1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * RapidIO Tsi568 switch support
4 *
5 * Copyright 2009-2010 Integrated Device Technology, Inc.
6 * Alexandre Bounine <alexandre.bounine@idt.com>
7 * - Added EM support
8 * - Modified switch operations initialization.
9 *
10 * Copyright 2005 MontaVista Software, Inc.
11 * Matt Porter <mporter@kernel.crashing.org>
12 */
13
14 #include <linux/rio.h>
15 #include <linux/rio_drv.h>
16 #include <linux/rio_ids.h>
17 #include <linux/delay.h>
18 #include <linux/module.h>
19 #include "../rio.h"
20
21 /* Global (broadcast) route registers */
22 #define SPBC_ROUTE_CFG_DESTID 0x10070
23 #define SPBC_ROUTE_CFG_PORT 0x10074
24
25 /* Per port route registers */
26 #define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
27 #define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
28
29 #define TSI568_SP_MODE(n) (0x11004 + 0x100*n)
30 #define TSI568_SP_MODE_PW_DIS 0x08000000
31
32 static int
tsi568_route_add_entry(struct rio_mport * mport,u16 destid,u8 hopcount,u16 table,u16 route_destid,u8 route_port)33 tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
34 u16 table, u16 route_destid, u8 route_port)
35 {
36 if (table == RIO_GLOBAL_TABLE) {
37 rio_mport_write_config_32(mport, destid, hopcount,
38 SPBC_ROUTE_CFG_DESTID, route_destid);
39 rio_mport_write_config_32(mport, destid, hopcount,
40 SPBC_ROUTE_CFG_PORT, route_port);
41 } else {
42 rio_mport_write_config_32(mport, destid, hopcount,
43 SPP_ROUTE_CFG_DESTID(table),
44 route_destid);
45 rio_mport_write_config_32(mport, destid, hopcount,
46 SPP_ROUTE_CFG_PORT(table), route_port);
47 }
48
49 udelay(10);
50
51 return 0;
52 }
53
54 static int
tsi568_route_get_entry(struct rio_mport * mport,u16 destid,u8 hopcount,u16 table,u16 route_destid,u8 * route_port)55 tsi568_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
56 u16 table, u16 route_destid, u8 *route_port)
57 {
58 int ret = 0;
59 u32 result;
60
61 if (table == RIO_GLOBAL_TABLE) {
62 rio_mport_write_config_32(mport, destid, hopcount,
63 SPBC_ROUTE_CFG_DESTID, route_destid);
64 rio_mport_read_config_32(mport, destid, hopcount,
65 SPBC_ROUTE_CFG_PORT, &result);
66 } else {
67 rio_mport_write_config_32(mport, destid, hopcount,
68 SPP_ROUTE_CFG_DESTID(table),
69 route_destid);
70 rio_mport_read_config_32(mport, destid, hopcount,
71 SPP_ROUTE_CFG_PORT(table), &result);
72 }
73
74 *route_port = result;
75 if (*route_port > 15)
76 ret = -1;
77
78 return ret;
79 }
80
81 static int
tsi568_route_clr_table(struct rio_mport * mport,u16 destid,u8 hopcount,u16 table)82 tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
83 u16 table)
84 {
85 u32 route_idx;
86 u32 lut_size;
87
88 lut_size = (mport->sys_size) ? 0x1ff : 0xff;
89
90 if (table == RIO_GLOBAL_TABLE) {
91 rio_mport_write_config_32(mport, destid, hopcount,
92 SPBC_ROUTE_CFG_DESTID, 0x80000000);
93 for (route_idx = 0; route_idx <= lut_size; route_idx++)
94 rio_mport_write_config_32(mport, destid, hopcount,
95 SPBC_ROUTE_CFG_PORT,
96 RIO_INVALID_ROUTE);
97 } else {
98 rio_mport_write_config_32(mport, destid, hopcount,
99 SPP_ROUTE_CFG_DESTID(table),
100 0x80000000);
101 for (route_idx = 0; route_idx <= lut_size; route_idx++)
102 rio_mport_write_config_32(mport, destid, hopcount,
103 SPP_ROUTE_CFG_PORT(table),
104 RIO_INVALID_ROUTE);
105 }
106
107 return 0;
108 }
109
110 static int
tsi568_em_init(struct rio_dev * rdev)111 tsi568_em_init(struct rio_dev *rdev)
112 {
113 u32 regval;
114 int portnum;
115
116 pr_debug("TSI568 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);
117
118 /* Make sure that Port-Writes are disabled (for all ports) */
119 for (portnum = 0;
120 portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
121 rio_read_config_32(rdev, TSI568_SP_MODE(portnum), ®val);
122 rio_write_config_32(rdev, TSI568_SP_MODE(portnum),
123 regval | TSI568_SP_MODE_PW_DIS);
124 }
125
126 return 0;
127 }
128
129 static struct rio_switch_ops tsi568_switch_ops = {
130 .owner = THIS_MODULE,
131 .add_entry = tsi568_route_add_entry,
132 .get_entry = tsi568_route_get_entry,
133 .clr_table = tsi568_route_clr_table,
134 .set_domain = NULL,
135 .get_domain = NULL,
136 .em_init = tsi568_em_init,
137 .em_handle = NULL,
138 };
139
tsi568_probe(struct rio_dev * rdev,const struct rio_device_id * id)140 static int tsi568_probe(struct rio_dev *rdev, const struct rio_device_id *id)
141 {
142 pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
143
144 spin_lock(&rdev->rswitch->lock);
145
146 if (rdev->rswitch->ops) {
147 spin_unlock(&rdev->rswitch->lock);
148 return -EINVAL;
149 }
150
151 rdev->rswitch->ops = &tsi568_switch_ops;
152 spin_unlock(&rdev->rswitch->lock);
153 return 0;
154 }
155
tsi568_remove(struct rio_dev * rdev)156 static void tsi568_remove(struct rio_dev *rdev)
157 {
158 pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
159 spin_lock(&rdev->rswitch->lock);
160 if (rdev->rswitch->ops != &tsi568_switch_ops) {
161 spin_unlock(&rdev->rswitch->lock);
162 return;
163 }
164 rdev->rswitch->ops = NULL;
165 spin_unlock(&rdev->rswitch->lock);
166 }
167
168 static const struct rio_device_id tsi568_id_table[] = {
169 {RIO_DEVICE(RIO_DID_TSI568, RIO_VID_TUNDRA)},
170 { 0, } /* terminate list */
171 };
172
173 static struct rio_driver tsi568_driver = {
174 .name = "tsi568",
175 .id_table = tsi568_id_table,
176 .probe = tsi568_probe,
177 .remove = tsi568_remove,
178 };
179
tsi568_init(void)180 static int __init tsi568_init(void)
181 {
182 return rio_register_driver(&tsi568_driver);
183 }
184
tsi568_exit(void)185 static void __exit tsi568_exit(void)
186 {
187 rio_unregister_driver(&tsi568_driver);
188 }
189
190 device_initcall(tsi568_init);
191 module_exit(tsi568_exit);
192
193 MODULE_DESCRIPTION("IDT Tsi568 Serial RapidIO switch driver");
194 MODULE_AUTHOR("Integrated Device Technology, Inc.");
195 MODULE_LICENSE("GPL");
196