static int clps711xuart_startup(struct uart_port *port, struct uart_info *info)
{
u_int syscon;
int retval;
/*
* Allocate the IRQs
*/
retval = request_irq(TX_IRQ(port), clps711xuart_int_tx, 0,
"clps711xuart_tx", info);
if (retval)
return retval;
retval = request_irq(RX_IRQ(port), clps711xuart_int_rx, 0,
"clps711xuart_rx", info);
if (retval) {
free_irq(TX_IRQ(port), info);
return retval;
}
port->ops->set_mctrl(port, info->mctrl);
/*
* enable the port
*/
syscon = clps_readl(SYSCON(port));
syscon |= SYSCON_UARTEN;
clps_writel(syscon, SYSCON(port));
return 0;
}
static int uart_clps711x_startup(struct uart_port *port)
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
int ret;
s->tx_enabled[port->line] = 1;
/* Allocate the IRQs */
ret = devm_request_irq(port->dev, TX_IRQ(port), uart_clps711x_int_tx,
0, UART_CLPS711X_NAME " TX", port);
if (ret)
return ret;
ret = devm_request_irq(port->dev, RX_IRQ(port), uart_clps711x_int_rx,
0, UART_CLPS711X_NAME " RX", port);
if (ret) {
devm_free_irq(port->dev, TX_IRQ(port), port);
return ret;
}
/* Disable break */
clps_writel(clps_readl(UBRLCR(port)) & ~UBRLCR_BREAK, UBRLCR(port));
/* Enable the port */
clps_writel(clps_readl(SYSCON(port)) | SYSCON_UARTEN, SYSCON(port));
return 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 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 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 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 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_stop_tx(struct uart_port *port)
{
if (tx_enabled(port)) {
disable_irq(TX_IRQ(port));
tx_enabled(port) = 0;
}
}
static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
struct clps711x_port *s = dev_get_drvdata(port->dev);
struct circ_buf *xmit = &port->state->xmit;
if (port->x_char) {
clps_writew(port->x_char, UARTDR(port));
port->icount.tx++;
port->x_char = 0;
return IRQ_HANDLED;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
disable_irq_nosync(TX_IRQ(port));
s->tx_enabled[port->line] = 0;
return IRQ_HANDLED;
}
while (!uart_circ_empty(xmit)) {
clps_writew(xmit->buf[xmit->tail], UARTDR(port));
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (clps_readl(SYSFLG(port) & SYSFLG_UTXFF))
break;
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
return IRQ_HANDLED;
}
static void clps711xuart_start_tx(struct uart_port *port)
{
if (!tx_enabled(port)) {
enable_irq(TX_IRQ(port));
tx_enabled(port) = 1;
}
}
static void uart_clps711x_shutdown(struct uart_port *port)
{
/* Free the interrupts */
devm_free_irq(port->dev, TX_IRQ(port), port);
devm_free_irq(port->dev, RX_IRQ(port), port);
/* Disable the port */
clps_writel(clps_readl(SYSCON(port)) & ~SYSCON_UARTEN, SYSCON(port));
}
static void uart_clps711x_start_tx(struct uart_port *port)
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
if (!s->tx_enabled[port->line]) {
enable_irq(TX_IRQ(port));
s->tx_enabled[port->line] = 1;
}
}
static void omahauart_shutdown(struct uart_port *port, struct uart_info *info)
{
/*
* Free the interrupt
*/
free_irq(TX_IRQ(port), info); /* TX interrupt */
free_irq(RX_IRQ(port), info); /* RX interrupt */
}
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 int s3c2440_startup(struct uart_port *port, struct uart_info *info)
{
int retval, ucon, irq_name_num;
char irq_name[3][3][20] = {{"s3c2440_uart0_rx", "s3c2440_uart0_tx", "s3c2440_uart0_err"},
{"s3c2440_uart1_rx", "s3c2440_uart1_tx", "s3c2440_uart1_err"},
{"s3c2440_uart2_rx", "s3c2440_uart2_tx", "s3c2440_uart2_err"}};
if (RX_IRQ(port) == IRQ_RXD0)
irq_name_num = 0;
else if (RX_IRQ(port) == IRQ_RXD1)
irq_name_num = 1;
else if (RX_IRQ(port) == IRQ_RXD2)
irq_name_num = 2;
else
return (1);
retval = request_irq(RX_IRQ(port), s3c2440_rx_int, SA_INTERRUPT,
irq_name[irq_name_num][0], info);
if (retval){
return retval;
}
retval = request_irq(TX_IRQ(port), s3c2440_tx_int, SA_INTERRUPT,
irq_name[irq_name_num][1], info);
if (retval) {
free_irq (RX_IRQ(port), info);
return retval;
}
retval = request_irq(ERR_IRQ(port), s3c2440_err_int, SA_INTERRUPT,
irq_name[irq_name_num][2], info);
if (retval) {
free_irq (RX_IRQ(port), info);
free_irq (TX_IRQ(port), info);
return retval;
}
ucon = (UCON_TX_INT_LVL | UCON_RX_INT_LVL |
UCON_TX_INT | UCON_RX_INT | UCON_RX_TIMEOUT);
UART_PUT_UCON (port, ucon);
return 0;
}
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 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 int omahauart_startup(struct uart_port *port, struct uart_info *info)
{
unsigned int tmp;
int retval;
/*
* Allocate the IRQs
*/
retval = request_irq(TX_IRQ(port), omahauart_int_tx, 0, "omaha_uart_tx", info);
if (retval)
return retval;
retval = request_irq(RX_IRQ(port), omahauart_int_rx, 0, "omaha_uart_rx", info);
if (retval)
{
free_irq(TX_IRQ(port), info);
return retval;
}
/*
* initialise the old status of the modem signals
*/
info->drv_old_status = 0;
// Clear all errors
writel(0, port->membase + OMAHA_UERSTAT);
// Enable FIFO, 16-byte watermark, also do reset (auto-clearing)
writel(0xF7, port->membase + OMAHA_UFCON);
// Level driven TX/RX ints, with rx timeout enabled
tmp = readl(port->membase + OMAHA_UCON);
tmp |= 0x280; // rx is pulse driven...
writel(tmp, port->membase + OMAHA_UCON);
return 0;
}
static void s3c24xx_serial_shutdown(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
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;
}
}
static void clps711xuart_shutdown(struct uart_port *port)
{
unsigned int ubrlcr, syscon;
/*
* Free the interrupt
*/
free_irq(TX_IRQ(port), port); /* TX interrupt */
free_irq(RX_IRQ(port), port); /* RX interrupt */
/*
* disable the port
*/
syscon = clps_readl(SYSCON(port));
syscon &= ~SYSCON_UARTEN;
clps_writel(syscon, SYSCON(port));
/*
* disable break condition and fifos
*/
ubrlcr = clps_readl(UBRLCR(port));
ubrlcr &= ~(UBRLCR_FIFOEN | UBRLCR_BREAK);
clps_writel(ubrlcr, UBRLCR(port));
}
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;
}
static void omahauart_stop_tx(struct uart_port *port, u_int from_tty)
{
disable_irq(TX_IRQ(port));
}
static void omahauart_start_tx(struct uart_port *port, u_int nonempty, u_int from_tty)
{
if (nonempty)
enable_irq(TX_IRQ(port));
}
static int uart_clps711x_probe(struct platform_device *pdev)
{
struct clps711x_port *s;
int ret, i;
s = devm_kzalloc(&pdev->dev, sizeof(struct clps711x_port), GFP_KERNEL);
if (!s) {
dev_err(&pdev->dev, "Error allocating port structure\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, s);
s->uart_clk = devm_clk_get(&pdev->dev, "uart");
if (IS_ERR(s->uart_clk)) {
dev_err(&pdev->dev, "Can't get UART clocks\n");
ret = PTR_ERR(s->uart_clk);
goto err_out;
}
s->uart.owner = THIS_MODULE;
s->uart.dev_name = "ttyCL";
s->uart.major = UART_CLPS711X_MAJOR;
s->uart.minor = UART_CLPS711X_MINOR;
s->uart.nr = UART_CLPS711X_NR;
#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
s->uart.cons = &s->console;
s->uart.cons->device = uart_console_device;
s->uart.cons->write = uart_clps711x_console_write;
s->uart.cons->setup = uart_clps711x_console_setup;
s->uart.cons->flags = CON_PRINTBUFFER;
s->uart.cons->index = -1;
s->uart.cons->data = s;
strcpy(s->uart.cons->name, "ttyCL");
#endif
ret = uart_register_driver(&s->uart);
if (ret) {
dev_err(&pdev->dev, "Registering UART driver failed\n");
devm_clk_put(&pdev->dev, s->uart_clk);
goto err_out;
}
for (i = 0; i < UART_CLPS711X_NR; i++) {
s->port[i].line = i;
s->port[i].dev = &pdev->dev;
s->port[i].irq = TX_IRQ(&s->port[i]);
s->port[i].iobase = SYSCON(&s->port[i]);
s->port[i].type = PORT_CLPS711X;
s->port[i].fifosize = 16;
s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE;
s->port[i].uartclk = clk_get_rate(s->uart_clk);
s->port[i].ops = &uart_clps711x_ops;
WARN_ON(uart_add_one_port(&s->uart, &s->port[i]));
}
return 0;
err_out:
platform_set_drvdata(pdev, NULL);
return ret;
}
static void s3c2440_stop_tx(struct uart_port *port, u_int from_tty)
{
disable_irq (TX_IRQ(port));
tx_irq_enabled = 0;
}
/*
* interrupts may not be disabled on entry
*/
static void s3c2440_start_tx(struct uart_port *port, u_int nonempty, u_int from_tty)
{
if (!tx_irq_enabled)
enable_irq (TX_IRQ(port));
tx_irq_enabled = 1;
}
static void s3c2440_shutdown(struct uart_port *port, struct uart_info *info)
{
free_irq (RX_IRQ(port), info);
free_irq (TX_IRQ(port), info);
free_irq (ERR_IRQ(port), info);
}