target/linux/brcm47xx/patches-3.18/030-02-MIPS-BCM47XX-Make-ssb-init-NVRAM-instead-of-bcm47xx-.patch

   1 From 21400f252a97755579b43a4dc95dd02cd7f0ca75 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
   3 Date: Wed, 3 Sep 2014 22:59:45 +0200
   4 Subject: [PATCH 155/158] MIPS: BCM47XX: Make ssb init NVRAM instead of bcm47xx
   5  polling it
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 This makes NVRAM code less bcm47xx/ssb specific allowing it to become a
  11 standalone driver in the future. A similar patch for bcma will follow
  12 when it's ready.
  13
  14 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  15 Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
  16 Cc: linux-mips@linux-mips.org
  17 Patchwork: https://patchwork.linux-mips.org/patch/7612/
  18 Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
  19 ---
  20  arch/mips/bcm47xx/nvram.c                          | 30 +++++++---------------
  21  arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h |  1 +
  22  drivers/ssb/driver_mipscore.c                      | 14 +++++++++-
  23  3 files changed, 23 insertions(+), 22 deletions(-)
  24
  25 --- a/arch/mips/bcm47xx/nvram.c
  26 +++ b/arch/mips/bcm47xx/nvram.c
  27 @@ -98,7 +98,14 @@ found:
  28         return 0;
  29  }
  30
  31 -static int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
  32 +/*
  33 + * On bcm47xx we need access to the NVRAM very early, so we can't use mtd
  34 + * subsystem to access flash. We can't even use platform device / driver to
  35 + * store memory offset.
  36 + * To handle this we provide following symbol. It's supposed to be called as
  37 + * soon as we get info about flash device, before any NVRAM entry is needed.
  38 + */
  39 +int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
  40  {
  41         void __iomem *iobase;
  42         int err;
  43 @@ -114,25 +121,6 @@ static int bcm47xx_nvram_init_from_mem(u
  44         return err;
  45  }
  46
  47 -#ifdef CONFIG_BCM47XX_SSB
  48 -static int nvram_init_ssb(void)
  49 -{
  50 -       struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore;
  51 -       u32 base;
  52 -       u32 lim;
  53 -
  54 -       if (mcore->pflash.present) {
  55 -               base = mcore->pflash.window;
  56 -               lim = mcore->pflash.window_size;
  57 -       } else {
  58 -               pr_err("Couldn't find supported flash memory\n");
  59 -               return -ENXIO;
  60 -       }
  61 -
  62 -       return bcm47xx_nvram_init_from_mem(base, lim);
  63 -}
  64 -#endif
  65 -
  66  #ifdef CONFIG_BCM47XX_BCMA
  67  static int nvram_init_bcma(void)
  68  {
  69 @@ -168,7 +156,7 @@ static int nvram_init(void)
  70         switch (bcm47xx_bus_type) {
  71  #ifdef CONFIG_BCM47XX_SSB
  72         case BCM47XX_BUS_TYPE_SSB:
  73 -               return nvram_init_ssb();
  74 +               break;
  75  #endif
  76  #ifdef CONFIG_BCM47XX_BCMA
  77         case BCM47XX_BUS_TYPE_BCMA:
  78 --- a/arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h
  79 +++ b/arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h
  80 @@ -32,6 +32,7 @@ struct nvram_header {
  81  #define NVRAM_MAX_VALUE_LEN 255
  82  #define NVRAM_MAX_PARAM_LEN 64
  83
  84 +int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
  85  extern int bcm47xx_nvram_getenv(char *name, char *val, size_t val_len);
  86
  87  static inline void bcm47xx_nvram_parse_macaddr(char *buf, u8 macaddr[6])
  88 --- a/drivers/ssb/driver_mipscore.c
  89 +++ b/drivers/ssb/driver_mipscore.c
  90 @@ -15,6 +15,9 @@
  91  #include <linux/serial_core.h>
  92  #include <linux/serial_reg.h>
  93  #include <linux/time.h>
  94 +#ifdef CONFIG_BCM47XX
  95 +#include <bcm47xx_nvram.h>
  96 +#endif
  97
  98  #include "ssb_private.h"
  99
 100 @@ -210,6 +213,7 @@ static void ssb_mips_serial_init(struct
 101  static void ssb_mips_flash_detect(struct ssb_mipscore *mcore)
 102  {
 103         struct ssb_bus *bus = mcore->dev->bus;
 104 +       struct ssb_sflash *sflash = &mcore->sflash;
 105         struct ssb_pflash *pflash = &mcore->pflash;
 106
 107         /* When there is no chipcommon on the bus there is 4MB flash */
 108 @@ -242,7 +246,15 @@ static void ssb_mips_flash_detect(struct
 109         }
 110
 111  ssb_pflash:
 112 -       if (pflash->present) {
 113 +       if (sflash->present) {
 114 +#ifdef CONFIG_BCM47XX
 115 +               bcm47xx_nvram_init_from_mem(sflash->window, sflash->size);
 116 +#endif
 117 +       } else if (pflash->present) {
 118 +#ifdef CONFIG_BCM47XX
 119 +               bcm47xx_nvram_init_from_mem(pflash->window, pflash->window_size);
 120 +#endif
 121 +
 122                 ssb_pflash_data.width = pflash->buswidth;
 123                 ssb_pflash_resource.start = pflash->window;
 124                 ssb_pflash_resource.end = pflash->window + pflash->window_size;