Add support for UC100 board

1 files changed, 268 insertions, 0 deletions

diff --git a/board/uc100/uc100.c b/board/uc100/uc100.c
new file mode 100644
index 0000000..5597790
--- /dev/null
+++ b/board/uc100/uc100.c
@@ -0,0 +1,268 @@
+/*
+ * (C) Copyright 2000-2004
+ * 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
+ */
+
+#if 0
+#define DEBUG
+#endif
+
+#include <common.h>
+#include <mpc8xx.h>
+#include <i2c.h>
+
+
+/*********************************************************************/
+/* UPMA Pre Initilization Table by WV (Miron MT48LC16M16A2-7E B)     */
+/*********************************************************************/
+const uint sdram_init_upm_table[] = {
+	/* SDRAM Initialisation Sequence (offset 0 in UPMA RAM) WV */
+	/* NOP    - Precharge - AutoRefr  - NOP       - NOP        */
+	/* NOP    - AutoRefr  - NOP                                */
+	/* NOP    - NOP       - LoadModeR - NOP       - Active     */
+	/* Position of Single Read                                 */
+	0x0ffffc04, 0x0ff77c04, 0x0ff5fc04, 0x0ffffc04, 0x0ffffc04,
+	0x0ffffc04, 0x0ff5fc04, 0x0ffffc04,
+
+	/* Burst Read. (offset 8 in UPMA RAM)     */
+	/* Cycle lent for Initialisation WV */
+	0x0ffffc04, 0x0ffffc34, 0x0f057c34, 0x0ffffc30, 0x1ff7fc05,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Single Write. (offset 18 in UPMA RAM) */
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Burst Write. (offset 20 in UPMA RAM) */
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Refresh  (offset 30 in UPMA RAM) */
+	0x0FF77C04, 0x0FFFFC04, 0x0FF5FC84, 0x0FFFFC04, 0x0FFFFC04,
+	0x0FFFFC84, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Exception. (offset 3c in UPMA RAM) */
+	0x7FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+};
+
+/*********************************************************************/
+/* UPMA initilization table.                                         */
+/*********************************************************************/
+const uint sdram_upm_table[] = {
+	/* single read. (offset 0 in UPMA RAM) */
+	0x0F07FC04, 0x0FFFFC04, 0x00BDFC04, 0x0FF77C00, 0x1FFFFC05,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,     /* 0x05-0x07 new WV */
+
+	/* Burst Read. (offset 8 in UPMA RAM) */
+	0x0F07FC04, 0x0FFFFC04, 0x00BDFC04, 0x00FFFC00, 0x00FFFC00,
+	0x00FFFC00, 0x0FF77C00, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Single Write. (offset 18 in UPMA RAM) */
+	0x0F07FC04, 0x0FFFFC00, 0x00BD7C04, 0x0FFFFC04, 0x0FF77C04,
+	0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Burst Write. (offset 20 in UPMA RAM) */
+	0x0F07FC04, 0x0FFFFC00, 0x00BD7C00, 0x00FFFC00, 0x00FFFC00,
+	0x00FFFC04, 0x0FFFFC04, 0x0FF77C04, 0x1FFFFC05, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Refresh  (offset 30 in UPMA RAM) */
+	0x0FF77C04, 0x0FFFFC04, 0x0FF5FC84, 0x0FFFFC04, 0x0FFFFC04,
+	0x0FFFFC84, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Exception. (offset 3c in UPMA RAM) */
+	0x7FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, /* 0x3C new WV */
+};
+
+/*********************************************************************/
+/* UPMB initilization table.                                         */
+/*********************************************************************/
+const uint mpm_upm_table[] = {
+	/*  single read. (offset 0 in upm RAM) */
+	0x8FF00004, 0x0FF00004, 0x0FF81004, 0x1FF00001,
+	0x1FF00001, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* burst read. (Offset 8 in upm RAM)   */
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* single write. (Offset 0x18 in upm RAM) */
+	0x8FF00004, 0x0FF00004, 0x0FF81004, 0x0FF00004,
+	0x0FF00004, 0x1FF00001, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/*  burst write. (Offset 0x20 in upm RAM) */
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Refresh cycle, offset 0x30 */
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+
+	/* Exception, 0ffset 0x3C */
+	0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
+};
+
+
+int board_switch(void)
+{
+	volatile pcmconf8xx_t	*pcmp;
+
+	pcmp  = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
+
+	return ((pcmp->pcmc_pipr >> 24) & 0xf);
+}
+
+
+/*
+ * Check Board Identity:
+ */
+int checkboard (void)
+{
+	unsigned char str[64];
+	int i = getenv_r ("serial#", str, sizeof(str));
+
+	puts ("Board: ");
+
+	if (i == -1) {
+		puts ("### No HW ID - assuming UC100");
+	} else {
+		puts(str);
+	}
+
+	printf (" (SWITCH=%1X)\n", board_switch());
+
+	return 0;
+}
+
+
+/*
+ * Initialize SDRAM
+ */
+long int initdram (int board_type)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+	/*---------------------------------------------------------------------*/
+	/* Initialize the UPMA/UPMB registers with the appropriate table.      */
+	/*---------------------------------------------------------------------*/
+	upmconfig (UPMA, (uint *) sdram_init_upm_table,
+		   sizeof (sdram_init_upm_table) / sizeof (uint));
+	upmconfig (UPMB, (uint *) mpm_upm_table,
+		   sizeof (mpm_upm_table) / sizeof (uint));
+
+	/*---------------------------------------------------------------------*/
+	/* Memory Periodic Timer Prescaler: divide by 16                       */
+	/*---------------------------------------------------------------------*/
+	memctl->memc_mptpr = 0x0200; /* Divide by 32 WV */
+
+	memctl->memc_mamr = CFG_MAMR_VAL & 0xFF7FFFFF; /* Bit 8 := "0" Kein Refresh WV */
+   	memctl->memc_mbmr = CFG_MBMR_VAL;
+
+	/*---------------------------------------------------------------------*/
+	/* Initialize the Memory Controller registers, MPTPR, Chip Select 1    */
+	/* for SDRAM                                                           */
+	/*                                                                     */
+	/* NOTE: The refresh rate in MAMR reg is set according to the lowest   */
+	/*       clock rate (16.67MHz) to allow proper operation for all ADS   */
+	/*       clock frequencies.                                            */
+	/*---------------------------------------------------------------------*/
+	memctl->memc_or1 = CFG_OR1_PRELIM;
+	memctl->memc_br1 = CFG_BR1_PRELIM;
+
+	/*-------------------------------------------------------------------*/
+	/* Wait at least 200 usec for DRAM to stabilize, this magic number   */
+	/* obtained from the init code.                                      */
+	/*-------------------------------------------------------------------*/
+	udelay(200);
+
+	memctl->memc_mamr = (memctl->memc_mamr | 0x04) & ~0x08;
+
+	memctl->memc_br1 = CFG_BR1_PRELIM;
+	memctl->memc_or1 = CFG_OR1_PRELIM;
+
+	/*---------------------------------------------------------------------*/
+	/* run MRS command in location 5-8 of UPMB.                            */
+	/*---------------------------------------------------------------------*/
+	memctl->memc_mar = 0x88;
+	/* RUN UPMA on CS1 1-time from UPMA addr 0x05 */
+
+	memctl->memc_mcr = 0x80002100;
+	/* RUN UPMA on CS1 1-time from UPMA addr 0x00 WV */
+
+	udelay(200);
+
+	/*---------------------------------------------------------------------*/
+	/* Initialisation for normal access WV                                 */
+	/*---------------------------------------------------------------------*/
+
+	/*---------------------------------------------------------------------*/
+	/* Initialize the UPMA register with the appropriate table.            */
+	/*---------------------------------------------------------------------*/
+	upmconfig (UPMA, (uint *) sdram_upm_table,
+		   sizeof (sdram_upm_table) / sizeof (uint));
+
+	/*---------------------------------------------------------------------*/
+	/* rerstore MBMR value (4-beat refresh burst.)                         */
+	/*---------------------------------------------------------------------*/
+	memctl->memc_mamr = CFG_MAMR_VAL | 0x00800000; /* Bit 8 := "1" Refresh Enable WV */
+
+	udelay(200);
+
+	return (64 * 1024 * 1024); /* fixed setup for 64MBytes! */
+}
+
+
+int misc_init_r (void)
+{
+	uchar val;
+
+	/*
+	 * Make sure that RTC has clock output enabled (triggers watchdog!)
+	 */
+	val = i2c_reg_read (CFG_I2C_RTC_ADDR, 0x0D);
+	val |= 0x80;
+	i2c_reg_write (CFG_I2C_RTC_ADDR, 0x0D, val);
+
+	return 0;
+}
+
+
+#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)
+{
+	return 0;		/* No hotkeys supported */
+}
+#endif