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authorSonic Zhang <sonic.zhang@analog.com>2012-05-16 08:22:25 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-17 22:25:56 +0200
commit3c2d0ed221a22ce2c1c9fe1e2d6142374917642e (patch)
tree2cd3baf5f365b8cf0b6f5be019594f77b409d3c0 /drivers/tty
parentserial: bfin_uart: narrow the reboot condition in DMA tx interrupt (diff)
downloadlinux-3c2d0ed221a22ce2c1c9fe1e2d6142374917642e.tar.xz
linux-3c2d0ed221a22ce2c1c9fe1e2d6142374917642e.zip
serial: bfin_uart: RTS and CTS MMRs can be either 16-bit width or 32-bit width.
Change hardware flow control code to adapt to both bf5xx and bf60x. Disabled serial device before set termios for bf60x. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/bfin_uart.c22
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index 56b95b0447d9..7924ba6d5dfb 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -549,7 +549,7 @@ static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id)
static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id)
{
struct bfin_serial_port *uart = dev_id;
- unsigned short irqstat;
+ unsigned int irqstat;
int x_pos, pos;
spin_lock(&uart->rx_lock);
@@ -582,7 +582,7 @@ static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id)
static unsigned int bfin_serial_tx_empty(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- unsigned short lsr;
+ unsigned int lsr;
lsr = UART_GET_LSR(uart);
if (lsr & TEMT)
@@ -741,7 +741,7 @@ static int bfin_serial_startup(struct uart_port *port)
}
/* CTS RTS PINs are negative assertive. */
- UART_PUT_MCR(uart, ACTS);
+ UART_PUT_MCR(uart, UART_GET_MCR(uart) | ACTS);
UART_SET_IER(uart, EDSSI);
}
#endif
@@ -799,7 +799,7 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
unsigned long flags;
unsigned int baud, quot;
- unsigned short val, ier, lcr = 0;
+ unsigned int ier, lcr = 0;
switch (termios->c_cflag & CSIZE) {
case CS8:
@@ -871,6 +871,7 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
/* Disable UART */
ier = UART_GET_IER(uart);
+ UART_PUT_GCTL(uart, UART_GET_GCTL(uart) & ~UCEN);
UART_DISABLE_INTS(uart);
/* Set DLAB in LCR to Access CLK */
@@ -882,14 +883,11 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
/* Clear DLAB in LCR to Access THR RBR IER */
UART_CLEAR_DLAB(uart);
- UART_PUT_LCR(uart, lcr);
+ UART_PUT_LCR(uart, (UART_GET_LCR(uart) & ~LCR_MASK) | lcr);
/* Enable UART */
UART_ENABLE_INTS(uart, ier);
-
- val = UART_GET_GCTL(uart);
- val |= UCEN;
- UART_PUT_GCTL(uart, val);
+ UART_PUT_GCTL(uart, UART_GET_GCTL(uart) | UCEN);
/* Port speed changed, update the per-port timeout. */
uart_update_timeout(port, termios->c_cflag, baud);
@@ -949,7 +947,7 @@ bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
static void bfin_serial_set_ldisc(struct uart_port *port, int ld)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- unsigned short val;
+ unsigned int val;
switch (ld) {
case N_IRDA:
@@ -967,7 +965,7 @@ static void bfin_serial_set_ldisc(struct uart_port *port, int ld)
static void bfin_serial_reset_irda(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
- unsigned short val;
+ unsigned int val;
val = UART_GET_GCTL(uart);
val &= ~(UMOD_MASK | RPOLC);
@@ -1065,7 +1063,7 @@ static void __init
bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
int *parity, int *bits)
{
- unsigned short status;
+ unsigned int status;
status = UART_GET_IER(uart) & (ERBFI | ETBEI);
if (status == (ERBFI | ETBEI)) {