* Patch by Travis Sawyer, 01 Mar 2004:

  Ocotea:
  - Add IBM PPC440GX Ref Platform support (Ocotea)
    Original code by Paul Reynolds <PaulReynolds@lhsolutions.com>
    Adapted to U-Boot and 440GX port
  440gx_enet.c:
  - Add gracious handling of all Ethernet Pin Selections for 440GX
  - Add RGMII selection for Cicada CIS8201 Gigabit PHY
  ppc440.h:
  - Add needed bit definitions
  - Fix formatting

* Patch by Carl Riechers, 1 Mar 2004:
  Add PPC440GX prbdv0 divider to fix memory clock calculation.

* Patch by Stephan Linz, 27 Feb 2004
  - avoid problems for targets without NFS download support

1 files changed, 459 insertions, 0 deletions

diff --git a/board/ocotea/ocotea.c b/board/ocotea/ocotea.c
new file mode 100644
index 0000000..4324e57
--- /dev/null
+++ b/board/ocotea/ocotea.c
@@ -0,0 +1,459 @@
+/*
+ *  Copyright (C) 2004 PaulReynolds@lhsolutions.com
+ *
+ * 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 "ocotea.h"
+#include <asm/processor.h>
+#include <spd_sdram.h>
+#include <440gx_enet.h>
+
+#define BOOT_SMALL_FLASH	32	/* 00100000 */
+#define FLASH_ONBD_N		2	/* 00000010 */
+#define FLASH_SRAM_SEL		1	/* 00000001 */
+
+long int fixed_sdram (void);
+void fpga_init (void);
+
+int board_early_init_f (void)
+{
+	/*-------------------------------------------------------------------------+
+	  | Initialize EBC CONFIG
+	  +-------------------------------------------------------------------------*/
+	mtebc(xbcfg, EBC_CFG_LE_UNLOCK |
+	      EBC_CFG_PTD_ENABLE | EBC_CFG_RTC_64PERCLK |
+	      EBC_CFG_ATC_PREVIOUS | EBC_CFG_DTC_PREVIOUS |
+	      EBC_CFG_CTC_PREVIOUS | EBC_CFG_EMC_NONDEFAULT |
+	      EBC_CFG_PME_DISABLE | EBC_CFG_PR_32);
+
+	/*-------------------------------------------------------------------------+
+	  | 1 MB FLASH / 1 MB SRAM. Initialize bank 0 with default values.
+	  +-------------------------------------------------------------------------*/
+	mtebc(pb0ap, EBC_BXAP_BME_DISABLED|EBC_BXAP_TWT_ENCODE(8)|
+	      EBC_BXAP_BCE_DISABLE|
+	      EBC_BXAP_CSN_ENCODE(1)|EBC_BXAP_OEN_ENCODE(1)|
+	      EBC_BXAP_WBN_ENCODE(1)|EBC_BXAP_WBF_ENCODE(1)|
+	      EBC_BXAP_TH_ENCODE(1)|EBC_BXAP_RE_DISABLED|
+	      EBC_BXAP_BEM_WRITEONLY|
+	      EBC_BXAP_PEN_DISABLED);
+	mtebc(pb0cr, EBC_BXCR_BAS_ENCODE(0xFFE00000)|
+	      EBC_BXCR_BS_2MB|EBC_BXCR_BU_RW|EBC_BXCR_BW_8BIT);
+
+	/*-------------------------------------------------------------------------+
+	  | 8KB NVRAM/RTC. Initialize bank 1 with default values.
+	  +-------------------------------------------------------------------------*/
+	mtebc(pb1ap, EBC_BXAP_BME_DISABLED|EBC_BXAP_TWT_ENCODE(10)|
+	      EBC_BXAP_BCE_DISABLE|
+	      EBC_BXAP_CSN_ENCODE(1)|EBC_BXAP_OEN_ENCODE(1)|
+	      EBC_BXAP_WBN_ENCODE(1)|EBC_BXAP_WBF_ENCODE(1)|
+	      EBC_BXAP_TH_ENCODE(1)|EBC_BXAP_RE_DISABLED|
+	      EBC_BXAP_BEM_WRITEONLY|
+	      EBC_BXAP_PEN_DISABLED);
+	mtebc(pb1cr, EBC_BXCR_BAS_ENCODE(0x48000000)|
+	      EBC_BXCR_BS_1MB|EBC_BXCR_BU_RW|EBC_BXCR_BW_8BIT);
+
+	/*-------------------------------------------------------------------------+
+	  | 4 MB FLASH. Initialize bank 2 with default values.
+	  +-------------------------------------------------------------------------*/
+	mtebc(pb2ap, EBC_BXAP_BME_DISABLED|EBC_BXAP_TWT_ENCODE(10)|
+	      EBC_BXAP_BCE_DISABLE|
+	      EBC_BXAP_CSN_ENCODE(1)|EBC_BXAP_OEN_ENCODE(1)|
+	      EBC_BXAP_WBN_ENCODE(1)|EBC_BXAP_WBF_ENCODE(1)|
+	      EBC_BXAP_TH_ENCODE(1)|EBC_BXAP_RE_DISABLED|
+	      EBC_BXAP_BEM_WRITEONLY|
+	      EBC_BXAP_PEN_DISABLED);
+	mtebc(pb2cr, EBC_BXCR_BAS_ENCODE(0xFF800000)|
+	      EBC_BXCR_BS_4MB|EBC_BXCR_BU_RW|EBC_BXCR_BW_8BIT);
+
+	/*-------------------------------------------------------------------------+
+	  | FPGA. Initialize bank 7 with default values.
+	  +-------------------------------------------------------------------------*/
+	mtebc(pb7ap, EBC_BXAP_BME_DISABLED|EBC_BXAP_TWT_ENCODE(7)|
+	      EBC_BXAP_BCE_DISABLE|
+	      EBC_BXAP_CSN_ENCODE(1)|EBC_BXAP_OEN_ENCODE(1)|
+	      EBC_BXAP_WBN_ENCODE(1)|EBC_BXAP_WBF_ENCODE(1)|
+	      EBC_BXAP_TH_ENCODE(1)|EBC_BXAP_RE_DISABLED|
+	      EBC_BXAP_BEM_WRITEONLY|
+	      EBC_BXAP_PEN_DISABLED);
+	mtebc(pb7cr, EBC_BXCR_BAS_ENCODE(0x48300000)|
+	      EBC_BXCR_BS_1MB|EBC_BXCR_BU_RW|EBC_BXCR_BW_8BIT);
+
+	/*--------------------------------------------------------------------
+	 * Setup the interrupt controller polarities, triggers, etc.
+	 *-------------------------------------------------------------------*/
+	mtdcr (uic0sr, 0xffffffff);	/* clear all */
+	mtdcr (uic0er, 0x00000000);	/* disable all */
+	mtdcr (uic0cr, 0x00000009);	/* SMI & UIC1 crit are critical */
+	mtdcr (uic0pr, 0xfffffe13);	/* per ref-board manual */
+	mtdcr (uic0tr, 0x01c00008);	/* per ref-board manual */
+	mtdcr (uic0vr, 0x00000001);	/* int31 highest, base=0x000 */
+	mtdcr (uic0sr, 0xffffffff);	/* clear all */
+
+	mtdcr (uic1sr, 0xffffffff);	/* clear all */
+	mtdcr (uic1er, 0x00000000);	/* disable all */
+	mtdcr (uic1cr, 0x00000000);	/* all non-critical */
+	mtdcr (uic1pr, 0xffffe0ff);	/* per ref-board manual */
+	mtdcr (uic1tr, 0x00ffc000);	/* per ref-board manual */
+	mtdcr (uic1vr, 0x00000001);	/* int31 highest, base=0x000 */
+	mtdcr (uic1sr, 0xffffffff);	/* clear all */
+
+	fpga_init();
+
+	return 0;
+}
+
+
+int checkboard (void)
+{
+	sys_info_t sysinfo;
+
+	get_sys_info (&sysinfo);
+
+	printf ("Board: IBM 440GX Evaluation Board\n");
+	printf ("\tVCO: %lu MHz\n", sysinfo.freqVCOMhz / 1000000);
+	printf ("\tCPU: %lu MHz\n", sysinfo.freqProcessor / 1000000);
+	printf ("\tPLB: %lu MHz\n", sysinfo.freqPLB / 1000000);
+	printf ("\tOPB: %lu MHz\n", sysinfo.freqOPB / 1000000);
+	printf ("\tEPB: %lu MHz\n", sysinfo.freqEPB / 1000000);
+	return (0);
+}
+
+
+long int initdram (int board_type)
+{
+	long dram_size = 0;
+
+#if defined(CONFIG_SPD_EEPROM)
+	dram_size = spd_sdram (0);
+#else
+	dram_size = fixed_sdram ();
+#endif
+	return dram_size;
+}
+
+
+#if defined(CFG_DRAM_TEST)
+int testdram (void)
+{
+	uint *pstart = (uint *) 0x00000000;
+	uint *pend = (uint *) 0x08000000;
+	uint *p;
+
+	for (p = pstart; p < pend; p++)
+		*p = 0xaaaaaaaa;
+
+	for (p = pstart; p < pend; p++) {
+		if (*p != 0xaaaaaaaa) {
+			printf ("SDRAM test fails at: %08x\n", (uint) p);
+			return 1;
+		}
+	}
+
+	for (p = pstart; p < pend; p++)
+		*p = 0x55555555;
+
+	for (p = pstart; p < pend; p++) {
+		if (*p != 0x55555555) {
+			printf ("SDRAM test fails at: %08x\n", (uint) p);
+			return 1;
+		}
+	}
+	return 0;
+}
+#endif
+
+#if !defined(CONFIG_SPD_EEPROM)
+/*************************************************************************
+ *  fixed sdram init -- doesn't use serial presence detect.
+ *
+ *  Assumes:    128 MB, non-ECC, non-registered
+ *              PLB @ 133 MHz
+ *
+ ************************************************************************/
+long int fixed_sdram (void)
+{
+	uint reg;
+
+	/*--------------------------------------------------------------------
+	 * Setup some default
+	 *------------------------------------------------------------------*/
+	mtsdram (mem_uabba, 0x00000000);	/* ubba=0 (default)             */
+	mtsdram (mem_slio, 0x00000000);		/* rdre=0 wrre=0 rarw=0         */
+	mtsdram (mem_devopt, 0x00000000);	/* dll=0 ds=0 (normal)          */
+	mtsdram (mem_wddctr, 0x00000000);	/* wrcp=0 dcd=0                 */
+	mtsdram (mem_clktr, 0x40000000);	/* clkp=1 (90 deg wr) dcdt=0    */
+
+	/*--------------------------------------------------------------------
+	 * Setup for board-specific specific mem
+	 *------------------------------------------------------------------*/
+	/*
+	 * Following for CAS Latency = 2.5 @ 133 MHz PLB
+	 */
+	mtsdram (mem_b0cr, 0x000a4001);	/* SDBA=0x000 128MB, Mode 3, enabled */
+	mtsdram (mem_tr0, 0x410a4012);	/* WR=2  WD=1 CL=2.5 PA=3 CP=4 LD=2 */
+	/* RA=10 RD=3                       */
+	mtsdram (mem_tr1, 0x8080082f);	/* SS=T2 SL=STAGE 3 CD=1 CT=0x02f   */
+	mtsdram (mem_rtr, 0x08200000);	/* Rate 15.625 ns @ 133 MHz PLB     */
+	mtsdram (mem_cfg1, 0x00000000);	/* Self-refresh exit, disable PM    */
+	udelay (400);			/* Delay 200 usecs (min)            */
+
+	/*--------------------------------------------------------------------
+	 * Enable the controller, then wait for DCEN to complete
+	 *------------------------------------------------------------------*/
+	mtsdram (mem_cfg0, 0x86000000);	/* DCEN=1, PMUD=1, 64-bit           */
+	for (;;) {
+		mfsdram (mem_mcsts, reg);
+		if (reg & 0x80000000)
+			break;
+	}
+
+	return (128 * 1024 * 1024);	/* 128 MB                           */
+}
+#endif	/* !defined(CONFIG_SPD_EEPROM) */
+
+
+/*************************************************************************
+ *  pci_pre_init
+ *
+ *  This routine is called just prior to registering the hose and gives
+ *  the board the opportunity to check things. Returning a value of zero
+ *  indicates that things are bad & PCI initialization should be aborted.
+ *
+ *	Different boards may wish to customize the pci controller structure
+ *	(add regions, override default access routines, etc) or perform
+ *	certain pre-initialization actions.
+ *
+ ************************************************************************/
+#if defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT)
+int pci_pre_init(struct pci_controller * hose )
+{
+	unsigned long strap;
+
+	/*--------------------------------------------------------------------------+
+	 *	The ocotea board is always configured as the host & requires the
+	 *	PCI arbiter to be enabled.
+	 *--------------------------------------------------------------------------*/
+	mfsdr(sdr_sdstp1, strap);
+	if( (strap & SDR0_SDSTP1_PAE_MASK) == 0 ){
+		printf("PCI: SDR0_STRP1[%08lX] - PCI Arbiter disabled.\n",strap);
+		return 0;
+	}
+
+	return 1;
+}
+#endif /* defined(CONFIG_PCI) && defined(CFG_PCI_PRE_INIT) */
+
+/*************************************************************************
+ *  pci_target_init
+ *
+ *	The bootstrap configuration provides default settings for the pci
+ *	inbound map (PIM). But the bootstrap config choices are limited and
+ *	may not be sufficient for a given board.
+ *
+ ************************************************************************/
+#if defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT)
+void pci_target_init(struct pci_controller * hose )
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	/*--------------------------------------------------------------------------+
+	 * Disable everything
+	 *--------------------------------------------------------------------------*/
+	out32r( PCIX0_PIM0SA, 0 ); /* disable */
+	out32r( PCIX0_PIM1SA, 0 ); /* disable */
+	out32r( PCIX0_PIM2SA, 0 ); /* disable */
+	out32r( PCIX0_EROMBA, 0 ); /* disable expansion rom */
+
+	/*--------------------------------------------------------------------------+
+	 * Map all of SDRAM to PCI address 0x0000_0000. Note that the 440 strapping
+	 * options to not support sizes such as 128/256 MB.
+	 *--------------------------------------------------------------------------*/
+	out32r( PCIX0_PIM0LAL, CFG_SDRAM_BASE );
+	out32r( PCIX0_PIM0LAH, 0 );
+	out32r( PCIX0_PIM0SA, ~(gd->ram_size - 1) | 1 );
+
+	out32r( PCIX0_BAR0, 0 );
+
+	/*--------------------------------------------------------------------------+
+	 * Program the board's subsystem id/vendor id
+	 *--------------------------------------------------------------------------*/
+	out16r( PCIX0_SBSYSVID, CFG_PCI_SUBSYS_VENDORID );
+	out16r( PCIX0_SBSYSID, CFG_PCI_SUBSYS_DEVICEID );
+
+	out16r( PCIX0_CMD, in16r(PCIX0_CMD) | PCI_COMMAND_MEMORY );
+}
+#endif /* defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT) */
+
+
+/*************************************************************************
+ *  is_pci_host
+ *
+ *	This routine is called to determine if a pci scan should be
+ *	performed. With various hardware environments (especially cPCI and
+ *	PPMC) it's insufficient to depend on the state of the arbiter enable
+ *	bit in the strap register, or generic host/adapter assumptions.
+ *
+ *	Rather than hard-code a bad assumption in the general 440 code, the
+ *	440 pci code requires the board to decide at runtime.
+ *
+ *	Return 0 for adapter mode, non-zero for host (monarch) mode.
+ *
+ *
+ ************************************************************************/
+#if defined(CONFIG_PCI)
+int is_pci_host(struct pci_controller *hose)
+{
+    /* The ocotea board is always configured as host. */
+    return(1);
+}
+#endif /* defined(CONFIG_PCI) */
+
+
+void fpga_init(void)
+{
+	unsigned long group;
+	unsigned long sdr0_pfc0;
+	unsigned long sdr0_pfc1;
+	unsigned long sdr0_cust0;
+	unsigned long pvr;
+
+	mfsdr (sdr_pfc0, sdr0_pfc0);
+	mfsdr (sdr_pfc1, sdr0_pfc1);
+	group = SDR0_PFC1_EPS_DECODE(sdr0_pfc1);
+	pvr = get_pvr ();
+
+	sdr0_pfc0 = (sdr0_pfc0 & ~SDR0_PFC0_GEIE_MASK) | SDR0_PFC0_GEIE_TRE;
+	if ( ((pvr == PVR_440GX_RA) || (pvr == PVR_440GX_RB)) && ((group == 4) || (group == 5))) {
+		sdr0_pfc0 = (sdr0_pfc0 & ~SDR0_PFC0_TRE_MASK) | SDR0_PFC0_TRE_DISABLE;
+		sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_CTEMS_MASK) | SDR0_PFC1_CTEMS_EMS;
+		out8(FPGA_REG2, (in8(FPGA_REG2) & ~FPGA_REG2_EXT_INTFACE_MASK) |
+		     FPGA_REG2_EXT_INTFACE_ENABLE);
+		mtsdr (sdr_pfc0, sdr0_pfc0);
+		mtsdr (sdr_pfc1, sdr0_pfc1);
+	} else {
+		sdr0_pfc0 = (sdr0_pfc0 & ~SDR0_PFC0_TRE_MASK) | SDR0_PFC0_TRE_ENABLE;
+		switch (group)
+		{
+		case 0:
+		case 1:
+		case 2:
+			/* CPU trace A */
+			out8(FPGA_REG2, (in8(FPGA_REG2) & ~FPGA_REG2_EXT_INTFACE_MASK) |
+			     FPGA_REG2_EXT_INTFACE_ENABLE);
+			sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_CTEMS_MASK) | SDR0_PFC1_CTEMS_EMS;
+			mtsdr (sdr_pfc0, sdr0_pfc0);
+			mtsdr (sdr_pfc1, sdr0_pfc1);
+			break;
+		case 3:
+		case 4:
+		case 5:
+		case 6:
+			/* CPU trace B - Over EBMI */
+			sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_CTEMS_MASK) | SDR0_PFC1_CTEMS_CPUTRACE;
+			mtsdr (sdr_pfc0, sdr0_pfc0);
+			mtsdr (sdr_pfc1, sdr0_pfc1);
+			out8(FPGA_REG2, (in8(FPGA_REG2) & ~FPGA_REG2_EXT_INTFACE_MASK) |
+			     FPGA_REG2_EXT_INTFACE_DISABLE);
+			break;
+		}
+	}
+
+	/* Initialize the ethernet specific functions in the fpga */
+	mfsdr(sdr_pfc1, sdr0_pfc1);
+	mfsdr(sdr_cust0, sdr0_cust0);
+	if ( (SDR0_PFC1_EPS_DECODE(sdr0_pfc1) == 4) &&
+	    ((SDR0_CUST0_RGMII2_DECODE(sdr0_cust0) == RGMII_FER_GMII) ||
+	     (SDR0_CUST0_RGMII2_DECODE(sdr0_cust0) == RGMII_FER_TBI)))
+	{
+		if ((in8(FPGA_REG0) & FPGA_REG0_ECLS_MASK) == FPGA_REG0_ECLS_VER1)
+		{
+			out8(FPGA_REG3, (in8(FPGA_REG3) & ~FPGA_REG3_ENET_MASK1) |
+			     FPGA_REG3_ENET_GROUP7);
+		}
+		else
+		{
+			if (SDR0_CUST0_RGMII2_DECODE(sdr0_cust0) == RGMII_FER_GMII)
+			{
+				out8(FPGA_REG3, (in8(FPGA_REG3) & ~FPGA_REG3_ENET_MASK2) |
+				     FPGA_REG3_ENET_GROUP7);
+			}
+			else
+			{
+				out8(FPGA_REG3, (in8(FPGA_REG3) & ~FPGA_REG3_ENET_MASK2) |
+				     FPGA_REG3_ENET_GROUP8);
+			}
+		}
+	}
+	else
+	{
+		if ((in8(FPGA_REG0) & FPGA_REG0_ECLS_MASK) == FPGA_REG0_ECLS_VER1)
+		{
+			out8(FPGA_REG3, (in8(FPGA_REG3) & ~FPGA_REG3_ENET_MASK1) |
+			     FPGA_REG3_ENET_ENCODE1(SDR0_PFC1_EPS_DECODE(sdr0_pfc1)));
+		}
+		else
+		{
+			out8(FPGA_REG3, (in8(FPGA_REG3) & ~FPGA_REG3_ENET_MASK2) |
+			     FPGA_REG3_ENET_ENCODE2(SDR0_PFC1_EPS_DECODE(sdr0_pfc1)));
+		}
+	}
+	out8(FPGA_REG4, FPGA_REG4_GPHY_MODE10 |
+	     FPGA_REG4_GPHY_MODE100 | FPGA_REG4_GPHY_MODE1000 |
+	     FPGA_REG4_GPHY_FRC_DPLX | FPGA_REG4_CONNECT_PHYS);
+
+	/* reset the gigabyte phy if necessary */
+	if (SDR0_PFC1_EPS_DECODE(sdr0_pfc1) >= 3)
+	{
+		if ((in8(FPGA_REG0) & FPGA_REG0_ECLS_MASK) == FPGA_REG0_ECLS_VER1)
+		{
+			out8(FPGA_REG3, in8(FPGA_REG3) & ~FPGA_REG3_GIGABIT_RESET_DISABLE);
+			udelay(10000);
+			out8(FPGA_REG3, in8(FPGA_REG3) | FPGA_REG3_GIGABIT_RESET_DISABLE);
+		}
+		else
+		{
+			out8(FPGA_REG2, in8(FPGA_REG2) & ~FPGA_REG2_GIGABIT_RESET_DISABLE);
+			udelay(10000);
+			out8(FPGA_REG2, in8(FPGA_REG2) | FPGA_REG2_GIGABIT_RESET_DISABLE);
+		}
+	}
+
+	/* Turn off the LED's */
+	out8(FPGA_REG3, (in8(FPGA_REG3) & ~FPGA_REG3_STAT_MASK) |
+	     FPGA_REG3_STAT_LED8_DISAB | FPGA_REG3_STAT_LED4_DISAB |
+	     FPGA_REG3_STAT_LED2_DISAB | FPGA_REG3_STAT_LED1_DISAB);
+
+	return;
+}
+
+#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 (ctrlc());
+}
+#endif
+