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Message-ID: <1595834101-13094-6-git-send-email-chunfeng.yun@mediatek.com>
Date: Mon, 27 Jul 2020 15:14:55 +0800
From: Chunfeng Yun <chunfeng.yun@...iatek.com>
To: Felipe Balbi <balbi@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Matthias Brugger <matthias.bgg@...il.com>,
Chunfeng Yun <chunfeng.yun@...iatek.com>,
<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
Eddie Hung <eddie.hung@...iatek.com>
Subject: [PATCH 06/11] usb: mtu3: add ->udc_set_speed()
Make use of the method to make sure connect on speeds
supported by the gadget driver.
Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
drivers/usb/mtu3/mtu3.h | 4 ++-
drivers/usb/mtu3/mtu3_core.c | 68 +++++++++++++++++++++++++-----------------
drivers/usb/mtu3/mtu3_gadget.c | 14 +++++++++
3 files changed, 58 insertions(+), 28 deletions(-)
diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index d49db92..9d68f25 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -348,7 +348,8 @@ struct mtu3 {
struct usb_gadget_driver *gadget_driver;
struct mtu3_request ep0_req;
u8 setup_buf[EP0_RESPONSE_BUF];
- u32 max_speed;
+ enum usb_device_speed max_speed;
+ enum usb_device_speed speed;
unsigned is_active:1;
unsigned may_wakeup:1;
@@ -433,6 +434,7 @@ int mtu3_config_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
void mtu3_start(struct mtu3 *mtu);
void mtu3_stop(struct mtu3 *mtu);
void mtu3_dev_on_off(struct mtu3 *mtu, int is_on);
+void mtu3_set_speed(struct mtu3 *mtu, enum usb_device_speed speed);
int mtu3_gadget_setup(struct mtu3 *mtu);
void mtu3_gadget_cleanup(struct mtu3 *mtu);
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 9694813..c875b22 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -203,7 +203,42 @@ static void mtu3_intr_enable(struct mtu3 *mtu)
mtu3_writel(mbase, U3D_DEV_LINK_INTR_ENABLE, SSUSB_DEV_SPEED_CHG_INTR);
}
-static void mtu3_set_speed(struct mtu3 *mtu);
+void mtu3_set_speed(struct mtu3 *mtu, enum usb_device_speed speed)
+{
+ void __iomem *mbase = mtu->mac_base;
+
+ if (speed > mtu->max_speed)
+ speed = mtu->max_speed;
+
+ switch (speed) {
+ case USB_SPEED_FULL:
+ /* disable U3 SS function */
+ mtu3_clrbits(mbase, U3D_USB3_CONFIG, USB3_EN);
+ /* disable HS function */
+ mtu3_clrbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
+ break;
+ case USB_SPEED_HIGH:
+ mtu3_clrbits(mbase, U3D_USB3_CONFIG, USB3_EN);
+ /* HS/FS detected by HW */
+ mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
+ break;
+ case USB_SPEED_SUPER:
+ mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0),
+ SSUSB_U3_PORT_SSP_SPEED);
+ break;
+ case USB_SPEED_SUPER_PLUS:
+ mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0),
+ SSUSB_U3_PORT_SSP_SPEED);
+ break;
+ default:
+ dev_err(mtu->dev, "invalid speed: %s\n",
+ usb_speed_string(speed));
+ return;
+ }
+
+ mtu->speed = speed;
+ dev_dbg(mtu->dev, "set speed: %s\n", usb_speed_string(speed));
+}
/* CSR registers will be reset to default value if port is disabled */
static void mtu3_csr_init(struct mtu3 *mtu)
@@ -225,8 +260,6 @@ static void mtu3_csr_init(struct mtu3 *mtu)
mtu3_setbits(mbase, U3D_U3U2_SWITCH_CTRL, SOFTCON_CLR_AUTO_EN);
}
- mtu3_set_speed(mtu);
-
/* delay about 0.1us from detecting reset to send chirp-K */
mtu3_clrbits(mbase, U3D_LINK_RESET_INFO, WTCHRP_MSK);
/* enable automatical HWRW from L1 */
@@ -280,13 +313,13 @@ void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set)
void mtu3_dev_on_off(struct mtu3 *mtu, int is_on)
{
- if (mtu->is_u3_ip && mtu->max_speed >= USB_SPEED_SUPER)
+ if (mtu->is_u3_ip && mtu->speed >= USB_SPEED_SUPER)
mtu3_ss_func_set(mtu, is_on);
else
mtu3_hs_softconn_set(mtu, is_on);
dev_info(mtu->dev, "gadget (%s) pullup D%s\n",
- usb_speed_string(mtu->max_speed), is_on ? "+" : "-");
+ usb_speed_string(mtu->speed), is_on ? "+" : "-");
}
void mtu3_start(struct mtu3 *mtu)
@@ -299,6 +332,7 @@ void mtu3_start(struct mtu3 *mtu)
mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
mtu3_csr_init(mtu);
+ mtu3_set_speed(mtu, mtu->speed);
/* Initialize the default interrupts */
mtu3_intr_enable(mtu);
@@ -569,28 +603,6 @@ static void mtu3_mem_free(struct mtu3 *mtu)
kfree(mtu->ep_array);
}
-static void mtu3_set_speed(struct mtu3 *mtu)
-{
- void __iomem *mbase = mtu->mac_base;
-
- if (mtu->max_speed == USB_SPEED_FULL) {
- /* disable U3 SS function */
- mtu3_clrbits(mbase, U3D_USB3_CONFIG, USB3_EN);
- /* disable HS function */
- mtu3_clrbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
- } else if (mtu->max_speed == USB_SPEED_HIGH) {
- mtu3_clrbits(mbase, U3D_USB3_CONFIG, USB3_EN);
- /* HS/FS detected by HW */
- mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
- } else if (mtu->max_speed == USB_SPEED_SUPER) {
- mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0),
- SSUSB_U3_PORT_SSP_SPEED);
- }
-
- dev_info(mtu->dev, "max_speed: %s\n",
- usb_speed_string(mtu->max_speed));
-}
-
static void mtu3_regs_init(struct mtu3 *mtu)
{
void __iomem *mbase = mtu->mac_base;
@@ -780,6 +792,8 @@ static void mtu3_check_params(struct mtu3 *mtu)
if (!mtu->is_u3_ip && (mtu->max_speed > USB_SPEED_HIGH))
mtu->max_speed = USB_SPEED_HIGH;
+ mtu->speed = mtu->max_speed;
+
dev_info(mtu->dev, "max_speed: %s\n",
usb_speed_string(mtu->max_speed));
}
diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c
index 6b26cb8..3d13129 100644
--- a/drivers/usb/mtu3/mtu3_gadget.c
+++ b/drivers/usb/mtu3/mtu3_gadget.c
@@ -577,6 +577,19 @@ static int mtu3_gadget_stop(struct usb_gadget *g)
return 0;
}
+static void
+mtu3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed)
+{
+ struct mtu3 *mtu = gadget_to_mtu3(g);
+ unsigned long flags;
+
+ dev_dbg(mtu->dev, "%s %s\n", __func__, usb_speed_string(speed));
+
+ spin_lock_irqsave(&mtu->lock, flags);
+ mtu3_set_speed(mtu, speed);
+ spin_unlock_irqrestore(&mtu->lock, flags);
+}
+
static const struct usb_gadget_ops mtu3_gadget_ops = {
.get_frame = mtu3_gadget_get_frame,
.wakeup = mtu3_gadget_wakeup,
@@ -584,6 +597,7 @@ static int mtu3_gadget_stop(struct usb_gadget *g)
.pullup = mtu3_gadget_pullup,
.udc_start = mtu3_gadget_start,
.udc_stop = mtu3_gadget_stop,
+ .udc_set_speed = mtu3_gadget_set_speed,
};
static void mtu3_state_reset(struct mtu3 *mtu)
--
1.9.1
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