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authorStefano Babic <sbabic@denx.de>2014-04-04 11:35:30 +0200
committerStefano Babic <sbabic@denx.de>2014-04-04 11:35:30 +0200
commit1cad23c5f471d695bed1e3907e30caee3c2a3056 (patch)
tree34e035df5db9b327aeae36eff9d0645a915e3177 /board/freescale/t208xrdb/cpld.c
parent5dd73bc0a40a4b318195eab871a1f535aad6b43b (diff)
parent00b132bf34c5be86a108ac7fe8231ad9e97f6de4 (diff)
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Merge branch 'master' of git://git.denx.de/u-boot-arm into master
Conflicts: arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg Signed-off-by: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'board/freescale/t208xrdb/cpld.c')
-rw-r--r--board/freescale/t208xrdb/cpld.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/board/freescale/t208xrdb/cpld.c b/board/freescale/t208xrdb/cpld.c
new file mode 100644
index 0000000..4aa126b
--- /dev/null
+++ b/board/freescale/t208xrdb/cpld.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * Freescale T2080RDB board-specific CPLD controlling supports.
+ */
+
+#include <common.h>
+#include <command.h>
+#include "cpld.h"
+
+u8 cpld_read(unsigned int reg)
+{
+ void *p = (void *)CONFIG_SYS_CPLD_BASE;
+
+ return in_8(p + reg);
+}
+
+void cpld_write(unsigned int reg, u8 value)
+{
+ void *p = (void *)CONFIG_SYS_CPLD_BASE;
+
+ out_8(p + reg, value);
+}
+
+/* Set the boot bank to the alternate bank */
+void cpld_set_altbank(void)
+{
+ u8 reg = CPLD_READ(flash_csr);
+
+ reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
+ CPLD_WRITE(flash_csr, reg);
+ CPLD_WRITE(reset_ctl, CPLD_LBMAP_RESET);
+}
+
+/* Set the boot bank to the default bank */
+void cpld_set_defbank(void)
+{
+ u8 reg = CPLD_READ(flash_csr);
+
+ reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
+ CPLD_WRITE(flash_csr, reg);
+ CPLD_WRITE(reset_ctl, CPLD_LBMAP_RESET);
+}
+
+int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int rc = 0;
+
+ if (argc <= 1)
+ return cmd_usage(cmdtp);
+
+ if (strcmp(argv[1], "reset") == 0) {
+ if (strcmp(argv[2], "altbank") == 0)
+ cpld_set_altbank();
+ else
+ cpld_set_defbank();
+ } else {
+ rc = cmd_usage(cmdtp);
+ }
+
+ return rc;
+}
+
+U_BOOT_CMD(
+ cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
+ "Reset the board or alternate bank",
+ "reset: reset to default bank\n"
+ "cpld reset altbank: reset to alternate bank\n"
+);