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re(4) devices requires an external EEPROM. Depending on models it

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would be 93C46(1Kbit) or 93C56(2Kbit). One of differences between them
is number of address lines required to access the EEPROM. For example,
93C56 EEPROM needs 8 address lines to read/write data. If 93C56
recevied premature end of required number of serial clock(CLK) to set
OP code/address of EEPROM, the result would be unexpected behavior.
Previously it tried to detect 93C46, which requires 6 address lines,
and then assumed it would be 93C56 if read data was not expected
value. However, this approach didn't work in some models/situations
as 93C56 requries 8 address lines to access its data. In order to fix
it, change EEPROM probing order such that 93C56 is detected reliably.

While I'm here change hard-coded address line numbers with defined
constant to enhance readability.

PR:	112710
Approved by:	re (mux)
This commit is contained in:
Pyun YongHyeon 2007-07-06 00:05:12 +00:00
parent 7ea2134cb2
commit 141f92e7b5
2 changed files with 4 additions and 2 deletions
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4
sys/dev/re/if_re.c
View File

@ -1211,10 +1211,10 @@ re_attach(dev)
hw_rev++;
}
sc->rl_eewidth = 6;
sc->rl_eewidth = RL_9356_ADDR_LEN;
re_read_eeprom(sc, (caddr_t)&re_did, 0, 1);
if (re_did != 0x8129)
sc->rl_eewidth = 8;
sc->rl_eewidth = RL_9346_ADDR_LEN;
/*
* Get station address from the EEPROM.

2
sys/pci/if_rlreg.h
View File

@ -312,6 +312,8 @@
#define RL_EEMODE_WRITECFG (0x80|0x40)
/* 9346 EEPROM commands */
#define RL_9346_ADDR_LEN 6 /* 93C46 1K: 128x16 */
#define RL_9356_ADDR_LEN 8 /* 93C56 2K: 256x16 */
#define RL_9346_WRITE 0x5
#define RL_9346_READ 0x6