LXR linux/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
  21static 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
  36static struct pata_platform_info pata_platform_data = {
  37        .ioport_shift   = SWARM_IDE_SHIFT,
  38};
  39
  40static 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
  51static 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
  84device_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
 102sb1250_dev_struct(0);
 103sb1250_dev_struct(1);
 104sb1250_dev_struct(2);
 105sb1250_dev_struct(3);
 106
 107static struct platform_device *sb1250_devs[] __initdata = {
 108        &sb1250_dev0,
 109        &sb1250_dev1,
 110        &sb1250_dev2,
 111        &sb1250_dev3,
 112};
 113
 114static 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}
 140device_initcall(sb1250_device_init);
 141