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p54: more accurate rssi to dBm conversion
This patch replaces the static rssi auto calibration data with more precise values out of the device's eeprom. 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
da9f57eade
commit
69ba3e5d74
@ -61,6 +61,13 @@ struct p54_edcf_queue_param {
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__le16 txop;
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} __attribute__ ((packed));
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struct p54_rssi_linear_approximation {
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s16 mul;
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s16 add;
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s16 longbow_unkn;
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s16 longbow_unk2;
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};
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#define EEPROM_READBACK_LEN 0x3fc
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#define ISL38XX_DEV_FIRMWARE_ADDR 0x20000
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@ -91,6 +98,7 @@ struct p54_common {
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struct pda_channel_output_limit *output_limit;
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unsigned int output_limit_len;
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struct pda_pa_curve_data *curve_data;
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struct p54_rssi_linear_approximation rssical_db[IEEE80211_NUM_BANDS];
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unsigned int filter_flags;
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bool use_short_slot;
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u16 rxhw;
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@ -335,6 +335,36 @@ static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
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"Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
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static int p54_init_xbow_synth(struct ieee80211_hw *dev);
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static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
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u16 type)
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{
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struct p54_common *priv = dev->priv;
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int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
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int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
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int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
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int i;
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if (len != (entry_size * num_entries)) {
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printk(KERN_ERR "%s: unknown rssi calibration data packing "
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" type:(%x) len:%d.\n",
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wiphy_name(dev->wiphy), type, len);
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print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
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data, len);
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printk(KERN_ERR "%s: please report this issue.\n",
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wiphy_name(dev->wiphy));
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return;
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}
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for (i = 0; i < num_entries; i++) {
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struct pda_rssi_cal_entry *cal = data +
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(offset + i * entry_size);
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priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
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priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
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}
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}
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static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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{
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struct p54_common *priv = dev->priv;
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@ -434,6 +464,12 @@ static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
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priv->version = *(u8 *)(entry->data + 1);
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break;
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case PDR_RSSI_LINEAR_APPROXIMATION:
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case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
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case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
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p54_parse_rssical(dev, entry->data, data_len,
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le16_to_cpu(entry->code));
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break;
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case PDR_END:
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/* make it overrun */
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entry_len = len;
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@ -453,10 +489,7 @@ static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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case PDR_DEFAULT_COUNTRY:
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case PDR_ANTENNA_GAIN:
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case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA:
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case PDR_RSSI_LINEAR_APPROXIMATION:
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case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
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case PDR_REGULATORY_POWER_LIMITS:
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case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
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case PDR_RADIATED_TRANSMISSION_CORRECTION:
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case PDR_PRISM_TX_IQ_CALIBRATION:
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case PDR_BASEBAND_REGISTERS:
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@ -527,8 +560,11 @@ static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
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{
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/* TODO: get the rssi_add & rssi_mul data from the eeprom */
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return ((rssi * 0x83) / 64 - 400) / 4;
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struct p54_common *priv = dev->priv;
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int band = dev->conf.channel->band;
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return ((rssi * priv->rssical_db[band].mul) / 64 +
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priv->rssical_db[band].add) / 4;
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}
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static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
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@ -1466,15 +1502,15 @@ static int p54_setup_mac(struct ieee80211_hw *dev)
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return 0;
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}
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static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell,
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u16 frequency)
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static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell)
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{
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struct p54_common *priv = dev->priv;
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struct sk_buff *skb;
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struct p54_scan *chan;
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unsigned int i;
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void *entry;
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__le16 freq = cpu_to_le16(frequency);
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__le16 freq = cpu_to_le16(dev->conf.channel->center_freq);
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int band = dev->conf.channel->band;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
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@ -1535,11 +1571,11 @@ static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell,
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}
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if (priv->fw_var < 0x500) {
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chan->v1.rssical_mul = cpu_to_le16(130);
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chan->v1.rssical_add = cpu_to_le16(0xfe70);
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chan->v1_rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
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chan->v1_rssi.add = cpu_to_le16(priv->rssical_db[band].add);
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} else {
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chan->v2.rssical_mul = cpu_to_le16(130);
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chan->v2.rssical_add = cpu_to_le16(0xfe70);
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chan->v2.rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
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chan->v2.rssi.add = cpu_to_le16(priv->rssical_db[band].add);
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chan->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
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memset(chan->v2.rts_rates, 0, 8);
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}
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@ -1801,8 +1837,7 @@ static int p54_config(struct ieee80211_hw *dev, u32 changed)
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goto out;
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}
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if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
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ret = p54_scan(dev, P54_SCAN_EXIT, 0,
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conf->channel->center_freq);
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ret = p54_scan(dev, P54_SCAN_EXIT, 0);
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if (ret)
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goto out;
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}
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@ -1828,8 +1863,7 @@ static int p54_config_interface(struct ieee80211_hw *dev,
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}
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if (conf->changed & IEEE80211_IFCC_BEACON) {
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ret = p54_scan(dev, P54_SCAN_EXIT, 0,
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dev->conf.channel->center_freq);
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ret = p54_scan(dev, P54_SCAN_EXIT, 0);
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if (ret)
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goto out;
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ret = p54_setup_mac(dev);
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@ -1968,8 +2002,7 @@ static void p54_bss_info_changed(struct ieee80211_hw *dev,
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priv->basic_rate_mask = info->basic_rates;
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p54_setup_mac(dev);
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if (priv->fw_var >= 0x500)
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p54_scan(dev, P54_SCAN_EXIT, 0,
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dev->conf.channel->center_freq);
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p54_scan(dev, P54_SCAN_EXIT, 0);
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}
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if (changed & BSS_CHANGED_ASSOC) {
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if (info->assoc) {
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@ -178,6 +178,11 @@ struct pda_pa_curve_data {
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u8 data[0];
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} __attribute__ ((packed));
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struct pda_rssi_cal_entry {
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__le16 mul;
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__le16 add;
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} __attribute__ ((packed));
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/*
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* this defines the PDR codes used to build PDAs as defined in document
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* number 553155. The current implementation mirrors version 1.1 of the
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@ -429,22 +434,18 @@ struct p54_scan {
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u8 dup_16qam;
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u8 dup_64qam;
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union {
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struct {
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__le16 rssical_mul;
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__le16 rssical_add;
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} v1 __attribute__ ((packed));
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struct pda_rssi_cal_entry v1_rssi;
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struct {
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__le32 basic_rate_mask;
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u8 rts_rates[8];
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__le16 rssical_mul;
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__le16 rssical_add;
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struct pda_rssi_cal_entry rssi;
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} v2 __attribute__ ((packed));
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} __attribute__ ((packed));
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} __attribute__ ((packed));
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#define P54_SCAN_V1_LEN (sizeof(struct p54_scan)-12)
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#define P54_SCAN_V2_LEN (sizeof(struct p54_scan))
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#define P54_SCAN_V1_LEN 0x70
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#define P54_SCAN_V2_LEN 0x7c
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struct p54_led {
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__le16 mode;
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