board: ti: am335x: Choose CPSW or PRUSS configuration based on jumper setting
The am335x-ice-v2 board's Ethernet ports can be configured
in 'MII' or 'RMII' mode to be connected to 'PRUSS' or 'CPSW'
Ethernet subsystems.
This patch sets the environment variable 'ice_mii' to
'mii' or 'rmii' accordingly. Based on that we choose the
appropriate board devicetree i.e. 'am335x-ice-v2.dtb' or
'am335x-ice-v2-prueth.dtb'.
Since there are 2 Ethernet ports with 2 modes, there can be 4
configurations but for now we consider both ports in different modes
to be an invalid configuration and prevent boot in that case.
Signed-off-by: Roger Quadros <rogerq@ti.com>
[Amjad: use overlay instead of using new am335x-ice-v2-prueth.dtb]
Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Make prueth_is_mii be marked __maybe_unused]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index e8555de..9b70670 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -11,6 +11,7 @@
#include <dm.h>
#include <env.h>
#include <errno.h>
+#include <hang.h>
#include <image.h>
#include <init.h>
#include <malloc.h>
@@ -38,6 +39,7 @@
#include <miiphy.h>
#include <cpsw.h>
#include <linux/bitops.h>
+#include <linux/compiler.h>
#include <linux/delay.h>
#include <power/tps65217.h>
#include <power/tps65910.h>
@@ -691,6 +693,8 @@
}
#endif
+static bool __maybe_unused prueth_is_mii = true;
+
/*
* Basic board specific setup. Pinmux has been handled already.
*/
@@ -710,6 +714,8 @@
if (board_is_icev2()) {
int rv;
u32 reg;
+ bool eth0_is_mii = true;
+ bool eth1_is_mii = true;
REQUEST_AND_SET_GPIO(GPIO_PR1_MII_CTRL);
/* Make J19 status available on GPIO1_26 */
@@ -740,6 +746,7 @@
writel(reg, GPIO0_IRQSTATUS1); /* clear irq */
/* RMII mode */
printf("ETH0, CPSW\n");
+ eth0_is_mii = false;
} else {
/* MII mode */
printf("ETH0, PRU\n");
@@ -752,12 +759,21 @@
/* RMII mode */
printf("ETH1, CPSW\n");
gpio_set_value(GPIO_MUX_MII_CTRL, 1);
+ eth1_is_mii = false;
} else {
/* MII mode */
printf("ETH1, PRU\n");
cdce913_data.pdiv2 = 4; /* 25MHz PHY clk */
}
+ if (eth0_is_mii != eth1_is_mii) {
+ printf("Unsupported Ethernet port configuration\n");
+ printf("Both ports must be set as RMII or MII\n");
+ hang();
+ }
+
+ prueth_is_mii = eth0_is_mii;
+
/* disable rising edge IRQs */
reg = readl(GPIO0_RISINGDETECT) & ~BIT(11);
writel(reg, GPIO0_RISINGDETECT);
@@ -852,6 +868,8 @@
if (is_valid_ethaddr(mac_addr))
eth_env_set_enetaddr("eth1addr", mac_addr);
}
+
+ env_set("ice_mii", prueth_is_mii ? "mii" : "rmii");
#endif
if (!env_get("serial#")) {