delta board: support for magic key detection and handling.
diff --git a/board/delta/delta.c b/board/delta/delta.c
index b7671dd..b127ac8 100644
--- a/board/delta/delta.c
+++ b/board/delta/delta.c
@@ -28,6 +28,8 @@
#include <common.h>
#include <i2c.h>
#include <da9030.h>
+#include <malloc.h>
+#include <command.h>
#include <asm/arch/pxa-regs.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -35,6 +37,9 @@
/* ------------------------------------------------------------------------- */
static void init_DA9030(void);
+static void keys_init(void);
+static void get_pressed_keys(uchar *s);
+static uchar *key_match(uchar *kbd_data);
/*
* Miscelaneous platform dependent initialisations
@@ -56,13 +61,216 @@
int board_late_init(void)
{
+#ifdef DELTA_CHECK_KEYBD
+ uchar kbd_data[KEYBD_DATALEN];
+ char keybd_env[2 * KEYBD_DATALEN + 1];
+ char *str;
+ int i;
+#endif /* DELTA_CHECK_KEYBD */
+
setenv("stdout", "serial");
setenv("stderr", "serial");
+
+#ifdef DELTA_CHECK_KEYBD
+ keys_init();
+
+ memset(kbd_data, '\0', KEYBD_DATALEN);
+
+ /* check for pressed keys and setup keybd_env */
+ get_pressed_keys(kbd_data);
+
+ for (i = 0; i < KEYBD_DATALEN; ++i) {
+ sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
+ }
+ setenv ("keybd", keybd_env);
+
+ str = strdup ((char *)key_match (kbd_data)); /* decode keys */
+
+# ifdef CONFIG_PREBOOT /* automatically configure "preboot" command on key match */
+ setenv ("preboot", str); /* set or delete definition */
+# endif /* CONFIG_PREBOOT */
+ if (str != NULL) {
+ free (str);
+ }
+#endif /* DELTA_CHECK_KEYBD */
+
init_DA9030();
return 0;
}
+/*
+ * Magic Key Handling, mainly copied from board/lwmon/lwmon.c
+ */
+#ifdef DELTA_CHECK_KEYBD
+
+static uchar kbd_magic_prefix[] = "key_magic";
+static uchar kbd_command_prefix[] = "key_cmd";
+
+/*
+ * Get pressed keys
+ * s is a buffer of size KEYBD_DATALEN-1
+ */
+static void get_pressed_keys(uchar *s)
+{
+ unsigned long val;
+ val = GPLR3;
+
+ if(val & (1<<31))
+ *s++ = KEYBD_KP_DKIN0;
+ if(val & (1<<18))
+ *s++ = KEYBD_KP_DKIN1;
+ if(val & (1<<29))
+ *s++ = KEYBD_KP_DKIN2;
+ if(val & (1<<22))
+ *s++ = KEYBD_KP_DKIN5;
+}
+
+static void keys_init()
+{
+ CKENB |= CKENB_7_GPIO;
+ udelay(100);
+
+ /* Configure GPIOs */
+ GPIO127 = 0xa840; /* KP_DKIN0 */
+ GPIO114 = 0xa840; /* KP_DKIN1 */
+ GPIO125 = 0xa840; /* KP_DKIN2 */
+ GPIO118 = 0xa840; /* KP_DKIN5 */
+
+ /* Configure GPIOs as inputs */
+ GPDR3 &= ~(1<<31 | 1<<18 | 1<<29 | 1<<22);
+ GCDR3 = (1<<31 | 1<<18 | 1<<29 | 1<<22);
+
+ udelay(100);
+}
+
+static int compare_magic (uchar *kbd_data, uchar *str)
+{
+ /* uchar compare[KEYBD_DATALEN-1]; */
+ uchar compare[KEYBD_DATALEN];
+ char *nxt;
+ int i;
+
+ /* Don't include modifier byte */
+ /* memcpy (compare, kbd_data+1, KEYBD_DATALEN-1); */
+ memcpy (compare, kbd_data, KEYBD_DATALEN);
+
+ for (; str != NULL; str = (*nxt) ? (uchar *)(nxt+1) : (uchar *)nxt) {
+ uchar c;
+ int k;
+
+ c = (uchar) simple_strtoul ((char *)str, (char **) (&nxt), 16);
+
+ if (str == (uchar *)nxt) { /* invalid character */
+ break;
+ }
+
+ /*
+ * Check if this key matches the input.
+ * Set matches to zero, so they match only once
+ * and we can find duplicates or extra keys
+ */
+ for (k = 0; k < sizeof(compare); ++k) {
+ if (compare[k] == '\0') /* only non-zero entries */
+ continue;
+ if (c == compare[k]) { /* found matching key */
+ compare[k] = '\0';
+ break;
+ }
+ }
+ if (k == sizeof(compare)) {
+ return -1; /* unmatched key */
+ }
+ }
+
+ /*
+ * A full match leaves no keys in the `compare' array,
+ */
+ for (i = 0; i < sizeof(compare); ++i) {
+ if (compare[i])
+ {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+static uchar *key_match (uchar *kbd_data)
+{
+ char magic[sizeof (kbd_magic_prefix) + 1];
+ uchar *suffix;
+ char *kbd_magic_keys;
+
+ /*
+ * The following string defines the characters that can pe appended
+ * to "key_magic" to form the names of environment variables that
+ * hold "magic" key codes, i. e. such key codes that can cause
+ * pre-boot actions. If the string is empty (""), then only
+ * "key_magic" is checked (old behaviour); the string "125" causes
+ * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
+ */
+ if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
+ kbd_magic_keys = "";
+
+ /* loop over all magic keys;
+ * use '\0' suffix in case of empty string
+ */
+ for (suffix=(uchar *)kbd_magic_keys; *suffix || suffix==(uchar *)kbd_magic_keys; ++suffix) {
+ sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
+#if 0
+ printf ("### Check magic \"%s\"\n", magic);
+#endif
+ if (compare_magic(kbd_data, (uchar *)getenv(magic)) == 0) {
+ char cmd_name[sizeof (kbd_command_prefix) + 1];
+ char *cmd;
+
+ sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
+
+ cmd = getenv (cmd_name);
+#if 0
+ printf ("### Set PREBOOT to $(%s): \"%s\"\n",
+ cmd_name, cmd ? cmd : "<<NULL>>");
+#endif
+ *kbd_data = *suffix;
+ return ((uchar *)cmd);
+ }
+ }
+#if 0
+ printf ("### Delete PREBOOT\n");
+#endif
+ *kbd_data = '\0';
+ return (NULL);
+}
+
+int do_kbd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ uchar kbd_data[KEYBD_DATALEN];
+ char keybd_env[2 * KEYBD_DATALEN + 1];
+ int i;
+
+ /* Read keys */
+ get_pressed_keys(kbd_data);
+ puts ("Keys:");
+ for (i = 0; i < KEYBD_DATALEN; ++i) {
+ sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
+ printf (" %02x", kbd_data[i]);
+ }
+ putc ('\n');
+ setenv ("keybd", keybd_env);
+ return 0;
+}
+
+U_BOOT_CMD(
+ kbd, 1, 1, do_kbd,
+ "kbd - read keyboard status\n",
+ NULL
+);
+
+#endif /* DELTA_CHECK_KEYBD */
+
+
int dram_init (void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;