Initial revision

1 files changed, 440 insertions, 0 deletions

diff --git a/board/siemens/CCM/ccm.c b/board/siemens/CCM/ccm.c
new file mode 100644
index 0000000..079f38f
--- /dev/null
+++ b/board/siemens/CCM/ccm.c
@@ -0,0 +1,440 @@
+/*
+ * (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 <mpc8xx.h>
+#include <commproc.h>
+#include <command.h>
+
+/* ------------------------------------------------------------------------- */
+
+static long int dram_size (long int, long int *, long int);
+void can_driver_enable (void);
+void can_driver_disable (void);
+
+int fpga_init(void);
+
+/* ------------------------------------------------------------------------- */
+
+#define	_NOT_USED_	0xFFFFFFFF
+
+const uint sdram_table[] =
+{
+	/*
+	 * Single Read. (Offset 0 in UPMA RAM)
+	 */
+	0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBAFC00,
+	0x1FF5FC47, /* last */
+	/*
+	 * SDRAM Initialization (offset 5 in UPMA 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 UPMA 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 UPMA RAM)
+	 */
+	0x1F0DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Burst Write. (Offset 20 in UPMA RAM)
+	 */
+	0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
+	0xF0AFFC00, 0xE1BAFC04, 0x1FF5FC47, /* last */
+					    _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Refresh  (Offset 30 in UPMA RAM)
+	 */
+	0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
+	0xFFFFFC84, 0xFFFFFC07, /* last */
+				_NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/*
+	 * Exception. (Offset 3c in UPMA RAM)
+	 */
+	0x7FFFFC07, /* last */
+		    _NOT_USED_, _NOT_USED_, _NOT_USED_,
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ *
+ * Always return 1 (no second DRAM bank since based on TQM8xxL module)
+ */
+
+int checkboard (void)
+{
+    unsigned char *s;
+    unsigned char buf[64];
+
+    s = (getenv_r ("serial#", buf, sizeof(buf)) > 0) ? buf : NULL;
+
+    puts ("Board: Siemens CCM");
+
+    if (s) {
+	    puts (" (");
+
+	    for (; *s; ++s) {
+		if (*s == ' ')
+		    break;
+		putc (*s);
+	    }
+	    putc (')');
+    }
+
+    putc ('\n');
+
+    return (0);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * If Power-On-Reset switch off the Red and Green LED: At reset, the
+ * data direction registers are cleared and must therefore be restored.
+ */
+#define RSR_CSRS	0x08000000
+
+int power_on_reset(void)
+{
+    /* Test Reset Status Register */
+    return ((volatile immap_t *)CFG_IMMR)->im_clkrst.car_rsr & RSR_CSRS ? 0:1;
+}
+
+#define PB_LED_GREEN	0x10000		/* red LED is on PB.15 */
+#define PB_LED_RED	0x20000		/* red LED is on PB.14 */
+#define PB_LEDS		(PB_LED_GREEN | PB_LED_RED);
+
+static void init_leds (void)
+{
+    volatile immap_t *immap  = (immap_t *)CFG_IMMR;
+
+    immap->im_cpm.cp_pbpar &= ~PB_LEDS;
+    immap->im_cpm.cp_pbodr &= ~PB_LEDS;
+    immap->im_cpm.cp_pbdir |=  PB_LEDS;
+    /* Check stop reset status */
+    if (power_on_reset()) {
+	    immap->im_cpm.cp_pbdat &= ~PB_LEDS;
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
+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 = 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 banks 2 and 3 to the SDRAM banks 2 and 3 at
+     * preliminary addresses - these have to be modified after the
+     * SDRAM size has been determined.
+     */
+    memctl->memc_or2 = CFG_OR2_PRELIM;
+    memctl->memc_br2 = CFG_BR2_PRELIM;
+
+    memctl->memc_mamr = CFG_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
+
+    udelay(200);
+
+    /* perform SDRAM initializsation sequence */
+
+    memctl->memc_mcr  = 0x80004105;	/* SDRAM bank 0 */
+    udelay(1);
+    memctl->memc_mcr  = 0x80004230;	/* SDRAM bank 0 - execute twice */
+    udelay(1);
+
+    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_BASE2_PRELIM, SDRAM_MAX_SIZE);
+
+    udelay (1000);
+
+    /*
+     * try 9 column mode
+     */
+    size9 = dram_size (CFG_MAMR_9COL, (ulong *)SDRAM_BASE2_PRELIM, SDRAM_MAX_SIZE);
+
+    if (size8 < size9) {		/* leave configuration at 9 columns	*/
+	size = size9;
+/*	debug ("SDRAM in 9 column mode: %ld MB\n", size >> 20);	*/
+    } else {				/* back to 8 columns			*/
+	size = size8;
+	memctl->memc_mamr = CFG_MAMR_8COL;
+	udelay(500);
+/*	debug ("SDRAM in 8 column mode: %ld MB\n", size >> 20);	*/
+    }
+
+    udelay (1000);
+
+    /*
+     * Adjust refresh rate depending on SDRAM type
+     * For types > 128 MBit leave it at the current (fast) rate
+     */
+    if (size < 0x02000000) {
+	/* reduce to 15.6 us (62.4 us / quad) */
+	memctl->memc_mptpr = CFG_MPTPR_2BK_4K;
+	udelay(1000);
+    }
+
+    /*
+     * Final mapping
+     */
+
+    memctl->memc_or2 = ((-size) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM;
+    memctl->memc_br2 = (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;
+
+    can_driver_enable ();
+    init_leds ();
+
+    udelay(10000);
+
+    return (size);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Warning - both the PUMA load mode and the CAN driver use UPM B,
+ * so make sure only one of both is active.
+ */
+void can_driver_enable (void)
+{
+    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+    volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+    /* Initialize MBMR */
+    memctl->memc_mbmr = MAMR_GPL_B4DIS;	/* GPL_B4 ouput line Disable */
+
+    /* Initialize UPMB for CAN: single read */
+    memctl->memc_mdr = 0xFFFFC004;
+    memctl->memc_mcr = 0x0100 | UPMB;
+
+    memctl->memc_mdr = 0x0FFFD004;
+    memctl->memc_mcr = 0x0101 | UPMB;
+
+    memctl->memc_mdr = 0x0FFFC000;
+    memctl->memc_mcr = 0x0102 | UPMB;
+
+    memctl->memc_mdr = 0x3FFFC004;
+    memctl->memc_mcr = 0x0103 | UPMB;
+
+    memctl->memc_mdr = 0xFFFFDC05;
+    memctl->memc_mcr = 0x0104 | UPMB;
+
+    /* Initialize UPMB for CAN: single write */
+    memctl->memc_mdr = 0xFFFCC004;
+    memctl->memc_mcr = 0x0118 | UPMB;
+
+    memctl->memc_mdr = 0xCFFCD004;
+    memctl->memc_mcr = 0x0119 | UPMB;
+
+    memctl->memc_mdr = 0x0FFCC000;
+    memctl->memc_mcr = 0x011A | UPMB;
+
+    memctl->memc_mdr = 0x7FFCC004;
+    memctl->memc_mcr = 0x011B | UPMB;
+
+    memctl->memc_mdr = 0xFFFDCC05;
+    memctl->memc_mcr = 0x011C | UPMB;
+
+    /* Initialize OR3 / BR3 for CAN Bus Controller */
+    memctl->memc_or3 = CFG_OR3_CAN;
+    memctl->memc_br3 = CFG_BR3_CAN;
+}
+
+void can_driver_disable (void)
+{
+    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+    volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+    /* Reset OR3 / BR3 to disable  CAN Bus Controller */
+    memctl->memc_br3 = 0;
+    memctl->memc_or3 = 0;
+
+    memctl->memc_mbmr = 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * 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);
+}
+
+/* ------------------------------------------------------------------------- */
+
+#define	ETH_CFG_BITS	(CFG_PB_ETH_CFG1 | CFG_PB_ETH_CFG2  | CFG_PB_ETH_CFG3 )
+
+#define ETH_ALL_BITS	(ETH_CFG_BITS | CFG_PB_ETH_POWERDOWN)
+
+void	reset_phy(void)
+{
+	immap_t *immr = (immap_t *)CFG_IMMR;
+	ulong value;
+
+	/* Configure all needed port pins for GPIO */
+#if CFG_ETH_MDDIS_VALUE
+	immr->im_ioport.iop_padat |=   CFG_PA_ETH_MDDIS;
+#else
+	immr->im_ioport.iop_padat &= ~(CFG_PA_ETH_MDDIS | CFG_PA_ETH_RESET);	/* Set low */
+#endif
+	immr->im_ioport.iop_papar &= ~(CFG_PA_ETH_MDDIS | CFG_PA_ETH_RESET);	/* GPIO */
+	immr->im_ioport.iop_paodr &= ~(CFG_PA_ETH_MDDIS | CFG_PA_ETH_RESET);	/* active output */
+	immr->im_ioport.iop_padir |=   CFG_PA_ETH_MDDIS | CFG_PA_ETH_RESET;	/* output */
+
+	immr->im_cpm.cp_pbpar &= ~(ETH_ALL_BITS);	/* GPIO */
+	immr->im_cpm.cp_pbodr &= ~(ETH_ALL_BITS);	/* active output */
+
+	value  = immr->im_cpm.cp_pbdat;
+
+	/* Assert Powerdown and Reset signals */
+	value |=  CFG_PB_ETH_POWERDOWN;
+
+	/* PHY configuration includes MDDIS and CFG1 ... CFG3 */
+#if CFG_ETH_CFG1_VALUE
+	value |=   CFG_PB_ETH_CFG1;
+#else
+	value &= ~(CFG_PB_ETH_CFG1);
+#endif
+#if CFG_ETH_CFG2_VALUE
+	value |=   CFG_PB_ETH_CFG2;
+#else
+	value &= ~(CFG_PB_ETH_CFG2);
+#endif
+#if CFG_ETH_CFG3_VALUE
+	value |=   CFG_PB_ETH_CFG3;
+#else
+	value &= ~(CFG_PB_ETH_CFG3);
+#endif
+
+	/* Drive output signals to initial state */
+	immr->im_cpm.cp_pbdat  = value;
+	immr->im_cpm.cp_pbdir |= ETH_ALL_BITS;
+	udelay (10000);
+
+	/* De-assert Ethernet Powerdown */
+	immr->im_cpm.cp_pbdat &= ~(CFG_PB_ETH_POWERDOWN); /* Enable PHY power */
+	udelay (10000);
+
+	/* de-assert RESET signal of PHY */
+	immr->im_ioport.iop_padat |= CFG_PA_ETH_RESET;
+	udelay (1000);
+}
+
+
+int misc_init_r (void)
+{
+	fpga_init();
+	return (0);
+}
+/* ------------------------------------------------------------------------- */