From: Yegor Yefremov yegorslists@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@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 */\