// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2021-2024 Cisco Systems, Inc. and/or its affiliates. All rights reserved. */ /* * Currently this driver does not fully support the serial port of the * Extron, only the USB port is fully supported. * * Issues specific to using the serial port instead of the USB since the * serial port doesn't detect if the device is powered off: * * - Some periodic ping mechanism is needed to detect when the Extron is * powered off and when it is powered on again. * - What to do when it is powered off and the driver is modprobed? Keep * trying to contact the Extron indefinitely? */ #include <linux/completion.h> #include <linux/ctype.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/time.h> #include "extron-da-hd-4k-plus.h" MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(…) …; static unsigned int vendor_id; module_param(vendor_id, uint, 0444); MODULE_PARM_DESC(…) …; static char manufacturer_name[4]; module_param_string(…); MODULE_PARM_DESC(…) …; static bool hpd_never_low; module_param(hpd_never_low, bool, 0644); MODULE_PARM_DESC(…) …; #define EXTRON_TIMEOUT_SECS … static const u8 hdmi_edid[256] = …; static const u8 hdmi_edid_4k_300[256] = …; static const u8 hdmi_edid_4k_600[256] = …; static int extron_send_byte(struct serio *serio, char byte) { … } static int extron_send_len(struct serio *serio, const char *command, const unsigned char *bin, unsigned int len) { … } static int extron_send_and_wait_len(struct extron *extron, struct extron_port *port, const char *cmd, const unsigned char *bin, unsigned int len, const char *response) { … } static int extron_send_and_wait(struct extron *extron, struct extron_port *port, const char *cmd, const char *response) { … } static void extron_parse_edid(struct extron_port *port) { … } static int get_edid_tag_location(const u8 *edid, unsigned int size, u8 want_tag, u8 ext_tag) { … } static void extron_edid_crc(u8 *edid) { … } /* * Fill in EDID string. As per VESA EDID-1.3, strings are at most 13 chars * long. If shorter then add a 0x0a character after the string and pad the * remainder with spaces. */ static void extron_set_edid_string(u8 *start, const char *s) { … } static void extron_update_edid(struct extron_port *port, unsigned int blocks) { … } static int extron_write_edid(struct extron_port *port, const u8 *edid, unsigned int blocks) { … } static void update_edid_work(struct work_struct *w) { … } static void extron_read_edid(struct extron_port *port) { … } static void extron_irq_work_handler(struct work_struct *work) { … } static void extron_process_received(struct extron_port *port, const char *data) { … } static void extron_port_signal_change(struct extron_port *port, bool has_sig) { … } static void extron_process_signal_change(struct extron *extron, const char *data) { … } static void extron_port_edid_change(struct extron_port *port, bool has_edid) { … } static void extron_process_edid_change(struct extron *extron, const char *data) { … } static void extron_phys_addr_change(struct extron_port *port, u16 pa) { … } static void extron_process_tx_done(struct extron_port *port, char status) { … } static void extron_add_edid(struct extron_port *port, const char *hex) { … } static irqreturn_t extron_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { … } static int extron_cec_adap_enable(struct cec_adapter *adap, bool enable) { … } static int extron_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr) { … } static int extron_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, u32 signal_free_time, struct cec_msg *msg) { … } static void extron_cec_adap_unconfigured(struct cec_adapter *adap) { … } static void extron_cec_configured(struct cec_adapter *adap) { … } static void extron_cec_adap_nb_transmit_canceled(struct cec_adapter *adap, const struct cec_msg *msg) { … } static int extron_received(struct cec_adapter *adap, struct cec_msg *msg) { … } #define log_printf(adap, file, fmt, arg...) … static const char * const pwr_state[] = …; static void extron_adap_status_port(struct extron_port *port, struct seq_file *file) { … } static void extron_adap_status(struct cec_adapter *adap, struct seq_file *file) { … } static const struct cec_adap_ops extron_cec_adap_ops = …; static int extron_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { … } static int extron_enum_input(struct file *file, void *priv, struct v4l2_input *inp) { … } static int extron_g_input(struct file *file, void *priv, unsigned int *i) { … } static int extron_s_input(struct file *file, void *priv, unsigned int i) { … } static int extron_enum_output(struct file *file, void *priv, struct v4l2_output *out) { … } static int extron_g_output(struct file *file, void *priv, unsigned int *o) { … } static int extron_s_output(struct file *file, void *priv, unsigned int o) { … } static int extron_g_edid(struct file *file, void *_fh, struct v4l2_edid *edid) { … } static int extron_s_edid(struct file *file, void *_fh, struct v4l2_edid *edid) { … } static int extron_log_status(struct file *file, void *priv) { … } static const struct v4l2_ioctl_ops extron_ioctl_ops = …; static const struct v4l2_file_operations extron_fops = …; static const struct video_device extron_videodev = …; static void extron_disconnect(struct serio *serio) { … } static int extron_setup(struct extron *extron) { … } static int extron_setup_thread(void *_extron) { … } static int extron_connect(struct serio *serio, struct serio_driver *drv) { … } static const struct serio_device_id extron_serio_ids[] = …; MODULE_DEVICE_TABLE(serio, extron_serio_ids); static struct serio_driver extron_drv = …; module_serio_driver(…) …;
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