Merge git://www.denx.de/git/u-boot

Conflicts:

	CREDITS

1 files changed, 458 insertions, 0 deletions

diff --git a/board/lwmon5/kbd.c b/board/lwmon5/kbd.c
new file mode 100644
index 0000000..1e5349a
--- /dev/null
+++ b/board/lwmon5/kbd.c
@@ -0,0 +1,458 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * (C) Copyright 2001, 2002
+ * DENX Software Engineering
+ * Wolfgang Denk, wd@denx.de
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* define DEBUG for debugging output (obviously ;-)) */
+#if 0
+#define DEBUG
+#endif
+
+#include <common.h>
+#include <i2c.h>
+#include <command.h>
+#include <post.h>
+#include <serial.h>
+#include <malloc.h>
+
+#include <linux/types.h>
+#include <linux/string.h>	/* for strdup */
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void kbd_init (void);
+static int compare_magic (uchar *kbd_data, uchar *str);
+
+/*--------------------- Local macros and constants --------------------*/
+#define	_NOT_USED_	0xFFFFFFFF
+
+/*------------------------- Keyboard controller -----------------------*/
+/* command codes */
+#define	KEYBD_CMD_READ_KEYS	0x01
+#define KEYBD_CMD_READ_VERSION	0x02
+#define KEYBD_CMD_READ_STATUS	0x03
+#define KEYBD_CMD_RESET_ERRORS	0x10
+
+/* status codes */
+#define KEYBD_STATUS_MASK	0x3F
+#define	KEYBD_STATUS_H_RESET	0x20
+#define KEYBD_STATUS_BROWNOUT	0x10
+#define KEYBD_STATUS_WD_RESET	0x08
+#define KEYBD_STATUS_OVERLOAD	0x04
+#define KEYBD_STATUS_ILLEGAL_WR	0x02
+#define KEYBD_STATUS_ILLEGAL_RD	0x01
+
+/* Number of bytes returned from Keyboard Controller */
+#define KEYBD_VERSIONLEN	2	/* version information */
+
+/*
+ * This is different from the "old" lwmon dsPIC kbd controller
+ * implementation. Now the controller still answers with 9 bytes,
+ * but the last 3 bytes are always "0x06 0x07 0x08". So we just
+ * set the length to compare to 6 instead of 9.
+ */
+#define	KEYBD_DATALEN		6	/* normal key scan data */
+
+/* maximum number of "magic" key codes that can be assigned */
+
+static uchar kbd_addr = CFG_I2C_KEYBD_ADDR;
+
+static uchar *key_match (uchar *);
+
+#define	KEYBD_SET_DEBUGMODE	'#'	/* Magic key to enable debug output */
+
+/***********************************************************************
+F* Function:     int board_postclk_init (void) P*A*Z*
+ *
+P* Parameters:   none
+P*
+P* Returnvalue:  int
+P*                - 0 is always returned.
+ *
+Z* Intention:    This function is the board_postclk_init() method implementation
+Z*               for the lwmon board.
+ *
+ ***********************************************************************/
+int board_postclk_init (void)
+{
+	kbd_init();
+
+	return (0);
+}
+
+static void kbd_init (void)
+{
+	uchar kbd_data[KEYBD_DATALEN];
+	uchar tmp_data[KEYBD_DATALEN];
+	uchar val, errcd;
+	int i;
+
+	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+	gd->kbd_status = 0;
+
+	/* Forced by PIC. Delays <= 175us loose */
+	udelay(1000);
+
+	/* Read initial keyboard error code */
+	val = KEYBD_CMD_READ_STATUS;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	i2c_read (kbd_addr, 0, 0, &errcd, 1);
+	/* clear unused bits */
+	errcd &= KEYBD_STATUS_MASK;
+	/* clear "irrelevant" bits. Recommended by Martin Rajek, LWN */
+	errcd &= ~(KEYBD_STATUS_H_RESET|KEYBD_STATUS_BROWNOUT);
+	if (errcd) {
+		gd->kbd_status |= errcd << 8;
+	}
+	/* Reset error code and verify */
+	val = KEYBD_CMD_RESET_ERRORS;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	udelay(1000);	/* delay NEEDED by keyboard PIC !!! */
+
+	val = KEYBD_CMD_READ_STATUS;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	i2c_read (kbd_addr, 0, 0, &val, 1);
+
+	val &= KEYBD_STATUS_MASK;	/* clear unused bits */
+	if (val) {			/* permanent error, report it */
+		gd->kbd_status |= val;
+		return;
+	}
+
+	/*
+	 * Read current keyboard state.
+	 *
+	 * After the error reset it may take some time before the
+	 * keyboard PIC picks up a valid keyboard scan - the total
+	 * scan time is approx. 1.6 ms (information by Martin Rajek,
+	 * 28 Sep 2002). We read a couple of times for the keyboard
+	 * to stabilize, using a big enough delay.
+	 * 10 times should be enough. If the data is still changing,
+	 * we use what we get :-(
+	 */
+
+	memset (tmp_data, 0xFF, KEYBD_DATALEN);	/* impossible value */
+	for (i=0; i<10; ++i) {
+		val = KEYBD_CMD_READ_KEYS;
+		i2c_write (kbd_addr, 0, 0, &val, 1);
+		i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
+
+		if (memcmp(kbd_data, tmp_data, KEYBD_DATALEN) == 0) {
+			/* consistent state, done */
+			break;
+		}
+		/* remeber last state, delay, and retry */
+		memcpy (tmp_data, kbd_data, KEYBD_DATALEN);
+		udelay (5000);
+	}
+}
+
+/***********************************************************************
+F* Function:     int misc_init_r (void) P*A*Z*
+ *
+P* Parameters:   none
+P*
+P* Returnvalue:  int
+P*                - 0 is always returned, even in the case of a keyboard
+P*                    error.
+ *
+Z* Intention:    This function is the misc_init_r() method implementation
+Z*               for the lwmon board.
+Z*               The keyboard controller is initialized and the result
+Z*               of a read copied to the environment variable "keybd".
+Z*               If KEYBD_SET_DEBUGMODE is defined, a check is made for
+Z*               this key, and if found display to the LCD will be enabled.
+Z*               The keys in "keybd" are checked against the magic
+Z*               keycommands defined in the environment.
+Z*               See also key_match().
+ *
+D* Design:       wd@denx.de
+C* Coding:       wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+int misc_init_r_kbd (void)
+{
+	uchar kbd_data[KEYBD_DATALEN];
+	char keybd_env[2 * KEYBD_DATALEN + 1];
+	uchar kbd_init_status = gd->kbd_status >> 8;
+	uchar kbd_status = gd->kbd_status;
+	uchar val;
+	char *str;
+	int i;
+
+	if (kbd_init_status) {
+		printf ("KEYBD: Error %02X\n", kbd_init_status);
+	}
+	if (kbd_status) {		/* permanent error, report it */
+		printf ("*** Keyboard error code %02X ***\n", kbd_status);
+		sprintf (keybd_env, "%02X", kbd_status);
+		setenv ("keybd", keybd_env);
+		return 0;
+	}
+
+	/*
+	 * Now we know that we have a working  keyboard,  so  disable
+	 * all output to the LCD except when a key press is detected.
+	 */
+
+	if ((console_assign (stdout, "serial") < 0) ||
+		(console_assign (stderr, "serial") < 0)) {
+		printf ("Can't assign serial port as output device\n");
+	}
+
+	/* Read Version */
+	val = KEYBD_CMD_READ_VERSION;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_VERSIONLEN);
+	printf ("KEYBD: Version %d.%d\n", kbd_data[0], kbd_data[1]);
+
+	/* Read current keyboard state */
+	val = KEYBD_CMD_READ_KEYS;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
+
+	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 KEYBD_SET_DEBUGMODE
+	if (kbd_data[0] == KEYBD_SET_DEBUGMODE) {	/* set debug mode */
+		if ((console_assign (stdout, "lcd") < 0) ||
+			(console_assign (stderr, "lcd") < 0)) {
+			printf ("Can't assign LCD display as output device\n");
+		}
+	}
+#endif /* KEYBD_SET_DEBUGMODE */
+#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);
+	}
+	return (0);
+}
+
+#ifdef CONFIG_PREBOOT
+
+static uchar kbd_magic_prefix[] = "key_magic";
+static uchar kbd_command_prefix[] = "key_cmd";
+
+static int compare_magic (uchar *kbd_data, uchar *str)
+{
+	uchar compare[KEYBD_DATALEN-1];
+	char *nxt;
+	int i;
+
+	/* Don't include modifier byte */
+	memcpy (compare, kbd_data+1, KEYBD_DATALEN-1);
+
+	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;
+}
+
+/***********************************************************************
+F* Function:     static uchar *key_match (uchar *kbd_data) P*A*Z*
+ *
+P* Parameters:   uchar *kbd_data
+P*                - The keys to match against our magic definitions
+P*
+P* Returnvalue:  uchar *
+P*                - != NULL: Pointer to the corresponding command(s)
+P*                     NULL: No magic is about to happen
+ *
+Z* Intention:    Check if pressed key(s) match magic sequence,
+Z*               and return the command string associated with that key(s).
+Z*
+Z*               If no key press was decoded, NULL is returned.
+Z*
+Z*               Note: the first character of the argument will be
+Z*                     overwritten with the "magic charcter code" of the
+Z*                     decoded key(s), or '\0'.
+Z*
+Z*               Note: the string points to static environment data
+Z*                     and must be saved before you call any function that
+Z*                     modifies the environment.
+ *
+D* Design:       wd@denx.de
+C* Coding:       wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+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);
+		debug ("### Check magic \"%s\"\n", magic);
+		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);
+			debug ("### Set PREBOOT to $(%s): \"%s\"\n",
+					cmd_name, cmd ? cmd : "<<NULL>>");
+			*kbd_data = *suffix;
+			return ((uchar *)cmd);
+		}
+	}
+	debug ("### Delete PREBOOT\n");
+	*kbd_data = '\0';
+	return (NULL);
+}
+#endif /* CONFIG_PREBOOT */
+
+/***********************************************************************
+F* Function:     int do_kbd (cmd_tbl_t *cmdtp, int flag,
+F*                           int argc, char *argv[]) P*A*Z*
+ *
+P* Parameters:   cmd_tbl_t *cmdtp
+P*                - Pointer to our command table entry
+P*               int flag
+P*                - If the CMD_FLAG_REPEAT bit is set, then this call is
+P*                  a repetition
+P*               int argc
+P*                - Argument count
+P*               char *argv[]
+P*                - Array of the actual arguments
+P*
+P* Returnvalue:  int
+P*                - 0 is always returned.
+ *
+Z* Intention:    Implement the "kbd" command.
+Z*               The keyboard status is read.  The result is printed on
+Z*               the console and written into the "keybd" environment
+Z*               variable.
+ *
+D* Design:       wd@denx.de
+C* Coding:       wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+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];
+	uchar val;
+	int i;
+
+#if 0 /* Done in kbd_init */
+	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+#endif
+
+	/* Read keys */
+	val = KEYBD_CMD_READ_KEYS;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
+
+	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
+);
+
+/*----------------------------- Utilities -----------------------------*/
+
+#ifdef CONFIG_POST
+/*
+ * Returns 1 if keys pressed to start the power-on long-running tests
+ * Called from board_init_f().
+ */
+int post_hotkeys_pressed(void)
+{
+	uchar kbd_data[KEYBD_DATALEN];
+	uchar val;
+
+	/* Read keys */
+	val = KEYBD_CMD_READ_KEYS;
+	i2c_write (kbd_addr, 0, 0, &val, 1);
+	i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
+
+	return (compare_magic(kbd_data, (uchar *)CONFIG_POST_KEY_MAGIC) == 0);
+}
+#endif