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Lay some groundwork for having this stuff hang off of AHB rather than

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the CPU nexus.

* Add ahb as a possible bus attachment
* Lay a comment down to remind me or whoever else ends up trying
  to debug why the EEPROM isn't mapped in as to what's going on.
This commit is contained in:
Adrian Chadd 2015-03-02 02:14:44 +00:00
parent e621924898
commit 0d327de13d
1 changed files with 16 additions and 3 deletions
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19
sys/dev/ath/if_ath_ahb.c
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@ -153,12 +153,24 @@ ath_ahb_attach(device_t dev)
eepromsize = ATH_EEPROM_DATA_SIZE * 2;
}
rid = 0;
device_printf(sc->sc_dev, "eeprom @ %p (%d bytes)\n",
(void *) eepromaddr, eepromsize);
psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, (uintptr_t) eepromaddr,
(uintptr_t) eepromaddr + (uintptr_t) (eepromsize - 1), 0, RF_ACTIVE);
/*
* XXX this assumes that the parent device is the nexus
* and will just pass through requests for all of memory.
*
* Later on, when this has to attach off of the actual
* AHB, this won't work.
*
* Ideally this would be done in machdep code in mips/atheros/
* and it'd expose the EEPROM via the firmware interface,
* so the ath/ath_ahb drivers can be loaded as modules
* after boot-time.
*/
psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY,
&rid, (uintptr_t) eepromaddr,
(uintptr_t) eepromaddr + (uintptr_t) (eepromsize - 1), 0, RF_ACTIVE);
if (psc->sc_eeprom == NULL) {
device_printf(dev, "cannot map eeprom space\n");
goto bad0;
@ -349,6 +361,7 @@ static driver_t ath_ahb_driver = {
};
static devclass_t ath_devclass;
DRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0);
DRIVER_MODULE(ath, apb, ath_ahb_driver, ath_devclass, 0, 0);
MODULE_VERSION(ath, 1);
MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */
MODULE_DEPEND(ath, if_ath, 1, 1, 1); /* if_ath driver */