[U-Boot] [PATCH 25/28] freescale/qixis: Add support for booting from NAND

York Sun
2015-03-19T16:45:56Z

From: Scott Wood <scottwood@freescale.com>

Use "qixis_reset nand" to reset the board to boot from NAND.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
board/freescale/common/qixis.c | 31 +++++++++++++++++++++----------
1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/board/freescale/common/qixis.c b/board/freescale/common/qixis.c
index a49e300..9f6b0e7 100644
--- a/board/freescale/common/qixis.c
+++ b/board/freescale/common/qixis.c
@@ -138,24 +138,23 @@ void qixis_bank_reset(void)
QIXIS_WRITE(rcfg_ctl, QIXIS_RCFG_CTL_RECONFIG_START);
}

-/* Set the boot bank to the power-on default bank */
-void clear_altbank(void)
+static void __maybe_unused set_lbmap(int lbmap)
{
u8 reg;

reg = QIXIS_READ(brdcfg[0]);
- reg = (reg & ~QIXIS_LBMAP_MASK) | QIXIS_LBMAP_DFLTBANK;
+ reg = (reg & ~QIXIS_LBMAP_MASK) | lbmap;
QIXIS_WRITE(brdcfg[0], reg);
}

-/* Set the boot bank to the alternate bank */
-void set_altbank(void)
+static void __maybe_unused set_rcw_src(int rcw_src)
{
u8 reg;

- reg = QIXIS_READ(brdcfg[0]);
- reg = (reg & ~QIXIS_LBMAP_MASK) | QIXIS_LBMAP_ALTBANK;
- QIXIS_WRITE(brdcfg[0], reg);
+ reg = QIXIS_READ(dutcfg[1]);
+ reg = (reg & ~1) | (rcw_src & 1);
+ QIXIS_WRITE(dutcfg[1], reg);
+ QIXIS_WRITE(dutcfg[0], (rcw_src >> 1) & 0xff);
}

static void qixis_dump_regs(void)
@@ -201,11 +200,22 @@ int qixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int i;

if (argc <= 1) {
- clear_altbank();
+ set_lbmap(QIXIS_LBMAP_DFLTBANK);
qixis_reset();
} else if (strcmp(argv[1], "altbank") == 0) {
- set_altbank();
+ set_lbmap(QIXIS_LBMAP_ALTBANK);
qixis_bank_reset();
+ } else if (strcmp(argv[1], "nand") == 0) {
+#ifdef QIXIS_LBMAP_NAND
+ QIXIS_WRITE(rst_ctl, 0x30);
+ QIXIS_WRITE(rcfg_ctl, 0);
+ set_lbmap(QIXIS_LBMAP_NAND);
+ set_rcw_src(QIXIS_RCW_SRC_NAND);
+ QIXIS_WRITE(rcfg_ctl, 0x20);
+ QIXIS_WRITE(rcfg_ctl, 0x21);
+#else
+ printf("Not implemented\n");
+#endif
} else if (strcmp(argv[1], "watchdog") == 0) {
static char *period[9] = {"2s", "4s", "8s", "16s", "32s",
"1min", "2min", "4min", "8min"};
@@ -244,6 +254,7 @@ U_BOOT_CMD(
"Reset the board using the FPGA sequencer",
"- hard reset to default bank\n"
"qixis_reset altbank - reset to alternate bank\n"
+ "qixis_reset nand - reset to nand\n"
"qixis watchdog <watchdog_period> - set the watchdog period\n"
" period: 1s 2s 4s 8s 16s 32s 1min 2min 4min 8min\n"
"qixis_reset dump - display the QIXIS registers\n"
--
1.7.9.5