software: create liblitespi and mode litespi code to it (with some parts commented out for now).

litex/soc/integration/builder.py

@@ -27,6 +27,7 @@ soc_software_packages = [
     "libbase",
     "liblitedram",
     "libliteeth",
+    "liblitespi",
     "liblitesdcard",
     "bios"
 ]

litex/soc/software/bios/Makefile

@@ -62,6 +62,7 @@ bios.elf: $(BIOS_DIRECTORY)/linker.ld $(OBJECTS)
 	../libbase/libbase-nofloat.a \
 	../liblitedram/liblitedram.a \
 	../libliteeth/libliteeth.a \
+	../liblitespi/liblitespi.a \
 	../liblitesdcard/liblitesdcard.a
 	$(LD) $(LDFLAGS) -T $(BIOS_DIRECTORY)/linker.ld -N -o $@ \
 		../libbase/crt0-ctr.o \
@@ -70,9 +71,10 @@ bios.elf: $(BIOS_DIRECTORY)/linker.ld $(OBJECTS)
 		-L../libbase \
 		-L../liblitedram \
 		-L../libliteeth \
+		-L../liblitespi \
 		-L../liblitesdcard \
 		$(BP_LIBS) \
-		-lcompiler_rt -llitedram -lliteeth -llitesdcard -lbase-nofloat \
+		-lcompiler_rt -llitedram -lliteeth -llitespi -llitesdcard -lbase-nofloat \
 		$(BP_FLAGS)
 
 ifneq ($(OS),Windows_NT)

litex/soc/software/bios/main.c

@@ -44,7 +44,7 @@
 
 #include "sdram.h"
 #include "sdcard.h"
-#include "spi.h"
+//#include "spi.h"
 #include "boot.h"
 #include "readline.h"
 #include "helpers.h"
@@ -135,9 +135,9 @@ int main(int i, char **c)
 		printf("Memory initialization failed\n");
 	printf("\n");
 #endif
-#ifdef CSR_SPI_BASE
-	spi_autoconfig();
-#endif
+//#ifdef CSR_SPI_BASE
+//	spi_autoconfig();
+//#endif
 
 	if(sdr_ok) {
 		printf("--============== \e[1mBoot\e[0m ==================--\n");

litex/soc/software/liblitespi/Makefile

@@ -0,0 +1,23 @@
+include ../include/generated/variables.mak
+include $(SOC_DIRECTORY)/software/common.mak
+
+OBJECTS=spiflash.o
+
+all: liblitespi.a
+
+liblitespi.a: $(OBJECTS)
+	$(AR) crs liblitespi.a $(OBJECTS)
+
+# pull in dependency info for *existing* .o files
+-include $(OBJECTS:.o=.d)
+
+%.o: $(LIBLITESPI_DIRECTORY)/%.c
+	$(compile)
+
+%.o: %.S
+	$(assemble)
+
+.PHONY: all clean
+
+clean:
+	$(RM) $(OBJECTS) liblitespi.a .*~ *~

litex/soc/software/liblitespi/spiflash.c

@@ -8,10 +8,11 @@
 
 #include <generated/csr.h>
 #include <generated/mem.h>
-#include <hw/flags.h>
 #include <system.h>
 
-#include "spi.h"
+#include "spiflash.h"
+
+#ifdef SPIXIP_BASE
 
 #define DEBUG	0
 #define USER_DEFINED_DUMMY_BITS	0
@@ -60,6 +61,8 @@ int spi_frequency_test(void)
 	return lowest_div;
 }
 
+#endif
+
 void spi_dummy_bits_setup(unsigned int dummy_bits)
 {
 	spi_dummy_bits_write((uint32_t)dummy_bits);

litex/soc/software/liblitespi/spiflash.h

@@ -1,5 +1,5 @@
-#ifndef __SPI_H
-#define __SPI_H
+#ifndef __LITESPI_FLASH_H
+#define __LITESPI_FLASH_H
 
 #include <generated/csr.h>
 
@@ -15,4 +15,4 @@ int spi_frequency_test(void);
 void spi_dummy_bits_setup(unsigned int dummy_bits);
 void spi_autoconfig(void);
 
-#endif /* __SPI_H */
+#endif /* __LITESPI_FLASH_H */