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ar9170: add heavy clip handling

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add heavy clip handling for 2.4GHz only (similar to the vendor driver).

Signed-off-by: Joerg Albert <jal2@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Joerg Albert 2009-09-15 22:23:06 +02:00 committed by John W. Linville
parent 90f2908d32
commit 7c52c07de8
2 changed files with 69 additions and 4 deletions
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2
drivers/net/wireless/ath/ar9170/ar9170.h
View file

@ -202,6 +202,8 @@ struct ar9170 {
u8 power_2G_ht20[8];
u8 power_2G_ht40[8];
u8 phy_heavy_clip;
#ifdef CONFIG_AR9170_LEDS
struct delayed_work led_work;
struct ar9170_led leds[AR9170_NUM_LEDS];

71
drivers/net/wireless/ath/ar9170/phy.c
View file

@ -1278,8 +1278,38 @@ static u8 ar9170_get_max_edge_power(struct ar9170 *ar,
return rc;
}
/* calculate the conformance test limits and apply them to ar->power*
* (derived from otus hal/hpmain.c, line 3706 ff.)
static u8 ar9170_get_heavy_clip(struct ar9170 *ar,
struct ar9170_calctl_edges edges[],
u32 freq, enum ar9170_bw bw)
{
u8 f;
int i;
u8 rc = 0;
if (freq < 3000)
f = freq - 2300;
else
f = (freq - 4800) / 5;
if (bw == AR9170_BW_40_BELOW || bw == AR9170_BW_40_ABOVE)
rc |= 0xf0;
for (i = 0; i < AR5416_NUM_BAND_EDGES; i++) {
if (edges[i].channel == 0xff)
break;
if (f == edges[i].channel) {
if (!(edges[i].power_flags & AR9170_CALCTL_EDGE_FLAGS))
rc |= 0x0f;
break;
}
}
return rc;
}
/*
* calculate the conformance test limits and the heavy clip parameter
* and apply them to ar->power* (derived from otus hal/hpmain.c, line 3706)
*/
static void ar9170_calc_ctl(struct ar9170 *ar, u32 freq, enum ar9170_bw bw)
{
@ -1312,6 +1342,8 @@ static void ar9170_calc_ctl(struct ar9170 *ar, u32 freq, enum ar9170_bw bw)
#define EDGES(c, n) (ar->eeprom.ctl_data[c].control_edges[n])
ar->phy_heavy_clip = 0;
/*
* TODO: investigate the differences between OTUS'
* hpreg.c::zfHpGetRegulatoryDomain() and
@ -1347,6 +1379,15 @@ static void ar9170_calc_ctl(struct ar9170 *ar, u32 freq, enum ar9170_bw bw)
if (ctl_idx < AR5416_NUM_CTLS) {
int f_off = 0;
/* determine heav clip parameter from
the 11G edges array */
if (modes[i].ctl_mode == CTL_11G) {
ar->phy_heavy_clip =
ar9170_get_heavy_clip(ar,
EDGES(ctl_idx, 1),
freq, bw);
}
/* adjust freq for 40MHz */
if (modes[i].ctl_mode == CTL_2GHT40 ||
modes[i].ctl_mode == CTL_5GHT40) {
@ -1392,6 +1433,19 @@ static void ar9170_calc_ctl(struct ar9170 *ar, u32 freq, enum ar9170_bw bw)
modes[i].max_power);
}
}
if (ar->phy_heavy_clip & 0xf0) {
ar->power_2G_ht40[0]--;
ar->power_2G_ht40[1]--;
ar->power_2G_ht40[2]--;
}
if (ar->phy_heavy_clip & 0xf) {
ar->power_2G_ht20[0]++;
ar->power_2G_ht20[1]++;
ar->power_2G_ht20[2]++;
}
#undef EDGES
}
@ -1501,8 +1555,6 @@ static int ar9170_set_power_cal(struct ar9170 *ar, u32 freq, enum ar9170_bw bw)
/* calc. conformance test limits and apply to ar->power*[] */
ar9170_calc_ctl(ar, freq, bw);
/* TODO: (heavy clip) regulatory domain power level fine-tuning. */
/* set ACK/CTS TX power */
ar9170_regwrite_begin(ar);
@ -1645,6 +1697,17 @@ int ar9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
if (err)
return err;
if (ar->phy_heavy_clip) {
err = ar9170_write_reg(ar, 0x1c59e0,
0x200 | ar->phy_heavy_clip);
if (err) {
if (ar9170_nag_limiter(ar))
printk(KERN_ERR "%s: failed to set "
"heavy clip\n",
wiphy_name(ar->hw->wiphy));
}
}
for (i = 0; i < 2; i++) {
ar->noise[i] = ar9170_calc_noise_dbm(
(le32_to_cpu(vals[2 + i]) >> 19) & 0x1ff);