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 <rabeeh@solid-run.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Tested-by: Chris Packham <judge.packham@gmail.com>
Tested-by: Mario Six <mario.six@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>

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 13553cf96008864db115d35d6debcdb22f2dbda1..33e70569bc480a459099c39256a67ca97284dcb9 100644 (file)
--- 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 953445b7d7aeb9bd02eca3d8c42631529e1d0382..50b235826659d500bb3d30604d536d924293dd03 100644 (file)
--- 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