// SPDX-License-Identifier: GPL-2.0+ /* * Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver * * Copyright (C) 2012-2016 Alexander Shiyan <[email protected]> * * Based on max3100.c, by Christian Pellegrin <[email protected]> * Based on max3110.c, by Feng Tang <[email protected]> * Based on max3107.c, by Aavamobile */ #include <linux/bitops.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/gpio/driver.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/serial_core.h> #include <linux/serial.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/spi/spi.h> #include <linux/uaccess.h> #define MAX310X_NAME … #define MAX310X_MAJOR … #define MAX310X_MINOR … #define MAX310X_UART_NRMAX … #define MAX310X_MAX_PORTS … /* MAX310X register definitions */ #define MAX310X_RHR_REG … #define MAX310X_THR_REG … #define MAX310X_IRQEN_REG … #define MAX310X_IRQSTS_REG … #define MAX310X_LSR_IRQEN_REG … #define MAX310X_LSR_IRQSTS_REG … #define MAX310X_REG_05 … #define MAX310X_SPCHR_IRQEN_REG … #define MAX310X_SPCHR_IRQSTS_REG … #define MAX310X_STS_IRQEN_REG … #define MAX310X_STS_IRQSTS_REG … #define MAX310X_MODE1_REG … #define MAX310X_MODE2_REG … #define MAX310X_LCR_REG … #define MAX310X_RXTO_REG … #define MAX310X_HDPIXDELAY_REG … #define MAX310X_IRDA_REG … #define MAX310X_FLOWLVL_REG … #define MAX310X_FIFOTRIGLVL_REG … #define MAX310X_TXFIFOLVL_REG … #define MAX310X_RXFIFOLVL_REG … #define MAX310X_FLOWCTRL_REG … #define MAX310X_XON1_REG … #define MAX310X_XON2_REG … #define MAX310X_XOFF1_REG … #define MAX310X_XOFF2_REG … #define MAX310X_GPIOCFG_REG … #define MAX310X_GPIODATA_REG … #define MAX310X_PLLCFG_REG … #define MAX310X_BRGCFG_REG … #define MAX310X_BRGDIVLSB_REG … #define MAX310X_BRGDIVMSB_REG … #define MAX310X_CLKSRC_REG … #define MAX310X_REG_1F … #define MAX310X_EXTREG_START … #define MAX310X_REVID_REG … #define MAX310X_GLOBALIRQ_REG … #define MAX310X_GLOBALCMD_REG … /* Extended registers */ #define MAX310X_REVID_EXTREG … /* IRQ register bits */ #define MAX310X_IRQ_LSR_BIT … #define MAX310X_IRQ_SPCHR_BIT … #define MAX310X_IRQ_STS_BIT … #define MAX310X_IRQ_RXFIFO_BIT … #define MAX310X_IRQ_TXFIFO_BIT … #define MAX310X_IRQ_TXEMPTY_BIT … #define MAX310X_IRQ_RXEMPTY_BIT … #define MAX310X_IRQ_CTS_BIT … /* LSR register bits */ #define MAX310X_LSR_RXTO_BIT … #define MAX310X_LSR_RXOVR_BIT … #define MAX310X_LSR_RXPAR_BIT … #define MAX310X_LSR_FRERR_BIT … #define MAX310X_LSR_RXBRK_BIT … #define MAX310X_LSR_RXNOISE_BIT … #define MAX310X_LSR_CTS_BIT … /* Special character register bits */ #define MAX310X_SPCHR_XON1_BIT … #define MAX310X_SPCHR_XON2_BIT … #define MAX310X_SPCHR_XOFF1_BIT … #define MAX310X_SPCHR_XOFF2_BIT … #define MAX310X_SPCHR_BREAK_BIT … #define MAX310X_SPCHR_MULTIDROP_BIT … /* Status register bits */ #define MAX310X_STS_GPIO0_BIT … #define MAX310X_STS_GPIO1_BIT … #define MAX310X_STS_GPIO2_BIT … #define MAX310X_STS_GPIO3_BIT … #define MAX310X_STS_CLKREADY_BIT … #define MAX310X_STS_SLEEP_BIT … /* MODE1 register bits */ #define MAX310X_MODE1_RXDIS_BIT … #define MAX310X_MODE1_TXDIS_BIT … #define MAX310X_MODE1_TXHIZ_BIT … #define MAX310X_MODE1_RTSHIZ_BIT … #define MAX310X_MODE1_TRNSCVCTRL_BIT … #define MAX310X_MODE1_FORCESLEEP_BIT … #define MAX310X_MODE1_AUTOSLEEP_BIT … #define MAX310X_MODE1_IRQSEL_BIT … /* MODE2 register bits */ #define MAX310X_MODE2_RST_BIT … #define MAX310X_MODE2_FIFORST_BIT … #define MAX310X_MODE2_RXTRIGINV_BIT … #define MAX310X_MODE2_RXEMPTINV_BIT … #define MAX310X_MODE2_SPCHR_BIT … #define MAX310X_MODE2_LOOPBACK_BIT … #define MAX310X_MODE2_MULTIDROP_BIT … #define MAX310X_MODE2_ECHOSUPR_BIT … /* LCR register bits */ #define MAX310X_LCR_LENGTH0_BIT … #define MAX310X_LCR_LENGTH1_BIT … #define MAX310X_LCR_STOPLEN_BIT … #define MAX310X_LCR_PARITY_BIT … #define MAX310X_LCR_EVENPARITY_BIT … #define MAX310X_LCR_FORCEPARITY_BIT … #define MAX310X_LCR_TXBREAK_BIT … #define MAX310X_LCR_RTS_BIT … /* IRDA register bits */ #define MAX310X_IRDA_IRDAEN_BIT … #define MAX310X_IRDA_SIR_BIT … /* Flow control trigger level register masks */ #define MAX310X_FLOWLVL_HALT_MASK … #define MAX310X_FLOWLVL_RES_MASK … #define MAX310X_FLOWLVL_HALT(words) … #define MAX310X_FLOWLVL_RES(words) … /* FIFO interrupt trigger level register masks */ #define MAX310X_FIFOTRIGLVL_TX_MASK … #define MAX310X_FIFOTRIGLVL_RX_MASK … #define MAX310X_FIFOTRIGLVL_TX(words) … #define MAX310X_FIFOTRIGLVL_RX(words) … /* Flow control register bits */ #define MAX310X_FLOWCTRL_AUTORTS_BIT … #define MAX310X_FLOWCTRL_AUTOCTS_BIT … #define MAX310X_FLOWCTRL_GPIADDR_BIT … #define MAX310X_FLOWCTRL_SWFLOWEN_BIT … #define MAX310X_FLOWCTRL_SWFLOW0_BIT … #define MAX310X_FLOWCTRL_SWFLOW1_BIT … #define MAX310X_FLOWCTRL_SWFLOW2_BIT … #define MAX310X_FLOWCTRL_SWFLOW3_BIT … /* PLL configuration register masks */ #define MAX310X_PLLCFG_PREDIV_MASK … #define MAX310X_PLLCFG_PLLFACTOR_MASK … /* Baud rate generator configuration register bits */ #define MAX310X_BRGCFG_2XMODE_BIT … #define MAX310X_BRGCFG_4XMODE_BIT … /* Clock source register bits */ #define MAX310X_CLKSRC_CRYST_BIT … #define MAX310X_CLKSRC_PLL_BIT … #define MAX310X_CLKSRC_PLLBYP_BIT … #define MAX310X_CLKSRC_EXTCLK_BIT … #define MAX310X_CLKSRC_CLK2RTS_BIT … /* Global commands */ #define MAX310X_EXTREG_ENBL … #define MAX310X_EXTREG_DSBL … /* Misc definitions */ #define MAX310X_FIFO_SIZE … #define MAX310x_REV_MASK … #define MAX310X_WRITE_BIT … /* Port startup definitions */ #define MAX310X_PORT_STARTUP_WAIT_RETRIES … #define MAX310X_PORT_STARTUP_WAIT_DELAY_MS … /* Crystal-related definitions */ #define MAX310X_XTAL_WAIT_RETRIES … #define MAX310X_XTAL_WAIT_DELAY_MS … /* MAX3107 specific */ #define MAX3107_REV_ID … /* MAX3109 specific */ #define MAX3109_REV_ID … /* MAX14830 specific */ #define MAX14830_BRGCFG_CLKDIS_BIT … #define MAX14830_REV_ID … struct max310x_if_cfg { … }; struct max310x_devtype { … }; struct max310x_one { … }; #define to_max310x_port(_port) … struct max310x_port { … }; static struct uart_driver max310x_uart = …; static DECLARE_BITMAP(max310x_lines, MAX310X_UART_NRMAX); static u8 max310x_port_read(struct uart_port *port, u8 reg) { … } static void max310x_port_write(struct uart_port *port, u8 reg, u8 val) { … } static void max310x_port_update(struct uart_port *port, u8 reg, u8 mask, u8 val) { … } static int max310x_detect(struct device *dev) { … } static void max310x_power(struct uart_port *port, int on) { … } static const struct max310x_devtype max3107_devtype = …; static const struct max310x_devtype max3108_devtype = …; static const struct max310x_devtype max3109_devtype = …; static const struct max310x_devtype max14830_devtype = …; static bool max310x_reg_writeable(struct device *dev, unsigned int reg) { … } static bool max310x_reg_volatile(struct device *dev, unsigned int reg) { … } static bool max310x_reg_precious(struct device *dev, unsigned int reg) { … } static bool max310x_reg_noinc(struct device *dev, unsigned int reg) { … } static int max310x_set_baud(struct uart_port *port, int baud) { … } static int max310x_update_best_err(unsigned long f, long *besterr) { … } static s32 max310x_set_ref_clk(struct device *dev, struct max310x_port *s, unsigned long freq, bool xtal) { … } static void max310x_batch_write(struct uart_port *port, u8 *txbuf, unsigned int len) { … } static void max310x_batch_read(struct uart_port *port, u8 *rxbuf, unsigned int len) { … } static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) { … } static void max310x_handle_tx(struct uart_port *port) { … } static void max310x_start_tx(struct uart_port *port) { … } static irqreturn_t max310x_port_irq(struct max310x_port *s, int portno) { … } static irqreturn_t max310x_ist(int irq, void *dev_id) { … } static void max310x_tx_proc(struct work_struct *ws) { … } static unsigned int max310x_tx_empty(struct uart_port *port) { … } static unsigned int max310x_get_mctrl(struct uart_port *port) { … } static void max310x_md_proc(struct work_struct *ws) { … } static void max310x_set_mctrl(struct uart_port *port, unsigned int mctrl) { … } static void max310x_break_ctl(struct uart_port *port, int break_state) { … } static void max310x_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static void max310x_rs_proc(struct work_struct *ws) { … } static int max310x_rs485_config(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485) { … } static int max310x_startup(struct uart_port *port) { … } static void max310x_shutdown(struct uart_port *port) { … } static const char *max310x_type(struct uart_port *port) { … } static int max310x_request_port(struct uart_port *port) { … } static void max310x_config_port(struct uart_port *port, int flags) { … } static int max310x_verify_port(struct uart_port *port, struct serial_struct *s) { … } static void max310x_null_void(struct uart_port *port) { … } static const struct uart_ops max310x_ops = …; static int __maybe_unused max310x_suspend(struct device *dev) { … } static int __maybe_unused max310x_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume); #ifdef CONFIG_GPIOLIB static int max310x_gpio_get(struct gpio_chip *chip, unsigned int offset) { … } static void max310x_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { … } static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) { … } static int max310x_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int value) { … } static int max310x_gpio_set_config(struct gpio_chip *chip, unsigned int offset, unsigned long config) { … } #endif static const struct serial_rs485 max310x_rs485_supported = …; static int max310x_probe(struct device *dev, const struct max310x_devtype *devtype, const struct max310x_if_cfg *if_cfg, struct regmap *regmaps[], int irq) { … } static void max310x_remove(struct device *dev) { … } static const struct of_device_id __maybe_unused max310x_dt_ids[] = …; MODULE_DEVICE_TABLE(of, max310x_dt_ids); static struct regmap_config regcfg = …; static const char *max310x_regmap_name(u8 port_id) { … } #ifdef CONFIG_SPI_MASTER static int max310x_spi_extended_reg_enable(struct device *dev, bool enable) { … } static const struct max310x_if_cfg __maybe_unused max310x_spi_if_cfg = …; static int max310x_spi_probe(struct spi_device *spi) { … } static void max310x_spi_remove(struct spi_device *spi) { … } static const struct spi_device_id max310x_id_table[] = …; MODULE_DEVICE_TABLE(spi, max310x_id_table); static struct spi_driver max310x_spi_driver = …; #endif #ifdef CONFIG_I2C static int max310x_i2c_extended_reg_enable(struct device *dev, bool enable) { … } static struct regmap_config regcfg_i2c = …; static const struct max310x_if_cfg max310x_i2c_if_cfg = …; static unsigned short max310x_i2c_slave_addr(unsigned short addr, unsigned int nr) { … } static int max310x_i2c_probe(struct i2c_client *client) { … } static void max310x_i2c_remove(struct i2c_client *client) { … } static const struct i2c_device_id max310x_i2c_id_table[] = …; MODULE_DEVICE_TABLE(i2c, max310x_i2c_id_table); static struct i2c_driver max310x_i2c_driver = …; #endif static int __init max310x_uart_init(void) { … } module_init(…) …; static void __exit max310x_uart_exit(void) { … } module_exit(max310x_uart_exit); MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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