diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 348 |
1 files changed, 177 insertions, 171 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index a0ef86d71317..717a97759928 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -34,15 +34,15 @@ #include "serial_mctrl_gpio.h" #include "stm32-usart.h" -static void stm32_stop_tx(struct uart_port *port); -static void stm32_transmit_chars(struct uart_port *port); +static void stm32_usart_stop_tx(struct uart_port *port); +static void stm32_usart_transmit_chars(struct uart_port *port); static inline struct stm32_port *to_stm32_port(struct uart_port *port) { return container_of(port, struct stm32_port, port); } -static void stm32_set_bits(struct uart_port *port, u32 reg, u32 bits) +static void stm32_usart_set_bits(struct uart_port *port, u32 reg, u32 bits) { u32 val; @@ -51,7 +51,7 @@ static void stm32_set_bits(struct uart_port *port, u32 reg, u32 bits) writel_relaxed(val, port->membase + reg); } -static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits) +static void stm32_usart_clr_bits(struct uart_port *port, u32 reg, u32 bits) { u32 val; @@ -60,8 +60,8 @@ static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits) writel_relaxed(val, port->membase + reg); } -static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE, - u32 delay_DDE, u32 baud) +static void stm32_usart_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE, + u32 delay_DDE, u32 baud) { u32 rs485_deat_dedt; u32 rs485_deat_dedt_max = (USART_CR1_DEAT_MASK >> USART_CR1_DEAT_SHIFT); @@ -95,8 +95,8 @@ static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE, *cr1 |= rs485_deat_dedt; } -static int stm32_config_rs485(struct uart_port *port, - struct serial_rs485 *rs485conf) +static int stm32_usart_config_rs485(struct uart_port *port, + struct serial_rs485 *rs485conf) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -104,7 +104,7 @@ static int stm32_config_rs485(struct uart_port *port, u32 usartdiv, baud, cr1, cr3; bool over8; - stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit)); + stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit)); port->rs485 = *rs485conf; @@ -122,9 +122,10 @@ static int stm32_config_rs485(struct uart_port *port, << USART_BRR_04_R_SHIFT; baud = DIV_ROUND_CLOSEST(port->uartclk, usartdiv); - stm32_config_reg_rs485(&cr1, &cr3, - rs485conf->delay_rts_before_send, - rs485conf->delay_rts_after_send, baud); + stm32_usart_config_reg_rs485(&cr1, &cr3, + rs485conf->delay_rts_before_send, + rs485conf->delay_rts_after_send, + baud); if (rs485conf->flags & SER_RS485_RTS_ON_SEND) { cr3 &= ~USART_CR3_DEP; @@ -137,18 +138,19 @@ static int stm32_config_rs485(struct uart_port *port, writel_relaxed(cr3, port->membase + ofs->cr3); writel_relaxed(cr1, port->membase + ofs->cr1); } else { - stm32_clr_bits(port, ofs->cr3, USART_CR3_DEM | USART_CR3_DEP); - stm32_clr_bits(port, ofs->cr1, - USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK); + stm32_usart_clr_bits(port, ofs->cr3, + USART_CR3_DEM | USART_CR3_DEP); + stm32_usart_clr_bits(port, ofs->cr1, + USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK); } - stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit)); + stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit)); return 0; } -static int stm32_init_rs485(struct uart_port *port, - struct platform_device *pdev) +static int stm32_usart_init_rs485(struct uart_port *port, + struct platform_device *pdev) { struct serial_rs485 *rs485conf = &port->rs485; @@ -162,8 +164,8 @@ static int stm32_init_rs485(struct uart_port *port, return uart_get_rs485_mode(port); } -static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res, - bool threaded) +static int stm32_usart_pending_rx(struct uart_port *port, u32 *sr, + int *last_res, bool threaded) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -186,8 +188,8 @@ static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res, return 0; } -static unsigned long stm32_get_char(struct uart_port *port, u32 *sr, - int *last_res) +static unsigned long stm32_usart_get_char(struct uart_port *port, u32 *sr, + int *last_res) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -206,7 +208,7 @@ static unsigned long stm32_get_char(struct uart_port *port, u32 *sr, return c; } -static void stm32_receive_chars(struct uart_port *port, bool threaded) +static void stm32_usart_receive_chars(struct uart_port *port, bool threaded) { struct tty_port *tport = &port->state->port; struct stm32_port *stm32_port = to_stm32_port(port); @@ -218,7 +220,8 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded) if (irqd_is_wakeup_set(irq_get_irq_data(port->irq))) pm_wakeup_event(tport->tty->dev, 0); - while (stm32_pending_rx(port, &sr, &stm32_port->last_res, threaded)) { + while (stm32_usart_pending_rx(port, &sr, &stm32_port->last_res, + threaded)) { sr |= USART_SR_DUMMY_RX; flag = TTY_NORMAL; @@ -237,7 +240,7 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded) writel_relaxed(sr & USART_SR_ERR_MASK, port->membase + ofs->icr); - c = stm32_get_char(port, &sr, &stm32_port->last_res); + c = stm32_usart_get_char(port, &sr, &stm32_port->last_res); port->icount.rx++; if (sr & USART_SR_ERR_MASK) { if (sr & USART_SR_ORE) { @@ -277,20 +280,20 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded) spin_lock(&port->lock); } -static void stm32_tx_dma_complete(void *arg) +static void stm32_usart_tx_dma_complete(void *arg) { struct uart_port *port = arg; struct stm32_port *stm32port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32port->info->ofs; - stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT); + stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT); stm32port->tx_dma_busy = false; /* Let's see if we have pending data to send */ - stm32_transmit_chars(port); + stm32_usart_transmit_chars(port); } -static void stm32_tx_interrupt_enable(struct uart_port *port) +static void stm32_usart_tx_interrupt_enable(struct uart_port *port) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -300,30 +303,30 @@ static void stm32_tx_interrupt_enable(struct uart_port *port) * or TX empty irq when FIFO is disabled */ if (stm32_port->fifoen) - stm32_set_bits(port, ofs->cr3, USART_CR3_TXFTIE); + stm32_usart_set_bits(port, ofs->cr3, USART_CR3_TXFTIE); else - stm32_set_bits(port, ofs->cr1, USART_CR1_TXEIE); + stm32_usart_set_bits(port, ofs->cr1, USART_CR1_TXEIE); } -static void stm32_tx_interrupt_disable(struct uart_port *port) +static void stm32_usart_tx_interrupt_disable(struct uart_port *port) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; if (stm32_port->fifoen) - stm32_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE); + stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE); else - stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE); + stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_TXEIE); } -static void stm32_transmit_chars_pio(struct uart_port *port) +static void stm32_usart_transmit_chars_pio(struct uart_port *port) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; struct circ_buf *xmit = &port->state->xmit; if (stm32_port->tx_dma_busy) { - stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT); + stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT); stm32_port->tx_dma_busy = false; } @@ -338,12 +341,12 @@ static void stm32_transmit_chars_pio(struct uart_port *port) /* rely on TXE irq (mask or unmask) for sending remaining data */ if (uart_circ_empty(xmit)) - stm32_tx_interrupt_disable(port); + stm32_usart_tx_interrupt_disable(port); else - stm32_tx_interrupt_enable(port); + stm32_usart_tx_interrupt_enable(port); } -static void stm32_transmit_chars_dma(struct uart_port *port) +static void stm32_usart_transmit_chars_dma(struct uart_port *port) { struct stm32_port *stm32port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32port->info->ofs; @@ -385,7 +388,7 @@ static void stm32_transmit_chars_dma(struct uart_port *port) if (!desc) goto fallback_err; - desc->callback = stm32_tx_dma_complete; + desc->callback = stm32_usart_tx_dma_complete; desc->callback_param = port; /* Push current DMA TX transaction in the pending queue */ @@ -398,7 +401,7 @@ static void stm32_transmit_chars_dma(struct uart_port *port) /* Issue pending DMA TX requests */ dma_async_issue_pending(stm32port->tx_ch); - stm32_set_bits(port, ofs->cr3, USART_CR3_DMAT); + stm32_usart_set_bits(port, ofs->cr3, USART_CR3_DMAT); xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1); port->icount.tx += count; @@ -406,10 +409,10 @@ static void stm32_transmit_chars_dma(struct uart_port *port) fallback_err: for (i = count; i > 0; i--) - stm32_transmit_chars_pio(port); + stm32_usart_transmit_chars_pio(port); } -static void stm32_transmit_chars(struct uart_port *port) +static void stm32_usart_transmit_chars(struct uart_port *port) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -417,38 +420,38 @@ static void stm32_transmit_chars(struct uart_port *port) if (port->x_char) { if (stm32_port->tx_dma_busy) - stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT); + stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT); writel_relaxed(port->x_char, port->membase + ofs->tdr); port->x_char = 0; port->icount.tx++; if (stm32_port->tx_dma_busy) - stm32_set_bits(port, ofs->cr3, USART_CR3_DMAT); + stm32_usart_set_bits(port, ofs->cr3, USART_CR3_DMAT); return; } if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - stm32_tx_interrupt_disable(port); + stm32_usart_tx_interrupt_disable(port); return; } if (ofs->icr == UNDEF_REG) - stm32_clr_bits(port, ofs->isr, USART_SR_TC); + stm32_usart_clr_bits(port, ofs->isr, USART_SR_TC); else writel_relaxed(USART_ICR_TCCF, port->membase + ofs->icr); if (stm32_port->tx_ch) - stm32_transmit_chars_dma(port); + stm32_usart_transmit_chars_dma(port); else - stm32_transmit_chars_pio(port); + stm32_usart_transmit_chars_pio(port); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); if (uart_circ_empty(xmit)) - stm32_tx_interrupt_disable(port); + stm32_usart_tx_interrupt_disable(port); } -static irqreturn_t stm32_interrupt(int irq, void *ptr) +static irqreturn_t stm32_usart_interrupt(int irq, void *ptr) { struct uart_port *port = ptr; struct stm32_port *stm32_port = to_stm32_port(port); @@ -468,10 +471,10 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr) port->membase + ofs->icr); if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch)) - stm32_receive_chars(port, false); + stm32_usart_receive_chars(port, false); if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch)) - stm32_transmit_chars(port); + stm32_usart_transmit_chars(port); spin_unlock(&port->lock); @@ -481,7 +484,7 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr) return IRQ_HANDLED; } -static irqreturn_t stm32_threaded_interrupt(int irq, void *ptr) +static irqreturn_t stm32_usart_threaded_interrupt(int irq, void *ptr) { struct uart_port *port = ptr; struct stm32_port *stm32_port = to_stm32_port(port); @@ -489,14 +492,14 @@ static irqreturn_t stm32_threaded_interrupt(int irq, void *ptr) spin_lock(&port->lock); if (stm32_port->rx_ch) - stm32_receive_chars(port, true); + stm32_usart_receive_chars(port, true); spin_unlock(&port->lock); return IRQ_HANDLED; } -static unsigned int stm32_tx_empty(struct uart_port *port) +static unsigned int stm32_usart_tx_empty(struct uart_port *port) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -504,20 +507,20 @@ static unsigned int stm32_tx_empty(struct uart_port *port) return readl_relaxed(port->membase + ofs->isr) & USART_SR_TXE; } -static void stm32_set_mctrl(struct uart_port *port, unsigned int mctrl) +static void stm32_usart_set_mctrl(struct uart_port *port, unsigned int mctrl) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS)) - stm32_set_bits(port, ofs->cr3, USART_CR3_RTSE); + stm32_usart_set_bits(port, ofs->cr3, USART_CR3_RTSE); 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; @@ -721,8 +724,9 @@ static unsigned int stm32_get_databits(struct ktermios *termios) return bits; } -static void stm32_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) +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); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -746,8 +750,8 @@ 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, - USART_RQR_TXFRQ | USART_RQR_RXFRQ); + stm32_usart_set_bits(port, ofs->rqr, + USART_RQR_TXFRQ | USART_RQR_RXFRQ); cr1 = USART_CR1_TE | USART_CR1_RE; if (stm32_port->fifoen) @@ -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, - rs485conf->delay_rts_before_send, - rs485conf->delay_rts_after_send, baud); + stm32_usart_config_reg_rs485(&cr1, &cr3, + rs485conf->delay_rts_before_send, + 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; @@ -889,39 +894,39 @@ 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, - unsigned int oldstate) +static void stm32_usart_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) { struct stm32_port *stm32port = container_of(port, struct stm32_port, 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; @@ -943,29 +948,29 @@ 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, - struct platform_device *pdev) +static int stm32_usart_init_port(struct stm32_port *stm32port, + struct platform_device *pdev) { struct uart_port *port = &stm32port->port; struct resource *res; @@ -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 @@ err_clk: 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; @@ -1081,8 +1086,8 @@ 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, - struct platform_device *pdev) +static int stm32_usart_of_dma_rx_probe(struct stm32_port *stm32port, + struct platform_device *pdev) { struct stm32_usart_offsets *ofs = &stm32port->info->ofs; struct uart_port *port = &stm32port->port; @@ -1156,8 +1161,8 @@ alloc_err: return ret; } -static int stm32_of_dma_tx_probe(struct stm32_port *stm32port, - struct platform_device *pdev) +static int stm32_usart_of_dma_tx_probe(struct stm32_port *stm32port, + struct platform_device *pdev) { struct stm32_usart_offsets *ofs = &stm32port->info->ofs; struct uart_port *port = &stm32port->port; @@ -1207,13 +1212,13 @@ alloc_err: 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 @@ err_uninit: 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; @@ -1331,8 +1336,8 @@ 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, - unsigned int cnt) +static void stm32_usart_console_write(struct console *co, const char *s, + unsigned int cnt) { struct uart_port *port = &stm32_ports[co->index].port; struct stm32_port *stm32_port = to_stm32_port(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, @@ -1419,8 +1424,8 @@ static struct uart_driver stm32_usart_driver = { .cons = STM32_SERIAL_CONSOLE, }; -static void __maybe_unused stm32_serial_enable_wakeup(struct uart_port *port, - bool enable) +static void __maybe_unused stm32_usart_serial_en_wakeup(struct uart_port *port, + bool enable) { struct stm32_port *stm32_port = to_stm32_port(port); struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; @@ -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"); |