drivers/serial/8250_au1x00.c

   1 /*
   2  * Serial Device Initialisation for Au1x00
   3  *
   4  * (C) Copyright Embedded Alley Solutions, Inc 2005
   5  * Author: Pantelis Antoniou <pantelis@embeddedalley.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 #include <linux/errno.h>
  14 #include <linux/init.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/ioport.h>
  17 #include <linux/module.h>
  18 #include <linux/serial_core.h>
  19 #include <linux/signal.h>
  20 #include <linux/slab.h>
  21 #include <linux/types.h>
  22
  23 #include <linux/serial_8250.h>
  24
  25 #include <asm/mach-au1x00/au1000.h>
  26
  27 #include "8250.h"
  28
  29 #define PORT(_base, _irq)                               \
  30         {                                               \
  31                 .iobase         = _base,                \
  32                 .membase        = (void __iomem *)_base,\
  33                 .mapbase        = _base,                \
  34                 .irq            = _irq,                 \
  35                 .uartclk        = 0,    /* filled */    \
  36                 .regshift       = 2,                    \
  37                 .iotype         = UPIO_AU,              \
  38                 .flags          = UPF_SKIP_TEST |       \
  39                                   UPF_IOREMAP,          \
  40         }
  41
  42 static struct plat_serial8250_port au1x00_data[] = {
  43 #if defined(CONFIG_SOC_AU1000)
  44         PORT(UART0_ADDR, AU1000_UART0_INT),
  45         PORT(UART1_ADDR, AU1000_UART1_INT),
  46         PORT(UART2_ADDR, AU1000_UART2_INT),
  47         PORT(UART3_ADDR, AU1000_UART3_INT),
  48 #elif defined(CONFIG_SOC_AU1500)
  49         PORT(UART0_ADDR, AU1500_UART0_INT),
  50         PORT(UART3_ADDR, AU1500_UART3_INT),
  51 #elif defined(CONFIG_SOC_AU1100)
  52         PORT(UART0_ADDR, AU1100_UART0_INT),
  53         PORT(UART1_ADDR, AU1100_UART1_INT),
  54         PORT(UART2_ADDR, AU1100_UART2_INT),
  55         PORT(UART3_ADDR, AU1100_UART3_INT),
  56 #elif defined(CONFIG_SOC_AU1550)
  57         PORT(UART0_ADDR, AU1550_UART0_INT),
  58         PORT(UART1_ADDR, AU1550_UART1_INT),
  59         PORT(UART2_ADDR, AU1550_UART2_INT),
  60         PORT(UART3_ADDR, AU1550_UART3_INT),
  61 #elif defined(CONFIG_SOC_AU1200)
  62         PORT(UART0_ADDR, AU1200_UART0_INT),
  63         PORT(UART1_ADDR, AU1200_UART1_INT),
  64 #endif
  65         { },
  66 };
  67
  68 static struct platform_device au1x00_device = {
  69         .name                   = "serial8250",
  70         .id                     = PLAT8250_DEV_AU1X00,
  71         .dev                    = {
  72                 .platform_data  = au1x00_data,
  73         },
  74 };
  75
  76 static int __init au1x00_init(void)
  77 {
  78         int i;
  79         unsigned int uartclk;
  80
  81         /* get uart clock */
  82         uartclk = get_au1x00_uart_baud_base() * 16;
  83
  84         /* fill up uartclk */
  85         for (i = 0; au1x00_data[i].flags ; i++)
  86                 au1x00_data[i].uartclk = uartclk;
  87
  88         return platform_device_register(&au1x00_device);
  89 }
  90
  91 /* XXX: Yes, I know this doesn't yet work. */
  92 static void __exit au1x00_exit(void)
  93 {
  94         platform_device_unregister(&au1x00_device);
  95 }
  96
  97 module_init(au1x00_init);
  98 module_exit(au1x00_exit);
  99
 100 MODULE_AUTHOR("Pantelis Antoniou <pantelis@embeddedalley.com>");
 101 MODULE_DESCRIPTION("8250 serial probe module for Au1x000 cards");
 102 MODULE_LICENSE("GPL");