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2e16a77e LB |
1 | /* |
2 | * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips | |
e84665c9 | 3 | * Copyright (c) 2008-2009 Marvell Semiconductor |
2e16a77e LB |
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 | ||
19b2f97e BG |
11 | #include <linux/delay.h> |
12 | #include <linux/jiffies.h> | |
2e16a77e | 13 | #include <linux/list.h> |
2bbba277 | 14 | #include <linux/module.h> |
2e16a77e LB |
15 | #include <linux/netdevice.h> |
16 | #include <linux/phy.h> | |
c8f0b869 | 17 | #include <net/dsa.h> |
6a4b2980 | 18 | #include "mv88e6060.h" |
2e16a77e LB |
19 | |
20 | static int reg_read(struct dsa_switch *ds, int addr, int reg) | |
21 | { | |
04bed143 | 22 | struct mv88e6060_priv *priv = ds->priv; |
b184e497 | 23 | |
a77d43f1 | 24 | return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg); |
2e16a77e LB |
25 | } |
26 | ||
27 | #define REG_READ(addr, reg) \ | |
28 | ({ \ | |
29 | int __ret; \ | |
30 | \ | |
31 | __ret = reg_read(ds, addr, reg); \ | |
32 | if (__ret < 0) \ | |
33 | return __ret; \ | |
34 | __ret; \ | |
35 | }) | |
36 | ||
37 | ||
38 | static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val) | |
39 | { | |
04bed143 | 40 | struct mv88e6060_priv *priv = ds->priv; |
b184e497 | 41 | |
a77d43f1 | 42 | return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val); |
2e16a77e LB |
43 | } |
44 | ||
45 | #define REG_WRITE(addr, reg, val) \ | |
46 | ({ \ | |
47 | int __ret; \ | |
48 | \ | |
49 | __ret = reg_write(ds, addr, reg, val); \ | |
50 | if (__ret < 0) \ | |
51 | return __ret; \ | |
52 | }) | |
53 | ||
0209d144 | 54 | static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr) |
2e16a77e LB |
55 | { |
56 | int ret; | |
57 | ||
6a4b2980 | 58 | ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID); |
2e16a77e | 59 | if (ret >= 0) { |
6a4b2980 | 60 | if (ret == PORT_SWITCH_ID_6060) |
3de6aa4c | 61 | return "Marvell 88E6060 (A0)"; |
6a4b2980 NA |
62 | if (ret == PORT_SWITCH_ID_6060_R1 || |
63 | ret == PORT_SWITCH_ID_6060_R2) | |
3de6aa4c | 64 | return "Marvell 88E6060 (B0)"; |
6a4b2980 | 65 | if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060) |
2e16a77e LB |
66 | return "Marvell 88E6060"; |
67 | } | |
68 | ||
69 | return NULL; | |
70 | } | |
71 | ||
7b314362 AL |
72 | static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds) |
73 | { | |
74 | return DSA_TAG_PROTO_TRAILER; | |
75 | } | |
76 | ||
0209d144 VD |
77 | static const char *mv88e6060_drv_probe(struct device *dsa_dev, |
78 | struct device *host_dev, int sw_addr, | |
79 | void **_priv) | |
a77d43f1 AL |
80 | { |
81 | struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev); | |
82 | struct mv88e6060_priv *priv; | |
0209d144 | 83 | const char *name; |
a77d43f1 AL |
84 | |
85 | name = mv88e6060_get_name(bus, sw_addr); | |
86 | if (name) { | |
87 | priv = devm_kzalloc(dsa_dev, sizeof(*priv), GFP_KERNEL); | |
88 | if (!priv) | |
89 | return NULL; | |
90 | *_priv = priv; | |
91 | priv->bus = bus; | |
92 | priv->sw_addr = sw_addr; | |
93 | } | |
94 | ||
95 | return name; | |
96 | } | |
97 | ||
2e16a77e LB |
98 | static int mv88e6060_switch_reset(struct dsa_switch *ds) |
99 | { | |
100 | int i; | |
101 | int ret; | |
19b2f97e | 102 | unsigned long timeout; |
2e16a77e | 103 | |
3675c8d7 | 104 | /* Set all ports to the disabled state. */ |
6a4b2980 NA |
105 | for (i = 0; i < MV88E6060_PORTS; i++) { |
106 | ret = REG_READ(REG_PORT(i), PORT_CONTROL); | |
107 | REG_WRITE(REG_PORT(i), PORT_CONTROL, | |
108 | ret & ~PORT_CONTROL_STATE_MASK); | |
2e16a77e LB |
109 | } |
110 | ||
3675c8d7 | 111 | /* Wait for transmit queues to drain. */ |
19b2f97e | 112 | usleep_range(2000, 4000); |
2e16a77e | 113 | |
3675c8d7 | 114 | /* Reset the switch. */ |
6a4b2980 NA |
115 | REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL, |
116 | GLOBAL_ATU_CONTROL_SWRESET | | |
117 | GLOBAL_ATU_CONTROL_ATUSIZE_1024 | | |
118 | GLOBAL_ATU_CONTROL_ATE_AGE_5MIN); | |
2e16a77e | 119 | |
3675c8d7 | 120 | /* Wait up to one second for reset to complete. */ |
19b2f97e BG |
121 | timeout = jiffies + 1 * HZ; |
122 | while (time_before(jiffies, timeout)) { | |
6a4b2980 NA |
123 | ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS); |
124 | if (ret & GLOBAL_STATUS_INIT_READY) | |
2e16a77e LB |
125 | break; |
126 | ||
19b2f97e | 127 | usleep_range(1000, 2000); |
2e16a77e | 128 | } |
19b2f97e | 129 | if (time_after(jiffies, timeout)) |
2e16a77e LB |
130 | return -ETIMEDOUT; |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int mv88e6060_setup_global(struct dsa_switch *ds) | |
136 | { | |
3675c8d7 | 137 | /* Disable discarding of frames with excessive collisions, |
2e16a77e LB |
138 | * set the maximum frame size to 1536 bytes, and mask all |
139 | * interrupt sources. | |
140 | */ | |
6a4b2980 | 141 | REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536); |
2e16a77e | 142 | |
3675c8d7 | 143 | /* Enable automatic address learning, set the address |
2e16a77e LB |
144 | * database size to 1024 entries, and set the default aging |
145 | * time to 5 minutes. | |
146 | */ | |
6a4b2980 NA |
147 | REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL, |
148 | GLOBAL_ATU_CONTROL_ATUSIZE_1024 | | |
149 | GLOBAL_ATU_CONTROL_ATE_AGE_5MIN); | |
2e16a77e LB |
150 | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int mv88e6060_setup_port(struct dsa_switch *ds, int p) | |
155 | { | |
156 | int addr = REG_PORT(p); | |
157 | ||
3675c8d7 | 158 | /* Do not force flow control, disable Ingress and Egress |
2e16a77e LB |
159 | * Header tagging, disable VLAN tunneling, and set the port |
160 | * state to Forwarding. Additionally, if this is the CPU | |
161 | * port, enable Ingress and Egress Trailer tagging mode. | |
162 | */ | |
6a4b2980 NA |
163 | REG_WRITE(addr, PORT_CONTROL, |
164 | dsa_is_cpu_port(ds, p) ? | |
165 | PORT_CONTROL_TRAILER | | |
166 | PORT_CONTROL_INGRESS_MODE | | |
167 | PORT_CONTROL_STATE_FORWARDING : | |
168 | PORT_CONTROL_STATE_FORWARDING); | |
2e16a77e | 169 | |
3675c8d7 | 170 | /* Port based VLAN map: give each port its own address |
2e16a77e LB |
171 | * database, allow the CPU port to talk to each of the 'real' |
172 | * ports, and allow each of the 'real' ports to only talk to | |
173 | * the CPU port. | |
174 | */ | |
6a4b2980 NA |
175 | REG_WRITE(addr, PORT_VLAN_MAP, |
176 | ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) | | |
177 | (dsa_is_cpu_port(ds, p) ? | |
74c3e2a5 | 178 | ds->enabled_port_mask : |
6a4b2980 | 179 | BIT(ds->dst->cpu_port))); |
2e16a77e | 180 | |
3675c8d7 | 181 | /* Port Association Vector: when learning source addresses |
2e16a77e LB |
182 | * of packets, add the address to the address database using |
183 | * a port bitmap that has only the bit for this port set and | |
184 | * the other bits clear. | |
185 | */ | |
6a4b2980 | 186 | REG_WRITE(addr, PORT_ASSOC_VECTOR, BIT(p)); |
2e16a77e LB |
187 | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static int mv88e6060_setup(struct dsa_switch *ds) | |
192 | { | |
2e16a77e | 193 | int ret; |
a77d43f1 | 194 | int i; |
2e16a77e LB |
195 | |
196 | ret = mv88e6060_switch_reset(ds); | |
197 | if (ret < 0) | |
198 | return ret; | |
199 | ||
200 | /* @@@ initialise atu */ | |
201 | ||
202 | ret = mv88e6060_setup_global(ds); | |
203 | if (ret < 0) | |
204 | return ret; | |
205 | ||
6a4b2980 | 206 | for (i = 0; i < MV88E6060_PORTS; i++) { |
2e16a77e LB |
207 | ret = mv88e6060_setup_port(ds, i); |
208 | if (ret < 0) | |
209 | return ret; | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static int mv88e6060_set_addr(struct dsa_switch *ds, u8 *addr) | |
216 | { | |
83ea0f4c | 217 | /* Use the same MAC Address as FD Pause frames for all ports */ |
6a4b2980 NA |
218 | REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, (addr[0] << 9) | addr[1]); |
219 | REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]); | |
220 | REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]); | |
2e16a77e LB |
221 | |
222 | return 0; | |
223 | } | |
224 | ||
225 | static int mv88e6060_port_to_phy_addr(int port) | |
226 | { | |
6a4b2980 | 227 | if (port >= 0 && port < MV88E6060_PORTS) |
2e16a77e LB |
228 | return port; |
229 | return -1; | |
230 | } | |
231 | ||
232 | static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum) | |
233 | { | |
234 | int addr; | |
235 | ||
236 | addr = mv88e6060_port_to_phy_addr(port); | |
237 | if (addr == -1) | |
238 | return 0xffff; | |
239 | ||
240 | return reg_read(ds, addr, regnum); | |
241 | } | |
242 | ||
243 | static int | |
244 | mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) | |
245 | { | |
246 | int addr; | |
247 | ||
248 | addr = mv88e6060_port_to_phy_addr(port); | |
249 | if (addr == -1) | |
250 | return 0xffff; | |
251 | ||
252 | return reg_write(ds, addr, regnum, val); | |
253 | } | |
254 | ||
9d490b4e | 255 | static struct dsa_switch_ops mv88e6060_switch_ops = { |
7b314362 | 256 | .get_tag_protocol = mv88e6060_get_tag_protocol, |
e49bad31 | 257 | .probe = mv88e6060_drv_probe, |
2e16a77e LB |
258 | .setup = mv88e6060_setup, |
259 | .set_addr = mv88e6060_set_addr, | |
260 | .phy_read = mv88e6060_phy_read, | |
261 | .phy_write = mv88e6060_phy_write, | |
2e16a77e LB |
262 | }; |
263 | ||
5eaa65b2 | 264 | static int __init mv88e6060_init(void) |
2e16a77e | 265 | { |
9d490b4e | 266 | register_switch_driver(&mv88e6060_switch_ops); |
2e16a77e LB |
267 | return 0; |
268 | } | |
269 | module_init(mv88e6060_init); | |
270 | ||
5eaa65b2 | 271 | static void __exit mv88e6060_cleanup(void) |
2e16a77e | 272 | { |
9d490b4e | 273 | unregister_switch_driver(&mv88e6060_switch_ops); |
2e16a77e LB |
274 | } |
275 | module_exit(mv88e6060_cleanup); | |
3d825ede BH |
276 | |
277 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); | |
278 | MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip"); | |
279 | MODULE_LICENSE("GPL"); | |
280 | MODULE_ALIAS("platform:mv88e6060"); |