arch/mips/vr41xx/common/siu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  NEC VR4100 series SIU platform device.
   4  *
   5  *  Copyright (C) 2007-2008  Yoichi Yuasa <yuasa@linux-mips.org>
   6  */
   7 #include <linux/errno.h>
   8 #include <linux/init.h>
   9 #include <linux/ioport.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/serial_core.h>
  12 #include <linux/irq.h>
  13
  14 #include <asm/cpu.h>
  15 #include <asm/vr41xx/siu.h>
  16
  17 static unsigned int siu_type1_ports[SIU_PORTS_MAX] __initdata = {
  18         PORT_VR41XX_SIU,
  19         PORT_UNKNOWN,
  20 };
  21
  22 static struct resource siu_type1_resource[] __initdata = {
  23         {
  24                 .start  = 0x0c000000,
  25                 .end    = 0x0c00000a,
  26                 .flags  = IORESOURCE_MEM,
  27         },
  28         {
  29                 .start  = SIU_IRQ,
  30                 .end    = SIU_IRQ,
  31                 .flags  = IORESOURCE_IRQ,
  32         },
  33 };
  34
  35 static unsigned int siu_type2_ports[SIU_PORTS_MAX] __initdata = {
  36         PORT_VR41XX_SIU,
  37         PORT_VR41XX_DSIU,
  38 };
  39
  40 static struct resource siu_type2_resource[] __initdata = {
  41         {
  42                 .start  = 0x0f000800,
  43                 .end    = 0x0f00080a,
  44                 .flags  = IORESOURCE_MEM,
  45         },
  46         {
  47                 .start  = 0x0f000820,
  48                 .end    = 0x0f000829,
  49                 .flags  = IORESOURCE_MEM,
  50         },
  51         {
  52                 .start  = SIU_IRQ,
  53                 .end    = SIU_IRQ,
  54                 .flags  = IORESOURCE_IRQ,
  55         },
  56         {
  57                 .start  = DSIU_IRQ,
  58                 .end    = DSIU_IRQ,
  59                 .flags  = IORESOURCE_IRQ,
  60         },
  61 };
  62
  63 static int __init vr41xx_siu_add(void)
  64 {
  65         struct platform_device *pdev;
  66         struct resource *res;
  67         unsigned int num;
  68         int retval;
  69
  70         pdev = platform_device_alloc("SIU", -1);
  71         if (!pdev)
  72                 return -ENOMEM;
  73
  74         switch (current_cpu_type()) {
  75         case CPU_VR4111:
  76         case CPU_VR4121:
  77                 pdev->dev.platform_data = siu_type1_ports;
  78                 res = siu_type1_resource;
  79                 num = ARRAY_SIZE(siu_type1_resource);
  80                 break;
  81         case CPU_VR4122:
  82         case CPU_VR4131:
  83         case CPU_VR4133:
  84                 pdev->dev.platform_data = siu_type2_ports;
  85                 res = siu_type2_resource;
  86                 num = ARRAY_SIZE(siu_type2_resource);
  87                 break;
  88         default:
  89                 retval = -ENODEV;
  90                 goto err_free_device;
  91         }
  92
  93         retval = platform_device_add_resources(pdev, res, num);
  94         if (retval)
  95                 goto err_free_device;
  96
  97         retval = platform_device_add(pdev);
  98         if (retval)
  99                 goto err_free_device;
 100
 101         return 0;
 102
 103 err_free_device:
 104         platform_device_put(pdev);
 105
 106         return retval;
 107 }
 108 device_initcall(vr41xx_siu_add);
 109
 110 void __init vr41xx_siu_setup(void)
 111 {
 112         struct uart_port port;
 113         struct resource *res;
 114         unsigned int *type;
 115         int i;
 116
 117         switch (current_cpu_type()) {
 118         case CPU_VR4111:
 119         case CPU_VR4121:
 120                 type = siu_type1_ports;
 121                 res = siu_type1_resource;
 122                 break;
 123         case CPU_VR4122:
 124         case CPU_VR4131:
 125         case CPU_VR4133:
 126                 type = siu_type2_ports;
 127                 res = siu_type2_resource;
 128                 break;
 129         default:
 130                 return;
 131         }
 132
 133         for (i = 0; i < SIU_PORTS_MAX; i++) {
 134                 port.line = i;
 135                 port.type = type[i];
 136                 if (port.type == PORT_UNKNOWN)
 137                         break;
 138                 port.mapbase = res[i].start;
 139                 port.membase = (unsigned char __iomem *)KSEG1ADDR(res[i].start);
 140                 vr41xx_siu_early_setup(&port);
 141         }
 142 }