[flashrom] [PATCH] Do not require PCI code for RayeR SPI driver

[Carl-Daniel Hailfinger]

On 20.02.2016 02:36, Carl-Daniel Hailfinger wrote:
> On 20.02.2016 01:24, Stefan Tauner wrote:
>> On Wed, 17 Feb 2016 01:10:41 +0100
>> Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net> wrote:
>>> --- flashrom-libpci_libusb_report_requirements/Makefile	2016-02-17 00:26:37.497626067 +0100
>>> +++ flashrom-rayer_do_not_require_libpci/Makefile	2016-02-17 00:52:46.457405821 +0100
>>> @@ -599,8 +599,7 @@
>>>  ifeq ($(CONFIG_RAYER_SPI), yes)
>>>  FEATURE_CFLAGS += -D'CONFIG_RAYER_SPI=1'
>>>  PROGRAMMER_OBJS += rayer_spi.o
>>> -# Actually, NEED_LIBPCI is wrong. NEED_IOPORT_ACCESS would be more correct.
>> What's wrong with NEED_IOPORT_ACCESS? I'd prefer that (not only because
>> I have read this wannabe FIXME a few dozen times by now... :)
> I didn't want to add NEED_IOPORT_ACCESS, NEED_MEM_ACCESS and
> NEED_MSR_ACCESS.
> The sane way was to combine all three into NEED_RAW_ACCESS.
>
>
>>> -NEED_LIBPCI += CONFIG_RAYER_SPI
>>> +NEED_RAW_ACCESS += CONFIG_RAYER_SPI
>>>  endif
>>>  
>>>  ifeq ($(CONFIG_PONY_SPI), yes)
>>> @@ -807,6 +810,11 @@
>>>  endif
>>>  endif
>>>  
>>> +ifneq ($(NEED_RAW_ACCESS), )
>>> +FEATURE_CFLAGS += -D'NEED_RAW_ACCESS=1'
>>> +PROGRAMMER_OBJS += physmap.o hwaccess.o
>>> +endif
>>> +
>>>  ifneq ($(NEED_LIBUSB0), )
>>>  CHECK_LIBUSB0 = yes
>>>  FEATURE_CFLAGS += -D'NEED_LIBUSB0=1'
>> Apparently this somehow breaks some includes as shown by the buildbot
>> (as discussed on IRC)...
> Thanks for the review!
>
> New version, fixes OpenBSD, NetBSD, FreeBSD, OS X.
> Should compile fine on everything except Android, which was broken since
> r1898 (sys/io.h was suddenly included for all Linux targets instead of
> just for glibc, and Android doesn't have it).
>
> CONFIG_RAYER_SPI only needs raw hardware access, but not libpci.
>
> Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>

New version, fixes Android by disabling CONFIG_RAYER_SPI. Apparently
Android has iopl(), but not inb/outb.

CONFIG_RAYER_SPI only needs raw hardware access, but not libpci.
Disable CONFIG_RAYER_SPI on Android because of missing inb/outb.
Introduce NEED_RAW_ACCESS for raw memory access, PCI port I/O
and MSR access.
 
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006 at gmx.net>

Index: flashrom-rayer_do_not_require_libpci/Makefile
===================================================================
--- flashrom-rayer_do_not_require_libpci/Makefile	(Revision 1931)
+++ flashrom-rayer_do_not_require_libpci/Makefile	(Arbeitskopie)
@@ -349,6 +349,15 @@
 endif
 endif
 
+ifeq ($(TARGET_OS), Android)
+# Android on x86 (currently) does not provide raw PCI port I/O operations
+ifeq ($(CONFIG_RAYER_SPI), yes)
+UNSUPPORTED_FEATURES += CONFIG_RAYER_SPI=yes
+else
+override CONFIG_RAYER_SPI = no
+endif
+endif
+
 ###############################################################################
 # General architecture-specific settings.
 # Like above for the OS, below we verify user-supplied options depending on the target architecture.
@@ -599,8 +608,7 @@
 ifeq ($(CONFIG_RAYER_SPI), yes)
 FEATURE_CFLAGS += -D'CONFIG_RAYER_SPI=1'
 PROGRAMMER_OBJS += rayer_spi.o
-# Actually, NEED_LIBPCI is wrong. NEED_IOPORT_ACCESS would be more correct.
-NEED_LIBPCI += CONFIG_RAYER_SPI
+NEED_RAW_ACCESS += CONFIG_RAYER_SPI
 endif
 
 ifeq ($(CONFIG_PONY_SPI), yes)
@@ -782,19 +790,31 @@
 
 ifneq ($(NEED_LIBPCI), )
 CHECK_LIBPCI = yes
+# This is a dirty hack, but it saves us from checking all PCI drivers and all platforms manually.
+# libpci may need raw memory, MSR or PCI port I/O on some platforms.
+# Individual drivers might have the same needs as well.
+NEED_RAW_ACCESS += $(NEED_LIBPCI)
 FEATURE_CFLAGS += -D'NEED_PCI=1'
 FEATURE_CFLAGS += $(call debug_shell,grep -q "OLD_PCI_GET_DEV := yes" .libdeps && printf "%s" "-D'OLD_PCI_GET_DEV=1'")
 
-PROGRAMMER_OBJS += pcidev.o physmap.o hwaccess.o
+PROGRAMMER_OBJS += pcidev.o
 ifeq ($(TARGET_OS), NetBSD)
 # The libpci we want is called libpciutils on NetBSD and needs NetBSD libpci.
 PCILIBS += -lpciutils -lpci
+else
+PCILIBS += -lpci
+endif
+endif
+
+ifneq ($(NEED_RAW_ACCESS), )
+# Raw memory, MSR or PCI port I/O access.
+FEATURE_CFLAGS += -D'NEED_RAW_ACCESS=1'
+PROGRAMMER_OBJS += physmap.o hwaccess.o
+
+ifeq ($(TARGET_OS), NetBSD)
 # For (i386|x86_64)_iopl(2).
 PCILIBS += -l$(shell uname -p)
 else
-
-PCILIBS += -lpci
-
 ifeq ($(TARGET_OS), OpenBSD)
 # For (i386|amd64)_iopl(2).
 PCILIBS += -l$(shell uname -m)
@@ -805,6 +825,7 @@
 endif
 endif
 endif
+
 endif
 
 ifneq ($(NEED_LIBUSB0), )
Index: flashrom-rayer_do_not_require_libpci/hwaccess.h
===================================================================
--- flashrom-rayer_do_not_require_libpci/hwaccess.h	(Revision 1931)
+++ flashrom-rayer_do_not_require_libpci/hwaccess.h	(Arbeitskopie)
@@ -24,6 +24,8 @@
 #ifndef __HWACCESS_H__
 #define __HWACCESS_H__ 1
 
+#include <sys/types.h>
+
 #include "platform.h"
 
 #if NEED_PCI == 1
@@ -196,7 +198,7 @@
 #define le_to_cpu32 cpu_to_le32
 #define le_to_cpu64 cpu_to_le64
 
-#if NEED_PCI == 1
+#if NEED_RAW_ACCESS == 1
 #if IS_X86
 
 /* sys/io.h provides iopl(2) and x86 I/O port access functions (inb, outb etc).
@@ -376,6 +378,6 @@
 #error Unknown architecture, please check if it supports PCI port IO.
 
 #endif /* IS_* */
-#endif /* NEED_PCI == 1 */
+#endif /* NEED_RAW_ACCESS == 1 */
 
 #endif /* !__HWACCESS_H__ */