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authorEmil Medve <Emilian.Medve@freescale.com>2010-08-31 22:57:36 -0500
committerKumar Gala <galak@kernel.crashing.org>2011-04-27 22:29:04 -0500
commit3d28c5c8ed84c47314fcc447c86964e7c898a1d5 (patch)
tree5369a0d43f54c9454692e8d5355d5f4e8dcb8066 /arch/powerpc/cpu
parent02bb49891eb68739b38fa7d0b1480a00e81558d0 (diff)
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powerpc/85xx: fsl_corenet_serdes code rework
Rework and add some new APIs to the fsl_corenet_serdes code for use by erratum and drivers. * Rename serdes_get_bank() to serdes_get_bank_by_lane() * Add serdes_get_first_lane returns which SERDES lane is used by device Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu')
-rw-r--r--arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c40
-rw-r--r--arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.h2
2 files changed, 39 insertions, 3 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
index f58d6d6..1177247 100644
--- a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
+++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
@@ -29,6 +29,7 @@
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/fsl_law.h>
+#include <asm/errno.h>
#include "fsl_corenet_serdes.h"
static u32 serdes_prtcl_map;
@@ -91,7 +92,7 @@ int serdes_get_lane_idx(int lane)
return lanes[lane].idx;
}
-int serdes_get_bank(int lane)
+int serdes_get_bank_by_lane(int lane)
{
return lanes[lane].bank;
}
@@ -132,6 +133,41 @@ int is_serdes_configured(enum srds_prtcl device)
return (1 << device) & serdes_prtcl_map;
}
+static int __serdes_get_first_lane(uint32_t prtcl, enum srds_prtcl device)
+{
+ int i;
+
+ for (i = 0; i < SRDS_MAX_LANES; i++) {
+ if (serdes_get_prtcl(prtcl, i) == device)
+ return i;
+ }
+
+ return -ENODEV;
+}
+
+/*
+ * Returns the SERDES lane (0..SRDS_MAX_LANES-1) that routes to the given
+ * device. This depends on the current SERDES protocol, as defined in the RCW.
+ *
+ * Returns a negative error code if SERDES is disabled or the given device is
+ * not supported in the current SERDES protocol.
+ */
+int serdes_get_first_lane(enum srds_prtcl device)
+{
+ u32 prtcl;
+ const ccsr_gur_t *gur;
+
+ gur = (typeof(gur))CONFIG_SYS_MPC85xx_GUTS_ADDR;
+
+ /* Is serdes enabled at all? */
+ if (unlikely((in_be32(&gur->rcwsr[5]) & 0x2000) == 0))
+ return -ENODEV;
+
+ prtcl = (in_be32(&gur->rcwsr[4]) & FSL_CORENET_RCWSR4_SRDS_PRTCL) >> 26;
+
+ return __serdes_get_first_lane(prtcl, device);
+}
+
#ifndef CONFIG_SYS_DCSRBAR_PHYS
#define CONFIG_SYS_DCSRBAR_PHYS 0x80000000 /* Must be 1GB-aligned for rev1.0 */
#define CONFIG_SYS_DCSRBAR 0x80000000
@@ -325,7 +361,7 @@ void fsl_serdes_init(void)
for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
enum srds_prtcl lane_prtcl = serdes_get_prtcl(cfg, lane);
if (serdes_lane_enabled(lane)) {
- have_bank[serdes_get_bank(lane)] = 1;
+ have_bank[serdes_get_bank_by_lane(lane)] = 1;
serdes_prtcl_map |= (1 << lane_prtcl);
}
}
diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.h b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.h
index 42d771e..f261351 100644
--- a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.h
+++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.h
@@ -33,7 +33,7 @@ enum srds_bank {
int is_serdes_prtcl_valid(u32 prtcl);
int serdes_get_lane_idx(int lane);
-int serdes_get_bank(int lane);
+int serdes_get_bank_by_lane(int lane);
int serdes_lane_enabled(int lane);
enum srds_prtcl serdes_get_prtcl(int cfg, int lane);