// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2008 Christian Pellegrin <[email protected]> * * Notes: the MAX3100 doesn't provide an interrupt on CTS so we have * to use polling for flow control. TX empty IRQ is unusable, since * writing conf clears FIFO buffer and we cannot have this interrupt * always asking us for attention. * * The initial minor number is 209 in the low-density serial port: * mknod /dev/ttyMAX0 c 204 209 */ #define MAX3100_MAJOR … #define MAX3100_MINOR … /* 4 MAX3100s should be enough for everyone */ #define MAX_MAX3100 … #include <linux/container_of.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/freezer.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/pm.h> #include <linux/property.h> #include <linux/serial_core.h> #include <linux/serial.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/tty_flip.h> #include <linux/tty.h> #include <linux/types.h> #include <linux/unaligned.h> #define MAX3100_C … #define MAX3100_D … #define MAX3100_W … #define MAX3100_RX … #define MAX3100_WC … #define MAX3100_RC … #define MAX3100_WD … #define MAX3100_RD … #define MAX3100_CMD … #define MAX3100_T … #define MAX3100_R … #define MAX3100_FEN … #define MAX3100_SHDN … #define MAX3100_TM … #define MAX3100_RM … #define MAX3100_PM … #define MAX3100_RAM … #define MAX3100_IR … #define MAX3100_ST … #define MAX3100_PE … #define MAX3100_L … #define MAX3100_BAUD … #define MAX3100_TE … #define MAX3100_RAFE … #define MAX3100_RTS … #define MAX3100_CTS … #define MAX3100_PT … #define MAX3100_DATA … #define MAX3100_RT … #define MAX3100_RTC … /* the following simulate a status reg for ignore_status_mask */ #define MAX3100_STATUS_PE … #define MAX3100_STATUS_FE … #define MAX3100_STATUS_OE … struct max3100_port { … }; static inline struct max3100_port *to_max3100_port(struct uart_port *port) { … } static struct max3100_port *max3100s[MAX_MAX3100]; /* the chips */ static DEFINE_MUTEX(max3100s_lock); /* race on probe */ static int max3100_do_parity(struct max3100_port *s, u16 c) { … } static int max3100_check_parity(struct max3100_port *s, u16 c) { … } static void max3100_calc_parity(struct max3100_port *s, u16 *c) { … } static int max3100_sr(struct max3100_port *s, u16 tx, u16 *rx) { … } static int max3100_handlerx_unlocked(struct max3100_port *s, u16 rx) { … } static int max3100_handlerx(struct max3100_port *s, u16 rx) { … } static void max3100_work(struct work_struct *w) { … } static void max3100_dowork(struct max3100_port *s) { … } static void max3100_timeout(struct timer_list *t) { … } static irqreturn_t max3100_irq(int irqno, void *dev_id) { … } static void max3100_enable_ms(struct uart_port *port) { … } static void max3100_start_tx(struct uart_port *port) { … } static void max3100_stop_rx(struct uart_port *port) { … } static unsigned int max3100_tx_empty(struct uart_port *port) { … } static unsigned int max3100_get_mctrl(struct uart_port *port) { … } static void max3100_set_mctrl(struct uart_port *port, unsigned int mctrl) { … } static void max3100_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static void max3100_shutdown(struct uart_port *port) { … } static int max3100_startup(struct uart_port *port) { … } static const char *max3100_type(struct uart_port *port) { … } static void max3100_release_port(struct uart_port *port) { … } static void max3100_config_port(struct uart_port *port, int flags) { … } static int max3100_verify_port(struct uart_port *port, struct serial_struct *ser) { … } static void max3100_stop_tx(struct uart_port *port) { … } static int max3100_request_port(struct uart_port *port) { … } static void max3100_break_ctl(struct uart_port *port, int break_state) { … } static const struct uart_ops max3100_ops = …; static struct uart_driver max3100_uart_driver = …; static int uart_driver_registered; static int max3100_probe(struct spi_device *spi) { … } static void max3100_remove(struct spi_device *spi) { … } static int max3100_suspend(struct device *dev) { … } static int max3100_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(max3100_pm_ops, max3100_suspend, max3100_resume); static const struct spi_device_id max3100_spi_id[] = …; MODULE_DEVICE_TABLE(spi, max3100_spi_id); static const struct of_device_id max3100_of_match[] = …; MODULE_DEVICE_TABLE(of, max3100_of_match); static struct spi_driver max3100_driver = …; module_spi_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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