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fec_mxc: add MX25 support 

Use RMII for MX25
Add code to init gasket that enables RMII

Signed-off-by: John Rigby <jcrigby@gmail.com>
CC: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
John Rigby 2010-01-25 23:12:57 -07:00 committed by Tom Rix
parent cb17b92de0
commit 740d6ae5b9
3 changed files with 60 additions and 2 deletions
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31
drivers/net/fec_mxc.c
View File

@ -367,6 +367,34 @@ static int fec_open(struct eth_device *edev)
*/
writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_ETHER_EN,
&fec->eth->ecntrl);
#ifdef CONFIG_MX25
udelay(100);
/*
* setup the MII gasket for RMII mode
*/
/* disable the gasket */
writew(0, &fec->eth->miigsk_enr);
/* wait for the gasket to be disabled */
while (readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY)
udelay(2);
/* configure gasket for RMII, 50 MHz, no loopback, and no echo */
writew(MIIGSK_CFGR_IF_MODE_RMII, &fec->eth->miigsk_cfgr);
/* re-enable the gasket */
writew(MIIGSK_ENR_EN, &fec->eth->miigsk_enr);
/* wait until MII gasket is ready */
int max_loops = 10;
while ((readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY) == 0) {
if (--max_loops <= 0) {
printf("WAIT for MII Gasket ready timed out\n");
break;
}
}
#endif
miiphy_wait_aneg(edev);
miiphy_speed(edev->name, CONFIG_FEC_MXC_PHYADDR);
@ -513,7 +541,8 @@ static void fec_halt(struct eth_device *dev)
* Disable the Ethernet Controller
* Note: this will also reset the BD index counter!
*/
writel(readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_ETHER_EN, &fec->eth->ecntrl);
writel(readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_ETHER_EN,
&fec->eth->ecntrl);
fec->rbd_index = 0;
fec->tbd_index = 0;
debug("eth_halt: done\n");

30
drivers/net/fec_mxc.h
View File

@ -145,9 +145,17 @@ struct ethernet_regs {
uint32_t r_fdxfc; /* MBAR_ETH + 0x2DC */
uint32_t ieee_r_octets_ok; /* MBAR_ETH + 0x2E0 */
uint32_t res14[6]; /* MBAR_ETH + 0x2E4-2FC */
uint32_t res14[7]; /* MBAR_ETH + 0x2E4-2FC */
#ifdef CONFIG_MX25
uint16_t miigsk_cfgr; /* MBAR_ETH + 0x300 */
uint16_t res15[3]; /* MBAR_ETH + 0x302-306 */
uint16_t miigsk_enr; /* MBAR_ETH + 0x308 */
uint16_t res16[3]; /* MBAR_ETH + 0x30a-30e */
uint32_t res17[60]; /* MBAR_ETH + 0x300-3FF */
#else
uint32_t res15[64]; /* MBAR_ETH + 0x300-3FF */
#endif
};
#define FEC_IEVENT_HBERR 0x80000000
@ -196,6 +204,26 @@ struct ethernet_regs {
#define FEC_ECNTRL_RESET 0x00000001 /* reset the FEC */
#define FEC_ECNTRL_ETHER_EN 0x00000002 /* enable the FEC */
#ifdef CONFIG_MX25
/* defines for MIIGSK */
/* RMII frequency control: 0=50MHz, 1=5MHz */
#define MIIGSK_CFGR_FRCONT (1 << 6)
/* loopback mode */
#define MIIGSK_CFGR_LBMODE (1 << 4)
/* echo mode */
#define MIIGSK_CFGR_EMODE (1 << 3)
/* MII gasket mode field */
#define MIIGSK_CFGR_IF_MODE_MASK (3 << 0)
/* MMI/7-Wire mode */
#define MIIGSK_CFGR_IF_MODE_MII (0 << 0)
/* RMII mode */
#define MIIGSK_CFGR_IF_MODE_RMII (1 << 0)
/* reflects MIIGSK Enable bit (RO) */
#define MIIGSK_ENR_READY (1 << 2)
/* enable MIGSK (set by default) */
#define MIIGSK_ENR_EN (1 << 1)
#endif
/**
* @brief Descriptor buffer alignment
*

1
include/asm-arm/arch-mx25/clock.h
View File

@ -30,6 +30,7 @@ ulong imx_get_perclk(int clk);
ulong imx_get_ahbclk(void);
#define imx_get_uartclk() imx_get_perclk(15)
#define imx_get_fecclk() (imx_get_ahbclk()/2)
#endif /* __ASM_ARCH_CLOCK_H */