diff options
Diffstat (limited to 'package/kernel/mac80211/patches/rt2x00/994-rt2x00-import-support-for-external-LNA-on-MT7620.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/rt2x00/994-rt2x00-import-support-for-external-LNA-on-MT7620.patch | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/rt2x00/994-rt2x00-import-support-for-external-LNA-on-MT7620.patch b/package/kernel/mac80211/patches/rt2x00/994-rt2x00-import-support-for-external-LNA-on-MT7620.patch new file mode 100644 index 0000000000..deaa03be6c --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/994-rt2x00-import-support-for-external-LNA-on-MT7620.patch @@ -0,0 +1,161 @@ +From 0fce1109f894ec7fcd72cb098843a1eff786716a Mon Sep 17 00:00:00 2001 +From: Daniel Golle <daniel@makrotopia.org> +Date: Fri, 16 Sep 2022 20:49:42 +0100 +Subject: [PATCH 16/16] rt2x00: import support for external LNA on MT7620 +To: linux-wireless@vger.kernel.org, + Stanislaw Gruszka <stf_xl@wp.pl>, + Helmut Schaa <helmut.schaa@googlemail.com> +Cc: Kalle Valo <kvalo@kernel.org>, + David S. Miller <davem@davemloft.net>, + Eric Dumazet <edumazet@google.com>, + Jakub Kicinski <kuba@kernel.org>, + Paolo Abeni <pabeni@redhat.com>, + Johannes Berg <johannes.berg@intel.com> + +In order to carry out calibration on boards with ePA or eLNA the PA pin +needs to be switch to GPIO mode on MT7620. Implement that by selecting +pinctrl state "pa_gpio" which should be defined for MT7620 boards with +eLNA or ePA beside the "default" state. + +Reported-by: Serge Vasilugin <vasilugin@yandex.ru> +Signed-off-by: Daniel Golle <daniel@makrotopia.org> +--- + .../net/wireless/ralink/rt2x00/rt2800lib.c | 58 +++++++++++++++++++ + drivers/net/wireless/ralink/rt2x00/rt2x00.h | 5 ++ + .../net/wireless/ralink/rt2x00/rt2x00soc.c | 15 +++++ + 3 files changed, 78 insertions(+) + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +@@ -304,6 +304,24 @@ static void rt2800_rf_write(struct rt2x0 + mutex_unlock(&rt2x00dev->csr_mutex); + } + ++void rt6352_enable_pa_pin(struct rt2x00_dev *rt2x00dev, int enable) ++{ ++ if (!rt2x00dev->pinctrl) ++ return; ++ ++ if (enable) { ++ if (!rt2x00dev->pins_default) ++ return; ++ ++ pinctrl_select_state(rt2x00dev->pinctrl, rt2x00dev->pins_default); ++ } else { ++ if (!rt2x00dev->pins_pa_gpio) ++ return; ++ ++ pinctrl_select_state(rt2x00dev->pinctrl, rt2x00dev->pins_pa_gpio); ++ } ++} ++ + static const unsigned int rt2800_eeprom_map[EEPROM_WORD_COUNT] = { + [EEPROM_CHIP_ID] = 0x0000, + [EEPROM_VERSION] = 0x0001, +@@ -4469,6 +4487,29 @@ static void rt2800_config_channel(struct + rt2800_register_write(rt2x00dev, TX1_RF_GAIN_ATTEN, + 0x6C6C6B6C); + } ++ ++ if (rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ reg = rt2800_register_read(rt2x00dev, RF_CONTROL3); ++ reg |= 0x00000101; ++ rt2800_register_write(rt2x00dev, RF_CONTROL3, reg); ++ ++ reg = rt2800_register_read(rt2x00dev, RF_BYPASS3); ++ reg |= 0x00000101; ++ rt2800_register_write(rt2x00dev, RF_BYPASS3, reg); ++ ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 14, 0x66); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 17, 0x20); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 18, 0x42); ++ rt2800_bbp_write(rt2x00dev, 75, 0x68); ++ rt2800_bbp_write(rt2x00dev, 76, 0x4C); ++ rt2800_bbp_write(rt2x00dev, 79, 0x1C); ++ rt2800_bbp_write(rt2x00dev, 80, 0x0C); ++ rt2800_bbp_write(rt2x00dev, 82, 0xB6); ++ /* bank 0 RF reg 42 and glrt BBP reg 141 will be set in ++ * config channel function in dependence of channel and ++ * HT20/HT40 so don't touch it ++ */ ++ } + } + + bbp = rt2800_bbp_read(rt2x00dev, 4); +@@ -10583,6 +10624,7 @@ static void rt2800_init_rfcsr_6352(struc + rt2800_rfcsr_write_dccal(rt2x00dev, 5, 0x00); + rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x7C); + ++ rt6352_enable_pa_pin(rt2x00dev, 0); + rt2800_r_calibration(rt2x00dev); + rt2800_rf_self_txdc_cal(rt2x00dev); + rt2800_rxdcoc_calibration(rt2x00dev); +@@ -10590,6 +10632,22 @@ static void rt2800_init_rfcsr_6352(struc + rt2800_bw_filter_calibration(rt2x00dev, false); + rt2800_loft_iq_calibration(rt2x00dev); + rt2800_rxiq_calibration(rt2x00dev); ++ rt6352_enable_pa_pin(rt2x00dev, 1); ++ ++ if (rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 14, 0x66); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 17, 0x20); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 18, 0x42); ++ rt2800_bbp_write(rt2x00dev, 75, 0x68); ++ rt2800_bbp_write(rt2x00dev, 76, 0x4C); ++ rt2800_bbp_write(rt2x00dev, 79, 0x1C); ++ rt2800_bbp_write(rt2x00dev, 80, 0x0C); ++ rt2800_bbp_write(rt2x00dev, 82, 0xB6); ++ /* bank 0 RF reg 42 and glrt BBP reg 141 will be set in config ++ * channel function in dependence of channel and HT20/HT40, ++ * so don't touch them here. ++ */ ++ } + } + + static void rt2800_init_rfcsr(struct rt2x00_dev *rt2x00dev) +--- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h ++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h +@@ -28,6 +28,7 @@ + #include <linux/average.h> + #include <linux/usb.h> + #include <linux/clk.h> ++#include <linux/pinctrl/consumer.h> + #include <linux/rt2x00_platform.h> + + #include <net/mac80211.h> +@@ -1029,6 +1030,11 @@ struct rt2x00_dev { + + /* Clock for System On Chip devices. */ + struct clk *clk; ++ ++ /* pinctrl and states for System On Chip devices with PA/LNA. */ ++ struct pinctrl *pinctrl; ++ struct pinctrl_state *pins_default; ++ struct pinctrl_state *pins_pa_gpio; + }; + + struct rt2x00_bar_list_entry { +--- a/drivers/net/wireless/ralink/rt2x00/rt2x00soc.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00soc.c +@@ -97,6 +97,21 @@ int rt2x00soc_probe(struct platform_devi + if (retval) + goto exit_free_reg; + ++ rt2x00dev->pinctrl = devm_pinctrl_get(&pdev->dev); ++ if (IS_ERR(rt2x00dev->pinctrl)) { ++ rt2x00dev->pinctrl = NULL; ++ rt2x00dev->pins_default = NULL; ++ rt2x00dev->pins_pa_gpio = NULL; ++ } else { ++ rt2x00dev->pins_default = pinctrl_lookup_state(rt2x00dev->pinctrl, "default"); ++ if (IS_ERR(rt2x00dev->pins_default)) ++ rt2x00dev->pins_default = NULL; ++ ++ rt2x00dev->pins_pa_gpio = pinctrl_lookup_state(rt2x00dev->pinctrl, "pa_gpio"); ++ if (IS_ERR(rt2x00dev->pins_pa_gpio)) ++ rt2x00dev->pins_pa_gpio = NULL; ++ } ++ + return 0; + + exit_free_reg: |