diff options
author | Christian Lamparter <chunkeey@googlemail.com> | 2012-07-28 00:57:51 (GMT) |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2012-08-10 19:17:14 (GMT) |
commit | 9bc63816be9bf504414d350e605a4b30f857907d (patch) | |
tree | 67fd903805199135fd7dbb8a85be615ce6a584b1 /drivers/net/wireless/p54/eeprom.c | |
parent | 57f784fed3b9a33084c0cd0f6d08d98f87d2193f (diff) | |
download | linux-fsl-qoriq-9bc63816be9bf504414d350e605a4b30f857907d.tar.xz |
p54: parse output power table
For the upcoming tpc changes, the driver needs
to provide sensible max output values for each
supported channel.
And while the eeprom always had a output_limit
table, which defines the upper limit for each
frequency and modulation, it was never really
useful for anything... until now.
Note: For anyone wondering about what your card
is calibrated for: check "iw list".
* 2412 MHz [1] (18.0 dBm)
* 2437 MHz [6] (19.0 dBm)
[...]
* 5180 MHz [36] (18.0 dBm)
* 5260 MHz [52] (17.0 dBm) (radar detection)
* 5680 MHz [136] (19.0 dBm) (radar detection)
(for a Dell Wireless 1450 USB Adapter)
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/p54/eeprom.c')
-rw-r--r-- | drivers/net/wireless/p54/eeprom.c | 104 |
1 files changed, 80 insertions, 24 deletions
diff --git a/drivers/net/wireless/p54/eeprom.c b/drivers/net/wireless/p54/eeprom.c index 1403709..d4d8610 100644 --- a/drivers/net/wireless/p54/eeprom.c +++ b/drivers/net/wireless/p54/eeprom.c @@ -76,6 +76,7 @@ struct p54_channel_entry { u16 freq; u16 data; int index; + int max_power; enum ieee80211_band band; }; @@ -173,6 +174,7 @@ static int p54_generate_band(struct ieee80211_hw *dev, for (i = 0, j = 0; (j < list->band_channel_num[band]) && (i < list->entries); i++) { struct p54_channel_entry *chan = &list->channels[i]; + struct ieee80211_channel *dest = &tmp->channels[j]; if (chan->band != band) continue; @@ -190,14 +192,15 @@ static int p54_generate_band(struct ieee80211_hw *dev, continue; } - tmp->channels[j].band = chan->band; - tmp->channels[j].center_freq = chan->freq; + dest->band = chan->band; + dest->center_freq = chan->freq; + dest->max_power = chan->max_power; priv->survey[*chan_num].channel = &tmp->channels[j]; priv->survey[*chan_num].filled = SURVEY_INFO_NOISE_DBM | SURVEY_INFO_CHANNEL_TIME | SURVEY_INFO_CHANNEL_TIME_BUSY | SURVEY_INFO_CHANNEL_TIME_TX; - tmp->channels[j].hw_value = (*chan_num); + dest->hw_value = (*chan_num); j++; (*chan_num)++; } @@ -229,10 +232,11 @@ err_out: return ret; } -static void p54_update_channel_param(struct p54_channel_list *list, - u16 freq, u16 data) +static struct p54_channel_entry *p54_update_channel_param(struct p54_channel_list *list, + u16 freq, u16 data) { - int band, i; + int i; + struct p54_channel_entry *entry = NULL; /* * usually all lists in the eeprom are mostly sorted. @@ -241,30 +245,74 @@ static void p54_update_channel_param(struct p54_channel_list *list, */ for (i = list->entries; i >= 0; i--) { if (freq == list->channels[i].freq) { - list->channels[i].data |= data; + entry = &list->channels[i]; break; } } if ((i < 0) && (list->entries < list->max_entries)) { /* entry does not exist yet. Initialize a new one. */ - band = p54_get_band_from_freq(freq); + int band = p54_get_band_from_freq(freq); /* * filter out frequencies which don't belong into * any supported band. */ - if (band < 0) - return ; + if (band >= 0) { + i = list->entries++; + list->band_channel_num[band]++; + + entry = &list->channels[i]; + entry->freq = freq; + entry->band = band; + entry->index = ieee80211_frequency_to_channel(freq); + entry->max_power = 0; + entry->data = 0; + } + } - i = list->entries++; - list->band_channel_num[band]++; + if (entry) + entry->data |= data; - list->channels[i].freq = freq; - list->channels[i].data = data; - list->channels[i].band = band; - list->channels[i].index = ieee80211_frequency_to_channel(freq); - /* TODO: parse output_limit and fill max_power */ + return entry; +} + +static int p54_get_maxpower(struct p54_common *priv, void *data) +{ + switch (priv->rxhw & PDR_SYNTH_FRONTEND_MASK) { + case PDR_SYNTH_FRONTEND_LONGBOW: { + struct pda_channel_output_limit_longbow *pda = data; + int j; + u16 rawpower = 0; + pda = data; + for (j = 0; j < ARRAY_SIZE(pda->point); j++) { + struct pda_channel_output_limit_point_longbow *point = + &pda->point[j]; + rawpower = max(rawpower, le16_to_cpu(point->val_qpsk)); + rawpower = max(rawpower, le16_to_cpu(point->val_bpsk)); + rawpower = max(rawpower, le16_to_cpu(point->val_16qam)); + rawpower = max(rawpower, le16_to_cpu(point->val_64qam)); + } + /* longbow seems to use 1/16 dBm units */ + return rawpower / 16; + } + + case PDR_SYNTH_FRONTEND_DUETTE3: + case PDR_SYNTH_FRONTEND_DUETTE2: + case PDR_SYNTH_FRONTEND_FRISBEE: + case PDR_SYNTH_FRONTEND_XBOW: { + struct pda_channel_output_limit *pda = data; + u8 rawpower = 0; + rawpower = max(rawpower, pda->val_qpsk); + rawpower = max(rawpower, pda->val_bpsk); + rawpower = max(rawpower, pda->val_16qam); + rawpower = max(rawpower, pda->val_64qam); + /* raw values are in 1/4 dBm units */ + return rawpower / 4; + } + + default: + return 20; } } @@ -315,12 +363,19 @@ static int p54_generate_channel_lists(struct ieee80211_hw *dev) } if (i < priv->output_limit->entries) { - freq = le16_to_cpup((__le16 *) (i * - priv->output_limit->entry_size + - priv->output_limit->offset + - priv->output_limit->data)); - - p54_update_channel_param(list, freq, CHAN_HAS_LIMIT); + struct p54_channel_entry *tmp; + + void *data = (void *) ((unsigned long) i * + priv->output_limit->entry_size + + priv->output_limit->offset + + priv->output_limit->data); + + freq = le16_to_cpup((__le16 *) data); + tmp = p54_update_channel_param(list, freq, + CHAN_HAS_LIMIT); + if (tmp) { + tmp->max_power = p54_get_maxpower(priv, data); + } } if (i < priv->curve_data->entries) { @@ -834,11 +889,12 @@ good_eeprom: goto err; } + priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK; + err = p54_generate_channel_lists(dev); if (err) goto err; - priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK; if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW) p54_init_xbow_synth(priv); if (!(synth & PDR_SYNTH_24_GHZ_DISABLED)) |