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path: root/drivers/tty/serial/xilinx_uartps.c
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Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
-rw-r--r--drivers/tty/serial/xilinx_uartps.c242
1 files changed, 124 insertions, 118 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index cff531a51a78..f218ec658f5d 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -37,10 +37,7 @@
#define CDNS_UART_MINOR 0 /* works best with devtmpfs */
#define CDNS_UART_NR_PORTS 2
#define CDNS_UART_FIFO_SIZE 64 /* FIFO size */
-#define CDNS_UART_REGISTER_SPACE 0xFFF
-
-#define cdns_uart_readl(offset) ioread32(port->membase + offset)
-#define cdns_uart_writel(val, offset) iowrite32(val, port->membase + offset)
+#define CDNS_UART_REGISTER_SPACE 0x1000
/* Rx Trigger level */
static int rx_trigger_level = 56;
@@ -195,7 +192,7 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
/* Read the interrupt status register to determine which
* interrupt(s) is/are active.
*/
- isrstatus = cdns_uart_readl(CDNS_UART_ISR_OFFSET);
+ isrstatus = readl(port->membase + CDNS_UART_ISR_OFFSET);
/*
* There is no hardware break detection, so we interpret framing
@@ -203,14 +200,15 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
* there's another non-zero byte at the end of the sequence.
*/
if (isrstatus & CDNS_UART_IXR_FRAMING) {
- while (!(cdns_uart_readl(CDNS_UART_SR_OFFSET) &
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
CDNS_UART_SR_RXEMPTY)) {
- if (!cdns_uart_readl(CDNS_UART_FIFO_OFFSET)) {
+ if (!readl(port->membase + CDNS_UART_FIFO_OFFSET)) {
port->read_status_mask |= CDNS_UART_IXR_BRK;
isrstatus &= ~CDNS_UART_IXR_FRAMING;
}
}
- cdns_uart_writel(CDNS_UART_IXR_FRAMING, CDNS_UART_ISR_OFFSET);
+ writel(CDNS_UART_IXR_FRAMING,
+ port->membase + CDNS_UART_ISR_OFFSET);
}
/* drop byte with parity error if IGNPAR specified */
@@ -223,9 +221,9 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
if ((isrstatus & CDNS_UART_IXR_TOUT) ||
(isrstatus & CDNS_UART_IXR_RXTRIG)) {
/* Receive Timeout Interrupt */
- while ((cdns_uart_readl(CDNS_UART_SR_OFFSET) &
- CDNS_UART_SR_RXEMPTY) != CDNS_UART_SR_RXEMPTY) {
- data = cdns_uart_readl(CDNS_UART_FIFO_OFFSET);
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
+ CDNS_UART_SR_RXEMPTY)) {
+ data = readl(port->membase + CDNS_UART_FIFO_OFFSET);
/* Non-NULL byte after BREAK is garbage (99%) */
if (data && (port->read_status_mask &
@@ -275,8 +273,8 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
/* Dispatch an appropriate handler */
if ((isrstatus & CDNS_UART_IXR_TXEMPTY) == CDNS_UART_IXR_TXEMPTY) {
if (uart_circ_empty(&port->state->xmit)) {
- cdns_uart_writel(CDNS_UART_IXR_TXEMPTY,
- CDNS_UART_IDR_OFFSET);
+ writel(CDNS_UART_IXR_TXEMPTY,
+ port->membase + CDNS_UART_IDR_OFFSET);
} else {
numbytes = port->fifosize;
/* Break if no more data available in the UART buffer */
@@ -287,9 +285,9 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
* and write it to the cdns_uart's TX_FIFO
* register.
*/
- cdns_uart_writel(
- port->state->xmit.buf[port->state->xmit.
- tail], CDNS_UART_FIFO_OFFSET);
+ writel(port->state->xmit.buf[
+ port->state->xmit.tail],
+ port->membase + CDNS_UART_FIFO_OFFSET);
port->icount.tx++;
@@ -307,7 +305,7 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id)
}
}
- cdns_uart_writel(isrstatus, CDNS_UART_ISR_OFFSET);
+ writel(isrstatus, port->membase + CDNS_UART_ISR_OFFSET);
/* be sure to release the lock and tty before leaving */
spin_unlock_irqrestore(&port->lock, flags);
@@ -397,14 +395,14 @@ static unsigned int cdns_uart_set_baud_rate(struct uart_port *port,
&div8);
/* Write new divisors to hardware */
- mreg = cdns_uart_readl(CDNS_UART_MR_OFFSET);
+ mreg = readl(port->membase + CDNS_UART_MR_OFFSET);
if (div8)
mreg |= CDNS_UART_MR_CLKSEL;
else
mreg &= ~CDNS_UART_MR_CLKSEL;
- cdns_uart_writel(mreg, CDNS_UART_MR_OFFSET);
- cdns_uart_writel(cd, CDNS_UART_BAUDGEN_OFFSET);
- cdns_uart_writel(bdiv, CDNS_UART_BAUDDIV_OFFSET);
+ writel(mreg, port->membase + CDNS_UART_MR_OFFSET);
+ writel(cd, port->membase + CDNS_UART_BAUDGEN_OFFSET);
+ writel(bdiv, port->membase + CDNS_UART_BAUDDIV_OFFSET);
cdns_uart->baud = baud;
return calc_baud;
@@ -451,9 +449,9 @@ static int cdns_uart_clk_notifier_cb(struct notifier_block *nb,
spin_lock_irqsave(&cdns_uart->port->lock, flags);
/* Disable the TX and RX to set baud rate */
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg |= CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
spin_unlock_irqrestore(&cdns_uart->port->lock, flags);
@@ -478,11 +476,11 @@ static int cdns_uart_clk_notifier_cb(struct notifier_block *nb,
spin_lock_irqsave(&cdns_uart->port->lock, flags);
/* Set TX/RX Reset */
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg |= CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
- while (cdns_uart_readl(CDNS_UART_CR_OFFSET) &
+ while (readl(port->membase + CDNS_UART_CR_OFFSET) &
(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST))
cpu_relax();
@@ -491,11 +489,11 @@ static int cdns_uart_clk_notifier_cb(struct notifier_block *nb,
* enable bit and RX enable bit to enable the transmitter and
* receiver.
*/
- cdns_uart_writel(rx_timeout, CDNS_UART_RXTOUT_OFFSET);
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ writel(rx_timeout, port->membase + CDNS_UART_RXTOUT_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg &= ~(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS);
ctrl_reg |= CDNS_UART_CR_TX_EN | CDNS_UART_CR_RX_EN;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
spin_unlock_irqrestore(&cdns_uart->port->lock, flags);
@@ -517,14 +515,14 @@ static void cdns_uart_start_tx(struct uart_port *port)
if (uart_circ_empty(&port->state->xmit) || uart_tx_stopped(port))
return;
- status = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ status = readl(port->membase + CDNS_UART_CR_OFFSET);
/* Set the TX enable bit and clear the TX disable bit to enable the
* transmitter.
*/
- cdns_uart_writel((status & ~CDNS_UART_CR_TX_DIS) | CDNS_UART_CR_TX_EN,
- CDNS_UART_CR_OFFSET);
+ writel((status & ~CDNS_UART_CR_TX_DIS) | CDNS_UART_CR_TX_EN,
+ port->membase + CDNS_UART_CR_OFFSET);
- while (numbytes-- && ((cdns_uart_readl(CDNS_UART_SR_OFFSET) &
+ while (numbytes-- && ((readl(port->membase + CDNS_UART_SR_OFFSET) &
CDNS_UART_SR_TXFULL)) != CDNS_UART_SR_TXFULL) {
/* Break if no more data available in the UART buffer */
if (uart_circ_empty(&port->state->xmit))
@@ -533,9 +531,8 @@ static void cdns_uart_start_tx(struct uart_port *port)
/* Get the data from the UART circular buffer and
* write it to the cdns_uart's TX_FIFO register.
*/
- cdns_uart_writel(
- port->state->xmit.buf[port->state->xmit.tail],
- CDNS_UART_FIFO_OFFSET);
+ writel(port->state->xmit.buf[port->state->xmit.tail],
+ port->membase + CDNS_UART_FIFO_OFFSET);
port->icount.tx++;
/* Adjust the tail of the UART buffer and wrap
@@ -544,9 +541,9 @@ static void cdns_uart_start_tx(struct uart_port *port)
port->state->xmit.tail = (port->state->xmit.tail + 1) &
(UART_XMIT_SIZE - 1);
}
- cdns_uart_writel(CDNS_UART_IXR_TXEMPTY, CDNS_UART_ISR_OFFSET);
+ writel(CDNS_UART_IXR_TXEMPTY, port->membase + CDNS_UART_ISR_OFFSET);
/* Enable the TX Empty interrupt */
- cdns_uart_writel(CDNS_UART_IXR_TXEMPTY, CDNS_UART_IER_OFFSET);
+ writel(CDNS_UART_IXR_TXEMPTY, port->membase + CDNS_UART_IER_OFFSET);
if (uart_circ_chars_pending(&port->state->xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
@@ -560,10 +557,10 @@ static void cdns_uart_stop_tx(struct uart_port *port)
{
unsigned int regval;
- regval = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ regval = readl(port->membase + CDNS_UART_CR_OFFSET);
regval |= CDNS_UART_CR_TX_DIS;
/* Disable the transmitter */
- cdns_uart_writel(regval, CDNS_UART_CR_OFFSET);
+ writel(regval, port->membase + CDNS_UART_CR_OFFSET);
}
/**
@@ -574,10 +571,10 @@ static void cdns_uart_stop_rx(struct uart_port *port)
{
unsigned int regval;
- regval = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ regval = readl(port->membase + CDNS_UART_CR_OFFSET);
regval |= CDNS_UART_CR_RX_DIS;
/* Disable the receiver */
- cdns_uart_writel(regval, CDNS_UART_CR_OFFSET);
+ writel(regval, port->membase + CDNS_UART_CR_OFFSET);
}
/**
@@ -590,7 +587,8 @@ static unsigned int cdns_uart_tx_empty(struct uart_port *port)
{
unsigned int status;
- status = cdns_uart_readl(CDNS_UART_SR_OFFSET) & CDNS_UART_SR_TXEMPTY;
+ status = readl(port->membase + CDNS_UART_SR_OFFSET) &
+ CDNS_UART_SR_TXEMPTY;
return status ? TIOCSER_TEMT : 0;
}
@@ -607,15 +605,15 @@ static void cdns_uart_break_ctl(struct uart_port *port, int ctl)
spin_lock_irqsave(&port->lock, flags);
- status = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ status = readl(port->membase + CDNS_UART_CR_OFFSET);
if (ctl == -1)
- cdns_uart_writel(CDNS_UART_CR_STARTBRK | status,
- CDNS_UART_CR_OFFSET);
+ writel(CDNS_UART_CR_STARTBRK | status,
+ port->membase + CDNS_UART_CR_OFFSET);
else {
if ((status & CDNS_UART_CR_STOPBRK) == 0)
- cdns_uart_writel(CDNS_UART_CR_STOPBRK | status,
- CDNS_UART_CR_OFFSET);
+ writel(CDNS_UART_CR_STOPBRK | status,
+ port->membase + CDNS_UART_CR_OFFSET);
}
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -638,17 +636,18 @@ static void cdns_uart_set_termios(struct uart_port *port,
spin_lock_irqsave(&port->lock, flags);
/* Wait for the transmit FIFO to empty before making changes */
- if (!(cdns_uart_readl(CDNS_UART_CR_OFFSET) & CDNS_UART_CR_TX_DIS)) {
- while (!(cdns_uart_readl(CDNS_UART_SR_OFFSET) &
+ if (!(readl(port->membase + CDNS_UART_CR_OFFSET) &
+ CDNS_UART_CR_TX_DIS)) {
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
CDNS_UART_SR_TXEMPTY)) {
cpu_relax();
}
}
/* Disable the TX and RX to set baud rate */
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg |= CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
/*
* Min baud rate = 6bps and Max Baud Rate is 10Mbps for 100Mhz clk
@@ -667,20 +666,20 @@ static void cdns_uart_set_termios(struct uart_port *port,
uart_update_timeout(port, termios->c_cflag, baud);
/* Set TX/RX Reset */
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg |= CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
/*
* Clear the RX disable and TX disable bits and then set the TX enable
* bit and RX enable bit to enable the transmitter and receiver.
*/
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg &= ~(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS);
ctrl_reg |= CDNS_UART_CR_TX_EN | CDNS_UART_CR_RX_EN;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
- cdns_uart_writel(rx_timeout, CDNS_UART_RXTOUT_OFFSET);
+ writel(rx_timeout, port->membase + CDNS_UART_RXTOUT_OFFSET);
port->read_status_mask = CDNS_UART_IXR_TXEMPTY | CDNS_UART_IXR_RXTRIG |
CDNS_UART_IXR_OVERRUN | CDNS_UART_IXR_TOUT;
@@ -700,7 +699,7 @@ static void cdns_uart_set_termios(struct uart_port *port,
CDNS_UART_IXR_TOUT | CDNS_UART_IXR_PARITY |
CDNS_UART_IXR_FRAMING | CDNS_UART_IXR_OVERRUN;
- mode_reg = cdns_uart_readl(CDNS_UART_MR_OFFSET);
+ mode_reg = readl(port->membase + CDNS_UART_MR_OFFSET);
/* Handling Data Size */
switch (termios->c_cflag & CSIZE) {
@@ -741,7 +740,7 @@ static void cdns_uart_set_termios(struct uart_port *port,
cval |= CDNS_UART_MR_PARITY_NONE;
}
cval |= mode_reg & 1;
- cdns_uart_writel(cval, CDNS_UART_MR_OFFSET);
+ writel(cval, port->membase + CDNS_UART_MR_OFFSET);
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -762,52 +761,53 @@ static int cdns_uart_startup(struct uart_port *port)
return retval;
/* Disable the TX and RX */
- cdns_uart_writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS,
- CDNS_UART_CR_OFFSET);
+ writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS,
+ port->membase + CDNS_UART_CR_OFFSET);
/* Set the Control Register with TX/RX Enable, TX/RX Reset,
* no break chars.
*/
- cdns_uart_writel(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST,
- CDNS_UART_CR_OFFSET);
+ writel(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST,
+ port->membase + CDNS_UART_CR_OFFSET);
- status = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ status = readl(port->membase + CDNS_UART_CR_OFFSET);
/* Clear the RX disable and TX disable bits and then set the TX enable
* bit and RX enable bit to enable the transmitter and receiver.
*/
- cdns_uart_writel((status & ~(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS))
+ writel((status & ~(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS))
| (CDNS_UART_CR_TX_EN | CDNS_UART_CR_RX_EN |
- CDNS_UART_CR_STOPBRK), CDNS_UART_CR_OFFSET);
+ CDNS_UART_CR_STOPBRK),
+ port->membase + CDNS_UART_CR_OFFSET);
/* Set the Mode Register with normal mode,8 data bits,1 stop bit,
* no parity.
*/
- cdns_uart_writel(CDNS_UART_MR_CHMODE_NORM | CDNS_UART_MR_STOPMODE_1_BIT
+ writel(CDNS_UART_MR_CHMODE_NORM | CDNS_UART_MR_STOPMODE_1_BIT
| CDNS_UART_MR_PARITY_NONE | CDNS_UART_MR_CHARLEN_8_BIT,
- CDNS_UART_MR_OFFSET);
+ port->membase + CDNS_UART_MR_OFFSET);
/*
* Set the RX FIFO Trigger level to use most of the FIFO, but it
* can be tuned with a module parameter
*/
- cdns_uart_writel(rx_trigger_level, CDNS_UART_RXWM_OFFSET);
+ writel(rx_trigger_level, port->membase + CDNS_UART_RXWM_OFFSET);
/*
* Receive Timeout register is enabled but it
* can be tuned with a module parameter
*/
- cdns_uart_writel(rx_timeout, CDNS_UART_RXTOUT_OFFSET);
+ writel(rx_timeout, port->membase + CDNS_UART_RXTOUT_OFFSET);
/* Clear out any pending interrupts before enabling them */
- cdns_uart_writel(cdns_uart_readl(CDNS_UART_ISR_OFFSET),
- CDNS_UART_ISR_OFFSET);
+ writel(readl(port->membase + CDNS_UART_ISR_OFFSET),
+ port->membase + CDNS_UART_ISR_OFFSET);
/* Set the Interrupt Registers with desired interrupts */
- cdns_uart_writel(CDNS_UART_IXR_TXEMPTY | CDNS_UART_IXR_PARITY |
+ writel(CDNS_UART_IXR_TXEMPTY | CDNS_UART_IXR_PARITY |
CDNS_UART_IXR_FRAMING | CDNS_UART_IXR_OVERRUN |
CDNS_UART_IXR_RXTRIG | CDNS_UART_IXR_TOUT,
- CDNS_UART_IER_OFFSET);
+ port->membase + CDNS_UART_IER_OFFSET);
return retval;
}
@@ -821,12 +821,12 @@ static void cdns_uart_shutdown(struct uart_port *port)
int status;
/* Disable interrupts */
- status = cdns_uart_readl(CDNS_UART_IMR_OFFSET);
- cdns_uart_writel(status, CDNS_UART_IDR_OFFSET);
+ status = readl(port->membase + CDNS_UART_IMR_OFFSET);
+ writel(status, port->membase + CDNS_UART_IDR_OFFSET);
/* Disable the TX and RX */
- cdns_uart_writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS,
- CDNS_UART_CR_OFFSET);
+ writel(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS,
+ port->membase + CDNS_UART_CR_OFFSET);
free_irq(port->irq, port);
}
@@ -928,7 +928,7 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
u32 val;
- val = cdns_uart_readl(CDNS_UART_MODEMCR_OFFSET);
+ val = readl(port->membase + CDNS_UART_MODEMCR_OFFSET);
val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR);
@@ -937,7 +937,7 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
if (mctrl & TIOCM_DTR)
val |= CDNS_UART_MODEMCR_DTR;
- cdns_uart_writel(val, CDNS_UART_MODEMCR_OFFSET);
+ writel(val, port->membase + CDNS_UART_MODEMCR_OFFSET);
}
#ifdef CONFIG_CONSOLE_POLL
@@ -947,17 +947,18 @@ static int cdns_uart_poll_get_char(struct uart_port *port)
int c;
/* Disable all interrupts */
- imr = cdns_uart_readl(CDNS_UART_IMR_OFFSET);
- cdns_uart_writel(imr, CDNS_UART_IDR_OFFSET);
+ imr = readl(port->membase + CDNS_UART_IMR_OFFSET);
+ writel(imr, port->membase + CDNS_UART_IDR_OFFSET);
/* Check if FIFO is empty */
- if (cdns_uart_readl(CDNS_UART_SR_OFFSET) & CDNS_UART_SR_RXEMPTY)
+ if (readl(port->membase + CDNS_UART_SR_OFFSET) & CDNS_UART_SR_RXEMPTY)
c = NO_POLL_CHAR;
else /* Read a character */
- c = (unsigned char) cdns_uart_readl(CDNS_UART_FIFO_OFFSET);
+ c = (unsigned char) readl(
+ port->membase + CDNS_UART_FIFO_OFFSET);
/* Enable interrupts */
- cdns_uart_writel(imr, CDNS_UART_IER_OFFSET);
+ writel(imr, port->membase + CDNS_UART_IER_OFFSET);
return c;
}
@@ -967,22 +968,24 @@ static void cdns_uart_poll_put_char(struct uart_port *port, unsigned char c)
u32 imr;
/* Disable all interrupts */
- imr = cdns_uart_readl(CDNS_UART_IMR_OFFSET);
- cdns_uart_writel(imr, CDNS_UART_IDR_OFFSET);
+ imr = readl(port->membase + CDNS_UART_IMR_OFFSET);
+ writel(imr, port->membase + CDNS_UART_IDR_OFFSET);
/* Wait until FIFO is empty */
- while (!(cdns_uart_readl(CDNS_UART_SR_OFFSET) & CDNS_UART_SR_TXEMPTY))
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
+ CDNS_UART_SR_TXEMPTY))
cpu_relax();
/* Write a character */
- cdns_uart_writel(c, CDNS_UART_FIFO_OFFSET);
+ writel(c, port->membase + CDNS_UART_FIFO_OFFSET);
/* Wait until FIFO is empty */
- while (!(cdns_uart_readl(CDNS_UART_SR_OFFSET) & CDNS_UART_SR_TXEMPTY))
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
+ CDNS_UART_SR_TXEMPTY))
cpu_relax();
/* Enable interrupts */
- cdns_uart_writel(imr, CDNS_UART_IER_OFFSET);
+ writel(imr, port->membase + CDNS_UART_IER_OFFSET);
return;
}
@@ -1010,7 +1013,7 @@ static struct uart_ops cdns_uart_ops = {
#endif
};
-static struct uart_port cdns_uart_port[2];
+static struct uart_port cdns_uart_port[CDNS_UART_NR_PORTS];
/**
* cdns_uart_get_port - Configure the port from platform device resource info
@@ -1038,7 +1041,6 @@ static struct uart_port *cdns_uart_get_port(int id)
/* At this point, we've got an empty uart_port struct, initialize it */
spin_lock_init(&port->lock);
port->membase = NULL;
- port->iobase = 1; /* mark port in use */
port->irq = 0;
port->type = PORT_UNKNOWN;
port->iotype = UPIO_MEM32;
@@ -1057,8 +1059,8 @@ static struct uart_port *cdns_uart_get_port(int id)
*/
static void cdns_uart_console_wait_tx(struct uart_port *port)
{
- while ((cdns_uart_readl(CDNS_UART_SR_OFFSET) & CDNS_UART_SR_TXEMPTY)
- != CDNS_UART_SR_TXEMPTY)
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
+ CDNS_UART_SR_TXEMPTY))
barrier();
}
@@ -1070,7 +1072,7 @@ static void cdns_uart_console_wait_tx(struct uart_port *port)
static void cdns_uart_console_putchar(struct uart_port *port, int ch)
{
cdns_uart_console_wait_tx(port);
- cdns_uart_writel(ch, CDNS_UART_FIFO_OFFSET);
+ writel(ch, port->membase + CDNS_UART_FIFO_OFFSET);
}
static void cdns_early_write(struct console *con, const char *s, unsigned n)
@@ -1112,24 +1114,24 @@ static void cdns_uart_console_write(struct console *co, const char *s,
spin_lock_irqsave(&port->lock, flags);
/* save and disable interrupt */
- imr = cdns_uart_readl(CDNS_UART_IMR_OFFSET);
- cdns_uart_writel(imr, CDNS_UART_IDR_OFFSET);
+ imr = readl(port->membase + CDNS_UART_IMR_OFFSET);
+ writel(imr, port->membase + CDNS_UART_IDR_OFFSET);
/*
* Make sure that the tx part is enabled. Set the TX enable bit and
* clear the TX disable bit to enable the transmitter.
*/
- ctrl = cdns_uart_readl(CDNS_UART_CR_OFFSET);
- cdns_uart_writel((ctrl & ~CDNS_UART_CR_TX_DIS) | CDNS_UART_CR_TX_EN,
- CDNS_UART_CR_OFFSET);
+ ctrl = readl(port->membase + CDNS_UART_CR_OFFSET);
+ writel((ctrl & ~CDNS_UART_CR_TX_DIS) | CDNS_UART_CR_TX_EN,
+ port->membase + CDNS_UART_CR_OFFSET);
uart_console_write(port, s, count, cdns_uart_console_putchar);
cdns_uart_console_wait_tx(port);
- cdns_uart_writel(ctrl, CDNS_UART_CR_OFFSET);
+ writel(ctrl, port->membase + CDNS_UART_CR_OFFSET);
/* restore interrupt state */
- cdns_uart_writel(imr, CDNS_UART_IER_OFFSET);
+ writel(imr, port->membase + CDNS_UART_IER_OFFSET);
if (locked)
spin_unlock_irqrestore(&port->lock, flags);
@@ -1153,8 +1155,9 @@ static int __init cdns_uart_console_setup(struct console *co, char *options)
if (co->index < 0 || co->index >= CDNS_UART_NR_PORTS)
return -EINVAL;
- if (!port->mapbase) {
- pr_debug("console on ttyPS%i not present\n", co->index);
+ if (!port->membase) {
+ pr_debug("console on " CDNS_UART_TTY_NAME "%i not present\n",
+ co->index);
return -ENODEV;
}
@@ -1240,13 +1243,14 @@ static int cdns_uart_suspend(struct device *device)
spin_lock_irqsave(&port->lock, flags);
/* Empty the receive FIFO 1st before making changes */
- while (!(cdns_uart_readl(CDNS_UART_SR_OFFSET) &
+ while (!(readl(port->membase + CDNS_UART_SR_OFFSET) &
CDNS_UART_SR_RXEMPTY))
- cdns_uart_readl(CDNS_UART_FIFO_OFFSET);
+ readl(port->membase + CDNS_UART_FIFO_OFFSET);
/* set RX trigger level to 1 */
- cdns_uart_writel(1, CDNS_UART_RXWM_OFFSET);
+ writel(1, port->membase + CDNS_UART_RXWM_OFFSET);
/* disable RX timeout interrups */
- cdns_uart_writel(CDNS_UART_IXR_TOUT, CDNS_UART_IDR_OFFSET);
+ writel(CDNS_UART_IXR_TOUT,
+ port->membase + CDNS_UART_IDR_OFFSET);
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -1285,28 +1289,30 @@ static int cdns_uart_resume(struct device *device)
spin_lock_irqsave(&port->lock, flags);
/* Set TX/RX Reset */
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg |= CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
- while (cdns_uart_readl(CDNS_UART_CR_OFFSET) &
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
+ while (readl(port->membase + CDNS_UART_CR_OFFSET) &
(CDNS_UART_CR_TXRST | CDNS_UART_CR_RXRST))
cpu_relax();
/* restore rx timeout value */
- cdns_uart_writel(rx_timeout, CDNS_UART_RXTOUT_OFFSET);
+ writel(rx_timeout, port->membase + CDNS_UART_RXTOUT_OFFSET);
/* Enable Tx/Rx */
- ctrl_reg = cdns_uart_readl(CDNS_UART_CR_OFFSET);
+ ctrl_reg = readl(port->membase + CDNS_UART_CR_OFFSET);
ctrl_reg &= ~(CDNS_UART_CR_TX_DIS | CDNS_UART_CR_RX_DIS);
ctrl_reg |= CDNS_UART_CR_TX_EN | CDNS_UART_CR_RX_EN;
- cdns_uart_writel(ctrl_reg, CDNS_UART_CR_OFFSET);
+ writel(ctrl_reg, port->membase + CDNS_UART_CR_OFFSET);
spin_unlock_irqrestore(&port->lock, flags);
} else {
spin_lock_irqsave(&port->lock, flags);
/* restore original rx trigger level */
- cdns_uart_writel(rx_trigger_level, CDNS_UART_RXWM_OFFSET);
+ writel(rx_trigger_level,
+ port->membase + CDNS_UART_RXWM_OFFSET);
/* enable RX timeout interrupt */
- cdns_uart_writel(CDNS_UART_IXR_TOUT, CDNS_UART_IER_OFFSET);
+ writel(CDNS_UART_IXR_TOUT,
+ port->membase + CDNS_UART_IER_OFFSET);
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -1458,7 +1464,7 @@ static int cdns_uart_remove(struct platform_device *pdev)
}
/* Match table for of_platform binding */
-static struct of_device_id cdns_uart_of_match[] = {
+static const struct of_device_id cdns_uart_of_match[] = {
{ .compatible = "xlnx,xuartps", },
{ .compatible = "cdns,uart-r1p8", },
{}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.