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usb: mtu3: dual-role mode support
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
Greg Kroah-Hartman
parent
b3f4e727c1
commit
d0ed062a8b
@ -2,7 +2,7 @@
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config USB_MTU3
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tristate "MediaTek USB3 Dual Role controller"
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depends on (USB || USB_GADGET) && HAS_DMA
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depends on EXTCON && (USB || USB_GADGET) && HAS_DMA
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depends on ARCH_MEDIATEK || COMPILE_TEST
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select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD
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help
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@ -19,6 +19,7 @@ config USB_MTU3
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if USB_MTU3
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choice
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bool "MTU3 Mode Selection"
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default USB_MTU3_DUAL_ROLE if (USB && USB_GADGET)
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default USB_MTU3_HOST if (USB && !USB_GADGET)
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default USB_MTU3_GADGET if (!USB && USB_GADGET)
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@ -36,6 +37,18 @@ config USB_MTU3_GADGET
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Select this when you want to use MTU3 in gadget mode only,
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thereby the host feature will be regressed.
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config USB_MTU3_DUAL_ROLE
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bool "Dual Role mode"
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depends on ((USB=y || USB=USB_MTU3) && (USB_GADGET=y || USB_GADGET=USB_MTU3))
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help
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This is the default mode of working of MTU3 controller where
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both host and gadget features are enabled.
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endchoice
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config USB_MTU3_DEBUG
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bool "Enable Debugging Messages"
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help
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Say Y here to enable debugging messages in the MTU3 Driver.
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endif
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@ -1,11 +1,18 @@
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ccflags-$(CONFIG_USB_MTU3_DEBUG) += -DDEBUG
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obj-$(CONFIG_USB_MTU3) += mtu3.o
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mtu3-y := mtu3_plat.o
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ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST)),)
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ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
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mtu3-y += mtu3_host.o
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endif
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ifneq ($(filter y,$(CONFIG_USB_MTU3_GADGET)),)
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ifneq ($(filter y,$(CONFIG_USB_MTU3_GADGET) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
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mtu3-y += mtu3_core.o mtu3_gadget_ep0.o mtu3_gadget.o mtu3_qmu.o
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endif
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ifneq ($(CONFIG_USB_MTU3_DUAL_ROLE),)
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mtu3-y += mtu3_dr.o
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endif
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@ -21,6 +21,7 @@
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#include <linux/device.h>
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#include <linux/dmapool.h>
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#include <linux/extcon.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/phy/phy.h>
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@ -172,15 +173,44 @@ struct mtu3_gpd_ring {
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struct qmu_gpd *enqueue;
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struct qmu_gpd *dequeue;
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};
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/**
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* @vbus: vbus 5V used by host mode
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* @edev: external connector used to detect vbus and iddig changes
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* @vbus_nb: notifier for vbus detection
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* @vbus_nb: notifier for iddig(idpin) detection
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* @extcon_reg_dwork: delay work for extcon notifier register, waiting for
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* xHCI driver initialization, it's necessary for system bootup
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* as device.
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* @is_u3_drd: whether port0 supports usb3.0 dual-role device or not
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* @id_*: used to maually switch between host and device modes by idpin
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* @manual_drd_enabled: it's true when supports dual-role device by debugfs
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* to switch host/device modes depending on user input.
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*/
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struct otg_switch_mtk {
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struct regulator *vbus;
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struct extcon_dev *edev;
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struct notifier_block vbus_nb;
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struct notifier_block id_nb;
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struct delayed_work extcon_reg_dwork;
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bool is_u3_drd;
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/* dual-role switch by debugfs */
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struct pinctrl *id_pinctrl;
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struct pinctrl_state *id_float;
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struct pinctrl_state *id_ground;
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bool manual_drd_enabled;
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};
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/**
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* @mac_base: register base address of device MAC, exclude xHCI's
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* @ippc_base: register base address of ip port controller interface (IPPC)
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* @ippc_base: register base address of IP Power and Clock interface (IPPC)
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* @vusb33: usb3.3V shared by device/host IP
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* @sys_clk: system clock of mtu3, shared by device/host IP
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* @dr_mode: works in which mode:
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* host only, device only or dual-role mode
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* @u2_ports: number of usb2.0 host ports
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* @u3_ports: number of usb3.0 host ports
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* @dbgfs_root: only used when supports manual dual-role switch via debugfs
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* @wakeup_en: it's true when supports remote wakeup in host mode
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* @wk_deb_p0: port0's wakeup debounce clock
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* @wk_deb_p1: it's optional, and depends on port1 is supported or not
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@ -196,10 +226,12 @@ struct ssusb_mtk {
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struct regulator *vusb33;
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struct clk *sys_clk;
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/* otg */
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struct otg_switch_mtk otg_switch;
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enum usb_dr_mode dr_mode;
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bool is_host;
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int u2_ports;
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int u3_ports;
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struct dentry *dbgfs_root;
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/* usb wakeup for host mode */
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bool wakeup_en;
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struct clk *wk_deb_p0;
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@ -150,7 +150,6 @@ static void mtu3_intr_disable(struct mtu3 *mtu)
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/* Disable level 1 interrupts */
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mtu3_writel(mbase, U3D_LV1IECR, ~0x0);
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/* Disable endpoint interrupts */
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mtu3_writel(mbase, U3D_EPIECR, ~0x0);
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}
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@ -161,13 +160,10 @@ static void mtu3_intr_status_clear(struct mtu3 *mtu)
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/* Clear EP0 and Tx/Rx EPn interrupts status */
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mtu3_writel(mbase, U3D_EPISR, ~0x0);
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/* Clear U2 USB common interrupts status */
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mtu3_writel(mbase, U3D_COMMON_USB_INTR, ~0x0);
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/* Clear U3 LTSSM interrupts status */
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mtu3_writel(mbase, U3D_LTSSM_INTR, ~0x0);
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/* Clear speed change interrupt status */
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mtu3_writel(mbase, U3D_DEV_LINK_INTR, ~0x0);
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}
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@ -268,7 +264,6 @@ void mtu3_start(struct mtu3 *mtu)
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/* Initialize the default interrupts */
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mtu3_intr_enable(mtu);
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mtu->is_active = 1;
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if (mtu->softconnect)
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@ -516,7 +511,6 @@ static int mtu3_mem_alloc(struct mtu3 *mtu)
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mtu->out_eps = &ep_array[mtu->num_eps];
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/* ep0 uses in_eps[0], out_eps[0] is reserved */
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mtu->ep0 = mtu->in_eps;
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mtu->ep0->mtu = mtu;
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mtu->ep0->epnum = 0;
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@ -560,6 +554,7 @@ static void mtu3_set_speed(struct mtu3 *mtu)
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/* HS/FS detected by HW */
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mtu3_setbits(mbase, U3D_POWER_MANAGEMENT, HS_ENABLE);
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}
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dev_info(mtu->dev, "max_speed: %s\n",
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usb_speed_string(mtu->max_speed));
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}
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@ -586,13 +581,10 @@ static void mtu3_regs_init(struct mtu3 *mtu)
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/* delay about 0.1us from detecting reset to send chirp-K */
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mtu3_clrbits(mbase, U3D_LINK_RESET_INFO, WTCHRP_MSK);
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/* U2/U3 detected by HW */
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mtu3_writel(mbase, U3D_DEVICE_CONF, 0);
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/* enable QMU 16B checksum */
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mtu3_setbits(mbase, U3D_QCR0, QMU_CS16B_EN);
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/* vbus detected by HW */
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mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON);
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}
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@ -838,6 +830,10 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
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goto gadget_err;
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}
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/* init as host mode, power down device IP for power saving */
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if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG)
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mtu3_stop(mtu);
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dev_dbg(dev, " %s() done...\n", __func__);
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return 0;
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379
drivers/usb/mtu3/mtu3_dr.c
Normal file
379
drivers/usb/mtu3/mtu3_dr.c
Normal file
@ -0,0 +1,379 @@
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/*
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* mtu3_dr.c - dual role switch and host glue layer
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*
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* Copyright (C) 2016 MediaTek Inc.
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*
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* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/debugfs.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/of_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include "mtu3.h"
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#include "mtu3_dr.h"
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#define USB2_PORT 2
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#define USB3_PORT 3
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enum mtu3_vbus_id_state {
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MTU3_ID_FLOAT = 1,
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MTU3_ID_GROUND,
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MTU3_VBUS_OFF,
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MTU3_VBUS_VALID,
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};
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static void toggle_opstate(struct ssusb_mtk *ssusb)
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{
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if (!ssusb->otg_switch.is_u3_drd) {
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mtu3_setbits(ssusb->mac_base, U3D_DEVICE_CONTROL, DC_SESSION);
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mtu3_setbits(ssusb->mac_base, U3D_POWER_MANAGEMENT, SOFT_CONN);
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}
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}
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/* only port0 supports dual-role mode */
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static int ssusb_port0_switch(struct ssusb_mtk *ssusb,
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int version, bool tohost)
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{
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void __iomem *ibase = ssusb->ippc_base;
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u32 value;
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dev_dbg(ssusb->dev, "%s (switch u%d port0 to %s)\n", __func__,
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version, tohost ? "host" : "device");
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if (version == USB2_PORT) {
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/* 1. power off and disable u2 port0 */
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value = mtu3_readl(ibase, SSUSB_U2_CTRL(0));
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value |= SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS;
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mtu3_writel(ibase, SSUSB_U2_CTRL(0), value);
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/* 2. power on, enable u2 port0 and select its mode */
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value = mtu3_readl(ibase, SSUSB_U2_CTRL(0));
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value &= ~(SSUSB_U2_PORT_PDN | SSUSB_U2_PORT_DIS);
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value = tohost ? (value | SSUSB_U2_PORT_HOST_SEL) :
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(value & (~SSUSB_U2_PORT_HOST_SEL));
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mtu3_writel(ibase, SSUSB_U2_CTRL(0), value);
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} else {
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/* 1. power off and disable u3 port0 */
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value = mtu3_readl(ibase, SSUSB_U3_CTRL(0));
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value |= SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS;
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mtu3_writel(ibase, SSUSB_U3_CTRL(0), value);
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/* 2. power on, enable u3 port0 and select its mode */
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value = mtu3_readl(ibase, SSUSB_U3_CTRL(0));
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value &= ~(SSUSB_U3_PORT_PDN | SSUSB_U3_PORT_DIS);
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value = tohost ? (value | SSUSB_U3_PORT_HOST_SEL) :
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(value & (~SSUSB_U3_PORT_HOST_SEL));
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mtu3_writel(ibase, SSUSB_U3_CTRL(0), value);
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}
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return 0;
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}
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static void switch_port_to_host(struct ssusb_mtk *ssusb)
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{
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u32 check_clk = 0;
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dev_dbg(ssusb->dev, "%s\n", __func__);
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ssusb_port0_switch(ssusb, USB2_PORT, true);
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if (ssusb->otg_switch.is_u3_drd) {
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ssusb_port0_switch(ssusb, USB3_PORT, true);
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check_clk = SSUSB_U3_MAC_RST_B_STS;
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}
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ssusb_check_clocks(ssusb, check_clk);
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/* after all clocks are stable */
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toggle_opstate(ssusb);
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}
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static void switch_port_to_device(struct ssusb_mtk *ssusb)
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{
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u32 check_clk = 0;
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dev_dbg(ssusb->dev, "%s\n", __func__);
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ssusb_port0_switch(ssusb, USB2_PORT, false);
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if (ssusb->otg_switch.is_u3_drd) {
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ssusb_port0_switch(ssusb, USB3_PORT, false);
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check_clk = SSUSB_U3_MAC_RST_B_STS;
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}
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ssusb_check_clocks(ssusb, check_clk);
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}
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int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on)
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{
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struct ssusb_mtk *ssusb =
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container_of(otg_sx, struct ssusb_mtk, otg_switch);
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struct regulator *vbus = otg_sx->vbus;
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int ret;
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/* vbus is optional */
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if (!vbus)
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return 0;
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dev_dbg(ssusb->dev, "%s: turn %s\n", __func__, is_on ? "on" : "off");
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if (is_on) {
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ret = regulator_enable(vbus);
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if (ret) {
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dev_err(ssusb->dev, "vbus regulator enable failed\n");
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return ret;
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}
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} else {
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regulator_disable(vbus);
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}
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return 0;
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}
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/*
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* switch to host: -> MTU3_VBUS_OFF --> MTU3_ID_GROUND
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* switch to device: -> MTU3_ID_FLOAT --> MTU3_VBUS_VALID
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*/
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static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
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enum mtu3_vbus_id_state status)
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{
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struct ssusb_mtk *ssusb =
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container_of(otg_sx, struct ssusb_mtk, otg_switch);
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struct mtu3 *mtu = ssusb->u3d;
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dev_dbg(ssusb->dev, "mailbox state(%d)\n", status);
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switch (status) {
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case MTU3_ID_GROUND:
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switch_port_to_host(ssusb);
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ssusb_set_vbus(otg_sx, 1);
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ssusb->is_host = true;
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break;
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case MTU3_ID_FLOAT:
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ssusb->is_host = false;
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ssusb_set_vbus(otg_sx, 0);
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switch_port_to_device(ssusb);
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break;
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case MTU3_VBUS_OFF:
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mtu3_stop(mtu);
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pm_relax(ssusb->dev);
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break;
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case MTU3_VBUS_VALID:
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/* avoid suspend when works as device */
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pm_stay_awake(ssusb->dev);
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mtu3_start(mtu);
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break;
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default:
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dev_err(ssusb->dev, "invalid state\n");
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}
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}
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static int ssusb_id_notifier(struct notifier_block *nb,
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unsigned long event, void *ptr)
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{
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struct otg_switch_mtk *otg_sx =
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container_of(nb, struct otg_switch_mtk, id_nb);
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if (event)
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ssusb_set_mailbox(otg_sx, MTU3_ID_GROUND);
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else
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ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT);
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return NOTIFY_DONE;
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}
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static int ssusb_vbus_notifier(struct notifier_block *nb,
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unsigned long event, void *ptr)
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{
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struct otg_switch_mtk *otg_sx =
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container_of(nb, struct otg_switch_mtk, vbus_nb);
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if (event)
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ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID);
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else
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ssusb_set_mailbox(otg_sx, MTU3_VBUS_OFF);
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return NOTIFY_DONE;
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}
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static int ssusb_extcon_register(struct otg_switch_mtk *otg_sx)
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{
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struct ssusb_mtk *ssusb =
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container_of(otg_sx, struct ssusb_mtk, otg_switch);
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struct extcon_dev *edev = otg_sx->edev;
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int ret;
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/* extcon is optional */
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if (!edev)
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return 0;
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otg_sx->vbus_nb.notifier_call = ssusb_vbus_notifier;
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ret = extcon_register_notifier(edev, EXTCON_USB,
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&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);
|
||||
}
|
||||
@ -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_ */
|
||||
|
||||
@ -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);
|
||||
|
||||
|
||||
@ -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);
|
||||
}
|
||||
|
||||
|
||||
@ -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;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user