From 0586a11b5cc51413240e6688936e2edac9c2918e Mon Sep 17 00:00:00 2001 From: Anisse Astier Date: Mon, 23 Apr 2012 12:33:11 +0200 Subject: [PATCH] rt2800: add chipset revision RT5390R support About 70% of the chips with revision RT5390R initialize incorrectly, using the auxiliary antenna instead of the main one. The net result is that signal reception is very poor (no AP further than 1M). This chipset differs from RT5390 and RT5390F by its support of hardware antenna diversity. Therefore antenna selection should be done differently, by disabling software features and previously selected antenna. This changeset does just that, and makes all RT5390R work properly. This is based on Ralink's 2012_03_22_RT5572_Linux_STA_v2.6.0.0_DPO driver. Signed-off-by: Anisse Astier Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2800.h | 1 + drivers/net/wireless/rt2x00/rt2800lib.c | 12 ++++++++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h index 1c4d75004627..d91f4f628f65 100644 --- a/drivers/net/wireless/rt2x00/rt2800.h +++ b/drivers/net/wireless/rt2x00/rt2800.h @@ -83,6 +83,7 @@ #define REV_RT3090E 0x0211 #define REV_RT3390E 0x0211 #define REV_RT5390F 0x0502 +#define REV_RT5390R 0x1502 /* * Signal information. diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index bd1980202f19..1cd16b416024 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -3356,6 +3356,13 @@ static int rt2800_init_bbp(struct rt2x00_dev *rt2x00dev) rt2800_register_write(rt2x00dev, GPIO_CTRL_CFG, reg); } + /* This chip has hardware antenna diversity*/ + if (rt2x00_rt_rev_gte(rt2x00dev, RT5390, REV_RT5390R)) { + rt2800_bbp_write(rt2x00dev, 150, 0); /* Disable Antenna Software OFDM */ + rt2800_bbp_write(rt2x00dev, 151, 0); /* Disable Antenna Software CCK */ + rt2800_bbp_write(rt2x00dev, 154, 0); /* Clear previously selected antenna */ + } + rt2800_bbp_read(rt2x00dev, 152, &value); if (ant == 0) rt2x00_set_field8(&value, BBP152_RX_DEFAULT_ANT, 1); @@ -4291,6 +4298,11 @@ int rt2800_init_eeprom(struct rt2x00_dev *rt2x00dev) rt2x00dev->default_ant.rx = ANTENNA_A; } + if (rt2x00_rt_rev_gte(rt2x00dev, RT5390, REV_RT5390R)) { + rt2x00dev->default_ant.tx = ANTENNA_HW_DIVERSITY; /* Unused */ + rt2x00dev->default_ant.rx = ANTENNA_HW_DIVERSITY; /* Unused */ + } + /* * Determine external LNA informations. */