powerpc/t4240qds: Add support to dump switch settings on t4240qds board
This function is called by "qixis_reset switch" command and
switch settings are calculated from qixis FPGA registers.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/board/freescale/t4qds/t4qds.c b/board/freescale/t4qds/t4qds.c
index 392c8c0..4233e15 100644
--- a/board/freescale/t4qds/t4qds.c
+++ b/board/freescale/t4qds/t4qds.c
@@ -405,3 +405,63 @@
fdt_fixup_board_enet(blob);
#endif
}
+
+/*
+ * Reverse engineering switch settings.
+ * Some bits cannot be figured out. They will be displayed as
+ * underscore in binary format. mask[] has those bits.
+ * Some bits are calculated differently than the actual switches
+ * if booting with overriding by FPGA.
+ */
+void qixis_dump_switch(void)
+{
+ int i;
+ u8 sw[9];
+
+ /*
+ * Any bit with 1 means that bit cannot be reverse engineered.
+ * It will be displayed as _ in binary format.
+ */
+ static const u8 mask[] = {0, 0, 0, 0, 0, 0x1, 0xdf, 0x3f, 0x1f};
+ char buf[10];
+ u8 brdcfg[16], dutcfg[16];
+
+ for (i = 0; i < 16; i++) {
+ brdcfg[i] = qixis_read(offsetof(struct qixis, brdcfg[0]) + i);
+ dutcfg[i] = qixis_read(offsetof(struct qixis, dutcfg[0]) + i);
+ }
+
+ sw[0] = dutcfg[0];
+ sw[1] = (dutcfg[1] << 0x07) | \
+ ((dutcfg[12] & 0xC0) >> 1) | \
+ ((dutcfg[11] & 0xE0) >> 3) | \
+ ((dutcfg[6] & 0x80) >> 6) | \
+ ((dutcfg[1] & 0x80) >> 7);
+ sw[2] = ((brdcfg[1] & 0x0f) << 4) | \
+ ((brdcfg[1] & 0x30) >> 2) | \
+ ((brdcfg[1] & 0x40) >> 5) | \
+ ((brdcfg[1] & 0x80) >> 7);
+ sw[3] = brdcfg[2];
+ sw[4] = ((dutcfg[2] & 0x01) << 7) | \
+ ((dutcfg[2] & 0x06) << 4) | \
+ ((~QIXIS_READ(present)) & 0x10) | \
+ ((brdcfg[3] & 0x80) >> 4) | \
+ ((brdcfg[3] & 0x01) << 2) | \
+ ((brdcfg[6] == 0x62) ? 3 : \
+ ((brdcfg[6] == 0x5a) ? 2 : \
+ ((brdcfg[6] == 0x5e) ? 1 : 0)));
+ sw[5] = ((brdcfg[0] & 0x0f) << 4) | \
+ ((QIXIS_READ(rst_ctl) & 0x30) >> 2) | \
+ ((brdcfg[0] & 0x40) >> 5);
+ sw[6] = (brdcfg[11] & 0x20);
+ sw[7] = (((~QIXIS_READ(rst_ctl)) & 0x40) << 1) | \
+ ((brdcfg[5] & 0x10) << 2);
+ sw[8] = ((brdcfg[12] & 0x08) << 4) | \
+ ((brdcfg[12] & 0x03) << 5);
+
+ puts("DIP switch (reverse-engineering)\n");
+ for (i = 0; i < 9; i++) {
+ printf("SW%d = 0b%s (0x%02x)\n",
+ i + 1, byte_to_binary_mask(sw[i], mask[i], buf), sw[i]);
+ }
+}