static void apbuart_rx_chars(struct uart_port *port)
{
unsigned int status, ch, rsr, flag;
unsigned int max_chars = port->fifosize;
status = UART_GET_STATUS(port);
while (UART_RX_DATA(status) && (max_chars--)) {
ch = UART_GET_CHAR(port);
flag = TTY_NORMAL;
port->icount.rx++;
rsr = UART_GET_STATUS(port) | UART_DUMMY_RSR_RX;
UART_PUT_STATUS(port, 0);
if (rsr & UART_STATUS_ERR) {
if (rsr & UART_STATUS_BR) {
rsr &= ~(UART_STATUS_FE | UART_STATUS_PE);
port->icount.brk++;
if (uart_handle_break(port))
goto ignore_char;
} else if (rsr & UART_STATUS_PE) {
port->icount.parity++;
} else if (rsr & UART_STATUS_FE) {
port->icount.frame++;
}
if (rsr & UART_STATUS_OE)
port->icount.overrun++;
rsr &= port->read_status_mask;
if (rsr & UART_STATUS_PE)
flag = TTY_PARITY;
else if (rsr & UART_STATUS_FE)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
uart_insert_char(port, rsr, UART_STATUS_OE, ch, flag);
ignore_char:
status = UART_GET_STATUS(port);
}
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
}
static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
unsigned int status, ch, lsr, flg, max_count = 256;
status = UART_GET_LSR(port); /* clears pending LSR interrupts */
while ((status & URLS_URDR) && max_count--) {
ch = UART_GET_CHAR(port);
flg = TTY_NORMAL;
port->icount.rx++;
/*
* Note that the error handling code is
* out of the main execution path
*/
lsr = UART_GET_LSR(port) | UART_DUMMY_LSR_RX;
if (unlikely(lsr & (URLS_URBI | URLS_URPE | URLS_URFE | URLS_URROE))) {
if (lsr & URLS_URBI) {
lsr &= ~(URLS_URFE | URLS_URPE);
port->icount.brk++;
if (uart_handle_break(port))
goto ignore_char;
}
if (lsr & URLS_URPE)
port->icount.parity++;
if (lsr & URLS_URFE)
port->icount.frame++;
if (lsr & URLS_URROE)
port->icount.overrun++;
lsr &= port->read_status_mask;
if (lsr & URLS_URBI)
flg = TTY_BREAK;
else if (lsr & URLS_URPE)
flg = TTY_PARITY;
else if (lsr & URLS_URFE)
flg = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
uart_insert_char(port, lsr, URLS_URROE, ch, flg);
ignore_char:
status = UART_GET_LSR(port);
}
tty_flip_buffer_push(&port->state->port);
return IRQ_HANDLED;
}
static irqreturn_t clps711xuart_int_rx(int irq, void *dev_id, struct pt_regs *regs)
{
struct uart_port *port = dev_id;
struct tty_struct *tty = port->info->tty;
unsigned int status, ch, flg;
status = clps_readl(SYSFLG(port));
while (!(status & SYSFLG_URXFE)) {
ch = clps_readl(UARTDR(port));
port->icount.rx++;
flg = TTY_NORMAL;
/*
* Note that the error handling code is
* out of the main execution path
*/
if (unlikely(ch & UART_ANY_ERR)) {
if (ch & UARTDR_PARERR)
port->icount.parity++;
else if (ch & UARTDR_FRMERR)
port->icount.frame++;
if (ch & UARTDR_OVERR)
port->icount.overrun++;
ch &= port->read_status_mask;
if (ch & UARTDR_PARERR)
flg = TTY_PARITY;
else if (ch & UARTDR_FRMERR)
flg = TTY_FRAME;
#ifdef SUPPORT_SYSRQ
port->sysrq = 0;
#endif
}
if (uart_handle_sysrq_char(port, ch, regs))
goto ignore_char;
/*
* CHECK: does overrun affect the current character?
* ASSUMPTION: it does not.
*/
uart_insert_char(port, ch, UARTDR_OVERR, ch, flg);
ignore_char:
status = clps_readl(SYSFLG(port));
}
tty_flip_buffer_push(tty);
return IRQ_HANDLED;
}
/*
* Characters received (called from interrupt handler)
*/
static void atmel_rx_chars(struct uart_port *port)
{
struct tty_struct *tty = port->info->tty;
unsigned int status, ch, flg;
status = UART_GET_CSR(port);
while (status & ATMEL_US_RXRDY) {
ch = UART_GET_CHAR(port);
port->icount.rx++;
flg = TTY_NORMAL;
/*
* note that the error handling code is
* out of the main execution path
*/
if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME | ATMEL_US_OVRE | ATMEL_US_RXBRK))) {
UART_PUT_CR(port, ATMEL_US_RSTSTA); /* clear error */
if (status & ATMEL_US_RXBRK) {
status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME); /* ignore side-effect */
port->icount.brk++;
if (uart_handle_break(port))
goto ignore_char;
}
if (status & ATMEL_US_PARE)
port->icount.parity++;
if (status & ATMEL_US_FRAME)
port->icount.frame++;
if (status & ATMEL_US_OVRE)
port->icount.overrun++;
status &= port->read_status_mask;
if (status & ATMEL_US_RXBRK)
flg = TTY_BREAK;
else if (status & ATMEL_US_PARE)
flg = TTY_PARITY;
else if (status & ATMEL_US_FRAME)
flg = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
uart_insert_char(port, status, ATMEL_US_OVRE, ch, flg);
ignore_char:
status = UART_GET_CSR(port);
}
tty_flip_buffer_push(tty);
}
static void pl010_rx_chars(struct uart_amba_port *uap)
{
unsigned int status, ch, flag, rsr, max_count = 256;
status = readb(uap->port.membase + UART01x_FR);
while (UART_RX_DATA(status) && max_count--) {
ch = readb(uap->port.membase + UART01x_DR);
flag = TTY_NORMAL;
uap->port.icount.rx++;
/*
* Note that the error handling code is
* out of the main execution path
*/
rsr = readb(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
if (unlikely(rsr & UART01x_RSR_ANY)) {
writel(0, uap->port.membase + UART01x_ECR);
if (rsr & UART01x_RSR_BE) {
rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE);
uap->port.icount.brk++;
if (uart_handle_break(&uap->port))
goto ignore_char;
} else if (rsr & UART01x_RSR_PE)
uap->port.icount.parity++;
else if (rsr & UART01x_RSR_FE)
uap->port.icount.frame++;
if (rsr & UART01x_RSR_OE)
uap->port.icount.overrun++;
rsr &= uap->port.read_status_mask;
if (rsr & UART01x_RSR_BE)
flag = TTY_BREAK;
else if (rsr & UART01x_RSR_PE)
flag = TTY_PARITY;
else if (rsr & UART01x_RSR_FE)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(&uap->port, ch))
goto ignore_char;
uart_insert_char(&uap->port, rsr, UART01x_RSR_OE, ch, flag);
ignore_char:
status = readb(uap->port.membase + UART01x_FR);
}
spin_unlock(&uap->port.lock);
tty_flip_buffer_push(&uap->port.state->port);
spin_lock(&uap->port.lock);
}
static void pl010_rx_chars(struct uart_port *port)
{
struct tty_struct *tty = port->info->tty;
unsigned int status, ch, flag, rsr, max_count = 256;
status = readb(port->membase + UART01x_FR);
while (UART_RX_DATA(status) && max_count--) {
ch = readb(port->membase + UART01x_DR);
flag = TTY_NORMAL;
port->icount.rx++;
/*
* Note that the error handling code is
* out of the main execution path
*/
rsr = readb(port->membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
if (unlikely(rsr & UART01x_RSR_ANY)) {
writel(0, port->membase + UART01x_ECR);
if (rsr & UART01x_RSR_BE) {
rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE);
port->icount.brk++;
if (uart_handle_break(port))
goto ignore_char;
} else if (rsr & UART01x_RSR_PE)
port->icount.parity++;
else if (rsr & UART01x_RSR_FE)
port->icount.frame++;
if (rsr & UART01x_RSR_OE)
port->icount.overrun++;
rsr &= port->read_status_mask;
if (rsr & UART01x_RSR_BE)
flag = TTY_BREAK;
else if (rsr & UART01x_RSR_PE)
flag = TTY_PARITY;
else if (rsr & UART01x_RSR_FE)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
uart_insert_char(port, rsr, UART01x_RSR_OE, ch, flag);
ignore_char:
status = readb(port->membase + UART01x_FR);
}
tty_flip_buffer_push(tty);
return;
}
static void
sa1100_rx_chars(struct sa1100_port *sport, struct pt_regs *regs)
{
struct tty_struct *tty = sport->port.info->tty;
unsigned int status, ch, flg;
status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
UTSR0_TO_SM(UART_GET_UTSR0(sport));
while (status & UTSR1_TO_SM(UTSR1_RNE)) {
ch = UART_GET_CHAR(sport);
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
goto ignore_char;
sport->port.icount.rx++;
flg = TTY_NORMAL;
/*
* note that the error handling code is
* out of the main execution path
*/
if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) {
if (status & UTSR1_TO_SM(UTSR1_PRE))
sport->port.icount.parity++;
else if (status & UTSR1_TO_SM(UTSR1_FRE))
sport->port.icount.frame++;
if (status & UTSR1_TO_SM(UTSR1_ROR))
sport->port.icount.overrun++;
status &= sport->port.read_status_mask;
if (status & UTSR1_TO_SM(UTSR1_PRE))
flg = TTY_PARITY;
else if (status & UTSR1_TO_SM(UTSR1_FRE))
flg = TTY_FRAME;
#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
#endif
}
if (uart_handle_sysrq_char(&sport->port, ch, regs))
goto ignore_char;
uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg);
ignore_char:
status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
UTSR0_TO_SM(UART_GET_UTSR0(sport));
}
tty_flip_buffer_push(tty);
}
static void
receive_chars(struct uart_port *up)
{
struct tty_struct *tty = up->info->tty;
unsigned int ch, flag;
int i,count;
unsigned short s;
unsigned char *rxptr;
int max_count = 256;
rxptr=dpram_data.data_virt+0x200;
s=REG6;
dprintk("REG6=0x%x\n", s);
count=s & 0x3ff;
if ((s & 0x1000) && count) {
dprintk("%d bytes data available\n", count);
for (i = 0 ; i < count ; i++) {
ch=*rxptr++;
flag = TTY_NORMAL;
up->icount.rx++;
uart_insert_char(up, 0, 0, ch, flag);
}
tty_flip_buffer_push(tty);
}
REG4|=0x800;
return;
do {
ch = 0; /* serial_in(up, UART_RX); */
flag = TTY_NORMAL;
up->icount.rx++;
uart_insert_char(up, 0, UART_LSR_OE, ch, flag);
} while ((max_count-- > 0));
tty_flip_buffer_push(tty);
}
static void pl011_rx_chars(struct uart_amba_port *uap)
{
struct tty_struct *tty = uap->port.info->tty;
unsigned int status, ch, flag, max_count = 256;
status = readw(uap->port.membase + UART01x_FR);
while ((status & UART01x_FR_RXFE) == 0 && max_count--) {
ch = readw(uap->port.membase + UART01x_DR) | UART_DUMMY_DR_RX;
flag = TTY_NORMAL;
uap->port.icount.rx++;
/*
* Note that the error handling code is
* out of the main execution path
*/
if (unlikely(ch & UART_DR_ERROR)) {
if (ch & UART011_DR_BE) {
ch &= ~(UART011_DR_FE | UART011_DR_PE);
uap->port.icount.brk++;
if (uart_handle_break(&uap->port))
goto ignore_char;
} else if (ch & UART011_DR_PE)
uap->port.icount.parity++;
else if (ch & UART011_DR_FE)
uap->port.icount.frame++;
if (ch & UART011_DR_OE)
uap->port.icount.overrun++;
ch &= uap->port.read_status_mask;
if (ch & UART011_DR_BE)
flag = TTY_BREAK;
else if (ch & UART011_DR_PE)
flag = TTY_PARITY;
else if (ch & UART011_DR_FE)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(&uap->port, ch & 255))
goto ignore_char;
uart_insert_char(&uap->port, ch, UART011_DR_OE, ch, flag);
ignore_char:
status = readw(uap->port.membase + UART01x_FR);
}
spin_unlock(&uap->port.lock);
tty_flip_buffer_push(tty);
spin_lock(&uap->port.lock);
}
static void sbd_receive_chars(struct sbd_port *sport)
{
struct uart_port *uport = &sport->port;
struct uart_icount *icount;
unsigned int status, ch, flag;
int count;
for (count = 16; count; count--) {
status = read_sbdchn(sport, R_DUART_STATUS);
if (!(status & M_DUART_RX_RDY))
break;
ch = read_sbdchn(sport, R_DUART_RX_HOLD);
flag = TTY_NORMAL;
icount = &uport->icount;
icount->rx++;
if (unlikely(status &
(M_DUART_RCVD_BRK | M_DUART_FRM_ERR |
M_DUART_PARITY_ERR | M_DUART_OVRUN_ERR))) {
if (status & M_DUART_RCVD_BRK) {
icount->brk++;
if (uart_handle_break(uport))
continue;
} else if (status & M_DUART_FRM_ERR)
icount->frame++;
else if (status & M_DUART_PARITY_ERR)
icount->parity++;
if (status & M_DUART_OVRUN_ERR)
icount->overrun++;
status &= uport->read_status_mask;
if (status & M_DUART_RCVD_BRK)
flag = TTY_BREAK;
else if (status & M_DUART_FRM_ERR)
flag = TTY_FRAME;
else if (status & M_DUART_PARITY_ERR)
flag = TTY_PARITY;
}
if (uart_handle_sysrq_char(uport, ch))
continue;
uart_insert_char(uport, status, M_DUART_OVRUN_ERR, ch, flag);
}
tty_flip_buffer_push(uport->state->port.tty);
}
static void altera_uart_rx_chars(struct altera_uart *pp)
{
struct uart_port *port = &pp->port;
unsigned char ch, flag;
unsigned short status;
while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) &
ALTERA_UART_STATUS_RRDY_MSK) {
ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG);
flag = TTY_NORMAL;
port->icount.rx++;
if (status & ALTERA_UART_STATUS_E_MSK) {
altera_uart_writel(port, status,
ALTERA_UART_STATUS_REG);
if (status & ALTERA_UART_STATUS_BRK_MSK) {
port->icount.brk++;
if (uart_handle_break(port))
continue;
} else if (status & ALTERA_UART_STATUS_PE_MSK) {
port->icount.parity++;
} else if (status & ALTERA_UART_STATUS_ROE_MSK) {
port->icount.overrun++;
} else if (status & ALTERA_UART_STATUS_FE_MSK) {
port->icount.frame++;
}
status &= port->read_status_mask;
if (status & ALTERA_UART_STATUS_BRK_MSK)
flag = TTY_BREAK;
else if (status & ALTERA_UART_STATUS_PE_MSK)
flag = TTY_PARITY;
else if (status & ALTERA_UART_STATUS_FE_MSK)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
continue;
uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch,
flag);
}
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
}
static void digicolor_uart_rx(struct uart_port *port)
{
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
while (1) {
u8 status, ch;
unsigned int ch_flag;
if (digicolor_uart_rx_empty(port))
break;
ch = readb_relaxed(port->membase + UA_EMI_REC);
status = readb_relaxed(port->membase + UA_STATUS);
port->icount.rx++;
ch_flag = TTY_NORMAL;
if (status) {
if (status & UA_STATUS_PARITY_ERR)
port->icount.parity++;
else if (status & UA_STATUS_FRAME_ERR)
port->icount.frame++;
else if (status & UA_STATUS_OVERRUN_ERR)
port->icount.overrun++;
status &= port->read_status_mask;
if (status & UA_STATUS_PARITY_ERR)
ch_flag = TTY_PARITY;
else if (status & UA_STATUS_FRAME_ERR)
ch_flag = TTY_FRAME;
else if (status & UA_STATUS_OVERRUN_ERR)
ch_flag = TTY_OVERRUN;
}
if (status & port->ignore_status_mask)
continue;
uart_insert_char(port, status, UA_STATUS_OVERRUN_ERR, ch,
ch_flag);
}
spin_unlock_irqrestore(&port->lock, flags);
tty_flip_buffer_push(&port->state->port);
}
static void milkymist_uart_rx_char(struct uart_port *port)
{
struct tty_port *tport = &port->state->port;
unsigned char ch;
ch = ioread32be(port->membase + UART_RXTX) & 0xff;
port->icount.rx++;
if (uart_handle_sysrq_char(port, ch))
goto ignore_char;
uart_insert_char(port, 0, 0, ch, TTY_NORMAL);
ignore_char:
tty_flip_buffer_push(tport);
}
static void serial_omap_rlsi(struct uart_omap_port *up, unsigned int lsr)
{
unsigned int flag;
unsigned char ch = 0;
if (likely(lsr & UART_LSR_DR))
ch = serial_in(up, UART_RX);
up->port.icount.rx++;
flag = TTY_NORMAL;
if (lsr & UART_LSR_BI) {
flag = TTY_BREAK;
lsr &= ~(UART_LSR_FE | UART_LSR_PE);
up->port.icount.brk++;
/*
* We do the SysRQ and SAK checking
* here because otherwise the break
* may get masked by ignore_status_mask
* or read_status_mask.
*/
if (uart_handle_break(&up->port))
return;
}
if (lsr & UART_LSR_PE) {
flag = TTY_PARITY;
up->port.icount.parity++;
}
if (lsr & UART_LSR_FE) {
flag = TTY_FRAME;
up->port.icount.frame++;
}
if (lsr & UART_LSR_OE)
up->port.icount.overrun++;
#ifdef CONFIG_SERIAL_OMAP_CONSOLE
if (up->port.line == up->port.cons->index) {
/* Recover the break flag from console xmit */
lsr |= up->lsr_break_flag;
}
#endif
uart_insert_char(&up->port, lsr, UART_LSR_OE, 0, flag);
}
static void
sa1100_rx_chars(struct sa1100_port *sport)
{
struct tty_struct *tty = sport->port.state->port.tty;
unsigned int status, ch, flg;
status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
UTSR0_TO_SM(UART_GET_UTSR0(sport));
while (status & UTSR1_TO_SM(UTSR1_RNE)) {
ch = UART_GET_CHAR(sport);
sport->port.icount.rx++;
flg = TTY_NORMAL;
if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) {
if (status & UTSR1_TO_SM(UTSR1_PRE))
sport->port.icount.parity++;
else if (status & UTSR1_TO_SM(UTSR1_FRE))
sport->port.icount.frame++;
if (status & UTSR1_TO_SM(UTSR1_ROR))
sport->port.icount.overrun++;
status &= sport->port.read_status_mask;
if (status & UTSR1_TO_SM(UTSR1_PRE))
flg = TTY_PARITY;
else if (status & UTSR1_TO_SM(UTSR1_FRE))
flg = TTY_FRAME;
#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
#endif
}
if (uart_handle_sysrq_char(&sport->port, ch))
goto ignore_char;
uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg);
ignore_char:
status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) |
UTSR0_TO_SM(UART_GET_UTSR0(sport));
}
tty_flip_buffer_push(tty);
}
static void serial_omap_rdi(struct uart_omap_port *up, unsigned int lsr)
{
unsigned char ch = 0;
unsigned int flag;
if (!(lsr & UART_LSR_DR))
return;
ch = serial_in(up, UART_RX);
flag = TTY_NORMAL;
up->port.icount.rx++;
if (uart_handle_sysrq_char(&up->port, ch))
return;
uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag);
}
static void lh7a40xuart_rx_chars (struct uart_port* port)
{
struct tty_struct* tty = port->info->tty;
int cbRxMax = 256; /* (Gross) limit on receive */
unsigned int data; /* Received data and status */
unsigned int flag;
while (!(UR (port, UART_R_STATUS) & nRxRdy) && --cbRxMax) {
data = UR (port, UART_R_DATA);
flag = TTY_NORMAL;
++port->icount.rx;
if (unlikely(data & RxError)) {
if (data & RxBreak) {
data &= ~(RxFramingError | RxParityError);
++port->icount.brk;
if (uart_handle_break (port))
continue;
}
else if (data & RxParityError)
++port->icount.parity;
else if (data & RxFramingError)
++port->icount.frame;
if (data & RxOverrunError)
++port->icount.overrun;
/* Mask by termios, leave Rx'd byte */
data &= port->read_status_mask | 0xff;
if (data & RxBreak)
flag = TTY_BREAK;
else if (data & RxParityError)
flag = TTY_PARITY;
else if (data & RxFramingError)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char (port, (unsigned char) data))
continue;
uart_insert_char(port, data, RxOverrunError, data, flag);
}
tty_flip_buffer_push (tty);
return;
}
static void mcf_rx_chars(struct mcf_uart *pp)
{
struct uart_port *port = &pp->port;
unsigned char status, ch, flag;
while ((status = readb(port->membase + MCFUART_USR)) & MCFUART_USR_RXREADY) {
ch = readb(port->membase + MCFUART_URB);
flag = TTY_NORMAL;
port->icount.rx++;
if (status & MCFUART_USR_RXERR) {
writeb(MCFUART_UCR_CMDRESETERR,
port->membase + MCFUART_UCR);
if (status & MCFUART_USR_RXBREAK) {
port->icount.brk++;
if (uart_handle_break(port))
continue;
} else if (status & MCFUART_USR_RXPARITY) {
port->icount.parity++;
} else if (status & MCFUART_USR_RXOVERRUN) {
port->icount.overrun++;
} else if (status & MCFUART_USR_RXFRAMING) {
port->icount.frame++;
}
status &= port->read_status_mask;
if (status & MCFUART_USR_RXBREAK)
flag = TTY_BREAK;
else if (status & MCFUART_USR_RXPARITY)
flag = TTY_PARITY;
else if (status & MCFUART_USR_RXFRAMING)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
continue;
uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag);
}
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
}
static void netx_rxint(struct uart_port *port)
{
unsigned char rx, flg, status;
struct tty_struct *tty = port->info->port.tty;
while (!(readl(port->membase + UART_FR) & FR_RXFE)) {
rx = readl(port->membase + UART_DR);
flg = TTY_NORMAL;
port->icount.rx++;
status = readl(port->membase + UART_SR);
if (status & SR_BE) {
writel(0, port->membase + UART_SR);
if (uart_handle_break(port))
continue;
}
if (unlikely(status & (SR_FE | SR_PE | SR_OE))) {
if (status & SR_PE)
port->icount.parity++;
else if (status & SR_FE)
port->icount.frame++;
if (status & SR_OE)
port->icount.overrun++;
status &= port->read_status_mask;
if (status & SR_BE)
flg = TTY_BREAK;
else if (status & SR_PE)
flg = TTY_PARITY;
else if (status & SR_FE)
flg = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, rx))
continue;
uart_insert_char(port, status, SR_OE, rx, flg);
}
tty_flip_buffer_push(tty);
return;
}
static void netx_rxint(struct uart_port *port, unsigned long *flags)
{
unsigned char rx, flg, status;
while (!(readl(port->membase + UART_FR) & FR_RXFE)) {
rx = readl(port->membase + UART_DR);
flg = TTY_NORMAL;
port->icount.rx++;
status = readl(port->membase + UART_SR);
if (status & SR_BE) {
writel(0, port->membase + UART_SR);
if (uart_handle_break(port))
continue;
}
if (unlikely(status & (SR_FE | SR_PE | SR_OE))) {
if (status & SR_PE)
port->icount.parity++;
else if (status & SR_FE)
port->icount.frame++;
if (status & SR_OE)
port->icount.overrun++;
status &= port->read_status_mask;
if (status & SR_BE)
flg = TTY_BREAK;
else if (status & SR_PE)
flg = TTY_PARITY;
else if (status & SR_FE)
flg = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, rx))
continue;
uart_insert_char(port, status, SR_OE, rx, flg);
}
spin_unlock_irqrestore(&port->lock, *flags);
tty_flip_buffer_push(&port->state->port);
spin_lock_irqsave(&port->lock, *flags);
}
static void mxs_auart_rx_char(struct mxs_auart_port *s)
{
int flag;
u32 stat;
u8 c;
c = readl(s->port.membase + AUART_DATA);
stat = readl(s->port.membase + AUART_STAT);
flag = TTY_NORMAL;
s->port.icount.rx++;
if (stat & AUART_STAT_BERR) {
s->port.icount.brk++;
if (uart_handle_break(&s->port))
goto out;
} else if (stat & AUART_STAT_PERR) {
s->port.icount.parity++;
} else if (stat & AUART_STAT_FERR) {
s->port.icount.frame++;
}
/*
* Mask off conditions which should be ingored.
*/
stat &= s->port.read_status_mask;
if (stat & AUART_STAT_BERR) {
flag = TTY_BREAK;
} else if (stat & AUART_STAT_PERR)
flag = TTY_PARITY;
else if (stat & AUART_STAT_FERR)
flag = TTY_FRAME;
if (stat & AUART_STAT_OERR)
s->port.icount.overrun++;
if (uart_handle_sysrq_char(&s->port, c))
goto out;
uart_insert_char(&s->port, stat, AUART_STAT_OERR, c, flag);
out:
writel(stat, s->port.membase + AUART_STAT);
}
static void altera_jtaguart_rx_chars(struct altera_jtaguart *pp)
{
struct uart_port *port = &pp->port;
unsigned char ch, flag;
unsigned long status;
while ((status = readl(port->membase + ALTERA_JTAGUART_DATA_REG)) &
ALTERA_JTAGUART_DATA_RVALID_MSK) {
ch = status & ALTERA_JTAGUART_DATA_DATA_MSK;
flag = TTY_NORMAL;
port->icount.rx++;
if (uart_handle_sysrq_char(port, ch))
continue;
uart_insert_char(port, 0, 0, ch, flag);
}
tty_flip_buffer_push(&port->state->port);
}
static void serial_omap_rdi(struct uart_omap_port *up, unsigned int lsr)
{
unsigned char ch = 0;
unsigned int flag;
if (!(lsr & UART_LSR_DR))
return;
ch = serial_in(up, UART_RX);
flag = TTY_NORMAL;
up->port.icount.rx++;
#ifdef CONFIG_CONSOLE_POLL
if (up->port.poll_rx_cb && up->port.poll_rx_cb(ch))
return;
#endif
if (uart_handle_sysrq_char(&up->port, ch))
return;
uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag);
}
static unsigned int
sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count)
{
unsigned int ch, rx_count = 0;
while (!(rd_regl(port, SIRFUART_RX_FIFO_STATUS) &
SIRFUART_FIFOEMPTY_MASK(port))) {
ch = rd_regl(port, SIRFUART_RX_FIFO_DATA) | SIRFUART_DUMMY_READ;
if (unlikely(uart_handle_sysrq_char(port, ch)))
continue;
uart_insert_char(port, 0, 0, ch, TTY_NORMAL);
rx_count++;
if (rx_count >= max_rx_count)
break;
}
port->icount.rx += rx_count;
tty_flip_buffer_push(&port->state->port);
return rx_count;
}
static inline void sprd_rx(struct uart_port *port)
{
struct tty_port *tty = &port->state->port;
unsigned int ch, flag, lsr, max_count = SPRD_TIMEOUT;
while ((serial_in(port, SPRD_STS1) & 0x00ff) && max_count--) {
lsr = serial_in(port, SPRD_LSR);
ch = serial_in(port, SPRD_RXD);
flag = TTY_NORMAL;
port->icount.rx++;
if (lsr & (SPRD_LSR_BI | SPRD_LSR_PE |
SPRD_LSR_FE | SPRD_LSR_OE))
if (handle_lsr_errors(port, &lsr, &flag))
continue;
if (uart_handle_sysrq_char(port, ch))
continue;
uart_insert_char(port, lsr, SPRD_LSR_OE, ch, flag);
}
tty_flip_buffer_push(tty);
}
/*
* Characters received (called from interrupt handler)
*/
static void rk2818_rx_chars(struct uart_port *port)
{
unsigned int ch, flag;
while((rk2818_uart_read(port,UART_USR) & UART_RECEIVE_FIFO_NOT_EMPTY) == UART_RECEIVE_FIFO_NOT_EMPTY)
{
u32 lsr = rk2818_uart_read(port, UART_LSR);
ch = rk2818_uart_read(port,UART_RBR);
flag = TTY_NORMAL;
port->icount.rx++;
if (lsr & UART_BREAK_INT_BIT) {
port->icount.brk++;
if (uart_handle_break(port))
continue;
}
if (uart_handle_sysrq_char(port, ch))
{
continue;
}
uart_insert_char(port, 0, 0, ch, flag);
}
tty_flip_buffer_push(port->state->port.tty);
}
/**
* xuartps_isr - Interrupt handler
* @irq: Irq number
* @dev_id: Id of the port
*
* Returns IRQHANDLED
**/
static irqreturn_t xuartps_isr(int irq, void *dev_id)
{
struct uart_port *port = (struct uart_port *)dev_id;
unsigned long flags;
unsigned int isrstatus, numbytes;
unsigned int data;
char status = TTY_NORMAL;
spin_lock_irqsave(&port->lock, flags);
/* Read the interrupt status register to determine which
* interrupt(s) is/are active.
*/
isrstatus = xuartps_readl(XUARTPS_ISR_OFFSET);
/* drop byte with parity error if IGNPAR specified */
if (isrstatus & port->ignore_status_mask & XUARTPS_IXR_PARITY)
isrstatus &= ~(XUARTPS_IXR_RXTRIG | XUARTPS_IXR_TOUT);
isrstatus &= port->read_status_mask;
isrstatus &= ~port->ignore_status_mask;
if ((isrstatus & XUARTPS_IXR_TOUT) ||
(isrstatus & XUARTPS_IXR_RXTRIG)) {
/* Receive Timeout Interrupt */
while ((xuartps_readl(XUARTPS_SR_OFFSET) &
XUARTPS_SR_RXEMPTY) != XUARTPS_SR_RXEMPTY) {
data = xuartps_readl(XUARTPS_FIFO_OFFSET);
port->icount.rx++;
if (isrstatus & XUARTPS_IXR_PARITY) {
port->icount.parity++;
status = TTY_PARITY;
} else if (isrstatus & XUARTPS_IXR_FRAMING) {
port->icount.frame++;
status = TTY_FRAME;
} else if (isrstatus & XUARTPS_IXR_OVERRUN)
port->icount.overrun++;
uart_insert_char(port, isrstatus, XUARTPS_IXR_OVERRUN,
data, status);
}
spin_unlock(&port->lock);
tty_flip_buffer_push(&port->state->port);
spin_lock(&port->lock);
}
/* Dispatch an appropriate handler */
if ((isrstatus & XUARTPS_IXR_TXEMPTY) == XUARTPS_IXR_TXEMPTY) {
if (uart_circ_empty(&port->state->xmit)) {
xuartps_writel(XUARTPS_IXR_TXEMPTY,
XUARTPS_IDR_OFFSET);
} else {
numbytes = port->fifosize;
/* Break if no more data available in the UART buffer */
while (numbytes--) {
if (uart_circ_empty(&port->state->xmit))
break;
/* Get the data from the UART circular buffer
* and write it to the xuartps's TX_FIFO
* register.
*/
xuartps_writel(
port->state->xmit.buf[port->state->xmit.
tail], XUARTPS_FIFO_OFFSET);
port->icount.tx++;
/* Adjust the tail of the UART buffer and wrap
* the buffer if it reaches limit.
*/
port->state->xmit.tail =
(port->state->xmit.tail + 1) & \
(UART_XMIT_SIZE - 1);
}
if (uart_circ_chars_pending(
&port->state->xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
}
}
xuartps_writel(isrstatus, XUARTPS_ISR_OFFSET);
/* be sure to release the lock and tty before leaving */
spin_unlock_irqrestore(&port->lock, flags);
return IRQ_HANDLED;
}
static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport)
{
struct uart_port *port = &ourport->port;
unsigned int ufcon, ch, flag, ufstat, uerstat;
unsigned int fifocnt = 0;
int max_count = port->fifosize;
while (max_count-- > 0) {
/*
* Receive all characters known to be in FIFO
* before reading FIFO level again
*/
if (fifocnt == 0) {
ufstat = rd_regl(port, S3C2410_UFSTAT);
fifocnt = s3c24xx_serial_rx_fifocnt(ourport, ufstat);
if (fifocnt == 0)
break;
}
fifocnt--;
uerstat = rd_regl(port, S3C2410_UERSTAT);
ch = rd_regb(port, S3C2410_URXH);
if (port->flags & UPF_CONS_FLOW) {
int txe = s3c24xx_serial_txempty_nofifo(port);
if (rx_enabled(port)) {
if (!txe) {
rx_enabled(port) = 0;
continue;
}
} else {
if (txe) {
ufcon = rd_regl(port, S3C2410_UFCON);
ufcon |= S3C2410_UFCON_RESETRX;
wr_regl(port, S3C2410_UFCON, ufcon);
rx_enabled(port) = 1;
return;
}
continue;
}
}
/* insert the character into the buffer */
flag = TTY_NORMAL;
port->icount.rx++;
if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) {
dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n",
ch, uerstat);
/* check for break */
if (uerstat & S3C2410_UERSTAT_BREAK) {
dbg("break!\n");
port->icount.brk++;
if (uart_handle_break(port))
continue; /* Ignore character */
}
if (uerstat & S3C2410_UERSTAT_FRAME)
port->icount.frame++;
if (uerstat & S3C2410_UERSTAT_OVERRUN)
port->icount.overrun++;
uerstat &= port->read_status_mask;
if (uerstat & S3C2410_UERSTAT_BREAK)
flag = TTY_BREAK;
else if (uerstat & S3C2410_UERSTAT_PARITY)
flag = TTY_PARITY;
else if (uerstat & (S3C2410_UERSTAT_FRAME |
S3C2410_UERSTAT_OVERRUN))
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(port, ch))
continue; /* Ignore character */
uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN,
ch, flag);
}
tty_flip_buffer_push(&port->state->port);
}
static inline void receive_chars(struct uart_omap_port *up, int *status)
{
struct tty_struct *tty = up->port.state->port.tty;
unsigned int flag;
unsigned char ch, lsr = *status;
int max_count = 256;
do {
if (likely(lsr & UART_LSR_DR))
ch = serial_in(up, UART_RX);
flag = TTY_NORMAL;
up->port.icount.rx++;
if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) {
/*
* For statistics only
*/
if (lsr & UART_LSR_BI) {
lsr &= ~(UART_LSR_FE | UART_LSR_PE);
up->port.icount.brk++;
/*
* We do the SysRQ and SAK checking
* here because otherwise the break
* may get masked by ignore_status_mask
* or read_status_mask.
*/
if (uart_handle_break(&up->port))
goto ignore_char;
} else if (lsr & UART_LSR_PE) {
up->port.icount.parity++;
} else if (lsr & UART_LSR_FE) {
up->port.icount.frame++;
}
if (lsr & UART_LSR_OE)
up->port.icount.overrun++;
/*
* Mask off conditions which should be ignored.
*/
lsr &= up->port.read_status_mask;
#ifdef CONFIG_SERIAL_OMAP_CONSOLE
if (up->port.line == up->port.cons->index) {
/* Recover the break flag from console xmit */
lsr |= up->lsr_break_flag;
}
#endif
if (lsr & UART_LSR_BI)
flag = TTY_BREAK;
else if (lsr & UART_LSR_PE)
flag = TTY_PARITY;
else if (lsr & UART_LSR_FE)
flag = TTY_FRAME;
}
if (uart_handle_sysrq_char(&up->port, ch))
goto ignore_char;
uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag);
ignore_char:
lsr = serial_in(up, UART_LSR);
} while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (max_count-- > 0));
spin_unlock(&up->port.lock);
tty_flip_buffer_push(tty);
spin_lock(&up->port.lock);
}
void stmp_appuart_rx(struct stmp_appuart_port *s, u8 *rx_buffer, int count)
{
u8 c;
int flag;
struct tty_struct *tty = s->port.info->port.tty;
u32 stat;
spin_lock(&s->lock);
stat = HW_UARTAPP_STAT_RD_NB(s->mem);
if (count < 0) {
count = HW_UARTAPP_STAT_RD_NB(s->mem) & BM_UARTAPP_STAT_RXCOUNT;
dev_dbg(s->dev, "count = %d\n", count);
}
for (;;) {
if (!rx_buffer) {
if (stat & BM_UARTAPP_STAT_RXFE)
break;
c = HW_UARTAPP_DATA_RD_NB(s->mem) & 0xFF;
} else {
if (count-- <= 0)
break;
c = *rx_buffer++;
dev_dbg(s->dev, "Received: %x(%c)\n", c, chr(c));
}
flag = TTY_NORMAL;
if (stat & BM_UARTAPP_STAT_BERR) {
stat &= ~BM_UARTAPP_STAT_BERR;
s->port.icount.brk++;
if (uart_handle_break(&s->port))
goto ignore;
flag = TTY_BREAK;
} else if (stat & BM_UARTAPP_STAT_PERR) {
stat &= ~BM_UARTAPP_STAT_PERR;
s->port.icount.parity++;
flag = TTY_PARITY;
} else if (stat & BM_UARTAPP_STAT_FERR) {
stat &= ~BM_UARTAPP_STAT_FERR;
s->port.icount.frame++;
flag = TTY_FRAME;
}
if (stat & BM_UARTAPP_STAT_OERR)
s->port.icount.overrun++;
if (uart_handle_sysrq_char(&s->port, c))
goto ignore;
uart_insert_char(&s->port, stat,
BM_UARTAPP_STAT_OERR, c, flag);
ignore:
if (pio_mode) {
HW_UARTAPP_STAT_WR_NB(s->mem, stat);
stat = HW_UARTAPP_STAT_RD_NB(s->mem);
}
}
HW_UARTAPP_STAT_WR_NB(s->mem, stat);
tty_flip_buffer_push(tty);
spin_unlock(&s->lock);
}