[U-Boot] [PATCH 22/25] x86: crownbay: Add SPI flash support

[Bin Meng]

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---
 arch/x86/cpu/queensbay/tnc.c | 26 +++++++++++++++++++++++++-
 include/configs/crownbay.h   |  2 ++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c
index c0d19aa..eea70c0 100644
--- a/arch/x86/cpu/queensbay/tnc.c
+++ b/arch/x86/cpu/queensbay/tnc.c
@@ -6,17 +6,41 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <asm/pci.h>
 #include <asm/post.h>
 #include <asm/arch/fsp/fsp_support.h>
 
+/* PCI Configuration Space (D31:F0): LPC */
+#define PCH_LPC_DEV	PCI_BDF(0, 0x1f, 0)
+
+static void unprotect_spi_flash(void)
+{
+	u32 bc;
+
+	bc = pci_read_config32(PCH_LPC_DEV, 0xd8);
+	bc |= 0x1;	/* unprotect the flash */
+	pci_write_config32(PCH_LPC_DEV, 0xd8, bc);
+}
+
 int arch_cpu_init(void)
 {
+	struct pci_controller *hose;
+	int ret;
+
 	post_code(POST_CPU_INIT);
 #ifdef CONFIG_SYS_X86_TSC_TIMER
 	timer_set_base(rdtsc());
 #endif
 
-	return x86_cpu_init_f();
+	x86_cpu_init_f();
+
+	ret = pci_early_init_hose(&hose);
+	if (ret)
+		return ret;
+
+	unprotect_spi_flash();
+
+	return 0;
 }
 
 int print_cpuinfo(void)
diff --git a/include/configs/crownbay.h b/include/configs/crownbay.h
index 2314e62..a051b11 100644
--- a/include/configs/crownbay.h
+++ b/include/configs/crownbay.h
@@ -45,6 +45,8 @@
 #define CONFIG_SCSI_DEV_LIST            \
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TCF_SATA}
 
+#define CONFIG_SPI_FLASH_SST
+
 /* Video is not supported */
 #undef CONFIG_VIDEO
 #undef CONFIG_CFB_CONSOLE
-- 
1.8.2.1