*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;
- struct stm32_usart_config *cfg = &stm32_port->info->cfg;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
+ const struct stm32_usart_config *cfg = &stm32_port->info->cfg;
u32 usartdiv, baud, cr1, cr3;
bool over8;
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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
enum dma_status status;
struct dma_tx_state state;
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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
unsigned long c;
if (stm32_port->rx_ch) {
{
struct uart_port *port = arg;
struct stm32_port *stm32port = to_stm32_port(port);
- struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
+ const 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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
/*
* Enables TX FIFO threashold irq when FIFO is enabled,
* 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;
+ const 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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct circ_buf *xmit = &port->state->xmit;
if (stm32_port->tx_dma_busy) {
/* 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;
+ const struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
struct circ_buf *xmit = &port->state->xmit;
struct dma_async_tx_descriptor *desc = NULL;
unsigned int count, i;
xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
port->icount.tx += count;
+ return;
+
+fallback_err:
+ for (i = count; i > 0; i--)
+ 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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct circ_buf *xmit = &port->state->xmit;
if (port->x_char) {
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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
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;
+ const 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);
}
}
/* 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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
unsigned long flags;
spin_lock_irqsave(&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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
unsigned long flags;
spin_lock_irqsave(&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;
+ const 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 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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
const char *name = to_platform_device(port->dev)->name;
u32 val;
int ret;
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;
- struct stm32_usart_config *cfg = &stm32_port->info->cfg;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
+ const struct stm32_usart_config *cfg = &stm32_port->info->cfg;
u32 val, isr;
int ret;
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;
- struct stm32_usart_config *cfg = &stm32_port->info->cfg;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
+ const struct stm32_usart_config *cfg = &stm32_port->info->cfg;
struct serial_rs485 *rs485conf = &port->rs485;
unsigned int baud, bits;
u32 usartdiv, mantissa, fraction, oversampling;
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;
+ const struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
struct uart_port *port = &stm32port->port;
struct device *dev = &pdev->dev;
struct dma_slave_config config;
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;
+ const struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
struct uart_port *port = &stm32port->port;
struct device *dev = &pdev->dev;
struct dma_slave_config config;
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;
if (!stm32port)
return -ENODEV;
- match = of_match_device(stm32_match, &pdev->dev);
- if (match && match->data)
- stm32port->info = (struct stm32_usart_info *)match->data;
- else
+ stm32port->info = of_device_get_match_data(&pdev->dev);
+ if (!stm32port->info)
return -EINVAL;
- ret = stm32_init_port(stm32port, pdev);
+ ret = stm32_usart_init_port(stm32port, pdev);
if (ret)
return ret;
return err;
}
-
#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;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
while (!(readl_relaxed(port->membase + ofs->isr) & USART_SR_TXE))
cpu_relax();
.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;
- struct stm32_usart_config *cfg = &stm32_port->info->cfg;
+ const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
+ const struct stm32_usart_config *cfg = &stm32_port->info->cfg;
u32 val;
if (stm32_port->wakeirq <= 0)