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
98 	struct circ_buf *xmit = &port->state->xmit;  in timbuart_tx_chars()
100 	while (!(ioread32(port->membase + TIMBUART_ISR) & TXBF) &&  in timbuart_tx_chars()
103 			port->membase + TIMBUART_TXFIFO);  in timbuart_tx_chars()
105 		port->icount.tx++;  in timbuart_tx_chars()
108 	dev_dbg(port->dev,  in timbuart_tx_chars()
111 		port->icount.tx,  in timbuart_tx_chars()
112 		ioread8(port->membase + TIMBUART_CTRL),  in timbuart_tx_chars()
113 		port->mctrl & TIOCM_RTS,  in timbuart_tx_chars()
114 		ioread8(port->membase + TIMBUART_BAUDRATE));  in timbuart_tx_chars()
117 static void timbuart_handle_tx_port(struct uart_port *port, u32 isr, u32 *ier)  in timbuart_handle_tx_port()  argument
120 		container_of(port, struct timbuart_port, port);  in timbuart_handle_tx_port()
121 	struct circ_buf *xmit = &port->state->xmit;  in timbuart_handle_tx_port()
123 	if (uart_circ_empty(xmit) || uart_tx_stopped(port))  in timbuart_handle_tx_port()
126 	if (port->x_char)  in timbuart_handle_tx_port()
130 		timbuart_tx_chars(port);  in timbuart_handle_tx_port()
132 		iowrite32(TXFLAGS, port->membase + TIMBUART_ISR);  in timbuart_handle_tx_port()
135 			uart_write_wakeup(port);  in timbuart_handle_tx_port()
148 	dev_dbg(port->dev, "%s - leaving\n", __func__);  in timbuart_handle_tx_port()
151 static void timbuart_handle_rx_port(struct uart_port *port, u32 isr, u32 *ier)  in timbuart_handle_rx_port()  argument
156 			u8 ctl = ioread8(port->membase + TIMBUART_CTRL) |  in timbuart_handle_rx_port()
158 			iowrite8(ctl, port->membase + TIMBUART_CTRL);  in timbuart_handle_rx_port()
159 			port->icount.overrun++;  in timbuart_handle_rx_port()
161 			timbuart_rx_chars(port);  in timbuart_handle_rx_port()
164 		iowrite32(RXFLAGS, port->membase + TIMBUART_ISR);  in timbuart_handle_rx_port()
170 	dev_dbg(port->dev, "%s - leaving\n", __func__);  in timbuart_handle_rx_port()
178 	spin_lock(&uart->port.lock);  in timbuart_tasklet()
180 	isr = ioread32(uart->port.membase + TIMBUART_ISR);  in timbuart_tasklet()
181 	dev_dbg(uart->port.dev, "%s ISR: %x\n", __func__, isr);  in timbuart_tasklet()
184 		timbuart_handle_tx_port(&uart->port, isr, &ier);  in timbuart_tasklet()
186 	timbuart_mctrl_check(&uart->port, isr, &ier);  in timbuart_tasklet()
189 		timbuart_handle_rx_port(&uart->port, isr, &ier);  in timbuart_tasklet()
191 	iowrite32(ier, uart->port.membase + TIMBUART_IER);  in timbuart_tasklet()
193 	spin_unlock(&uart->port.lock);  in timbuart_tasklet()
194 	dev_dbg(uart->port.dev, "%s leaving\n", __func__);  in timbuart_tasklet()
197 static unsigned int timbuart_get_mctrl(struct uart_port *port)  in timbuart_get_mctrl()  argument
199 	u8 cts = ioread8(port->membase + TIMBUART_CTRL);  in timbuart_get_mctrl()
200 	dev_dbg(port->dev, "%s - cts %x\n", __func__, cts);  in timbuart_get_mctrl()
208 static void timbuart_set_mctrl(struct uart_port *port, unsigned int mctrl)  in timbuart_set_mctrl()  argument
210 	dev_dbg(port->dev, "%s - %x\n", __func__, mctrl);  in timbuart_set_mctrl()
213 		iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL);  in timbuart_set_mctrl()
215 		iowrite8(0, port->membase + TIMBUART_CTRL);  in timbuart_set_mctrl()
218 static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier)  in timbuart_mctrl_check()  argument
224 		iowrite32(CTS_DELTA, port->membase + TIMBUART_ISR);  in timbuart_mctrl_check()
225 		cts = timbuart_get_mctrl(port);  in timbuart_mctrl_check()
226 		uart_handle_cts_change(port, cts & TIOCM_CTS);  in timbuart_mctrl_check()
227 		wake_up_interruptible(&port->state->port.delta_msr_wait);  in timbuart_mctrl_check()
233 static void timbuart_break_ctl(struct uart_port *port, int ctl)  in timbuart_break_ctl()  argument
238 static int timbuart_startup(struct uart_port *port)  in timbuart_startup()  argument
241 		container_of(port, struct timbuart_port, port);  in timbuart_startup()
243 	dev_dbg(port->dev, "%s\n", __func__);  in timbuart_startup()
245 	iowrite8(TIMBUART_CTRL_FLSHRX, port->membase + TIMBUART_CTRL);  in timbuart_startup()
246 	iowrite32(0x1ff, port->membase + TIMBUART_ISR);  in timbuart_startup()
249 		port->membase + TIMBUART_IER);  in timbuart_startup()
251 	return request_irq(port->irq, timbuart_handleinterrupt, IRQF_SHARED,  in timbuart_startup()
255 static void timbuart_shutdown(struct uart_port *port)  in timbuart_shutdown()  argument
258 		container_of(port, struct timbuart_port, port);  in timbuart_shutdown()
259 	dev_dbg(port->dev, "%s\n", __func__);  in timbuart_shutdown()
260 	free_irq(port->irq, uart);  in timbuart_shutdown()
261 	iowrite32(0, port->membase + TIMBUART_IER);  in timbuart_shutdown()
263 	timbuart_flush_buffer(port);  in timbuart_shutdown()
277 static void timbuart_set_termios(struct uart_port *port,  in timbuart_set_termios()  argument
285 	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);  in timbuart_set_termios()
287 	dev_dbg(port->dev, "%s - bindex %d\n", __func__, bindex);  in timbuart_set_termios()
299 	spin_lock_irqsave(&port->lock, flags);  in timbuart_set_termios()
300 	iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE);  in timbuart_set_termios()
301 	uart_update_timeout(port, termios->c_cflag, baud);  in timbuart_set_termios()
302 	spin_unlock_irqrestore(&port->lock, flags);  in timbuart_set_termios()
305 static const char *timbuart_type(struct uart_port *port)  in timbuart_type()  argument
307 	return port->type == PORT_UNKNOWN ? "timbuart" : NULL;  in timbuart_type()
313 static void timbuart_release_port(struct uart_port *port)  in timbuart_release_port()  argument
315 	struct platform_device *pdev = to_platform_device(port->dev);  in timbuart_release_port()
319 	if (port->flags & UPF_IOREMAP) {  in timbuart_release_port()
320 		iounmap(port->membase);  in timbuart_release_port()
321 		port->membase = NULL;  in timbuart_release_port()
324 	release_mem_region(port->mapbase, size);  in timbuart_release_port()
327 static int timbuart_request_port(struct uart_port *port)  in timbuart_request_port()  argument
329 	struct platform_device *pdev = to_platform_device(port->dev);  in timbuart_request_port()
333 	if (!request_mem_region(port->mapbase, size, "timb-uart"))  in timbuart_request_port()
336 	if (port->flags & UPF_IOREMAP) {  in timbuart_request_port()
337 		port->membase = ioremap(port->mapbase, size);  in timbuart_request_port()
338 		if (port->membase == NULL) {  in timbuart_request_port()
339 			release_mem_region(port->mapbase, size);  in timbuart_request_port()
351 	if (ioread8(uart->port.membase + TIMBUART_IPR)) {  in timbuart_handleinterrupt()
352 		uart->last_ier = ioread32(uart->port.membase + TIMBUART_IER);  in timbuart_handleinterrupt()
355 		iowrite32(0, uart->port.membase + TIMBUART_IER);  in timbuart_handleinterrupt()
368 static void timbuart_config_port(struct uart_port *port, int flags)  in timbuart_config_port()  argument
371 		port->type = PORT_TIMBUART;  in timbuart_config_port()
372 		timbuart_request_port(port);  in timbuart_config_port()
376 static int timbuart_verify_port(struct uart_port *port,  in timbuart_verify_port()  argument
427 	uart->port.uartclk = 3250000 * 16;  in timbuart_probe()
428 	uart->port.fifosize  = TIMBUART_FIFO_SIZE;  in timbuart_probe()
429 	uart->port.regshift  = 2;  in timbuart_probe()
430 	uart->port.iotype  = UPIO_MEM;  in timbuart_probe()
431 	uart->port.ops = &timbuart_ops;  in timbuart_probe()
432 	uart->port.irq = 0;  in timbuart_probe()
433 	uart->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;  in timbuart_probe()
434 	uart->port.line  = 0;  in timbuart_probe()
435 	uart->port.dev	= &dev->dev;  in timbuart_probe()
442 	uart->port.mapbase = iomem->start;  in timbuart_probe()
443 	uart->port.membase = NULL;  in timbuart_probe()
450 	uart->port.irq = irq;  in timbuart_probe()
458 	err = uart_add_one_port(&timbuart_driver, &uart->port);  in timbuart_probe()
482 	uart_remove_one_port(&timbuart_driver, &uart->port);  in timbuart_remove()