Re: [U-Boot] Issues coupling am335x with VSC8601 PHY
On 11/05/2016 12:07 AM, Alex wrote:
Hi,
I'm trying to enable ethernet on a custom board with an am335x soc, and
a VSC8601 connected through RGMII. The plan is to use u-boot as a first
stage loader to load a proprietary application (called "the app"). The
app already has its own ethernet stack and drivers, and can successfully
do network talk.
Okay, we solved it -- sort of. I learned the hard way that the
EEPROM-based config mechanism in SPL chose to not configure anything --
no clocks, no PMIC. Once we got that hacked out[1], the ethernet started
graciously working.
There isn't an EEPROM on these boards. Other than hacking a bunch of if
statements, is there another mechanism to get the proper DDR, pinmux,
PMIC, and clock configuration in SPL
Alex
[1]
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index fc1353a..159def3 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -254,7 +254,7 @@ void am33xx_spl_board_init(void)
/* Get the frequency */
dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
- if (board_is_bone() || board_is_bone_lt()) {
+ if (1 || board_is_bone() || board_is_bone_lt()) {
/* BeagleBone PMIC Code */
int usb_cur_lim;
@@ -262,7 +262,7 @@ void am33xx_spl_board_init(void)
* Only perform PMIC configurations if board rev > A1
* on Beaglebone White
*/
- if (board_is_bone() && !strncmp(board_ti_get_rev(),
"00A1", 4))
+ if (0 &&( board_is_bone() &&
!strncmp(board_ti_get_rev(), "00A1", 4)))
return;
if (i2c_probe(TPS65217_CHIP_PM))
@@ -328,7 +328,7 @@ void am33xx_spl_board_init(void)
* Set LDO3, LDO4 output voltage to 3.3V for Beaglebone.
* Set LDO3 to 1.8V and LDO4 to 3.3V for Beaglebone Black.
*/
- if (board_is_bone()) {
+ if (1 || board_is_bone()) {
if (tps65217_reg_write(TPS65217_PROT_LEVEL_2,
TPS65217_DEFLS1,
TPS65217_LDO_VOLTAGE_OUT_3_3,
diff --git a/board/ti/am335x/mux.c b/board/ti/am335x/mux.c
index 27979bd..e758429 100644
--- a/board/ti/am335x/mux.c
+++ b/board/ti/am335x/mux.c
@@ -352,7 +352,7 @@ void enable_board_pin_mux(void)
#else
configure_module_pin_mux(mmc1_pin_mux);
#endif
- } else if (board_is_gp_evm()) {
+ } else if (1 || board_is_gp_evm()) {
/* General Purpose EVM */
unsigned short profile = detect_daughter_board_profile();
configure_module_pin_mux(rgmii1_pin_mux);
___
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[U-Boot] Issues coupling am335x with VSC8601 PHY
Hi,
I'm trying to enable ethernet on a custom board with an am335x soc, and
a VSC8601 connected through RGMII. The plan is to use u-boot as a first
stage loader to load a proprietary application (called "the app"). The
app already has its own ethernet stack and drivers, and can successfully
do network talk.
I started with the am3355x config, and with a few trivial hacks, [1],
[2], and [3], I was able to get the PHY recognized in u-boot.
Auto-negotiation works correctly on 100Mbit link.
The issue is that while packets seem to get transmitted when doing DHCP
queries (light on the switch blinks), they aren't legible. I tried
hooking up the board to an ethernet port with static IPs, and watching
traffic with wireshark, but did not observe any packets.
I also probed the RGMII link and it seems the TX clock is running at 10
MHz, instead of 25MHz, when the app is running. At this point I suspect
either a gross misconfiguration on my part, or a bug in the cpsw code.
I was hoping someone here might have an idea what to do to get ethernet
working.
Thanks,
Alex
[1]
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index ec70b72..63a5b29 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -433,6 +433,7 @@
#define CONFIG_PHY_SMSC
/* Enable Atheros phy driver */
#define CONFIG_PHY_ATHEROS
+#define CONFIG_PHY_VITESSE
/*
* NOR Size = 16 MiB
[2]
diff --git a/arch/arm/dts/am335x-evm.dts b/arch/arm/dts/am335x-evm.dts
index c1a53e2..153a06f 100644
--- a/arch/arm/dts/am335x-evm.dts
+++ b/arch/arm/dts/am335x-evm.dts
@@ -585,8 +585,8 @@
};
_emac0 {
- phy_id = <_mdio>, <0>;
- phy-mode = "rgmii-txid";
+ phy_id = <_mdio>, <8>;
+ phy-mode = "rgmii";
};
_emac1 {
[3]
diff --git a/board/ti/am335x/mux.c b/board/ti/am335x/mux.c
index 27979bd..e758429 100644
--- a/board/ti/am335x/mux.c
+++ b/board/ti/am335x/mux.c
@@ -341,7 +341,7 @@ static unsigned short
detect_daughter_board_profile(void)
void enable_board_pin_mux(void)
{
/* Do board-specific muxes. */
- if (board_is_bone()) {
+ if (0 && board_is_bone()) {
/* Beaglebone pinmux */
configure_module_pin_mux(mii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
@@ -352,7 +352,7 @@ void enable_board_pin_mux(void)
#else
configure_module_pin_mux(mmc1_pin_mux);
#endif
- } else if (board_is_gp_evm()) {
+ } else if (1 || board_is_gp_evm()) {
/* General Purpose EVM */
unsigned short profile = detect_daughter_board_profile();
configure_module_pin_mux(rgmii1_pin_mux);
___
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