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rapidio: fix destructive port EM initialization for Tsi568

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Replace possibly damaging broadcast writes into the per-port SP_MODE
registers with individual writes for each port.  This will preserve
individual port configurations in case if ports are configured
differently.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine 2010-10-27 15:34:36 -07:00 committed by Linus Torvalds
parent 2d4da0fc09
commit 1548bf316f
1 changed files with 10 additions and 5 deletions
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15
drivers/rapidio/switches/tsi568.c
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@ -29,7 +29,7 @@
#define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
#define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
#define TSI568_SP_MODE_BC 0x10004
#define TSI568_SP_MODE(n) (0x11004 + 0x100*n)
#define TSI568_SP_MODE_PW_DIS 0x08000000
static int
@ -117,14 +117,19 @@ tsi568_em_init(struct rio_dev *rdev)
u16 destid = rdev->rswitch->destid;
u8 hopcount = rdev->rswitch->hopcount;
u32 regval;
int portnum;
pr_debug("TSI568 %s [%d:%d]\n", __func__, destid, hopcount);
/* Make sure that Port-Writes are disabled (for all ports) */
rio_mport_read_config_32(mport, destid, hopcount,
TSI568_SP_MODE_BC, &regval);
rio_mport_write_config_32(mport, destid, hopcount,
TSI568_SP_MODE_BC, regval | TSI568_SP_MODE_PW_DIS);
for (portnum = 0;
portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
rio_mport_read_config_32(mport, destid, hopcount,
TSI568_SP_MODE(portnum), &regval);
rio_mport_write_config_32(mport, destid, hopcount,
TSI568_SP_MODE(portnum),
regval | TSI568_SP_MODE_PW_DIS);
}
return 0;
}