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/bootinfo.h>
  27 #include <asm/lasat/lasat.h>
  28 #include <asm/lasat/serial.h>
  29
  30 static struct resource lasat_serial_res[2] __initdata;
  31
  32 static struct plat_serial8250_port lasat_serial8250_port[] = {
  33         {
  34                 .iotype         = UPIO_MEM,
  35                 .flags          = UPF_IOREMAP | UPF_BOOT_AUTOCONF |
  36                                   UPF_SKIP_TEST,
  37         },
  38         {},
  39 };
  40
  41 static __init int lasat_uart_add(void)
  42 {
  43         struct platform_device *pdev;
  44         int retval;
  45
  46         pdev = platform_device_alloc("serial8250", -1);
  47         if (!pdev)
  48                 return -ENOMEM;
  49
  50         if (mips_machtype == MACH_LASAT_100) {
  51                 lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_100);
  52                 lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_100 * 8 - 1;
  53                 lasat_serial_res[0].flags = IORESOURCE_MEM;
  54                 lasat_serial_res[1].start = LASATINT_UART_100;
  55                 lasat_serial_res[1].end = LASATINT_UART_100;
  56                 lasat_serial_res[1].flags = IORESOURCE_IRQ;
  57
  58                 lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_100;
  59                 lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_100 * 16;
  60                 lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_100;
  61                 lasat_serial8250_port[0].irq = LASATINT_UART_100;
  62         } else {
  63                 lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_200);
  64                 lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_200 * 8 - 1;
  65                 lasat_serial_res[0].flags = IORESOURCE_MEM;
  66                 lasat_serial_res[1].start = LASATINT_UART_200;
  67                 lasat_serial_res[1].end = LASATINT_UART_200;
  68                 lasat_serial_res[1].flags = IORESOURCE_IRQ;
  69
  70                 lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_200;
  71                 lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_200 * 16;
  72                 lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_200;
  73                 lasat_serial8250_port[0].irq = LASATINT_UART_200;
  74         }
  75
  76         pdev->id = PLAT8250_DEV_PLATFORM;
  77         pdev->dev.platform_data = lasat_serial8250_port;
  78
  79         retval = platform_device_add_resources(pdev, lasat_serial_res, ARRAY_SIZE(lasat_serial_res));
  80         if (retval)
  81                 goto err_free_device;
  82
  83         retval = platform_device_add(pdev);
  84         if (retval)
  85                 goto err_free_device;
  86
  87         return 0;
  88
  89 err_free_device:
  90         platform_device_put(pdev);
  91
  92         return retval;
  93 }
  94 device_initcall(lasat_uart_add);