staging: typec: rt1711h typec chip driver
Richtek RT1711H Type-C chip driver that works with Type-C Port Controller Manager to provide USB PD and USB Type-C functionalities. Add definition of TCPC_CC_STATUS_TOGGLING. Signed-off-by: ShuFan Lee <shufan_lee@richtek.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -9,6 +9,14 @@ config TYPEC_TCPCI
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help
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Type-C Port Controller driver for TCPCI-compliant controller.
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config TYPEC_RT1711H
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tristate "Richtek RT1711H Type-C chip driver"
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select TYPEC_TCPCI
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help
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Richtek RT1711H Type-C chip driver that works with
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Type-C Port Controller Manager to provide USB PD and USB
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Type-C functionalities.
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endif
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endmenu
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@ -1 +1,2 @@
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obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o
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obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o
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@ -59,6 +59,7 @@
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#define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0)
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#define TCPC_CC_STATUS 0x1d
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#define TCPC_CC_STATUS_TOGGLING BIT(5)
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#define TCPC_CC_STATUS_TERM BIT(4)
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#define TCPC_CC_STATUS_CC2_SHIFT 2
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#define TCPC_CC_STATUS_CC2_MASK 0x3
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312
drivers/staging/typec/tcpci_rt1711h.c
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312
drivers/staging/typec/tcpci_rt1711h.c
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@ -0,0 +1,312 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, Richtek Technology Corporation
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*
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* Richtek RT1711H Type-C Chip Driver
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/gpio/consumer.h>
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#include <linux/usb/tcpm.h>
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#include <linux/regmap.h>
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#include "tcpci.h"
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#define RT1711H_VID 0x29CF
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#define RT1711H_PID 0x1711
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#define RT1711H_RTCTRL8 0x9B
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/* Autoidle timeout = (tout * 2 + 1) * 6.4ms */
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#define RT1711H_RTCTRL8_SET(ck300, ship_off, auto_idle, tout) \
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(((ck300) << 7) | ((ship_off) << 5) | \
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((auto_idle) << 3) | ((tout) & 0x07))
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#define RT1711H_RTCTRL11 0x9E
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/* I2C timeout = (tout + 1) * 12.5ms */
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#define RT1711H_RTCTRL11_SET(en, tout) \
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(((en) << 7) | ((tout) & 0x0F))
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#define RT1711H_RTCTRL13 0xA0
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#define RT1711H_RTCTRL14 0xA1
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#define RT1711H_RTCTRL15 0xA2
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#define RT1711H_RTCTRL16 0xA3
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struct rt1711h_chip {
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struct tcpci_data data;
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struct tcpci *tcpci;
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struct device *dev;
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};
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static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
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{
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return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16));
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}
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static int rt1711h_write16(struct rt1711h_chip *chip, unsigned int reg, u16 val)
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{
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return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16));
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}
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static int rt1711h_read8(struct rt1711h_chip *chip, unsigned int reg, u8 *val)
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{
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return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8));
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}
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static int rt1711h_write8(struct rt1711h_chip *chip, unsigned int reg, u8 val)
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{
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return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8));
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}
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static const struct regmap_config rt1711h_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 0xFF, /* 0x80 .. 0xFF are vendor defined */
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};
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static struct rt1711h_chip *tdata_to_rt1711h(struct tcpci_data *tdata)
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{
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return container_of(tdata, struct rt1711h_chip, data);
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}
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static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
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{
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int ret;
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struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
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/* CK 300K from 320K, shipping off, auto_idle enable, tout = 32ms */
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ret = rt1711h_write8(chip, RT1711H_RTCTRL8,
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RT1711H_RTCTRL8_SET(0, 1, 1, 2));
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if (ret < 0)
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return ret;
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/* I2C reset : (val + 1) * 12.5ms */
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ret = rt1711h_write8(chip, RT1711H_RTCTRL11,
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RT1711H_RTCTRL11_SET(1, 0x0F));
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if (ret < 0)
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return ret;
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/* tTCPCfilter : (26.7 * val) us */
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ret = rt1711h_write8(chip, RT1711H_RTCTRL14, 0x0F);
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if (ret < 0)
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return ret;
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/* tDRP : (51.2 + 6.4 * val) ms */
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ret = rt1711h_write8(chip, RT1711H_RTCTRL15, 0x04);
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if (ret < 0)
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return ret;
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/* dcSRC.DRP : 33% */
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return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
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}
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static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata,
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bool enable)
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{
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struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
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return rt1711h_write8(chip, RT1711H_RTCTRL8,
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RT1711H_RTCTRL8_SET(0, 1, !enable, 2));
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}
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static int rt1711h_start_drp_toggling(struct tcpci *tcpci,
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struct tcpci_data *tdata,
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enum typec_cc_status cc)
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{
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struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
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int ret;
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unsigned int reg = 0;
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switch (cc) {
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default:
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case TYPEC_CC_RP_DEF:
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reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
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TCPC_ROLE_CTRL_RP_VAL_SHIFT);
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break;
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case TYPEC_CC_RP_1_5:
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reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
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TCPC_ROLE_CTRL_RP_VAL_SHIFT);
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break;
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case TYPEC_CC_RP_3_0:
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reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
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TCPC_ROLE_CTRL_RP_VAL_SHIFT);
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break;
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}
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if (cc == TYPEC_CC_RD)
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reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
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(TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
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else
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reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
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(TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
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ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg);
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if (ret < 0)
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return ret;
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usleep_range(500, 1000);
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return 0;
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}
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static irqreturn_t rt1711h_irq(int irq, void *dev_id)
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{
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int ret;
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u16 alert;
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u8 status;
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struct rt1711h_chip *chip = dev_id;
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if (!chip->tcpci)
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return IRQ_HANDLED;
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ret = rt1711h_read16(chip, TCPC_ALERT, &alert);
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if (ret < 0)
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goto out;
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if (alert & TCPC_ALERT_CC_STATUS) {
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ret = rt1711h_read8(chip, TCPC_CC_STATUS, &status);
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if (ret < 0)
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goto out;
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/* Clear cc change event triggered by starting toggling */
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if (status & TCPC_CC_STATUS_TOGGLING)
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rt1711h_write8(chip, TCPC_ALERT, TCPC_ALERT_CC_STATUS);
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}
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out:
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return tcpci_irq(chip->tcpci);
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}
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static int rt1711h_init_alert(struct rt1711h_chip *chip,
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struct i2c_client *client)
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{
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int ret;
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/* Disable chip interrupts before requesting irq */
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ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0);
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if (ret < 0)
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return ret;
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ret = devm_request_threaded_irq(chip->dev, client->irq, NULL,
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rt1711h_irq,
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IRQF_ONESHOT | IRQF_TRIGGER_LOW,
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dev_name(chip->dev), chip);
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if (ret < 0)
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return ret;
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enable_irq_wake(client->irq);
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return 0;
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}
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static int rt1711h_sw_reset(struct rt1711h_chip *chip)
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{
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int ret;
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ret = rt1711h_write8(chip, RT1711H_RTCTRL13, 0x01);
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if (ret < 0)
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return ret;
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usleep_range(1000, 2000);
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return 0;
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}
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static int rt1711h_check_revision(struct i2c_client *i2c)
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{
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int ret;
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ret = i2c_smbus_read_word_data(i2c, TCPC_VENDOR_ID);
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if (ret < 0)
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return ret;
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if (ret != RT1711H_VID) {
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dev_err(&i2c->dev, "vid is not correct, 0x%04x\n", ret);
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return -ENODEV;
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}
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ret = i2c_smbus_read_word_data(i2c, TCPC_PRODUCT_ID);
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if (ret < 0)
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return ret;
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if (ret != RT1711H_PID) {
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dev_err(&i2c->dev, "pid is not correct, 0x%04x\n", ret);
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return -ENODEV;
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}
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return 0;
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}
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static int rt1711h_probe(struct i2c_client *client,
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const struct i2c_device_id *i2c_id)
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{
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int ret;
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struct rt1711h_chip *chip;
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ret = rt1711h_check_revision(client);
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if (ret < 0) {
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dev_err(&client->dev, "check vid/pid fail\n");
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return ret;
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}
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chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
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if (!chip)
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return -ENOMEM;
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chip->data.regmap = devm_regmap_init_i2c(client,
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&rt1711h_regmap_config);
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if (IS_ERR(chip->data.regmap))
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return PTR_ERR(chip->data.regmap);
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chip->dev = &client->dev;
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i2c_set_clientdata(client, chip);
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ret = rt1711h_sw_reset(chip);
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if (ret < 0)
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return ret;
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ret = rt1711h_init_alert(chip, client);
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if (ret < 0)
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return ret;
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chip->data.init = rt1711h_init;
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chip->data.set_vconn = rt1711h_set_vconn;
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chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
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chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
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if (IS_ERR_OR_NULL(chip->tcpci))
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return PTR_ERR(chip->tcpci);
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return 0;
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}
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static int rt1711h_remove(struct i2c_client *client)
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{
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struct rt1711h_chip *chip = i2c_get_clientdata(client);
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tcpci_unregister_port(chip->tcpci);
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return 0;
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}
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static const struct i2c_device_id rt1711h_id[] = {
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{ "rt1711h", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, rt1711h_id);
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#ifdef CONFIG_OF
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static const struct of_device_id rt1711h_of_match[] = {
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{ .compatible = "richtek,rt1711h", },
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{},
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};
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MODULE_DEVICE_TABLE(of, rt1711h_of_match);
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#endif
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static struct i2c_driver rt1711h_i2c_driver = {
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.driver = {
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.name = "rt1711h",
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.of_match_table = of_match_ptr(rt1711h_of_match),
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},
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.probe = rt1711h_probe,
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.remove = rt1711h_remove,
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.id_table = rt1711h_id,
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};
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module_i2c_driver(rt1711h_i2c_driver);
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MODULE_AUTHOR("ShuFan Lee <shufan_lee@richtek.com>");
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MODULE_DESCRIPTION("RT1711H USB Type-C Port Controller Interface Driver");
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MODULE_LICENSE("GPL");
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