static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = to_uart_omap_port(port);
unsigned long flags = 0;
dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->port.line);
pm_runtime_get_sync(up->dev);
/*
* Disable interrupts from this port
*/
up->ier = 0;
serial_out(up, UART_IER, 0);
spin_lock_irqsave(&up->port.lock, flags);
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
/*
* Disable break condition and FIFOs
*/
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
/*
* Read data port to reset things, and then free the irq
*/
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
pm_runtime_mark_last_busy(up->dev);
pm_runtime_put_autosuspend(up->dev);
free_irq(up->port.irq, up);
}
static int uart_close_nrt(struct rtdm_dev_context *context,rtdm_user_info_t * user_info)
{
int err;
MY_DEV *up=(MY_DEV *)context->device->device_data;
dev_dbg(up->dev, "serial_omap_shutdown+%d\n", up->line);
up->ier = 0;
serial_out(up, UART_IER, 0);
//disable break condition and FIFOs
serial_out(up,UART_LCR,serial_in(up,UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
//read data port to reset things and then free irq
if(serial_in(up,UART_LSR) & UART_LSR_DR)
(void)serial_in(up,UART_RX);
err=rtdm_irq_disable(&up->irq_handle);//enable irq
if(err<0)
{
rtdm_printk("error in rtdm_irq_disable\n");
return err;
}
rtdm_printk("rtdm_irq_disable\n");
rtdm_irq_free(&up->irq_handle);
free_irq(up->irq, up);
return 0;
}
static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
u8 lcr, efr;
dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->pdev->id);
/*
* Disable interrupts from this port
*/
up->ier = 0;
serial_out(up, UART_IER, 0);
/* If we're using auto-rts then disable it. */
spin_lock_irqsave(&up->port.lock, flags);
lcr = serial_in(up, UART_LCR);
serial_out(up, UART_LCR, 0xbf);
efr = serial_in(up, UART_EFR);
serial_out(up, UART_LCR, lcr);
if (efr & UART_EFR_RTS) {
serial_omap_set_autorts(up, 0);
up->restore_autorts = 1;
}
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, (up->port.mctrl & ~TIOCM_RTS));
spin_unlock_irqrestore(&up->port.lock, flags);
/*
* Disable break condition and FIFOs
*/
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
/*
* Read data port to reset things, and then free the irq
*/
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
if (up->use_dma) {
int tmp;
dma_free_coherent(up->port.dev,
UART_XMIT_SIZE, up->port.state->xmit.buf,
up->uart_dma.tx_buf_dma_phys);
up->port.state->xmit.buf = NULL;
serial_omap_stop_rx(port);
dma_free_coherent(up->port.dev,
up->uart_dma.rx_buf_size, up->uart_dma.rx_buf,
up->uart_dma.rx_buf_dma_phys);
up->uart_dma.rx_buf = NULL;
tmp = serial_in(up, UART_OMAP_SYSC) & OMAP_UART_SYSC_RESET;
serial_out(up, UART_OMAP_SYSC, tmp); /* force-idle */
}
free_irq(up->port.irq, up);
}
static int serial_omap_startup(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
int retval;
retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags,
up->name, up);
if (retval)
return retval;
dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line);
pm_runtime_get_sync(&up->pdev->dev);
serial_omap_clear_fifos(up);
serial_out(up, UART_MCR, UART_MCR_RTS);
(void) serial_in(up, UART_LSR);
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
(void) serial_in(up, UART_MSR);
serial_out(up, UART_LCR, UART_LCR_WLEN8);
spin_lock_irqsave(&up->port.lock, flags);
up->port.mctrl |= TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
up->msr_saved_flags = 0;
if (up->use_dma) {
free_page((unsigned long)up->port.state->xmit.buf);
up->port.state->xmit.buf = dma_alloc_coherent(NULL,
UART_XMIT_SIZE,
(dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys),
0);
init_timer(&(up->uart_dma.rx_timer));
up->uart_dma.rx_timer.function = serial_omap_rxdma_poll;
up->uart_dma.rx_timer.data = up->port.line;
up->uart_dma.rx_buf = dma_alloc_coherent(NULL,
up->uart_dma.rx_buf_size,
(dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0);
}
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up, UART_IER, up->ier);
serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP);
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
up->port_activity = jiffies;
return 0;
}
static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->pdev->id);
/*
* Disable interrupts from this port
*/
up->ier = 0;
serial_out(up, UART_IER, 0);
spin_lock_irqsave(&up->port.lock, flags);
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
/*
* Disable break condition and FIFOs
*/
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
/*
* Read data port to reset things, and then free the irq
*/
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
if (up->use_dma) {
int tmp;
dma_free_coherent(up->port.dev,
UART_XMIT_SIZE, up->port.state->xmit.buf,
up->uart_dma.tx_buf_dma_phys);
up->port.state->xmit.buf = NULL;
serial_omap_stop_rx(port);
dma_free_coherent(up->port.dev,
up->uart_dma.rx_buf_size, up->uart_dma.rx_buf,
up->uart_dma.rx_buf_dma_phys);
up->uart_dma.rx_buf = NULL;
tmp = serial_in(up, UART_OMAP_SYSC) & OMAP_UART_SYSC_RESET;
serial_out(up, UART_OMAP_SYSC, tmp); /* force-idle */
}
free_irq(up->port.irq, up);
#if defined(CONFIG_KEYBOARD_P1)
if((up->port.line == 2)&&(g_keyboard))
{
send_keyevent(0);
}
#endif
/* Set this to zero, would be initialsed
* to the corrcet value at set_stermios.
*/
up->baud_rate = 0;
}
static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags;
DPRINTK("serial_omap_shutdown+%d\n", up->pdev->id);
/*
* Disable interrupts from this port
*/
up->ier = 0;
serial_out(up, UART_IER, 0);
spin_lock_irqsave(&up->port.lock, flags);
if (up->port.flags & UPF_FOURPORT) {
/* reset interrupts on the AST Fourport board */
inb((up->port.iobase & 0xfe0) | 0x1f);
up->port.mctrl |= TIOCM_OUT1;
} else
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
/*
* Disable break condition and FIFOs
*/
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
/*
* Read data port to reset things, and then free the irq
*/
(void) serial_in(up, UART_RX);
if (up->use_dma) {
int tmp;
if (up->is_buf_dma_alloced) {
dma_free_coherent(up->port.dev,
UART_XMIT_SIZE,
up->port.info->xmit.buf,
up->uart_dma.tx_buf_dma_phys);
up->port.info->xmit.buf = NULL;
up->is_buf_dma_alloced = 0;
}
/*TBD: Check if this is really needed here*/
serial_omap_stop_rx(port);
dma_free_coherent(up->port.dev,
up->uart_dma.rx_buf_size,
up->uart_dma.rx_buf,
up->uart_dma.rx_buf_dma_phys);
up->uart_dma.rx_buf = NULL;
tmp = serial_in(up, UART_OMAP_SYSC) & 0x7;
serial_out(up, UART_OMAP_SYSC, tmp); /* force-idle */
}
free_irq(up->port.irq, up);
}
static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->pdev->id);
serial_omap_port_enable(up);
/*
* Disable interrupts & wakeup events from this port
*/
up->ier = 0;
up->wer_restore = 0;
serial_out(up, UART_OMAP_WER, 0);
serial_out(up, UART_IER, 0);
spin_lock_irqsave(&up->port.lock, flags);
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
/*
* Disable break condition and FIFOs
*/
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
/*
* Read data port to reset things, and then free the irq
*/
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
if (up->use_dma) {
dma_free_coherent(up->port.dev,
UART_XMIT_SIZE, up->port.state->xmit.buf,
up->uart_dma.tx_buf_dma_phys);
up->port.state->xmit.buf = NULL;
serial_omap_stop_rx(port);
dma_free_coherent(up->port.dev,
up->uart_dma.rx_buf_size, up->uart_dma.rx_buf,
up->uart_dma.rx_buf_dma_phys);
up->uart_dma.rx_buf = NULL;
}
serial_omap_port_disable(up);
free_irq(up->port.irq, up);
}
int omap_uart_active(int num, u32 timeout)
{
struct uart_omap_port *up = ui[num];
struct circ_buf *xmit;
unsigned int status, iir;
/* Check for recent driver activity. If time delta from now
* to last activty < "uart idle timeout" second keep clocks on.
*/
if (((jiffies - up->port_activity) < timeout))
return 1;
xmit = &up->port.state->xmit;
if (!(uart_circ_empty(xmit) || uart_tx_stopped(&up->port)))
return 1;
status = serial_in(up, UART_LSR);
/* TX hardware not empty */
if (!(status & (UART_LSR_TEMT | UART_LSR_THRE)))
return 1;
/* The data ready in receive line, however, no interrupt
* is pending. The uart controller could not recover from
* this state. Clear the uart fifos to work around this bug.
*/
iir = serial_in(up, UART_IIR);
/* Any rx activity? */
if (status & UART_LSR_DR) {
if ((up->console_port) && (!(iir & UART_IIR_RLSI) &&
(iir & UART_IIR_NO_INT)))
serial_omap_clear_fifos(up);
else
return 1;
}
/* Check if DMA channels are active */
if (up->use_dma && (up->uart_dma.rx_dma_channel != OMAP_UART_DMA_CH_FREE ||
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE))
return 1;
return 0;
}
static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->port.line);
pm_runtime_get_sync(&up->pdev->dev);
up->ier = 0;
serial_out(up, UART_IER, 0);
spin_lock_irqsave(&up->port.lock, flags);
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
if (up->use_dma) {
dma_free_coherent(up->port.dev,
UART_XMIT_SIZE, up->port.state->xmit.buf,
up->uart_dma.tx_buf_dma_phys);
up->port.state->xmit.buf = NULL;
serial_omap_stop_rx(port);
dma_free_coherent(up->port.dev,
up->uart_dma.rx_buf_size, up->uart_dma.rx_buf,
up->uart_dma.rx_buf_dma_phys);
up->uart_dma.rx_buf = NULL;
}
pm_runtime_put(&up->pdev->dev);
free_irq(up->port.irq, up);
}
static int serial_omap_startup(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
int retval;
/*
* Allocate the IRQ
*/
retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags,
up->name, up);
if (retval)
return retval;
dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->pdev->id);
/*
* Clear the FIFO buffers and disable them.
* (they will be reenabled in set_termios())
*/
serial_omap_clear_fifos(up);
/* For Hardware flow control */
serial_out(up, UART_MCR, UART_MCR_RTS);
/*
* Clear the interrupt registers.
*/
(void) serial_in(up, UART_LSR);
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
(void) serial_in(up, UART_MSR);
/*
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
spin_lock_irqsave(&up->port.lock, flags);
/*
* Most PC uarts need OUT2 raised to enable interrupts.
*/
up->port.mctrl |= TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
up->msr_saved_flags = 0;
if (up->use_dma) {
free_page((unsigned long)up->port.state->xmit.buf);
up->port.state->xmit.buf = dma_alloc_coherent(NULL,
UART_XMIT_SIZE,
(dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys),
0);
init_timer(&(up->uart_dma.rx_timer));
up->uart_dma.rx_timer.function = serial_omap_rx_timeout;
up->uart_dma.rx_timer.data = up->pdev->id;
/* Currently the buffer size is 4KB. Can increase it */
up->uart_dma.rx_buf = dma_alloc_coherent(NULL,
up->uart_dma.rx_buf_size,
(dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0);
}
/*
* Finally, enable interrupts. Note: Modem status interrupts
* are set via set_termios(), which will be occurring imminently
* anyway, so we don't enable them here.
*/
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up, UART_IER, up->ier);
/* Enable module level wake up */
serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP);
up->port_activity = jiffies;
return 0;
}
static int serial_omap_startup(struct uart_port *port)
{
struct uart_omap_port *up = to_uart_omap_port(port);
unsigned long flags = 0;
int retval;
/*
* Allocate the IRQ
*/
retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags,
up->name, up);
if (retval)
return retval;
/* Optional wake-up IRQ */
if (up->wakeirq) {
retval = dev_pm_set_dedicated_wake_irq(up->dev, up->wakeirq);
if (retval) {
free_irq(up->port.irq, up);
return retval;
}
}
dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line);
pm_runtime_get_sync(up->dev);
/*
* Clear the FIFO buffers and disable them.
* (they will be reenabled in set_termios())
*/
serial_omap_clear_fifos(up);
/*
* Clear the interrupt registers.
*/
(void) serial_in(up, UART_LSR);
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
(void) serial_in(up, UART_MSR);
/*
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
spin_lock_irqsave(&up->port.lock, flags);
/*
* Most PC uarts need OUT2 raised to enable interrupts.
*/
up->port.mctrl |= TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
up->msr_saved_flags = 0;
/*
* Finally, enable interrupts. Note: Modem status interrupts
* are set via set_termios(), which will be occurring imminently
* anyway, so we don't enable them here.
*/
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up, UART_IER, up->ier);
/* Enable module level wake up */
up->wer = OMAP_UART_WER_MOD_WKUP;
if (up->features & OMAP_UART_WER_HAS_TX_WAKEUP)
up->wer |= OMAP_UART_TX_WAKEUP_EN;
serial_out(up, UART_OMAP_WER, up->wer);
pm_runtime_mark_last_busy(up->dev);
pm_runtime_put_autosuspend(up->dev);
up->port_activity = jiffies;
return 0;
}
static int uart_open_nrt(struct rtdm_dev_context *context,rtdm_user_info_t *user_info_t,int oflags_t)
{
MY_DEV *up=(MY_DEV *)context->device->device_data;
// rtdm_lockctx_t context1;
int retval;
printk("Local struct up=%x\n",up);
f_cir_buf(up);
rtdm_lock_init(&up->lock);
rtdm_event_init(&up->w_event_tx,0);
rtdm_event_init(&up->w_event_rx,0);
printk("name of irq=%s\n",up->name);
retval = request_irq(up->irq, serial_omap_irq,0, up->name, up);
// if (retval)
// return retval;
retval=rtdm_irq_request(&up->irq_handle,up->irq,rtdm_my_isr,0,up->name,up);
if(retval<0)
{
rtdm_printk("error in requesting irq\n");
dev_err(up->dev, "failure requesting irq %i\n", up->irq);
return retval;
}
dev_dbg(up->dev, "serial_omap_startup+%d\n", up->line);
serial_omap_clear_fifos(up);
serial_out(up,UART_MCR,UART_MCR_RTS);
(void)serial_in(up,UART_LSR);
if(serial_in(up,UART_LSR) & UART_LSR_DR)
(void)serial_in(up,UART_RX);
(void)serial_in(up,UART_IIR);
(void)serial_in(up,UART_MSR);
/*
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
printk("UART has word length of 8 bit\n");
up->msr_saved_flags=0;
//enabling interrupts
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up,UART_IER,up->ier);
printk("enabling RLSI and RDI interrupt\n");
//enable module level wake up
serial_out(up,UART_OMAP_WER,OMAP_UART_WER_MOD_WKUP);
printk("OMAP_UART_WER_MOD_WKUP\n");
// up->port_activity=jiffies;
return 0;
}
static int serial_omap_startup(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags;
int irq_flags = 0;
int retval;
/* Zoom2 has GPIO_102 connected to Serial device:
* Active High
*/
if (up->port.flags & UPF_TRIGGER_HIGH)
irq_flags |= IRQF_TRIGGER_HIGH;
/*
* Allocate the IRQ
*/
retval = request_irq(up->port.irq, serial_omap_irq, irq_flags, up->name, up);
if (retval) {
return retval;
}
/*
* Stop the baud clock and disable the UART. UART will be enabled
* back in set_termios. This is essential for DMA mode operations.
*/
serial_out(up, UART_LCR, UART_LCR_DLAB);
serial_out(up, UART_DLL, 0);
serial_out(up, UART_DLM, 0);
serial_out(up, UART_LCR, 0);
serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_DISABLE);
/*
* Clear the FIFO buffers and disable them.
* (they will be reenabled in set_termios())
*/
serial_omap_clear_fifos(up);
serial_out(up, UART_SCR, 0x00);
/* For Hardware flow control */
serial_out(up, UART_MCR, 0x2);
/*
* Clear the interrupt registers.
*/
(void) serial_in(up, UART_LSR);
(void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
(void) serial_in(up, UART_MSR);
/*
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
spin_lock_irqsave(&up->port.lock, flags);
if (up->port.flags & UPF_FOURPORT) {
if (!is_real_interrupt(up->port.irq))
up->port.mctrl |= TIOCM_OUT1;
} else {
/*
* Most PC uarts need OUT2 raised to enable interrupts.
*/
if (is_real_interrupt(up->port.irq))
up->port.mctrl |= TIOCM_OUT2;
}
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
up->msr_saved_flags = 0;
if (up->port.flags & UPF_FOURPORT) {
unsigned int icp;
/*
* Enable interrupts on the AST Fourport board
*/
icp = (up->port.iobase & 0xfe0) | 0x01f;
outb_p(0x80, icp);
(void) inb_p(icp);
}
if (up->use_dma) {
if (!up->is_buf_dma_alloced) {
free_page((unsigned long)up->port.info->xmit.buf);
up->port.info->xmit.buf = NULL;
up->port.info->xmit.buf = dma_alloc_coherent(NULL,
UART_XMIT_SIZE,
(dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys), 0);
up->is_buf_dma_alloced = 1;
}
init_timer(&(up->uart_dma.rx_timer));
up->uart_dma.rx_timer.function = serial_omap_rx_timeout;
up->uart_dma.rx_timer.data = up->pdev->id;
/* Currently the buffer size is 4KB. Can increase it later*/
up->uart_dma.rx_buf = dma_alloc_coherent(NULL,
up->uart_dma.rx_buf_size,
(dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0);
serial_omap_start_rxdma(up);
} else {
/*
* Finally, enable interrupts. Note: Modem status interrupts
* are set via set_termios(), which will be occurring imminently
* anyway, so we don't enable them here.
*/
up->ier = UART_IER_RLSI | UART_IER_RDI; //| UART_IER_RTOIE |UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
return 0;
}
static int serial_omap_startup(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags = 0;
int retval;
/* Enable the Wake-up on CTS for a UART. The UART for
* which is defined in board file, would get enabled.
*/
omap_uart_cts_wakeup(up->pdev->id, 1);
/*
* Allocate the IRQ
*/
retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags,
up->name, up);
if (retval)
return retval;
dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->pdev->id);
/*
* Clear the FIFO buffers and disable them.
* (they will be reenabled in set_termios())
*/
serial_omap_clear_fifos(up);
/* For Hardware flow control */
serial_out(up, UART_MCR, UART_MCR_RTS);
/*
* Clear the interrupt registers.
*/
(void) serial_in(up, UART_LSR);
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
/*
* We _do_ need to save this value as we pass here after suspend
*/
up->msr_saved_flags = serial_in(up, UART_MSR);
/*
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
spin_lock_irqsave(&up->port.lock, flags);
/*
* Most PC uarts need OUT2 raised to enable interrupts.
*/
up->port.mctrl |= TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
spin_unlock_irqrestore(&up->port.lock, flags);
if (up->use_dma) {
free_page((unsigned long)up->port.state->xmit.buf);
up->port.state->xmit.buf = dma_alloc_coherent(NULL,
UART_XMIT_SIZE,
(dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys),
0);
init_timer(&(up->uart_dma.rx_timer));
up->uart_dma.rx_timer.function = serial_omap_rxdma_poll;
up->uart_dma.rx_timer.data = up->pdev->id;
/* Currently the buffer size is 4KB. Can increase it */
up->uart_dma.rx_buf = dma_alloc_coherent(NULL,
up->uart_dma.rx_buf_size,
(dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0);
}
/*
* Finally, enable interrupts. Note: Modem status interrupts
* are set via set_termios(), which will be occurring imminently
* anyway, so we don't enable them here.
*/
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up, UART_IER, up->ier);
up->port_activity = jiffies;
#ifdef GPS_UART_WORKAROUND
if (up->pdev->id == UART1) {
mutex_lock(&gps_uart_wa);
gps_uart_wa_open_flag = GPS_UART_OPEN;
mutex_unlock(&gps_uart_wa);
}
#endif
return 0;
}
static void serial_omap_shutdown(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
unsigned long flags;
u8 lcr, efr;
DPRINTK("serial_omap_shutdown+%d\n", up->pdev->id);
/*
* If we're using auto-rts then disable it.
*/
lcr = serial_in(up, UART_LCR);
serial_out(up, UART_LCR, 0xbf);
efr = serial_in(up, UART_EFR);
serial_out(up, UART_LCR, lcr);
if (efr & UART_EFR_RTS) {
serial_omap_set_autorts(up, 0);
up->restore_autorts = 1;
}
/*
* Disable interrupts from this port
*/
up->ier = 0;
serial_out(up, UART_IER, 0);
spin_lock_irqsave(&up->port.lock, flags);
if (up->port.flags & UPF_FOURPORT) {
/* reset interrupts on the AST Fourport board */
inb((up->port.iobase & 0xfe0) | 0x1f);
up->port.mctrl |= TIOCM_OUT1;
} else
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, (up->port.mctrl & ~TIOCM_RTS));
spin_unlock_irqrestore(&up->port.lock, flags);
if (up->pdev->id == gps_port) {
serial_out(up, UART_LCR, UART_LCR_DLAB);
serial_out(up, UART_DLL, 0);
serial_out(up, UART_DLM, 0);
serial_out(up, UART_LCR, 0);
serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_DISABLE);
}
/*
* Disable break condition and FIFOs
*/
serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
serial_omap_clear_fifos(up);
/*
* Read data port to reset things, and then free the irq
*/
if (serial_in(up, UART_LSR) & UART_LSR_DR)
(void) serial_in(up, UART_RX);
if (up->use_dma) {
int tmp;
if (up->is_buf_dma_alloced) {
dma_free_coherent(up->port.dev,
UART_XMIT_SIZE,
up->port.state->xmit.buf,
up->uart_dma.tx_buf_dma_phys);
up->port.state->xmit.buf = NULL;
up->is_buf_dma_alloced = 0;
}
/*TBD: Check if this is really needed here*/
serial_omap_stop_rx(port);
dma_free_coherent(up->port.dev,
up->uart_dma.rx_buf_size,
up->uart_dma.rx_buf, up->uart_dma.rx_buf_dma_phys);
up->uart_dma.rx_buf = NULL;
tmp = serial_in(up, UART_OMAP_SYSC) & 0x7;
serial_out(up, UART_OMAP_SYSC, tmp); /* force-idle */
}
free_irq(up->port.irq, up);
if (cancel_work_sync(&up->tty_work))
tty_flip_buffer_work(&up->tty_work);
}
static int serial_omap_probe(struct platform_device *pdev)
{
struct plat_serialomap_port *pdata = pdev->dev.platform_data;
struct uart_omap_port *up;
struct resource *mem, *irq;
int ret = -ENOSPC;
char str[7];
if (!pdata) {
dev_err(&pdev->dev, "no platform data?\n");
return -ENODEV;
}
if (pdata->disabled) {
dev_err(&pdev->dev, "device disabled\n");
return -ENODEV;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource?\n");
return -ENODEV;
}
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "no irq resource?\n");
return -ENODEV;
}
ret = (int) request_mem_region(mem->start, (mem->end - mem->start) + 1,
pdev->dev.driver->name);
if (!ret) {
dev_err(&pdev->dev, "memory region already claimed\n");
return -EBUSY;
}
up = kzalloc(sizeof(*up), GFP_KERNEL);
if (up == NULL) {
ret = -ENOMEM;
goto do_release_region;
}
sprintf(up->name, "OMAP UART%d", pdev->id);
up->pdev = pdev;
up->port.dev = &pdev->dev;
up->port.type = PORT_OMAP;
up->port.iotype = UPIO_MEM;
up->port.mapbase = mem->start;
up->port.irq = irq->start;
up->port.fifosize = 64;
up->port.ops = &serial_omap_pops;
up->port.line = pdev->id - 1;
#define QUART_CLK (1843200)
if (pdev->id == 4) {
up->port.membase = ioremap_nocache(mem->start, 0x16 << 1);
up->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
UPF_SHARE_IRQ | UPF_TRIGGER_HIGH;
up->port.uartclk = QUART_CLK;
up->port.regshift = 1;
} else {
up->port.membase = (void *) OMAP2_L4_IO_ADDRESS(mem->start);
up->port.flags = pdata->flags;
up->port.uartclk = 48000000;
up->port.regshift = 2;
#ifdef CONFIG_SERIAL_OMAP3430_HW_FLOW_CONTROL
up->ctsrts = pdata->ctsrts;
#endif
}
if (pdev->id == (UART1+1)) {
#ifdef CONFIG_SERIAL_OMAP_DMA_UART1
up->use_dma = 1;
up->uart_dma.rx_buf_size =
CONFIG_SERIAL_OMAP_UART1_RXDMA_BUFSIZE;
up->uart_dma.rx_timeout =
CONFIG_SERIAL_OMAP_UART1_RXDMA_TIMEOUT;
#endif
} else if (pdev->id == (UART2+1)) {
#ifdef CONFIG_SERIAL_OMAP_DMA_UART2
up->use_dma = 1;
up->uart_dma.rx_buf_size =
CONFIG_SERIAL_OMAP_UART2_RXDMA_BUFSIZE;
up->uart_dma.rx_timeout =
CONFIG_SERIAL_OMAP_UART2_RXDMA_TIMEOUT;
#endif
} else if (pdev->id == (UART3+1)) {
#ifdef CONFIG_SERIAL_OMAP_DMA_UART3
up->use_dma = 1;
up->uart_dma.rx_buf_size =
CONFIG_SERIAL_OMAP_UART3_RXDMA_BUFSIZE;
up->uart_dma.rx_timeout =
CONFIG_SERIAL_OMAP_UART3_RXDMA_TIMEOUT;
#endif
}
if (up->use_dma) {
spin_lock_init(&(up->uart_dma.tx_lock));
spin_lock_init(&(up->uart_dma.rx_lock));
up->uart_dma.tx_dma_channel = 0xFF;
up->uart_dma.rx_dma_channel = 0xFF;
}
if (console_detect(str))
printk("Invalid console paramter. UART Library Init Failed!\n");
up->use_console = 0;
fcr[pdev->id - 1] = 0;
if (!strcmp(str, "ttyS0"))
up->use_console = 1;
else if (!strcmp(str, "ttyS1"))
up->use_console = 1;
else if (!strcmp(str, "ttyS2"))
up->use_console = 1;
else if (!strcmp(str, "ttyS3"))
up->use_console = 1;
else
printk(KERN_INFO
"!!!!!!!! Unable to recongnize Console UART........\n");
ui[pdev->id - 1] = up;
serial_omap_add_console_port(up);
serial_omap_clear_fifos(up);
ret = uart_add_one_port(&serial_omap_reg, &up->port);
if (ret != 0)
goto do_release_region;
platform_set_drvdata(pdev, up);
if (pdata->wake_gpio_strobe) {
if (gpio_request(pdata->wake_gpio_strobe,
"UART AP -> BP wakeup strobe")) {
printk(KERN_ERR "Error requesting GPIO\n");
} else
gpio_direction_output(pdata->wake_gpio_strobe, 0);
}
INIT_WORK(&up->tty_work, tty_flip_buffer_work);
return 0;
do_release_region:
release_mem_region(mem->start, (mem->end - mem->start) + 1);
return ret;
}
