35aae619d7
Atheros AHB (internally) connected MAC. TODO: * verify the interrupt was for us before doing the DDR flush.
376 lines
10 KiB
C
376 lines
10 KiB
C
/*-
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* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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* Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* AHB bus front-end for the Atheros Wireless LAN controller driver.
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*/
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#include "opt_ath.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/errno.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_arp.h>
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#include <net/ethernet.h>
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#include <net80211/ieee80211_var.h>
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#include <dev/ath/if_athvar.h>
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#include <mips/atheros/ar71xxreg.h>
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#include <mips/atheros/ar91xxreg.h>
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#include <mips/atheros/ar71xx_cpudef.h>
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/*
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* bus glue.
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*/
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/* number of 16 bit words */
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#define ATH_EEPROM_DATA_SIZE 2048
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struct ath_ahb_softc {
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struct ath_softc sc_sc;
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struct resource *sc_sr; /* memory resource */
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struct resource *sc_irq; /* irq resource */
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struct resource *sc_eeprom; /* eeprom location */
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void *sc_ih; /* interrupt handler */
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};
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#define VENDOR_ATHEROS 0x168c
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#define AR9130_DEVID 0x000b
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static int
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ath_ahb_probe(device_t dev)
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{
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int vendor_id, device_id;
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const char* devname;
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/*
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* Check if a device/vendor ID is provided in hints.
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*/
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if (resource_int_value(device_get_name(dev), device_get_unit(dev),
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"vendor_id", &vendor_id) != 0) {
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vendor_id = VENDOR_ATHEROS;
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}
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if (resource_int_value(device_get_name(dev), device_get_unit(dev),
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"device_id", &device_id) != 0) {
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device_id = AR9130_DEVID;
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}
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device_printf(dev, "Vendor=0x%04x, Device=0x%04x\n",
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vendor_id & 0xffff,
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device_id & 0xffff);
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/* Attempt to probe */
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devname = ath_hal_probe(vendor_id, device_id);
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if (devname != NULL) {
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device_set_desc(dev, devname);
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return BUS_PROBE_DEFAULT;
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}
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return ENXIO;
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}
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static void
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ath_ahb_intr(void *arg)
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{
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/* XXX TODO: check if its ours! */
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ar71xx_device_flush_ddr(AR71XX_CPU_DDR_FLUSH_WMAC);
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ath_intr(arg);
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}
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static int
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ath_ahb_attach(device_t dev)
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{
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struct ath_ahb_softc *psc = device_get_softc(dev);
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struct ath_softc *sc = &psc->sc_sc;
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int error = ENXIO;
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int rid;
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long eepromaddr;
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int eepromsize;
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uint8_t *p;
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int device_id, vendor_id;
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sc->sc_dev = dev;
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rid = 0;
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psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (psc->sc_sr == NULL) {
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device_printf(dev, "cannot map register space\n");
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goto bad;
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}
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if (resource_long_value(device_get_name(dev), device_get_unit(dev),
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"eepromaddr", &eepromaddr) != 0) {
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device_printf(dev, "cannot fetch 'eepromaddr' from hints\n");
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goto bad0;
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}
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/*
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* The default EEPROM size is 2048 * 16 bit words.
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* Later EEPROM/OTP/flash regions may be quite a bit bigger.
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*/
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if (resource_int_value(device_get_name(dev), device_get_unit(dev),
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"eepromsize", &eepromsize) != 0) {
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eepromsize = ATH_EEPROM_DATA_SIZE * 2;
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}
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rid = 0;
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device_printf(sc->sc_dev, "eeprom @ %p (%d bytes)\n",
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(void *) eepromaddr, eepromsize);
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/*
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* XXX this assumes that the parent device is the nexus
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* and will just pass through requests for all of memory.
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*
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* Later on, when this has to attach off of the actual
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* AHB, this won't work.
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*
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* Ideally this would be done in machdep code in mips/atheros/
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* and it'd expose the EEPROM via the firmware interface,
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* so the ath/ath_ahb drivers can be loaded as modules
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* after boot-time.
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*/
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psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY,
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&rid, (uintptr_t) eepromaddr,
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(uintptr_t) eepromaddr + (uintptr_t) (eepromsize - 1), 0, RF_ACTIVE);
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if (psc->sc_eeprom == NULL) {
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device_printf(dev, "cannot map eeprom space\n");
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goto bad0;
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}
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sc->sc_st = (HAL_BUS_TAG) rman_get_bustag(psc->sc_sr);
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sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
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/*
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* Mark device invalid so any interrupts (shared or otherwise)
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* that arrive before the HAL is setup are discarded.
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*/
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sc->sc_invalid = 1;
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/* Copy the EEPROM data out */
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sc->sc_eepromdata = malloc(eepromsize, M_TEMP, M_NOWAIT | M_ZERO);
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if (sc->sc_eepromdata == NULL) {
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device_printf(dev, "cannot allocate memory for eeprom data\n");
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goto bad1;
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}
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device_printf(sc->sc_dev, "eeprom data @ %p\n", (void *) rman_get_bushandle(psc->sc_eeprom));
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/* XXX why doesn't this work? -adrian */
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#if 0
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bus_space_read_multi_1(
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rman_get_bustag(psc->sc_eeprom),
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rman_get_bushandle(psc->sc_eeprom),
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0, (u_int8_t *) sc->sc_eepromdata, eepromsize);
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#endif
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p = (void *) rman_get_bushandle(psc->sc_eeprom);
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memcpy(sc->sc_eepromdata, p, eepromsize);
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/*
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* Arrange interrupt line.
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*/
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rid = 0;
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psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE|RF_ACTIVE);
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if (psc->sc_irq == NULL) {
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device_printf(dev, "could not map interrupt\n");
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goto bad1;
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}
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if (bus_setup_intr(dev, psc->sc_irq,
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INTR_TYPE_NET | INTR_MPSAFE,
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NULL, ath_ahb_intr, sc, &psc->sc_ih)) {
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device_printf(dev, "could not establish interrupt\n");
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goto bad2;
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}
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/*
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* Setup DMA descriptor area.
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*/
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if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
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1, 0, /* alignment, bounds */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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0x3ffff, /* maxsize XXX */
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ATH_MAX_SCATTER, /* nsegments */
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0x3ffff, /* maxsegsize XXX */
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BUS_DMA_ALLOCNOW, /* flags */
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NULL, /* lockfunc */
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NULL, /* lockarg */
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&sc->sc_dmat)) {
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device_printf(dev, "cannot allocate DMA tag\n");
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goto bad3;
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}
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/*
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* Check if a device/vendor ID is provided in hints.
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*/
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if (resource_int_value(device_get_name(dev), device_get_unit(dev),
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"vendor_id", &vendor_id) != 0) {
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vendor_id = VENDOR_ATHEROS;
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}
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if (resource_int_value(device_get_name(dev), device_get_unit(dev),
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"device_id", &device_id) != 0) {
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device_id = AR9130_DEVID;
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}
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ATH_LOCK_INIT(sc);
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ATH_PCU_LOCK_INIT(sc);
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ATH_RX_LOCK_INIT(sc);
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ATH_TX_LOCK_INIT(sc);
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ATH_TX_IC_LOCK_INIT(sc);
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ATH_TXSTATUS_LOCK_INIT(sc);
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error = ath_attach(device_id, sc);
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if (error == 0) /* success */
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return 0;
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ATH_TXSTATUS_LOCK_DESTROY(sc);
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ATH_RX_LOCK_DESTROY(sc);
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ATH_TX_LOCK_DESTROY(sc);
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ATH_TX_IC_LOCK_DESTROY(sc);
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ATH_PCU_LOCK_DESTROY(sc);
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ATH_LOCK_DESTROY(sc);
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bus_dma_tag_destroy(sc->sc_dmat);
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bad3:
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bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
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bad2:
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bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
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bad1:
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bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
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bad0:
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bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
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bad:
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/* XXX?! */
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if (sc->sc_eepromdata)
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free(sc->sc_eepromdata, M_TEMP);
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return (error);
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}
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static int
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ath_ahb_detach(device_t dev)
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{
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struct ath_ahb_softc *psc = device_get_softc(dev);
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struct ath_softc *sc = &psc->sc_sc;
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/* check if device was removed */
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sc->sc_invalid = !bus_child_present(dev);
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ath_detach(sc);
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bus_generic_detach(dev);
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bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
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bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
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bus_dma_tag_destroy(sc->sc_dmat);
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bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
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bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
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/* XXX?! */
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if (sc->sc_eepromdata)
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free(sc->sc_eepromdata, M_TEMP);
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ATH_TXSTATUS_LOCK_DESTROY(sc);
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ATH_RX_LOCK_DESTROY(sc);
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ATH_TX_LOCK_DESTROY(sc);
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ATH_TX_IC_LOCK_DESTROY(sc);
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ATH_PCU_LOCK_DESTROY(sc);
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ATH_LOCK_DESTROY(sc);
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return (0);
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}
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static int
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ath_ahb_shutdown(device_t dev)
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{
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struct ath_ahb_softc *psc = device_get_softc(dev);
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ath_shutdown(&psc->sc_sc);
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return (0);
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}
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static int
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ath_ahb_suspend(device_t dev)
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{
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struct ath_ahb_softc *psc = device_get_softc(dev);
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ath_suspend(&psc->sc_sc);
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return (0);
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}
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static int
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ath_ahb_resume(device_t dev)
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{
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struct ath_ahb_softc *psc = device_get_softc(dev);
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ath_resume(&psc->sc_sc);
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return (0);
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}
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static device_method_t ath_ahb_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ath_ahb_probe),
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DEVMETHOD(device_attach, ath_ahb_attach),
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DEVMETHOD(device_detach, ath_ahb_detach),
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DEVMETHOD(device_shutdown, ath_ahb_shutdown),
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DEVMETHOD(device_suspend, ath_ahb_suspend),
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DEVMETHOD(device_resume, ath_ahb_resume),
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{ 0,0 }
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};
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static driver_t ath_ahb_driver = {
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"ath",
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ath_ahb_methods,
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sizeof (struct ath_ahb_softc)
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};
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static devclass_t ath_devclass;
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DRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0);
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DRIVER_MODULE(ath, apb, ath_ahb_driver, ath_devclass, 0, 0);
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MODULE_VERSION(ath, 1);
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MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */
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MODULE_DEPEND(ath, if_ath, 1, 1, 1); /* if_ath driver */
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