arch/mips/vr41xx/common/siu.c

   1 /*
   2  *  NEC VR4100 series SIU platform device.
   3  *
   4  *  Copyright (C) 2007-2008  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_core.h>
  25 #include <linux/irq.h>
  26
  27 #include <asm/cpu.h>
  28 #include <asm/vr41xx/siu.h>
  29
  30 static unsigned int siu_type1_ports[SIU_PORTS_MAX] __initdata = {
  31         PORT_VR41XX_SIU,
  32         PORT_UNKNOWN,
  33 };
  34
  35 static struct resource siu_type1_resource[] __initdata = {
  36         {
  37                 .start  = 0x0c000000,
  38                 .end    = 0x0c00000a,
  39                 .flags  = IORESOURCE_MEM,
  40         },
  41         {
  42                 .start  = SIU_IRQ,
  43                 .end    = SIU_IRQ,
  44                 .flags  = IORESOURCE_IRQ,
  45         },
  46 };
  47
  48 static unsigned int siu_type2_ports[SIU_PORTS_MAX] __initdata = {
  49         PORT_VR41XX_SIU,
  50         PORT_VR41XX_DSIU,
  51 };
  52
  53 static struct resource siu_type2_resource[] __initdata = {
  54         {
  55                 .start  = 0x0f000800,
  56                 .end    = 0x0f00080a,
  57                 .flags  = IORESOURCE_MEM,
  58         },
  59         {
  60                 .start  = 0x0f000820,
  61                 .end    = 0x0f000829,
  62                 .flags  = IORESOURCE_MEM,
  63         },
  64         {
  65                 .start  = SIU_IRQ,
  66                 .end    = SIU_IRQ,
  67                 .flags  = IORESOURCE_IRQ,
  68         },
  69         {
  70                 .start  = DSIU_IRQ,
  71                 .end    = DSIU_IRQ,
  72                 .flags  = IORESOURCE_IRQ,
  73         },
  74 };
  75
  76 static int __init vr41xx_siu_add(void)
  77 {
  78         struct platform_device *pdev;
  79         struct resource *res;
  80         unsigned int num;
  81         int retval;
  82
  83         pdev = platform_device_alloc("SIU", -1);
  84         if (!pdev)
  85                 return -ENOMEM;
  86
  87         switch (current_cpu_type()) {
  88         case CPU_VR4111:
  89         case CPU_VR4121:
  90                 pdev->dev.platform_data = siu_type1_ports;
  91                 res = siu_type1_resource;
  92                 num = ARRAY_SIZE(siu_type1_resource);
  93                 break;
  94         case CPU_VR4122:
  95         case CPU_VR4131:
  96         case CPU_VR4133:
  97                 pdev->dev.platform_data = siu_type2_ports;
  98                 res = siu_type2_resource;
  99                 num = ARRAY_SIZE(siu_type2_resource);
 100                 break;
 101         default:
 102                 retval = -ENODEV;
 103                 goto err_free_device;
 104         }
 105
 106         retval = platform_device_add_resources(pdev, res, num);
 107         if (retval)
 108                 goto err_free_device;
 109
 110         retval = platform_device_add(pdev);
 111         if (retval)
 112                 goto err_free_device;
 113
 114         return 0;
 115
 116 err_free_device:
 117         platform_device_put(pdev);
 118
 119         return retval;
 120 }
 121 device_initcall(vr41xx_siu_add);
 122
 123 void __init vr41xx_siu_setup(void)
 124 {
 125         struct uart_port port;
 126         struct resource *res;
 127         unsigned int *type;
 128         int i;
 129
 130         switch (current_cpu_type()) {
 131         case CPU_VR4111:
 132         case CPU_VR4121:
 133                 type = siu_type1_ports;
 134                 res = siu_type1_resource;
 135                 break;
 136         case CPU_VR4122:
 137         case CPU_VR4131:
 138         case CPU_VR4133:
 139                 type = siu_type2_ports;
 140                 res = siu_type2_resource;
 141                 break;
 142         default:
 143                 return;
 144         }
 145
 146         for (i = 0; i < SIU_PORTS_MAX; i++) {
 147                 port.line = i;
 148                 port.type = type[i];
 149                 if (port.type == PORT_UNKNOWN)
 150                         break;
 151                 port.mapbase = res[i].start;
 152                 port.membase = (unsigned char __iomem *)KSEG1ADDR(res[i].start);
 153                 vr41xx_siu_early_setup(&port);
 154         }
 155 }