// SPDX-License-Identifier: GPL-2.0 /* * Driver for msm7k serial device and console * * Copyright (C) 2007 Google, Inc. * Author: Robert Love <[email protected]> * Copyright (c) 2011, Code Aurora Forum. All rights reserved. */ #include <linux/kernel.h> #include <linux/atomic.h> #include <linux/dma/qcom_adm.h> #include <linux/dma-mapping.h> #include <linux/dmaengine.h> #include <linux/module.h> #include <linux/io.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/console.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial_core.h> #include <linux/slab.h> #include <linux/clk.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> #include <linux/delay.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/wait.h> #define MSM_UART_MR1 … #define MSM_UART_MR1_AUTO_RFR_LEVEL0 … #define MSM_UART_MR1_AUTO_RFR_LEVEL1 … #define MSM_UART_DM_MR1_AUTO_RFR_LEVEL1 … #define MSM_UART_MR1_RX_RDY_CTL … #define MSM_UART_MR1_CTS_CTL … #define MSM_UART_MR2 … #define MSM_UART_MR2_ERROR_MODE … #define MSM_UART_MR2_BITS_PER_CHAR … #define MSM_UART_MR2_BITS_PER_CHAR_5 … #define MSM_UART_MR2_BITS_PER_CHAR_6 … #define MSM_UART_MR2_BITS_PER_CHAR_7 … #define MSM_UART_MR2_BITS_PER_CHAR_8 … #define MSM_UART_MR2_STOP_BIT_LEN_ONE … #define MSM_UART_MR2_STOP_BIT_LEN_TWO … #define MSM_UART_MR2_PARITY_MODE_NONE … #define MSM_UART_MR2_PARITY_MODE_ODD … #define MSM_UART_MR2_PARITY_MODE_EVEN … #define MSM_UART_MR2_PARITY_MODE_SPACE … #define MSM_UART_MR2_PARITY_MODE … #define MSM_UART_CSR … #define MSM_UART_TF … #define UARTDM_TF … #define MSM_UART_CR … #define MSM_UART_CR_CMD_NULL … #define MSM_UART_CR_CMD_RESET_RX … #define MSM_UART_CR_CMD_RESET_TX … #define MSM_UART_CR_CMD_RESET_ERR … #define MSM_UART_CR_CMD_RESET_BREAK_INT … #define MSM_UART_CR_CMD_START_BREAK … #define MSM_UART_CR_CMD_STOP_BREAK … #define MSM_UART_CR_CMD_RESET_CTS … #define MSM_UART_CR_CMD_RESET_STALE_INT … #define MSM_UART_CR_CMD_PACKET_MODE … #define MSM_UART_CR_CMD_MODE_RESET … #define MSM_UART_CR_CMD_SET_RFR … #define MSM_UART_CR_CMD_RESET_RFR … #define MSM_UART_CR_CMD_PROTECTION_EN … #define MSM_UART_CR_CMD_STALE_EVENT_DISABLE … #define MSM_UART_CR_CMD_STALE_EVENT_ENABLE … #define MSM_UART_CR_CMD_FORCE_STALE … #define MSM_UART_CR_CMD_RESET_TX_READY … #define MSM_UART_CR_TX_DISABLE … #define MSM_UART_CR_TX_ENABLE … #define MSM_UART_CR_RX_DISABLE … #define MSM_UART_CR_RX_ENABLE … #define MSM_UART_CR_CMD_RESET_RXBREAK_START … #define MSM_UART_IMR … #define MSM_UART_IMR_TXLEV … #define MSM_UART_IMR_RXSTALE … #define MSM_UART_IMR_RXLEV … #define MSM_UART_IMR_DELTA_CTS … #define MSM_UART_IMR_CURRENT_CTS … #define MSM_UART_IMR_RXBREAK_START … #define MSM_UART_IPR_RXSTALE_LAST … #define MSM_UART_IPR_STALE_LSB … #define MSM_UART_IPR_STALE_TIMEOUT_MSB … #define MSM_UART_DM_IPR_STALE_TIMEOUT_MSB … #define MSM_UART_IPR … #define MSM_UART_TFWR … #define MSM_UART_RFWR … #define MSM_UART_HCR … #define MSM_UART_MREG … #define MSM_UART_NREG … #define MSM_UART_DREG … #define MSM_UART_MNDREG … #define MSM_UART_IRDA … #define MSM_UART_MISR_MODE … #define MSM_UART_MISR_RESET … #define MSM_UART_MISR_EXPORT … #define MSM_UART_MISR_VAL … #define MSM_UART_TEST_CTRL … #define MSM_UART_SR … #define MSM_UART_SR_HUNT_CHAR … #define MSM_UART_SR_RX_BREAK … #define MSM_UART_SR_PAR_FRAME_ERR … #define MSM_UART_SR_OVERRUN … #define MSM_UART_SR_TX_EMPTY … #define MSM_UART_SR_TX_READY … #define MSM_UART_SR_RX_FULL … #define MSM_UART_SR_RX_READY … #define MSM_UART_RF … #define UARTDM_RF … #define MSM_UART_MISR … #define MSM_UART_ISR … #define MSM_UART_ISR_TX_READY … #define UARTDM_RXFS … #define UARTDM_RXFS_BUF_SHIFT … #define UARTDM_RXFS_BUF_MASK … #define UARTDM_DMEN … #define UARTDM_DMEN_RX_SC_ENABLE … #define UARTDM_DMEN_TX_SC_ENABLE … #define UARTDM_DMEN_TX_BAM_ENABLE … #define UARTDM_DMEN_TX_DM_ENABLE … #define UARTDM_DMEN_RX_BAM_ENABLE … #define UARTDM_DMEN_RX_DM_ENABLE … #define UARTDM_DMRX … #define UARTDM_NCF_TX … #define UARTDM_RX_TOTAL_SNAP … #define UARTDM_BURST_SIZE … #define UARTDM_TX_AIGN(x) … #define UARTDM_TX_MAX … #define UARTDM_RX_SIZE … enum { … }; struct msm_dma { … }; struct msm_port { … }; static inline struct msm_port *to_msm_port(struct uart_port *up) { … } static void msm_write(struct uart_port *port, unsigned int val, unsigned int off) { … } static unsigned int msm_read(struct uart_port *port, unsigned int off) { … } /* * Setup the MND registers to use the TCXO clock. */ static void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) { … } /* * Setup the MND registers to use the TCXO clock divided by 4. */ static void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port) { … } static void msm_serial_set_mnd_regs(struct uart_port *port) { … } static void msm_handle_tx(struct uart_port *port); static void msm_start_rx_dma(struct msm_port *msm_port); static void msm_stop_dma(struct uart_port *port, struct msm_dma *dma) { … } static void msm_release_dma(struct msm_port *msm_port) { … } static void msm_request_tx_dma(struct msm_port *msm_port, resource_size_t base) { … } static void msm_request_rx_dma(struct msm_port *msm_port, resource_size_t base) { … } static inline void msm_wait_for_xmitr(struct uart_port *port) { … } static void msm_stop_tx(struct uart_port *port) { … } static void msm_start_tx(struct uart_port *port) { … } static void msm_reset_dm_count(struct uart_port *port, int count) { … } static void msm_complete_tx_dma(void *args) { … } static int msm_handle_tx_dma(struct msm_port *msm_port, unsigned int count) { … } static void msm_complete_rx_dma(void *args) { … } static void msm_start_rx_dma(struct msm_port *msm_port) { … } static void msm_stop_rx(struct uart_port *port) { … } static void msm_enable_ms(struct uart_port *port) { … } static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr) __must_hold(&port->lock) { … } static void msm_handle_rx(struct uart_port *port) __must_hold(&port->lock) { … } static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count) { … } static void msm_handle_tx(struct uart_port *port) { … } static void msm_handle_delta_cts(struct uart_port *port) { … } static irqreturn_t msm_uart_irq(int irq, void *dev_id) { … } static unsigned int msm_tx_empty(struct uart_port *port) { … } static unsigned int msm_get_mctrl(struct uart_port *port) { … } static void msm_reset(struct uart_port *port) { … } static void msm_set_mctrl(struct uart_port *port, unsigned int mctrl) { … } static void msm_break_ctl(struct uart_port *port, int break_ctl) { … } struct msm_baud_map { … }; static const struct msm_baud_map * msm_find_best_baud(struct uart_port *port, unsigned int baud, unsigned long *rate) { … } static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, unsigned long *saved_flags) __must_hold(&port->lock) { … } static void msm_init_clock(struct uart_port *port) { … } static int msm_startup(struct uart_port *port) { … } static void msm_shutdown(struct uart_port *port) { … } static void msm_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static const char *msm_type(struct uart_port *port) { … } static void msm_release_port(struct uart_port *port) { … } static int msm_request_port(struct uart_port *port) { … } static void msm_config_port(struct uart_port *port, int flags) { … } static int msm_verify_port(struct uart_port *port, struct serial_struct *ser) { … } static void msm_power(struct uart_port *port, unsigned int state, unsigned int oldstate) { … } #ifdef CONFIG_CONSOLE_POLL static int msm_poll_get_char_single(struct uart_port *port) { … } static int msm_poll_get_char_dm(struct uart_port *port) { … } static int msm_poll_get_char(struct uart_port *port) { … } static void msm_poll_put_char(struct uart_port *port, unsigned char c) { … } #endif static const struct uart_ops msm_uart_pops = …; static struct msm_port msm_uart_ports[] = …; #define MSM_UART_NR … static inline struct uart_port *msm_get_port_from_line(unsigned int line) { … } #ifdef CONFIG_SERIAL_MSM_CONSOLE static void __msm_console_write(struct uart_port *port, const char *s, unsigned int count, bool is_uartdm) { … } static void msm_console_write(struct console *co, const char *s, unsigned int count) { … } static int msm_console_setup(struct console *co, char *options) { … } static void msm_serial_early_write(struct console *con, const char *s, unsigned n) { … } static int __init msm_serial_early_console_setup(struct earlycon_device *device, const char *opt) { … } OF_EARLYCON_DECLARE(…); static void msm_serial_early_write_dm(struct console *con, const char *s, unsigned n) { … } static int __init msm_serial_early_console_setup_dm(struct earlycon_device *device, const char *opt) { … } OF_EARLYCON_DECLARE(…); static struct uart_driver msm_uart_driver; static struct console msm_console = …; #define MSM_CONSOLE … #else #define MSM_CONSOLE … #endif static struct uart_driver msm_uart_driver = …; static atomic_t msm_uart_next_id = …; static const struct of_device_id msm_uartdm_table[] = …; static int msm_serial_probe(struct platform_device *pdev) { … } static void msm_serial_remove(struct platform_device *pdev) { … } static const struct of_device_id msm_match_table[] = …; MODULE_DEVICE_TABLE(of, msm_match_table); static int __maybe_unused msm_serial_suspend(struct device *dev) { … } static int __maybe_unused msm_serial_resume(struct device *dev) { … } static const struct dev_pm_ops msm_serial_dev_pm_ops = …; static struct platform_driver msm_platform_driver = …; static int __init msm_serial_init(void) { … } static void __exit msm_serial_exit(void) { … } module_init(…) …; module_exit(msm_serial_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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