On 2010-12-02 12:06 PM, Vasanthakumar Thiagarajan wrote:
> Signed-off-by: Vasanthakumar Thiagarajan <vasanth@xxxxxxxxxxx>
> ---
> drivers/net/wireless/ath/ath9k/ar9003_phy.c | 25 ++++++++++++++++++++++++-
> 1 files changed, 24 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
> index b34a9e9..136e64a 100644
> --- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
> +++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
> @@ -25,6 +25,24 @@ static const int cycpwrThr1_table[] =
> /* level: 0 1 2 3 4 5 6 7 8 */
> { -6, -4, -2, 0, 2, 4, 6, 8 }; /* lvl 0-7, default 3 */
>
> +/* Chansel table used by ar9485 */
> +static const u32 ar9003_chansel_xtal_40M[] = {
> + 0xa0ccbe,
> + 0xa12213,
> + 0xa17769,
> + 0xa1ccbe,
> + 0xa22213,
> + 0xa27769,
> + 0xa2ccbe,
> + 0xa32213,
> + 0xa37769,
> + 0xa3ccbe,
> + 0xa42213,
> + 0xa47769,
> + 0xa4ccbe,
> + 0xa5998b,
> +};
> +
> /*
> * register values to turn OFDM weak signal detection OFF
> */
> @@ -75,7 +93,12 @@ static int ar9003_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
> freq = centers.synth_center;
>
> if (freq < 4800) { /* 2 GHz, fractional mode */
> - channelSel = CHANSEL_2G(freq);
> + if (AR_SREV_9485(ah)) {
> + int ichan = ieee80211_frequency_to_channel(freq);
> +
> + channelSel = ar9003_chansel_xtal_40M[ichan - 1];
How about using this formula for AR9485:
#define CHANSEL_2G_AR9485(_freq) (((_freq) * 0x10000 - 215) / CHANSEL_DIV)
While I don't know where the 215 comes from (the calculation does not
appear to be documented anywhere and I found it by trial & error),
I do think it's better to have a simple formula than a long table
of hardcoded values.
- Felix
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