X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fblackfin%2Fcpu%2Fjtag-console.c;h=7cddb85a7f3cf779dffeba4811218a48e7e45648;hb=8b493a52367623f36e628e4ab2cf8ee082b655e0;hp=1cd619f10b02d016cab184a1d63d00feccff53ea;hpb=c6fb83d21729321426308c3acff2a3dfb20d250b;p=u-boot

diff --git a/arch/blackfin/cpu/jtag-console.c b/arch/blackfin/cpu/jtag-console.c
index 1cd619f10b..7cddb85a7f 100644
--- a/arch/blackfin/cpu/jtag-console.c
+++ b/arch/blackfin/cpu/jtag-console.c
@@ -1,49 +1,116 @@
 /*
  * jtag-console.c - console driver over Blackfin JTAG
  *
- * Copyright (c) 2008 Analog Devices Inc.
+ * Copyright (c) 2008-2010 Analog Devices Inc.
  *
  * Licensed under the GPL-2 or later.
  */
 
 #include <common.h>
+#include <malloc.h>
 #include <stdio_dev.h>
 #include <asm/blackfin.h>
 
+#ifdef DEBUG
+# define dprintf(...) serial_printf(__VA_ARGS__)
+#else
+# define dprintf(...) do { if (0) printf(__VA_ARGS__); } while (0)
+#endif
+
+static inline void dprintf_decode(const char *s, uint32_t len)
+{
+	uint32_t i;
+	for (i = 0; i < len; ++i)
+		if (s[i] < 0x20 || s[i] >= 0x7f)
+			dprintf("\\%o", s[i]);
+		else
+			dprintf("%c", s[i]);
+}
+
+static inline uint32_t bfin_write_emudat(uint32_t emudat)
+{
+	__asm__ __volatile__("emudat = %0;" : : "d"(emudat));
+	return emudat;
+}
+
+static inline uint32_t bfin_read_emudat(void)
+{
+	uint32_t emudat;
+	__asm__ __volatile__("%0 = emudat;" : "=d"(emudat));
+	return emudat;
+}
+
 #ifndef CONFIG_JTAG_CONSOLE_TIMEOUT
 # define CONFIG_JTAG_CONSOLE_TIMEOUT 500
 #endif
 
 /* The Blackfin tends to be much much faster than the JTAG hardware. */
-static void jtag_write_emudat(uint32_t emudat)
+static bool jtag_write_emudat(uint32_t emudat)
 {
 	static bool overflowed = false;
-	ulong timeout = get_timer(0) + CONFIG_JTAG_CONSOLE_TIMEOUT;
+	ulong timeout = get_timer(0);
 	while (bfin_read_DBGSTAT() & 0x1) {
 		if (overflowed)
-			return;
-		if (timeout < get_timer(0))
+			return overflowed;
+		if (get_timer(timeout) > CONFIG_JTAG_CONSOLE_TIMEOUT)
 			overflowed = true;
 	}
 	overflowed = false;
-	__asm__ __volatile__("emudat = %0;" : : "d"(emudat));
+	bfin_write_emudat(emudat);
+	return overflowed;
 }
 /* Transmit a buffer.  The format is:
  * [32bit length][actual data]
  */
-static void jtag_send(const char *c, uint32_t len)
+static void jtag_send(const char *raw_str, uint32_t len)
 {
-	uint32_t i;
+	const char *cooked_str;
+	uint32_t i, ex;
 
 	if (len == 0)
 		return;
 
+	/* Ugh, need to output \r after \n */
+	ex = 0;
+	for (i = 0; i < len; ++i)
+		if (raw_str[i] == '\n')
+			++ex;
+	if (ex) {
+		char *c = malloc(len + ex);
+		cooked_str = c;
+		for (i = 0; i < len; ++i) {
+			*c++ = raw_str[i];
+			if (raw_str[i] == '\n')
+				*c++ = '\r';
+		}
+		len += ex;
+	} else
+		cooked_str = raw_str;
+
+	dprintf("%s(\"", __func__);
+	dprintf_decode(cooked_str, len);
+	dprintf("\", %i)\n", len);
+
 	/* First send the length */
-	jtag_write_emudat(len);
+	if (jtag_write_emudat(len))
+		goto done;
 
 	/* Then send the data */
-	for (i = 0; i < len; i += 4)
-		jtag_write_emudat((c[i] << 0) | (c[i+1] << 8) | (c[i+2] << 16) | (c[i+3] << 24));
+	for (i = 0; i < len; i += 4) {
+		uint32_t emudat =
+			(cooked_str[i + 0] <<  0) |
+			(cooked_str[i + 1] <<  8) |
+			(cooked_str[i + 2] << 16) |
+			(cooked_str[i + 3] << 24);
+		if (jtag_write_emudat(emudat)) {
+			bfin_write_emudat(0);
+			goto done;
+		}
+	}
+
+ done:
+	if (cooked_str != raw_str)
+		free((char *)cooked_str);
 }
 static void jtag_putc(const char c)
 {
@@ -59,7 +126,10 @@ static size_t inbound_len, leftovers_len;
 /* Lower layers want to know when jtag has data */
 static int jtag_tstc_dbg(void)
 {
-	return (bfin_read_DBGSTAT() & 0x2);
+	int ret = (bfin_read_DBGSTAT() & 0x2);
+	if (ret)
+		dprintf("%s: ret:%i\n", __func__, ret);
+	return ret;
 }
 
 /* Higher layers want to know when any data is available */
@@ -77,6 +147,9 @@ static int jtag_getc(void)
 	int ret;
 	uint32_t emudat;
 
+	dprintf("%s: inlen:%zu leftlen:%zu left:%x\n", __func__,
+		inbound_len, leftovers_len, leftovers);
+
 	/* see if any data is left over */
 	if (leftovers_len) {
 		--leftovers_len;
@@ -88,7 +161,7 @@ static int jtag_getc(void)
 	/* wait for new data ! */
 	while (!jtag_tstc_dbg())
 		continue;
-	__asm__("%0 = emudat;" : "=d"(emudat));
+	emudat = bfin_read_emudat();
 
 	if (inbound_len == 0) {
 		/* grab the length */
@@ -121,12 +194,35 @@ int drv_jtag_console_init(void)
 }
 
 #ifdef CONFIG_UART_CONSOLE_IS_JTAG
+#include <serial.h>
 /* Since the JTAG is always available (at power on), allow it to fake a UART */
-void serial_set_baud(uint32_t baud) {}
-void serial_setbrg(void)            {}
-int serial_init(void)               { return 0; }
-void serial_putc(const char c)      __attribute__((alias("jtag_putc")));
-void serial_puts(const char *s)     __attribute__((alias("jtag_puts")));
-int serial_tstc(void)               __attribute__((alias("jtag_tstc")));
-int serial_getc(void)               __attribute__((alias("jtag_getc")));
+void jtag_serial_setbrg(void)
+{
+}
+
+int jtag_serial_init(void)
+{
+	return 0;
+}
+
+static struct serial_device serial_jtag_drv = {
+	.name	= "jtag",
+	.start	= jtag_serial_init,
+	.stop	= NULL,
+	.setbrg	= jtag_serial_setbrg,
+	.putc	= jtag_putc,
+	.puts	= jtag_puts,
+	.tstc	= jtag_tstc,
+	.getc	= jtag_getc,
+};
+
+void bfin_jtag_initialize(void)
+{
+	serial_register(&serial_jtag_drv);
+}
+
+struct serial_device *default_serial_console(void)
+{
+	return &serial_jtag_drv;
+}
 #endif