| Message ID | 20230130-topic-sm8450-upstream-pmic-glink-v1-1-0b0acfad301e@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | soc: qcom: add UCSI function to PMIC GLINK | expand |
On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote: > Introduce the UCSI PMIC Glink aux driver that communicates > with the aDSP firmware with the UCSI protocol which handles > the USB-C Port(s) Power Delivery. > > The UCSI messaging is necessary on newer Qualcomm SoCs to > provide USB role switch and altmode notifications. > > Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> > --- > drivers/usb/typec/ucsi/Kconfig | 7 + > drivers/usb/typec/ucsi/Makefile | 1 + > drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 329 insertions(+) > > diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig > index 8f9c4b9f31f7..dee6069e46a2 100644 > --- a/drivers/usb/typec/ucsi/Kconfig > +++ b/drivers/usb/typec/ucsi/Kconfig > @@ -58,4 +58,11 @@ config UCSI_STM32G0 > To compile the driver as a module, choose M here: the module will be > called ucsi_stm32g0. > > +config UCSI_PMIC_GLINK > + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" > + depends on QCOM_PMIC_GLINK No way to test build this code without this option? > + help > + This driver enables UCSI support on platforms that expose UCSI > + interface as PMIC GLINK device. Module name when built? A follow-on patch can be sent, this is minor. thanks, greg k-h
On 31/01/2023 10:16, Greg Kroah-Hartman wrote: > On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote: >> Introduce the UCSI PMIC Glink aux driver that communicates >> with the aDSP firmware with the UCSI protocol which handles >> the USB-C Port(s) Power Delivery. >> >> The UCSI messaging is necessary on newer Qualcomm SoCs to >> provide USB role switch and altmode notifications. >> >> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> >> --- >> drivers/usb/typec/ucsi/Kconfig | 7 + >> drivers/usb/typec/ucsi/Makefile | 1 + >> drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ >> 3 files changed, 329 insertions(+) >> >> diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig >> index 8f9c4b9f31f7..dee6069e46a2 100644 >> --- a/drivers/usb/typec/ucsi/Kconfig >> +++ b/drivers/usb/typec/ucsi/Kconfig >> @@ -58,4 +58,11 @@ config UCSI_STM32G0 >> To compile the driver as a module, choose M here: the module will be >> called ucsi_stm32g0. >> >> +config UCSI_PMIC_GLINK >> + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" >> + depends on QCOM_PMIC_GLINK > > No way to test build this code without this option? Nop, the QCOM_PMIC_GLINK is a build dependency, this can't be removed > >> + help >> + This driver enables UCSI support on platforms that expose UCSI >> + interface as PMIC GLINK device. > > Module name when built? OK will add a follow-patch if needed Thanks, Neil > > A follow-on patch can be sent, this is minor. > > thanks, > > greg k-h
On Fri, Feb 10, 2023 at 11:31:08AM +0100, Neil Armstrong wrote: > On 31/01/2023 10:16, Greg Kroah-Hartman wrote: > > On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote: > > > Introduce the UCSI PMIC Glink aux driver that communicates > > > with the aDSP firmware with the UCSI protocol which handles > > > the USB-C Port(s) Power Delivery. > > > > > > The UCSI messaging is necessary on newer Qualcomm SoCs to > > > provide USB role switch and altmode notifications. > > > > > > Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> > > > --- > > > drivers/usb/typec/ucsi/Kconfig | 7 + > > > drivers/usb/typec/ucsi/Makefile | 1 + > > > drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ > > > 3 files changed, 329 insertions(+) > > > > > > diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig > > > index 8f9c4b9f31f7..dee6069e46a2 100644 > > > --- a/drivers/usb/typec/ucsi/Kconfig > > > +++ b/drivers/usb/typec/ucsi/Kconfig > > > @@ -58,4 +58,11 @@ config UCSI_STM32G0 > > > To compile the driver as a module, choose M here: the module will be > > > called ucsi_stm32g0. > > > +config UCSI_PMIC_GLINK > > > + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" > > > + depends on QCOM_PMIC_GLINK > > > > No way to test build this code without this option? > > Nop, the QCOM_PMIC_GLINK is a build dependency, this can't be removed Then perhaps the QCOM_PMIC_GLINK code needs to be fixed up to allow for it to be built on all platforms properly? Otherwise you are guaranteeing you will not get much, if any, build coverage and api changes will cause this code to stagnate over time :( thanks, greg k-h
On 10/02/2023 11:38, Greg Kroah-Hartman wrote: > On Fri, Feb 10, 2023 at 11:31:08AM +0100, Neil Armstrong wrote: >> On 31/01/2023 10:16, Greg Kroah-Hartman wrote: >>> On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote: >>>> Introduce the UCSI PMIC Glink aux driver that communicates >>>> with the aDSP firmware with the UCSI protocol which handles >>>> the USB-C Port(s) Power Delivery. >>>> >>>> The UCSI messaging is necessary on newer Qualcomm SoCs to >>>> provide USB role switch and altmode notifications. >>>> >>>> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> >>>> --- >>>> drivers/usb/typec/ucsi/Kconfig | 7 + >>>> drivers/usb/typec/ucsi/Makefile | 1 + >>>> drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ >>>> 3 files changed, 329 insertions(+) >>>> >>>> diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig >>>> index 8f9c4b9f31f7..dee6069e46a2 100644 >>>> --- a/drivers/usb/typec/ucsi/Kconfig >>>> +++ b/drivers/usb/typec/ucsi/Kconfig >>>> @@ -58,4 +58,11 @@ config UCSI_STM32G0 >>>> To compile the driver as a module, choose M here: the module will be >>>> called ucsi_stm32g0. >>>> +config UCSI_PMIC_GLINK >>>> + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" >>>> + depends on QCOM_PMIC_GLINK >>> >>> No way to test build this code without this option? >> >> Nop, the QCOM_PMIC_GLINK is a build dependency, this can't be removed > > Then perhaps the QCOM_PMIC_GLINK code needs to be fixed up to allow for > it to be built on all platforms properly? Otherwise you are > guaranteeing you will not get much, if any, build coverage and api > changes will cause this code to stagnate over time :( The QCOM_PMIC_GLINK deps are: depends on RPMSG depends on TYPEC depends on DRM depends on NET depends on OF select AUXILIARY_BUS select QCOM_PDR_HELPERS What would be the changes needed here ? Neil > > thanks, > > greg k-h
On Fri, Feb 10, 2023 at 11:44:22AM +0100, Neil Armstrong wrote: > On 10/02/2023 11:38, Greg Kroah-Hartman wrote: > > On Fri, Feb 10, 2023 at 11:31:08AM +0100, Neil Armstrong wrote: > > > On 31/01/2023 10:16, Greg Kroah-Hartman wrote: > > > > On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote: > > > > > Introduce the UCSI PMIC Glink aux driver that communicates > > > > > with the aDSP firmware with the UCSI protocol which handles > > > > > the USB-C Port(s) Power Delivery. > > > > > > > > > > The UCSI messaging is necessary on newer Qualcomm SoCs to > > > > > provide USB role switch and altmode notifications. > > > > > > > > > > Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> > > > > > --- > > > > > drivers/usb/typec/ucsi/Kconfig | 7 + > > > > > drivers/usb/typec/ucsi/Makefile | 1 + > > > > > drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ > > > > > 3 files changed, 329 insertions(+) > > > > > > > > > > diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig > > > > > index 8f9c4b9f31f7..dee6069e46a2 100644 > > > > > --- a/drivers/usb/typec/ucsi/Kconfig > > > > > +++ b/drivers/usb/typec/ucsi/Kconfig > > > > > @@ -58,4 +58,11 @@ config UCSI_STM32G0 > > > > > To compile the driver as a module, choose M here: the module will be > > > > > called ucsi_stm32g0. > > > > > +config UCSI_PMIC_GLINK > > > > > + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" > > > > > + depends on QCOM_PMIC_GLINK > > > > > > > > No way to test build this code without this option? > > > > > > Nop, the QCOM_PMIC_GLINK is a build dependency, this can't be removed > > > > Then perhaps the QCOM_PMIC_GLINK code needs to be fixed up to allow for > > it to be built on all platforms properly? Otherwise you are > > guaranteeing you will not get much, if any, build coverage and api > > changes will cause this code to stagnate over time :( > > The QCOM_PMIC_GLINK deps are: > depends on RPMSG > depends on TYPEC > depends on DRM > depends on NET > depends on OF > select AUXILIARY_BUS > select QCOM_PDR_HELPERS > > What would be the changes needed here ? I do not know, try unwinding it and maybe just adding a COMPILE_TEST build option in a few places is all that is needed? thanks, greg k-h
On 10/02/2023 12:01, Greg Kroah-Hartman wrote: > On Fri, Feb 10, 2023 at 11:44:22AM +0100, Neil Armstrong wrote: >> On 10/02/2023 11:38, Greg Kroah-Hartman wrote: >>> On Fri, Feb 10, 2023 at 11:31:08AM +0100, Neil Armstrong wrote: >>>> On 31/01/2023 10:16, Greg Kroah-Hartman wrote: >>>>> On Mon, Jan 30, 2023 at 10:54:32AM +0100, Neil Armstrong wrote: >>>>>> Introduce the UCSI PMIC Glink aux driver that communicates >>>>>> with the aDSP firmware with the UCSI protocol which handles >>>>>> the USB-C Port(s) Power Delivery. >>>>>> >>>>>> The UCSI messaging is necessary on newer Qualcomm SoCs to >>>>>> provide USB role switch and altmode notifications. >>>>>> >>>>>> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> >>>>>> --- >>>>>> drivers/usb/typec/ucsi/Kconfig | 7 + >>>>>> drivers/usb/typec/ucsi/Makefile | 1 + >>>>>> drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ >>>>>> 3 files changed, 329 insertions(+) >>>>>> >>>>>> diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig >>>>>> index 8f9c4b9f31f7..dee6069e46a2 100644 >>>>>> --- a/drivers/usb/typec/ucsi/Kconfig >>>>>> +++ b/drivers/usb/typec/ucsi/Kconfig >>>>>> @@ -58,4 +58,11 @@ config UCSI_STM32G0 >>>>>> To compile the driver as a module, choose M here: the module will be >>>>>> called ucsi_stm32g0. >>>>>> +config UCSI_PMIC_GLINK >>>>>> + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" >>>>>> + depends on QCOM_PMIC_GLINK >>>>> >>>>> No way to test build this code without this option? >>>> >>>> Nop, the QCOM_PMIC_GLINK is a build dependency, this can't be removed >>> >>> Then perhaps the QCOM_PMIC_GLINK code needs to be fixed up to allow for >>> it to be built on all platforms properly? Otherwise you are >>> guaranteeing you will not get much, if any, build coverage and api >>> changes will cause this code to stagnate over time :( >> >> The QCOM_PMIC_GLINK deps are: >> depends on RPMSG >> depends on TYPEC >> depends on DRM >> depends on NET >> depends on OF >> select AUXILIARY_BUS >> select QCOM_PDR_HELPERS >> >> What would be the changes needed here ? > > I do not know, try unwinding it and maybe just adding a COMPILE_TEST > build option in a few places is all that is needed? Sure, I'll investigate and send a separate patch for that. Thanks, Neil > > thanks, > > greg k-h
diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig index 8f9c4b9f31f7..dee6069e46a2 100644 --- a/drivers/usb/typec/ucsi/Kconfig +++ b/drivers/usb/typec/ucsi/Kconfig @@ -58,4 +58,11 @@ config UCSI_STM32G0 To compile the driver as a module, choose M here: the module will be called ucsi_stm32g0. +config UCSI_PMIC_GLINK + tristate "UCSI Qualcomm PMIC GLINK Interface Driver" + depends on QCOM_PMIC_GLINK + help + This driver enables UCSI support on platforms that expose UCSI + interface as PMIC GLINK device. + endif diff --git a/drivers/usb/typec/ucsi/Makefile b/drivers/usb/typec/ucsi/Makefile index 480d533d762f..77f09e136956 100644 --- a/drivers/usb/typec/ucsi/Makefile +++ b/drivers/usb/typec/ucsi/Makefile @@ -18,3 +18,4 @@ endif obj-$(CONFIG_UCSI_ACPI) += ucsi_acpi.o obj-$(CONFIG_UCSI_CCG) += ucsi_ccg.o obj-$(CONFIG_UCSI_STM32G0) += ucsi_stm32g0.o +obj-$(CONFIG_UCSI_PMIC_GLINK) += ucsi_glink.o diff --git a/drivers/usb/typec/ucsi/ucsi_glink.c b/drivers/usb/typec/ucsi/ucsi_glink.c new file mode 100644 index 000000000000..824ed6620de7 --- /dev/null +++ b/drivers/usb/typec/ucsi/ucsi_glink.c @@ -0,0 +1,321 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2019-2020, The Linux Foundation. All rights reserved. + * Copyright (c) 2022-2023, Linaro Ltd + */ +#include <linux/auxiliary_bus.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/mutex.h> +#include <linux/property.h> +#include <linux/soc/qcom/pdr.h> +#include <linux/soc/qcom/pmic_glink.h> +#include "ucsi.h" + +#define UCSI_BUF_SIZE 48 + +#define MSG_TYPE_REQ_RESP 1 +#define UCSI_BUF_SIZE 48 + +#define UC_NOTIFY_RECEIVER_UCSI 0x0 +#define UC_UCSI_READ_BUF_REQ 0x11 +#define UC_UCSI_WRITE_BUF_REQ 0x12 +#define UC_UCSI_USBC_NOTIFY_IND 0x13 + +struct ucsi_read_buf_req_msg { + struct pmic_glink_hdr hdr; +}; + +struct ucsi_read_buf_resp_msg { + struct pmic_glink_hdr hdr; + u8 buf[UCSI_BUF_SIZE]; + u32 ret_code; +}; + +struct ucsi_write_buf_req_msg { + struct pmic_glink_hdr hdr; + u8 buf[UCSI_BUF_SIZE]; + u32 reserved; +}; + +struct ucsi_write_buf_resp_msg { + struct pmic_glink_hdr hdr; + u32 ret_code; +}; + +struct ucsi_notify_ind_msg { + struct pmic_glink_hdr hdr; + u32 notification; + u32 receiver; + u32 reserved; +}; + +struct pmic_glink_ucsi { + struct device *dev; + + struct pmic_glink_client *client; + + struct ucsi *ucsi; + struct completion read_ack; + struct completion write_ack; + struct completion sync_ack; + bool sync_pending; + struct mutex lock; /* protects concurrent access to PMIC Glink interface */ + + int sync_val; + + struct work_struct notify_work; + struct work_struct register_work; + + u8 read_buf[UCSI_BUF_SIZE]; +}; + +static int pmic_glink_ucsi_read(struct ucsi *__ucsi, unsigned int offset, + void *val, size_t val_len) +{ + struct pmic_glink_ucsi *ucsi = ucsi_get_drvdata(__ucsi); + struct ucsi_read_buf_req_msg req = {}; + unsigned long left; + int ret; + + req.hdr.owner = PMIC_GLINK_OWNER_USBC; + req.hdr.type = MSG_TYPE_REQ_RESP; + req.hdr.opcode = UC_UCSI_READ_BUF_REQ; + + mutex_lock(&ucsi->lock); + memset(ucsi->read_buf, 0, sizeof(ucsi->read_buf)); + reinit_completion(&ucsi->read_ack); + + ret = pmic_glink_send(ucsi->client, &req, sizeof(req)); + if (ret < 0) { + dev_err(ucsi->dev, "failed to send UCSI read request: %d\n", ret); + goto out_unlock; + } + + left = wait_for_completion_timeout(&ucsi->read_ack, 5 * HZ); + if (!left) { + dev_err(ucsi->dev, "timeout waiting for UCSI read response\n"); + ret = -ETIMEDOUT; + goto out_unlock; + } + + memcpy(val, &ucsi->read_buf[offset], val_len); + ret = 0; + +out_unlock: + mutex_unlock(&ucsi->lock); + + return ret; +} + +static int pmic_glink_ucsi_locked_write(struct pmic_glink_ucsi *ucsi, unsigned int offset, + const void *val, size_t val_len) +{ + struct ucsi_write_buf_req_msg req = {}; + unsigned long left; + int ret; + + req.hdr.owner = PMIC_GLINK_OWNER_USBC; + req.hdr.type = MSG_TYPE_REQ_RESP; + req.hdr.opcode = UC_UCSI_WRITE_BUF_REQ; + memcpy(&req.buf[offset], val, val_len); + + reinit_completion(&ucsi->write_ack); + + ret = pmic_glink_send(ucsi->client, &req, sizeof(req)); + if (ret < 0) { + dev_err(ucsi->dev, "failed to send UCSI write request: %d\n", ret); + return ret; + } + + left = wait_for_completion_timeout(&ucsi->write_ack, 5 * HZ); + if (!left) { + dev_err(ucsi->dev, "timeout waiting for UCSI write response\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static int pmic_glink_ucsi_async_write(struct ucsi *__ucsi, unsigned int offset, + const void *val, size_t val_len) +{ + struct pmic_glink_ucsi *ucsi = ucsi_get_drvdata(__ucsi); + int ret; + + mutex_lock(&ucsi->lock); + ret = pmic_glink_ucsi_locked_write(ucsi, offset, val, val_len); + mutex_unlock(&ucsi->lock); + + return ret; +} + +static int pmic_glink_ucsi_sync_write(struct ucsi *__ucsi, unsigned int offset, + const void *val, size_t val_len) +{ + struct pmic_glink_ucsi *ucsi = ucsi_get_drvdata(__ucsi); + unsigned long left; + u64 command; + int ret; + + /* TOFIX: Downstream forces recipient to CON when UCSI_GET_ALTERNATE_MODES command */ + + mutex_lock(&ucsi->lock); + ucsi->sync_val = 0; + reinit_completion(&ucsi->sync_ack); + ucsi->sync_pending = true; + ret = pmic_glink_ucsi_locked_write(ucsi, offset, val, val_len); + mutex_unlock(&ucsi->lock); + + left = wait_for_completion_timeout(&ucsi->sync_ack, 5 * HZ); + if (!left) { + dev_err(ucsi->dev, "timeout waiting for UCSI sync write response\n"); + ret = -ETIMEDOUT; + } else if (ucsi->sync_val) { + dev_err(ucsi->dev, "sync write returned: %d\n", ucsi->sync_val); + } + + ucsi->sync_pending = false; + + return ret; +} + +static const struct ucsi_operations pmic_glink_ucsi_ops = { + .read = pmic_glink_ucsi_read, + .sync_write = pmic_glink_ucsi_sync_write, + .async_write = pmic_glink_ucsi_async_write +}; + +static void pmic_glink_ucsi_read_ack(struct pmic_glink_ucsi *ucsi, const void *data, int len) +{ + const struct ucsi_read_buf_resp_msg *resp = data; + + if (resp->ret_code) + return; + + memcpy(ucsi->read_buf, resp->buf, UCSI_BUF_SIZE); + complete(&ucsi->read_ack); +} + +static void pmic_glink_ucsi_write_ack(struct pmic_glink_ucsi *ucsi, const void *data, int len) +{ + const struct ucsi_write_buf_resp_msg *resp = data; + + if (resp->ret_code) + return; + + ucsi->sync_val = resp->ret_code; + complete(&ucsi->write_ack); +} + +static void pmic_glink_ucsi_notify(struct work_struct *work) +{ + struct pmic_glink_ucsi *ucsi = container_of(work, struct pmic_glink_ucsi, notify_work); + unsigned int con_num; + u32 cci; + int ret; + + ret = pmic_glink_ucsi_read(ucsi->ucsi, UCSI_CCI, &cci, sizeof(cci)); + if (ret) { + dev_err(ucsi->dev, "failed to read CCI on notification\n"); + return; + } + + con_num = UCSI_CCI_CONNECTOR(cci); + if (con_num) + ucsi_connector_change(ucsi->ucsi, con_num); + + if (ucsi->sync_pending && cci & UCSI_CCI_BUSY) { + ucsi->sync_val = -EBUSY; + complete(&ucsi->sync_ack); + } else if (ucsi->sync_pending && + (cci & (UCSI_CCI_ACK_COMPLETE | UCSI_CCI_COMMAND_COMPLETE))) { + complete(&ucsi->sync_ack); + } +} + +static void pmic_glink_ucsi_register(struct work_struct *work) +{ + struct pmic_glink_ucsi *ucsi = container_of(work, struct pmic_glink_ucsi, register_work); + + ucsi_register(ucsi->ucsi); +} + +static void pmic_glink_ucsi_callback(const void *data, size_t len, void *priv) +{ + struct pmic_glink_ucsi *ucsi = priv; + const struct pmic_glink_hdr *hdr = data; + + switch (hdr->opcode) { + case UC_UCSI_READ_BUF_REQ: + pmic_glink_ucsi_read_ack(ucsi, data, len); + break; + case UC_UCSI_WRITE_BUF_REQ: + pmic_glink_ucsi_write_ack(ucsi, data, len); + break; + case UC_UCSI_USBC_NOTIFY_IND: + schedule_work(&ucsi->notify_work); + break; + }; +} + +static void pmic_glink_ucsi_pdr_notify(void *priv, int state) +{ + struct pmic_glink_ucsi *ucsi = priv; + + if (state == SERVREG_SERVICE_STATE_UP) + schedule_work(&ucsi->register_work); + else if (state == SERVREG_SERVICE_STATE_DOWN) + ucsi_unregister(ucsi->ucsi); +} + +static int pmic_glink_ucsi_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct pmic_glink_ucsi *ucsi; + struct device *dev = &adev->dev; + + ucsi = devm_kzalloc(dev, sizeof(*ucsi), GFP_KERNEL); + if (!ucsi) + return -ENOMEM; + + ucsi->dev = dev; + dev_set_drvdata(dev, ucsi); + + INIT_WORK(&ucsi->notify_work, pmic_glink_ucsi_notify); + INIT_WORK(&ucsi->register_work, pmic_glink_ucsi_register); + init_completion(&ucsi->read_ack); + init_completion(&ucsi->write_ack); + init_completion(&ucsi->sync_ack); + mutex_init(&ucsi->lock); + + ucsi->ucsi = ucsi_create(dev, &pmic_glink_ucsi_ops); + if (IS_ERR(ucsi->ucsi)) + return PTR_ERR(ucsi->ucsi); + + ucsi_set_drvdata(ucsi->ucsi, ucsi); + + ucsi->client = devm_pmic_glink_register_client(dev, + PMIC_GLINK_OWNER_USBC, + pmic_glink_ucsi_callback, + pmic_glink_ucsi_pdr_notify, + ucsi); + return PTR_ERR_OR_ZERO(ucsi->client); +} + +static const struct auxiliary_device_id pmic_glink_ucsi_id_table[] = { + { .name = "pmic_glink.ucsi", }, + {}, +}; +MODULE_DEVICE_TABLE(auxiliary, pmic_glink_ucsi_id_table); + +static struct auxiliary_driver pmic_glink_ucsi_driver = { + .name = "pmic_glink_ucsi", + .probe = pmic_glink_ucsi_probe, + .id_table = pmic_glink_ucsi_id_table, +}; + +module_auxiliary_driver(pmic_glink_ucsi_driver); + +MODULE_DESCRIPTION("Qualcomm PMIC GLINK UCSI driver"); +MODULE_LICENSE("GPL");
Introduce the UCSI PMIC Glink aux driver that communicates with the aDSP firmware with the UCSI protocol which handles the USB-C Port(s) Power Delivery. The UCSI messaging is necessary on newer Qualcomm SoCs to provide USB role switch and altmode notifications. Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> --- drivers/usb/typec/ucsi/Kconfig | 7 + drivers/usb/typec/ucsi/Makefile | 1 + drivers/usb/typec/ucsi/ucsi_glink.c | 321 ++++++++++++++++++++++++++++++++++++ 3 files changed, 329 insertions(+)