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
  29 static struct resource lasat_serial_res[2] __initdata;
  30
  31 static 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
  40 static __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
  88 err_free_device:
  89         platform_device_put(pdev);
  90
  91         return retval;
  92 }
  93 device_initcall(lasat_uart_add);