Commit | Line | Data |
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48257c4f PA |
1 | /* |
2 | * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. | |
3 | * | |
9b8ee8e7 | 4 | * Copyright (c) 2003 Intracom S.A. |
48257c4f | 5 | * by Pantelis Antoniou <panto@intracom.gr> |
9b8ee8e7 VB |
6 | * |
7 | * 2005 (c) MontaVista Software, Inc. | |
48257c4f PA |
8 | * Vitaly Bordug <vbordug@ru.mvista.com> |
9 | * | |
9b8ee8e7 VB |
10 | * This file is licensed under the terms of the GNU General Public License |
11 | * version 2. This program is licensed "as is" without any warranty of any | |
48257c4f PA |
12 | * kind, whether express or implied. |
13 | */ | |
14 | ||
48257c4f | 15 | #include <linux/module.h> |
48257c4f PA |
16 | #include <linux/ioport.h> |
17 | #include <linux/slab.h> | |
48257c4f | 18 | #include <linux/init.h> |
2b5b3a60 | 19 | #include <linux/interrupt.h> |
48257c4f PA |
20 | #include <linux/netdevice.h> |
21 | #include <linux/etherdevice.h> | |
48257c4f | 22 | #include <linux/mii.h> |
5b4b8454 | 23 | #include <linux/platform_device.h> |
2b5b3a60 | 24 | #include <linux/mdio-bitbang.h> |
48257c4f | 25 | |
976de6a8 SW |
26 | #ifdef CONFIG_PPC_CPM_NEW_BINDING |
27 | #include <linux/of_platform.h> | |
28 | #endif | |
48257c4f PA |
29 | |
30 | #include "fs_enet.h" | |
31 | ||
976de6a8 | 32 | struct bb_info { |
2b5b3a60 | 33 | struct mdiobb_ctrl ctrl; |
976de6a8 SW |
34 | __be32 __iomem *dir; |
35 | __be32 __iomem *dat; | |
36 | u32 mdio_msk; | |
37 | u32 mdc_msk; | |
976de6a8 SW |
38 | }; |
39 | ||
40 | /* FIXME: If any other users of GPIO crop up, then these will have to | |
41 | * have some sort of global synchronization to avoid races with other | |
42 | * pins on the same port. The ideal solution would probably be to | |
43 | * bind the ports to a GPIO driver, and have this be a client of it. | |
44 | */ | |
45 | static inline void bb_set(u32 __iomem *p, u32 m) | |
48257c4f | 46 | { |
976de6a8 | 47 | out_be32(p, in_be32(p) | m); |
48257c4f PA |
48 | } |
49 | ||
976de6a8 | 50 | static inline void bb_clr(u32 __iomem *p, u32 m) |
48257c4f | 51 | { |
976de6a8 | 52 | out_be32(p, in_be32(p) & ~m); |
48257c4f PA |
53 | } |
54 | ||
976de6a8 | 55 | static inline int bb_read(u32 __iomem *p, u32 m) |
48257c4f | 56 | { |
976de6a8 | 57 | return (in_be32(p) & m) != 0; |
48257c4f PA |
58 | } |
59 | ||
2b5b3a60 | 60 | static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir) |
48257c4f | 61 | { |
2b5b3a60 | 62 | struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); |
48257c4f | 63 | |
2b5b3a60 SW |
64 | if (dir) |
65 | bb_set(bitbang->dir, bitbang->mdio_msk); | |
66 | else | |
67 | bb_clr(bitbang->dir, bitbang->mdio_msk); | |
68 | ||
69 | /* Read back to flush the write. */ | |
70 | in_be32(bitbang->dir); | |
48257c4f PA |
71 | } |
72 | ||
2b5b3a60 | 73 | static inline int mdio_read(struct mdiobb_ctrl *ctrl) |
48257c4f | 74 | { |
2b5b3a60 | 75 | struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); |
976de6a8 | 76 | return bb_read(bitbang->dat, bitbang->mdio_msk); |
48257c4f PA |
77 | } |
78 | ||
2b5b3a60 | 79 | static inline void mdio(struct mdiobb_ctrl *ctrl, int what) |
48257c4f | 80 | { |
2b5b3a60 SW |
81 | struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); |
82 | ||
48257c4f | 83 | if (what) |
976de6a8 | 84 | bb_set(bitbang->dat, bitbang->mdio_msk); |
48257c4f | 85 | else |
976de6a8 | 86 | bb_clr(bitbang->dat, bitbang->mdio_msk); |
2b5b3a60 SW |
87 | |
88 | /* Read back to flush the write. */ | |
89 | in_be32(bitbang->dat); | |
48257c4f PA |
90 | } |
91 | ||
2b5b3a60 | 92 | static inline void mdc(struct mdiobb_ctrl *ctrl, int what) |
48257c4f | 93 | { |
2b5b3a60 SW |
94 | struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); |
95 | ||
48257c4f | 96 | if (what) |
976de6a8 | 97 | bb_set(bitbang->dat, bitbang->mdc_msk); |
48257c4f | 98 | else |
976de6a8 | 99 | bb_clr(bitbang->dat, bitbang->mdc_msk); |
48257c4f | 100 | |
2b5b3a60 SW |
101 | /* Read back to flush the write. */ |
102 | in_be32(bitbang->dat); | |
48257c4f PA |
103 | } |
104 | ||
2b5b3a60 SW |
105 | static struct mdiobb_ops bb_ops = { |
106 | .owner = THIS_MODULE, | |
107 | .set_mdc = mdc, | |
108 | .set_mdio_dir = mdio_dir, | |
109 | .set_mdio_data = mdio, | |
110 | .get_mdio_data = mdio_read, | |
111 | }; | |
5b4b8454 | 112 | |
976de6a8 SW |
113 | #ifdef CONFIG_PPC_CPM_NEW_BINDING |
114 | static int __devinit fs_mii_bitbang_init(struct mii_bus *bus, | |
115 | struct device_node *np) | |
48257c4f | 116 | { |
976de6a8 SW |
117 | struct resource res; |
118 | const u32 *data; | |
119 | int mdio_pin, mdc_pin, len; | |
120 | struct bb_info *bitbang = bus->priv; | |
48257c4f | 121 | |
976de6a8 SW |
122 | int ret = of_address_to_resource(np, 0, &res); |
123 | if (ret) | |
124 | return ret; | |
125 | ||
126 | if (res.end - res.start < 13) | |
127 | return -ENODEV; | |
128 | ||
129 | /* This should really encode the pin number as well, but all | |
130 | * we get is an int, and the odds of multiple bitbang mdio buses | |
131 | * is low enough that it's not worth going too crazy. | |
132 | */ | |
133 | bus->id = res.start; | |
134 | ||
135 | data = of_get_property(np, "fsl,mdio-pin", &len); | |
136 | if (!data || len != 4) | |
137 | return -ENODEV; | |
138 | mdio_pin = *data; | |
139 | ||
140 | data = of_get_property(np, "fsl,mdc-pin", &len); | |
141 | if (!data || len != 4) | |
142 | return -ENODEV; | |
143 | mdc_pin = *data; | |
144 | ||
145 | bitbang->dir = ioremap(res.start, res.end - res.start + 1); | |
146 | if (!bitbang->dir) | |
147 | return -ENOMEM; | |
148 | ||
149 | bitbang->dat = bitbang->dir + 4; | |
150 | bitbang->mdio_msk = 1 << (31 - mdio_pin); | |
151 | bitbang->mdc_msk = 1 << (31 - mdc_pin); | |
976de6a8 SW |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
156 | static void __devinit add_phy(struct mii_bus *bus, struct device_node *np) | |
157 | { | |
158 | const u32 *data; | |
159 | int len, id, irq; | |
160 | ||
161 | data = of_get_property(np, "reg", &len); | |
162 | if (!data || len != 4) | |
163 | return; | |
164 | ||
165 | id = *data; | |
166 | bus->phy_mask &= ~(1 << id); | |
5b4b8454 | 167 | |
976de6a8 SW |
168 | irq = of_irq_to_resource(np, 0, NULL); |
169 | if (irq != NO_IRQ) | |
170 | bus->irq[id] = irq; | |
171 | } | |
172 | ||
173 | static int __devinit fs_enet_mdio_probe(struct of_device *ofdev, | |
174 | const struct of_device_id *match) | |
175 | { | |
176 | struct device_node *np = NULL; | |
177 | struct mii_bus *new_bus; | |
178 | struct bb_info *bitbang; | |
179 | int ret = -ENOMEM; | |
180 | int i; | |
181 | ||
976de6a8 SW |
182 | bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL); |
183 | if (!bitbang) | |
2b5b3a60 SW |
184 | goto out; |
185 | ||
186 | bitbang->ctrl.ops = &bb_ops; | |
187 | ||
188 | new_bus = alloc_mdio_bitbang(&bitbang->ctrl); | |
189 | if (!new_bus) | |
190 | goto out_free_priv; | |
976de6a8 | 191 | |
976de6a8 | 192 | new_bus->name = "CPM2 Bitbanged MII", |
976de6a8 SW |
193 | |
194 | ret = fs_mii_bitbang_init(new_bus, ofdev->node); | |
195 | if (ret) | |
2b5b3a60 | 196 | goto out_free_bus; |
976de6a8 SW |
197 | |
198 | new_bus->phy_mask = ~0; | |
199 | new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); | |
200 | if (!new_bus->irq) | |
201 | goto out_unmap_regs; | |
202 | ||
203 | for (i = 0; i < PHY_MAX_ADDR; i++) | |
204 | new_bus->irq[i] = -1; | |
205 | ||
206 | while ((np = of_get_next_child(ofdev->node, np))) | |
207 | if (!strcmp(np->type, "ethernet-phy")) | |
208 | add_phy(new_bus, np); | |
209 | ||
210 | new_bus->dev = &ofdev->dev; | |
211 | dev_set_drvdata(&ofdev->dev, new_bus); | |
212 | ||
213 | ret = mdiobus_register(new_bus); | |
214 | if (ret) | |
215 | goto out_free_irqs; | |
216 | ||
217 | return 0; | |
218 | ||
219 | out_free_irqs: | |
220 | dev_set_drvdata(&ofdev->dev, NULL); | |
221 | kfree(new_bus->irq); | |
222 | out_unmap_regs: | |
223 | iounmap(bitbang->dir); | |
976de6a8 SW |
224 | out_free_bus: |
225 | kfree(new_bus); | |
2b5b3a60 SW |
226 | out_free_priv: |
227 | free_mdio_bitbang(new_bus); | |
976de6a8 SW |
228 | out: |
229 | return ret; | |
230 | } | |
231 | ||
232 | static int fs_enet_mdio_remove(struct of_device *ofdev) | |
233 | { | |
234 | struct mii_bus *bus = dev_get_drvdata(&ofdev->dev); | |
235 | struct bb_info *bitbang = bus->priv; | |
236 | ||
237 | mdiobus_unregister(bus); | |
2b5b3a60 | 238 | free_mdio_bitbang(bus); |
976de6a8 SW |
239 | dev_set_drvdata(&ofdev->dev, NULL); |
240 | kfree(bus->irq); | |
241 | iounmap(bitbang->dir); | |
242 | kfree(bitbang); | |
243 | kfree(bus); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | static struct of_device_id fs_enet_mdio_bb_match[] = { | |
249 | { | |
250 | .compatible = "fsl,cpm2-mdio-bitbang", | |
251 | }, | |
252 | {}, | |
253 | }; | |
254 | ||
255 | static struct of_platform_driver fs_enet_bb_mdio_driver = { | |
256 | .name = "fsl-bb-mdio", | |
257 | .match_table = fs_enet_mdio_bb_match, | |
258 | .probe = fs_enet_mdio_probe, | |
259 | .remove = fs_enet_mdio_remove, | |
260 | }; | |
261 | ||
2b5b3a60 | 262 | static int fs_enet_mdio_bb_init(void) |
976de6a8 SW |
263 | { |
264 | return of_register_platform_driver(&fs_enet_bb_mdio_driver); | |
265 | } | |
266 | ||
2b5b3a60 | 267 | static void fs_enet_mdio_bb_exit(void) |
976de6a8 SW |
268 | { |
269 | of_unregister_platform_driver(&fs_enet_bb_mdio_driver); | |
270 | } | |
271 | ||
272 | module_init(fs_enet_mdio_bb_init); | |
273 | module_exit(fs_enet_mdio_bb_exit); | |
274 | #else | |
275 | static int __devinit fs_mii_bitbang_init(struct bb_info *bitbang, | |
276 | struct fs_mii_bb_platform_info *fmpi) | |
277 | { | |
278 | bitbang->dir = (u32 __iomem *)fmpi->mdio_dir.offset; | |
279 | bitbang->dat = (u32 __iomem *)fmpi->mdio_dat.offset; | |
280 | bitbang->mdio_msk = 1U << (31 - fmpi->mdio_dat.bit); | |
281 | bitbang->mdc_msk = 1U << (31 - fmpi->mdc_dat.bit); | |
48257c4f PA |
282 | |
283 | return 0; | |
284 | } | |
5b4b8454 | 285 | |
5b4b8454 VB |
286 | static int __devinit fs_enet_mdio_probe(struct device *dev) |
287 | { | |
288 | struct platform_device *pdev = to_platform_device(dev); | |
289 | struct fs_mii_bb_platform_info *pdata; | |
290 | struct mii_bus *new_bus; | |
291 | struct bb_info *bitbang; | |
292 | int err = 0; | |
293 | ||
294 | if (NULL == dev) | |
295 | return -EINVAL; | |
296 | ||
2b5b3a60 | 297 | bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL); |
5b4b8454 | 298 | |
2b5b3a60 | 299 | if (NULL == bitbang) |
5b4b8454 VB |
300 | return -ENOMEM; |
301 | ||
2b5b3a60 | 302 | bitbang->ctrl.ops = &bb_ops; |
5b4b8454 | 303 | |
2b5b3a60 SW |
304 | new_bus = alloc_mdio_bitbang(&bitbang->ctrl); |
305 | ||
306 | if (NULL == new_bus) | |
5b4b8454 VB |
307 | return -ENOMEM; |
308 | ||
309 | new_bus->name = "BB MII Bus", | |
5b4b8454 VB |
310 | new_bus->id = pdev->id; |
311 | ||
312 | new_bus->phy_mask = ~0x9; | |
313 | pdata = (struct fs_mii_bb_platform_info *)pdev->dev.platform_data; | |
314 | ||
315 | if (NULL == pdata) { | |
316 | printk(KERN_ERR "gfar mdio %d: Missing platform data!\n", pdev->id); | |
317 | return -ENODEV; | |
318 | } | |
319 | ||
320 | /*set up workspace*/ | |
321 | fs_mii_bitbang_init(bitbang, pdata); | |
322 | ||
323 | new_bus->priv = bitbang; | |
324 | ||
325 | new_bus->irq = pdata->irq; | |
326 | ||
327 | new_bus->dev = dev; | |
328 | dev_set_drvdata(dev, new_bus); | |
329 | ||
330 | err = mdiobus_register(new_bus); | |
331 | ||
332 | if (0 != err) { | |
333 | printk (KERN_ERR "%s: Cannot register as MDIO bus\n", | |
334 | new_bus->name); | |
335 | goto bus_register_fail; | |
336 | } | |
337 | ||
338 | return 0; | |
339 | ||
340 | bus_register_fail: | |
2b5b3a60 | 341 | free_mdio_bitbang(new_bus); |
5b4b8454 | 342 | kfree(bitbang); |
5b4b8454 VB |
343 | |
344 | return err; | |
345 | } | |
346 | ||
5b4b8454 VB |
347 | static int fs_enet_mdio_remove(struct device *dev) |
348 | { | |
349 | struct mii_bus *bus = dev_get_drvdata(dev); | |
350 | ||
351 | mdiobus_unregister(bus); | |
352 | ||
353 | dev_set_drvdata(dev, NULL); | |
354 | ||
2b5b3a60 | 355 | free_mdio_bitbang(bus); |
5b4b8454 VB |
356 | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static struct device_driver fs_enet_bb_mdio_driver = { | |
361 | .name = "fsl-bb-mdio", | |
362 | .bus = &platform_bus_type, | |
363 | .probe = fs_enet_mdio_probe, | |
364 | .remove = fs_enet_mdio_remove, | |
365 | }; | |
366 | ||
367 | int fs_enet_mdio_bb_init(void) | |
368 | { | |
369 | return driver_register(&fs_enet_bb_mdio_driver); | |
370 | } | |
371 | ||
372 | void fs_enet_mdio_bb_exit(void) | |
373 | { | |
374 | driver_unregister(&fs_enet_bb_mdio_driver); | |
375 | } | |
2b5b3a60 | 376 | #endif |