// SPDX-License-Identifier: GPL-2.0+ /* * MA35D1 serial driver * Copyright (C) 2023 Nuvoton Technology Corp. */ #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/iopoll.h> #include <linux/serial_core.h> #include <linux/slab.h> #include <linux/tty_flip.h> #include <linux/units.h> #define MA35_UART_NR … #define MA35_RBR_REG … #define MA35_THR_REG … #define MA35_IER_REG … #define MA35_FCR_REG … #define MA35_LCR_REG … #define MA35_MCR_REG … #define MA35_MSR_REG … #define MA35_FSR_REG … #define MA35_ISR_REG … #define MA35_TOR_REG … #define MA35_BAUD_REG … #define MA35_ALTCTL_REG … #define MA35_FUN_SEL_REG … #define MA35_WKCTL_REG … #define MA35_WKSTS_REG … /* MA35_IER_REG - Interrupt Enable Register */ #define MA35_IER_RDA_IEN … #define MA35_IER_THRE_IEN … #define MA35_IER_RLS_IEN … #define MA35_IER_RTO_IEN … #define MA35_IER_BUFERR_IEN … #define MA35_IER_TIME_OUT_EN … #define MA35_IER_AUTO_RTS … #define MA35_IER_AUTO_CTS … /* MA35_FCR_REG - FIFO Control Register */ #define MA35_FCR_RFR … #define MA35_FCR_TFR … #define MA35_FCR_RFITL_MASK … #define MA35_FCR_RFITL_1BYTE … #define MA35_FCR_RFITL_4BYTES … #define MA35_FCR_RFITL_8BYTES … #define MA35_FCR_RFITL_14BYTES … #define MA35_FCR_RFITL_30BYTES … #define MA35_FCR_RTSTL_MASK … #define MA35_FCR_RTSTL_1BYTE … #define MA35_FCR_RTSTL_4BYTES … #define MA35_FCR_RTSTL_8BYTES … #define MA35_FCR_RTSTL_14BYTES … #define MA35_FCR_RTSTLL_30BYTES … /* MA35_LCR_REG - Line Control Register */ #define MA35_LCR_NSB … #define MA35_LCR_PBE … #define MA35_LCR_EPE … #define MA35_LCR_SPE … #define MA35_LCR_BREAK … #define MA35_LCR_WLS_MASK … #define MA35_LCR_WLS_5BITS … #define MA35_LCR_WLS_6BITS … #define MA35_LCR_WLS_7BITS … #define MA35_LCR_WLS_8BITS … /* MA35_MCR_REG - Modem Control Register */ #define MA35_MCR_RTS_CTRL … #define MA35_MCR_RTSACTLV … #define MA35_MCR_RTSSTS … /* MA35_MSR_REG - Modem Status Register */ #define MA35_MSR_CTSDETF … #define MA35_MSR_CTSSTS … #define MA35_MSR_CTSACTLV … /* MA35_FSR_REG - FIFO Status Register */ #define MA35_FSR_RX_OVER_IF … #define MA35_FSR_PEF … #define MA35_FSR_FEF … #define MA35_FSR_BIF … #define MA35_FSR_RX_EMPTY … #define MA35_FSR_RX_FULL … #define MA35_FSR_TX_EMPTY … #define MA35_FSR_TX_FULL … #define MA35_FSR_TX_OVER_IF … #define MA35_FSR_TE_FLAG … #define MA35_FSR_RXPTR_MSK … #define MA35_FSR_TXPTR_MSK … /* MA35_ISR_REG - Interrupt Status Register */ #define MA35_ISR_RDA_IF … #define MA35_ISR_THRE_IF … #define MA35_ISR_RLSIF … #define MA35_ISR_MODEMIF … #define MA35_ISR_RXTO_IF … #define MA35_ISR_BUFEIF … #define MA35_ISR_WK_IF … #define MA35_ISR_RDAINT … #define MA35_ISR_THRE_INT … #define MA35_ISR_ALL … /* MA35_BAUD_REG - Baud Rate Divider Register */ #define MA35_BAUD_MODE_MASK … #define MA35_BAUD_MODE0 … #define MA35_BAUD_MODE1 … #define MA35_BAUD_MODE2 … #define MA35_BAUD_MASK … /* MA35_ALTCTL_REG - Alternate Control/Status Register */ #define MA35_ALTCTL_RS485AUD … /* MA35_FUN_SEL_REG - Function Select Register */ #define MA35_FUN_SEL_MASK … #define MA35_FUN_SEL_UART … #define MA35_FUN_SEL_RS485 … /* The constrain for MA35D1 UART baud rate divider */ #define MA35_BAUD_DIV_MAX … #define MA35_BAUD_DIV_MIN … /* UART FIFO depth */ #define MA35_UART_FIFO_DEPTH … /* UART console clock */ #define MA35_UART_CONSOLE_CLK … /* UART register ioremap size */ #define MA35_UART_REG_SIZE … /* Rx Timeout */ #define MA35_UART_RX_TOUT … #define MA35_IER_CONFIG … #define MA35_ISR_IF_CHECK … #define MA35_FSR_TX_BOTH_EMPTY … static struct uart_driver ma35d1serial_reg; struct uart_ma35d1_port { … }; static struct uart_ma35d1_port ma35d1serial_ports[MA35_UART_NR]; static struct uart_ma35d1_port *to_ma35d1_uart_port(struct uart_port *uart) { … } static u32 serial_in(struct uart_ma35d1_port *p, u32 offset) { … } static void serial_out(struct uart_ma35d1_port *p, u32 offset, u32 value) { … } static void __stop_tx(struct uart_ma35d1_port *p) { … } static void ma35d1serial_stop_tx(struct uart_port *port) { … } static void transmit_chars(struct uart_ma35d1_port *up) { … } static void ma35d1serial_start_tx(struct uart_port *port) { … } static void ma35d1serial_stop_rx(struct uart_port *port) { … } static void receive_chars(struct uart_ma35d1_port *up) { … } static irqreturn_t ma35d1serial_interrupt(int irq, void *dev_id) { … } static u32 ma35d1serial_tx_empty(struct uart_port *port) { … } static u32 ma35d1serial_get_mctrl(struct uart_port *port) { … } static void ma35d1serial_set_mctrl(struct uart_port *port, u32 mctrl) { … } static void ma35d1serial_break_ctl(struct uart_port *port, int break_state) { … } static int ma35d1serial_startup(struct uart_port *port) { … } static void ma35d1serial_shutdown(struct uart_port *port) { … } static void ma35d1serial_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static const char *ma35d1serial_type(struct uart_port *port) { … } static void ma35d1serial_config_port(struct uart_port *port, int flags) { … } static int ma35d1serial_verify_port(struct uart_port *port, struct serial_struct *ser) { … } static const struct uart_ops ma35d1serial_ops = …; static const struct of_device_id ma35d1_serial_of_match[] = …; MODULE_DEVICE_TABLE(of, ma35d1_serial_of_match); #ifdef CONFIG_SERIAL_NUVOTON_MA35D1_CONSOLE static struct device_node *ma35d1serial_uart_nodes[MA35_UART_NR]; static void wait_for_xmitr(struct uart_ma35d1_port *up) { … } static void ma35d1serial_console_putchar(struct uart_port *port, unsigned char ch) { … } /* * Print a string to the serial port trying not to disturb * any possible real use of the port... * * The console_lock must be held when we get here. */ static void ma35d1serial_console_write(struct console *co, const char *s, u32 count) { … } static int __init ma35d1serial_console_setup(struct console *co, char *options) { … } static struct console ma35d1serial_console = …; static void ma35d1serial_console_init_port(void) { … } static int __init ma35d1serial_console_init(void) { … } console_initcall(ma35d1serial_console_init); #define MA35D1SERIAL_CONSOLE … #else #define MA35D1SERIAL_CONSOLE … #endif static struct uart_driver ma35d1serial_reg = …; /* * Register a set of serial devices attached to a platform device. * The list is terminated with a zero flags entry, which means we expect * all entries to have at least UPF_BOOT_AUTOCONF set. */ static int ma35d1serial_probe(struct platform_device *pdev) { … } /* * Remove serial ports registered against a platform device. */ static void ma35d1serial_remove(struct platform_device *dev) { … } static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state) { … } static int ma35d1serial_resume(struct platform_device *dev) { … } static struct platform_driver ma35d1serial_driver = …; static int __init ma35d1serial_init(void) { … } static void __exit ma35d1serial_exit(void) { … } module_init(…) …; module_exit(ma35d1serial_exit); MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …;
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