LXR linux/arch/mips/cobalt/serial.c

   1/*
   2 *  Registration of Cobalt UART platform device.
   3 *
   4 *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
   5 *
   6 *  This program is free software; you can redistribute it and/or modify
   7 *  it under the terms of the GNU General Public License as published by
   8 *  the Free Software Foundation; either version 2 of the License, or
   9 *  (at your option) any later version.
  10 *
  11 *  This program is distributed in the hope that it will be useful,
  12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *  GNU General Public License for more details.
  15 *
  16 *  You should have received a copy of the GNU General Public License
  17 *  along with this program; if not, write to the Free Software
  18 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19 */
  20#include <linux/errno.h>
  21#include <linux/init.h>
  22#include <linux/ioport.h>
  23#include <linux/platform_device.h>
  24#include <linux/serial_8250.h>
  25
  26#include <cobalt.h>
  27#include <irq.h>
  28
  29static struct resource cobalt_uart_resource[] __initdata = {
  30        {
  31                .start  = 0x1c800000,
  32                .end    = 0x1c800007,
  33                .flags  = IORESOURCE_MEM,
  34        },
  35        {
  36                .start  = SERIAL_IRQ,
  37                .end    = SERIAL_IRQ,
  38                .flags  = IORESOURCE_IRQ,
  39        },
  40};
  41
  42static struct plat_serial8250_port cobalt_serial8250_port[] = {
  43        {
  44                .irq            = SERIAL_IRQ,
  45                .uartclk        = 18432000,
  46                .iotype         = UPIO_MEM,
  47                .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  48                .mapbase        = 0x1c800000,
  49        },
  50        {},
  51};
  52
  53static __init int cobalt_uart_add(void)
  54{
  55        struct platform_device *pdev;
  56        int retval;
  57
  58        /*
  59         * Cobalt Qube1 has no UART.
  60         */
  61        if (cobalt_board_id == COBALT_BRD_ID_QUBE1)
  62                return 0;
  63
  64        pdev = platform_device_alloc("serial8250", -1);
  65        if (!pdev)
  66                return -ENOMEM;
  67
  68        pdev->id = PLAT8250_DEV_PLATFORM;
  69        pdev->dev.platform_data = cobalt_serial8250_port;
  70
  71        retval = platform_device_add_resources(pdev, cobalt_uart_resource, ARRAY_SIZE(cobalt_uart_resource));
  72        if (retval)
  73                goto err_free_device;
  74
  75        retval = platform_device_add(pdev);
  76        if (retval)
  77                goto err_free_device;
  78
  79        return 0;
  80
  81err_free_device:
  82        platform_device_put(pdev);
  83
  84        return retval;
  85}
  86device_initcall(cobalt_uart_add);
  87