Broadcom ARM home routers store SPROM content in NVRAM just like MIPS
ones. To share SPROM code we need to move it out of arch/mips/ to some
common place. We already have bcm47xx_nvram in firmware path and SPROM
should fit there as well.
This driver is responsible for parsing SoC configuration data into a
struct shared between ssb and bcma buses.
This was tested with BCM4706 & BCM5357C0 (BCM47XX) and BCM4708A0
(ARCH_BCM_5301X).
Signed-off-by: Rafał Miłecki <zajec5@xxxxxxxxx>
---
arch/mips/Kconfig | 1 +
arch/mips/bcm47xx/Makefile | 2 +-
arch/mips/bcm47xx/bcm47xx_private.h | 3 ---
arch/mips/bcm47xx/setup.c | 2 +-
drivers/firmware/broadcom/Kconfig | 11 +++++++++
drivers/firmware/broadcom/Makefile | 1 +
.../firmware/broadcom/bcm47xx_sprom.c | 27 ++++++++++++++++------
include/linux/bcm47xx_sprom.h | 24 +++++++++++++++++++
8 files changed, 59 insertions(+), 12 deletions(-)
rename arch/mips/bcm47xx/sprom.c => drivers/firmware/broadcom/bcm47xx_sprom.c (98%)
create mode 100644 include/linux/bcm47xx_sprom.h
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 57a945e..6beb7d1 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -195,6 +195,7 @@ config BCM47XX
select GPIOLIB
select LEDS_GPIO_REGISTER
select BCM47XX_NVRAM
+ select BCM47XX_SPROM
help
Support for BCM47XX based boards
diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile
index 66bea4e..6d86150 100644
--- a/arch/mips/bcm47xx/Makefile
+++ b/arch/mips/bcm47xx/Makefile
@@ -3,5 +3,5 @@
# under Linux.
#
-obj-y += irq.o prom.o serial.o setup.o time.o sprom.o
+obj-y += irq.o prom.o serial.o setup.o time.o
obj-y += board.o buttons.o leds.o workarounds.o
diff --git a/arch/mips/bcm47xx/bcm47xx_private.h b/arch/mips/bcm47xx/bcm47xx_private.h
index 41796be..0367ac7 100644
--- a/arch/mips/bcm47xx/bcm47xx_private.h
+++ b/arch/mips/bcm47xx/bcm47xx_private.h
@@ -10,9 +10,6 @@
/* prom.c */
void __init bcm47xx_prom_highmem_init(void);
-/* sprom.c */
-void bcm47xx_sprom_register_fallbacks(void);
-
/* buttons.c */
int __init bcm47xx_buttons_register(void);
diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
index c807e32..6054d49 100644
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -28,6 +28,7 @@
#include "bcm47xx_private.h"
+#include <linux/bcm47xx_sprom.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/ethtool.h>
@@ -151,7 +152,6 @@ void __init plat_mem_setup(void)
pr_info("Using bcma bus\n");
#ifdef CONFIG_BCM47XX_BCMA
bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
- bcm47xx_sprom_register_fallbacks();
bcm47xx_register_bcma();
bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
#ifdef CONFIG_HIGHMEM
diff --git a/drivers/firmware/broadcom/Kconfig b/drivers/firmware/broadcom/Kconfig
index 6bed119..3c7e5b7 100644
--- a/drivers/firmware/broadcom/Kconfig
+++ b/drivers/firmware/broadcom/Kconfig
@@ -9,3 +9,14 @@ config BCM47XX_NVRAM
This driver provides an easy way to get value of requested parameter.
It simply reads content of NVRAM and parses it. It doesn't control any
hardware part itself.
+
+config BCM47XX_SPROM
+ bool "Broadcom SPROM driver"
+ depends on BCM47XX_NVRAM
+ help
+ Broadcom devices store configuration data in SPROM. Accessing it is
+ specific to the bus host type, e.g. PCI(e) devices have it mapped in
+ a PCI BAR.
+ In case of SoC devices SPROM content is stored on a flash used by
+ bootloader firmware CFE. This driver provides method to ssb and bcma
+ drivers to read SPROM on SoC.
diff --git a/drivers/firmware/broadcom/Makefile b/drivers/firmware/broadcom/Makefile
index d0e6835..f93efc4 100644
--- a/drivers/firmware/broadcom/Makefile
+++ b/drivers/firmware/broadcom/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_BCM47XX_NVRAM) += bcm47xx_nvram.o
+obj-$(CONFIG_BCM47XX_SPROM) += bcm47xx_sprom.o
diff --git a/arch/mips/bcm47xx/sprom.c b/drivers/firmware/broadcom/bcm47xx_sprom.c
similarity index 98%
rename from arch/mips/bcm47xx/sprom.c
rename to drivers/firmware/broadcom/bcm47xx_sprom.c
index 959c145..5dfd459 100644
--- a/arch/mips/bcm47xx/sprom.c
+++ b/drivers/firmware/broadcom/bcm47xx_sprom.c
@@ -26,9 +26,11 @@
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <bcm47xx.h>
-#include <linux/if_ether.h>
+#include <linux/bcm47xx_nvram.h>
+#include <linux/bcma/bcma.h>
#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/ssb/ssb.h>
static void create_key(const char *prefix, const char *postfix,
const char *name, char *buf, int len)
@@ -599,7 +601,7 @@ void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix,
bcm47xx_sprom_fill_auto(sprom, prefix, fallback);
}
-#if defined(CONFIG_BCM47XX_SSB)
+#if defined(CONFIG_SSB_SPROM)
static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
{
char prefix[10];
@@ -622,7 +624,7 @@ static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
}
#endif
-#if defined(CONFIG_BCM47XX_BCMA)
+#if defined(CONFIG_BCMA)
/*
* Having many NVRAM entries for PCI devices led to repeating prefixes like
* pci/1/1/ all the time and wasting flash space. So at some point Broadcom
@@ -706,19 +708,30 @@ static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
}
#endif
+static unsigned int bcm47xx_sprom_registered;
+
/*
* On bcm47xx we need to register SPROM fallback handler very early, so we can't
* use anything like platform device / driver for this.
*/
-void bcm47xx_sprom_register_fallbacks(void)
+int bcm47xx_sprom_register_fallbacks(void)
{
-#if defined(CONFIG_BCM47XX_SSB)
+ if (bcm47xx_sprom_registered)
+ return 0;
+
+#if defined(CONFIG_SSB_SPROM)
if (ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb))
pr_warn("Failed to registered ssb SPROM handler\n");
#endif
-#if defined(CONFIG_BCM47XX_BCMA)
+#if defined(CONFIG_BCMA)
if (bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma))
pr_warn("Failed to registered bcma SPROM handler\n");
#endif
+
+ bcm47xx_sprom_registered = 1;
+
+ return 0;
}
+
+fs_initcall(bcm47xx_sprom_register_fallbacks);
diff --git a/include/linux/bcm47xx_sprom.h b/include/linux/bcm47xx_sprom.h
new file mode 100644
index 0000000..c06b47c
--- /dev/null
+++ b/include/linux/bcm47xx_sprom.h
@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+#ifndef __BCM47XX_SPROM_H
+#define __BCM47XX_SPROM_H
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/vmalloc.h>
+
+#ifdef CONFIG_BCM47XX_SPROM
+int bcm47xx_sprom_register_fallbacks(void);
+#else
+static inline int bcm47xx_sprom_register_fallbacks(void)
+{
+ return -ENOTSUPP;
+};
+#endif
+
+#endif /* __BCM47XX_SPROM_H */
--
1.8.4.5
