summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/rapidio/switches/tsi568.c
blob: 8a43561b9d17f7d4b9dc3f67f4c2e3e521b84e14 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
/*
 * RapidIO Tsi568 switch support
 *
 * Copyright 2009-2010 Integrated Device Technology, Inc.
 * Alexandre Bounine <alexandre.bounine@idt.com>
 *  - Added EM support
 *  - Modified switch operations initialization.
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <mporter@kernel.crashing.org>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/rio_ids.h>
#include <linux/delay.h>
#include <linux/module.h>
#include "../rio.h"

/* Global (broadcast) route registers */
#define SPBC_ROUTE_CFG_DESTID	0x10070
#define SPBC_ROUTE_CFG_PORT	0x10074

/* Per port route registers */
#define SPP_ROUTE_CFG_DESTID(n)	(0x11070 + 0x100*n)
#define SPP_ROUTE_CFG_PORT(n)	(0x11074 + 0x100*n)

#define TSI568_SP_MODE(n)	(0x11004 + 0x100*n)
#define  TSI568_SP_MODE_PW_DIS	0x08000000

static int
tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
		       u16 table, u16 route_destid, u8 route_port)
{
	if (table == RIO_GLOBAL_TABLE) {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_DESTID, route_destid);
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_PORT, route_port);
	} else {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_DESTID(table),
					route_destid);
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_PORT(table), route_port);
	}

	udelay(10);

	return 0;
}

static int
tsi568_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
		       u16 table, u16 route_destid, u8 *route_port)
{
	int ret = 0;
	u32 result;

	if (table == RIO_GLOBAL_TABLE) {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_DESTID, route_destid);
		rio_mport_read_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_PORT, &result);
	} else {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_DESTID(table),
					route_destid);
		rio_mport_read_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_PORT(table), &result);
	}

	*route_port = result;
	if (*route_port > 15)
		ret = -1;

	return ret;
}

static int
tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
		       u16 table)
{
	u32 route_idx;
	u32 lut_size;

	lut_size = (mport->sys_size) ? 0x1ff : 0xff;

	if (table == RIO_GLOBAL_TABLE) {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_DESTID, 0x80000000);
		for (route_idx = 0; route_idx <= lut_size; route_idx++)
			rio_mport_write_config_32(mport, destid, hopcount,
						SPBC_ROUTE_CFG_PORT,
						RIO_INVALID_ROUTE);
	} else {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_DESTID(table),
					0x80000000);
		for (route_idx = 0; route_idx <= lut_size; route_idx++)
			rio_mport_write_config_32(mport, destid, hopcount,
						SPP_ROUTE_CFG_PORT(table),
						RIO_INVALID_ROUTE);
	}

	return 0;
}

static int
tsi568_em_init(struct rio_dev *rdev)
{
	u32 regval;
	int portnum;

	pr_debug("TSI568 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);

	/* Make sure that Port-Writes are disabled (for all ports) */
	for (portnum = 0;
	     portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
		rio_read_config_32(rdev, TSI568_SP_MODE(portnum), &regval);
		rio_write_config_32(rdev, TSI568_SP_MODE(portnum),
				    regval | TSI568_SP_MODE_PW_DIS);
	}

	return 0;
}

static struct rio_switch_ops tsi568_switch_ops = {
	.owner = THIS_MODULE,
	.add_entry = tsi568_route_add_entry,
	.get_entry = tsi568_route_get_entry,
	.clr_table = tsi568_route_clr_table,
	.set_domain = NULL,
	.get_domain = NULL,
	.em_init = tsi568_em_init,
	.em_handle = NULL,
};

static int tsi568_probe(struct rio_dev *rdev, const struct rio_device_id *id)
{
	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));

	spin_lock(&rdev->rswitch->lock);

	if (rdev->rswitch->ops) {
		spin_unlock(&rdev->rswitch->lock);
		return -EINVAL;
	}

	rdev->rswitch->ops = &tsi568_switch_ops;
	spin_unlock(&rdev->rswitch->lock);
	return 0;
}

static void tsi568_remove(struct rio_dev *rdev)
{
	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
	spin_lock(&rdev->rswitch->lock);
	if (rdev->rswitch->ops != &tsi568_switch_ops) {
		spin_unlock(&rdev->rswitch->lock);
		return;
	}
	rdev->rswitch->ops = NULL;
	spin_unlock(&rdev->rswitch->lock);
}

static struct rio_device_id tsi568_id_table[] = {
	{RIO_DEVICE(RIO_DID_TSI568, RIO_VID_TUNDRA)},
	{ 0, }	/* terminate list */
};

static struct rio_driver tsi568_driver = {
	.name = "tsi568",
	.id_table = tsi568_id_table,
	.probe = tsi568_probe,
	.remove = tsi568_remove,
};

static int __init tsi568_init(void)
{
	return rio_register_driver(&tsi568_driver);
}

static void __exit tsi568_exit(void)
{
	rio_unregister_driver(&tsi568_driver);
}

device_initcall(tsi568_init);
module_exit(tsi568_exit);

MODULE_DESCRIPTION("IDT Tsi568 Serial RapidIO switch driver");
MODULE_AUTHOR("Integrated Device Technology, Inc.");
MODULE_LICENSE("GPL");