Signed-off-by: Matthieu Castet <matthieu.cas...@parrot.com>
---
drivers/tty/hvc/hvc_dcc.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c
index 44fbeba..489e9e5 100644
--- a/drivers/tty/hvc/hvc_dcc.c
+++ b/drivers/tty/hvc/hvc_dcc.c
@@ -26,6 +26,7 @@
#include "hvc_console.h"
+#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V7)
/* DCC Status Bits */
#define DCC_STATUS_RX (1 << 30)
#define DCC_STATUS_TX (1 << 29)
@@ -58,6 +59,39 @@ static inline void __dcc_putchar(char c)
: "r" (c));
isb();
}
+#else
+/* DCC Status Bits */
+#define DCC_STATUS_RX (1 << 0)
+#define DCC_STATUS_TX (1 << 1)
+
+/* primitive JTAG1 protocol utilities */
+static inline u32 __dcc_getstatus(void)
+{
+ u32 ret;
+
+ asm __volatile__ ("mrc p14, 0, %0, c0, c0 @ read comms ctrl reg"
+ : "=r" (ret));
+
+ return ret;
+}
+
+static inline char __dcc_getchar(void)
+{
+ char c;
+
+ asm __volatile__ ("mrc p14, 0, %0, c1, c0 @ read comms data reg"
+ : "=r" (c));
+
+ return c;
+}
+
+static inline void __dcc_putchar(unsigned char c)
+{
+ asm __volatile__ ("mcr p14, 0, %0, c1, c0 @ write a char"
+ : /* no output register */
+ : "r" (c));
+}
+#endif
static int hvc_dcc_put_chars(uint32_t vt, const char *buf, int count)
{
--
1.7.10.4
--
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