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+/***********************************************************************
+ *
+M* Modul: lwmon.c
+M*
+M* Content: LWMON specific U-Boot commands.
+ *
+ * (C) Copyright 2001, 2002
+ * DENX Software Engineering
+ * Wolfgang Denk, wd@denx.de
+ * All rights reserved.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ ***********************************************************************/
+
+/*---------------------------- Headerfiles ----------------------------*/
+#include <common.h>
+#include <mpc8xx.h>
+#include <commproc.h>
+#include <i2c.h>
+#include <command.h>
+#include <cmd_bsp.h>
+#include <malloc.h>
+#include <post.h>
+
+#include <linux/types.h>
+#include <linux/string.h> /* for strdup */
+
+/*------------------------ Local prototypes ---------------------------*/
+static long int dram_size (long int, long int *, long int);
+
+
+/*--------------------- Local macros and constants --------------------*/
+#define _NOT_USED_ 0xFFFFFFFF
+
+/*
+ * 66 MHz SDRAM access using UPM A
+ */
+const uint sdram_table[] =
+{
+#if defined(CFG_MEMORY_75) || defined(CFG_MEMORY_8E)
+ /*
+ * Single Read. (Offset 0 in UPM RAM)
+ */
+ 0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBAFC00,
+ 0x1FF5FC47, /* last */
+ /*
+ * SDRAM Initialization (offset 5 in UPM RAM)
+ *
+ * This is no UPM entry point. The following definition uses
+ * the remaining space to establish an initialization
+ * sequence, which is executed by a RUN command.
+ *
+ */
+ 0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
+ /*
+ * Burst Read. (Offset 8 in UPM RAM)
+ */
+ 0x1F0DFC04, 0xEEAFBC04, 0x10AF7C04, 0xF0AFFC00,
+ 0xF0AFFC00, 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Single Write. (Offset 18 in UPM RAM)
+ */
+ 0x1F2DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Burst Write. (Offset 20 in UPM RAM)
+ */
+ 0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
+ 0xF0AFFC00, 0xE1BAFC04, 0x01FF5FC47, /* last */
+ _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Refresh (Offset 30 in UPM RAM)
+ */
+ 0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+ 0xFFFFFC84, 0xFFFFFC07, /* last */
+ _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Exception. (Offset 3c in UPM RAM)
+ */
+ 0x7FFFFC07, /* last */
+ 0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
+#endif
+#ifdef CFG_MEMORY_7E
+ /*
+ * Single Read. (Offset 0 in UPM RAM)
+ */
+ 0x0E2DBC04, 0x11AF7C04, 0xEFBAFC00, 0x1FF5FC47, /* last */
+ _NOT_USED_,
+ /*
+ * SDRAM Initialization (offset 5 in UPM RAM)
+ *
+ * This is no UPM entry point. The following definition uses
+ * the remaining space to establish an initialization
+ * sequence, which is executed by a RUN command.
+ *
+ */
+ 0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
+ /*
+ * Burst Read. (Offset 8 in UPM RAM)
+ */
+ 0x0E2DBC04, 0x10AF7C04, 0xF0AFFC00, 0xF0AFFC00,
+ 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
+ _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Single Write. (Offset 18 in UPM RAM)
+ */
+ 0x0E29BC04, 0x01B27C04, 0x1FF5FC47, /* last */
+ _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Burst Write. (Offset 20 in UPM RAM)
+ */
+ 0x0E29BC04, 0x10A77C00, 0xF0AFFC00, 0xF0AFFC00,
+ 0xE1BAFC04, 0x1FF5FC47, /* last */
+ _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Refresh (Offset 30 in UPM RAM)
+ */
+ 0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+ 0xFFFFFC84, 0xFFFFFC07, /* last */
+ _NOT_USED_, _NOT_USED_,
+ _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ /*
+ * Exception. (Offset 3c in UPM RAM)
+ */
+ 0x7FFFFC07, /* last */
+ 0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
+#endif
+};
+
+/*
+ * Check Board Identity:
+ *
+ */
+
+/***********************************************************************
+F* Function: int checkboard (void) P*A*Z*
+ *
+P* Parameters: none
+P*
+P* Returnvalue: int - 0 is always returned
+ *
+Z* Intention: This function is the checkboard() method implementation
+Z* for the lwmon board. Only a standard message is printed.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+int checkboard (void)
+{
+ puts ("Board: Litronic Monitor IV\n");
+ return (0);
+}
+
+/***********************************************************************
+F* Function: long int initdram (int board_type) P*A*Z*
+ *
+P* Parameters: int board_type
+P* - Usually type of the board - ignored here.
+P*
+P* Returnvalue: long int
+P* - Size of initialized memory
+ *
+Z* Intention: This function is the initdram() method implementation
+Z* for the lwmon board.
+Z* The memory controller is initialized to access the
+Z* DRAM.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+long int initdram (int board_type)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immr->im_memctl;
+ long int size_b0;
+ long int size8, size9;
+ int i;
+
+ /*
+ * Configure UPMA for SDRAM
+ */
+ upmconfig (UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
+
+ memctl->memc_mptpr = CFG_MPTPR;
+
+ /* burst length=4, burst type=sequential, CAS latency=2 */
+ memctl->memc_mar = CFG_MAR;
+
+ /*
+ * Map controller bank 3 to the SDRAM bank at preliminary address.
+ */
+ memctl->memc_or3 = CFG_OR3_PRELIM;
+ memctl->memc_br3 = CFG_BR3_PRELIM;
+
+ /* initialize memory address register */
+ memctl->memc_mamr = CFG_MAMR_8COL; /* refresh not enabled yet */
+
+ /* mode initialization (offset 5) */
+ udelay (200); /* 0x80006105 */
+ memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x05);
+
+ /* run 2 refresh sequence with 4-beat refresh burst (offset 0x30) */
+ udelay (1); /* 0x80006130 */
+ memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
+ udelay (1); /* 0x80006130 */
+ memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
+
+ udelay (1); /* 0x80006106 */
+ memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x06);
+
+ memctl->memc_mamr |= MAMR_PTBE; /* refresh enabled */
+
+ udelay (200);
+
+ /* Need at least 10 DRAM accesses to stabilize */
+ for (i = 0; i < 10; ++i) {
+ volatile unsigned long *addr =
+ (volatile unsigned long *) SDRAM_BASE3_PRELIM;
+ unsigned long val;
+
+ val = *(addr + i);
+ *(addr + i) = val;
+ }
+
+ /*
+ * Check Bank 0 Memory Size for re-configuration
+ *
+ * try 8 column mode
+ */
+ size8 = dram_size (CFG_MAMR_8COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
+
+ udelay (1000);
+
+ /*
+ * try 9 column mode
+ */
+ size9 = dram_size (CFG_MAMR_9COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
+
+ if (size8 < size9) { /* leave configuration at 9 columns */
+ size_b0 = size9;
+ memctl->memc_mamr = CFG_MAMR_9COL | MAMR_PTBE;
+ udelay (500);
+ } else { /* back to 8 columns */
+ size_b0 = size8;
+ memctl->memc_mamr = CFG_MAMR_8COL | MAMR_PTBE;
+ udelay (500);
+ }
+
+ /*
+ * Final mapping:
+ */
+
+ memctl->memc_or3 = ((-size_b0) & 0xFFFF0000) |
+ OR_CSNT_SAM | OR_G5LS | SDRAM_TIMING;
+ memctl->memc_br3 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+ udelay (1000);
+
+ return (size_b0);
+}
+
+/***********************************************************************
+F* Function: static long int dram_size (long int mamr_value,
+F* long int *base,
+F* long int maxsize) P*A*Z*
+ *
+P* Parameters: long int mamr_value
+P* - Value for MAMR for the test
+P* long int *base
+P* - Base address for the test
+P* long int maxsize
+P* - Maximum size to test for
+P*
+P* Returnvalue: long int
+P* - Size of probed memory
+ *
+Z* Intention: Check memory range for valid RAM. A simple memory test
+Z* determines the actually available RAM size between
+Z* addresses `base' and `base + maxsize'. Some (not all)
+Z* hardware errors are detected:
+Z* - short between address lines
+Z* - short between data lines
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+static long int dram_size (long int mamr_value, long int *base, long int maxsize)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immr->im_memctl;
+ volatile long int *addr;
+ ulong cnt, val;
+ ulong save[32]; /* to make test non-destructive */
+ unsigned char i = 0;
+
+ memctl->memc_mamr = mamr_value;
+
+ for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) {
+ addr = base + cnt; /* pointer arith! */
+
+ save[i++] = *addr;
+ *addr = ~cnt;
+ }
+
+ /* write 0 to base address */
+ addr = base;
+ save[i] = *addr;
+ *addr = 0;
+
+ /* check at base address */
+ if ((val = *addr) != 0) {
+ *addr = save[i];
+ return (0);
+ }
+
+ for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
+ addr = base + cnt; /* pointer arith! */
+
+ val = *addr;
+ *addr = save[--i];
+
+ if (val != (~cnt)) {
+ return (cnt * sizeof (long));
+ }
+ }
+ return (maxsize);
+}
+
+/* ------------------------------------------------------------------------- */
+
+#ifndef PB_ENET_TENA
+# define PB_ENET_TENA ((uint)0x00002000) /* PB 18 */
+#endif
+
+/***********************************************************************
+F* Function: int board_pre_init (void) P*A*Z*
+ *
+P* Parameters: none
+P*
+P* Returnvalue: int
+P* - 0 is always returned.
+ *
+Z* Intention: This function is the board_pre_init() method implementation
+Z* for the lwmon board.
+Z* Disable Ethernet TENA on Port B.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+int board_pre_init (void)
+{
+ volatile immap_t *immr = (immap_t *) CFG_IMMR;
+
+ /* Disable Ethernet TENA on Port B
+ * Necessary because of pull up in COM3 port.
+ *
+ * This is just a preliminary fix, intended to turn off TENA
+ * as soon as possible to avoid noise on the network. Once
+ * I²C is running we will make sure the interface is
+ * correctly initialized.
+ */
+ immr->im_cpm.cp_pbpar &= ~PB_ENET_TENA;
+ immr->im_cpm.cp_pbodr &= ~PB_ENET_TENA;
+ immr->im_cpm.cp_pbdat &= ~PB_ENET_TENA; /* set to 0 = disabled */
+ immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
+ return (0);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/***********************************************************************
+F* Function: void reset_phy (void) P*A*Z*
+ *
+P* Parameters: none
+P*
+P* Returnvalue: none
+ *
+Z* Intention: Reset the PHY. In the lwmon case we do this by the
+Z* signaling the PIC I/O expander.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+void reset_phy (void)
+{
+ uchar c;
+
+#ifdef DEBUG
+ printf ("### Switch on Ethernet for SCC2 ###\n");
+#endif
+ c = pic_read (0x61);
+#ifdef DEBUG
+ printf ("Old PIC read: reg_61 = 0x%02x\n", c);
+#endif
+ c |= 0x40; /* disable COM3 */
+ c &= ~0x80; /* enable Ethernet */
+ pic_write (0x61, c);
+#ifdef DEBUG
+ c = pic_read (0x61);
+ printf ("New PIC read: reg_61 = 0x%02x\n", c);
+#endif
+ udelay (1000);
+}
+
+
+/*------------------------- 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 */
+#define KEYBD_DATALEN 9 /* 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 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 (void)
+{
+ uchar kbd_data[KEYBD_DATALEN];
+ uchar tmp_data[KEYBD_DATALEN];
+ uchar keybd_env[2 * KEYBD_DATALEN + 1];
+ uchar val, errcd;
+ uchar *str;
+ int i;
+
+ i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+ /* 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) {
+ printf ("KEYBD: Error %02X\n", errcd);
+ }
+ /* 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 */
+ printf ("*** Keyboard error code %02X ***\n", val);
+ sprintf (keybd_env, "%02X", val);
+ 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.
+ *
+ * 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);
+ }
+
+ for (i = 0; i < KEYBD_DATALEN; ++i) {
+ sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
+ }
+ setenv ("keybd", keybd_env);
+
+ str = strdup (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";
+
+/***********************************************************************
+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)
+{
+ uchar compare[KEYBD_DATALEN-1];
+ uchar magic[sizeof (kbd_magic_prefix) + 1];
+ uchar extra;
+ uchar *str, *nxt, *suffix;
+ uchar *kbd_magic_keys;
+ int i;
+
+ /*
+ * 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=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix) {
+ sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
+#if 0
+ printf ("### Check magic \"%s\"\n", magic);
+#endif
+ /* Don't include modifier byte */
+ memcpy (compare, kbd_data+1, KEYBD_DATALEN-1);
+
+ extra = 0;
+
+ for (str= getenv(magic); str != NULL; str = (*nxt) ? nxt+1 : nxt) {
+ uchar c;
+ int k;
+
+ c = (uchar) simple_strtoul (str, (char **) (&nxt), 16);
+
+ if (str == 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)) {
+ extra = 1; /* unmatched key */
+ }
+ }
+
+ /*
+ * A full match leaves no keys in the `compare' array,
+ * and has no extra keys
+ */
+
+ for (i = 0; i < sizeof(compare); ++i) {
+ if (compare[i])
+ break;
+ }
+
+ if ((i == sizeof(compare)) && (extra == 0)) {
+ uchar 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 (cmd);
+ }
+ }
+#if 0
+ printf ("### Delete PREBOOT\n");
+#endif
+ *kbd_data = '\0';
+ return (NULL);
+}
+#endif /* CONFIG_PREBOOT */
+
+/*---------------Board Special Commands: PIC read/write ---------------*/
+
+#if (CONFIG_COMMANDS & CFG_CMD_BSP)
+/***********************************************************************
+F* Function: int do_pic (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 The command was handled successfully
+P* 1 An error occurred
+ *
+Z* Intention: Implement the "pic [read|write]" commands.
+Z* The read subcommand takes one argument, the register,
+Z* whereas the write command takes two, the register and
+Z* the new value.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+int do_pic (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ uchar reg, val;
+
+ switch (argc) {
+ case 3: /* PIC read reg */
+ if (strcmp (argv[1], "read") != 0)
+ break;
+
+ reg = simple_strtoul (argv[2], NULL, 16);
+
+ printf ("PIC read: reg %02x: %02x\n\n", reg, pic_read (reg));
+
+ return 0;
+ case 4: /* PIC write reg val */
+ if (strcmp (argv[1], "write") != 0)
+ break;
+
+ reg = simple_strtoul (argv[2], NULL, 16);
+ val = simple_strtoul (argv[3], NULL, 16);
+
+ printf ("PIC write: reg %02x val 0x%02x: %02x => ",
+ reg, val, pic_read (reg));
+ pic_write (reg, val);
+ printf ("%02x\n\n", pic_read (reg));
+ return 0;
+ default:
+ break;
+ }
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+}
+
+/***********************************************************************
+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];
+ uchar keybd_env[2 * KEYBD_DATALEN + 1];
+ uchar val;
+ int i;
+
+ i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+ /* 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;
+}
+
+/* Read and set LSB switch */
+#define CFG_PC_TXD1_ENA 0x0008
+
+/***********************************************************************
+F* Function: int do_lsb (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 The command was handled successfully
+P* 1 An error occurred
+ *
+Z* Intention: Implement the "lsb [on|off]" commands.
+Z* The lsb is switched according to the first parameter by
+Z* by signaling the PIC I/O expander.
+Z* Called with no arguments, the current setting is
+Z* printed.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+int do_lsb (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ uchar val;
+ immap_t *immr = (immap_t *) CFG_IMMR;
+
+ switch (argc) {
+ case 1: /* lsb - print setting */
+ val = pic_read (0x60);
+ printf ("LSB is o%s\n", (val & 0x20) ? "n" : "ff");
+ return 0;
+ case 2: /* lsb on or lsb off - set switch */
+ val = pic_read (0x60);
+
+ if (strcmp (argv[1], "on") == 0) {
+ val |= 0x20;
+ immr->im_ioport.iop_pcpar &= ~(CFG_PC_TXD1_ENA);
+ immr->im_ioport.iop_pcdat |= CFG_PC_TXD1_ENA;
+ immr->im_ioport.iop_pcdir |= CFG_PC_TXD1_ENA;
+ } else if (strcmp (argv[1], "off") == 0) {
+ val &= ~0x20;
+ immr->im_ioport.iop_pcpar &= ~(CFG_PC_TXD1_ENA);
+ immr->im_ioport.iop_pcdat &= ~(CFG_PC_TXD1_ENA);
+ immr->im_ioport.iop_pcdir |= CFG_PC_TXD1_ENA;
+ } else {
+ break;
+ }
+ pic_write (0x60, val);
+ return 0;
+ default:
+ break;
+ }
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+}
+
+#endif /* CFG_CMD_BSP */
+
+/*----------------------------- Utilities -----------------------------*/
+/***********************************************************************
+F* Function: uchar pic_read (uchar reg) P*A*Z*
+ *
+P* Parameters: uchar reg
+P* - Register to read
+P*
+P* Returnvalue: uchar
+P* - Value read from register
+ *
+Z* Intention: Read a register from the PIC I/O expander.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+uchar pic_read (uchar reg)
+{
+ return (i2c_reg_read (CFG_I2C_PICIO_ADDR, reg));
+}
+
+/***********************************************************************
+F* Function: void pic_write (uchar reg, uchar val) P*A*Z*
+ *
+P* Parameters: uchar reg
+P* - Register to read
+P* uchar val
+P* - Value to write
+P*
+P* Returnvalue: none
+ *
+Z* Intention: Write to a register on the PIC I/O expander.
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+void pic_write (uchar reg, uchar val)
+{
+ i2c_reg_write (CFG_I2C_PICIO_ADDR, reg, val);
+}
+
+/*---------------------- Board Control Functions ----------------------*/
+/***********************************************************************
+F* Function: void board_poweroff (void) P*A*Z*
+ *
+P* Parameters: none
+P*
+P* Returnvalue: none
+ *
+Z* Intention: Turn off the battery power and loop endless, so this
+Z* should better be the last function you call...
+ *
+D* Design: wd@denx.de
+C* Coding: wd@denx.de
+V* Verification: dzu@denx.de
+ ***********************************************************************/
+void board_poweroff (void)
+{
+ /* Turn battery off */
+ ((volatile immap_t *)CFG_IMMR)->im_ioport.iop_pcdat &= ~(1 << (31 - 13));
+
+ while (1);
+}
generated by cgit v1.1 at 2024-11-22 22:43:20 +0000