mirror of https://gitee.com/openkylin/linux.git
serial: stm32: add "_usart" prefix in functions name
Adds the prefix "_usart" in the name of stm32 usart functions in order to ease the usage of kernel trace and tools, such as f-trace. Allows to trace "stm32_usart_*" functions with f-trace. Without this patch, all the driver functions needs to be added manually in f-trace filter. Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com> Signed-off-by: Valentin Caron <valentin.caron@foss.st.com> Link: https://lore.kernel.org/r/20210106162203.28854-4-erwan.leray@foss.st.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Erwan Le Ray
Greg Kroah-Hartman
parent
92fc002386
commit
56f9a76c27
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@ -34,15 +34,15 @@
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#include "serial_mctrl_gpio.h"
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#include "stm32-usart.h"
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static void stm32_stop_tx(struct uart_port *port);
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static void stm32_transmit_chars(struct uart_port *port);
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static void stm32_usart_stop_tx(struct uart_port *port);
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static void stm32_usart_transmit_chars(struct uart_port *port);
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static inline struct stm32_port *to_stm32_port(struct uart_port *port)
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{
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return container_of(port, struct stm32_port, port);
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}
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static void stm32_set_bits(struct uart_port *port, u32 reg, u32 bits)
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static void stm32_usart_set_bits(struct uart_port *port, u32 reg, u32 bits)
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{
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u32 val;
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@ -51,7 +51,7 @@ static void stm32_set_bits(struct uart_port *port, u32 reg, u32 bits)
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writel_relaxed(val, port->membase + reg);
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}
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static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits)
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static void stm32_usart_clr_bits(struct uart_port *port, u32 reg, u32 bits)
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{
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u32 val;
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@ -60,7 +60,7 @@ static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits)
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writel_relaxed(val, port->membase + reg);
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}
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static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
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static void stm32_usart_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
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u32 delay_DDE, u32 baud)
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{
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u32 rs485_deat_dedt;
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@ -95,7 +95,7 @@ static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
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*cr1 |= rs485_deat_dedt;
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}
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static int stm32_config_rs485(struct uart_port *port,
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static int stm32_usart_config_rs485(struct uart_port *port,
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struct serial_rs485 *rs485conf)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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@ -104,7 +104,7 @@ static int stm32_config_rs485(struct uart_port *port,
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u32 usartdiv, baud, cr1, cr3;
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bool over8;
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stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
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stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
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port->rs485 = *rs485conf;
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@ -122,9 +122,10 @@ static int stm32_config_rs485(struct uart_port *port,
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<< USART_BRR_04_R_SHIFT;
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baud = DIV_ROUND_CLOSEST(port->uartclk, usartdiv);
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stm32_config_reg_rs485(&cr1, &cr3,
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stm32_usart_config_reg_rs485(&cr1, &cr3,
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rs485conf->delay_rts_before_send,
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rs485conf->delay_rts_after_send, baud);
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rs485conf->delay_rts_after_send,
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baud);
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if (rs485conf->flags & SER_RS485_RTS_ON_SEND) {
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cr3 &= ~USART_CR3_DEP;
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@ -137,17 +138,18 @@ static int stm32_config_rs485(struct uart_port *port,
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writel_relaxed(cr3, port->membase + ofs->cr3);
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writel_relaxed(cr1, port->membase + ofs->cr1);
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} else {
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stm32_clr_bits(port, ofs->cr3, USART_CR3_DEM | USART_CR3_DEP);
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stm32_clr_bits(port, ofs->cr1,
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stm32_usart_clr_bits(port, ofs->cr3,
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USART_CR3_DEM | USART_CR3_DEP);
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stm32_usart_clr_bits(port, ofs->cr1,
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USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK);
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}
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stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
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stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
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return 0;
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}
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static int stm32_init_rs485(struct uart_port *port,
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static int stm32_usart_init_rs485(struct uart_port *port,
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struct platform_device *pdev)
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{
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struct serial_rs485 *rs485conf = &port->rs485;
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@ -162,8 +164,8 @@ static int stm32_init_rs485(struct uart_port *port,
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return uart_get_rs485_mode(port);
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}
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static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
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bool threaded)
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static int stm32_usart_pending_rx(struct uart_port *port, u32 *sr,
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int *last_res, bool threaded)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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@ -186,7 +188,7 @@ static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
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return 0;
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}
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static unsigned long stm32_get_char(struct uart_port *port, u32 *sr,
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static unsigned long stm32_usart_get_char(struct uart_port *port, u32 *sr,
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int *last_res)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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@ -206,7 +208,7 @@ static unsigned long stm32_get_char(struct uart_port *port, u32 *sr,
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return c;
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}
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static void stm32_receive_chars(struct uart_port *port, bool threaded)
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static void stm32_usart_receive_chars(struct uart_port *port, bool threaded)
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{
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struct tty_port *tport = &port->state->port;
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struct stm32_port *stm32_port = to_stm32_port(port);
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@ -218,7 +220,8 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
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if (irqd_is_wakeup_set(irq_get_irq_data(port->irq)))
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pm_wakeup_event(tport->tty->dev, 0);
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while (stm32_pending_rx(port, &sr, &stm32_port->last_res, threaded)) {
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while (stm32_usart_pending_rx(port, &sr, &stm32_port->last_res,
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threaded)) {
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sr |= USART_SR_DUMMY_RX;
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flag = TTY_NORMAL;
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@ -237,7 +240,7 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
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writel_relaxed(sr & USART_SR_ERR_MASK,
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port->membase + ofs->icr);
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c = stm32_get_char(port, &sr, &stm32_port->last_res);
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c = stm32_usart_get_char(port, &sr, &stm32_port->last_res);
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port->icount.rx++;
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if (sr & USART_SR_ERR_MASK) {
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if (sr & USART_SR_ORE) {
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@ -277,20 +280,20 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
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spin_lock(&port->lock);
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}
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static void stm32_tx_dma_complete(void *arg)
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static void stm32_usart_tx_dma_complete(void *arg)
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{
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struct uart_port *port = arg;
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struct stm32_port *stm32port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
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stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32port->tx_dma_busy = false;
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/* Let's see if we have pending data to send */
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stm32_transmit_chars(port);
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stm32_usart_transmit_chars(port);
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}
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static void stm32_tx_interrupt_enable(struct uart_port *port)
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static void stm32_usart_tx_interrupt_enable(struct uart_port *port)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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@ -300,30 +303,30 @@ static void stm32_tx_interrupt_enable(struct uart_port *port)
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* or TX empty irq when FIFO is disabled
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*/
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if (stm32_port->fifoen)
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stm32_set_bits(port, ofs->cr3, USART_CR3_TXFTIE);
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stm32_usart_set_bits(port, ofs->cr3, USART_CR3_TXFTIE);
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else
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stm32_set_bits(port, ofs->cr1, USART_CR1_TXEIE);
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stm32_usart_set_bits(port, ofs->cr1, USART_CR1_TXEIE);
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}
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static void stm32_tx_interrupt_disable(struct uart_port *port)
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static void stm32_usart_tx_interrupt_disable(struct uart_port *port)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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if (stm32_port->fifoen)
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stm32_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE);
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stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE);
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else
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stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE);
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stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_TXEIE);
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}
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static void stm32_transmit_chars_pio(struct uart_port *port)
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static void stm32_usart_transmit_chars_pio(struct uart_port *port)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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struct circ_buf *xmit = &port->state->xmit;
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if (stm32_port->tx_dma_busy) {
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stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32_port->tx_dma_busy = false;
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}
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@ -338,12 +341,12 @@ static void stm32_transmit_chars_pio(struct uart_port *port)
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/* rely on TXE irq (mask or unmask) for sending remaining data */
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if (uart_circ_empty(xmit))
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stm32_tx_interrupt_disable(port);
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stm32_usart_tx_interrupt_disable(port);
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else
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stm32_tx_interrupt_enable(port);
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stm32_usart_tx_interrupt_enable(port);
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}
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static void stm32_transmit_chars_dma(struct uart_port *port)
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static void stm32_usart_transmit_chars_dma(struct uart_port *port)
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{
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struct stm32_port *stm32port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
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@ -385,7 +388,7 @@ static void stm32_transmit_chars_dma(struct uart_port *port)
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if (!desc)
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goto fallback_err;
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desc->callback = stm32_tx_dma_complete;
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desc->callback = stm32_usart_tx_dma_complete;
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desc->callback_param = port;
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/* Push current DMA TX transaction in the pending queue */
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@ -398,7 +401,7 @@ static void stm32_transmit_chars_dma(struct uart_port *port)
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/* Issue pending DMA TX requests */
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dma_async_issue_pending(stm32port->tx_ch);
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stm32_set_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32_usart_set_bits(port, ofs->cr3, USART_CR3_DMAT);
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xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
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port->icount.tx += count;
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@ -406,10 +409,10 @@ static void stm32_transmit_chars_dma(struct uart_port *port)
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fallback_err:
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for (i = count; i > 0; i--)
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stm32_transmit_chars_pio(port);
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stm32_usart_transmit_chars_pio(port);
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}
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static void stm32_transmit_chars(struct uart_port *port)
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static void stm32_usart_transmit_chars(struct uart_port *port)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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@ -417,38 +420,38 @@ static void stm32_transmit_chars(struct uart_port *port)
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if (port->x_char) {
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if (stm32_port->tx_dma_busy)
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stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
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writel_relaxed(port->x_char, port->membase + ofs->tdr);
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port->x_char = 0;
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port->icount.tx++;
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if (stm32_port->tx_dma_busy)
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stm32_set_bits(port, ofs->cr3, USART_CR3_DMAT);
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stm32_usart_set_bits(port, ofs->cr3, USART_CR3_DMAT);
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return;
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}
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if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
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stm32_tx_interrupt_disable(port);
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stm32_usart_tx_interrupt_disable(port);
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return;
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}
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if (ofs->icr == UNDEF_REG)
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stm32_clr_bits(port, ofs->isr, USART_SR_TC);
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stm32_usart_clr_bits(port, ofs->isr, USART_SR_TC);
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else
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writel_relaxed(USART_ICR_TCCF, port->membase + ofs->icr);
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if (stm32_port->tx_ch)
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stm32_transmit_chars_dma(port);
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stm32_usart_transmit_chars_dma(port);
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else
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stm32_transmit_chars_pio(port);
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stm32_usart_transmit_chars_pio(port);
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(port);
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if (uart_circ_empty(xmit))
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stm32_tx_interrupt_disable(port);
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stm32_usart_tx_interrupt_disable(port);
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}
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static irqreturn_t stm32_interrupt(int irq, void *ptr)
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static irqreturn_t stm32_usart_interrupt(int irq, void *ptr)
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{
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struct uart_port *port = ptr;
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struct stm32_port *stm32_port = to_stm32_port(port);
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@ -468,10 +471,10 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
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port->membase + ofs->icr);
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if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))
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stm32_receive_chars(port, false);
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stm32_usart_receive_chars(port, false);
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if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch))
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stm32_transmit_chars(port);
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stm32_usart_transmit_chars(port);
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spin_unlock(&port->lock);
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@ -481,7 +484,7 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
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return IRQ_HANDLED;
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}
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static irqreturn_t stm32_threaded_interrupt(int irq, void *ptr)
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static irqreturn_t stm32_usart_threaded_interrupt(int irq, void *ptr)
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{
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struct uart_port *port = ptr;
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struct stm32_port *stm32_port = to_stm32_port(port);
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@ -489,14 +492,14 @@ static irqreturn_t stm32_threaded_interrupt(int irq, void *ptr)
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spin_lock(&port->lock);
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if (stm32_port->rx_ch)
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stm32_receive_chars(port, true);
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stm32_usart_receive_chars(port, true);
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spin_unlock(&port->lock);
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return IRQ_HANDLED;
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}
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static unsigned int stm32_tx_empty(struct uart_port *port)
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static unsigned int stm32_usart_tx_empty(struct uart_port *port)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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@ -504,20 +507,20 @@ static unsigned int stm32_tx_empty(struct uart_port *port)
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return readl_relaxed(port->membase + ofs->isr) & USART_SR_TXE;
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}
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static void stm32_set_mctrl(struct uart_port *port, unsigned int mctrl)
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static void stm32_usart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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struct stm32_port *stm32_port = to_stm32_port(port);
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struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
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stm32_set_bits(port, ofs->cr3, USART_CR3_RTSE);
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stm32_usart_set_bits(port, ofs->cr3, USART_CR3_RTSE);
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else
|
||||
stm32_clr_bits(port, ofs->cr3, USART_CR3_RTSE);
|
||||
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_RTSE);
|
||||
|
||||
mctrl_gpio_set(stm32_port->gpios, mctrl);
|
||||
}
|
||||
|
||||
static unsigned int stm32_get_mctrl(struct uart_port *port)
|
||||
static unsigned int stm32_usart_get_mctrl(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
unsigned int ret;
|
||||
|
|
@ -528,23 +531,23 @@ static unsigned int stm32_get_mctrl(struct uart_port *port)
|
|||
return mctrl_gpio_get(stm32_port->gpios, &ret);
|
||||
}
|
||||
|
||||
static void stm32_enable_ms(struct uart_port *port)
|
||||
static void stm32_usart_enable_ms(struct uart_port *port)
|
||||
{
|
||||
mctrl_gpio_enable_ms(to_stm32_port(port)->gpios);
|
||||
}
|
||||
|
||||
static void stm32_disable_ms(struct uart_port *port)
|
||||
static void stm32_usart_disable_ms(struct uart_port *port)
|
||||
{
|
||||
mctrl_gpio_disable_ms(to_stm32_port(port)->gpios);
|
||||
}
|
||||
|
||||
/* Transmit stop */
|
||||
static void stm32_stop_tx(struct uart_port *port)
|
||||
static void stm32_usart_stop_tx(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct serial_rs485 *rs485conf = &port->rs485;
|
||||
|
||||
stm32_tx_interrupt_disable(port);
|
||||
stm32_usart_tx_interrupt_disable(port);
|
||||
|
||||
if (rs485conf->flags & SER_RS485_ENABLED) {
|
||||
if (rs485conf->flags & SER_RS485_RTS_ON_SEND) {
|
||||
|
|
@ -558,7 +561,7 @@ static void stm32_stop_tx(struct uart_port *port)
|
|||
}
|
||||
|
||||
/* There are probably characters waiting to be transmitted. */
|
||||
static void stm32_start_tx(struct uart_port *port)
|
||||
static void stm32_usart_start_tx(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct serial_rs485 *rs485conf = &port->rs485;
|
||||
|
|
@ -577,56 +580,56 @@ static void stm32_start_tx(struct uart_port *port)
|
|||
}
|
||||
}
|
||||
|
||||
stm32_transmit_chars(port);
|
||||
stm32_usart_transmit_chars(port);
|
||||
}
|
||||
|
||||
/* Throttle the remote when input buffer is about to overflow. */
|
||||
static void stm32_throttle(struct uart_port *port)
|
||||
static void stm32_usart_throttle(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
stm32_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
|
||||
stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
|
||||
if (stm32_port->cr3_irq)
|
||||
stm32_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
|
||||
stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
|
||||
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
}
|
||||
|
||||
/* Unthrottle the remote, the input buffer can now accept data. */
|
||||
static void stm32_unthrottle(struct uart_port *port)
|
||||
static void stm32_usart_unthrottle(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
stm32_set_bits(port, ofs->cr1, stm32_port->cr1_irq);
|
||||
stm32_usart_set_bits(port, ofs->cr1, stm32_port->cr1_irq);
|
||||
if (stm32_port->cr3_irq)
|
||||
stm32_set_bits(port, ofs->cr3, stm32_port->cr3_irq);
|
||||
stm32_usart_set_bits(port, ofs->cr3, stm32_port->cr3_irq);
|
||||
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
}
|
||||
|
||||
/* Receive stop */
|
||||
static void stm32_stop_rx(struct uart_port *port)
|
||||
static void stm32_usart_stop_rx(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
|
||||
|
||||
stm32_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
|
||||
stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
|
||||
if (stm32_port->cr3_irq)
|
||||
stm32_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
|
||||
stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
|
||||
}
|
||||
|
||||
/* Handle breaks - ignored by us */
|
||||
static void stm32_break_ctl(struct uart_port *port, int break_state)
|
||||
static void stm32_usart_break_ctl(struct uart_port *port, int break_state)
|
||||
{
|
||||
}
|
||||
|
||||
static int stm32_startup(struct uart_port *port)
|
||||
static int stm32_usart_startup(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
|
||||
|
|
@ -634,15 +637,15 @@ static int stm32_startup(struct uart_port *port)
|
|||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = request_threaded_irq(port->irq, stm32_interrupt,
|
||||
stm32_threaded_interrupt,
|
||||
ret = request_threaded_irq(port->irq, stm32_usart_interrupt,
|
||||
stm32_usart_threaded_interrupt,
|
||||
IRQF_NO_SUSPEND, name, port);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* RX FIFO Flush */
|
||||
if (ofs->rqr != UNDEF_REG)
|
||||
stm32_set_bits(port, ofs->rqr, USART_RQR_RXFRQ);
|
||||
stm32_usart_set_bits(port, ofs->rqr, USART_RQR_RXFRQ);
|
||||
|
||||
/* Tx and RX FIFO configuration */
|
||||
if (stm32_port->fifoen) {
|
||||
|
|
@ -657,12 +660,12 @@ static int stm32_startup(struct uart_port *port)
|
|||
val = stm32_port->cr1_irq | USART_CR1_RE;
|
||||
if (stm32_port->fifoen)
|
||||
val |= USART_CR1_FIFOEN;
|
||||
stm32_set_bits(port, ofs->cr1, val);
|
||||
stm32_usart_set_bits(port, ofs->cr1, val);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stm32_shutdown(struct uart_port *port)
|
||||
static void stm32_usart_shutdown(struct uart_port *port)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
|
||||
|
|
@ -671,7 +674,7 @@ static void stm32_shutdown(struct uart_port *port)
|
|||
int ret;
|
||||
|
||||
/* Disable modem control interrupts */
|
||||
stm32_disable_ms(port);
|
||||
stm32_usart_disable_ms(port);
|
||||
|
||||
val = USART_CR1_TXEIE | USART_CR1_TE;
|
||||
val |= stm32_port->cr1_irq | USART_CR1_RE;
|
||||
|
|
@ -686,12 +689,12 @@ static void stm32_shutdown(struct uart_port *port)
|
|||
if (ret)
|
||||
dev_err(port->dev, "transmission complete not set\n");
|
||||
|
||||
stm32_clr_bits(port, ofs->cr1, val);
|
||||
stm32_usart_clr_bits(port, ofs->cr1, val);
|
||||
|
||||
free_irq(port->irq, port);
|
||||
}
|
||||
|
||||
static unsigned int stm32_get_databits(struct ktermios *termios)
|
||||
static unsigned int stm32_usart_get_databits(struct ktermios *termios)
|
||||
{
|
||||
unsigned int bits;
|
||||
|
||||
|
|
@ -721,7 +724,8 @@ static unsigned int stm32_get_databits(struct ktermios *termios)
|
|||
return bits;
|
||||
}
|
||||
|
||||
static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
||||
static void stm32_usart_set_termios(struct uart_port *port,
|
||||
struct ktermios *termios,
|
||||
struct ktermios *old)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
|
|
@ -746,7 +750,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
|
||||
/* flush RX & TX FIFO */
|
||||
if (ofs->rqr != UNDEF_REG)
|
||||
stm32_set_bits(port, ofs->rqr,
|
||||
stm32_usart_set_bits(port, ofs->rqr,
|
||||
USART_RQR_TXFRQ | USART_RQR_RXFRQ);
|
||||
|
||||
cr1 = USART_CR1_TE | USART_CR1_RE;
|
||||
|
|
@ -760,7 +764,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
if (cflag & CSTOPB)
|
||||
cr2 |= USART_CR2_STOP_2B;
|
||||
|
||||
bits = stm32_get_databits(termios);
|
||||
bits = stm32_usart_get_databits(termios);
|
||||
stm32_port->rdr_mask = (BIT(bits) - 1);
|
||||
|
||||
if (cflag & PARENB) {
|
||||
|
|
@ -813,9 +817,9 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
|
||||
/* Handle modem control interrupts */
|
||||
if (UART_ENABLE_MS(port, termios->c_cflag))
|
||||
stm32_enable_ms(port);
|
||||
stm32_usart_enable_ms(port);
|
||||
else
|
||||
stm32_disable_ms(port);
|
||||
stm32_usart_disable_ms(port);
|
||||
|
||||
usartdiv = DIV_ROUND_CLOSEST(port->uartclk, baud);
|
||||
|
||||
|
|
@ -828,11 +832,11 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
if (usartdiv < 16) {
|
||||
oversampling = 8;
|
||||
cr1 |= USART_CR1_OVER8;
|
||||
stm32_set_bits(port, ofs->cr1, USART_CR1_OVER8);
|
||||
stm32_usart_set_bits(port, ofs->cr1, USART_CR1_OVER8);
|
||||
} else {
|
||||
oversampling = 16;
|
||||
cr1 &= ~USART_CR1_OVER8;
|
||||
stm32_clr_bits(port, ofs->cr1, USART_CR1_OVER8);
|
||||
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_OVER8);
|
||||
}
|
||||
|
||||
mantissa = (usartdiv / oversampling) << USART_BRR_DIV_M_SHIFT;
|
||||
|
|
@ -869,9 +873,10 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
cr3 |= USART_CR3_DMAR;
|
||||
|
||||
if (rs485conf->flags & SER_RS485_ENABLED) {
|
||||
stm32_config_reg_rs485(&cr1, &cr3,
|
||||
stm32_usart_config_reg_rs485(&cr1, &cr3,
|
||||
rs485conf->delay_rts_before_send,
|
||||
rs485conf->delay_rts_after_send, baud);
|
||||
rs485conf->delay_rts_after_send,
|
||||
baud);
|
||||
if (rs485conf->flags & SER_RS485_RTS_ON_SEND) {
|
||||
cr3 &= ~USART_CR3_DEP;
|
||||
rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND;
|
||||
|
|
@ -889,38 +894,38 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
writel_relaxed(cr2, port->membase + ofs->cr2);
|
||||
writel_relaxed(cr1, port->membase + ofs->cr1);
|
||||
|
||||
stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
}
|
||||
|
||||
static const char *stm32_type(struct uart_port *port)
|
||||
static const char *stm32_usart_type(struct uart_port *port)
|
||||
{
|
||||
return (port->type == PORT_STM32) ? DRIVER_NAME : NULL;
|
||||
}
|
||||
|
||||
static void stm32_release_port(struct uart_port *port)
|
||||
static void stm32_usart_release_port(struct uart_port *port)
|
||||
{
|
||||
}
|
||||
|
||||
static int stm32_request_port(struct uart_port *port)
|
||||
static int stm32_usart_request_port(struct uart_port *port)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stm32_config_port(struct uart_port *port, int flags)
|
||||
static void stm32_usart_config_port(struct uart_port *port, int flags)
|
||||
{
|
||||
if (flags & UART_CONFIG_TYPE)
|
||||
port->type = PORT_STM32;
|
||||
}
|
||||
|
||||
static int
|
||||
stm32_verify_port(struct uart_port *port, struct serial_struct *ser)
|
||||
stm32_usart_verify_port(struct uart_port *port, struct serial_struct *ser)
|
||||
{
|
||||
/* No user changeable parameters */
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static void stm32_pm(struct uart_port *port, unsigned int state,
|
||||
static void stm32_usart_pm(struct uart_port *port, unsigned int state,
|
||||
unsigned int oldstate)
|
||||
{
|
||||
struct stm32_port *stm32port = container_of(port,
|
||||
|
|
@ -935,7 +940,7 @@ static void stm32_pm(struct uart_port *port, unsigned int state,
|
|||
break;
|
||||
case UART_PM_STATE_OFF:
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
pm_runtime_put_sync(port->dev);
|
||||
break;
|
||||
|
|
@ -943,28 +948,28 @@ static void stm32_pm(struct uart_port *port, unsigned int state,
|
|||
}
|
||||
|
||||
static const struct uart_ops stm32_uart_ops = {
|
||||
.tx_empty = stm32_tx_empty,
|
||||
.set_mctrl = stm32_set_mctrl,
|
||||
.get_mctrl = stm32_get_mctrl,
|
||||
.stop_tx = stm32_stop_tx,
|
||||
.start_tx = stm32_start_tx,
|
||||
.throttle = stm32_throttle,
|
||||
.unthrottle = stm32_unthrottle,
|
||||
.stop_rx = stm32_stop_rx,
|
||||
.enable_ms = stm32_enable_ms,
|
||||
.break_ctl = stm32_break_ctl,
|
||||
.startup = stm32_startup,
|
||||
.shutdown = stm32_shutdown,
|
||||
.set_termios = stm32_set_termios,
|
||||
.pm = stm32_pm,
|
||||
.type = stm32_type,
|
||||
.release_port = stm32_release_port,
|
||||
.request_port = stm32_request_port,
|
||||
.config_port = stm32_config_port,
|
||||
.verify_port = stm32_verify_port,
|
||||
.tx_empty = stm32_usart_tx_empty,
|
||||
.set_mctrl = stm32_usart_set_mctrl,
|
||||
.get_mctrl = stm32_usart_get_mctrl,
|
||||
.stop_tx = stm32_usart_stop_tx,
|
||||
.start_tx = stm32_usart_start_tx,
|
||||
.throttle = stm32_usart_throttle,
|
||||
.unthrottle = stm32_usart_unthrottle,
|
||||
.stop_rx = stm32_usart_stop_rx,
|
||||
.enable_ms = stm32_usart_enable_ms,
|
||||
.break_ctl = stm32_usart_break_ctl,
|
||||
.startup = stm32_usart_startup,
|
||||
.shutdown = stm32_usart_shutdown,
|
||||
.set_termios = stm32_usart_set_termios,
|
||||
.pm = stm32_usart_pm,
|
||||
.type = stm32_usart_type,
|
||||
.release_port = stm32_usart_release_port,
|
||||
.request_port = stm32_usart_request_port,
|
||||
.config_port = stm32_usart_config_port,
|
||||
.verify_port = stm32_usart_verify_port,
|
||||
};
|
||||
|
||||
static int stm32_init_port(struct stm32_port *stm32port,
|
||||
static int stm32_usart_init_port(struct stm32_port *stm32port,
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
struct uart_port *port = &stm32port->port;
|
||||
|
|
@ -982,9 +987,9 @@ static int stm32_init_port(struct stm32_port *stm32port,
|
|||
port->fifosize = stm32port->info->cfg.fifosize;
|
||||
port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_STM32_CONSOLE);
|
||||
port->irq = ret;
|
||||
port->rs485_config = stm32_config_rs485;
|
||||
port->rs485_config = stm32_usart_config_rs485;
|
||||
|
||||
ret = stm32_init_rs485(port, pdev);
|
||||
ret = stm32_usart_init_rs485(port, pdev);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
|
@ -1043,7 +1048,7 @@ static int stm32_init_port(struct stm32_port *stm32port,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
|
||||
static struct stm32_port *stm32_usart_of_get_port(struct platform_device *pdev)
|
||||
{
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
int id;
|
||||
|
|
@ -1081,7 +1086,7 @@ static const struct of_device_id stm32_match[] = {
|
|||
MODULE_DEVICE_TABLE(of, stm32_match);
|
||||
#endif
|
||||
|
||||
static int stm32_of_dma_rx_probe(struct stm32_port *stm32port,
|
||||
static int stm32_usart_of_dma_rx_probe(struct stm32_port *stm32port,
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
|
||||
|
|
@ -1156,7 +1161,7 @@ static int stm32_of_dma_rx_probe(struct stm32_port *stm32port,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_of_dma_tx_probe(struct stm32_port *stm32port,
|
||||
static int stm32_usart_of_dma_tx_probe(struct stm32_port *stm32port,
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
|
||||
|
|
@ -1207,13 +1212,13 @@ static int stm32_of_dma_tx_probe(struct stm32_port *stm32port,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_serial_probe(struct platform_device *pdev)
|
||||
static int stm32_usart_serial_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct of_device_id *match;
|
||||
struct stm32_port *stm32port;
|
||||
int ret;
|
||||
|
||||
stm32port = stm32_of_get_stm32_port(pdev);
|
||||
stm32port = stm32_usart_of_get_port(pdev);
|
||||
if (!stm32port)
|
||||
return -ENODEV;
|
||||
|
||||
|
|
@ -1223,7 +1228,7 @@ static int stm32_serial_probe(struct platform_device *pdev)
|
|||
else
|
||||
return -EINVAL;
|
||||
|
||||
ret = stm32_init_port(stm32port, pdev);
|
||||
ret = stm32_usart_init_port(stm32port, pdev);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
|
@ -1244,11 +1249,11 @@ static int stm32_serial_probe(struct platform_device *pdev)
|
|||
if (ret)
|
||||
goto err_wirq;
|
||||
|
||||
ret = stm32_of_dma_rx_probe(stm32port, pdev);
|
||||
ret = stm32_usart_of_dma_rx_probe(stm32port, pdev);
|
||||
if (ret)
|
||||
dev_info(&pdev->dev, "interrupt mode used for rx (no dma)\n");
|
||||
|
||||
ret = stm32_of_dma_tx_probe(stm32port, pdev);
|
||||
ret = stm32_usart_of_dma_tx_probe(stm32port, pdev);
|
||||
if (ret)
|
||||
dev_info(&pdev->dev, "interrupt mode used for tx (no dma)\n");
|
||||
|
||||
|
|
@ -1275,7 +1280,7 @@ static int stm32_serial_probe(struct platform_device *pdev)
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int stm32_serial_remove(struct platform_device *pdev)
|
||||
static int stm32_usart_serial_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct uart_port *port = platform_get_drvdata(pdev);
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
|
|
@ -1284,7 +1289,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
|
|||
|
||||
pm_runtime_get_sync(&pdev->dev);
|
||||
|
||||
stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
|
||||
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
|
||||
|
||||
if (stm32_port->rx_ch)
|
||||
dma_release_channel(stm32_port->rx_ch);
|
||||
|
|
@ -1294,7 +1299,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
|
|||
RX_BUF_L, stm32_port->rx_buf,
|
||||
stm32_port->rx_dma_buf);
|
||||
|
||||
stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
|
||||
stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
|
||||
|
||||
if (stm32_port->tx_ch)
|
||||
dma_release_channel(stm32_port->tx_ch);
|
||||
|
|
@ -1320,7 +1325,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
|
|||
}
|
||||
|
||||
#ifdef CONFIG_SERIAL_STM32_CONSOLE
|
||||
static void stm32_console_putchar(struct uart_port *port, int ch)
|
||||
static void stm32_usart_console_putchar(struct uart_port *port, int ch)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
|
||||
|
|
@ -1331,7 +1336,7 @@ static void stm32_console_putchar(struct uart_port *port, int ch)
|
|||
writel_relaxed(ch, port->membase + ofs->tdr);
|
||||
}
|
||||
|
||||
static void stm32_console_write(struct console *co, const char *s,
|
||||
static void stm32_usart_console_write(struct console *co, const char *s,
|
||||
unsigned int cnt)
|
||||
{
|
||||
struct uart_port *port = &stm32_ports[co->index].port;
|
||||
|
|
@ -1356,7 +1361,7 @@ static void stm32_console_write(struct console *co, const char *s,
|
|||
new_cr1 |= USART_CR1_TE | BIT(cfg->uart_enable_bit);
|
||||
writel_relaxed(new_cr1, port->membase + ofs->cr1);
|
||||
|
||||
uart_console_write(port, s, cnt, stm32_console_putchar);
|
||||
uart_console_write(port, s, cnt, stm32_usart_console_putchar);
|
||||
|
||||
/* Restore interrupt state */
|
||||
writel_relaxed(old_cr1, port->membase + ofs->cr1);
|
||||
|
|
@ -1366,7 +1371,7 @@ static void stm32_console_write(struct console *co, const char *s,
|
|||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
static int stm32_console_setup(struct console *co, char *options)
|
||||
static int stm32_usart_console_setup(struct console *co, char *options)
|
||||
{
|
||||
struct stm32_port *stm32port;
|
||||
int baud = 9600;
|
||||
|
|
@ -1397,8 +1402,8 @@ static int stm32_console_setup(struct console *co, char *options)
|
|||
static struct console stm32_console = {
|
||||
.name = STM32_SERIAL_NAME,
|
||||
.device = uart_console_device,
|
||||
.write = stm32_console_write,
|
||||
.setup = stm32_console_setup,
|
||||
.write = stm32_usart_console_write,
|
||||
.setup = stm32_usart_console_setup,
|
||||
.flags = CON_PRINTBUFFER,
|
||||
.index = -1,
|
||||
.data = &stm32_usart_driver,
|
||||
|
|
@ -1419,7 +1424,7 @@ static struct uart_driver stm32_usart_driver = {
|
|||
.cons = STM32_SERIAL_CONSOLE,
|
||||
};
|
||||
|
||||
static void __maybe_unused stm32_serial_enable_wakeup(struct uart_port *port,
|
||||
static void __maybe_unused stm32_usart_serial_en_wakeup(struct uart_port *port,
|
||||
bool enable)
|
||||
{
|
||||
struct stm32_port *stm32_port = to_stm32_port(port);
|
||||
|
|
@ -1431,29 +1436,29 @@ static void __maybe_unused stm32_serial_enable_wakeup(struct uart_port *port,
|
|||
return;
|
||||
|
||||
if (enable) {
|
||||
stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
stm32_set_bits(port, ofs->cr1, USART_CR1_UESM);
|
||||
stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
stm32_usart_set_bits(port, ofs->cr1, USART_CR1_UESM);
|
||||
val = readl_relaxed(port->membase + ofs->cr3);
|
||||
val &= ~USART_CR3_WUS_MASK;
|
||||
/* Enable Wake up interrupt from low power on start bit */
|
||||
val |= USART_CR3_WUS_START_BIT | USART_CR3_WUFIE;
|
||||
writel_relaxed(val, port->membase + ofs->cr3);
|
||||
stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
|
||||
} else {
|
||||
stm32_clr_bits(port, ofs->cr1, USART_CR1_UESM);
|
||||
stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_UESM);
|
||||
}
|
||||
}
|
||||
|
||||
static int __maybe_unused stm32_serial_suspend(struct device *dev)
|
||||
static int __maybe_unused stm32_usart_serial_suspend(struct device *dev)
|
||||
{
|
||||
struct uart_port *port = dev_get_drvdata(dev);
|
||||
|
||||
uart_suspend_port(&stm32_usart_driver, port);
|
||||
|
||||
if (device_may_wakeup(dev))
|
||||
stm32_serial_enable_wakeup(port, true);
|
||||
stm32_usart_serial_en_wakeup(port, true);
|
||||
else
|
||||
stm32_serial_enable_wakeup(port, false);
|
||||
stm32_usart_serial_en_wakeup(port, false);
|
||||
|
||||
/*
|
||||
* When "no_console_suspend" is enabled, keep the pinctrl default state
|
||||
|
|
@ -1471,19 +1476,19 @@ static int __maybe_unused stm32_serial_suspend(struct device *dev)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused stm32_serial_resume(struct device *dev)
|
||||
static int __maybe_unused stm32_usart_serial_resume(struct device *dev)
|
||||
{
|
||||
struct uart_port *port = dev_get_drvdata(dev);
|
||||
|
||||
pinctrl_pm_select_default_state(dev);
|
||||
|
||||
if (device_may_wakeup(dev))
|
||||
stm32_serial_enable_wakeup(port, false);
|
||||
stm32_usart_serial_en_wakeup(port, false);
|
||||
|
||||
return uart_resume_port(&stm32_usart_driver, port);
|
||||
}
|
||||
|
||||
static int __maybe_unused stm32_serial_runtime_suspend(struct device *dev)
|
||||
static int __maybe_unused stm32_usart_runtime_suspend(struct device *dev)
|
||||
{
|
||||
struct uart_port *port = dev_get_drvdata(dev);
|
||||
struct stm32_port *stm32port = container_of(port,
|
||||
|
|
@ -1494,7 +1499,7 @@ static int __maybe_unused stm32_serial_runtime_suspend(struct device *dev)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused stm32_serial_runtime_resume(struct device *dev)
|
||||
static int __maybe_unused stm32_usart_runtime_resume(struct device *dev)
|
||||
{
|
||||
struct uart_port *port = dev_get_drvdata(dev);
|
||||
struct stm32_port *stm32port = container_of(port,
|
||||
|
|
@ -1504,14 +1509,15 @@ static int __maybe_unused stm32_serial_runtime_resume(struct device *dev)
|
|||
}
|
||||
|
||||
static const struct dev_pm_ops stm32_serial_pm_ops = {
|
||||
SET_RUNTIME_PM_OPS(stm32_serial_runtime_suspend,
|
||||
stm32_serial_runtime_resume, NULL)
|
||||
SET_SYSTEM_SLEEP_PM_OPS(stm32_serial_suspend, stm32_serial_resume)
|
||||
SET_RUNTIME_PM_OPS(stm32_usart_runtime_suspend,
|
||||
stm32_usart_runtime_resume, NULL)
|
||||
SET_SYSTEM_SLEEP_PM_OPS(stm32_usart_serial_suspend,
|
||||
stm32_usart_serial_resume)
|
||||
};
|
||||
|
||||
static struct platform_driver stm32_serial_driver = {
|
||||
.probe = stm32_serial_probe,
|
||||
.remove = stm32_serial_remove,
|
||||
.probe = stm32_usart_serial_probe,
|
||||
.remove = stm32_usart_serial_remove,
|
||||
.driver = {
|
||||
.name = DRIVER_NAME,
|
||||
.pm = &stm32_serial_pm_ops,
|
||||
|
|
@ -1519,7 +1525,7 @@ static struct platform_driver stm32_serial_driver = {
|
|||
},
|
||||
};
|
||||
|
||||
static int __init usart_init(void)
|
||||
static int __init stm32_usart_init(void)
|
||||
{
|
||||
static char banner[] __initdata = "STM32 USART driver initialized";
|
||||
int ret;
|
||||
|
|
@ -1537,14 +1543,14 @@ static int __init usart_init(void)
|
|||
return ret;
|
||||
}
|
||||
|
||||
static void __exit usart_exit(void)
|
||||
static void __exit stm32_usart_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&stm32_serial_driver);
|
||||
uart_unregister_driver(&stm32_usart_driver);
|
||||
}
|
||||
|
||||
module_init(usart_init);
|
||||
module_exit(usart_exit);
|
||||
module_init(stm32_usart_init);
|
||||
module_exit(stm32_usart_exit);
|
||||
|
||||
MODULE_ALIAS("platform:" DRIVER_NAME);
|
||||
MODULE_DESCRIPTION("STMicroelectronics STM32 serial port driver");
|
||||
|
|
|
|||
Loading…
Reference in New Issue