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ieee1394: support for speeds greater than S800 

The hard-wired configuration of the top speed (until now S800) was
unnecessary, remove it.

If the local link layer controller supports S1600 or S3200, we now
assume this speed for all present 1394b PHYs (except if they are
behind 1394a repeaters) until nodemgr figured out the actual speed
while fetching the config ROM.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2009-01-19 19:19:55 +01:00
parent e747a5c0be
commit 82d4b90deb
2 changed files with 9 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/ieee1394/ieee1394.h
View File

@ -54,9 +54,7 @@
#define IEEE1394_SPEED_800 0x03
#define IEEE1394_SPEED_1600 0x04
#define IEEE1394_SPEED_3200 0x05
/* The current highest tested speed supported by the subsystem */
#define IEEE1394_SPEED_MAX IEEE1394_SPEED_800
#define IEEE1394_SPEED_MAX IEEE1394_SPEED_3200
/* Maps speed values above to a string representation */
extern const char *hpsb_speedto_str[];

16
drivers/ieee1394/ieee1394_core.c
View File

@ -338,6 +338,7 @@ static void build_speed_map(struct hpsb_host *host, int nodecount)
u8 cldcnt[nodecount];
u8 *map = host->speed_map;
u8 *speedcap = host->speed;
u8 local_link_speed = host->csr.lnk_spd;
struct selfid *sid;
struct ext_selfid *esid;
int i, j, n;
@ -373,8 +374,8 @@ static void build_speed_map(struct hpsb_host *host, int nodecount)
if (sid->port2 == SELFID_PORT_CHILD) cldcnt[n]++;
speedcap[n] = sid->speed;
if (speedcap[n] > host->csr.lnk_spd)
speedcap[n] = host->csr.lnk_spd;
if (speedcap[n] > local_link_speed)
speedcap[n] = local_link_speed;
n--;
}
}
@ -407,12 +408,11 @@ static void build_speed_map(struct hpsb_host *host, int nodecount)
}
}
#if SELFID_SPEED_UNKNOWN != IEEE1394_SPEED_MAX
/* assume maximum speed for 1394b PHYs, nodemgr will correct it */
for (n = 0; n < nodecount; n++)
if (speedcap[n] == SELFID_SPEED_UNKNOWN)
speedcap[n] = IEEE1394_SPEED_MAX;
#endif
/* assume a maximum speed for 1394b PHYs, nodemgr will correct it */
if (local_link_speed > SELFID_SPEED_UNKNOWN)
for (i = 0; i < nodecount; i++)
if (speedcap[i] == SELFID_SPEED_UNKNOWN)
speedcap[i] = local_link_speed;
}