hdaudio_pci.c revision 1.1
1 /* $NetBSD: hdaudio_pci.c,v 1.1 2015/03/28 14:09:59 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Precedence Technologies Ltd <support (at) precedence.co.uk> 5 * Copyright (c) 2009 Jared D. McNeill <jmcneill (at) invisible.ca> 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Precedence Technologies Ltd 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Intel High Definition Audio (Revision 1.0a) device driver. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: hdaudio_pci.c,v 1.1 2015/03/28 14:09:59 jmcneill Exp $"); 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/conf.h> 44 #include <sys/bus.h> 45 #include <sys/intr.h> 46 #include <sys/module.h> 47 48 #include <dev/pci/pcidevs.h> 49 #include <dev/pci/pcivar.h> 50 51 #include <dev/hdaudio/hdaudioreg.h> 52 #include <dev/hdaudio/hdaudiovar.h> 53 #include <dev/pci/hdaudio_pci.h> 54 55 struct hdaudio_pci_softc { 56 struct hdaudio_softc sc_hdaudio; /* must be first */ 57 pcitag_t sc_tag; 58 pci_chipset_tag_t sc_pc; 59 void *sc_ih; 60 pcireg_t sc_id; 61 }; 62 63 static int hdaudio_pci_match(device_t, cfdata_t, void *); 64 static void hdaudio_pci_attach(device_t, device_t, void *); 65 static int hdaudio_pci_detach(device_t, int); 66 static int hdaudio_pci_rescan(device_t, const char *, const int *); 67 static void hdaudio_pci_childdet(device_t, device_t); 68 69 static int hdaudio_pci_intr(void *); 70 static void hdaudio_pci_reinit(struct hdaudio_pci_softc *); 71 72 /* power management */ 73 static bool hdaudio_pci_resume(device_t, const pmf_qual_t *); 74 75 CFATTACH_DECL2_NEW( 76 hdaudio_pci, 77 sizeof(struct hdaudio_pci_softc), 78 hdaudio_pci_match, 79 hdaudio_pci_attach, 80 hdaudio_pci_detach, 81 NULL, 82 hdaudio_pci_rescan, 83 hdaudio_pci_childdet 84 ); 85 86 /* 87 * NetBSD autoconfiguration 88 */ 89 90 static int 91 hdaudio_pci_match(device_t parent, cfdata_t match, void *opaque) 92 { 93 struct pci_attach_args *pa = opaque; 94 95 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_MULTIMEDIA) 96 return 0; 97 if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_MULTIMEDIA_HDAUDIO) 98 return 0; 99 100 return 10; 101 } 102 103 static void 104 hdaudio_pci_attach(device_t parent, device_t self, void *opaque) 105 { 106 struct hdaudio_pci_softc *sc = device_private(self); 107 struct pci_attach_args *pa = opaque; 108 pci_intr_handle_t ih; 109 const char *intrstr; 110 pcireg_t csr; 111 int err; 112 char intrbuf[PCI_INTRSTR_LEN]; 113 114 aprint_naive("\n"); 115 aprint_normal(": HD Audio Controller\n"); 116 117 sc->sc_pc = pa->pa_pc; 118 sc->sc_tag = pa->pa_tag; 119 sc->sc_id = pa->pa_id; 120 121 sc->sc_hdaudio.sc_subsystem = pci_conf_read(sc->sc_pc, sc->sc_tag, 122 PCI_SUBSYS_ID_REG); 123 124 /* Enable busmastering and MMIO access */ 125 csr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG); 126 csr |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_BACKTOBACK_ENABLE; 127 pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, csr); 128 129 /* Map MMIO registers */ 130 err = pci_mapreg_map(pa, HDAUDIO_PCI_AZBARL, PCI_MAPREG_TYPE_MEM, 0, 131 &sc->sc_hdaudio.sc_memt, 132 &sc->sc_hdaudio.sc_memh, 133 &sc->sc_hdaudio.sc_membase, 134 &sc->sc_hdaudio.sc_memsize); 135 if (err) { 136 aprint_error_dev(self, "couldn't map mmio space\n"); 137 return; 138 } 139 sc->sc_hdaudio.sc_memvalid = true; 140 sc->sc_hdaudio.sc_dmat = pa->pa_dmat; 141 142 /* Map interrupt and establish handler */ 143 err = pci_intr_map(pa, &ih); 144 if (err) { 145 aprint_error_dev(self, "couldn't map interrupt\n"); 146 return; 147 } 148 intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf)); 149 sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_AUDIO, 150 hdaudio_pci_intr, sc); 151 if (sc->sc_ih == NULL) { 152 aprint_error_dev(self, "couldn't establish interrupt"); 153 if (intrstr) 154 aprint_error(" at %s", intrstr); 155 aprint_error("\n"); 156 return; 157 } 158 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 159 160 if (!pmf_device_register(self, NULL, hdaudio_pci_resume)) 161 aprint_error_dev(self, "couldn't establish power handler\n"); 162 163 hdaudio_pci_reinit(sc); 164 165 /* Attach bus-independent HD audio layer */ 166 if (hdaudio_attach(self, &sc->sc_hdaudio)) { 167 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 168 sc->sc_ih = NULL; 169 bus_space_unmap(sc->sc_hdaudio.sc_memt, 170 sc->sc_hdaudio.sc_memh, 171 sc->sc_hdaudio.sc_memsize); 172 sc->sc_hdaudio.sc_memvalid = false; 173 csr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG); 174 csr &= ~(PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_BACKTOBACK_ENABLE); 175 pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, csr); 176 } 177 } 178 179 static int 180 hdaudio_pci_rescan(device_t self, const char *ifattr, const int *locs) 181 { 182 struct hdaudio_pci_softc *sc = device_private(self); 183 184 return hdaudio_rescan(&sc->sc_hdaudio, ifattr, locs); 185 } 186 187 void 188 hdaudio_pci_childdet(device_t self, device_t child) 189 { 190 struct hdaudio_pci_softc *sc = device_private(self); 191 192 hdaudio_childdet(&sc->sc_hdaudio, child); 193 } 194 195 static int 196 hdaudio_pci_detach(device_t self, int flags) 197 { 198 struct hdaudio_pci_softc *sc = device_private(self); 199 pcireg_t csr; 200 201 hdaudio_detach(&sc->sc_hdaudio, flags); 202 203 if (sc->sc_ih != NULL) { 204 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 205 sc->sc_ih = NULL; 206 } 207 if (sc->sc_hdaudio.sc_memvalid == true) { 208 bus_space_unmap(sc->sc_hdaudio.sc_memt, 209 sc->sc_hdaudio.sc_memh, 210 sc->sc_hdaudio.sc_memsize); 211 sc->sc_hdaudio.sc_memvalid = false; 212 } 213 214 /* Disable busmastering and MMIO access */ 215 csr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG); 216 csr &= ~(PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_BACKTOBACK_ENABLE); 217 pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, csr); 218 219 pmf_device_deregister(self); 220 221 return 0; 222 } 223 224 static int 225 hdaudio_pci_intr(void *opaque) 226 { 227 struct hdaudio_pci_softc *sc = opaque; 228 229 return hdaudio_intr(&sc->sc_hdaudio); 230 } 231 232 233 static void 234 hdaudio_pci_reinit(struct hdaudio_pci_softc *sc) 235 { 236 pcireg_t val; 237 238 /* stops playback static */ 239 val = pci_conf_read(sc->sc_pc, sc->sc_tag, HDAUDIO_PCI_TCSEL); 240 val &= ~7; 241 val |= 0; 242 pci_conf_write(sc->sc_pc, sc->sc_tag, HDAUDIO_PCI_TCSEL, val); 243 244 switch (PCI_VENDOR(sc->sc_id)) { 245 case PCI_VENDOR_NVIDIA: 246 /* enable snooping */ 247 val = pci_conf_read(sc->sc_pc, sc->sc_tag, 248 HDAUDIO_NV_REG_SNOOP); 249 val &= ~HDAUDIO_NV_SNOOP_MASK; 250 val |= HDAUDIO_NV_SNOOP_ENABLE; 251 pci_conf_write(sc->sc_pc, sc->sc_tag, 252 HDAUDIO_NV_REG_SNOOP, val); 253 break; 254 } 255 } 256 257 static bool 258 hdaudio_pci_resume(device_t self, const pmf_qual_t *qual) 259 { 260 struct hdaudio_pci_softc *sc = device_private(self); 261 262 hdaudio_pci_reinit(sc); 263 return hdaudio_resume(&sc->sc_hdaudio); 264 } 265 266 MODULE(MODULE_CLASS_DRIVER, hdaudio_pci, "hdaudio"); 267 268 #ifdef _MODULE 269 #include "ioconf.c" 270 #endif 271 272 static int 273 hdaudio_pci_modcmd(modcmd_t cmd, void *opaque) 274 { 275 int error = 0; 276 277 switch (cmd) { 278 case MODULE_CMD_INIT: 279 #ifdef _MODULE 280 error = config_init_component(cfdriver_ioconf_hdaudio_pci, 281 cfattach_ioconf_hdaudio_pci, cfdata_ioconf_hdaudio_pci); 282 #endif 283 return error; 284 case MODULE_CMD_FINI: 285 #ifdef _MODULE 286 error = config_fini_component(cfdriver_ioconf_hdaudio_pci, 287 cfattach_ioconf_hdaudio_pci, cfdata_ioconf_hdaudio_pci); 288 #endif 289 return error; 290 default: 291 return ENOTTY; 292 } 293 } 294
Indexes created Thu Oct 02 01:09:59 GMT 2025