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);
141
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