1 /*
2 * RapidIO Tsi568 switch support
3 *
4 * Copyright 2009-2010 Integrated Device Technology, Inc.
5 * Alexandre Bounine <alexandre.bounine@idt.com>
6 * - Added EM support
7 * - Modified switch operations initialization.
8 *
9 * Copyright 2005 MontaVista Software, Inc.
10 * Matt Porter <mporter@kernel.crashing.org>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17
18 #include <linux/rio.h>
19 #include <linux/rio_drv.h>
20 #include <linux/rio_ids.h>
21 #include <linux/delay.h>
22 #include "../rio.h"
23
24 /* Global (broadcast) route registers */
25 #define SPBC_ROUTE_CFG_DESTID 0x10070
26 #define SPBC_ROUTE_CFG_PORT 0x10074
27
28 /* Per port route registers */
29 #define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
30 #define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
31
32 #define TSI568_SP_MODE(n) (0x11004 + 0x100*n)
33 #define TSI568_SP_MODE_PW_DIS 0x08000000
34
35 static int
tsi568_route_add_entry(struct rio_mport * mport,u16 destid,u8 hopcount,u16 table,u16 route_destid,u8 route_port)36 tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
37 u16 table, u16 route_destid, u8 route_port)
38 {
39 if (table == RIO_GLOBAL_TABLE) {
40 rio_mport_write_config_32(mport, destid, hopcount,
41 SPBC_ROUTE_CFG_DESTID, route_destid);
42 rio_mport_write_config_32(mport, destid, hopcount,
43 SPBC_ROUTE_CFG_PORT, route_port);
44 } else {
45 rio_mport_write_config_32(mport, destid, hopcount,
46 SPP_ROUTE_CFG_DESTID(table),
47 route_destid);
48 rio_mport_write_config_32(mport, destid, hopcount,
49 SPP_ROUTE_CFG_PORT(table), route_port);
50 }
51
52 udelay(10);
53
54 return 0;
55 }
56
57 static int
tsi568_route_get_entry(struct rio_mport * mport,u16 destid,u8 hopcount,u16 table,u16 route_destid,u8 * route_port)58 tsi568_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
59 u16 table, u16 route_destid, u8 *route_port)
60 {
61 int ret = 0;
62 u32 result;
63
64 if (table == RIO_GLOBAL_TABLE) {
65 rio_mport_write_config_32(mport, destid, hopcount,
66 SPBC_ROUTE_CFG_DESTID, route_destid);
67 rio_mport_read_config_32(mport, destid, hopcount,
68 SPBC_ROUTE_CFG_PORT, &result);
69 } else {
70 rio_mport_write_config_32(mport, destid, hopcount,
71 SPP_ROUTE_CFG_DESTID(table),
72 route_destid);
73 rio_mport_read_config_32(mport, destid, hopcount,
74 SPP_ROUTE_CFG_PORT(table), &result);
75 }
76
77 *route_port = result;
78 if (*route_port > 15)
79 ret = -1;
80
81 return ret;
82 }
83
84 static int
tsi568_route_clr_table(struct rio_mport * mport,u16 destid,u8 hopcount,u16 table)85 tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
86 u16 table)
87 {
88 u32 route_idx;
89 u32 lut_size;
90
91 lut_size = (mport->sys_size) ? 0x1ff : 0xff;
92
93 if (table == RIO_GLOBAL_TABLE) {
94 rio_mport_write_config_32(mport, destid, hopcount,
95 SPBC_ROUTE_CFG_DESTID, 0x80000000);
96 for (route_idx = 0; route_idx <= lut_size; route_idx++)
97 rio_mport_write_config_32(mport, destid, hopcount,
98 SPBC_ROUTE_CFG_PORT,
99 RIO_INVALID_ROUTE);
100 } else {
101 rio_mport_write_config_32(mport, destid, hopcount,
102 SPP_ROUTE_CFG_DESTID(table),
103 0x80000000);
104 for (route_idx = 0; route_idx <= lut_size; route_idx++)
105 rio_mport_write_config_32(mport, destid, hopcount,
106 SPP_ROUTE_CFG_PORT(table),
107 RIO_INVALID_ROUTE);
108 }
109
110 return 0;
111 }
112
113 static int
tsi568_em_init(struct rio_dev * rdev)114 tsi568_em_init(struct rio_dev *rdev)
115 {
116 u32 regval;
117 int portnum;
118
119 pr_debug("TSI568 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);
120
121 /* Make sure that Port-Writes are disabled (for all ports) */
122 for (portnum = 0;
123 portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
124 rio_read_config_32(rdev, TSI568_SP_MODE(portnum), ®val);
125 rio_write_config_32(rdev, TSI568_SP_MODE(portnum),
126 regval | TSI568_SP_MODE_PW_DIS);
127 }
128
129 return 0;
130 }
131
tsi568_switch_init(struct rio_dev * rdev,int do_enum)132 static int tsi568_switch_init(struct rio_dev *rdev, int do_enum)
133 {
134 pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
135 rdev->rswitch->add_entry = tsi568_route_add_entry;
136 rdev->rswitch->get_entry = tsi568_route_get_entry;
137 rdev->rswitch->clr_table = tsi568_route_clr_table;
138 rdev->rswitch->set_domain = NULL;
139 rdev->rswitch->get_domain = NULL;
140 rdev->rswitch->em_init = tsi568_em_init;
141 rdev->rswitch->em_handle = NULL;
142
143 return 0;
144 }
145
146 DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI568, tsi568_switch_init);
147