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plat-serial8250.c

/*
 * arch/arm/mach-ns9xxx/plat-serial8250.c
 *
 * Copyright (C) 2008 by Digi International Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/slab.h>

#include <mach/regs-board-a9m9750dev.h>
#include <mach/board.h>

#define DRIVER_NAME "serial8250"

static int __init ns9xxx_plat_serial8250_init(void)
{
      struct plat_serial8250_port *pdata;
      struct platform_device *pdev;
      int ret = -ENOMEM;
      int i;

      if (!board_is_a9m9750dev())
            return -ENODEV;

      pdev = platform_device_alloc(DRIVER_NAME, 0);
      if (!pdev)
            goto err;

      pdata = kzalloc(5 * sizeof(*pdata), GFP_KERNEL);
      if (!pdata)
            goto err;

      pdev->dev.platform_data = pdata;

      pdata[0].iobase = FPGA_UARTA_BASE;
      pdata[1].iobase = FPGA_UARTB_BASE;
      pdata[2].iobase = FPGA_UARTC_BASE;
      pdata[3].iobase = FPGA_UARTD_BASE;

      for (i = 0; i < 4; ++i) {
            pdata[i].membase = (void __iomem *)pdata[i].iobase;
            pdata[i].mapbase = pdata[i].iobase;
            pdata[i].iotype = UPIO_MEM;
            pdata[i].uartclk = 18432000;
            pdata[i].flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
      }

      pdata[0].irq = IRQ_FPGA_UARTA;
      pdata[1].irq = IRQ_FPGA_UARTB;
      pdata[2].irq = IRQ_FPGA_UARTC;
      pdata[3].irq = IRQ_FPGA_UARTD;

      ret = platform_device_add(pdev);
      if (ret) {
err:
            platform_device_put(pdev);

            printk(KERN_WARNING "Could not add %s (errno=%d)\n",
                        DRIVER_NAME, ret);
      }

      return 0;
}

arch_initcall(ns9xxx_plat_serial8250_init);

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