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mac80211: rt2x00: add incomplete support for external PA on MT7620 

Do as the vendor driver does -- however, some devices apparently
patched support for external PA into the driver similar to how it was
done on Rt3352, using EEPROM_NIC_CONF1 rather than EEPROM_NIC_CONF2,
hence we check for both fields. Somehow the vendor driver also no
longer offers the option of only one of the TX paths having an external
PA (which was probably to weird to ever be implemented in practise,
though it doesn't seem like a particularly bad idea to me). Do the same
in rt2x00 and enable support for external PA on both TX paths whenever
it is set for TX0 in EEPROM.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2017-04-24 01:44:29 +02:00
parent 3d71d1d9a9
commit 61cfc8075b
1 changed files with 125 additions and 0 deletions
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125
package/kernel/mac80211/patches/650-rt2x00-add-support-for-external-PA-on-MT7620.patch Normal file
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@ -0,0 +1,125 @@
From 9782a7f7488443568fa4d6088b73c9aff7eb8510 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Wed, 19 Apr 2017 16:14:53 +0200
Subject: [PATCH] rt2x00: add support for external PA on MT7620
To: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Helmut Schaa <helmut.schaa@googlemail.com>,
linux-wireless@vger.kernel.org,
Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/wireless/ralink/rt2x00/rt2800.h | 1 +
drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 70 +++++++++++++++++++++++++-
2 files changed, 70 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800.h b/drivers/net/wireless/ralink/rt2x00/rt2800.h
index 6a8c93fb6a43..df0cefe44171 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2800.h
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800.h
@@ -2732,6 +2732,7 @@ enum rt2800_eeprom_word {
#define EEPROM_NIC_CONF2_RX_STREAM FIELD16(0x000f)
#define EEPROM_NIC_CONF2_TX_STREAM FIELD16(0x00f0)
#define EEPROM_NIC_CONF2_CRYSTAL FIELD16(0x0600)
+#define EEPROM_NIC_CONF2_EXTERNAL_PA FIELD16(0xc000)
/*
* EEPROM LNA
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
index c06db547b0a4..db431c9544e2 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -3834,6 +3834,61 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
rt2800_iq_calibrate(rt2x00dev, rf->channel);
}
+ if (rt2x00_rt(rt2x00dev, RT6352)) {
+ if (test_bit(CAPABILITY_EXTERNAL_PA_TX0,
+ &rt2x00dev->cap_flags)) {
+ rt2x00_warn(rt2x00dev, "Using incomplete support for " \
+ "external PA\n");
+ rt2800_register_read(rt2x00dev, RF_CONTROL3, &reg);
+ reg |= 0x00000101;
+ rt2800_register_write(rt2x00dev, RF_CONTROL3, reg);
+
+ rt2800_register_read(rt2x00dev, RF_BYPASS3, &reg);
+ reg |= 0x00000101;
+ rt2800_register_write(rt2x00dev, RF_BYPASS3, reg);
+
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 43, 0x73);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 43, 0x73);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 44, 0x73);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 44, 0x73);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 45, 0x73);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 45, 0x73);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 46, 0x27);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 46, 0x27);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 47, 0xC8);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 47, 0xC8);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 48, 0xA4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 48, 0xA4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 49, 0x05);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 49, 0x05);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 54, 0x27);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 54, 0x27);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 55, 0xC8);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 55, 0xC8);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 56, 0xA4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 56, 0xA4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 57, 0x05);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 57, 0x05);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 58, 0x27);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 58, 0x27);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 59, 0xC8);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 59, 0xC8);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 60, 0xA4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 60, 0xA4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 61, 0x05);
+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 61, 0x05);
+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 05, 0x00);
+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 05, 0x00);
+
+ rt2800_register_write(rt2x00dev, TX0_RF_GAIN_CORRECT,
+ 0x36303636);
+ rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN,
+ 0x6C6C6B6C);
+ rt2800_register_write(rt2x00dev, TX1_RF_GAIN_ATTEN,
+ 0x6C6C6B6C);
+ }
+ }
+
rt2800_bbp_read(rt2x00dev, 4, &bbp);
rt2x00_set_field8(&bbp, BBP4_BANDWIDTH, 2 * conf_is_ht40(conf));
rt2800_bbp_write(rt2x00dev, 4, bbp);
@@ -8796,7 +8851,8 @@ static int rt2800_init_eeprom(struct rt2x00_dev *rt2x00dev)
*/
rt2800_eeprom_read(rt2x00dev, EEPROM_NIC_CONF1, &eeprom);
- if (rt2x00_rt(rt2x00dev, RT3352)) {
+ if (rt2x00_rt(rt2x00dev, RT3352) ||
+ rt2x00_rt(rt2x00dev, RT6352)) {
if (rt2x00_get_field16(eeprom,
EEPROM_NIC_CONF1_EXTERNAL_TX0_PA_3352))
__set_bit(CAPABILITY_EXTERNAL_PA_TX0,
@@ -8807,6 +8863,18 @@ static int rt2800_init_eeprom(struct rt2x00_dev *rt2x00dev)
&rt2x00dev->cap_flags);
}
+ rt2800_eeprom_read(rt2x00dev, EEPROM_NIC_CONF2, &eeprom);
+
+ if (rt2x00_rt(rt2x00dev, RT6352) && eeprom != 0 && eeprom != 0xffff) {
+ if (rt2x00_get_field16(eeprom,
+ EEPROM_NIC_CONF2_EXTERNAL_PA)) {
+ __set_bit(CAPABILITY_EXTERNAL_PA_TX0,
+ &rt2x00dev->cap_flags);
+ __set_bit(CAPABILITY_EXTERNAL_PA_TX1,
+ &rt2x00dev->cap_flags);
+ }
+ }
+
return 0;
}
--
2.12.2