1 /* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
2
3 /*-
4 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
5 * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
6 * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21 #include <sys/param.h>
22 #include <sys/lock.h>
23 #include <sys/mutex.h>
24 #include <sys/mbuf.h>
25 #include <sys/kernel.h>
26 #include <sys/socket.h>
27 #include <sys/systm.h>
28 #include <sys/malloc.h>
29 #include <sys/queue.h>
30 #include <sys/taskqueue.h>
31 #include <sys/bus.h>
32 #include <sys/endian.h>
33
34 #include <net/if.h>
35 #include <net/ethernet.h>
36 #include <net/if_media.h>
37
38 #include <net80211/ieee80211_var.h>
39 #include <net80211/ieee80211_radiotap.h>
40
41 #include <dev/usb/usb.h>
42 #include <dev/usb/usbdi.h>
43
44 #include <dev/rtwn/if_rtwnvar.h>
45 #include <dev/rtwn/if_rtwn_debug.h>
46
47 #include <dev/rtwn/usb/rtwn_usb_var.h>
48 #include <dev/rtwn/usb/rtwn_usb_reg.h>
49
50 static int rtwn_do_request(struct rtwn_softc *,
51 struct usb_device_request *, void *);
52 static int rtwn_usb_read_region_1(struct rtwn_softc *,
53 uint16_t, uint8_t *, int);
54
55 /* USB Requests. */
56 #define R92C_REQ_REGS 0x05
57
58 static int
rtwn_do_request(struct rtwn_softc * sc,struct usb_device_request * req,void * data)59 rtwn_do_request(struct rtwn_softc *sc, struct usb_device_request *req,
60 void *data)
61 {
62 struct rtwn_usb_softc *uc = RTWN_USB_SOFTC(sc);
63 usb_error_t err;
64 int ntries = 10;
65
66 RTWN_ASSERT_LOCKED(sc);
67
68 while (ntries--) {
69 err = usbd_do_request_flags(uc->uc_udev, &sc->sc_mtx,
70 req, data, 0, NULL, 250 /* ms */);
71 if (err == USB_ERR_NORMAL_COMPLETION)
72 return (0);
73
74 RTWN_DPRINTF(sc, RTWN_DEBUG_USB,
75 "%s: control request failed, %s (retries left: %d)\n",
76 __func__, usbd_errstr(err), ntries);
77 if (err == USB_ERR_NOT_CONFIGURED)
78 return (ENXIO);
79
80 usb_pause_mtx(&sc->sc_mtx, hz / 100);
81 }
82 return (EIO);
83 }
84
85 /* export for rtwn_fw_write_block() */
86 int
rtwn_usb_write_region_1(struct rtwn_softc * sc,uint16_t addr,uint8_t * buf,int len)87 rtwn_usb_write_region_1(struct rtwn_softc *sc, uint16_t addr, uint8_t *buf,
88 int len)
89 {
90 usb_device_request_t req;
91
92 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
93 req.bRequest = R92C_REQ_REGS;
94 USETW(req.wValue, addr);
95 USETW(req.wIndex, 0);
96 USETW(req.wLength, len);
97 return (rtwn_do_request(sc, &req, buf));
98 }
99
100 int
rtwn_usb_write_1(struct rtwn_softc * sc,uint16_t addr,uint8_t val)101 rtwn_usb_write_1(struct rtwn_softc *sc, uint16_t addr, uint8_t val)
102 {
103 return (rtwn_usb_write_region_1(sc, addr, &val, sizeof(val)));
104 }
105
106 int
rtwn_usb_write_2(struct rtwn_softc * sc,uint16_t addr,uint16_t val)107 rtwn_usb_write_2(struct rtwn_softc *sc, uint16_t addr, uint16_t val)
108 {
109 val = htole16(val);
110 return (rtwn_usb_write_region_1(sc, addr, (uint8_t *)&val, sizeof(val)));
111 }
112
113 int
rtwn_usb_write_4(struct rtwn_softc * sc,uint16_t addr,uint32_t val)114 rtwn_usb_write_4(struct rtwn_softc *sc, uint16_t addr, uint32_t val)
115 {
116 val = htole32(val);
117 return (rtwn_usb_write_region_1(sc, addr, (uint8_t *)&val, sizeof(val)));
118 }
119
120 static int
rtwn_usb_read_region_1(struct rtwn_softc * sc,uint16_t addr,uint8_t * buf,int len)121 rtwn_usb_read_region_1(struct rtwn_softc *sc, uint16_t addr, uint8_t *buf,
122 int len)
123 {
124 usb_device_request_t req;
125
126 req.bmRequestType = UT_READ_VENDOR_DEVICE;
127 req.bRequest = R92C_REQ_REGS;
128 USETW(req.wValue, addr);
129 USETW(req.wIndex, 0);
130 USETW(req.wLength, len);
131 return (rtwn_do_request(sc, &req, buf));
132 }
133
134 uint8_t
rtwn_usb_read_1(struct rtwn_softc * sc,uint16_t addr)135 rtwn_usb_read_1(struct rtwn_softc *sc, uint16_t addr)
136 {
137 uint8_t val;
138
139 if (rtwn_usb_read_region_1(sc, addr, &val, 1) != 0)
140 return (0xff);
141 return (val);
142 }
143
144 uint16_t
rtwn_usb_read_2(struct rtwn_softc * sc,uint16_t addr)145 rtwn_usb_read_2(struct rtwn_softc *sc, uint16_t addr)
146 {
147 uint16_t val;
148
149 if (rtwn_usb_read_region_1(sc, addr, (uint8_t *)&val, 2) != 0)
150 return (0xffff);
151 return (le16toh(val));
152 }
153
154 uint32_t
rtwn_usb_read_4(struct rtwn_softc * sc,uint16_t addr)155 rtwn_usb_read_4(struct rtwn_softc *sc, uint16_t addr)
156 {
157 uint32_t val;
158
159 if (rtwn_usb_read_region_1(sc, addr, (uint8_t *)&val, 4) != 0)
160 return (0xffffffff);
161 return (le32toh(val));
162 }
163
164 void
rtwn_usb_delay(struct rtwn_softc * sc,int usec)165 rtwn_usb_delay(struct rtwn_softc *sc, int usec)
166 {
167
168 /* 1ms delay as default is too big. */
169 if (usec < 1000)
170 DELAY(usec);
171 else
172 usb_pause_mtx(&sc->sc_mtx, msecs_to_ticks(usec / 1000));
173 }
174