software/liblitedram Fix compilation when no SDRAM.

litex/soc/software/liblitedram/sdram_spd.c

@@ -3,7 +3,7 @@
 
 #include <liblitedram/sdram_spd.h>
 
-#ifdef CONFIG_HAS_I2C
+#if defined(CSR_SDRAM_BASE) && defined(CONFIG_HAS_I2C)
 
 #if defined(SDRAM_PHY_DDR4)
 /*
@@ -55,8 +55,8 @@ bool sdram_read_spd(uint8_t spd, uint16_t addr, uint8_t *buf, uint16_t len, bool
 
 	return ok;
 }
-#else /* no CONFIG_HAS_I2C */
+#else /* no CSR_SDRAM_BASE && CONFIG_HAS_I2C */
 bool sdram_read_spd(uint8_t spd, uint16_t addr, uint8_t *buf, uint16_t len, bool send_stop) {
 	return false;
 }
-#endif /* CONFIG_HAS_I2C */
+#endif /* CSR_SDRAM_BASE && CONFIG_HAS_I2C */

litex/soc/software/liblitedram/sdram_spd.h

@@ -7,6 +7,11 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <libbase/i2c.h>
+
+#include <generated/csr.h>
+
+#if defined(CSR_SDRAM_BASE) && defined(CONFIG_HAS_I2C)
+
 #include <generated/sdram_phy.h>
 
 #define SPD_RW_PREAMBLE    0b1010
@@ -25,6 +30,8 @@
 
 #define SDRAM_SPD_SIZE (SDRAM_SPD_PAGES * SDRAM_SPD_PAGE_SIZE)
 
+#endif /* CSR_SDRAM_BASE && CONFIG_HAS_I2C */
+
 bool sdram_read_spd(uint8_t spd, uint16_t addr, uint8_t *buf, uint16_t len, bool send_stop);
 
 #endif /* __SDRAM_SPD_H */

litex/soc/software/liblitedram/utils.c

@@ -8,8 +8,6 @@
 
 #include <libbase/i2c.h>
 
-#include <generated/sdram_phy.h>
-
 #define KIB 1024
 #define MIB (KIB*1024)
 #define GIB (MIB*1024)
@@ -32,6 +30,10 @@ void print_progress(const char * header, uint64_t origin, uint64_t size)
 	printf("   \r");
 }
 
+#ifdef CSR_SDRAM_BASE
+
+#include <generated/sdram_phy.h>
+
 uint64_t sdram_get_supported_memory(void) {
 #ifdef CONFIG_HAS_I2C
 
@@ -59,3 +61,5 @@ uint64_t sdram_get_supported_memory(void) {
 	return SDRAM_PHY_SUPPORTED_MEMORY;
 #endif /* CONFIG_HAS_I2C */
 }
+
+#endif