1 /* $OpenBSD: if_em_soc.c,v 1.5 2016/01/07 04:37:53 dlg Exp $ */
2
3 /*
4 * Copyright (c) 2009 Dariusz Swiderski <sfires@sfires.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <dev/pci/if_em.h>
20 #include <dev/pci/if_em_hw.h>
21 #include <dev/pci/if_em_soc.h>
22 #include <dev/pci/gcu_var.h>
23 #include <dev/pci/gcu_reg.h>
24
25 #include "gcu.h"
26
27 void em_media_status(struct ifnet *, struct ifmediareq *);
28 int em_media_change(struct ifnet *);
29
30 void *
em_lookup_gcu(struct device * self)31 em_lookup_gcu(struct device *self)
32 {
33 #if NGCU > 0
34 extern struct cfdriver gcu_cd;
35
36 return (device_lookup(&gcu_cd, 0));
37 #else
38 return (NULL);
39 #endif
40 }
41
42 int
em_attach_miibus(struct device * self)43 em_attach_miibus(struct device *self)
44 {
45 return 0;
46 }
47
48 int
gcu_miibus_readreg(struct em_hw * hw,int phy,int reg)49 gcu_miibus_readreg(struct em_hw *hw, int phy, int reg)
50 {
51 struct em_softc *sc = (struct em_softc *)
52 ((struct em_osdep *)hw->back)->dev;
53 struct gcu_softc *gcu = hw->gcu;
54 uint32_t data = 0;
55 uint32_t done = 0;
56 int i = 0;
57
58 if (gcu == 0)
59 return 0;
60
61 /* format the data to be written to MDIO_COMMAND_REG */
62 data |= (reg << MDIO_COMMAND_PHY_REG_OFFSET);
63 data |= (phy << MDIO_COMMAND_PHY_ADDR_OFFSET);
64 data |= MDIO_COMMAND_GO_MASK;
65
66 mtx_enter(&gcu->mdio_mtx);
67 bus_space_write_4(gcu->tag, gcu->handle, MDIO_COMMAND_REG, data);
68
69 while (!done && (i++ < GCU_MAX_ATTEMPTS)) {
70 DELAY(GCU_CMD_DELAY);
71 data = bus_space_read_4(gcu->tag, gcu->handle,
72 MDIO_COMMAND_REG);
73 done = !((data & MDIO_COMMAND_GO_MASK) >>
74 MDIO_COMMAND_GO_OFFSET);
75 }
76 mtx_leave(&gcu->mdio_mtx);
77
78 if (i >= GCU_MAX_ATTEMPTS) {
79 printf("%s: phy read timeout: phy %d, reg %d\n",
80 DEVNAME(sc), phy, reg);
81 return (0);
82 }
83
84 mtx_enter(&gcu->mdio_mtx);
85 data = bus_space_read_4(gcu->tag, gcu->handle, MDIO_STATUS_REG);
86 mtx_leave(&gcu->mdio_mtx);
87
88 if((data & MDIO_STATUS_STATUS_MASK) != 0) {
89 printf("%s: unable to read phy %d reg %d\n",
90 DEVNAME(sc), phy, reg);
91 return (0);
92 }
93 return (uint16_t) (data & MDIO_STATUS_READ_DATA_MASK);
94 }
95
96 void
gcu_miibus_writereg(struct em_hw * hw,int phy,int reg,int val)97 gcu_miibus_writereg(struct em_hw *hw, int phy, int reg, int val)
98 {
99 struct em_softc *sc = (struct em_softc *)
100 ((struct em_osdep *)hw->back)->dev;
101 struct gcu_softc *gcu = hw->gcu;
102 uint32_t data, done = 0;
103 int i = 0;
104
105 if (gcu == 0)
106 return;
107
108 /* format the data to be written to the MDIO_COMMAND_REG */
109 data = val;
110 data |= (reg << MDIO_COMMAND_PHY_REG_OFFSET);
111 data |= (phy << MDIO_COMMAND_PHY_ADDR_OFFSET);
112 data |= MDIO_COMMAND_OPER_MASK | MDIO_COMMAND_GO_MASK;
113
114 mtx_enter(&gcu->mdio_mtx);
115 bus_space_write_4(gcu->tag, gcu->handle, MDIO_COMMAND_REG, data);
116
117 while (!done && (i++ < GCU_MAX_ATTEMPTS)) {
118 DELAY(GCU_CMD_DELAY);
119 data = bus_space_read_4(gcu->tag, gcu->handle,
120 MDIO_COMMAND_REG);
121 done = !((data & MDIO_COMMAND_GO_MASK) >>
122 MDIO_COMMAND_GO_OFFSET);
123 }
124 mtx_leave(&gcu->mdio_mtx);
125
126 if (i >= GCU_MAX_ATTEMPTS) {
127 printf("%s: phy read timeout: phy %d, reg %d\n",
128 DEVNAME(sc), phy, reg);
129 return;
130 }
131 }
132
133 void
gcu_miibus_statchg(struct device * dev)134 gcu_miibus_statchg(struct device *dev)
135 {
136 }
137