arch/arm/mach-ns9xxx/plat-serial8250.c

   1 /*
   2  * arch/arm/mach-ns9xxx/plat-serial8250.c
   3  *
   4  * Copyright (C) 2008 by Digi International Inc.
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11 #include <linux/platform_device.h>
  12 #include <linux/serial_8250.h>
  13 #include <linux/slab.h>
  14
  15 #include <mach/regs-board-a9m9750dev.h>
  16 #include <mach/board.h>
  17
  18 #define DRIVER_NAME "serial8250"
  19
  20 static int __init ns9xxx_plat_serial8250_init(void)
  21 {
  22         struct plat_serial8250_port *pdata;
  23         struct platform_device *pdev;
  24         int ret = -ENOMEM;
  25         int i;
  26
  27         if (!board_is_a9m9750dev())
  28                 return -ENODEV;
  29
  30         pdev = platform_device_alloc(DRIVER_NAME, 0);
  31         if (!pdev)
  32                 goto err;
  33
  34         pdata = kzalloc(5 * sizeof(*pdata), GFP_KERNEL);
  35         if (!pdata)
  36                 goto err;
  37
  38         pdev->dev.platform_data = pdata;
  39
  40         pdata[0].iobase = FPGA_UARTA_BASE;
  41         pdata[1].iobase = FPGA_UARTB_BASE;
  42         pdata[2].iobase = FPGA_UARTC_BASE;
  43         pdata[3].iobase = FPGA_UARTD_BASE;
  44
  45         for (i = 0; i < 4; ++i) {
  46                 pdata[i].membase = (void __iomem *)pdata[i].iobase;
  47                 pdata[i].mapbase = pdata[i].iobase;
  48                 pdata[i].iotype = UPIO_MEM;
  49                 pdata[i].uartclk = 18432000;
  50                 pdata[i].flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
  51         }
  52
  53         pdata[0].irq = IRQ_FPGA_UARTA;
  54         pdata[1].irq = IRQ_FPGA_UARTB;
  55         pdata[2].irq = IRQ_FPGA_UARTC;
  56         pdata[3].irq = IRQ_FPGA_UARTD;
  57
  58         ret = platform_device_add(pdev);
  59         if (ret) {
  60 err:
  61                 platform_device_put(pdev);
  62
  63                 printk(KERN_WARNING "Could not add %s (errno=%d)\n",
  64                                 DRIVER_NAME, ret);
  65         }
  66
  67         return 0;
  68 }
  69
  70 arch_initcall(ns9xxx_plat_serial8250_init);