diff options
Diffstat (limited to 'drivers/net/dm9000x.c')
| -rw-r--r-- | drivers/net/dm9000x.c | 34 |
1 files changed, 31 insertions, 3 deletions
diff --git a/drivers/net/dm9000x.c b/drivers/net/dm9000x.c index c6c24dd..5b00e95 100644 --- a/drivers/net/dm9000x.c +++ b/drivers/net/dm9000x.c @@ -45,6 +45,8 @@ v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>: - Adapt eth_send such that it matches the DM9000* application notes. Needed to make it work properly for DM9000A. + - Adapted reset procedure to match DM9000 application + notes (i.e. double reset) These changes are tested with DM9000{A,EP,E} together with a 200MHz Atmel AT91SAM92161 core @@ -362,9 +364,35 @@ identify_nic(void) static void dm9000_reset(void) { - DM9000_DBG("resetting\n"); - DM9000_iow(DM9000_NCR, NCR_RST); - udelay(1000); /* delay 1ms */ + DM9000_DBG("resetting DM9000\n"); + + /* Reset DM9000, + see DM9000 Application Notes V1.22 Jun 11, 2004 page 29 */ + + /* DEBUG: Make all GPIO pins outputs */ + DM9000_iow(DM9000_GPCR, 0x0F); + /* Step 1: Power internal PHY by writing 0 to GPIO0 pin */ + DM9000_iow(DM9000_GPR, 0); + /* Step 2: Software reset */ + DM9000_iow(DM9000_NCR, 3); + + do { + DM9000_DBG("resetting the DM9000, 1st reset\n"); + udelay(25); /* Wait at least 20 us */ + } while (DM9000_ior(DM9000_NCR) & 1); + + DM9000_iow(DM9000_NCR, 0); + DM9000_iow(DM9000_NCR, 3); /* Issue a second reset */ + + do { + DM9000_DBG("resetting the DM9000, 2nd reset\n"); + udelay(25); /* Wait at least 20 us */ + } while (DM9000_ior(DM9000_NCR) & 1); + + /* Check whether the ethernet controller is present */ + if ((DM9000_ior(DM9000_PIDL) != 0x0) || + (DM9000_ior(DM9000_PIDH) != 0x90)) + printf("ERROR: resetting DM9000 -> not responding\n"); } /* Initilize dm9000 board |