[PATCH 01/18] Virtex: Add uartlite bootwrapper driver

[Grant Likely]

From: Grant Likely <[EMAIL PROTECTED]>

Signed-off-by: Grant Likely <[EMAIL PROTECTED]>
---

 arch/powerpc/boot/Makefile   |    2 +
 arch/powerpc/boot/ops.h      |    1 +
 arch/powerpc/boot/serial.c   |    2 +
 arch/powerpc/boot/uartlite.c |   64 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 68 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index ca469e5..ac488ab 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -51,7 +51,7 @@ src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c 
flatdevtree_misc.c \
                ns16550.c serial.c simple_alloc.c div64.S util.S \
                gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
                4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
-               cpm-serial.c stdlib.c
+               cpm-serial.c stdlib.c uartlite.c
 src-plat := of.c cuboot-83xx.c cuboot-85xx.c holly.c \
                cuboot-ebony.c treeboot-ebony.c prpmc2800.c \
                ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-8xx.c \
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index 703255b..4ef30e4 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -84,6 +84,7 @@ int serial_console_init(void);
 int ns16550_console_init(void *devp, struct serial_console_data *scdp);
 int mpsc_console_init(void *devp, struct serial_console_data *scdp);
 int cpm_console_init(void *devp, struct serial_console_data *scdp);
+int uartlite_console_init(void *devp, struct serial_console_data *scdp);
 void *simple_alloc_init(char *base, unsigned long heap_size,
                        unsigned long granularity, unsigned long max_allocs);
 extern void flush_cache(void *, unsigned long);
diff --git a/arch/powerpc/boot/serial.c b/arch/powerpc/boot/serial.c
index d47f8e0..70f36bf 100644
--- a/arch/powerpc/boot/serial.c
+++ b/arch/powerpc/boot/serial.c
@@ -126,6 +126,8 @@ int serial_console_init(void)
                 dt_is_compatible(devp, "fsl,cpm2-scc-uart") ||
                 dt_is_compatible(devp, "fsl,cpm2-smc-uart"))
                rc = cpm_console_init(devp, &serial_cd);
+       else if (dt_is_compatible(devp, "xilinx,uartlite"))
+               rc = uartlite_console_init(devp, &serial_cd);
 
        /* Add other serial console driver calls here */
 
diff --git a/arch/powerpc/boot/uartlite.c b/arch/powerpc/boot/uartlite.c
new file mode 100644
index 0000000..f4249a7
--- /dev/null
+++ b/arch/powerpc/boot/uartlite.c
@@ -0,0 +1,64 @@
+/*
+ * Xilinx UARTLITE bootloader driver
+ *
+ * Copyright (C) 2007 Secret Lab Technologies Ltd.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include "types.h"
+#include "string.h"
+#include "stdio.h"
+#include "io.h"
+#include "ops.h"
+
+static void * reg_base;
+
+static int uartlite_open(void)
+{
+       /* Clear the RX FIFO */
+       out_be32(reg_base + 0x0C, 0x2);
+       return 0;
+}
+
+static void uartlite_putc(unsigned char c)
+{
+       while ((in_be32(reg_base + 0x8) & 0x08) != 0); /* spin */
+       out_be32(reg_base + 0x4, c);
+}
+
+static unsigned char uartlite_getc(void)
+{
+       while ((in_be32(reg_base + 0x8) & 0x01) == 0); /* spin */
+       return in_be32(reg_base);
+}
+
+static u8 uartlite_tstc(void)
+{
+       return ((in_be32(reg_base + 0x8) & 0x01) != 0);
+}
+
+int uartlite_console_init(void *devp, struct serial_console_data *scdp)
+{
+       int n;
+       unsigned long reg_phys;
+
+       n = getprop(devp, "virtual-reg", &reg_base, sizeof(reg_base));
+       if (n != sizeof(reg_base)) {
+               if (!dt_xlate_reg(devp, 0, &reg_phys, NULL))
+                       return -1;
+
+               reg_base = (void *)reg_phys;
+       }
+
+       scdp->open = uartlite_open;
+       scdp->putc = uartlite_putc;
+       scdp->getc = uartlite_getc;
+       scdp->tstc = uartlite_tstc;
+       scdp->close = NULL;
+       return 0;
+}

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