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usb: gadget: udc: renesas_usb3: add extcon support 

This patch adds extcon support to see VBUS/ID signal states.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Yoshihiro Shimoda 2017-03-30 11:16:05 +09:00 committed by Felipe Balbi
parent 77172a1f88
commit 3b68e7ca38
2 changed files with 42 additions and 2 deletions
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1
drivers/usb/gadget/udc/Kconfig
View File

@ -191,6 +191,7 @@ config USB_RENESAS_USBHS_UDC
config USB_RENESAS_USB3
tristate 'Renesas USB3.0 Peripheral controller'
depends on ARCH_RENESAS || COMPILE_TEST
depends on EXTCON
help
Renesas USB3.0 Peripheral controller is a USB peripheral controller
that supports super, high, and full speed USB 3.0 data transfers.

43
drivers/usb/gadget/udc/renesas_usb3.c
View File

@ -10,6 +10,7 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/extcon.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
@ -263,6 +264,8 @@ struct renesas_usb3 {
struct usb_gadget gadget;
struct usb_gadget_driver *driver;
struct extcon_dev *extcon;
struct work_struct extcon_work;
struct renesas_usb3_ep *usb3_ep;
int num_usb3_eps;
@ -275,6 +278,8 @@ struct renesas_usb3 {
u8 ep0_buf[USB3_EP0_BUF_SIZE];
bool softconnect;
bool workaround_for_vbus;
bool extcon_host; /* check id and set EXTCON_USB_HOST */
bool extcon_usb; /* check vbus and set EXTCON_USB */
};
#define gadget_to_renesas_usb3(_gadget) \
@ -338,6 +343,15 @@ static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
return -EBUSY;
}
static void renesas_usb3_extcon_work(struct work_struct *work)
{
struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
extcon_work);
extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
}
static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
{
usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
@ -533,10 +547,14 @@ static void usb3_check_vbus(struct renesas_usb3 *usb3)
if (usb3->workaround_for_vbus) {
usb3_connect(usb3);
} else {
if (usb3_read(usb3, USB3_USB_STA) & USB_STA_VBUS_STA)
usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
USB_STA_VBUS_STA);
if (usb3->extcon_usb)
usb3_connect(usb3);
else
usb3_disconnect(usb3);
schedule_work(&usb3->extcon_work);
}
}
@ -569,10 +587,14 @@ static bool usb3_is_a_device(struct renesas_usb3 *usb3)
static void usb3_check_id(struct renesas_usb3 *usb3)
{
if (usb3_is_a_device(usb3))
usb3->extcon_host = usb3_is_a_device(usb3);
if (usb3->extcon_host)
usb3_mode_config(usb3, true, true);
else
usb3_mode_config(usb3, false, false);
schedule_work(&usb3->extcon_work);
}
static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
@ -1953,6 +1975,12 @@ static const struct of_device_id usb3_of_match[] = {
};
MODULE_DEVICE_TABLE(of, usb3_of_match);
static const unsigned int renesas_usb3_cable[] = {
EXTCON_USB,
EXTCON_USB_HOST,
EXTCON_NONE,
};
static int renesas_usb3_probe(struct platform_device *pdev)
{
struct renesas_usb3 *usb3;
@ -1996,6 +2024,17 @@ static int renesas_usb3_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
if (IS_ERR(usb3->extcon))
return PTR_ERR(usb3->extcon);
ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register extcon\n");
return ret;
}
/* for ep0 handling */
usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
if (!usb3->ep0_req)