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usb: mtu3: dual-role mode support

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support dual-role mode; there are two ways to switch between
host and device modes, one is by idpin, another is by debugfs
which depends on user input.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2016-10-19 10:28:26 +08:00 committed by Greg Kroah-Hartman
parent b3f4e727c1
commit d0ed062a8b
9 changed files with 557 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/usb/mtu3/Kconfig
View File

@ -2,7 +2,7 @@
config USB_MTU3
tristate "MediaTek USB3 Dual Role controller"
depends on (USB || USB_GADGET) && HAS_DMA
depends on EXTCON && (USB || USB_GADGET) && HAS_DMA
depends on ARCH_MEDIATEK || COMPILE_TEST
select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD
help
@ -19,6 +19,7 @@ config USB_MTU3
if USB_MTU3
choice
bool "MTU3 Mode Selection"
default USB_MTU3_DUAL_ROLE if (USB && USB_GADGET)
default USB_MTU3_HOST if (USB && !USB_GADGET)
default USB_MTU3_GADGET if (!USB && USB_GADGET)
@ -36,6 +37,18 @@ config USB_MTU3_GADGET
Select this when you want to use MTU3 in gadget mode only,
thereby the host feature will be regressed.
config USB_MTU3_DUAL_ROLE
bool "Dual Role mode"
depends on ((USB=y || USB=USB_MTU3) && (USB_GADGET=y || USB_GADGET=USB_MTU3))
help
This is the default mode of working of MTU3 controller where
both host and gadget features are enabled.
endchoice
config USB_MTU3_DEBUG
bool "Enable Debugging Messages"
help
Say Y here to enable debugging messages in the MTU3 Driver.
endif

11
drivers/usb/mtu3/Makefile
View File

@ -1,11 +1,18 @@
ccflags-$(CONFIG_USB_MTU3_DEBUG) += -DDEBUG
obj-$(CONFIG_USB_MTU3) += mtu3.o
mtu3-y := mtu3_plat.o
ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST)),)
ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
mtu3-y += mtu3_host.o
endif
ifneq ($(filter y,$(CONFIG_USB_MTU3_GADGET)),)
ifneq ($(filter y,$(CONFIG_USB_MTU3_GADGET) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
mtu3-y += mtu3_core.o mtu3_gadget_ep0.o mtu3_gadget.o mtu3_qmu.o
endif
ifneq ($(CONFIG_USB_MTU3_DUAL_ROLE),)
mtu3-y += mtu3_dr.o
endif

34
drivers/usb/mtu3/mtu3.h
View File

@ -21,6 +21,7 @@
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/extcon.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/phy/phy.h>
@ -172,15 +173,44 @@ struct mtu3_gpd_ring {
struct qmu_gpd *enqueue;
struct qmu_gpd *dequeue;
};
/**
* @vbus: vbus 5V used by host mode
* @edev: external connector used to detect vbus and iddig changes
* @vbus_nb: notifier for vbus detection
* @vbus_nb: notifier for iddig(idpin) detection
* @extcon_reg_dwork: delay work for extcon notifier register, waiting for
* xHCI driver initialization, it's necessary for system bootup
* as device.
* @is_u3_drd: whether port0 supports usb3.0 dual-role device or not
* @id_*: used to maually switch between host and device modes by idpin
* @manual_drd_enabled: it's true when supports dual-role device by debugfs
* to switch host/device modes depending on user input.
*/
struct otg_switch_mtk {
struct regulator *vbus;
struct extcon_dev *edev;
struct notifier_block vbus_nb;
struct notifier_block id_nb;
struct delayed_work extcon_reg_dwork;
bool is_u3_drd;
/* dual-role switch by debugfs */
struct pinctrl *id_pinctrl;
struct pinctrl_state *id_float;
struct pinctrl_state *id_ground;
bool manual_drd_enabled;
};
/**
* @mac_base: register base address of device MAC, exclude xHCI's
* @ippc_base: register base address of ip port controller interface (IPPC)
* @ippc_base: register base address of IP Power and Clock interface (IPPC)
* @vusb33: usb3.3V shared by device/host IP
* @sys_clk: system clock of mtu3, shared by device/host IP
* @dr_mode: works in which mode:
* host only, device only or dual-role mode
* @u2_ports: number of usb2.0 host ports
* @u3_ports: number of usb3.0 host ports
* @dbgfs_root: only used when supports manual dual-role switch via debugfs
* @wakeup_en: it's true when supports remote wakeup in host mode
* @wk_deb_p0: port0's wakeup debounce clock
* @wk_deb_p1: it's optional, and depends on port1 is supported or not
@ -196,10 +226,12 @@ struct ssusb_mtk {
struct regulator *vusb33;
struct clk *sys_clk;
/* otg */
struct otg_switch_mtk otg_switch;
enum usb_dr_mode dr_mode;
bool is_host;
int u2_ports;
int u3_ports;
struct dentry *dbgfs_root;
/* usb wakeup for host mode */
bool wakeup_en;
struct clk *wk_deb_p0;

14
drivers/usb/mtu3/mtu3_core.c
View File

@ -150,7 +150,6 @@ static void mtu3_intr_disable(struct mtu3 *mtu)
/* Disable level 1 interrupts */
mtu3_writel(mbase, U3D_LV1IECR, ~0x0);
/* Disable endpoint interrupts */
mtu3_writel(mbase, U3D_EPIECR, ~0x0);
}
@ -161,13 +160,10 @@ static void mtu3_intr_status_clear(struct mtu3 *mtu)
/* Clear EP0 and Tx/Rx EPn interrupts status */
mtu3_writel(mbase, U3D_EPISR, ~0x0);
/* Clear U2 USB common interrupts status */
mtu3_writel(mbase, U3D_COMMON_USB_INTR, ~0x0);
/* Clear U3 LTSSM interrupts status */
mtu3_writel(mbase, U3D_LTSSM_INTR, ~0x0);
/* Clear speed change interrupt status */
mtu3_writel(mbase, U3D_DEV_LINK_INTR, ~0x0);
}
@ -268,7 +264,6 @@ void mtu3_start(struct mtu3 *mtu)
/* Initialize the default interrupts */
mtu3_intr_enable(mtu);
mtu->is_active = 1;
if (mtu->softconnect)
@ -516,7 +511,6 @@ static int mtu3_mem_alloc(struct mtu3 *mtu)
mtu->out_eps = &ep_array[mtu->num_eps];
/* ep0 uses in_eps[0], out_eps[0] is reserved */
mtu->ep0 = mtu->in_eps;
mtu->ep0->mtu = mtu;
mtu->ep0->epnum = 0;
@ -560,6 +554,7 @@ static void mtu3_set_speed(struct mtu3 *mtu)
/* HS/FS detected by HW */
mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
}
dev_info(mtu->dev, "max_speed: %s\n",
usb_speed_string(mtu->max_speed));
}
@ -586,13 +581,10 @@ static void mtu3_regs_init(struct mtu3 *mtu)
/* delay about 0.1us from detecting reset to send chirp-K */
mtu3_clrbits(mbase, U3D_LINK_RESET_INFO, WTCHRP_MSK);
/* U2/U3 detected by HW */
mtu3_writel(mbase, U3D_DEVICE_CONF, 0);
/* enable QMU 16B checksum */
mtu3_setbits(mbase, U3D_QCR0, QMU_CS16B_EN);
/* vbus detected by HW */
mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON);
}
@ -838,6 +830,10 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
goto gadget_err;
}
/* init as host mode, power down device IP for power saving */
if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG)
mtu3_stop(mtu);
dev_dbg(dev, " %s() done...\n", __func__);
return 0;

379
drivers/usb/mtu3/mtu3_dr.c Normal file
View File

@ -0,0 +1,379 @@
/*
* mtu3_dr.c - dual role switch and host glue layer
*
* Copyright (C) 2016 MediaTek Inc.
*
* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/debugfs.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/of_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include "mtu3.h"
#include "mtu3_dr.h"
#define USB2_PORT 2
#define USB3_PORT 3
enum mtu3_vbus_id_state {
MTU3_ID_FLOAT = 1,
MTU3_ID_GROUND,
MTU3_VBUS_OFF,
MTU3_VBUS_VALID,
};
static void toggle_opstate(struct ssusb_mtk *ssusb)
{
if (!ssusb->otg_switch.is_u3_drd) {
mtu3_setbits(ssusb->mac_base, U3D_DEVICE_CONTROL, DC_SESSION);
mtu3_setbits(ssusb->mac_base, U3D_POWER_MANAGEMENT, SOFT_CONN);
}
}
/* only port0 supports dual-role mode */
static int ssusb_port0_switch(struct ssusb_mtk *ssusb,
int version, bool tohost)
{
void __iomem *ibase = ssusb->ippc_base;
u32 value;
dev_dbg(ssusb->dev, "%s (switch u%d port0 to %s)\n", __func__,
version, tohost ? "host" : "device");
if (version == USB2_PORT) {
/* 1. power off and disable u2 port0 */
value = mtu3_readl(ibase, SSUSB_U2_CTRL(0));
value |= SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS;
mtu3_writel(ibase, SSUSB_U2_CTRL(0), value);
/* 2. power on, enable u2 port0 and select its mode */
value = mtu3_readl(ibase, SSUSB_U2_CTRL(0));
value &= ~(SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS);
value = tohost ? (value | SSUSB_U2_PORT_HOST_SEL) :
(value & (~SSUSB_U2_PORT_HOST_SEL));
mtu3_writel(ibase, SSUSB_U2_CTRL(0), value);
} else {
/* 1. power off and disable u3 port0 */
value = mtu3_readl(ibase, SSUSB_U3_CTRL(0));
value |= SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS;
mtu3_writel(ibase, SSUSB_U3_CTRL(0), value);
/* 2. power on, enable u3 port0 and select its mode */
value = mtu3_readl(ibase, SSUSB_U3_CTRL(0));
value &= ~(SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS);
value = tohost ? (value | SSUSB_U3_PORT_HOST_SEL) :
(value & (~SSUSB_U3_PORT_HOST_SEL));
mtu3_writel(ibase, SSUSB_U3_CTRL(0), value);
}
return 0;
}
static void switch_port_to_host(struct ssusb_mtk *ssusb)
{
u32 check_clk = 0;
dev_dbg(ssusb->dev, "%s\n", __func__);
ssusb_port0_switch(ssusb, USB2_PORT, true);
if (ssusb->otg_switch.is_u3_drd) {
ssusb_port0_switch(ssusb, USB3_PORT, true);
check_clk = SSUSB_U3_MAC_RST_B_STS;
}
ssusb_check_clocks(ssusb, check_clk);
/* after all clocks are stable */
toggle_opstate(ssusb);
}
static void switch_port_to_device(struct ssusb_mtk *ssusb)
{
u32 check_clk = 0;
dev_dbg(ssusb->dev, "%s\n", __func__);
ssusb_port0_switch(ssusb, USB2_PORT, false);
if (ssusb->otg_switch.is_u3_drd) {
ssusb_port0_switch(ssusb, USB3_PORT, false);
check_clk = SSUSB_U3_MAC_RST_B_STS;
}
ssusb_check_clocks(ssusb, check_clk);
}
int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on)
{
struct ssusb_mtk *ssusb =
container_of(otg_sx, struct ssusb_mtk, otg_switch);
struct regulator *vbus = otg_sx->vbus;
int ret;
/* vbus is optional */
if (!vbus)
return 0;
dev_dbg(ssusb->dev, "%s: turn %s\n", __func__, is_on ? "on" : "off");
if (is_on) {
ret = regulator_enable(vbus);
if (ret) {
dev_err(ssusb->dev, "vbus regulator enable failed\n");
return ret;
}
} else {
regulator_disable(vbus);
}
return 0;
}
/*
* switch to host: -> MTU3_VBUS_OFF --> MTU3_ID_GROUND
* switch to device: -> MTU3_ID_FLOAT --> MTU3_VBUS_VALID
*/
static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
enum mtu3_vbus_id_state status)
{
struct ssusb_mtk *ssusb =
container_of(otg_sx, struct ssusb_mtk, otg_switch);
struct mtu3 *mtu = ssusb->u3d;
dev_dbg(ssusb->dev, "mailbox state(%d)\n", status);
switch (status) {
case MTU3_ID_GROUND:
switch_port_to_host(ssusb);
ssusb_set_vbus(otg_sx, 1);
ssusb->is_host = true;
break;
case MTU3_ID_FLOAT:
ssusb->is_host = false;
ssusb_set_vbus(otg_sx, 0);
switch_port_to_device(ssusb);
break;
case MTU3_VBUS_OFF:
mtu3_stop(mtu);
pm_relax(ssusb->dev);
break;
case MTU3_VBUS_VALID:
/* avoid suspend when works as device */
pm_stay_awake(ssusb->dev);
mtu3_start(mtu);
break;
default:
dev_err(ssusb->dev, "invalid state\n");
}
}
static int ssusb_id_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct otg_switch_mtk *otg_sx =
container_of(nb, struct otg_switch_mtk, id_nb);
if (event)
ssusb_set_mailbox(otg_sx, MTU3_ID_GROUND);
else
ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT);
return NOTIFY_DONE;
}
static int ssusb_vbus_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct otg_switch_mtk *otg_sx =
container_of(nb, struct otg_switch_mtk, vbus_nb);
if (event)
ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID);
else
ssusb_set_mailbox(otg_sx, MTU3_VBUS_OFF);
return NOTIFY_DONE;
}
static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx)
{
struct ssusb_mtk *ssusb =
container_of(otg_sx, struct ssusb_mtk, otg_switch);
struct extcon_dev *edev = otg_sx->edev;
int ret;
/* extcon is optional */
if (!edev)
return 0;
otg_sx->vbus_nb.notifier_call = ssusb_vbus_notifier;
ret = extcon_register_notifier(edev, EXTCON_USB,
&otg_sx->vbus_nb);
if (ret < 0)
dev_err(ssusb->dev, "failed to register notifier for USB\n");
otg_sx->id_nb.notifier_call = ssusb_id_notifier;
ret = extcon_register_notifier(edev, EXTCON_USB_HOST,
&otg_sx->id_nb);
if (ret < 0)
dev_err(ssusb->dev, "failed to register notifier for USB-HOST\n");
dev_dbg(ssusb->dev, "EXTCON_USB: %d, EXTCON_USB_HOST: %d\n",
extcon_get_cable_state_(edev, EXTCON_USB),
extcon_get_cable_state_(edev, EXTCON_USB_HOST));
/* default as host, switch to device mode if needed */
if (extcon_get_cable_state_(edev, EXTCON_USB_HOST) == false)
ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT);
if (extcon_get_cable_state_(edev, EXTCON_USB) == true)
ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID);
return 0;
}
static void extcon_register_dwork(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct otg_switch_mtk *otg_sx =
container_of(dwork, struct otg_switch_mtk, extcon_reg_dwork);
ssusb_extcon_register(otg_sx);
}
/*
* We provide an interface via debugfs to switch between host and device modes
* depending on user input.
* This is useful in special cases, such as uses TYPE-A receptacle but also
* wants to support dual-role mode.
* It generates cable state changes by pulling up/down IDPIN and
* notifies driver to switch mode by "extcon-usb-gpio".
* NOTE: when use MICRO receptacle, should not enable this interface.
*/
static void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host)
{
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
if (to_host)
pinctrl_select_state(otg_sx->id_pinctrl, otg_sx->id_ground);
else
pinctrl_select_state(otg_sx->id_pinctrl, otg_sx->id_float);
}
static int ssusb_mode_show(struct seq_file *sf, void *unused)
{
struct ssusb_mtk *ssusb = sf->private;
seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n",
ssusb->is_host ? "host" : "device",
ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto");
return 0;
}
static int ssusb_mode_open(struct inode *inode, struct file *file)
{
return single_open(file, ssusb_mode_show, inode->i_private);
}
static ssize_t ssusb_mode_write(struct file *file,
const char __user *ubuf, size_t count, loff_t *ppos)
{
struct seq_file *sf = file->private_data;
struct ssusb_mtk *ssusb = sf->private;
char buf[16];
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
ssusb_mode_manual_switch(ssusb, 1);
} else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
ssusb_mode_manual_switch(ssusb, 0);
} else {
dev_err(ssusb->dev, "wrong or duplicated setting\n");
return -EINVAL;
}
return count;
}
static const struct file_operations ssusb_mode_fops = {
.open = ssusb_mode_open,
.write = ssusb_mode_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void ssusb_debugfs_init(struct ssusb_mtk *ssusb)
{
struct dentry *root;
struct dentry *file;
root = debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root);
if (IS_ERR_OR_NULL(root)) {
if (!root)
dev_err(ssusb->dev, "create debugfs root failed\n");
return;
}
ssusb->dbgfs_root = root;
file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
ssusb, &ssusb_mode_fops);
if (!file)
dev_dbg(ssusb->dev, "create debugfs mode failed\n");
}
static void ssusb_debugfs_exit(struct ssusb_mtk *ssusb)
{
debugfs_remove_recursive(ssusb->dbgfs_root);
}
int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
{
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
INIT_DELAYED_WORK(&otg_sx->extcon_reg_dwork, extcon_register_dwork);
if (otg_sx->manual_drd_enabled)
ssusb_debugfs_init(ssusb);
/* It is enough to delay 1s for waiting for host initialization */
schedule_delayed_work(&otg_sx->extcon_reg_dwork, HZ);
return 0;
}
void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
{
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
cancel_delayed_work(&otg_sx->extcon_reg_dwork);
if (otg_sx->edev) {
extcon_unregister_notifier(otg_sx->edev,
EXTCON_USB, &otg_sx->vbus_nb);
extcon_unregister_notifier(otg_sx->edev,
EXTCON_USB_HOST, &otg_sx->id_nb);
}
if (otg_sx->manual_drd_enabled)
ssusb_debugfs_exit(ssusb);
}

27
drivers/usb/mtu3/mtu3_dr.h
View File

@ -19,7 +19,7 @@
#ifndef _MTU3_DR_H_
#define _MTU3_DR_H_
#if IS_ENABLED(CONFIG_USB_MTU3_HOST)
#if IS_ENABLED(CONFIG_USB_MTU3_HOST) || IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
int ssusb_host_init(struct ssusb_mtk *ssusb, struct device_node *parent_dn);
void ssusb_host_exit(struct ssusb_mtk *ssusb);
@ -69,7 +69,7 @@ static inline void ssusb_wakeup_disable(struct ssusb_mtk *ssusb)
#endif
#if IS_ENABLED(CONFIG_USB_MTU3_GADGET)
#if IS_ENABLED(CONFIG_USB_MTU3_GADGET) || IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
int ssusb_gadget_init(struct ssusb_mtk *ssusb);
void ssusb_gadget_exit(struct ssusb_mtk *ssusb);
#else
@ -82,4 +82,27 @@ static inline void ssusb_gadget_exit(struct ssusb_mtk *ssusb)
{}
#endif
#if IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
int ssusb_otg_switch_init(struct ssusb_mtk *ssusb);
void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb);
int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on);
#else
static inline int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
{
return 0;
}
static inline void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
{}
static inline int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on)
{
return 0;
}
#endif
#endif /* _MTU3_DR_H_ */

6
drivers/usb/mtu3/mtu3_gadget.c
View File

@ -522,7 +522,8 @@ static int mtu3_gadget_start(struct usb_gadget *gadget,
mtu->softconnect = 0;
mtu->gadget_driver = driver;
mtu3_start(mtu);
if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
mtu3_start(mtu);
spin_unlock_irqrestore(&mtu->lock, flags);
@ -575,7 +576,8 @@ static int mtu3_gadget_stop(struct usb_gadget *g)
stop_activity(mtu);
mtu->gadget_driver = NULL;
mtu3_stop(mtu);
if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL)
mtu3_stop(mtu);
spin_unlock_irqrestore(&mtu->lock, flags);

6
drivers/usb/mtu3/mtu3_host.c
View File

@ -230,10 +230,16 @@ static void ssusb_host_setup(struct ssusb_mtk *ssusb)
* if support OTG, gadget driver will switch port0 to device mode
*/
ssusb_host_enable(ssusb);
/* if port0 supports dual-role, works as host mode by default */
ssusb_set_vbus(&ssusb->otg_switch, 1);
}
static void ssusb_host_cleanup(struct ssusb_mtk *ssusb)
{
if (ssusb->is_host)
ssusb_set_vbus(&ssusb->otg_switch, 0);
ssusb_host_disable(ssusb, false);
}

86
drivers/usb/mtu3/mtu3_plat.c
View File

@ -142,13 +142,10 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
phy_err:
ssusb_phy_exit(ssusb);
phy_init_err:
clk_disable_unprepare(ssusb->sys_clk);
clk_err:
regulator_disable(ssusb->vusb33);
vusb33_err:
return ret;
@ -170,10 +167,39 @@ static void ssusb_ip_sw_reset(struct ssusb_mtk *ssusb)
mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
}
static int get_iddig_pinctrl(struct ssusb_mtk *ssusb)
{
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
otg_sx->id_pinctrl = devm_pinctrl_get(ssusb->dev);
if (IS_ERR(otg_sx->id_pinctrl)) {
dev_err(ssusb->dev, "Cannot find id pinctrl!\n");
return PTR_ERR(otg_sx->id_pinctrl);
}
otg_sx->id_float =
pinctrl_lookup_state(otg_sx->id_pinctrl, "id_float");
if (IS_ERR(otg_sx->id_float)) {
dev_err(ssusb->dev, "Cannot find pinctrl id_float!\n");
return PTR_ERR(otg_sx->id_float);
}
otg_sx->id_ground =
pinctrl_lookup_state(otg_sx->id_pinctrl, "id_ground");
if (IS_ERR(otg_sx->id_ground)) {
dev_err(ssusb->dev, "Cannot find pinctrl id_ground!\n");
return PTR_ERR(otg_sx->id_ground);
}
return 0;
}
static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
{
struct device_node *node = pdev->dev.of_node;
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
struct device *dev = &pdev->dev;
struct regulator *vbus;
struct resource *res;
int i;
int ret;
@ -230,6 +256,37 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
if (ret)
return ret;
if (ssusb->dr_mode != USB_DR_MODE_OTG)
return 0;
/* if dual-role mode is supported */
vbus = devm_regulator_get(&pdev->dev, "vbus");
if (IS_ERR(vbus)) {
dev_err(dev, "failed to get vbus\n");
return PTR_ERR(vbus);
}
otg_sx->vbus = vbus;
otg_sx->is_u3_drd = of_property_read_bool(node, "mediatek,usb3-drd");
otg_sx->manual_drd_enabled =
of_property_read_bool(node, "enable-manual-drd");
if (of_property_read_bool(node, "extcon")) {
otg_sx->edev = extcon_get_edev_by_phandle(ssusb->dev, 0);
if (IS_ERR(otg_sx->edev)) {
dev_err(ssusb->dev, "couldn't get extcon device\n");
return -EPROBE_DEFER;
}
if (otg_sx->manual_drd_enabled) {
ret = get_iddig_pinctrl(ssusb);
if (ret)
return ret;
}
}
dev_info(dev, "dr_mode: %d, is_u3_dr: %d\n",
ssusb->dr_mode, otg_sx->is_u3_drd);
return 0;
}
@ -292,6 +349,21 @@ static int mtu3_probe(struct platform_device *pdev)
goto comm_exit;
}
break;
case USB_DR_MODE_OTG:
ret = ssusb_gadget_init(ssusb);
if (ret) {
dev_err(dev, "failed to initialize gadget\n");
goto comm_exit;
}
ret = ssusb_host_init(ssusb, node);
if (ret) {
dev_err(dev, "failed to initialize host\n");
goto gadget_exit;
}
ssusb_otg_switch_init(ssusb);
break;
default:
dev_err(dev, "unsupported mode: %d\n", ssusb->dr_mode);
ret = -EINVAL;
@ -300,9 +372,10 @@ static int mtu3_probe(struct platform_device *pdev)
return 0;
gadget_exit:
ssusb_gadget_exit(ssusb);
comm_exit:
ssusb_rscs_exit(ssusb);
comm_init_err:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
@ -321,6 +394,11 @@ static int mtu3_remove(struct platform_device *pdev)
case USB_DR_MODE_HOST:
ssusb_host_exit(ssusb);
break;
case USB_DR_MODE_OTG:
ssusb_otg_switch_exit(ssusb);
ssusb_gadget_exit(ssusb);
ssusb_host_exit(ssusb);
break;
default:
return -EINVAL;
}