If a usb host with dr_mode of "otg" has a usb-connector using a GPIO ID
pin use this to determine host vs peripheral.
Signed-off-by: Tim Harvey <thar...@gateworks.com>
---
v3:
- use function from ofnode_graph.h
- use log_debug instead of debug and pr_debug
v2:
- do not display error if 'port' node not found
- change print to debug
---
drivers/usb/common/common.c | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 13e9a61072a9..3c2d9b352c57 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -8,6 +8,8 @@
#include <dm.h>
#include <asm/global_data.h>
+#include <asm/gpio.h>
+#include <dm/ofnode_graph.h>
#include <linux/printk.h>
#include <linux/usb/otg.h>
#include <linux/usb/ch9.h>
@@ -22,6 +24,28 @@ static const char *const usb_dr_modes[] = {
[USB_DR_MODE_OTG] = "otg",
};
+static enum usb_dr_mode get_connector_drmode(ofnode node)
+{
+ ofnode conn = ofnode_graph_get_remote_node(node, -1, -1);
+ enum usb_dr_mode dr_mode = USB_DR_MODE_OTG;
+ struct gpio_desc id;
+
+ if (ofnode_valid(conn) &&
+ ofnode_device_is_compatible(conn, "gpio-usb-b-connector") &&
+ !gpio_request_by_name_nodev(conn, "id-gpios", 0, &id, GPIOD_IS_IN))
{
+ if (dm_gpio_get_value(&id))
+ dr_mode = USB_DR_MODE_PERIPHERAL;
+ else
+ dr_mode = USB_DR_MODE_HOST;
+ gpio_free_list_nodev(&id, 1);
+ log_debug("%s got dr_mode from connector %s dr_mode=%s\n",
__func__,
+ ofnode_get_name(node),
+ dr_mode == USB_DR_MODE_HOST ? "host" : "peripheral");
+ }
+
+ return dr_mode;
+}
+
enum usb_dr_mode usb_get_dr_mode(ofnode node)
{
const char *dr_mode;
@@ -35,7 +59,7 @@ enum usb_dr_mode usb_get_dr_mode(ofnode node)
for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
if (!strcmp(dr_mode, usb_dr_modes[i]))
- return i;
+ return (i == USB_DR_MODE_OTG) ?
get_connector_drmode(node) : i;
return USB_DR_MODE_UNKNOWN;
}
--
2.25.1
