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1 /*-
2  * Copyright (c) 2009-2010 Weongyo Jeong <weongyo@freebsd.org>
3  * Copyright (c) 2016 Adrian Chadd <adrian@freebsd.org>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer,
11  *    without modification.
12  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
13  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
14  *    redistribution must be conditioned upon including a substantially
15  *    similar Disclaimer requirement for further binary redistribution.
16  *
17  * NO WARRANTY
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
21  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
22  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
23  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
26  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28  * THE POSSIBILITY OF SUCH DAMAGES.
29  */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include "opt_bwn.h"
35 #include "opt_wlan.h"
36
37 /*
38  * The Broadcom Wireless LAN controller driver.
39  */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
45 #include <sys/module.h>
46 #include <sys/endian.h>
47 #include <sys/errno.h>
48 #include <sys/firmware.h>
49 #include <sys/lock.h>
50 #include <sys/mutex.h>
51 #include <machine/bus.h>
52 #include <machine/resource.h>
53 #include <sys/bus.h>
54 #include <sys/rman.h>
55 #include <sys/socket.h>
56 #include <sys/sockio.h>
57
58 #include <net/ethernet.h>
59 #include <net/if.h>
60 #include <net/if_var.h>
61 #include <net/if_arp.h>
62 #include <net/if_dl.h>
63 #include <net/if_llc.h>
64 #include <net/if_media.h>
65 #include <net/if_types.h>
66
67 #include <dev/pci/pcivar.h>
68 #include <dev/pci/pcireg.h>
69 #include <dev/siba/siba_ids.h>
70 #include <dev/siba/sibareg.h>
71 #include <dev/siba/sibavar.h>
72
73 #include <net80211/ieee80211_var.h>
74 #include <net80211/ieee80211_radiotap.h>
75 #include <net80211/ieee80211_regdomain.h>
76 #include <net80211/ieee80211_phy.h>
77 #include <net80211/ieee80211_ratectl.h>
78
79 #include <dev/bwn/if_bwnreg.h>
80 #include <dev/bwn/if_bwnvar.h>
81
82 #include <dev/bwn/if_bwn_chipid.h>
83 #include <dev/bwn/if_bwn_debug.h>
84 #include <dev/bwn/if_bwn_misc.h>
85 #include <dev/bwn/if_bwn_phy_common.h>
86
87 void
88 bwn_mac_switch_freq(struct bwn_mac *mac, int spurmode)
89 {
90         struct bwn_softc *sc = mac->mac_sc;
91         uint16_t chip_id = siba_get_chipid(sc->sc_dev);
92
93         if (chip_id == BCMA_CHIP_ID_BCM4331) {
94                 switch (spurmode) {
95                 case 2: /* 168 Mhz: 2^26/168 = 0x61862 */
96                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x1862);
97                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0x6);
98                         break;
99                 case 1: /* 164 Mhz: 2^26/164 = 0x63e70 */
100                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x3e70);
101                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0x6);
102                         break;
103                 default: /* 160 Mhz: 2^26/160 = 0x66666 */
104                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x6666);
105                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0x6);
106                         break;
107                 }
108         } else if (chip_id == BCMA_CHIP_ID_BCM43131 ||
109             chip_id == BCMA_CHIP_ID_BCM43217 ||
110             chip_id == BCMA_CHIP_ID_BCM43222 ||
111             chip_id == BCMA_CHIP_ID_BCM43224 ||
112             chip_id == BCMA_CHIP_ID_BCM43225 ||
113             chip_id == BCMA_CHIP_ID_BCM43227 ||
114             chip_id == BCMA_CHIP_ID_BCM43228) {
115                 switch (spurmode) {
116                 case 2: /* 126 Mhz */
117                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x2082);
118                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0x8);
119                         break;
120                 case 1: /* 123 Mhz */
121                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x5341);
122                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0x8);
123                         break;
124                 default: /* 120 Mhz */
125                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x8889);
126                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0x8);
127                         break;
128                 }
129         } else if (mac->mac_phy.type == BWN_PHYTYPE_LCN) {
130                 switch (spurmode) {
131                 case 1: /* 82 Mhz */
132                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0x7CE0);
133                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0xC);
134                         break;
135                 default: /* 80 Mhz */
136                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_LOW, 0xCCCD);
137                         BWN_WRITE_2(mac, BWN_TSF_CLK_FRAC_HIGH, 0xC);
138                         break;
139                 }
140         }
141 }
142
143 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/BmacPhyClkFgc */
144 void
145 bwn_phy_force_clock(struct bwn_mac *mac, int force)
146 {
147         struct bwn_softc *sc = mac->mac_sc;
148         uint32_t tmp;
149
150         /* XXX Only for N, HT and AC PHYs */
151
152         /* XXX bhnd bus */
153         if (bwn_is_bus_siba(mac)) {
154                         tmp = siba_read_4(sc->sc_dev, SIBA_TGSLOW);
155                 if (force)
156                         tmp |= SIBA_TGSLOW_FGC;
157                 else
158                         tmp &= ~SIBA_TGSLOW_FGC;
159                 siba_write_4(sc->sc_dev, SIBA_TGSLOW, tmp);
160         } else {
161                 BWN_ERRPRINTF(sc, "%s: unknown bus!\n", __func__);
162         }
163 }
164
165 int
166 bwn_radio_wait_value(struct bwn_mac *mac, uint16_t offset, uint16_t mask,
167     uint16_t value, int delay, int timeout)
168 {
169         uint16_t val;
170         int i;
171
172         for (i = 0; i < timeout; i += delay) {
173                 val = BWN_RF_READ(mac, offset);
174                 if ((val & mask) == value)
175                         return (1);
176                 DELAY(delay);
177         }
178         return (0);
179 }
180
181 void
182 bwn_mac_phy_clock_set(struct bwn_mac *mac, int enabled)
183 {
184         struct bwn_softc *sc = mac->mac_sc;
185         uint32_t val;
186
187         /* XXX bhnd bus */
188         if (bwn_is_bus_siba(mac)) {
189                 val = siba_read_4(sc->sc_dev, SIBA_TGSLOW);
190                 if (enabled)
191                             val |= BWN_TGSLOW_MACPHYCLKEN;
192                 else
193                             val &= ~BWN_TGSLOW_MACPHYCLKEN;
194                 siba_write_4(sc->sc_dev, SIBA_TGSLOW, val);
195         } else {
196                 BWN_ERRPRINTF(sc, "%s: unknown bus!\n", __func__);
197         }
198 }
199
200 /* http://bcm-v4.sipsolutions.net/802.11/PHY/BmacCorePllReset */
201 void
202 bwn_wireless_core_phy_pll_reset(struct bwn_mac *mac)
203 {
204         struct bwn_softc *sc = mac->mac_sc;
205
206         /* XXX bhnd bus */
207         if (bwn_is_bus_siba(mac)) {
208                 siba_cc_write32(sc->sc_dev, SIBA_CC_CHIPCTL_ADDR, 0);
209                 siba_cc_mask32(sc->sc_dev, SIBA_CC_CHIPCTL_DATA, ~0x4);
210                 siba_cc_set32(sc->sc_dev, SIBA_CC_CHIPCTL_DATA, 0x4);
211                 siba_cc_mask32(sc->sc_dev, SIBA_CC_CHIPCTL_DATA, ~0x4);
212         } else {
213                 BWN_ERRPRINTF(sc, "%s: unknown bus!\n", __func__);
214         }
215 }