Commit | Line | Data |
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406a4362 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
2e16a77e LB |
2 | /* |
3 | * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips | |
e84665c9 | 4 | * Copyright (c) 2008-2009 Marvell Semiconductor |
2e16a77e LB |
5 | */ |
6 | ||
19b2f97e | 7 | #include <linux/delay.h> |
56c3ff9b | 8 | #include <linux/etherdevice.h> |
19b2f97e | 9 | #include <linux/jiffies.h> |
2e16a77e | 10 | #include <linux/list.h> |
2bbba277 | 11 | #include <linux/module.h> |
2e16a77e LB |
12 | #include <linux/netdevice.h> |
13 | #include <linux/phy.h> | |
c8f0b869 | 14 | #include <net/dsa.h> |
6a4b2980 | 15 | #include "mv88e6060.h" |
2e16a77e | 16 | |
3e8bc1b8 | 17 | static int reg_read(struct mv88e6060_priv *priv, int addr, int reg) |
2e16a77e | 18 | { |
a77d43f1 | 19 | return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg); |
2e16a77e LB |
20 | } |
21 | ||
3e8bc1b8 | 22 | static int reg_write(struct mv88e6060_priv *priv, int addr, int reg, u16 val) |
2e16a77e | 23 | { |
a77d43f1 | 24 | return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val); |
2e16a77e LB |
25 | } |
26 | ||
0209d144 | 27 | static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr) |
2e16a77e LB |
28 | { |
29 | int ret; | |
30 | ||
6a4b2980 | 31 | ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID); |
2e16a77e | 32 | if (ret >= 0) { |
6a4b2980 | 33 | if (ret == PORT_SWITCH_ID_6060) |
3de6aa4c | 34 | return "Marvell 88E6060 (A0)"; |
6a4b2980 NA |
35 | if (ret == PORT_SWITCH_ID_6060_R1 || |
36 | ret == PORT_SWITCH_ID_6060_R2) | |
3de6aa4c | 37 | return "Marvell 88E6060 (B0)"; |
6a4b2980 | 38 | if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060) |
2e16a77e LB |
39 | return "Marvell 88E6060"; |
40 | } | |
41 | ||
42 | return NULL; | |
43 | } | |
44 | ||
5ed4e3eb FF |
45 | static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds, |
46 | int port) | |
7b314362 AL |
47 | { |
48 | return DSA_TAG_PROTO_TRAILER; | |
49 | } | |
50 | ||
3e8bc1b8 | 51 | static int mv88e6060_switch_reset(struct mv88e6060_priv *priv) |
2e16a77e LB |
52 | { |
53 | int i; | |
54 | int ret; | |
19b2f97e | 55 | unsigned long timeout; |
2e16a77e | 56 | |
3675c8d7 | 57 | /* Set all ports to the disabled state. */ |
6a4b2980 | 58 | for (i = 0; i < MV88E6060_PORTS; i++) { |
1ba22bf5 AL |
59 | ret = reg_read(priv, REG_PORT(i), PORT_CONTROL); |
60 | if (ret < 0) | |
61 | return ret; | |
c4362c37 AL |
62 | ret = reg_write(priv, REG_PORT(i), PORT_CONTROL, |
63 | ret & ~PORT_CONTROL_STATE_MASK); | |
64 | if (ret) | |
65 | return ret; | |
2e16a77e LB |
66 | } |
67 | ||
3675c8d7 | 68 | /* Wait for transmit queues to drain. */ |
19b2f97e | 69 | usleep_range(2000, 4000); |
2e16a77e | 70 | |
3675c8d7 | 71 | /* Reset the switch. */ |
c4362c37 AL |
72 | ret = reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL, |
73 | GLOBAL_ATU_CONTROL_SWRESET | | |
74 | GLOBAL_ATU_CONTROL_LEARNDIS); | |
75 | if (ret) | |
76 | return ret; | |
2e16a77e | 77 | |
3675c8d7 | 78 | /* Wait up to one second for reset to complete. */ |
19b2f97e BG |
79 | timeout = jiffies + 1 * HZ; |
80 | while (time_before(jiffies, timeout)) { | |
1ba22bf5 AL |
81 | ret = reg_read(priv, REG_GLOBAL, GLOBAL_STATUS); |
82 | if (ret < 0) | |
83 | return ret; | |
84 | ||
6a4b2980 | 85 | if (ret & GLOBAL_STATUS_INIT_READY) |
2e16a77e LB |
86 | break; |
87 | ||
19b2f97e | 88 | usleep_range(1000, 2000); |
2e16a77e | 89 | } |
19b2f97e | 90 | if (time_after(jiffies, timeout)) |
2e16a77e LB |
91 | return -ETIMEDOUT; |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
3e8bc1b8 | 96 | static int mv88e6060_setup_global(struct mv88e6060_priv *priv) |
2e16a77e | 97 | { |
c4362c37 AL |
98 | int ret; |
99 | ||
3675c8d7 | 100 | /* Disable discarding of frames with excessive collisions, |
2e16a77e LB |
101 | * set the maximum frame size to 1536 bytes, and mask all |
102 | * interrupt sources. | |
103 | */ | |
c4362c37 AL |
104 | ret = reg_write(priv, REG_GLOBAL, GLOBAL_CONTROL, |
105 | GLOBAL_CONTROL_MAX_FRAME_1536); | |
106 | if (ret) | |
107 | return ret; | |
2e16a77e | 108 | |
a7451560 | 109 | /* Disable automatic address learning. |
2e16a77e | 110 | */ |
c4362c37 AL |
111 | return reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL, |
112 | GLOBAL_ATU_CONTROL_LEARNDIS); | |
2e16a77e LB |
113 | } |
114 | ||
3e8bc1b8 | 115 | static int mv88e6060_setup_port(struct mv88e6060_priv *priv, int p) |
2e16a77e LB |
116 | { |
117 | int addr = REG_PORT(p); | |
c4362c37 | 118 | int ret; |
2e16a77e | 119 | |
3675c8d7 | 120 | /* Do not force flow control, disable Ingress and Egress |
2e16a77e LB |
121 | * Header tagging, disable VLAN tunneling, and set the port |
122 | * state to Forwarding. Additionally, if this is the CPU | |
123 | * port, enable Ingress and Egress Trailer tagging mode. | |
124 | */ | |
c4362c37 AL |
125 | ret = reg_write(priv, addr, PORT_CONTROL, |
126 | dsa_is_cpu_port(priv->ds, p) ? | |
6a4b2980 NA |
127 | PORT_CONTROL_TRAILER | |
128 | PORT_CONTROL_INGRESS_MODE | | |
129 | PORT_CONTROL_STATE_FORWARDING : | |
130 | PORT_CONTROL_STATE_FORWARDING); | |
c4362c37 AL |
131 | if (ret) |
132 | return ret; | |
2e16a77e | 133 | |
3675c8d7 | 134 | /* Port based VLAN map: give each port its own address |
2e16a77e LB |
135 | * database, allow the CPU port to talk to each of the 'real' |
136 | * ports, and allow each of the 'real' ports to only talk to | |
137 | * the CPU port. | |
138 | */ | |
c4362c37 AL |
139 | ret = reg_write(priv, addr, PORT_VLAN_MAP, |
140 | ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) | | |
141 | (dsa_is_cpu_port(priv->ds, p) ? | |
142 | dsa_user_ports(priv->ds) : | |
143 | BIT(dsa_to_port(priv->ds, p)->cpu_dp->index))); | |
144 | if (ret) | |
145 | return ret; | |
2e16a77e | 146 | |
3675c8d7 | 147 | /* Port Association Vector: when learning source addresses |
2e16a77e LB |
148 | * of packets, add the address to the address database using |
149 | * a port bitmap that has only the bit for this port set and | |
150 | * the other bits clear. | |
151 | */ | |
c4362c37 | 152 | return reg_write(priv, addr, PORT_ASSOC_VECTOR, BIT(p)); |
2e16a77e LB |
153 | } |
154 | ||
3e8bc1b8 | 155 | static int mv88e6060_setup_addr(struct mv88e6060_priv *priv) |
56c3ff9b VD |
156 | { |
157 | u8 addr[ETH_ALEN]; | |
c4362c37 | 158 | int ret; |
56c3ff9b VD |
159 | u16 val; |
160 | ||
161 | eth_random_addr(addr); | |
162 | ||
163 | val = addr[0] << 8 | addr[1]; | |
164 | ||
165 | /* The multicast bit is always transmitted as a zero, so the switch uses | |
166 | * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA. | |
167 | */ | |
168 | val &= 0xfeff; | |
169 | ||
c4362c37 AL |
170 | ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_01, val); |
171 | if (ret) | |
172 | return ret; | |
173 | ||
174 | ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_23, | |
175 | (addr[2] << 8) | addr[3]); | |
176 | if (ret) | |
177 | return ret; | |
56c3ff9b | 178 | |
c4362c37 AL |
179 | return reg_write(priv, REG_GLOBAL, GLOBAL_MAC_45, |
180 | (addr[4] << 8) | addr[5]); | |
56c3ff9b VD |
181 | } |
182 | ||
2e16a77e LB |
183 | static int mv88e6060_setup(struct dsa_switch *ds) |
184 | { | |
3e8bc1b8 | 185 | struct mv88e6060_priv *priv = ds->priv; |
2e16a77e | 186 | int ret; |
a77d43f1 | 187 | int i; |
2e16a77e | 188 | |
3e8bc1b8 AL |
189 | priv->ds = ds; |
190 | ||
191 | ret = mv88e6060_switch_reset(priv); | |
2e16a77e LB |
192 | if (ret < 0) |
193 | return ret; | |
194 | ||
195 | /* @@@ initialise atu */ | |
196 | ||
3e8bc1b8 | 197 | ret = mv88e6060_setup_global(priv); |
2e16a77e LB |
198 | if (ret < 0) |
199 | return ret; | |
200 | ||
3e8bc1b8 | 201 | ret = mv88e6060_setup_addr(priv); |
56c3ff9b VD |
202 | if (ret < 0) |
203 | return ret; | |
204 | ||
6a4b2980 | 205 | for (i = 0; i < MV88E6060_PORTS; i++) { |
3e8bc1b8 | 206 | ret = mv88e6060_setup_port(priv, i); |
2e16a77e LB |
207 | if (ret < 0) |
208 | return ret; | |
209 | } | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
2e16a77e LB |
214 | static int mv88e6060_port_to_phy_addr(int port) |
215 | { | |
6a4b2980 | 216 | if (port >= 0 && port < MV88E6060_PORTS) |
2e16a77e LB |
217 | return port; |
218 | return -1; | |
219 | } | |
220 | ||
221 | static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum) | |
222 | { | |
3e8bc1b8 | 223 | struct mv88e6060_priv *priv = ds->priv; |
2e16a77e LB |
224 | int addr; |
225 | ||
226 | addr = mv88e6060_port_to_phy_addr(port); | |
227 | if (addr == -1) | |
228 | return 0xffff; | |
229 | ||
3e8bc1b8 | 230 | return reg_read(priv, addr, regnum); |
2e16a77e LB |
231 | } |
232 | ||
233 | static int | |
234 | mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) | |
235 | { | |
3e8bc1b8 | 236 | struct mv88e6060_priv *priv = ds->priv; |
2e16a77e LB |
237 | int addr; |
238 | ||
239 | addr = mv88e6060_port_to_phy_addr(port); | |
240 | if (addr == -1) | |
241 | return 0xffff; | |
242 | ||
3e8bc1b8 | 243 | return reg_write(priv, addr, regnum, val); |
2e16a77e LB |
244 | } |
245 | ||
a82f67af | 246 | static const struct dsa_switch_ops mv88e6060_switch_ops = { |
7b314362 | 247 | .get_tag_protocol = mv88e6060_get_tag_protocol, |
2e16a77e | 248 | .setup = mv88e6060_setup, |
2e16a77e LB |
249 | .phy_read = mv88e6060_phy_read, |
250 | .phy_write = mv88e6060_phy_write, | |
2e16a77e LB |
251 | }; |
252 | ||
27761760 AL |
253 | static int mv88e6060_probe(struct mdio_device *mdiodev) |
254 | { | |
255 | struct device *dev = &mdiodev->dev; | |
256 | struct mv88e6060_priv *priv; | |
257 | struct dsa_switch *ds; | |
258 | const char *name; | |
259 | ||
260 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
261 | if (!priv) | |
262 | return -ENOMEM; | |
263 | ||
264 | priv->bus = mdiodev->bus; | |
265 | priv->sw_addr = mdiodev->addr; | |
266 | ||
267 | name = mv88e6060_get_name(priv->bus, priv->sw_addr); | |
268 | if (!name) | |
269 | return -ENODEV; | |
270 | ||
271 | dev_info(dev, "switch %s detected\n", name); | |
272 | ||
7e99e347 | 273 | ds = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL); |
27761760 AL |
274 | if (!ds) |
275 | return -ENOMEM; | |
276 | ||
7e99e347 VD |
277 | ds->dev = dev; |
278 | ds->num_ports = MV88E6060_PORTS; | |
27761760 AL |
279 | ds->priv = priv; |
280 | ds->dev = dev; | |
281 | ds->ops = &mv88e6060_switch_ops; | |
282 | ||
283 | dev_set_drvdata(dev, ds); | |
284 | ||
285 | return dsa_register_switch(ds); | |
286 | } | |
287 | ||
288 | static void mv88e6060_remove(struct mdio_device *mdiodev) | |
289 | { | |
290 | struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev); | |
291 | ||
292 | dsa_unregister_switch(ds); | |
293 | } | |
294 | ||
295 | static const struct of_device_id mv88e6060_of_match[] = { | |
296 | { | |
297 | .compatible = "marvell,mv88e6060", | |
298 | }, | |
299 | { /* sentinel */ }, | |
300 | }; | |
301 | ||
302 | static struct mdio_driver mv88e6060_driver = { | |
303 | .probe = mv88e6060_probe, | |
304 | .remove = mv88e6060_remove, | |
305 | .mdiodrv.driver = { | |
306 | .name = "mv88e6060", | |
307 | .of_match_table = mv88e6060_of_match, | |
308 | }, | |
309 | }; | |
310 | ||
2f8e7ece | 311 | mdio_module_driver(mv88e6060_driver); |
3d825ede BH |
312 | |
313 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); | |
314 | MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip"); | |
315 | MODULE_LICENSE("GPL"); | |
316 | MODULE_ALIAS("platform:mv88e6060"); |