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-rw-r--r--package/wificonf/wificonf.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/package/wificonf/wificonf.c b/package/wificonf/wificonf.c
index f5f43f1b3e..a93bba3eda 100644
--- a/package/wificonf/wificonf.c
+++ b/package/wificonf/wificonf.c
@@ -112,6 +112,64 @@ static int nvram_disabled(char *name)
}
+/* Quarter dBm units to mW
+ * Table starts at QDBM_OFFSET, so the first entry is mW for qdBm=153
+ * Table is offset so the last entry is largest mW value that fits in
+ * a uint16.
+ */
+
+#define QDBM_OFFSET 153
+#define QDBM_TABLE_LEN 40
+
+/* Smallest mW value that will round up to the first table entry, QDBM_OFFSET.
+ * Value is ( mW(QDBM_OFFSET - 1) + mW(QDBM_OFFSET) ) / 2
+ */
+#define QDBM_TABLE_LOW_BOUND 6493
+
+/* Largest mW value that will round down to the last table entry,
+ * QDBM_OFFSET + QDBM_TABLE_LEN-1.
+ * Value is ( mW(QDBM_OFFSET + QDBM_TABLE_LEN - 1) + mW(QDBM_OFFSET + QDBM_TABLE_LEN) ) / 2.
+ */
+#define QDBM_TABLE_HIGH_BOUND 64938
+
+static const uint16 nqdBm_to_mW_map[QDBM_TABLE_LEN] = {
+/* qdBm: +0 +1 +2 +3 +4 +5 +6 +7 */
+/* 153: */ 6683, 7079, 7499, 7943, 8414, 8913, 9441, 10000,
+/* 161: */ 10593, 11220, 11885, 12589, 13335, 14125, 14962, 15849,
+/* 169: */ 16788, 17783, 18836, 19953, 21135, 22387, 23714, 25119,
+/* 177: */ 26607, 28184, 29854, 31623, 33497, 35481, 37584, 39811,
+/* 185: */ 42170, 44668, 47315, 50119, 53088, 56234, 59566, 63096
+};
+
+unsigned char mw_to_qdbm(uint16 mw)
+{
+ char qdbm;
+ int offset;
+ uint mw_uint = mw;
+ uint boundary;
+
+ /* handle boundary case */
+ if (mw_uint <= 1)
+ return 0;
+
+ offset = QDBM_OFFSET;
+
+ /* move mw into the range of the table */
+ while (mw_uint < QDBM_TABLE_LOW_BOUND) {
+ mw_uint *= 10;
+ offset -= 40;
+ }
+
+ for (qdbm = 0; qdbm < QDBM_TABLE_LEN-1; qdbm++) {
+ boundary = nqdBm_to_mW_map[qdbm] + (nqdBm_to_mW_map[qdbm+1] - nqdBm_to_mW_map[qdbm])/2;
+ if (mw_uint < boundary) break;
+ }
+
+ qdbm += (unsigned char)offset;
+
+ return(qdbm);
+}
+
static int bcom_ioctl(int skfd, char *ifname, int cmd, void *buf, int len)
{
struct ifreq ifr;
@@ -523,6 +581,12 @@ static void setup_bcom_common(int skfd, char *ifname)
buf[3] = 0;
bcom_ioctl(skfd, ifname, WLC_SET_COUNTRY, buf, 4);
+ if (v = nvram_get(wl_var("txpwr"))) {
+ val = atoi(v);
+ val = mw_to_qdbm(val);
+ bcom_set_int(skfd, ifname, "qtxpower", val);
+ }
+
/* Set other options */
val = nvram_enabled(wl_var("lazywds"));
bcom_ioctl(skfd, ifname, WLC_SET_LAZYWDS, &val, sizeof(val));