diff options
Diffstat (limited to 'board/lwmon5')
| -rw-r--r-- | board/lwmon5/Makefile | 2 | ||||
| -rw-r--r-- | board/lwmon5/kbd.c | 458 | ||||
| -rw-r--r-- | board/lwmon5/lwmon5.c | 40 |
3 files changed, 490 insertions, 10 deletions
diff --git a/board/lwmon5/Makefile b/board/lwmon5/Makefile index 06ef7f9..2a93571 100644 --- a/board/lwmon5/Makefile +++ b/board/lwmon5/Makefile @@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(BOARD).a -COBJS = $(BOARD).o sdram.o +COBJS = $(BOARD).o kbd.o sdram.o SOBJS = init.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) 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 diff --git a/board/lwmon5/lwmon5.c b/board/lwmon5/lwmon5.c index 830ec19..77f9989 100644 --- a/board/lwmon5/lwmon5.c +++ b/board/lwmon5/lwmon5.c @@ -19,6 +19,7 @@ */ #include <common.h> +#include <command.h> #include <ppc440.h> #include <asm/processor.h> #include <asm/gpio.h> @@ -28,7 +29,8 @@ DECLARE_GLOBAL_DATA_PTR; extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ -ulong flash_get_size (ulong base, int banknum); +ulong flash_get_size(ulong base, int banknum); +int misc_init_r_kbd(void); int board_early_init_f(void) { @@ -295,6 +297,11 @@ int misc_init_r(void) out_be32((void *)0xc4000024, 0x64); out_be32((void *)0xc4000020, 0x701); + /* + * Init matrix keyboard + */ + misc_init_r_kbd(); + return 0; } @@ -522,13 +529,28 @@ void hw_watchdog_reset(void) gpio_write_bit(CFG_GPIO_WATCHDOG, val); } -#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) +int do_eeprom_wp(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { - return (ctrlc()); + if (argc < 2) { + printf("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + if ((strcmp(argv[1], "on") == 0)) { + gpio_write_bit(CFG_GPIO_EEPROM_EXT_WP, 1); + } else if ((strcmp(argv[1], "off") == 0)) { + gpio_write_bit(CFG_GPIO_EEPROM_EXT_WP, 0); + } else { + printf("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + + return 0; } -#endif + +U_BOOT_CMD( + eepromwp, 2, 0, do_eeprom_wp, + "eepromwp- eeprom write protect off/on\n", + "<on|off> - enable (on) or disable (off) I2C EEPROM write protect\n" +); |