diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.35/013-prom.patch')
| -rw-r--r-- | target/linux/xburst/patches-2.6.35/013-prom.patch | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.35/013-prom.patch b/target/linux/xburst/patches-2.6.35/013-prom.patch new file mode 100644 index 0000000000..937a9356fd --- /dev/null +++ b/target/linux/xburst/patches-2.6.35/013-prom.patch @@ -0,0 +1,89 @@ +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)); ++} |