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Date: Mon, 29 Jun 2015 17:54:58 +0200
From: Gwenn Bourrée <gwenn.bourree@...el.com>
To: gregkh@...uxfoundation.org, jslaby@...e.cz
Cc: linux-api@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH]: MUX n_gsm debug print improvements
Dear kernel tty maintainers,
Please review the following patch:
From 0ac5da0a4653f43ce4b0761a2be8073185c549bb Mon Sep 17 00:00:00 2001
From: Gwenn Bourree <gwenn.bourree@...el.com>
Date: Mon, 29 Jun 2015 16:09:06 +0200
Subject: [PATCH] Add Debug define
Improve the debug print out and make be clearest
Signed-off-by: Gwenn Bourree <gwenn.bourree@...el.com>
Signed-off-by: Mustapha Ben Zoubeir <mustaphax.ben.zoubeir@...el.com>
Signed-off-by: Nicolas LOUIS <nicolasx.louis@...el.com>
Reviewed-by: Ravindran, Arun <arun.ravindran@...el.com
---
drivers/tty/n_gsm.c | 49
++++++++++++++++++++++++++++---------------------
1 file changed, 28 insertions(+), 21 deletions(-)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 382d3fc..d6e0ea0 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -66,17 +66,18 @@
static int debug;
module_param(debug, int, 0600);
-/* Defaults: these are from the specification */
+#define GSMDBG_VERBOSE_PACKET_REPORT(x) ((x) & 1)
+#define GSMDBG_FORCE_CARRIER(x) ((x) & 2)
+#define GSMDBG_DATA_FULL_REPORT(x) ((x) & 4)
+#define GSMDBG_DLCI_STREAM_REPORT(x) ((x) & 8)
+#define GSMDBG_DLCI_DATA_REPORT(x) ((x) & 16)
+#define GSMDBG_DATA_LEN_REPORT(x) ((x) & 32)
-#define T1 10 /* 100mS */
-#define T2 34 /* 333mS */
-#define N2 3 /* Retry 3 times */
+/* Defaults: these are from the specification */
-/* Use long timers for testing at low speed with debug on */
-#ifdef DEBUG_TIMING
-#define T1 100
-#define T2 200
-#endif
+#define T1 10 /* 100mS */
+#define T2 34 /* 333mS */
+#define N2 3 /* Retry 3 times */
/*
* Semi-arbitrary buffer size limits. 0710 is normally run with 32-64
byte
@@ -461,7 +462,7 @@ static u8 gsm_encode_modem(const struct gsm_dlci
*dlci)
static void gsm_print_packet(const char *hdr, int addr, int cr,
u8 control, const u8 *data, int dlen)
{
- if (!(debug & 1))
+ if (!GSMDBG_VERBOSE_PACKET_REPORT(debug))
return;
pr_info("%s %d) %c: ", hdr, addr, "RC"[cr]);
@@ -700,7 +701,7 @@ static void gsm_data_kick(struct gsm_mux *gsm)
len = msg->len + 2;
}
- if (debug & 4)
+ if (GSMDBG_DATA_FULL_REPORT(debug))
print_hex_dump_bytes("gsm_data_kick: ",
DUMP_PREFIX_OFFSET,
gsm->txframe, len);
@@ -1426,7 +1427,7 @@ static int gsm_control_wait(struct gsm_mux *gsm,
struct gsm_control *control)
static void gsm_dlci_close(struct gsm_dlci *dlci)
{
del_timer(&dlci->t1);
- if (debug & 8)
+ if (GSMDBG_DLCI_STREAM_REPORT(debug))
pr_debug("DLCI %d goes closed.\n", dlci->addr);
dlci->state = DLCI_CLOSED;
if (dlci->addr != 0) {
@@ -1453,7 +1454,7 @@ static void gsm_dlci_open(struct gsm_dlci *dlci)
del_timer(&dlci->t1);
/* This will let a tty open continue */
dlci->state = DLCI_OPEN;
- if (debug & 8)
+ if (GSMDBG_DLCI_STREAM_REPORT(debug))
pr_debug("DLCI %d goes open.\n", dlci->addr);
wake_up(&dlci->gsm->event);
}
@@ -1556,8 +1557,8 @@ static void gsm_dlci_data(struct gsm_dlci *dlci,
u8 *data, int clen)
unsigned int modem = 0;
int len = clen;
- if (debug & 16)
- pr_debug("%d bytes for tty\n", len);
+ if (GSMDBG_DLCI_DATA_REPORT(debug))
+ pr_debug("%s: %d bytes for tty\n", __func__, len);
switch (dlci->adaption) {
/* Unsupported types */
/* Packetised interruptible data */
@@ -1758,7 +1759,7 @@ static void gsm_queue(struct gsm_mux *gsm)
}
if (gsm->fcs != GOOD_FCS) {
gsm->bad_fcs++;
- if (debug & 4)
+ if (GSMDBG_DATA_FULL_REPORT(debug))
pr_debug("BAD FCS %02x\n", gsm->fcs);
return;
}
@@ -1922,6 +1923,7 @@ static void gsm0_receive(struct gsm_mux *gsm,
unsigned char c)
gsm->state = GSM_SEARCH;
break;
}
+ pr_debug("wait for GSM0_SOF, while got 0x%x\n", (u32)c);
break;
}
}
@@ -2209,9 +2211,12 @@ static int gsmld_output(struct gsm_mux *gsm, u8
*data, int len)
set_bit(TTY_DO_WRITE_WAKEUP, &gsm->tty->flags);
return -ENOSPC;
}
- if (debug & 4)
- print_hex_dump_bytes("gsmld_output: ", DUMP_PREFIX_OFFSET,
+ if (GSMDBG_DATA_FULL_REPORT(debug))
+ print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
data, len);
+ else if (GSMDBG_DATA_LEN_REPORT(debug))
+ pr_debug("n_gsm: >> %d bytes\n", len);
+
gsm->tty->ops->write(gsm->tty, data, len);
return len;
}
@@ -2276,9 +2281,11 @@ static void gsmld_receive_buf(struct tty_struct
*tty, const unsigned char *cp,
int i;
char flags = TTY_NORMAL;
- if (debug & 4)
- print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET,
+ if (GSMDBG_DATA_FULL_REPORT(debug))
+ print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
cp, count);
+ else if (GSMDBG_DATA_LEN_REPORT(debug))
+ pr_debug("n_gsm: << %d bytes\n", count);
for (i = count, dp = cp, f = fp; i; i--, dp++) {
if (f)
@@ -2871,7 +2878,7 @@ static int gsm_carrier_raised(struct tty_port
*port)
/* Not yet open so no carrier info */
if (dlci->state != DLCI_OPEN)
return 0;
- if (debug & 2)
+ if (GSMDBG_FORCE_CARRIER(debug))
return 1;
return dlci->modem_rx & TIOCM_CD;
}
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