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1/*
2 * Driver for (BCM4706)? GBit MAC core on BCMA bus.
3 *
4 * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
5 *
6 * Licensed under the GNU/GPL. See COPYING for details.
7 */
8
9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11#include <linux/bcma/bcma.h>
12#include <linux/brcmphy.h>
13#include <linux/etherdevice.h>
14#include <linux/of_net.h>
15#include "bgmac.h"
16
17static inline bool bgmac_is_bcm4707_family(struct bcma_device *core)
18{
19 switch (core->bus->chipinfo.id) {
20 case BCMA_CHIP_ID_BCM4707:
21 case BCMA_CHIP_ID_BCM47094:
22 case BCMA_CHIP_ID_BCM53018:
23 return true;
24 default:
25 return false;
26 }
27}
28
29/**************************************************
30 * BCMA bus ops
31 **************************************************/
32
33static u32 bcma_bgmac_read(struct bgmac *bgmac, u16 offset)
34{
35 return bcma_read32(bgmac->bcma.core, offset);
36}
37
38static void bcma_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
39{
40 bcma_write32(bgmac->bcma.core, offset, value);
41}
42
43static u32 bcma_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
44{
45 return bcma_aread32(bgmac->bcma.core, offset);
46}
47
48static void bcma_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
49{
50 return bcma_awrite32(bgmac->bcma.core, offset, value);
51}
52
53static bool bcma_bgmac_clk_enabled(struct bgmac *bgmac)
54{
55 return bcma_core_is_enabled(bgmac->bcma.core);
56}
57
58static void bcma_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
59{
60 bcma_core_enable(bgmac->bcma.core, flags);
61}
62
63static void bcma_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
64 u32 mask, u32 set)
65{
66 struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
67
68 bcma_chipco_chipctl_maskset(cc, offset, mask, set);
69}
70
71static u32 bcma_bgmac_get_bus_clock(struct bgmac *bgmac)
72{
73 struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
74
75 return bcma_pmu_get_bus_clock(cc);
76}
77
78static void bcma_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, u32 mask,
79 u32 set)
80{
81 bcma_maskset32(bgmac->bcma.cmn, offset, mask, set);
82}
83
84static int bcma_phy_connect(struct bgmac *bgmac)
85{
86 struct phy_device *phy_dev;
87 char bus_id[MII_BUS_ID_SIZE + 3];
88
89 /* Connect to the PHY */
90 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, bgmac->mii_bus->id,
91 bgmac->phyaddr);
92 phy_dev = phy_connect(bgmac->net_dev, bus_id, bgmac_adjust_link,
93 PHY_INTERFACE_MODE_MII);
94 if (IS_ERR(phy_dev)) {
95 dev_err(bgmac->dev, "PHY connection failed\n");
96 return PTR_ERR(phy_dev);
97 }
98
99 return 0;
100}
101
102static const struct bcma_device_id bgmac_bcma_tbl[] = {
103 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT,
104 BCMA_ANY_REV, BCMA_ANY_CLASS),
105 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV,
106 BCMA_ANY_CLASS),
107 {},
108};
109MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl);
110
111/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
112static int bgmac_probe(struct bcma_device *core)
113{
114 struct bcma_chipinfo *ci = &core->bus->chipinfo;
115 struct ssb_sprom *sprom = &core->bus->sprom;
116 struct mii_bus *mii_bus;
117 struct bgmac *bgmac;
118 const u8 *mac = NULL;
119 int err;
120
121 bgmac = bgmac_alloc(&core->dev);
122 if (!bgmac)
123 return -ENOMEM;
124
125 bgmac->bcma.core = core;
126 bgmac->dma_dev = core->dma_dev;
127 bgmac->irq = core->irq;
128
129 bcma_set_drvdata(core, bgmac);
130
131 if (bgmac->dev->of_node)
132 mac = of_get_mac_address(bgmac->dev->of_node);
133
134 /* If no MAC address assigned via device tree, check SPROM */
135 if (IS_ERR_OR_NULL(mac)) {
136 switch (core->core_unit) {
137 case 0:
138 mac = sprom->et0mac;
139 break;
140 case 1:
141 mac = sprom->et1mac;
142 break;
143 case 2:
144 mac = sprom->et2mac;
145 break;
146 default:
147 dev_err(bgmac->dev, "Unsupported core_unit %d\n",
148 core->core_unit);
149 err = -ENOTSUPP;
150 goto err;
151 }
152 }
153
154 ether_addr_copy(bgmac->net_dev->dev_addr, mac);
155
156 /* On BCM4706 we need common core to access PHY */
157 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
158 !core->bus->drv_gmac_cmn.core) {
159 dev_err(bgmac->dev, "GMAC CMN core not found (required for BCM4706)\n");
160 err = -ENODEV;
161 goto err;
162 }
163 bgmac->bcma.cmn = core->bus->drv_gmac_cmn.core;
164
165 switch (core->core_unit) {
166 case 0:
167 bgmac->phyaddr = sprom->et0phyaddr;
168 break;
169 case 1:
170 bgmac->phyaddr = sprom->et1phyaddr;
171 break;
172 case 2:
173 bgmac->phyaddr = sprom->et2phyaddr;
174 break;
175 }
176 bgmac->phyaddr &= BGMAC_PHY_MASK;
177 if (bgmac->phyaddr == BGMAC_PHY_MASK) {
178 dev_err(bgmac->dev, "No PHY found\n");
179 err = -ENODEV;
180 goto err;
181 }
182 dev_info(bgmac->dev, "Found PHY addr: %d%s\n", bgmac->phyaddr,
183 bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");
184
185 if (!bgmac_is_bcm4707_family(core) &&
186 !(ci->id == BCMA_CHIP_ID_BCM53573 && core->core_unit == 1)) {
187 struct phy_device *phydev;
188
189 mii_bus = bcma_mdio_mii_register(bgmac);
190 if (IS_ERR(mii_bus)) {
191 err = PTR_ERR(mii_bus);
192 goto err;
193 }
194 bgmac->mii_bus = mii_bus;
195
196 phydev = mdiobus_get_phy(bgmac->mii_bus, bgmac->phyaddr);
197 if (ci->id == BCMA_CHIP_ID_BCM53573 && phydev &&
198 (phydev->drv->phy_id & phydev->drv->phy_id_mask) == PHY_ID_BCM54210E)
199 phydev->dev_flags |= PHY_BRCM_EN_MASTER_MODE;
200 }
201
202 if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
203 dev_err(bgmac->dev, "PCI setup not implemented\n");
204 err = -ENOTSUPP;
205 goto err1;
206 }
207
208 bgmac->has_robosw = !!(sprom->boardflags_lo & BGMAC_BFL_ENETROBO);
209 if (bgmac->has_robosw)
210 dev_warn(bgmac->dev, "Support for Roboswitch not implemented\n");
211
212 if (sprom->boardflags_lo & BGMAC_BFL_ENETADM)
213 dev_warn(bgmac->dev, "Support for ADMtek ethernet switch not implemented\n");
214
215 /* Feature Flags */
216 switch (ci->id) {
217 /* BCM 471X/535X family */
218 case BCMA_CHIP_ID_BCM4716:
219 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
220 fallthrough;
221 case BCMA_CHIP_ID_BCM47162:
222 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL2;
223 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
224 break;
225 case BCMA_CHIP_ID_BCM5357:
226 case BCMA_CHIP_ID_BCM53572:
227 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
228 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
229 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
230 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
231 if (ci->pkg == BCMA_PKG_ID_BCM47188 ||
232 ci->pkg == BCMA_PKG_ID_BCM47186) {
233 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
234 bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
235 }
236 if (ci->pkg == BCMA_PKG_ID_BCM5358)
237 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_EPHYRMII;
238 break;
239 case BCMA_CHIP_ID_BCM53573:
240 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
241 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
242 if (ci->pkg == BCMA_PKG_ID_BCM47189)
243 bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
244 if (core->core_unit == 0) {
245 bgmac->feature_flags |= BGMAC_FEAT_CC4_IF_SW_TYPE;
246 if (ci->pkg == BCMA_PKG_ID_BCM47189)
247 bgmac->feature_flags |=
248 BGMAC_FEAT_CC4_IF_SW_TYPE_RGMII;
249 } else if (core->core_unit == 1) {
250 bgmac->feature_flags |= BGMAC_FEAT_IRQ_ID_OOB_6;
251 bgmac->feature_flags |= BGMAC_FEAT_CC7_IF_TYPE_RGMII;
252 }
253 break;
254 case BCMA_CHIP_ID_BCM4749:
255 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
256 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
257 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
258 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
259 if (ci->pkg == 10) {
260 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
261 bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
262 }
263 break;
264 /* bcm4707_family */
265 case BCMA_CHIP_ID_BCM4707:
266 case BCMA_CHIP_ID_BCM47094:
267 case BCMA_CHIP_ID_BCM53018:
268 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
269 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
270 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
271 break;
272 default:
273 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
274 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
275 }
276
277 if (!bgmac_is_bcm4707_family(core) && core->id.rev > 2)
278 bgmac->feature_flags |= BGMAC_FEAT_MISC_PLL_REQ;
279
280 if (core->id.id == BCMA_CORE_4706_MAC_GBIT) {
281 bgmac->feature_flags |= BGMAC_FEAT_CMN_PHY_CTL;
282 bgmac->feature_flags |= BGMAC_FEAT_NO_CLR_MIB;
283 }
284
285 if (core->id.rev >= 4) {
286 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
287 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
288 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
289 }
290
291 bgmac->read = bcma_bgmac_read;
292 bgmac->write = bcma_bgmac_write;
293 bgmac->idm_read = bcma_bgmac_idm_read;
294 bgmac->idm_write = bcma_bgmac_idm_write;
295 bgmac->clk_enabled = bcma_bgmac_clk_enabled;
296 bgmac->clk_enable = bcma_bgmac_clk_enable;
297 bgmac->cco_ctl_maskset = bcma_bgmac_cco_ctl_maskset;
298 bgmac->get_bus_clock = bcma_bgmac_get_bus_clock;
299 bgmac->cmn_maskset32 = bcma_bgmac_cmn_maskset32;
300 if (bgmac->mii_bus)
301 bgmac->phy_connect = bcma_phy_connect;
302 else
303 bgmac->phy_connect = bgmac_phy_connect_direct;
304
305 err = bgmac_enet_probe(bgmac);
306 if (err)
307 goto err1;
308
309 return 0;
310
311err1:
312 bcma_mdio_mii_unregister(bgmac->mii_bus);
313err:
314 bcma_set_drvdata(core, NULL);
315
316 return err;
317}
318
319static void bgmac_remove(struct bcma_device *core)
320{
321 struct bgmac *bgmac = bcma_get_drvdata(core);
322
323 bcma_mdio_mii_unregister(bgmac->mii_bus);
324 bgmac_enet_remove(bgmac);
325 bcma_set_drvdata(core, NULL);
326 kfree(bgmac);
327}
328
329static struct bcma_driver bgmac_bcma_driver = {
330 .name = KBUILD_MODNAME,
331 .id_table = bgmac_bcma_tbl,
332 .probe = bgmac_probe,
333 .remove = bgmac_remove,
334};
335
336static int __init bgmac_init(void)
337{
338 int err;
339
340 err = bcma_driver_register(&bgmac_bcma_driver);
341 if (err)
342 return err;
343 pr_info("Broadcom 47xx GBit MAC driver loaded\n");
344
345 return 0;
346}
347
348static void __exit bgmac_exit(void)
349{
350 bcma_driver_unregister(&bgmac_bcma_driver);
351}
352
353module_init(bgmac_init)
354module_exit(bgmac_exit)
355
356MODULE_AUTHOR("Rafał Miłecki");
357MODULE_LICENSE("GPL");