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authorDavid S. Miller <davem@davemloft.net>2014-12-16 14:30:09 -0500
committerDavid S. Miller <davem@davemloft.net>2014-12-16 15:02:23 -0500
commit6539c44d08ac2eea693b6163135169b9c8c18bb1 (patch)
tree1c879b16a0d4fd5f8b064b7beaa1f9dad516ded6 /drivers/net/phy/fixed.c
parent772801ef7572f2b3e16bebceb707159ee3081ded (diff)
net: Allow FIXED_PHY to be modular.
Otherwise we get things like: warning: (NET_DSA_BCM_SF2 && BCMGENET && SYSTEMPORT) selects FIXED_PHY which has unmet direct dependencies (NETDEVICES && PHYLIB=y) In order to make this work we have to rename fixed.c to fixed_phy.c because the regulator drivers already have a module named "fixed.o". Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/fixed.c')
-rw-r--r--drivers/net/phy/fixed.c337
1 files changed, 0 insertions, 337 deletions
diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
deleted file mode 100644
index 3ad0e6e16c39..000000000000
--- a/drivers/net/phy/fixed.c
+++ /dev/null
@@ -1,337 +0,0 @@
1/*
2 * Fixed MDIO bus (MDIO bus emulation with fixed PHYs)
3 *
4 * Author: Vitaly Bordug <vbordug@ru.mvista.com>
5 * Anton Vorontsov <avorontsov@ru.mvista.com>
6 *
7 * Copyright (c) 2006-2007 MontaVista Software, Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/platform_device.h>
18#include <linux/list.h>
19#include <linux/mii.h>
20#include <linux/phy.h>
21#include <linux/phy_fixed.h>
22#include <linux/err.h>
23#include <linux/slab.h>
24#include <linux/of.h>
25
26#define MII_REGS_NUM 29
27
28struct fixed_mdio_bus {
29 int irqs[PHY_MAX_ADDR];
30 struct mii_bus *mii_bus;
31 struct list_head phys;
32};
33
34struct fixed_phy {
35 int addr;
36 u16 regs[MII_REGS_NUM];
37 struct phy_device *phydev;
38 struct fixed_phy_status status;
39 int (*link_update)(struct net_device *, struct fixed_phy_status *);
40 struct list_head node;
41};
42
43static struct platform_device *pdev;
44static struct fixed_mdio_bus platform_fmb = {
45 .phys = LIST_HEAD_INIT(platform_fmb.phys),
46};
47
48static int fixed_phy_update_regs(struct fixed_phy *fp)
49{
50 u16 bmsr = BMSR_ANEGCAPABLE;
51 u16 bmcr = 0;
52 u16 lpagb = 0;
53 u16 lpa = 0;
54
55 if (fp->status.duplex) {
56 bmcr |= BMCR_FULLDPLX;
57
58 switch (fp->status.speed) {
59 case 1000:
60 bmsr |= BMSR_ESTATEN;
61 bmcr |= BMCR_SPEED1000;
62 lpagb |= LPA_1000FULL;
63 break;
64 case 100:
65 bmsr |= BMSR_100FULL;
66 bmcr |= BMCR_SPEED100;
67 lpa |= LPA_100FULL;
68 break;
69 case 10:
70 bmsr |= BMSR_10FULL;
71 lpa |= LPA_10FULL;
72 break;
73 default:
74 pr_warn("fixed phy: unknown speed\n");
75 return -EINVAL;
76 }
77 } else {
78 switch (fp->status.speed) {
79 case 1000:
80 bmsr |= BMSR_ESTATEN;
81 bmcr |= BMCR_SPEED1000;
82 lpagb |= LPA_1000HALF;
83 break;
84 case 100:
85 bmsr |= BMSR_100HALF;
86 bmcr |= BMCR_SPEED100;
87 lpa |= LPA_100HALF;
88 break;
89 case 10:
90 bmsr |= BMSR_10HALF;
91 lpa |= LPA_10HALF;
92 break;
93 default:
94 pr_warn("fixed phy: unknown speed\n");
95 return -EINVAL;
96 }
97 }
98
99 if (fp->status.link)
100 bmsr |= BMSR_LSTATUS | BMSR_ANEGCOMPLETE;
101
102 if (fp->status.pause)
103 lpa |= LPA_PAUSE_CAP;
104
105 if (fp->status.asym_pause)
106 lpa |= LPA_PAUSE_ASYM;
107
108 fp->regs[MII_PHYSID1] = 0;
109 fp->regs[MII_PHYSID2] = 0;
110
111 fp->regs[MII_BMSR] = bmsr;
112 fp->regs[MII_BMCR] = bmcr;
113 fp->regs[MII_LPA] = lpa;
114 fp->regs[MII_STAT1000] = lpagb;
115
116 return 0;
117}
118
119static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
120{
121 struct fixed_mdio_bus *fmb = bus->priv;
122 struct fixed_phy *fp;
123
124 if (reg_num >= MII_REGS_NUM)
125 return -1;
126
127 /* We do not support emulating Clause 45 over Clause 22 register reads
128 * return an error instead of bogus data.
129 */
130 switch (reg_num) {
131 case MII_MMD_CTRL:
132 case MII_MMD_DATA:
133 return -1;
134 default:
135 break;
136 }
137
138 list_for_each_entry(fp, &fmb->phys, node) {
139 if (fp->addr == phy_addr) {
140 /* Issue callback if user registered it. */
141 if (fp->link_update) {
142 fp->link_update(fp->phydev->attached_dev,
143 &fp->status);
144 fixed_phy_update_regs(fp);
145 }
146 return fp->regs[reg_num];
147 }
148 }
149
150 return 0xFFFF;
151}
152
153static int fixed_mdio_write(struct mii_bus *bus, int phy_addr, int reg_num,
154 u16 val)
155{
156 return 0;
157}
158
159/*
160 * If something weird is required to be done with link/speed,
161 * network driver is able to assign a function to implement this.
162 * May be useful for PHY's that need to be software-driven.
163 */
164int fixed_phy_set_link_update(struct phy_device *phydev,
165 int (*link_update)(struct net_device *,
166 struct fixed_phy_status *))
167{
168 struct fixed_mdio_bus *fmb = &platform_fmb;
169 struct fixed_phy *fp;
170
171 if (!link_update || !phydev || !phydev->bus)
172 return -EINVAL;
173
174 list_for_each_entry(fp, &fmb->phys, node) {
175 if (fp->addr == phydev->addr) {
176 fp->link_update = link_update;
177 fp->phydev = phydev;
178 return 0;
179 }
180 }
181
182 return -ENOENT;
183}
184EXPORT_SYMBOL_GPL(fixed_phy_set_link_update);
185
186int fixed_phy_add(unsigned int irq, int phy_addr,
187 struct fixed_phy_status *status)
188{
189 int ret;
190 struct fixed_mdio_bus *fmb = &platform_fmb;
191 struct fixed_phy *fp;
192
193 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
194 if (!fp)
195 return -ENOMEM;
196
197 memset(fp->regs, 0xFF, sizeof(fp->regs[0]) * MII_REGS_NUM);
198
199 fmb->irqs[phy_addr] = irq;
200
201 fp->addr = phy_addr;
202 fp->status = *status;
203
204 ret = fixed_phy_update_regs(fp);
205 if (ret)
206 goto err_regs;
207
208 list_add_tail(&fp->node, &fmb->phys);
209
210 return 0;
211
212err_regs:
213 kfree(fp);
214 return ret;
215}
216EXPORT_SYMBOL_GPL(fixed_phy_add);
217
218void fixed_phy_del(int phy_addr)
219{
220 struct fixed_mdio_bus *fmb = &platform_fmb;
221 struct fixed_phy *fp, *tmp;
222
223 list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
224 if (fp->addr == phy_addr) {
225 list_del(&fp->node);
226 kfree(fp);
227 return;
228 }
229 }
230}
231EXPORT_SYMBOL_GPL(fixed_phy_del);
232
233static int phy_fixed_addr;
234static DEFINE_SPINLOCK(phy_fixed_addr_lock);
235
236struct phy_device *fixed_phy_register(unsigned int irq,
237 struct fixed_phy_status *status,
238 struct device_node *np)
239{
240 struct fixed_mdio_bus *fmb = &platform_fmb;
241 struct phy_device *phy;
242 int phy_addr;
243 int ret;
244
245 /* Get the next available PHY address, up to PHY_MAX_ADDR */
246 spin_lock(&phy_fixed_addr_lock);
247 if (phy_fixed_addr == PHY_MAX_ADDR) {
248 spin_unlock(&phy_fixed_addr_lock);
249 return ERR_PTR(-ENOSPC);
250 }
251 phy_addr = phy_fixed_addr++;
252 spin_unlock(&phy_fixed_addr_lock);
253
254 ret = fixed_phy_add(PHY_POLL, phy_addr, status);
255 if (ret < 0)
256 return ERR_PTR(ret);
257
258 phy = get_phy_device(fmb->mii_bus, phy_addr, false);
259 if (!phy || IS_ERR(phy)) {
260 fixed_phy_del(phy_addr);
261 return ERR_PTR(-EINVAL);
262 }
263
264 of_node_get(np);
265 phy->dev.of_node = np;
266
267 ret = phy_device_register(phy);
268 if (ret) {
269 phy_device_free(phy);
270 of_node_put(np);
271 fixed_phy_del(phy_addr);
272 return ERR_PTR(ret);
273 }
274
275 return phy;
276}
277EXPORT_SYMBOL_GPL(fixed_phy_register);
278
279static int __init fixed_mdio_bus_init(void)
280{
281 struct fixed_mdio_bus *fmb = &platform_fmb;
282 int ret;
283
284 pdev = platform_device_register_simple("Fixed MDIO bus", 0, NULL, 0);
285 if (IS_ERR(pdev)) {
286 ret = PTR_ERR(pdev);
287 goto err_pdev;
288 }
289
290 fmb->mii_bus = mdiobus_alloc();
291 if (fmb->mii_bus == NULL) {
292 ret = -ENOMEM;
293 goto err_mdiobus_reg;
294 }
295
296 snprintf(fmb->mii_bus->id, MII_BUS_ID_SIZE, "fixed-0");
297 fmb->mii_bus->name = "Fixed MDIO Bus";
298 fmb->mii_bus->priv = fmb;
299 fmb->mii_bus->parent = &pdev->dev;
300 fmb->mii_bus->read = &fixed_mdio_read;
301 fmb->mii_bus->write = &fixed_mdio_write;
302 fmb->mii_bus->irq = fmb->irqs;
303
304 ret = mdiobus_register(fmb->mii_bus);
305 if (ret)
306 goto err_mdiobus_alloc;
307
308 return 0;
309
310err_mdiobus_alloc:
311 mdiobus_free(fmb->mii_bus);
312err_mdiobus_reg:
313 platform_device_unregister(pdev);
314err_pdev:
315 return ret;
316}
317module_init(fixed_mdio_bus_init);
318
319static void __exit fixed_mdio_bus_exit(void)
320{
321 struct fixed_mdio_bus *fmb = &platform_fmb;
322 struct fixed_phy *fp, *tmp;
323
324 mdiobus_unregister(fmb->mii_bus);
325 mdiobus_free(fmb->mii_bus);
326 platform_device_unregister(pdev);
327
328 list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
329 list_del(&fp->node);
330 kfree(fp);
331 }
332}
333module_exit(fixed_mdio_bus_exit);
334
335MODULE_DESCRIPTION("Fixed MDIO bus (MDIO bus emulation with fixed PHYs)");
336MODULE_AUTHOR("Vitaly Bordug");
337MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-13 05:37:45 -0400