3  * timbuart.c timberdale FPGA UART driver
8  * Timberdale FPGA UART
55 	struct timbuart_port *uart =  in timbuart_start_tx()  local
59 	tasklet_schedule(&uart->tasklet);  in timbuart_start_tx()
121 	struct timbuart_port *uart =  in timbuart_handle_tx_port()  local
140 		*ier |= uart->last_ier & TXFLAGS;  in timbuart_handle_tx_port()
177 	struct timbuart_port *uart = from_tasklet(uart, t, tasklet);  in timbuart_tasklet()  local
180 	spin_lock(&uart->port.lock);  in timbuart_tasklet()
182 	isr = ioread32(uart->port.membase + TIMBUART_ISR);  in timbuart_tasklet()
183 	dev_dbg(uart->port.dev, "%s ISR: %x\n", __func__, isr);  in timbuart_tasklet()
185 	if (!uart->usedma)  in timbuart_tasklet()
186 		timbuart_handle_tx_port(&uart->port, isr, &ier);  in timbuart_tasklet()
188 	timbuart_mctrl_check(&uart->port, isr, &ier);  in timbuart_tasklet()
190 	if (!uart->usedma)  in timbuart_tasklet()
191 		timbuart_handle_rx_port(&uart->port, isr, &ier);  in timbuart_tasklet()
193 	iowrite32(ier, uart->port.membase + TIMBUART_IER);  in timbuart_tasklet()
195 	spin_unlock(&uart->port.lock);  in timbuart_tasklet()
196 	dev_dbg(uart->port.dev, "%s leaving\n", __func__);  in timbuart_tasklet()
242 	struct timbuart_port *uart =  in timbuart_startup()  local
254 		"timb-uart", uart);  in timbuart_startup()
259 	struct timbuart_port *uart =  in timbuart_shutdown()  local
262 	free_irq(port->irq, uart);  in timbuart_shutdown()
335 	if (!request_mem_region(port->mapbase, size, "timb-uart"))  in timbuart_request_port()
351 	struct timbuart_port *uart = (struct timbuart_port *)devid;  in timbuart_handleinterrupt()  local
353 	if (ioread8(uart->port.membase + TIMBUART_IPR)) {  in timbuart_handleinterrupt()
354 		uart->last_ier = ioread32(uart->port.membase + TIMBUART_IER);  in timbuart_handleinterrupt()
357 		iowrite32(0, uart->port.membase + TIMBUART_IER);  in timbuart_handleinterrupt()
360 		tasklet_schedule(&uart->tasklet);  in timbuart_handleinterrupt()
416 	struct timbuart_port *uart;  in timbuart_probe()  local
421 	uart = kzalloc(sizeof(*uart), GFP_KERNEL);  in timbuart_probe()
422 	if (!uart) {  in timbuart_probe()
427 	uart->usedma = 0;  in timbuart_probe()
429 	uart->port.uartclk = 3250000 * 16;  in timbuart_probe()
430 	uart->port.fifosize  = TIMBUART_FIFO_SIZE;  in timbuart_probe()
431 	uart->port.regshift  = 2;  in timbuart_probe()
432 	uart->port.iotype  = UPIO_MEM;  in timbuart_probe()
433 	uart->port.ops = &timbuart_ops;  in timbuart_probe()
434 	uart->port.irq = 0;  in timbuart_probe()
435 	uart->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;  in timbuart_probe()
436 	uart->port.line  = 0;  in timbuart_probe()
437 	uart->port.dev	= &dev->dev;  in timbuart_probe()
444 	uart->port.mapbase = iomem->start;  in timbuart_probe()
445 	uart->port.membase = NULL;  in timbuart_probe()
452 	uart->port.irq = irq;  in timbuart_probe()
454 	tasklet_setup(&uart->tasklet, timbuart_tasklet);  in timbuart_probe()
460 	err = uart_add_one_port(&timbuart_driver, &uart->port);  in timbuart_probe()
464 	platform_set_drvdata(dev, uart);  in timbuart_probe()
471 	kfree(uart);  in timbuart_probe()
473 	printk(KERN_ERR "timberdale: Failed to register Timberdale UART: %d\n",  in timbuart_probe()
481 	struct timbuart_port *uart = platform_get_drvdata(dev);  in timbuart_remove()  local
483 	tasklet_kill(&uart->tasklet);  in timbuart_remove()
484 	uart_remove_one_port(&timbuart_driver, &uart->port);  in timbuart_remove()
486 	kfree(uart);  in timbuart_remove()
493 		.name	= "timb-uart",
501 MODULE_DESCRIPTION("Timberdale UART driver");
503 MODULE_ALIAS("platform:timb-uart");