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Manually stomp the DMA size to 128B for AR5418 devices. This patch should probably be extended to do this for all PCIe devices.

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The register defines were taken from ath5k.

This patch has been only lightly tested, I'm afraid - trying for more coverage.


git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3641 0192ed92-7a03-0410-a25b-9323aeb14dbd
This commit is contained in:
mentor 2008-05-17 04:53:35 +00:00
parent 15abd8d1f1
commit c4093cb5c8
4 changed files with 44 additions and 2 deletions
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5
ath/if_ath.c
View File

@ -627,6 +627,9 @@ ath_attach(u_int16_t devid, struct net_device *dev, HAL_BUS_TAG tag)
IPRINTF(sc, "Interference mitigation is supported. Currently %s.\n",
(sc->sc_useintmit ? "enabled" : "disabled"));
}
sc->sc_dmasize_stomp = 0;
/*
* Check if the MAC has multi-rate retry support.
* We do this by trying to setup a fake extended
@ -1698,6 +1701,8 @@ static HAL_BOOL ath_hw_reset(struct ath_softc* sc, HAL_OPMODE opmode,
ath_hal_setintmit(sc->sc_ah, sc->sc_useintmit);
#endif
ath_override_intmit_if_disabled(sc);
if (sc->sc_dmasize_stomp)
ath_hal_set_dmasize_pcie(sc->sc_ah);
if (sc->sc_softled)
ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin);
ath_update_txpow(sc); /* Update TX power state. */

33
ath/if_ath_hal_extensions.h
View File

@ -143,6 +143,34 @@
#define DEFAULT_AR5K_PHY_SPUR_THRESH 2
#define DEFAULT_AR5K_PHY_SIG_FIRSTEP 0
/*
* Transmit configuration register
*/
#define AR5K_TXCFG 0x0030 /* Register Address */
#define AR5K_TXCFG_SDMAMR 0x00000007 /* DMA size */
#define AR5K_TXCFG_SDMAMR_S 0
/*
* Receive configuration register
*/
#define AR5K_RXCFG 0x0034 /* Register Address */
#define AR5K_RXCFG_SDMAMW 0x00000007 /* DMA size */
#define AR5K_RXCFG_SDMAMW_S 0
/*
* DMA size definitions (2^(n+2))
*/
enum ath5k_dmasize {
AR5K_DMASIZE_4B = 0,
AR5K_DMASIZE_8B,
AR5K_DMASIZE_16B,
AR5K_DMASIZE_32B,
AR5K_DMASIZE_64B,
AR5K_DMASIZE_128B,
AR5K_DMASIZE_256B,
AR5K_DMASIZE_512B
};
static inline unsigned long field_width(unsigned long mask, unsigned long shift)
{
unsigned long r = 0;
@ -429,4 +457,9 @@ static inline void ath_hal_verify_default_intmit(struct ath_hal *ah) {
VERIFICATION_WARNING(ah, AR5K_PHY_SPUR, AR5K_PHY_SPUR_THRESH, 0);
}
static inline void ath_hal_set_dmasize_pcie(struct ath_hal *ah) {
SET_FIELD(ah, AR5K_TXCFG, AR5K_TXCFG_SDMAMR, AR5K_DMASIZE_128B);
SET_FIELD(ah, AR5K_RXCFG, AR5K_RXCFG_SDMAMW, AR5K_DMASIZE_128B);
}
#endif /* _IF_ATH_HAL_EXTENSIONS_H_ */

3
ath/if_ath_pci.c
View File

@ -252,6 +252,9 @@ ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
dev_info, dev->name, athname ? athname : "Atheros ???",
(unsigned long long)phymem, dev->irq);
if (vdevice == AR5418_DEVID)
sc->aps_sc.sc_dmasize_stomp = 1;
/* ready to process interrupts */
sc->aps_sc.sc_invalid = 0;

5
ath/if_athvar.h
View File

@ -692,8 +692,9 @@ struct ath_softc {
unsigned int sc_txcont:1; /* Is continuous transmit enabled? */
unsigned int sc_dfs_testmode:1; /* IF this is on, AP vaps will stay in
* 'channel availability check' indefinately,
* reporting radar and interference detections.
*/
* reporting radar and interference detections. */
unsigned int sc_dmasize_stomp:1; /* Whether to stomp on DMA size. */
unsigned int sc_txcont_power; /* Continuous transmit power in 0.5dBm units */
unsigned int sc_txcont_rate; /* Continuous transmit rate in Mbps */