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274 lines
8.3 KiB
274 lines
8.3 KiB
From 6c4995c9a8ba8841ba640201636954c84f494587 Mon Sep 17 00:00:00 2001
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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
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Date: Fri, 13 Oct 2017 17:10:42 +0800
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Subject: [PATCH 108/224] usb: mtu3: use FORCE/RG_IDDIG to implement manual DRD
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switch
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In order to keep manual DRD switch independent on IDDIG interrupt,
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make use of FORCE/RG_IDDIG instead of IDDIG EINT interrupt to
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implement manual DRD switch function.
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Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
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Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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---
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drivers/usb/mtu3/mtu3.h | 18 ++++++++----
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drivers/usb/mtu3/mtu3_dr.c | 61 ++++++++++++++++++++++++++++++-----------
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drivers/usb/mtu3/mtu3_dr.h | 6 ++++
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drivers/usb/mtu3/mtu3_host.c | 5 ++++
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drivers/usb/mtu3/mtu3_hw_regs.h | 2 ++
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drivers/usb/mtu3/mtu3_plat.c | 38 ++-----------------------
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6 files changed, 74 insertions(+), 56 deletions(-)
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--- a/drivers/usb/mtu3/mtu3.h
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+++ b/drivers/usb/mtu3/mtu3.h
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@@ -115,6 +115,19 @@ enum mtu3_g_ep0_state {
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};
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/**
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+ * MTU3_DR_FORCE_NONE: automatically switch host and periperal mode
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+ * by IDPIN signal.
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+ * MTU3_DR_FORCE_HOST: force to enter host mode and override OTG
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+ * IDPIN signal.
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+ * MTU3_DR_FORCE_DEVICE: force to enter peripheral mode.
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+ */
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+enum mtu3_dr_force_mode {
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+ MTU3_DR_FORCE_NONE = 0,
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+ MTU3_DR_FORCE_HOST,
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+ MTU3_DR_FORCE_DEVICE,
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+};
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+
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+/**
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* @base: the base address of fifo
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* @limit: the bitmap size in bits
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* @bitmap: fifo bitmap in unit of @MTU3_EP_FIFO_UNIT
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@@ -196,7 +209,6 @@ struct mtu3_gpd_ring {
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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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@@ -207,10 +219,6 @@ struct otg_switch_mtk {
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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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--- a/drivers/usb/mtu3/mtu3_dr.c
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+++ b/drivers/usb/mtu3/mtu3_dr.c
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@@ -261,21 +261,22 @@ static void extcon_register_dwork(struct
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* depending on user input.
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* This is useful in special cases, such as uses TYPE-A receptacle but also
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* wants to support dual-role mode.
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- * It generates cable state changes by pulling up/down IDPIN and
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- * notifies driver to switch mode by "extcon-usb-gpio".
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- * NOTE: when use MICRO receptacle, should not enable this interface.
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*/
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static void ssusb_mode_manual_switch(struct ssusb_mtk *ssusb, int to_host)
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{
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struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
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- if (to_host)
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- pinctrl_select_state(otg_sx->id_pinctrl, otg_sx->id_ground);
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- else
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- pinctrl_select_state(otg_sx->id_pinctrl, otg_sx->id_float);
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+ if (to_host) {
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+ ssusb_set_force_mode(ssusb, MTU3_DR_FORCE_HOST);
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+ ssusb_set_mailbox(otg_sx, MTU3_VBUS_OFF);
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+ ssusb_set_mailbox(otg_sx, MTU3_ID_GROUND);
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+ } else {
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+ ssusb_set_force_mode(ssusb, MTU3_DR_FORCE_DEVICE);
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+ ssusb_set_mailbox(otg_sx, MTU3_ID_FLOAT);
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+ ssusb_set_mailbox(otg_sx, MTU3_VBUS_VALID);
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+ }
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}
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-
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static int ssusb_mode_show(struct seq_file *sf, void *unused)
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{
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struct ssusb_mtk *ssusb = sf->private;
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@@ -388,17 +389,45 @@ static void ssusb_debugfs_exit(struct ss
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debugfs_remove_recursive(ssusb->dbgfs_root);
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}
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+void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
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+ enum mtu3_dr_force_mode mode)
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+{
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+ u32 value;
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+
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+ value = mtu3_readl(ssusb->ippc_base, SSUSB_U2_CTRL(0));
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+ switch (mode) {
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+ case MTU3_DR_FORCE_DEVICE:
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+ value |= SSUSB_U2_PORT_FORCE_IDDIG | SSUSB_U2_PORT_RG_IDDIG;
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+ break;
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+ case MTU3_DR_FORCE_HOST:
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+ value |= SSUSB_U2_PORT_FORCE_IDDIG;
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+ value &= ~SSUSB_U2_PORT_RG_IDDIG;
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+ break;
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+ case MTU3_DR_FORCE_NONE:
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+ value &= ~(SSUSB_U2_PORT_FORCE_IDDIG | SSUSB_U2_PORT_RG_IDDIG);
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+ break;
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+ default:
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+ return;
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+ }
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+ mtu3_writel(ssusb->ippc_base, SSUSB_U2_CTRL(0), value);
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+}
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+
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int ssusb_otg_switch_init(struct ssusb_mtk *ssusb)
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{
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struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
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- INIT_DELAYED_WORK(&otg_sx->extcon_reg_dwork, extcon_register_dwork);
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-
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- if (otg_sx->manual_drd_enabled)
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+ if (otg_sx->manual_drd_enabled) {
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ssusb_debugfs_init(ssusb);
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+ } else {
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+ INIT_DELAYED_WORK(&otg_sx->extcon_reg_dwork,
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+ extcon_register_dwork);
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- /* It is enough to delay 1s for waiting for host initialization */
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- schedule_delayed_work(&otg_sx->extcon_reg_dwork, HZ);
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+ /*
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+ * It is enough to delay 1s for waiting for
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+ * host initialization
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+ */
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+ schedule_delayed_work(&otg_sx->extcon_reg_dwork, HZ);
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+ }
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return 0;
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}
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@@ -407,8 +436,8 @@ void ssusb_otg_switch_exit(struct ssusb_
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{
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struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
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- cancel_delayed_work(&otg_sx->extcon_reg_dwork);
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-
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if (otg_sx->manual_drd_enabled)
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ssusb_debugfs_exit(ssusb);
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+ else
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+ cancel_delayed_work(&otg_sx->extcon_reg_dwork);
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}
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--- a/drivers/usb/mtu3/mtu3_dr.h
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+++ b/drivers/usb/mtu3/mtu3_dr.h
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@@ -87,6 +87,8 @@ static inline void ssusb_gadget_exit(str
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int ssusb_otg_switch_init(struct ssusb_mtk *ssusb);
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void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb);
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int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on);
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+void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
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+ enum mtu3_dr_force_mode mode);
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#else
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@@ -103,6 +105,10 @@ static inline int ssusb_set_vbus(struct
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return 0;
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}
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+static inline void
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+ssusb_set_force_mode(struct ssusb_mtk *ssusb, enum mtu3_dr_force_mode mode)
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+{}
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+
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#endif
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#endif /* _MTU3_DR_H_ */
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--- a/drivers/usb/mtu3/mtu3_host.c
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+++ b/drivers/usb/mtu3/mtu3_host.c
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@@ -189,6 +189,8 @@ int ssusb_host_disable(struct ssusb_mtk
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static void ssusb_host_setup(struct ssusb_mtk *ssusb)
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{
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+ struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
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+
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host_ports_num_get(ssusb);
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/*
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@@ -197,6 +199,9 @@ static void ssusb_host_setup(struct ssus
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*/
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ssusb_host_enable(ssusb);
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+ if (otg_sx->manual_drd_enabled)
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+ ssusb_set_force_mode(ssusb, MTU3_DR_FORCE_HOST);
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+
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/* if port0 supports dual-role, works as host mode by default */
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ssusb_set_vbus(&ssusb->otg_switch, 1);
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}
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--- a/drivers/usb/mtu3/mtu3_hw_regs.h
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+++ b/drivers/usb/mtu3/mtu3_hw_regs.h
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@@ -472,6 +472,8 @@
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#define SSUSB_U3_PORT_DIS BIT(0)
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/* U3D_SSUSB_U2_CTRL_0P */
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+#define SSUSB_U2_PORT_RG_IDDIG BIT(12)
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+#define SSUSB_U2_PORT_FORCE_IDDIG BIT(11)
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#define SSUSB_U2_PORT_VBUSVALID BIT(9)
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#define SSUSB_U2_PORT_OTG_SEL BIT(7)
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#define SSUSB_U2_PORT_HOST BIT(2)
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--- a/drivers/usb/mtu3/mtu3_plat.c
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+++ b/drivers/usb/mtu3/mtu3_plat.c
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@@ -21,7 +21,6 @@
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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-#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include "mtu3.h"
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@@ -212,33 +211,6 @@ static void ssusb_ip_sw_reset(struct ssu
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mtu3_clrbits(ssusb->ippc_base, U3D_SSUSB_IP_PW_CTRL0, SSUSB_IP_SW_RST);
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}
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-static int get_iddig_pinctrl(struct ssusb_mtk *ssusb)
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-{
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- struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
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-
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- otg_sx->id_pinctrl = devm_pinctrl_get(ssusb->dev);
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- if (IS_ERR(otg_sx->id_pinctrl)) {
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- dev_err(ssusb->dev, "Cannot find id pinctrl!\n");
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- return PTR_ERR(otg_sx->id_pinctrl);
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- }
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-
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- otg_sx->id_float =
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- pinctrl_lookup_state(otg_sx->id_pinctrl, "id_float");
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- if (IS_ERR(otg_sx->id_float)) {
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- dev_err(ssusb->dev, "Cannot find pinctrl id_float!\n");
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- return PTR_ERR(otg_sx->id_float);
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- }
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-
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- otg_sx->id_ground =
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- pinctrl_lookup_state(otg_sx->id_pinctrl, "id_ground");
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- if (IS_ERR(otg_sx->id_ground)) {
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- dev_err(ssusb->dev, "Cannot find pinctrl id_ground!\n");
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- return PTR_ERR(otg_sx->id_ground);
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- }
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-
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- return 0;
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-}
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-
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/* ignore the error if the clock does not exist */
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static struct clk *get_optional_clk(struct device *dev, const char *id)
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{
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@@ -349,15 +321,11 @@ static int get_ssusb_rscs(struct platfor
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dev_err(ssusb->dev, "couldn't get extcon device\n");
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return -EPROBE_DEFER;
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}
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- if (otg_sx->manual_drd_enabled) {
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- ret = get_iddig_pinctrl(ssusb);
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- if (ret)
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- return ret;
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- }
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}
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- dev_info(dev, "dr_mode: %d, is_u3_dr: %d, u3p_dis_msk:%x\n",
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- ssusb->dr_mode, otg_sx->is_u3_drd, ssusb->u3p_dis_msk);
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+ dev_info(dev, "dr_mode: %d, is_u3_dr: %d, u3p_dis_msk: %x, drd: %s\n",
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+ ssusb->dr_mode, otg_sx->is_u3_drd, ssusb->u3p_dis_msk,
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+ otg_sx->manual_drd_enabled ? "manual" : "auto");
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return 0;
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}
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