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net fec: Add i.MX6 support 

Currently only 100Mb/s is tested. Freescale's U-Boot suggests that
there are some additional adjustments necessary for Gigabit support.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2012-04-12 23:21:18 +02:00
parent e0c18c0866
commit 86cfd96af4
2 changed files with 23 additions and 3 deletions
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25
drivers/net/fec_imx.c
View File

@ -274,7 +274,7 @@ static int fec_set_hwaddr(struct eth_device *dev, unsigned char *mac)
static int fec_init(struct eth_device *dev)
{
struct fec_priv *fec = (struct fec_priv *)dev->priv;
u32 rcntl;
u32 rcntl, xwmrk;
/*
* Clear FEC-Lite interrupt event register(IEVENT)
@ -317,13 +317,25 @@ static int fec_init(struct eth_device *dev)
writel(FEC_MIIGSK_ENR_EN, fec->regs + FEC_MIIGSK_ENR);
}
}
if (fec->xcv_type == RGMII)
rcntl |= 1 << 6;
writel(rcntl, fec->regs + FEC_R_CNTRL);
/*
* Set Opcode/Pause Duration Register
*/
writel(0x00010020, fec->regs + FEC_OP_PAUSE);
writel(0x2, fec->regs + FEC_X_WMRK);
xwmrk = 0x2;
/* set ENET tx at store and forward mode */
if (cpu_is_mx6())
xwmrk |= 1 << 8;
writel(xwmrk, fec->regs + FEC_X_WMRK);
/*
* Set multicast address filter
*/
@ -349,6 +361,7 @@ static int fec_open(struct eth_device *edev)
{
struct fec_priv *fec = (struct fec_priv *)edev->priv;
int ret;
u32 ecr;
/*
* Initialize RxBD/TxBD rings
@ -363,7 +376,13 @@ static int fec_open(struct eth_device *edev)
/*
* Enable FEC-Lite controller
*/
writel(FEC_ECNTRL_ETHER_EN, fec->regs + FEC_ECNTRL);
ecr = FEC_ECNTRL_ETHER_EN;
/* Enable Swap to support little-endian device */
if (cpu_is_mx6())
ecr |= 0x100;
writel(ecr, fec->regs + FEC_ECNTRL);
/*
* Enable SmartDMA receive task
*/

1
include/fec.h
View File

@ -33,6 +33,7 @@ typedef enum {
MII10,
MII100,
RMII,
RGMII,
} xceiver_type;
/*