Commit 6c8cf369 authored by Wesley Cheng's avatar Wesley Cheng Committed by Greg Kroah-Hartman

usb: typec: Add QCOM PMIC typec detection driver

The QCOM SPMI typec driver handles the role and orientation detection, and
notifies client drivers using the USB role switch framework.   It registers
as a typec port, so orientation can be communicated using the typec switch
APIs.  The driver also attains a handle to the VBUS output regulator, so it
can enable/disable the VBUS source when acting as a host/device.
Signed-off-by: default avatarWesley Cheng <wcheng@codeaurora.org>
Acked-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: default avatarStephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20201008235934.8931-2-wcheng@codeaurora.orgSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3bfb8239
......@@ -85,6 +85,18 @@ config TYPEC_STUSB160X
If you choose to build this driver as a dynamically linked module, the
module will be called stusb160x.ko.
config TYPEC_QCOM_PMIC
tristate "Qualcomm PMIC USB Type-C driver"
depends on ARCH_QCOM || COMPILE_TEST
help
Driver for supporting role switch over the Qualcomm PMIC. This will
handle the USB Type-C role and orientation detection reported by the
QCOM PMIC if the PMIC has the capability to handle USB Type-C
detection.
It will also enable the VBUS output to connected devices when a
DFP connection is made.
source "drivers/usb/typec/mux/Kconfig"
source "drivers/usb/typec/altmodes/Kconfig"
......
......@@ -6,5 +6,6 @@ obj-$(CONFIG_TYPEC_TCPM) += tcpm/
obj-$(CONFIG_TYPEC_UCSI) += ucsi/
obj-$(CONFIG_TYPEC_HD3SS3220) += hd3ss3220.o
obj-$(CONFIG_TYPEC_TPS6598X) += tps6598x.o
obj-$(CONFIG_TYPEC_QCOM_PMIC) += qcom-pmic-typec.o
obj-$(CONFIG_TYPEC_STUSB160X) += stusb160x.o
obj-$(CONFIG_TYPEC) += mux/
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
*/
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/usb/role.h>
#include <linux/usb/typec_mux.h>
#define TYPEC_MISC_STATUS 0xb
#define CC_ATTACHED BIT(0)
#define CC_ORIENTATION BIT(1)
#define SNK_SRC_MODE BIT(6)
#define TYPEC_MODE_CFG 0x44
#define TYPEC_DISABLE_CMD BIT(0)
#define EN_SNK_ONLY BIT(1)
#define EN_SRC_ONLY BIT(2)
#define TYPEC_VCONN_CONTROL 0x46
#define VCONN_EN_SRC BIT(0)
#define VCONN_EN_VAL BIT(1)
#define TYPEC_EXIT_STATE_CFG 0x50
#define SEL_SRC_UPPER_REF BIT(2)
#define TYPEC_INTR_EN_CFG_1 0x5e
#define TYPEC_INTR_EN_CFG_1_MASK GENMASK(7, 0)
struct qcom_pmic_typec {
struct device *dev;
struct regmap *regmap;
u32 base;
struct typec_port *port;
struct usb_role_switch *role_sw;
struct regulator *vbus_reg;
bool vbus_enabled;
};
static void qcom_pmic_typec_enable_vbus_regulator(struct qcom_pmic_typec
*qcom_usb, bool enable)
{
int ret;
if (enable == qcom_usb->vbus_enabled)
return;
if (enable) {
ret = regulator_enable(qcom_usb->vbus_reg);
if (ret)
return;
} else {
ret = regulator_disable(qcom_usb->vbus_reg);
if (ret)
return;
}
qcom_usb->vbus_enabled = enable;
}
static void qcom_pmic_typec_check_connection(struct qcom_pmic_typec *qcom_usb)
{
enum typec_orientation orientation;
enum usb_role role;
unsigned int stat;
bool enable_vbus;
regmap_read(qcom_usb->regmap, qcom_usb->base + TYPEC_MISC_STATUS,
&stat);
if (stat & CC_ATTACHED) {
orientation = (stat & CC_ORIENTATION) ?
TYPEC_ORIENTATION_REVERSE :
TYPEC_ORIENTATION_NORMAL;
typec_set_orientation(qcom_usb->port, orientation);
role = (stat & SNK_SRC_MODE) ? USB_ROLE_HOST : USB_ROLE_DEVICE;
if (role == USB_ROLE_HOST)
enable_vbus = true;
else
enable_vbus = false;
} else {
role = USB_ROLE_NONE;
enable_vbus = false;
}
qcom_pmic_typec_enable_vbus_regulator(qcom_usb, enable_vbus);
usb_role_switch_set_role(qcom_usb->role_sw, role);
}
static irqreturn_t qcom_pmic_typec_interrupt(int irq, void *_qcom_usb)
{
struct qcom_pmic_typec *qcom_usb = _qcom_usb;
qcom_pmic_typec_check_connection(qcom_usb);
return IRQ_HANDLED;
}
static void qcom_pmic_typec_typec_hw_init(struct qcom_pmic_typec *qcom_usb,
enum typec_port_type type)
{
u8 mode = 0;
regmap_update_bits(qcom_usb->regmap,
qcom_usb->base + TYPEC_INTR_EN_CFG_1,
TYPEC_INTR_EN_CFG_1_MASK, 0);
if (type == TYPEC_PORT_SRC)
mode = EN_SRC_ONLY;
else if (type == TYPEC_PORT_SNK)
mode = EN_SNK_ONLY;
regmap_update_bits(qcom_usb->regmap, qcom_usb->base + TYPEC_MODE_CFG,
EN_SNK_ONLY | EN_SRC_ONLY, mode);
regmap_update_bits(qcom_usb->regmap,
qcom_usb->base + TYPEC_VCONN_CONTROL,
VCONN_EN_SRC | VCONN_EN_VAL, VCONN_EN_SRC);
regmap_update_bits(qcom_usb->regmap,
qcom_usb->base + TYPEC_EXIT_STATE_CFG,
SEL_SRC_UPPER_REF, SEL_SRC_UPPER_REF);
}
static int qcom_pmic_typec_probe(struct platform_device *pdev)
{
struct qcom_pmic_typec *qcom_usb;
struct device *dev = &pdev->dev;
struct fwnode_handle *fwnode;
struct typec_capability cap;
const char *buf;
int ret, irq, role;
u32 reg;
ret = device_property_read_u32(dev, "reg", &reg);
if (ret < 0) {
dev_err(dev, "missing base address\n");
return ret;
}
qcom_usb = devm_kzalloc(dev, sizeof(*qcom_usb), GFP_KERNEL);
if (!qcom_usb)
return -ENOMEM;
qcom_usb->dev = dev;
qcom_usb->base = reg;
qcom_usb->regmap = dev_get_regmap(dev->parent, NULL);
if (!qcom_usb->regmap) {
dev_err(dev, "Failed to get regmap\n");
return -EINVAL;
}
qcom_usb->vbus_reg = devm_regulator_get(qcom_usb->dev, "usb_vbus");
if (IS_ERR(qcom_usb->vbus_reg))
return PTR_ERR(qcom_usb->vbus_reg);
fwnode = device_get_named_child_node(dev, "connector");
if (!fwnode)
return -EINVAL;
ret = fwnode_property_read_string(fwnode, "power-role", &buf);
if (!ret) {
role = typec_find_port_power_role(buf);
if (role < 0)
role = TYPEC_PORT_SNK;
} else {
role = TYPEC_PORT_SNK;
}
cap.type = role;
ret = fwnode_property_read_string(fwnode, "data-role", &buf);
if (!ret) {
role = typec_find_port_data_role(buf);
if (role < 0)
role = TYPEC_PORT_UFP;
} else {
role = TYPEC_PORT_UFP;
}
cap.data = role;
cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
cap.fwnode = fwnode;
qcom_usb->port = typec_register_port(dev, &cap);
if (IS_ERR(qcom_usb->port)) {
ret = PTR_ERR(qcom_usb->port);
dev_err(dev, "Failed to register type c port %d\n", ret);
goto err_put_node;
}
fwnode_handle_put(fwnode);
qcom_usb->role_sw = fwnode_usb_role_switch_get(dev_fwnode(qcom_usb->dev));
if (IS_ERR(qcom_usb->role_sw)) {
if (PTR_ERR(qcom_usb->role_sw) != -EPROBE_DEFER)
dev_err(dev, "failed to get role switch\n");
ret = PTR_ERR(qcom_usb->role_sw);
goto err_typec_port;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
goto err_usb_role_sw;
ret = devm_request_threaded_irq(qcom_usb->dev, irq, NULL,
qcom_pmic_typec_interrupt, IRQF_ONESHOT,
"qcom-pmic-typec", qcom_usb);
if (ret) {
dev_err(&pdev->dev, "Could not request IRQ\n");
goto err_usb_role_sw;
}
platform_set_drvdata(pdev, qcom_usb);
qcom_pmic_typec_typec_hw_init(qcom_usb, cap.type);
qcom_pmic_typec_check_connection(qcom_usb);
return 0;
err_usb_role_sw:
usb_role_switch_put(qcom_usb->role_sw);
err_typec_port:
typec_unregister_port(qcom_usb->port);
err_put_node:
fwnode_handle_put(fwnode);
return ret;
}
static int qcom_pmic_typec_remove(struct platform_device *pdev)
{
struct qcom_pmic_typec *qcom_usb = platform_get_drvdata(pdev);
usb_role_switch_set_role(qcom_usb->role_sw, USB_ROLE_NONE);
qcom_pmic_typec_enable_vbus_regulator(qcom_usb, 0);
typec_unregister_port(qcom_usb->port);
usb_role_switch_put(qcom_usb->role_sw);
return 0;
}
static const struct of_device_id qcom_pmic_typec_table[] = {
{ .compatible = "qcom,pm8150b-usb-typec" },
{ }
};
MODULE_DEVICE_TABLE(of, qcom_pmic_typec_table);
static struct platform_driver qcom_pmic_typec = {
.driver = {
.name = "qcom,pmic-typec",
.of_match_table = qcom_pmic_typec_table,
},
.probe = qcom_pmic_typec_probe,
.remove = qcom_pmic_typec_remove,
};
module_platform_driver(qcom_pmic_typec);
MODULE_DESCRIPTION("QCOM PMIC USB type C driver");
MODULE_LICENSE("GPL v2");
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