Lines Matching refs:port
25 struct uart_port port; member
35 static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier);
39 static void timbuart_stop_rx(struct uart_port *port) in timbuart_stop_rx() argument
42 u32 ier = ioread32(port->membase + TIMBUART_IER) & ~RXFLAGS; in timbuart_stop_rx()
43 iowrite32(ier, port->membase + TIMBUART_IER); in timbuart_stop_rx()
46 static void timbuart_stop_tx(struct uart_port *port) in timbuart_stop_tx() argument
49 u32 ier = ioread32(port->membase + TIMBUART_IER) & ~TXBAE; in timbuart_stop_tx()
50 iowrite32(ier, port->membase + TIMBUART_IER); in timbuart_stop_tx()
53 static void timbuart_start_tx(struct uart_port *port) in timbuart_start_tx() argument
56 container_of(port, struct timbuart_port, port); in timbuart_start_tx()
62 static unsigned int timbuart_tx_empty(struct uart_port *port) in timbuart_tx_empty() argument
64 u32 isr = ioread32(port->membase + TIMBUART_ISR); in timbuart_tx_empty()
69 static void timbuart_flush_buffer(struct uart_port *port) in timbuart_flush_buffer() argument
71 if (!timbuart_tx_empty(port)) { in timbuart_flush_buffer()
72 u8 ctl = ioread8(port->membase + TIMBUART_CTRL) | in timbuart_flush_buffer()
75 iowrite8(ctl, port->membase + TIMBUART_CTRL); in timbuart_flush_buffer()
76 iowrite32(TXBF, port->membase + TIMBUART_ISR); in timbuart_flush_buffer()
80 static void timbuart_rx_chars(struct uart_port *port) in timbuart_rx_chars() argument
82 struct tty_port *tport = &port->state->port; in timbuart_rx_chars()
84 while (ioread32(port->membase + TIMBUART_ISR) & RXDP) { in timbuart_rx_chars()
85 u8 ch = ioread8(port->membase + TIMBUART_RXFIFO); in timbuart_rx_chars()
86 port->icount.rx++; in timbuart_rx_chars()
92 dev_dbg(port->dev, "%s - total read %d bytes\n", in timbuart_rx_chars()
93 __func__, port->icount.rx); in timbuart_rx_chars()
96 static void timbuart_tx_chars(struct uart_port *port) in timbuart_tx_chars() argument
100 while (!(ioread32(port->membase + TIMBUART_ISR) & TXBF) && in timbuart_tx_chars()
101 uart_fifo_get(port, &ch)) in timbuart_tx_chars()
102 iowrite8(ch, port->membase + TIMBUART_TXFIFO); in timbuart_tx_chars()
104 dev_dbg(port->dev, in timbuart_tx_chars()
107 port->icount.tx, in timbuart_tx_chars()
108 ioread8(port->membase + TIMBUART_CTRL), in timbuart_tx_chars()
109 port->mctrl & TIOCM_RTS, in timbuart_tx_chars()
110 ioread8(port->membase + TIMBUART_BAUDRATE)); in timbuart_tx_chars()
113 static void timbuart_handle_tx_port(struct uart_port *port, u32 isr, u32 *ier) in timbuart_handle_tx_port() argument
116 container_of(port, struct timbuart_port, port); in timbuart_handle_tx_port()
117 struct tty_port *tport = &port->state->port; in timbuart_handle_tx_port()
119 if (kfifo_is_empty(&tport->xmit_fifo) || uart_tx_stopped(port)) in timbuart_handle_tx_port()
122 if (port->x_char) in timbuart_handle_tx_port()
126 timbuart_tx_chars(port); in timbuart_handle_tx_port()
128 iowrite32(TXFLAGS, port->membase + TIMBUART_ISR); in timbuart_handle_tx_port()
131 uart_write_wakeup(port); in timbuart_handle_tx_port()
144 dev_dbg(port->dev, "%s - leaving\n", __func__); in timbuart_handle_tx_port()
147 static void timbuart_handle_rx_port(struct uart_port *port, u32 isr, u32 *ier) in timbuart_handle_rx_port() argument
152 u8 ctl = ioread8(port->membase + TIMBUART_CTRL) | in timbuart_handle_rx_port()
154 iowrite8(ctl, port->membase + TIMBUART_CTRL); in timbuart_handle_rx_port()
155 port->icount.overrun++; in timbuart_handle_rx_port()
157 timbuart_rx_chars(port); in timbuart_handle_rx_port()
160 iowrite32(RXFLAGS, port->membase + TIMBUART_ISR); in timbuart_handle_rx_port()
166 dev_dbg(port->dev, "%s - leaving\n", __func__); in timbuart_handle_rx_port()
174 uart_port_lock(&uart->port); in timbuart_tasklet()
176 isr = ioread32(uart->port.membase + TIMBUART_ISR); in timbuart_tasklet()
177 dev_dbg(uart->port.dev, "%s ISR: %x\n", __func__, isr); in timbuart_tasklet()
180 timbuart_handle_tx_port(&uart->port, isr, &ier); in timbuart_tasklet()
182 timbuart_mctrl_check(&uart->port, isr, &ier); in timbuart_tasklet()
185 timbuart_handle_rx_port(&uart->port, isr, &ier); in timbuart_tasklet()
187 iowrite32(ier, uart->port.membase + TIMBUART_IER); in timbuart_tasklet()
189 uart_port_unlock(&uart->port); in timbuart_tasklet()
190 dev_dbg(uart->port.dev, "%s leaving\n", __func__); in timbuart_tasklet()
193 static unsigned int timbuart_get_mctrl(struct uart_port *port) in timbuart_get_mctrl() argument
195 u8 cts = ioread8(port->membase + TIMBUART_CTRL); in timbuart_get_mctrl()
196 dev_dbg(port->dev, "%s - cts %x\n", __func__, cts); in timbuart_get_mctrl()
204 static void timbuart_set_mctrl(struct uart_port *port, unsigned int mctrl) in timbuart_set_mctrl() argument
206 dev_dbg(port->dev, "%s - %x\n", __func__, mctrl); in timbuart_set_mctrl()
209 iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL); in timbuart_set_mctrl()
211 iowrite8(0, port->membase + TIMBUART_CTRL); in timbuart_set_mctrl()
214 static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier) in timbuart_mctrl_check() argument
220 iowrite32(CTS_DELTA, port->membase + TIMBUART_ISR); in timbuart_mctrl_check()
221 cts = timbuart_get_mctrl(port); in timbuart_mctrl_check()
222 uart_handle_cts_change(port, cts & TIOCM_CTS); in timbuart_mctrl_check()
223 wake_up_interruptible(&port->state->port.delta_msr_wait); in timbuart_mctrl_check()
229 static void timbuart_break_ctl(struct uart_port *port, int ctl) in timbuart_break_ctl() argument
234 static int timbuart_startup(struct uart_port *port) in timbuart_startup() argument
237 container_of(port, struct timbuart_port, port); in timbuart_startup()
239 dev_dbg(port->dev, "%s\n", __func__); in timbuart_startup()
241 iowrite8(TIMBUART_CTRL_FLSHRX, port->membase + TIMBUART_CTRL); in timbuart_startup()
242 iowrite32(0x1ff, port->membase + TIMBUART_ISR); in timbuart_startup()
245 port->membase + TIMBUART_IER); in timbuart_startup()
247 return request_irq(port->irq, timbuart_handleinterrupt, IRQF_SHARED, in timbuart_startup()
251 static void timbuart_shutdown(struct uart_port *port) in timbuart_shutdown() argument
254 container_of(port, struct timbuart_port, port); in timbuart_shutdown()
255 dev_dbg(port->dev, "%s\n", __func__); in timbuart_shutdown()
256 free_irq(port->irq, uart); in timbuart_shutdown()
257 iowrite32(0, port->membase + TIMBUART_IER); in timbuart_shutdown()
259 timbuart_flush_buffer(port); in timbuart_shutdown()
273 static void timbuart_set_termios(struct uart_port *port, in timbuart_set_termios() argument
281 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); in timbuart_set_termios()
283 dev_dbg(port->dev, "%s - bindex %d\n", __func__, bindex); in timbuart_set_termios()
295 uart_port_lock_irqsave(port, &flags); in timbuart_set_termios()
296 iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE); in timbuart_set_termios()
297 uart_update_timeout(port, termios->c_cflag, baud); in timbuart_set_termios()
298 uart_port_unlock_irqrestore(port, flags); in timbuart_set_termios()
301 static const char *timbuart_type(struct uart_port *port) in timbuart_type() argument
303 return port->type == PORT_UNKNOWN ? "timbuart" : NULL; in timbuart_type()
309 static void timbuart_release_port(struct uart_port *port) in timbuart_release_port() argument
311 struct platform_device *pdev = to_platform_device(port->dev); in timbuart_release_port()
315 if (port->flags & UPF_IOREMAP) { in timbuart_release_port()
316 iounmap(port->membase); in timbuart_release_port()
317 port->membase = NULL; in timbuart_release_port()
320 release_mem_region(port->mapbase, size); in timbuart_release_port()
323 static int timbuart_request_port(struct uart_port *port) in timbuart_request_port() argument
325 struct platform_device *pdev = to_platform_device(port->dev); in timbuart_request_port()
329 if (!request_mem_region(port->mapbase, size, "timb-uart")) in timbuart_request_port()
332 if (port->flags & UPF_IOREMAP) { in timbuart_request_port()
333 port->membase = ioremap(port->mapbase, size); in timbuart_request_port()
334 if (port->membase == NULL) { in timbuart_request_port()
335 release_mem_region(port->mapbase, size); in timbuart_request_port()
347 if (ioread8(uart->port.membase + TIMBUART_IPR)) { in timbuart_handleinterrupt()
348 uart->last_ier = ioread32(uart->port.membase + TIMBUART_IER); in timbuart_handleinterrupt()
351 iowrite32(0, uart->port.membase + TIMBUART_IER); in timbuart_handleinterrupt()
364 static void timbuart_config_port(struct uart_port *port, int flags) in timbuart_config_port() argument
367 port->type = PORT_TIMBUART; in timbuart_config_port()
368 timbuart_request_port(port); in timbuart_config_port()
372 static int timbuart_verify_port(struct uart_port *port, in timbuart_verify_port() argument
423 uart->port.uartclk = 3250000 * 16; in timbuart_probe()
424 uart->port.fifosize = TIMBUART_FIFO_SIZE; in timbuart_probe()
425 uart->port.regshift = 2; in timbuart_probe()
426 uart->port.iotype = UPIO_MEM; in timbuart_probe()
427 uart->port.ops = &timbuart_ops; in timbuart_probe()
428 uart->port.irq = 0; in timbuart_probe()
429 uart->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; in timbuart_probe()
430 uart->port.line = 0; in timbuart_probe()
431 uart->port.dev = &dev->dev; in timbuart_probe()
438 uart->port.mapbase = iomem->start; in timbuart_probe()
439 uart->port.membase = NULL; in timbuart_probe()
446 uart->port.irq = irq; in timbuart_probe()
454 err = uart_add_one_port(&timbuart_driver, &uart->port); in timbuart_probe()
478 uart_remove_one_port(&timbuart_driver, &uart->port); in timbuart_remove()