diff options
author | Wesley Cheng <wcheng@codeaurora.org> | 2020-10-08 16:59:31 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-09 15:14:43 +0200 |
commit | 6c8cf369517640edcb4305b38a27f592a54b7bbe (patch) | |
tree | 8f723400a0ee06d8752fbf433fb47ab3d02a9eeb /drivers/usb/typec | |
parent | 3bfb8239be5753a6d7a77556d09ef99ebed89964 (diff) |
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: Wesley Cheng <wcheng@codeaurora.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20201008235934.8931-2-wcheng@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/typec')
-rw-r--r-- | drivers/usb/typec/Kconfig | 12 | ||||
-rw-r--r-- | drivers/usb/typec/Makefile | 1 | ||||
-rw-r--r-- | drivers/usb/typec/qcom-pmic-typec.c | 262 |
3 files changed, 275 insertions, 0 deletions
diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig index eee8536ae600..6c5908a37ee8 100644 --- a/drivers/usb/typec/Kconfig +++ b/drivers/usb/typec/Kconfig @@ -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" diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile index 671bc2d3cd6a..d03b48c4b864 100644 --- a/drivers/usb/typec/Makefile +++ b/drivers/usb/typec/Makefile @@ -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/ diff --git a/drivers/usb/typec/qcom-pmic-typec.c b/drivers/usb/typec/qcom-pmic-typec.c new file mode 100644 index 000000000000..a0454a80c4a2 --- /dev/null +++ b/drivers/usb/typec/qcom-pmic-typec.c @@ -0,0 +1,262 @@ +// 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", ®); + 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"); |