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 __FBSDID("$FreeBSD$"); 23 24 #include <sys/param.h> 25 #include <sys/lock.h> 26 #include <sys/mutex.h> 27 #include <sys/mbuf.h> 28 #include <sys/kernel.h> 29 #include <sys/socket.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/queue.h> 33 #include <sys/taskqueue.h> 34 #include <sys/bus.h> 35 #include <sys/endian.h> 36 37 #include <net/if.h> 38 #include <net/ethernet.h> 39 #include <net/if_media.h> 40 41 #include <net80211/ieee80211_var.h> 42 #include <net80211/ieee80211_radiotap.h> 43 44 #include <dev/usb/usb.h> 45 #include <dev/usb/usbdi.h> 46 47 #include <dev/rtwn/if_rtwnvar.h> 48 #include <dev/rtwn/if_rtwn_debug.h> 49 50 #include <dev/rtwn/usb/rtwn_usb_var.h> 51 #include <dev/rtwn/usb/rtwn_usb_reg.h> 52 53 static int rtwn_do_request(struct rtwn_softc *, 54 struct usb_device_request *, void *); 55 static int rtwn_usb_read_region_1(struct rtwn_softc *, 56 uint16_t, uint8_t *, int); 57 58 /* USB Requests. */ 59 #define R92C_REQ_REGS 0x05 60 61 static int 62 rtwn_do_request(struct rtwn_softc *sc, struct usb_device_request *req, 63 void *data) 64 { 65 struct rtwn_usb_softc *uc = RTWN_USB_SOFTC(sc); 66 usb_error_t err; 67 int ntries = 10; 68 69 RTWN_ASSERT_LOCKED(sc); 70 71 while (ntries--) { 72 err = usbd_do_request_flags(uc->uc_udev, &sc->sc_mtx, 73 req, data, 0, NULL, 250 /* ms */); 74 if (err == USB_ERR_NORMAL_COMPLETION) 75 return (0); 76 77 RTWN_DPRINTF(sc, RTWN_DEBUG_USB, 78 "%s: control request failed, %s (retries left: %d)\n", 79 __func__, usbd_errstr(err), ntries); 80 if (err == USB_ERR_NOT_CONFIGURED) 81 return (ENXIO); 82 83 usb_pause_mtx(&sc->sc_mtx, hz / 100); 84 } 85 return (EIO); 86 } 87 88 /* export for rtwn_fw_write_block() */ 89 int 90 rtwn_usb_write_region_1(struct rtwn_softc *sc, uint16_t addr, uint8_t *buf, 91 int len) 92 { 93 usb_device_request_t req; 94 95 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 96 req.bRequest = R92C_REQ_REGS; 97 USETW(req.wValue, addr); 98 USETW(req.wIndex, 0); 99 USETW(req.wLength, len); 100 return (rtwn_do_request(sc, &req, buf)); 101 } 102 103 int 104 rtwn_usb_write_1(struct rtwn_softc *sc, uint16_t addr, uint8_t val) 105 { 106 return (rtwn_usb_write_region_1(sc, addr, &val, sizeof(val))); 107 } 108 109 int 110 rtwn_usb_write_2(struct rtwn_softc *sc, uint16_t addr, uint16_t val) 111 { 112 val = htole16(val); 113 return (rtwn_usb_write_region_1(sc, addr, (uint8_t *)&val, sizeof(val))); 114 } 115 116 int 117 rtwn_usb_write_4(struct rtwn_softc *sc, uint16_t addr, uint32_t val) 118 { 119 val = htole32(val); 120 return (rtwn_usb_write_region_1(sc, addr, (uint8_t *)&val, sizeof(val))); 121 } 122 123 static int 124 rtwn_usb_read_region_1(struct rtwn_softc *sc, uint16_t addr, uint8_t *buf, 125 int len) 126 { 127 usb_device_request_t req; 128 129 req.bmRequestType = UT_READ_VENDOR_DEVICE; 130 req.bRequest = R92C_REQ_REGS; 131 USETW(req.wValue, addr); 132 USETW(req.wIndex, 0); 133 USETW(req.wLength, len); 134 return (rtwn_do_request(sc, &req, buf)); 135 } 136 137 uint8_t 138 rtwn_usb_read_1(struct rtwn_softc *sc, uint16_t addr) 139 { 140 uint8_t val; 141 142 if (rtwn_usb_read_region_1(sc, addr, &val, 1) != 0) 143 return (0xff); 144 return (val); 145 } 146 147 uint16_t 148 rtwn_usb_read_2(struct rtwn_softc *sc, uint16_t addr) 149 { 150 uint16_t val; 151 152 if (rtwn_usb_read_region_1(sc, addr, (uint8_t *)&val, 2) != 0) 153 return (0xffff); 154 return (le16toh(val)); 155 } 156 157 uint32_t 158 rtwn_usb_read_4(struct rtwn_softc *sc, uint16_t addr) 159 { 160 uint32_t val; 161 162 if (rtwn_usb_read_region_1(sc, addr, (uint8_t *)&val, 4) != 0) 163 return (0xffffffff); 164 return (le32toh(val)); 165 } 166 167 void 168 rtwn_usb_delay(struct rtwn_softc *sc, int usec) 169 { 170 171 /* 1ms delay as default is too big. */ 172 if (usec < 1000) 173 DELAY(usec); 174 else 175 usb_pause_mtx(&sc->sc_mtx, msecs_to_ticks(usec / 1000)); 176 } 177