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authorAndrea Bastoni <bastoni@cs.unc.edu>2010-05-30 19:16:45 -0400
committerAndrea Bastoni <bastoni@cs.unc.edu>2010-05-30 19:16:45 -0400
commitada47b5fe13d89735805b566185f4885f5a3f750 (patch)
tree644b88f8a71896307d71438e9b3af49126ffb22b /drivers/net/wireless/zd1211rw/zd_chip.c
parent43e98717ad40a4ae64545b5ba047c7b86aa44f4f (diff)
parent3280f21d43ee541f97f8cda5792150d2dbec20d5 (diff)
Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_chip.c')
-rw-r--r--drivers/net/wireless/zd1211rw/zd_chip.c145
1 files changed, 3 insertions, 142 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_chip.c b/drivers/net/wireless/zd1211rw/zd_chip.c
index 4e79a9800134..b2af3c549bb3 100644
--- a/drivers/net/wireless/zd1211rw/zd_chip.c
+++ b/drivers/net/wireless/zd1211rw/zd_chip.c
@@ -25,6 +25,7 @@
25 25
26#include <linux/kernel.h> 26#include <linux/kernel.h>
27#include <linux/errno.h> 27#include <linux/errno.h>
28#include <linux/slab.h>
28 29
29#include "zd_def.h" 30#include "zd_def.h"
30#include "zd_chip.h" 31#include "zd_chip.h"
@@ -755,7 +756,7 @@ static int hw_reset_phy(struct zd_chip *chip)
755static int zd1211_hw_init_hmac(struct zd_chip *chip) 756static int zd1211_hw_init_hmac(struct zd_chip *chip)
756{ 757{
757 static const struct zd_ioreq32 ioreqs[] = { 758 static const struct zd_ioreq32 ioreqs[] = {
758 { CR_ZD1211_RETRY_MAX, 0x2 }, 759 { CR_ZD1211_RETRY_MAX, ZD1211_RETRY_COUNT },
759 { CR_RX_THRESHOLD, 0x000c0640 }, 760 { CR_RX_THRESHOLD, 0x000c0640 },
760 }; 761 };
761 762
@@ -767,7 +768,7 @@ static int zd1211_hw_init_hmac(struct zd_chip *chip)
767static int zd1211b_hw_init_hmac(struct zd_chip *chip) 768static int zd1211b_hw_init_hmac(struct zd_chip *chip)
768{ 769{
769 static const struct zd_ioreq32 ioreqs[] = { 770 static const struct zd_ioreq32 ioreqs[] = {
770 { CR_ZD1211B_RETRY_MAX, 0x02020202 }, 771 { CR_ZD1211B_RETRY_MAX, ZD1211B_RETRY_COUNT },
771 { CR_ZD1211B_CWIN_MAX_MIN_AC0, 0x007f003f }, 772 { CR_ZD1211B_CWIN_MAX_MIN_AC0, 0x007f003f },
772 { CR_ZD1211B_CWIN_MAX_MIN_AC1, 0x007f003f }, 773 { CR_ZD1211B_CWIN_MAX_MIN_AC1, 0x007f003f },
773 { CR_ZD1211B_CWIN_MAX_MIN_AC2, 0x003f001f }, 774 { CR_ZD1211B_CWIN_MAX_MIN_AC2, 0x003f001f },
@@ -1325,151 +1326,11 @@ int zd_chip_set_basic_rates(struct zd_chip *chip, u16 cr_rates)
1325 return r; 1326 return r;
1326} 1327}
1327 1328
1328static int ofdm_qual_db(u8 status_quality, u8 zd_rate, unsigned int size)
1329{
1330 static const u16 constants[] = {
1331 715, 655, 585, 540, 470, 410, 360, 315,
1332 270, 235, 205, 175, 150, 125, 105, 85,
1333 65, 50, 40, 25, 15
1334 };
1335
1336 int i;
1337 u32 x;
1338
1339 /* It seems that their quality parameter is somehow per signal
1340 * and is now transferred per bit.
1341 */
1342 switch (zd_rate) {
1343 case ZD_OFDM_RATE_6M:
1344 case ZD_OFDM_RATE_12M:
1345 case ZD_OFDM_RATE_24M:
1346 size *= 2;
1347 break;
1348 case ZD_OFDM_RATE_9M:
1349 case ZD_OFDM_RATE_18M:
1350 case ZD_OFDM_RATE_36M:
1351 case ZD_OFDM_RATE_54M:
1352 size *= 4;
1353 size /= 3;
1354 break;
1355 case ZD_OFDM_RATE_48M:
1356 size *= 3;
1357 size /= 2;
1358 break;
1359 default:
1360 return -EINVAL;
1361 }
1362
1363 x = (10000 * status_quality)/size;
1364 for (i = 0; i < ARRAY_SIZE(constants); i++) {
1365 if (x > constants[i])
1366 break;
1367 }
1368
1369 switch (zd_rate) {
1370 case ZD_OFDM_RATE_6M:
1371 case ZD_OFDM_RATE_9M:
1372 i += 3;
1373 break;
1374 case ZD_OFDM_RATE_12M:
1375 case ZD_OFDM_RATE_18M:
1376 i += 5;
1377 break;
1378 case ZD_OFDM_RATE_24M:
1379 case ZD_OFDM_RATE_36M:
1380 i += 9;
1381 break;
1382 case ZD_OFDM_RATE_48M:
1383 case ZD_OFDM_RATE_54M:
1384 i += 15;
1385 break;
1386 default:
1387 return -EINVAL;
1388 }
1389
1390 return i;
1391}
1392
1393static int ofdm_qual_percent(u8 status_quality, u8 zd_rate, unsigned int size)
1394{
1395 int r;
1396
1397 r = ofdm_qual_db(status_quality, zd_rate, size);
1398 ZD_ASSERT(r >= 0);
1399 if (r < 0)
1400 r = 0;
1401
1402 r = (r * 100)/29;
1403 return r <= 100 ? r : 100;
1404}
1405
1406static unsigned int log10times100(unsigned int x)
1407{
1408 static const u8 log10[] = {
1409 0,
1410 0, 30, 47, 60, 69, 77, 84, 90, 95, 100,
1411 104, 107, 111, 114, 117, 120, 123, 125, 127, 130,
1412 132, 134, 136, 138, 139, 141, 143, 144, 146, 147,
1413 149, 150, 151, 153, 154, 155, 156, 157, 159, 160,
1414 161, 162, 163, 164, 165, 166, 167, 168, 169, 169,
1415 170, 171, 172, 173, 174, 174, 175, 176, 177, 177,
1416 178, 179, 179, 180, 181, 181, 182, 183, 183, 184,
1417 185, 185, 186, 186, 187, 188, 188, 189, 189, 190,
1418 190, 191, 191, 192, 192, 193, 193, 194, 194, 195,
1419 195, 196, 196, 197, 197, 198, 198, 199, 199, 200,
1420 200, 200, 201, 201, 202, 202, 202, 203, 203, 204,
1421 204, 204, 205, 205, 206, 206, 206, 207, 207, 207,
1422 208, 208, 208, 209, 209, 210, 210, 210, 211, 211,
1423 211, 212, 212, 212, 213, 213, 213, 213, 214, 214,
1424 214, 215, 215, 215, 216, 216, 216, 217, 217, 217,
1425 217, 218, 218, 218, 219, 219, 219, 219, 220, 220,
1426 220, 220, 221, 221, 221, 222, 222, 222, 222, 223,
1427 223, 223, 223, 224, 224, 224, 224,
1428 };
1429
1430 return x < ARRAY_SIZE(log10) ? log10[x] : 225;
1431}
1432
1433enum {
1434 MAX_CCK_EVM_DB = 45,
1435};
1436
1437static int cck_evm_db(u8 status_quality)
1438{
1439 return (20 * log10times100(status_quality)) / 100;
1440}
1441
1442static int cck_snr_db(u8 status_quality)
1443{
1444 int r = MAX_CCK_EVM_DB - cck_evm_db(status_quality);
1445 ZD_ASSERT(r >= 0);
1446 return r;
1447}
1448
1449static int cck_qual_percent(u8 status_quality)
1450{
1451 int r;
1452
1453 r = cck_snr_db(status_quality);
1454 r = (100*r)/17;
1455 return r <= 100 ? r : 100;
1456}
1457
1458static inline u8 zd_rate_from_ofdm_plcp_header(const void *rx_frame) 1329static inline u8 zd_rate_from_ofdm_plcp_header(const void *rx_frame)
1459{ 1330{
1460 return ZD_OFDM | zd_ofdm_plcp_header_rate(rx_frame); 1331 return ZD_OFDM | zd_ofdm_plcp_header_rate(rx_frame);
1461} 1332}
1462 1333
1463u8 zd_rx_qual_percent(const void *rx_frame, unsigned int size,
1464 const struct rx_status *status)
1465{
1466 return (status->frame_status&ZD_RX_OFDM) ?
1467 ofdm_qual_percent(status->signal_quality_ofdm,
1468 zd_rate_from_ofdm_plcp_header(rx_frame),
1469 size) :
1470 cck_qual_percent(status->signal_quality_cck);
1471}
1472
1473/** 1334/**
1474 * zd_rx_rate - report zd-rate 1335 * zd_rx_rate - report zd-rate
1475 * @rx_frame - received frame 1336 * @rx_frame - received frame