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1 | /* | |
2 | * net/dsa/mv88e6352.c - Marvell 88e6352 switch chip support | |
3 | * | |
4 | * Copyright (c) 2014 Guenter Roeck | |
5 | * | |
6 | * Derived from mv88e6123_61_65.c | |
7 | * Copyright (c) 2008-2009 Marvell Semiconductor | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | */ | |
14 | ||
15 | #include <linux/delay.h> | |
16 | #include <linux/jiffies.h> | |
17 | #include <linux/list.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/phy.h> | |
22 | #include <net/dsa.h> | |
23 | #include "mv88e6xxx.h" | |
24 | ||
25 | static const struct mv88e6xxx_switch_id mv88e6352_table[] = { | |
26 | { PORT_SWITCH_ID_6172, "Marvell 88E6172" }, | |
27 | { PORT_SWITCH_ID_6176, "Marvell 88E6176" }, | |
28 | { PORT_SWITCH_ID_6320, "Marvell 88E6320" }, | |
29 | { PORT_SWITCH_ID_6320_A1, "Marvell 88E6320 (A1)" }, | |
30 | { PORT_SWITCH_ID_6320_A2, "Marvell 88e6320 (A2)" }, | |
31 | { PORT_SWITCH_ID_6321, "Marvell 88E6321" }, | |
32 | { PORT_SWITCH_ID_6321_A1, "Marvell 88E6321 (A1)" }, | |
33 | { PORT_SWITCH_ID_6321_A2, "Marvell 88e6321 (A2)" }, | |
34 | { PORT_SWITCH_ID_6352, "Marvell 88E6352" }, | |
35 | { PORT_SWITCH_ID_6352_A0, "Marvell 88E6352 (A0)" }, | |
36 | { PORT_SWITCH_ID_6352_A1, "Marvell 88E6352 (A1)" }, | |
37 | }; | |
38 | ||
39 | static char *mv88e6352_probe(struct device *host_dev, int sw_addr) | |
40 | { | |
41 | return mv88e6xxx_lookup_name(host_dev, sw_addr, mv88e6352_table, | |
42 | ARRAY_SIZE(mv88e6352_table)); | |
43 | } | |
44 | ||
45 | static int mv88e6352_setup_global(struct dsa_switch *ds) | |
46 | { | |
47 | u32 upstream_port = dsa_upstream_port(ds); | |
48 | int ret; | |
49 | u32 reg; | |
50 | ||
51 | ret = mv88e6xxx_setup_global(ds); | |
52 | if (ret) | |
53 | return ret; | |
54 | ||
55 | /* Discard packets with excessive collisions, | |
56 | * mask all interrupt sources, enable PPU (bit 14, undocumented). | |
57 | */ | |
58 | REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, | |
59 | GLOBAL_CONTROL_PPU_ENABLE | GLOBAL_CONTROL_DISCARD_EXCESS); | |
60 | ||
61 | /* Configure the upstream port, and configure the upstream | |
62 | * port as the port to which ingress and egress monitor frames | |
63 | * are to be sent. | |
64 | */ | |
65 | reg = upstream_port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT | | |
66 | upstream_port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT | | |
67 | upstream_port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT; | |
68 | REG_WRITE(REG_GLOBAL, GLOBAL_MONITOR_CONTROL, reg); | |
69 | ||
70 | /* Disable remote management for now, and set the switch's | |
71 | * DSA device number. | |
72 | */ | |
73 | REG_WRITE(REG_GLOBAL, 0x1c, ds->index & 0x1f); | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | static int mv88e6352_setup(struct dsa_switch *ds) | |
79 | { | |
80 | struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); | |
81 | int ret; | |
82 | ||
83 | ret = mv88e6xxx_setup_common(ds); | |
84 | if (ret < 0) | |
85 | return ret; | |
86 | ||
87 | ps->num_ports = 7; | |
88 | ||
89 | mutex_init(&ps->eeprom_mutex); | |
90 | ||
91 | ret = mv88e6xxx_switch_reset(ds, true); | |
92 | if (ret < 0) | |
93 | return ret; | |
94 | ||
95 | ret = mv88e6352_setup_global(ds); | |
96 | if (ret < 0) | |
97 | return ret; | |
98 | ||
99 | return mv88e6xxx_setup_ports(ds); | |
100 | } | |
101 | ||
102 | static int mv88e6352_read_eeprom_word(struct dsa_switch *ds, int addr) | |
103 | { | |
104 | struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); | |
105 | int ret; | |
106 | ||
107 | mutex_lock(&ps->eeprom_mutex); | |
108 | ||
109 | ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP, | |
110 | GLOBAL2_EEPROM_OP_READ | | |
111 | (addr & GLOBAL2_EEPROM_OP_ADDR_MASK)); | |
112 | if (ret < 0) | |
113 | goto error; | |
114 | ||
115 | ret = mv88e6xxx_eeprom_busy_wait(ds); | |
116 | if (ret < 0) | |
117 | goto error; | |
118 | ||
119 | ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA); | |
120 | error: | |
121 | mutex_unlock(&ps->eeprom_mutex); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | static int mv88e6352_get_eeprom(struct dsa_switch *ds, | |
126 | struct ethtool_eeprom *eeprom, u8 *data) | |
127 | { | |
128 | int offset; | |
129 | int len; | |
130 | int ret; | |
131 | ||
132 | offset = eeprom->offset; | |
133 | len = eeprom->len; | |
134 | eeprom->len = 0; | |
135 | ||
136 | eeprom->magic = 0xc3ec4951; | |
137 | ||
138 | ret = mv88e6xxx_eeprom_load_wait(ds); | |
139 | if (ret < 0) | |
140 | return ret; | |
141 | ||
142 | if (offset & 1) { | |
143 | int word; | |
144 | ||
145 | word = mv88e6352_read_eeprom_word(ds, offset >> 1); | |
146 | if (word < 0) | |
147 | return word; | |
148 | ||
149 | *data++ = (word >> 8) & 0xff; | |
150 | ||
151 | offset++; | |
152 | len--; | |
153 | eeprom->len++; | |
154 | } | |
155 | ||
156 | while (len >= 2) { | |
157 | int word; | |
158 | ||
159 | word = mv88e6352_read_eeprom_word(ds, offset >> 1); | |
160 | if (word < 0) | |
161 | return word; | |
162 | ||
163 | *data++ = word & 0xff; | |
164 | *data++ = (word >> 8) & 0xff; | |
165 | ||
166 | offset += 2; | |
167 | len -= 2; | |
168 | eeprom->len += 2; | |
169 | } | |
170 | ||
171 | if (len) { | |
172 | int word; | |
173 | ||
174 | word = mv88e6352_read_eeprom_word(ds, offset >> 1); | |
175 | if (word < 0) | |
176 | return word; | |
177 | ||
178 | *data++ = word & 0xff; | |
179 | ||
180 | offset++; | |
181 | len--; | |
182 | eeprom->len++; | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static int mv88e6352_eeprom_is_readonly(struct dsa_switch *ds) | |
189 | { | |
190 | int ret; | |
191 | ||
192 | ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP); | |
193 | if (ret < 0) | |
194 | return ret; | |
195 | ||
196 | if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN)) | |
197 | return -EROFS; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int mv88e6352_write_eeprom_word(struct dsa_switch *ds, int addr, | |
203 | u16 data) | |
204 | { | |
205 | struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); | |
206 | int ret; | |
207 | ||
208 | mutex_lock(&ps->eeprom_mutex); | |
209 | ||
210 | ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data); | |
211 | if (ret < 0) | |
212 | goto error; | |
213 | ||
214 | ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP, | |
215 | GLOBAL2_EEPROM_OP_WRITE | | |
216 | (addr & GLOBAL2_EEPROM_OP_ADDR_MASK)); | |
217 | if (ret < 0) | |
218 | goto error; | |
219 | ||
220 | ret = mv88e6xxx_eeprom_busy_wait(ds); | |
221 | error: | |
222 | mutex_unlock(&ps->eeprom_mutex); | |
223 | return ret; | |
224 | } | |
225 | ||
226 | static int mv88e6352_set_eeprom(struct dsa_switch *ds, | |
227 | struct ethtool_eeprom *eeprom, u8 *data) | |
228 | { | |
229 | int offset; | |
230 | int ret; | |
231 | int len; | |
232 | ||
233 | if (eeprom->magic != 0xc3ec4951) | |
234 | return -EINVAL; | |
235 | ||
236 | ret = mv88e6352_eeprom_is_readonly(ds); | |
237 | if (ret) | |
238 | return ret; | |
239 | ||
240 | offset = eeprom->offset; | |
241 | len = eeprom->len; | |
242 | eeprom->len = 0; | |
243 | ||
244 | ret = mv88e6xxx_eeprom_load_wait(ds); | |
245 | if (ret < 0) | |
246 | return ret; | |
247 | ||
248 | if (offset & 1) { | |
249 | int word; | |
250 | ||
251 | word = mv88e6352_read_eeprom_word(ds, offset >> 1); | |
252 | if (word < 0) | |
253 | return word; | |
254 | ||
255 | word = (*data++ << 8) | (word & 0xff); | |
256 | ||
257 | ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word); | |
258 | if (ret < 0) | |
259 | return ret; | |
260 | ||
261 | offset++; | |
262 | len--; | |
263 | eeprom->len++; | |
264 | } | |
265 | ||
266 | while (len >= 2) { | |
267 | int word; | |
268 | ||
269 | word = *data++; | |
270 | word |= *data++ << 8; | |
271 | ||
272 | ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word); | |
273 | if (ret < 0) | |
274 | return ret; | |
275 | ||
276 | offset += 2; | |
277 | len -= 2; | |
278 | eeprom->len += 2; | |
279 | } | |
280 | ||
281 | if (len) { | |
282 | int word; | |
283 | ||
284 | word = mv88e6352_read_eeprom_word(ds, offset >> 1); | |
285 | if (word < 0) | |
286 | return word; | |
287 | ||
288 | word = (word & 0xff00) | *data++; | |
289 | ||
290 | ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word); | |
291 | if (ret < 0) | |
292 | return ret; | |
293 | ||
294 | offset++; | |
295 | len--; | |
296 | eeprom->len++; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | struct dsa_switch_driver mv88e6352_switch_driver = { | |
303 | .tag_protocol = DSA_TAG_PROTO_EDSA, | |
304 | .priv_size = sizeof(struct mv88e6xxx_priv_state), | |
305 | .probe = mv88e6352_probe, | |
306 | .setup = mv88e6352_setup, | |
307 | .set_addr = mv88e6xxx_set_addr_indirect, | |
308 | .phy_read = mv88e6xxx_phy_read_indirect, | |
309 | .phy_write = mv88e6xxx_phy_write_indirect, | |
310 | .get_strings = mv88e6xxx_get_strings, | |
311 | .get_ethtool_stats = mv88e6xxx_get_ethtool_stats, | |
312 | .get_sset_count = mv88e6xxx_get_sset_count, | |
313 | .adjust_link = mv88e6xxx_adjust_link, | |
314 | .set_eee = mv88e6xxx_set_eee, | |
315 | .get_eee = mv88e6xxx_get_eee, | |
316 | #ifdef CONFIG_NET_DSA_HWMON | |
317 | .get_temp = mv88e6xxx_get_temp, | |
318 | .get_temp_limit = mv88e6xxx_get_temp_limit, | |
319 | .set_temp_limit = mv88e6xxx_set_temp_limit, | |
320 | .get_temp_alarm = mv88e6xxx_get_temp_alarm, | |
321 | #endif | |
322 | .get_eeprom = mv88e6352_get_eeprom, | |
323 | .set_eeprom = mv88e6352_set_eeprom, | |
324 | .get_regs_len = mv88e6xxx_get_regs_len, | |
325 | .get_regs = mv88e6xxx_get_regs, | |
326 | .port_join_bridge = mv88e6xxx_port_bridge_join, | |
327 | .port_leave_bridge = mv88e6xxx_port_bridge_leave, | |
328 | .port_stp_update = mv88e6xxx_port_stp_update, | |
329 | .port_pvid_get = mv88e6xxx_port_pvid_get, | |
330 | .port_vlan_prepare = mv88e6xxx_port_vlan_prepare, | |
331 | .port_vlan_add = mv88e6xxx_port_vlan_add, | |
332 | .port_vlan_del = mv88e6xxx_port_vlan_del, | |
333 | .vlan_getnext = mv88e6xxx_vlan_getnext, | |
334 | .port_fdb_prepare = mv88e6xxx_port_fdb_prepare, | |
335 | .port_fdb_add = mv88e6xxx_port_fdb_add, | |
336 | .port_fdb_del = mv88e6xxx_port_fdb_del, | |
337 | .port_fdb_dump = mv88e6xxx_port_fdb_dump, | |
338 | }; | |
339 | ||
340 | MODULE_ALIAS("platform:mv88e6172"); | |
341 | MODULE_ALIAS("platform:mv88e6176"); | |
342 | MODULE_ALIAS("platform:mv88e6320"); | |
343 | MODULE_ALIAS("platform:mv88e6321"); | |
344 | MODULE_ALIAS("platform:mv88e6352"); |