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authorJoel Stanley <joel@jms.id.au>2019-11-08 08:19:44 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-11-08 13:28:20 +0300
commit913b73730e15eebbe7182834a3a923ca0c1255e8 (patch)
treee5fc1ee544f088846c8e1726114041dc0707f158 /drivers/fsi
parent606397d67f4184a40732537be72e7e8658c26717 (diff)
downloadlinux-913b73730e15eebbe7182834a3a923ca0c1255e8.tar.xz
fsi: aspeed: Add trace points
These trace points help with debugging the FSI master. They show the low level reads, writes and error states of the master. Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20191108051945.7109-11-joel@jms.id.au Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fsi')
-rw-r--r--drivers/fsi/fsi-master-aspeed.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index d1b83f035483..95e226ac78b9 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -77,6 +77,9 @@ static const u32 fsi_base = 0xa0000000;
#define XFER_HALFWORD (BIT(0))
#define XFER_BYTE (0)
+#define CREATE_TRACE_POINTS
+#include <trace/events/fsi_master_aspeed.h>
+
#define FSI_LINK_ENABLE_SETUP_TIME 10 /* in mS */
#define DEFAULT_DIVISOR 14
@@ -102,6 +105,8 @@ static int __opb_write(struct fsi_master_aspeed *aspeed, u32 addr,
status = readl(base + OPB0_STATUS);
+ trace_fsi_master_aspeed_opb_write(addr, val, transfer_size, status, reg);
+
/* Return error when poll timed out */
if (ret)
return ret;
@@ -149,6 +154,10 @@ static int __opb_read(struct fsi_master_aspeed *aspeed, uint32_t addr,
result = readl(base + OPB0_FSI_DATA_R);
+ trace_fsi_master_aspeed_opb_read(addr, transfer_size, result,
+ readl(base + OPB0_STATUS),
+ reg);
+
/* Return error when poll timed out */
if (ret)
return ret;
@@ -196,6 +205,19 @@ static int check_errors(struct fsi_master_aspeed *aspeed, int err)
{
int ret;
+ if (trace_fsi_master_aspeed_opb_error_enabled()) {
+ __be32 mresp0, mstap0, mesrb0;
+
+ opb_readl(aspeed, ctrl_base + FSI_MRESP0, &mresp0);
+ opb_readl(aspeed, ctrl_base + FSI_MSTAP0, &mstap0);
+ opb_readl(aspeed, ctrl_base + FSI_MESRB0, &mesrb0);
+
+ trace_fsi_master_aspeed_opb_error(
+ be32_to_cpu(mresp0),
+ be32_to_cpu(mstap0),
+ be32_to_cpu(mesrb0));
+ }
+
if (err == -EIO) {
/* Check MAEB (0x70) ? */