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