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[FreeBSD/releng/9.2.git] / sys / dev / ath / if_ath_ahb.c
1 /*-
2  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3  * Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd
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 /*
35  * AHB bus front-end for the Atheros Wireless LAN controller driver.
36  */
37
38 #include <sys/param.h>
39 #include <sys/systm.h> 
40 #include <sys/module.h>
41 #include <sys/kernel.h>
42 #include <sys/lock.h>
43 #include <sys/mutex.h>
44 #include <sys/errno.h>
45
46 #include <machine/bus.h>
47 #include <machine/resource.h>
48 #include <sys/bus.h>
49 #include <sys/rman.h>
50
51 #include <sys/socket.h>
52  
53 #include <net/if.h>
54 #include <net/if_media.h>
55 #include <net/if_arp.h>
56
57 #include <net80211/ieee80211_var.h>
58
59 #include <dev/ath/if_athvar.h>
60
61 #include <mips/atheros/ar71xxreg.h>
62 #include <mips/atheros/ar91xxreg.h>
63 #include <mips/atheros/ar71xx_cpudef.h>
64
65 /*
66  * bus glue.
67  */
68
69 /* number of 16 bit words */
70 #define ATH_EEPROM_DATA_SIZE    2048
71
72 struct ath_ahb_softc {
73         struct ath_softc        sc_sc;
74         struct resource         *sc_sr;         /* memory resource */
75         struct resource         *sc_irq;        /* irq resource */
76         struct resource         *sc_eeprom;     /* eeprom location */
77         void                    *sc_ih;         /* interrupt handler */
78 };
79
80 #define VENDOR_ATHEROS  0x168c
81 #define AR9130_DEVID    0x000b
82
83 static int
84 ath_ahb_probe(device_t dev)
85 {
86         const char* devname;
87
88         /* Atheros / ar9130 */
89         devname = ath_hal_probe(VENDOR_ATHEROS, AR9130_DEVID);
90
91         if (devname != NULL) {
92                 device_set_desc(dev, devname);
93                 return BUS_PROBE_DEFAULT;
94         }
95         return ENXIO;
96 }
97
98 static int
99 ath_ahb_attach(device_t dev)
100 {
101         struct ath_ahb_softc *psc = device_get_softc(dev);
102         struct ath_softc *sc = &psc->sc_sc;
103         int error = ENXIO;
104         int rid;
105         long eepromaddr;
106         uint8_t *p;
107
108         sc->sc_dev = dev;
109
110         rid = 0;
111         psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
112         if (psc->sc_sr == NULL) {
113                 device_printf(dev, "cannot map register space\n");
114                 goto bad;
115         }
116
117         if (resource_long_value(device_get_name(dev), device_get_unit(dev),
118             "eepromaddr", &eepromaddr) != 0) {
119                 device_printf(dev, "cannot fetch 'eepromaddr' from hints\n");
120                 goto bad0;
121         }
122         rid = 0;
123         device_printf(sc->sc_dev, "eeprom @ %p\n", (void *) eepromaddr);
124         psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, (uintptr_t) eepromaddr,
125           (uintptr_t) eepromaddr + (uintptr_t) ((ATH_EEPROM_DATA_SIZE * 2) - 1), 0, RF_ACTIVE);
126         if (psc->sc_eeprom == NULL) {
127                 device_printf(dev, "cannot map eeprom space\n");
128                 goto bad0;
129         }
130
131         /* XXX uintptr_t is a bandaid for ia64; to be fixed */
132         sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
133         sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
134         /*
135          * Mark device invalid so any interrupts (shared or otherwise)
136          * that arrive before the HAL is setup are discarded.
137          */
138         sc->sc_invalid = 1;
139
140         /* Copy the EEPROM data out */
141         sc->sc_eepromdata = malloc(ATH_EEPROM_DATA_SIZE * 2, M_TEMP, M_NOWAIT | M_ZERO);
142         if (sc->sc_eepromdata == NULL) {
143                 device_printf(dev, "cannot allocate memory for eeprom data\n");
144                 goto bad1;
145         }
146         device_printf(sc->sc_dev, "eeprom data @ %p\n", (void *) rman_get_bushandle(psc->sc_eeprom));
147         /* XXX why doesn't this work? -adrian */
148 #if 0
149         bus_space_read_multi_1(
150             rman_get_bustag(psc->sc_eeprom),
151             rman_get_bushandle(psc->sc_eeprom),
152             0, (u_int8_t *) sc->sc_eepromdata, ATH_EEPROM_DATA_SIZE * 2);
153 #endif
154         p = (void *) rman_get_bushandle(psc->sc_eeprom);
155         memcpy(sc->sc_eepromdata, p, ATH_EEPROM_DATA_SIZE * 2);
156
157         /*
158          * Arrange interrupt line.
159          */
160         rid = 0;
161         psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE|RF_ACTIVE);
162         if (psc->sc_irq == NULL) {
163                 device_printf(dev, "could not map interrupt\n");
164                 goto bad1;
165         }
166         if (bus_setup_intr(dev, psc->sc_irq,
167                            INTR_TYPE_NET | INTR_MPSAFE,
168                            NULL, ath_intr, sc, &psc->sc_ih)) {
169                 device_printf(dev, "could not establish interrupt\n");
170                 goto bad2;
171         }
172
173         /*
174          * Setup DMA descriptor area.
175          */
176         if (bus_dma_tag_create(bus_get_dma_tag(dev),    /* parent */
177                                1, 0,                    /* alignment, bounds */
178                                BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
179                                BUS_SPACE_MAXADDR,       /* highaddr */
180                                NULL, NULL,              /* filter, filterarg */
181                                0x3ffff,                 /* maxsize XXX */
182                                ATH_MAX_SCATTER,         /* nsegments */
183                                0x3ffff,                 /* maxsegsize XXX */
184                                BUS_DMA_ALLOCNOW,        /* flags */
185                                NULL,                    /* lockfunc */
186                                NULL,                    /* lockarg */
187                                &sc->sc_dmat)) {
188                 device_printf(dev, "cannot allocate DMA tag\n");
189                 goto bad3;
190         }
191
192         ATH_LOCK_INIT(sc);
193
194         error = ath_attach(AR9130_DEVID, sc);
195         if (error == 0)                                 /* success */
196                 return 0;
197
198         ATH_LOCK_DESTROY(sc);
199         bus_dma_tag_destroy(sc->sc_dmat);
200 bad3:
201         bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
202 bad2:
203         bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
204 bad1:
205         bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
206 bad0:
207         bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
208 bad:
209         /* XXX?! */
210         if (sc->sc_eepromdata)
211                 free(sc->sc_eepromdata, M_TEMP);
212         return (error);
213 }
214
215 static int
216 ath_ahb_detach(device_t dev)
217 {
218         struct ath_ahb_softc *psc = device_get_softc(dev);
219         struct ath_softc *sc = &psc->sc_sc;
220
221         /* check if device was removed */
222         sc->sc_invalid = !bus_child_present(dev);
223
224         ath_detach(sc);
225
226         bus_generic_detach(dev);
227         bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
228         bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
229
230         bus_dma_tag_destroy(sc->sc_dmat);
231         bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
232         bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
233         /* XXX?! */
234         if (sc->sc_eepromdata)
235                 free(sc->sc_eepromdata, M_TEMP);
236
237         ATH_LOCK_DESTROY(sc);
238
239         return (0);
240 }
241
242 static int
243 ath_ahb_shutdown(device_t dev)
244 {
245         struct ath_ahb_softc *psc = device_get_softc(dev);
246
247         ath_shutdown(&psc->sc_sc);
248         return (0);
249 }
250
251 static int
252 ath_ahb_suspend(device_t dev)
253 {
254         struct ath_ahb_softc *psc = device_get_softc(dev);
255
256         ath_suspend(&psc->sc_sc);
257
258         return (0);
259 }
260
261 static int
262 ath_ahb_resume(device_t dev)
263 {
264         struct ath_ahb_softc *psc = device_get_softc(dev);
265
266         ath_resume(&psc->sc_sc);
267
268         return (0);
269 }
270
271 static device_method_t ath_ahb_methods[] = {
272         /* Device interface */
273         DEVMETHOD(device_probe,         ath_ahb_probe),
274         DEVMETHOD(device_attach,        ath_ahb_attach),
275         DEVMETHOD(device_detach,        ath_ahb_detach),
276         DEVMETHOD(device_shutdown,      ath_ahb_shutdown),
277         DEVMETHOD(device_suspend,       ath_ahb_suspend),
278         DEVMETHOD(device_resume,        ath_ahb_resume),
279
280         { 0,0 }
281 };
282 static driver_t ath_ahb_driver = {
283         "ath",
284         ath_ahb_methods,
285         sizeof (struct ath_ahb_softc)
286 };
287 static  devclass_t ath_devclass;
288 DRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0);
289 MODULE_VERSION(ath, 1);
290 MODULE_DEPEND(ath, wlan, 1, 1, 1);              /* 802.11 media layer */
291 MODULE_DEPEND(ath, if_ath, 1, 1, 1);            /* if_ath driver */