Commit | Line | Data |
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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 | */ | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1d3bb996 DG |
25 | #include <linux/kernel.h> |
26 | #include <linux/ethtool.h> | |
27 | #include <asm/io.h> | |
28 | ||
29 | #include "emac.h" | |
30 | #include "debug.h" | |
31 | ||
32 | // XXX FIXME: Axon seems to support a subset of the RGMII, we | |
33 | // thus need to take that into account and possibly change some | |
34 | // of the bit settings below that don't seem to quite match the | |
35 | // AXON spec | |
36 | ||
37 | /* RGMIIx_FER */ | |
38 | #define RGMII_FER_MASK(idx) (0x7 << ((idx) * 4)) | |
39 | #define RGMII_FER_RTBI(idx) (0x4 << ((idx) * 4)) | |
40 | #define RGMII_FER_RGMII(idx) (0x5 << ((idx) * 4)) | |
41 | #define RGMII_FER_TBI(idx) (0x6 << ((idx) * 4)) | |
42 | #define RGMII_FER_GMII(idx) (0x7 << ((idx) * 4)) | |
004ea683 | 43 | #define RGMII_FER_MII(idx) RGMII_FER_GMII(idx) |
1d3bb996 DG |
44 | |
45 | /* RGMIIx_SSR */ | |
46 | #define RGMII_SSR_MASK(idx) (0x7 << ((idx) * 8)) | |
47 | #define RGMII_SSR_100(idx) (0x2 << ((idx) * 8)) | |
48 | #define RGMII_SSR_1000(idx) (0x4 << ((idx) * 8)) | |
49 | ||
50 | /* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */ | |
51 | static inline int rgmii_valid_mode(int phy_mode) | |
52 | { | |
53 | return phy_mode == PHY_MODE_GMII || | |
004ea683 | 54 | phy_mode == PHY_MODE_MII || |
1d3bb996 DG |
55 | phy_mode == PHY_MODE_RGMII || |
56 | phy_mode == PHY_MODE_TBI || | |
57 | phy_mode == PHY_MODE_RTBI; | |
58 | } | |
59 | ||
60 | static inline const char *rgmii_mode_name(int mode) | |
61 | { | |
62 | switch (mode) { | |
63 | case PHY_MODE_RGMII: | |
64 | return "RGMII"; | |
65 | case PHY_MODE_TBI: | |
66 | return "TBI"; | |
67 | case PHY_MODE_GMII: | |
68 | return "GMII"; | |
004ea683 GE |
69 | case PHY_MODE_MII: |
70 | return "MII"; | |
1d3bb996 DG |
71 | case PHY_MODE_RTBI: |
72 | return "RTBI"; | |
73 | default: | |
74 | BUG(); | |
75 | } | |
76 | } | |
77 | ||
78 | static inline u32 rgmii_mode_mask(int mode, int input) | |
79 | { | |
80 | switch (mode) { | |
81 | case PHY_MODE_RGMII: | |
82 | return RGMII_FER_RGMII(input); | |
83 | case PHY_MODE_TBI: | |
84 | return RGMII_FER_TBI(input); | |
85 | case PHY_MODE_GMII: | |
86 | return RGMII_FER_GMII(input); | |
004ea683 GE |
87 | case PHY_MODE_MII: |
88 | return RGMII_FER_MII(input); | |
1d3bb996 DG |
89 | case PHY_MODE_RTBI: |
90 | return RGMII_FER_RTBI(input); | |
91 | default: | |
92 | BUG(); | |
93 | } | |
94 | } | |
95 | ||
2dc11581 | 96 | int __devinit rgmii_attach(struct platform_device *ofdev, int input, int mode) |
1d3bb996 DG |
97 | { |
98 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 99 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
100 | |
101 | RGMII_DBG(dev, "attach(%d)" NL, input); | |
102 | ||
103 | /* Check if we need to attach to a RGMII */ | |
104 | if (input < 0 || !rgmii_valid_mode(mode)) { | |
105 | printk(KERN_ERR "%s: unsupported settings !\n", | |
61c7a080 | 106 | ofdev->dev.of_node->full_name); |
1d3bb996 DG |
107 | return -ENODEV; |
108 | } | |
109 | ||
110 | mutex_lock(&dev->lock); | |
111 | ||
112 | /* Enable this input */ | |
113 | out_be32(&p->fer, in_be32(&p->fer) | rgmii_mode_mask(mode, input)); | |
114 | ||
115 | printk(KERN_NOTICE "%s: input %d in %s mode\n", | |
61c7a080 | 116 | ofdev->dev.of_node->full_name, input, rgmii_mode_name(mode)); |
1d3bb996 DG |
117 | |
118 | ++dev->users; | |
119 | ||
120 | mutex_unlock(&dev->lock); | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
2dc11581 | 125 | void rgmii_set_speed(struct platform_device *ofdev, int input, int speed) |
1d3bb996 DG |
126 | { |
127 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 128 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
129 | u32 ssr; |
130 | ||
131 | mutex_lock(&dev->lock); | |
132 | ||
133 | ssr = in_be32(&p->ssr) & ~RGMII_SSR_MASK(input); | |
134 | ||
135 | RGMII_DBG(dev, "speed(%d, %d)" NL, input, speed); | |
136 | ||
137 | if (speed == SPEED_1000) | |
138 | ssr |= RGMII_SSR_1000(input); | |
139 | else if (speed == SPEED_100) | |
140 | ssr |= RGMII_SSR_100(input); | |
141 | ||
142 | out_be32(&p->ssr, ssr); | |
143 | ||
144 | mutex_unlock(&dev->lock); | |
145 | } | |
146 | ||
2dc11581 | 147 | void rgmii_get_mdio(struct platform_device *ofdev, int input) |
1d3bb996 DG |
148 | { |
149 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 150 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
151 | u32 fer; |
152 | ||
153 | RGMII_DBG2(dev, "get_mdio(%d)" NL, input); | |
154 | ||
1f57877a | 155 | if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO)) |
1d3bb996 DG |
156 | return; |
157 | ||
158 | mutex_lock(&dev->lock); | |
159 | ||
160 | fer = in_be32(&p->fer); | |
161 | fer |= 0x00080000u >> input; | |
162 | out_be32(&p->fer, fer); | |
163 | (void)in_be32(&p->fer); | |
164 | ||
165 | DBG2(dev, " fer = 0x%08x\n", fer); | |
166 | } | |
167 | ||
2dc11581 | 168 | void rgmii_put_mdio(struct platform_device *ofdev, int input) |
1d3bb996 DG |
169 | { |
170 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
eb4d84f1 | 171 | struct rgmii_regs __iomem *p = dev->base; |
1d3bb996 DG |
172 | u32 fer; |
173 | ||
174 | RGMII_DBG2(dev, "put_mdio(%d)" NL, input); | |
175 | ||
1f57877a | 176 | if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO)) |
1d3bb996 DG |
177 | return; |
178 | ||
179 | fer = in_be32(&p->fer); | |
180 | fer &= ~(0x00080000u >> input); | |
181 | out_be32(&p->fer, fer); | |
182 | (void)in_be32(&p->fer); | |
183 | ||
184 | DBG2(dev, " fer = 0x%08x\n", fer); | |
185 | ||
186 | mutex_unlock(&dev->lock); | |
187 | } | |
188 | ||
2dc11581 | 189 | void rgmii_detach(struct platform_device *ofdev, int input) |
1d3bb996 DG |
190 | { |
191 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
0021195c | 192 | struct rgmii_regs __iomem *p; |
1d3bb996 DG |
193 | |
194 | BUG_ON(!dev || dev->users == 0); | |
0021195c JL |
195 | p = dev->base; |
196 | ||
197 | mutex_lock(&dev->lock); | |
1d3bb996 DG |
198 | |
199 | RGMII_DBG(dev, "detach(%d)" NL, input); | |
200 | ||
201 | /* Disable this input */ | |
202 | out_be32(&p->fer, in_be32(&p->fer) & ~RGMII_FER_MASK(input)); | |
203 | ||
204 | --dev->users; | |
205 | ||
206 | mutex_unlock(&dev->lock); | |
207 | } | |
208 | ||
2dc11581 | 209 | int rgmii_get_regs_len(struct platform_device *ofdev) |
1d3bb996 DG |
210 | { |
211 | return sizeof(struct emac_ethtool_regs_subhdr) + | |
212 | sizeof(struct rgmii_regs); | |
213 | } | |
214 | ||
2dc11581 | 215 | void *rgmii_dump_regs(struct platform_device *ofdev, void *buf) |
1d3bb996 DG |
216 | { |
217 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
218 | struct emac_ethtool_regs_subhdr *hdr = buf; | |
219 | struct rgmii_regs *regs = (struct rgmii_regs *)(hdr + 1); | |
220 | ||
221 | hdr->version = 0; | |
222 | hdr->index = 0; /* for now, are there chips with more than one | |
223 | * rgmii ? if yes, then we'll add a cell_index | |
224 | * like we do for emac | |
225 | */ | |
226 | memcpy_fromio(regs, dev->base, sizeof(struct rgmii_regs)); | |
227 | return regs + 1; | |
228 | } | |
229 | ||
230 | ||
2dc11581 | 231 | static int __devinit rgmii_probe(struct platform_device *ofdev, |
1d3bb996 DG |
232 | const struct of_device_id *match) |
233 | { | |
61c7a080 | 234 | struct device_node *np = ofdev->dev.of_node; |
1d3bb996 DG |
235 | struct rgmii_instance *dev; |
236 | struct resource regs; | |
237 | int rc; | |
238 | ||
239 | rc = -ENOMEM; | |
240 | dev = kzalloc(sizeof(struct rgmii_instance), GFP_KERNEL); | |
241 | if (dev == NULL) { | |
242 | printk(KERN_ERR "%s: could not allocate RGMII device!\n", | |
243 | np->full_name); | |
244 | goto err_gone; | |
245 | } | |
246 | ||
247 | mutex_init(&dev->lock); | |
248 | dev->ofdev = ofdev; | |
249 | ||
250 | rc = -ENXIO; | |
251 | if (of_address_to_resource(np, 0, ®s)) { | |
252 | printk(KERN_ERR "%s: Can't get registers address\n", | |
253 | np->full_name); | |
254 | goto err_free; | |
255 | } | |
256 | ||
257 | rc = -ENOMEM; | |
eb4d84f1 | 258 | dev->base = (struct rgmii_regs __iomem *)ioremap(regs.start, |
1d3bb996 DG |
259 | sizeof(struct rgmii_regs)); |
260 | if (dev->base == NULL) { | |
261 | printk(KERN_ERR "%s: Can't map device registers!\n", | |
262 | np->full_name); | |
263 | goto err_free; | |
264 | } | |
265 | ||
1f57877a | 266 | /* Check for RGMII flags */ |
61c7a080 | 267 | if (of_get_property(ofdev->dev.of_node, "has-mdio", NULL)) |
1f57877a BH |
268 | dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO; |
269 | ||
270 | /* CAB lacks the right properties, fix this up */ | |
61c7a080 | 271 | if (of_device_is_compatible(ofdev->dev.of_node, "ibm,rgmii-axon")) |
1f57877a | 272 | dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO; |
1d3bb996 DG |
273 | |
274 | DBG2(dev, " Boot FER = 0x%08x, SSR = 0x%08x\n", | |
275 | in_be32(&dev->base->fer), in_be32(&dev->base->ssr)); | |
276 | ||
277 | /* Disable all inputs by default */ | |
278 | out_be32(&dev->base->fer, 0); | |
279 | ||
280 | printk(KERN_INFO | |
1f57877a | 281 | "RGMII %s initialized with%s MDIO support\n", |
61c7a080 | 282 | ofdev->dev.of_node->full_name, |
1f57877a | 283 | (dev->flags & EMAC_RGMII_FLAG_HAS_MDIO) ? "" : "out"); |
1d3bb996 DG |
284 | |
285 | wmb(); | |
286 | dev_set_drvdata(&ofdev->dev, dev); | |
287 | ||
288 | return 0; | |
289 | ||
290 | err_free: | |
291 | kfree(dev); | |
292 | err_gone: | |
293 | return rc; | |
294 | } | |
295 | ||
2dc11581 | 296 | static int __devexit rgmii_remove(struct platform_device *ofdev) |
1d3bb996 DG |
297 | { |
298 | struct rgmii_instance *dev = dev_get_drvdata(&ofdev->dev); | |
299 | ||
300 | dev_set_drvdata(&ofdev->dev, NULL); | |
301 | ||
302 | WARN_ON(dev->users != 0); | |
303 | ||
304 | iounmap(dev->base); | |
305 | kfree(dev); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | static struct of_device_id rgmii_match[] = | |
311 | { | |
312 | { | |
1d3bb996 DG |
313 | .compatible = "ibm,rgmii", |
314 | }, | |
315 | { | |
316 | .type = "emac-rgmii", | |
317 | }, | |
318 | {}, | |
319 | }; | |
320 | ||
321 | static struct of_platform_driver rgmii_driver = { | |
4018294b GL |
322 | .driver = { |
323 | .name = "emac-rgmii", | |
324 | .owner = THIS_MODULE, | |
325 | .of_match_table = rgmii_match, | |
326 | }, | |
1d3bb996 DG |
327 | .probe = rgmii_probe, |
328 | .remove = rgmii_remove, | |
329 | }; | |
330 | ||
331 | int __init rgmii_init(void) | |
332 | { | |
333 | return of_register_platform_driver(&rgmii_driver); | |
334 | } | |
335 | ||
336 | void rgmii_exit(void) | |
337 | { | |
338 | of_unregister_platform_driver(&rgmii_driver); | |
339 | } |