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authorAlexandre Bounine <alexandre.bounine@idt.com>2010-10-27 15:34:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-27 18:03:16 -0700
commitaf84ca38aff94061dd0711edbb99b0900a9c28fd (patch)
tree31f51e9106c0a0944ec168dc25399f12ab2fa527 /arch
parenta3725c45c114bd06e091802f90533332d1e93819 (diff)
rapidio: add handling of redundant routes
Detects RIO link to the already enumerated device and properly sets links between device objects. Changes to the enumeration/discovery logic: 1. Use Master Enable bit to signal end of the enumeration - agents may start their discovery process as soon as they see this bit set (Component Tag register was used before for this purpose). 2. Enumerator sets Component Tag (!= 0) immediately during device setup. This allows to identify the device if the redundant route exists in a RIO system. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Thomas Moll <thomas.moll@sysgo.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> 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>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/sysdev/fsl_rio.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index ed2ec7154917..9725369d432a 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -50,6 +50,7 @@
#define RIO_ATMU_REGS_OFFSET 0x10c00
#define RIO_P_MSG_REGS_OFFSET 0x11000
#define RIO_S_MSG_REGS_OFFSET 0x13000
+#define RIO_GCCSR 0x13c
#define RIO_ESCSR 0x158
#define RIO_CCSR 0x15c
#define RIO_LTLEDCSR 0x0608
@@ -1471,6 +1472,7 @@ int fsl_rio_setup(struct platform_device *dev)
port->host_deviceid = fsl_rio_get_hdid(port->id);
port->priv = priv;
+ port->phys_efptr = 0x100;
rio_register_mport(port);
priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
@@ -1518,6 +1520,12 @@ int fsl_rio_setup(struct platform_device *dev)
dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
port->sys_size ? 65536 : 256);
+ if (port->host_deviceid >= 0)
+ out_be32(priv->regs_win + RIO_GCCSR, RIO_PORT_GEN_HOST |
+ RIO_PORT_GEN_MASTER | RIO_PORT_GEN_DISCOVERED);
+ else
+ out_be32(priv->regs_win + RIO_GCCSR, 0x00000000);
+
priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
+ RIO_ATMU_REGS_OFFSET);
priv->maint_atmu_regs = priv->atmu_regs + 1;