b43: Add firmware markers support
This adds support for firmware markers.
With firmware markers it's easily possible to check whether the
firmware runs some codepath or not. The driver will throw a message
when the firmware executes a MARKER(x).
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index f004175..e919189 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -428,8 +428,13 @@
#define B43_DEBUGIRQ_PANIC 0 /* The firmware panic'ed */
#define B43_DEBUGIRQ_DUMP_SHM 1 /* Dump shared SHM */
#define B43_DEBUGIRQ_DUMP_REGS 2 /* Dump the microcode registers */
+#define B43_DEBUGIRQ_MARKER 3 /* A "marker" was thrown by the firmware. */
#define B43_DEBUGIRQ_ACK 0xFFFF /* The host writes that to ACK the IRQ */
+/* The firmware register that contains the "marker" line. */
+#define B43_MARKER_ID_REG 2
+#define B43_MARKER_LINE_REG 3
+
/* The firmware register to fetch the panic reason from. */
#define B43_FWPANIC_REASON_REG 3
/* Firmware panic reason codes */
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index e1dfb40..cbb317b 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -1689,7 +1689,7 @@
static void handle_irq_ucode_debug(struct b43_wldev *dev)
{
unsigned int i, cnt;
- u16 reason;
+ u16 reason, marker_id, marker_line;
__le16 *buf;
/* The proprietary firmware doesn't have this IRQ. */
@@ -1737,6 +1737,17 @@
}
printk("\n");
break;
+ case B43_DEBUGIRQ_MARKER:
+ if (!B43_DEBUG)
+ break; /* Only with driver debugging enabled. */
+ marker_id = b43_shm_read16(dev, B43_SHM_SCRATCH,
+ B43_MARKER_ID_REG);
+ marker_line = b43_shm_read16(dev, B43_SHM_SCRATCH,
+ B43_MARKER_LINE_REG);
+ b43info(dev->wl, "The firmware just executed the MARKER(%u) "
+ "at line number %u\n",
+ marker_id, marker_line);
+ break;
default:
b43dbg(dev->wl, "Debug-IRQ triggered for unknown reason: %u\n",
reason);