Add PPC4xx-HCU4 and HCU5 boards: HCU4 files

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+/*
+ *(C) Copyright 2005-2007 Netstal Maschinen AG
+ *    Niklaus Giger (Niklaus.Giger at netstal.com)
+ *
+ *    This source code is free software; you can redistribute it
+ *    and/or modify it in source code form 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  <ppc4xx.h>
+#include  <asm/processor.h>
+#include  <asm/io.h>
+#include  <asm-ppc/u-boot.h>
+#include  "../common/nm_bsp.c"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void sysLedSet(u32 value);
+long int spd_sdram(int(read_spd)(uint addr))
+#ifdef CONFIG_SPD_EEPROM
+	#define DEBUG
+#endif
+
+#if defined(DEBUG)
+void show_sdram_registers(void);
+#endif
+
+/*
+ * This function is run very early, out of flash, and before devices are
+ * initialized. It is called by lib_ppc/board.c:board_init_f by virtue
+ * of being in the init_sequence array.
+ *
+ * The SDRAM has been initialized already -- start.S:start called
+ * init.S:init_sdram early on -- but it is not yet being used for
+ * anything, not even stack. So be careful.
+ */
+
+#define CPC0_CR0	0xb1	/* Chip control register 0 */
+#define CPC0_CR1        0xb2	/* Chip control register 1 */
+/* Attention: If you want 1 microsecs times from the external oscillator
+ * use  0x00804051. But this causes problems with u-boot and linux!
+ */
+#define CPC0_CR1_VALUE	0x00004051
+#define CPC0_ECR	0xaa	/* Edge condition register */
+#define EBC0_CFG	0x23	/* External Peripheral Control Register */
+#define CPC0_EIRR	0xb6	/* External Interrupt Register */
+
+
+int board_early_init_f (void)
+{
+	/*-------------------------------------------------------------------+
+	| Interrupt controller setup for the HCU4 board.
+	| Note: IRQ 0-15  405GP internally generated; high; level sensitive
+	|       IRQ 16    405GP internally generated; low; level sensitive
+	|       IRQ 17-24 RESERVED/UNUSED
+	|       IRQ 31 (EXT IRQ 6) (unused)
+	+-------------------------------------------------------------------*/
+	mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
+	mtdcr (uicer, 0x00000000); /* disable all ints */
+	mtdcr (uiccr, 0x00000000); /* set all to be non-critical */
+	mtdcr (uicpr, 0xFFFFFF87); /* set int polarities */
+	mtdcr (uictr, 0x10000000); /* set int trigger levels */
+	mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
+
+	mtdcr(CPC0_CR1,  CPC0_CR1_VALUE);
+	mtdcr(CPC0_ECR,  0x60606000);
+	mtdcr(CPC0_EIRR, 0x7c000000);
+
+	return 0;
+}
+
+#ifdef CONFIG_BOARD_PRE_INIT
+int board_pre_init (void)
+{
+	return board_early_init_f ();
+}
+
+#endif
+
+enum {
+	/* HW_GENERATION_HCU wird nicht mehr unterstuetzt */
+	HW_GENERATION_HCU2  = 0x10,
+	HW_GENERATION_HCU3  = 0x10,
+	HW_GENERATION_HCU4  = 0x20,
+	HW_GENERATION_MCU   = 0x08,
+	HW_GENERATION_MCU20 = 0x0a,
+	HW_GENERATION_MCU25 = 0x09,
+};
+
+int checkboard (void)
+{
+#define HCU_MACH_VERSIONS_REGISTER ( 0x7C000000 + 0xF00000 )
+	unsigned j;
+	uint16_t *boardVersReg = (uint16_t *) HCU_MACH_VERSIONS_REGISTER;
+	uint16_t generation = *boardVersReg & 0xf0;
+	uint16_t index      = *boardVersReg & 0x0f;
+	/* Force /RTS to active. The board it not wired quite
+	   correctly to use cts/rtc flow control, so just force the
+	   /RST active and forget about it. */
+	writeb (readb (0xef600404) | 0x03, 0xef600404);
+	printf ("\nNetstal Maschinen AG ");
+	if (generation == HW_GENERATION_HCU3)
+		printf ("HCU3: index %d\n\n", index);
+	else if (generation == HW_GENERATION_HCU4)
+		printf ("HCU4: index %d\n\n", index);
+	/* GPIO here noch nicht richtig initialisert !!! */
+	sysLedSet(0);
+	for (j=0; j < 7;j++) {
+		sysLedSet(1 << j);
+		udelay(50*1000);
+	}
+	return 0;
+}
+
+u32 sysLedGet(void)
+{
+	return( ~( (*(u32 *)GPIO0_OR)) >> 23) & 0xff;
+}
+
+void sysLedSet(u32 value /* value to place in LEDs */)
+{
+	u32   tmp = ~value;
+	u32   *ledReg;
+	tmp  = (tmp << 23) | 0x7FFFFF;
+	ledReg = (u32   *)GPIO0_OR;
+	*ledReg = tmp;
+}
+
+/*
+ * sdram_init - Dummy implementation for start.S, spd_sdram  or initdram
+ *		used for HCUx
+ */
+void sdram_init(void)
+{
+	return;
+}
+
+#define mtsdram(reg, data)  { mtdcr(memcfga,reg);mtdcr(memcfgd,data); }
+#define mfsdram(value, reg) { mtdcr(memcfga,reg); value = mfdcr(memcfgd); }
+
+#if defined(DEBUG)
+void show_sdram_registers(void)
+{
+	u32 value;
+	printf ("SDRAM Controller Registers --\n");
+	mfsdram(value, mem_mcopt1);
+	printf ("    SDRAM0_CFG   : 0x%08x\n", value);
+	mfsdram(value, mem_status);
+	printf ("    SDRAM0_STATUS: 0x%08x\n", value);
+	mfsdram(value, mem_mb0cf);
+	printf ("    SDRAM0_B0CR  : 0x%08x\n", value);
+	mfsdram(value, mem_mb1cf);
+	printf ("    SDRAM0_B1CR  : 0x%08x\n", value);
+	mfsdram(value, mem_sdtr1);
+	printf ("    SDRAM0_TR    : 0x%08x\n", value);
+	mfsdram(value, mem_rtr);
+	printf ("    SDRAM0_RTR   : 0x%08x\n", value);
+}
+#endif
+
+#define SDRAM_LEN 32*1024*1024 /* 32 MB -RAM */
+
+/*
+ * this is even after checkboard. It returns the size of the SDRAM
+ * that we have installed. This function is called by board_init_f
+ * in lib_ppc/board.c to initialize the memory and return what I
+ * found. These are default value, which will be overridden later.
+ */
+
+long int fixed_hcu4_sdram (int board_type)
+{
+#ifdef DEBUG
+	printf (__FUNCTION__);
+#endif
+	/* disable memory controller */
+	mtdcr (memcfga, mem_mcopt1);
+	mtdcr (memcfgd, 0x00000000);
+
+	udelay (500);
+
+	/* Clear SDRAM0_BESR0 (Bus Error Syndrome Register) */
+	mtdcr (memcfga, mem_besra);
+	mtdcr (memcfgd, 0xffffffff);
+
+	/* Clear SDRAM0_BESR1 (Bus Error Syndrome Register) */
+	mtdcr (memcfga, mem_besrb);
+	mtdcr (memcfgd, 0xffffffff);
+
+	/* Clear SDRAM0_ECCCFG (disable ECC) */
+	mtdcr (memcfga, mem_ecccf);
+	mtdcr (memcfgd, 0x00000000);
+
+	/* Clear SDRAM0_ECCESR (ECC Error Syndrome Register) */
+	mtdcr (memcfga, mem_eccerr);
+	mtdcr (memcfgd, 0xffffffff);
+
+	/* Timing register: CASL=2, PTA=2, CTP=2, LDF=1, RFTA=5, RCD=2
+	 * TODO ngngng
+	 */
+	mtdcr (memcfga, mem_sdtr1);
+	mtdcr (memcfgd, 0x008a4015);
+
+	/* Memory Bank 0 Config == BA=0x00000000, SZ=64M, AM=3, BE=1
+	 * TODO ngngng
+	 */
+	mtdcr (memcfga, mem_mb0cf);
+	mtdcr (memcfgd, 0x00062001);
+
+	/* refresh timer = 0x400  */
+	mtdcr (memcfga, mem_rtr);
+	mtdcr (memcfgd, 0x04000000);
+
+	/* Power management idle timer set to the default. */
+	mtdcr (memcfga, mem_pmit);
+	mtdcr (memcfgd, 0x07c00000);
+
+	udelay (500);
+
+	/* Enable banks (DCE=1, BPRF=1, ECCDD=1, EMDUL=1) TODO */
+	mtdcr (memcfga, mem_mcopt1);
+	mtdcr (memcfgd, 0x90800000);
+
+#ifdef DEBUG
+	printf ("%s: done\n", __FUNCTION__);
+#endif
+	return SDRAM_LEN;
+}
+
+/*---------------------------------------------------------------------------+
+ * getSerialNr
+ *---------------------------------------------------------------------------*/
+static u32 getSerialNr(void)
+{
+	u32 *serial = (u32 *)CFG_FLASH_BASE;
+	if (*serial == 0xffffffff) {
+		return get_ticks();
+	}
+	return *serial;
+}
+
+
+/*---------------------------------------------------------------------------+
+ * misc_init_r.
+ *---------------------------------------------------------------------------*/
+
+int misc_init_r(void)
+{
+	char *s = getenv("ethaddr");
+	char *e;
+	int i;
+	u32 serial =  getSerialNr();
+	for (i = 0; i < 6; ++i) {
+		gd->bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
+		if (s)
+			s = (*e) ? e + 1 : e;
+	}
+	if (gd->bd->bi_enetaddr[3] == 0 &&
+	    gd->bd->bi_enetaddr[4] == 0 &&
+	    gd->bd->bi_enetaddr[5] == 0) {
+		char ethaddr[22];
+		/* [0..3] Must be in sync with CONFIG_ETHADDR */
+		gd->bd->bi_enetaddr[0] = 0x00;
+		gd->bd->bi_enetaddr[1] = 0x60;
+		gd->bd->bi_enetaddr[2] = 0x13;
+		gd->bd->bi_enetaddr[3] = (serial          >> 16) & 0xff;
+		gd->bd->bi_enetaddr[4] = (serial          >>  8) & 0xff;
+		gd->bd->bi_enetaddr[5] = (serial          >>  0) & 0xff;
+		sprintf (ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X\0",
+			 gd->bd->bi_enetaddr[0], gd->bd->bi_enetaddr[1],
+			 gd->bd->bi_enetaddr[2], gd->bd->bi_enetaddr[3],
+			 gd->bd->bi_enetaddr[4], gd->bd->bi_enetaddr[5]) ;
+		printf("%s: Setting eth %s serial 0x%x\n",  __FUNCTION__,
+		       ethaddr, serial);
+		setenv ("ethaddr", ethaddr);
+	}
+	return 0;
+}
+
+#define DO_UGLY_SDRAM_WORKAROUND
+#ifdef  DO_UGLY_SDRAM_WORKAROUND
+	#include "i2c.h"
+void set_spd_default_value(unsigned int spd_addr,uchar def_val)
+{
+	uchar value;
+	int res = i2c_read(SPD_EEPROM_ADDRESS, spd_addr, 1, &value, 1) ;
+	if (res == 0 && value == 0xff) {
+		res = i2c_write(SPD_EEPROM_ADDRESS,
+				spd_addr, 1, &def_val, 1) ;
+#ifdef DEBUG
+		printf("%s: Setting spd offset %3d to %3d res %d\n",
+		       __FUNCTION__, spd_addr,  def_val, res);
+#endif
+	}
+}
+#endif
+
+long int initdram(int board_type)
+{
+	long dram_size = 0;
+
+#if !defined(CONFIG_SPD_EEPROM)
+	dram_size = fixed_hcu4_sdram();
+#else
+#ifdef  DO_UGLY_SDRAM_WORKAROUND
+	/* Workaround if you have no working I2C-EEPROM-SPD-configuration */
+	i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
+	set_spd_default_value(2,  4); /* SDRAM Type */
+	set_spd_default_value(7,  0); /* module width, high byte */
+	set_spd_default_value(12, 1); /* Refresh or 0x81 */
+
+	/* Only correct for HCU3 with 32 MB RAM*/
+	/* Number of bytes used by module manufacturer */
+	set_spd_default_value( 0, 128);
+	set_spd_default_value( 1, 11 ); /* Total SPD memory size */
+	set_spd_default_value( 2, 4  ); /* Memory type */
+	set_spd_default_value( 3, 12 ); /* Number of row address bits */
+	set_spd_default_value( 4, 9  ); /* Number of column address bits */
+	set_spd_default_value( 5, 1  ); /* Number of module rows */
+	set_spd_default_value( 6, 32 ); /* Module data width, LSB */
+	set_spd_default_value( 7, 0  ); /* Module data width, MSB */
+	set_spd_default_value( 8, 1  ); /* Module interface signal levels */
+	/* SDRAM cycle time for highest CL (Tclk) */
+	set_spd_default_value( 9, 112);
+	/* SDRAM access time from clock for highest CL (Tac) */
+	set_spd_default_value(10, 84 );
+	set_spd_default_value(11, 2  ); /* Module configuration type */
+	set_spd_default_value(12, 128); /* Refresh rate/type */
+	set_spd_default_value(13, 16 ); /* Primary SDRAM width */
+	set_spd_default_value(14, 8  ); /* Error Checking SDRAM width */
+	/* SDRAM device attributes, min clock delay for back to back */
+	/*random column addresses (Tccd) */
+	set_spd_default_value(15, 1  );
+	/* SDRAM device attributes, burst lengths supported */
+	set_spd_default_value(16, 143);
+	/* SDRAM device attributes, number of banks on SDRAM device */
+	set_spd_default_value(17, 4  );
+	/* SDRAM device attributes, CAS latency */
+	set_spd_default_value(18, 6  );
+	/* SDRAM device attributes, CS latency */
+	set_spd_default_value(19, 1  );
+	/* SDRAM device attributes, WE latency */
+	set_spd_default_value(20, 1  );
+	set_spd_default_value(21, 0  ); /* SDRAM module attributes */
+	/* SDRAM device attributes, general */
+	set_spd_default_value(22, 14 );
+	/* SDRAM cycle time for 2nd highest CL (Tclk) */
+	set_spd_default_value(23, 117);
+	/* SDRAM access time from clock for2nd highest CL (Tac) */
+	set_spd_default_value(24, 84 );
+	/* SDRAM cycle time for 3rd highest CL (Tclk) */
+	set_spd_default_value(25, 0  );
+	/* SDRAM access time from clock for3rd highest CL (Tac) */
+	set_spd_default_value(26, 0  );
+	set_spd_default_value(27, 15 ); /* Minimum row precharge time (Trp) */
+	/* Minimum row active to row active delay (Trrd) */
+	set_spd_default_value(28, 14 );
+	set_spd_default_value(29, 15 ); /* Minimum CAS to RAS delay (Trcd) */
+	set_spd_default_value(30, 37 ); /* Minimum RAS pulse width (Tras) */
+	set_spd_default_value(31, 8  ); /* Module bank density */
+	/* Command and Address signal input setup time */
+	set_spd_default_value(32, 21 );
+	/* Command and Address signal input hold time */
+	set_spd_default_value(33, 8  );
+	set_spd_default_value(34, 21 ); /* Data signal input setup time */
+	set_spd_default_value(35, 8  ); /* Data signal input hold time */
+#endif  /* DO_UGLY_SDRAM_WORKAROUND */
+	dram_size = spd_sdram(0);
+#endif
+
+#ifdef DEBUG
+	show_sdram_registers();
+#endif
+
+#if defined(CFG_DRAM_TEST)
+	bcu4_testdram(dram_size);
+	printf("%s %d MB of SDRAM\n", __FUNCTION__, dram_size/(1024*1024));
+#endif
+	return dram_size;
+}
+
+