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
  14 #include <asm/arch-ns9xxx/regs-board-a9m9750dev.h>
  15 #include <asm/arch-ns9xxx/board.h>
  16
  17 #define DRIVER_NAME "serial8250"
  18
  19 static int __init ns9xxx_plat_serial8250_init(void)
  20 {
  21         struct plat_serial8250_port *pdata;
  22         struct platform_device *pdev;
  23         int ret = -ENOMEM;
  24         int i;
  25
  26         if (!board_is_a9m9750dev())
  27                 return -ENODEV;
  28
  29         pdev = platform_device_alloc(DRIVER_NAME, 0);
  30         if (!pdev)
  31                 goto err;
  32
  33         pdata = kzalloc(5 * sizeof(*pdata), GFP_KERNEL);
  34         if (!pdata)
  35                 goto err;
  36
  37         pdev->dev.platform_data = pdata;
  38
  39         pdata[0].iobase = FPGA_UARTA_BASE;
  40         pdata[1].iobase = FPGA_UARTB_BASE;
  41         pdata[2].iobase = FPGA_UARTC_BASE;
  42         pdata[3].iobase = FPGA_UARTD_BASE;
  43
  44         for (i = 0; i < 4; ++i) {
  45                 pdata[i].membase = (void __iomem *)pdata[i].iobase;
  46                 pdata[i].mapbase = pdata[i].iobase;
  47                 pdata[i].iotype = UPIO_MEM;
  48                 pdata[i].uartclk = 18432000;
  49                 pdata[i].flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
  50         }
  51
  52         pdata[0].irq = IRQ_FPGA_UARTA;
  53         pdata[1].irq = IRQ_FPGA_UARTB;
  54         pdata[2].irq = IRQ_FPGA_UARTC;
  55         pdata[3].irq = IRQ_FPGA_UARTD;
  56
  57         ret = platform_device_add(pdev);
  58         if (ret) {
  59 err:
  60                 platform_device_put(pdev);
  61
  62                 printk(KERN_WARNING "Could not add %s (errno=%d)\n",
  63                                 DRIVER_NAME, ret);
  64         }
  65
  66         return 0;
  67 }
  68
  69 arch_initcall(ns9xxx_plat_serial8250_init);