static void clps711xuart_stop_tx(struct uart_port *port)
{
if (tx_enabled(port)) {
disable_irq(TX_IRQ(port));
tx_enabled(port) = 0;
}
}
static void s3c_serial_shutdown(struct uart_port *port)
{
struct s3c_uart_port *ourport = to_ourport(port);
#ifdef UART_HAS_INTMSK
if (ourport->tx_claimed || ourport->rx_claimed) {
free_irq(UART_IRQ(port), ourport);
ourport->tx_claimed = 0;
ourport->rx_claimed = 0;
tx_enabled(port) = 0;
rx_enabled(port) = 0;
}
#else
if (ourport->tx_claimed) {
free_irq(TX_IRQ(port), ourport);
tx_enabled(port) = 0;
ourport->tx_claimed = 0;
}
if (ourport->rx_claimed) {
free_irq(RX_IRQ(port), ourport);
ourport->rx_claimed = 0;
rx_enabled(port) = 0;
}
#endif
}
static void clps711xuart_start_tx(struct uart_port *port)
{
if (!tx_enabled(port)) {
enable_irq(TX_IRQ(port));
tx_enabled(port) = 1;
}
}
static void s3c24xx_serial_stop_tx(struct uart_port *port)
{
if (tx_enabled(port)) {
disable_irq(TX_IRQ(port));
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_enable(port);
}
}
static void s3c24xx_serial_stop_tx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (tx_enabled(port)) {
disable_irq_nosync(ourport->tx_irq);
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_enable(port);
}
}
static void
s3c24xx_serial_start_tx(struct uart_port *port, unsigned int tty_start)
{
if (!tx_enabled(port)) {
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
enable_irq(TX_IRQ(port));
tx_enabled(port) = 1;
}
}
static void s3c24xx_serial_start_tx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (!tx_enabled(port)) {
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
enable_irq(ourport->tx_irq);
tx_enabled(port) = 1;
}
}
static void s3c_serial_stop_tx(struct uart_port *port)
{
if (tx_enabled(port)) {
#ifdef UART_HAS_INTMSK
uart_disable_irq(port, UART_TX_INT);
#else
disable_irq(TX_IRQ(port));
#endif
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
s3c_serial_rx_enable(port);
}
}
static void imapx200_serial_stop_tx(struct uart_port *port)
{
struct imapx200_uart_port *ourport = to_ourport(port);
if (tx_enabled(port))
{
uart_disable_irq(port, UART_THRE_INT);
uart_disable_irq(port, UART_TX_INT);
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
imapx200_serial_rx_enable(port);
}
}
static void s3c24xx_serial_stop_tx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (tx_enabled(port)) {
disable_irq_nosync(ourport->tx_irq);
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_enable(port);
}
if (port->line == 3) {
//printk("485_stop_rx\n");
gpio_set_value(S3C64XX_GPK(5), 1);
}
}
static void ks8695uart_stop_tx(struct uart_port *port)
{
if (tx_enabled(port)) {
disable_irq(KS8695_IRQ_UART_TX);
tx_enable(port, 0);
}
}
static int clps711xuart_startup(struct uart_port *port)
{
unsigned int syscon;
int retval;
tx_enabled(port) = 1;
/*
* Allocate the IRQs
*/
retval = request_irq(TX_IRQ(port), clps711xuart_int_tx, 0,
"clps711xuart_tx", port);
if (retval)
return retval;
retval = request_irq(RX_IRQ(port), clps711xuart_int_rx, 0,
"clps711xuart_rx", port);
if (retval) {
free_irq(TX_IRQ(port), port);
return retval;
}
/*
* enable the port
*/
syscon = clps_readl(SYSCON(port));
syscon |= SYSCON_UARTEN;
clps_writel(syscon, SYSCON(port));
return 0;
}
static void ks8695uart_start_tx(struct uart_port *port)
{
if (!tx_enabled(port)) {
enable_irq(KS8695_IRQ_UART_TX);
tx_enable(port, 1);
}
}
static void s3c24xx_serial_start_tx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
struct circ_buf *xmit = &port->state->xmit;
if (!tx_enabled(port)) {
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
tx_enabled(port) = 1;
if (!ourport->dma || !ourport->dma->tx_chan)
s3c24xx_serial_start_tx_pio(ourport);
}
if (ourport->dma && ourport->dma->tx_chan) {
if (!uart_circ_empty(xmit) && !ourport->tx_in_progress)
s3c24xx_serial_start_next_tx(ourport);
}
}
static int s3c24xx_serial_startup(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
int ret;
dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n",
port->mapbase, port->membase);
if (port->line == 2) {
s3c2410_gpio_cfgpin(S3C2410_GPH6, S3C2410_GPH6_TXD2);
s3c2410_gpio_pullup(S3C2410_GPH6, 1);
s3c2410_gpio_cfgpin(S3C2410_GPH7, S3C2410_GPH7_RXD2);
s3c2410_gpio_pullup(S3C2410_GPH7, 1);
}
rx_enabled(port) = 1;
ret = request_irq(RX_IRQ(port),
s3c24xx_serial_rx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret != 0) {
printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port));
return ret;
}
ourport->rx_claimed = 1;
dbg("requesting tx irq...\n");
tx_enabled(port) = 1;
ret = request_irq(TX_IRQ(port),
s3c24xx_serial_tx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret) {
printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port));
goto err;
}
ourport->tx_claimed = 1;
dbg("s3c24xx_serial_startup ok\n");
/* the port reset code should have done the correct
* register setup for the port controls */
return ret;
err:
s3c24xx_serial_shutdown(port);
return ret;
}
static void ks8695uart_stop_tx(struct uart_port *port)
{
if (tx_enabled(port)) {
/* use disable_irq_nosync() and not disable_irq() to avoid self
* imposed deadlock by not waiting for irq handler to end,
* since this ks8695uart_stop_tx() is called from interrupt context.
*/
disable_irq_nosync(KS8695_IRQ_UART_TX);
tx_enable(port, 0);
}
}
static void s3c24xx_serial_start_tx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
static int a =1;//temp
if (port->line == 3) {
// printk("485_start_tx\n");
if(a){
s3c_gpio_cfgpin(S3C64XX_GPK(5), S3C_GPIO_SFN(1));
a=0;
}
gpio_set_value(S3C64XX_GPK(5), 1);
}
if (!tx_enabled(port)) {
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
enable_irq(ourport->tx_irq);
tx_enabled(port) = 1;
}
}
static int s3c_serial_startup(struct uart_port *port)
{
struct s3c_uart_port *ourport = to_ourport(port);
unsigned long flags;
int ret;
dbg("s3c_serial_startup: port=%p (%08lx,%p)\n",
port->mapbase, port->membase);
local_irq_save(flags);
rx_enabled(port) = 1;
tx_enabled(port) = 1;
#ifdef UART_HAS_INTMSK
uart_enable_irq(port, UART_TX_INT | UART_RX_INT);
ret = request_irq(UART_IRQ(port), s3c_serial_interrupt, 0,
s3c_serial_portname(port), ourport);
if (ret != 0) {
printk(KERN_ERR "cannot get irq %d\n", UART_IRQ(port));
return ret;
}
#else
ret = request_irq(RX_IRQ(port),
s3c_serial_rx_chars, 0,
s3c_serial_portname(port), ourport);
if (ret != 0) {
printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port));
return ret;
}
ret = request_irq(TX_IRQ(port),
s3c_serial_tx_chars, 0,
s3c_serial_portname(port), ourport);
if (ret) {
printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port));
s3c_serial_shutdown(port);
local_irq_restore(flags);
return ret;
}
#endif
ourport->rx_claimed = 1;
ourport->tx_claimed = 1;
dbg("s3c_serial_startup ok\n");
/* the port reset code should have done the correct
* register setup for the port controls */
local_irq_restore(flags);
return ret;
}
static int s3c24xx_serial_startup(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
unsigned long flags;
int ret;
dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n",
port->mapbase, port->membase);
local_irq_save(flags);
rx_enabled(port) = 1;
ret = request_irq(RX_IRQ(port),
s3c24xx_serial_rx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret != 0) {
printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port));
return ret;
}
ourport->rx_claimed = 1;
dbg("requesting tx irq...\n");
tx_enabled(port) = 1;
ret = request_irq(TX_IRQ(port),
s3c24xx_serial_tx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret) {
printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port));
goto err;
}
ourport->tx_claimed = 1;
dbg("s3c24xx_serial_startup ok\n");
/* the port reset code should have done the correct
* register setup for the port controls */
local_irq_restore(flags);
return ret;
err:
s3c24xx_serial_shutdown(port);
local_irq_restore(flags);
return ret;
}
static void imapx200_serial_shutdown(struct uart_port *port)
{
struct imapx200_uart_port *ourport = to_ourport(port);
if (ourport->tx_claimed || ourport->rx_claimed)
{
free_irq(UART_IRQ(port), ourport);
ourport->tx_claimed = 0;
ourport->rx_claimed = 0;
tx_enabled(port) = 0;
rx_enabled(port) = 0;
}
}
static int s3c24xx_serial_startup(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
int ret;
dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n",
port->mapbase, port->membase);
/* runstate should be 1 before request_irq is called */
if (cfg->set_runstate)
cfg->set_runstate(1);
rx_enabled(port) = 1;
ret = request_irq(ourport->rx_irq, s3c24xx_serial_rx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret != 0) {
printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq);
goto err;
}
ourport->rx_claimed = 1;
dbg("requesting tx irq...\n");
tx_enabled(port) = 1;
ret = request_irq(ourport->tx_irq, s3c24xx_serial_tx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret) {
printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq);
goto err;
}
ourport->tx_claimed = 1;
dbg("s3c24xx_serial_startup ok\n");
/* the port reset code should have done the correct
* register setup for the port controls */
return ret;
err:
s3c24xx_serial_shutdown(port);
return ret;
}
static void s3c24xx_serial_stop_tx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
struct s3c24xx_uart_dma *dma = ourport->dma;
struct circ_buf *xmit = &port->state->xmit;
struct dma_tx_state state;
int count;
if (!tx_enabled(port))
return;
if (s3c24xx_serial_has_interrupt_mask(port))
s3c24xx_set_bit(port, S3C64XX_UINTM_TXD, S3C64XX_UINTM);
else
disable_irq_nosync(ourport->tx_irq);
if (dma && dma->tx_chan && ourport->tx_in_progress == S3C24XX_TX_DMA) {
dmaengine_pause(dma->tx_chan);
dmaengine_tx_status(dma->tx_chan, dma->tx_cookie, &state);
dmaengine_terminate_all(dma->tx_chan);
dma_sync_single_for_cpu(ourport->port.dev,
dma->tx_transfer_addr, dma->tx_size, DMA_TO_DEVICE);
async_tx_ack(dma->tx_desc);
count = dma->tx_bytes_requested - state.residue;
xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
port->icount.tx += count;
}
tx_enabled(port) = 0;
ourport->tx_in_progress = 0;
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_enable(port);
ourport->tx_mode = 0;
}
static void s3c24xx_serial_shutdown(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (ourport->tx_claimed) {
free_irq(ourport->tx_irq, ourport);
tx_enabled(port) = 0;
ourport->tx_claimed = 0;
}
if (ourport->rx_claimed) {
free_irq(ourport->rx_irq, ourport);
ourport->rx_claimed = 0;
rx_enabled(port) = 0;
}
}
static int s3c24xx_serial_startup(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
int ret;
dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n",
port->mapbase, port->membase);
rx_enabled(port) = 1;
ret = request_irq(ourport->rx_irq, s3c24xx_serial_rx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret != 0) {
printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq);
return ret;
}
ourport->rx_claimed = 1;
dbg("requesting tx irq...\n");
tx_enabled(port) = 1;
ret = request_irq(ourport->tx_irq, s3c24xx_serial_tx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret) {
printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq);
goto err;
}
ourport->tx_claimed = 1;
dbg("s3c24xx_serial_startup ok\n");
return ret;
err:
s3c24xx_serial_shutdown(port);
return ret;
}
static void s3c24xx_serial_shutdown(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
if (ourport->tx_claimed) {
disable_irq(ourport->tx_irq);
free_irq(ourport->tx_irq, ourport);
tx_enabled(port) = 0;
ourport->tx_claimed = 0;
}
if (ourport->rx_claimed) {
disable_irq(ourport->rx_irq);
free_irq(ourport->rx_irq, ourport);
ourport->rx_claimed = 0;
rx_enabled(port) = 0;
}
if (cfg->set_runstate)
cfg->set_runstate(0);
}
static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
struct circ_buf *xmit = &port->state->xmit;
int count;
if (port->x_char) {
clps_writel(port->x_char, UARTDR(port));
port->icount.tx++;
port->x_char = 0;
return IRQ_HANDLED;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port))
goto disable_tx_irq;
count = port->fifosize >> 1;
do {
clps_writel(xmit->buf[xmit->tail], UARTDR(port));
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (uart_circ_empty(xmit))
break;
} while (--count > 0);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (uart_circ_empty(xmit)) {
disable_tx_irq:
disable_irq_nosync(TX_IRQ(port));
tx_enabled(port) = 0;
}
return IRQ_HANDLED;
}
