Add support for AMCC 440SP, add support for AMCC Luan 440SP eval board.
Patch by John Otken, 23 Nov 2005
diff --git a/board/amcc/luan/luan.c b/board/amcc/luan/luan.c
new file mode 100644
index 0000000..c6b79a9
--- /dev/null
+++ b/board/amcc/luan/luan.c
@@ -0,0 +1,458 @@
+/*
+ * (C) Copyright 2005
+ * John Otken, jotken@softadvances.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 <command.h>
+#include <ppc4xx.h>
+#include <asm/processor.h>
+#include <spd_sdram.h>
+#include "epld.h"
+
+
+extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+
+/*************************************************************************
+ * int board_early_init_f()
+ *
+ ************************************************************************/
+int board_early_init_f(void)
+{
+ volatile epld_t *x = (epld_t *) CFG_EPLD_BASE;
+
+ mtebc( pb0ap, 0x03800000 ); /* set chip selects */
+ mtebc( pb0cr, 0xffc58000 ); /* ebc0_b0cr, 4MB at 0xffc00000 CS0 */
+ mtebc( pb1ap, 0x03800000 );
+ mtebc( pb1cr, 0xff018000 ); /* ebc0_b1cr, 1MB at 0xff000000 CS1 */
+ mtebc( pb2ap, 0x03800000 );
+ mtebc( pb2cr, 0xff838000 ); /* ebc0_b2cr, 2MB at 0xff800000 CS2 */
+
+ mtdcr( uic1sr, 0xffffffff ); /* Clear all interrupts */
+ mtdcr( uic1er, 0x00000000 ); /* disable all interrupts */
+ mtdcr( uic1cr, 0x00000000 ); /* Set Critical / Non Critical interrupts */
+ mtdcr( uic1pr, 0x7fff83ff ); /* Set Interrupt Polarities */
+ mtdcr( uic1tr, 0x001f8000 ); /* Set Interrupt Trigger Levels */
+ mtdcr( uic1vr, 0x00000001 ); /* Set Vect base=0,INT31 Highest priority */
+ mtdcr( uic1sr, 0x00000000 ); /* clear all interrupts */
+ mtdcr( uic1sr, 0xffffffff );
+
+ mtdcr( uic0sr, 0xffffffff ); /* Clear all interrupts */
+ mtdcr( uic0er, 0x00000000 ); /* disable all interrupts excepted cascade */
+ mtdcr( uic0cr, 0x00000001 ); /* Set Critical / Non Critical interrupts */
+ mtdcr( uic0pr, 0xffffffff ); /* Set Interrupt Polarities */
+ mtdcr( uic0tr, 0x01000004 ); /* Set Interrupt Trigger Levels */
+ mtdcr( uic0vr, 0x00000001 ); /* Set Vect base=0,INT31 Highest priority */
+ mtdcr( uic0sr, 0x00000000 ); /* clear all interrupts */
+ mtdcr( uic0sr, 0xffffffff );
+
+ x->ethuart &= ~EPLD2_RESET_ETH_N; /* put Ethernet+PHY in reset */
+
+ return 0;
+}
+
+
+/*************************************************************************
+ * int misc_init_r()
+ *
+ ************************************************************************/
+int misc_init_r(void)
+{
+ volatile epld_t *x = (epld_t *) CFG_EPLD_BASE;
+ x->ethuart |= EPLD2_RESET_ETH_N; /* take Ethernet+PHY out of reset */
+
+ return 0;
+}
+
+
+/*************************************************************************
+ * int checkboard()
+ *
+ ************************************************************************/
+int checkboard(void)
+{
+ char *s = getenv("serial#");
+
+ printf("Board: Luan - AMCC PPC440SP Evaluation Board");
+
+ if (s != NULL) {
+ puts(", serial# ");
+ puts(s);
+ }
+ putc('\n');
+
+ return 0;
+}
+
+
+/*************************************************************************
+ * long int fixed_sdram()
+ *
+ ************************************************************************/
+static long int fixed_sdram(void)
+{ /* DDR2 init from BDI2000 script */
+ mtdcr( 0x10, 0x00000021 ); /* MCIF0_MCOPT2 - zero DCEN bit */
+ mtdcr( 0x11, 0x84000000 );
+ mtdcr( 0x10, 0x00000020 ); /* MCIF0_MCOPT1 - no ECC, 64 bits, 4 banks, DDR2 */
+ mtdcr( 0x11, 0x2D122000 );
+ mtdcr( 0x10, 0x00000026 ); /* MCIF0_CODT - die termination on */
+ mtdcr( 0x11, 0x00800026 );
+ mtdcr( 0x10, 0x00000081 ); /* MCIF0_WRDTR - Write DQS Adv 90 + Fractional DQS Delay */
+ mtdcr( 0x11, 0x82000800 );
+ mtdcr( 0x10, 0x00000080 ); /* MCIF0_CLKTR - advance addr clock by 180 deg */
+ mtdcr( 0x11, 0x80000000 );
+ mtdcr( 0x10, 0x00000040 ); /* MCIF0_MB0CF - turn on CS0, N x 10 coll */
+ mtdcr( 0x11, 0x00000201 );
+ mtdcr( 0x10, 0x00000044 ); /* MCIF0_MB1CF - turn on CS0, N x 10 coll */
+ mtdcr( 0x11, 0x00000201 );
+ mtdcr( 0x10, 0x00000030 ); /* MCIF0_RTR - refresh every 7.8125uS */
+ mtdcr( 0x11, 0x08200000 );
+ mtdcr( 0x10, 0x00000085 ); /* MCIF0_SDTR1 - timing register 1 */
+ mtdcr( 0x11, 0x80201000 );
+ mtdcr( 0x10, 0x00000086 ); /* MCIF0_SDTR2 - timing register 2 */
+ mtdcr( 0x11, 0x42103242 );
+ mtdcr( 0x10, 0x00000087 ); /* MCIF0_SDTR3 - timing register 3 */
+ mtdcr( 0x11, 0x0C100D14 );
+ mtdcr( 0x10, 0x00000088 ); /* MCIF0_MMODE - CAS is 4 cycles */
+ mtdcr( 0x11, 0x00000642 );
+ mtdcr( 0x10, 0x00000089 ); /* MCIF0_MEMODE - diff DQS disabled */
+ mtdcr( 0x11, 0x00000400 ); /* ODT term disabled */
+
+ mtdcr( 0x10, 0x00000050 ); /* MCIF0_INITPLR0 - NOP */
+ mtdcr( 0x11, 0x81b80000 );
+ mtdcr( 0x10, 0x00000051 ); /* MCIF0_INITPLR1 - PRE */
+ mtdcr( 0x11, 0x82100400 );
+ mtdcr( 0x10, 0x00000052 ); /* MCIF0_INITPLR2 - EMR2 */
+ mtdcr( 0x11, 0x80820000 );
+ mtdcr( 0x10, 0x00000053 ); /* MCIF0_INITPLR3 - EMR3 */
+ mtdcr( 0x11, 0x80830000 );
+ mtdcr( 0x10, 0x00000054 ); /* MCIF0_INITPLR4 - EMR DLL ENABLE */
+ mtdcr( 0x11, 0x80810000 );
+ mtdcr( 0x10, 0x00000055 ); /* MCIF0_INITPLR5 - MR DLL RESET */
+ mtdcr( 0x11, 0x80800542 );
+ mtdcr( 0x10, 0x00000056 ); /* MCIF0_INITPLR6 - PRE */
+ mtdcr( 0x11, 0x82100400 );
+ mtdcr( 0x10, 0x00000057 ); /* MCIF0_INITPLR7 - refresh */
+ mtdcr( 0x11, 0x99080000 );
+ mtdcr( 0x10, 0x00000058 ); /* MCIF0_INITPLR8 */
+ mtdcr( 0x11, 0x99080000 );
+ mtdcr( 0x10, 0x00000059 ); /* MCIF0_INITPLR9 */
+ mtdcr( 0x11, 0x99080000 );
+ mtdcr( 0x10, 0x0000005A ); /* MCIF0_INITPLR10 */
+ mtdcr( 0x11, 0x99080000 );
+ mtdcr( 0x10, 0x0000005B ); /* MCIF0_INITPLR11 - MR */
+ mtdcr( 0x11, 0x80800442 );
+ mtdcr( 0x10, 0x0000005C ); /* MCIF0_INITPLR12 - EMR OCD Default */
+ mtdcr( 0x11, 0x80810380 );
+ mtdcr( 0x10, 0x0000005D ); /* MCIF0_INITPLR13 - EMR OCD exit */
+ mtdcr( 0x11, 0x80810000 );
+ udelay( 10*1000 );
+
+ mtdcr( 0x10, 0x00000021 ); /* MCIF0_MCOPT2 - execute preloaded init */
+ mtdcr( 0x11, 0x28000000 ); /* set DC_EN */
+ udelay( 100*1000 );
+
+ mtdcr( 0x40, 0x0000F800 ); /* MQ0_B0BAS: base addr 00000000 / 256MB */
+ mtdcr( 0x41, 0x1000F800 ); /* MQ0_B1BAS: base addr 10000000 / 256MB */
+
+ mtdcr( 0x10, 0x00000078 ); /* MCIF0_RDCC - auto set read stage */
+ mtdcr( 0x11, 0x00000000 );
+ mtdcr( 0x10, 0x00000070 ); /* MCIF0_RQDC - read DQS delay control */
+ mtdcr( 0x11, 0x8000003A ); /* enabled, frac DQS delay */
+ mtdcr( 0x10, 0x00000074 ); /* MCIF0_RFDC - two clock feedback delay */
+ mtdcr( 0x11, 0x00000200 );
+
+ return 512 << 20;
+}
+
+
+/*************************************************************************
+ * long int initdram
+ *
+ ************************************************************************/
+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;
+}
+
+
+/*************************************************************************
+ * int testdram()
+ *
+ ************************************************************************/
+#if defined(CFG_DRAM_TEST)
+int testdram(void)
+{
+ unsigned long *mem = (unsigned long *) 0;
+ const unsigned long kend = (1024 / sizeof(unsigned long));
+ unsigned long k, n;
+
+ mtmsr(0);
+
+ for (k = 0; k < CFG_KBYTES_SDRAM;
+ ++k, mem += (1024 / sizeof(unsigned long))) {
+ if ((k & 1023) == 0) {
+ printf("%3d MB\r", k / 1024);
+ }
+
+ memset(mem, 0xaaaaaaaa, 1024);
+ for (n = 0; n < kend; ++n) {
+ if (mem[n] != 0xaaaaaaaa) {
+ printf("SDRAM test fails at: %08x\n",
+ (uint) & mem[n]);
+ return 1;
+ }
+ }
+
+ memset(mem, 0x55555555, 1024);
+ for (n = 0; n < kend; ++n) {
+ if (mem[n] != 0x55555555) {
+ printf("SDRAM test fails at: %08x\n",
+ (uint) & mem[n]);
+ return 1;
+ }
+ }
+ }
+ printf("SDRAM test passes\n");
+
+ return 0;
+}
+#endif
+
+
+/*************************************************************************
+ * 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 luan 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)
+{
+ return 1;
+}
+#endif /* defined(CONFIG_PCI) */
+
+
+/*************************************************************************
+ * hw_watchdog_reset
+ *
+ * This routine is called to reset (keep alive) the watchdog timer
+ *
+ ************************************************************************/
+#if defined(CONFIG_HW_WATCHDOG)
+void hw_watchdog_reset(void)
+{
+}
+#endif
+
+
+/*************************************************************************
+ * int on_off()
+ *
+ ************************************************************************/
+static int on_off( const char *s )
+{
+ if (strcmp(s, "on") == 0) {
+ return 1;
+ } else if (strcmp(s, "off") == 0) {
+ return 0;
+ }
+ return -1;
+}
+
+
+/*************************************************************************
+ * void l2cache_disable()
+ *
+ ************************************************************************/
+static void l2cache_disable(void)
+{
+ mtdcr( l2_cache_cfg, 0 );
+}
+
+
+/*************************************************************************
+ * void l2cache_enable()
+ *
+ ************************************************************************/
+static void l2cache_enable(void) /* see p258 7.4.1 Enabling L2 Cache */
+{
+ mtdcr( l2_cache_cfg, 0x80000000 ); /* enable L2_MODE L2_CFG[L2M] */
+
+ mtdcr( l2_cache_addr, 0 ); /* set L2_ADDR with all zeros */
+
+ mtdcr( l2_cache_cmd, 0x80000000 ); /* issue HCLEAR command via L2_CMD */
+
+ while (!(mfdcr( l2_cache_stat ) & 0x80000000 )) ;; /* poll L2_SR for completion */
+
+ mtdcr( l2_cache_cmd, 0x10000000 ); /* clear cache errors L2_CMD[CCP] */
+
+ mtdcr( l2_cache_cmd, 0x08000000 ); /* clear tag errors L2_CMD[CTE] */
+
+ mtdcr( l2_cache_snp0, 0 ); /* snoop registers */
+ mtdcr( l2_cache_snp1, 0 );
+
+ __asm__ volatile ("sync"); /* msync */
+
+ mtdcr( l2_cache_cfg, 0xe0000000 ); /* inst and data use L2 */
+
+ __asm__ volatile ("sync");
+}
+
+
+/*************************************************************************
+ * int l2cache_status()
+ *
+ ************************************************************************/
+static int l2cache_status(void)
+{
+ return (mfdcr( l2_cache_cfg ) & 0x60000000) != 0;
+}
+
+
+/*************************************************************************
+ * int do_l2cache()
+ *
+ ************************************************************************/
+int do_l2cache( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
+{
+ switch (argc) {
+ case 2: /* on / off */
+ switch (on_off(argv[1])) {
+ case 0: l2cache_disable();
+ break;
+ case 1: l2cache_enable();
+ break;
+ }
+ /* FALL TROUGH */
+ case 1: /* get status */
+ printf ("L2 Cache is %s\n",
+ l2cache_status() ? "ON" : "OFF");
+ return 0;
+ default:
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ return 0;
+}
+
+
+U_BOOT_CMD(
+ l2cache, 2, 1, do_l2cache,
+ "l2cache - enable or disable L2 cache\n",
+ "[on, off]\n"
+ " - enable or disable L2 cache\n"
+ );