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

   1/*
   2 *  Registration of Lasat UART platform device.
   3 *
   4 *  Copyright (C) 2007  Brian Murphy <brian@murphy.dk>
   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 St, 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 <asm/lasat/lasat.h>
  27#include <asm/lasat/serial.h>
  28
  29static struct resource lasat_serial_res[2] __initdata;
  30
  31static struct plat_serial8250_port lasat_serial8250_port[] = {
  32        {
  33                .iotype         = UPIO_MEM,
  34                .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF |
  35                                  UPF_SKIP_TEST,
  36        },
  37        {},
  38};
  39
  40static __init int lasat_uart_add(void)
  41{
  42        struct platform_device *pdev;
  43        int retval;
  44
  45        pdev = platform_device_alloc("serial8250", -1);
  46        if (!pdev)
  47                return -ENOMEM;
  48
  49        if (!IS_LASAT_200()) {
  50                lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_100);
  51                lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_100 * 8 - 1;
  52                lasat_serial_res[0].flags = IORESOURCE_MEM;
  53                lasat_serial_res[1].start = LASATINT_UART_100;
  54                lasat_serial_res[1].end = LASATINT_UART_100;
  55                lasat_serial_res[1].flags = IORESOURCE_IRQ;
  56
  57                lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_100;
  58                lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_100 * 16;
  59                lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_100;
  60                lasat_serial8250_port[0].irq = LASATINT_UART_100;
  61        } else {
  62                lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_200);
  63                lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_200 * 8 - 1;
  64                lasat_serial_res[0].flags = IORESOURCE_MEM;
  65                lasat_serial_res[1].start = LASATINT_UART_200;
  66                lasat_serial_res[1].end = LASATINT_UART_200;
  67                lasat_serial_res[1].flags = IORESOURCE_IRQ;
  68
  69                lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_200;
  70                lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_200 * 16;
  71                lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_200;
  72                lasat_serial8250_port[0].irq = LASATINT_UART_200;
  73        }
  74
  75        pdev->id = PLAT8250_DEV_PLATFORM;
  76        pdev->dev.platform_data = lasat_serial8250_port;
  77
  78        retval = platform_device_add_resources(pdev, lasat_serial_res, ARRAY_SIZE(lasat_serial_res));
  79        if (retval)
  80                goto err_free_device;
  81
  82        retval = platform_device_add(pdev);
  83        if (retval)
  84                goto err_free_device;
  85
  86        return 0;
  87
  88err_free_device:
  89        platform_device_put(pdev);
  90
  91        return retval;
  92}
  93device_initcall(lasat_uart_add);
  94