From: Shaveta Leekha shaveta@freescale.com
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 --- board/freescale/t4qds/t4qds.c | 60 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 60 insertions(+), 0 deletions(-)
diff --git a/board/freescale/t4qds/t4qds.c b/board/freescale/t4qds/t4qds.c index 88b8ced..ac1ce62 100644 --- a/board/freescale/t4qds/t4qds.c +++ b/board/freescale/t4qds/t4qds.c @@ -393,3 +393,63 @@ void ft_board_setup(void *blob, bd_t *bd) 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]); + } +}