From 28be54dc59a038483650bd3c847b5444b371c2d0 Mon Sep 17 00:00:00 2001 From: Rabeeh Khoury Date: Sun, 27 May 2018 18:34:08 +0300 Subject: [PATCH] mvebu: a38x: Force receiver detected on PCIe lanes Some QCA988x based modules presence is not detected by the SERDES lanes, so force this detection which will trigger the LTSSM state machine to negotiate link. An example of such a card is WLE900VX. Signed-off-by: Rabeeh Khoury Signed-off-by: Baruch Siach Tested-by: Chris Packham Tested-by: Mario Six Signed-off-by: Stefan Roese --- arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c | 2 ++ arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h | 1 + 2 files changed, 3 insertions(+) diff --git a/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c b/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c index 13553cf960..33e70569bc 100644 --- a/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c +++ b/arch/arm/mach-mvebu/serdes/a38x/high_speed_env_spec.c @@ -597,6 +597,8 @@ struct op_params pex_electrical_config_serdes_rev2_params[] = { {LANE_CFG4_REG, 0x800, 0x8, {0x8}, 0, 0}, /* tximpcal_th and rximpcal_th */ {VTHIMPCAL_CTRL_REG, 0x800, 0xff00, {0x3000}, 0, 0}, + /* Force receiver detected */ + {LANE_CFG0_REG, 0x800, 0x8000, {0x8000}, 0, 0}, }; /* PEX - configuration seq for REF_CLOCK_25MHz */ diff --git a/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h b/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h index 953445b7d7..50b2358266 100644 --- a/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h +++ b/arch/arm/mach-mvebu/serdes/a38x/sys_env_lib.h @@ -71,6 +71,7 @@ #define RX_REG3 0xa0188 #define PCIE_REG1 0xa0288 #define PCIE_REG3 0xa0290 +#define LANE_CFG0_REG 0xa0600 #define LANE_CFG1_REG 0xa0604 #define LANE_CFG4_REG 0xa0620 #define LANE_CFG5_REG 0xa0624 -- 2.39.5