1 // SPDX-License-Identifier: GPL-2.0
16  * IP Cores Z025 and Z057 can have up to 4 UART
22  * +------+-------+-------+-------+-------+-------+-------+-------+
24  * +------+-------+-------+-------+-------+-------+-------+-------+
54  * The Z125 16550-compatible UART has no fixed base clock assigned
64 	dev_info(&mdev->dev, "%s on board %s\n",  in men_lookup_uartclk()
65 		dev_name(&mdev->dev),  in men_lookup_uartclk()
66 		mdev->bus->name);  in men_lookup_uartclk()
67 	if  (strncmp(mdev->bus->name, "F075", 4) == 0)  in men_lookup_uartclk()
69 	else if (strncmp(mdev->bus->name, "F216", 4) == 0)  in men_lookup_uartclk()
71 	else if (strncmp(mdev->bus->name, "F210", 4) == 0)  in men_lookup_uartclk()
73 	else if (strstr(mdev->bus->name, "215"))  in men_lookup_uartclk()
76 		dev_info(&mdev->dev,  in men_lookup_uartclk()
90 	if (!request_mem_region(mem_res->start + MEN_Z025_REGISTER_OFFSET,  in read_uarts_available_from_register()
92 		return -EBUSY;  in read_uarts_available_from_register()
95 	mem = ioremap(mem_res->start + MEN_Z025_REGISTER_OFFSET,  in read_uarts_available_from_register()
98 		release_mem_region(mem_res->start + MEN_Z025_REGISTER_OFFSET,  in read_uarts_available_from_register()
100 		return -ENOMEM;  in read_uarts_available_from_register()
107 	release_mem_region(mem_res->start + MEN_Z025_REGISTER_OFFSET,  in read_uarts_available_from_register()
133 			serial_data->offset[count] = MEN_UART1_OFFSET;  in read_serial_data()
137 			serial_data->offset[count] = MEN_UART2_OFFSET;  in read_serial_data()
141 			serial_data->offset[count] = MEN_UART3_OFFSET;  in read_serial_data()
145 			serial_data->offset[count] = MEN_UART4_OFFSET;  in read_serial_data()
149 			return -EINVAL;  in read_serial_data()
154 		dev_err(&mdev->dev, "unexpected number of ports: %u\n",  in read_serial_data()
156 		return -ENODEV;  in read_serial_data()
159 	serial_data->num_ports = count;  in read_serial_data()
168 	switch (mdev->id) {  in init_serial_data()
170 		serial_data->num_ports = 1;  in init_serial_data()
171 		serial_data->offset[0] = 0;  in init_serial_data()
177 		dev_err(&mdev->dev, "no supported device!\n");  in init_serial_data()
178 		return -ENODEV;  in init_serial_data()
185 	struct uart_8250_port uart;  in serial_8250_men_mcb_probe()  local
193 		return -ENXIO;  in serial_8250_men_mcb_probe()
195 	data = devm_kzalloc(&mdev->dev,  in serial_8250_men_mcb_probe()
199 		return -ENOMEM;  in serial_8250_men_mcb_probe()
205 	dev_dbg(&mdev->dev, "found a 16z%03u with %u ports\n",  in serial_8250_men_mcb_probe()
206 		mdev->id, data->num_ports);  in serial_8250_men_mcb_probe()
210 	for (i = 0; i < data->num_ports; i++) {  in serial_8250_men_mcb_probe()
211 		memset(&uart, 0, sizeof(struct uart_8250_port));  in serial_8250_men_mcb_probe()
212 		spin_lock_init(&uart.port.lock);  in serial_8250_men_mcb_probe()
214 		uart.port.flags = UPF_SKIP_TEST |  in serial_8250_men_mcb_probe()
218 		uart.port.iotype = UPIO_MEM;  in serial_8250_men_mcb_probe()
219 		uart.port.uartclk = men_lookup_uartclk(mdev);  in serial_8250_men_mcb_probe()
220 		uart.port.irq = mcb_get_irq(mdev);  in serial_8250_men_mcb_probe()
221 		uart.port.mapbase = (unsigned long) mem->start  in serial_8250_men_mcb_probe()
222 					    + data->offset[i];  in serial_8250_men_mcb_probe()
225 		res = serial8250_register_8250_port(&uart);  in serial_8250_men_mcb_probe()
227 			dev_err(&mdev->dev, "unable to register UART port\n");  in serial_8250_men_mcb_probe()
231 		data->line[i] = res;  in serial_8250_men_mcb_probe()
232 		dev_info(&mdev->dev, "found MCB UART: ttyS%d\n", data->line[i]);  in serial_8250_men_mcb_probe()
246 	for (i = 0; i < data->num_ports; i++)  in serial_8250_men_mcb_remove()
247 		serial8250_unregister_port(data->line[i]);  in serial_8250_men_mcb_remove()
269 MODULE_DESCRIPTION("MEN 8250 UART driver");