ !sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) {
mutex_lock(&phy0->mutex);
sun4i_usb_phy0_set_vbus_detect(phy0, 0);
msleep(1000);
@@ -501,7 +516,8 @@ static struct phy *sun4i_usb_phy_xlate(struct device *dev,
{
struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
- if (args->args[0] >= data->cfg->num_phys)
+ if (args->args[0] < data->first_phy ||
+ args->args[0] >= data->cfg->num_phys)
return ERR_PTR(-ENODEV);
return data->phys[args->args[0]].phy;
@@ -575,13 +591,17 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
}
- /* vbus_det without id_det makes no sense, and is not supported */
- if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) {
- dev_err(dev, "usb0_id_det missing or invalid\n");
- return -ENODEV;
- }
-
- if (data->id_det_gpio) {
+ data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
+ switch (data->dr_mode) {
+ case USB_DR_MODE_OTG:
+ /* otg without id_det makes no sense, and is not supported */
+ if (!data->id_det_gpio) {
+ dev_err(dev, "usb0_id_det missing or invalid\n");
+ return -ENODEV;
+ }
+ /* fall through */
+ case USB_DR_MODE_HOST:
+ case USB_DR_MODE_PERIPHERAL:
data->extcon = devm_extcon_dev_allocate(dev,
sun4i_usb_phy0_cable);
if (IS_ERR(data->extcon))
@@ -592,9 +612,13 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
dev_err(dev, "failed to register extcon: %d\n", ret);
return ret;
}
+ break;
+ default:
+ dev_info(dev, "dr_mode unknown, not registering usb phy0\n");
+ data->first_phy = 1;
}
- for (i = 0; i < data->cfg->num_phys; i++) {
+ for (i = data->first_phy; i < data->cfg->num_phys; i++) {
struct sun4i_usb_phy *phy = data->phys + i;
char name[16];
--
2.7.4
--
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next prev parent reply other threads:[~2016-06-05 14:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-05 14:59 [PATCH v3 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block Hans de Goede
[not found] ` <1465138776-6003-1-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-05 14:59 ` Hans de Goede [this message]
[not found] ` <1465138776-6003-2-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-17 13:12 ` [PATCH v3 2/4] phy-sun4i-usb: Add support for peripheral-only mode Kishon Vijay Abraham I
2016-06-05 14:59 ` [PATCH v3 3/4] phy-sun4i-usb: Add workaround for missing Vbus det interrupts on A31 Hans de Goede
[not found] ` <1465138776-6003-3-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-17 13:12 ` Kishon Vijay Abraham I
2016-06-05 14:59 ` [PATCH v3 4/4] musb: sunxi: Simplify dr_mode handling Hans de Goede
[not found] ` <1465138776-6003-4-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-08 10:23 ` Maxime Ripard
2016-06-08 10:30 ` Hans de Goede
[not found] ` <08af737c-f1f1-0966-0eca-24d4daa7423b-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-15 19:30 ` Maxime Ripard
2016-06-10 14:53 ` Bin Liu
2016-06-09 14:30 ` [PATCH v3 1/4] USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block Bin Liu
2016-06-09 14:51 ` Hans de Goede
[not found] ` <9a05c16a-e8a2-02b7-c093-1131e27bcdd4-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-06-09 19:49 ` Bin Liu
2016-06-10 9:27 ` Hans de Goede
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