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Linux/arch/mips/sibyte/swarm/platform.c

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

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