static void ambauart_enable_ms(struct uart_port *port)
{
#if DEBUG
printk("ambauart_enable_ms() called\n");
#endif
UART_PUT_IER(port, UART_GET_IER(port) | KS8695_INT_ENABLE_MODEM);
}
static int bfin_sir_is_receiving(struct net_device *dev)
{
struct bfin_sir_self *self = netdev_priv(dev);
struct bfin_sir_port *port = self->sir_port;
if (!(UART_GET_IER(port) & ERBFI))
return 0;
return self->rx_buff.state != OUTSIDE_FRAME;
}
static void ambauart_stop_rx(struct uart_port *port)
{
unsigned int ier;
#if DEBUG
printk("ambauart_stop_rx() called\n");
#endif
ier = UART_GET_IER(port);
ier &= ~KS8695_INT_ENABLE_RX;
UART_PUT_IER(port, ier);
}
static void ssauart_stop_rx (struct uart_port *port)
{
unsigned int ier;
unsigned long flags;
local_irq_save (flags); /* AMcCurdy: added paranoid irq protection */
ier = UART_GET_IER(port);
ier &= ~(1 << 0); /* disable Rx interrupts */
UART_PUT_IER(port, ier);
local_irq_restore (flags);
}
static int ambauart_startup(struct uart_port *port)
{
int retval;
#if DEBUG
printk("ambauart_startup ier=%x\n",UART_GET_IER(port));
#endif
/*
* Allocate the IRQ, let IRQ KS8695_INT_UART_RX, KS8695_INT_UART_TX comes to same
* routine
*/
UART_PUT_IER(port, UART_GET_IER(port) & 0xFFFFF0FF);
retval = request_irq(KS8695_INT_UART_TX, ambauart_int, SA_SHIRQ | SA_INTERRUPT, "amba", port);
if (retval)
return retval;
retval = request_irq(KS8695_INT_UART_RX, ambauart_int, SA_SHIRQ | SA_INTERRUPT, "amba", port);
if (retval)
return retval;
retval = request_irq(KS8695_INT_UART_LINE_ERR, ambauart_int, SA_SHIRQ | SA_INTERRUPT, "amba", port);
if (retval)
return retval;
retval = request_irq(KS8695_INT_UART_MODEMS, ambauart_int, SA_SHIRQ | SA_INTERRUPT, "amba", port);
if (retval)
return retval;
/*
* Finally, enable interrupts
*/
UART_PUT_IER(port, ((UART_GET_IER(port) & 0xFFFFF0FF) | KS8695_INT_ENABLE_RX | 0x800 | 0x400));
return 0;
}
static void ssauart_start_tx (struct uart_port *port, unsigned int from_tty)
{
unsigned int ier;
unsigned long flags;
local_irq_save (flags); /* AMcCurdy: added paranoid irq protection */
ier = UART_GET_IER(port);
ier |= (1 << 1); /* enable Tx interrupts */
UART_PUT_IER(port, ier);
/* We may have something in the buffer already */
ssauart_tx_one_char (port);
local_irq_restore (flags);
}
static void ssauart_enable_ms (struct uart_port *port)
{
#if 0
unsigned int ier;
unsigned long flags;
local_irq_save (flags); /* AMcCurdy: added paranoid irq protection */
ier = UART_GET_IER(port);
ier |= (1 << 3); /* enable Modem Status interrupts */
UART_PUT_IER(port, ier);
local_irq_restore (flags);
#endif
}
static void ambauart_start_tx(struct uart_port *port, unsigned int tty_start)
{
unsigned int ier;
#if DEBUG
printk("ambauart_start_tx() called\n");
#endif
ier = UART_GET_IER(port);
if ( ier & KS8695_INT_ENABLE_TX )
return;
else
{
ier |= KS8695_INT_ENABLE_TX;
UART_PUT_IER(port, ier);
}
}
static void ambauart_shutdown(struct uart_port *port)
{
#if DEBUG
printk("ambauart_shutdown\n");
#endif
/*
* disable all interrupts, disable the port
*/
UART_PUT_IER(port, UART_GET_IER(port) & 0xFFFFF0FF);
/* disable break condition and fifos */
UART_PUT_LCR(port, UART_GET_LCR(port) & ~KS8695_UART_LINEC_BRK);
UART_PUT_FCR(port, UART_GET_FCR(port) & ~KS8695_UART_FIFO_FEN);
free_irq(KS8695_INT_UART_RX, port);
free_irq(KS8695_INT_UART_TX, port);
free_irq(KS8695_INT_UART_MODEMS, port);
free_irq(KS8695_INT_UART_LINE_ERR, port);
}
/*
* If the port was already initialised (eg, by a boot loader),
* try to determine the current setup.
*/
static void __init
bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud,
int *parity, int *bits)
{
unsigned short status;
status = UART_GET_IER(uart) & (ERBFI | ETBEI);
if (status == (ERBFI | ETBEI)) {
/* ok, the port was enabled */
u16 lcr, dlh, dll;
lcr = UART_GET_LCR(uart);
*parity = 'n';
if (lcr & PEN) {
if (lcr & EPS)
*parity = 'e';
else
*parity = 'o';
}
switch (lcr & 0x03) {
case 0: *bits = 5; break;
case 1: *bits = 6; break;
case 2: *bits = 7; break;
case 3: *bits = 8; break;
}
/* Set DLAB in LCR to Access DLL and DLH */
UART_SET_DLAB(uart);
dll = UART_GET_DLL(uart);
dlh = UART_GET_DLH(uart);
/* Clear DLAB in LCR to Access THR RBR IER */
UART_CLEAR_DLAB(uart);
*baud = get_sclk() / (16*(dll | dlh << 8));
}
pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __func__, *baud, *parity, *bits);
}
static void ambauart_change_speed(struct uart_port *port, u_int cflag, u_int iflag, u_int quot)
{
u_int lcr, old_ier, fcr=0;
unsigned long flags;
#if DEBUG
printk("ambauart_set_cflag(0x%x) called\n", cflag);
#endif
//printk("ambauart_change_speed\n");
/* byte size and parity */
switch (cflag & CSIZE) {
case CS5: lcr = KS8695_UART_LINEC_WLEN5; break;
case CS6: lcr = KS8695_UART_LINEC_WLEN6; break;
case CS7: lcr = KS8695_UART_LINEC_WLEN7; break;
default: lcr = KS8695_UART_LINEC_WLEN8; break; // CS8
}
if (cflag & CSTOPB)
lcr |= KS8695_UART_LINEC_STP2;
if (cflag & PARENB) {
lcr |= KS8695_UART_LINEC_PEN;
if (!(cflag & PARODD))
lcr |= KS8695_UART_LINEC_EPS;
}
if (port->fifosize > 1)
fcr = KS8695_UART_FIFO_TRIG04 | KS8695_UART_FIFO_TXRST | KS8695_UART_FIFO_RXRST | KS8695_UART_FIFO_FEN;
port->read_status_mask = KS8695_UART_LINES_OE;
if (iflag & INPCK)
port->read_status_mask |= (KS8695_UART_LINES_FE | KS8695_UART_LINES_PE);
if (iflag & (BRKINT | PARMRK))
port->read_status_mask |= KS8695_UART_LINES_BE;
/*
* Characters to ignore
*/
port->ignore_status_mask = 0;
if (iflag & IGNPAR)
port->ignore_status_mask |= (KS8695_UART_LINES_FE | KS8695_UART_LINES_PE);
if (iflag & IGNBRK) {
port->ignore_status_mask |= KS8695_UART_LINES_BE;
/*
* If we're ignoring parity and break indicators,
* ignore overruns too (for real raw support).
*/
if (iflag & IGNPAR)
port->ignore_status_mask |= KS8695_UART_LINES_OE;
}
/*
* Ignore all characters if CREAD is not set.
*/
if ((cflag & CREAD) == 0)
port->ignore_status_mask |= UART_DUMMY_LSR_RX;
/* first, disable everything */
save_flags(flags); cli();
old_ier = UART_GET_IER(port);
UART_PUT_IER(port, old_ier & 0xFFFFF0FF);
old_ier &= ~KS8695_INT_ENABLE_MODEM;
if ((port->flags & ASYNC_HARDPPS_CD) ||
(cflag & CRTSCTS) || !(cflag & CLOCAL))
old_ier |= KS8695_INT_ENABLE_MODEM;
/* Set baud rate */
// UART_PUT_BRDR(port, port->uartclk / quot);
UART_PUT_BRDR(port, 0x28B);
UART_PUT_LCR(port, lcr);
UART_PUT_FCR(port, fcr);
UART_PUT_IER(port, old_ier & 0xFFFFFEFF);
restore_flags(flags);
}
static void ambauart_int(int irq, void *dev_id, struct pt_regs *regs)
{
struct uart_port *port = dev_id;
struct uart_info *info = port->info;
unsigned int status, ier, old_ier, count, lsr;
old_ier = UART_GET_IER(port);
UART_PUT_IER(port, (old_ier & 0xFFFFF0FF));
status = UART_GET_INT_STATUS(port);
lsr = UART_GET_LSR(port);
/* KS8695_INTMASK_UART_RX is not set during breakpoint as it should (looks
* like a HW bug), so we specifically check for a breakpoint condition in
* the UART line status register.
* Some bits from the UART line status register are cleared only when they
* are read by CPU. That is why we cannot read the line status register
* twice, and should pass the first read as argument to ambauart_rx_chars.
* Refer to CENTAUR KS8695PX's Register Description document:
* KS8695PX_REG_DESCP_v1.0.pdf, page 58: "UART Line Status Register".
*/
if (status & KS8695_INTMASK_UART_RX || lsr & KS8695_UART_LINES_BE)
{
#ifdef SUPPORT_SYSRQ
ambauart_rx_chars(port, regs, lsr);
#else
ambauart_rx_chars(port, lsr);
#endif
}
if (status & KS8695_INTMASK_UART_TX)
{
if (port->x_char)
{
UART_CLR_INT_STATUS(port, KS8695_INTMASK_UART_TX);
UART_PUT_CHAR(port, (u_int) port->x_char);
port->icount.tx++;
port->x_char = 0;
ier = UART_GET_IER(port);
ier &= 0xFFFFFEFF;
UART_PUT_IER(port, ier);
printk("XOn/Off sent\n");
return;
}
for ( count = 0; count < 16; count++)
{
if (info->xmit.head == info->xmit.tail)
{
/*ier = UART_GET_IER(port);
ier &= 0xFFFFFEFF;
UART_PUT_IER(port, ier);*/
break;
}
UART_CLR_INT_STATUS(port, KS8695_INTMASK_UART_TX);
UART_PUT_CHAR(port, (u_int) (info->xmit.buf[info->xmit.tail]));
info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
};
if (CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (info->xmit.head == info->xmit.tail)
{
ier = UART_GET_IER(port);
ier &= 0xFFFFFEFF;
UART_PUT_IER(port, ier);
}
}
if (status & KS8695_INTMASK_UART_MODEMS)
{
ambauart_modem_status(port);
}
if (status & KS8695_INTMASK_UART_MODEMS)
{
ambauart_modem_status(port);
}
if ( status & KS8695_INTMASK_UART_LINE_ERR)
{
UART_GET_LSR(port);
}
if (info->xmit.head == info->xmit.tail)
UART_PUT_IER(port, (old_ier & 0xFFFFFEFF));
else
UART_PUT_IER(port, old_ier | KS8695_INTMASK_UART_TX);
}
static void
bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
unsigned long flags;
unsigned int baud, quot;
unsigned short val, ier, lcr = 0;
switch (termios->c_cflag & CSIZE) {
case CS8:
lcr = WLS(8);
break;
case CS7:
lcr = WLS(7);
break;
case CS6:
lcr = WLS(6);
break;
case CS5:
lcr = WLS(5);
break;
default:
printk(KERN_ERR "%s: word lengh not supported\n",
__func__);
}
if (termios->c_cflag & CSTOPB)
lcr |= STB;
if (termios->c_cflag & PARENB)
lcr |= PEN;
if (!(termios->c_cflag & PARODD))
lcr |= EPS;
if (termios->c_cflag & CMSPAR)
lcr |= STP;
port->read_status_mask = OE;
if (termios->c_iflag & INPCK)
port->read_status_mask |= (FE | PE);
if (termios->c_iflag & (BRKINT | PARMRK))
port->read_status_mask |= BI;
/*
* Characters to ignore
*/
port->ignore_status_mask = 0;
if (termios->c_iflag & IGNPAR)
port->ignore_status_mask |= FE | PE;
if (termios->c_iflag & IGNBRK) {
port->ignore_status_mask |= BI;
/*
* If we're ignoring parity and break indicators,
* ignore overruns too (for real raw support).
*/
if (termios->c_iflag & IGNPAR)
port->ignore_status_mask |= OE;
}
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
quot = uart_get_divisor(port, baud);
spin_lock_irqsave(&uart->port.lock, flags);
UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15);
/* Disable UART */
ier = UART_GET_IER(uart);
UART_DISABLE_INTS(uart);
/* Set DLAB in LCR to Access DLL and DLH */
UART_SET_DLAB(uart);
UART_PUT_DLL(uart, quot & 0xFF);
UART_PUT_DLH(uart, (quot >> 8) & 0xFF);
SSYNC();
/* Clear DLAB in LCR to Access THR RBR IER */
UART_CLEAR_DLAB(uart);
UART_PUT_LCR(uart, lcr);
/* Enable UART */
UART_ENABLE_INTS(uart, ier);
val = UART_GET_GCTL(uart);
val |= UCEN;
UART_PUT_GCTL(uart, val);
/* Port speed changed, update the per-port timeout. */
uart_update_timeout(port, termios->c_cflag, baud);
spin_unlock_irqrestore(&uart->port.lock, flags);
}
