soc/amd: Make espi_configure_decodes private

This is only ever called after espi_setup.

55861 - AMD System Peripheral Bus Overview also says that io ranges
should be configured before enabling the BUS_MASTER bit.

BUG=b:183524609
TEST=Boot guybrush to OS

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I074e487d8768a578ee889a125b9948e3aa6c7269
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52059
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/amd/cezanne/early_fch.c

@@ -70,6 +70,5 @@ void fch_early_init(void)
 	if (CONFIG(SOC_AMD_COMMON_BLOCK_USE_ESPI)) {
 		espi_clear_decodes();
 		espi_setup();
-		espi_configure_decodes();
 	}
 }

src/soc/amd/common/block/include/amdblocks/espi.h

@@ -100,12 +100,6 @@ int espi_open_io_window(uint16_t base, size_t size);
  */
 int espi_open_mmio_window(uint32_t base, size_t size);
 
-/*
- * Configure generic and standard I/O decode windows using the espi_config structure settings
- * provided by mainboard in device tree.
- */
-void espi_configure_decodes(void);
-
 /*
  * Clear all configured eSPI memory and I/O decode ranges.  This is useful for changing
  * the decodes, or if something else has previously setup decode windows that conflict

src/soc/amd/common/block/lpc/espi_util.c

@@ -298,19 +298,22 @@ static const struct espi_config *espi_get_config(void)
 	return &soc_cfg->espi_config;
 }
 
-void espi_configure_decodes(void)
+static int espi_configure_decodes(const struct espi_config *cfg)
 {
-	int i;
-	const struct espi_config *cfg = espi_get_config();
+	int i, ret;
 
 	espi_enable_decode(cfg->std_io_decode_bitmap);
 
 	for (i = 0; i < ESPI_GENERIC_IO_WIN_COUNT; i++) {
 		if (cfg->generic_io_range[i].size == 0)
 			continue;
-		espi_open_generic_io_window(cfg->generic_io_range[i].base,
-					    cfg->generic_io_range[i].size);
+		ret = espi_open_generic_io_window(cfg->generic_io_range[i].base,
+						  cfg->generic_io_range[i].size);
+		if (ret)
+			return ret;
 	}
+
+	return 0;
 }
 
 #define ESPI_DN_TX_HDR0			0x00
@@ -966,6 +969,11 @@ int espi_setup(void)
 		return -1;
 	}
 
+	if (espi_configure_decodes(cfg) == -1) {
+		printk(BIOS_ERR, "Error: Configuring decodes failed!\n");
+		return -1;
+	}
+
 	/* Enable subtractive decode if configured */
 	espi_setup_subtractive_decode(cfg);
 

src/soc/amd/picasso/early_fch.c

@@ -77,8 +77,6 @@ void fch_early_init(void)
 	if (CONFIG(DISABLE_SPI_FLASH_ROM_SHARING))
 		lpc_disable_spi_rom_sharing();
 
-	if (CONFIG(SOC_AMD_COMMON_BLOCK_USE_ESPI)) {
+	if (CONFIG(SOC_AMD_COMMON_BLOCK_USE_ESPI))
 		espi_setup();
-		espi_configure_decodes();
-	}
 }

src/soc/amd/picasso/psp_verstage/fch.c

@@ -153,8 +153,6 @@ uint32_t verstage_soc_early_init(void)
 
 void verstage_soc_init(void)
 {
-	if (CONFIG(SOC_AMD_COMMON_BLOCK_USE_ESPI)) {
+	if (CONFIG(SOC_AMD_COMMON_BLOCK_USE_ESPI))
 		espi_setup();
-		espi_configure_decodes();
-	}
 }