static void bfin_sir_send_work(struct work_struct *work)
{
struct bfin_sir_self *self = container_of(work, struct bfin_sir_self, work);
struct net_device *dev = self->sir_port->dev;
struct bfin_sir_port *port = self->sir_port;
unsigned short val;
int tx_cnt = 10;
while (bfin_sir_is_receiving(dev) && --tx_cnt)
turnaround_delay(dev->last_rx, self->mtt);
bfin_sir_stop_rx(port);
/* To avoid losting RX interrupt, we reset IR function before
* sending data. We also can set the speed, which will
* reset all the UART.
*/
val = UART_GET_GCTL(port);
val &= ~(IREN | RPOLC);
UART_PUT_GCTL(port, val);
SSYNC();
val |= IREN | RPOLC;
UART_PUT_GCTL(port, val);
SSYNC();
/* bfin_sir_set_speed(port, self->speed); */
#ifdef CONFIG_SIR_BFIN_DMA
bfin_sir_dma_tx_chars(dev);
#endif
bfin_sir_enable_tx(port);
dev->trans_start = jiffies;
}
static void bfin_serial_reset_irda(struct uart_port *port)
{
int line = port->line;
unsigned short val;
val = UART_GET_GCTL(&bfin_serial_ports[line]);
val &= ~(IREN | RPOLC);
UART_PUT_GCTL(&bfin_serial_ports[line], val);
SSYNC();
val |= (IREN | RPOLC);
UART_PUT_GCTL(&bfin_serial_ports[line], val);
SSYNC();
}
static void bfin_serial_reset_irda(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
unsigned short val;
val = UART_GET_GCTL(uart);
val &= ~(IREN | RPOLC);
UART_PUT_GCTL(uart, val);
SSYNC();
val |= (IREN | RPOLC);
UART_PUT_GCTL(uart, val);
SSYNC();
}
/*
* Enable the IrDA function if tty->ldisc.num is N_IRDA.
* In other cases, disable IrDA function.
*/
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;
switch (ld) {
case N_IRDA:
val = UART_GET_GCTL(uart);
val |= (IREN | RPOLC);
UART_PUT_GCTL(uart, val);
break;
default:
val = UART_GET_GCTL(uart);
val &= ~(IREN | RPOLC);
UART_PUT_GCTL(uart, val);
}
}
/*
* Enable the IrDA function if tty->ldisc.num is N_IRDA.
* In other cases, disable IrDA function.
*/
static void bfin_serial_set_ldisc(struct uart_port *port)
{
int line = port->line;
unsigned short val;
if (line >= port->info->port.tty->driver->num)
return;
switch (port->info->port.tty->termios->c_line) {
case N_IRDA:
val = UART_GET_GCTL(&bfin_serial_ports[line]);
val |= (IREN | RPOLC);
UART_PUT_GCTL(&bfin_serial_ports[line], val);
break;
default:
val = UART_GET_GCTL(&bfin_serial_ports[line]);
val &= ~(IREN | RPOLC);
UART_PUT_GCTL(&bfin_serial_ports[line], val);
}
}
static void bfin_sir_shutdown(struct bfin_sir_port *port, struct net_device *dev)
{
unsigned short val;
bfin_sir_stop_rx(port);
val = UART_GET_GCTL(port);
val &= ~(UCEN | IREN | RPOLC);
UART_PUT_GCTL(port, val);
#ifdef CONFIG_SIR_BFIN_DMA
disable_dma(port->tx_dma_channel);
disable_dma(port->rx_dma_channel);
del_timer(&(port->rx_dma_timer));
dma_free_coherent(NULL, PAGE_SIZE, port->rx_dma_buf.buf, 0);
#else
free_irq(port->irq+1, dev);
free_irq(port->irq, dev);
#endif
free_dma(port->tx_dma_channel);
free_dma(port->rx_dma_channel);
}
static int bfin_sir_set_speed(struct bfin_sir_port *port, int speed)
{
int ret = -EINVAL;
unsigned int quot;
unsigned short val, lsr, lcr;
static int utime;
int count = 10;
lcr = WLS(8);
switch (speed) {
case 9600:
case 19200:
case 38400:
case 57600:
case 115200:
/*
* IRDA is not affected by anomaly 05000230, so there is no
* need to tweak the divisor like he UART driver (which will
* slightly speed up the baud rate on us).
*/
quot = (port->clk + (8 * speed)) / (16 * speed);
do {
udelay(utime);
lsr = UART_GET_LSR(port);
} while (!(lsr & TEMT) && count--);
/* The useconds for 1 bits to transmit */
utime = 1000000 / speed + 1;
/* Clear UCEN bit to reset the UART state machine
* and control registers
*/
val = UART_GET_GCTL(port);
val &= ~UCEN;
UART_PUT_GCTL(port, val);
/* Set DLAB in LCR to Access THR RBR IER */
UART_SET_DLAB(port);
SSYNC();
UART_PUT_DLL(port, quot & 0xFF);
UART_PUT_DLH(port, (quot >> 8) & 0xFF);
SSYNC();
/* Clear DLAB in LCR */
UART_CLEAR_DLAB(port);
SSYNC();
UART_PUT_LCR(port, lcr);
val = UART_GET_GCTL(port);
val |= UCEN;
UART_PUT_GCTL(port, val);
ret = 0;
break;
default:
printk(KERN_WARNING "bfin_sir: Invalid speed %d\n", speed);
break;
}
val = UART_GET_GCTL(port);
/* If not add the 'RPOLC', we can't catch the receive interrupt.
* It's related with the HW layout and the IR transiver.
*/
val |= IREN | RPOLC;
UART_PUT_GCTL(port, val);
return ret;
}
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);
}
