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e7c4782f RB |
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 | * | |
566a3b95 | 6 | * Copyright (C) 2006, 07 MIPS Technologies, Inc. |
e7c4782f | 7 | * written by Ralf Baechle (ralf@linux-mips.org) |
566a3b95 | 8 | * written by Ralf Baechle <ralf@linux-mips.org> |
e7c4782f | 9 | * |
192cc7f0 TC |
10 | * Copyright (C) 2008 Wind River Systems, Inc. |
11 | * updated by Tiejun Chen <tiejun.chen@windriver.com> | |
12 | * | |
13 | * 1. Probe driver for the Malta's UART ports: | |
e7c4782f RB |
14 | * |
15 | * o 2 ports in the SMC SuperIO | |
16 | * o 1 port in the CBUS UART, a discrete 16550 which normally is only used | |
17 | * for bringups. | |
18 | * | |
19 | * We don't use 8250_platform.c on Malta as it would result in the CBUS | |
20 | * UART becoming ttyS0. | |
192cc7f0 TC |
21 | * |
22 | * 2. Register RTC-CMOS platform device on Malta. | |
e7c4782f | 23 | */ |
e7c4782f RB |
24 | #include <linux/init.h> |
25 | #include <linux/serial_8250.h> | |
ca4d3e67 | 26 | #include <linux/irq.h> |
192cc7f0 | 27 | #include <linux/platform_device.h> |
225ae5fd | 28 | #include <asm/mips-boards/maltaint.h> |
e7c4782f RB |
29 | |
30 | #define SMC_PORT(base, int) \ | |
31 | { \ | |
32 | .iobase = base, \ | |
33 | .irq = int, \ | |
34 | .uartclk = 1843200, \ | |
35 | .iotype = UPIO_PORT, \ | |
78884783 MR |
36 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | \ |
37 | UPF_MAGIC_MULTIPLIER, \ | |
e7c4782f RB |
38 | .regshift = 0, \ |
39 | } | |
40 | ||
41 | #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP) | |
42 | ||
43 | static struct plat_serial8250_port uart8250_data[] = { | |
44 | SMC_PORT(0x3F8, 4), | |
45 | SMC_PORT(0x2F8, 3), | |
46 | { | |
47 | .mapbase = 0x1f000900, /* The CBUS UART */ | |
225ae5fd | 48 | .irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2, |
e7c4782f | 49 | .uartclk = 3686400, /* Twice the usual clk! */ |
9a936d6c MR |
50 | .iotype = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ? |
51 | UPIO_MEM32BE : UPIO_MEM32, | |
e7c4782f RB |
52 | .flags = CBUS_UART_FLAGS, |
53 | .regshift = 3, | |
54 | }, | |
55 | { }, | |
56 | }; | |
57 | ||
192cc7f0 | 58 | static struct platform_device malta_uart8250_device = { |
e7c4782f | 59 | .name = "serial8250", |
566a3b95 | 60 | .id = PLAT8250_DEV_PLATFORM, |
e7c4782f RB |
61 | .dev = { |
62 | .platform_data = uart8250_data, | |
63 | }, | |
64 | }; | |
65 | ||
192cc7f0 TC |
66 | static struct platform_device *malta_devices[] __initdata = { |
67 | &malta_uart8250_device, | |
192cc7f0 TC |
68 | }; |
69 | ||
70 | static int __init malta_add_devices(void) | |
e7c4782f | 71 | { |
db19462b | 72 | return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices)); |
192cc7f0 | 73 | } |
e7c4782f | 74 | |
192cc7f0 | 75 | device_initcall(malta_add_devices); |