Commit | Line | Data |
---|---|---|
1d3bb996 DG |
1 | /* |
2 | * drivers/net/ibm_newemac/rgmii.c | |
3 | * | |
4 | * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support. | |
5 | * | |
17cf803a BH |
6 | * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. |
7 | * <benh@kernel.crashing.org> | |
8 | * | |
9 | * Based on the arch/ppc version of the driver: | |
10 | * | |
1d3bb996 DG |
11 | * Copyright (c) 2004, 2005 Zultys Technologies. |
12 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
13 | * | |
14 | * Based on original work by | |
15 | * Matt Porter <mporter@kernel.crashing.org> | |
16 | * Copyright 2004 MontaVista Software, Inc. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify it | |
19 | * under the terms of the GNU General Public License as published by the | |
20 | * Free Software Foundation; either version 2 of the License, or (at your | |
21 | * option) any later version. | |
22 | * | |
23 | */ | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/ethtool.h> | |
26 | #include <asm/io.h> | |
27 | ||
28 | #include "emac.h" | |
29 | #include "debug.h" | |
30 | ||
31 | // XXX FIXME: Axon seems to support a subset of the RGMII, we | |
32 | // thus need to take that into account and possibly change some | |
33 | // of the bit settings below that don't seem to quite match the | |
34 | // AXON spec | |
35 | ||
36 | /* RGMIIx_FER */ | |
37 | #define RGMII_FER_MASK(idx) (0x7 << ((idx) * 4)) | |
38 | #define RGMII_FER_RTBI(idx) (0x4 << ((idx) * 4)) | |
39 | #define RGMII_FER_RGMII(idx) (0x5 << ((idx) * 4)) | |
40 | #define RGMII_FER_TBI(idx) (0x6 << ((idx) * 4)) | |
41 | #define RGMII_FER_GMII(idx) (0x7 << ((idx) * 4)) | |
42 | ||
43 | /* RGMIIx_SSR */ | |
44 | #define RGMII_SSR_MASK(idx) (0x7 << ((idx) * 8)) | |
45 | #define RGMII_SSR_100(idx) (0x2 << ((idx) * 8)) | |
46 | #define RGMII_SSR_1000(idx) (0x4 << ((idx) * 8)) | |
47 | ||
48 | /* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */ | |
49 | static inline int rgmii_valid_mode(int phy_mode) | |
50 | { | |
51 | return phy_mode == PHY_MODE_GMII || | |
52 | phy_mode == PHY_MODE_RGMII || | |
53 | phy_mode == PHY_MODE_TBI || | |
54 | phy_mode == PHY_MODE_RTBI; | |
55 | } | |
56 | ||
57 | static inline const char *rgmii_mode_name(int mode) | |
58 | { | |
59 | switch (mode) { | |
60 | case PHY_MODE_RGMII: | |
61 | return "RGMII"; | |
62 | case PHY_MODE_TBI: | |
63 | return "TBI"; | |
64 | case PHY_MODE_GMII: | |
65 | return "GMII"; | |
66 | case PHY_MODE_RTBI: | |
67 | return "RTBI"; | |
68 | default: | |
69 | BUG(); | |
70 | } | |
71 | } | |
72 | ||
73 | static inline u32 rgmii_mode_mask(int mode, int input) | |
74 | { | |
75 | switch (mode) { | |
76 | case PHY_MODE_RGMII: | |
77 | return RGMII_FER_RGMII(input); | |
78 | case PHY_MODE_TBI: | |
79 | return RGMII_FER_TBI(input); | |
80 | case PHY_MODE_GMII: | |
81 | return RGMII_FER_GMII(input); | |
82 | case PHY_MODE_RTBI: | |
83 | return RGMII_FER_RTBI(input); | |
84 | default: | |
85 | BUG(); | |
86 | } | |
87 | } | |
88 | ||
89 | int __devinit rgmii_attach(struct of_device *ofdev, int input, int mode) | |
90 | { | |
91 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 92 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
93 | |
94 | RGMII_DBG(dev, "attach(%d)" NL, input); | |
95 | ||
96 | /* Check if we need to attach to a RGMII */ | |
97 | if (input < 0 || !rgmii_valid_mode(mode)) { | |
98 | printk(KERN_ERR "%s: unsupported settings !\n", | |
99 | ofdev->node->full_name); | |
100 | return -ENODEV; | |
101 | } | |
102 | ||
103 | mutex_lock(&dev->lock); | |
104 | ||
105 | /* Enable this input */ | |
106 | out_be32(&p->fer, in_be32(&p->fer) | rgmii_mode_mask(mode, input)); | |
107 | ||
108 | printk(KERN_NOTICE "%s: input %d in %s mode\n", | |
109 | ofdev->node->full_name, input, rgmii_mode_name(mode)); | |
110 | ||
111 | ++dev->users; | |
112 | ||
113 | mutex_unlock(&dev->lock); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | void rgmii_set_speed(struct of_device *ofdev, int input, int speed) | |
119 | { | |
120 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 121 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
122 | u32 ssr; |
123 | ||
124 | mutex_lock(&dev->lock); | |
125 | ||
126 | ssr = in_be32(&p->ssr) & ~RGMII_SSR_MASK(input); | |
127 | ||
128 | RGMII_DBG(dev, "speed(%d, %d)" NL, input, speed); | |
129 | ||
130 | if (speed == SPEED_1000) | |
131 | ssr |= RGMII_SSR_1000(input); | |
132 | else if (speed == SPEED_100) | |
133 | ssr |= RGMII_SSR_100(input); | |
134 | ||
135 | out_be32(&p->ssr, ssr); | |
136 | ||
137 | mutex_unlock(&dev->lock); | |
138 | } | |
139 | ||
140 | void rgmii_get_mdio(struct of_device *ofdev, int input) | |
141 | { | |
142 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 143 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
144 | u32 fer; |
145 | ||
146 | RGMII_DBG2(dev, "get_mdio(%d)" NL, input); | |
147 | ||
1f57877a | 148 | if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO)) |
1d3bb996 DG |
149 | return; |
150 | ||
151 | mutex_lock(&dev->lock); | |
152 | ||
153 | fer = in_be32(&p->fer); | |
154 | fer |= 0x00080000u >> input; | |
155 | out_be32(&p->fer, fer); | |
156 | (void)in_be32(&p->fer); | |
157 | ||
158 | DBG2(dev, " fer = 0x%08x\n", fer); | |
159 | } | |
160 | ||
161 | void rgmii_put_mdio(struct of_device *ofdev, int input) | |
162 | { | |
163 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 164 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
165 | u32 fer; |
166 | ||
167 | RGMII_DBG2(dev, "put_mdio(%d)" NL, input); | |
168 | ||
1f57877a | 169 | if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO)) |
1d3bb996 DG |
170 | return; |
171 | ||
172 | fer = in_be32(&p->fer); | |
173 | fer &= ~(0x00080000u >> input); | |
174 | out_be32(&p->fer, fer); | |
175 | (void)in_be32(&p->fer); | |
176 | ||
177 | DBG2(dev, " fer = 0x%08x\n", fer); | |
178 | ||
179 | mutex_unlock(&dev->lock); | |
180 | } | |
181 | ||
51d4a1cc | 182 | void rgmii_detach(struct of_device *ofdev, int input) |
1d3bb996 DG |
183 | { |
184 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 185 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
186 | |
187 | mutex_lock(&dev->lock); | |
188 | ||
189 | BUG_ON(!dev || dev->users == 0); | |
190 | ||
191 | RGMII_DBG(dev, "detach(%d)" NL, input); | |
192 | ||
193 | /* Disable this input */ | |
194 | out_be32(&p->fer, in_be32(&p->fer) & ~RGMII_FER_MASK(input)); | |
195 | ||
196 | --dev->users; | |
197 | ||
198 | mutex_unlock(&dev->lock); | |
199 | } | |
200 | ||
201 | int rgmii_get_regs_len(struct of_device *ofdev) | |
202 | { | |
203 | return sizeof(struct emac_ethtool_regs_subhdr) + | |
204 | sizeof(struct rgmii_regs); | |
205 | } | |
206 | ||
207 | void *rgmii_dump_regs(struct of_device *ofdev, void *buf) | |
208 | { | |
209 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
210 | struct emac_ethtool_regs_subhdr *hdr = buf; | |
211 | struct rgmii_regs *regs = (struct rgmii_regs *)(hdr + 1); | |
212 | ||
213 | hdr->version = 0; | |
214 | hdr->index = 0; /* for now, are there chips with more than one | |
215 | * rgmii ? if yes, then we'll add a cell_index | |
216 | * like we do for emac | |
217 | */ | |
218 | memcpy_fromio(regs, dev->base, sizeof(struct rgmii_regs)); | |
219 | return regs + 1; | |
220 | } | |
221 | ||
222 | ||
223 | static int __devinit rgmii_probe(struct of_device *ofdev, | |
224 | const struct of_device_id *match) | |
225 | { | |
226 | struct device_node *np = ofdev->node; | |
227 | struct rgmii_instance *dev; | |
228 | struct resource regs; | |
229 | int rc; | |
230 | ||
231 | rc = -ENOMEM; | |
232 | dev = kzalloc(sizeof(struct rgmii_instance), GFP_KERNEL); | |
233 | if (dev == NULL) { | |
234 | printk(KERN_ERR "%s: could not allocate RGMII device!\n", | |
235 | np->full_name); | |
236 | goto err_gone; | |
237 | } | |
238 | ||
239 | mutex_init(&dev->lock); | |
240 | dev->ofdev = ofdev; | |
241 | ||
242 | rc = -ENXIO; | |
243 | if (of_address_to_resource(np, 0, ®s)) { | |
244 | printk(KERN_ERR "%s: Can't get registers address\n", | |
245 | np->full_name); | |
246 | goto err_free; | |
247 | } | |
248 | ||
249 | rc = -ENOMEM; | |
eb4d84f1 | 250 | dev->base = (struct rgmii_regs __iomem *)ioremap(regs.start, |
1d3bb996 DG |
251 | sizeof(struct rgmii_regs)); |
252 | if (dev->base == NULL) { | |
253 | printk(KERN_ERR "%s: Can't map device registers!\n", | |
254 | np->full_name); | |
255 | goto err_free; | |
256 | } | |
257 | ||
1f57877a BH |
258 | /* Check for RGMII flags */ |
259 | if (of_get_property(ofdev->node, "has-mdio", NULL)) | |
260 | dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO; | |
261 | ||
262 | /* CAB lacks the right properties, fix this up */ | |
97be91c1 | 263 | if (of_device_is_compatible(ofdev->node, "ibm,rgmii-axon")) |
1f57877a | 264 | dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO; |
1d3bb996 DG |
265 | |
266 | DBG2(dev, " Boot FER = 0x%08x, SSR = 0x%08x\n", | |
267 | in_be32(&dev->base->fer), in_be32(&dev->base->ssr)); | |
268 | ||
269 | /* Disable all inputs by default */ | |
270 | out_be32(&dev->base->fer, 0); | |
271 | ||
272 | printk(KERN_INFO | |
1f57877a BH |
273 | "RGMII %s initialized with%s MDIO support\n", |
274 | ofdev->node->full_name, | |
275 | (dev->flags & EMAC_RGMII_FLAG_HAS_MDIO) ? "" : "out"); | |
1d3bb996 DG |
276 | |
277 | wmb(); | |
278 | dev_set_drvdata(&ofdev->dev, dev); | |
279 | ||
280 | return 0; | |
281 | ||
282 | err_free: | |
283 | kfree(dev); | |
284 | err_gone: | |
285 | return rc; | |
286 | } | |
287 | ||
288 | static int __devexit rgmii_remove(struct of_device *ofdev) | |
289 | { | |
290 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
291 | ||
292 | dev_set_drvdata(&ofdev->dev, NULL); | |
293 | ||
294 | WARN_ON(dev->users != 0); | |
295 | ||
296 | iounmap(dev->base); | |
297 | kfree(dev); | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static struct of_device_id rgmii_match[] = | |
303 | { | |
304 | { | |
1d3bb996 DG |
305 | .compatible = "ibm,rgmii", |
306 | }, | |
307 | { | |
308 | .type = "emac-rgmii", | |
309 | }, | |
310 | {}, | |
311 | }; | |
312 | ||
313 | static struct of_platform_driver rgmii_driver = { | |
314 | .name = "emac-rgmii", | |
315 | .match_table = rgmii_match, | |
316 | ||
317 | .probe = rgmii_probe, | |
318 | .remove = rgmii_remove, | |
319 | }; | |
320 | ||
321 | int __init rgmii_init(void) | |
322 | { | |
323 | return of_register_platform_driver(&rgmii_driver); | |
324 | } | |
325 | ||
326 | void rgmii_exit(void) | |
327 | { | |
328 | of_unregister_platform_driver(&rgmii_driver); | |
329 | } |