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Date: Wed, 2 Feb 2022 11:13:46 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: ChiYuan Huang <u0084500@...il.com>
Cc: Rob Herring <robh+dt@...nel.org>,
Greg KH <gregkh@...uxfoundation.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
Linux USB List <linux-usb@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>,
cy_huang <cy_huang@...htek.com>
Subject: Re: [PATCH v2 2/2] usb: typec: rt1719: Add support for Richtek RT1719
On Tue, Feb 01, 2022 at 11:27:38PM +0800, ChiYuan Huang wrote:
> Heikki Krogerus <heikki.krogerus@...ux.intel.com> 於 2022年1月31日 週一 下午6:01寫道：
> > On Sat, Jan 15, 2022 at 08:56:31AM +0800, cy_huang wrote:
> > > From: ChiYuan Huang <cy_huang@...htek.com>
> > >
> > > Richtek RT1719 is a sink-only Type-C PD controller it complies with
> > > latest USB Type-C and PD standards. It integrates the physical layer of
> > > USB power delivery protocol to allow up to 100W of power.
> > >
> > > Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
> >
> > This looked OK to me, but one nitpick. Don't return ENOTSUPP, use
> > EOPNOTSUPP instead.
> >
> OK. I.ll use EOPNOTSUPP to replace all ENOTSUPPs.
Related to this, before you resend, there is still one thing that I
think needs clarification below...
I also found something else that you could improve.
> > I'm pretty sure that scripts/checkpatch.pl will also tell you to do
> > so, so please run that script and fix all the errors and warnings that
> > it finds while at it.
> >
> > thanks,
> >
> Yap, Thanks. I also find there's still one consistent space error need
> to be fixed.
> Ack in next.
> > > ---
> > > drivers/usb/typec/Kconfig | 12 +
> > > drivers/usb/typec/Makefile | 1 +
> > > drivers/usb/typec/rt1719.c | 976 +++++++++++++++++++++++++++++++++++++++++++++
> > > 3 files changed, 989 insertions(+)
> > > create mode 100644 drivers/usb/typec/rt1719.c
> > >
> > > diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
> > > index ab480f3..bc918ca 100644
> > > --- a/drivers/usb/typec/Kconfig
> > > +++ b/drivers/usb/typec/Kconfig
> > > @@ -52,6 +52,18 @@ source "drivers/usb/typec/ucsi/Kconfig"
> > >
> > > source "drivers/usb/typec/tipd/Kconfig"
> > >
> > > +config TYPEC_RT1719
> > > + tristate "Richtek RT1719 Sink Only Type-C controller driver"
> > > + depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
> > > + depends on I2C
> > > + select REGMAP_I2C
> > > + help
> > > + Say Y or M here if your system has Richtek RT1719 sink only
> > > + Type-C port controller driver.
> > > +
> > > + If you choose to build this driver as a dynamically linked module, the
> > > + module will be called rt1719.ko
> > > +
> > > config TYPEC_HD3SS3220
> > > tristate "TI HD3SS3220 Type-C DRP Port controller driver"
> > > depends on I2C
> > > diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
> > > index 57870a2..441dd6c 100644
> > > --- a/drivers/usb/typec/Makefile
> > > +++ b/drivers/usb/typec/Makefile
> > > @@ -9,4 +9,5 @@ obj-$(CONFIG_TYPEC_TPS6598X) += tipd/
> > > obj-$(CONFIG_TYPEC_HD3SS3220) += hd3ss3220.o
> > > obj-$(CONFIG_TYPEC_QCOM_PMIC) += qcom-pmic-typec.o
> > > obj-$(CONFIG_TYPEC_STUSB160X) += stusb160x.o
> > > +obj-$(CONFIG_TYPEC_RT1719) += rt1719.o
> > > obj-$(CONFIG_TYPEC) += mux/
> > > diff --git a/drivers/usb/typec/rt1719.c b/drivers/usb/typec/rt1719.c
> > > new file mode 100644
> > > index 00000000..9da65ee
> > > --- /dev/null
> > > +++ b/drivers/usb/typec/rt1719.c
> > > @@ -0,0 +1,976 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +
> > > +#include <linux/bitfield.h>
> > > +#include <linux/completion.h>
> > > +#include <linux/i2c.h>
> > > +#include <linux/interrupt.h>
> > > +#include <linux/kernel.h>
> > > +#include <linux/module.h>
> > > +#include <linux/power_supply.h>
> > > +#include <linux/regmap.h>
> > > +#include <linux/usb/pd.h>
> > > +#include <linux/usb/role.h>
> > > +#include <linux/usb/typec.h>
> > > +
> > > +#define RT1719_REG_TXCTRL1 0x03
> > > +#define RT1719_REG_TXCTRL2 0x04
> > > +#define RT1719_REG_POLICYINFO 0x0E
> > > +#define RT1719_REG_SRCPDO1 0x11
> > > +#define RT1719_REG_MASKS 0x2D
> > > +#define RT1719_REG_EVENTS 0x33
> > > +#define RT1719_REG_STATS 0x37
> > > +#define RT1719_REG_PSELINFO 0x3C
> > > +#define RT1719_REG_USBSETINFO 0x3E
> > > +#define RT1719_REG_VENID 0x82
> > > +
> > > +#define RT1719_UNIQUE_PID 0x1719
> > > +#define RT1719_REQDRSWAP_MASK BIT(7)
> > > +#define RT1719_EVALMODE_MASK BIT(4)
> > > +#define RT1719_REQSRCPDO_MASK GENMASK(2, 0)
> > > +#define RT1719_TXSPDOREQ_MASK BIT(7)
> > > +#define RT1719_INT_DRSW_ACCEPT BIT(23)
> > > +#define RT1719_INT_RX_SRCCAP BIT(21)
> > > +#define RT1719_INT_VBUS_DCT BIT(6)
> > > +#define RT1719_INT_VBUS_PRESENT BIT(5)
> > > +#define RT1719_INT_PE_SNK_RDY BIT(2)
> > > +#define RT1719_CC1_STAT GENMASK(9, 8)
> > > +#define RT1719_CC2_STAT GENMASK(11, 10)
> > > +#define RT1719_POLARITY_MASK BIT(23)
> > > +#define RT1719_DATAROLE_MASK BIT(22)
> > > +#define RT1719_PDSPECREV_MASK GENMASK(21, 20)
> > > +#define RT1719_SPDOSEL_MASK GENMASK(18, 16)
> > > +#define RT1719_SPDONUM_MASK GENMASK(15, 13)
> > > +#define RT1719_ATTACH_VBUS BIT(12)
> > > +#define RT1719_ATTACH_DBG BIT(10)
> > > +#define RT1719_ATTACH_SNK BIT(9)
> > > +#define RT1719_ATTACHDEV_MASK (RT1719_ATTACH_VBUS | RT1719_ATTACH_DBG | \
> > > + RT1719_ATTACH_SNK)
> > > +#define RT1719_PE_EXP_CONTRACT BIT(2)
> > > +#define RT1719_PSEL_SUPPORT BIT(15)
> > > +#define RT1719_TBLSEL_MASK BIT(6)
> > > +#define RT1719_LATPSEL_MASK GENMASK(5, 0)
> > > +#define RT1719_USBINFO_MASK GENMASK(1, 0)
> > > +#define RT1719_USB_DFPUFP 3
> > > +#define RT1719_MAX_SRCPDO 7
> > > +
> > > +enum {
> > > + SNK_PWR_OPEN = 0,
> > > + SNK_PWR_DEF,
> > > + SNK_PWR_1P5A,
> > > + SNK_PWR_3A
> > > +};
> > > +
> > > +enum {
> > > + USBPD_SPECREV_1_0 = 0,
> > > + USBPD_SPECREV_2_0,
> > > + USBPD_SPECREV_3_0
> > > +};
> > > +
> > > +enum rt1719_snkcap {
> > > + RT1719_SNKCAP_5V = 0,
> > > + RT1719_SNKCAP_9V,
> > > + RT1719_SNKCAP_12V,
> > > + RT1719_SNKCAP_15V,
> > > + RT1719_SNKCAP_20V,
> > > + RT1719_MAX_SNKCAP
> > > +};
> > > +
> > > +struct rt1719_psel_cap {
> > > + u8 lomask;
> > > + u8 himask;
> > > + u32 milliwatt;
> > > + u32 milliamp;
> > > +};
> > > +
> > > +struct rt1719_data {
> > > + struct device *dev;
> > > + struct regmap *regmap;
> > > + struct typec_port *port;
> > > + struct usb_role_switch *role_sw;
> > > + struct power_supply *psy;
> > > + struct typec_partner *partner;
> > > + struct power_supply_desc psy_desc;
> > > + struct usb_pd_identity partner_ident;
> > > + struct typec_partner_desc partner_desc;
> > > + struct completion req_completion;
> > > + enum power_supply_usb_type usb_type;
> > > + bool attached;
> > > + bool pd_capable;
> > > + bool drswap_support;
> > > + u32 voltage;
> > > + u32 req_voltage;
> > > + u32 max_current;
> > > + u32 op_current;
> > > + u32 spdos[RT1719_MAX_SRCPDO];
> > > + u16 snkcaps[RT1719_MAX_SNKCAP];
> > > + int spdo_num;
> > > + int spdo_sel;
> > > + u32 conn_info;
> > > + u16 conn_stat;
> > > +};
> > > +
> > > +static const enum power_supply_usb_type rt1719_psy_usb_types[] = {
> > > + POWER_SUPPLY_USB_TYPE_C,
> > > + POWER_SUPPLY_USB_TYPE_PD,
> > > + POWER_SUPPLY_USB_TYPE_PD_PPS
> > > +};
> > > +
> > > +static const enum power_supply_property rt1719_psy_properties[] = {
> > > + POWER_SUPPLY_PROP_ONLINE,
> > > + POWER_SUPPLY_PROP_USB_TYPE,
> > > + POWER_SUPPLY_PROP_VOLTAGE_NOW,
> > > + POWER_SUPPLY_PROP_CURRENT_MAX,
> > > + POWER_SUPPLY_PROP_CURRENT_NOW
> > > +};
> > > +
> > > +static int rt1719_read16(struct rt1719_data *data, unsigned int reg, u16 *val)
> > > +{
> > > + __le16 regval;
> > > + int ret;
> > > +
> > > + ret = regmap_raw_read(data->regmap, reg, ®val, sizeof(regval));
> > > + if (ret)
> > > + return ret;
> > > +
> > > + *val = le16_to_cpu(regval);
> > > + return 0;
> > > +}
> > > +
> > > +static int rt1719_read32(struct rt1719_data *data, unsigned int reg, u32 *val)
> > > +{
> > > + __le32 regval;
> > > + int ret;
> > > +
> > > + ret = regmap_raw_read(data->regmap, reg, ®val, sizeof(regval));
> > > + if (ret)
> > > + return ret;
> > > +
> > > + *val = le32_to_cpu(regval);
> > > + return 0;
> > > +}
> > > +
> > > +static int rt1719_write32(struct rt1719_data *data, unsigned int reg, u32 val)
> > > +{
> > > + __le32 regval = cpu_to_le32(val);
> > > +
> > > + return regmap_raw_write(data->regmap, reg, ®val, sizeof(regval));
> > > +}
> > > +
> > > +static enum typec_pwr_opmode rt1719_get_pwr_opmode(u32 conn, u16 stat)
> > > +{
> > > + u16 cc1, cc2, cc_stat;
> > > +
> > > + cc1 = FIELD_GET(RT1719_CC1_STAT, stat);
> > > + cc2 = FIELD_GET(RT1719_CC2_STAT, stat);
> > > +
> > > + if (conn & RT1719_ATTACH_SNK) {
> > > + if (conn & RT1719_POLARITY_MASK)
> > > + cc_stat = cc2;
> > > + else
> > > + cc_stat = cc1;
> > > +
> > > + switch (cc_stat) {
> > > + case SNK_PWR_3A:
> > > + return TYPEC_PWR_MODE_3_0A;
> > > + case SNK_PWR_1P5A:
> > > + return TYPEC_PWR_MODE_1_5A;
> > > + }
> > > + } else if (conn & RT1719_ATTACH_DBG) {
> > > + if ((cc1 == SNK_PWR_1P5A && cc2 == SNK_PWR_DEF) ||
> > > + (cc1 == SNK_PWR_DEF && cc2 == SNK_PWR_1P5A))
> > > + return TYPEC_PWR_MODE_1_5A;
> > > + else if ((cc1 == SNK_PWR_3A && cc2 == SNK_PWR_DEF) ||
> > > + (cc1 == SNK_PWR_DEF && cc2 == SNK_PWR_3A))
> > > + return TYPEC_PWR_MODE_3_0A;
> > > + }
> > > +
> > > + return TYPEC_PWR_MODE_USB;
> > > +}
> > > +
> > > +static enum typec_data_role rt1719_get_data_role(u32 conn)
> > > +{
> > > + if (conn & RT1719_DATAROLE_MASK)
> > > + return TYPEC_HOST;
> > > + return TYPEC_DEVICE;
> > > +}
> > > +
> > > +static void rt1719_set_data_role(struct rt1719_data *data,
> > > + enum typec_data_role data_role,
> > > + bool attached)
> > > +{
> > > + enum usb_role usb_role = USB_ROLE_NONE;
> > > +
> > > + if (attached) {
> > > + if (data_role == TYPEC_HOST)
> > > + usb_role = USB_ROLE_HOST;
> > > + else
> > > + usb_role = USB_ROLE_DEVICE;
> > > + }
> > > +
> > > + usb_role_switch_set_role(data->role_sw, usb_role);
> > > + typec_set_data_role(data->port, data_role);
> > > +}
> > > +
> > > +static void rt1719_update_data_role(struct rt1719_data *data)
> > > +{
> > > + if (!data->attached)
> > > + return;
> > > +
> > > + rt1719_set_data_role(data, rt1719_get_data_role(data->conn_info), true);
> > > +}
> > > +
> > > +static void rt1719_register_partner(struct rt1719_data *data)
> > > +{
> > > + u16 spec_rev = 0;
> > > +
> > > + if (data->pd_capable) {
> > > + u32 rev;
> > > +
> > > + rev = FIELD_GET(RT1719_PDSPECREV_MASK, data->conn_info);
> > > + switch (rev) {
> > > + case USBPD_SPECREV_3_0:
> > > + spec_rev = 0x0300;
> > > + break;
> > > + case USBPD_SPECREV_2_0:
> > > + spec_rev = 0x0200;
> > > + break;
> > > + default:
> > > + spec_rev = 0x0100;
> > > + break;
> > > + }
> > > + }
> > > +
> > > + /* Just to prevent multiple times attach */
> > > + if (data->partner)
> > > + typec_unregister_partner(data->partner);
> > > +
> > > + memset(&data->partner_ident, 0, sizeof(data->partner_ident));
> > > + data->partner_desc.usb_pd = data->pd_capable;
> > > + data->partner_desc.pd_revision = spec_rev;
> > > +
> > > + if (data->conn_info & RT1719_ATTACH_DBG)
> > > + data->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
> > > + else
> > > + data->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
> > > +
> > > + data->partner = typec_register_partner(data->port, &data->partner_desc);
> > > +}
> > > +
> > > +static void rt1719_attach(struct rt1719_data *data)
> > > +{
> > > + enum typec_pwr_opmode pwr_opmode;
> > > + enum typec_data_role data_role;
> > > + u32 volt = 5000, curr = 500;
> > > +
> > > + if (!(data->conn_info & RT1719_ATTACHDEV_MASK))
> > > + return;
> > > +
> > > + pwr_opmode = rt1719_get_pwr_opmode(data->conn_info, data->conn_stat);
> > > + data_role = rt1719_get_data_role(data->conn_info);
> > > +
> > > + typec_set_pwr_opmode(data->port, pwr_opmode);
> > > + rt1719_set_data_role(data, data_role, true);
> > > +
> > > + if (data->conn_info & RT1719_ATTACH_SNK)
> > > + rt1719_register_partner(data);
> > > +
> > > + if (pwr_opmode == TYPEC_PWR_MODE_3_0A)
> > > + curr = 3000;
> > > + else if (pwr_opmode == TYPEC_PWR_MODE_1_5A)
> > > + curr = 1500;
> > > +
> > > + data->voltage = volt * 1000;
> > > + data->max_current = data->op_current = curr * 1000;
> > > + data->attached = true;
> > > +
> > > + power_supply_changed(data->psy);
> > > +}
> > > +
> > > +static void rt1719_detach(struct rt1719_data *data)
> > > +{
> > > + if (!data->attached || (data->conn_info & RT1719_ATTACHDEV_MASK))
> > > + return;
> > > +
> > > + typec_unregister_partner(data->partner);
> > > + data->partner = NULL;
> > > +
> > > + typec_set_pwr_opmode(data->port, TYPEC_PWR_MODE_USB);
> > > + rt1719_set_data_role(data, TYPEC_DEVICE, false);
> > > +
> > > + memset32(data->spdos, 0, RT1719_MAX_SRCPDO);
> > > + data->spdo_num = 0;
> > > + data->voltage = data->max_current = data->op_current = 0;
> > > + data->attached = data->pd_capable = false;
> > > +
> > > + data->usb_type = POWER_SUPPLY_USB_TYPE_C;
> > > +
> > > + power_supply_changed(data->psy);
> > > +}
> > > +
> > > +static void rt1719_update_operating_status(struct rt1719_data *data)
> > > +{
> > > + enum power_supply_usb_type usb_type = POWER_SUPPLY_USB_TYPE_PD;
> > > + u32 voltage, max_current, op_current;
> > > + int i, snk_sel;
> > > +
> > > + for (i = 0; i < data->spdo_num; i++) {
> > > + u32 pdo = data->spdos[i];
> > > + enum pd_pdo_type type = pdo_type(pdo);
> > > +
> > > + if (type == PDO_TYPE_APDO) {
> > > + usb_type = POWER_SUPPLY_USB_TYPE_PD_PPS;
> > > + break;
> > > + }
> > > + }
> > > +
> > > + data->spdo_sel = FIELD_GET(RT1719_SPDOSEL_MASK, data->conn_info);
> > > + if (data->spdo_sel <= 0)
> > > + return;
> > > +
> > > + data->usb_type = usb_type;
> > > +
> > > + voltage = pdo_fixed_voltage(data->spdos[data->spdo_sel -1]);
> > > + max_current = pdo_max_current(data->spdos[data->spdo_sel - 1]);
> > > +
> > > + switch (voltage) {
> > > + case 5000:
> > > + snk_sel = RT1719_SNKCAP_5V;
> > > + break;
> > > + case 9000:
> > > + snk_sel = RT1719_SNKCAP_9V;
> > > + break;
> > > + case 12000:
> > > + snk_sel = RT1719_SNKCAP_12V;
> > > + break;
> > > + case 15000:
> > > + snk_sel = RT1719_SNKCAP_15V;
> > > + break;
> > > + case 20000:
> > > + snk_sel = RT1719_SNKCAP_20V;
> > > + break;
> > > + default:
> > > + return;
> > > + }
> > > +
> > > + op_current = min(max_current, pdo_max_current(data->snkcaps[snk_sel]));
> > > +
> > > + /* covert mV/mA to uV/uA */
> > > + data->voltage = voltage * 1000;
> > > + data->max_current = max_current * 1000;
> > > + data->op_current = op_current * 1000;
> > > +
> > > + power_supply_changed(data->psy);
> > > +}
> > > +
> > > +static void rt1719_update_pwr_opmode(struct rt1719_data *data)
> > > +{
> > > + if (!data->attached)
> > > + return;
> > > +
> > > + if (!data->pd_capable) {
> > > + data->pd_capable = true;
> > > +
> > > + typec_set_pwr_opmode(data->port, TYPEC_PWR_MODE_PD);
> > > + rt1719_register_partner(data);
> > > + }
> > > +
> > > + rt1719_update_operating_status(data);
> > > +}
> > > +
> > > +static void rt1719_update_source_pdos(struct rt1719_data *data)
> > > +{
> > > + int spdo_num = FIELD_GET(RT1719_SPDONUM_MASK, data->conn_info);
> > > + __le32 src_pdos[RT1719_MAX_SRCPDO] = { };
> > > + int i, ret;
> > > +
> > > + if (!data->attached)
> > > + return;
> > > +
> > > + ret = regmap_raw_read(data->regmap, RT1719_REG_SRCPDO1, src_pdos,
> > > + sizeof(__le32) * spdo_num);
> > > + if (ret)
> > > + return;
> > > +
> > > + data->spdo_num = spdo_num;
> > > + for (i = 0; i < spdo_num; i++)
> > > + data->spdos[i] = le32_to_cpu(src_pdos[i]);
> > > +}
> > > +
> > > +static int rt1719_dr_set(struct typec_port *port, enum typec_data_role role)
> > > +{
> > > + struct rt1719_data *data = typec_get_drvdata(port);
> > > + enum typec_data_role cur_role;
> > > + int ret;
> > > +
> > > + if (!data->attached || !data->pd_capable || !data->drswap_support)
> > > + return -EINVAL;
> > > +
> > > + if (data->spdo_num > 0 && !(data->spdos[0] & PDO_FIXED_DATA_SWAP))
> > > + return -EINVAL;
> > > +
> > > + cur_role = rt1719_get_data_role(data->conn_info);
> > > + if (cur_role == role)
> > > + return 0;
> > > +
> > > + ret = regmap_update_bits(data->regmap, RT1719_REG_TXCTRL1,
> > > + RT1719_REQDRSWAP_MASK, RT1719_REQDRSWAP_MASK);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + reinit_completion(&data->req_completion);
> > > + ret = wait_for_completion_timeout(&data->req_completion,
> > > + msecs_to_jiffies(400));
> > > + if (ret == 0)
> > > + return -ETIMEDOUT;
> > > +
> > > + cur_role = rt1719_get_data_role(data->conn_info);
> > > + if (cur_role != role)
> > > + return -ENOTSUPP;
In this case the operation just failed, right? If so, then you should
not claim that the operation is not supported. You need to return some
other, more appropriate error code in that case.
And, in case drswap_support or pd_capable flag is not set, then you
actually should return -EOPNOTSUPP, right?
> > > + rt1719_set_data_role(data, role, true);
> > > + return 0;
> > > +}
> > > +
> > > +static const struct typec_operations rt1719_port_ops = {
> > > + .dr_set = rt1719_dr_set,
> > > +};
> > > +
> > > +static int rt1719_usbpd_request_voltage(struct rt1719_data *data)
> > > +{
> > > + u32 src_voltage;
> > > + int snk_sel, src_sel = -1;
> > > + int i, ret;
> > > +
> > > + if (!data->attached || !data->pd_capable || data->spdo_sel <= 0)
> > > + return -EINVAL;
> > > +
> > > + src_voltage = pdo_fixed_voltage(data->spdos[data->spdo_sel - 1]);
> > > + if (src_voltage == data->req_voltage)
> > > + return 0;
> > > +
> > > + switch (data->req_voltage) {
> > > + case 5000:
> > > + snk_sel = RT1719_SNKCAP_5V;
> > > + break;
> > > + case 9000:
> > > + snk_sel = RT1719_SNKCAP_9V;
> > > + break;
> > > + case 12000:
> > > + snk_sel = RT1719_SNKCAP_12V;
> > > + break;
> > > + case 15000:
> > > + snk_sel = RT1719_SNKCAP_15V;
> > > + break;
> > > + case 20000:
> > > + snk_sel = RT1719_SNKCAP_20V;
> > > + break;
> > > + default:
> > > + return -EINVAL;
> > > + }
> > > +
> > > + if (!(data->snkcaps[snk_sel] & RT1719_PSEL_SUPPORT))
> > > + return -EINVAL;
> > > +
> > > + for (i = 0; i < data->spdo_num; i++) {
> > > + enum pd_pdo_type type = pdo_type(data->spdos[i]);
> > > +
> > > + if (type != PDO_TYPE_FIXED)
> > > + continue;
> > > +
> > > + src_voltage = pdo_fixed_voltage(data->spdos[i]);
> > > + if (src_voltage == data->req_voltage) {
> > > + src_sel = i;
> > > + break;
> > > + }
> > > + }
> > > +
> > > + if (src_sel == -1)
> > > + return -ENOTSUPP;
> > > +
> > > + ret = regmap_update_bits(data->regmap, RT1719_REG_TXCTRL1,
> > > + RT1719_EVALMODE_MASK | RT1719_REQSRCPDO_MASK,
> > > + RT1719_EVALMODE_MASK | (src_sel + 1));
> > > + ret |= regmap_update_bits(data->regmap, RT1719_REG_TXCTRL2,
> > > + RT1719_TXSPDOREQ_MASK, RT1719_TXSPDOREQ_MASK);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + reinit_completion(&data->req_completion);
> > > + ret = wait_for_completion_timeout(&data->req_completion,
> > > + msecs_to_jiffies(400));
> > > + if (!ret)
> > > + return -ETIMEDOUT;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int rt1719_psy_set_property(struct power_supply *psy,
> > > + enum power_supply_property psp,
> > > + const union power_supply_propval *val)
> > > +{
> > > + struct rt1719_data *data = power_supply_get_drvdata(psy);
> > > + int ret = -ENOTSUPP;
I'm actually not sure that claiming that the operation is not
supported here is the correct error either... What do the other
drivers return in this case?
> > > + if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW) {
> > > + data->req_voltage = val->intval / 1000;
> > > + ret = rt1719_usbpd_request_voltage(data);
> > > + }
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int rt1719_psy_get_property(struct power_supply *psy,
> > > + enum power_supply_property psp,
> > > + union power_supply_propval *val)
> > > +{
> > > + struct rt1719_data *data = power_supply_get_drvdata(psy);
> > > + int ret = 0;
> > > +
> > > + switch (psp) {
> > > + case POWER_SUPPLY_PROP_ONLINE:
> > > + val->intval = data->attached ? 1 : 0;
> > > + break;
> > > + case POWER_SUPPLY_PROP_USB_TYPE:
> > > + val->intval = data->usb_type;
> > > + break;
> > > + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
> > > + val->intval = data->voltage;
> > > + break;
> > > + case POWER_SUPPLY_PROP_CURRENT_MAX:
> > > + val->intval = data->max_current;
> > > + break;
> > > + case POWER_SUPPLY_PROP_CURRENT_NOW:
> > > + val->intval = data->op_current;
> > > + break;
> > > + default:
> > > + ret = -EINVAL;
> > > + break;
> > > + }
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int rt1719_psy_property_is_writeable(struct power_supply *psy,
> > > + enum power_supply_property psp)
> > > +{
> > > + if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW)
> > > + return 1;
> > > + return 0;
> > > +}
> > > +
> > > +static int devm_rt1719_psy_register(struct rt1719_data *data)
> > > +{
> > > + static const char *rt1719_psy_name_prefix = "rt1719-source-psy-";
> > > + const char *port_dev_name = dev_name(data->dev);
> > > + struct power_supply_config psy_cfg = { };
> > > + size_t psy_name_len = strlen(rt1719_psy_name_prefix) +
> > > + strlen(port_dev_name) + 1;
> > > + char *psy_name;
> > > +
> > > + psy_cfg.fwnode = dev_fwnode(data->dev);
> > > + psy_cfg.drv_data = data;
> > > +
> > > + psy_name = devm_kzalloc(data->dev, psy_name_len, GFP_KERNEL);
> > > + if (!psy_name)
> > > + return -ENOMEM;
> > > +
> > > + snprintf(psy_name, psy_name_len, "%s%s", rt1719_psy_name_prefix,
> > > + port_dev_name);
psy_name = devm_kasprintf(data->dev, GFP_KERNEL, "rt1719-source-psy-%s",
dev_name(data->dev));
if (!psy_name)
return -ENOMEM;
> > > + data->psy_desc.name = psy_name;
> > > + data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
> > > + data->psy_desc.usb_types = rt1719_psy_usb_types;
> > > + data->psy_desc.num_usb_types = ARRAY_SIZE(rt1719_psy_usb_types);
> > > + data->psy_desc.properties = rt1719_psy_properties;
> > > + data->psy_desc.num_properties = ARRAY_SIZE(rt1719_psy_properties);
> > > + data->psy_desc.get_property = rt1719_psy_get_property;
> > > + data->psy_desc.set_property = rt1719_psy_set_property;
> > > + data->psy_desc.property_is_writeable = rt1719_psy_property_is_writeable;
> > > +
> > > + data->usb_type = POWER_SUPPLY_USB_TYPE_C;
> > > +
> > > + data->psy = devm_power_supply_register(data->dev, &data->psy_desc,
> > > + &psy_cfg);
> > > +
> > > + return PTR_ERR_OR_ZERO(data->psy);
> > > +}
> > > +
> > > +static irqreturn_t rt1719_irq_handler(int irq, void *priv)
> > > +{
> > > + struct rt1719_data *data = priv;
> > > + u32 events, conn_info;
> > > + u16 conn_stat;
> > > + int ret;
> > > +
> > > + ret = rt1719_read32(data, RT1719_REG_EVENTS, &events);
> > > + ret |= rt1719_read32(data, RT1719_REG_POLICYINFO, &conn_info);
> > > + ret |= rt1719_read16(data, RT1719_REG_STATS, &conn_stat);
> > > + if (ret)
> > > + return IRQ_NONE;
> > > +
> > > + data->conn_info = conn_info;
> > > + data->conn_stat = conn_stat;
> > > +
> > > + events &= (RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
> > > + RT1719_INT_VBUS_PRESENT | RT1719_INT_VBUS_DCT |
> > > + RT1719_INT_PE_SNK_RDY);
> > > +
> > > + if (events & RT1719_INT_DRSW_ACCEPT)
> > > + rt1719_update_data_role(data);
> > > +
> > > + if (events & RT1719_INT_VBUS_PRESENT)
> > > + rt1719_attach(data);
> > > +
> > > + if (events & RT1719_INT_VBUS_DCT)
> > > + rt1719_detach(data);
> > > +
> > > + if (events & RT1719_INT_RX_SRCCAP)
> > > + rt1719_update_source_pdos(data);
> > > +
> > > + if (events & RT1719_INT_PE_SNK_RDY) {
> > > + complete(&data->req_completion);
> > > + rt1719_update_pwr_opmode(data);
> > > + }
> > > +
> > > + /* Write 1 to clear already handled events */
> > > + rt1719_write32(data, RT1719_REG_EVENTS, events);
> > > +
> > > + return IRQ_HANDLED;
> > > +}
> > > +
> > > +static int rt1719_irq_init(struct rt1719_data *data)
> > > +{
> > > + struct i2c_client *i2c = to_i2c_client(data->dev);
> > > + u32 irq_enable;
> > > + int ret;
> > > +
> > > + irq_enable = RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
> > > + RT1719_INT_VBUS_DCT | RT1719_INT_VBUS_PRESENT |
> > > + RT1719_INT_PE_SNK_RDY;
> > > +
> > > + ret = rt1719_write32(data, RT1719_REG_MASKS, irq_enable);
> > > + if (ret) {
> > > + dev_err(&i2c->dev, "Failed to config irq enable\n");
> > > + return ret;
> > > + }
> > > +
> > > + return devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
> > > + rt1719_irq_handler, IRQF_ONESHOT,
> > > + dev_name(&i2c->dev), data);
> > > +}
> > > +
> > > +static int rt1719_init_attach_state(struct rt1719_data *data)
> > > +{
> > > + u32 conn_info, irq_clear;
> > > + u16 conn_stat;
> > > + int ret;
> > > +
> > > + irq_clear = RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
> > > + RT1719_INT_VBUS_DCT | RT1719_INT_VBUS_PRESENT |
> > > + RT1719_INT_PE_SNK_RDY;
> > > +
> > > + ret = rt1719_read32(data, RT1719_REG_POLICYINFO, &conn_info);
> > > + ret |= rt1719_read16(data, RT1719_REG_STATS, &conn_stat);
> > > + ret |= rt1719_write32(data, RT1719_REG_EVENTS, irq_clear);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + data->conn_info = conn_info;
> > > + data->conn_stat = conn_stat;
> > > +
> > > + if (conn_info & RT1719_ATTACHDEV_MASK)
> > > + rt1719_attach(data);
> > > +
> > > + if (conn_info & RT1719_PE_EXP_CONTRACT) {
> > > + rt1719_update_source_pdos(data);
> > > + rt1719_update_pwr_opmode(data);
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +#define RT1719_PSEL_CAPINFO(_lomask, _milliwatt, _himask, _milliamp) { \
> > > + .lomask = _lomask, \
> > > + .milliwatt = _milliwatt, \
> > > + .himask = _himask, \
> > > + .milliamp = _milliamp, \
> > > +}
> > > +
> > > +static const struct rt1719_psel_cap rt1719_psel_caps[] = {
> > > + RT1719_PSEL_CAPINFO(0x18, 75000, 0x10, 5000),
> > > + RT1719_PSEL_CAPINFO(0x18, 60000, 0x10, 4500),
> > > + RT1719_PSEL_CAPINFO(0x18, 45000, 0x10, 4000),
> > > + RT1719_PSEL_CAPINFO(0x18, 30000, 0x10, 3500),
> > > + RT1719_PSEL_CAPINFO(0x18, 25000, 0x10, 3000),
> > > + RT1719_PSEL_CAPINFO(0x18, 20000, 0x10, 2500),
> > > + RT1719_PSEL_CAPINFO(0x18, 15000, 0x10, 2000),
> > > + RT1719_PSEL_CAPINFO(0x18, 10000, 0x10, 1000),
> > > + RT1719_PSEL_CAPINFO(0x1C, 60000, 0x1F, 5000),
> > > + RT1719_PSEL_CAPINFO(0x1C, 45000, 0x1F, 4500),
> > > + RT1719_PSEL_CAPINFO(0x1C, 30000, 0x1F, 4000),
> > > + RT1719_PSEL_CAPINFO(0x1C, 24000, 0x1F, 3500),
> > > + RT1719_PSEL_CAPINFO(0x1C, 15000, 0x1F, 3000),
> > > + RT1719_PSEL_CAPINFO(0x1C, 10000, 0x1F, 2500),
> > > + RT1719_PSEL_CAPINFO(0x0C, 60000, 0x1F, 2000),
> > > + RT1719_PSEL_CAPINFO(0x0C, 45000, 0x1F, 1000),
> > > + RT1719_PSEL_CAPINFO(0x0C, 36000, 0x08, 5000),
> > > + RT1719_PSEL_CAPINFO(0x0C, 30000, 0x08, 4500),
> > > + RT1719_PSEL_CAPINFO(0x0C, 24000, 0x08, 4000),
> > > + RT1719_PSEL_CAPINFO(0x0C, 15000, 0x08, 3500),
> > > + RT1719_PSEL_CAPINFO(0x0C, 10000, 0x08, 3000),
> > > + RT1719_PSEL_CAPINFO(0x1E, 45000, 0x08, 2500),
> > > + RT1719_PSEL_CAPINFO(0x1E, 36000, 0x08, 2000),
> > > + RT1719_PSEL_CAPINFO(0x1E, 27000, 0x08, 1500),
> > > + RT1719_PSEL_CAPINFO(0x1E, 20000, 0x08, 1000),
> > > + RT1719_PSEL_CAPINFO(0x1E, 15000, 0x0F, 5000),
> > > + RT1719_PSEL_CAPINFO(0x1E, 9000, 0x0F, 4500),
> > > + RT1719_PSEL_CAPINFO(0x0E, 45000, 0x0F, 4000),
> > > + RT1719_PSEL_CAPINFO(0x0E, 36000, 0x0F, 3500),
> > > + RT1719_PSEL_CAPINFO(0x0E, 27000, 0x0F, 3000),
> > > + RT1719_PSEL_CAPINFO(0x0E, 20000, 0x0F, 2500),
> > > + RT1719_PSEL_CAPINFO(0x0E, 15000, 0x0F, 2000),
> > > + RT1719_PSEL_CAPINFO(0x0E, 9000, 0x0F, 1500),
> > > + RT1719_PSEL_CAPINFO(0x06, 45000, 0x0F, 1000),
> > > + RT1719_PSEL_CAPINFO(0x06, 36000, 0x0F, 500),
> > > + RT1719_PSEL_CAPINFO(0x06, 27000, 0x04, 5000),
> > > + RT1719_PSEL_CAPINFO(0x06, 24000, 0x04, 4500),
> > > + RT1719_PSEL_CAPINFO(0x06, 18000, 0x04, 4000),
> > > + RT1719_PSEL_CAPINFO(0x06, 12000, 0x04, 3500),
> > > + RT1719_PSEL_CAPINFO(0x06, 9000, 0x04, 3000),
> > > + RT1719_PSEL_CAPINFO(0x1F, 25000, 0x04, 2500),
> > > + RT1719_PSEL_CAPINFO(0x1F, 20000, 0x04, 2000),
> > > + RT1719_PSEL_CAPINFO(0x1F, 15000, 0x04, 1500),
> > > + RT1719_PSEL_CAPINFO(0x1F, 10000, 0x04, 1000),
> > > + RT1719_PSEL_CAPINFO(0x1F, 7500, 0x07, 5000),
> > > + RT1719_PSEL_CAPINFO(0x0F, 25000, 0x07, 4500),
> > > + RT1719_PSEL_CAPINFO(0x0F, 20000, 0x07, 4000),
> > > + RT1719_PSEL_CAPINFO(0x0F, 15000, 0x07, 3500),
> > > + RT1719_PSEL_CAPINFO(0x0F, 10000, 0x07, 3000),
> > > + RT1719_PSEL_CAPINFO(0x0F, 7500, 0x07, 2500),
> > > + RT1719_PSEL_CAPINFO(0x07, 25000, 0x07, 2000),
> > > + RT1719_PSEL_CAPINFO(0x07, 20000, 0x07, 1500),
> > > + RT1719_PSEL_CAPINFO(0x07, 15000, 0x07, 1000),
> > > + RT1719_PSEL_CAPINFO(0x07, 10000, 0x07, 500),
> > > + RT1719_PSEL_CAPINFO(0x07, 7500, 0x03, 5000),
> > > + RT1719_PSEL_CAPINFO(0x03, 25000, 0x03, 4500),
> > > + RT1719_PSEL_CAPINFO(0x03, 20000, 0x03, 4000),
> > > + RT1719_PSEL_CAPINFO(0x03, 15000, 0x03, 3500),
> > > + RT1719_PSEL_CAPINFO(0x03, 10000, 0x03, 3000),
> > > + RT1719_PSEL_CAPINFO(0x03, 7500, 0x03, 2500),
> > > + RT1719_PSEL_CAPINFO(0x01, 15000, 0x03, 2000),
> > > + RT1719_PSEL_CAPINFO(0x01, 10000, 0x03, 1500),
> > > + RT1719_PSEL_CAPINFO(0x01, 7500, 0x03, 1000),
> > > + RT1719_PSEL_CAPINFO(0x01, 2500, 0x03, 500)
> > > +};
> > > +
> > > +static u16 rt1719_gen_snkcap_by_current(const struct rt1719_psel_cap *psel_cap,
> > > + enum rt1719_snkcap capsel)
> > > +{
> > > + u16 cap = RT1719_PSEL_SUPPORT;
> > > +
> > > + if (!(psel_cap->himask & BIT(capsel)))
> > > + return 0;
> > > +
> > > + cap |= psel_cap->milliamp / 10;
> > > + return cap;
> > > +}
> > > +
> > > +static u16 rt1719_gen_snkcap_by_watt(const struct rt1719_psel_cap *psel_cap,
> > > + enum rt1719_snkcap capsel)
> > > +{
> > > + u32 volt_div[RT1719_MAX_SNKCAP] = { 5, 9, 12, 15, 20 };
> > > + u16 cap = RT1719_PSEL_SUPPORT;
> > > +
> > > + if (!(psel_cap->lomask & BIT(capsel)))
> > > + return 0;
> > > +
> > > + cap |= min(psel_cap->milliwatt / volt_div[capsel], (u32)5000) / 10;
> > > + return cap;
> > > +}
> > > +
> > > +static u16 rt1719_gen_snkcap(unsigned int pselinfo, enum rt1719_snkcap capsel)
> > > +{
> > > + int psel = FIELD_GET(RT1719_LATPSEL_MASK, pselinfo);
> > > + const struct rt1719_psel_cap *psel_cap;
> > > + bool by_current = false;
> > > +
> > > + if (pselinfo & RT1719_TBLSEL_MASK)
> > > + by_current = true;
> > > +
> > > + psel_cap = rt1719_psel_caps + psel;
> > > + if (by_current)
> > > + return rt1719_gen_snkcap_by_current(psel_cap, capsel);
> > > +
> > > + return rt1719_gen_snkcap_by_watt(psel_cap, capsel);
> > > +}
> > > +
> > > +static int rt1719_get_caps(struct rt1719_data *data)
> > > +{
> > > + unsigned int pselinfo, usbinfo;
> > > + int i, ret;
> > > +
> > > + ret = regmap_read(data->regmap, RT1719_REG_PSELINFO, &pselinfo);
> > > + ret |= regmap_read(data->regmap, RT1719_REG_USBSETINFO, &usbinfo);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + for (i = 0; i < RT1719_MAX_SNKCAP; i++)
> > > + data->snkcaps[i] = rt1719_gen_snkcap(pselinfo, i);
> > > +
> > > + usbinfo = FIELD_GET(RT1719_USBINFO_MASK, usbinfo);
> > > + if (usbinfo == RT1719_USB_DFPUFP)
> > > + data->drswap_support = true;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int rt1719_check_exist(struct rt1719_data *data)
> > > +{
> > > + u16 pid;
> > > + int ret;
> > > +
> > > + ret = rt1719_read16(data, RT1719_REG_VENID, &pid);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + if (pid != RT1719_UNIQUE_PID) {
> > > + dev_err(data->dev, "Incorrect PID 0x%04x\n", pid);
> > > + return -ENODEV;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static const struct regmap_config rt1719_regmap_config = {
> > > + .reg_bits = 8,
> > > + .val_bits = 8,
> > > + .max_register = 0xff,
> > > +};
> > > +
> > > +static int rt1719_probe(struct i2c_client *i2c)
> > > +{
> > > + struct rt1719_data *data;
> > > + struct fwnode_handle *fwnode;
> > > + struct typec_capability typec_cap = { };
> > > + int ret;
> > > +
> > > + data = devm_kzalloc(&i2c->dev, sizeof(*data), GFP_KERNEL);
> > > + if (!data)
> > > + return -ENOMEM;
> > > +
> > > + data->dev = &i2c->dev;
> > > + init_completion(&data->req_completion);
> > > +
> > > + data->regmap = devm_regmap_init_i2c(i2c, &rt1719_regmap_config);
> > > + if (IS_ERR(data->regmap)) {
> > > + ret = PTR_ERR(data->regmap);
> > > + dev_err(&i2c->dev, "Failed to init regmap (%d)\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + ret = rt1719_check_exist(data);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + ret = rt1719_get_caps(data);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + /*
> > > + * This fwnode has a "compatible" property, but is never populated as a
> > > + * struct device. Instead we simply parse it to read the properties.
> > > + * This it breaks fw_devlink=on. To maintain backward compatibility
> > > + * with existing DT files, we work around this by deleting any
> > > + * fwnode_links to/from this fwnode.
> > > + */
> > > + fwnode = device_get_named_child_node(&i2c->dev, "connector");
> > > + if (!fwnode)
> > > + return -ENODEV;
> > > +
> > > + fw_devlink_purge_absent_suppliers(fwnode);
> > > +
> > > + data->role_sw = fwnode_usb_role_switch_get(fwnode);
> > > + if (IS_ERR(data->role_sw)) {
> > > + ret = PTR_ERR(data->role_sw);
> > > + dev_err(&i2c->dev, "Failed to get usb role switch (%d)\n", ret);
> > > + goto err_fwnode_put;
> > > + }
> > > +
> > > + ret = devm_rt1719_psy_register(data);
> > > + if (ret) {
> > > + dev_err(&i2c->dev, "Failed to register psy (%d)\n", ret);
> > > + goto err_role_put;
> > > + }
> > > +
> > > + typec_cap.revision = USB_TYPEC_REV_1_2;
> > > + typec_cap.pd_revision = 0x300; /* USB-PD spec release 3.0 */
> > > + typec_cap.type = TYPEC_PORT_SNK;
> > > + typec_cap.data = TYPEC_PORT_DRD;
> > > + typec_cap.ops = &rt1719_port_ops;
> > > + typec_cap.fwnode = fwnode;
> > > + typec_cap.driver_data = data;
> > > + typec_cap.accessory[0] = TYPEC_ACCESSORY_DEBUG;
> > > +
> > > + data->partner_desc.identity = &data->partner_ident;
> > > +
> > > + data->port = typec_register_port(&i2c->dev, &typec_cap);
> > > + if (IS_ERR(data->port)) {
> > > + ret = PTR_ERR(data->port);
> > > + dev_err(&i2c->dev, "Failed to register typec port (%d)\n", ret);
> > > + goto err_role_put;
> > > + }
> > > +
> > > + ret = rt1719_init_attach_state(data);
> > > + if (ret) {
> > > + dev_err(&i2c->dev, "Failed to init attach state (%d)\n", ret);
> > > + goto err_role_put;
> > > + }
> > > +
> > > + ret = rt1719_irq_init(data);
> > > + if (ret) {
> > > + dev_err(&i2c->dev, "Failed to init irq\n");
> > > + goto err_role_put;
> > > + }
> > > +
> > > + fwnode_handle_put(fwnode);
> > > +
> > > + i2c_set_clientdata(i2c, data);
> > > +
> > > + return 0;
> > > +
> > > +err_role_put:
> > > + usb_role_switch_put(data->role_sw);
> > > +err_fwnode_put:
> > > + fwnode_handle_put(fwnode);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int rt1719_remove(struct i2c_client *i2c)
> > > +{
> > > + struct rt1719_data *data = i2c_get_clientdata(i2c);
> > > +
> > > + typec_unregister_port(data->port);
> > > + usb_role_switch_put(data->role_sw);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static const struct of_device_id __maybe_unused rt1719_device_table[] = {
> > > + { .compatible = "richtek,rt1719", },
> > > + { }
> > > +};
> > > +MODULE_DEVICE_TABLE(of, rt1719_device_table);
> > > +
> > > +static struct i2c_driver rt1719_driver = {
> > > + .driver = {
> > > + .name = "rt1719",
> > > + .of_match_table = rt1719_device_table,
> > > + },
> > > + .probe_new = rt1719_probe,
> > > + .remove = rt1719_remove,
> > > +};
> > > +module_i2c_driver(rt1719_driver);
> > > +
> > > +MODULE_AUTHOR("ChiYuan Huang <cy_huang@...htek.com>");
> > > +MODULE_DESCRIPTION("Richtek RT1719 Sink Only USBPD Controller Driver");
> > > +MODULE_LICENSE("GPL v2");
thanks,
--
heikki
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