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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 2021-01-06 17:21:58 +01:00 коммит произвёл Greg Kroah-Hartman
Родитель 92fc002386
Коммит 56f9a76c27
1 изменённых файлов: 177 добавлений и 171 удалений
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348
drivers/tty/serial/stm32-usart.c
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@ -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");