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authorBin Meng <bmeng.cn@gmail.com>2014-12-17 15:50:44 +0800
committerSimon Glass <sjg@chromium.org>2014-12-18 17:26:07 -0700
commitadfe3b247a7a281931f0fd865e9d00600e9dd384 (patch)
treee2a388dc0df283233d937f35433ab416b3d48307 /arch/x86/cpu/queensbay
parent63faf2507d263bbd6285b3fe637fd80df05a58a0 (diff)
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x86: crownbay: Add SPI flash support
The Crown Bay board has an SST25VF016B flash connected to the Tunnel Creek processor SPI controller used as the BIOS media where U-Boot is stored. Enable this flash support. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu/queensbay')
-rw-r--r--arch/x86/cpu/queensbay/tnc.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c
index 8b9815f..8637cdc 100644
--- a/arch/x86/cpu/queensbay/tnc.c
+++ b/arch/x86/cpu/queensbay/tnc.c
@@ -6,18 +6,42 @@
#include <common.h>
#include <asm/io.h>
+#include <asm/pci.h>
#include <asm/post.h>
+#include <asm/arch/tnc.h>
#include <asm/arch/fsp/fsp_support.h>
#include <asm/processor.h>
+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();
+ ret = x86_cpu_init_f();
+ if (ret)
+ return ret;
+
+ ret = pci_early_init_hose(&hose);
+ if (ret)
+ return ret;
+
+ unprotect_spi_flash();
+
+ return 0;
}
int print_cpuinfo(void)