Hi,
We are unable to set RMII mode in CPSW of ti8148. please help on this.
U-boot version used: u-boot-2010.06-psp04.01.00.05
To set CPSW pad config for RMII mode, we did the following steps:
To set CPSW pad config for RMII mode, we did the following steps:
We do pin muxing for RMII mode based on board/ti/ti8148/mux.h (below code is the RMII pin select part) from function set_muxconf_regs()
/* -232 */ BIT(0), BIT(0), BIT(0), BIT(0), /* 232- EMAC_RMREFCLK */
/* -236 */ BIT(0), BIT(0), BIT(0), BIT(2), /* 236- EMAC[0]_RMRXD[0] */
/* -240 */ BIT(2), BIT(2), BIT(2), BIT(2), /* 237- EMAC[0]_RMRXD[1], 238- EMAC[0]_RMRXER, 239- EMAC[0]_RMCRSDV, 240- EMAC[0]_RMTXD[0] */
/* -244 */ BIT(2), BIT(2), BIT(0), BIT(0), /* 241- EMAC[0]_RMTXD[1], 242- EMAC[0]_RMTXEN */
To setup RMII_REFCLK to be sourced from audio_pll, we made CPSW mac clock as given below
if (PG2_1 == get_cpu_rev()) {
/* setup RMII_REFCLK to be sourced from audio_pll */
__raw_writel(0x5,RMII_REFCLK_SRC);
/*program GMII_SEL register for RGMII mode */
/*__raw_writel(0x30a,GMII_SEL);*/ /* This is removed as per the assumption, it is for RGMII mode */
}
/* setup RMII_REFCLK to be sourced from audio_pll */
__raw_writel(0x5,RMII_REFCLK_SRC);
/*program GMII_SEL register for RGMII mode */
/*__raw_writel(0x30a,GMII_SEL);*/ /* This is removed as per the assumption, it is for RGMII mode */
}
In the structure cpsw_data (board/ti/ti8148/evm.c), mac_control element is set as given below
.mac_control = BIT(5) /* MIIEN */
we are using MICREL KSZ8051RNL PHY , so in the phy_init() function, MICREL supplied init function is used (phy_micrel_init()).
Thanks and Regards
Jerryn
