[PATCH 3/3] GTA01: use POWER button to append debug parameters to the kernel command line
Paul Fertser
fercerpav at gmail.com
Sat Jan 17 13:37:43 CET 2009
This patch is based on the one tested on GTA02, it compiles but i could not
verify if it works.
---
src/cpu/s3c2410/gta01.c | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/src/cpu/s3c2410/gta01.c b/src/cpu/s3c2410/gta01.c
index db7d653..c8ff25e 100644
--- a/src/cpu/s3c2410/gta01.c
+++ b/src/cpu/s3c2410/gta01.c
@@ -209,31 +209,34 @@ static void close_gta01(void)
(bb_s3c24xx.close)();
}
-static u8 get_ui_keys_gta02(void)
+/* Here we will care only about AUX button as polling for PWR button
+ * through i2c slows down the boot */
+
+static u8 get_ui_keys_gta01(void)
{
u8 keys;
- u8 ret;
+ u8 ret = 0;
static u8 old_keys = 0; /* previous state for debounce */
- static u8 old_ret = 0; /* previous debounced output for edge detect */
+ static u8 older_keys = 0; /* previous debounced output for edge detect */
- /* GPF6 is AUX on GTA01, map to UI_ACTION_ADD_DEBUG, down = 1 */
+ /* GPF6 is AUX on GTA01, map to UI_ACTION_SKIPKERNEL, down = 0 */
keys = ! (rGPFDAT & (1 << 6));
- if (keys == old_keys)
- ret = keys;
- else
- ret = old_keys;
-
/* edge action */
- if ((ret & 1) && !(old_ret & 1))
+ if ((old_keys & 1) && !(older_keys & 1))
ret |= UI_ACTION_SKIPKERNEL;
+ older_keys = old_keys;
old_keys = keys;
- old_ret = ret;
return ret;
}
+static u8 get_ui_debug_gta01(void)
+{
+ /* PWR button state can be seen in OOCS b0, down = 0, map to UI_ACTION_ADD_DEBUG */
+ return !(i2c_read_sync(&bb_s3c24xx, PCF50606_I2C_ADS, PCF50606_REG_OOCS) & 1);
+}
/*
* API for bootloader on this machine
@@ -250,7 +253,8 @@ const struct board_api board_api_gta01 = {
.port_init = port_init_gta01,
.putc = putc_gta01,
.close = close_gta01,
- .get_ui_keys = get_ui_keys_gta02,
+ .get_ui_keys = get_ui_keys_gta01,
+ .get_ui_debug = get_ui_debug_gta01,
.commandline_board = "mtdparts=" \
"neo1973-nand:" \
--
1.5.2.2
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