[U-Boot] [PATCH v2] am3517_evm: activate Ethernet PHY
yegorslists at googlemail.com
yegorslists at googlemail.com
Fri Dec 6 10:19:22 CET 2013
From: Yegor Yefremov <yegorslists at googlemail.com>
Pin 30 is connected to PHY's RESET# signal, so it must be
put to high. Otherwise PHY won't be found via MDIO interface.
Signed-off-by: Yegor Yefremov <yegorslists at googlemail.com>
---
Changes:
v2: put ctr and reset under #if defined statement. to avoid compilerwarnigs, when EMAC is not selected
board/logicpd/am3517evm/am3517evm.c | 36 +++++++++++++++++++++++++++++++++++
board/logicpd/am3517evm/am3517evm.h | 2 +-
2 files changed, 37 insertions(+), 1 deletions(-)
diff --git a/board/logicpd/am3517evm/am3517evm.c b/board/logicpd/am3517evm/am3517evm.c
index 1569905..a917a03 100644
--- a/board/logicpd/am3517evm/am3517evm.c
+++ b/board/logicpd/am3517evm/am3517evm.c
@@ -22,6 +22,7 @@
#include <asm/arch/musb.h>
#include <asm/mach-types.h>
#include <asm/errno.h>
+#include <asm/gpio.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/musb.h>
@@ -31,6 +32,9 @@
DECLARE_GLOBAL_DATA_PTR;
+#define AM3517_IP_SW_RESET 0x48002598
+#define CPGMACSS_SW_RST (1 << 1)
+
/*
* Routine: board_init
* Description: Early hardware init.
@@ -98,6 +102,11 @@ static void am3517_evm_musb_init(void)
*/
int misc_init_r(void)
{
+#if defined(CONFIG_DRIVER_TI_EMAC)
+ volatile unsigned int ctr;
+ u32 reset;
+#endif
+
#ifdef CONFIG_SYS_I2C_OMAP34XX
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
#endif
@@ -106,6 +115,33 @@ int misc_init_r(void)
am3517_evm_musb_init();
+#if defined(CONFIG_DRIVER_TI_EMAC)
+ /* activate PHY reset */
+ gpio_direction_output(30, 0);
+ gpio_set_value(30, 0);
+
+ ctr = 0;
+ do {
+ udelay(1000);
+ ctr++;
+ } while (ctr < 300);
+
+ /* deactivate PHY reset */
+ gpio_set_value(30, 1);
+
+ /* allow the PHY to stabilize and settle down */
+ ctr = 0;
+ do {
+ udelay(1000);
+ ctr++;
+ } while (ctr < 300);
+
+ /* ensure that the module is out of reset */
+ reset = readl(AM3517_IP_SW_RESET);
+ reset &= (~CPGMACSS_SW_RST);
+ writel(reset,AM3517_IP_SW_RESET);
+#endif
+
return 0;
}
diff --git a/board/logicpd/am3517evm/am3517evm.h b/board/logicpd/am3517evm/am3517evm.h
index 704af84..d407d66 100644
--- a/board/logicpd/am3517evm/am3517evm.h
+++ b/board/logicpd/am3517evm/am3517evm.h
@@ -315,7 +315,7 @@ const omap3_sysinfo sysinfo = {
MUX_VAL(CP(SYS_CLKREQ), (IEN | PTD | DIS | M0)) \
MUX_VAL(CP(SYS_NIRQ), (IEN | PTU | EN | M0)) \
/*SYS_nRESWARM */\
- MUX_VAL(CP(SYS_NRESWARM), (IDIS | PTU | DIS | M4)) \
+ MUX_VAL(CP(SYS_NRESWARM), (IDIS | PTU | EN | M4)) \
/* - GPIO30 */\
MUX_VAL(CP(SYS_BOOT0), (IEN | PTD | DIS | M4)) /*GPIO_2*/\
/* - PEN_IRQ */\
--
1.7.7
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