arch/mips/loongson/common/serial.c

   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 Ralf Baechle (ralf@linux-mips.org)
   7  *
   8  * Copyright (C) 2009 Lemote, Inc.
   9  * Author: Yan hua (yanhua@lemote.com)
  10  * Author: Wu Zhangjin (wuzj@lemote.com)
  11  */
  12
  13 #include <linux/io.h>
  14 #include <linux/init.h>
  15 #include <linux/serial_8250.h>
  16
  17 #include <asm/bootinfo.h>
  18
  19 #include <loongson.h>
  20 #include <machine.h>
  21
  22 #define PORT(int)                       \
  23 {                                                               \
  24         .irq            = int,                                  \
  25         .uartclk        = 1843200,                              \
  26         .iobase         = (LOONGSON_UART_BASE - LOONGSON_PCIIO_BASE),\
  27         .iotype         = UPIO_PORT,                            \
  28         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
  29         .regshift       = 0,                                    \
  30 }
  31
  32 #define PORT_M(int)                             \
  33 {                                                               \
  34         .irq            = MIPS_CPU_IRQ_BASE + (int),            \
  35         .uartclk        = 3686400,                              \
  36         .iotype         = UPIO_MEM,                             \
  37         .membase        = (void __iomem *)NULL,                 \
  38         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
  39         .regshift       = 0,                                    \
  40 }
  41
  42 static struct plat_serial8250_port uart8250_data[][2] = {
  43         [MACH_LOONGSON_UNKNOWN]         {},
  44         [MACH_LEMOTE_FL2E]              {PORT(4), {} },
  45         [MACH_LEMOTE_FL2F]              {PORT(3), {} },
  46         [MACH_LEMOTE_ML2F7]             {PORT_M(3), {} },
  47         [MACH_LEMOTE_YL2F89]            {PORT_M(3), {} },
  48         [MACH_DEXXON_GDIUM2F10]         {PORT_M(3), {} },
  49         [MACH_LOONGSON_END]             {},
  50 };
  51
  52 static struct platform_device uart8250_device = {
  53         .name = "serial8250",
  54         .id = PLAT8250_DEV_PLATFORM,
  55         .dev = {
  56                 .platform_data = uart8250_data[LOONGSON_MACHTYPE],
  57                 },
  58 };
  59
  60 static int __init serial_init(void)
  61 {
  62         if (uart8250_data[LOONGSON_MACHTYPE][0].iotype == UPIO_MEM)
  63                 uart8250_data[LOONGSON_MACHTYPE][0].membase =
  64                         ioremap_nocache(LOONGSON_UART_BASE, 8);
  65
  66         platform_device_register(&uart8250_device);
  67
  68         return 0;
  69 }
  70
  71 device_initcall(serial_init);