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1/*
2 * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
3 * Copyright (c) 2008-2009 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/delay.h>
12#include <linux/etherdevice.h>
13#include <linux/jiffies.h>
14#include <linux/list.h>
15#include <linux/module.h>
16#include <linux/netdevice.h>
17#include <linux/phy.h>
18#include <net/dsa.h>
19#include "mv88e6060.h"
20
21static int reg_read(struct dsa_switch *ds, int addr, int reg)
22{
23 struct mv88e6060_priv *priv = ds->priv;
24
25 return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg);
26}
27
28#define REG_READ(addr, reg) \
29 ({ \
30 int __ret; \
31 \
32 __ret = reg_read(ds, addr, reg); \
33 if (__ret < 0) \
34 return __ret; \
35 __ret; \
36 })
37
38
39static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
40{
41 struct mv88e6060_priv *priv = ds->priv;
42
43 return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val);
44}
45
46#define REG_WRITE(addr, reg, val) \
47 ({ \
48 int __ret; \
49 \
50 __ret = reg_write(ds, addr, reg, val); \
51 if (__ret < 0) \
52 return __ret; \
53 })
54
55static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr)
56{
57 int ret;
58
59 ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID);
60 if (ret >= 0) {
61 if (ret == PORT_SWITCH_ID_6060)
62 return "Marvell 88E6060 (A0)";
63 if (ret == PORT_SWITCH_ID_6060_R1 ||
64 ret == PORT_SWITCH_ID_6060_R2)
65 return "Marvell 88E6060 (B0)";
66 if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060)
67 return "Marvell 88E6060";
68 }
69
70 return NULL;
71}
72
73static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds,
74 int port)
75{
76 return DSA_TAG_PROTO_TRAILER;
77}
78
79static const char *mv88e6060_drv_probe(struct device *dsa_dev,
80 struct device *host_dev, int sw_addr,
81 void **_priv)
82{
83 struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
84 struct mv88e6060_priv *priv;
85 const char *name;
86
87 name = mv88e6060_get_name(bus, sw_addr);
88 if (name) {
89 priv = devm_kzalloc(dsa_dev, sizeof(*priv), GFP_KERNEL);
90 if (!priv)
91 return NULL;
92 *_priv = priv;
93 priv->bus = bus;
94 priv->sw_addr = sw_addr;
95 }
96
97 return name;
98}
99
100static int mv88e6060_switch_reset(struct dsa_switch *ds)
101{
102 int i;
103 int ret;
104 unsigned long timeout;
105
106 /* Set all ports to the disabled state. */
107 for (i = 0; i < MV88E6060_PORTS; i++) {
108 ret = REG_READ(REG_PORT(i), PORT_CONTROL);
109 REG_WRITE(REG_PORT(i), PORT_CONTROL,
110 ret & ~PORT_CONTROL_STATE_MASK);
111 }
112
113 /* Wait for transmit queues to drain. */
114 usleep_range(2000, 4000);
115
116 /* Reset the switch. */
117 REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
118 GLOBAL_ATU_CONTROL_SWRESET |
119 GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
120 GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
121
122 /* Wait up to one second for reset to complete. */
123 timeout = jiffies + 1 * HZ;
124 while (time_before(jiffies, timeout)) {
125 ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS);
126 if (ret & GLOBAL_STATUS_INIT_READY)
127 break;
128
129 usleep_range(1000, 2000);
130 }
131 if (time_after(jiffies, timeout))
132 return -ETIMEDOUT;
133
134 return 0;
135}
136
137static int mv88e6060_setup_global(struct dsa_switch *ds)
138{
139 /* Disable discarding of frames with excessive collisions,
140 * set the maximum frame size to 1536 bytes, and mask all
141 * interrupt sources.
142 */
143 REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536);
144
145 /* Enable automatic address learning, set the address
146 * database size to 1024 entries, and set the default aging
147 * time to 5 minutes.
148 */
149 REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
150 GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
151 GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
152
153 return 0;
154}
155
156static int mv88e6060_setup_port(struct dsa_switch *ds, int p)
157{
158 int addr = REG_PORT(p);
159
160 /* Do not force flow control, disable Ingress and Egress
161 * Header tagging, disable VLAN tunneling, and set the port
162 * state to Forwarding. Additionally, if this is the CPU
163 * port, enable Ingress and Egress Trailer tagging mode.
164 */
165 REG_WRITE(addr, PORT_CONTROL,
166 dsa_is_cpu_port(ds, p) ?
167 PORT_CONTROL_TRAILER |
168 PORT_CONTROL_INGRESS_MODE |
169 PORT_CONTROL_STATE_FORWARDING :
170 PORT_CONTROL_STATE_FORWARDING);
171
172 /* Port based VLAN map: give each port its own address
173 * database, allow the CPU port to talk to each of the 'real'
174 * ports, and allow each of the 'real' ports to only talk to
175 * the CPU port.
176 */
177 REG_WRITE(addr, PORT_VLAN_MAP,
178 ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
179 (dsa_is_cpu_port(ds, p) ? dsa_user_ports(ds) :
180 BIT(dsa_to_port(ds, p)->cpu_dp->index)));
181
182 /* Port Association Vector: when learning source addresses
183 * of packets, add the address to the address database using
184 * a port bitmap that has only the bit for this port set and
185 * the other bits clear.
186 */
187 REG_WRITE(addr, PORT_ASSOC_VECTOR, BIT(p));
188
189 return 0;
190}
191
192static int mv88e6060_setup_addr(struct dsa_switch *ds)
193{
194 u8 addr[ETH_ALEN];
195 u16 val;
196
197 eth_random_addr(addr);
198
199 val = addr[0] << 8 | addr[1];
200
201 /* The multicast bit is always transmitted as a zero, so the switch uses
202 * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA.
203 */
204 val &= 0xfeff;
205
206 REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, val);
207 REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]);
208 REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]);
209
210 return 0;
211}
212
213static int mv88e6060_setup(struct dsa_switch *ds)
214{
215 int ret;
216 int i;
217
218 ret = mv88e6060_switch_reset(ds);
219 if (ret < 0)
220 return ret;
221
222 /* @@@ initialise atu */
223
224 ret = mv88e6060_setup_global(ds);
225 if (ret < 0)
226 return ret;
227
228 ret = mv88e6060_setup_addr(ds);
229 if (ret < 0)
230 return ret;
231
232 for (i = 0; i < MV88E6060_PORTS; i++) {
233 ret = mv88e6060_setup_port(ds, i);
234 if (ret < 0)
235 return ret;
236 }
237
238 return 0;
239}
240
241static int mv88e6060_port_to_phy_addr(int port)
242{
243 if (port >= 0 && port < MV88E6060_PORTS)
244 return port;
245 return -1;
246}
247
248static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum)
249{
250 int addr;
251
252 addr = mv88e6060_port_to_phy_addr(port);
253 if (addr == -1)
254 return 0xffff;
255
256 return reg_read(ds, addr, regnum);
257}
258
259static int
260mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
261{
262 int addr;
263
264 addr = mv88e6060_port_to_phy_addr(port);
265 if (addr == -1)
266 return 0xffff;
267
268 return reg_write(ds, addr, regnum, val);
269}
270
271static const struct dsa_switch_ops mv88e6060_switch_ops = {
272 .get_tag_protocol = mv88e6060_get_tag_protocol,
273 .probe = mv88e6060_drv_probe,
274 .setup = mv88e6060_setup,
275 .phy_read = mv88e6060_phy_read,
276 .phy_write = mv88e6060_phy_write,
277};
278
279static struct dsa_switch_driver mv88e6060_switch_drv = {
280 .ops = &mv88e6060_switch_ops,
281};
282
283static int __init mv88e6060_init(void)
284{
285 register_switch_driver(&mv88e6060_switch_drv);
286 return 0;
287}
288module_init(mv88e6060_init);
289
290static void __exit mv88e6060_cleanup(void)
291{
292 unregister_switch_driver(&mv88e6060_switch_drv);
293}
294module_exit(mv88e6060_cleanup);
295
296MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
297MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip");
298MODULE_LICENSE("GPL");
299MODULE_ALIAS("platform:mv88e6060");
1/*
2 * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
3 * Copyright (c) 2008-2009 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/delay.h>
12#include <linux/jiffies.h>
13#include <linux/list.h>
14#include <linux/module.h>
15#include <linux/netdevice.h>
16#include <linux/phy.h>
17#include <net/dsa.h>
18#include "mv88e6060.h"
19
20static int reg_read(struct dsa_switch *ds, int addr, int reg)
21{
22 struct mv88e6060_priv *priv = ds->priv;
23
24 return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg);
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
38static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
39{
40 struct mv88e6060_priv *priv = ds->priv;
41
42 return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val);
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
54static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr)
55{
56 int ret;
57
58 ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID);
59 if (ret >= 0) {
60 if (ret == PORT_SWITCH_ID_6060)
61 return "Marvell 88E6060 (A0)";
62 if (ret == PORT_SWITCH_ID_6060_R1 ||
63 ret == PORT_SWITCH_ID_6060_R2)
64 return "Marvell 88E6060 (B0)";
65 if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060)
66 return "Marvell 88E6060";
67 }
68
69 return NULL;
70}
71
72static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds)
73{
74 return DSA_TAG_PROTO_TRAILER;
75}
76
77static const char *mv88e6060_drv_probe(struct device *dsa_dev,
78 struct device *host_dev, int sw_addr,
79 void **_priv)
80{
81 struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
82 struct mv88e6060_priv *priv;
83 const char *name;
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
98static int mv88e6060_switch_reset(struct dsa_switch *ds)
99{
100 int i;
101 int ret;
102 unsigned long timeout;
103
104 /* Set all ports to the disabled state. */
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);
109 }
110
111 /* Wait for transmit queues to drain. */
112 usleep_range(2000, 4000);
113
114 /* Reset the switch. */
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);
119
120 /* Wait up to one second for reset to complete. */
121 timeout = jiffies + 1 * HZ;
122 while (time_before(jiffies, timeout)) {
123 ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS);
124 if (ret & GLOBAL_STATUS_INIT_READY)
125 break;
126
127 usleep_range(1000, 2000);
128 }
129 if (time_after(jiffies, timeout))
130 return -ETIMEDOUT;
131
132 return 0;
133}
134
135static int mv88e6060_setup_global(struct dsa_switch *ds)
136{
137 /* Disable discarding of frames with excessive collisions,
138 * set the maximum frame size to 1536 bytes, and mask all
139 * interrupt sources.
140 */
141 REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536);
142
143 /* Enable automatic address learning, set the address
144 * database size to 1024 entries, and set the default aging
145 * time to 5 minutes.
146 */
147 REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
148 GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
149 GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
150
151 return 0;
152}
153
154static int mv88e6060_setup_port(struct dsa_switch *ds, int p)
155{
156 int addr = REG_PORT(p);
157
158 /* Do not force flow control, disable Ingress and Egress
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 */
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);
169
170 /* Port based VLAN map: give each port its own address
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 */
175 REG_WRITE(addr, PORT_VLAN_MAP,
176 ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
177 (dsa_is_cpu_port(ds, p) ?
178 ds->enabled_port_mask :
179 BIT(ds->dst->cpu_port)));
180
181 /* Port Association Vector: when learning source addresses
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 */
186 REG_WRITE(addr, PORT_ASSOC_VECTOR, BIT(p));
187
188 return 0;
189}
190
191static int mv88e6060_setup(struct dsa_switch *ds)
192{
193 int ret;
194 int i;
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
206 for (i = 0; i < MV88E6060_PORTS; i++) {
207 ret = mv88e6060_setup_port(ds, i);
208 if (ret < 0)
209 return ret;
210 }
211
212 return 0;
213}
214
215static int mv88e6060_set_addr(struct dsa_switch *ds, u8 *addr)
216{
217 /* Use the same MAC Address as FD Pause frames for all ports */
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]);
221
222 return 0;
223}
224
225static int mv88e6060_port_to_phy_addr(int port)
226{
227 if (port >= 0 && port < MV88E6060_PORTS)
228 return port;
229 return -1;
230}
231
232static 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
243static int
244mv88e6060_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
255static struct dsa_switch_ops mv88e6060_switch_ops = {
256 .get_tag_protocol = mv88e6060_get_tag_protocol,
257 .probe = mv88e6060_drv_probe,
258 .setup = mv88e6060_setup,
259 .set_addr = mv88e6060_set_addr,
260 .phy_read = mv88e6060_phy_read,
261 .phy_write = mv88e6060_phy_write,
262};
263
264static int __init mv88e6060_init(void)
265{
266 register_switch_driver(&mv88e6060_switch_ops);
267 return 0;
268}
269module_init(mv88e6060_init);
270
271static void __exit mv88e6060_cleanup(void)
272{
273 unregister_switch_driver(&mv88e6060_switch_ops);
274}
275module_exit(mv88e6060_cleanup);
276
277MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
278MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip");
279MODULE_LICENSE("GPL");
280MODULE_ALIAS("platform:mv88e6060");