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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2007 MIPS Technologies, Inc.
7 * written by Ralf Baechle (ralf@linux-mips.org)
8 *
9 * Probe driver for the Malta's UART ports:
10 *
11 * o 2 ports in the SMC SuperIO
12 * o 1 port in the CBUS UART, a discrete 16550 which normally is only used
13 * for bringups.
14 *
15 * We don't use 8250_platform.c on Malta as it would result in the CBUS
16 * UART becoming ttyS0.
17 */
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/serial_8250.h>
21
22#define SMC_PORT(base, int) \
23{ \
24 .iobase = base, \
25 .irq = int, \
26 .uartclk = 1843200, \
27 .iotype = UPIO_PORT, \
28 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
29 .regshift = 0, \
30}
31
32#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
33
34static struct plat_serial8250_port uart8250_data[] = {
35 SMC_PORT(0x3F8, 4),
36 SMC_PORT(0x2F8, 3),
37 {
38 .mapbase = 0x1f000900, /* The CBUS UART */
39 .irq = MIPS_CPU_IRQ_BASE + 2,
40 .uartclk = 3686400, /* Twice the usual clk! */
41 .iotype = UPIO_MEM32,
42 .flags = CBUS_UART_FLAGS,
43 .regshift = 3,
44 },
45 { },
46};
47
48static struct platform_device uart8250_device = {
49 .name = "serial8250",
50 .id = PLAT8250_DEV_PLATFORM2,
51 .dev = {
52 .platform_data = uart8250_data,
53 },
54};
55
56static int __init uart8250_init(void)
57{
58 return platform_device_register(&uart8250_device);
59}
60
61module_init(uart8250_init);
62
63MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
64MODULE_LICENSE("GPL");
65MODULE_DESCRIPTION("8250 UART probe driver for the Malta CBUS UART");