drivers/serial/bast_sio.c

   1 /* linux/drivers/serial/bast_sio.c
   2  *
   3  * Copyright (c) 2004 Simtec Electronics
   4  *   Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * http://www.simtec.co.uk/products/EB2410ITX/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Modifications:
  13  *      23-Sep-2004  BJD  Added copyright header
  14  *      23-Sep-2004  BJD  Added serial port remove code
  15 */
  16
  17 #include <linux/module.h>
  18 #include <linux/config.h>
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/tty.h>
  22 #include <linux/serial.h>
  23 #include <linux/serial_core.h>
  24 #include <linux/types.h>
  25
  26 #include <asm/io.h>
  27 #include <asm/serial.h>
  28 #include <asm/mach-types.h>
  29
  30 #include <asm/arch/map.h>
  31 #include <asm/arch/irqs.h>
  32 #include <asm/arch/bast-map.h>
  33 #include <asm/arch/bast-irq.h>
  34
  35 static int __init serial_bast_register(unsigned long port, unsigned int irq)
  36 {
  37         struct serial_struct serial_req;
  38
  39         serial_req.flags      = UPF_AUTOPROBE | UPF_SHARE_IRQ;
  40         serial_req.baud_base  = BASE_BAUD;
  41         serial_req.irq        = irq;
  42         serial_req.io_type    = UPIO_MEM;
  43         serial_req.iomap_base = port;
  44         serial_req.iomem_base = ioremap(port, 0x10);
  45         serial_req.iomem_reg_shift = 0;
  46
  47         return register_serial(&serial_req);
  48 }
  49
  50 #define SERIAL_BASE (S3C2410_CS2 + BAST_PA_SUPERIO)
  51
  52 static int port[2] = { -1, -1 };
  53
  54 static int __init serial_bast_init(void)
  55 {
  56         if (machine_is_bast()) {
  57                 port[0] = serial_bast_register(SERIAL_BASE + 0x2f8, IRQ_PCSERIAL1);
  58                 port[1] = serial_bast_register(SERIAL_BASE + 0x3f8, IRQ_PCSERIAL2);
  59         }
  60
  61         return 0;
  62 }
  63
  64 static void __exit serial_bast_exit(void)
  65 {
  66         if (port[0] != -1)
  67                 unregister_serial(port[0]);
  68         if (port[1] != -1)
  69                 unregister_serial(port[1]);
  70 }
  71
  72
  73 module_init(serial_bast_init);
  74 module_exit(serial_bast_exit);
  75
  76 MODULE_LICENSE("GPL");
  77 MODULE_AUTHOR("Ben Dooks, ben@simtec.co.uk");
  78 MODULE_DESCRIPTION("BAST Onboard Serial setup");
  79
  80