mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
90 lines
2.3 KiB
Diff
90 lines
2.3 KiB
Diff
From c615e4c64389ef138c6a13afa744e09134db2c82 Mon Sep 17 00:00:00 2001
|
|
From: Lars-Peter Clausen <lars@metafoo.de>
|
|
Date: Sat, 19 Jun 2010 04:08:17 +0000
|
|
Subject: [PATCH] MIPS: JZ4740: Add prom support
|
|
|
|
Add support for initializing arcs_cmdline on JZ4740 based machines and
|
|
provides a prom_putchar implementation.
|
|
|
|
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
|
|
Cc: linux-mips@linux-mips.org
|
|
Cc: linux-kernel@vger.kernel.org
|
|
Patchwork: https://patchwork.linux-mips.org/patch/1404/
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
---
|
|
arch/mips/jz4740/prom.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++
|
|
1 files changed, 68 insertions(+), 0 deletions(-)
|
|
create mode 100644 arch/mips/jz4740/prom.c
|
|
|
|
--- /dev/null
|
|
+++ b/arch/mips/jz4740/prom.c
|
|
@@ -0,0 +1,68 @@
|
|
+/*
|
|
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
|
|
+ * JZ4740 SoC prom code
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License along
|
|
+ * with this program; if not, write to the Free Software Foundation, Inc.,
|
|
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/string.h>
|
|
+
|
|
+#include <linux/serial_reg.h>
|
|
+
|
|
+#include <asm/bootinfo.h>
|
|
+#include <asm/mach-jz4740/base.h>
|
|
+
|
|
+void jz4740_init_cmdline(int argc, char *argv[])
|
|
+{
|
|
+ unsigned int count = COMMAND_LINE_SIZE - 1;
|
|
+ int i;
|
|
+ char *dst = &(arcs_cmdline[0]);
|
|
+ char *src;
|
|
+
|
|
+ for (i = 1; i < argc && count; ++i) {
|
|
+ src = argv[i];
|
|
+ while (*src && count) {
|
|
+ *dst++ = *src++;
|
|
+ --count;
|
|
+ }
|
|
+ *dst++ = ' ';
|
|
+ }
|
|
+ if (i > 1)
|
|
+ --dst;
|
|
+
|
|
+ *dst = 0;
|
|
+}
|
|
+
|
|
+void __init prom_init(void)
|
|
+{
|
|
+ jz4740_init_cmdline((int)fw_arg0, (char **)fw_arg1);
|
|
+ mips_machtype = MACH_INGENIC_JZ4740;
|
|
+}
|
|
+
|
|
+void __init prom_free_prom_memory(void)
|
|
+{
|
|
+}
|
|
+
|
|
+#define UART_REG(_reg) ((void __iomem *)CKSEG1ADDR(JZ4740_UART0_BASE_ADDR + (_reg << 2)))
|
|
+
|
|
+void prom_putchar(char c)
|
|
+{
|
|
+ uint8_t lsr;
|
|
+
|
|
+ do {
|
|
+ lsr = readb(UART_REG(UART_LSR));
|
|
+ } while ((lsr & UART_LSR_TEMT) == 0);
|
|
+
|
|
+ writeb(c, UART_REG(UART_TX));
|
|
+}
|