p54: generate channel list dynamically
This patch enhances the eeprom parser to generate customized channel list for every device. Signed-off-by: Christian Lamparter <chunkeey@web.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter
John W. Linville
parent
596a07c18b
commit
1a9b6679ad
3 changed files with 261 additions and 67 deletions
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@ -19,6 +19,7 @@
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#include <linux/init.h>
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#include <linux/firmware.h>
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#include <linux/etherdevice.h>
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#include <linux/sort.h>
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#include <net/mac80211.h>
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@ -41,30 +42,6 @@ static struct ieee80211_rate p54_bgrates[] = {
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{ .bitrate = 540, .hw_value = 11, },
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};
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static struct ieee80211_channel p54_bgchannels[] = {
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{ .center_freq = 2412, .hw_value = 1, },
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{ .center_freq = 2417, .hw_value = 2, },
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{ .center_freq = 2422, .hw_value = 3, },
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{ .center_freq = 2427, .hw_value = 4, },
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{ .center_freq = 2432, .hw_value = 5, },
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{ .center_freq = 2437, .hw_value = 6, },
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{ .center_freq = 2442, .hw_value = 7, },
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{ .center_freq = 2447, .hw_value = 8, },
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{ .center_freq = 2452, .hw_value = 9, },
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{ .center_freq = 2457, .hw_value = 10, },
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{ .center_freq = 2462, .hw_value = 11, },
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{ .center_freq = 2467, .hw_value = 12, },
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{ .center_freq = 2472, .hw_value = 13, },
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{ .center_freq = 2484, .hw_value = 14, },
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};
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static struct ieee80211_supported_band band_2GHz = {
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.channels = p54_bgchannels,
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.n_channels = ARRAY_SIZE(p54_bgchannels),
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.bitrates = p54_bgrates,
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.n_bitrates = ARRAY_SIZE(p54_bgrates),
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};
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static struct ieee80211_rate p54_arates[] = {
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{ .bitrate = 60, .hw_value = 4, },
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{ .bitrate = 90, .hw_value = 5, },
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@ -76,51 +53,257 @@ static struct ieee80211_rate p54_arates[] = {
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{ .bitrate = 540, .hw_value = 11, },
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};
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static struct ieee80211_channel p54_achannels[] = {
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{ .center_freq = 4920 },
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{ .center_freq = 4940 },
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{ .center_freq = 4960 },
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{ .center_freq = 4980 },
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{ .center_freq = 5040 },
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{ .center_freq = 5060 },
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{ .center_freq = 5080 },
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{ .center_freq = 5170 },
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{ .center_freq = 5180 },
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{ .center_freq = 5190 },
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{ .center_freq = 5200 },
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{ .center_freq = 5210 },
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{ .center_freq = 5220 },
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{ .center_freq = 5230 },
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{ .center_freq = 5240 },
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{ .center_freq = 5260 },
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{ .center_freq = 5280 },
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{ .center_freq = 5300 },
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{ .center_freq = 5320 },
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{ .center_freq = 5500 },
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{ .center_freq = 5520 },
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{ .center_freq = 5540 },
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{ .center_freq = 5560 },
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{ .center_freq = 5580 },
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{ .center_freq = 5600 },
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{ .center_freq = 5620 },
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{ .center_freq = 5640 },
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{ .center_freq = 5660 },
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{ .center_freq = 5680 },
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{ .center_freq = 5700 },
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{ .center_freq = 5745 },
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{ .center_freq = 5765 },
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{ .center_freq = 5785 },
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{ .center_freq = 5805 },
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{ .center_freq = 5825 },
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#define CHAN_HAS_CAL BIT(0)
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#define CHAN_HAS_LIMIT BIT(1)
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#define CHAN_HAS_CURVE BIT(2)
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#define CHAN_HAS_ALL (CHAN_HAS_CAL | CHAN_HAS_LIMIT | CHAN_HAS_CURVE)
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struct p54_channel_entry {
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u16 freq;
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u16 data;
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int index;
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enum ieee80211_band band;
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};
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static struct ieee80211_supported_band band_5GHz = {
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.channels = p54_achannels,
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.n_channels = ARRAY_SIZE(p54_achannels),
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.bitrates = p54_arates,
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.n_bitrates = ARRAY_SIZE(p54_arates),
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struct p54_channel_list {
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struct p54_channel_entry *channels;
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size_t entries;
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size_t max_entries;
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size_t band_channel_num[IEEE80211_NUM_BANDS];
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};
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static int p54_get_band_from_freq(u16 freq)
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{
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/* FIXME: sync these values with the 802.11 spec */
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if ((freq >= 2412) && (freq <= 2484))
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return IEEE80211_BAND_2GHZ;
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if ((freq >= 4920) && (freq <= 5825))
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return IEEE80211_BAND_5GHZ;
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return -1;
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}
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static int p54_compare_channels(const void *_a,
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const void *_b)
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{
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const struct p54_channel_entry *a = _a;
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const struct p54_channel_entry *b = _b;
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return a->index - b->index;
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}
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static int p54_fill_band_bitrates(struct ieee80211_hw *dev,
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struct ieee80211_supported_band *band_entry,
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enum ieee80211_band band)
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{
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/* TODO: generate rate array dynamically */
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switch (band) {
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case IEEE80211_BAND_2GHZ:
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band_entry->bitrates = p54_bgrates;
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band_entry->n_bitrates = ARRAY_SIZE(p54_bgrates);
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break;
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case IEEE80211_BAND_5GHZ:
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band_entry->bitrates = p54_arates;
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band_entry->n_bitrates = ARRAY_SIZE(p54_arates);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int p54_generate_band(struct ieee80211_hw *dev,
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struct p54_channel_list *list,
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enum ieee80211_band band)
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{
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struct p54_common *priv = dev->priv;
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struct ieee80211_supported_band *tmp, *old;
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unsigned int i, j;
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int ret = -ENOMEM;
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if ((!list->entries) || (!list->band_channel_num[band]))
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return 0;
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tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
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if (!tmp)
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goto err_out;
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tmp->channels = kzalloc(sizeof(struct ieee80211_channel) *
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list->band_channel_num[band], GFP_KERNEL);
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if (!tmp->channels)
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goto err_out;
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ret = p54_fill_band_bitrates(dev, tmp, band);
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if (ret)
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goto err_out;
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for (i = 0, j = 0; (j < list->band_channel_num[band]) &&
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(i < list->entries); i++) {
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if (list->channels[i].band != band)
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continue;
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if (list->channels[i].data != CHAN_HAS_ALL) {
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printk(KERN_ERR "%s:%s%s%s is/are missing for "
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"channel:%d [%d MHz].\n",
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wiphy_name(dev->wiphy),
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(list->channels[i].data & CHAN_HAS_CAL ? "" :
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" [iqauto calibration data]"),
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(list->channels[i].data & CHAN_HAS_LIMIT ? "" :
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" [output power limits]"),
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(list->channels[i].data & CHAN_HAS_CURVE ? "" :
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" [curve data]"),
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list->channels[i].index, list->channels[i].freq);
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}
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tmp->channels[j].band = list->channels[i].band;
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tmp->channels[j].center_freq = list->channels[i].freq;
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j++;
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}
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tmp->n_channels = list->band_channel_num[band];
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old = priv->band_table[band];
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priv->band_table[band] = tmp;
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if (old) {
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kfree(old->channels);
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kfree(old);
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}
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return 0;
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err_out:
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if (tmp) {
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kfree(tmp->channels);
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kfree(tmp);
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}
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return ret;
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}
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static void p54_update_channel_param(struct p54_channel_list *list,
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u16 freq, u16 data)
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{
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int band, i;
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/*
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* usually all lists in the eeprom are mostly sorted.
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* so it's very likely that the entry we are looking for
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* is right at the end of the list
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*/
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for (i = list->entries; i >= 0; i--) {
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if (freq == list->channels[i].freq) {
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list->channels[i].data |= data;
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break;
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}
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}
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if ((i < 0) && (list->entries < list->max_entries)) {
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/* entry does not exist yet. Initialize a new one. */
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band = p54_get_band_from_freq(freq);
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/*
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* filter out frequencies which don't belong into
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* any supported band.
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*/
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if (band < 0)
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return ;
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i = list->entries++;
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list->band_channel_num[band]++;
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list->channels[i].freq = freq;
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list->channels[i].data = data;
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list->channels[i].band = band;
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list->channels[i].index = ieee80211_frequency_to_channel(freq);
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/* TODO: parse output_limit and fill max_power */
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}
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}
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static int p54_generate_channel_lists(struct ieee80211_hw *dev)
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{
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struct p54_common *priv = dev->priv;
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struct p54_channel_list *list;
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unsigned int i, j, max_channel_num;
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int ret = -ENOMEM;
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u16 freq;
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if ((priv->iq_autocal_len != priv->curve_data->entries) ||
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(priv->iq_autocal_len != priv->output_limit->entries))
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printk(KERN_ERR "%s: EEPROM is damaged... you may not be able"
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"to use all channels with this device.\n",
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wiphy_name(dev->wiphy));
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max_channel_num = max_t(unsigned int, priv->output_limit->entries,
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priv->iq_autocal_len);
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max_channel_num = max_t(unsigned int, max_channel_num,
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priv->curve_data->entries);
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list = kzalloc(sizeof(*list), GFP_KERNEL);
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if (!list)
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goto free;
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list->max_entries = max_channel_num;
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list->channels = kzalloc(sizeof(struct p54_channel_entry) *
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max_channel_num, GFP_KERNEL);
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if (!list->channels)
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goto free;
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for (i = 0; i < max_channel_num; i++) {
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if (i < priv->iq_autocal_len) {
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freq = le16_to_cpu(priv->iq_autocal[i].freq);
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p54_update_channel_param(list, freq, CHAN_HAS_CAL);
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}
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if (i < priv->output_limit->entries) {
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freq = le16_to_cpup((__le16 *) (i *
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priv->output_limit->entry_size +
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priv->output_limit->offset +
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priv->output_limit->data));
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p54_update_channel_param(list, freq, CHAN_HAS_LIMIT);
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}
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if (i < priv->curve_data->entries) {
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freq = le16_to_cpup((__le16 *) (i *
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priv->curve_data->entry_size +
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priv->curve_data->offset +
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priv->curve_data->data));
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p54_update_channel_param(list, freq, CHAN_HAS_CURVE);
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}
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}
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/* sort the list by the channel index */
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sort(list->channels, list->entries, sizeof(struct p54_channel_entry),
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p54_compare_channels, NULL);
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for (i = 0, j = 0; i < IEEE80211_NUM_BANDS; i++) {
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if (list->band_channel_num[i]) {
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ret = p54_generate_band(dev, list, i);
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if (ret)
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goto free;
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j++;
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}
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}
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if (j == 0) {
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/* no useable band available. */
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ret = -EINVAL;
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}
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free:
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if (list) {
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kfree(list->channels);
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kfree(list);
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}
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return ret;
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}
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static int p54_convert_rev0(struct ieee80211_hw *dev,
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struct pda_pa_curve_data *curve_data)
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{
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@ -487,13 +670,19 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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goto err;
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}
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err = p54_generate_channel_lists(dev);
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if (err)
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goto err;
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priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
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if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
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p54_init_xbow_synth(priv);
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if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
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dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
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dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
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priv->band_table[IEEE80211_BAND_2GHZ];
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if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
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dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
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dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
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priv->band_table[IEEE80211_BAND_5GHZ];
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if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
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priv->rx_diversity_mask = 3;
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if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
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@ -598,6 +598,10 @@ EXPORT_SYMBOL_GPL(p54_register_common);
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void p54_free_common(struct ieee80211_hw *dev)
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{
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struct p54_common *priv = dev->priv;
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unsigned int i;
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for (i = 0; i < IEEE80211_NUM_BANDS; i++)
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kfree(priv->band_table[i]);
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kfree(priv->iq_autocal);
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kfree(priv->output_limit);
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@ -198,6 +198,7 @@ struct p54_common {
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struct p54_cal_database *curve_data;
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struct p54_cal_database *output_limit;
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struct p54_rssi_linear_approximation rssical_db[IEEE80211_NUM_BANDS];
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struct ieee80211_supported_band *band_table[IEEE80211_NUM_BANDS];
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/* BBP/MAC state */
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u8 mac_addr[ETH_ALEN];
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