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bcma: extract antenna gains from SPROM correctly

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Just like in case of SSB SPROMs they are encoded in a bit tricky way.
SPROM struct already uses s8 type and it's supposed to store decoded
values.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki
2014-07-15 16:54:47 +02:00
committed by John W. Linville
parent 6ad59343ec
commit d8aef3239e
2 changed files with 33 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/bcma/sprom.c
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@@ -201,6 +201,23 @@ static int bcma_sprom_valid(struct bcma_bus *bus, const u16 *sprom,
SPEX(_field[7], _offset + 14, _mask, _shift); \
} while (0)
static s8 sprom_extract_antgain(const u16 *in, u16 offset, u16 mask, u16 shift)
{
u16 v;
u8 gain;
v = in[SPOFF(offset)];
gain = (v & mask) >> shift;
if (gain == 0xFF) {
gain = 8; /* If unset use 2dBm */
} else {
/* Q5.2 Fractional part is stored in 0xC0 */
gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
}
return (s8)gain;
}
static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom)
{
u16 v, o;
@@ -381,14 +398,22 @@ static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom)
SPEX32(ofdm5ghpo, SSB_SPROM8_OFDM5GHPO, ~0, 0);
/* Extract the antenna gain values. */
SPEX(antenna_gain.a0, SSB_SPROM8_AGAIN01,
SSB_SPROM8_AGAIN0, SSB_SPROM8_AGAIN0_SHIFT);
SPEX(antenna_gain.a1, SSB_SPROM8_AGAIN01,
SSB_SPROM8_AGAIN1, SSB_SPROM8_AGAIN1_SHIFT);
SPEX(antenna_gain.a2, SSB_SPROM8_AGAIN23,
SSB_SPROM8_AGAIN2, SSB_SPROM8_AGAIN2_SHIFT);
SPEX(antenna_gain.a3, SSB_SPROM8_AGAIN23,
SSB_SPROM8_AGAIN3, SSB_SPROM8_AGAIN3_SHIFT);
bus->sprom.antenna_gain.a0 = sprom_extract_antgain(sprom,
SSB_SPROM8_AGAIN01,
SSB_SPROM8_AGAIN0,
SSB_SPROM8_AGAIN0_SHIFT);
bus->sprom.antenna_gain.a1 = sprom_extract_antgain(sprom,
SSB_SPROM8_AGAIN01,
SSB_SPROM8_AGAIN1,
SSB_SPROM8_AGAIN1_SHIFT);
bus->sprom.antenna_gain.a2 = sprom_extract_antgain(sprom,
SSB_SPROM8_AGAIN23,
SSB_SPROM8_AGAIN2,
SSB_SPROM8_AGAIN2_SHIFT);
bus->sprom.antenna_gain.a3 = sprom_extract_antgain(sprom,
SSB_SPROM8_AGAIN23,
SSB_SPROM8_AGAIN3,
SSB_SPROM8_AGAIN3_SHIFT);
SPEX(leddc_on_time, SSB_SPROM8_LEDDC, SSB_SPROM8_LEDDC_ON,
SSB_SPROM8_LEDDC_ON_SHIFT);