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1 | /* |
2 | * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips | |
3 | * Copyright (c) 2008 Marvell Semiconductor | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | */ | |
10 | ||
11 | #include <linux/list.h> | |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/phy.h> | |
14 | #include "dsa_priv.h" | |
15 | ||
16 | #define REG_PORT(p) (8 + (p)) | |
17 | #define REG_GLOBAL 0x0f | |
18 | ||
19 | static int reg_read(struct dsa_switch *ds, int addr, int reg) | |
20 | { | |
21 | return mdiobus_read(ds->master_mii_bus, addr, reg); | |
22 | } | |
23 | ||
24 | #define REG_READ(addr, reg) \ | |
25 | ({ \ | |
26 | int __ret; \ | |
27 | \ | |
28 | __ret = reg_read(ds, addr, reg); \ | |
29 | if (__ret < 0) \ | |
30 | return __ret; \ | |
31 | __ret; \ | |
32 | }) | |
33 | ||
34 | ||
35 | static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val) | |
36 | { | |
37 | return mdiobus_write(ds->master_mii_bus, addr, reg, val); | |
38 | } | |
39 | ||
40 | #define REG_WRITE(addr, reg, val) \ | |
41 | ({ \ | |
42 | int __ret; \ | |
43 | \ | |
44 | __ret = reg_write(ds, addr, reg, val); \ | |
45 | if (__ret < 0) \ | |
46 | return __ret; \ | |
47 | }) | |
48 | ||
49 | static char *mv88e6060_probe(struct mii_bus *bus, int sw_addr) | |
50 | { | |
51 | int ret; | |
52 | ||
53 | ret = mdiobus_read(bus, REG_PORT(0), 0x03); | |
54 | if (ret >= 0) { | |
55 | ret &= 0xfff0; | |
56 | if (ret == 0x0600) | |
57 | return "Marvell 88E6060"; | |
58 | } | |
59 | ||
60 | return NULL; | |
61 | } | |
62 | ||
63 | static int mv88e6060_switch_reset(struct dsa_switch *ds) | |
64 | { | |
65 | int i; | |
66 | int ret; | |
67 | ||
68 | /* | |
69 | * Set all ports to the disabled state. | |
70 | */ | |
71 | for (i = 0; i < 6; i++) { | |
72 | ret = REG_READ(REG_PORT(i), 0x04); | |
73 | REG_WRITE(REG_PORT(i), 0x04, ret & 0xfffc); | |
74 | } | |
75 | ||
76 | /* | |
77 | * Wait for transmit queues to drain. | |
78 | */ | |
79 | msleep(2); | |
80 | ||
81 | /* | |
82 | * Reset the switch. | |
83 | */ | |
84 | REG_WRITE(REG_GLOBAL, 0x0A, 0xa130); | |
85 | ||
86 | /* | |
87 | * Wait up to one second for reset to complete. | |
88 | */ | |
89 | for (i = 0; i < 1000; i++) { | |
90 | ret = REG_READ(REG_GLOBAL, 0x00); | |
91 | if ((ret & 0x8000) == 0x0000) | |
92 | break; | |
93 | ||
94 | msleep(1); | |
95 | } | |
96 | if (i == 1000) | |
97 | return -ETIMEDOUT; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static int mv88e6060_setup_global(struct dsa_switch *ds) | |
103 | { | |
104 | /* | |
105 | * Disable discarding of frames with excessive collisions, | |
106 | * set the maximum frame size to 1536 bytes, and mask all | |
107 | * interrupt sources. | |
108 | */ | |
109 | REG_WRITE(REG_GLOBAL, 0x04, 0x0800); | |
110 | ||
111 | /* | |
112 | * Enable automatic address learning, set the address | |
113 | * database size to 1024 entries, and set the default aging | |
114 | * time to 5 minutes. | |
115 | */ | |
116 | REG_WRITE(REG_GLOBAL, 0x0a, 0x2130); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int mv88e6060_setup_port(struct dsa_switch *ds, int p) | |
122 | { | |
123 | int addr = REG_PORT(p); | |
124 | ||
125 | /* | |
126 | * Do not force flow control, disable Ingress and Egress | |
127 | * Header tagging, disable VLAN tunneling, and set the port | |
128 | * state to Forwarding. Additionally, if this is the CPU | |
129 | * port, enable Ingress and Egress Trailer tagging mode. | |
130 | */ | |
131 | REG_WRITE(addr, 0x04, (p == ds->cpu_port) ? 0x4103 : 0x0003); | |
132 | ||
133 | /* | |
134 | * Port based VLAN map: give each port its own address | |
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 | */ | |
139 | REG_WRITE(addr, 0x06, | |
140 | ((p & 0xf) << 12) | | |
141 | ((p == ds->cpu_port) ? | |
142 | ds->valid_port_mask : | |
143 | (1 << ds->cpu_port))); | |
144 | ||
145 | /* | |
146 | * Port Association Vector: when learning source addresses | |
147 | * of packets, add the address to the address database using | |
148 | * a port bitmap that has only the bit for this port set and | |
149 | * the other bits clear. | |
150 | */ | |
151 | REG_WRITE(addr, 0x0b, 1 << p); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static int mv88e6060_setup(struct dsa_switch *ds) | |
157 | { | |
158 | int i; | |
159 | int ret; | |
160 | ||
161 | ret = mv88e6060_switch_reset(ds); | |
162 | if (ret < 0) | |
163 | return ret; | |
164 | ||
165 | /* @@@ initialise atu */ | |
166 | ||
167 | ret = mv88e6060_setup_global(ds); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | ||
171 | for (i = 0; i < 6; i++) { | |
172 | ret = mv88e6060_setup_port(ds, i); | |
173 | if (ret < 0) | |
174 | return ret; | |
175 | } | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static int mv88e6060_set_addr(struct dsa_switch *ds, u8 *addr) | |
181 | { | |
182 | REG_WRITE(REG_GLOBAL, 0x01, (addr[0] << 8) | addr[1]); | |
183 | REG_WRITE(REG_GLOBAL, 0x02, (addr[2] << 8) | addr[3]); | |
184 | REG_WRITE(REG_GLOBAL, 0x03, (addr[4] << 8) | addr[5]); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | static int mv88e6060_port_to_phy_addr(int port) | |
190 | { | |
191 | if (port >= 0 && port <= 5) | |
192 | return port; | |
193 | return -1; | |
194 | } | |
195 | ||
196 | static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum) | |
197 | { | |
198 | int addr; | |
199 | ||
200 | addr = mv88e6060_port_to_phy_addr(port); | |
201 | if (addr == -1) | |
202 | return 0xffff; | |
203 | ||
204 | return reg_read(ds, addr, regnum); | |
205 | } | |
206 | ||
207 | static int | |
208 | mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) | |
209 | { | |
210 | int addr; | |
211 | ||
212 | addr = mv88e6060_port_to_phy_addr(port); | |
213 | if (addr == -1) | |
214 | return 0xffff; | |
215 | ||
216 | return reg_write(ds, addr, regnum, val); | |
217 | } | |
218 | ||
219 | static void mv88e6060_poll_link(struct dsa_switch *ds) | |
220 | { | |
221 | int i; | |
222 | ||
223 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
224 | struct net_device *dev; | |
d3f644da | 225 | int uninitialized_var(port_status); |
2e16a77e LB |
226 | int link; |
227 | int speed; | |
228 | int duplex; | |
229 | int fc; | |
230 | ||
231 | dev = ds->ports[i]; | |
232 | if (dev == NULL) | |
233 | continue; | |
234 | ||
235 | link = 0; | |
236 | if (dev->flags & IFF_UP) { | |
237 | port_status = reg_read(ds, REG_PORT(i), 0x00); | |
238 | if (port_status < 0) | |
239 | continue; | |
240 | ||
241 | link = !!(port_status & 0x1000); | |
242 | } | |
243 | ||
244 | if (!link) { | |
245 | if (netif_carrier_ok(dev)) { | |
246 | printk(KERN_INFO "%s: link down\n", dev->name); | |
247 | netif_carrier_off(dev); | |
248 | } | |
249 | continue; | |
250 | } | |
251 | ||
252 | speed = (port_status & 0x0100) ? 100 : 10; | |
253 | duplex = (port_status & 0x0200) ? 1 : 0; | |
254 | fc = ((port_status & 0xc000) == 0xc000) ? 1 : 0; | |
255 | ||
256 | if (!netif_carrier_ok(dev)) { | |
257 | printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, " | |
258 | "flow control %sabled\n", dev->name, | |
259 | speed, duplex ? "full" : "half", | |
260 | fc ? "en" : "dis"); | |
261 | netif_carrier_on(dev); | |
262 | } | |
263 | } | |
264 | } | |
265 | ||
266 | static struct dsa_switch_driver mv88e6060_switch_driver = { | |
267 | .tag_protocol = htons(ETH_P_TRAILER), | |
268 | .probe = mv88e6060_probe, | |
269 | .setup = mv88e6060_setup, | |
270 | .set_addr = mv88e6060_set_addr, | |
271 | .phy_read = mv88e6060_phy_read, | |
272 | .phy_write = mv88e6060_phy_write, | |
273 | .poll_link = mv88e6060_poll_link, | |
274 | }; | |
275 | ||
5eaa65b2 | 276 | static int __init mv88e6060_init(void) |
2e16a77e LB |
277 | { |
278 | register_switch_driver(&mv88e6060_switch_driver); | |
279 | return 0; | |
280 | } | |
281 | module_init(mv88e6060_init); | |
282 | ||
5eaa65b2 | 283 | static void __exit mv88e6060_cleanup(void) |
2e16a77e LB |
284 | { |
285 | unregister_switch_driver(&mv88e6060_switch_driver); | |
286 | } | |
287 | module_exit(mv88e6060_cleanup); |