target/linux/lantiq/patches/0001-MIPS-lantiq-fix-early-printk.patch

   1 From 91f8d0c8fbb9ea70bf78a291e312157177be8ee3 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sat, 20 Aug 2011 18:55:13 +0200
   4 Subject: [PATCH 01/24] MIPS: lantiq: fix early printk
   5
   6 The code was using a 32bit write operation in the early_printk code. This
   7 resulted in 3 zero bytes also being written to the serial port. Change the
   8 memory access to 8bit.
   9
  10 Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
  11 Signed-off-by: John Crispin <blogic@openwrt.org>
  12 Cc: linux-mips@linux-mips.org
  13 ---
  14  .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h |    4 ++++
  15  arch/mips/lantiq/early_printk.c                    |   14 ++++++++------
  16  2 files changed, 12 insertions(+), 6 deletions(-)
  17
  18 --- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
  19 +++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
  20 @@ -34,6 +34,10 @@
  21  #define LTQ_ASC1_BASE_ADDR     0x1E100C00
  22  #define LTQ_ASC_SIZE           0x400
  23
  24 +/* during early_printk no ioremap is possible
  25 +   lets use KSEG1 instead  */
  26 +#define LTQ_EARLY_ASC          KSEG1ADDR(LTQ_ASC1_BASE_ADDR)
  27 +
  28  /* RCU - reset control unit */
  29  #define LTQ_RCU_BASE_ADDR      0x1F203000
  30  #define LTQ_RCU_SIZE           0x1000
  31 --- a/arch/mips/lantiq/early_printk.c
  32 +++ b/arch/mips/lantiq/early_printk.c
  33 @@ -12,11 +12,13 @@
  34  #include <lantiq.h>
  35  #include <lantiq_soc.h>
  36
  37 -/* no ioremap possible at this early stage, lets use KSEG1 instead  */
  38 -#define LTQ_ASC_BASE   KSEG1ADDR(LTQ_ASC1_BASE_ADDR)
  39  #define ASC_BUF                1024
  40 -#define LTQ_ASC_FSTAT  ((u32 *)(LTQ_ASC_BASE + 0x0048))
  41 -#define LTQ_ASC_TBUF   ((u32 *)(LTQ_ASC_BASE + 0x0020))
  42 +#define LTQ_ASC_FSTAT  ((u32 *)(LTQ_EARLY_ASC + 0x0048))
  43 +#ifdef __BIG_ENDIAN
  44 +#define LTQ_ASC_TBUF   ((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3))
  45 +#else
  46 +#define LTQ_ASC_TBUF   ((u32 *)(LTQ_EARLY_ASC + 0x0020))
  47 +#endif
  48  #define TXMASK         0x3F00
  49  #define TXOFFSET       8
  50
  51 @@ -27,7 +29,7 @@ void prom_putchar(char c)
  52         local_irq_save(flags);
  53         do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET);
  54         if (c == '\n')
  55 -               ltq_w32('\r', LTQ_ASC_TBUF);
  56 -       ltq_w32(c, LTQ_ASC_TBUF);
  57 +               ltq_w8('\r', LTQ_ASC_TBUF);
  58 +       ltq_w8(c, LTQ_ASC_TBUF);
  59         local_irq_restore(flags);
  60  }