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-rw-r--r--arch/powerpc/boot/ebony.c45
1 files changed, 41 insertions, 4 deletions
diff --git a/arch/powerpc/boot/ebony.c b/arch/powerpc/boot/ebony.c
index 75daeda..86c0f5d 100644
--- a/arch/powerpc/boot/ebony.c
+++ b/arch/powerpc/boot/ebony.c
@@ -24,12 +24,11 @@
#include "page.h"
#include "ops.h"
#include "reg.h"
+#include "io.h"
#include "dcr.h"
+#include "4xx.h"
#include "44x.h"
-extern char _dtb_start[];
-extern char _dtb_end[];
-
static u8 *ebony_mac0, *ebony_mac1;
/* Calculate 440GP clocks */
@@ -92,15 +91,53 @@ void ibm440gp_fixup_clocks(unsigned int sysclk, unsigned int ser_clk)
dt_fixup_clock("/plb/opb/serial@40000300", uart1);
}
+#define EBONY_FPGA_PATH "/plb/opb/ebc/fpga"
+#define EBONY_FPGA_FLASH_SEL 0x01
+#define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash"
+
+static void ebony_flashsel_fixup(void)
+{
+ void *devp;
+ u32 reg[3] = {0x0, 0x0, 0x80000};
+ u8 *fpga;
+ u8 fpga_reg0 = 0x0;
+
+ devp = finddevice(EBONY_FPGA_PATH);
+ if (!devp)
+ fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);
+
+ if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
+ fatal("%s has missing or invalid virtual-reg property\n\r",
+ EBONY_FPGA_PATH);
+
+ fpga_reg0 = in_8(fpga);
+
+ devp = finddevice(EBONY_SMALL_FLASH_PATH);
+ if (!devp)
+ fatal("Couldn't locate small flash node %s\n\r",
+ EBONY_SMALL_FLASH_PATH);
+
+ if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
+ fatal("%s has reg property of unexpected size\n\r",
+ EBONY_SMALL_FLASH_PATH);
+
+ /* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
+ if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
+ reg[1] ^= 0x80000;
+
+ setprop(devp, "reg", reg, sizeof(reg));
+}
+
static void ebony_fixups(void)
{
// FIXME: sysclk should be derived by reading the FPGA registers
unsigned long sysclk = 33000000;
ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
- ibm44x_fixup_memsize();
+ ibm4xx_fixup_memsize();
dt_fixup_mac_addresses(ebony_mac0, ebony_mac1);
ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
+ ebony_flashsel_fixup();
}
void ebony_init(void *mac0, void *mac1)
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