[MIPS] Cobalt: Enable UART on RaQ1
[linux-2.6.git] / arch / mips / cobalt / serial.c
1 /*
2  *  Registration of Cobalt UART platform device.
3  *
4  *  Copyright (C) 2007  Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
19  */
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/ioport.h>
23 #include <linux/platform_device.h>
24 #include <linux/serial_8250.h>
25
26 #include <cobalt.h>
27
28 static struct resource cobalt_uart_resource[] __initdata = {
29         {
30                 .start  = 0x1c800000,
31                 .end    = 0x1c800007,
32                 .flags  = IORESOURCE_MEM,
33         },
34         {
35                 .start  = COBALT_SERIAL_IRQ,
36                 .end    = COBALT_SERIAL_IRQ,
37                 .flags  = IORESOURCE_IRQ,
38         },
39 };
40
41 static struct plat_serial8250_port cobalt_serial8250_port[] = {
42         {
43                 .irq            = COBALT_SERIAL_IRQ,
44                 .uartclk        = 18432000,
45                 .iotype         = UPIO_MEM,
46                 .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
47                 .mapbase        = 0x1c800000,
48         },
49         {},
50 };
51
52 static __init int cobalt_uart_add(void)
53 {
54         struct platform_device *pdev;
55         int retval;
56
57         /*
58          * Cobalt Qube1 has no UART.
59          */
60         if (cobalt_board_id == COBALT_BRD_ID_QUBE1)
61                 return 0;
62
63         pdev = platform_device_alloc("serial8250", -1);
64         if (!pdev)
65                 return -ENOMEM;
66
67         pdev->id = PLAT8250_DEV_PLATFORM;
68         pdev->dev.platform_data = cobalt_serial8250_port;
69
70         retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource));
71         if (retval)
72                 goto err_free_device;
73
74         retval = platform_device_add(pdev);
75         if (retval)
76                 goto err_free_device;
77
78         return 0;
79
80 err_free_device:
81         platform_device_put(pdev);
82
83         return retval;
84 }
85 device_initcall(cobalt_uart_add);