// SPDX-License-Identifier: GPL-2.0-or-later /* * Freescale LINFlexD UART serial port driver * * Copyright 2012-2016 Freescale Semiconductor, Inc. * Copyright 2017-2019 NXP */ #include <linux/console.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/serial_core.h> #include <linux/slab.h> #include <linux/tty_flip.h> #include <linux/delay.h> /* All registers are 32-bit width */ #define LINCR1 … #define LINIER … #define LINSR … #define LINESR … #define UARTCR … #define UARTSR … #define LINTCSR … #define LINOCR … #define LINTOCR … #define LINFBRR … #define LINIBRR … #define LINCFR … #define LINCR2 … #define BIDR … #define BDRL … #define BDRM … #define IFER … #define IFMI … #define IFMR … #define GCR … #define UARTPTO … #define UARTCTO … /* * Register field definitions */ #define LINFLEXD_LINCR1_INIT … #define LINFLEXD_LINCR1_MME … #define LINFLEXD_LINCR1_BF … #define LINFLEXD_LINSR_LINS_INITMODE … #define LINFLEXD_LINSR_LINS_MASK … #define LINFLEXD_LINIER_SZIE … #define LINFLEXD_LINIER_OCIE … #define LINFLEXD_LINIER_BEIE … #define LINFLEXD_LINIER_CEIE … #define LINFLEXD_LINIER_HEIE … #define LINFLEXD_LINIER_FEIE … #define LINFLEXD_LINIER_BOIE … #define LINFLEXD_LINIER_LSIE … #define LINFLEXD_LINIER_WUIE … #define LINFLEXD_LINIER_DBFIE … #define LINFLEXD_LINIER_DBEIETOIE … #define LINFLEXD_LINIER_DRIE … #define LINFLEXD_LINIER_DTIE … #define LINFLEXD_LINIER_HRIE … #define LINFLEXD_UARTCR_OSR_MASK … #define LINFLEXD_UARTCR_OSR(uartcr) … #define LINFLEXD_UARTCR_ROSE … #define LINFLEXD_UARTCR_RFBM … #define LINFLEXD_UARTCR_TFBM … #define LINFLEXD_UARTCR_WL1 … #define LINFLEXD_UARTCR_PC1 … #define LINFLEXD_UARTCR_RXEN … #define LINFLEXD_UARTCR_TXEN … #define LINFLEXD_UARTCR_PC0 … #define LINFLEXD_UARTCR_PCE … #define LINFLEXD_UARTCR_WL0 … #define LINFLEXD_UARTCR_UART … #define LINFLEXD_UARTSR_SZF … #define LINFLEXD_UARTSR_OCF … #define LINFLEXD_UARTSR_PE3 … #define LINFLEXD_UARTSR_PE2 … #define LINFLEXD_UARTSR_PE1 … #define LINFLEXD_UARTSR_PE0 … #define LINFLEXD_UARTSR_RMB … #define LINFLEXD_UARTSR_FEF … #define LINFLEXD_UARTSR_BOF … #define LINFLEXD_UARTSR_RPS … #define LINFLEXD_UARTSR_WUF … #define LINFLEXD_UARTSR_4 … #define LINFLEXD_UARTSR_TO … #define LINFLEXD_UARTSR_DRFRFE … #define LINFLEXD_UARTSR_DTFTFF … #define LINFLEXD_UARTSR_NF … #define LINFLEXD_UARTSR_PE … #define LINFLEX_LDIV_MULTIPLIER … #define DRIVER_NAME … #define DEV_NAME … #define UART_NR … #define EARLYCON_BUFFER_INITIAL_CAP … #define PREINIT_DELAY … static const struct of_device_id linflex_dt_ids[] = …; MODULE_DEVICE_TABLE(of, linflex_dt_ids); #ifdef CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE static struct uart_port *earlycon_port; static bool linflex_earlycon_same_instance; static DEFINE_SPINLOCK(init_lock); static bool during_init; static struct { … } earlycon_buf; #endif static void linflex_stop_tx(struct uart_port *port) { … } static void linflex_stop_rx(struct uart_port *port) { … } static void linflex_put_char(struct uart_port *sport, unsigned char c) { … } static inline void linflex_transmit_buffer(struct uart_port *sport) { … } static void linflex_start_tx(struct uart_port *port) { … } static irqreturn_t linflex_txint(int irq, void *dev_id) { … } static irqreturn_t linflex_rxint(int irq, void *dev_id) { … } static irqreturn_t linflex_int(int irq, void *dev_id) { … } /* return TIOCSER_TEMT when transmitter is not busy */ static unsigned int linflex_tx_empty(struct uart_port *port) { … } static unsigned int linflex_get_mctrl(struct uart_port *port) { … } static void linflex_set_mctrl(struct uart_port *port, unsigned int mctrl) { … } static void linflex_break_ctl(struct uart_port *port, int break_state) { … } static void linflex_setup_watermark(struct uart_port *sport) { … } static int linflex_startup(struct uart_port *port) { … } static void linflex_shutdown(struct uart_port *port) { … } static void linflex_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static const char *linflex_type(struct uart_port *port) { … } static void linflex_release_port(struct uart_port *port) { … } static int linflex_request_port(struct uart_port *port) { … } /* configure/auto-configure the port */ static void linflex_config_port(struct uart_port *port, int flags) { … } static const struct uart_ops linflex_pops = …; static struct uart_port *linflex_ports[UART_NR]; #ifdef CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE static void linflex_console_putchar(struct uart_port *port, unsigned char ch) { … } static void linflex_earlycon_putchar(struct uart_port *port, unsigned char ch) { … } static void linflex_string_write(struct uart_port *sport, const char *s, unsigned int count) { … } static void linflex_console_write(struct console *co, const char *s, unsigned int count) { … } /* * if the port was already initialised (eg, by a boot loader), * try to determine the current setup. */ static void __init linflex_console_get_options(struct uart_port *sport, int *parity, int *bits) { … } static int __init linflex_console_setup(struct console *co, char *options) { … } static struct uart_driver linflex_reg; static struct console linflex_console = …; static void linflex_earlycon_write(struct console *con, const char *s, unsigned int n) { … } static int __init linflex_early_console_setup(struct earlycon_device *device, const char *options) { … } OF_EARLYCON_DECLARE(…); #define LINFLEX_CONSOLE … #else #define LINFLEX_CONSOLE … #endif static struct uart_driver linflex_reg = …; static int linflex_probe(struct platform_device *pdev) { … } static void linflex_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int linflex_suspend(struct device *dev) { … } static int linflex_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(linflex_pm_ops, linflex_suspend, linflex_resume); static struct platform_driver linflex_driver = …; static int __init linflex_serial_init(void) { … } static void __exit linflex_serial_exit(void) { … } module_init(…) …; module_exit(linflex_serial_exit); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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