arch/mips/sibyte/swarm/platform.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/err.h>
   3 #include <linux/kernel.h>
   4 #include <linux/init.h>
   5 #include <linux/io.h>
   6 #include <linux/platform_device.h>
   7 #include <linux/ata_platform.h>
   8
   9 #include <asm/sibyte/board.h>
  10 #include <asm/sibyte/sb1250_genbus.h>
  11 #include <asm/sibyte/sb1250_regs.h>
  12
  13 #if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)
  14
  15 #define DRV_NAME        "pata-swarm"
  16
  17 #define SWARM_IDE_SHIFT 5
  18 #define SWARM_IDE_BASE  0x1f0
  19 #define SWARM_IDE_CTRL  0x3f6
  20
  21 static struct resource swarm_pata_resource[] = {
  22         {
  23                 .name   = "Swarm GenBus IDE",
  24                 .flags  = IORESOURCE_MEM,
  25         }, {
  26                 .name   = "Swarm GenBus IDE",
  27                 .flags  = IORESOURCE_MEM,
  28         }, {
  29                 .name   = "Swarm GenBus IDE",
  30                 .flags  = IORESOURCE_IRQ,
  31                 .start  = K_INT_GB_IDE,
  32                 .end    = K_INT_GB_IDE,
  33         },
  34 };
  35
  36 static struct pata_platform_info pata_platform_data = {
  37         .ioport_shift   = SWARM_IDE_SHIFT,
  38 };
  39
  40 static struct platform_device swarm_pata_device = {
  41         .name           = "pata_platform",
  42         .id             = -1,
  43         .resource       = swarm_pata_resource,
  44         .num_resources  = ARRAY_SIZE(swarm_pata_resource),
  45         .dev  = {
  46                 .platform_data          = &pata_platform_data,
  47                 .coherent_dma_mask      = ~0,   /* grumble */
  48         },
  49 };
  50
  51 static int __init swarm_pata_init(void)
  52 {
  53         u8 __iomem *base;
  54         phys_addr_t offset, size;
  55         struct resource *r;
  56
  57         if (!SIBYTE_HAVE_IDE)
  58                 return -ENODEV;
  59
  60         base = ioremap(A_IO_EXT_BASE, 0x800);
  61         offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
  62         size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
  63         iounmap(base);
  64
  65         offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
  66         size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
  67         if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
  68                 pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");
  69
  70                 return -EBUSY;
  71         }
  72
  73         pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);
  74
  75         r = swarm_pata_resource;
  76         r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
  77         r[0].end   = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
  78         r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
  79         r[1].end   = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;
  80
  81         return platform_device_register(&swarm_pata_device);
  82 }
  83
  84 device_initcall(swarm_pata_init);
  85
  86 #endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */
  87
  88 #define sb1250_dev_struct(num) \
  89         static struct resource sb1250_res##num = {              \
  90                 .name = "SB1250 MAC " __stringify(num),         \
  91                 .flags = IORESOURCE_MEM,                \
  92                 .start = A_MAC_CHANNEL_BASE(num),       \
  93                 .end = A_MAC_CHANNEL_BASE(num + 1) -1,  \
  94         };\
  95         static struct platform_device sb1250_dev##num = {       \
  96                 .name = "sb1250-mac",                   \
  97         .id = num,                                      \
  98         .resource = &sb1250_res##num,                   \
  99         .num_resources = 1,                             \
 100         }
 101
 102 sb1250_dev_struct(0);
 103 sb1250_dev_struct(1);
 104 sb1250_dev_struct(2);
 105 sb1250_dev_struct(3);
 106
 107 static struct platform_device *sb1250_devs[] __initdata = {
 108         &sb1250_dev0,
 109         &sb1250_dev1,
 110         &sb1250_dev2,
 111         &sb1250_dev3,
 112 };
 113
 114 static int __init sb1250_device_init(void)
 115 {
 116         int ret;
 117
 118         /* Set the number of available units based on the SOC type.  */
 119         switch (soc_type) {
 120         case K_SYS_SOC_TYPE_BCM1250:
 121         case K_SYS_SOC_TYPE_BCM1250_ALT:
 122                 ret = platform_add_devices(sb1250_devs, 3);
 123                 break;
 124         case K_SYS_SOC_TYPE_BCM1120:
 125         case K_SYS_SOC_TYPE_BCM1125:
 126         case K_SYS_SOC_TYPE_BCM1125H:
 127         case K_SYS_SOC_TYPE_BCM1250_ALT2:       /* Hybrid */
 128                 ret = platform_add_devices(sb1250_devs, 2);
 129                 break;
 130         case K_SYS_SOC_TYPE_BCM1x55:
 131         case K_SYS_SOC_TYPE_BCM1x80:
 132                 ret = platform_add_devices(sb1250_devs, 4);
 133                 break;
 134         default:
 135                 ret = -ENODEV;
 136                 break;
 137         }
 138         return ret;
 139 }
 140 device_initcall(sb1250_device_init);