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/cdefs.h>
22 #include <sys/param.h>
23 #include <sys/lock.h>
24 #include <sys/mutex.h>
25 #include <sys/mbuf.h>
26 #include <sys/kernel.h>
27 #include <sys/socket.h>
28 #include <sys/systm.h>
29 #include <sys/malloc.h>
30 #include <sys/queue.h>
31 #include <sys/taskqueue.h>
32 #include <sys/bus.h>
33 #include <sys/endian.h>
34
35 #include <net/if.h>
36 #include <net/ethernet.h>
37 #include <net/if_media.h>
38
39 #include <net80211/ieee80211_var.h>
40 #include <net80211/ieee80211_radiotap.h>
41
42 #include <dev/usb/usb.h>
43 #include <dev/usb/usbdi.h>
44
45 #include <dev/rtwn/if_rtwnvar.h>
46 #include <dev/rtwn/if_rtwn_debug.h>
47
48 #include <dev/rtwn/usb/rtwn_usb_var.h>
49 #include <dev/rtwn/usb/rtwn_usb_reg.h>
50
51 static int rtwn_do_request(struct rtwn_softc *,
52 struct usb_device_request *, void *);
53 static int rtwn_usb_read_region_1(struct rtwn_softc *,
54 uint16_t, uint8_t *, int);
55
56 /* USB Requests. */
57 #define R92C_REQ_REGS 0x05
58
59 static int
rtwn_do_request(struct rtwn_softc * sc,struct usb_device_request * req,void * data)60 rtwn_do_request(struct rtwn_softc *sc, struct usb_device_request *req,
61 void *data)
62 {
63 struct rtwn_usb_softc *uc = RTWN_USB_SOFTC(sc);
64 usb_error_t err;
65 int ntries = 10;
66
67 RTWN_ASSERT_LOCKED(sc);
68
69 while (ntries--) {
70 err = usbd_do_request_flags(uc->uc_udev, &sc->sc_mtx,
71 req, data, 0, NULL, 250 /* ms */);
72 if (err == USB_ERR_NORMAL_COMPLETION)
73 return (0);
74
75 RTWN_DPRINTF(sc, RTWN_DEBUG_USB,
76 "%s: control request failed, %s (retries left: %d)\n",
77 __func__, usbd_errstr(err), ntries);
78 if (err == USB_ERR_NOT_CONFIGURED)
79 return (ENXIO);
80
81 usb_pause_mtx(&sc->sc_mtx, hz / 100);
82 }
83 return (EIO);
84 }
85
86 /* export for rtwn_fw_write_block() */
87 int
rtwn_usb_write_region_1(struct rtwn_softc * sc,uint16_t addr,uint8_t * buf,int len)88 rtwn_usb_write_region_1(struct rtwn_softc *sc, uint16_t addr, uint8_t *buf,
89 int len)
90 {
91 usb_device_request_t req;
92
93 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
94 req.bRequest = R92C_REQ_REGS;
95 USETW(req.wValue, addr);
96 USETW(req.wIndex, 0);
97 USETW(req.wLength, len);
98 return (rtwn_do_request(sc, &req, buf));
99 }
100
101 int
rtwn_usb_write_1(struct rtwn_softc * sc,uint16_t addr,uint8_t val)102 rtwn_usb_write_1(struct rtwn_softc *sc, uint16_t addr, uint8_t val)
103 {
104 return (rtwn_usb_write_region_1(sc, addr, &val, sizeof(val)));
105 }
106
107 int
rtwn_usb_write_2(struct rtwn_softc * sc,uint16_t addr,uint16_t val)108 rtwn_usb_write_2(struct rtwn_softc *sc, uint16_t addr, uint16_t val)
109 {
110 val = htole16(val);
111 return (rtwn_usb_write_region_1(sc, addr, (uint8_t *)&val, sizeof(val)));
112 }
113
114 int
rtwn_usb_write_4(struct rtwn_softc * sc,uint16_t addr,uint32_t val)115 rtwn_usb_write_4(struct rtwn_softc *sc, uint16_t addr, uint32_t val)
116 {
117 val = htole32(val);
118 return (rtwn_usb_write_region_1(sc, addr, (uint8_t *)&val, sizeof(val)));
119 }
120
121 static int
rtwn_usb_read_region_1(struct rtwn_softc * sc,uint16_t addr,uint8_t * buf,int len)122 rtwn_usb_read_region_1(struct rtwn_softc *sc, uint16_t addr, uint8_t *buf,
123 int len)
124 {
125 usb_device_request_t req;
126
127 req.bmRequestType = UT_READ_VENDOR_DEVICE;
128 req.bRequest = R92C_REQ_REGS;
129 USETW(req.wValue, addr);
130 USETW(req.wIndex, 0);
131 USETW(req.wLength, len);
132 return (rtwn_do_request(sc, &req, buf));
133 }
134
135 uint8_t
rtwn_usb_read_1(struct rtwn_softc * sc,uint16_t addr)136 rtwn_usb_read_1(struct rtwn_softc *sc, uint16_t addr)
137 {
138 uint8_t val;
139
140 if (rtwn_usb_read_region_1(sc, addr, &val, 1) != 0)
141 return (0xff);
142 return (val);
143 }
144
145 uint16_t
rtwn_usb_read_2(struct rtwn_softc * sc,uint16_t addr)146 rtwn_usb_read_2(struct rtwn_softc *sc, uint16_t addr)
147 {
148 uint16_t val;
149
150 if (rtwn_usb_read_region_1(sc, addr, (uint8_t *)&val, 2) != 0)
151 return (0xffff);
152 return (le16toh(val));
153 }
154
155 uint32_t
rtwn_usb_read_4(struct rtwn_softc * sc,uint16_t addr)156 rtwn_usb_read_4(struct rtwn_softc *sc, uint16_t addr)
157 {
158 uint32_t val;
159
160 if (rtwn_usb_read_region_1(sc, addr, (uint8_t *)&val, 4) != 0)
161 return (0xffffffff);
162 return (le32toh(val));
163 }
164
165 void
rtwn_usb_delay(struct rtwn_softc * sc,int usec)166 rtwn_usb_delay(struct rtwn_softc *sc, int usec)
167 {
168
169 /* 1ms delay as default is too big. */
170 if (usec < 1000)
171 DELAY(usec);
172 else
173 usb_pause_mtx(&sc->sc_mtx, msecs_to_ticks(usec / 1000));
174 }
175