Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sh64/kernel/early_printk.c b/arch/sh64/kernel/early_printk.c
new file mode 100644
index 0000000..8c8a76e
--- /dev/null
+++ b/arch/sh64/kernel/early_printk.c
@@ -0,0 +1,105 @@
+/*
+ * arch/sh64/kernel/early_printk.c
+ *
+ * SH-5 Early SCIF console (cloned and hacked from sh implementation)
+ *
+ * Copyright (C) 2003, 2004 Paul Mundt <lethal@linux-sh.org>
+ * Copyright (C) 2002 M. R. Brown <mrbrown@0xd6.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/console.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+
+#define SCIF_BASE_ADDR 0x01030000
+#define SCIF_ADDR_SH5 PHYS_PERIPHERAL_BLOCK+SCIF_BASE_ADDR
+
+/*
+ * Fixed virtual address where SCIF is mapped (should already be done
+ * in arch/sh64/kernel/head.S!).
+ */
+#define SCIF_REG 0xfa030000
+
+enum {
+ SCIF_SCSMR2 = SCIF_REG + 0x00,
+ SCIF_SCBRR2 = SCIF_REG + 0x04,
+ SCIF_SCSCR2 = SCIF_REG + 0x08,
+ SCIF_SCFTDR2 = SCIF_REG + 0x0c,
+ SCIF_SCFSR2 = SCIF_REG + 0x10,
+ SCIF_SCFRDR2 = SCIF_REG + 0x14,
+ SCIF_SCFCR2 = SCIF_REG + 0x18,
+ SCIF_SCFDR2 = SCIF_REG + 0x1c,
+ SCIF_SCSPTR2 = SCIF_REG + 0x20,
+ SCIF_SCLSR2 = SCIF_REG + 0x24,
+};
+
+static void sh_console_putc(int c)
+{
+ while (!(ctrl_inw(SCIF_SCFSR2) & 0x20))
+ cpu_relax();
+
+ ctrl_outb(c, SCIF_SCFTDR2);
+ ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0x9f), SCIF_SCFSR2);
+
+ if (c == '\n')
+ sh_console_putc('\r');
+}
+
+static void sh_console_flush(void)
+{
+ ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0xbf), SCIF_SCFSR2);
+
+ while (!(ctrl_inw(SCIF_SCFSR2) & 0x40))
+ cpu_relax();
+
+ ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0xbf), SCIF_SCFSR2);
+}
+
+static void sh_console_write(struct console *con, const char *s, unsigned count)
+{
+ while (count-- > 0)
+ sh_console_putc(*s++);
+
+ sh_console_flush();
+}
+
+static int __init sh_console_setup(struct console *con, char *options)
+{
+ con->cflag = CREAD | HUPCL | CLOCAL | B19200 | CS8;
+
+ return 0;
+}
+
+static struct console sh_console = {
+ .name = "scifcon",
+ .write = sh_console_write,
+ .setup = sh_console_setup,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+void __init enable_early_printk(void)
+{
+ ctrl_outb(0x2a, SCIF_SCBRR2); /* 19200bps */
+
+ ctrl_outw(0x04, SCIF_SCFCR2); /* Reset TFRST */
+ ctrl_outw(0x10, SCIF_SCFCR2); /* TTRG0=1 */
+
+ ctrl_outw(0, SCIF_SCSPTR2);
+ ctrl_outw(0x60, SCIF_SCFSR2);
+ ctrl_outw(0, SCIF_SCLSR2);
+ ctrl_outw(0x30, SCIF_SCSCR2);
+
+ register_console(&sh_console);
+}
+
+void disable_early_printk(void)
+{
+ unregister_console(&sh_console);
+}
+