2 * Copyright (c) 2015 The FreeBSD Foundation
5 * This software was developed by Semihalf under
6 * the sponsorship of the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/resource.h>
40 #include <sys/socket.h>
41 #include <sys/queue.h>
43 #include <machine/bus.h>
44 #include <machine/resource.h>
47 #include <net/if_media.h>
48 #include <net/if_types.h>
49 #include <net/if_var.h>
51 #include <dev/mii/mii.h>
52 #include <dev/mii/miivar.h>
54 #include "thunder_mdio_var.h"
57 #include "miibus_if.h"
59 #define REG_BASE_RID 0
62 #define SMI_CMD_PHY_REG_ADR_SHIFT (0)
63 #define SMI_CMD_PHY_REG_ADR_MASK (0x1FUL << SMI_CMD_PHY_REG_ADR_SHIFT)
64 #define SMI_CMD_PHY_ADR_SHIFT (8)
65 #define SMI_CMD_PHY_ADR_MASK (0x1FUL << SMI_CMD_PHY_ADR_SHIFT)
66 #define SMI_CMD_PHY_OP_MASK (0x3UL << 16)
67 #define SMI_CMD_PHY_OP_C22_READ (0x1UL << 16)
68 #define SMI_CMD_PHY_OP_C22_WRITE (0x0UL << 16)
69 #define SMI_CMD_PHY_OP_C45_READ (0x3UL << 16)
70 #define SMI_CMD_PHY_OP_C45_WRITE (0x1UL << 16)
71 #define SMI_CMD_PHY_OP_C45_ADDR (0x0UL << 16)
73 #define SMI_WR_DAT 0x08
74 #define SMI_WR_DAT_PENDING (1UL << 17)
75 #define SMI_WR_DAT_VAL (1UL << 16)
76 #define SMI_WR_DAT_DAT_MASK (0xFFFFUL << 0)
78 #define SMI_RD_DAT 0x10
79 #define SMI_RD_DAT_PENDING (1UL << 17)
80 #define SMI_RD_DAT_VAL (1UL << 16)
81 #define SMI_RD_DAT_DAT_MASK (0xFFFFUL << 0)
84 #define SMI_CLK_PREAMBLE (1UL << 12)
85 #define SMI_CLK_MODE (1UL << 24)
88 #define SMI_EN_EN (1UL << 0) /* Enabele interface */
90 #define SMI_DRV_CTL 0x28
92 static int thunder_mdio_detach(device_t);
94 static int thunder_mdio_read(device_t, int, int);
95 static int thunder_mdio_write(device_t, int, int, int);
97 static int thunder_ifmedia_change_stub(struct ifnet *);
98 static void thunder_ifmedia_status_stub(struct ifnet *, struct ifmediareq *);
100 static int thunder_mdio_media_status(device_t, int, int *, int *, int *);
101 static int thunder_mdio_media_change(device_t, int, int, int, int);
102 static int thunder_mdio_phy_connect(device_t, int, int);
103 static int thunder_mdio_phy_disconnect(device_t, int, int);
105 static device_method_t thunder_mdio_methods[] = {
106 /* Device interface */
107 DEVMETHOD(device_detach, thunder_mdio_detach),
109 DEVMETHOD(lmac_media_status, thunder_mdio_media_status),
110 DEVMETHOD(lmac_media_change, thunder_mdio_media_change),
111 DEVMETHOD(lmac_phy_connect, thunder_mdio_phy_connect),
112 DEVMETHOD(lmac_phy_disconnect, thunder_mdio_phy_disconnect),
114 DEVMETHOD(miibus_readreg, thunder_mdio_read),
115 DEVMETHOD(miibus_writereg, thunder_mdio_write),
121 DEFINE_CLASS_0(thunder_mdio, thunder_mdio_driver, thunder_mdio_methods,
122 sizeof(struct thunder_mdio_softc));
124 DRIVER_MODULE(miibus, thunder_mdio, miibus_driver, miibus_devclass, 0, 0);
125 MODULE_DEPEND(thunder_mdio, ether, 1, 1, 1);
126 MODULE_DEPEND(thunder_mdio, miibus, 1, 1, 1);
128 MALLOC_DEFINE(M_THUNDER_MDIO, "ThunderX MDIO",
129 "Cavium ThunderX MDIO dynamic memory");
131 #define MDIO_LOCK_INIT(sc, name) \
132 mtx_init(&(sc)->mtx, name, NULL, MTX_DEF)
134 #define MDIO_LOCK_DESTROY(sc) \
135 mtx_destroy(&(sc)->mtx)
137 #define MDIO_LOCK(sc) mtx_lock(&(sc)->mtx)
138 #define MDIO_UNLOCK(sc) mtx_unlock(&(sc)->mtx)
140 #define MDIO_LOCK_ASSERT(sc) \
141 mtx_assert(&(sc)->mtx, MA_OWNED)
144 #define mdio_reg_read(sc, reg) \
145 bus_read_8((sc)->reg_base, (reg))
147 #define mdio_reg_write(sc, reg, val) \
148 bus_write_8((sc)->reg_base, (reg), (val))
151 thunder_mdio_attach(device_t dev)
153 struct thunder_mdio_softc *sc;
156 sc = device_get_softc(dev);
159 /* Allocate memory resources */
161 sc->reg_base = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
163 if (sc->reg_base == NULL) {
164 device_printf(dev, "Could not allocate memory\n");
168 TAILQ_INIT(&sc->phy_desc_head);
169 MDIO_LOCK_INIT(sc, "ThunderX MDIO lock");
171 /* Enable SMI/MDIO interface */
172 mdio_reg_write(sc, SMI_EN, SMI_EN_EN);
178 thunder_mdio_detach(device_t dev)
180 struct thunder_mdio_softc *sc;
182 sc = device_get_softc(dev);
184 if (sc->reg_base != NULL) {
185 bus_release_resource(dev, SYS_RES_MEMORY, REG_BASE_RID,
193 thunder_mdio_set_mode(struct thunder_mdio_softc *sc,
194 enum thunder_mdio_mode mode)
198 if (sc->mode == mode)
201 /* Set mode, IEEE CLAUSE 22 or IEEE CAUSE 45 */
202 smi_clk = mdio_reg_read(sc, SMI_CLK);
203 if (mode == MODE_IEEE_C22)
204 smi_clk &= ~SMI_CLK_MODE;
206 smi_clk |= SMI_CLK_MODE;
207 /* Enable sending 32 bit preable on SMI transactions */
208 smi_clk |= SMI_CLK_PREAMBLE;
210 mdio_reg_write(sc, SMI_CLK, smi_clk);
215 thunder_mdio_c45_addr(struct thunder_mdio_softc *sc, int phy, int reg)
217 uint64_t smi_cmd, smi_wr_dat;
220 thunder_mdio_set_mode(sc, MODE_IEEE_C45);
222 /* Prepare data for transmission */
223 mdio_reg_write(sc, SMI_WR_DAT, reg & SMI_WR_DAT_DAT_MASK);
229 smi_cmd |= SMI_CMD_PHY_OP_C45_WRITE;
231 /* Set PHY address */
232 smi_cmd |= ((phy << SMI_CMD_PHY_ADR_SHIFT) & SMI_CMD_PHY_ADR_MASK);
233 /* Set PHY register offset */
234 smi_cmd |= ((reg << SMI_CMD_PHY_REG_ADR_SHIFT) &
235 SMI_CMD_PHY_REG_ADR_MASK);
237 mdio_reg_write(sc, SMI_CMD, smi_cmd);
238 for (timeout = 1000; timeout > 0; timeout--) {
239 smi_wr_dat = mdio_reg_read(sc, SMI_WR_DAT);
240 if (smi_wr_dat & SMI_WR_DAT_PENDING)
249 /* Return 0 on success */
255 thunder_mdio_read(device_t dev, int phy, int reg)
257 struct thunder_mdio_softc *sc;
258 uint64_t smi_cmd, smi_rd_dat;
262 sc = device_get_softc(dev);
264 /* XXX Always C22 - for <= 1Gbps only */
265 thunder_mdio_set_mode(sc, MODE_IEEE_C22);
272 if (sc->mode == MODE_IEEE_C22)
273 smi_cmd |= SMI_CMD_PHY_OP_C22_READ;
275 smi_cmd |= SMI_CMD_PHY_OP_C45_READ;
276 err = thunder_mdio_c45_addr(sc, phy, reg);
280 reg = (reg >> 16) & 0x1F;
283 /* Set PHY address */
284 smi_cmd |= ((phy << SMI_CMD_PHY_ADR_SHIFT) & SMI_CMD_PHY_ADR_MASK);
285 /* Set PHY register offset */
286 smi_cmd |= ((reg << SMI_CMD_PHY_REG_ADR_SHIFT) &
287 SMI_CMD_PHY_REG_ADR_MASK);
289 mdio_reg_write(sc, SMI_CMD, smi_cmd);
290 for (timeout = 1000; timeout > 0; timeout--) {
291 smi_rd_dat = mdio_reg_read(sc, SMI_RD_DAT);
292 if (smi_rd_dat & SMI_RD_DAT_PENDING)
298 if (smi_rd_dat & SMI_RD_DAT_VAL)
299 return (smi_rd_dat & SMI_RD_DAT_DAT_MASK);
301 /* Return 0 on error */
307 thunder_mdio_write(device_t dev, int phy, int reg, int data)
309 struct thunder_mdio_softc *sc;
310 uint64_t smi_cmd, smi_wr_dat;
313 sc = device_get_softc(dev);
315 /* XXX Always C22 - for <= 1Gbps only */
316 thunder_mdio_set_mode(sc, MODE_IEEE_C22);
318 /* Prepare data for transmission */
319 mdio_reg_write(sc, SMI_WR_DAT, data & SMI_WR_DAT_DAT_MASK);
325 if (sc->mode == MODE_IEEE_C22)
326 smi_cmd |= SMI_CMD_PHY_OP_C22_WRITE;
328 smi_cmd |= SMI_CMD_PHY_OP_C45_WRITE;
330 /* Set PHY address */
331 smi_cmd |= ((phy << SMI_CMD_PHY_ADR_SHIFT) & SMI_CMD_PHY_ADR_MASK);
332 /* Set PHY register offset */
333 smi_cmd |= ((reg << SMI_CMD_PHY_REG_ADR_SHIFT) &
334 SMI_CMD_PHY_REG_ADR_MASK);
336 mdio_reg_write(sc, SMI_CMD, smi_cmd);
337 for (timeout = 1000; timeout > 0; timeout--) {
338 smi_wr_dat = mdio_reg_read(sc, SMI_WR_DAT);
339 if (smi_wr_dat & SMI_WR_DAT_PENDING)
348 /* Return 0 on success */
354 thunder_ifmedia_change_stub(struct ifnet *ifp __unused)
356 /* Will never be called by if_media */
361 thunder_ifmedia_status_stub(struct ifnet *ifp __unused, struct ifmediareq
364 /* Will never be called by if_media */
367 static __inline struct phy_desc *
368 get_phy_desc(struct thunder_mdio_softc *sc, int lmacid)
370 struct phy_desc *pd = NULL;
372 MDIO_LOCK_ASSERT(sc);
373 TAILQ_FOREACH(pd, &sc->phy_desc_head, phy_desc_list) {
374 if (pd->lmacid == lmacid)
381 thunder_mdio_media_status(device_t dev, int lmacid, int *link, int *duplex,
384 struct thunder_mdio_softc *sc;
385 struct mii_data *mii_sc;
388 sc = device_get_softc(dev);
391 pd = get_phy_desc(sc, lmacid);
393 /* Panic when invariants are enabled, fail otherwise. */
394 KASSERT(0, ("%s: no PHY descriptor for LMAC%d",
399 mii_sc = device_get_softc(pd->miibus);
402 if ((mii_sc->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
403 (IFM_ACTIVE | IFM_AVALID)) {
409 switch (IFM_SUBTYPE(mii_sc->mii_media_active)) {
424 if ((IFM_OPTIONS(mii_sc->mii_media_active) & IFM_FDX) != 0)
435 thunder_mdio_media_change(device_t dev, int lmacid, int link, int duplex,
443 thunder_mdio_phy_connect(device_t dev, int lmacid, int phy)
445 struct thunder_mdio_softc *sc;
449 sc = device_get_softc(dev);
452 pd = get_phy_desc(sc, lmacid);
455 pd = malloc(sizeof(*pd), M_THUNDER_MDIO, (M_NOWAIT | M_ZERO));
458 pd->ifp = if_alloc(IFT_ETHER);
459 if (pd->ifp == NULL) {
460 free(pd, M_THUNDER_MDIO);
466 err = mii_attach(dev, &pd->miibus, pd->ifp,
467 thunder_ifmedia_change_stub, thunder_ifmedia_status_stub,
468 BMSR_DEFCAPMASK, phy, MII_OFFSET_ANY, 0);
471 device_printf(dev, "Could not attach PHY%d\n", phy);
473 free(pd, M_THUNDER_MDIO);
478 TAILQ_INSERT_TAIL(&sc->phy_desc_head, pd, phy_desc_list);
485 thunder_mdio_phy_disconnect(device_t dev, int lmacid, int phy)
487 struct thunder_mdio_softc *sc;
490 sc = device_get_softc(dev);
493 pd = get_phy_desc(sc, lmacid);
499 /* Remove this PHY descriptor from the list */
500 TAILQ_REMOVE(&sc->phy_desc_head, pd, phy_desc_list);
503 bus_generic_detach(dev);
504 device_delete_child(dev, pd->miibus);
505 /* Free fake ifnet */
507 /* Free memory under phy descriptor */
508 free(pd, M_THUNDER_MDIO);