Commit | Line | Data |
---|---|---|
07590ff0 AB |
1 | /* |
2 | * RapidIO Tsi57x switch family support | |
3 | * | |
058f88d6 AB |
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 | * | |
07590ff0 AB |
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> | |
2ec3ba69 | 22 | #include <linux/module.h> |
07590ff0 AB |
23 | #include "../rio.h" |
24 | ||
25 | /* Global (broadcast) route registers */ | |
26 | #define SPBC_ROUTE_CFG_DESTID 0x10070 | |
27 | #define SPBC_ROUTE_CFG_PORT 0x10074 | |
28 | ||
29 | /* Per port route registers */ | |
30 | #define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n) | |
31 | #define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n) | |
32 | ||
e5cabeb3 | 33 | #define TSI578_SP_MODE(n) (0x11004 + n*0x100) |
7a88d628 | 34 | #define TSI578_SP_MODE_GLBL 0x10004 |
e5cabeb3 | 35 | #define TSI578_SP_MODE_PW_DIS 0x08000000 |
7a88d628 | 36 | #define TSI578_SP_MODE_LUT_512 0x01000000 |
e5cabeb3 AB |
37 | |
38 | #define TSI578_SP_CTL_INDEP(n) (0x13004 + n*0x100) | |
39 | #define TSI578_SP_LUT_PEINF(n) (0x13010 + n*0x100) | |
40 | #define TSI578_SP_CS_TX(n) (0x13014 + n*0x100) | |
41 | #define TSI578_SP_INT_STATUS(n) (0x13018 + n*0x100) | |
42 | ||
7a88d628 AB |
43 | #define TSI578_GLBL_ROUTE_BASE 0x10078 |
44 | ||
07590ff0 AB |
45 | static int |
46 | tsi57x_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
47 | u16 table, u16 route_destid, u8 route_port) | |
48 | { | |
49 | if (table == RIO_GLOBAL_TABLE) { | |
50 | rio_mport_write_config_32(mport, destid, hopcount, | |
51 | SPBC_ROUTE_CFG_DESTID, route_destid); | |
52 | rio_mport_write_config_32(mport, destid, hopcount, | |
53 | SPBC_ROUTE_CFG_PORT, route_port); | |
54 | } else { | |
55 | rio_mport_write_config_32(mport, destid, hopcount, | |
56 | SPP_ROUTE_CFG_DESTID(table), route_destid); | |
57 | rio_mport_write_config_32(mport, destid, hopcount, | |
58 | SPP_ROUTE_CFG_PORT(table), route_port); | |
59 | } | |
60 | ||
61 | udelay(10); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | static int | |
67 | tsi57x_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
68 | u16 table, u16 route_destid, u8 *route_port) | |
69 | { | |
70 | int ret = 0; | |
71 | u32 result; | |
72 | ||
73 | if (table == RIO_GLOBAL_TABLE) { | |
74 | /* Use local RT of the ingress port to avoid possible | |
75 | race condition */ | |
76 | rio_mport_read_config_32(mport, destid, hopcount, | |
77 | RIO_SWP_INFO_CAR, &result); | |
78 | table = (result & RIO_SWP_INFO_PORT_NUM_MASK); | |
79 | } | |
80 | ||
81 | rio_mport_write_config_32(mport, destid, hopcount, | |
82 | SPP_ROUTE_CFG_DESTID(table), route_destid); | |
83 | rio_mport_read_config_32(mport, destid, hopcount, | |
84 | SPP_ROUTE_CFG_PORT(table), &result); | |
85 | ||
86 | *route_port = (u8)result; | |
87 | if (*route_port > 15) | |
88 | ret = -1; | |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
93 | static int | |
94 | tsi57x_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
95 | u16 table) | |
96 | { | |
97 | u32 route_idx; | |
98 | u32 lut_size; | |
99 | ||
100 | lut_size = (mport->sys_size) ? 0x1ff : 0xff; | |
101 | ||
102 | if (table == RIO_GLOBAL_TABLE) { | |
103 | rio_mport_write_config_32(mport, destid, hopcount, | |
104 | SPBC_ROUTE_CFG_DESTID, 0x80000000); | |
105 | for (route_idx = 0; route_idx <= lut_size; route_idx++) | |
106 | rio_mport_write_config_32(mport, destid, hopcount, | |
107 | SPBC_ROUTE_CFG_PORT, | |
108 | RIO_INVALID_ROUTE); | |
109 | } else { | |
110 | rio_mport_write_config_32(mport, destid, hopcount, | |
111 | SPP_ROUTE_CFG_DESTID(table), 0x80000000); | |
112 | for (route_idx = 0; route_idx <= lut_size; route_idx++) | |
113 | rio_mport_write_config_32(mport, destid, hopcount, | |
114 | SPP_ROUTE_CFG_PORT(table) , RIO_INVALID_ROUTE); | |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
7a88d628 AB |
120 | static int |
121 | tsi57x_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount, | |
122 | u8 sw_domain) | |
123 | { | |
124 | u32 regval; | |
125 | ||
126 | /* | |
127 | * Switch domain configuration operates only at global level | |
128 | */ | |
129 | ||
130 | /* Turn off flat (LUT_512) mode */ | |
131 | rio_mport_read_config_32(mport, destid, hopcount, | |
132 | TSI578_SP_MODE_GLBL, ®val); | |
133 | rio_mport_write_config_32(mport, destid, hopcount, TSI578_SP_MODE_GLBL, | |
134 | regval & ~TSI578_SP_MODE_LUT_512); | |
135 | /* Set switch domain base */ | |
136 | rio_mport_write_config_32(mport, destid, hopcount, | |
137 | TSI578_GLBL_ROUTE_BASE, | |
138 | (u32)(sw_domain << 24)); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int | |
143 | tsi57x_get_domain(struct rio_mport *mport, u16 destid, u8 hopcount, | |
144 | u8 *sw_domain) | |
145 | { | |
146 | u32 regval; | |
147 | ||
148 | /* | |
149 | * Switch domain configuration operates only at global level | |
150 | */ | |
151 | rio_mport_read_config_32(mport, destid, hopcount, | |
152 | TSI578_GLBL_ROUTE_BASE, ®val); | |
153 | ||
154 | *sw_domain = (u8)(regval >> 24); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
e5cabeb3 AB |
159 | static int |
160 | tsi57x_em_init(struct rio_dev *rdev) | |
161 | { | |
e5cabeb3 AB |
162 | u32 regval; |
163 | int portnum; | |
164 | ||
a93192a5 | 165 | pr_debug("TSI578 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount); |
e5cabeb3 | 166 | |
2d4da0fc AB |
167 | for (portnum = 0; |
168 | portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) { | |
e5cabeb3 | 169 | /* Make sure that Port-Writes are enabled (for all ports) */ |
a93192a5 | 170 | rio_read_config_32(rdev, |
e5cabeb3 | 171 | TSI578_SP_MODE(portnum), ®val); |
a93192a5 | 172 | rio_write_config_32(rdev, |
e5cabeb3 AB |
173 | TSI578_SP_MODE(portnum), |
174 | regval & ~TSI578_SP_MODE_PW_DIS); | |
175 | ||
176 | /* Clear all pending interrupts */ | |
a93192a5 | 177 | rio_read_config_32(rdev, |
1ae842de | 178 | RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum), |
e5cabeb3 | 179 | ®val); |
a93192a5 | 180 | rio_write_config_32(rdev, |
1ae842de | 181 | RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum), |
e5cabeb3 AB |
182 | regval & 0x07120214); |
183 | ||
a93192a5 | 184 | rio_read_config_32(rdev, |
e5cabeb3 | 185 | TSI578_SP_INT_STATUS(portnum), ®val); |
a93192a5 | 186 | rio_write_config_32(rdev, |
e5cabeb3 AB |
187 | TSI578_SP_INT_STATUS(portnum), |
188 | regval & 0x000700bd); | |
189 | ||
190 | /* Enable all interrupts to allow ports to send a port-write */ | |
a93192a5 | 191 | rio_read_config_32(rdev, |
e5cabeb3 | 192 | TSI578_SP_CTL_INDEP(portnum), ®val); |
a93192a5 | 193 | rio_write_config_32(rdev, |
e5cabeb3 AB |
194 | TSI578_SP_CTL_INDEP(portnum), |
195 | regval | 0x000b0000); | |
196 | ||
197 | /* Skip next (odd) port if the current port is in x4 mode */ | |
a93192a5 | 198 | rio_read_config_32(rdev, |
1ae842de | 199 | RIO_DEV_PORT_N_CTL_CSR(rdev, portnum), |
e5cabeb3 AB |
200 | ®val); |
201 | if ((regval & RIO_PORT_N_CTL_PWIDTH) == RIO_PORT_N_CTL_PWIDTH_4) | |
202 | portnum++; | |
203 | } | |
204 | ||
dd5648c9 | 205 | /* set TVAL = ~50us */ |
a93192a5 | 206 | rio_write_config_32(rdev, |
dd5648c9 AB |
207 | rdev->phys_efptr + RIO_PORT_LINKTO_CTL_CSR, 0x9a << 8); |
208 | ||
e5cabeb3 AB |
209 | return 0; |
210 | } | |
211 | ||
212 | static int | |
213 | tsi57x_em_handler(struct rio_dev *rdev, u8 portnum) | |
214 | { | |
215 | struct rio_mport *mport = rdev->net->hport; | |
e5cabeb3 AB |
216 | u32 intstat, err_status; |
217 | int sendcount, checkcount; | |
218 | u8 route_port; | |
219 | u32 regval; | |
220 | ||
a93192a5 | 221 | rio_read_config_32(rdev, |
1ae842de | 222 | RIO_DEV_PORT_N_ERR_STS_CSR(rdev, portnum), |
e5cabeb3 AB |
223 | &err_status); |
224 | ||
225 | if ((err_status & RIO_PORT_N_ERR_STS_PORT_OK) && | |
1ae842de AB |
226 | (err_status & (RIO_PORT_N_ERR_STS_OUT_ES | |
227 | RIO_PORT_N_ERR_STS_INP_ES))) { | |
e5cabeb3 | 228 | /* Remove any queued packets by locking/unlocking port */ |
a93192a5 | 229 | rio_read_config_32(rdev, |
1ae842de | 230 | RIO_DEV_PORT_N_CTL_CSR(rdev, portnum), |
e5cabeb3 AB |
231 | ®val); |
232 | if (!(regval & RIO_PORT_N_CTL_LOCKOUT)) { | |
a93192a5 | 233 | rio_write_config_32(rdev, |
1ae842de | 234 | RIO_DEV_PORT_N_CTL_CSR(rdev, portnum), |
e5cabeb3 AB |
235 | regval | RIO_PORT_N_CTL_LOCKOUT); |
236 | udelay(50); | |
a93192a5 | 237 | rio_write_config_32(rdev, |
1ae842de | 238 | RIO_DEV_PORT_N_CTL_CSR(rdev, portnum), |
e5cabeb3 AB |
239 | regval); |
240 | } | |
241 | ||
242 | /* Read from link maintenance response register to clear | |
243 | * valid bit | |
244 | */ | |
a93192a5 | 245 | rio_read_config_32(rdev, |
1ae842de | 246 | RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, portnum), |
e5cabeb3 AB |
247 | ®val); |
248 | ||
249 | /* Send a Packet-Not-Accepted/Link-Request-Input-Status control | |
250 | * symbol to recover from IES/OES | |
251 | */ | |
252 | sendcount = 3; | |
253 | while (sendcount) { | |
a93192a5 | 254 | rio_write_config_32(rdev, |
e5cabeb3 AB |
255 | TSI578_SP_CS_TX(portnum), 0x40fc8000); |
256 | checkcount = 3; | |
257 | while (checkcount--) { | |
258 | udelay(50); | |
a93192a5 | 259 | rio_read_config_32(rdev, |
1ae842de AB |
260 | RIO_DEV_PORT_N_MNT_RSP_CSR(rdev, |
261 | portnum), | |
e5cabeb3 AB |
262 | ®val); |
263 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) | |
264 | goto exit_es; | |
265 | } | |
266 | ||
267 | sendcount--; | |
268 | } | |
269 | } | |
270 | ||
271 | exit_es: | |
272 | /* Clear implementation specific error status bits */ | |
a93192a5 | 273 | rio_read_config_32(rdev, TSI578_SP_INT_STATUS(portnum), &intstat); |
e5cabeb3 | 274 | pr_debug("TSI578[%x:%x] SP%d_INT_STATUS=0x%08x\n", |
a93192a5 | 275 | rdev->destid, rdev->hopcount, portnum, intstat); |
e5cabeb3 AB |
276 | |
277 | if (intstat & 0x10000) { | |
a93192a5 | 278 | rio_read_config_32(rdev, |
e5cabeb3 AB |
279 | TSI578_SP_LUT_PEINF(portnum), ®val); |
280 | regval = (mport->sys_size) ? (regval >> 16) : (regval >> 24); | |
281 | route_port = rdev->rswitch->route_table[regval]; | |
282 | pr_debug("RIO: TSI578[%s] P%d LUT Parity Error (destID=%d)\n", | |
283 | rio_name(rdev), portnum, regval); | |
a93192a5 | 284 | tsi57x_route_add_entry(mport, rdev->destid, rdev->hopcount, |
e5cabeb3 AB |
285 | RIO_GLOBAL_TABLE, regval, route_port); |
286 | } | |
287 | ||
a93192a5 AB |
288 | rio_write_config_32(rdev, TSI578_SP_INT_STATUS(portnum), |
289 | intstat & 0x000700bd); | |
e5cabeb3 AB |
290 | |
291 | return 0; | |
292 | } | |
293 | ||
2ec3ba69 AB |
294 | static struct rio_switch_ops tsi57x_switch_ops = { |
295 | .owner = THIS_MODULE, | |
296 | .add_entry = tsi57x_route_add_entry, | |
297 | .get_entry = tsi57x_route_get_entry, | |
298 | .clr_table = tsi57x_route_clr_table, | |
299 | .set_domain = tsi57x_set_domain, | |
300 | .get_domain = tsi57x_get_domain, | |
301 | .em_init = tsi57x_em_init, | |
302 | .em_handle = tsi57x_em_handler, | |
303 | }; | |
304 | ||
305 | static int tsi57x_probe(struct rio_dev *rdev, const struct rio_device_id *id) | |
058f88d6 AB |
306 | { |
307 | pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev)); | |
2ec3ba69 AB |
308 | |
309 | spin_lock(&rdev->rswitch->lock); | |
310 | ||
311 | if (rdev->rswitch->ops) { | |
312 | spin_unlock(&rdev->rswitch->lock); | |
313 | return -EINVAL; | |
314 | } | |
315 | rdev->rswitch->ops = &tsi57x_switch_ops; | |
316 | ||
317 | if (rdev->do_enum) { | |
0bf2461f AB |
318 | /* Ensure that default routing is disabled on startup */ |
319 | rio_write_config_32(rdev, RIO_STD_RTE_DEFAULT_PORT, | |
320 | RIO_INVALID_ROUTE); | |
321 | } | |
322 | ||
2ec3ba69 | 323 | spin_unlock(&rdev->rswitch->lock); |
058f88d6 AB |
324 | return 0; |
325 | } | |
326 | ||
2ec3ba69 AB |
327 | static void tsi57x_remove(struct rio_dev *rdev) |
328 | { | |
329 | pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev)); | |
330 | spin_lock(&rdev->rswitch->lock); | |
331 | if (rdev->rswitch->ops != &tsi57x_switch_ops) { | |
332 | spin_unlock(&rdev->rswitch->lock); | |
333 | return; | |
334 | } | |
335 | rdev->rswitch->ops = NULL; | |
336 | spin_unlock(&rdev->rswitch->lock); | |
337 | } | |
338 | ||
c1b1418a | 339 | static const struct rio_device_id tsi57x_id_table[] = { |
2ec3ba69 AB |
340 | {RIO_DEVICE(RIO_DID_TSI572, RIO_VID_TUNDRA)}, |
341 | {RIO_DEVICE(RIO_DID_TSI574, RIO_VID_TUNDRA)}, | |
342 | {RIO_DEVICE(RIO_DID_TSI577, RIO_VID_TUNDRA)}, | |
343 | {RIO_DEVICE(RIO_DID_TSI578, RIO_VID_TUNDRA)}, | |
344 | { 0, } /* terminate list */ | |
345 | }; | |
346 | ||
347 | static struct rio_driver tsi57x_driver = { | |
348 | .name = "tsi57x", | |
349 | .id_table = tsi57x_id_table, | |
350 | .probe = tsi57x_probe, | |
351 | .remove = tsi57x_remove, | |
352 | }; | |
353 | ||
354 | static int __init tsi57x_init(void) | |
355 | { | |
356 | return rio_register_driver(&tsi57x_driver); | |
357 | } | |
358 | ||
359 | static void __exit tsi57x_exit(void) | |
360 | { | |
361 | rio_unregister_driver(&tsi57x_driver); | |
362 | } | |
363 | ||
364 | device_initcall(tsi57x_init); | |
365 | module_exit(tsi57x_exit); | |
366 | ||
367 | MODULE_DESCRIPTION("IDT Tsi57x Serial RapidIO switch family driver"); | |
368 | MODULE_AUTHOR("Integrated Device Technology, Inc."); | |
369 | MODULE_LICENSE("GPL"); |