Initial revision

1 files changed, 423 insertions, 0 deletions

diff --git a/board/r360mpi/r360mpi.c b/board/r360mpi/r360mpi.c
new file mode 100644
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--- /dev/null
+++ b/board/r360mpi/r360mpi.c
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+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@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
+ */
+
+#include <common.h>
+#include <config.h>
+#include <mpc8xx.h>
+#include <i2c.h>
+
+#include <commproc.h>
+#include <command.h>
+#include <cmd_bsp.h>
+#include <malloc.h>
+
+#include <linux/types.h>
+#include <linux/string.h>       /* for strdup */
+
+
+/*
+ *  Memory Controller Using
+ *
+ *  CS0 - Flash memory            (0x40000000)
+ *  CS1 - SDRAM                   (0x00000000}
+ *  CS2 -
+ *  CS3 -
+ *  CS4 -
+ *  CS5 -
+ *  CS6 - PCMCIA device
+ *  CS7 - PCMCIA device
+ */
+
+/* ------------------------------------------------------------------------- */
+
+#define _not_used_	0xffffffff
+
+const uint sdram_table[]=
+{
+        /* single read. (offset 0 in upm RAM) */
+        0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
+        0x1ff77c47,
+
+        /* MRS initialization (offset 5) */
+
+        0x1ff77c34, 0xefeabc34, 0x1fb57c35,
+
+        /* burst read. (offset 8 in upm RAM) */
+        0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
+        0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47,
+        _not_used_, _not_used_, _not_used_, _not_used_,
+        _not_used_, _not_used_, _not_used_, _not_used_,
+
+        /* single write. (offset 18 in upm RAM) */
+        0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47,
+        _not_used_, _not_used_, _not_used_, _not_used_,
+
+        /* burst write. (offset 20 in upm RAM) */
+        0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
+        0xf0affc00, 0xe1bbbc04, 0x1ff77c47, _not_used_,
+        _not_used_, _not_used_, _not_used_, _not_used_,
+        _not_used_, _not_used_, _not_used_, _not_used_,
+
+        /* refresh. (offset 30 in upm RAM) */
+        0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
+        0xfffffc84, 0xfffffc07, _not_used_, _not_used_,
+        _not_used_, _not_used_, _not_used_, _not_used_,
+
+        /* exception. (offset 3c in upm RAM) */
+        0x7ffffc07, _not_used_, _not_used_, _not_used_ };
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+	puts ("Board: R360 MPI Board\n");
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static long int dram_size (long int, long int *, long int);
+
+/* ------------------------------------------------------------------------- */
+
+long int initdram (int board_type)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	long int size8, size9;
+	long int size_b0 = 0;
+	unsigned long reg;
+
+	upmconfig (UPMA, (uint *) sdram_table,
+			   sizeof (sdram_table) / sizeof (uint));
+
+	/*
+	 * Preliminary prescaler for refresh (depends on number of
+	 * banks): This value is selected for four cycles every 62.4 us
+	 * with two SDRAM banks or four cycles every 31.2 us with one
+	 * bank. It will be adjusted after memory sizing.
+	 */
+	memctl->memc_mptpr = CFG_MPTPR_2BK_8K;
+
+	memctl->memc_mar = 0x00000088;
+
+	/*
+	 * Map controller bank 1 to the SDRAM bank at
+	 * preliminary address - these have to be modified after the
+	 * SDRAM size has been determined.
+	 */
+	memctl->memc_or1 = CFG_OR1_PRELIM;
+	memctl->memc_br1 = CFG_BR1_PRELIM;
+
+	memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE));	/* no refresh yet */
+
+	udelay (200);
+
+	/* perform SDRAM initializsation sequence */
+
+	memctl->memc_mcr = 0x80002105;	/* SDRAM bank 0 */
+	udelay (200);
+	memctl->memc_mcr = 0x80002230;	/* SDRAM bank 0 - execute twice */
+	udelay (200);
+
+	memctl->memc_mamr |= MAMR_PTAE;	/* enable refresh */
+
+	udelay (1000);
+
+	/*
+	 * Check Bank 0 Memory Size for re-configuration
+	 *
+	 * try 8 column mode
+	 */
+	size8 = dram_size (CFG_MAMR_8COL, (ulong *) SDRAM_BASE1_PRELIM,
+					   SDRAM_MAX_SIZE);
+
+	udelay (1000);
+
+	/*
+	 * try 9 column mode
+	 */
+	size9 = dram_size (CFG_MAMR_9COL, (ulong *) SDRAM_BASE1_PRELIM,
+					   SDRAM_MAX_SIZE);
+
+	if (size8 < size9) {		/* leave configuration at 9 columns */
+		size_b0 = size9;
+/*	debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20);	*/
+	} else {					/* back to 8 columns            */
+		size_b0 = size8;
+		memctl->memc_mamr = CFG_MAMR_8COL;
+		udelay (500);
+/*	debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20);	*/
+	}
+
+	udelay (1000);
+
+	/*
+	 * Adjust refresh rate depending on SDRAM type, both banks
+	 * For types > 128 MBit leave it at the current (fast) rate
+	 */
+	if ((size_b0 < 0x02000000)) {
+		/* reduce to 15.6 us (62.4 us / quad) */
+		memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
+		udelay (1000);
+	}
+
+	/*
+	 * Final mapping
+	 */
+
+	memctl->memc_or1 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+	memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
+
+	/* adjust refresh rate depending on SDRAM type, one bank */
+	reg = memctl->memc_mptpr;
+	reg >>= 1;		/* reduce to CFG_MPTPR_1BK_8K / _4K */
+	memctl->memc_mptpr = reg;
+
+	udelay (10000);
+
+	return (size_b0);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check memory range for valid RAM. A simple memory test determines
+ * the actually available RAM size between addresses `base' and
+ * `base + maxsize'. Some (not all) hardware errors are detected:
+ * - short between address lines
+ * - short between data lines
+ */
+
+static long int dram_size (long int mamr_value, long int *base,
+						   long int maxsize)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->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);
+}
+
+/* ------------------------------------------------------------------------- */
+
+void r360_pwm_write (uchar reg, uchar val)
+{
+	if (i2c_write (CFG_I2C_PWM_ADDR, reg, 1, &val, 1)) {
+		printf ("Can't write PWM register 0x%02X.\n", reg);
+	}
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*-----------------------------------------------------------------------
+ * Keyboard Controller
+ */
+
+/* Number of bytes returned from Keyboard Controller */
+#define KEYBD_KEY_MAX		20				/* maximum key number */
+#define KEYBD_DATALEN		((KEYBD_KEY_MAX + 7) / 8)	/* normal key scan data */
+
+static uchar kbd_addr = CFG_I2C_KBD_ADDR;
+
+static uchar *key_match (uchar *);
+
+int misc_init_r (void)
+{
+	uchar kbd_data[KEYBD_DATALEN];
+	uchar keybd_env[2 * KEYBD_DATALEN + 1];
+	uchar *str;
+	int i;
+
+	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+	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 (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);
+	}
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * Check if pressed key(s) match magic sequence,
+ * and return the command string associated with that key(s).
+ *
+ * If no key press was decoded, NULL is returned.
+ *
+ * Note: the first character of the argument will be overwritten with
+ * the "magic charcter code" of the decoded key(s), or '\0'.
+ *
+ *
+ * Note: the string points to static environment data and must be
+ * saved before you call any function that modifies the environment.
+ */
+#ifdef CONFIG_PREBOOT
+
+static uchar kbd_magic_prefix[] = "key_magic";
+static uchar kbd_command_prefix[] = "key_cmd";
+
+static uchar *key_match (uchar * kbd_data)
+{
+	uchar compare[KEYBD_DATALEN];
+	uchar magic[sizeof (kbd_magic_prefix) + 1];
+	uchar cmd_name[sizeof (kbd_command_prefix) + 1];
+	uchar key_mask;
+	uchar *str, *nxt, *suffix;
+	uchar *kbd_magic_keys;
+	char *cmd;
+	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
+
+		memcpy(compare, kbd_data, KEYBD_DATALEN);
+
+		for (str = getenv(magic); str != NULL; str = (*nxt) ? nxt+1 : nxt) {
+			uchar c;
+
+			c = (uchar) simple_strtoul (str, (char **) (&nxt), 16);
+
+			if (str == nxt)				/* invalid character */
+				break;
+
+			if (c >= KEYBD_KEY_MAX)			/* bad key number */
+				goto next_magic;
+
+			key_mask = 0x80 >> (c % 8);
+
+			if (!(compare[c / 8] & key_mask))	/* key not pressed */
+				goto next_magic;
+
+			compare[c / 8] &= ~key_mask;
+		}
+
+		for (i=0; i<KEYBD_DATALEN; i++)
+			if (compare[i])			/* key(s) not released */
+				goto next_magic;
+
+		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);
+
+	next_magic:;
+	}
+#if 0
+	printf ("### Delete PREBOOT\n");
+#endif
+	*kbd_data = '\0';
+	return (NULL);
+}
+#endif							/* CONFIG_PREBOOT */
+
+/* Read Keyboard status */
+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];
+	int i;
+
+	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+
+	/* Read keys */
+	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;
+}