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rt2x00: Rework rt73 antenna selection 

This patch changes rt73 antenna selection to what I believe is the correct way.
It also fixes a small selection bug that switched the antennas by accident.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mattias Nissler 2007-10-27 13:42:37 +02:00 committed by David S. Miller
parent 50794638dc
commit 2676c94d4e
2 changed files with 33 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/net/wireless/rt2x00/rt73usb.c
View File

@ -399,6 +399,7 @@ static void rt73usb_config_antenna_5x(struct rt2x00_dev *rt2x00dev,
u8 r3;
u8 r4;
u8 r77;
u8 temp;
rt73usb_bbp_read(rt2x00dev, 3, &r3);
rt73usb_bbp_read(rt2x00dev, 4, &r4);
@ -406,38 +407,23 @@ static void rt73usb_config_antenna_5x(struct rt2x00_dev *rt2x00dev,
rt2x00_set_field8(&r3, BBP_R3_SMART_MODE, 0);
/*
* Configure the TX antenna.
*/
switch (ant->tx) {
case ANTENNA_A:
rt2x00_set_field8(&r77, BBP_R77_TX_ANTENNA, 0);
break;
case ANTENNA_SW_DIVERSITY:
case ANTENNA_HW_DIVERSITY:
/*
* NOTE: We should never come here because rt2x00lib is
* supposed to catch this and send us the correct antenna
* explicitely. However we are nog going to bug about this.
* Instead, just default to antenna B.
*/
case ANTENNA_B:
rt2x00_set_field8(&r77, BBP_R77_TX_ANTENNA, 3);
break;
}
/*
* Configure the RX antenna.
*/
switch (ant->rx) {
case ANTENNA_HW_DIVERSITY:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 2);
rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
(rt2x00dev->curr_hwmode != HWMODE_A));
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 2);
temp = !test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags)
&& (rt2x00dev->curr_hwmode != HWMODE_A);
rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END, temp);
break;
case ANTENNA_A:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END, 0);
if (rt2x00dev->curr_hwmode == HWMODE_A)
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 0);
else
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 3);
break;
case ANTENNA_SW_DIVERSITY:
/*
@ -447,8 +433,12 @@ static void rt73usb_config_antenna_5x(struct rt2x00_dev *rt2x00dev,
* Instead, just default to antenna B.
*/
case ANTENNA_B:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END, 0);
if (rt2x00dev->curr_hwmode == HWMODE_A)
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 3);
else
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 0);
break;
}
@ -472,35 +462,16 @@ static void rt73usb_config_antenna_2x(struct rt2x00_dev *rt2x00dev,
rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
!test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
/*
* Configure the TX antenna.
*/
switch (ant->tx) {
case ANTENNA_A:
rt2x00_set_field8(&r77, BBP_R77_TX_ANTENNA, 0);
break;
case ANTENNA_SW_DIVERSITY:
case ANTENNA_HW_DIVERSITY:
/*
* NOTE: We should never come here because rt2x00lib is
* supposed to catch this and send us the correct antenna
* explicitely. However we are nog going to bug about this.
* Instead, just default to antenna B.
*/
case ANTENNA_B:
rt2x00_set_field8(&r77, BBP_R77_TX_ANTENNA, 3);
break;
}
/*
* Configure the RX antenna.
*/
switch (ant->rx) {
case ANTENNA_HW_DIVERSITY:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 2);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 2);
break;
case ANTENNA_A:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 3);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
break;
case ANTENNA_SW_DIVERSITY:
/*
@ -510,7 +481,8 @@ static void rt73usb_config_antenna_2x(struct rt2x00_dev *rt2x00dev,
* Instead, just default to antenna B.
*/
case ANTENNA_B:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 0);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
break;
}
@ -558,8 +530,6 @@ static void rt73usb_config_antenna(struct rt2x00_dev *rt2x00dev,
unsigned int i;
u32 reg;
rt73usb_register_read(rt2x00dev, PHY_CSR0, &reg);
if (rt2x00dev->curr_hwmode == HWMODE_A) {
sel = antenna_sel_a;
lna = test_bit(CONFIG_EXTERNAL_LNA_A, &rt2x00dev->flags);
@ -568,15 +538,17 @@ static void rt73usb_config_antenna(struct rt2x00_dev *rt2x00dev,
lna = test_bit(CONFIG_EXTERNAL_LNA_BG, &rt2x00dev->flags);
}
for (i = 0; i < ARRAY_SIZE(antenna_sel_a); i++)
rt73usb_bbp_write(rt2x00dev, sel[i].word, sel[i].value[lna]);
rt73usb_register_read(rt2x00dev, PHY_CSR0, &reg);
rt2x00_set_field32(&reg, PHY_CSR0_PA_PE_BG,
(rt2x00dev->curr_hwmode == HWMODE_B ||
rt2x00dev->curr_hwmode == HWMODE_G));
rt2x00_set_field32(&reg, PHY_CSR0_PA_PE_A,
(rt2x00dev->curr_hwmode == HWMODE_A));
for (i = 0; i < ARRAY_SIZE(antenna_sel_a); i++)
rt73usb_bbp_write(rt2x00dev, sel[i].word, sel[i].value[lna]);
rt73usb_register_write(rt2x00dev, PHY_CSR0, reg);
if (rt2x00_rf(&rt2x00dev->chip, RF5226) ||

10
drivers/net/wireless/rt2x00/rt73usb.h
View File

@ -713,13 +713,19 @@ struct hw_pairwise_ta_entry {
* R4: RX antenna control
* FRAME_END: 1 - DPDT, 0 - SPDT (Only valid for 802.11G, RF2527 & RF2529)
*/
#define BBP_R4_RX_ANTENNA FIELD8(0x03)
/*
* ANTENNA_CONTROL semantics (guessed):
* 0x1: Software controlled antenna switching (fixed or SW diversity)
* 0x2: Hardware diversity.
*/
#define BBP_R4_RX_ANTENNA_CONTROL FIELD8(0x03)
#define BBP_R4_RX_FRAME_END FIELD8(0x20)
/*
* R77
*/
#define BBP_R77_TX_ANTENNA FIELD8(0x03)
#define BBP_R77_RX_ANTENNA FIELD8(0x03)
/*
* RF registers