// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2016-2017 Google, Inc * * Fairchild FUSB302 Type-C Chip Driver */ #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/extcon.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/pinctrl/consumer.h> #include <linux/proc_fs.h> #include <linux/regulator/consumer.h> #include <linux/sched/clock.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/types.h> #include <linux/usb.h> #include <linux/usb/typec.h> #include <linux/usb/tcpm.h> #include <linux/usb/pd.h> #include <linux/workqueue.h> #include "fusb302_reg.h" /* * When the device is SNK, BC_LVL interrupt is used to monitor cc pins * for the current capability offered by the SRC. As FUSB302 chip fires * the BC_LVL interrupt on PD signalings, cc lvl should be handled after * a delay to avoid measuring on PD activities. The delay is slightly * longer than PD_T_PD_DEBPUNCE (10-20ms). */ #define T_BC_LVL_DEBOUNCE_DELAY_MS … enum toggling_mode { … }; enum src_current_status { … }; static const u8 ra_mda_value[] = …; static const u8 rd_mda_value[] = …; #define LOG_BUFFER_ENTRIES … #define LOG_BUFFER_ENTRY_SIZE … struct fusb302_chip { … }; /* * Logging */ #ifdef CONFIG_DEBUG_FS static bool fusb302_log_full(struct fusb302_chip *chip) { … } __printf(2, 0) static void _fusb302_log(struct fusb302_chip *chip, const char *fmt, va_list args) { … } __printf(2, 3) static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...) { … } static int fusb302_debug_show(struct seq_file *s, void *v) { … } DEFINE_SHOW_ATTRIBUTE(…); static void fusb302_debugfs_init(struct fusb302_chip *chip) { … } static void fusb302_debugfs_exit(struct fusb302_chip *chip) { … } #else static void fusb302_log(const struct fusb302_chip *chip, const char *fmt, ...) { } static void fusb302_debugfs_init(const struct fusb302_chip *chip) { } static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { } #endif static int fusb302_i2c_write(struct fusb302_chip *chip, u8 address, u8 data) { … } static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address, u8 length, const u8 *data) { … } static int fusb302_i2c_read(struct fusb302_chip *chip, u8 address, u8 *data) { … } static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address, u8 length, u8 *data) { … } static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address, u8 mask, u8 value) { … } static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address, u8 set_bits) { … } static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address, u8 clear_bits) { … } static int fusb302_sw_reset(struct fusb302_chip *chip) { … } static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip, u8 retry_count) { … } /* * initialize interrupt on the chip * - unmasked interrupt: VBUS_OK */ static int fusb302_init_interrupt(struct fusb302_chip *chip) { … } static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode) { … } static int tcpm_init(struct tcpc_dev *dev) { … } static int tcpm_get_vbus(struct tcpc_dev *dev) { … } static int tcpm_get_current_limit(struct tcpc_dev *dev) { … } static int fusb302_set_src_current(struct fusb302_chip *chip, enum src_current_status status) { … } static int fusb302_set_toggling(struct fusb302_chip *chip, enum toggling_mode mode) { … } static const char * const typec_cc_status_name[] = …; static const enum src_current_status cc_src_current[] = …; static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) { … } static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1, enum typec_cc_status *cc2) { … } static int tcpm_set_polarity(struct tcpc_dev *dev, enum typec_cc_polarity polarity) { … } static int tcpm_set_vconn(struct tcpc_dev *dev, bool on) { … } static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge) { … } static int fusb302_pd_tx_flush(struct fusb302_chip *chip) { … } static int fusb302_pd_rx_flush(struct fusb302_chip *chip) { … } static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on) { … } static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on) { … } static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on) { … } static const char * const typec_role_name[] = …; static const char * const typec_data_role_name[] = …; static int tcpm_set_roles(struct tcpc_dev *dev, bool attached, enum typec_role pwr, enum typec_data_role data) { … } static int tcpm_start_toggling(struct tcpc_dev *dev, enum typec_port_type port_type, enum typec_cc_status cc) { … } static int fusb302_pd_send_message(struct fusb302_chip *chip, const struct pd_message *msg) { … } static int fusb302_pd_send_hardreset(struct fusb302_chip *chip) { … } static const char * const transmit_type_name[] = …; static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type, const struct pd_message *msg, unsigned int negotiated_rev) { … } static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl) { … } static void fusb302_bc_lvl_handler_work(struct work_struct *work) { … } static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) { … } static const char * const cc_polarity_name[] = …; static int fusb302_set_cc_polarity_and_pull(struct fusb302_chip *chip, enum typec_cc_polarity cc_polarity, bool pull_up, bool pull_down) { … } static int fusb302_handle_togdone_snk(struct fusb302_chip *chip, u8 togdone_result) { … } /* On error returns < 0, otherwise a typec_cc_status value */ static int fusb302_get_src_cc_status(struct fusb302_chip *chip, enum typec_cc_polarity cc_polarity, enum typec_cc_status *cc) { … } static int fusb302_handle_togdone_src(struct fusb302_chip *chip, u8 togdone_result) { … } static int fusb302_handle_togdone(struct fusb302_chip *chip) { … } static int fusb302_pd_reset(struct fusb302_chip *chip) { … } static int fusb302_pd_read_message(struct fusb302_chip *chip, struct pd_message *msg) { … } static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) { … } static void fusb302_irq_work(struct work_struct *work) { … } static int init_gpio(struct fusb302_chip *chip) { … } #define PDO_FIXED_FLAGS … static const u32 src_pdo[] = …; static const u32 snk_pdo[] = …; static const struct property_entry port_props[] = …; static struct fwnode_handle *fusb302_fwnode_get(struct device *dev) { … } static int fusb302_probe(struct i2c_client *client) { … } static void fusb302_remove(struct i2c_client *client) { … } static int fusb302_pm_suspend(struct device *dev) { … } static int fusb302_pm_resume(struct device *dev) { … } static const struct of_device_id fusb302_dt_match[] __maybe_unused = …; MODULE_DEVICE_TABLE(of, fusb302_dt_match); static const struct i2c_device_id fusb302_i2c_device_id[] = …; MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id); static const struct dev_pm_ops fusb302_pm_ops = …; static struct i2c_driver fusb302_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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