diff options
| -rw-r--r-- | drivers/usb/mtu3/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/usb/mtu3/Makefile | 11 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3.h | 34 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_core.c | 14 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_dr.c | 379 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_dr.h | 27 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_gadget.c | 6 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_host.c | 6 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_plat.c | 86 |
9 files changed, 557 insertions, 21 deletions
diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig index 59e3f6fa0da0..25cd61947bee 100644 --- a/drivers/usb/mtu3/Kconfig +++ b/drivers/usb/mtu3/Kconfig @@ -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 diff --git a/drivers/usb/mtu3/Makefile b/drivers/usb/mtu3/Makefile index 41e45e99ee6b..60e0fff7a847 100644 --- a/drivers/usb/mtu3/Makefile +++ b/drivers/usb/mtu3/Makefile @@ -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 diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h index a7c0ce873c44..ba9df719f363 100644 --- a/drivers/usb/mtu3/mtu3.h +++ b/drivers/usb/mtu3/mtu3.h @@ -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; diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index 2eef9727312c..520e55a760c9 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -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; diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c new file mode 100644 index 000000000000..1a8987e7c5b0 --- /dev/null +++ b/drivers/usb/mtu3/mtu3_dr.c @@ -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); +} diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h index 07066f4093ab..9b228b5811b0 100644 --- a/drivers/usb/mtu3/mtu3_dr.h +++ b/drivers/usb/mtu3/mtu3_dr.h @@ -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_ */ diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c index 84f3fe169928..9dd2441b4fa1 100644 --- a/drivers/usb/mtu3/mtu3_gadget.c +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -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); diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c index 361d6d844ce5..cd4d01087855 100644 --- a/drivers/usb/mtu3/mtu3_host.c +++ b/drivers/usb/mtu3/mtu3_host.c @@ -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); } diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index facb76c2877b..783367805c99 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -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; } |