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_mdio.h>
15 #include <linux/of_net.h>
16 #include "bgmac.h"
17
bgmac_is_bcm4707_family(struct bcma_device * core)18 static inline bool bgmac_is_bcm4707_family(struct bcma_device *core)
19 {
20 switch (core->bus->chipinfo.id) {
21 case BCMA_CHIP_ID_BCM4707:
22 case BCMA_CHIP_ID_BCM47094:
23 case BCMA_CHIP_ID_BCM53018:
24 return true;
25 default:
26 return false;
27 }
28 }
29
30 /**************************************************
31 * BCMA bus ops
32 **************************************************/
33
bcma_bgmac_read(struct bgmac * bgmac,u16 offset)34 static u32 bcma_bgmac_read(struct bgmac *bgmac, u16 offset)
35 {
36 return bcma_read32(bgmac->bcma.core, offset);
37 }
38
bcma_bgmac_write(struct bgmac * bgmac,u16 offset,u32 value)39 static void bcma_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
40 {
41 bcma_write32(bgmac->bcma.core, offset, value);
42 }
43
bcma_bgmac_idm_read(struct bgmac * bgmac,u16 offset)44 static u32 bcma_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
45 {
46 return bcma_aread32(bgmac->bcma.core, offset);
47 }
48
bcma_bgmac_idm_write(struct bgmac * bgmac,u16 offset,u32 value)49 static void bcma_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
50 {
51 return bcma_awrite32(bgmac->bcma.core, offset, value);
52 }
53
bcma_bgmac_clk_enabled(struct bgmac * bgmac)54 static bool bcma_bgmac_clk_enabled(struct bgmac *bgmac)
55 {
56 return bcma_core_is_enabled(bgmac->bcma.core);
57 }
58
bcma_bgmac_clk_enable(struct bgmac * bgmac,u32 flags)59 static void bcma_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
60 {
61 bcma_core_enable(bgmac->bcma.core, flags);
62 }
63
bcma_bgmac_cco_ctl_maskset(struct bgmac * bgmac,u32 offset,u32 mask,u32 set)64 static void bcma_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
65 u32 mask, u32 set)
66 {
67 struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
68
69 bcma_chipco_chipctl_maskset(cc, offset, mask, set);
70 }
71
bcma_bgmac_get_bus_clock(struct bgmac * bgmac)72 static u32 bcma_bgmac_get_bus_clock(struct bgmac *bgmac)
73 {
74 struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
75
76 return bcma_pmu_get_bus_clock(cc);
77 }
78
bcma_bgmac_cmn_maskset32(struct bgmac * bgmac,u16 offset,u32 mask,u32 set)79 static void bcma_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, u32 mask,
80 u32 set)
81 {
82 bcma_maskset32(bgmac->bcma.cmn, offset, mask, set);
83 }
84
bcma_phy_connect(struct bgmac * bgmac)85 static int bcma_phy_connect(struct bgmac *bgmac)
86 {
87 struct phy_device *phy_dev;
88 char bus_id[MII_BUS_ID_SIZE + 3];
89
90 /* DT info should be the most accurate */
91 phy_dev = of_phy_get_and_connect(bgmac->net_dev, bgmac->dev->of_node,
92 bgmac_adjust_link);
93 if (phy_dev)
94 return 0;
95
96 /* Connect to the PHY */
97 if (bgmac->mii_bus && bgmac->phyaddr != BGMAC_PHY_NOREGS) {
98 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, bgmac->mii_bus->id,
99 bgmac->phyaddr);
100 phy_dev = phy_connect(bgmac->net_dev, bus_id, bgmac_adjust_link,
101 PHY_INTERFACE_MODE_MII);
102 if (IS_ERR(phy_dev)) {
103 dev_err(bgmac->dev, "PHY connection failed\n");
104 return PTR_ERR(phy_dev);
105 }
106
107 return 0;
108 }
109
110 /* Assume a fixed link to the switch port */
111 return bgmac_phy_connect_direct(bgmac);
112 }
113
114 static const struct bcma_device_id bgmac_bcma_tbl[] = {
115 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT,
116 BCMA_ANY_REV, BCMA_ANY_CLASS),
117 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV,
118 BCMA_ANY_CLASS),
119 {},
120 };
121 MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl);
122
123 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
bgmac_probe(struct bcma_device * core)124 static int bgmac_probe(struct bcma_device *core)
125 {
126 struct bcma_chipinfo *ci = &core->bus->chipinfo;
127 struct ssb_sprom *sprom = &core->bus->sprom;
128 struct mii_bus *mii_bus;
129 struct bgmac *bgmac;
130 const u8 *mac;
131 int err;
132
133 bgmac = bgmac_alloc(&core->dev);
134 if (!bgmac)
135 return -ENOMEM;
136
137 bgmac->bcma.core = core;
138 bgmac->dma_dev = core->dma_dev;
139 bgmac->irq = core->irq;
140
141 bcma_set_drvdata(core, bgmac);
142
143 err = of_get_ethdev_address(bgmac->dev->of_node, bgmac->net_dev);
144 if (err == -EPROBE_DEFER)
145 return err;
146
147 /* If no MAC address assigned via device tree, check SPROM */
148 if (err) {
149 switch (core->core_unit) {
150 case 0:
151 mac = sprom->et0mac;
152 break;
153 case 1:
154 mac = sprom->et1mac;
155 break;
156 case 2:
157 mac = sprom->et2mac;
158 break;
159 default:
160 dev_err(bgmac->dev, "Unsupported core_unit %d\n",
161 core->core_unit);
162 err = -ENOTSUPP;
163 goto err;
164 }
165 eth_hw_addr_set(bgmac->net_dev, mac);
166 }
167
168 /* On BCM4706 we need common core to access PHY */
169 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
170 !core->bus->drv_gmac_cmn.core) {
171 dev_err(bgmac->dev, "GMAC CMN core not found (required for BCM4706)\n");
172 err = -ENODEV;
173 goto err;
174 }
175 bgmac->bcma.cmn = core->bus->drv_gmac_cmn.core;
176
177 switch (core->core_unit) {
178 case 0:
179 bgmac->phyaddr = sprom->et0phyaddr;
180 break;
181 case 1:
182 bgmac->phyaddr = sprom->et1phyaddr;
183 break;
184 case 2:
185 bgmac->phyaddr = sprom->et2phyaddr;
186 break;
187 }
188 bgmac->phyaddr &= BGMAC_PHY_MASK;
189 if (bgmac->phyaddr == BGMAC_PHY_MASK) {
190 dev_err(bgmac->dev, "No PHY found\n");
191 err = -ENODEV;
192 goto err;
193 }
194 dev_info(bgmac->dev, "Found PHY addr: %d%s\n", bgmac->phyaddr,
195 bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");
196
197 if (!bgmac_is_bcm4707_family(core) &&
198 !(ci->id == BCMA_CHIP_ID_BCM53573 && core->core_unit == 1)) {
199 struct phy_device *phydev;
200
201 mii_bus = bcma_mdio_mii_register(bgmac);
202 if (IS_ERR(mii_bus)) {
203 err = PTR_ERR(mii_bus);
204 goto err;
205 }
206 bgmac->mii_bus = mii_bus;
207
208 phydev = mdiobus_get_phy(bgmac->mii_bus, bgmac->phyaddr);
209 if (ci->id == BCMA_CHIP_ID_BCM53573 && phydev &&
210 (phydev->drv->phy_id & phydev->drv->phy_id_mask) == PHY_ID_BCM54210E)
211 phydev->dev_flags |= PHY_BRCM_EN_MASTER_MODE;
212 }
213
214 if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
215 dev_err(bgmac->dev, "PCI setup not implemented\n");
216 err = -ENOTSUPP;
217 goto err1;
218 }
219
220 bgmac->has_robosw = !!(sprom->boardflags_lo & BGMAC_BFL_ENETROBO);
221 if (bgmac->has_robosw)
222 dev_warn(bgmac->dev, "Support for Roboswitch not implemented\n");
223
224 if (sprom->boardflags_lo & BGMAC_BFL_ENETADM)
225 dev_warn(bgmac->dev, "Support for ADMtek ethernet switch not implemented\n");
226
227 /* Feature Flags */
228 switch (ci->id) {
229 /* BCM 471X/535X family */
230 case BCMA_CHIP_ID_BCM4716:
231 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
232 fallthrough;
233 case BCMA_CHIP_ID_BCM47162:
234 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL2;
235 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
236 break;
237 case BCMA_CHIP_ID_BCM5357:
238 case BCMA_CHIP_ID_BCM53572:
239 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
240 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
241 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
242 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
243 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM47186) ||
244 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == BCMA_PKG_ID_BCM47188)) {
245 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
246 bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
247 }
248 if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM5358)
249 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_EPHYRMII;
250 break;
251 case BCMA_CHIP_ID_BCM53573:
252 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
253 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
254 if (ci->pkg == BCMA_PKG_ID_BCM47189)
255 bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
256 if (core->core_unit == 0) {
257 bgmac->feature_flags |= BGMAC_FEAT_CC4_IF_SW_TYPE;
258 if (ci->pkg == BCMA_PKG_ID_BCM47189)
259 bgmac->feature_flags |=
260 BGMAC_FEAT_CC4_IF_SW_TYPE_RGMII;
261 } else if (core->core_unit == 1) {
262 bgmac->feature_flags |= BGMAC_FEAT_IRQ_ID_OOB_6;
263 bgmac->feature_flags |= BGMAC_FEAT_CC7_IF_TYPE_RGMII;
264 }
265 break;
266 case BCMA_CHIP_ID_BCM4749:
267 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
268 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
269 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
270 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
271 if (ci->pkg == 10) {
272 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
273 bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
274 }
275 break;
276 /* bcm4707_family */
277 case BCMA_CHIP_ID_BCM4707:
278 case BCMA_CHIP_ID_BCM47094:
279 case BCMA_CHIP_ID_BCM53018:
280 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
281 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
282 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
283 break;
284 default:
285 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
286 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
287 }
288
289 if (!bgmac_is_bcm4707_family(core) && core->id.rev > 2)
290 bgmac->feature_flags |= BGMAC_FEAT_MISC_PLL_REQ;
291
292 if (core->id.id == BCMA_CORE_4706_MAC_GBIT) {
293 bgmac->feature_flags |= BGMAC_FEAT_CMN_PHY_CTL;
294 bgmac->feature_flags |= BGMAC_FEAT_NO_CLR_MIB;
295 }
296
297 if (core->id.rev >= 4) {
298 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
299 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
300 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
301 }
302
303 bgmac->read = bcma_bgmac_read;
304 bgmac->write = bcma_bgmac_write;
305 bgmac->idm_read = bcma_bgmac_idm_read;
306 bgmac->idm_write = bcma_bgmac_idm_write;
307 bgmac->clk_enabled = bcma_bgmac_clk_enabled;
308 bgmac->clk_enable = bcma_bgmac_clk_enable;
309 bgmac->cco_ctl_maskset = bcma_bgmac_cco_ctl_maskset;
310 bgmac->get_bus_clock = bcma_bgmac_get_bus_clock;
311 bgmac->cmn_maskset32 = bcma_bgmac_cmn_maskset32;
312 bgmac->phy_connect = bcma_phy_connect;
313
314 err = bgmac_enet_probe(bgmac);
315 if (err)
316 goto err1;
317
318 return 0;
319
320 err1:
321 bcma_mdio_mii_unregister(bgmac->mii_bus);
322 err:
323 bcma_set_drvdata(core, NULL);
324
325 return err;
326 }
327
bgmac_remove(struct bcma_device * core)328 static void bgmac_remove(struct bcma_device *core)
329 {
330 struct bgmac *bgmac = bcma_get_drvdata(core);
331
332 bcma_mdio_mii_unregister(bgmac->mii_bus);
333 bgmac_enet_remove(bgmac);
334 bcma_set_drvdata(core, NULL);
335 }
336
337 static struct bcma_driver bgmac_bcma_driver = {
338 .name = KBUILD_MODNAME,
339 .id_table = bgmac_bcma_tbl,
340 .probe = bgmac_probe,
341 .remove = bgmac_remove,
342 };
343
bgmac_init(void)344 static int __init bgmac_init(void)
345 {
346 int err;
347
348 err = bcma_driver_register(&bgmac_bcma_driver);
349 if (err)
350 return err;
351 pr_info("Broadcom 47xx GBit MAC driver loaded\n");
352
353 return 0;
354 }
355
bgmac_exit(void)356 static void __exit bgmac_exit(void)
357 {
358 bcma_driver_unregister(&bgmac_bcma_driver);
359 }
360
361 module_init(bgmac_init)
362 module_exit(bgmac_exit)
363
364 MODULE_AUTHOR("Rafał Miłecki");
365 MODULE_DESCRIPTION("Broadcom iProc GBit BCMA interface driver");
366 MODULE_LICENSE("GPL");
367