xref: /openbmc/linux/arch/mips/bcm63xx/dev-uart.c (revision c4f7ac64)
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) 2008 Maxime Bizon <mbizon@freebox.fr>
7  */
8 
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/platform_device.h>
12 #include <bcm63xx_cpu.h>
13 
14 static struct resource uart0_resources[] = {
15 	{
16 		/* start & end filled at runtime */
17 		.flags		= IORESOURCE_MEM,
18 	},
19 	{
20 		/* start filled at runtime */
21 		.flags		= IORESOURCE_IRQ,
22 	},
23 };
24 
25 static struct resource uart1_resources[] = {
26 	{
27 		/* start & end filled at runtime */
28 		.flags		= IORESOURCE_MEM,
29 	},
30 	{
31 		/* start filled at runtime */
32 		.flags		= IORESOURCE_IRQ,
33 	},
34 };
35 
36 static struct platform_device bcm63xx_uart_devices[] = {
37 	{
38 		.name		= "bcm63xx_uart",
39 		.id		= 0,
40 		.num_resources	= ARRAY_SIZE(uart0_resources),
41 		.resource	= uart0_resources,
42 	},
43 
44 	{
45 		.name		= "bcm63xx_uart",
46 		.id		= 1,
47 		.num_resources	= ARRAY_SIZE(uart1_resources),
48 		.resource	= uart1_resources,
49 	}
50 };
51 
52 int __init bcm63xx_uart_register(unsigned int id)
53 {
54 	if (id >= ARRAY_SIZE(bcm63xx_uart_devices))
55 		return -ENODEV;
56 
57 	if (id == 1 && (!BCMCPU_IS_3368() && !BCMCPU_IS_6358() &&
58 		!BCMCPU_IS_6368()))
59 		return -ENODEV;
60 
61 	if (id == 0) {
62 		uart0_resources[0].start = bcm63xx_regset_address(RSET_UART0);
63 		uart0_resources[0].end = uart0_resources[0].start +
64 			RSET_UART_SIZE - 1;
65 		uart0_resources[1].start = bcm63xx_get_irq_number(IRQ_UART0);
66 	}
67 
68 	if (id == 1) {
69 		uart1_resources[0].start = bcm63xx_regset_address(RSET_UART1);
70 		uart1_resources[0].end = uart1_resources[0].start +
71 			RSET_UART_SIZE - 1;
72 		uart1_resources[1].start = bcm63xx_get_irq_number(IRQ_UART1);
73 	}
74 
75 	return platform_device_register(&bcm63xx_uart_devices[id]);
76 }
77